Substrate and liquid storage container

Abstract

To detect whether short-circuiting has occurred between terminals in contact with a plurality of device side terminals.SOLUTION: A device outputs a first low voltage to a first terminal at a first timing during a period when a voltage input to a second terminal is high, outputs a second high voltage to the first terminal at a second timing during a period when the voltage input to the second terminal is low after the first low voltage has been output, and outputs a second low voltage to the first terminal at a third timing during a period when the voltage input to the second terminal is high after the second high voltage has been output.SELECTED DRAWING: Figure 11B

Description

[Technical Field]

[0001] The present disclosure relates to devices, substrates, liquid containing vessels, systems, and techniques for using the substrates or liquid containing vessels. [Background technology]

[0002] A technology has been known in the past for detecting the installation of ink cartridges that are detachably installed in printing devices, using installation detection terminals in a terminal group (Patent Document 1). The terminal group is composed of four installation detection terminals, including a terminal to which a high voltage higher than the power supply voltage is applied, and five memory terminals, and the installation detection terminals are arranged at the four corners of the terminal group, surrounding the memory terminals. In Patent Document 1, if it is detected that the installation detection terminals are electrically connected to the device-side terminals, the printing device determines that the ink cartridge is installed in the printing device.

[0003] Furthermore, a technology is known for detecting the installation of an ink cartridge that is detachably mounted in a printing device using a memory terminal (Patent Document 2). A storage device such as a memory provided in an ink cartridge outputs a response signal to the host terminal via one of a reset terminal, a clock terminal, or a data terminal to notify that the storage device is connected to a host device such as a printing device. The host device determines whether the storage device is connected to the host device based on the response signal from the storage device without using a terminal dedicated to connection detection. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2012-029311 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-170740 Summary of the Invention [Problem to be solved by the invention]

[0005] However, Patent Documents 1 and 2 do not mention detecting short circuits between memory terminals. Patent Document 1 states that if a short circuit between memory terminals occurs, even if it is determined that the ink cartridge is installed in the printing device, the printing device may not operate normally, and reading and writing to the ink cartridge memory may not be performed normally. Patent Document 2 states that if a short circuit between memory terminals occurs, the memory may not be able to output the intended signal to the printing device, and the printing device may not be able to determine that the memory is properly connected to the printing device.

[0006] The present disclosure has been made to solve the above-mentioned problems, and has as its object to provide a technology that can detect whether a short circuit has occurred between terminals in a liquid container such as an ink cartridge. Alternatively, it has as its object to provide a technology that can detect whether a liquid container is attached. Alternatively, it has as its object to provide a technology that can detect a short circuit even if one has occurred between terminals. Alternatively, it has as its object to provide a technology that can suppress a short circuit between terminals. The present disclosure achieves at least one of the above-mentioned multiple objects. [Means for solving the problem]

[0007] According to a first aspect of the present disclosure, there is provided a device configured to be electrically connected to a plurality of terminals of a liquid container attached to a printing device including a print head, a liquid introduction section that introduces liquid into the print head, a storage section provided with the liquid introduction section, and a plurality of device-side terminals provided in the storage section, the device being configured to satisfy the following I, II, III, and IV. I: A first signal including a first low voltage, a second signal including a second low voltage, and a second high voltage higher than the second low voltage is output to a first terminal included in the plurality of terminals. II: The first signal and the second signal are used by the printing device to determine that the first terminal and any other terminal included in the plurality of terminals other than the first terminal are not short-circuited, and that the liquid container is attached to the printing device. III: The first signal is output to the first terminal, and after outputting the first signal, the second signal is output to the first terminal. IV: A clock signal in which low voltages and high voltages alternate and are repeated at a predetermined cycle is input to a second terminal included in the other terminals, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first low voltage is output to the first terminal, and at a second timing during a period in which the voltage input to the second terminal is the low voltage after outputting the first low voltage, the second high voltage is output to the first terminal, and at a third timing during a period in which the voltage input to the second terminal is the high voltage after outputting the second high voltage, the second low voltage is output to the first terminal.

[0008] According to a second aspect of the present disclosure, there is provided a substrate configured to be mounted on a printing device including a print head, a liquid introduction section that introduces liquid into the print head, a storage section that is provided with the liquid introduction section and that stores a liquid storage container, and a plurality of apparatus-side terminals that are provided in the storage section, and to be in contact with the plurality of apparatus-side terminals. The substrate includes a base material, a device provided on the base material, and a plurality of terminals that are provided on the base material and electrically connected to the device, the plurality of terminals including a first terminal and other terminals including a second terminal, and is configured to satisfy I, II, III, and IV described below. I: The device outputs a first signal including a first low voltage, a second signal including a second low voltage, and a second high voltage higher than the second low voltage from the first terminal to the printing device. II: The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the board is installed in the printing device. III: The device outputs the first signal to the first terminal, and after outputting the first signal, outputs the second signal to the first terminal. IV: When the first terminal and the other terminal are not short-circuited, a clock signal that alternates between low and high voltages and repeats at a predetermined period is input from the printing device to the second terminal, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first low voltage is output from the first terminal to the printing device as a first expected value, and after outputting the first low voltage, at a second timing during a period in which the voltage input to the second terminal is the low voltage, the second high voltage is output from the first terminal to the printing device as a second expected value, and after outputting the second high voltage, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value.

[0009] According to a third aspect of the present disclosure, there is provided a liquid storage container to be attached to a storage section of a printing device, the liquid storage container comprising: a print head; a liquid introduction section that introduces liquid into the print head; a storage section provided with the liquid introduction section; and a plurality of device-side terminals provided in the storage section. The liquid storage container comprises: a liquid container capable of storing liquid; a liquid supply section that is attached to the liquid introduction section of the printing device and has a liquid supply port that supplies liquid from the liquid container to the liquid introduction section of the printing device; a device; and a plurality of terminals electrically connected to the device, the plurality of terminals including a first terminal and other terminals including a second terminal, and is configured to satisfy the following I, II, III, and IV. I: The device outputs a first signal including a first low voltage, a second signal including a second low voltage, and a second high voltage higher than the second low voltage from the first terminal to the printing device. II: The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the liquid container is attached to the printing device. III: The device outputs the first signal from the first terminal to the printing device, and after outputting the first signal, outputs the second signal from the first terminal to the printing device. IV: When the first terminal and the other terminal are not short-circuited, a clock signal that alternates between low and high voltages and repeats at a predetermined period is input from the printing device to the second terminal, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first low voltage is output from the first terminal to the printing device as a first expected value, and after the first low voltage is output, at a second timing during a period in which the voltage input to the second terminal is the low voltage, the second high voltage is output from the first terminal to the printing device as a second expected value, and after the second high voltage is output, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value.

[0010] According to a fourth aspect of the present disclosure, there is provided a printing system comprising: a printing apparatus, a liquid container capable of containing a liquid, a liquid supply unit having a liquid supply port, a device, a plurality of terminals connected to the device, and a substrate on which the device and the plurality of terminals are provided, the printing apparatus comprising: a print head, a liquid introduction unit that introduces liquid to the print head, and a plurality of apparatus-side terminals, the liquid introduction port of the liquid container supplies liquid from the liquid container to the liquid introduction unit of the printing apparatus, the substrate is attached to the printing apparatus and is configured to contact the plurality of apparatus-side terminals, the plurality of terminals include a first terminal and other terminals including a second terminal, and is configured to satisfy I, II, III, and IV described below. I: The device outputs a first signal including a first low voltage, a second signal including a second low voltage, and a second high voltage higher than the second low voltage from the first terminal to the printing device. II: The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the board is installed in the printing device. III: The device outputs the first signal from the first terminal to the printing device, and after outputting the first signal, outputs the second signal from the first terminal to the printing device. IV: When the first terminal and the other terminal are not short-circuited, a clock signal that alternates between low and high voltages and repeats at a predetermined period is input from the printing device to the second terminal, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first terminal outputs the first low voltage to the printing device as a first expected value, and at a second timing during a period in which the voltage input to the second terminal is the low voltage after outputting the first low voltage, the first terminal outputs the second high voltage to the printing device as a second expected value, and at a third timing during a period in which the voltage input to the second terminal is the high voltage after outputting the second high voltage, the first terminal outputs the second low voltage to the printing device as a third expected value.

[0011] According to a fifth aspect of the present disclosure, there is provided a printing system comprising: a printing device; and a liquid container attached to the printing device, the printing device comprising a print head, a liquid introduction section that introduces liquid into the print head, and a plurality of device-side terminals, the liquid container comprising a liquid container capable of containing liquid, a liquid supply section having a liquid supply port that supplies liquid from the liquid container to the liquid introduction section of the printing device, a device, and a plurality of terminals connected to the device, the plurality of terminals including a first terminal and other terminals including a second terminal, and configured to satisfy the following I, II, III, and IV. I: The device outputs a first signal including a first low voltage, a second signal including a second low voltage, and a second high voltage higher than the second low voltage from the first terminal to the printing device. II: The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the liquid container is attached to the printing device. III: The device outputs the first signal from the first terminal to the printing device, and after outputting the first signal, outputs the second signal from the first terminal to the printing device. IV: When the first terminal and the other terminal are not short-circuited, a clock signal that alternates between low and high voltages and repeats at a predetermined period is input from the printing device to the second terminal, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first terminal outputs the first low voltage to the printing device as a first expected value, and at a second timing during a period in which the voltage input to the second terminal is the low voltage after outputting the first low voltage, the first terminal outputs the second high voltage to the printing device as a second expected value, and at a third timing during a period in which the voltage input to the second terminal is the high voltage after outputting the second high voltage, the first terminal outputs the second low voltage to the printing device as a third expected value.

[0012] According to a sixth aspect of the present disclosure, there is provided use of a substrate that is mounted on a printing device including a print head, a liquid introduction section that introduces liquid into the print head, a storage section that is provided with the liquid introduction section and that stores a liquid storage container, and a plurality of apparatus-side terminals that are provided in the storage section, and that is configured to contact the plurality of apparatus-side terminals. This use of the substrate includes a base material, a device provided on the base material, and a plurality of terminals that are electrically connected to the device, the plurality of terminals including a first terminal and other terminals including a second terminal, and is configured to satisfy I, II, III, and IV described below. I: The device outputs a first signal including a first low voltage, a second signal including a second low voltage, and a second high voltage higher than the second low voltage from the first terminal to the printing device. II: The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the board is installed in the printing device. III: The device outputs the first signal from the first terminal to the printing device, and after outputting the first signal, outputs the second signal from the first terminal to the printing device. IV: When the first terminal and the other terminal are not short-circuited, a clock signal that alternates between low and high voltages and repeats at a predetermined period is input from the printing device to the second terminal, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first low voltage is output from the first terminal to the printing device as a first expected value, and after outputting the first low voltage, at a second timing during a period in which the voltage input to the second terminal is the low voltage, the second high voltage is output from the first terminal to the printing device as a second expected value, and after outputting the second high voltage, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value.

[0013] According to a seventh aspect of the present disclosure, there is provided use of a liquid storage container attached to a storage section of a printing device comprising a print head, a liquid introduction section that introduces liquid into the print head, a storage section provided with the liquid introduction section, and a plurality of device-side terminals provided in the storage section. The use of this liquid storage container comprises a liquid container capable of storing liquid, a liquid supply section that is attached to the liquid introduction section of the printing device and has a liquid supply port that supplies liquid from the liquid container to the liquid introduction section, a device, and a plurality of terminals electrically connected to the device, the plurality of terminals including a first terminal and other terminals including a second terminal, and is configured to satisfy I, II, III, and IV described below. I: The device outputs a first signal including a first low voltage, a second signal including a second low voltage, and a second high voltage higher than the second low voltage from the first terminal to the printing device. II: The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the liquid container is attached to the printing device. III: The device outputs the first signal from the first terminal to the printing device, and after outputting the first signal, outputs the second signal from the first terminal to the printing device. IV: When the first terminal and the other terminal are not short-circuited, a clock signal that alternates between low and high voltages and repeats at a predetermined period is input from the printing device to the second terminal, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first low voltage is output from the first terminal to the printing device as a first expected value, and after the first low voltage is output, at a second timing during a period in which the voltage input to the second terminal is the low voltage, the second high voltage is output from the first terminal to the printing device as a second expected value, and after the second high voltage is output, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view showing a hardware configuration of a printing system. [Figure 2] FIG. 1 is an explanatory diagram showing a schematic configuration of a printing system. [Figure 3] FIG. 2 is a first perspective view showing the configuration of a liquid storage container. [Figure 4] FIG. 2 is a second perspective view showing the configuration of the liquid storage container. [Figure 5] FIG. 1 is a first diagram showing the configuration of a substrate. [Figure 6] FIG. 2 is a second diagram showing the configuration of the substrate. [Figure 7A] FIG. 4 is a diagram showing a state in which a liquid container is attached to a carriage. [Figure 7B] FIG. 1 is a first view showing the connection mechanism. [Figure 7C] A second view showing the connection mechanism. [Figure 8] FIG. 2 is a diagram illustrating the electrical configuration of the printing system. [Figure 9] FIG. 2 is a diagram showing the functional configuration of the printing device together with one liquid container. [Figure 10A] 10 is a flowchart of a process executed by a printing device to determine the connection status. [Figure 10B] 10 is a flowchart of a process executed by a device in a connection state determination process. [Figure 11A] 6 is a timing chart showing when the printing device outputs a request signal. [Figure 11B] 10 is a timing chart showing when a device outputs a first response signal and a second response signal. [Figure 11C] FIG. 4 is a diagram showing details of a first response signal. [Figure 11D] FIG. 10 is a diagram showing details of a second response signal. [Figure 12] FIG. 4 is a diagram showing an outline of a connection state determination process executed by a main control unit. [Figure 13A] 10 is a first timing chart of the connection state determination process. [Figure 13B] 10 is a second timing chart of the connection state determination process. [Figure 14A] 10 is a third timing chart of the connection state determination process. [Figure 14B] 10 is a fourth timing chart of the connection state determination process. [Figure 15] 10 is a fifth timing chart of the connection state determination process. [Figure 16A] 10 is a sixth timing chart of the connection state determination process. [Figure 16B] 7 is a seventh timing chart of the connection state determination process. [Figure 17] 13 is an eighth timing chart of the connection state determination process. [Figure 18A] 9 is a ninth timing chart of the connection state determination process. [Figure 18B] 10 is a tenth timing chart of the connection state determination process. [Figure 19] 11 is an eleventh timing chart of the connection state determination process. [Figure 20A] 12 is a twelfth timing chart of the connection state determination process. [Figure 20B] 13 is a thirteenth timing chart of the connection state determination process. [Figure 20C] FIG. 10 is a diagram for explaining another specific example of the connection state determination process. [Figure 21A] FIG. 10 is a diagram illustrating a substrate as another embodiment 1. [Figure 21B] FIG. 21B is a diagram showing the arrangement examples shown in No. 2 and No. 3 in FIG. 21A. [Figure 22] 10A and 10B are diagrams showing two patterns of substrates as another embodiment 2. FIG. [Figure 23] 10A and 10B are diagrams showing two patterns of substrates as another embodiment 3. FIG. [Figure 24] 10A and 10B are diagrams showing two patterns of substrates as another embodiment 4. FIG. [Figure 25] 10A and 10B are diagrams showing two patterns of substrates as another embodiment 4. FIG. [Figure 26] FIG. 10 is a diagram illustrating a substrate as another embodiment 5. [Figure 27] 13A and 13B are diagrams showing two patterns of substrates as another sixth embodiment. [Figure 28] FIG. 13 is a diagram showing a substrate as another embodiment 7. [Figure 29] FIG. 10 is a perspective view showing a liquid container according to a first alternative embodiment. [Figure 30] FIG. 10 is a perspective view showing a liquid storage container according to a second alternative embodiment. [Figure 31] FIG. 10 is an enlarged view of the periphery of the substrate of the liquid storage container. [Figure 32] FIG. 11 is a perspective view showing a liquid storage container according to a third alternative embodiment. [Figure 33] FIG. 10 is a perspective view showing a liquid storage container according to a fourth alternative embodiment. [Figure 34] FIG. 13 is a perspective view showing a liquid storage container according to a fifth alternative embodiment. [Figure 35] FIG. 13 is a perspective view showing a liquid storage container according to a sixth alternative embodiment. [Figure 36] FIG. 13 is a diagram showing a liquid storage container according to a seventh alternative embodiment. [Figure 37] FIG. 13 is a diagram showing a liquid storage container according to an eighth alternative embodiment. [Figure 38] FIG. 13 is a perspective view showing a liquid storage container according to a ninth alternative embodiment. [Figure 39] Enlarged view of the board area. [Figure 40] FIG. 1 is a first diagram illustrating a process of attaching a liquid container to a container unit of a printing device. [Figure 41] FIG. 2 is a second diagram illustrating the process of attaching the liquid container to the container unit of the printing device. [Figure 42] FIG. 10 is a diagram showing a state in which the liquid storage container has been completely attached. [Figure 43] FIG. 10 is a diagram showing a printing system according to another embodiment 1. [Figure 44] FIG. 10 is a diagram showing a printing system according to another embodiment 2. [Figure 45] FIG. 10 is a diagram showing a printing system according to a third alternative embodiment. [Figure 46] FIG. 10 is a diagram showing a printing system according to a fourth alternative embodiment. [Figure 47A] 10 is a first timing chart for a printing system equipped with six liquid storage containers. [Figure 47B] 10 is a second timing chart for a printing system equipped with six liquid storage containers. [Figure 48] FIG. 2 is a diagram showing a schematic diagram of the electrical configuration of a printing system equipped with six liquid storage containers. [Figure 49] FIG. 10 is a diagram showing a device according to another embodiment 1. DETAILED DESCRIPTION OF THE INVENTION

[0015] A. First embodiment: A1. Hardware configuration: An overview of a printing system 1000 will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing the hardware configuration of the printing system 1000. FIG. 2 is an explanatory diagram showing the schematic configuration of the printing system 1000. FIG. 1 shows X, Y, and Z axes, which are orthogonal to each other. The directions of the X, Y, and Z arrows indicate the positive directions along the X, Y, and Z axes, respectively. The positive directions along the X, Y, and Z axes are referred to as the +X direction, +Y direction, and +Z direction, respectively. The directions opposite to the directions of the X, Y, and Z arrows are the negative directions along the X, Y, and Z axes, respectively. The negative directions along the X, Y, and Z axes are referred to as the -X direction, -Y direction, and -Z direction, respectively. The directions along the X, Y, and Z axes, regardless of whether they are positive or negative, are referred to as the X direction, Y direction, and Z direction, respectively. This also applies to subsequent figures and descriptions. The X-axis, Y-axis, and Z-axis depicted in other figures correspond to the X-axis, Y-axis, and Z-axis in Fig. 1. In Fig. 1, when the printing system 1000 is in the normal usage position, the direction in front of the printing system 1000 is the +Y direction. The +Z direction is the direction of gravity, and the -Z direction is the anti-gravity direction.

[0016] The printing system 1000 includes a printing device 20 and a plurality of liquid containers 100. The printing device 20 is specifically an inkjet printer. The liquid containers 100 are specifically ink cartridges. The printing device 20 includes a head drive mechanism, a main scanning feed mechanism, and a sub-scanning feed mechanism.

[0017] The head drive mechanism includes a carriage 30. The carriage 30 includes a storage unit 4 and a print head 5. The storage unit 4 is configured to detachably mount four liquid containers 100. In this disclosure, "the liquid containers 100 are mounted in the printing device 20" means that the liquid containers 100 are physically attached to the printing device 20, and the contact portions cp of terminals 290 (described later) are electrically connected to device-side terminals 490 (described later). The four liquid containers 100 are each housed in a predetermined position in the storage unit 4. In this disclosure, the four liquid containers 100 each contain a different color liquid. Specifically, the liquid is ink, and will hereinafter be referred to as ink. When the four liquid containers 100 are to be distinguished from one another, they will be referred to as liquid containers 100A to 100D. The carriage 30 is configured to be movable between a replacement position where the liquid container 100 can be replaced and a standby position where the liquid container 100 cannot be replaced.

[0018] The print head 5 is provided on the +Z direction surface of the carriage 30. The surface of the print head 5 facing the +Z direction is provided with multiple nozzles that eject ink droplets. Each nozzle is connected to one of the liquid storage containers 100A to 100D attached to the storage unit 4 via a flow path within the carriage 30. The storage unit 4 is provided with a liquid introduction unit 6 (described below) and a connection mechanism 400 (described below). The liquid introduction unit 6 is configured to be detachable from a liquid supply port 104op (described below) of the liquid storage container 100. The liquid introduction unit 6 receives ink from the liquid storage container 100 and introduces the ink into the print head 5 via a flow path within the carriage 30. The connection mechanism 400 has multiple device-side terminals 490 (described below).

[0019] The main scanning feed mechanism includes a drive belt 36, a carriage motor 32, a sliding shaft 34, and a pulley 38. The drive belt 36 is an endless belt that is stretched between the carriage motor 32 and the pulley 38. A carriage 30 is fixed to the drive belt 36. The sliding shaft 34 is arranged parallel to the axis of a paper feed roller 26 (described later), and slidably holds the carriage 30. As the carriage motor 32 rotates, the carriage 30, which is fixed to the drive belt 36, moves in the +X direction and the -X direction along the sliding shaft 34.

[0020] The sub-scanning feed mechanism includes a paper feed motor 22 and a paper feed roller 26. When the paper feed motor 22 rotates, the paper feed roller 26 transports the printing medium PA in the Y direction.

[0021] The printing device 20 further includes a main control unit 40. The main control unit 40 is connected to the carriage 30 by a cable 31. A bus 46 is formed in the cable 31, and the main control unit 40 is electrically connected to a sub-control board 500 of the carriage 30 (described later) via the bus 46.

[0022] The main control unit 40 controls the above mechanisms to achieve the printing process. The main control unit 40 receives a user's print job, for example, from the computer 90 via the connector 80, and executes printing based on the contents of the received print job. The print medium PA is transported in the +Y direction by the paper feed roller 26, and the print head 5 mounted on the carriage 30 is moved in the +X and -X directions by the drive belt 36. As a result, ink ejected from the print head 5 in the +Z direction lands at any desired location on the print medium PA, forming an image. In this disclosure, "image" includes characters and symbols. In this disclosure, the +X and -X directions in which the carriage 30 moves are collectively referred to as the "main scanning direction." The -Y and +Y directions in which the print medium PA is fed are collectively referred to as the "sub-scanning direction."

[0023] The printing device 20 further includes an operation unit 70. The user uses the operation unit 70 to perform various settings for the printing device 20 and to check the status of the printing device 20.

[0024] As described above, the printing device 20 comprises the print head 5, a liquid introduction section 6 that introduces liquid into the print head 5, a storage section 4 that is provided with the liquid introduction section 6 and that stores the liquid storage container 100, and a plurality of device-side terminals 490. The print head 5 is provided in the printing device 20. The print head 5 is not provided in the liquid storage container 100. The form in which the print head 5 is provided in the liquid storage container 100 differs from the technical field of this disclosure.

[0025] The configuration of the liquid storage container 100 will be described with reference to Figures 3 and 4. Figure 3 is a first perspective view showing the configuration of the liquid storage container 100. Figure 4 is a second perspective view showing the configuration of the liquid storage container 100. As with Figure 1, the orientations of the X-axis, Y-axis, and Z-axis of the liquid storage container 100 are based on a state in which the printing device 20 is placed on a horizontal plane parallel to the X direction and Y direction, and the liquid storage container 100 is attached to the printing device 20.

[0026] 3 and 4, the liquid storage container 100 has an external shape that is a substantially rectangular parallelepiped. As shown in Fig. 3, the liquid storage container 100 includes a liquid storage body 101 that can store ink as a liquid, a liquid supply part 104 having a liquid supply port 104op, and a substrate 120.

[0027] The liquid container 101 forms the outer shell of the liquid container 100. The liquid container 101 has a first wall 101wf, a second wall 101wr, a third wall 101wb, a fourth wall 101wu, a fifth wall 101wsa, and a sixth wall 101wsb. These six walls 101wf, 101wr, 101wb, 101wu, 101wsa, and 101wsb define an ink chamber 150 for storing ink inside the liquid container 101. The first wall 101wf is the wall on the +Y direction side and constitutes the front wall. The front wall faces the front side of the printing system 1000. The second wall 101wr faces the first wall 101wf. The second wall 101wr is the wall on the -Y direction side and constitutes the rear wall. The rear wall faces the rear side of the printing system 1000. The third wall 101wb intersects with the first wall 101wf and the second wall 101wr, and in this embodiment, they are substantially perpendicular to each other. The third wall 101wb is a wall on the +Z direction side and constitutes the bottom wall. The fourth wall 101wu intersects with the first wall 101wf and the second wall 101wr, and in this embodiment, they are substantially perpendicular to each other. The fourth wall 101wu faces the third wall 101wb. The fourth wall 101wu is a wall on the -Z direction side and constitutes the top wall. The fifth wall 101wsa intersects with the first wall 101wf to the fourth wall 101wu, and in this embodiment, they are substantially perpendicular to each other. The fifth wall 101wsa is a wall on the -X direction side and constitutes the right side wall. The sixth wall 101wsb intersects with the first to fourth walls 101wf to 101wu, and in this embodiment, they are substantially perpendicular to each other. The sixth wall 101wsb faces the fifth wall 101wsa. The sixth wall 101wsb is the wall on the +X direction side and constitutes the left wall.

[0028] The liquid supply unit 104 is a cylindrical member that protrudes from the third wall 101wb. The liquid supply port 104op is located at the tip side of the liquid supply unit 104. The liquid supply port 104op communicates with the ink chamber 150 of the liquid container 101, and when the liquid storage container 100 is attached to the carriage 30 of the printing device 20, supplies ink to a liquid introduction portion 6 of the carriage 30 (described later). The liquid supply port 104op is sealed by a film 104f. The liquid supply port 104op is configured to be detachable from the liquid introduction portion 6. When the liquid storage container 100 is attached to the carriage 30, the film 104f is broken by the liquid introduction portion 6. The ink stored in the ink chamber 150 is supplied to the print head 5 of the printing device 20 via the liquid introduction portion 6. As the ink in the ink chamber 150 is consumed, air is introduced into the ink chamber 150 through an air vent (not shown).

[0029] The direction in which the liquid container 100 is mounted on the carriage 30 of the printing device 20 is referred to as the mounting direction MD. The mounting direction MD is also the direction in which the substrate 120 is mounted on the carriage 30 of the printing device 20. In this embodiment, the mounting direction MD is the +Z direction. Two directions that are perpendicular to each other are referred to as the first direction FD and the second direction SD. The first direction FD is a direction that includes a component of the mounting direction MD. In this embodiment, the first direction FD is the Z direction, and the second direction FD is the X direction. The first direction FD is a direction that is substantially along the front surface 120fa of the substrate 120.

[0030] The first direction FD is also defined as follows. For example, the first direction FD is a direction perpendicular to an imaginary plane including the liquid supply port 104op. For example, the first direction FD is a direction in which device-side terminals 490 of the printing device 20 (described later) pass over terminals 120 (described later) when the liquid storage container 100 or the substrate 120 is attached to the carriage 30. For example, the first direction FD is a direction perpendicular to the direction in which the multiple device-side terminals 490 of the printing device 20 are arranged. In another embodiment, when the front surface 120fa is inclined with respect to the attachment direction MD, the first direction FD is a direction different from the attachment direction MD.

[0031] The substrate 120 is used in the liquid container 100. In this embodiment, as shown in Fig. 4, the substrate 120 is provided on the second wall 101wr of the liquid container 101. Details of the substrate 120 will be described later.

[0032] Two protrusions Pr1 and Pr2 are formed on the second wall 101wr. These protrusions Pr1 and Pr2 protrude in the −Y direction. A hole 122 and a notch 121 are formed on the substrate 120 to receive the protrusions Pr1 and Pr2, respectively. The hole 122 is formed in the center of the end of the substrate 120 on the liquid supply unit 104 side, and the notch 121 is formed in the center of the end of the substrate 120 on the opposite side from the liquid supply unit 104. When fixing the substrate 120 to the second wall 101wr, the protrusions Pr1 and Pr2 are inserted into the hole 122 and the notch 121, respectively. After the substrate 120 is inserted into the second wall 101wr, the tips of the protrusions Pr1 and Pr2 are crushed. This fixes the substrate 120 to the second wall 101wr. Note that the means for fixing the substrate 120 to the second wall 101wr is not limited to this.

[0033] In this embodiment, when the liquid storage container 100 is viewed from a direction perpendicular to the second wall 101wr on which the substrate 120 is provided, the substrate 120 is disposed so that the central axis of the liquid supply port 104op overlaps with a first virtual line C1, which will be described later. A contact portion cp, which will be described later, is not disposed on the central axis of the liquid supply port 104op.

[0034] As shown in FIG. 3, the liquid container 100 further includes a liquid detection member 110. The liquid detection member 110 is fixed inside the liquid container 101. The liquid detection member 110 is a member used by the printing device 20 to detect the remaining amount of ink in the liquid container 100. The liquid detection member 110 may be, for example, a prism for optically detecting the remaining amount of ink, a piezoelectric element in which a piezoelectric body is sandwiched between two opposing electrodes, or two electrodes that detect the remaining amount of ink based on the difference in resistance between the electrodes. Note that the liquid detection member 110 does not necessarily have to be provided.

[0035] The details of the substrate 120 will be described with reference to FIGS. 5 and 6. FIG. 5 is a first diagram showing the configuration of the substrate 120. FIG. 6 is a second diagram showing the configuration of the substrate 120. As shown in FIG. 6, the substrate 120 includes a base material 120bd, a plurality of terminals 290, a device 130, and wiring (not shown). The substrate 120 may also include other components. The base material 120bd has a front surface 120fa and a back surface 120fb. In this embodiment, the front surface 120fa and the back surface 120fb are both flat surfaces. The base material 120bd may be made of a material that forms a rigid substrate, a flexible substrate, or the like. The terminals 290 are formed of a conductor such as gold foil.

[0036] In the present disclosure, the "surface" is defined, for example, as follows. For example, the "surface" is the surface of the base material 120bd that faces the device-side terminals 490, which will be described later, when the liquid storage container 100 or the substrate 120 is attached to the printing device 20. For example, the "surface" is the surface of the base material 120bd that faces the device-side terminals 490, which will be described later, when the liquid storage container 100 or the substrate 120 is attached to the printing device 20, as well as the surface on which the terminals 290 are formed. For example, the "surface" is the surface of the base material 120bd that includes the contact portion cp, which will be described later. In this embodiment, the "surface" is the front surface 120fa. In other embodiments, the "surface" is the front surface 120fa unless otherwise specified.

[0037] As shown in FIG. 5, the multiple terminals 290 include a data terminal 210, a clock terminal 220, a power terminal 230, a reset terminal 240, and a ground terminal 250. Each of the terminals 210, 220, 230, 240, and 250 is connected to the device 130. Each of the terminals 210 to 250 is electrically connected to the device 130 via a wiring pattern layer provided on the front surface 120fa and the back surface 120fb of the substrate 120bd or a through-hole provided inside the substrate 120bd. The data terminal 210 is used to send and receive a data signal SDA between the device 130 and the printing device 20. Here, "signal" refers to a change in voltage. Signals transmitted and received via the data terminal 210 include, for example, signals indicating various data stored in the memory unit 138 (described later), signals controlled by the processing unit 136 (described later) and not stored in the memory unit 138, and signals controlled by the main control unit 40 or sub-control unit 50 of the printing device 20 and not stored in the memory unit 138. The clock terminal 220 is used to send a clock signal SCK from the printing device 20 to the device 130. The power terminal 230 is used to supply a power supply voltage VDD from the printing device 20 to the device 130. The reset terminal 240 is used to send a reset signal RST from the printing device 20 to the device 130. The ground terminal 250 is grounded via a device-side terminal 450 (described later) of the printing device 20. The voltages supplied to the data terminal 210, clock terminal 220, power terminal 230, and reset terminal 240 are voltages acceptable to the device 130. The range of voltage supplied to each terminal 210-240 is the same, and in this embodiment, is approximately 0V to approximately 3.3V. A voltage that can be accepted by the device 130 is, for example, a voltage lower than the voltage used to drive the print head 5, a voltage similar to the power supply voltage VDD, a voltage lower than the withstand voltage of the device 130, a voltage that will not destroy the device 130, or a voltage that will not cause the device 130 to malfunction. Here, the check terminal used for shipping inspection is not included in the terminals 290 of the present disclosure. The check terminal is a terminal that does not come into contact with the device-side terminal 490 of the printing device 20 when the liquid container 100 is attached to the printing device 20. The check terminal does not form a contact portion cp, which will be described later.

[0038] As shown in Figure 5, each of the terminals 210, 220, 230, 240, and 250 includes a contact portion cp that is to come into contact with a corresponding device-side terminal 410, 420, 430, 440, or 450 among a plurality of device-side terminals 490 of the connection mechanism 400 of the printing device 20 when the liquid storage container 100 is attached to the storage unit 4. The contact portion cp of the data terminal 210 is also referred to as a data contact portion cpd. The contact portion cp of the clock terminal 220 is also referred to as a clock contact portion cpc. The contact portion cp of the power terminal 230 is also referred to as a power contact portion cpvd. The contact portion cp of the reset terminal 240 is also referred to as a reset contact portion cpr. The contact portion cp of the ground terminal 250 is also referred to as a ground contact portion cpvs. The contact portions cp are areas on the terminals 210, 220, 230, 240, and 250 that are to come into contact with the device-side terminals 410, 420, 430, 440, and 450 when the liquid container 100 is attached to the container 4, and are areas that can be recognized by the liquid container 100 alone. The substrate 120 has a data contact portion cpd, a clock contact portion cpc, a power contact portion cpvd, a reset contact portion cpr, and a ground contact portion cpvs. The connection between the terminal 290 and the device-side terminal 490 of the printing device 20 will be described later. The terminal 290 and its corresponding contact portion cp may be located in addition to the terminals 210 to 250 described above.

[0039] The data terminal 210 is used to detect whether the data terminal 210 is short-circuited to at least one of the clock terminal 220, the power terminal 230, and the reset terminal 240. Specifically, the data terminal 210 is used to detect whether the data terminal 210 is in a short-circuited state, which will be described later, with at least one of the clock terminal 220, the power terminal 230, and the reset terminal 240. The data terminal 210 is used to detect whether the liquid container 100 is attached to the printing device 20. Specifically, the data terminal 210 is used to detect whether the liquid container 100 is in an attachment complete state, which will be described later, or an attachment incomplete state, which will be described later.

[0040] Hereinafter, the substrate 120 will be viewed from above. As shown in Fig. 5, two perpendicular straight lines are defined as a first virtual line C1 and a second virtual line C2. In this embodiment, the first virtual line C1 is oriented along the first direction FD, and the second virtual line C2 is oriented along the second direction SD. In this embodiment, the two perpendicular straight lines that are substantially aligned with the surface 120fa of the base material 120bd are defined as the first virtual line C1 and the second virtual line C2.

[0041] Assume that all contact portions cp of all terminals 290 provided on the base material 120bd of the substrate 120 are projected onto the second virtual line C2. In this embodiment, the data contact portion cpd, the clock contact portion cpc, the power contact portion cpvd, the reset contact portion cpr, and the ground contact portion cpvs are projected onto the second virtual line C2. Regarding the projected positions of the contact portions cp, the projected position of the data contact portion cpd is swd, the projected position of the clock contact portion cpc is swc, the projected position of the power contact portion cpvd is swvd, the projected position of the reset contact portion cpr is swr, and the projected position of the ground contact portion cpvs is swvs. Each of the projected positions swd, swc, swvd, swr, and swvs is an orthogonal projection of each of the contact portions cpd, cpc, cpvd, cpr, and cpvs perpendicularly projected onto the second virtual line C2. In this case, all of the contact portions cp are projected at different positions. The data contacts cpd, clock contacts cpc, power contacts cpvd, reset contacts cpr, and ground contacts cpvs are arranged so that the respective virtual lines along the first virtual line C1 passing through each contact cp are parallel without overlapping or intersecting with each other. Furthermore, the first virtual line C1 passes through the midpoint MP between the two most distant projection positions of all the contacts cp. In this embodiment, the first virtual line C1 passes through the midpoint MP between the projection position swvs of the ground contact cpvs and the projection position swvs of the data contacts cpd, clock contacts cpc, power contacts cpvd, and reset contacts cpr, which is the most distant from the projection position swvs of the ground contact cpvs. In this embodiment, the first virtual line C1 passes through the midpoint MP between the projection position swc of the clock contact cpc and the projection position swvs of the ground contact cpvs.

[0042] With respect to the first virtual line C1, one region of the base material 120bd of the substrate 120 is defined as a first region Rg1, and the other region of the base material 120bd of the substrate 120 is defined as a second region Rg2. In this embodiment, the first region Rg1 is a region on the −X direction side, which is the negative direction of the second direction SD, of the first virtual line C1, and the second region Rg2 is a region on the +X direction side, which is the positive direction of the second direction SD, of the first virtual line C1. The first region Rg1 is also one region of the substrate 120 sandwiching the first virtual line C1, and the second region Rg2 is also the other region of the substrate 120 sandwiching the first virtual line C1. Of all the contact portions cp, some contact portions cpa are arranged in the first region Rg1, and the remaining contact portions cpb are arranged in the second region Rg2. Some of the contacts cpa arranged in the first region Rg1 include data contacts cpd, clock contacts cpc, power contacts cpv, and reset contacts cpr. The remaining contacts cpb arranged in the second region Rg2 include ground contacts cpvs. The clock contacts cpc, data contacts cpd, reset contacts cpr, and power contacts cpvd are arranged on one side of the first virtual line C1, and the ground contacts cpvs are arranged on the other side. Some of the contacts cpa and the remaining contacts cpb are arranged asymmetrically with respect to the first virtual line C1. No contacts cp are provided on the first virtual line C1.

[0043] The ground contact portion cpvs is arranged at the end of the multiple contact portions cp in the +X direction, which is the positive direction of the second direction SD. Among the clock contact portion cpc, the data contact portion cpd, the power contact portion cpvd, and the reset contact portion cpr, any one of the multiple contact portions cp is arranged at the end of the multiple contact portions cp in the -X direction, which is the negative direction of the second direction SD. This any one contact portion cp is located on one side of the multiple contact portions cp in the second direction SD. The ground contact portion cpvs is located on the other side of the multiple contact portions cp in the second direction SD. In the first region Rg1, among the contact portions cp excluding the ground contact portion cpvs, the distance in the direction along the second virtual line C2 between the contact portion cp that is projected at a position farthest from the projection position swvs of the ground contact portion cpvs and the ground contact portions cpvs provided in the second region Rg2 is Wa. In this embodiment, the distance between the projection position swc of the clock contact portion cpc and the projection position swvs of the ground contact portion cpvs in the direction along the second virtual line C2 is Wa. In this embodiment, the distance between the clock contact portion cp and the ground contact portion cpvs in the second direction SD is Wa.

[0044] The data contact portion cpd, the clock contact portion cpc, the power contact portion cpvd, and the reset contact portion cpr are preferably arranged away from the ground contact portion cpvs. For example, in the first region Rg1, among the contact portions cp excluding the ground contact portion cpvs, the distance in the direction along the second virtual line C2 between the contact portion cp that is projected at a position closest to the projection position swvs of the ground contact portion cpvs when projected onto the second virtual line C2 and the ground contact portion cpvs provided in the second region Rg2 is Wa / 2 or more. In this embodiment, among the contact portions cpd, cpvd, cpr, and cpvd excluding the ground contact portion cpvs in the first region Rg1, the distance in the second direction SD between the reset contact portion cpr located on the positive side of the second direction SD and the ground contact portion cpvs provided in the second region Rg2 is Wa / 2 or more. For example, in the first region Rg1, among the contacts cp other than the ground contact cpvs, there is no other contact cp connected to the device 130 via the terminal 290 between the contact cp that is projected onto the second virtual line C2 at a position closest to the projection position swvs of the ground contact cpvs and the ground contact cpvs provided in the second region Rg2. In this embodiment, there is no other contact cp connected to the device 130 via the terminal 290 in the region between the reset contact cpr that is provided at the end of the first region Rg1 in the +X direction, which is the positive direction of the second direction SD, and the ground contact cpvs provided in the second region Rg2. For example, the other contacts cpd, cpc, cpvd, cpr and ground contact cpvs arranged on the substrate 120 are not provided on the first virtual line C1.

[0045] The substrate 120 is arranged so that at least one contact portion cp of the clock contact portion cpc, the power contact portion cpvd, and the reset contact portion cpr is projected between the projection position swd of the data contact portion cpd and the projection position swvs of the ground contact portion cpvs. Preferably, the substrate 120 is arranged so that any two or more contact portions cp of the clock contact portion cpc, the power contact portion cpvd, and the reset contact portion cpr are projected between the projection position swd of the data contact portion cpd and the projection position swvs of the ground contact portion cpvs. In this embodiment, the substrate 120 is arranged so that the power contact portion cpvd and the reset contact portion cpr are projected between the projection position swd of the data contact portion cpd and the projection position swvs of the ground contact portion cpvs.

[0046] On the substrate 120, the data contact portion cpd is arranged so as to be projected between the projection positions of any two contact portions cp among the power contact portion cpvd, the reset contact portion cpr, and the clock contact portion cpc. The data contact portion cpd is not the contact portion projected to the extreme end on the second virtual line C2. In this embodiment, the data contact portion cpd is arranged so as to be projected between the projection positions of the clock contact portion cpc and the power contact portion cpvd.

[0047] The substrate 120 is arranged so that one or both of the data contacts CPD and the reset contacts CPR are projected between the projection position SWVD of the power contacts CPVD and the projection position SWC of the clock contacts CPC. The reset contacts CPR are arranged so that their projection position SWR is adjacent to the projection position SWVD of the power contacts CPVD. In this embodiment, the substrate 120 is arranged so that the data contacts CPD are projected between the projection position SWVD of the power contacts CPVD and the projection position SWC of the clock contacts CPC. "Arranged adjacent to each other" does not necessarily mean that one contact and another contact are closest to each other. Other configurations may be arranged between one contact and another contact without departing from the spirit of the present disclosure.

[0048] On the substrate 120, the power contact cpvd is arranged so that its projected position swvd is adjacent to the projected position swd of the data contact cpd.

[0049] In this embodiment, the clock contact portion cpc is arranged on the substrate 120 so that it is projected at a position farthest from the projection position swvs of the ground contact portion cpvs. The data contact portion cpd, the power contact portion cpvd, and the reset contact portion cpr are arranged so that they are projected in order from the projection position swc of the clock contact portion cpc on the second virtual line C2 toward the projection position swvs of the ground contact portion cpvs. The clock contact portion cpc is located at the extreme end in the −X direction, which is the negative direction of the second direction SD. The contact portions cp other than the clock contact portion cpc are arranged in the order of data contact portion cpd, power contact portion cpvd, and reset contact portion cpr, from the −X direction, which is the negative direction of the second direction SD, toward the +X direction, which is the positive direction. The multiple contact portions cp are arranged so that their respective projection positions, from the −X direction to the +X direction, are in the order of clock contact portion cpc, data contact portion cpd, power contact portion cpvd, reset contact portion cpr, and ground contact portion cpvs.

[0050] The clock contacts cpc, data contacts cpd, power contacts cpvd, reset contacts cpr, and ground contacts cpvs are arranged to form multiple columns. The multiple columns are parallel to the second virtual line C2 and perpendicular to the first virtual line C1. In this embodiment, the multiple contacts cp are arranged to form two columns perpendicular to the first direction FD, and the two columns are parallel to the second direction SD. The direction in which the two columns are aligned is along the first virtual line C1, which in this embodiment is along the first direction FD. The two columns are referred to as the first column R1 and the second column R2. The first column R1 is formed by the clock contacts cpc, power contacts cpvd, and ground contacts cpvs. The second column R2 is formed by the data contacts cpd and reset contacts cpr. The data contacts cpd and reset contacts cpr that form the second row R2, and the clock contacts cpc, power contacts cpvd, and ground contacts cpvs that form the first row R1, are arranged alternately so that the contacts cp are not aligned in the direction of the first virtual line C1, forming a so-called staggered arrangement. Two contacts cp on the substrate 120bd that are adjacent to each other when projected onto the second virtual line C2 form different rows. The data contacts cpd and the ground contacts cpvs are arranged in different rows. One of the contacts cp among the clock contacts cpc, power contacts cpvd, and reset contacts cpr is arranged to be projected between the projection position swd of the data contacts cpd and the projection position swvs of the ground contacts cpvs. In this embodiment, the reset contacts cpr and power contacts cpvd are arranged to be projected between the projection position swd of the data contacts cpd and the projection position swvs of the ground contacts cpvs. In this embodiment, the contact portions cp of the terminals 210 to 250 are arranged to form a first row R1 and a second row R2, but this is not limited to this. For example, the contact portions cp of the terminals 210 to 250 may be arranged to form three or four rows. A row may also be formed by one contact portion cp.

[0051] The distance between the ground contact cpvs and the reset contact cpr is defined as distance Dan. The distance between the data contact cpd and the clock contact cpc is defined as distance Dbn. The distance between the data contact cpd and the ground contact cpvs is defined as distance Dcn. The distance between the data contact cpd and the reset contact cpr is defined as distance Ddn. The distance between the data contact cpd and the power contact cpvd is defined as Den. In this case, distance Dcn is longer than distance Dbn. Distance Dcn is longer than distance Den. Distance Dcn is longer than distance Ddn. In this embodiment, distance Dbn and distance Den are the same. The distance between the data contact cpd and the contact cp farthest from the data contact cpd among the multiple contacts cp excluding the ground contact cpvs is distance Dbn and distance Den. In this case, distance Dan is longer than distance Dbn and distance Den.

[0052] The clock contact cpc, the reset contact cpr, and the power supply contact cpvd are arranged adjacent to the data contact cpd between the data contact cpd and the ground contact cpvs so as to surround the data contact cpd. The data contact cpd is arranged inside an imaginary circle Vcr that passes through the clock contact cpc, the reset contact cpr, and the power supply contact cpvd, so that the clock contact cpc, the reset contact cpr, and the power supply contact cpvd surround the data contact cpd.

[0053] The imaginary line segment connecting the clock contact portion cpc and the data contact portion cpd is the first line segment FL, the imaginary line segment connecting the reset contact portion cpr and the data contact portion cpd is the second line segment SL, and the imaginary line segment connecting the power contact portion cpvd and the data contact portion cpd is the third line segment TL. On the first line segment FL, there are no contact portions cp of terminals 290 other than the clock contact portion cpc and the data contact portion cpd. On the second line segment SL, there are no contact portions cp of terminals 290 other than the reset contact portion cpr and the data contact portion cpd. On the third line segment TL, there are no contact portions cp of terminals 290 other than the power contact portion cpvd and the data contact portion cpd.

[0054] In this embodiment, the five terminals 210 to 250 have the same positional relationship as the contact portions cpd, cpc, cpvd, cpr, and cpvs described above. That is, the data terminal 210, the clock terminal 220, the reset terminal 240, and the power terminal 230 are arranged in the first region Rg1. The ground terminal 250 is arranged in the second region Rg2. No terminals 290 other than the clock terminal 220 and the data terminal 210 are arranged on the first line segment FL. No terminals 290 other than the reset terminal 240 and the data terminal 210 are arranged on the second line segment SL. No terminals 290 other than the power terminal 230 and the data terminal 210 are arranged on the third line segment TL.

[0055] As described above, the data terminal 210 is used to detect whether or not a short circuit has occurred between the data terminal 210 and the clock terminal 220, the reset terminal 240, and the power terminal 250, and whether or not the liquid storage container 100 is attached to the printing device 20, and at least a portion of the arrangement of the contact portion cp in this disclosure is determined to enable such detection.

[0056] 6, the device 130 is configured to be provided on a substrate 120bd. The device 130 includes a processing unit 136. In this embodiment, the device 130 includes the processing unit 136 and a storage unit 138. The device 130 is molded (sealed) with a resin 139. The device 130 may be mounted on the substrate 120bd by another method.

[0057] The processing unit 136 is configured by, for example, a circuit. The processing unit 136 is connected to the terminals 210 to 250, and controls the signals and voltages input and output to and from the terminals 210 to 250. The processing unit 136 may be a circuit having a high-level arithmetic processing function such as a CPU. The processing unit 136 will be described in detail later.

[0058] The storage unit 138 is configured by, for example, a non-volatile memory such as a flash memory. The storage unit 138 stores information related to the liquid storage container 100. The information related to the liquid storage container 100 includes, for example, the amount of ink consumed, the color of ink, the manufacturing date of the liquid storage container 100, and identification information of the liquid storage container 100. In this embodiment, the liquid storage containers 100A to 100D are assigned the numbers "1" to "4" as identification information, respectively.

[0059] 7A to 7C, the configuration of the carriage 30 and how the liquid storage container 100 is attached to the carriage 30 will be described. FIG. 7A is a diagram showing how the liquid storage container 100 is attached to the carriage 30. FIG. 7B is a first diagram showing the connection mechanism 400. FIG. 7C is a second diagram showing the connection mechanism 400.

[0060] The carriage 30 includes a storage unit 4 and a print head 5. The storage unit 4 is disposed above the print head 5 and is configured to allow multiple liquid storage containers 100 to be attached and detached. A mounting chamber 65 is formed within the storage unit 4, into which the liquid storage containers 100 are attached. In this embodiment, four mounting chambers 65 are provided, corresponding to the number of liquid storage containers 100A-100D. The print head 5 includes multiple nozzles and multiple piezoelectric elements, and ejects ink droplets from each nozzle in response to a voltage applied to each piezoelectric element to form dots on the print medium PA. The storage unit 4 is provided with a liquid introduction unit 6, a sub-control board 500, and a connection mechanism 400. The liquid introduction unit 6 is disposed above the print head 5 when the printing system 1000 is in its normal operating position, and introduces ink from the liquid supply port 104op of the liquid storage container 100 to the print head 5. In this embodiment, four liquid introduction units 6 are provided, corresponding to the number of liquid storage containers 100A-100D. The sub-control board 500 is mounted with a plurality of sub-control board terminals 510, 520, 530, 540, and 550, and a sub-control unit 50. When the plurality of sub-control board terminals 510, 520, 530, 540, and 550 are referred to without distinction, the reference numeral 590 is used. A plurality of sub-control board terminals 590 is provided for each mounting chamber 65. The plurality of sub-control board terminals 590 are electrically connected to the sub-control unit 50 via wiring on the sub-control board 500. The sub-control unit 50 is configured as, for example, a carriage circuit, and cooperates with the main control unit 40 shown in FIG. 2 to perform control related to the liquid storage container 100.

[0061] The liquid storage container 100 is attached to the attachment portion 4 of the printing device 20 by being inserted in the attachment direction MD. The liquid storage container 100 is removed from the storage portion 4 by being pulled out in the direction opposite to the attachment direction MD. In this way, the liquid storage container 100 is detachably attached to the printing device 20. When the liquid storage container 100 is attached to the storage portion 4, the device 130 is electrically connected to the main control unit 40 via the terminal 290, the connection mechanism 400, the sub-control board 500, and the bus 46 shown in FIG. 2 .

[0062] As shown in FIGS. 7B and 7C, the connection mechanism 400 includes a terminal holding portion 405 and a plurality of contact portion-forming members 403 held by the terminal holding portion 405. A connection mechanism 400 is provided for each of the liquid storage containers 100A to 100D, i.e., for each mounting chamber 65. As shown in FIG. 7B, the terminal holding portion 405 has a plurality of slits 301. The contact portion-forming members 403 are conductive and elastic. The contact portion-forming members 403 are fitted into the slits 301. In this embodiment, five contact portion-forming members 403 are provided for each connection mechanism 400, the same number as the number of terminals 290. As shown in FIG. 7B, when the five contact portion-forming members 403 are to be distinguished from one another, the reference numerals "403A," "403B," "403C," "404D," and "404E" are used. In this embodiment, nine slits 301 are provided in the connection mechanism 400 and are arranged at regular intervals, but the number may be the same as the number of contact portion forming members 403 .

[0063] As shown in FIG. 7C , the contact-portion-forming member 403 is a member that electrically connects the terminal 290 of the liquid container 100 and the sub-control board terminal 590 of the sub-control board 500. The portion of the contact-portion-forming member 403 that faces the mounting chamber 65 forms the device-side terminal 490. The device-side terminal 490 includes a contact portion dcp of the device-side terminal 490 that is to come into contact with the terminal 290. In this embodiment, the portion of the contact-portion-forming member 403 that faces most toward the mounting chamber 65, i.e., the portion that protrudes most toward the mounting chamber 65, comes into contact with the terminal 290 and forms the contact portion dcp of the device-side terminal 490. The contact portion dcp of the device-side terminal 490 is not limited to this embodiment. For example, the terminal 290 may come into contact with a portion of the device-side terminal 490 other than the portion that protrudes most toward the mounting chamber 65. The portion of contact portion forming member 403 that protrudes toward sub-control board 500 forms relay terminal 439 that comes into contact with sub-control board terminal 590 .

[0064] When the device-side terminals 490 are used to distinguish them, the reference symbols "410," "420," "430," "440," and "450" ​​are used. When the relay terminals 439 are used to distinguish them, the reference symbols "431," "432," "433," "434," and "435" are used. The device-side terminals 410 and the relay terminals 431 are formed on the contact-part forming member 403A. The device-side terminals 420 and the relay terminals 432 are formed on the contact-part forming member 403B. The device-side terminals 430 and the relay terminals 433 are formed on the contact-part forming member 403C. The device-side terminals 440 and the relay terminals 434 are formed on the contact-part forming member 403D. The device-side terminals 450 and the relay terminals 435 are formed on the contact-part forming member 403E. The device side terminal 410 is also called a device side data terminal, the device side terminal 420 is also called a device side clock terminal, the device side terminal 430 is also called a device side power terminal, the device side terminal 440 is also called a device side reset terminal, and the device side terminal 450 is also called a device side ground terminal.

[0065] The contact portion forming member 403A electrically connects the data terminal 210 and the sub-control board terminal 510. The device side terminal 410 contacts the data terminal 210, and the relay terminal 431 contacts the sub-control board terminal 510. The contact portion forming member 403B electrically connects the clock terminal 220 and the sub-control board terminal 520. The device side terminal 420 contacts the clock terminal 220, and the relay terminal 432 contacts the sub-control board terminal 520. The contact portion forming member 403C electrically connects the power supply terminal 230 and the sub-control board terminal 530. The device side terminal 430 contacts the power supply terminal 230, and the relay terminal 433 contacts the sub-control board terminal 530. The contact portion forming member 403D electrically connects the reset terminal 240 and the sub-control board terminal 540. The device-side terminal 440 contacts the reset terminal 240, and the relay terminal 434 contacts the sub-control board terminal 540. The contact portion forming member 403E electrically connects the ground terminal 250 and the sub-control board terminal 550. The device-side terminal 450 contacts the ground terminal 250, and the relay terminal 435 contacts the sub-control board terminal 550.

[0066] When the liquid storage container 100 is attached to the storage unit 4, the terminals 210, 220, 230, 240, and 250 come into contact with the device-side terminals 410, 420, 430, 440, and 450, thereby becoming electrically connected. The device-side terminals 410, 420, 430, 440, and 450 of the connection mechanism 400 come into contact with the sub-control board terminal 590 on the sub-control board 500, thereby becoming electrically connected. The sub-control board terminal 590 of the sub-control board 500 is electrically connected to the sub-control unit 50 by wiring. As a result, the terminals 210, 220, 230, 240, and 250 are electrically connected to the sub-control unit 50.

[0067] The positional relationship between each contact portion cp in the liquid container 100 and the positional relationship between each contact portion cp and other elements, such as the first virtual line C1, also applies to the contact portions dcp of the device-side terminals 410-450. The arrangement of each contact portion cp in the liquid container 100 and the arrangement of the contact portion dcp of the device-side terminal 490 are mirror images. As shown in FIG. 7B , the contact portion dcp of the device-side data terminal 410 is also referred to as a device-side data contact portion dcpd. The contact portion dcp of the device-side clock terminal 420 is also referred to as a device-side clock contact portion dcpc. The contact portion dcp of the device-side power supply terminal 430 is also referred to as a device-side power supply contact portion dcpvd. The contact portion dcp of the device-side reset terminal 440 is also referred to as a device-side reset contact portion dcpr. The contact portion dcp of the device-side ground terminal 450 is also referred to as a device-side ground contact portion dcpvs.

[0068] As shown in Figure 7B, the connection mechanism 400 is viewed from above. Two perpendicular straight lines are defined as a first virtual line C1 and a second virtual line C2. In Figure 7B, the first virtual line C1 is oriented along the first direction FD, and the second virtual line C2 is oriented along the second direction SD. In this embodiment, the two perpendicular straight lines that are substantially along the surface of the terminal holder 405 are defined as the first virtual line C1 and the second virtual line C2.

[0069] It is assumed that the contact portions dcp of all device-side terminals of the connection mechanism 400 are projected onto the second virtual line C2. In this embodiment, it is assumed that the device-side data contact portion dcpd corresponding to the data terminal 210, the device-side clock contact portion dcpc corresponding to the clock terminal 220, the device-side power contact portion dcpvd corresponding to the power terminal 230, the device-side reset contact portion dcpr corresponding to the reset terminal 240, and the device-side ground contact portion dcpvs corresponding to the ground terminal 250 are projected onto the second virtual line C2. Regarding the projection positions of the contact portions dcp of the device-side terminals, the projection position of the device-side data contact portion dcpd is defined as swd, the projection position of the device-side clock contact portion dcpc is defined as swc, the projection position of the device-side power contact portion dcpvd is defined as swvd, the projection position of the device-side reset contact portion dcpr is defined as swr, and the projection position of the device-side ground contact portion dcpvs is defined as swvs. Each projection position swd, swc, swvd, swr, and swvs is an orthogonal projection of the contact portion dcp of each device-side terminal projected perpendicularly onto the second virtual line C2. At this time, the contact portions dcp of all device-side terminals are projected at different positions. The device-side data contact portion dcpd, the device-side clock contact portion dcpc, the device-side power contact portion dcpvd, the device-side reset contact portion dcpr, and the device-side ground contact portion dcpvs are projected at different positions. The device-side data contact portion dcpd, the device-side clock contact portion dcpc, the device-side power contact portion dcpvd, the device-side reset contact portion dcpr, and the device-side ground contact portion dcpvs are arranged so that the respective virtual lines along the first virtual line C1 passing through the contact portions dcp of each device-side terminal are parallel without overlapping or intersecting each other. Furthermore, at this time, the first virtual line C1 passes through the midpoint MP between the two farthest projection positions of the contact portions dcp of all device-side terminals. In this embodiment, the first virtual line C1 passes through the midpoint MP between the projection position swvs of the device side ground contact part dcpvs and the projection position swd, swc, swvd, swr of the device side data contact part dcpd, device side clock contact part dcpc, device side power contact part dcpvd, and device side reset contact part dcpr that is located farthest from the projection position swvs of the device side ground contact part dcpvs.In this embodiment, the first virtual line C1 passes through the middle between the projection position swc of the device-side clock contact portion dcpc and the projection position swvs of the device-side ground contact portion dcpvs.

[0070] With respect to the first virtual line C1, one region of the connection mechanism 400 is referred to as a first region Rg1, and the other region of the connection mechanism 400 is referred to as a second region Rg2. In this case, the device-side terminals 410, 420, 430, and 440 are arranged in the first region Rg1, and the device-side terminal 450 is arranged in the second region Rg2. In this embodiment, the first region Rg1 is an area on the -X direction side, which is the negative direction of the second direction SD, of the first virtual line C1, and the second region Rg2 is an area on the +X direction side, which is the positive direction of the second direction SD, of the first virtual line C2. The first region Rg1 is also one region of the connection mechanism 400 sandwiched between the first virtual line C1, and the second region Rg2 is also the other region of the connection mechanism 400 sandwiched between the first virtual line C1. Of all the device-side terminal contacts dcp, some contacts dcpa ​​are arranged in the first region Rg1, and the remaining contacts dcpb are arranged in the second region Rg2. The some contacts dcpa ​​arranged in the first region Rg1 include device-side data contacts dcpd, device-side clock contacts dcpc, device-side power contacts dcpv, and device-side reset contacts dcpr. The remaining contacts dcpb arranged in the second region Rg2 include device-side ground contacts dcpvs. On one side of the first virtual line C1, the device-side clock contacts dcpc, device-side data contacts dcpd, device-side reset contacts dcpr, and device-side power contacts dcpvd are arranged, and on the other side, the device-side ground contact dcpvs is arranged. The some contacts dcpa ​​and the remaining contacts dcpb are arranged asymmetrically with respect to the first virtual line C1. No device-side terminal contacts dcp are provided on the first virtual line C1.

[0071] As shown in Figure 7B, the device-side ground contact dcpvs is located at the end of the contacts dcp of the multiple device-side terminals in the +X direction, which is the positive direction of the second direction SD. Of the device-side clock contact dcpc, the device-side data contact dcpd, the device-side power contact dcpvd, and the device-side reset contact dcpr, the contact dcp of any one device-side terminal is located at the end of the contacts dcp of the multiple device-side terminals in the -X direction, which is the negative direction of the second direction SD. The contact dcp of this any one device-side terminal is located at the end of the contacts dcp of the multiple device-side terminals in one direction SD. The device-side ground contact dcpvs is located at the end of the contacts dcp of the multiple device-side terminals in the other direction SD. In the first region Rg1, among the contact portions dcp of the device side terminal excluding the device side ground contact portion dcpvs, the distance in the direction along the second virtual line C2 between the contact portion dcp that is projected at the position farthest from the projection position swvs when projected onto the second virtual line C2 and the device side ground contact portion dcpvs provided in the second region Rg2 is Wa.

[0072] The device-side data contact dcpd, the device-side clock contact dcpc, the device-side power contact dcpd, and the device-side reset contact dcpr are preferably arranged away from the device-side ground terminal contact dcpvs. For example, in the first region Rg1, among the contacts dcp of the device-side terminal 490 excluding the device-side ground contact dcpvs, the distance in the direction along the second virtual line C2 between the contact dcp that is projected to a position closest to the projection position swvs when projected onto the second virtual line C2 and the device-side ground contact dcpvs provided in the second region Rg2 is Wa / 2 or more. For example, in the first region Rg1, among the contact portions dcp of the device-side terminals excluding the device-side ground contact portion dcpvs, there is no contact portion dcp of another device-side terminal between the contact portion dcp of the device-side terminal that is projected closest to the projection position swvs when projected onto the second virtual line C2 and the device-side ground contact portion dcpvs provided in the second region Rg2. In this embodiment, there is no contact portion dcp of another device-side terminal in the region between the device-side reset contact portion dcpr provided at the extreme end of the first region Rg1 in the +X direction, which is the positive direction of the second direction SD, and the device-side ground contact portion dcpvs provided in the second region Rg2. For example, the contact portions dcp and device-side ground contact portions dcpvs of the device-side terminals 410 to 440 are not provided on the first virtual line C1.

[0073] Between the projection position swd of the device-side data contact portion dcpd and the projection position swvs of the device-side ground contact portion dcpvs, the contact portion dcp of at least one device-side terminal among the device-side clock contact portion dcpc, the device-side power contact portion dcpvd, and the device-side reset contact portion dcpr is arranged to be projected. Preferably, between the projection position swd of the device-side data contact portion dcpd and the projection position swvs of the device-side ground contact portion dcpvs, the contact portions dcp of any two or more device-side terminals among the device-side clock contact portion dcpc, the device-side power contact portion dcpvd, and the device-side reset contact portion dcpr are arranged to be projected.

[0074] The device-side data terminal dcpd is arranged so as to be projected between the projection positions of the contact portions dcp of any two device-side terminals among the device-side clock contact portion dcpc, the device-side power contact portion dcpvd, and the device-side reset contact portion dcpr. The device-side data contact portion dcpd is not the contact portion projected to the extreme end on the second virtual line C2. In this embodiment, the device-side data contact portion dcpd is arranged so as to be projected between the projection positions of the device-side clock contact portion dcpc and the device-side power contact portion dcpvd.

[0075] The device-side data contact portion dcpd and the device-side reset contact portion dcpr are arranged so as to be projected between the projection position swvd of the device-side power contact portion dcpvd and the projection position swc of the device-side clock contact portion dcpc. The device-side reset contact portion dcpr is arranged so that its projection position swr is adjacent to the projection position swvd of the device-side power contact portion dcpvd. In this embodiment, the device-side data contact portion dcpd is arranged so as to be projected between the projection position swvd of the device-side power contact portion dcpvd and the projection position swc of the device-side clock contact portion dcpc.

[0076] The device-side power contact dcpr is arranged so that its projection position swvd is adjacent to the projection position swd of the device-side data contact dcpd.

[0077] In this embodiment, the device-side clock contact dcpc is arranged so as to be projected at a position farthest from the projection position swvs of the device-side ground contact dcpvs. The device-side data contact dcpd, the device-side power contact dcpvd, and the device-side reset contact dcpr are arranged so as to be projected in order in a direction from the projection position swc of the device-side clock contact dcpc on the second virtual line C2 toward the projection position swvs of the device-side ground contact dcpvs. The device-side clock contact dcpc is located at the extreme end in the negative X direction of the second direction SD. The contacts dcp of the device-side terminals other than the device-side clock contact dcpc are arranged in the following order, from the negative -X direction of the second direction SD toward the positive +X direction. The contact portions dcp of the multiple device side terminals are arranged so that their respective projection positions are, from the -X direction to the +X direction, in the order of device side clock contact portion dcpc, device side data contact portion dcpd, device side power supply contact portion dcpvd, device side reset contact portion dcpr, and device side ground contact portion dcpvs.

[0078] The device-side clock contact dcpc, device-side data contact dcpd, device-side power contact dcpvd, device-side reset contact dcpr, and device-side ground contact dcpvs are arranged to form multiple columns. The multiple columns are parallel to the second virtual line C2 and perpendicular to the first virtual line C1. In this embodiment, the contacts dcp of the multiple device-side terminals are arranged to form two columns perpendicular to the first direction FD, and the two columns are parallel to the second direction SD. The two columns are aligned along the first virtual line C1, which in this embodiment is the first direction FD. The two columns are referred to as the first column R1 and the second column R2. The first column R1 is formed by the device-side clock contact dcpc, device-side power contact dcpvd, and device-side ground contact dcpvs. The second column R2 is formed by the device-side data contact dcpd and device-side reset contact dcpr. The device-side data contacts dcpd and device-side reset contacts dcpr that form the second row R2, and the device-side clock contacts dcpc, device-side power contacts dcpvd, and device-side ground contacts dcpvs that form the first row R1, are arranged alternately so that the contacts dcp are not aligned in the direction of the first virtual line C1, forming a so-called staggered arrangement. When projected onto the second virtual line C2, the contacts dcp of two adjacent device-side terminals form different rows. The device-side data contacts dcpd and the device-side ground contacts dcpvs are arranged in different rows. The contacts dcp of any of the device-side terminals, the device-side clock contacts dcpc, device-side power contacts dcpvd, and device-side reset contacts dcpr, are arranged so that they are projected between the projection position swd of the device-side data contact dcpd and the projection position swvs of the device-side ground contact dcpvs. In this embodiment, the device-side reset contact dcpr and the device-side power contact dcpvd are arranged so as to project between the projection position swd of the device-side data contact dcpd and the projection position swvs of the device-side ground contact dcpvs. In this embodiment, the contact portions dcp of each device-side terminal 410-450 are arranged to form a first row R1 and a second row R2, but this is not limiting. For example, the contact portions dcp of each device-side terminal 410-450 may be arranged to form three or four rows.A row can also be formed by the contact portion dcp of one device-side terminal.

[0079] The distance between the device side ground contact dcpvs and the device side reset contact dcpr is defined as distance DAn. The distance between the device side data contact dcpd and the device side clock contact dcpc is defined as distance DBn. ​​The distance between the device side data contact dcpd and the device side ground contact dcpvs is defined as distance DCn. The distance between the device side data contact dcpd and the device side reset contact dcpr is defined as distance DDn. The distance between the device side data contact dcpd and the device side power contact dcpvd is defined as DEn. In this embodiment, distance DCn is longer than distance DBn. ​​Distance DCn is longer than distance DEn. Distance DCn is longer than distance DDn. In this embodiment, distance DBn and distance DEn are the same. The distances between the device-side data contact dcpd and the contact dcp of the device-side terminal farthest from the device-side data contact dcpd among the contacts dcp of the multiple device-side terminals excluding the device-side ground contact dcpvs are distances DBn and DEn. In this case, distance DAn is longer than distance DBn and distance DEn.

[0080] The imaginary line segment connecting the device-side clock contact dcpc and the device-side data contact dcpd is defined as the first line segment fL, the imaginary line segment connecting the device-side reset contact dcpr and the device-side data contact dcpd is defined as the second line segment sL, and the imaginary line segment connecting the device-side power contact dcpvd and the device-side data contact dcpd is defined as the third line segment tL. On the first line segment fL, there are no contacts dcp of device-side terminals other than the device-side clock contact dcpc and the device-side data contact dcpd. On the second line segment sL, there are no contacts dcp of device-side terminals other than the device-side reset contact dcpr and the device-side data contact dcpd. On the third line segment tL, there are no contacts dcp of device-side terminals other than the device-side power contact dcpvd and the device-side data contact dcpd.

[0081] The data terminal 210 can also be called a first terminal. The clock terminal 220 can also be called a second terminal included in the other terminals. The reset terminal 240 can also be called a third terminal included in the other terminals. The power terminal 230 can also be called a fourth terminal included in the other terminals. The ground terminal 250 can also be called a fifth terminal included in the other terminals. The data contact portion cpd can also be called a first contact portion. The clock contact portion cpc can also be called a second contact portion. The reset contact portion cpr can also be called a third contact portion. The power contact portion cpvd can also be called a fourth contact portion. The ground contact portion cpvs can also be called a fifth contact portion. Terminals other than the first terminal can also be called a group of other terminals. Terminals provided on the substrate 120 or the liquid storage container 100, such as terminals 210 to 250, can also be called substrate-side terminals or container-side terminals.

[0082] The device-side terminal 410 can also be called the first device-side terminal. The device-side terminal 420 can also be called the second device-side terminal. The device-side terminal 430 can also be called the third device-side terminal. The device-side terminal 440 can also be called the fourth device-side terminal. The device-side terminal 450 can also be called the fifth device-side terminal. The projection position of the first device-side terminal 410 can also be called the first projection position. The projection position of the second device-side terminal 420 can also be called the second projection position. The projection position of the third device-side terminal 430 can also be called the third projection position. The projection position of the fourth device-side terminal 440 can also be called the fourth projection position. The projection position of the fifth device-side terminal 450 can also be called the fifth projection position.

[0083] A2. Explain the different states of the printing system: In this disclosure, the "attachment complete state" refers to a state in which the liquid container 100 is attached to the printing device 20 and no short circuit has occurred between the terminals 290. As described above, in this disclosure, "the liquid container 100 is attached to the printing device 20" refers to a state in which the liquid container 100 is physically attached to the printing device 20 and the contact portion cp of the terminal 290 is electrically connected to the device-side terminal 490. The attachment complete state is a state in which communication is possible between the printing device 20 and the device 130. The "not attached complete state" refers to a state in which the liquid container 100 is not attached to the container unit 4 of the printing device 20, or a state in which the liquid container 100 is attached to the container unit 4 of the printing device 20 but there is poor contact between the device-side terminal 490 and the contact portion cp. The "short circuit state" refers to a state in which the liquid container 100 is attached to the container unit 4 of the printing device 20 but there is a short circuit between the terminals 290. For example, when the data terminal 210 and the clock terminal 220 are short-circuited, it is said that "the data terminal 210 and the clock terminal 220 are in a short-circuited state."

[0084] The "connection state" refers to any one of (i) a fully attached state, (ii) a non-attached state, and (iii) a short-circuited state. The "determination of the connection state" refers to determining which of the above-mentioned states (i) to (iii) the liquid storage container 100 is in.

[0085] A3. Electrical and software configuration: A3-1. Electrical configuration: FIG. 8 is a diagram schematically illustrating the electrical configuration of the printing system 1000. In FIG. 8, the substrates 120 and devices 130 of the four liquid containers 100A, 100B, 100C, and 100D are distinguished by adding the suffixes "A," "B," "C," and "D." Each of the devices 130A to 130D stores identification information for the liquid containers 100A to 100D. For example, each of the devices 130A to 130D stores information about the liquid contained in the liquid containers 100A to 100D. The identification information is represented by ID=1 to ID=4 in FIG. 8. The main control unit 40 and the sub-control unit 50 constitute a control unit 39 that controls the operation of the printing device 20.

[0086] The sub-controller 50 and the liquid containers 100A-100D are electrically connected by a plurality of lines. The plurality of lines includes a reset line LRST, a clock line LSCK, a power line LVDD, a data line LSDA, and a ground line LVSS. The reset line LRST, the clock line LSCK, the power line LVDD, and the data line LSDA are provided independently for each of the liquid containers 100A-100D. The ground line LVSS is provided in common to all of the liquid containers 100A-100D. When distinguishing between the reset line LRST, the clock line LSCK, the power line LVDD, and the data line LSDA that are electrically connected to the corresponding liquid containers 100A-100D, the numbers "1" to "4" are added to the end of the names. These "1" to "4" correspond to the identification information "1" to "4" of the liquid containers 100A-100D.

[0087] In the sub-controller 50, the terminal that outputs the reset signal RST is referred to as the host terminal HRST, the terminal that outputs the clock signal SCK is referred to as the host terminal HSCK, the terminal that outputs the power supply voltage VDD is referred to as the host terminal HVDD, and the terminal that outputs and inputs the data signal SDA is referred to as the host terminal HSDA. The host terminal HVSS is grounded. When distinguishing between the terminals connected to the corresponding liquid containers 100A-100D, the host terminals HSDA, HRST, HSCK, and HVDD are suffixed with "1" to "4." These "1" to "4" correspond to the identification information "1" to "4" of the liquid containers 100A-100D. The sub-controller 50 and the main controller 40 are electrically connected via a bus 46. The sub-controller 50 individually transmits various signals and voltages to the devices 130A-130D of the liquid containers 100A-100D via a connection bus 45 including lines LRST, LSCK, LVDD, LSDA, and LVSS.

[0088] The reset line LRST is a conductive line used by the control unit 39 to send a reset signal RST to the device 130. The reset signal RST is a signal that puts the device 130 into a state where it can accept a request signal RS, which will be described later. When the reset signal RST sent by the control unit 39 to the device 130 changes from high level to low level, the part of the processing unit 136 that accepts the request signal RS is initialized, and when the reset signal RST changes from low level to high level, it becomes able to accept a new request signal RS. The clock line LSCK is a conductive line used by the control unit 39 to send a clock signal SCK to the device 130. The clock signal SCK is a signal that alternates between low level and high level at a predetermined cycle. The data line LSDA is a conductive line used to send and receive a data signal SDA between the control unit 39 and the device 130. The data signal SDA is sent and received in synchronization with the clock signal SCK to synchronize the control unit 39 and the device 130. For example, the data signal SDA is sent and received using the rising or falling edge of the clock signal SCK as a trigger. The reset signal RST, data signal SDA, and clock signal SCK are either high or low. Hereinafter, a high level will also be represented by the symbol "H" or "1," and a low level will also be represented by the symbol "L" or "0." The host terminal HSDA connected to the data line LSDA is grounded via a pull-down resistor within the sub-controller 50. As a result, when the data signal SDA is not being transmitted or received between the sub-controller 50 and the device 130, the drive state of the host terminal HSDA of the sub-controller 50 is maintained at a low level.

[0089] The ground line LVSS is a conductive line that determines the ground potential VSS of the device 130. The ground potential VSS is set to, for example, 0 V. The power supply line LVDD is a conductive line used by the control unit 39 to supply a power supply voltage VDD, which serves as an operating voltage, to the device 130. The power supply voltage VDD is a voltage higher than a predetermined threshold. In this embodiment, the power supply voltage VDD is set to a potential of, for example, about 3.3 V relative to the ground potential VSS. Note that the potential used for the power supply voltage VDD may be different depending on the type of device 130.

[0090] FIG. 9 is a diagram showing the functional configuration of the printing device 20 together with one liquid container 100. The printing device 20 includes a display panel 495, a power supply 441, a main control unit 40, and a sub-control unit 50. The display panel 495 is used to notify the user of the operating status of the printing device 20, errors in the liquid containers 100A-100D, ink consumption amounts stored in the device 130, ink colors, and manufacturing dates. When the liquid container 100 is in an installation-completed state, the display panel 495 displays, for example, a message informing the user that the liquid container 100 has been installed, a message that the printing system 1000 is ready to print, and a message indicating the amount of ink remaining in the liquid container 100. The display panel 495 is provided, for example, in the operation unit 70 shown in FIG. 2. The power supply 441 is a typical power supply used in logic circuits and has a rated voltage of 3.3 V. The voltage of the power supply 441 is supplied to the sub-controller 50 and also to other circuits as required.

[0091] The main control unit 40 has a CPU 415 and an apparatus-side first storage unit 416. The CPU 415 controls the operation of the printing device 20 by executing various programs stored in the apparatus-side first storage unit 416. For example, the main control unit 40 controls the operation of the display panel 495 and the operation of the sub-control unit 50. The CPU 415 functions as a determination unit 411 by executing various programs stored in the apparatus-side first storage unit 416. The determination unit 411 has an attachment determination unit 412 and a short-circuit determination unit 414. The attachment determination unit 412 determines whether or not the liquid storage container 100 is attached. The short-circuit determination unit 414 determines whether or not a short circuit has occurred between the terminals 290. The sub-controller 50 comprises a switching unit 511 and a device-side second memory unit 516. The switching unit 511 is composed of a register (not shown) and an analog switch (not shown) connected to the register. When the CPU 415 writes "1" to the register, the analog switch becomes conductive. This switches the CPU 415 and the board 120 to a connected state. When the CPU 415 writes "0" to the register, the analog switch becomes non-conductive. This switches the CPU 415 and the board 120 to a disconnected state.

[0092] The device-side second storage unit 516 stores determination information. The determination information is information used in the connection state determination process described below. The determination information is information in which the voltage output from the data terminal 210 in response to a request signal RS described below is used as a detection value. The determination unit 411 reads out the determination information from the device-side second storage unit 516 when executing the connection state determination process.

[0093] The sub-controller 50 transmits a request signal RS to each of the devices 130A-130D of the liquid containers 100A-100D via the connection bus 45. The request signal RS is output from the host terminal HSDA of the sub-controller 50 and input to each of the data terminals 210 of the liquid containers 100A-100D. The request signal RS includes a command that can identify, for each of the devices 130A-130D, the liquid containers 100A-100D that are to respond to the request signal RS. The determination unit 411 performs processing to determine the connection status of the liquid containers 100A-100D using the voltage output from each of the data terminals 210 of the liquid containers 100A-100D in response to the request signal RS. The request signal RS will be described in detail later.

[0094] The processing unit 136 of the device 130 communicates with the printing device 20 via the data line LSDA in synchronization with the clock signal SCK input from the printing device 20 to the clock terminal 220. For example, signals are transmitted and received triggered by the rising or falling edge of the clock signal SCK. The processing unit 136 controls signals and voltages input and output to and from the terminals 210 to 250. For example, it outputs response signals FS and SS to the data terminal 210 via the data line LSDA in response to a request signal RS. The processing unit 136 includes a three-state buffer. The three-state buffer has three operating states: a state in which it outputs a low-level voltage, a state in which it outputs a high-level voltage, and a high-impedance state. The three-state buffer is connected to the data terminal 210. Therefore, in this disclosure, the terms "low level," "high level," and "high impedance" are used to indicate the operating states of the data terminal 210. The storage unit 138 is configured as a memory cell array in which multiple memory cells are arranged in a two-dimensional matrix. The processing unit 136 and the storage unit 138 are connected by bit lines and word lines. The processing unit 136 is electrically connected to each of the terminals 210 to 250 and the storage unit 138.

[0095] A3-2. Software configuration (connection status determination process) overview: 10A and 10B, a description will be given of the connection status determination process executed by the printing system 1000. Fig. 10A is a flowchart of the connection status determination process executed by the printing device 20. Fig. 10B is a flowchart of the connection status determination process executed by the device 130.

[0096] As shown in FIG. 10A, in the connection status determination process, the printing device 20 executes the following process. In step S301, the sub-controller 50 sends a request signal RS to the device 130 of the liquid container 100. Thereafter, the sub-controller 50 detects the voltage output from the data terminal 210 of the liquid container 100. Specifically, in step S302, the sub-controller 50 detects the voltage output from the data terminal 210 of the liquid container 100 at a predetermined first timing t1. In step S303, the sub-controller 50 detects the voltage output from the data terminal 210 of the liquid container 100 at a predetermined second timing t2. In step S304, the sub-controller 50 detects the voltage output from the data terminal 210 of the liquid container 100 at a predetermined third timing t3. The first timing t1 to the third timing t3 are all different timings. The voltages detected by the sub-controller 50 at the first timing t1 to the third timing t3 are stored as detection values ​​in the device-side second memory unit 516 of the sub-controller 50. In step S305, the determination unit 411 of the main controller 40 reads the detection values ​​from the device-side second memory unit 516. In step S306, the main controller 40 determines the connection state based on the detection values ​​detected by the sub-controller 50 at the first timing t1 to the third timing t3.

[0097] As shown in FIG. 10B , in the connection status determination process, the device 130 performs the following process. In step S101, the processing unit 136 of the device 130 determines whether a request signal RS has been input from the printing device 20 to the data terminal 210. If it is determined that a request signal RS has been input to the data terminal 210, in step S102 the processing unit 136 of the device 130 determines whether a response from the printing device 20 has been requested of the device 130. If it is determined that a response from the printing device 20 has been requested, in step S103 the processing unit 136 of the device 130 outputs a first response signal FS to the data terminal 210. After outputting the first response signal FS, in step S104 the processing unit 136 of the device 130 outputs a second response signal SS to the data terminal 210. The first response signal FS and the second response signal SS are output from the data terminal 210 to the printing device 20. If it is determined in step S102 that a response to the printing device 20 is not requested, the processing unit 136 of the device 130 ends the process.

[0098] The outline and output timing of the request signal RS, first response signal FS, and second response signal SS will be described with reference to FIGS. 11A to 11D. FIG. 11A is a timing chart showing when the printer 20 outputs the request signal RS to the data terminal 210. FIG. 11B is a timing chart showing when the device 130 outputs the first response signal FS and the second response signal SS to the data terminal 210. FIG. 11C is a diagram showing details of the first response signal FS. FIG. 11D is a diagram showing details of the second response signal SS. The timing chart of FIG. 11B is executed following the timing chart of FIG. 11A. In FIGS. 11A to 11D, "H" indicates that the signal is at a high level, and "L" indicates that the signal is at a low level. The dotted line indicates that the driving state of the terminal 290 is high impedance, and that no signal is being output from the terminal 290. The host terminal HSDA of the sub-controller 50 is grounded via a pull-down resistor. Therefore, the control unit 39 cannot distinguish between the state in which the terminal 290 is in a high-impedance state and no signal is being output from the terminal 290, and the state in which a low-level voltage is being output from the terminal 290. However, for example, by using a pull-up resistor connecting the data terminal 210 and the power supply terminal 230, it is possible to confirm that the data terminal 290 is in a high-impedance state. VDD, RST, SCK, and SDA1 to SDA4 shown in FIG. 11A and elsewhere represent signals or voltages transmitted and received via the corresponding lines LVDD, LRST, LSCK, and LSDA1 to LSDA4 through the corresponding terminal 290. Cycles D1 to D9 in the command period CMT, first response period RT1, and second response period RT2 represent unit periods in which the clock signal SCK alternates between low and high levels. The clock signal SCK in each unit period is called a "period."

[0099] 11A and 11B are executed with a predetermined timing as a trigger. Examples of predetermined timing include when the printing device 20 is started and the power supply 441 is turned on, when the liquid storage container 100 is replaced, when an instruction is received from the user, or when the printing device 20 is not printing and the carriage 30 is located at the home position. Below, an example will be described in which execution is triggered by the power supply 441 being turned on.

[0100] 11A, the control unit 39 first sets the power supply voltage VDD to a high level. After a predetermined time has elapsed since the power supply voltage VDD was set to a high level, the control unit 39 sets the reset signal RST from a low level to a high level. After setting the reset signal RST to a high level, the control unit 39 transmits a clock signal SCK to the device 130. After setting the reset signal RST to a high level, the control unit 39 transmits a request signal RS to the device 130. The request signal RS includes a first execution command BCC1, first identification data DB1, first parity data P1, a second execution command BCC2, second identification data DB2, and second parity data P2.

[0101] The request signal RS will be described in detail. After setting the reset signal RST to high level, the control unit 39 transmits a first execution command BCC1 to the devices 130A to 130D in cycles D1 and D2 of the command period CMT. The first execution command BCC1 is 2-bit data, and is a command that indicates that the main control unit 40 will execute a connection status determination process. The control unit 39 generates the first execution command BCC1 by setting the voltage to high level in cycle D1 and to low level in cycle D2.

[0102] Following the first execution command BCC1, the control unit 39 transmits first identification data DB1 to the devices 130A-130D in cycles D3-D8. The first identification data DB1 is 6-bit data and identifies the liquid containers 100A-100D for which a response is requested. In the first identification data DB1, a corresponding bit is assigned to each of the devices 130A-130D. The first bit, cycle D3, and the second bit, cycle D4, can be used in another embodiment when the printing device 20 is equipped with six liquid containers 100. In the first identification data DB1, the third bit, cycle D5, corresponds to the liquid container 100D, the fourth bit, cycle D6, corresponds to the liquid container 100C, the fifth bit, cycle D7, corresponds to the liquid container 100B, and the sixth bit, cycle D8, corresponds to the liquid container 100A. The first identification data DB1 transmitted to the device 130A of the liquid container 100A is at a high level at the sixth bit in cycle D8, and the remaining bits are at a low level. The first identification data DB1 transmitted to the device 130B of the liquid container 100B is at a high level at the fifth bit in cycle D7, and the remaining bits are at a low level. The first identification data DB1 transmitted to the device 130C of the liquid container 100C is at a high level at the fourth bit in cycle D6, and the remaining bits are at a low level. The first identification data DB1 transmitted to the device 130D of the liquid container 100D is at a high level at the third bit in cycle D5, and the remaining bits are at a low level. The request signal RS has a different waveform for each of the devices 130A to 130D of the liquid containers 100A to 100D.

[0103] After the first identification data DB1, the control unit 39 transmits the first parity data P1 to the devices 130A to 130D in cycle D9. The first parity data P1 is 1-bit data. In this embodiment, the first parity data P1 is odd parity.

[0104] After the first parity data P1, the control unit 39 transmits a 2-bit second execution command BCC2 to the devices 130A to 130D. The second execution command BCC2 is the same data as the first execution command BCC1 but without inverting it. After the second execution command BCC2, the control unit 39 transmits 6-bit second identification data DB2 to the devices 130A to 130D. The second identification data DB2 is the same data as the first identification data DB1 but without inverting it. After the second identification data DB2, the control unit 39 transmits 1-bit second parity data P2 to the devices 130A to 130D.

[0105] The first execution command BCC1, the first identification data DB1, and the first parity data P1 are collectively referred to as the first command. The second execution command BCC2, the second identification data DB2, and the second parity data P2 are collectively referred to as the second command. Within the command period CMT, the period during which the control unit 39 transmits the first command to the device 130 is also referred to as the first command period. Within the command period CMT, the period during which the control unit 39 transmits the second command to the device 130 is also referred to as the second command period. The first command and the second command are the same data that are not inverted. In other embodiments, the first command and the second command may be inverted relative to each other.

[0106] As described above, the device 130 first receives the power supply voltage VDD from the printing device 20 at the power supply terminal 230. After the power supply voltage VDD is input to the power supply terminal 230 from the printing device 20, the reset signal RST changes from a low reset voltage to a high reset voltage, causing the high reset voltage to be input to the reset terminal 240 from the printing device 20. After the high reset voltage is input to the reset terminal 240 from the printing device 20, the clock signal SCK is input to the clock terminal 220 from the printing device 20. After the high reset voltage is input to the reset terminal 240 from the printing device 20, the request signal RS is input to the data terminal 210 from the printing device 20. Here, the power supply voltage VDD is a voltage at a high level higher than a threshold. The reset signal RST is a signal that includes a low reset voltage at a low level and a high reset voltage at a high level higher than the low reset voltage. The low reset voltage is a voltage lower than the reference reset voltage as a threshold, and the high reset voltage is a voltage higher than the reference reset voltage as a threshold. The reference reset voltage is a voltage that serves as a reference for determining whether the voltage is high or low. The clock signal SCK is a signal in which a low clock voltage as a low level and a high clock voltage as a high level that is higher than the low clock voltage are alternately repeated at a predetermined period. The low clock voltage is a voltage lower than the reference clock voltage as a threshold, and the high clock voltage is a voltage higher than the reference clock voltage as a threshold. The reference clock voltage is a voltage that serves as a reference for determining whether the voltage is high or low. Each threshold is set, for example, between the potential of the power supply 441 and the ground potential.

[0107] As shown in FIG. 11B , after a request signal RS is transmitted from the control unit 39 to the device 130, the device 130, which has been requested to respond to the printing device 20, outputs a first response signal FS and a second response signal SS to the data terminal 210. The first response signal RT1 and the second response signal RT2 are signals used by the printing device 20 to determine whether the data terminal 210 is shorted to the clock terminal 220, the power supply terminal 230, and the reset terminal 240, and whether the liquid container 100 is attached to the printing device 20. The request signal RS has a waveform that individually specifies one of the liquid containers 100A-100D in the first identification data DB1. When the device 130A-130D receives a request signal RS from the printing device 20 that specifies the device, the device 130A-130D outputs a first response signal FS and a second response signal SS to the data terminal 210. The first response signal FS is output during a first response period RT1. The second response signal SS is output during a second response period RT2, which is the period following the first response period RT1.

[0108] During the first response period RT1, first, in cycles D1 and D2, the printer 20 executes a process for switching the direction of signals transmitted and received via the data line LSDA. After transmitting a request signal RS to the device 130, the control unit 39 sets the potential of the data line LSDA to 0V in cycle D1, thereby removing the charge from the data line LSDA. Then, in cycle D2, the control unit 39 sets the drive state of the host terminal HSDA of the sub-control unit 50 to high impedance. This enables the printer 20 to receive signals. Meanwhile, after receiving the request signal RS in synchronization with the clock signal SCK, the processing unit 136 of the device 130 sets the drive state of each data terminal 210 to high impedance in cycle D1. This is to prevent signals from being output from the data terminals 210 while the control unit 39 of the printer 20 is removing the charge from the data line LSDA. Similarly, in cycle D2, the processing unit 136 of the device 130 sets the drive state of the data terminals 210 to high impedance. The first two bits of this first response period RT1 also function as dummy bits to make the number of bits of the request signal RS and the signal of the first response period RT1 the same. The number of cycles of the clock signal SCK that constitutes the first response period RT1 is the same as the number of cycles of the clock signal SCK with which the request signal RS is synchronized.

[0109] Next, in cycles D3 to D8, the processing unit 136 of each device 130 outputs a first response signal FS to the data terminal 210 at a predetermined timing. The first response signal FS is output from a different processing unit 136A to 136D for each cycle of the clock signal SCK. The first response signal FS includes a low-level voltage. As shown in FIG. 11C, the first response signal FS is a signal that is output to the data terminal 210 while the clock signal SCK is at a high level. The first response signal FS is at a low level while the clock signal SCK is at a high level. When the voltage input to the clock terminal 220 changes from a low level to a high level, the processing unit 136 of the device 130 outputs a low-level voltage to the data terminal 210.

[0110] As described above, the first response signal FS includes a low first response voltage as a low level that is lower than the reference first response voltage as a threshold. The reference first response voltage is a voltage that serves as a reference for determining whether the signal is at a low level or a high level, and is set, for example, between the voltage of the power supply 441 and the voltage of the ground potential.

[0111] 11B, the first timing t1 is set to a period during which the clock signal SCK is at a high level in each of cycles D3 to D8 of the first response period RT1. The first timing t1 is set to a period during which the first response signal FS is at a low level. As shown in FIG. 11C, the device 130 outputs a low-level voltage to the data terminal 210 before the first timing t1 during a period during which the clock signal SCK is at a high level in one cycle of the clock signal SCK.

[0112] As shown in FIG. 11B, cycle D9 of the first response period RT1 functions as a dummy bit that makes the number of bits in the first command period and the first response period RT1 the same.

[0113] During the second response period RT2, as shown in FIG. 11B, the control unit 39 discharges the charge on the data line LSDA by setting the potential of the data line LSDA to 0V. In cycle D1, the processing unit 136 of the device 130 sets the drive state of the data terminal 210 to high impedance. In cycle D2, the processing unit 136 of the device 130 also sets the drive state of the data terminal 210 to high impedance. The first two bits of this second response period RT2 also function as dummy bits that make the number of bits of the request signal RS and the signal in the second response period RT2 the same. The number of cycles of the clock signal SCK that constitutes the second response period RT2 is the same as the number of cycles of the clock signal SCK with which the request signal RS is synchronized.

[0114] Next, in cycles D3 to D8, the processing unit 136 of each device 130 outputs a second response signal SS to the data terminal 210 at a predetermined timing. The second response signal SS is output from a different processing unit 136A to 136D for each cycle of the clock signal SCK. The second response signal SS includes a low-level voltage and a high-level voltage. As shown in FIG. 11D, the waveform of the second response signal SS is in the opposite phase to the waveform of the clock signal SCK input to the clock terminal 220. The second response signal SS includes a high level during a period when the clock signal SCK is at a low level, and includes a low level during a period when the clock signal SCK is at a high level.

[0115] As described above, the second response signal SS includes a low second response voltage as a low level and a high second response voltage as a high level higher than the low second response voltage. The low second response voltage is a voltage lower than the reference second response voltage as a threshold, and the high second response voltage is a voltage higher than the reference second response voltage as a threshold. The reference second response voltage is a voltage that serves as a reference for determining whether the signal is at a low level or a high level, and is set, for example, between the voltage of the power supply 441 and the voltage of the ground potential. The reference second response voltage may be the same as or different from the reference first response voltage. The waveform of the second response signal SS is different from the waveform of the first response signal FS.

[0116] As shown in FIG. 11B, the second timing t2 is set to a period during which the clock signal SCK is at a low level in each of cycles D3 to D8 of the second response period RT2. The second timing t2 is set to a period during which the second response signal SS is at a high level. The third timing t3 is set to a period during which the clock signal SCK is at a high level in each of cycles D3 to D8 of the second response period RT2. The third timing t3 is set to a period during which the second response signal SS is at a low level. As shown in FIG. 11D, the device 130 outputs a high-level voltage to the data terminal 210 before the second timing t2 during a period during which the clock signal SCK is at a low level in one cycle of the clock signal SCK. The device 130 outputs a low-level voltage to the data terminal 210 before the third timing t3 during a period during which the clock signal SCK is at a high level in one cycle of the clock signal SCK.

[0117] As shown in FIG. 11B, cycle D9 of the second response period RT2 functions as dummy bit data that makes the number of bits in the second command period and the second response period RT2 the same.

[0118] The output periods of the first response signal FS and the second response signal SS differ for each of the devices 130A to 130D of the liquid containers 100A to 100D. In this embodiment, the device 130 outputs the first response signal FS and the second response signal SS in one cycle of the clock signal SCK corresponding to the identification information. As shown in FIG. 11B, the liquid container 100A outputs the first response signal FS and the second response signal SS to the data terminal 210 in cycle D8 of each of the first response period RT1 and the second response period RT2. The liquid container 100B outputs the first response signal FS and the second response signal SS to the data terminal 210 in cycle D7 of each of the first response period RT1 and the second response period RT2. The liquid container 100C outputs the first response signal FS and the second response signal SS to the data terminal 210 in cycle D6 of each of the first response period RT1 and the second response period RT2. The liquid storage container 100D outputs a first response signal FS and a second response signal SS to the data terminal 210 in cycle D5 of each of the first response period RT1 and the second response period RT2.

[0119] As shown in FIG. 11B, when a clock signal SCK having a predetermined number of cycles is input to the clock terminal 220, the device 130 outputs a first response signal FS by switching the drive state of the data terminal 210 from high impedance to low level. For example, as shown in FIG. 11B, when the clock signal SCK is input to the clock terminal 220 in cycles D1 to D7 of the first response period RT1, the device 130A outputs the first response signal FS by switching the drive state of the data terminal 210 from high impedance to low level. The device 130 ends the output of the first response signal FS by switching the state of the data terminal 210 from low level to high impedance. For example, as shown in FIG. 11B, after outputting the first response signal FS in cycle D8 of the first response period RT1, the device 130A ends the output of the first response signal FS by switching the drive state of the data terminal 210 to high impedance.

[0120] As shown in FIG. 11B, when a clock signal SCK having a predetermined number of cycles is input to the clock terminal 220, the device 130 outputs the second response signal SS by switching the drive state of the data terminal 210 from high impedance to high level. For example, as shown in FIG. 11B, when the clock signal SCK is input to the clock terminal 220 in cycles D1 to D7 of the second response period RT2, the device 130 outputs the second response signal SS by switching the drive state of the data terminal 210 from high impedance to high level. The device 130 ends the output of the second response signal SS by switching the drive state of the data terminal 210 from low level to high impedance. For example, as shown in FIG. 11B, after outputting the second response signal FS in cycle D8 of the second response period RT2, the device 130A ends the output of the second response signal SS by switching the drive state of the data terminal 210 from low level to high impedance.

[0121] As described above, after a request signal RS is input to the data terminal 210, the device 130 outputs a first response signal FS to the data terminal 210, and after outputting the first response signal FS, outputs a second response signal SS to the data terminal 210. When the data terminal 210 is not short-circuited to the clock terminal 220, the power supply terminal 230, and the reset terminal 240, the device 130 performs the following. As shown in FIG. 11C , the device 130 outputs a low first response voltage to the data terminal 210 as a first expected value at a predetermined first timing t1 during a period in which the voltage input to the clock terminal 210 is a high clock voltage. As shown in FIG. 11D , after outputting the low first response voltage, the device 130 outputs a high second response voltage to the data terminal 210 as a second expected value at a second timing t2 during which the voltage input to the clock terminal 210 is a low clock voltage. As shown in FIG. 11D, after outputting the high second response voltage, device 130 outputs a low second response voltage to data terminal 210 as a third expected value at third timing t3 when the voltage input to clock terminal 210 is a high clock voltage.

[0122] The first response signal FS is configured at a low level. The low level of the first response signal FS indicates that there is no short circuit between the data terminal 210 and the terminals 220, 230, 240, and 250 other than the data terminal 210. The second response signal SS is configured at a high level and a low level. The high level of the second response signal SS indicates that the liquid storage container 100 is attached to the printing device 20. The low level of the second response signal SS indicates that there is no short circuit between the data terminal 210 and the terminals 220, 230, 240, and 250 other than the data terminal 210.

[0123] A3-3. Details of software configuration (connection status determination process): The connection state determination process executed by the main control unit 40 will be described with reference to FIG. 12. FIG. 12 is a diagram showing an overview of the connection state determination process executed by the main control unit 40. As shown in FIG. 12, the main control unit 40 determines the connection state using a combination of voltages output from the data terminal 210 of the liquid container 100 at the first timing t1 to the third timing t3. As explained above with reference to FIG. 11B, the first timing t1 to the third timing t3 are assigned to periods of cycles D5 to D8 corresponding to the liquid containers 100A to 100D. The expected value of the voltage output from the data terminal 210 of the liquid container 100 at each of the first timing t1 to the third timing t3 is the voltage output from the data terminal 210 when the liquid container 100 is in the fully attached state, and is low level at the first timing t1, high level at the second timing t2, and low level at the third timing t3. In the first case where the voltage output from the data terminal 210 of the liquid storage container 100 is the same as the expected value, the determination unit 414 of the main control unit 40 determines that the liquid storage container 100 is in a fully attached state and that a "container is present."

[0124] In the second case where the voltage output from the data terminal 210 of the liquid storage container 100 is at a low level at each of the first timing t1 to the third timing t3, the judgment unit 414 of the main control unit 40 judges that the liquid storage container 100 is in an unattached state and that there is no container.

[0125] In a third case where the voltage output from the data terminal 210 of the liquid container 100 is high at the first timing t1, low at the second timing t2, and high at the third timing t3, the determination unit 414 of the main control unit 40 determines that the data terminal 210 and the clock terminal 220 are short-circuited, and determines that a short circuit exists. When the data terminal 210 and the clock terminal 220 are short-circuited, the voltage at the data terminal 210 is approximately the same as the voltage at the clock terminal 220. Similar to the clock signal SCK in FIG. 11B, the voltage output from the data terminal 210 of the liquid container 100 is high at the first timing t1, low at the second timing t2, and high at the third timing t3. Thus, when the data terminal 210 and the clock terminal 220 are shorted out of the data terminal 210, the power terminal 230, the reset terminal 240, and the clock terminal 220, the signal output from the data terminal 210 connected to the device 130 to the control unit 39 of the printing device 20 at the first timing t1 to the third timing t3 is configured as follows: The voltage output from the data terminal 210 differs from the first expected value at the first timing t1, differs from the second expected value at the second timing t2, and differs from the third expected value at the third timing t3.

[0126] In a fourth case where the voltage output from the data terminal 210 of the liquid container 100 is at a high level at each of the first timing t1 to the third timing t3, the determination unit 414 of the main control unit 40 determines that at least one of the data terminal 210 and the power terminal 230 is shorted, or the data terminal 210 and the reset terminal 240 is shorted, and determines that a short circuit exists. When the data terminal 210 is shorted to the power terminal 230, or when the data terminal 210 is shorted to the reset terminal 240, the voltage at the data terminal 210 is approximately the same as the voltage at the power terminal 230 or the voltage at the reset terminal 240. As shown in FIG. 11B , during the first response period RT1 and the second response period RT2, the power terminal 230 and the reset terminal 240 are at a high level, and therefore the voltage output from the data terminal 210 of the liquid container 100 is at a high level at each of the first timing t1 to the third timing t3. Thus, when the data terminal 210 and the power terminal 230 are shorted or when the data terminal 210 and the reset terminal 240 are shorted among the data terminal 210, the power terminal 230, the reset terminal 240, and the clock terminal 220, the voltage output from the data terminal 210 connected to the device 130 to the control unit 39 of the printing device 20 at the first timing t1 to the third timing t3 is configured as follows: The signal output from the data terminal 210 differs from the first expected value at the first timing t1, is the same as the second expected value at the second timing t2, and differs from the third expected value at the third timing t3.

[0127] As described above, the printing device 20 first detects at a first timing t1 that there is no short circuit between the data terminal 210 and the terminals 220, 230, 240, and 250 other than the data terminal 210. Then, at a second timing t2, it detects that the liquid container 100 is attached to the printing device 20. Furthermore, at a third timing t3, it again confirms that there is no short circuit between the data terminal 210 and the terminals 220, 230, 240, and 250 other than the data terminal 210. By detecting the voltage output from the data terminal 210 at the first timing t1 to the third timing t3, it is confirmed that the liquid container 100 is in an attachment complete state. As will be described later, it is anticipated that a short circuit between the data terminal 210 and the other terminals 220, 230, and 240 may occur within the first response period RT1 and the second response period RT2. At the first timing t1 before the second timing t2 and at the third timing t3 after the second timing t2, it is detected that there is no short circuit between the data terminal 210 and the other terminals 220, 230, 240, 250, thereby accurately confirming that the liquid storage container 100 is in a fully attached state. In this way, the attachment detection mechanism for the liquid storage container 100 and the short-circuit detection mechanism between the terminals 290 are recognized as independent components.

[0128] When the printing device 20 detects that the data terminal 210 and the clock terminal 220 are not shorted, it must be able to distinguish between the voltage detected by the printing device 20 when the data terminal 210 and the clock terminal 220 are shorted and the voltage detected by the printing device 20 when the data terminal 210 and the clock terminal 220 are not shorted. One cycle of the clock signal SCK has a low-level period and a high-level period. If the device 130 outputs a voltage equivalent to a high level to the data terminal 210 during the low-level period in one cycle when the data terminal 210 and the clock terminal 220 are not shorted, then the device 130 will also output a voltage equivalent to a high level when the data terminal 210 and the clock terminal 220 are shorted. As a result, when the printing device 20 detects the output from the data terminal 210, it will be unable to distinguish whether the data terminal 210 and the clock terminal 220 are not shorted or whether the data terminal 210 and the clock terminal 220 are shorted. At first timing t1 to third timing t3, device 130 outputs a voltage different from the voltage of clock signal SCK to data terminal 210, which allows printing device 20 to distinguish between the voltage detected by the printing device when data terminal 210 and clock terminal 220 are shorted and the voltage detected by the printing device when data terminal 210 and clock terminal 220 are not shorted. The same applies when data terminal 210 and power terminal 230 are shorted and when data terminal 210 and reset terminal 240 are shorted.

[0129] Specific examples of the connection state determination process will be described with reference to Figures 13A to 20C. In the following first to ninth specific examples, a single liquid storage container 100A will be used as an example. In the second to ninth specific examples, the waveforms shown in Figures 13A to 20B schematically show examples of the voltage at the terminal 290 that is actually observed. The control unit 39 recognizes the voltage output from the data terminal 210 as either a high level or a low level based on a predetermined threshold value.

[0130] (First specific example) In the first specific example, a case where the liquid container 100A is in a fully attached state will be described. FIG. 13A is a first timing chart of the connection state determination process. FIG. 13B is a second timing chart of the connection state determination process. As shown in FIG. 13A, the sub-controller 50 transmits a request signal RS to the device 130A of the liquid container 100A during a command period CMT. The request signal RS transmitted to the device 130A specifies the target liquid container 100A, and the bit in cycle D8 is set to high level. As shown in FIG. 13B, in the fully attached state, the sub-controller 50 detects from the data terminal 210 a low level at a first timing t1 of cycle D8 in the first response period RT1, a high level at a second timing t2 of cycle D8 in the second response period RT2, and a low level at a third timing t3 of cycle D8 in the second response period RT2. In this case, the determining unit 421 of the main control unit 40 determines that the liquid storage container 100A is "container present" because the expected value and the detected value are the same at each of the first timing t1 to the third timing t3.

[0131] (Second specific example) In the second specific example, a connection state determination process will be described when a short circuit occurs between the data terminal 210 and the clock terminal 220. FIG. 14A is a third timing chart of the connection state determination process. FIG. 14B is a fourth timing chart of the connection state determination process. In FIG. 14A, assume that a short circuit occurs between the data terminal 210 and the clock terminal 220 of the liquid storage container 100A at timing ta before the command period CMT. As shown in FIG. 14B, the change in voltage output from the data terminal 210 is similar to the signal from the clock terminal 220. The sub-controller 50 detects a high level from the data terminal 210 at a first timing t1 of cycle D8 in the first response period RT1, a low level at a second timing t2 of cycle D8 in the second response period RT2, and a high level at a third timing t3 of cycle D8 in the second response period RT2. In this case, the data terminal 210 and the clock terminal 220 are short-circuited, and the determination unit 411 of the main control unit determines that a short circuit exists.

[0132] (Third Specific Example) In the third specific example, a connection state determination process will be described when a short circuit occurs between the data terminal 210 and the clock terminal 220. The third specific example differs from the second specific example in that a short circuit occurs between the data terminal 210 and the clock terminal 220 after the device 130 receives the request signal RT. FIG. 15 is a fifth timing chart of the connection state determination process. Assume that a short circuit occurs between the data terminal 210 and the clock terminal 220 of the liquid storage container 100A at timing tb in the first response period RT1. In this case, the signal output from the data terminal 210 is the same as the signal from the clock terminal 220. Therefore, the sub-control unit 50 detects a high level from the data terminal 210 at the first timing t1 of cycle D8 in the first response period RT1, a low level at the second timing t2 of cycle D8 in the second response period RT2, and a high level at the third timing t3 of cycle D8 in the second response period RT2. In this case, the data terminal 210 and the clock terminal 220 of the liquid storage container 100A are in a short-circuited state, and the determining unit 411 of the main control unit 40 determines that "a short circuit exists."

[0133] (Fourth Specific Example) The fourth specific example describes the connection state determination process when a short circuit occurs between the data terminal 210 and the power supply terminal 230. FIG. 16A is a sixth timing chart of the connection state determination process. FIG. 16B is a seventh timing chart of the connection state determination process. In FIGS. 16A and 16B, it is assumed that a short circuit occurs between the data terminal 210 and the power supply terminal 230 of the liquid storage container 100A at timing ta before the command period CMT. As shown in FIG. 16B, the change in voltage output from the data terminal 210 is the same as the signal from the power supply terminal 230. The sub-controller 50 detects a high level from the data terminal 210 at a first timing t1 of cycle D8 in the first response period RT1, a high level at a second timing t2 of cycle D8 in the second response period RT2, and a high level at a third timing t3 of cycle D8 in the second response period RT2. In this case, the data terminal 210 and the power terminal 230 of the liquid storage container 100A are in a short-circuited state, and the determining unit 411 of the main control unit 40 determines that "a short circuit exists."

[0134] (Fifth Specific Example) In the fifth specific example, a connection state determination process will be described when a short circuit occurs between the data terminal 210 and the power terminal 230. The fifth specific example differs from the fourth specific example in that a short circuit occurs between the data terminal 210 and the power terminal 230 after the device 130 receives the request signal RS. FIG. 17 is an eighth timing chart of the connection state determination process. Assume that a short circuit occurs between the data terminal 210 and the power terminal 230 of the liquid storage container 100A at timing tb in the first response period RT1. In this case, the signal output from the data terminal 210 is the same as the signal from the power terminal 230. Therefore, the sub-control unit 50 detects a high level from the data terminal 210 at the first timing t1 of cycle D8 in the first response period RT1, a high level at the second timing t2 of cycle D8 in the second response period, and a high level at the third timing t3 of cycle D8 in the second response period. In this case, the data terminal 210 and the power terminal 230 of the liquid storage container 100A are in a short-circuited state, and the determining unit 411 of the main control unit 40 determines that "a short circuit exists."

[0135] (Sixth Specific Example) In the sixth specific example, a connection state determination process will be described when a short circuit occurs between the data terminal 210 and the reset terminal 240. FIG. 18A is a ninth timing chart of the connection state determination process. FIG. 18B is a tenth timing chart of the connection state determination process. In FIGS. 18A and 18B, it is assumed that a short circuit occurs between the data terminal 210 and the reset terminal 240 of the liquid storage container 100A at timing ta before the command period CMT. As shown in FIG. 18B, the change in voltage output from the data terminal 210 is the same as the signal from the reset terminal 240. Therefore, the sub-controller 50 detects a high level from the data terminal 210 at a first timing t1 of cycle D8 in the first response period, a high level at a second timing t2 of cycle D8 in the second response period, and a high level at a third timing t3 of cycle D8 in the second response period. In this case, the data terminal 210 and the reset terminal 240 of the liquid storage container 100A are short-circuited, and the determination unit 411 of the main controller 40 determines that a short circuit exists.

[0136] (7th Specific Example) The seventh specific example describes a connection state determination process when a short circuit occurs between the data terminal 210 and the reset terminal 240. The seventh specific example differs from the sixth specific example in that a short circuit occurs between the data terminal 210 and the reset terminal 240 after the device 130 receives the request signal RS. FIG. 19 is an eleventh timing chart of the connection state determination process. Assume that a short circuit occurs between the data terminal 210 and the reset terminal 240 of the liquid storage container 100A at timing tb in the first response period RT1. In this case, the signal output from the data terminal 210 is the same as the signal from the reset terminal 240. Therefore, the sub-control unit 50 detects a high level from the data terminal 210 at a first timing t1 in cycle D8 in the first response period, a high level at a second timing t2 in cycle D8 in the second response period, and a high level at a third timing t3 in cycle D8 in the second response period. In this case, the data terminal 210 and the reset terminal 240 of the liquid storage container 100A are in a short-circuited state, and the determining unit 411 of the main control unit 40 determines that "a short circuit exists."

[0137] (Eighth Specific Example) The eighth specific example describes a case where the liquid container 100A is in an unattached state. More specifically, the eighth specific example describes a case where the liquid container 100A is removed from the container 4 before the device 130A receives the request signal RS. FIG. 20A is a twelfth timing chart of the connection state determination process. When the liquid container 100A is not attached to the container 4, the drive state of the host terminal HSDA1 of the sub-controller 50 is set to a low level by the connected pull-down resistor. Therefore, the sub-controller 50 detects a low level at a first timing t1 of cycle D8 in the first response period RT1, a low level at a second timing t2 of cycle D8 in the second response period RT2, and a low level at a third timing t3 of cycle D3 in the second response period RT2. In this case, the liquid container 100A is in an unattached state, and the determination unit 421 of the main controller 40 determines that the liquid container 100A is in an unattached state.

[0138] (9th Specific Example) In the ninth specific example, a case will be described in which the liquid storage container 100A is removed from the storage unit 4 in the middle of the first response period RT1. FIG. 20B is a timing chart of a thirteenth step of the connection state determination process. The sub-controller 50 detects a low level at a first timing t1 of cycle D8 in the first response period RT1, a low level at a second timing t2 of cycle D8 in the second response period RT2, and a low level at a third timing t3 of cycle D8 in the second response period RT2. In this case, the liquid storage container 100A is in the non-attachment complete state, and the determination unit 421 of the main controller 40 determines that the liquid storage container 100A is "container absent."

[0139] (Other specific examples) In other specific examples, various connection states and the determination results by the determination unit 421 for each connection state will be described. Fig. 20C is a diagram illustrating another specific example of the connection state determination process. In the connection state determination process, if at least one of the detected values ​​at the first timing t1 and the third timing t3 differs from the expected value, the determination unit 411 of the main control unit 40 determines that "a short circuit exists."

[0140] Case No. 1 occurs when the data terminal 210 and the clock terminal 220 are short-circuited at a timing t prior to the first timing t1. In this case, the board 120 outputs a high-level voltage different from the first expected value from the data terminal 210 to the printing device 20 at the first timing t1, a low-level voltage different from the second expected value at the second timing t2, and a high-level voltage different from the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit exists.

[0141] Case No. 2 occurs when the data terminal 210 and the clock terminal 220 are shorted during a period t between the first timing t1 and the second timing t2. In this case, the board 120 outputs a low-level voltage equal to the first expected value from the data terminal 210 to the printing device 20 at the first timing t1, a low-level voltage different from the second expected value at the second timing t2, and a high-level voltage different from the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit has occurred.

[0142] Case No. 3 occurs when the data terminal 210 and the clock terminal 220 are shorted during the timing t between after the second timing t2 and before the third timing t3. In this case, the board 120 outputs a low-level voltage equal to the first expected value from the data terminal 210 to the printing device 20 at the first timing t1, a high-level voltage equal to the second expected value at the second timing t2, and a high-level voltage different from the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit has occurred.

[0143] Case No. 4 occurs when the short circuit between the data terminal 210 and the clock terminal 220 is resolved at a timing t between after the first timing t1 and before the second timing t2. In this case, the board 120 outputs a high-level voltage from the data terminal 210 to the printing device 20 at the first timing t1 that is different from the first expected value, outputs a high-level voltage equal to the second expected value at the second timing t2, and outputs a low-level voltage equal to the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit exists.

[0144] Case No. 5 occurs when the short circuit between the data terminal 210 and the clock terminal 220 is resolved at a timing t between after the second timing t2 and before the third timing t3. In this case, the board 120 outputs a high-level voltage different from the first expected value from the data terminal 210 to the printing device 20 at the first timing t1, a low-level voltage different from the second expected value at the second timing t2, and a low-level voltage equal to the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit exists.

[0145] Case No. 6 is a case where, at a timing t prior to the first timing t1, the data terminal 210 and the power terminal 230 are shorted, or the data terminal 210 and the reset terminal 240 are shorted. In this case, the board 120 outputs a high-level voltage from the data terminal 210 to the printing device 20 at the first timing t1 that is different from the first expected value, at the second timing t2 that is a high-level voltage equal to the second expected value, and at the third timing t3 that is a high-level voltage different from the third expected value. In this case, the determination unit 411 determines that a short circuit exists.

[0146] Case No. 7 occurs when at least one of the following occurs: the data terminal 210 and the power terminal 230 are shorted, or the data terminal 210 and the reset terminal 240 are shorted, at a timing t that is after the first timing t1 and before the second timing t2. In this case, the board 120 outputs a low-level voltage that is the same as the first expected value from the data terminal 210 to the printing device 20 at the first timing t1, a high-level voltage that is the same as the second expected value at the second timing t2, and a high-level voltage that is different from the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit exists.

[0147] In the case of No. 8, at a timing t after the second timing t2 and before the third timing t3, at least one of the following occurs: the data terminal 210 and the power terminal 230 are shorted, or the data terminal 210 and the reset terminal 240 are shorted. In this case, the board 120 outputs a low-level voltage equal to the first expected value from the data terminal 210 to the printing device 20 at the first timing t1, a high-level voltage equal to the second expected value at the second timing t2, and a high-level voltage different from the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit exists.

[0148] In the case of No. 9, at a timing t after the first timing t1 and before the second timing t2, the short circuit between the data terminal 210 and the power terminal 230 is eliminated, and the short circuit between the data terminal 210 and the reset terminal 240 is also eliminated. In this case, the board 120 outputs a high-level voltage different from the first expected value from the data terminal 210 to the printing device 20 at the first timing t1, outputs a high-level voltage equal to the second expected value at the second timing t2, and outputs a low-level voltage equal to the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit exists.

[0149] In the case of No. 10, at a timing t after the second timing t2 and before the third timing t3, the short circuit between the data terminal 210 and the power terminal 230 is eliminated, and the short circuit between the data terminal 210 and the reset terminal 240 is also eliminated. In this case, the board 120 outputs a high-level voltage different from the first expected value from the data terminal 210 to the printing device 20 at the first timing t1, outputs a high-level voltage equal to the second expected value at the second timing t2, and outputs a low-level voltage equal to the third expected value at the third timing t3. In this case, the determination unit 411 determines that a short circuit exists.

[0150] A3-4.Other software configurations: In the first embodiment, when the printing device 20 receives a second print instruction while printing based on a first print instruction, the device 130 may output the first response signal FS and the second response signal SS to the data terminal 210 after printing based on the first print instruction is completed and before starting printing based on the second print instruction. When the printing device receives a command to clean the print head 5 while receiving a request signal RS, the device 130 may output the first response signal FS and the second response signal SS to the data terminal 210 before performing cleaning. When the device 130 receives a request signal RS, the device 130 may output the first response signal FS and the second response signal SS to the data terminal 210 when the carriage 30 is at an exchange position where the liquid container 100 can be exchanged, and may further output the first response signal FS and the second response signal SS to the data terminal 210 when the carriage 30 moves from the exchange position to a standby position where the liquid container 100 cannot be exchanged. The exchange position is, for example, the position of the carriage 30 when it is at the home position.

[0151] The first response signal FS may also be referred to as the first signal. The second response signal SS may also be referred to as the second signal. The low first response voltage may also be referred to as the first low voltage. The high first response voltage may also be referred to as the first high voltage. The low second response voltage may also be referred to as the second low voltage. The high second response voltage may also be referred to as the second high voltage. The low clock voltage may also be referred to as the low voltage. The high clock voltage may also be referred to as the high voltage. The low reset voltage may also be referred to as the low voltage. The high reset voltage may also be referred to as the high voltage.

[0152] A4. Other embodiments of the first embodiment: A4-1. Other embodiment 1 related to the substrate: Fig. 21A is a diagram illustrating a substrate according to another embodiment 1. Fig. 21A shows an example of a combination of the arrangement of a plurality of contact portions cp. The arrangement of the data contact portion cpd, clock contact portion cpc, power contact portion cpvd, reset contact portion cpr, and ground contact portion cpvs is not limited to that of the first embodiment, and may be other arrangements as shown in combinations No. 1 to No. 24 in Fig. 21. In combinations No. 1 to No. 24, the clock contact portion cpc, data contact portion cpd, power contact portion cpvd, and reset contact portion cpr are arranged in the first region Rg1, and the ground contact portion cpvs is arranged in the second region Rg2.

[0153] In the above-mentioned combinations of contact portions cp, No. 1 to No. 18, at least one contact portion cp of the clock contact portion cpc, the power contact portion cpvd, and the reset contact portion cpr is projected between the projection position swd of the data contact portion cpd and the projection position swvs of the ground contact portion cpvs. In the above-mentioned combinations of contact portions cp, No. 1 to No. 12, any two or more contact portions cp of the clock contact portion cpc, the power contact portion cpvd, and the reset contact portion cpr are projected between the projection position swd of the data contact portion cpd and the projection position swvs of the ground contact portion cpvs. In the above-mentioned combinations of contact portions cp, No. 1 to No. 6 and No. 13 to No. 18, the data contact portion cpd is projected between the projection positions of any two contact portions cp of the power contact portion cpvd, the reset contact portion cpr, and the clock contact portion cpc. In the above-mentioned combinations of contact cp, in Nos. 1, 3, 8, 11, 14, 15, 20, and 23, either or both of the data contact cpd and the reset contact cpr are arranged to be projected between the power contact cpvd and the clock contact cpc, and the reset contact cpr is arranged so that its projection position swr is adjacent to the projection position swvd of the power contact cpvd. In the above-mentioned combinations of contact cp, in Nos. 1, 2, 6 to 8, 13, 14, 16, 23, and 24, the power contact cpvd is arranged so that its projection position swvd is adjacent to the projection position swd of the data contact cpd. In the above combination of contact portion cp arrangements, in No. 1, the clock contact portion cpr is arranged so as to be projected at the position farthest from the projection position swvs of the ground contact portion cpvs, and the data contact portion cpd, power contact portion cpvd, and reset contact portion cpr are arranged so as to be projected in order in the direction from the projection position swc of the clock contact portion cpc on the second virtual line C2 toward the projection position swvs of the ground contact portion cpvs.

[0154] Fig. 21B shows the layout examples shown in No. 2 and No. 3 of Fig. 21A. Substrate 120b is the layout example shown in No. 2 of Fig. 21, and differs from substrate 120 shown in Fig. 5 in that the positional relationship between the clock contact portion cpc and the reset contact portion cpr is swapped. Substrate 120c is the layout example shown in No. 3 of Fig. 21, and differs from substrate 120 shown in Fig. 5 in that the positional relationship between the power contact portion cpvd and the reset contact portion cpr is swapped.

[0155] 21A can be similarly applied to the combination of arrangements of the data terminal 210, the clock terminal 220, the power terminal 230, the reset terminal 240, and the ground terminal 250. The combination of arrangements of the contact parts cp shown in FIG. 21A can also be applied to the combination of arrangements of the device-side terminals 490.

[0156] In the first embodiment and in FIGS. 21A and 21B, the ground contact cpvs is arranged in the second region Rg2, but contacts other than the ground contact cpvs may be arranged in the second region Rg2. For example, the data contact cpc, the power contact cpvd, the reset contact cpr, and the ground contact cpvs may be arranged in the first region Rg1, and the clock contact cpc may be arranged in the second region Rg2. For example, the data contact cpc, the clock contact cpc, the power contact cpvd, and the ground contact cpvs may be arranged in the first region Rg1, and the reset contact cpr may be arranged in the second region Rg2. For example, the data contact cpc, the clock contact cpc, the reset contact cpr, and the ground contact cpvs may be arranged in the first region Rg1, and the power contact cpvd may be arranged in the second region Rg2. For example, the clock contact portion cpc, the power contact portion cpvd, the reset contact portion cpr, and the ground contact portion cpvs may be arranged in the first region Rg1, and the data contact portion cpd may be arranged in the second region Rg2. In these embodiments, the arrangement relationship between the contact portions cp arranged in the first region Rg1 and the contact portions cp arranged in the second region Rg2 is the same as in the first embodiment.

[0157] A4-2. Other embodiment 2 related to the substrate: FIG. 22 shows two patterns of the substrate 120d and the substrate 120e as Alternative Embodiment 2. The arrangement of the ground contact portions 250 is not limited to that of the first embodiment and may be other arrangements. The arrangement of the ground contact portions CPVS of the substrate 120d differs from that of the substrate 120 shown in FIG. 5. The ground contact portions CPVS of the substrate 120d are arranged to form a second row R2. When the substrate 120d is used, the connection mechanism 400 shown in FIGS. 7A and 7B includes device-side terminals corresponding to the ground contact portions CPVS of the substrate 120. The number of ground contact portions CPVS is not limited to that of the first embodiment and may be two or more. The number of ground contact portions CPVS of the substrate 120e differs from that of the substrate 120 shown in FIG. 5. The substrate 120e includes two ground terminals 250a and 250b, each including a ground contact portion CPVS. When the substrate 120e is used, the connection mechanism 400 shown in FIGS. 7A and 7B includes two device-side terminals corresponding to the two ground terminals 250a and 250b. The arrangement of the data contact portion cpd, clock contact portion cpc, power contact portion cpd, and reset contact portion cpr of the substrate 120e is the same as that of the substrate 120 shown in FIG. 5. The ground contact portion cpvs of the ground terminal 250a and the ground contact portion cpvs of the ground terminal 250b are arranged at different positions in the direction along the first virtual line C1. The ground contact portions cpvs of one ground terminal 250a are arranged to form a second row R2. The ground contact portions cpvs of the other ground terminal 250b are arranged to form a first row R1.

[0158] A4-3. Other embodiment 3 related to the substrate: FIG. 23 shows two patterns of the substrate 120f and the substrate 120g according to Alternative Embodiment 3. The size of the ground terminal 250 is not limited to that of the first embodiment and may be other sizes. The ground terminal 250c of the substrate 120f and the ground terminal 250d of the substrate 120g are larger than the ground terminal 250 shown in FIG. 5. The ground terminal 250c is formed across the first row R1 and the second row R2. The ground terminal 250c is arranged across the central portion CMP of the substrate 120f in the direction along the first virtual line C1. The ground terminal 250d of the substrate 120g is further formed across the first region Rg1 and the second region Rg2. The ground terminal 250d is arranged across the first virtual line C1.

[0159] A4-4. Other embodiment 4 related to the substrate: FIG. 24 is a diagram showing two patterns of substrates 120ab and 120ac according to Alternative Embodiment 4. FIG. 25 is a diagram showing two patterns of substrates 120ad and 120ae according to Alternative Embodiment 4. The shape of the terminals 210-250 is not limited to that of the first embodiment and may be other shapes. As shown in FIG. 24, the terminals 210-250 of the substrate 120ab are formed to straddle the first row R1 and the second row R2 and have an elongated shape along the first imaginary line C1. The terminals 210-250 of the substrate 120ac have a rectangular portion like the terminals 210-250 of the substrate 120, as well as an elongated portion along the first imaginary line C1. The data terminal 210 of the substrate 120ad has a portion bent in the direction along the first imaginary line C1 and the second imaginary line C2. The data terminals 210 of the substrate 120ae have portions that are bent in directions along the first virtual line C1 and the second virtual line C2 so as to surround part of the power terminals 230. Even in this case, the positional relationship between the contact portions cp of the terminals 210 to 250 is the same as the positional relationship between the contact portions cp of the first embodiment shown in FIG.

[0160] A4-5. Other embodiment 5 related to the substrate: FIG. 26 is a diagram illustrating a substrate 120Td according to a fifth alternative embodiment. The upper diagram in FIG. 26 illustrates the substrate 120Td. The lower diagram in FIG. 26 schematically illustrates a connection mechanism 400Td corresponding to the substrate 120Td. In the substrate 120 according to the first embodiment, the contact portions cp are arranged in two rows, but this is not limiting. In the substrate 120Td, the contact portions are arranged in three rows. The data contact portions cpd and the ground contact portions cpvs form a third row R3. Thus, even if the arrangement of the contact portions cp along the first virtual line C1 differs from that of the contact portions cp in the first embodiment, their projection positions onto the second virtual line C2 remain unchanged. When the substrate 120Td is mounted in a direction parallel to the gravity direction, the clock contact portion cpc, the power contact portion cpvd, and the reset contact portion cpr are arranged closer to the gravity direction (+Z direction) than the data contact portion cpd. Furthermore, at least one of the clock contact portion cpc, the power contact portion cpvd, and the reset contact portion cpr is arranged so that when the contact portion cp is projected onto the second virtual line C2, it is projected between the projection position swd of the data contact portion cpd and the projection position swvs of the ground contact portion cpvs. Contact portions cp other than the data contact portion cpr and the ground contact portion cpvs may also be arranged at positions along the first virtual line C1 that are different from the contact portions cp in the first embodiment, similar to the data contact portions cpr and ground contact portions cpvs of this embodiment. The positional relationship of each of the contact portions cp described above also applies to each of the contact portions cp of the device-side terminals 490. When the substrate 120Td is mounted in a direction along the gravity direction, the device-side clock contact portion dcpc, the device-side power contact portion dcpvd, and the device-side reset contact portion dcpr are arranged on the +Z direction, which is the gravity direction side, of the device-side data contact portion dcpd. Furthermore, at least one of the device side clock contact portion dcpc, the device side power supply contact portion dcpvd, and the device side reset contact portion dcpr is positioned so that when the contact portion dcp is projected onto the second virtual line C2, it is projected between the projection position swd of the device side data contact portion dcpd and the projection position swvs of the device side ground contact portion dcpvs.

[0161] A4-6. Other embodiment 6 related to the substrate: FIG. 27 is a diagram showing two patterns of substrates 120U and 120V as another embodiment 6 relating to the substrate. The form of the base material 120bd of the substrate 120 is not limited to that of the first embodiment. The substrate 120U is used in common for the four liquid storage containers 100A to 100D. In this case, the four liquid storage containers 100A to 100D may be formed integrally. The substrate 120U includes a first substrate region 120UA, a second substrate region 120UB, a third substrate region 120UC, and a fourth substrate region 120UD. The first substrate region 120UA is a region in which the terminals 290 used for the liquid storage container 100A are arranged. The second substrate region 120UB is a region in which the terminals 290 used for the liquid storage container 100B are arranged. The third substrate region 120UC is a region in which the terminals 290 used for the liquid storage container 100C are arranged. The fourth substrate region 120UD is a region where terminals 290 used for the liquid storage container 100D are arranged. The first substrate region 120UA to the fourth substrate region 120UD may each be considered to be independent substrates. Four devices 130A to 130D used for the four liquid storage containers 100A to 100D are provided on the back surface 120fb of the substrate 120U. The terminals 290 of each substrate region 120UA to 120UD are connected to the corresponding devices 130A to 130D via a wiring pattern layer (not shown) or through holes arranged in the substrate 120U. A power supply voltage VDD is supplied to each of the devices 130A to 130D via a common power supply terminal 230. In this embodiment, the common power supply terminal 230 is provided in the terminal 290 of the first substrate region 120UA. Therefore, in the substrate 120U, the power supply terminal 230 is not provided in the terminals 290 of the second substrate regions 120UB to 120UD. As described above, some of the terminals 290 may be used in common for multiple devices 130A to 130D.

[0162] In the first embodiment, the base material 120bd of the substrate 120 is composed of a single member, but this is not limiting and the substrate 120 may be composed of multiple base materials. In the substrate 120V, the device 130 and the terminal 290 are disposed on separate base materials 124a and 124b, rather than on a single base material. The substrate 120V has a first base material 124a and a second base material 124b. The first base material 124a and the second base material 124b are electrically connected by a conductive line EL or the like. The first base material 124a and the second base material 124b are made of different materials. The first base material 124a is, for example, a rigid base material, and the second base material 124b is a sheet-like base material. The device 130 is molded with resin 139 on the front surface 120faa of the first base material 124a. The terminal 290 is disposed on the front surface 120fab of the second base material 124b.

[0163] A4-7. Other embodiment 7 related to the substrate: FIG. 28 is a diagram showing a substrate 120X according to another embodiment 7 of the present invention. In the first embodiment, as shown in FIG. 5, the types of terminals 290 are five: a data terminal 210, a clock terminal 220, a power terminal 230, a reset terminal 240, and a ground terminal 250. However, this is not limited to five types and the number of terminals may be fewer than five. For example, the substrate 120X may have a data terminal 210, a clock terminal 220, a power terminal 230, and a ground terminal 250. The substrate 120X does not have a reset terminal 240. In this case, the reset signal RST is generated, for example, in the processing unit 136 of the device 130 using the clock signal SCK. For example, the substrate 120X may not have the power terminal 230. In this case, the power supply voltage VDD is generated, for example, in the processing unit 136 of the device 130 using the clock signal SCK. For example, the substrate 120X may have the power terminal 230 but not the reset terminal 240. As such, the terminals 290 in the first embodiment described above may not include at least one of the reset terminal 240 and the power terminal 230. In this embodiment, the terminals 290 of the substrate 120 other than the ground terminal 250 are referred to as "other terminals." In this embodiment, the ground terminal 250 may also be referred to as a first terminal. The data terminal 210 may also be referred to as a second terminal. The clock terminal 220 may also be referred to as a third terminal. The ground contact portion 250 may also be referred to as a first contact portion. The data contact portion 210 may also be referred to as a second contact portion. The clock contact portion 220 may also be referred to as a third contact portion.

[0164] A4-8. Other embodiment 8 related to the substrate: In the embodiment of the present disclosure, the arrangement of the terminals 290 and the contact portions cp may be interchanged across the first virtual line C1. The arrangement of the terminals constituting the first row and the terminals constituting the second row may also be interchanged.

[0165] A4-9. Another embodiment of the liquid storage container: The liquid storage container of the present disclosure is not limited to the liquid storage container 100 shown in FIG. 3, and may have other configurations. Other embodiments of the liquid storage container 100 will be described below. Components similar to those of the liquid storage container 100 of the first embodiment shown in FIGS. 3 and 4, and other embodiments of the liquid storage container, will be given the same reference numerals and will not be described as appropriate. Note that the configuration of the printing device 20, such as the storage unit 4 shown in FIG. 4, will be modified to correspond to the configuration of the liquid storage container.

[0166] FIG. 29 is a perspective view showing a liquid storage container 100p as another embodiment 1 of the liquid storage container. The liquid storage container 100p includes a liquid storage body 101, a liquid supply part 104 having a liquid supply port 104op, and a substrate 120. The liquid storage body 101 defines an ink chamber 150 therein for storing ink. The liquid supply part 104 is formed in the bottom wall 101wb and communicates with the ink chamber 150. The substrate 120 is provided at a corner portion 89 where the third wall 101wb and the second wall 101wr of the liquid storage body 101 intersect. The liquid storage container 100p is attached to the storage portion 4 by engaging a protruding second container engaging part 320 on the first wall 101wf with a recessed part of the storage portion 4, and then rotating the liquid storage container 100 in the rotational mounting direction RD around the second container engaging part 320 as a fulcrum. In the fully attached state, the protruding first container engaging portion 310 of the second wall 101wr engages with the lever of the storage portion 4. In this embodiment, the attachment direction MD includes components in the +Z direction and the -Y direction, and the first direction FD includes components in the +Z direction and the +Y direction, which are components of the attachment direction MD.

[0167] A4-10. Another embodiment of the liquid container: FIG. 30 is a perspective view showing a liquid storage container 100q as a second alternative embodiment of the liquid storage container. FIG. 31 is an enlarged view of the periphery of a substrate 120 of the liquid storage container 100q. As shown in FIG. 30, the liquid storage container 100q includes a liquid container 101, a liquid supply unit 104 having a liquid supply port 104op, and a substrate 120. A liquid storage bag (not shown) that stores ink is disposed inside the liquid container 101. The liquid storage bag is flexible and functions as an ink chamber 150. The liquid supply unit 104 is provided in the liquid storage bag and is disposed in an opening 424 formed in a front wall 101wf of the liquid container 101. The substrate 120 is provided at a corner portion 89a where the second wall 101wr and the fourth wall 101wu of the liquid container 101 intersect. The corner portion 89a is a recess recessed inward of the liquid container 101. In this embodiment, the mounting direction MD is the −Y direction, and the first direction FD includes a component in the −Y direction, which is the mounting direction MD, and a component in the +Z direction.

[0168] A4-11. Another embodiment of the liquid container: FIG. 32 is a perspective view showing a liquid storage container 100r as a third modification of the liquid storage container. The -Y direction of the liquid storage container 100r corresponds to the mounting direction MD. The liquid storage container 100r includes a liquid storage body 101, a liquid supply unit 104 having a liquid supply port 104op, and a substrate 120. A liquid storage bag (not shown) that stores ink is disposed inside the liquid storage body 101. This liquid storage bag is flexible and functions as an ink chamber 150. The liquid supply unit 104 is provided in the liquid storage bag and is disposed in an opening 424 formed in a second wall 101wr of the liquid storage body 101. The substrate 120 is provided at a corner portion 89a where the second wall 101wr and fourth wall 101wu of the liquid storage body 101 intersect. The corner portion 89a is a recess recessed inward of the liquid storage body 101. A groove-shaped container-side engagement structure 425 is formed on the third wall 101wb of the liquid container 101. When the liquid container 100r is in a fully attached state, the container-side engagement structure 425 engages with a protrusion-shaped apparatus-side engagement structure of the container part 4, thereby restricting movement of the liquid container 100 in the +Y direction, which is the removal direction. In this embodiment, the attachment direction MD is the -Y direction, and the first direction FD includes components in the -Y direction, which is the attachment direction MD, and the -Z direction.

[0169] A4-12. Another embodiment 4 of the liquid storage container: FIG. 33 is a perspective view showing a liquid storage container 100s as a fourth alternative embodiment of the liquid storage container. The liquid storage container 100s is removably housed in a case 61 that is provided in a removable manner on the printing device 20, and then attached to the printing device 20 together with the case 61. The liquid storage container 100s includes a liquid storage bag 111 and a connecting member 112 attached to one end of the liquid storage bag 111 on the −Y direction side. In this embodiment, the liquid storage bag 111 and the connecting member 112 function as a liquid storage body. The liquid storage bag 111 is flexible. A liquid supply unit 104 having a liquid supply port 104op is provided on the −Y direction side of the liquid storage bag 111 that functions as the ink chamber 150. The liquid supply unit 104 is disposed in an opening 424 formed in a second wall 101wr of the connecting member 112. The substrate 120 is disposed in a corner portion 89a, which is a recess formed in the second wall 101wr of the connecting member 112. In this embodiment, the mounting direction MD is the −Y direction, and the first direction FD includes components in the −Y direction, which is the mounting direction MD, and the −Z direction.

[0170] A4-13. Another embodiment 5 of the liquid storage container: FIG. 34 is a perspective view showing a liquid storage container 100w as a fifth alternative embodiment of the liquid storage container. In the liquid storage container 100w, the substrate 120 is disposed on a fourth wall 101wu, which is a horizontal surface in the fully attached state. The fourth wall 101wu constitutes the upper wall in the fully attached state. Similar to the liquid storage container 100 shown in FIGS. 3 and 4, the liquid storage container 100w includes a liquid storage body 101 and a liquid supply unit 104 having a liquid supply port 104op. A flexible liquid storage bag (not shown) for storing ink is disposed inside the liquid storage body 101. This liquid storage bag functions as an ink chamber 150. The liquid supply unit 104 is provided in the liquid storage bag and is disposed in an opening 424 formed in the second wall 101wr of the liquid storage body 101. In this embodiment, the attachment direction MD is the −Y direction, and the first direction FD is a direction along the −Y direction, which is the attachment direction MD.

[0171] A4-14. Another embodiment 6 of the liquid storage container: FIG. 35 is a perspective view showing a liquid storage container 100x as a sixth modified embodiment of the liquid storage container. In the liquid storage container 100x, the substrate 120 is disposed on a fifth wall 101wsa, which is a vertical surface in the fully attached state. The fifth wall 101wsa constitutes a side wall in the fully attached state. Similar to the liquid storage container 100 shown in FIGS. 3 and 4, the liquid storage container 100x includes a liquid container 101 and a liquid supply unit 104 having a liquid supply port 104op. A flexible liquid storage bag (not shown) for storing ink is disposed inside the liquid storage container 101. This liquid storage bag functions as an ink chamber 150. The liquid supply unit 104 is provided in the liquid storage bag and is disposed in an opening 424 formed in the second wall 101wr of the liquid storage container 101. In this embodiment, the attachment direction MD is the −Y direction, and the first direction FD is a direction along the −Y direction, which is the attachment direction MD.

[0172] A4-15. Another embodiment 7 of the liquid storage container: FIG. 36 is a diagram showing a liquid storage container 100y as a seventh modified embodiment of the liquid storage container. In the liquid storage container 100 of the first embodiment described above, the liquid storage body 101 and the substrate 120 are integrally configured as shown in FIGS. 3 and 4 , but this is not limiting. For example, the liquid storage container 100y includes a liquid storage body 101ya that defines an ink chamber 150 and an adapter 101yb to which the substrate 120 is attached. The liquid supply unit 104 is formed in the liquid storage body 101ya. The liquid storage body 101ya is removably housed in a concave-shaped adapter 101yb. The adapter 101yb functions as a case that houses the liquid storage body 101ya. An opening 134 through which the liquid supply unit 104 is inserted is formed in a third wall 101wb of the adapter 101yb. The liquid storage body 101ya may be fixed to the adapter 101yb using a fixing member (not shown). The liquid container 101ya does not have to be fixed to the adapter 101yb.

[0173] A4-16. Another embodiment of the liquid container 8: FIG. 37 is a diagram showing liquid storage containers 100g and 100h as another embodiment 8 of the liquid storage container. In the liquid storage container 100 of the first embodiment described above, the multiple terminals 290 and the device 130 are disposed on the base material 120bd as shown in FIGS. 4 to 6, but this is not limiting. In the liquid storage container 100g, the multiple terminals 290 and the device 130 are disposed directly on the second wall 101wr of the liquid storage body 101, without the base material 120bd interposed therebetween. The multiple terminals 290 and the device 130 are electrically connected by a wiring pattern (not shown) or the like. In this way, the liquid storage body 101, the multiple terminals 290, and the device 130 may be integrally configured as the liquid storage container 100g.

[0174] In the liquid storage container 100h, the multiple terminals 290 are disposed directly on the second wall 101wr of the liquid storage body 101 without the base material 120bd interposed therebetween. The device 130 is disposed on the mounting base material 120h, and is disposed on the second wall 101wr of the liquid storage body 101 via the mounting base material 120h. The multiple terminals 290 and the device 130 are electrically connected by a wiring pattern (not shown) or the like. In this way, the liquid storage body 101 and the multiple terminals 290 may be configured as an integrated unit as the liquid storage container 100h, and the device 130 may be configured as a separate unit.

[0175] A4-17. Another embodiment 9 of the liquid storage container: FIG. 38 is a perspective view showing a liquid storage container 100z according to a ninth alternative embodiment of the liquid storage container. FIG. 39 is an enlarged view of the periphery of a substrate 120 of the liquid storage container 100z. The X, Y, and Z axes shown in each figure of the ninth alternative embodiment are based on the state when the liquid storage container 100z has been completely inserted into a storage unit (described later) of the printing device. When installing the liquid storage container 100z in the printing device, two installation operations are performed. In this embodiment, the first direction FD has a Y-direction component and a Z-direction component, and the second direction SD is the X-direction. As shown in FIG. 38, the liquid storage container 100z includes a liquid storage body 101z, a liquid supply unit 104 having a liquid supply port 104op, and a substrate 120. The liquid storage body 101z includes a storage main body 101za capable of storing liquid and a cover member 101zb attached to the storage main body 101za. The liquid supply part 104 is disposed in an opening 424 formed in a third wall 101wb of the liquid container 101z, which is formed by the cover member 101zb. The substrate 120 is provided at a corner part 89z where the second wall 101wr and the third wall 101wb of the liquid container 101z intersect. The corner part 89z is a recess recessed inward into the liquid container 101z.

[0176] 39, the substrate 120 is oriented differently from that in FIG. 5, with the data terminal 210 and the reset terminal 240 positioned further towards the −Z direction than the clock terminal 220, the power terminal 230, and the ground terminal 250.

[0177] FIG. 40 is a first diagram illustrating the process of mounting the liquid storage container 100z in the storage unit 4z of the printing device. FIG. 41 is a second diagram illustrating the process of mounting the liquid storage container 100z in the storage unit 4z of the printing device. FIG. 42 is a diagram illustrating the completed mounting of the liquid storage container 100z. The storage unit 4z is located in a different location from the print head (not shown). The storage unit 4z and the print head are connected by a liquid circulation tube (not shown). The liquid in the liquid storage container 4z mounted in the storage unit 4z is supplied to the print head through the liquid circulation tube.

[0178] 40, the liquid storage container 100z is inserted into the mounting chamber 65 of the storage unit 4z through the mounting opening 474 of the storage unit 4z by moving the liquid storage container 100z in a first mounting direction MD1, which is the horizontal direction. The first mounting direction MD1 is the +Y direction.

[0179] As shown in Fig. 41, the liquid storage container 100z is pushed in a first mounting direction MD1, completing contact between the device-side terminals 490 of the connection mechanism 400 of the storage unit 4z and the terminals 290 of the substrate 120. By pushing down the second wall 101wr side of the liquid storage container 100z shown in Fig. 41, the liquid storage container 100z rotates around a rotation fulcrum Rp provided on the storage unit 4z in a second mounting direction MD2 having a component in the direction of gravity. The second mounting direction MD2 has components in the +Z direction and the +Y axis direction.

[0180] 42, when the rotational movement of the liquid storage container 100z in the second mounting direction MD2 is completed, the liquid supply portion 104 of the liquid storage container 100z and the liquid introduction portion 6 of the storage portion 4z are connected. In this embodiment, either the first mounting direction MD1 or the second mounting direction MD2 is the mounting direction MD.

[0181] A4-18. Another embodiment of the liquid container 10: In the first embodiment and other embodiments described above, the liquid storage container 100 is an ink cartridge, but this is not limiting. The liquid storage container 100 may be, for example, a waste liquid storage container. The waste liquid storage container is a container that stores waste liquid ejected from the nozzles of the print head 5 when the printing device 20 performs cleaning of the print head 5, for example.

[0182] A4-19. Another embodiment of the printing system: The printing system of the present disclosure is not limited to the printing system 1000 shown in FIG. 1. FIG. 43 is a diagram showing a printing system 1000A as another embodiment 1 of the printing system. In the first embodiment described above, as shown in FIG. 1, a configuration called an on-carriage is used in which the liquid storage container 100 is mounted on the carriage 30, but this is not limiting. A configuration called an off-carriage is also possible in which the liquid storage container 100 is mounted in a location different from the carriage 30. The printing system 1000A is an off-carriage type printing system and includes a printing device 20A and a liquid storage container 100T. The printing device 20A has a carriage 30 equipped with a print head 5. The liquid storage container 100T is detachably mounted to a container mounting unit 600 located in a location different from the carriage 30. Like the liquid storage container 100 of the first embodiment, the liquid storage container 100T also includes a liquid container, a liquid storage unit having an ink supply port, and a substrate. The printing device 20A is fitted with, for example, liquid containers 100q to 100x shown in Figures 30 to 35. The printing device 20A, like the printing device 20, executes a connection state determination process.

[0183] A4-20. Another embodiment of the printing system 2: FIG. 44 shows a printing system 1000C as another embodiment 2 of the printing system. In the first embodiment, as shown in FIG. 1, the storage unit 4, to which the liquid storage container 100 is detachably attached, is located inside the main body of the printing device 20. However, the location of the storage unit 4 is not limited thereto. In the printing system 1000C shown in FIG. 45, the storage unit 4C of the printing device 20C is located outside the main body 201 of the printing device 20C. As shown in FIGS. 7A and 7C, the storage unit 4C includes a liquid introduction unit 6, a connection mechanism 400, and a sub-control board 500. The liquid introduction unit 6 and the print head 5 located inside the main body 201 are connected by a flexible liquid circulation tube 105. A plurality of liquid circulation tubes 105 are provided, corresponding to the number of liquid introduction units 6. The plurality of liquid circulation tubes 105 are housed in a single protective tube 106. The printing device 20C also has a bus 107 that connects the sub-control board 500 to a main control unit 40 (not shown) located within the main body 201 and transmits and receives various signals. Similar to the liquid storage container 100 of the first embodiment, the liquid storage container 100 shown in Fig. 45 also includes a liquid container, a liquid supply unit having a liquid supply port, and a substrate. Similar to the printing device 20, the printing device 20C executes a connection status determination process.

[0184] A4-21. Other embodiment of printing system 3: FIG. 45 is a diagram showing a printing system 1000D as a third alternative embodiment of the printing system. Similar to the first embodiment, the printing system 1000D includes four liquid containers 100A, 100B, 100C, and 100D, and the printing device 20 shown in FIG. 1. The liquid containers 100A-100D may be formed integrally, or may be formed separately. Liquid is replenished into the liquid containers 100A-100D via an external liquid storage unit 814 and a liquid circulation pipe 812 disposed outside the printing system 100D. In FIG. 45, the liquid storage unit 814 and the liquid circulation pipe 812 corresponding to each of the liquid containers 100A-100D are designated by the suffixes "A" to "D."

[0185] A4-22. Other embodiment 4 of the printing system: FIG. 46 is a diagram showing a printing system 1000E as a fourth alternative embodiment of the printing system. The printing system 1000E includes an adapter 101E having a substrate 120, a liquid container 824 capable of containing liquid, a liquid circulation tube 822, and the printing device 20 shown in FIG. 1. The adapter 101E is detachably attached to the container 4. The liquid circulation tube 822 connects the liquid container 824 to the liquid introduction section 6 and functions as a liquid supply section. The portion of the liquid circulation tube 822 that connects to the liquid introduction section 6 functions as a liquid supply port. There are four adapters 101E, four liquid circulation tubes 822, and four liquid containers 824. In the printing system 1000E, the "attachment complete state" refers to a state in which the adapter 101E having the substrate 120 is attached to the printing device 120 and no short circuit has occurred between the terminals 290. In this embodiment, "the board 120 is attached to the printing device 20" means that the board 120 is physically attached to the printing device 20 and the contact portion cp of the terminal 290 is electrically connected to the device-side terminal 490. The data terminal 210 of the board 120 is used to detect whether the board 120 is attached to the printing device 20. The attachment determination unit 412 of the printing device 20 determines whether the board 120 is attached. The first response signal RT1 and the second response signal RT2 are signals used by the printing device 20 to determine whether the board 120 is attached to the printing device 20.

[0186] A4-23. Other embodiments related to electrical and software configurations: In the first embodiment described above, as shown in FIG. 1, four liquid storage containers 100A-100D are removably attached to the storage unit 4. However, the number of liquid storage containers 100 removably attached to the storage unit 4 is not limited to this. Below, using FIGS. 47A and 47B, a timing chart of the connection state determination process in a printing system 1000 in which six liquid storage containers 100 are removably attached to the storage unit 4 will be described. The six liquid storage containers 100, for example, contain inks of different colors. FIGS. 47A and 47B are timing charts that schematically show signals input to and output from the terminal 290 of the liquid storage container 100 in the installation complete state. FIG. 47A is a first timing chart in the printing system 1000 that includes six liquid storage containers 100A-100F. FIG. 47B is a second timing chart in the printing system 1000 that includes six liquid storage containers 100A-100F. Fig. 47A is a diagram corresponding to Fig. 11A, and Fig. 47B is a diagram corresponding to Fig. 11B. VDD, RST, SCK, SDA1 to SDA6 shown in Fig. 44A and Fig. 44B mean signals transmitted / received or voltages supplied via corresponding terminals 290 by corresponding lines LVDD, LRST, LSCK, and LSDA1 to LSDA6.

[0187] The request signal RS shown in Fig. 47A differs from the request signal RS shown in Fig. 11A in that the bits of cycles D4 and D3 of the command period CMT shown in Fig. 47A are assigned to specify the fifth liquid storage container 100E and the sixth liquid storage container 100F. In the request signal RS transmitted via the data line LSDA5 connected to the device 130E of the liquid storage container 100E, the second bit of the first identification data DB1 is high and the remaining bits are low. In the request signal RS transmitted via the data line LSDA6 connected to the device 130F of the liquid storage container 100F, the first bit of the first identification data DB1 is high and the remaining bits are low.

[0188] 11B is that the waveforms of the first response signal FS and the second response signal SS corresponding to the liquid storage containers 100E, 100F have been added. The device 130E of the liquid storage container 100E outputs the first response signal FS to the data terminal 210 in cycle D4 of the first response period RT1, and outputs the second response signal SS to the data terminal 210 in cycle D4 of the second response period RT2. The device 130F of the liquid storage container 100F outputs the first response signal FS to the data terminal 210 in cycle D3 of the first response period RT1, and outputs the second response signal SS to the data terminal 210 in cycle D3 of the second response period RT2.

[0189] FIG. 48 is a diagram schematically illustrating the electrical configuration of a printing system 1000 equipped with six liquid containers 100A-100F. In FIG. 48, components similar to those in the electrical configuration shown in FIG. 8 are assigned the same reference numerals, and descriptions thereof will be omitted where appropriate. The difference between the electrical configuration of FIG. 48 and the electrical configuration shown in FIG. 8 is that, in FIG. 8, the lines LSDA, LRST, LSCK, and LVDD other than the ground line LVSS are provided independently corresponding to the four liquid containers 100A-100D, whereas in FIG. 48, the lines LRST, LSCK, and LVDD other than the data line LSDA are used in common for multiple devices 130. Note that, in FIG. 48 as well, the ground line LVSS is used in common for the devices 130A-130F of the six liquid containers 100A-100F.

[0190] As shown in FIG. 48, the power supply line LVDD2 electrically connected to the host terminal HVDD2 of the sub-controller 50 is electrically connected to the two devices 130B and 130E in the mounting complete state. The reset line LRST2 electrically connected to the host terminal HRST2 of the sub-controller 50 is electrically connected to the two devices 130B and 130C in the mounting complete state. The clock line LSCK2 electrically connected to the host terminal HSCK2 of the sub-controller 50 is electrically connected to the two devices 130B and 130D in the mounting complete state. The power supply line LVDD4 electrically connected to the host terminal HVDD4 of the sub-controller 50 is electrically connected to the two devices 130C and 130D in the mounting complete state. The reset line LRST4 electrically connected to the host terminal HRST4 of the sub-controller 50 is electrically connected to the two devices 130D and 130E in the mounting complete state. In the fully mounted state, the clock line LSCK4 electrically connected to the host terminal HSCK4 of the sub-controller 50 is electrically connected to the two devices 130C and 130E. The lines LSDA1, LVDD1, LRST1, and LSCK1 electrically connected to the device 130A and the lines LSDA6, LVDD6, LRST6, and LSCK6 electrically connected to the device 130F are used independently without being used in conjunction with other devices 130.

[0191] Part of the electrical configuration of the printing system 1000 shown in Fig. 48 may be applied to the printing system 1000 shown in Fig. 1, which includes four liquid storage containers 100A to 100D. For example, the liquid storage containers 100B to 100E shown in Fig. 48 may be used in place of the liquid storage containers 100A to 100D of the printing system 1000 shown in Fig. 1. For example, the liquid storage containers 100A, 100B, 100E, and 100F shown in Fig. 48 may be used in place of the liquid storage containers 100A to 100D of the printing system 1000 shown in Fig. 1.

[0192] A4-24. Another embodiment 1 of the device: In the first embodiment, as shown in FIG. 6, the device 130 includes the processing unit 136 and the storage unit 138, but this is not limiting. FIG. 49 is a diagram showing devices 130a and 130b as another embodiment 1 of the device 130. The device 130a includes the processing unit 136 but does not include the storage unit 138. The storage unit 138 may be separate from the device 130. In this case, the storage unit 138 is electrically connected to the processing unit 136 of the device 130b. The device 130b includes a first processing unit 136a, a second processing unit 136b, and a storage unit 138. The first processing unit 136a is connected to the storage unit 138. The second processing unit 136b is connected to the first processing unit 136 and terminals 210 to 250. In this embodiment, the first processing unit 136a and the second processing unit 136b collectively function as a processing unit. Thus, device 130b may have multiple processing units 136a, 136b.

[0193] A4-25. Another embodiment 2 of the device: In the first embodiment, as shown in FIG. 11C , the first response signal FS is output during the entire period when the clock signal SCK is at a high level. However, this is not limited to this. For example, the device 130 may output the first response signal FS to the data terminal 210 during part of the period when the clock signal SCK is at a high level. For example, the device 130 may set the driving state of the data terminal 210 to high impedance after outputting the first response signal FS during the period when the clock signal SCK is at a high level. For example, the device 130 may output the first response signal FS including a low level during the period when the clock signal SCK is at a low level and during the period when the clock signal SCK is at a high level during one cycle of the clock signal SCK.

[0194] A4-26. Other Device Embodiment 3: In the first embodiment, the frequency of the clock signal SCK is constant in the connection state determination process as shown in FIGS. 11A and 11B. However, it does not have to be constant. For example, the frequency of the clock signal SCK in the second response period RT2 may be set lower than the frequency of the clock signal SCK in the first response period RT1. The second response signal SS contains a different voltage. In the second response period RT2, the frequency of the clock signal SCK may be set lower than that in the first response period RT1, and the second response signal SS may be output for a longer period than the first response signal FS.

[0195] A4-27. Other Device Embodiment 4: In the first embodiment, the processing unit 136 of the device 130 may repeatedly output the first response signal FS and the second response signal SS by repeatedly providing the first response period RT1 and the second response period RT2 in this order while the reset signal RST is at a high level. After outputting a low-level voltage of the second response signal SS to the data terminal 210, the processing unit 136 of the device 130 may output the first response signal FS and the second response signal SS to the data terminal 210 when the request signal RS is input to the data terminal 210 again.

[0196] A4-28. Another embodiment 5 of the device: 11B, in the first embodiment, the rising and falling edges of the clock signal SCK are the same as those of signals such as the first response signal FS in the first response period RT1 and the second response signal SS in the second response period RT2, but this is not limiting. For example, the rising and falling edges of signals such as the first response signal FS in the first response period RT1 and the second response signal SS in the second response period RT2 may be delayed from those of the clock signal SCK.

[0197] A4-29. Other Device Embodiment 6: In the first embodiment, the processing units 136A-136D of the devices 130A-130D output the first response signal FS and the second response signal SS to the data terminal 210 at different cycles of the clock signal SCK, but this is not limiting. For example, the processing units 136A-136D of the devices 130A-130D may output the first response signal FS and the second response signal SS at the same cycle of the clock signal SCK. In the connection status determination process, the printing device 20 transmits and receives signals via the individual data lines LSDA1-LSDA4 electrically connected to the devices 130A-130D. Therefore, even if the first response signal FS and the second response signal SS are output from the data terminal 210 from the devices 130A to 130D in the same cycle during the first response period RT1 and the second response period RT2, the sub-controller 50 of the printing device 20 can detect the voltage output from the data terminal 210 at each of the first timing t1 to the third timing t3. In this case, the request signal RS is set to a high level in the corresponding bit of the command period CMT.

[0198] For example, the processing units 136A to 136D of the devices 130A to 130D may output the first response signal FS and the second response signal SS to the data terminal 210 in all of the cycles D3 to D8 of the first response period RT1 and the second response period RT2. In this case, the first timing t1 may be provided in all of the cycles D3 to D8 of the first response period RT1. The second timing t2 and the third timing t3 may be provided in all of the cycles D3 to D8 of the second response period RT2.

[0199] A4-30. Other embodiments of the device 130: In the first embodiment, the processing units 136A to 136D of the devices 130A to 130D output the first response signal FS and the second response signal SS to the data terminal 210 in cycles D8 to D5 of the first response period, but this is not limited to this. For example, the processing units 136A to 136D of the devices 130A to 130D may output the first response signal FS and the second response signal SS to the data terminal 210 in cycles D5 to D8 of the first response period. In this case, the request signal RS is set to a high level in the corresponding bit of the command period CMT.

[0200] A4-31. Other Device Embodiment 8: In the first embodiment, device 130 receives a request signal RS at data terminal 210 and outputs a first response signal FS and a second response signal SS to data terminal 210, but the terminal to which request signal RS is received may be a terminal other than data terminal 210. Similarly, the terminal that outputs the first response signal FS and the second response signal SS may be a terminal other than data terminal 210. In this case, device 130 and the terminal are connected.

[0201] B. Other forms: The present disclosure is not limited to the above-described embodiments and can be realized in various configurations without departing from the spirit thereof. For example, the technical features of the embodiments corresponding to the technical features in each embodiment described below can be appropriately substituted or combined to solve some or all of the above problems or achieve some or all of the above objects. Furthermore, if a technical feature is not described as essential in this specification, it can be deleted as appropriate. Each of the following embodiments does not need to include all of the configurations of the present disclosure. Each of the following embodiments only needs to include the minimum configuration necessary to solve the above problems or achieve the above objects. Unless otherwise specified, the effects corresponding to one embodiment are independent of the effects corresponding to other embodiments. When a combination of embodiments is used, the effects corresponding to the combined embodiment are achieved.

[0202] (1) According to a first aspect of the present disclosure, there is provided a device configured to be electrically connected to a plurality of terminals of a liquid container attached to a printing device including a print head, a liquid introduction section that introduces liquid into the print head, a storage section provided with the liquid introduction section, and a plurality of device-side terminals provided in the storage section, the device being configured to satisfy the following I, II, III, and IV. I: A first signal including a first low voltage, a second signal including a second low voltage, and a second high voltage higher than the second low voltage is output to a first terminal included in the plurality of terminals. II: The first signal and the second signal are used by the printing device to determine that the first terminal and any other terminal included in the plurality of terminals other than the first terminal are not short-circuited, and that the liquid container is attached to the printing device. III: The first signal is output to the first terminal, and after outputting the first signal, the second signal is output to the first terminal. IV: A clock signal in which low voltages and high voltages alternate and are repeated at a predetermined cycle is input to a second terminal included in the other terminals, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first low voltage is output to the first terminal, and at a second timing during a period in which the voltage input to the second terminal is the low voltage after outputting the first low voltage, the second high voltage is output to the first terminal, and at a third timing during a period in which the voltage input to the second terminal is the high voltage after outputting the second high voltage, the second low voltage is output to the first terminal. According to this aspect, a first low voltage is output to the first terminal at a predetermined first timing during a period in which the voltage input to the second terminal is high. After outputting the first low voltage, a second high voltage is output to the first terminal at a second timing during which the voltage input to the second terminal is low. After outputting the second high voltage, a second low voltage is output to the first terminal at a third timing during which the voltage input to the second terminal is high. This allows the device to output a signal used to determine whether the first terminal of the liquid container is not short-circuited to the other terminals and whether the liquid container is attached to the printing device. This reduces the possibility that the printing device will not operate normally or that the liquid container will not be able to read or write data from or to the device normally, even if it is determined that the liquid container is attached to the printing device. This aspect of the device represents an improvement over conventional technology.

[0203] (2) In the above embodiment, when the first terminal and the other terminal are not short-circuited, the first low voltage may be output to the first terminal before the first timing during the high voltage period in one cycle of the clock signal. Generally, a voltage is output more stably after a certain time has elapsed since output than immediately after output. According to this embodiment, by outputting the first low voltage to the first terminal before the first timing during the high voltage period in one cycle of the clock signal, the device can output a signal to the printing device at the first timing with the first low voltage output to the first terminal in a stable state.

[0204] (3) In the above embodiment, when the first terminal and the other terminal are not short-circuited, the second high voltage may be output to the first terminal before the second timing during the low voltage period in one cycle of the clock signal. According to this embodiment, by outputting the first high voltage to the first terminal before the second timing during the low voltage period in one cycle of the clock signal, the device can output a signal to the printing apparatus at the second timing with the first high voltage output to the first terminal in a stable state.

[0205] (4) In the above embodiment, when the first terminal and the other terminal are not short-circuited, the second low voltage may be output to the first terminal before the third timing during the high voltage period in one cycle of the clock signal. According to this embodiment, by outputting the second low voltage to the first terminal before the third timing during the high voltage period in one cycle of the clock signal, the device can output a signal to the printing device at the third timing with the second low voltage output to the first terminal in a stable state.

[0206] (5) In the above embodiment, when the first terminal and the other terminal are not short-circuited, if the voltage input to the second terminal changes from the high voltage to the low voltage during one cycle of the clock signal, the second high voltage may be output to the first terminal, and if the voltage input to the second terminal changes from the low voltage to the high voltage, the second low voltage may be output to the first terminal. According to this embodiment, the voltage output to the first terminal is different from the voltage input to the second terminal. When the first terminal and the second terminal are short-circuited, the voltage of the first terminal becomes the same as the voltage of the second terminal, making it possible to distinguish between when the first terminal and the second terminal are not short-circuited and when they are short-circuited. Therefore, the device can output a signal indicating that the first terminal and the other terminal are not short-circuited and that a liquid container is attached to the printing device.

[0207] (6) In the above embodiment, when the first terminal and the other terminal are not short-circuited, if the voltage input to the second terminal changes from the low voltage to the high voltage, the first low voltage may be output to the first terminal. According to this embodiment, the voltage output to the first terminal is different from the voltage input to the second terminal. When the first terminal and the second terminal are short-circuited, the voltage of the first terminal becomes the same as the voltage of the second terminal, making it possible to distinguish between when the first terminal and the second terminal are not short-circuited and when they are short-circuited. Therefore, the device can output a signal indicating that the first terminal and the other terminal are not short-circuited and that a liquid container is attached to the printing device.

[0208] (7) In the above embodiment, steps III and IV may be performed multiple times. Static electricity or other factors may cause the first signal to be incorrectly input from the printing device. According to this embodiment, by performing steps III and IV multiple times, the device can output a signal indicating that the first terminal and the other terminals are not short-circuited and that a liquid container is attached, even if static electricity or other factors are present.

[0209] (8) In the above aspect, if the printing device receives a second print instruction while printing based on a first print instruction, the first signal and the second signal may be output to the first terminal after printing based on the first print instruction has finished and before starting printing based on the second print instruction. According to this aspect, by outputting the first signal and the second signal to the first terminal after printing based on the first print instruction has finished and before starting printing based on the second print instruction, the device can output signals indicating that the first terminal and other terminals are not short-circuited and that a liquid container is attached to the printing device, even between successive prints.

[0210] (9) In the above aspect, when the printing device receives an instruction to clean the print head, the printing device may output the first signal and the second signal to the first terminal before performing the cleaning. According to this aspect, when the printing device receives an instruction to clean the print head, the device outputs a signal indicating that the first terminal and the other terminals are not short-circuited and that a liquid container is attached to the printing device, thereby preventing cleaning failures due to communication problems.

[0211] (10) In the above aspect, the storage unit may output the first signal and the second signal to the first terminal when the storage unit is at an exchange position where the liquid storage container can be replaced, and may output the first signal and the clock signal to the first terminal when the storage unit moves from the exchange position to a standby position where the liquid storage container cannot be replaced. According to this aspect, the mounting orientation of the liquid storage container may be unstable immediately after replacement of the liquid storage container. The mounting orientation of the liquid storage container may change while moving to the standby position. The change in mounting orientation may cause a short circuit between the first terminal and other terminals or poor contact between the liquid storage container and the printing device. Therefore, by outputting the first signal and the second signal to the first terminal at the exchange position and also at the standby position immediately thereafter, the device can output a signal indicating that the first terminal is not short-circuited and that the liquid storage container is attached to the printing device. Alternatively, the user may operate the storage unit at the exchange position to move to the standby position even before replacement of the liquid storage container is complete. In such a case, by outputting a first signal and a second signal to the first terminal when the device is moved to the standby position, the device can output a signal indicating that the first terminal and the other terminals are not short-circuited and that a liquid container is attached to the printing device.

[0212] (11) In the above embodiment, the first terminal may be a data terminal, the second terminal may be a clock terminal, the first signal may be a first response signal that responds to the printing device, and the second signal may be a second response signal that responds to the printing device.

[0213] (12) In the above aspect, the device may store information about the liquid contained in the liquid container.

[0214] (13) In the above embodiment, a reset signal including a low voltage and a high voltage may be input to a third terminal included in the other terminals, and a power supply voltage may be input to a fourth terminal included in the other terminals.

[0215] (14) In the above embodiment, after the power supply voltage is input to the fourth terminal, the reset signal changes from the low voltage to the high voltage, so that the high voltage is input to the third terminal, and after the high voltage of the reset signal is input to the third terminal, the clock signal is input to the second terminal, and after the high voltage of the reset signal is input to the third terminal, the first signal may be input to the first terminal.

[0216] (15) In the above aspect, the power supply voltage supplied to the fourth terminal may be used to drive the device.

[0217] (16) In the above aspect, the third terminal may be a reset terminal, and the fourth terminal may be a power supply terminal.

[0218] (17) According to a second aspect of the present disclosure, there is provided a substrate that is mounted on a printing device including a print head, a liquid introduction section that introduces liquid into the print head, a storage section that is provided with the liquid introduction section and that stores a liquid storage container, and a plurality of apparatus-side terminals that are provided in the storage section, and that is configured to come into contact with the plurality of apparatus-side terminals. The substrate includes a base material, a device provided on the base material, and a plurality of terminals that are provided on the base material and electrically connected to the device, the plurality of terminals including a first terminal and other terminals including a second terminal, and is configured to satisfy I, II, III, and IV described below. I: The device outputs a first signal including a first low voltage, a clock signal including a second low voltage, and a second high voltage higher than the second low voltage, from the first terminal to the printing device. II: The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the board is installed in the printing device. III: The device outputs the first signal to the first terminal, and after outputting the first signal, outputs the second signal to the first terminal. IV: When the first terminal and the other terminal are not short-circuited, a clock signal that alternates between low and high voltages and repeats at a predetermined period is input from the printing device to the second terminal, and at a first timing during a period in which the voltage input to the second terminal is the high voltage, the first low voltage is output from the first terminal to the printing device as a first expected value, and after outputting the first low voltage, at a second timing during a period in which the voltage input to the second terminal is the low voltage, the second high voltage is output from the first terminal to the printing device as a second expected value, and after outputting the second high voltage, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value. According to this embodiment, a first low voltage is output from the first terminal to the printing device at a predetermined first timing during a period in which the voltage input to the second terminal is high. After outputting the first low voltage, a second high voltage is output from the first terminal to the printing device at a second timing during which the voltage input to the second terminal is low. After outputting the second high voltage, a second low voltage is output from the first terminal to the printing device at a third timing during which the voltage input to the second terminal is high. This allows the device to output a signal used to determine whether the first terminal and the other terminals of the liquid container are short-circuited and whether the liquid container is attached to the printing device, and the board outputs this signal from the device to the printing device from the first terminal. This reduces the possibility that the printing device will not operate normally or that the liquid container will not be able to read or write data from or to the device properly even if it is determined that the liquid container is attached to the printing device. The board in this embodiment represents an improvement over conventional technology.

[0219] (18) In the above embodiment, when the first terminal and the second terminal are short-circuited, a voltage different from the first expected value may be output from the first terminal to the printing device at the first timing, a voltage different from the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage different from the third expected value may be output from the first terminal to the printing device at the third timing. According to this embodiment, a voltage indicating the occurrence of a short circuit can be output from the board.

[0220] (19) In the above embodiment, if the first terminal and the second terminal are short-circuited after the first timing and before the second timing, a voltage equal to the first expected value may be output from the first terminal to the printing device at the first timing, a voltage different from the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage different from the third expected value may be output from the first terminal to the printing device at the third timing. This embodiment provides the same effect as the embodiment (18) above.

[0221] (20) In the above embodiment, if the first terminal and the second terminal are short-circuited after the second timing and before the third timing, a voltage equal to the first expected value may be output from the first terminal to the printing device at the first timing, a voltage equal to the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage different from the third expected value may be output from the first terminal to the printing device at the third timing. This embodiment provides the same effect as the embodiment (18) above.

[0222] (21) In the above embodiment, if the short circuit between the first terminal and the second terminal is resolved after the first timing and before the second timing, a voltage different from the first expected value may be output from the first terminal to the printing device at the first timing, a voltage equal to the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage equal to the third expected value may be output from the first terminal to the printing device at the third timing. This embodiment provides the same effect as the embodiment (18) above.

[0223] (22) In the above embodiment, if the short circuit between the first terminal and the second terminal is resolved after the second timing and before the third timing, a voltage different from the first expected value may be output from the first terminal to the printing device at the first timing, a voltage different from the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage equal to the third expected value may be output from the first terminal to the printing device at the third timing. This embodiment provides the same effect as the embodiment (18) above.

[0224] (23) In the above embodiment, the first terminal may be a data terminal, the second terminal may be a clock terminal, the first signal may be a first response signal that responds to the printing device, and the second signal may be a second response signal that responds to the printing device.

[0225] (24) In the above embodiment, the other terminals may include a third terminal and a fourth terminal, a reset signal including a low voltage and a high voltage is input to the third terminal, and a power supply voltage is input to the fourth terminal. According to this embodiment, the printing device can determine, using a device, that the first terminal is not short-circuited with the second terminal, the third terminal, and the fourth terminal included in the other terminals, and that a liquid container is attached to the printing device.

[0226] (25) In the above-described embodiment, when the first terminal and the third terminal are short-circuited or when the first terminal and the fourth terminal are short-circuited, a voltage different from the first expected value may be output from the first terminal to the printing device at the first timing, a voltage equal to the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage different from the third expected value may be output from the first terminal to the printing device at the third timing. This embodiment provides the same effect as the embodiment (18) above.

[0227] (26) In the above embodiment, when the first terminal and the third terminal are short-circuited or when the first terminal and the fourth terminal are short-circuited after the first timing and before the second timing, a voltage equal to the first expected value may be output from the first terminal to the printing device at the first timing, a voltage equal to the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage different from the third expected value may be output from the first terminal to the printing device at the third timing. This embodiment provides the same effect as the embodiment (18) above.

[0228] (27) In the above embodiment, when the first terminal and the third terminal are short-circuited or when the first terminal and the fourth terminal are short-circuited after the second timing and before the third timing, a voltage equal to the first expected value may be output from the first terminal to the printing device at the first timing, a voltage equal to the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage different from the third expected value may be output from the first terminal to the printing device at the third timing. This embodiment provides the same effect as the embodiment (18) above.

[0229] (28) In the above embodiment, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated after the first timing and before the second timing, a voltage different from the first expected value may be output from the first terminal to the printing device at the first timing, a voltage equal to the second expected value may be output from the first terminal to the printing device at the second timing, and a voltage equal to the third expected value may be output from the first terminal to the printing device at the third timing. This embodiment provides the same effect as the embodiment (18) above.

[0230] (29) According to the above aspect, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated after the second timing and before the third timing, a signal different from the first expected value may be output from the first terminal to the printing device at the first timing, a signal equal to the second expected value may be output from the first terminal to the printing device at the second timing, and a signal equal to the third expected value may be output from the first terminal to the printing device at the third timing. This aspect has the same effect as the aspect (18) above.

[0231] In addition to the above aspects, the present disclosure can be realized in the form of a liquid storage container, a system, a substrate or use of a liquid storage container, a method of controlling a device, a substrate, a system, or the like. [Explanation of symbols]

[0232] 4, 4C, 4z...housing section, 5...print head, 6...liquid introduction section, 20, 20A, 20C...printing device, 22...motor, 26...roller, 30...carriage, 31...cable, 32...carriage motor, 34...sliding shaft, 36...drive belt, 38...pulley, 39...control unit, 40...main control section, 45...connection bus, 46...bus, 50...sub-control section, 61...case, 65...mounting chamber, 70...operation section, 80...connector, 89, 89a...corner section, 90...computer, 100, 100A to 100F, 100T, 100g, 100h, 100p to 100s, 100 w, 100x, 100y, 100z...liquid storage container, 101...liquid storage body, 101wf...first wall, 101wr...second wall, 101wb...third wall, 101wu...fourth wall, 101wsa...fifth wall, 101wsb...sixth wall, 101ya...liquid storage body, 101yb...adapter, 104...liquid supply unit, 104f...film, 104op...liquid supply port, 105...liquid flow pipe, 106...protective tube, 107...bath, 110...liquid detection member, 111...liquid storage bag, 112...connecting member, 120, 120A, 120Td, 120U, 120V, 120X, 120ab, 120 ac, 120ad, 120ae, 120c, 120d, 120f, 120g, 120j, 120k...substrate, 120UA...first substrate area, 120UB...second substrate area, 120UC...third substrate area, 120UD...fourth substrate area, 120a...first protrusion, 120fa...front surface, 120fb...back surface, 122...hole, 123...slit, 124a...first substrate, 124b...second substrate, 127...battery, 130, 130A to 130F...device, 134...opening, 136, 136A...processing section, 136a...first processing section, 136b...second processing section, 138...storage section, 139...resin, 1 50...ink chamber, 201...main body, 210...data terminal, 220...clock terminal, 230...power terminal, 240...reset terminal, 250, 250a, 250b, 250c, 250d,...ground terminal, 290...terminal, 301...slit, 310...first cartridge engaging portion, 320...second cartridge engaging portion, 400...connection mechanism, 403-403E...contact portion forming member, 405...terminal holding portion, 410...device side terminal, 411...determination portion, 412...determination portion, 412...mounting determination portion, 414...short circuit determination portion, 415...CPU, 416...device side first memory portion, 420, 430, 440,450, 490...Device side terminal, 421...Determination unit, 424...Opening, 425...Container side engagement structure, 431 to 434, 439...Relay terminal, 441...Power supply, 474...Attachment / detachment opening, 495...Display panel, 500...Sub-control board, 510, 520, 530, 540, 550, 590...Sub-control board terminal 511...Switching unit, 516...Device side second memory unit, 600...Cartridge mounting unit, 812, 822...Liquid circulation pipe, 814...Liquid storage Retaining portion, 824...liquid container, 990...substrate holding portion, 1000, 1000A, 1000B, 1000C, 1000D, 1000E...printing system, BCC1...first execution command, BCC2...second execution command, C1...first virtual line, C2...second virtual line, CMP...center portion, CMT...command period, D1 to D9...cycle, DB1...first identification data, DB2...second identification data, HSDA, HSDA1 to HSDA6, H VDD, HVDD1 to HVDD4, HVDD6, HRST, HRST1 to HRST4, HRST6, HSCK, HSCK1 to HSCK4, HSCK6, HVSS... host terminals, LSDA, LSDA1 to LSDA6... data lines, LVDD, LVDD1 to LVDD4, LVDD6... power lines, LRST, LRST1 to LRST4, LRST6... reset lines, LSCK, LSCK1 to LSCK4, LSCK6... clock Clock line, LVSS...ground line, MD...mounting direction, MD1...first mounting direction, MD2...second mounting direction, MP...midpoint, P1...first parity data, P2...second parity data, PA...printing media, R1...first row, R2...second row, RD...rotation mounting direction, RS...request signal, RST...reset signal, Rg1...first area, Rg2...second area, Rp...rotation center, SCK...clock signal, FD...first direction, SD...second direction, SDA,SDA1 to SDA6...data signals, SL...second line, SS...second response signal, TL...third line, VDD...power supply voltage, VSS...ground potential, Vcr...virtual circle, Wa...distance, cp...contact, cp1...first contact, cp2...second contact, cp3...third contact, cp4...fourth contact, cp5...fifth contact, cpc...clock contact, cpd...data contact, cpr...reset contact, cpvd...power contact, cpvs...ground contact, dcpc...device side clock contact, dcpd...device side data contact, dcpr...device side reset contact, dcpvd...device side power contact, dcpvs...device side ground contact, t1...first timing, t2...second timing, t3...third timing, ta, tb...timing,

Claims

1. A device configured to be electrically connected to multiple terminals of a liquid storage container attached to a storage section of a printing device having a print head, a liquid introduction section that introduces liquid into the print head, a storage section in which the liquid introduction section is provided, and multiple device-side terminals provided in the storage section, and configured to satisfy I, II, III, and IV described below. I a first signal including a first low voltage; a second signal including a second low voltage and a second high voltage higher than the second low voltage; is output to a first terminal included in the plurality of terminals. II The first signal and the second signal are used by the printing device to determine that the first terminal and any other terminal included in the plurality of terminals other than the first terminal are not short-circuited, and that the liquid container is attached to the printing device. III outputting the first signal to the first terminal; After outputting the first signal, the second signal is output to the first terminal. IV a clock signal in which a low voltage and a high voltage are alternately repeated at a predetermined cycle is input to a second terminal included in the other terminals; outputting the first low voltage to the first terminal at a first timing in a period in which the voltage input to the second terminal is the high voltage; after outputting the first low voltage, outputting the second high voltage to the first terminal at a second timing during a period in which the voltage input to the second terminal is the low voltage; After the second high voltage is output, the second low voltage is output to the first terminal at a third timing during a period in which the voltage input to the second terminal is the high voltage.

2. 10. The device of claim 1, When the first terminal and the other terminal are not short-circuited, the device outputs the first low voltage to the first terminal before the first timing during the period of the high voltage in one cycle of the clock signal.

3. 3. A device according to claim 1 or claim 2, When the first terminal and the other terminal are not short-circuited, the device outputs the second high voltage to the first terminal before the second timing during the low voltage period in one cycle of the clock signal.

4. A device according to any one of claims 1 to 3, When the first terminal and the other terminal are not short-circuited, the device outputs the second low voltage to the first terminal before the third timing during the high voltage period in one cycle of the clock signal.

5. A device according to any one of claims 1 to 4, When the first terminal and the other terminal are not short-circuited, in one cycle of the clock signal, When the voltage input to the second terminal changes from the high voltage to the low voltage, the second high voltage is output to the first terminal; The device outputs the second low voltage to the first terminal when the voltage input to the second terminal changes from the low voltage to the high voltage.

6. A device according to any one of claims 1 to 5, A device that outputs the first low voltage to the first terminal when the voltage input to the second terminal changes from the low voltage to the high voltage when the first terminal and the other terminal are not short-circuited.

7. A device according to any one of claims 1 to 6, A device that performs steps III and IV multiple times.

8. A device according to any one of claims 1 to 7, When the printing device receives a second print instruction while printing based on a first print instruction, the device outputs the first signal and the second signal to the first terminal after printing based on the first print instruction is completed and before starting printing based on the second print instruction.

9. A device according to any one of claims 1 to 8, a device that, when the printing apparatus receives an instruction to clean the print head, outputs the first signal and the second signal to the first terminal before performing the cleaning;

10. A device according to any one of claims 1 to 9, the storage unit outputs the first signal and the second signal to the first terminal at an exchange position where the liquid storage container can be exchanged; When the container is moved from the replacement position to a standby position where the liquid container cannot be replaced, the device outputs the first signal and the second signal to the first terminal.

11. A device according to any one of claims 1 to 10, the first terminal is a data terminal, the second terminal is a clock terminal, the first signal is a first response signal sent to the printing device; The second signal is a second response signal that responds to the printing device.

12. A device according to any one of claims 1 to 11, The device stores information about the liquid contained in the liquid container.

13. A device according to any one of claims 1 to 12, a third terminal included in the other terminals receives a reset signal including a low voltage and a high voltage; A device in which a power supply voltage is input to a fourth terminal included in the other terminals.

14. 14. The device of claim 13, After the power supply voltage is input to the fourth terminal, the reset signal changes from the low voltage to the high voltage, whereby the high voltage is input to the third terminal; After the high voltage of the reset signal is input to the third terminal, the clock signal is input to the second terminal; The device, wherein the first signal is input to the first terminal after the high voltage of the reset signal is input to the third terminal.

15. 15. A device according to claim 13 or claim 14, The power supply voltage supplied to the fourth terminal is used to drive the device.

16. A device according to any one of claims 13 to 15, the third terminal is a reset terminal, The device, wherein the fourth terminal is a power terminal.

17. a substrate that is attached to a printing device that includes a print head, a liquid introduction section that introduces liquid into the print head, a storage section that is provided with the liquid introduction section and that stores a liquid storage container, and a plurality of device-side terminals that are provided in the storage section, and that is configured to come into contact with the plurality of device-side terminals, A substrate; a device provided on the substrate; a plurality of terminals provided on the substrate and electrically connected to the device; the plurality of terminals include a first terminal and other terminals including a second terminal; A substrate configured to satisfy I, II, III, and IV below. I The device comprises: a first signal including a first low voltage; a second signal including a second low voltage and a second high voltage higher than the second low voltage; is output from the first terminal to the printing device. II The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the board is installed in the printing device. III The device comprises: outputting the first signal to the first terminal; After outputting the first signal, the second signal is output to the first terminal. IV When the first terminal and the other terminal are not short-circuited, a clock signal in which low voltage and high voltage are alternately repeated at a predetermined cycle is input from the printing device to the second terminal; outputting the first low voltage as a first expected value from the first terminal to the printing device at a first timing in a period in which the voltage input to the second terminal is the high voltage; After outputting the first low voltage, at a second timing during which the voltage input to the second terminal is the low voltage, outputting the second high voltage as a second expected value from the first terminal to the printing device; After outputting the second high voltage, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value.

18. 18. The substrate of claim 17, When the first terminal and the other terminal are not short-circuited, the first low voltage is output to the first terminal before the first timing during the high voltage period in one cycle of the clock signal.

19. 19. The substrate according to claim 17 or claim 18, When the first terminal and the other terminal are not short-circuited, the second high voltage is output to the first terminal before the second timing during the low voltage period in one cycle of the clock signal.

20. 20. The substrate according to any one of claims 17 to 19, When the first terminal and the other terminal are not short-circuited, the low voltage is output to the first terminal before the third timing during the high voltage period in one cycle of the clock signal.

21. 21. The substrate according to any one of claims 17 to 20, When the first terminal and the other terminal are not short-circuited, in one cycle of the clock signal, When the voltage input to the second terminal changes from the high voltage to the low voltage, the second high voltage is output to the first terminal; a substrate that outputs the second low voltage to the first terminal when the voltage input to the second terminal changes from the low voltage to the high voltage;

22. 22. The substrate according to any one of claims 17 to 21, When the first terminal and the other terminal are not short-circuited, if the voltage input to the second terminal changes from the low voltage to the high voltage, the substrate outputs the first low voltage to the first terminal.

23. 23. The substrate according to any one of claims 17 to 22, When the first terminal and the second terminal are short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

24. 24. The substrate according to any one of claims 17 to 23, If the first terminal and the second terminal are short-circuited after the first timing and before the second timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

25. 25. The substrate according to any one of claims 17 to 24, If the first terminal and the second terminal are short-circuited after the second timing and before the third timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

26. 26. The substrate according to any one of claims 17 to 25, If the short circuit between the first terminal and the second terminal is resolved after the first timing and before the second timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

27. 27. The substrate according to any one of claims 17 to 26, If the short circuit between the first terminal and the second terminal is resolved after the second timing and before the third timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

28. 28. The substrate according to any one of claims 17 to 27, the first terminal is a data terminal, the second terminal is a clock terminal, the first signal is a first response signal sent to the printing device; The second signal is a second response signal responsive to the printing device.

29. 29. The substrate according to any one of claims 17 to 28, the other terminals include a third terminal and a fourth terminal, a reset signal including a low voltage and a high voltage is input to the third terminal; A power supply voltage is input to the fourth terminal of the substrate.

30. 30. The substrate of claim 29, When at least one of the first terminal and the third terminal is short-circuited and the first terminal and the fourth terminal is short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

31. 31. The substrate of claim 29 or claim 30, After the first timing and before the second timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

32. 32. The substrate according to any one of claims 29 to 31, During a period from after the second timing until before the third timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

33. 33. The substrate according to any one of claims 29 to 32, After the first timing and before the second timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A board that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

34. 34. The substrate of any one of claims 29 to 33, After the second timing and before the third timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a signal different from the first expected value from the first terminal to the printing device at the first timing; outputting a signal equal to the second expected value from the first terminal to the printing device at the second timing; A substrate that outputs a signal that is the same as the third expected value from the first terminal to the printing device at the third timing.

35. 35. The substrate of any one of claims 29 to 34, After the power supply voltage is input to the fourth terminal, the reset signal changes from the low voltage to the high voltage, whereby the high voltage is input to the third terminal; After the high voltage of the reset signal is input to the third terminal, the clock signal is input to the second terminal; After the high voltage of the reset signal is input to the third terminal, the first signal is input to the first terminal.

36. 36. The substrate of any one of claims 29 to 35, The power supply voltage supplied to the fourth terminal is used to drive the device.

37. 37. The substrate of any one of claims 29 to 36, the third terminal is a reset terminal, The fourth terminal is a power supply terminal.

38. 38. The substrate of any one of claims 17 to 37, In the case of at least one of the following (i) to (iii), the substrate is subjected to the steps III and IV multiple times. (i) when a voltage different from the first expected value is output from the first terminal to the printing device at the first timing; (ii) when a voltage equal to the second expected value is output from the first terminal to the printing device at the second timing; (iii) A voltage equal to the third expected value is output from the first terminal to the printing device at the third timing.

39. 39. The substrate of any one of claims 17 to 38, A substrate that, when the printing device receives a second print instruction while printing based on a first print instruction, outputs the first signal and the second signal to the first terminal after printing based on the first print instruction is completed and before starting printing based on the second print instruction.

40. 40. The substrate of any one of claims 17 to 39, When the printing device receives an instruction to clean the print head, the substrate outputs the first signal and the second signal to the first terminal before performing the cleaning.

41. 41. The substrate of any one of claims 17 to 40, the storage unit outputs the first signal and the second signal to the first terminal when the storage unit is at an exchange position where the liquid storage container can be exchanged; When the container is moved from the replacement position to a standby position where the liquid container cannot be replaced, the substrate outputs the first signal and the second signal to the first terminal.

42. 42. The substrate of any one of claims 17 to 41, The device stores information about the liquid contained in the liquid container.

43. a liquid container attached to a storage section of a printing device, the liquid container comprising: a print head; a liquid introduction section that introduces liquid into the print head; a storage section in which the liquid introduction section is provided; and a plurality of device-side terminals that are provided in the storage section, a liquid container capable of containing liquid; a liquid supply unit attached to the liquid introduction unit of the printing device and having a liquid supply port that supplies liquid from the liquid container to the liquid introduction unit of the printing device; a device; a plurality of terminals electrically connected to the device; the plurality of terminals include a first terminal and other terminals including a second terminal; A liquid storage container configured to satisfy the following items I, II, III, and IV. I The device comprises: a first signal including a first low voltage; a second signal including a second low voltage and a second high voltage higher than the second low voltage; is output from the first terminal to the printing device. II The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the liquid container is attached to the printing device. III The device comprises: outputting the first signal from the first terminal to the printing device; After outputting the first signal, the second signal is output from the first terminal to the printing device. IV When the first terminal and the other terminal are not short-circuited, a clock signal in which low voltage and high voltage are alternately repeated at a predetermined cycle is input from the printing device to the second terminal; outputting the first low voltage as a first expected value from the first terminal to the printing device at a first timing in a period in which the voltage input to the second terminal is the high voltage; After outputting the first low voltage, at a second timing during which the voltage input to the second terminal is the low voltage, outputting the second high voltage as a second expected value from the first terminal to the printing device; After the second high voltage is output, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value.

44. 44. The liquid container according to claim 43, A liquid container that outputs the first low voltage to the first terminal before the first timing during the high voltage period in one cycle of the clock signal when the first terminal and the other terminal are not short-circuited.

45. 45. The liquid storage container according to claim 43 or 44, A liquid container that outputs the second high voltage to the first terminal before the second timing during the low voltage period in one cycle of the clock signal when the first terminal and the other terminal are not short-circuited.

46. 46. ​​A liquid storage container according to any one of claims 43 to 45, A liquid container that outputs the second low voltage to the first terminal before the third timing during the high voltage period in one cycle of the clock signal when the first terminal and the other terminal are not short-circuited.

47. 47. A liquid storage container according to any one of claims 43 to 46, When the first terminal and the other terminal are not short-circuited, in one cycle of the clock signal, When the voltage input to the second terminal changes from the high voltage to the low voltage, the second high voltage is output to the first terminal; When the voltage input to the second terminal changes from the low voltage to the high voltage, the liquid container outputs the second low voltage to the first terminal.

48. 48. A liquid storage container according to any one of claims 43 to 47, A liquid storage container that outputs the first low voltage to the first terminal when the voltage input to the second terminal changes from the low voltage to the high voltage when the first terminal and the other terminal are not short-circuited.

49. 49. A liquid storage container according to any one of claims 43 to 48, When the first terminal and the second terminal are short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; The liquid container outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

50. 50. A liquid storage container according to any one of claims 43 to 49, If the first terminal and the second terminal are short-circuited after the first timing and before the second timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; The liquid container outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

51. 51. A liquid storage container according to any one of claims 43 to 50, If the first terminal and the second terminal are short-circuited after the second timing and before the third timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; The liquid container outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

52. 52. A liquid storage container according to any one of claims 43 to 51, If the short circuit between the first terminal and the second terminal is resolved after the first timing and before the second timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

53. 53. A liquid storage container according to any one of claims 43 to 52, If the short circuit between the first terminal and the second terminal is resolved after the second timing and before the third timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A liquid container that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

54. 54. A liquid storage container according to any one of claims 43 to 53, the first terminal is a data terminal, the second terminal is a clock terminal, the first signal is a first response signal sent to the printing device; The second signal is a second response signal that is sent to the printing device.

55. 55. A liquid storage container according to any one of claims 43 to 54, the other terminals include a third terminal and a fourth terminal, a reset signal including a low voltage and a high voltage is input to the third terminal; A power supply voltage is input to the fourth terminal of the liquid container.

56. 56. The liquid container according to claim 55, When at least one of the first terminal and the third terminal is short-circuited and the first terminal and the fourth terminal is short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; The liquid container outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

57. 57. The liquid storage container according to claim 55 or 56, The liquid storage container is After the first timing and before the second timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, At the first timing, a signal voltage signal equal to the first expected value is output from the first terminal to the printing device; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; The liquid container outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

58. 58. A liquid storage container according to any one of claims 55 to 57, During a period from after the second timing until before the third timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; The liquid container outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

59. 59. A liquid storage container according to any one of claims 55 to 58, After the first timing and before the second timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

60. 60. A liquid storage container according to any one of claims 55 to 59, After the second timing and before the third timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

61. 61. A liquid storage container according to any one of claims 55 to 60, After the power supply voltage is input to the fourth terminal, the reset signal changes from the low voltage to the high voltage, whereby the high voltage is input to the third terminal; After the high voltage of the reset signal is input to the third terminal, the clock signal is input to the second terminal; The liquid container, wherein the first signal is input to the first terminal after the high voltage of the reset signal is input to the third terminal.

62. 62. A liquid storage container according to claim 55 to claim 61, The power supply voltage supplied to the fourth terminal is used to drive the device.

63. 63. A liquid storage container according to any one of claims 55 to 62, the third terminal is a reset terminal, The liquid container, wherein the fourth terminal is a power supply terminal.

64. 64. A liquid storage container according to any one of claims 43 to 63, A liquid storage container, wherein in at least one of the cases (i) to (iii) described below, steps III and IV are carried out multiple times. (i) when a voltage different from the first expected value is output from the first terminal to the printing device at the first timing; (ii) when a voltage equal to the second expected value is output from the first terminal to the printing device at the second timing; (iii) A voltage equal to the third expected value is output from the first terminal to the printing device at the third timing.

65. 65. A liquid storage container according to any one of claims 43 to 64, A liquid storage container that, when the printing device receives a second print instruction while printing based on a first print instruction, outputs the first signal and the second signal to the first terminal after printing based on the first print instruction is completed and before starting printing based on the second print instruction.

66. 66. A liquid storage container according to any one of claims 43 to 65, A liquid container that outputs the first signal and the second signal to the first terminal when the printing device receives an instruction to clean the print head and before performing the cleaning.

67. 67. A liquid storage container according to any one of claims 43 to 66, the storage unit outputs the first signal and the second signal to the first terminal at an exchange position where the liquid storage container can be exchanged; When the container is moved from the replacement position to a standby position where the liquid container cannot be replaced, the container outputs the first signal and the second signal to the first terminal.

68. 68. A liquid storage container according to any one of claims 43 to 67, The liquid container, wherein the device stores information about the liquid contained in the liquid container.

69. 1. A printing system comprising: a printing device, a liquid container capable of containing a liquid, a liquid supply unit having a liquid supply port, a device, a plurality of terminals connected to the device, and a substrate on which the device and the plurality of terminals are provided; the printing device includes a print head, a liquid introduction section that introduces liquid into the print head, and a plurality of device-side terminals; a liquid supply port of the liquid container that supplies liquid from the liquid container to the liquid introduction portion of the printing device; the substrate is configured to be attached to the printing device and to come into contact with the plurality of device-side terminals; the plurality of terminals include a first terminal and other terminals including a second terminal; A printing system configured to satisfy items I, II, III, and IV below. I The device comprises: a first signal including a first low voltage; a second signal including a second low voltage and a second high voltage higher than the second low voltage; is output from the first terminal to the printing device. II The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the board is installed in the printing device. III The device comprises: outputting the first signal from the first terminal to the printing device; After outputting the first signal, the second signal is output from the first terminal to the printing device. IV When the first terminal and the other terminal are not short-circuited, a clock signal in which low voltage and high voltage are alternately repeated at a predetermined cycle is input from the printing device to the second terminal; At a first timing in a period in which the voltage input to the second terminal is the high voltage, the first terminal outputs the first low voltage as a first expected value to the printing device; After outputting the first low voltage, at a second timing during a period in which the voltage input to the second terminal is the low voltage, the first terminal outputs the second high voltage to the printing device as a second expected value; After the second high voltage is output, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the first terminal outputs the second low voltage to the printing device as a third expected value.

70. 70. The printing system of claim 69, When the first terminal and the other terminal are not short-circuited, the first low voltage is output to the first terminal before the first timing during the high voltage period in one cycle of the clock signal.

71. 71. A printing system according to claim 69 or claim 70, When the first terminal and the other terminal are not short-circuited, the second high voltage is output to the first terminal during the low voltage period in one cycle of the clock signal, before the second timing.

72. 72. A printing system according to any one of claims 69 to 71, When the first terminal and the other terminal are not short-circuited, the second low voltage is output to the first terminal before the third timing during the high voltage period in one cycle of the clock signal.

73. 73. A printing system according to any one of claims 69 to 72, comprising: When the first terminal and the other terminal are not short-circuited, in one cycle of the clock signal, When the voltage input to the second terminal changes from the high voltage to the low voltage, the second high voltage is output to the first terminal; When the voltage input to the second terminal changes from the low voltage to the high voltage, the printing system outputs the second low voltage to the first terminal.

74. 74. A printing system according to any one of claims 69 to 73, comprising: When the first terminal and the other terminal are not short-circuited, if the voltage input to the second terminal changes from the low voltage to the high voltage, the printing system outputs the first low voltage to the first terminal.

75. 75. A printing system according to any one of claims 69 to 74, comprising: When the first terminal and the second terminal are short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

76. 76. A printing system according to any one of claims 69 to 75, comprising: If the first terminal and the second terminal are short-circuited after the first timing and before the second timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

77. 77. A printing system according to any one of claims 69 to 76, comprising: If the first terminal and the second terminal are short-circuited after the second timing and before the third timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

78. 78. A printing system according to any one of claims 69 to 77, comprising: If the short circuit between the first terminal and the second terminal is resolved after the first timing and before the second timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

79. 79. A printing system according to any one of claims 69 to 78, comprising: If the short circuit between the first terminal and the second terminal is resolved after the second timing and before the third timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

80. 80. A printing system according to any one of claims 69 to 79, comprising: the first terminal is a data terminal, the second terminal is a clock terminal, the first signal is a first response signal sent to the printing device; A printing system, wherein the second signal is a second response signal that is sent to the printing device.

81. 81. A printing system according to any one of claims 69 to 80, comprising: the other terminals include a third terminal and a fourth terminal, a reset signal including a low voltage and a high voltage is input to the third terminal; A printing system, wherein a power supply voltage is input to the fourth terminal.

82. 82. The printing system of claim 81, When at least one of the first terminal and the third terminal is short-circuited and the first terminal and the fourth terminal is short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

83. 83. A printing system according to claim 81 or claim 82, comprising: After the first timing and before the second timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

84. 84. A printing system according to any one of claims 81 to 83, During a period from after the second timing until before the third timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

85. 85. A printing system according to any one of claims 81 to 84, comprising: After the first timing and before the second timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

86. 86. A printing system according to any one of claims 81 to 85, After the second timing and before the third timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

87. 87. A printing system according to any one of claims 81 to 86, comprising: After the power supply voltage is input to the fourth terminal, the reset signal changes from the low voltage to the high voltage, whereby the high voltage is input to the third terminal; After the high voltage of the reset signal is input to the third terminal, the clock signal is input to the second terminal; a printing system in which the first signal is input to the first terminal after the high voltage of the reset signal is input to the third terminal;

88. A printing system according to any one of claims 81 to 87, The power supply voltage supplied to the fourth terminal is used to drive the device.

89. 89. A printing system according to any one of claims 81 to 88, comprising: the third terminal is a reset terminal, The fourth terminal is a power supply terminal.

90. 89. A printing system according to any one of claims 69 to 89, A printing system, wherein, in at least one of the following cases (i) to (iii), steps III and IV are performed multiple times. (i) when a voltage different from the first expected value is output from the first terminal to the printing device at the first timing; (ii) when a voltage equal to the second expected value is output from the first terminal to the printing device at the second timing; (iii) A voltage equal to the third expected value is output from the first terminal to the printing device at the third timing.

91. 91. A printing system according to any one of claims 69 to 90, A printing system in which, when the printing device receives a second print instruction while printing based on a first print instruction, the printing device outputs the first signal and the second signal to the first terminal after printing based on the first print instruction is completed and before starting printing based on the second print instruction.

92. 92. A printing system according to any one of claims 69 to 91, When the printing device receives an instruction to clean the print head, the printing system outputs the first signal and the second signal to the first terminal before performing the cleaning.

93. 93. A printing system according to any one of claims 69 to 92, comprising: the printing device further includes a housing section in which the liquid introduction section is provided and which houses the substrate; When the accommodation unit is at an exchange position where the substrate can be exchanged, the first signal and the second signal are output to the first terminal; When the accommodation unit moves from the replacement position to a standby position where the substrate cannot be replaced, the first signal and the second signal are output to the first terminal.

94. 94. A printing system according to any one of claims 69 to 93, comprising: A printing system, wherein the device stores information about the fluid.

95. 1. A printing system comprising: A printing device and a liquid container attached to the printing device, the printing device includes a print head, a liquid introduction section that introduces liquid into the print head, and a plurality of device-side terminals; the liquid container comprises a liquid container capable of containing liquid, a liquid supply unit having a liquid supply port that supplies liquid from the liquid container to the liquid introduction unit of the printing device, a device, and a plurality of terminals connected to the device; the plurality of terminals include a first terminal and other terminals including a second terminal; A printing system configured to satisfy items I, II, III, and IV below. I The device comprises: a first signal including a first low voltage; a second signal including a second low voltage and a second high voltage higher than the second low voltage; is output from the first terminal to the printing device. II The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the liquid container is attached to the printing device. III The device comprises: outputting the first signal from the first terminal to the printing device; After outputting the first signal, the second signal is output from the first terminal to the printing device. IV When the first terminal and the other terminal are not short-circuited, a clock signal in which low voltage and high voltage are alternately repeated at a predetermined cycle is input from the printing device to the second terminal; At a first timing in a period in which the voltage input to the second terminal is the high voltage, the first terminal outputs the first low voltage as a first expected value to the printing device; After outputting the first low voltage, at a second timing during a period in which the voltage input to the second terminal is the low voltage, the first terminal outputs the second high voltage to the printing device as a second expected value; After the second high voltage is output, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the first terminal outputs the second low voltage to the printing device as a third expected value.

96. 96. The printing system of claim 95, When the first terminal and the other terminal are not short-circuited, the first low voltage is output to the first terminal before the first timing during the high voltage period in one cycle of the clock signal.

97. 97. A printing system according to claim 95 or claim 96, When the first terminal and the other terminal are not short-circuited, the second high voltage is output to the first terminal during the low voltage period in one cycle of the clock signal, before the second timing.

98. 98. A printing system according to any one of claims 95 to 97, When the first terminal and the other terminal are not short-circuited, the second low voltage is output to the first terminal before the third timing during the high voltage period in one cycle of the clock signal.

99. 99. A printing system according to any one of claims 95 to 98, comprising: When the first terminal and the other terminal are not short-circuited, in one cycle of the clock signal, When the voltage input to the second terminal changes from the high voltage to the low voltage, the second high voltage is output to the first terminal; When the voltage input to the second terminal changes from the low voltage to the high voltage, the printing system outputs the second low voltage to the first terminal.

100. 99. A printing system according to any one of claims 95 to 99, When the first terminal and the other terminal are not short-circuited, if the voltage input to the second terminal changes from the low voltage to the high voltage, the printing system outputs the first low voltage to the first terminal.

101. 101. A printing system according to any one of claims 95 to 100, comprising: When the first terminal and the second terminal are short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

102. 102. A printing system according to any one of claims 95 to 101, If the first terminal and the second terminal are short-circuited after the first timing and before the second timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

103. 103. A printing system according to any one of claims 95 to 102, comprising: If the first terminal and the second terminal are short-circuited after the second timing and before the third timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

104. 104. A printing system according to any one of claims 95 to 103, comprising: If the short circuit between the first terminal and the second terminal is resolved after the first timing and before the second timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

105. 105. A printing system according to any one of claims 95 to 104, comprising: If the short circuit between the first terminal and the second terminal is resolved after the second timing and before the third timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

106. 106. A printing system according to any one of claims 95 to 105, comprising: the first terminal is a data terminal, the second terminal is a clock terminal, the first signal is a first response signal sent to the printing device; A printing system, wherein the second signal is a second response signal that is sent to the printing device.

107. 107. A printing system according to any one of claims 95 to 106, comprising: the other terminals include a third terminal and a fourth terminal, a reset signal including a low voltage and a high voltage is input to the third terminal; A printing system, wherein a power supply voltage is input to the fourth terminal.

108. 108. The printing system of claim 107, When at least one of the first terminal and the third terminal is short-circuited and the first terminal and the fourth terminal is short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

109. 109. A printing system according to claim 107 or claim 108, comprising: After the first timing and before the second timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

110. 110. A printing system according to any one of claims 107 to 109, comprising: During a period from after the second timing until before the third timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

111. 111. A printing system according to any one of claims 107 to 110, comprising: After the first timing and before the second timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

112. A printing system according to any one of claims 107 to 111, After the second timing and before the third timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A printing system that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

113. 113. A printing system according to any one of claims 107 to 112, comprising: After the power supply voltage of the reset signal is input to the fourth terminal, the reset signal changes from the low voltage to the high voltage, whereby the high voltage is input to the third terminal; After the high voltage of the reset signal is input to the third terminal, the clock signal is input to the second terminal; a printing system in which the high voltage is input to the third terminal, and then the first signal is input to the first terminal;

114. A printing system according to any one of claims 107 to 113, comprising: The power supply voltage supplied to the fourth terminal is used to drive the device.

115. 115. A printing system according to any one of claims 107 to 114, comprising: the third terminal is a reset terminal, The fourth terminal is a power supply terminal.

116. 116. A printing system according to any one of claims 95 to 115, comprising: A printing system, wherein, in at least one of the following cases (i) to (iii), steps III and IV are performed multiple times. (i) when a voltage different from the first expected value is output from the first terminal to the printing device at the first timing; (ii) when a voltage equal to the second expected value is output from the first terminal to the printing device at the second timing; (iii) A voltage equal to the third expected value is output from the first terminal to the printing device at the third timing.

117. 117. A printing system according to any one of claims 95 to 116, comprising: A printing system in which, when the printing device receives a second print instruction while printing based on a first print instruction, the printing device outputs the first signal and the second signal to the first terminal after printing based on the first print instruction is completed and before starting printing based on the second print instruction.

118. 118. A printing system according to any one of claims 95 to 117, comprising: When the printing device receives an instruction to clean the print head, the printing system outputs the first signal and the second signal to the first terminal before performing the cleaning.

119. 118. A printing system according to any one of claims 95 to 118, comprising: the printing device further includes a storage section in which the liquid introduction section is provided and which stores the liquid storage container; the storage unit outputs the first signal and the second signal to the first terminal at an exchange position where the liquid storage container can be exchanged; When the container is moved from the replacement position to a standby position where the liquid container cannot be replaced, the printing system outputs the first signal and the second signal to the first terminal.

120. 120. A printing system according to any one of claims 95 to 119, comprising: A printing system, wherein the device stores information about the liquid contained in the liquid container.

121. A use of a substrate that is attached to a printing device that includes a print head, a liquid introduction section that introduces liquid into the print head, a storage section that is provided with the liquid introduction section and that stores a liquid storage container, and a plurality of device-side terminals that are provided in the storage section, and that is configured to come into contact with the plurality of device-side terminals, A substrate; a device provided on the substrate; a plurality of terminals electrically connected to the device; the plurality of terminals include a first terminal and other terminals including a second terminal; Use of a substrate configured to satisfy I, II, III, and IV below. I The device comprises: a first signal including a first low voltage; a second signal including a second low voltage and a second high voltage higher than the second low voltage; is output from the first terminal to the printing device. II The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the board is installed in the printing device. III The device comprises: outputting the first signal from the first terminal to the printing device; After outputting the first signal, the second signal is output from the first terminal to the printing device. IV When the first terminal and the other terminal are not short-circuited, a clock signal in which low voltage and high voltage are alternately repeated at a predetermined cycle is input from the printing device to the second terminal; outputting the first low voltage as a first expected value from the first terminal to the printing device at a first timing in a period in which the voltage input to the second terminal is the high voltage; After outputting the first low voltage, at a second timing during which the voltage input to the second terminal is the low voltage, outputting the second high voltage as a second expected value from the first terminal to the printing device; After outputting the second high voltage, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value.

122. 122. Use of the substrate of claim 121, Use of a substrate that outputs the first low voltage to the first terminal before the first timing during the period of the high voltage in one cycle of the clock signal when the first terminal and the other terminal are not short-circuited.

123. Use of a substrate according to claim 121 or claim 122, comprising: Use of a substrate, wherein when the first terminal and the other terminal are not short-circuited, the second high voltage is output to the first terminal before the second timing during the low voltage period in one cycle of the clock signal.

124. Use of a substrate according to any one of claims 121 to 123, Use of a substrate, wherein when the first terminal and the other terminal are not short-circuited, the second low voltage is output to the first terminal before the third timing during the period of the high voltage in one cycle of the clock signal.

125. Use of a substrate according to any one of claims 121 to 124, When the first terminal and the other terminal are not short-circuited, in one cycle of the clock signal, When the voltage input to the second terminal changes from the high voltage to the low voltage, the second high voltage is output to the first terminal; When the voltage input to the second terminal changes from the low voltage to the high voltage, the second low voltage is output to the first terminal.

126. Use of a substrate according to any one of claims 121 to 125, When the first terminal and the other terminal are not short-circuited, if the voltage input to the second terminal changes from the low voltage to the high voltage, the first low voltage is output to the first terminal.

127. Use of a substrate according to any one of claims 121 to 126, comprising: When the first terminal and the second terminal are short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

128. Use of a substrate according to any one of claims 121 to 127, comprising: If the first terminal and the second terminal are short-circuited after the first timing and before the second timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

129. Use of a substrate according to any one of claims 121 to 128, comprising: If the first terminal and the second terminal are short-circuited after the second timing and before the third timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

130. Use of a substrate according to any one of claims 121 to 129, comprising: If the short circuit between the first terminal and the second terminal is resolved after the first timing and before the second timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

131. Use of a substrate according to any one of claims 121 to 130, comprising: If the short circuit between the first terminal and the second terminal is resolved after the second timing and before the third timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

132. Use of a substrate according to any one of claims 121 to 131, comprising: the first terminal is a data terminal, the second terminal is a clock terminal, the first signal is a first response signal sent to the printing device; The second signal is a second response signal responsive to the printing device.

133. Use of a substrate according to any one of claims 121 to 132, comprising: the other terminals include a third terminal and a fourth terminal, a reset signal including a low voltage and a high voltage is input to the third terminal; The fourth terminal receives a power supply voltage.

134. 134. Use of the substrate of claim 133, comprising: When at least one of the first terminal and the third terminal is short-circuited and the first terminal and the fourth terminal is short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

135. Use of a substrate according to claim 133 or claim 134, comprising: After the first timing and before the second timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

136. Use of a substrate according to any one of claims 133 to 135, comprising: During a period from after the second timing until before the third timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage different from the third expected value from the first terminal to the printing device at the third timing.

137. Use of a substrate according to any one of claims 133 to 136, comprising: After the first timing and before the second timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

138. Use of a substrate according to any one of claims 133 to 137, comprising: After the second timing and before the third timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; Use of a board that outputs a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

139. Use of a substrate according to any one of claims 133 to 138, comprising: After the power supply voltage is input to the fourth terminal, the reset signal changes from the low voltage to the high voltage, whereby the high voltage is input to the third terminal; After the high voltage of the reset signal is input to the third terminal, the clock signal is input to the second terminal; Use of a substrate, wherein the first signal is input to the first terminal after the high voltage of the reset signal is input to the third terminal.

140. Use of a substrate according to claims 133 to 139, comprising: The power supply voltage supplied to the fourth terminal is used to drive the device.

141. Use of a substrate according to any one of claims 133 to 140, comprising: the third terminal is a reset terminal, The fourth terminal is a power supply terminal.

142. Use of a substrate according to any one of claims 121 to 141, comprising: In the case of at least one of the following (i) to (iii), the substrate is used, in which the steps III and IV are carried out multiple times. (i) when a voltage different from the first expected value is output from the first terminal to the printing device at the first timing; (ii) when a voltage equal to the second expected value is output from the first terminal to the printing device at the second timing; (iii) A voltage equal to the third expected value is output from the first terminal to the printing device at the third timing.

143. Use of a substrate according to any one of claims 121 to 142, comprising: Use of a substrate, in which when the printing device receives a second print instruction while printing based on a first print instruction, the first signal and the second signal are output to the first terminal after printing based on the first print instruction is completed and before starting printing based on the second print instruction.

144. Use of a substrate according to any one of claims 121 to 143, comprising: When the printing device receives an instruction to clean the print head, the substrate outputs the first signal and the second signal to the first terminal before performing the cleaning.

145. Use of a substrate according to any one of claims 121 to 144, comprising: the storage unit outputs the first signal and the second signal to the first terminal at an exchange position where the liquid storage container can be exchanged; When the container is moved from the replacement position to a standby position where the liquid container cannot be replaced, the first signal and the second signal are output to the first terminal.

146. Use of a substrate according to any one of claims 121 to 145, comprising: The device stores information about the liquid contained in the liquid container.

147. A printing device includes a print head, a liquid introduction section that introduces liquid into the print head, a container provided in the container with the liquid introduction section, and a plurality of device-side terminals provided in the container, and the container is used to store a liquid, a liquid container capable of containing liquid; a liquid supply unit attached to the liquid introduction unit of the printing device and having a liquid supply port for supplying liquid from the liquid container to the liquid introduction unit; a device; a plurality of terminals electrically connected to the device; the plurality of terminals include a first terminal and other terminals including a second terminal; Use of a liquid-containing container configured to satisfy I, II, III, and IV below. I The device comprises: a first signal including a first low voltage; a second signal including a second low voltage and a second high voltage higher than the second low voltage; is output from the first terminal to the printing device. II The first signal and the second signal are used by the printing device to determine that the first terminal and the other terminal are not short-circuited and that the liquid container is attached to the printing device. III The device comprises: outputting the first signal from the first terminal to the printing device; After outputting the first signal, the second signal is output from the first terminal to the printing device. IV When the first terminal and the other terminal are not short-circuited, a clock signal in which low voltage and high voltage are alternately repeated at a predetermined cycle is input from the printing device to the second terminal; outputting the first low voltage as a first expected value from the first terminal to the printing device at a first timing in a period in which the voltage input to the second terminal is the high voltage; After outputting the first low voltage, at a second timing during which the voltage input to the second terminal is the low voltage, outputting the second high voltage as a second expected value from the first terminal to the printing device; After the second high voltage is output, at a third timing during a period in which the voltage input to the second terminal is the high voltage, the second low voltage is output from the first terminal to the printing device as a third expected value.

148. 148. Use of the liquid storage container according to claim 147, Use of a liquid container in which, when the first terminal and the other terminal are not short-circuited, the first low voltage is output to the first terminal before the first timing during the high voltage period in one cycle of the clock signal.

149. Use of the liquid storage container according to claim 147 or 148, Use of a liquid container in which, when the first terminal and the other terminal are not short-circuited, the second high voltage is output to the first terminal during the low voltage period in one cycle of the clock signal, before the second timing.

150. Use of the liquid storage container according to any one of claims 147 to 149, Use of a liquid container in which, when the first terminal and the other terminal are not short-circuited, the second low voltage is output to the first terminal before the third timing during the high voltage period in one cycle of the clock signal.

151. Use of a liquid storage container according to any one of claims 147 to 150, When the first terminal and the other terminal are not short-circuited, in one cycle of the clock signal, When the voltage input to the second terminal changes from the high voltage to the low voltage, the second high voltage is output to the first terminal; When the voltage input to the second terminal changes from the low voltage to the high voltage, the second low voltage is output to the first terminal.

152. Use of a liquid storage container according to any one of claims 147 to 151, Use of a liquid storage container that outputs the first low voltage to the first terminal when the voltage input to the second terminal changes from the low voltage to the high voltage when the first terminal and the other terminal are not short-circuited.

153. Use of a liquid storage container according to any one of claims 147 to 152, When the first terminal and the second terminal are short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage different from the third expected value from the first terminal to the printing device at the third timing.

154. Use of a liquid storage container according to any one of claims 147 to 153, If the first terminal and the second terminal are short-circuited after the first timing and before the second timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage different from the third expected value from the first terminal to the printing device at the third timing.

155. Use of a liquid storage container according to any one of claims 147 to 154, If the first terminal and the second terminal are short-circuited after the second timing and before the third timing, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage different from the third expected value from the first terminal to the printing device at the third timing.

156. Use of a liquid storage container according to any one of claims 147 to 155, If the short circuit between the first terminal and the second terminal is resolved after the first timing and before the second timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

157. Use of a liquid storage container according to any one of claims 147 to 156, If the short circuit between the first terminal and the second terminal is resolved after the second timing and before the third timing, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage different from the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

158. Use of a liquid storage container according to any one of claims 147 to 157, the first terminal is a data terminal, the second terminal is a clock terminal, the first signal is a first response signal sent to the printing device; The second signal is a second response signal that is sent to the printing device.

159. Use of a liquid storage container according to any one of claims 147 to 158, the other terminals include a third terminal and a fourth terminal, a reset signal including a low voltage and a high voltage is input to the third terminal; A power supply voltage is input to the fourth terminal.

160. 160. Use of the liquid container of claim 159, When at least one of the first terminal and the third terminal is short-circuited and the first terminal and the fourth terminal is short-circuited, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage different from the third expected value from the first terminal to the printing device at the third timing.

161. Use of the liquid storage container according to claim 159 or claim 160, After the first timing and before the second timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a voltage equal to the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage different from the third expected value from the first terminal to the printing device at the third timing.

162. Use of a liquid storage container according to any one of claims 159 to 161, During a period from after the second timing until before the third timing, when at least one of the first terminal and the third terminal are short-circuited and the first terminal and the fourth terminal are short-circuited, outputting a signal equal to the first expected value from the first terminal to the printing device at the first timing; outputting a signal equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container is used that outputs a signal different from the third expected value from the first terminal to the printing device at the third timing.

163. Use of a liquid storage container according to any one of claims 159 to 162, After the first timing and before the second timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

164. Use of a liquid storage container according to any one of claims 159 to 163, After the second timing and before the third timing, when the short circuit between the first terminal and the third terminal is eliminated and the short circuit between the first terminal and the fourth terminal is eliminated, outputting a voltage different from the first expected value from the first terminal to the printing device at the first timing; outputting a voltage equal to the second expected value from the first terminal to the printing device at the second timing; A liquid container is used to output a voltage equal to the third expected value from the first terminal to the printing device at the third timing.

165. Use of a liquid storage container according to any one of claims 159 to 164, After the power supply voltage is input to the fourth terminal, the reset signal changes from the low voltage to the high voltage, whereby the high voltage is input to the third terminal; After the high voltage of the reset signal is input to the third terminal, the clock signal is input to the second terminal; Use of a liquid container, wherein the first signal is input to the first terminal after the high voltage of the reset signal is input to the third terminal.

166. Use of a liquid storage container according to any one of claims 159 to 165, The power supply voltage supplied to the fourth terminal is used to drive the device.

167. Use of a liquid storage container according to any one of claims 159 to 166, the third terminal is a reset terminal, The fourth terminal is a power supply terminal.

168. Use of a liquid storage container according to any one of claims 147 to 167, In at least one of the following cases (i) to (iii), the use of a liquid-storage container involves carrying out steps III and IV multiple times. (i) when a voltage different from the first expected value is output from the first terminal to the printing device at the first timing; (ii) when a voltage equal to the second expected value is output from the first terminal to the printing device at the second timing; (iii) A voltage equal to the third expected value is output from the first terminal to the printing device at the third timing.

169. Use of a liquid storage container according to any one of claims 147 to 168, Use of a liquid storage container in which, when the printing device receives a second print instruction while printing based on a first print instruction, the first signal and the second signal are output to the first terminal after printing based on the first print instruction is completed and before printing based on the second print instruction is started.

170. Use of a liquid storage container according to any one of claims 147 to 169, When the printing device receives an instruction to clean the print head, the printing device outputs the first signal and the second signal to the first terminal before performing the cleaning.

171. Use of a liquid storage container according to any one of claims 147 to 170, the storage unit outputs the first signal and the second signal to the first terminal when the storage unit is at an exchange position where the liquid storage container can be exchanged; When the container is moved from the replacement position to a standby position where the liquid container cannot be replaced, the first signal and the second signal are output to the first terminal.

172. Use of a liquid storage container according to any one of claims 147 to 171, Use of a liquid container, wherein the device stores information about the liquid contained in the liquid container.

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