Consumable chip and working method thereof, consumable container and printing device

Abstract

The present invention provides a consumable chip and a working method thereof, a consumable container and a printing device. The consumable chip includes a substrate, an electronic module and a plurality of connection terminals are arranged on the surface of the substrate, the electronic module has a communication controller, an energy storage device and a power supply controller, the power supply terminal is connected to a power supply pin; the energy storage device includes a positive terminal and a negative terminal with a potential difference, and a ground pin is connected to the negative terminal; when the printing device powers on the power supply pin through the power terminal, the power supply controller controls the positive terminal to be connected to the power supply pin, and uses the potential difference of the energy storage device to generate a virtual ground to allow the communication controller to work; the power supply controller controls the positive terminal to disconnect from the power supply pin within a preset time after the printing device powers off the power supply pin; the plurality of connection terminals do not include a ground terminal. The present invention also provides a working method for the above-mentioned consumable chip. The present invention can cancel the power supply terminal on the substrate and can ensure normal communication between the consumable chip and the printing device.

Description

Technical Field

[0001] The present invention relates to the technical field of inkjet printing, and in particular, to a consumable chip and a working method of the consumable chip, a consumable container having the consumable chip, and a printing device equipped with the consumable container. Background Art

[0002] Printing equipment, as a common office equipment, provides great convenience for modern office. Common printing equipment is divided into inkjet printing equipment and laser printing equipment. Inkjet printing equipment uses an ink cartridge containing ink as a consumable container to spray ink onto paper to form the text or pattern to be printed on the paper; laser printing equipment uses a toner cartridge containing toner as a consumable container to form the text or pattern to be printed on the medium.

[0003] See also Figure 1 There is a color inkjet printing device having a housing 11. Figure 1 The inkjet printing device shown in the figure omits the support plate of the housing 11. The housing 11 is provided with a movement 12 of the inkjet printing device and a slide bar. The printing carriage 14 is moved by the motor ( Figure 1 The printing carriage 14 is provided with a main control circuit board ( Figure 1 The main control circuit board communicates with the movement 12 via the flat cable 13.

[0004] A plurality of ink cartridges 15 are detachably mounted on the printing carriage 14, and different ink cartridges 15 contain inks of different colors. The structure of the ink cartridge 15 is as follows: Figure 2 The ink cartridge 15 has a box body 16 , which encloses a cavity for containing ink, and an ink outlet 17 is provided at the lower end of the cavity. The ink in the cavity flows out through the ink outlet 17 and supplies ink to the ink supply needle of the printing carriage 14 .

[0005] A chip 18 is mounted on the outer wall of the cartridge body 16 of the ink cartridge 15. The chip 18 has a substrate. One side of the substrate is provided with a plurality of connection terminals 19 for electrically connecting with the contact pins on the printing carriage 14. The other side of the substrate is provided with a memory ( Figure 2 The memory is usually non-volatile, such as EEPROM or FLASH, which stores information related to the ink cartridge, including variable information and constant information. The variable information is information that changes with the printing operation, such as the remaining ink level, printing time, number of printed sheets, etc. The constant information is information that does not change with the printing operation, such as the ink cartridge model, applicable inkjet printing device model, ink color, etc.

[0006] After the ink cartridge 15 is installed in the print carriage 14 of the inkjet printing device, the inkjet printing device powers on the chip 18 and reads the data stored in the memory of the chip 18 to determine whether the model of the ink cartridge 15 is appropriate, whether the amount of ink remaining in the ink cartridge 15 is sufficient, etc. Only after determining that the model of the ink cartridge 15 is appropriate and there is sufficient ink in the ink cartridge 15, the inkjet printing device can perform the printing work.

[0007] See also Figure 3 A substrate 20 of an existing ink cartridge chip 18 is provided with five connection terminals on one surface, including a power terminal 21, a clock terminal 22, a data terminal 23, a chip selection terminal 24 and a ground terminal 25. Usually, the distance between the ground terminal 25 and other connection terminals is large.

[0008] When the inkjet printing device communicates with the ink cartridge chip, the five connection terminals of the ink cartridge chip are correspondingly connected to the contact pins of the inkjet printing device. For example, the ground terminal needs to be connected to the ground contact pin of the inkjet printing device to provide a reference ground for the ink cartridge chip to form a current loop. However, if there are insulating foreign objects on the ground terminal 25, such as residual glue of double-sided tape, dried ink, etc., these insulating foreign objects will cause the electrical connection between the ground terminal 25 and the ground contact pin of the inkjet printing device to be disconnected, so that the ink cartridge chip cannot recognize the signal output by the inkjet printing device, and cannot respond to the signal sent by the inkjet printing device, causing the inkjet printing device to believe that the ink cartridge is not installed correctly and cannot perform printing operations.

[0009] In addition, from Figure 3 It can be seen that among the five connecting terminals, the distances between the power terminal 21, the clock terminal 22, the data terminal 23 and the chip select terminal 24 are relatively small and are located on the left side of the central axis of the substrate 20. Only the ground terminal 25 is located on the right side of the central axis of the substrate 20, resulting in a larger area of ​​the ink cartridge chip 18. If the ground terminal is not provided on the substrate 20, on the one hand, the area of ​​the substrate can be reduced and the production cost of the ink cartridge chip 18 can be reduced. On the other hand, it can also avoid the problem of foreign matter adhering to the ground terminal 25 and affecting the communication between the inkjet printing device and the ink cartridge chip. Summary of the invention

[0010] The first object of the present invention is to provide a consumable chip that can prevent foreign matter from adhering to a ground terminal and affecting communication with a printing device.

[0011] The second object of the present invention is to provide a working method of the above-mentioned consumable chip.

[0012] A third object of the present invention is to provide a consumable container provided with the above-mentioned consumable chip.

[0013] A fourth object of the present invention is to provide a printing device that can detachably install the above-mentioned consumable container.

[0014] To achieve the first objective of the present invention, the consumable chip provided by the present invention is detachably installed in a printing device, the consumable chip includes a substrate, an electronic module and a plurality of connection terminals are arranged on the surface of the substrate, the connection terminals include a power terminal, the electronic module has a communication controller, an energy storage device and a power supply controller, the communication controller has a plurality of pins, the plurality of pins include a power pin and a ground pin, the power terminal is connected to the power pin; the energy storage device includes a positive terminal and a negative terminal with a potential difference, the ground pin is connected to the negative terminal; when the printing device powers on the power pin through the power terminal, the power supply controller controls the positive terminal to be connected to the power pin, and uses the potential difference of the energy storage device to generate a virtual ground to allow the communication controller to work; the power supply controller controls the positive terminal to disconnect from the power pin within a preset time after the printing device powers off the power pin; the plurality of connection terminals do not include a ground terminal, or the ground terminal in the connection terminal is blocked by an electrically insulating component, or the ground terminal on the substrate is open to the ground pin.

[0015] It can be seen from the above scheme that the ground pin of the communication controller will not be connected to the ground terminal of the substrate, or the ground terminal may not be needed on the substrate, or the ground terminal may be shielded. Even if foreign matter is attached to the ground terminal, the ground terminal will not be electrically connected to the communication controller, so it will not affect the data communication between the electronic module and the printing device, thereby ensuring that the data transmission between the electronic module and the printing device is not interfered by the ground pin. In addition, if the ground terminal is not set, the area of ​​the substrate can be reduced, and the production cost of the consumable chip can be reduced.

[0016] A preferred solution is that the power supply controller includes a first switching device and a discharge control module, the discharge control module includes a second switching device, and the power pin is connected to the positive terminal through the second switching device; the drain of the first switching device is connected to the control electrode of the second switching device and controls the on and off of the second switching device, so that the second switching device is turned on only within a preset time period after the voltage at the power terminal rises to a preset voltage; the source of the first switching device is connected to the negative terminal of the energy storage device through a first resistor, and the first switching device is turned on after the voltage at the power terminal rises to a preset voltage, thereby turning on the second switching device.

[0017] Since the discharge control module and the first switch device are provided in the electronic module, the on-off control of the energy storage device and the power pin is realized by controlling the on-off of the second switch device. Since the second switch device is only turned on within a preset time period after the voltage of the power terminal rises to a preset voltage, that is, the energy storage device only discharges to the communication controller in a very short time, and does not discharge to the communication controller most of the time. Since the communication controller can complete the communication with the printing device in a very short time, that is, when the printing device does not need to communicate with the electronic module, the energy storage device does not discharge to the communication controller, on the one hand, it can ensure that the communication controller can communicate with the printing device, and on the other hand, it can avoid the premature release of the electric energy of the energy storage device, thereby ensuring a long service life of the energy storage device and meeting the demand for long-term use of consumable chips.

[0018] A further solution is that the discharge control module is also provided with a fourth switching device and a voltage delay change circuit, the fourth switching device is connected between the control electrode of the second switching device and the positive terminal of the energy storage device, and the voltage delay change circuit delays the output of a voltage change signal to the control electrode of the fourth switching device.

[0019] It can be seen that after the voltage of the power terminal increases, the voltage delay variation circuit can delay the cut-off of the fourth switch device, so that the second switch device remains in the on state for a period of time when the voltage of the power terminal increases.

[0020] A further solution is that the voltage delay variation circuit includes an RC module and a voltage threshold detection chip, the RC module is connected to the voltage input end of the voltage threshold detection chip, and the voltage output end of the voltage threshold detection chip is connected to the control electrode of the fourth switching device.

[0021] In this way, by setting appropriate parameters of the RC module, the time parameters of the voltage threshold detection chip output signal can be adjusted, thereby flexibly changing the time length for maintaining the second switch device in the on state according to the communication time of the chip.

[0022] A further solution is that the RC module is connected between the power pin and the first resistor.

[0023] It can be seen that the RC module can receive the current output by the power terminal, allowing the voltage of the RC module to rise slowly. Therefore, the voltage at the input end of the voltage threshold detection chip can rise slowly after the voltage of the power terminal rises, thereby ensuring that the second switching device remains in the on state after power-on for a period of time.

[0024] A further solution is that the power supply controller also includes a third switching device, which is connected between the control electrode of the second switching device and the positive terminal of the energy storage device, and before the voltage of the power terminal rises to a preset voltage, the third switching device is turned on, thereby turning off the second switching device.

[0025] It can be seen that before the voltage of the power terminal rises to the preset voltage, it can ensure that the second switch device is in the off state, the energy storage device will not discharge to the communication controller, and the service life of the consumable chip is extended.

[0026] A further solution is that the second switch device is a field effect transistor. Since the on-off of the field effect transistor is realized based on the voltage difference between the gate and the source, the on-off control of the second switch device can be realized by controlling the voltage between the gate and the source.

[0027] To achieve the second purpose of the present invention, the working method of the consumable chip provided by the present invention is applied to the above-mentioned consumable chip, and the method includes: before the voltage of the power terminal rises to a preset voltage, the second switching device is in an off state, and the energy storage device does not discharge to the communication controller; within a preset time period after the voltage of the power terminal rises to the preset voltage, the second switching device is in an on state, and the energy storage device discharges to the communication controller; after the voltage of the power terminal rises to the preset voltage and exceeds the preset time period, the second switching device is in an off state, and the energy storage device does not discharge to the communication controller.

[0028] It can be seen from the above scheme that, through the above control scheme, the energy storage device will only discharge to the communication controller in a very short time after power-on, and will not discharge to the communication controller most of the time. Usually, the communication controller can complete the communication with the printing device in a very short time, for example, it communicates with the printing device within a period of time after the voltage of the power terminal increases. Therefore, when the printing device needs to communicate with the electronic module, the energy storage device discharges to the controller, and when the printing device does not need to communicate with the electronic module, the energy storage device does not discharge to the communication controller. On the one hand, it can ensure that the communication controller can communicate with the printing device, and on the other hand, it can avoid the premature release of the electric energy of the energy storage device, thereby ensuring that the service life of the energy storage device is long and meeting the needs of long-term use of consumable chips.

[0029] To achieve the third purpose of the present invention, the consumable container provided by the present invention can be disassembled and installed on a printing device. The consumable container includes a box body, a cavity is formed in the box body, the printing consumables are accommodated in the cavity, and a consumable outlet is arranged on one side of the cavity; the above-mentioned consumable chip is arranged on the outer wall of the box body.

[0030] To achieve the fourth objective of the present invention, the printing device provided by the present invention comprises a body, a main control circuit board is arranged in the body, and one or more of the above-mentioned consumable material containers are installed in the printing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of an existing inkjet printing device.

[0032] Figure 2 It is a structural schematic diagram of an existing ink cartridge.

[0033] Figure 3 It is a structural diagram of an existing ink cartridge chip.

[0034] Figure 4 It is an electrical principle block diagram of a consumable chip embodiment and a printing device of the present invention.

[0035] Figure 5 It is an electrical schematic diagram of the electronic module of the consumable chip embodiment of the present invention.

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0037] The printing device of the present invention can be an inkjet printing device or a laser printing device. The following description will be made by taking an inkjet printing device as an example. The inkjet printing device has a body, in which one or more ink cartridges are arranged. The ink cartridge is a consumable container of the present invention, and an ink cartridge chip is arranged on the side wall of each ink cartridge. The present invention improves the circuit of the ink cartridge chip, thereby canceling the ground terminal on the ink cartridge chip or shielding the ground terminal, that is, shielding the function of the ground terminal. Even if an electrically insulating foreign object drips at the position of the ground terminal, it will not affect the communication between the ink cartridge and the inkjet printing device.

[0038] Consumable chip embodiment:

[0039] The inkjet printing device of this embodiment is provided with a body, a printing carriage is formed in the body, and the ink cartridge is detachably installed in the printing carriage. Each ink cartridge has a box body, and the box body surrounds a cavity for accommodating ink. An ink outlet connected to the cavity is provided below the cavity. The ink in the cavity can flow into the nozzle of the inkjet printing device through the ink outlet. An ink cartridge chip is detachably installed on the front wall of the ink cartridge.

[0040] The printing carriage of the inkjet printing device is provided with a stylus holder, the main control circuit board and the ink cartridge are respectively arranged on both sides of the stylus holder, and the stylus holder is provided with a plurality of styluses. Figure 4 The contact pins of the inkjet printing device 30 include a power contact pin 31 , a data contact pin 32 , a clock contact pin 33 , a chip select contact pin 34 and a ground contact pin 35 .

[0041] The ink cartridge chip 40 has a substrate, and a plurality of connection terminals are arranged on the surface of the substrate, and the plurality of connection terminals include a power terminal 41, a data terminal 42, a clock terminal 43, and a chip select terminal 44. Each connection terminal corresponds to a contact pin. When the ink cartridge is installed in the inkjet printing device, each connection terminal on the ink cartridge chip 40 is connected to the corresponding contact pin, for example, the power terminal 41 is electrically connected to the power contact pin 31, and so on. In addition, the ink cartridge chip 40 does not have a ground terminal, but forms a virtual ground 45. The virtual ground 45 is formed by the negative terminal of the energy storage device described below after the positive terminal is connected to the power terminal 41, and is not a metal sheet formed on the surface of the substrate, so it will not be electrically connected to the ground contact pin 35. Of course, in other embodiments, a ground terminal can also be arranged on the substrate, but the ground terminal needs to be shielded by an electrically insulating component, for example, a layer of electrically insulating film is coated on the surface of the ground terminal, so that the ground contact pin 35 will not be electrically connected to the ground terminal, that is, both are in an open circuit state.

[0042] Since the power terminal 41 is electrically connected to the power contact pin 31, when the inkjet printing device needs to communicate with the ink cartridge chip 40, the power contact pin 31 outputs a high-level signal of about 3.3V. Therefore, when the inkjet printing device powers on the ink cartridge chip 40 through the power terminal 41, the power terminal 41 receives a high-level signal. The data terminal 42, the clock terminal 43, and the chip select terminal 44 are communication terminals, which are respectively connected to the data contact pin 32, the clock contact pin 33, and the chip select contact pin 34. Since the data contact pin 32, the clock contact pin 33, and the chip select contact pin 34 of the inkjet printing device are equivalently connected to the ground contact pin 35 with a large resistance when no signal is transmitted, the data terminal 42, the clock terminal 43, and the chip select terminal 44 usually show a low-level signal when idle, that is, a weak pull-down state.

[0043] An electronic module 48 is also provided on the substrate of the ink cartridge chip 40. The electronic module 48 can be located on a side of the substrate opposite to the multiple connection terminals, or on the same side as the multiple connection terminals. This embodiment does not limit the arrangement of the multiple connection terminals and the electronic module 48 on the substrate. Figure 5, a communication controller U1 is provided in the electronic module 48, and of course, a memory and peripheral circuits can also be provided. The communication controller U1 has multiple functional pins, including a power pin VCC, a data pin DAT, a chip select pin CS, a clock pin CLK and a ground pin GND. The power pin VCC, the data pin DAT, the chip select pin CS, and the clock pin CLK are respectively connected to the corresponding connection terminals on the substrate, that is, the power pin VCC is connected to the power terminal 41, the data pin DAT is connected to the data terminal 42, the clock pin CLK is connected to the clock terminal 43, and the chip select pin CS is connected to the chip select terminal 44. In addition, the ground pin GND of the communication controller U1 is connected to the virtual ground 45. In other embodiments, if a ground terminal is provided on the substrate, the ground pin GND of the communication controller U1 and the ground terminal can be in an open circuit state.

[0044] The communication controller U1 receives the clock signal sent by the inkjet printing device through the clock pin CLK, and receives the data signal sent by the inkjet printing device through the data pin DAT, and responds according to the received signal, returns a response signal to the inkjet printing device, and the inkjet printing device determines whether the response signal returned by the ink cartridge chip 40 is correct. Since the ground pin of the communication controller U1 will not receive the ground signal of the inkjet printing device, but the power pin VCC of the communication controller U1 is electrically connected to the power contact pin 31 of the inkjet printing device through the power terminal 41, the communication controller U1 can receive the power signal of the inkjet printing device. Since the function of the ground signal is to provide a reference level for the communication controller U1, in order to allow the communication controller U1 to receive the reference level, in this embodiment, an energy storage device and a power supply controller are provided in the electronic module 48. The energy storage device in this embodiment is a battery BAT1. In other embodiments, the energy storage device can also be a super capacitor or an ordinary capacitor. The power supply controller of this embodiment includes a first switch device Q1, a third switch device Q3, a resistor R1 and a discharge control module. The discharge control module includes a second resistor R2, a first capacitor C1, a voltage threshold detection chip U2, a fourth switch device Q4 and a second switch device Q2.

[0045] The positive terminal of the battery BAT1 is connected to the power pin VCC of the communication controller U1 through the second switch device Q2, and the negative terminal of the battery BAT1 is directly connected to the ground pin GND of the communication controller U1. Since the voltage of the DC power supply output by the inkjet printing device is 3.3V, and the voltage of the battery BAT1 is also 3.3V, that is, the potential difference between the positive terminal and the negative terminal of the battery BAT1 is 3.3V. In this way, when the second switch device Q2 is in the on state, the battery BAT1 will force the power pin VCC and the ground pin GND of the communication controller U1 to form a potential difference of 3.3V. Even if the communication controller U1 does not receive the ground signal output by the inkjet printing device, because the potential difference of 3.3V is formed between the power pin VCC and the ground pin GND, the communication controller U1 can identify the difference between the voltage of the power pin VCC and the voltage of the ground pin GND, meeting the communication requirements. That is, for the inkjet printing device and the communication controller U1, since the power contact pin of the inkjet printing device is connected to the power pin VCC of the communication controller U1, the electric potential is the same, and the virtual ground 45 of the communication controller U1, under the driving action of the battery BAT1, its electric potential will drop by 3.3V compared to the power pin VCC. When the voltage of the DC power supply provided by the inkjet printing device is 3.3V and the ground voltage is 0V, the voltage of the virtual ground 45 of the communication controller U1 is also 0V. Therefore, for the inkjet printing device, the voltage of the communication controller U1 when sending a high-level signal is 3.3V, and the voltage when sending a low-level signal is 0V. Therefore, the inkjet printing device can correctly receive the signal output by the communication controller U1. The communication controller U1 has the same principle when receiving the signal output by the inkjet printing device, which will not be repeated here.

[0046] If the second switch device Q2 is in the on state for a long time, the electric energy of the battery BAT1 will be consumed quickly, resulting in a short service life of the battery BAT1, which cannot meet the demand for long-term use of the ink cartridge chip. For this reason, the present embodiment also provides a discharge control module, which controls the on and off of the second switch device Q2 so that the second switch device Q2 is turned on only within a preset time period after the voltage at the power terminal rises to a preset voltage, and is in the off state at other times.

[0047] When the inkjet printing device needs to communicate with the ink cartridge chip, the power contact pin 31 of the inkjet printing device will output a high-level signal, so that the voltage of the power terminal 41 rises, and each communication between the inkjet printing device and the ink cartridge chip 40 usually lasts only for a short time, for example, about 1 second. To this end, this embodiment requires that after the voltage of the power terminal 41 rises to a certain voltage, for example, after it rises to about 3.3V, the battery BAT1 starts to supply power to the communication controller U1, and the power supply time lasts longer than the communication time between the inkjet printing device and the ink cartridge chip, for example, the power supply maintenance time is about 1.5 seconds.

[0048] refer to Figure 5 The second switch device Q2 and the fourth switch device Q4 are both field effect tubes. The voltage delay variation circuit of this embodiment includes an RC module and a voltage threshold detection chip U2. The RC module includes a resistor R2 and a capacitor C1. The resistor R2, the capacitor C1, and the resistor R1 are connected in series in sequence. Therefore, the RC module is connected between the power pin and the resistor R1, and the RC module constitutes an RC oscillation circuit.

[0049] The second switching device Q2 is a P-type field effect transistor, whose gate is connected to the drain of the first switching device Q1 and the drain of the third switching device Q3, and receives control signals output by the first switching device Q1 and the third switching device Q3. The source of the second switching device Q2 is connected to the positive terminal of the battery BAT1, and the drain of the second switching device Q2 is connected to the power pin VCC of the communication controller U1.

[0050] The first switch device Q1 is an N-type field effect transistor, whose gate is connected to the power supply terminal 41, and whose source is connected to the negative terminal of the battery BAT1 through the resistor R1. The third switch device Q3 is a P-type field effect transistor, whose gate is connected to the power supply terminal 41, and whose source is connected to the positive terminal of the battery BAT1. Therefore, the conduction state of the first switch device Q1 is opposite to the conduction state of the third switch device Q3. The fourth switch device Q4 is a P-type field effect transistor, whose gate is connected to the voltage output terminal of the voltage threshold detection chip U2, whose source is connected to the gate of the second switch device Q2, and whose drain is connected to the positive terminal of the battery BAT1. The voltage input terminal of the voltage threshold detection chip U2 receives the signal of the RC module. The two ends of the capacitor C1 of the RC oscillation circuit are respectively connected to the voltage input terminal and the reference voltage terminal of the voltage threshold detection chip U2.

[0051] Consumable chip working method embodiment:

[0052] The working method of the ink cartridge chip is described below. Before the ink cartridge is installed in the inkjet printing device, or the inkjet printing device is in the shutdown state, at this time, since the negative terminal of the battery BAT1 is directly connected to the ground pin GND of the communication controller U1, and the power pin VCC and the ground pin GND of the communication controller U1 are indirectly connected through various devices inside the communication controller U1 when the communication controller U1 is not powered on, the equivalent resistance is generally tens of K to hundreds of K ohms. Therefore, before the ink cartridge is installed in the inkjet printing device, or the inkjet printing device is in the shutdown state, the power pin VCC of the communication controller U1 will have a certain negative voltage difference relative to the positive electrode of the battery BAT1. Therefore, at this time, the voltage of the gate of the third switch device Q3 (that is, the power pin VCC) is lower than the voltage of the source of the third switch device Q3 (that is, the positive terminal of the battery BAT1), and the third switch device Q3 is in the on state. Therefore, the gate voltage of the second switching device Q2 is equal to the voltage of the positive terminal of the battery BAT1, that is, the gate voltage of the second switching device Q2 is equal to the source voltage. At this time, the second switching device Q2 is in the off state, and the battery BAT1 will not discharge to the communication controller U1. Therefore, the electric energy of the battery BAT1 will not be consumed.

[0053] When the inkjet printing device needs to start communicating with the ink cartridge chip, the voltage of the power pin 31 starts to increase, so the voltage of the power terminal 41 also starts to increase. Since the clock pin 33 on one side of the inkjet printing device is in a weak pull-down state, it can be understood that at this time, the clock pin 33 of the inkjet printing device is pulled down to the ground of the inkjet printing device through a resistor of several hundred K ohms. Since the clock pin 33 of the inkjet printing device is directly connected to the clock pin CLK of the communication controller U1, and there is also an equivalent impedance of tens of K ohms to hundreds of K ohms between the clock pin CLK of the communication controller U1 and the ground pin GND of the communication controller U1, the ground of the inkjet printing device and the negative terminal of the battery BAT1 will be superimposed with an equivalent resistance of several hundred K ohms to more than 1M ohms. Therefore, after the power supply voltage output by the inkjet printing device increases, the voltage of the gate (that is, the power pin) of the first switch device Q1 is higher than the voltage of the source (that is, the negative terminal of the battery BAT1) of the first switch device Q1. Since the resistance value of the resistor R1 is much smaller than that of the inkjet printing device, The equivalent resistance between the ground and the negative terminal of the battery BAT1, so the first switch device Q1 is in the on state, the third switch device Q3 is turned off, and the gate voltage of the second switch device Q2 is equal to the voltage of the negative terminal of the battery BAT1 after the first switch device Q1 is turned on. At this time, the second switch device Q2 is in the on state, and the power pin VCC of the communication controller U1 is connected to the positive terminal of the battery BAT1, so that the voltage of the ground pin GND of the communication controller U1 is the voltage of the power pin VCC minus the voltage of the battery BAT1, and because the voltage of the battery BAT1 is equal to the voltage of the power pin VCC of the communication controller U1, therefore, at this time, the voltage of the ground pin GND of the communication controller U1 is equal to the voltage of the ground of the inkjet printing device, that is, the voltage of the power pin VCC and the ground pin GND of the communication controller U1 is the voltage difference of the battery BAT1, and the communication controller U1 can be normally powered on under the control of the DC voltage provided by the inkjet printing device and respond to the instructions issued by the inkjet printing device under the power supply of the battery BAT1.

[0054] After the voltage of the DC power supply output by the power contact pin 31 of the inkjet printing device begins to increase, due to the presence of the RC module, the voltage at the voltage input terminal Vin of the voltage threshold detection chip U2 rises slowly. After the voltage of the power contact pin 31 of the inkjet printing device increases, for example, before it increases to a preset voltage, preferably, the preset voltage is 3.0V, the voltage at the voltage input terminal Vin of the voltage threshold detection chip U2 does not immediately increase to 3.0V, but increases to 3.0V after a period of time. Before the voltage at the voltage input terminal Vin of the voltage threshold detection chip U2 reaches the preset voltage detection value, the voltage at the voltage output terminal Vout of the voltage threshold detection chip U2 is equal to the voltage at the reference voltage terminal, so that the fourth switch device Q4 remains in the off state. When the fourth switch device Q4 is in the off state, since the first switch device Q1 is turned on, the second switch device Q2 remains in the on state, and the battery BAT1 supplies power to the communication controller U1.

[0055] When the voltage at the voltage input terminal Vin of the voltage threshold detection chip U2 reaches the preset voltage detection value, the voltage at the voltage output terminal Vout of the voltage threshold detection chip U2 is equal to the voltage at the input terminal Vin, and the fourth switch device Q4 is turned on, so that the gate of the second switch device Q2 is equal to the positive terminal of the battery BAT1, the second switch device Q2 is turned off, and the battery BAT1 stops supplying power to the communication controller U1. It can be seen that after the voltage at the voltage input terminal Vin of the voltage threshold detection chip U2 reaches the preset voltage detection value, the battery BAT1 no longer supplies power to the communication controller U1. Therefore, by setting the parameters of the resistor R2, the capacitor C1 and the first resistor R1 in the RC module, the length of time that the battery BAT1 supplies power to the communication controller U1 can be changed. Preferably, the parameters of the RC module are determined according to the duration of the communication between the inkjet printing device and the ink cartridge chip, so that the duration of the battery BAT1 supplying power to the communication controller U1 is slightly longer than the duration of the communication between the inkjet printing device and the ink cartridge chip. For example, if the communication duration between the inkjet printing device and the ink cartridge chip is 1 second, the duration of the battery BAT1 supplying power to the communication controller U1 is 1.5 seconds, so as to ensure that the communication between the inkjet printing device and the ink cartridge chip can be carried out completely. It can be seen that the voltage delay variation circuit delays the output of the voltage variation signal to the fourth switch device Q4, thereby ensuring that the battery BAT1 supplies power to the communication controller U1 only for a very short time.

[0056] After the inkjet printing device and the ink cartridge chip have finished communicating, the voltage of the power pin 31 of the inkjet printing device begins to drop and returns to the shutdown state. At this time, since the voltage signal on the power terminal 41 disappears, the second switch device Q2 is also turned off, and the voltage of the power pin VCC of the communication controller U1 continues to drop, so that the third switch device Q3 is in the on state, and the first switch device Q1 is turned off. At this time, the gate voltage of the second switch device Q2 is equal to the voltage of the positive terminal of the battery BAT1. With the continuous discharge of the RC module, after the voltage of the voltage input terminal Vin of the voltage threshold detection chip U2 drops to the detection threshold, the fourth switch device Q4 is also turned off, and the gate of the second switch device Q2 is maintained equal to the voltage of the positive terminal of the battery BAT1 through the third switch device Q3, and the electronic module returns to the state where the inkjet printing device is not powered on.

[0057] In combination with the above workflow, it can be seen that when the inkjet printing device powers on the power pin VCC of the communication controller U1 through the power terminal 41, the power supply controller controls the positive terminal of the battery BAT1 to be connected to the power pin VCC of the communication controller U1, and uses the potential difference across the battery BAT1 to generate a virtual ground to allow the communication controller U1 to work. In addition, within a preset time after the inkjet printing device powers off the power pin VCC of the communication controller U1, the power supply controller controls the positive terminal of the battery BAT1 to disconnect from the power pin VCC of the communication controller U1, thereby preventing the battery BAT1 from discharging for a long time.

[0058] It can be seen that there is no need to set a ground terminal on the ink cartridge chip, or the ground terminal may be blocked, or the ground terminal and the ground pin of the communication controller U1 may be open-circuited. In this way, even if foreign matter such as ink adheres to the substrate or even the ground terminal, it will not affect the communication between the communication controller U1 and the inkjet printing device, thereby ensuring the communication stability between the ink cartridge chip and the inkjet printing device.

[0059] In addition, since the battery BAT1 is not discharged to the communication controller U1 for a long time, but only discharged in a very short time, it can ensure that the battery BAT1 has a long service life.

[0060] Of course, in some other embodiments, all the devices in this embodiment may be integrated into the same integrated circuit, or some devices may be integrated into two or more integrated circuits to achieve the same technical effect. These changes are also included in the protection scope of the present invention.

[0061] Consumables container and printing device embodiment:

[0062] The printing device of this embodiment is an inkjet printing device, in which a body is provided, a main control circuit board is provided in the body, and one or more consumable containers are detachably installed in the inkjet printing device. The consumable container of this embodiment is an ink cartridge, which has a shell, an ink outlet is provided on the shell, and the consumable chip mentioned above is also provided.

[0063] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A consumable chip, detachably installed in a printing device, the consumable chip comprises a substrate, the substrate is provided with an electronic module and a plurality of connection terminals, the connection terminals include a power terminal, the electronic module comprises a communication controller, an energy storage device and a power supply controller, the communication controller has a plurality of pins, the plurality of pins include a power pin and a ground pin, the power terminal is connected to the power pin, the energy storage device comprises a positive terminal and a negative terminal having a potential difference, the ground pin is connected to the negative terminal; Features: When the printing device powers on the power pin through the power terminal, the power supply controller controls the positive terminal to be connected to the power pin, and uses the potential difference of the energy storage device to generate a virtual ground to allow the communication controller to work; The power supply controller controls the positive terminal to disconnect from the power supply pin within a preset time after the printing device powers off the power supply pin; The plurality of connection terminals do not include a ground terminal, or a ground terminal among the connection terminals is blocked by an electrical insulating component, or a ground terminal on the substrate is open-circuited from the ground pin.

2. The consumable chip according to claim 1, characterized in that: The power supply controller includes a first switch device and a discharge control module, the discharge control module includes a second switch device, and the power supply pin is connected to the positive terminal through the second switch device; The drain of the first switching device is connected to the control electrode of the second switching device and controls the on and off of the second switching device, so that the second switching device is turned on only within a preset time period after the voltage of the power terminal rises to a preset voltage; The source of the first switching device is connected to the negative terminal of the energy storage device through a first resistor, and the first switching device is turned on after the voltage of the power terminal increases to a preset voltage, thereby turning on the second switching device.

3. The consumable chip according to claim 2, characterized in that: The discharge control module is also provided with a fourth switch device and a voltage delay variation circuit. The fourth switch device is connected between the control electrode of the second switch device and the positive terminal of the energy storage device. The voltage delay variation circuit delays the output of a voltage variation signal to the control electrode of the fourth switch device.

4. The consumable chip according to claim 3, characterized in that: The voltage delay variation circuit includes an RC module and a voltage threshold detection chip, the RC module is connected to the voltage input end of the voltage threshold detection chip, and the voltage output end of the voltage threshold detection chip is connected to the control electrode of the fourth switching device.

5. The consumable chip according to claim 4, characterized in that: The RC module is connected between the power pin and the first resistor.

6. The consumable chip according to any one of claims 2 to 5, characterized in that: The power supply controller also includes a third switching device, which is connected between the control electrode of the second switching device and the positive terminal of the energy storage device. Before the voltage of the power terminal rises to a preset voltage, the third switching device is turned on, thereby turning off the second switching device.

7. The consumable chip according to any one of claims 2 to 5, characterized in that: The second switch device is a field effect transistor.

8. A working method of a consumable chip, applied to the consumable chip according to any one of claims 2 to 7, characterized in that: The method includes: Before the voltage of the power terminal increases to a preset voltage, the second switch device is in a cut-off state, and the energy storage device does not discharge to the communication controller; Within a preset time period after the voltage of the power terminal rises to a preset voltage, the second switch device is in an on state, and the energy storage device discharges to the communication controller; After the voltage of the power terminal rises to a preset voltage and exceeds the preset time period, the second switch device is in a cut-off state, and the energy storage device does not discharge to the communication controller.

9. A consumables container, detachably mounted on a printing device, the consumables container comprising: A box body, wherein a cavity is formed in the box body, the cavity contains printing consumables, and a consumables outlet is provided on one side of the cavity; Features: The consumable chip according to any one of claims 1 to 7 is arranged on the outer wall of the box body.

10. A printing device, comprising a body, wherein a main control circuit board is arranged in the body, characterized in that: One or more consumable material containers as claimed in claim 9 are installed in the printing device.

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