Information processing device, information processing method, and program

Abstract

To provide an information processing device which is made operably by establishing an energy saving state as a whole information processing device, an operation unit being attachable to and detachable from the information processing device, an information processing method and a program.SOLUTION: The present invention relates t an information processing device comprising an operation unit and a main body to / from which the operation unit is attachable / detachable and which switches a connection state with the operation unit between wired connection and wireless connection. The operation unit includes an operation unit energy saving control section which notifies the main body of a shift request of a power state in a case where the connection state between the operation unit and the main body is the wireless connection and residual capacity of a battery of the operation unit is reduced equal to or less than a predetermined amount. The main body includes a main body control section which shifts a power state of the main body to a predetermined power state in which normally operation can be performed even of the connection state with the operation unit is cut off in a case where the shift request is received from the operation unit.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an information processing device, an information processing method, and a program. [Background technology]

[0002] 2. Description of the Related Art Detachable operation units have been developed for information processing devices such as image forming devices. Summary of the Invention [Problem to be solved by the invention]

[0003] However, in an information processing device with a detachable operation unit, if the battery runs out and the operation unit stops working while the operation unit is detached, the energy-saving state of the information processing device as a whole is no longer established.

[0004] The present invention has been made in consideration of the above, and aims to provide an information processing device, an information processing method, and a program that enable the entire information processing device to operate in an energy-saving state in an information processing device with a detachable operating unit. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems and achieve the object, the present invention provides a device including an operation unit, and a main body to which the operation unit is detachable and which switches a connection state with the operation unit between a wired connection and a wireless connection. and controlling the power states of the operation unit and the main body in a coordinated manner. and when the connection state between the operation unit and the main body is wireless and the remaining battery charge of the battery of the operation unit drops below a predetermined level. Then, the power state of the operation unit is shifted to a sleep state in which power is supplied to maintain information stored in the RAM in the operation unit and power supply to other components is stopped. and an operation unit energy saving control unit that notifies the main body of a power state transition request when the main body receives the transition request from the operation unit, and the main body changes the power state of the main body to: The system transitions to an STR state in which power is supplied to maintain the information stored in the RAM in the main body and power supply to other components is stopped, or to an engine OFF state in which power supply to the cooling fan and engine in the main body is stopped. and a main body control unit for controlling the [Effects of the Invention]

[0006] According to the present invention, an information processing apparatus having a detachable operation unit can be advantageously operated in an energy-saving state as a whole. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a hardware configuration diagram of an MFP to which an information processing device according to this embodiment is applied. [Figure 2] FIG. 2 is a diagram illustrating an example of the basic configuration of the MFP according to the present embodiment. [Figure 3] FIG. 3 is a diagram for explaining an example of the transition of the power states of the main body and the operation panel of the MFP according to the present embodiment. [Figure 4] FIG. 4 is a block diagram showing an example of the functional configuration of the MFP according to the present embodiment. [Figure 5] FIG. 5 is a sequence diagram showing an example of the flow of a power state transition process of the main body and the operation panel of the MFP according to this embodiment. [Figure 6] FIG. 6 is a sequence diagram showing another example of the flow of the power state transition process of the main body and the operation panel of the MFP according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of an information processing device, an information processing method, and a program will be described in detail with reference to the accompanying drawings.

[0009] 1 is a hardware configuration diagram of an MFP to which an information processing device according to this embodiment is applied. As shown in FIG. 1, an MFP (Multifunction Peripheral / Product / Printer) 9 includes a controller 910, a short-range communication circuit 920, an engine control unit 930, an operation panel 940, and a network I / F 950.

[0010] Of these, the controller 910 has a CPU 901, which is the main part of the computer, a system memory (MEM-P) 902, a north bridge (NB) 903, a south bridge (SB) 904, an ASIC (Application Specific Integrated Circuit) 906, a local memory (MEM-C) 907, which is a storage unit, an HDD controller 908, and an HD 909, which is also a storage unit, and is configured such that the NB 903 and the ASIC 906 are connected by an AGP (Accelerated Graphics Port) bus 921.

[0011] Of these, the CPU 901 is a control unit that performs overall control of the MFP 9. The NB 903 is a bridge that connects the CPU 901 with the MEM-P 902, the SB 904, and the AGP bus 921, and includes a memory controller that controls reading and writing to the MEM-P 902, a PCI (Peripheral Component Interconnect) master, and an AGP target.

[0012] The MEM-P 902 has a ROM 902a, which is memory for storing programs and data that realize the functions of the controller 910, and a RAM 902b, which is used for expanding the programs and data and as a drawing memory during memory printing. The programs stored in the RAM 902b may be provided by being recorded in an installable or executable file format on a computer-readable recording medium such as a CD-ROM, CD-R, or DVD.

[0013] The SB 904 is a bridge connecting the NB 903 with PCI devices and peripheral devices. The ASIC 906 is an integrated circuit (IC) for image processing applications that has hardware elements for image processing and functions as a bridge connecting the AGP bus 921, PCI bus 922, HDD 908, and MEM-C 907. The ASIC 906 includes a PCI target and AGP master, an arbiter (ARB) that forms the core of the ASIC 906, a memory controller that controls the MEM-C 907, multiple direct memory access controllers (DMACs) that perform image data rotation using hardware logic, and a PCI unit that transfers data between the scanner unit 931 and printer unit 932 via the PCI bus 922. A USB (Universal Serial Bus) interface or an IEEE 1394 (Institute of Electrical and Electronics Engineers 1394) interface may be connected to the ASIC 906.

[0014] The MEM-C907 is a local memory used as an image buffer for copying and a code buffer. The HD909 is a storage device for storing image data, font data used during printing, and forms. The HD909 controls the reading and writing of data from and to the HD909 under the control of the CPU901. The AGP bus 921 is a bus interface for a graphics accelerator card proposed to speed up graphics processing, and direct high-throughput access to the MEM-P902 enables the graphics accelerator card to operate at high speed.

[0015] Further, the short-distance communication circuit 920 includes a short-distance communication circuit 920a. The short-distance communication circuit 920 is a communication circuit such as NFC (Near Field Communication) or Bluetooth (registered trademark).

[0016] Furthermore, the engine control unit 930 is composed of a scanner unit 931 and a printer unit 932. The scanner unit 931 scans documents, and the printer unit 932 prints on paper. One or both of the scanner unit 931 and the printer unit 932 may be referred to as an engine. The operation panel 940 includes a panel display unit 940a, such as a touch panel, that displays current settings and selection screens and accepts inputs from an operator, and an operation panel 940b that includes a numeric keypad that accepts settings for image formation conditions such as density settings and a start key that accepts a copy start command. The controller 910 controls the entire MFP 9, for example, drawing, communication, and inputs from the operation panel 940. The scanner unit 931 or the printer unit 932 includes image processing units such as error diffusion and gamma conversion.

[0017] The MFP 9 can sequentially switch and select among the document box function, copy function, printer function, and facsimile function using the application switching key on the operation panel 940. When the document box function is selected, the mode becomes document box mode, when the copy function is selected, the mode becomes copy mode, when the printer function is selected, the mode becomes printer mode, and when the facsimile mode is selected, the mode becomes facsimile mode.

[0018] The network I / F 950 is an interface for performing data communication using the communication network 100. The short-range communication circuit 920 and the network I / F 950 are electrically connected to the ASIC 906 via a PCI bus 922.

[0019] 2 is a diagram for explaining an example of the basic configuration of an MFP according to this embodiment. Next, an example of the basic configuration of an MFP 9 according to this embodiment will be described with reference to FIG.

[0020] As shown in FIG. 2, the MFP 9 according to this embodiment has an operation panel 940 and a main body 202.

[0021] The main body 202 has an operation unit dock 201 that is connected to the main body 202 by a wired connection. In this embodiment, the main body 202 is connected to the operation unit dock 201 in accordance with a standard such as USB (Universal Serial Bus). The operation unit dock 201 is a docking station to which an expansion device such as an operation panel 940 can be connected by a wired connection or a wireless connection.

[0022] Furthermore, main body 202 controls operation unit dock 201 to switch the connection state between operation panel 940 and operation unit dock 201 between a wired connection and a wireless connection. That is, MFP 9 has operation panel 940, and main body 202 to which operation panel 940 is detachable and which switches the connection state with operation panel 940 between a wired connection state and a wireless connection state.

[0023] Specifically, when the main body 202 detects that the operation panel 940 has been removed from the operation unit dock 201 and that the wired connection with the operation unit dock 201 has been disconnected, the main body 202 switches the connection state between the operation panel 940 and the operation unit dock 201 to a wireless connection. On the other hand, when the main body 202 detects that the operation panel 940 has been attached to the operation unit dock 201 and that the wired connection with the operation unit dock 201 has been established, the main body 202 switches the connection state between the operation panel 940 and the operation unit dock 201 to a wired connection. The main body 202 can also connect to an external network via a wired network.

[0024] The operation panel 940 is an example of an operation unit that can be connected to the operation unit dock 201 via a wired or wireless connection. The operation panel 940 also includes a secondary battery 940c. When the operation panel 940 is connected to the operation unit dock 201 via a wired connection, the secondary battery 940c is charged.

[0025] Furthermore, when the operation panel 940 detects that the operation panel 940 has been removed from the operation unit dock 201 and that the wired connection with the operation unit dock 201 has been disconnected, the operation panel 940 switches the connection state with the operation unit dock 201 to a wireless connection. As a result, the operation panel 940 continues to be connected to the main body 202, and a seamless and high-quality network between the main body 202 and the operation panel 940 is realized.

[0026] 3 is a diagram for explaining an example of the transition of the power states of the main body 202 and the operation panel 940 of the MFP 9 according to this embodiment. Next, an example of the transition of the power states of the main body 202 and the operation panel 940 of the MFP 9 according to this embodiment will be described with reference to FIG.

[0027] The main body 202 and the operation panel 940 can each have different power states. The power states of the main body 202 include a standby state, a low-power state, a silent state, an engine-off state, and an STR state. The standby state is a power state in which power is supplied to all power destinations in the main body control unit 412 (main body 202) and operations such as printing an image can be performed immediately. The low-power state is a power state in which the main body control unit 412 can immediately transition to the standby state. In the low-power state, power to some components in the main body control unit 412 is reduced. The silent state is a power state in which power supply to the cooling fan is further stopped in the low-power state. The engine-off state is a power state in which power supply to the engine control unit 930 is further stopped in the silent state. The STR state is a power state in which power is supplied to maintain information stored in the RAM in the main body 202 and power supply to other components is generally stopped. The power consumption of the main body control unit 312 increases in the following order: STR state, engine-off state, silent state, low-power state, and standby state.

[0028] The power states of the operation panel 940 include a liquid crystal on state (LCD ON), a liquid crystal off state (LCD OFF), and a sleep state (Sleep). The LCD ON state is a power state in which the liquid crystal display device is turned on. The LCD OFF state is a state in which the supply of power to the liquid crystal display device is stopped in the LCD ON state. The sleep state is a power state in which power is supplied to maintain information stored in the RAM in the operation panel 940, and the supply of power to other components is stopped in principle. The power consumption of the operation unit energy saving control unit 402 increases in the order of the sleep state, the LCD OFF state, and the LCD ON state.

[0029] The MFP 9 as a whole coordinates and controls the power states of the main body 202 and the operation panel 940. Basically, it is assumed that the operation panel 940 and the main body 202 are connected so that they can communicate with each other. Therefore, if communication between the operation panel 940 and the main body 202 is established or if a mismatch occurs between the power states of the operation panel 940 and the main body 202, the operation panel 940 and the main body 202 will not operate normally.

[0030] However, depending on the relationship between the power states of operation panel 940 and main body 202, there are combinations of power states in which operation panel 940 and main body 202 operate normally even if communication between main body 202 and operation panel 940 is cut off. For example, as shown in Fig. 3, if the power state of main body 202 is the engine off state or the STR state and the power state of operation panel 940 is the sleep state, main body 202 and operation panel 940 can operate normally even if communication between main body 202 and operation panel 940 is cut off.

[0031] In this embodiment, the main body 202 inquires of the application (main body application) of the main body 202 and the operation panel 940 as to whether or not a power state transition is possible, and if, as a result of the inquiry, the main body application and the operation panel 940 do not respond to the request to reject the power state transition, the power state of the main body 202 and the operation panel 940 is transitioned.

[0032] 4 is a block diagram showing an example of the functional configuration of the MFP according to this embodiment. Next, an example of the functional configuration of the MFP 9 according to this embodiment will be described with reference to FIG.

[0033] As shown in FIG. 4, the operation panel 940 of the MFP 9 according to this embodiment includes an operation unit application 401, an operation unit energy saving control unit 402, and an operation unit power supply control unit 403.

[0034] The operation unit application 401 is an application that realizes various operations of the operation panel 940 .

[0035] When the connection state between the operation panel 940 and the main body 202 is wireless, the operation unit power supply control unit 403 detects the remaining battery power of the secondary battery 940c mounted on the operation panel 940. Then, when the detected remaining battery power falls below a predetermined amount, the operation unit power supply control unit 403 notifies the operation unit energy saving control unit 402 that the remaining battery power of the secondary battery 940c is low. Here, the predetermined amount is a predetermined remaining battery power.

[0036] The operation unit energy saving control unit 402 cooperates with the main body 202 (main body control unit 412, described later) to control the power state of the operation panel 940. Furthermore, when the operation unit power supply control unit 403 notifies the operation unit 202 (main body control unit 412, described later) that the remaining battery power of the secondary battery 940c is low, the operation unit energy saving control unit 402 notifies the main body 202 (main body control unit 412, described later) of a power state transition request. In this embodiment, when the operation unit energy saving control unit 402 is notified that the remaining battery power of the secondary battery 940c is low, it notifies the main body 202 of an energy saving transition request. Here, the energy saving transition request is a transition request that requests the main body 202 to forcibly transition to an energy saving state.

[0037] The main body 202 of the MFP 9 according to this embodiment includes a main body application 411 and a main body control unit 412, as shown in FIG.

[0038] The main body application 411 is an application that realizes various operations of the main body 202 .

[0039] The main body control unit 412 arbitrates the power states between the main body 202 and the operation panel 940, and transitions the power state of the main body 202. Specifically, when transitioning the power state of the main body 202, the main body control unit 412 inquires of the main body application 411 whether or not the transition of the power state of the main body 202 is permitted. Then, if the main body application 411 does not reject the transition of the power state of the main body 202, the main body control unit 412 transitions the power state of the main body 202. On the other hand, if the main body application 411 rejects the transition of the power state of the main body 202, the main body control unit 412 does not transition the power state of the main body 202.

[0040] However, if the power state of the main body 202 is not transitioned when a request to transition to energy saving mode is received from the operation panel 940, it will be impossible to resolve the mismatch between the power state of the operation panel 940 and the power state of the main body 202 when the remaining battery power of the secondary battery 940c of the operation panel 940 runs out.

[0041] Therefore, when a request to transition to energy saving mode is received from the operation panel 940, the main body control unit 412 transitions the power state of the main body 202 to a predetermined power state without inquiring of the main body application 411 about whether or not the power state of the main body 202 can be transitioned. Here, the predetermined power state is a power state that is set in advance and allows normal operation even if the connection with the operation panel 940 is cut off. In this embodiment, the predetermined power state includes, for example, an energy saving state, such as an engine-off state, in which power supply to the engine of the main body 202 is stopped.

[0042] This makes it possible to avoid inconsistencies in the power states between main body 202 and operation panel 940 due to operation panel 940 becoming inoperable. As a result, in MFP 9 with detachable operation panel 940, even if secondary battery 940c runs out and operation panel 940 becomes inoperable while operation panel 940 is detached, and then secondary battery 940c is charged and operation panel 940 is restored, MFP 9 as a whole can be in an energy-saving state and remain operable.

[0043] Furthermore, when the connection state between the main body 202 and the operation panel 940 returns to a wired connection or when the secondary battery 940c of the operation panel 940 enters a charging state, the main body control unit 412 transitions the main body 202 to the power state before transitioning to the predetermined power state. Alternatively, the main body control unit 412 may maintain the power state of the main body 202 in the predetermined power state.

[0044] 5 is a sequence diagram showing an example of the flow of power state transition processing of the main body 202 and operation panel 940 of the MFP 9 according to this embodiment. Next, an example of the flow of power state transition processing of the main body 202 and operation panel 940 of the MFP 9 according to this embodiment will be described with reference to FIG.

[0045] When an energy saving transition trigger requesting a transition to an energy saving state is input by a timer in the MFP9 or a user operation (step S501), the main body control unit 412 inquires of the operation unit energy saving control unit 402 and the main body application 411 as to whether or not to transition (transition) to an energy saving state (steps S502 and S503).

[0046] The operation unit energy saving control unit 402 inquires of the operation unit application 401 as to whether or not the operation panel 940 can be transitioned (shifted) to an energy saving state (step S504). Then, upon receiving a response to the inquiry as to whether or not the operation panel 940 can be transitioned (shifted) to an energy saving state from the operation unit application 401 (step S505), the operation unit energy saving control unit 402 transmits the response to the main body control unit 412 (step S506).

[0047] Furthermore, main body control unit 412 receives an inquiry response from main body application 411 as to whether or not to transition (shift) to the energy-saving state (step S507). If the inquiry responses received from main body application 411 and operation unit energy-saving control unit 402 all indicate that transition (shift) to the energy-saving state is permitted, main body control unit 412 executes processing to transition the power states of main body 202 and operation panel 940 to the energy-saving state (step S508).

[0048] However, if at least one of the inquiry responses received from the main body application 411 and the operation panel energy saving control unit 402 rejects the transition to the energy saving state, the main body control unit 412 does not transition the main body 202 and the operation panel 940 to the energy saving state.

[0049] Thereafter, the main body control unit 412 notifies the main body application 411 and the operation unit energy saving control unit 402 of an energy saving transition confirmation result notification notifying that the transition (transition) of the energy saving state of the main body 202 and the operation panel 940 has been completed (steps S509 and S510).

[0050] 6 is a sequence diagram showing another example of the flow of the power state transition process of the main body 202 and the operation panel 940 of the MFP 9 according to the present embodiment. Next, with reference to FIG. 6, another example of the flow of the power state transition process of the main body 202 and the operation panel 940 of the MFP 9 according to the present embodiment will be described.

[0051] When the connection state between the main body 202 and the operation panel 940 is wireless, the operation unit power supply control unit 403 detects the remaining battery power of the secondary battery 940c of the operation panel 940 (step S601). Then, when the detected remaining battery power is equal to or less than a preset remaining battery power, the operation unit power supply control unit 403 notifies the operation unit energy saving control unit 402 that the remaining battery power of the secondary battery 940c is low (step S602). The operation unit energy saving control unit 402 notifies the main body control unit 412 of the main body 202 of a request to transition to energy saving mode (step S603).

[0052] When receiving the energy saving mode transition request from the operation unit energy saving control unit 402, the main body control unit 412 executes processing to transition the power states of the main body 202 and the operation panel 940 to the energy saving mode (step S604). After that, the main body control unit 412 notifies the main body application 411 and the operation unit energy saving control unit 402 of an energy saving mode transition confirmation result (steps S605 and S606).

[0053] When the operation unit energy saving control unit 402 receives the energy saving mode transition confirmation result notification from the main body control unit 412, it notifies the operation unit application 401 of the energy saving mode transition confirmation result notification (step S607). After that, the operation unit energy saving control unit 402 executes communication disconnection processing to disconnect the wireless connection with the operation unit dock 201 (step S608).

[0054] Thereafter, the main body control unit 412 and the operation unit energy saving control unit 402 each transition between power states in which they can operate without any problems even if communication is not taking place between the main body 202 and the operation panel 940 (steps S609 and S610).

[0055] As described above, MFP 9 according to the present embodiment can avoid a mismatch in the power states between main body 202 and operation panel 940 due to operation panel 940 becoming inoperable. As a result, in MFP 9 with detachable operation panel 940, even if secondary battery 940c runs out and operation panel 940 becomes inoperable while operation panel 940 is detached, and then secondary battery 940c is charged and operation panel 940 is restored, MFP 9 as a whole can be in an energy-saving state and become operable.

[0056] Each function of the above-described embodiments can be realized by one or more processing circuits. Here, the term "processing circuit" in the present embodiment includes a processor programmed to execute each function by software, such as a processor implemented by an electronic circuit, an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), a conventional circuit module, or other devices designed to execute each function described above.

[0057] Note that the information processing device such as the MFP 9 is not limited to an image forming device as long as it is a device equipped with a communication function. The information processing device may be, for example, a PJ (Projector), an IWB (Interactive White Board: a white board with an electronic blackboard function that allows mutual communication), an output device such as digital signage, a HUD (Head Up Display) device, industrial machinery, an imaging device, a sound collection device, a medical device, a network home appliance, an automobile (Connected Car), a notebook PC (Personal Computer), a mobile phone, a smartphone, a tablet terminal, a game console, a PDA (Personal Digital Assistant), a digital camera, a wearable PC, a desktop PC, or the like.

[0058] The program executed by the MFP 9 of this embodiment is provided by being pre-installed in the ROM 902a etc. The program executed by the MFP 9 of this embodiment may be provided by being recorded in an installable or executable file format on a computer-readable recording medium such as a CD-ROM, a flexible disk (FD), a CD-R, or a digital versatile disk (DVD).

[0059] Furthermore, the program executed by the MFP 9 of the present embodiment may be stored on a computer connected to a network such as the Internet and provided by being downloaded via the network. Also, the program executed by the MFP 9 of the present embodiment may be provided or distributed via a network such as the Internet.

[0060] The program executed by the main body 202 of the MFP9 of this embodiment has a modular structure including each of the above-mentioned parts (such as the main body control unit 412), and in terms of actual hardware, the CPU 901 (an example of a processor) reads and executes the program from the ROM 902a, thereby loading each of the above-mentioned parts onto the main memory device and generating the main body control unit 412 etc. on the main memory device.

[0061] The program executed on the MFP9 operation panel 940 of this embodiment has a modular configuration including the above-mentioned units (operation unit energy saving control unit 402, operation unit power supply control unit 403), and in terms of actual hardware, the CPU (an example of a processor) reads and executes the program from the above-mentioned ROM, thereby loading the above-mentioned units onto the main memory, and the operation unit energy saving control unit 402 and operation unit power supply control unit 403 are generated on the main memory. [Explanation of symbols]

[0062] 9 MFP 201 Control Dock 202 Main Unit 401 Operation unit app 402 Operation unit energy saving control unit 403 Operation unit power supply control unit 411 Main app 412 Main unit control section 901 CPU 902a ROM 902b RAM 940 Operation Panel [Prior art documents] [Patent documents]

[0063] [Patent Document 1] Japanese Patent Application Publication No. 2019-062321

Claims

1. An information processing device having an operation unit and a main body to which the operation unit is detachable and which switches a connection state with the operation unit between a wired connection and a wireless connection, the information processing device controlling power states of the operation unit and the main body in cooperation with each other, The operation unit includes: an operation unit energy saving control unit that, when the connection state between the operation unit and the main body is wireless and the remaining battery charge of the battery of the operation unit drops below a predetermined level, the power state of the operation unit transitions to a sleep state in which power is supplied to maintain information stored in a RAM (Random Access Memory) in the operation unit and power supply to other components is stopped, notifies the main body of a power state transition request; The body includes: an information processing device comprising: a main body control unit that, when receiving the transition request from the operation unit, transitions the power state of the main body to an STR state in which power is supplied to maintain information stored in RAM within the main body and power supply to other components is stopped, or an engine OFF state in which power supply to a cooling fan and engine within the main body is stopped.

2. 2. The information processing device according to claim 1, wherein when the connection state with the operation unit returns to a wired connection or when the battery of the operation unit is in a charging state, the main body control unit transitions the main body to a power state before transitioning to the STR state or the engine OFF state, or maintains the main body in the STR state or the engine OFF state.

3. 1. An information processing method executed by an information processing device having a detachable operation unit, a main body that switches a connection state with the operation unit between a wired connection and a wireless connection, and that cooperatively controls power states of the operation unit and the main body, The main body control unit receiving a power state transition request from the operation unit; a step of transitioning the power state of the main body to an STR state in which power is supplied to maintain information stored in a RAM in the main body and power supply to other components is stopped, or an engine OFF state in which power supply to a cooling fan and an engine in the main body is stopped, when the transition request is received; An information processing method, including:

4. a computer that controls an information processing apparatus having a main body that has a detachable operation unit and that switches a connection state with the operation unit between a wired connection and a wireless connection, and that cooperatively controls the power states of the operation unit and the main body; A program for functioning as a main body control unit that, when receiving a power state transition request from the operation unit, transitions the power state of the main body to an STR state in which power is supplied to maintain information stored in the RAM within the main body and the supply of power to other components is stopped, or to an engine OFF state in which the supply of power to the cooling fan and engine within the main body is stopped.

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