Display device, method for controlling power, and power control program

Abstract

To provide a display device, a method for controlling power, and a power control program capable of properly shutting off power from a standby mode in a display device including a built-in computer.SOLUTION: In a display device (10), a reception processing unit (11) receives a power-off operation for turning off the power of the display device (10). A determination processing unit (12) determines whether an operation state of a built-in computer (2) at the time when the power-off operation is received is in a standby mode. A power processing unit (13) releases the standby mode and shuts off the power of the display device (10) when the operation state of the built-in computer (2) is in the standby mode.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a technology for controlling the power supply of a display device that includes a built-in computer. [Background technology]

[0002] Conventionally, display devices have been known that incorporate a built-in computer (built-in computer) that controls power on / off and runs applications. For example, in an electronic whiteboard (display device) that starts up when the power switch is turned on and stops operating when the power switch is turned off, a technique is known that prevents the loss of displayed information data when the power switch is turned off (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2017 / 064983 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional technology, for example, if the power switch is turned off while the display device has entered standby mode (sleep mode), problems arise in that the power cannot be shut off properly, or data in standby mode may be corrupted.

[0005] An object of the present disclosure is to provide a display device, a power supply control method, and a power supply control program that are capable of normally shutting off power from a standby mode in a display device that includes a built-in computer. [Means for solving the problem]

[0006] A display device according to one aspect of the present disclosure is a display device comprising an internal computer including a power control unit that controls power and a display control unit that executes display processing, and a power supply unit that supplies power to the internal computer. The display device comprises a reception processing unit, a determination processing unit, and a power supply processing unit. The reception processing unit receives a power-off operation to turn off the power of the display device. The determination processing unit determines whether the operating state of the internal computer is in standby mode when the power-off operation is received. If the operating state of the internal computer is in standby mode, the power supply processing unit cancels the standby mode and cuts off the power to the display device.

[0007] A power control method according to another aspect of the present disclosure is a power control method for controlling the power supply of a display device including an embedded computer including a power control unit that controls the power supply and a display control unit that executes display processing, and a power supply unit that supplies power to the embedded computer. The power control method is executed by one or more processors to: receive a power-off operation to turn off the power supply of the display device; determine whether the operating state of the embedded computer when the power-off operation is received is a standby mode; and, if the operating state of the embedded computer is the standby mode, cancel the standby mode and cut off the power supply of the display device.

[0008] A power control program according to another aspect of the present disclosure is a power control program for controlling the power supply of a display device including an embedded computer including a power control unit that controls the power supply and a display control unit that executes display processing, and a power supply unit that supplies power to the embedded computer. The power control program causes one or more processors to execute the following operations: receiving a power-off operation to turn off the power supply of the display device; determining whether the operating state of the embedded computer when the power-off operation is received is a standby mode; and, if the operating state of the embedded computer is the standby mode, canceling the standby mode and cutting off the power supply of the display device. [Effects of the Invention]

[0009] According to the present disclosure, it is possible to provide a display device, a power supply control method, and a power supply control program that are capable of normally cutting off power from a standby mode in a display device that includes a built-in computer. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a functional block diagram showing the configuration of a display device according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a diagram showing an example of waiting information (files in operation) held in the display device according to the embodiment of the present disclosure. [Figure 3] FIG. 3 is a diagram illustrating an example of standby information (application) stored in the display device according to the embodiment of the present disclosure. [Figure 4] FIG. 4 is a diagram illustrating an example of a lock screen displayed on a display device according to an embodiment of the present disclosure. [Figure 5] FIG. 5 is a flowchart showing an example of a procedure of a power supply control process executed in a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Note that the following embodiments are examples that embody the present disclosure and do not limit the technical scope of the present disclosure.

[0012] The display device 10 of the present disclosure includes an internal computer 2 that includes a power supply control unit 21 that controls the power supply and a display control unit 22 that executes display processing, and a power supply unit 3 that supplies power to the internal computer 2. In other words, the display device 10 is a display device with a built-in computer (the internal computer 2) that controls the ON / OFF of the power supply and runs applications.

[0013] In such display devices with built-in computers, power is supplied from the display device to the built-in computer, but it is difficult to grasp the operating state of the built-in computer (OFF state, ON state, standby state (standby mode)) from the display device. Furthermore, when the display device switches to standby mode, the data being worked on is stored as standby information. Therefore, if a user turns off the power while the display device is in standby mode, the power to the built-in computer is cut off before the standby information can be processed (e.g., saved), resulting in the standby information being corrupted or lost. For example, as shown in FIG. 2, if the power switch B1 of the display device 10 is pressed (OFF operation) while the built-in computer 2 is in standby mode and retaining standby information such as working data, the power supply to the built-in computer 2 is cut off, forcing the device to enter a power-off state, resulting in the standby information being corrupted or lost, and the power cannot be shut off properly.

[0014] In contrast, the display device 10 according to the present disclosure has a configuration that allows the display device 10 equipped with the built-in computer 2 to normally shut down the power supply from the standby mode.

[0015] Specifically, as shown in FIG. 1, the display device 10 includes a control device 1, an internal computer 2, a power supply unit 3, and a storage device 4.

[0016] The power supply unit 3 is a power supply section that supplies power to the control device 1 and the built-in computer 2. When the power cord plug is connected to an outlet, the power supply unit 3 takes in power from the outlet, performs processes such as rectification, smoothing, and voltage transformation, and supplies power to the control device 1 and the built-in computer 2. The power supply unit 3 may also take in power from a battery (such as a rechargeable battery or built-in battery) and supply power to the control device 1 and the built-in computer 2.

[0017] Furthermore, the power supply unit 3 controls the power ON / OFF of the built-in computer 2 according to instructions (power supply control commands) from the control device 1. For example, when the control device 1 sends a power ON power supply control command to the power supply unit 3, the power supply unit 3 supplies power to the built-in computer 2. When the control device 1 sends a power OFF power supply control command to the power supply unit 3, the power supply unit 3 stops supplying power to the built-in computer 2.

[0018] The built-in computer 2 includes a power supply control unit 21 and a display control unit 22, and executes processing in response to control commands sent from the control device 1. The built-in computer 2 also includes a storage device (built-in computer storage device 23) that stores data such as data files processed by the built-in computer 2.

[0019] The power supply control unit 21 controls the power supply of the built-in computer 2. Specifically, the power supply control unit 21 controls the power supplied from the power supply unit 3 to control the operating state of the built-in computer 2. For example, the power supply control unit 21 turns the power supply of the built-in computer 2 ON, OFF (shutdown), or transitions to standby mode in accordance with instructions (control commands) from the control device 1. In this way, the power supply control unit 21 switches the operating state (operating status) of the built-in computer 2 in accordance with the control commands from the control device 1.

[0020] The display control unit 22 displays various information on the display screen of the display device 10. For example, the display control unit 22 displays a screen corresponding to the data being worked on when the power is on. Furthermore, when the display mode shifts to standby mode, the display control unit 22 makes the display screen non-displayed. Furthermore, when the standby mode is released, the display control unit 22 displays a lock screen (for example, a password input screen) (see FIG. 4).

[0021] The storage device 4 is a non-volatile storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a flash memory that stores various types of information. The storage device 4 stores a control program, such as a power control program, for causing the control device 1 to execute a power control process (see FIG. 5 ), which will be described later. For example, the power control program is non-temporarily recorded on a computer-readable recording medium such as a USB, CD, or DVD, and is read by a reading device (not shown), such as a USB drive, CD drive, or DVD drive, electrically connected to the display device 10, and stored in the storage device 4. The power control program may also be downloaded from a server accessible from the display device 10 and stored in the storage device 4.

[0022] The control device 1 has control devices such as a CPU, a ROM, and a RAM. The CPU is a processor that executes various types of arithmetic processing. The ROM is a non-volatile storage unit that pre-stores control programs such as a BIOS and an OS that cause the CPU to execute various types of arithmetic processing. The RAM is a volatile or non-volatile storage unit that stores various types of information and is used as a temporary storage memory (work area) for the various types of processing executed by the CPU. The control device 1 controls the display device 10 by having the CPU execute various control programs pre-stored in the ROM or the storage device 4.

[0023] Specifically, as shown in Fig. 1, the control device 1 includes various processing units such as a reception processing unit 11, a determination processing unit 12, a power supply processing unit 13, and a storage processing unit 14. The control device 1 functions as the various processing units by executing various processes in accordance with the power supply control program using the CPU. Some or all of the processing units may be configured with electronic circuits. The power supply control program may be a program for causing multiple processors to function as the processing units. Equipped with.

[0024] The reception processing unit 11 accepts various operations from the user on the display device 10. For example, the reception processing unit 11 accepts a power-on operation to turn on the power of the display device 10 and a power-off operation to turn off the power. For example, when the user presses the power switch B1 of the display device 10, the reception processing unit 11 accepts the power-on operation or the power-off operation. The reception processing unit 11 may also accept an operation from the user to transition to standby mode.

[0025] The determination processing unit 12 determines the operating state of the built-in computer 2 when the reception processing unit 11 receives a power-off operation from the user. For example, the determination processing unit 12 determines whether the operating state of the built-in computer 2 when the power-off operation is received is in standby mode. The determination processing unit 12 obtains power status information from the built-in computer 2 and determines the operating state of the built-in computer 2.

[0026] The power supply processing unit 13 controls the power supply of the built-in computer 2 and the display device 10. Specifically, the power supply processing unit 13 sends power control commands to the power supply unit 3 to control the ON / OFF of the power supply of the built-in computer 2 and the display device 10. The power supply processing unit 13 also controls the ON / OFF of the power supply of the built-in computer 2 and the display device 10 according to the operating state of the built-in computer 2 (ON state, OFF state, standby mode). For example, when the operating state of the built-in computer 2 is standby mode, the power supply processing unit 13 cancels the standby mode and cuts off the power supply of the display device 10. The power supply processing unit 13 also cuts off the power supply of the display device 10 after stopping the power supply from the power supply unit 3 to the built-in computer 2 and turning the built-in computer 2 OFF.

[0027] The save processing unit 14 saves data (standby information) being processed by the built-in computer 2. Specifically, the save processing unit 14 saves data (files in progress) being processed by the built-in computer 2 when the reception processing unit 11 receives a power-off operation from the user. For example, the save processing unit 14 sends a save command (control command) for the files in progress to the built-in computer 2, causing the built-in computer 2 to temporarily save the files in progress in the built-in computer storage device 23. The save processing unit 14 also causes the built-in computer 2 to temporarily save the files in progress in the built-in computer storage device 23 before the power to the built-in computer 2 is turned off.

[0028] In this way, the control device 1 temporarily saves the file being worked on, and then transitions the operating status of the built-in computer 2 to a power-off state (a state in which the built-in computer 2 can be shut down). Then, after turning off the power to the built-in computer 2, the control device 1 turns off the power to the display device 10 main body. This allows the display device 10 main body to be safely powered off (shut down).

[0029] For example, the control device 1 acquires status information about the ON / OFF state of the built-in computer 2 through an interface (e.g., a power status terminal) between the control device 1 and the built-in computer 2. Next, when the built-in computer 2 is in standby mode, the control device 1 sends a control command through the interface (e.g., a USB port or a power control terminal) to cancel the standby mode and switch the power to the ON state.

[0030] Next, the control device 1 executes a predetermined process when the built-in computer 2 transitions from standby mode to ON state. Specifically, the control device 1 executes processes such as login authentication and temporarily saving files in progress, and then makes the built-in computer 2 ready to be powered off. Finally, the control device 1 sends a power-off control command to the built-in computer 2, turning the built-in computer 2 power off. In this way, the control device 1 saves files in progress after the built-in computer 2 exits standby mode, and then turns the built-in computer 2 power off.

[0031] This allows the display device 10 to be powered off. Therefore, the display device 10 can be powered off normally without damaging the data (files in progress) on the built-in computer 2.

[0032] Here, a specific example of processing when there are open files will be described. For example, as shown in FIG. 3, if there are open files when the user presses the power switch B1 to turn off the power, the display device 10 cannot be shut down unless the open files are closed. In response to this, when the control device 1 receives a power-off command from the user, it acquires screen information from the built-in computer 2 and determines whether there are any applications that are preventing the power from being turned off (shutdown). For example, the control device 1 determines whether there are any applications that are preventing the power from being turned off based on task information, icon information, etc. If such applications exist, the control device 1 temporarily saves the open files and executes processing to close all open files. In this way, even if a power-off command is received when there are open files (applications are running), the display device 10 can be shut down normally while preventing damage to the open files.

[0033] Next, a specific example of authentication processing will be described. For example, as shown in FIG. 4, if a lock screen is displayed when the display device 10 returns from standby mode, the display device 10 cannot be shut down unless a user name and password are entered. In response to this, the control device 1 captures and saves the user name and password entered in advance (for example, when the display device 10 is started up). When the display device 10 returns from standby mode, it automatically inputs the saved user name and password. As a result, when the user is authenticated, the lock screen is released and the display device 10 is switched to the desktop screen, allowing temporary saving of files being worked on and shutdown of the display device 10. In this way, the control device 1 outputs authentication information required to release standby mode to the built-in computer 2, and when the built-in computer 2 executes authentication processing and releases standby mode, it cuts off power to the display device 10.

[0034] As described above, even if there are files in progress when the control device 1 receives the power-off operation, or if the control device 1 returns from standby mode and is requested to enter authentication information, it can properly save the files in progress and safely power off (shut down) the built-in computer 2 and the display device 10 itself.

[0035] [Power control processing] The power control process executed by the control device 1 according to this embodiment will be described below with reference to FIG. 5. Note that the present disclosure can be understood as a power control method that executes one or more steps included in the power control process, and one or more steps included in the power control process described herein may be omitted as appropriate. Note that the steps in the power control process may be executed in a different order as long as the same operational effect is achieved. Furthermore, although the description here takes as an example a case in which the control device 1 executes each step in the power control process, another embodiment may also be a power control method in which the steps in the power control process are executed in a distributed manner by multiple processors.

[0036] First, in step S1, the control device 1 determines whether or not a power-off operation has been received from the user when the power of the display device 10 is in an ON state. For example, when the user presses the power switch B1 while the power is in an ON state, the control device 1 receives the power-off operation. When the control device 1 receives the power-off operation (S1: Yes), the control device 1 shifts the processing to step S2. The control device 1 maintains the power-on state and waits until the power-off operation is received (S1: No).

[0037] In step S2, the control device 1 checks the power state (power status) of the built-in computer 2. For example, the control device 1 obtains status information from the built-in computer 2 and determines whether the built-in computer 2 is powered on, powered off, or in standby mode. If the built-in computer 2 is powered on, the control device 1 proceeds to step S3; if the built-in computer 2 is powered off, the control device 1 proceeds to step S7; and if the built-in computer 2 is in standby mode, the control device 1 proceeds to step S21.

[0038] If the power supply is in standby mode, the control device 1 cancels the standby mode in step S21. For example, the control device 1 sends a control command to the built-in computer 2 to cancel the standby mode, thereby canceling the standby mode and transitioning to the ON state. After step S21, the control device 1 transitions the process to step S3.

[0039] When the power is ON (S2: "ON") or when the standby mode is released (S21), the control device 1 determines in step S3 whether the display screen is a lock screen (e.g., a password entry screen) (see FIG. 4). When the standby mode is released and the lock screen is displayed on the display screen (S3: Yes), the control device 1 shifts the process to step S31. On the other hand, when the display screen is not the lock screen (S3: No), for example, when the display screen is a desktop screen, the control device 1 shifts the process to step S4.

[0040] In step S31, the control device 1 executes authentication processing to release the lock screen. For example, the control device 1 automatically inputs authentication information such as a pre-registered user name and password, and causes the built-in computer 2 to execute the authentication processing. When the built-in computer 2 authenticates the automatically input authentication information, it releases the lock screen and displays the desktop screen. After step S31, the control device 1 shifts the processing to step S3.

[0041] If the display screen is the desktop screen (S3: No), the control device 1 determines in step S4 whether or not an active file (running application) exists. If an active file exists (S4: Yes) (see FIG. 3), the control device 1 shifts the process to step S41. On the other hand, if an active file does not exist (S4: No), the control device 1 shifts the process to step S5.

[0042] In step S41, the control device 1 saves the working file. Specifically, the control device 1 sends a save command (control command) for the working file to the built-in computer 2, causing the built-in computer 2 to temporarily save the working file in the built-in computer storage device 23. After step S41, the control device 1 shifts the process to step S4. The control device 1 repeatedly executes the process for saving the working file until there are no working files left (until all running applications are closed).

[0043] When there are no more open files (S4: No), in step S5, the control device 1 turns off the power to the built-in computer 2. Specifically, the control device 1 causes the built-in computer 2 to execute a power-off operation. For example, the control device 1 stops the power supply from the power supply unit 3 to the built-in computer 2, causing the built-in computer 2 to execute a power-off operation.

[0044] Next, in step S6, the control device 1 determines whether the power supply to the built-in computer 2 has been turned off. Specifically, the control device 1 acquires status information from the built-in computer 2 and determines whether the power supply is turned off. If the power supply to the built-in computer 2 is turned off (S6: Yes), the control device 1 shifts the process to step S7. The control device 1 waits until the power supply to the built-in computer 2 is turned off (S6: No).

[0045] Finally, in step S7, the control device 1 cuts off (shuts down) the power supply to the main body of the display device 10. In this way, the control device 1 temporarily saves the open file, cuts off the power supply to the built-in computer 2, and then shuts down the main body of the display device 10. The control device 1 executes the above-described process every time it receives an operation to turn off the power supply to the display device 10 from the user.

[0046] As described above, the display device 10 according to this embodiment determines whether the operating state of the built-in computer 2 is in standby mode when a power-off operation to turn off the power of the display device 10 is received, and if the operating state of the built-in computer 2 is standby mode, cancels the standby mode and cuts off the power to the display device 10. The display device 10 also saves data being processed in the built-in computer 2 when the power-off operation is received, and after saving the data, stops the power supply from the power supply unit 3 to the built-in computer 2 and cuts off the power to the display device 10. The display device 10 also saves the data after the built-in computer 2 cancels standby mode.

[0047] According to the above configuration, when the power switch B1 is turned off while the display device 10 has transitioned to standby mode, the data being processed in the built-in computer 2 is temporarily saved, the power to the built-in computer 2 is then turned off, and the display device 10 is then shut down. This makes it possible to properly shut down the display device 10 from standby mode while preventing corruption of the data being processed.

[0048] The display device according to the present disclosure is a display device with a built-in computer, and is applicable to, for example, digital signage displays, personal computers, and the like.

[0049] [Disclosure Note] The following is a summary of the disclosure extracted from the above-described embodiment. Note that the configurations and processing functions described in the following supplementary notes can be selected and combined as desired.

[0050] <Appendix 1> A display device comprising: an internal computer including a power supply control unit that controls a power supply and a display control unit that executes display processing; and a power supply unit that supplies power to the internal computer, a reception processing unit that receives a power-off operation for turning off the power of the display device; a determination processing unit that determines whether the operating state of the built-in computer is in a standby mode when the power-off operation is received; a power supply processing unit that, when the operation state of the built-in computer is in the standby mode, cancels the standby mode and cuts off power to the display device; A display device comprising:

[0051] <Appendix 2> a storage processing unit that stores data being processed in the built-in computer when the power-off operation is received, the power supply processing unit stops the power supply from the power supply unit to the built-in computer after the storage processing unit has stored the data, and cuts off the power supply to the display device; 10. The display device according to claim 1.

[0052] <Appendix 3> the storage processing unit stores the data after the built-in computer releases the standby mode; 3. The display device according to claim 2.

[0053] <Appendix 4> the power supply processing unit outputs authentication information required to cancel the standby mode to the built-in computer, and when the authentication process is executed in the built-in computer and the standby mode is canceled, cuts off the power supply to the display device. 4. The display device according to any one of appendixes 1 to 3.

[0054] <Appendix 5> the power supply processing unit stops the power supply from the power supply unit to the built-in computer, and after the built-in computer is turned off, cuts off the power supply to the display device; 5. The display device according to any one of appendices 1 to 4.

[0055] <Appendix 6> the reception processing unit receives the power-off operation from a user to turn off a power switch disposed on the display device main body; 6. The display device according to any one of appendices 1 to 5. [Explanation of symbols]

[0056] 10:Display device 1: Control device 2: Built-in computer 3: Power supply unit 4: Storage device 11: Reception processing section 12: Judgment processing unit 13: Power supply processing section 14: Save processing section 21: Power supply control unit 22: Display control section 23: Internal computer storage device B1: Power switch

Claims

1. A display device comprising: an internal computer including a power supply control unit that controls a power supply and a display control unit that executes display processing; and a power supply unit that supplies power to the internal computer, a reception processing unit that receives a power-off operation for turning off the power of the display device; a determination processing unit that determines whether the operating state of the built-in computer is in a standby mode when the power-off operation is received; a power supply processing unit that, when the operation state of the built-in computer is in the standby mode, cancels the standby mode and cuts off power to the display device; A display device comprising:

2. a storage processing unit that stores data being processed by the built-in computer when the power-off operation is received, the power supply processing unit stops the power supply from the power supply unit to the built-in computer after the storage processing unit has stored the data, and cuts off the power supply to the display device; The display device according to claim 1 .

3. the storage processing unit stores the data after the built-in computer releases the standby mode; The display device according to claim 2 .

4. the power supply processing unit outputs authentication information required to cancel the standby mode to the built-in computer, and when the authentication process is executed in the built-in computer and the standby mode is canceled, cuts off the power supply to the display device. The display device according to claim 1 .

5. the power supply processing unit stops the power supply from the power supply unit to the built-in computer, and after the built-in computer is turned off, cuts off the power supply to the display device; The display device according to claim 1 .

6. the reception processing unit receives, from a user, the power-off operation of turning off a power switch disposed on the display device body; The display device according to claim 1 .

7. A power supply control method for controlling the power supply of a display device including an internal computer including a power supply control unit that controls the power supply and a display control unit that executes display processing, and a power supply unit that supplies power to the internal computer, comprising: receiving a power-off operation to turn off the power of the display device; determining whether the operating state of the built-in computer is in a standby mode when the power-off operation is received; When the operation state of the built-in computer is in the standby mode, canceling the standby mode and cutting off the power supply of the display device; A power control method executed by one or more processors.

8. A power supply control program for controlling the power supply of a display device including an internal computer including a power supply control unit that controls the power supply and a display control unit that executes display processing, and a power supply unit that supplies power to the internal computer, receiving a power-off operation to turn off the power of the display device; determining whether the operating state of the built-in computer is in a standby mode when the power-off operation is received; When the operation state of the built-in computer is in the standby mode, canceling the standby mode and cutting off the power supply of the display device; A power control program to be executed by one or more processors.

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