Display device control method, display device, and storage medium

Abstract

Provided are a display device control method, a display device, and a storage medium. The control method comprises: a central processing unit receives a screen-off control instruction sent by a master device, and separately outputs a screen-off signal to an enable end of a backlight power supply control circuit and a first control signal input end of a panel power supply control circuit (S101); on the basis of the screen-off signal, the enable end controls the backlight power supply control circuit to stop working, to disconnect a backlight power supply input end from a backlight power supply output end (S102); and on the basis of the screen-off signal, the first control signal input end controls a first switch element to be disconnected, so as to disconnect a panel power supply input end from a panel power supply output end (S103). By means of the control method, the convenience of a master device controlling the screen display of a slave device is improved.

Description

Control method of display device, display device and storage medium Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a control method for a display device, a display device, and a storage medium. Background Art

[0002] When using display devices for teaching, a master device is usually used to control the playback content of multiple slave devices to achieve the teaching purpose. In traditional solutions, when using the master device to control the slave devices, there is a problem of complex operation.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a control method for a display device, a display device, and a storage medium. The master device can control the display screen of the slave device by directly sending a first control instruction, thereby improving the convenience of the master device in controlling the screen display of the slave device.

[0005] In a first aspect, an embodiment of the present application provides a display device control method, which is applied to a display device, the display device comprising: a central processing unit, a display panel, a display panel power supply, a backlight module, a backlight module power supply, a panel power supply control circuit, and a backlight power supply control circuit, the central processing unit being connected to the panel power supply control circuit and the backlight power supply control circuit, respectively; the display panel power supply being connected to the display panel via the panel power supply control circuit; the backlight module power supply being connected to the backlight module via the backlight power supply control circuit; and the central processing unit being in a continuously powered-on state;

[0006] The backlight power control circuit includes an enable terminal, a backlight power input terminal and a backlight power output terminal, the central processing unit is connected to the enable terminal, the backlight module power supply is connected to the backlight power input terminal, and the backlight module is connected to the backlight power output terminal;

[0007] The panel power control circuit includes a first control signal input terminal, a first switching element, a panel power input terminal, and a panel power output terminal, the central processing unit is connected to the first control signal input terminal, the display panel power supply is connected to the panel power input terminal, the display panel is connected to the panel power output terminal, the first control signal input terminal is connected to the first terminal of the first switching element, the panel power input terminal is connected to the second terminal of the first switching element, and the panel power output terminal is connected to the third terminal of the first switching element;

[0008] The method comprises:

[0009] The central processing unit receives a screen off control instruction sent by the host device, and outputs a screen off signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit respectively;

[0010] The enabling end controls the backlight power control circuit to stop working according to the screen off signal, so as to disconnect the backlight power input end and the backlight power output end;

[0011] The first control signal input terminal controls the first switch element to be turned off according to the screen-off signal, so as to disconnect the panel power input terminal and the panel power output terminal.

[0012] In a second aspect, an embodiment of the present application provides a computer storage medium, which stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the steps of the above method.

[0013] In a third aspect, an embodiment of the present application provides a display device, comprising: a central processing unit, a display panel, a display panel power supply, a backlight module, a backlight module power supply, a panel power supply control circuit, and a backlight power supply control circuit, wherein the central processing unit is connected to the panel power supply control circuit and the backlight power supply control circuit, respectively; the display panel power supply is connected to the display panel via the panel power supply control circuit; the backlight module power supply is connected to the backlight module via the backlight power supply control circuit; and the central processing unit is in a continuously powered-on state;

[0014] The backlight power control circuit includes an enable terminal, a backlight power input terminal and a backlight power output terminal, the central processing unit is connected to the enable terminal, the backlight module power supply is connected to the backlight power input terminal, and the backlight module is connected to the backlight power output terminal;

[0015] The panel power control circuit includes a first control signal input terminal, a first switching element, a panel power input terminal and a panel power output terminal. The central processing unit is connected to the first control signal input terminal, the display panel power supply is connected to the panel power input terminal, the display panel is connected to the panel power output terminal, the first control signal input terminal is connected to the first terminal of the first switching element, the panel power input terminal is connected to the second terminal of the first switching element, and the panel power output terminal is connected to the third terminal of the first switching element.

[0016] In an embodiment of the present application, the master device can control the disconnection between the panel power input terminal and the panel power output terminal, the disconnection between the backlight power input terminal and the backlight power output terminal, and the connectivity status of the video signal conversion circuit of multiple slave devices by sending a screen-off control instruction to the slave device; the master device can control the connectivity status of the audio playback devices of multiple slave devices by sending a screen-off control instruction to the slave device, thereby improving the convenience of the master device in controlling the slave device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] FIG1 is a schematic diagram of a scenario of a method for controlling a display device provided in an embodiment of the present application;

[0019] FIG2 is a schematic diagram of a structure of a display device control provided by an embodiment of the present application;

[0020] FIG2A is a schematic structural diagram of a display device control according to an embodiment of the present application;

[0021] FIG2B is a schematic diagram of a structure of a display device control provided by an embodiment of the present application;

[0022] FIG3 is a schematic flow chart of a method for controlling a display device according to an embodiment of the present application;

[0023] FIG4 is a schematic flow chart of a method for controlling a display device according to an embodiment of the present application;

[0024] FIG4A is a schematic diagram of a structure of a display device control provided by an embodiment of the present application;

[0025] FIG4B is a schematic diagram of a structure of a display device control provided by an embodiment of the present application;

[0026] FIG5 is a schematic structural diagram of a display device provided in an embodiment of the present application;

[0027] FIG5A is a schematic diagram of a structure of a display device control provided by an embodiment of the present application;

[0028] FIG6 is a schematic flow chart of a method for controlling a display device according to an embodiment of the present application;

[0029] FIG6A is a schematic structural diagram of a display device control according to an embodiment of the present application;

[0030] FIG6B is a schematic diagram of a structure of a display device control provided by an embodiment of the present application;

[0031] FIG7 is a schematic flow chart of a method for controlling a display device according to an embodiment of the present application;

[0032] FIG8 is a schematic flow chart of a method for controlling a display device according to an embodiment of the present application;

[0033] FIG9 is a schematic flow chart of a method for controlling a display device according to an embodiment of the present application;

[0034] FIG9A is a schematic structural diagram of a display device control according to an embodiment of the present application;

[0035] FIG10 is a schematic flow chart of a method for controlling a display device according to an embodiment of the present application;

[0036] FIG11 is a schematic flow chart of a method for controlling a display device according to an embodiment of the present application;

[0037] FIG12 is a flow chart of a method for controlling a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In the description of this application, it should be noted that, unless otherwise expressly specified and limited, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to two or more. "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0040] In traditional computer room control solutions, when a teacher uses a teacher's computer to control a student computer to enter a black screen display, the control method is as follows: upon receiving the instruction to enter a black screen display, the student computer's central processing unit outputs a black image, which is then displayed on the student computer's display interface. When using this method to control the display screen to enter a black screen, there is the problem that the display screen is not completely turned off, which not only wastes energy but also reduces the lifespan of the display screen. Another method of controlling the black screen of a slave device is to remotely control the slave device to shut down through a remote control program installed on the slave device. During the remote control shutdown process, the screen off control command is issued by the control program, which is actually issued by the local machine and executed locally. This method of controlling the black screen directly shuts down the slave device, that is, the display screen, backlight, and CPU of the display device are all turned off. When the slave device needs to be controlled to display again, it needs to be manually turned on. Therefore, when using the teacher's computer to control the student computer in the traditional solution, the operation is complicated and fails to achieve the expected results.

[0041] The present application proposes a control method for a display device, which is applied to a display device, wherein the display device includes a central processing unit, a display panel, a display panel power supply, a backlight module, a backlight module power supply, a panel power supply control circuit, and a backlight power supply control circuit, the backlight power supply control circuit including an enable terminal, a backlight power supply input terminal, and a backlight power supply output terminal, the panel power supply control circuit including a first control signal input terminal, a first switching element, a panel power supply input terminal, and a panel power supply output terminal, and when the central processing unit of the display device receives a screen off control instruction sent by a master device, it outputs a screen off signal to the enable terminal of the backlight power supply control circuit and the first control signal input terminal of the panel power supply control circuit, the first control signal input terminal disconnects the connection between the panel power supply input terminal and the panel power supply output terminal, and the enable terminal disconnects the connection between the backlight power supply input terminal and the backlight power supply output terminal. Compared with traditional remote control schemes, the present application uses the panel power supply control circuit and the backlight power supply control circuit to realize that the display device controls the disconnection of the power supply connection of the display panel and the backlight module of the display device based on the screen off control instruction received from other display devices, thereby improving the convenience of the master device controlling the disconnection of the power supply of the display panel and the backlight module from the slave device.

[0042] Refer to Figure 1, which is a schematic diagram of a scenario in an embodiment of the present application.

[0043] As shown in Figure 1, the teacher controls the student end, i.e., slave devices A, B, C, D, and E, on the master device. When the teacher needs to control the screen display of the slave device, a screen off control instruction is sent to the slave device. After receiving the screen off control instruction, the central processing unit of the slave device outputs a screen off signal to the enable end of the backlight power control circuit and the first control signal input end of the panel power control circuit, disconnecting the connection between the panel power input end and the panel power output end, and disconnecting the connection between the backlight power input end and the backlight power output end. The panel power control circuit and the backlight power control circuit enable the display device to control the disconnection of the display panel of the display device and the power connection of the backlight module of the display device based on the screen off control instruction received from other display devices, thereby improving the convenience of the master device controlling the slave device.

[0044] Furthermore, when the teacher needs to control the audio playback devices of slave devices A, B, C, D, or E, they send a screen-off control command to the slave device. After receiving the screen-off control command, the central processor of the slave device determines the audio control signal corresponding to the screen-off control command and sends the audio control signal to the power amplifier circuit and the audio signal conversion circuit. The power amplifier circuit controls its connection status with the first audio playback device based on the audio control signal; the audio signal conversion circuit controls its connection status with the power amplifier circuit, the second audio playback device, and the third audio playback device based on the audio signal conversion circuit.

[0045] In an embodiment of the present application, the master device can control the disconnection between the panel power input terminal and the panel power output terminal, the disconnection between the backlight power input terminal and the backlight power output terminal, and the connectivity status of the video signal conversion circuit of multiple slave devices by sending a screen-off control instruction to the slave device; the master device can control the connectivity status of the audio playback devices of multiple slave devices by sending a screen-off control instruction to the slave device, thereby improving the convenience of the master device in controlling the slave device.

[0046] The control method of the display device provided in the embodiment of the present application will be described in detail below with reference to Figures 2 to 12.

[0047] Referring to Figure 2, which is a schematic diagram of the structure of the display device of the present application, the display device includes: a display screen, a central processing unit, a panel power control circuit, and a backlight power control circuit. The backlight power control circuit is connected to the central processing unit and the display screen, respectively, and the panel power control circuit is connected to the central processing unit and the display screen, respectively.

[0048] In addition, the display device also includes: a central processing unit, a display panel, a display panel power supply, a backlight module, a backlight module power supply, a panel power supply control circuit and a backlight power supply control circuit. The central processing unit is connected to the panel power supply control circuit and the backlight power supply control circuit respectively. The display panel power supply is connected to the display panel through the panel power supply control circuit. The backlight module power supply is connected to the backlight module through the backlight power supply control circuit. The central processing unit is in a continuously powered-on state.

[0049] 2A , the backlight power control circuit includes an enable terminal, a backlight power input terminal, and a backlight power output terminal. The central processing unit is connected to the enable terminal, the backlight module power supply is connected to the backlight power input terminal, and the backlight module is connected to the backlight power output terminal.

[0050] Referring to Figure 2B, the panel power control circuit includes a first control signal input terminal, a first switching element, a panel power input terminal and a panel power output terminal. The central processing unit is connected to the first control signal input terminal, the display panel power supply is connected to the panel power input terminal, the display panel is connected to the panel power output terminal, the first control signal input terminal is connected to the first terminal of the first switching element, the panel power input terminal is connected to the second terminal of the first switching element, and the panel power output terminal is connected to the third terminal of the first switching element.

[0051] The central processing unit is used to implement data processing for the display device. It can be used to generate corresponding control signals (such as screen off signals) based on received control instructions (for example, screen off control instructions), output video signals to the backlight module and display panel, output audio signals to the audio playback device, etc.; the panel power control circuit can be used to control the disconnection or connection between the panel power input terminal and the panel power output terminal based on the received control signal; the backlight power control circuit can be used to control the disconnection between the backlight power input terminal and the backlight power output terminal based on the received control signal; the audio signal conversion circuit can be used to convert the received audio digital signal into an audio analog signal that can be played by the audio playback device, and control the connection with the power amplifier circuit, the second audio playback device, and the third audio playback device based on the received audio control signal; the power amplifier circuit can be used to amplify the received audio analog signal to drive the audio playback device to produce stronger sound.

[0052] The display device also includes a network connection interface, an Ethernet chip, and a wired network port. The wired network port and the Ethernet chip are connected via a local area network (LAN). The central processing unit receives communication data sent by the Ethernet chip via the high-speed serial computer expansion bus standard (Peripheral Component Interconnect Express, PCIE interface), thereby enabling data transmission between the master device and the slave device. For example, the master device can send a screen off control command or a screen on control command to the slave device.

[0053] Specifically, the PCIE interface and the Ethernet PHY chip implement wired network transmission, thereby achieving communication between the central processing units of the master device and the slave device.

[0054] The display device also includes an I2C interface, which is connected between the central processing unit and the audio signal conversion circuit and is used to enable the central processing unit to read and configure the internal registers of the audio signal conversion circuit.

[0055] 3 , which is a flow chart of a method for controlling a display device according to the present invention, the method for controlling a display device as shown in FIG3 includes steps S101 to S103 .

[0056] S101, the central processing unit receives a screen off control instruction sent by the host device, and outputs a screen off signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit respectively;

[0057] The master device may be a device capable of controlling other devices, such as a laptop, an all-in-one computer, or an interactive tablet, and may include one or more. Optionally, in the embodiment of the present application, one master device is used as an example for illustration.

[0058] The screen off control instruction can be used by the master device to control the slave device to turn off the display panel and backlight module.

[0059] The screen-off signal may be a control signal output by the central processing unit based on the screen-off control instruction.

[0060] Optionally, the screen-off control instruction sent by the master device can be triggered based on a user action. For example, there is a physical button on the master device that allows the slave device to black out its screen. When the master device detects that the physical button is touched or pressed, it sends the screen-off control instruction to the slave device.

[0061] Optionally, software for controlling the slave device may be installed on the master device. A software button for "controlling the slave device screen to black out" is displayed on the software's running interface. When the master device detects that a user has clicked, touched, or clicked the software button, it sends a screen-off control instruction to the slave device.

[0062] After receiving the screen off control instruction, the central processor of the display device determines the screen off signal of the screen off control instruction and sends the screen off signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit respectively.

[0063] S102, the enabling end controls the backlight power control circuit to stop working according to the screen off signal, so as to disconnect the backlight power input end and the backlight power output end;

[0064] After receiving the screen off signal, the enable end controls the backlight power control circuit to stop working and disconnects the connection between the backlight power input end and the backlight power output end. As a result, the backlight module power cannot be output to the backlight module through the backlight power control circuit, and the power of the backlight module is disconnected.

[0065] S103: The first control signal input terminal controls the first switch element to be turned off according to the screen off signal, so as to disconnect the panel power input terminal and the panel power output terminal.

[0066] The first control signal input terminal controls the first switching element to be disconnected based on the received screen off signal, thereby disconnecting the connection between the panel power input terminal and the panel power output terminal, thereby preventing the display panel power from being output to the display panel through the panel power control circuit, thereby disconnecting the power of the display panel.

[0067] The display screen of the display device includes a display panel and a backlight module. After receiving the screen off control instruction, the display device calls the screen off signal control to disconnect the connection between the panel power input terminal and the panel power output terminal and disconnect the connection between the backlight power input terminal and the backlight power output terminal according to the screen off control instruction. In this way, the display device can turn off the display screen according to the screen off control instruction.

[0068] In an embodiment of the present application, when the central processing unit of the display device receives a screen-off control instruction sent by the master device, it outputs a screen-off signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit. The first control signal input terminal disconnects the panel power input terminal from the panel power output terminal, and the enable terminal disconnects the backlight power input terminal from the backlight power output terminal. Compared to traditional remote control solutions, the present application uses the panel power control circuit and the backlight power control circuit to realize that the display device controls the disconnection of the power supply connection of the display panel of the display device and the backlight module of the display device based on the screen-off control instruction received from other display devices, thereby improving the convenience of the master device controlling the disconnection of the power supply of the display panel and the backlight module of the slave device.

[0069] Please refer to Figure 4, which is a flowchart of a method for controlling a display device according to an embodiment of the present application. As shown in Figure 4, the method for controlling a display device may include the following steps S201 to S203.

[0070] S201, the central processing unit receives a screen off control instruction sent by the host device, and outputs a backlight power off signal to the enable terminal of the backlight power control circuit and a panel power off signal to the first control signal input terminal of the panel power control circuit according to the screen off control instruction;

[0071] The master device may be a device that can control other devices, and may include one or more devices.

[0072] The screen off control instruction can be used by the master device to control the slave device to turn off the display panel and backlight module.

[0073] The panel power off signal may be a signal for controlling the disconnection between the panel power input terminal and the panel power output terminal; the backlight power off signal may be a signal for controlling the disconnection between the backlight power input terminal and the backlight power output terminal.

[0074] When the central processing unit receives the screen off control instruction sent by the main device, it determines that the screen off signal of the screen off control instruction is the panel power off signal and the backlight power off signal, and outputs the backlight power off signal to the enable end of the backlight power control circuit, and outputs the panel power off signal to the first control signal input end of the panel power control circuit.

[0075] In this embodiment, the central processing unit outputs the backlight power off signal to the enable end of the backlight power control circuit and outputs the panel power off signal to the first control signal input end of the panel power control circuit according to the screen off control instruction sent by the main device, thereby providing support for controlling the power off of the display panel of the display device and the backlight module of the display device.

[0076] S202, the enabling terminal controls the backlight power control circuit to stop working according to the backlight power off signal, so as to disconnect the backlight power input terminal and the backlight power output terminal;

[0077] The backlight power off signal may be “BL_ON=0”, which is a low level signal.

[0078] After receiving the backlight power off signal "BL_ON=0", the enable end controls the backlight power control circuit to stop working based on the received low-level signal to disconnect the connection between the backlight power input end and the backlight power output end. As a result, the 15V power provided by the backlight module cannot be delivered to the backlight module through the backlight power control circuit.

[0079] In the embodiment of the present application, the central processing unit controls the disconnection between the backlight power input terminal and the backlight power output terminal by sending a backlight power off signal to the enable terminal of the backlight power control circuit. This stops the supply of power to the backlight module, effectively saving energy. Furthermore, by disconnecting the power supply to the backlight module when the display screen of the display device does not need to display an image, the service life of the backlight module can be extended.

[0080] S203: The first control signal input terminal controls the first switch element to be turned off according to the panel power off signal, so as to disconnect the panel power input terminal and the panel power output terminal.

[0081] The panel power off signal may be "PANEL_PW_CTRL=0".

[0082] After the first control signal input terminal of the panel power control circuit receives the panel power off signal of "PANEL_PW_CTRL=0", the first switch element disconnects the panel power input terminal and the panel power output terminal because "PANEL_PW_CTRL=0" is a low level signal.

[0083] In an embodiment of the present application, the central processing unit disconnects the panel power input terminal and the panel power output terminal by sending a panel power off signal to the first control signal input terminal of the panel power control circuit.

[0084] 4A , the first switching element is a first MOS transistor, the first control signal input terminal is connected to the gate of the first MOS transistor, the panel power input terminal is connected to the drain of the first MOS transistor, and the panel power output terminal is connected to the source of the first MOS transistor.

[0085] The first MOS tube is an NMOS tube.

[0086] The first control signal input terminal is a low-level signal according to the panel power off signal. Based on the received low-level signal, the first control signal input terminal controls the gate of the first MOS transistor to disconnect the drain of the first MOS transistor and the source of the first MOS transistor, thereby disconnecting the panel power input terminal and the panel power output terminal, thereby disconnecting the 5V power provided by the display panel power supply cannot be output from the panel power output terminal to the display panel.

[0087] In the embodiment of the present application, the first MOS tube is used to disconnect the connection between the panel power input terminal and the panel power output terminal, thereby disconnecting the connection between the display panel power supply and the display panel, so that the display panel power supply cannot power the display panel.

[0088] 4B , the first switching element includes a second MOS transistor and a third MOS transistor. The first control signal input terminal is connected to the gate of the second MOS transistor, the source of the second MOS transistor is grounded, the drain of the second MOS transistor is connected to the gate of the third MOS transistor, the panel power input terminal is connected to the source of the third MOS transistor, and the panel power output terminal is connected to the drain of the third MOS transistor.

[0089] The second MOS tube is an NMOS tube, and the third MOS tube is a PMOS tube.

[0090] The first control signal input terminal receives a panel power off signal, which is a low-level signal. Based on the received low-level signal, the first control signal input terminal controls the gate of the second MOS transistor to disconnect the drain of the second MOS transistor and the source of the second MOS transistor, and controls the gate of the third MOS transistor to disconnect the drain of the third MOS transistor and the source of the third MOS transistor, thereby disconnecting the panel power input terminal and the panel power output terminal.

[0091] In the embodiment of the present application, by combining the second MOS transistor and the third MOS transistor, the connection between the panel power input terminal and the panel power output terminal is disconnected, thereby disconnecting the connection between the display panel power supply and the display panel, so that the display panel power supply cannot power the display panel.

[0092] In an embodiment of the present application, the central processing unit outputs the backlight power off signal to the enable end of the backlight power control circuit and outputs the panel power off signal to the first control signal input end of the panel power control circuit according to the screen off control instruction sent by the main device, thereby disconnecting the power of the backlight module and the display panel.

[0093] Referring to Figure 5, which is a schematic diagram of the structure of the display device, the display device further includes a video signal conversion circuit, a signal conversion power supply, and a conversion power supply control circuit. The conversion power supply control circuit is connected to the central processing unit and the video signal conversion circuit, respectively. The signal conversion power supply is connected to the video signal conversion circuit via the conversion power supply control circuit.

[0094] The video signal conversion circuit can be used to convert the format of the video signal. For example, the video signal conversion circuit can convert the first video signal received through the eDP (Embedded Display Port) interface into a second video signal, and transmit the second video signal to the display panel through the low-voltage differential signal (LVDS) interface.

[0095] The conversion power supply control circuit may be a circuit for controlling the connection between the signal conversion power supply and the video signal conversion circuit.

[0096] 5A , the conversion power supply control circuit includes a second control signal input terminal, a second switching element, a conversion power supply input terminal, and a conversion power supply output terminal. The central processing unit is connected to the second control signal input terminal, the signal conversion power supply is connected to the conversion power supply input terminal, the video signal conversion circuit is connected to the conversion power supply output terminal, the second control signal input terminal is connected to the first terminal of the second switching element, the conversion power supply input terminal is connected to the second terminal of the second switching element, and the conversion power supply output terminal is connected to the third terminal of the second switching element.

[0097] Please refer to Figure 6, which is a flowchart of a method for controlling a display device according to an embodiment of the present application. As shown in Figure 6, the method for controlling a display device may include the following steps S301 to S302.

[0098] S301, the central processing unit outputs a screen-off signal to the second control signal input terminal of the conversion power control circuit;

[0099] The screen off control instruction can be used to control the slave device to turn off the display panel and backlight module, and can also be used by the master device to control the video signal conversion circuit to turn off.

[0100] After receiving the screen-off control instruction, the central processing unit outputs a screen-off signal to the second control signal input terminal of the conversion power control circuit.

[0101] S302: The second control signal input terminal controls the second switch element to be turned off according to the screen off signal, so as to disconnect the connection between the conversion power input terminal and the conversion power output terminal.

[0102] After the second control signal input terminal receives the screen off signal, the second switch element is controlled to be disconnected according to the screen off signal to disconnect the connection between the conversion power input terminal and the conversion power output terminal, and the 3V power output by the control signal conversion power supply cannot be output to the video signal conversion circuit through the conversion power supply control circuit.

[0103] In an embodiment of the present application, the power supply control circuit controls the disconnection between the conversion power supply input terminal and the conversion power supply output terminal based on the received screen off signal, thereby turning off the power output to the video signal conversion circuit.

[0104] Optionally, the screen-off signal output by the central processing unit to the second control signal input terminal of the conversion power control circuit is a conversion power-off signal.

[0105] The conversion power supply shutdown signal may be a signal for controlling disconnection between the conversion power supply input terminal and the conversion power supply output terminal.

[0106] For example, the power-off conversion signal may specifically be “PANEL_PW_CTRL=0”. Since “PANEL_PW_CTRL=0” is a low-level signal, the second switch element is controlled to be turned off.

[0107] In an embodiment of the present application, the conversion power shutdown signal controls the disconnection between the conversion power input terminal and the conversion power output terminal of the conversion power control circuit, thereby disconnecting the power supply from the signal conversion power supply to the video signal conversion power supply.

[0108] Optionally, referring to FIG. 5A , the second control signal input terminal controls the second switch element to be turned off according to the conversion power off signal, so as to disconnect the connection between the panel power input terminal and the panel power output terminal.

[0109] In an embodiment of the present application, based on the conversion power shutdown signal, the second switching element is controlled to be disconnected, thereby controlling the disconnection of the connection between the conversion power input terminal and the conversion power output terminal, and further disconnecting the connection between the backlight module power supply and the backlight module, so that the backlight module power supply cannot power the backlight module.

[0110] 6A , the second switching element is a fourth MOS transistor, the second control signal input terminal is connected to the gate of the fourth MOS transistor, the conversion power input terminal is connected to the drain of the fourth MOS transistor, and the conversion power output terminal is connected to the source of the fourth MOS transistor;

[0111] The second control signal input terminal controls the gate of the fourth MOS transistor to disconnect the drain and source of the fourth MOS transistor according to the conversion power shutdown signal, which is a low-level signal, so as to disconnect the conversion power input terminal and the conversion power output terminal. As a result, the 3V power provided by the signal conversion power supply cannot be output to the video signal conversion circuit through the conversion power supply control circuit.

[0112] The fourth MOS tube is an NMOS tube.

[0113] In an embodiment of the present application, the fourth MOS tube is used to disconnect the connection between the conversion power input terminal and the conversion power output terminal, thereby disconnecting the connection between the signal conversion power supply and the video signal conversion circuit, so that the signal conversion power supply cannot power the video signal conversion circuit.

[0114] 6B , the second switching element includes a fifth MOS transistor and a sixth MOS transistor. The second control signal input terminal is connected to the gate of the fifth MOS transistor, the source of the fifth MOS transistor is grounded, the drain of the fifth MOS transistor is connected to the gate of the sixth MOS transistor, the conversion power input terminal is connected to the source of the sixth MOS transistor, and the conversion power output terminal is connected to the drain of the sixth MOS transistor.

[0115] The second control signal input terminal controls the gate of the fifth MOS transistor to disconnect the drain of the fifth MOS transistor and the source of the fifth MOS transistor according to the conversion power shutdown signal, which is a low-level signal, and controls the gate of the sixth MOS transistor to disconnect the drain of the sixth MOS transistor and the source of the sixth MOS transistor, thereby disconnecting the conversion power input terminal and the conversion power output terminal.

[0116] The fifth MOS tube is an NMOS tube, and the sixth MOS tube is a PMOS tube.

[0117] In the embodiment of the present application, the fifth MOS transistor and the sixth MOS transistor are used to disconnect the connection between the conversion power input terminal and the conversion power output terminal, thereby disconnecting the connection between the signal conversion power supply and the video signal conversion circuit, so that the signal conversion power supply cannot power the video signal conversion circuit.

[0118] 7 , which is a flow chart of a method for controlling a display device according to the present invention, the method for controlling a display device as shown in FIG7 includes steps S401 to S403 .

[0119] S401, the central processing unit receives a screen-on control instruction sent by the host device, and outputs a screen-on signal to an enable terminal of a backlight power control circuit and a first control signal input terminal of a panel power control circuit respectively;

[0120] The master device may be a device capable of controlling other devices, such as a laptop, an all-in-one computer, or an interactive tablet, and may include one or more. Optionally, in the embodiment of the present application, one master device is used as an example for illustration.

[0121] The screen on control command can be used by the master device to control the slave device to turn on the display panel and backlight module.

[0122] The screen-on signal may be a control signal output by the central processing unit based on the screen-on control instruction.

[0123] Optionally, the screen-on control command sent by the master device can be triggered based on a user action. For example, there is a physical button on the master device that allows you to turn on the slave device's screen. When the master device detects that the physical button is touched or pressed, it sends the screen-on control command to the slave device.

[0124] Optionally, software for controlling the slave device may be installed on the master device. A software button for "controlling the slave device screen to turn on" is displayed on the software's running interface. When the master device detects that the user has clicked, touched, or clicked the software button, it sends a screen-on control instruction to the slave device.

[0125] After receiving the screen-on control instruction, the central processing unit of the display device determines the screen-on signal of the screen-on control instruction and sends the screen-on signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit respectively.

[0126] S402, the enabling terminal enables the backlight power control circuit according to the screen-on signal to close the connection between the backlight power input terminal and the backlight power output terminal;

[0127] After receiving the screen-on signal, the enable end controls the backlight power control circuit to power on and closes the connection between the backlight power input end and the backlight power output end. The 19V power provided by the backlight module power supply is output to the backlight module through the backlight power control circuit, where the backlight power control circuit boosts the 19V power provided by the backlight module power supply to 55V and outputs it to the backlight module.

[0128] The backlight power control circuit boosts the lower voltage 19V power supply to 55V, ensuring that the backlight module can obtain the required operating voltage for normal operation. In addition, the backlight power control circuit also acts as a voltage conversion and power supply management function, ensuring that the backlight module can obtain a stable power supply and improve display quality.

[0129] S403: The first control signal input terminal controls the first switch element to close the connection between the panel power input terminal and the panel power output terminal according to the screen-on signal.

[0130] The first control signal input terminal controls the first switch element to close based on the received screen-on signal, thereby outputting the 5V power provided by the display panel power supply to the display panel through the panel power supply control circuit, driving the display panel to operate normally.

[0131] The display screen of the display device includes a display panel and a backlight module. After receiving the screen-on control instruction, the display device calls the screen-on signal according to the screen-on control instruction to control the display panel and the backlight module to work normally after receiving power. In this way, the display device can turn on the display screen according to the screen-on control instruction.

[0132] In an embodiment of the present application, a panel power control circuit and a backlight power control circuit are used to realize that the display device controls the power connectivity of the display panel of the display device and the backlight module of the display device based on the screen start-up control instructions received from other display devices, thereby improving the convenience of the main device controlling the slave device to start the display panel and the backlight module.

[0133] Please refer to Figure 8, which is a flowchart of a method for controlling a display device according to an embodiment of the present application. As shown in Figure 8, the method for controlling a display device may include the following steps S501 to S503.

[0134] S501, the central processing unit receives a screen-on control instruction sent by the host device, and outputs a backlight power-on signal to the enable terminal of the backlight power control circuit and a panel power-on signal to the first control signal input terminal of the panel power control circuit according to the screen-on control instruction;

[0135] The master device may be a device that can control other devices, and may include one or more devices.

[0136] The screen on control command can be used by the master device to control the slave device to turn on the display panel and backlight module.

[0137] The panel power on signal may be a signal for controlling the connection between the panel power input terminal and the panel power output terminal; the backlight power on signal may be a signal for controlling the connection between the backlight power input terminal and the backlight power output terminal.

[0138] When the central processing unit receives the screen-on control instruction sent by the main device, it determines that the screen-on signal of the screen-on control instruction is a panel power-on signal and a backlight power-on signal, and outputs the backlight power-on signal to the enable end of the backlight power control circuit, and outputs the panel power-on signal to the first control signal input end of the panel power control circuit.

[0139] In this embodiment, the central processing unit outputs the backlight power on signal to the enable end of the backlight power control circuit and outputs the output panel power on signal to the first control signal input end of the panel power control circuit according to the screen on control instruction sent by the main device, thereby providing support for controlling the power supply of the display panel of the connected display device and the backlight module of the display device.

[0140] S502, the enabling terminal enables the backlight power control circuit according to the backlight power on signal to close the connection between the backlight power input terminal and the backlight power output terminal;

[0141] The backlight power-on signal may be “BL_ON=1”, which is a high-level signal.

[0142] After receiving the backlight power on signal "BL_ON=1", the enable end enables the backlight power control circuit based on the received high-level signal, that is, drives the backlight power control circuit to power on to close the connection between the backlight power input end and the backlight power output end. As a result, the 15V power provided by the backlight module power supply is boosted to 55V by the backlight power control circuit and then transmitted to the backlight module.

[0143] In an embodiment of the present application, the central processing unit starts the backlight module by sending a backlight power start signal to the enable terminal of the backlight power control circuit, and closing the connection between the backlight power input terminal and the backlight power output terminal through the enable terminal.

[0144] S503: The first control signal input terminal controls the first switch element to close the connection between the panel power input terminal and the panel power output terminal according to the panel power start signal.

[0145] The panel power on signal may be “PANEL_PW_CTRL=1”.

[0146] After the first control signal input terminal of the panel power control circuit receives the panel power on signal of "PANEL_PW_CTRL=1", since "PANEL_PW_CTRL=1" is a high level signal, the connection between the panel power input terminal and the panel power output terminal is closed through the first switch element.

[0147] In an embodiment of the present application, the central processing unit realizes the connection between the closed panel power input terminal and the panel power output terminal by sending a panel power on signal to the first control signal input terminal of the panel power control circuit.

[0148] The first switch element is a first MOS transistor, and the first MOS transistor is an NMOS transistor.

[0149] The first control signal input terminal receives a panel power on signal, which is a high-level signal. Based on the received high-level signal, the first control signal input terminal controls the gate of the first MOS transistor to close the connection between the drain and source of the first MOS transistor, thereby closing the connection between the panel power input terminal and the panel power output terminal. As a result, the 5V power provided by the display panel power supply is output from the panel power output terminal to the display panel.

[0150] In the embodiment of the present application, the connection between the closed panel power input terminal and the panel power output terminal is realized through the first MOS tube, thereby realizing the display panel power supply to the real panel.

[0151] The first switch element includes a second MOS tube and a third MOS tube, the second MOS tube is an NMOS tube, and the third MOS tube is a PMOS tube.

[0152] The first control signal input terminal receives a panel power-on signal, which is a high-level signal. Based on the received high-level signal, the first control signal input terminal controls the gate of the second MOS transistor to close the connection between the drain of the second MOS transistor and the source of the second MOS transistor, and controls the gate of the third MOS transistor to close the connection between the drain of the third MOS transistor and the source of the third MOS transistor, thereby closing the connection between the panel power input terminal and the panel power output terminal. As a result, the 5V power provided by the display panel power supply is output from the panel power output terminal to the display panel.

[0153] In the embodiment of the present application, the connection between the closed panel power input terminal and the panel power output terminal is achieved through the first MOS transistor and the second MOS transistor, thereby realizing the display panel power supply to the real panel.

[0154] Please refer to Figure 9, which is a flowchart of a method for controlling a display device according to an embodiment of the present application. As shown in Figure 9, the method for controlling a display device may include the following steps S601 to S602.

[0155] S601, the central processing unit outputs a screen-on signal to the second control signal input terminal of the conversion power control circuit;

[0156] The screen on control instruction can be used to control the slave device to turn off the display panel and backlight module, and can also be used by the master device to control the video signal conversion circuit to turn off.

[0157] After receiving the screen-on control instruction, the central processing unit outputs a screen-on signal to the second control signal input terminal of the conversion power control circuit.

[0158] S602: The second control signal input terminal controls the second switch element to close the connection between the conversion power input terminal and the conversion power output terminal according to the screen-on signal.

[0159] After the second control signal input terminal receives the screen-on signal, the second switch element is controlled to close the connection between the conversion power input terminal and the conversion power output terminal according to the screen-on signal. As a result, the 3V power output by the signal conversion power supply is output to the video signal conversion circuit through the conversion power supply control circuit.

[0160] In an embodiment of the present application, the conversion power control circuit controls the connection between the conversion power input terminal and the conversion power output terminal based on the received screen start signal, thereby providing power to the video signal conversion circuit, so that the video signal conversion circuit completes the conversion of the video signal based on the received video signal.

[0161] Optionally, the screen-on signal output by the central processing unit to the second control signal input terminal of the conversion power control circuit is a conversion power-on signal.

[0162] The conversion power on signal may be a signal for controlling the closing of the connection between the conversion power input terminal and the conversion power output terminal.

[0163] For example, the conversion power on signal may specifically be “PANEL_PW_CTRL=1”, which is a high level signal.

[0164] In the embodiment of the present application, the conversion power on signal realizes control to disconnect the connection between the conversion power input terminal and the conversion power output terminal of the conversion power control circuit.

[0165] Optionally, the second control signal input terminal controls the second switch element to close the connection between the conversion power input terminal and the conversion power output terminal according to the conversion power start signal.

[0166] In an embodiment of the present application, based on the conversion power start signal, the second switch element is controlled to close the connection between the conversion power input terminal and the conversion power output terminal, so that the signal conversion power supply supplies power to the video signal conversion circuit and starts the video signal conversion circuit.

[0167] The second control signal input terminal controls the gate of the fourth MOS transistor to close the connection between the drain and the source of the fourth MOS transistor according to the conversion power start signal, which is a high-level signal, so as to close the connection between the conversion power input terminal and the conversion power output terminal. The 3V power provided by the signal conversion power supply is output to the video signal conversion circuit through the conversion power control circuit.

[0168] The fourth MOS tube is an NMOS tube.

[0169] In the embodiment of the present application, the fourth MOS transistor closes the connection between the conversion power input terminal and the conversion power output terminal, thereby realizing the signal conversion power supply to supply power to the video signal conversion circuit and starting the video signal conversion circuit. At the same time, compared with multiple MOS transistors, one MOS transistor can reduce power consumption, save installation material loss, and simplify control.

[0170] The second control signal input terminal controls the gate of the fifth MOS transistor to close the connection between the drain of the fifth MOS transistor and the source of the fifth MOS transistor according to the conversion power start signal, which is a high-level signal, and controls the gate of the sixth MOS transistor to close the connection between the drain of the sixth MOS transistor and the source of the sixth MOS transistor, thereby closing the connection between the conversion power input terminal and the conversion power output terminal.

[0171] The fifth MOS tube is an NMOS tube, and the sixth MOS tube is a PMOS tube.

[0172] In the embodiment of the present application, the connection between the conversion power input terminal and the conversion power output terminal is closed by the fifth MOS transistor and the sixth MOS transistor. While the signal conversion power supply supplies power to the video signal conversion circuit and the video signal conversion circuit is started, the conversion power control circuit composed of two MOS transistors can share power consumption and reduce temperature rise compared to the conversion power control circuit composed of one MOS transistor.

[0173] Referring to FIG9A , in an embodiment of the present application, the panel power control circuit and the conversion power control circuit can be combined into a power control circuit. The panel power on signal and the conversion power on signal can be the same control signal. Thus, after the display device receives the screen on control command, it sends "PANEL_PW_CTRL=1" to the first and second control signal inputs of the power control circuit. Upon receiving the "PANEL_PW_CTRL=1" control signal at the first control signal input, the gate of the first MOS transistor is controlled to disconnect the drain and source of the first MOS transistor, thereby disconnecting the panel power input from the panel power output. Furthermore, upon receiving the "PANEL_PW_CTRL=1" control signal at the second control signal input, the gate of the fourth MOS transistor is controlled to disconnect the drain and source of the fourth MOS transistor, thereby disconnecting the conversion power input from the conversion power output. Thus, the display panel and the video signal conversion circuit can be simultaneously disconnected using the same control signal, further reducing energy consumption in the display device.

[0174] Referring to FIG9A , in an embodiment of the present application, the panel power control circuit and the conversion power control circuit can be combined into a power control circuit. The panel power off signal and the conversion power off signal can be the same control signal. Thus, after the display device receives the screen off control command, it sends "PANEL_PW_CTRL=0" to the first and second control signal inputs of the power control circuit. Upon receiving the "PANEL_PW_CTRL=0" control signal at the first control signal input, the gate of the first MOS transistor is controlled to disconnect the drain and source of the first MOS transistor, thereby disconnecting the panel power input from the panel power output. Furthermore, upon receiving the "PANEL_PW_CTRL=0" control signal at the second control signal input, the gate of the fourth MOS transistor is controlled to disconnect the drain and source of the fourth MOS transistor, thereby disconnecting the conversion power input from the conversion power output. Thus, the display panel and the video signal conversion circuit can be simultaneously disconnected using the same control signal, further reducing energy loss in the display device.

[0175] Similarly, when the first switching element includes the second MOS transistor and the third MOS transistor, and the second switching element includes the fifth MOS transistor and the sixth MOS transistor, the central processing unit controls the disconnection of the power supply of the display panel and the disconnection of the power supply of the video signal conversion circuit based on the receipt of the screen-on control instruction or the screen-off control instruction; or connects the power supply of the display panel and the connects the power supply of the video signal conversion circuit at the same time. The manner is similar to the above process and will not be repeated here.

[0176] Please refer to Figure 10, which is a flowchart of a method for controlling a display device according to an embodiment of the present application. As shown in Figure 10, the method for controlling a display device may include the following steps S701 to S703.

[0177] S701, receiving an audio device control instruction sent by a master device, and sending an audio control signal to a power amplifier circuit and an audio signal conversion circuit according to the audio device control instruction;

[0178] The audio device control instruction may be an instruction for controlling an audio playback device of the slave device.

[0179] The audio device control instructions sent by the master device can be triggered by user actions. For example, the master device may have physical buttons for "Control playback of all audio devices on slave devices," "Control playback of some audio devices on slave devices," or "Control all audio devices on slave devices off." When the master device detects a touch or press on any of these physical buttons, it sends the audio device control instruction corresponding to that physical button to the slave device.

[0180] The audio control signal may be a signal sent to a power amplifier circuit or a signal sent to an audio signal conversion circuit.

[0181] The master device may also be installed with software for controlling the slave devices. Software buttons for controlling the slave devices are displayed on the software's operating interface, including a "Control playback of all audio devices on the slave device," a "Control playback of some audio devices on the slave device," and a "Control shut down all audio devices on the slave device." When the master device detects that a user has triggered any of these software buttons, either through a mouse click or a touchscreen action, it sends audio device control instructions to the slave device.

[0182] After receiving the audio device control instruction, the central processor of the slave device determines the audio control signal of the audio device control instruction.

[0183] S702, the audio signal conversion circuit controls the connection status with the power amplifier circuit, the second audio playback device, and the third audio playback device according to the audio control signal;

[0184] In an embodiment of the present application, the central processing unit controls the audio signal conversion circuit to control the connection status between the audio signal conversion circuit and the power amplifier circuit, the second audio playback device, and the third audio playback device by sending an audio control signal to the audio signal conversion circuit.

[0185] S703: The power amplifier circuit controls the connection state with the first audio playback device according to the audio control signal.

[0186] The power amplifier circuit controls a connection state between itself and the first audio playback device based on the received audio control signal.

[0187] In the embodiment of the present application, the first audio playback device may be a speaker, the second audio playback device may be a wired headset, and the third audio playback device may be a wired headset.

[0188] In an embodiment of the present application, after receiving an audio device control instruction from a master device, the master device controls the playback of the first, second, and third audio playback devices by sending an audio control signal in the audio device control instruction to the power amplifier circuit and the audio signal conversion circuit. The master device can control the audio playback devices of the slave devices by simply sending the audio device control instruction, thereby improving the convenience of the master device controlling the audio playback of the slave devices.

[0189] Please refer to Figure 11, which is a flowchart of a method for controlling a display device according to an embodiment of the present application. As shown in Figure 11, the method for controlling a display device may include the following steps S801 to S803.

[0190] S801, the central processing unit receives a local device playback control instruction sent by the master device;

[0191] The local device playback control instruction can control the first audio playback device not to play the audio analog signal (which is the signal obtained after the audio signal conversion circuit converts the received audio digital signal), and control the second audio playback device and the third audio playback device to play the audio analog signal.

[0192] The local device playback control instructions sent by the master device can be triggered by user actions. For example, if the master device has a physical button for "Control playback of some audio devices of the slave device" or a software button for controlling the slave device is displayed on the software running interface, namely a "Control playback of some audio devices of the slave device" software button, and a trigger action such as a click or touch on the physical or software button is detected, the local device playback control instruction is sent to the display device.

[0193] S802, the central processing unit sends a first audio control signal to the power amplifier circuit according to the local device playback control instruction;

[0194] S803: The central processing unit sends the second audio control signal to the audio signal conversion circuit according to the local device playback control instruction.

[0195] When the central processing unit receives the local device playback control instruction, it sends the first audio control signal to the power amplifier circuit and sends the second audio control signal to the audio signal conversion circuit according to the local device playback control instruction.

[0196] The first audio control signal may be a signal for controlling the power amplifier circuit to disconnect from the first playback device; the second audio control signal may be a signal for controlling the audio signal conversion circuit to connect to the second playback device, the third playback device, and the power amplifier circuit.

[0197] For example, the first audio control signal may be “AMP_MUTE=0”, and the second audio control signal may be Codec_MUTE=1.

[0198] Specifically, the central processing unit sends a first audio control signal to the power amplifier circuit, which instructs the power amplifier circuit to disconnect the power amplifier circuit from the first audio playback device based on the received first audio control signal. The central processing unit also sends a second audio control signal to the audio signal conversion circuit, which controls the audio signal conversion circuit to connect the power amplifier circuit, the second audio playback device, and the third audio playback device.

[0199] For example, the central processing unit sends a first audio control signal "AMP_MUTE=0" to the power amplifier circuit. After receiving the first audio control signal, the power amplifier circuit disconnects the connection between the power amplifier circuit and the first audio playback device.

[0200] In addition, the central processing unit also sends a second audio control signal "Codec_MUTE=1" to the audio signal conversion circuit to control the audio signal conversion circuit to connect the power amplifier circuit, the second audio playback device and the third audio playback device.

[0201] It is understood that after the power amplifier circuit disconnects from the first audio playback device in response to the received first audio control signal, the power amplifier circuit no longer transmits the analog audio signal received from the audio signal conversion circuit to the first audio playback device. Therefore, even if the audio signal conversion circuit connects to the power amplifier circuit in response to the second audio control signal, the first audio playback device cannot receive the analog audio signal transmitted by the audio signal conversion circuit.

[0202] By calling the second audio control signal to connect the audio signal conversion circuit with the power amplifier circuit, the second audio playback device, and the third audio playback device, and by controlling the power amplifier circuit to disconnect from the first audio playback device through the first audio control signal, the connection between the audio signal conversion circuit and the second audio playback device and the third audio playback device is achieved.

[0203] In an embodiment of the present application, a second audio control signal is used to connect the audio signal conversion circuit to the second audio playback device, the third audio playback device, and the power amplifier circuit. A first audio control signal is used to disconnect the power amplifier circuit from the first audio playback device, thereby preventing the first audio playback device from receiving the analog audio signal sent from the audio signal conversion circuit to the power amplifier circuit. This prevents the first audio playback device from playing analog audio signals while the second and third audio playback devices are being controlled to play analog audio signals, thereby improving the convenience of a master device controlling a slave device's audio playback device to perform local playback.

[0204] Please refer to Figure 12, which is a flowchart of a method for controlling a display device according to an embodiment of the present application. As shown in Figure 12, the method for controlling a display device may include the following steps S901 to S903.

[0205] S901, the central processing unit receives the overall device playback control instruction sent by the main device;

[0206] The overall device playback control instruction can control the first audio playback device, the second audio playback device, and the third audio playback device to play the audio analog signal.

[0207] The overall device playback control instructions sent by the master device can be triggered based on user operations. The local device playback control instructions sent by the master device can also be triggered based on user operations. For example, there is a physical button on the master device that says "Control playback of all audio devices of the slave device" or a software button for controlling the slave device is displayed on the software running interface, namely a software button that says "Control playback of all audio devices of the slave device". When a trigger operation such as a click or touch is detected on the physical button or software button, the overall device playback control instruction is sent to the display device.

[0208] S902: The central processing unit sends a third audio control signal to the power amplifier circuit according to the overall device playback control instruction.

[0209] S903: The central processing unit sends the fourth audio control signal to the audio signal conversion circuit according to the overall device playback control instruction.

[0210] When the central processing unit receives the overall device playback control instruction, the audio control signals of the overall device playback control instruction are the third audio control signal and the fourth audio control signal.

[0211] The third audio control signal may be a signal for controlling the connection between the power amplifier circuit and the first audio playback device.

[0212] The fourth audio control signal may be a signal for controlling the connection between the audio signal conversion circuit and the power amplifier circuit, the second audio playback device, and the third audio playback device.

[0213] For example, the third audio control signal may be “AMP_MUTE=1”, and the fourth audio control signal may be Codec_MUTE=1.

[0214] After determining that the audio control signal for controlling the overall playback is the third audio control signal and the second audio control signal, the central processor sends the third audio control signal to the power amplifier circuit and sends the fourth audio control signal to the audio signal conversion circuit.

[0215] Specifically, the central processing unit sends a third audio control signal to the power amplifier circuit, which controls the power amplifier circuit to connect to the first audio playback device based on the third audio control signal. Furthermore, the central processing unit sends a second audio control signal to the audio signal conversion circuit, which controls the audio signal conversion circuit to connect to the power amplifier circuit, the second audio playback device, and the third audio playback device. As a result, the power amplifier circuit, the second audio playback device, and the third audio playback device can receive the analog audio signal converted by the audio signal conversion circuit.

[0216] It can be understood that when the power amplifier circuit is connected to the first audio playback device based on the received third audio control signal, and thus when the audio signal conversion circuit is connected to the power amplifier circuit, the second audio playback device, and the third audio playback device based on the fourth audio control signal, the power amplifier circuit can send the received audio analog signal to the first audio playback device.

[0217] By calling the fourth audio control signal to control the audio signal conversion circuit to connect to the power amplifier circuit, the second audio playback device, and the third audio playback device, and by using the third audio control signal to control the power amplifier circuit to connect to the first audio playback device, the first audio playback device, the second audio playback device and the third audio playback device are connected at the same time.

[0218] In an embodiment of the present application, the first audio playback device and the power amplifier circuit are connected via a third audio control signal, and the connection between the audio signal conversion circuit and the second audio playback device, the third audio playback device, and the power amplifier circuit is controlled via a fourth audio control signal. Simultaneously, the first audio playback device, the second audio playback device, and the third audio playback device are connected, thereby controlling the first audio playback device, the second audio playback device, and the third audio playback device to simultaneously play the received audio analog signal.

[0219] Optionally, in the embodiment of the present application, upon receiving a whole device shutdown control instruction from the master device, the central processing unit may send a fifth audio control signal to the audio signal conversion circuit.

[0220] The overall device shutdown control instruction can control the first audio playback device, the second audio playback device, and the third audio playback device to stop playing the audio analog signal.

[0221] The fifth audio control signal may be a signal for controlling the audio signal conversion circuit to disconnect from the power amplifier circuit, the second audio playback device, and the third audio playback device.

[0222] The overall device shutdown control instruction sent by the master device can be triggered based on user operations. The local device playback control instruction sent by the master device can be triggered based on user operations. For example, there is a physical button on the master device that "mute all audio devices of the slave device" or a software button for controlling the slave device is displayed on the software running interface, that is, a software button that "mute all audio devices of the slave device". When a trigger operation such as a click or touch is detected on the physical button or software button, the overall device shutdown control instruction is sent to the display device.

[0223] After receiving the audio device control instruction, the central processor of the slave device determines the audio control signal of the audio device control instruction and sends the audio control signal to the audio signal conversion circuit.

[0224] For example, after receiving the audio device control instruction, the CPU sends a fifth audio control signal "Codec_MUTE=0" to the audio signal conversion circuit to control the audio signal conversion circuit to disconnect from the power amplifier circuit, the second audio playback device, and the third audio playback device.

[0225] It is understandable that when the audio signal conversion circuit is disconnected from the power amplifier circuit, the second audio playback device, and the third audio playback device, the audio analog signal converted by the audio signal conversion circuit can no longer be sent to the power amplifier circuit, the second audio playback device, and the third audio playback device. As a result, the first audio playback device, the second audio playback device, and the third audio playback device are unable to play the audio analog signal. This allows the first audio playback device, the second audio playback device, and the third audio playback device to stop playing the audio analog signal using the received audio device control command, thereby improving the convenience of the master device controlling the overall shutdown of the slave device's audio playback device.

[0226] In an embodiment of the present application, calling the audio signal conversion circuit to disconnect the connection with the power amplifier circuit, the second audio playback device, and the third audio playback device may specifically be to turn off the output of the audio analog signals of the audio signal conversion circuit to the power amplifier circuit, the second audio playback device, and the third audio playback device; calling the audio signal conversion circuit to connect with the power amplifier circuit, the second audio playback device, and the third audio playback device may specifically be to turn on the output of the audio analog signals of the audio signal conversion circuit to the power amplifier circuit, the second audio playback device, and the third audio playback device.

[0227] Invoking the power amplifier circuit to disconnect from the first audio playback device may specifically include turning off the power amplifier circuit's output of the audio analog signal to the first audio playback device; invoking the power amplifier circuit to connect to the first audio playback device may specifically include turning on the power amplifier circuit's output of the audio analog signal to the first audio playback device.

[0228] In an embodiment of the present application, the physical button for "controlling the playback of all audio devices of the slave device", "controlling the playback of some audio devices of the slave device", and "controlling the shutdown of all audio devices of the slave device" can be the same physical button. Based on this, the master device can determine the audio device control instructions to be sent to the slave device by detecting the number of touches or presses of the physical button by the user.

[0229] Similarly, the software buttons for "controlling the playback of all audio devices of the slave device", "controlling the playback of some audio devices of the slave device", and "controlling the shutdown of all audio devices of the slave device" can be the same software button. Based on this, the master device can determine the audio device control instructions to be sent to the slave device by detecting the number of clicks or touches on the software button by the user using a mouse or other operation.

[0230] An embodiment of the present application also provides a computer storage medium, which can store multiple program instructions. The program instructions are suitable for being loaded by a processor and executing the method steps of the embodiments shown in Figures 1 to 9 above. The specific execution process can refer to the specific description of the embodiments shown in Figures 1 to 9, which will not be repeated here.

[0231] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0232] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application. Elements, but optionally also include steps or units that are not listed, or optionally also include other steps or units inherent to these processes, methods, products or devices. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0233] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory, or a random access memory.

[0234] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A method for controlling a display device, characterized in that: Applicable to a display device, the display device comprising: a central processing unit, a display panel, a display panel power supply, a backlight module, a backlight module power supply, a panel power supply control circuit, and a backlight power supply control circuit, the central processing unit being connected to the panel power supply control circuit and the backlight power supply control circuit, respectively; the display panel power supply being connected to the display panel via the panel power supply control circuit; the backlight module power supply being connected to the backlight module via the backlight power supply control circuit; and the central processing unit being in a continuously powered-on state; The backlight power control circuit includes an enable terminal, a backlight power input terminal and a backlight power output terminal, the central processing unit is connected to the enable terminal, the backlight module power supply is connected to the backlight power input terminal, and the backlight module is connected to the backlight power output terminal; The panel power control circuit includes a first control signal input terminal, a first switching element, a panel power input terminal, and a panel power output terminal, the central processing unit is connected to the first control signal input terminal, the display panel power supply is connected to the panel power input terminal, the display panel is connected to the panel power output terminal, the first control signal input terminal is connected to the first terminal of the first switching element, the panel power input terminal is connected to the second terminal of the first switching element, and the panel power output terminal is connected to the third terminal of the first switching element; The method comprises: The central processing unit receives a screen off control instruction sent by the host device, and outputs a screen off signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit respectively; The enabling end controls the backlight power control circuit to stop working according to the screen off signal, so as to disconnect the backlight power input end and the backlight power output end; The first control signal input terminal controls the first switch element to be turned off according to the screen-off signal, so as to disconnect the panel power input terminal and the panel power output terminal.

2. The method according to claim 1, characterized in that The central processor receives a screen off control instruction sent by the host device, and outputs a screen off signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit respectively, including: The central processing unit receives a screen off control instruction sent by the main device, and outputs a backlight power off signal to the enable end of the backlight power control circuit according to the screen off control instruction, and outputs a panel power off signal to the first control signal input end of the panel power control circuit.

3. The method according to claim 2, characterized in that The enabling end controls the backlight power control circuit to stop working according to the screen off signal so as to disconnect the backlight power input end and the backlight power output end, including: The enabling end controls the backlight power control circuit to stop working according to the backlight power off signal, so as to disconnect the backlight power input end and the backlight power output end.

4. The method according to claim 2, characterized in that The first control signal input terminal controls the first switch element to be turned off according to the screen off signal, so as to disconnect the panel power input terminal and the panel power output terminal, comprising: The first control signal input terminal controls the first switch element to be turned off according to the panel power off signal, so as to disconnect the panel power input terminal and the panel power output terminal.

5. The method according to claim 4, characterized in that The first switch element is a first MOS transistor, the first control signal input terminal is connected to the gate of the first MOS transistor, the panel power input terminal is connected to the drain of the first MOS transistor, and the panel power output terminal is connected to the source of the first MOS transistor; The first control signal input terminal controls the first switch element to be turned off according to the panel power off signal, so as to disconnect the panel power input terminal and the panel power output terminal, including: The first control signal input terminal controls the gate of the first MOS transistor to disconnect the drain of the first MOS transistor and the source of the first MOS transistor according to the panel power off signal, so as to disconnect the panel power input terminal and the panel power output terminal.

6. The method according to claim 4, characterized in that The first switch element includes a second MOS transistor and a third MOS transistor, the first control signal input terminal is connected to the gate of the second MOS transistor, the source of the second MOS transistor is grounded, the drain of the second MOS transistor is connected to the gate of the third MOS transistor, the panel power input terminal is connected to the source of the third MOS transistor, and the panel power output terminal is connected to the drain of the third MOS transistor; The first control signal input terminal controls the first switch element to be turned off according to the panel power off signal, so as to disconnect the panel power input terminal and the panel power output terminal, including: The first control signal input terminal controls the gate of the second MOS transistor to disconnect the drain of the second MOS transistor and the source of the second MOS transistor according to the panel power off signal, and controls the gate of the third MOS transistor to disconnect the drain of the third MOS transistor and the source of the third MOS transistor, thereby disconnecting the panel power input terminal and the panel power output terminal.

7. The method according to claim 1, characterized in that The display device further includes a video signal conversion circuit, a signal conversion power supply, and a conversion power supply control circuit, wherein the conversion power supply control circuit is connected to the central processing unit and the video signal conversion circuit respectively, and the signal conversion power supply is connected to the video signal conversion circuit via the conversion power supply control circuit; The conversion power supply control circuit includes a second control signal input terminal, a second switching element, a conversion power supply input terminal, and a conversion power supply output terminal, the central processing unit is connected to the second control signal input terminal, the signal conversion power supply is connected to the conversion power supply input terminal, the video signal conversion circuit is connected to the conversion power supply output terminal, the second control signal input terminal is connected to the first terminal of the second switching element, the conversion power supply input terminal is connected to the second terminal of the second switching element, and the conversion power supply output terminal is connected to the third terminal of the second switching element; After the central processor receives the screen off control instruction sent by the main device, the method further includes: The central processing unit outputs the screen off signal to the second control signal input terminal of the conversion power control circuit; The second control signal input terminal controls the second switch element to be turned off according to the screen-off signal, so as to disconnect the connection between the conversion power input terminal and the conversion power output terminal.

8. The method according to claim 7, characterized in that The central processing unit outputs the screen off signal to the second control signal input terminal of the conversion power control circuit, including: The central processing unit outputs a conversion power off signal to the second control signal input terminal of the conversion power control circuit.

9. The method according to claim 8, characterized in that The second control signal input terminal controls the second switch element to be turned off according to the screen off signal, so as to disconnect the connection between the conversion power input terminal and the conversion power output terminal, including: The second control signal input terminal controls the second switch element to be turned off according to the conversion power off signal. To disconnect the conversion power input terminal and the conversion power output terminal.

10. The method according to claim 9, characterized in that The second switch element is a fourth MOS transistor, the second control signal input terminal is connected to the gate of the fourth MOS transistor, the conversion power input terminal is connected to the drain of the fourth MOS transistor, and the conversion power output terminal is connected to the source of the fourth MOS transistor; The second control signal input terminal controls the second switch element to be turned off according to the conversion power shutdown signal, so as to disconnect the connection between the conversion power input terminal and the conversion power output terminal, including: The second control signal input terminal controls the gate of the fourth MOS transistor to disconnect the drain of the fourth MOS transistor and the source of the fourth MOS transistor according to the conversion power shutdown signal, so as to disconnect the connection between the conversion power input terminal and the conversion power output terminal.

11. The method according to claim 9, characterized in that The second switch element includes a fifth MOS transistor and a sixth MOS transistor, the second control signal input terminal is connected to the gate of the fifth MOS transistor, the source of the fifth MOS transistor is grounded, the drain of the fifth MOS transistor is connected to the gate of the sixth MOS transistor, the conversion power input terminal is connected to the source of the sixth MOS transistor, and the conversion power output terminal is connected to the drain of the sixth MOS transistor; The second control signal input terminal controls the second switch element to be turned off according to the conversion power shutdown signal, so as to disconnect the connection between the conversion power input terminal and the conversion power output terminal, including: The second control signal input terminal controls the gate of the fifth MOS transistor to disconnect the drain of the fifth MOS transistor and the source of the fifth MOS transistor according to the conversion power shutdown signal, and controls the gate of the sixth MOS transistor to disconnect the drain of the sixth MOS transistor and the source of the sixth MOS transistor, so as to disconnect the connection between the conversion power input terminal and the conversion power output terminal.

12. The method according to claim 1, characterized in that The method further comprises: The central processing unit receives a screen-on control instruction sent by the host device, and outputs a screen-on signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit respectively; The enabling terminal enables the backlight power control circuit according to the screen-on signal to close the connection between the backlight power input terminal and the backlight power output terminal; The first control signal input terminal controls the first switch element to close the connection between the panel power input terminal and the panel power output terminal according to the screen-on signal.

13. The method according to claim 12, characterized in that The central processing unit receives a screen-on control instruction sent by the host device, and outputs a screen-on signal to the enable terminal of the backlight power control circuit and the first control signal input terminal of the panel power control circuit, respectively, including: The central processing unit receives a screen-on control instruction sent by the main device, and outputs a backlight power-on signal to the enable end of the backlight power control circuit according to the screen-on control instruction, and outputs a panel power-on signal to the first control signal input end of the panel power control circuit.

14. The method according to claim 13, characterized in that The enabling end enables the backlight power control circuit according to the screen-on signal to close the connection between the backlight power input end and the backlight power output end, including: The enabling terminal enables the backlight power control circuit according to the backlight power start signal, so as to close the connection between the backlight power input terminal and the backlight power output terminal.

15. The method according to claim 13, characterized in that The first control signal input terminal controls the first switch element to close the connection between the panel power input terminal and the panel power output terminal according to the screen-on signal, including: The first control signal input terminal controls the first switch element to close the connection between the panel power input terminal and the panel power output terminal according to the panel power start signal.

16. The method according to claim 15, characterized in that The first switch element is a first MOS transistor, the first control signal input terminal is connected to the gate of the first MOS transistor, the panel power input terminal is connected to the drain of the first MOS transistor, and the panel power output terminal is connected to the source of the first MOS transistor; The first control signal input terminal controls the first switch element to close the connection between the panel power input terminal and the panel power output terminal according to the panel power on signal, including: The first control signal input terminal controls the gate of the first MOS transistor to close the connection between the drain of the first MOS transistor and the source of the first MOS transistor according to the panel power start signal, so as to close the connection between the panel power input terminal and the panel power output terminal.

17. The method according to claim 15, characterized in that The first switch element includes a second MOS transistor and a third MOS transistor, the first control signal input terminal is connected to the gate of the second MOS transistor, the source of the second MOS transistor is grounded, the drain of the second MOS transistor is connected to the gate of the third MOS transistor, the panel power input terminal is connected to the source of the third MOS transistor, and the panel power output terminal is connected to the drain of the third MOS transistor; The first control signal input terminal controls the first switch element to close the connection between the panel power input terminal and the panel power output terminal according to the panel power on signal, including: The first control signal input terminal controls the gate of the second MOS transistor to close the connection between the drain of the second MOS transistor and the source of the second MOS transistor according to the panel power start signal, and controls the gate of the third MOS transistor to close the connection between the drain of the third MOS transistor and the source of the third MOS transistor, thereby closing the connection between the panel power input terminal and the panel power output terminal.

18. The method according to claim 12, characterized in that The display device further includes a video signal conversion circuit, a signal conversion power supply, and a conversion power supply control circuit, wherein the conversion power supply control circuit is connected to the central processing unit and the video signal conversion circuit respectively, and the signal conversion power supply is connected to the video signal conversion circuit via the conversion power supply control circuit; The conversion power supply control circuit includes a second control signal input terminal, a second switching element, a conversion power supply input terminal, and a conversion power supply output terminal, the central processing unit is connected to the second control signal input terminal, the signal conversion power supply is connected to the conversion power supply input terminal, the video signal conversion circuit is connected to the conversion power supply output terminal, the second control signal input terminal is connected to the first terminal of the second switching element, the conversion power supply input terminal is connected to the second terminal of the second switching element, and the conversion power supply output terminal is connected to the third terminal of the second switching element; If the screen control type indicates that the screen is turned on, the method further includes: The central processing unit outputs the screen-on signal to the second control signal input terminal of the conversion power control circuit; The second control signal input terminal controls the second switch element to close the connection between the conversion power input terminal and the conversion power output terminal according to the screen-on signal.

19. The method according to claim 18, characterized in that The central processing unit outputs the screen-on signal to the second control signal input terminal of the conversion power control circuit, including: The central processing unit outputs a conversion power start signal to the second control signal input terminal of the conversion power control circuit.

20. The method according to claim 19, characterized in that The second control signal input terminal controls the second switch element to close the connection between the conversion power input terminal and the conversion power output terminal according to the screen-on signal, including: The second control signal input terminal controls the second switch element to close the connection between the conversion power input terminal and the conversion power output terminal according to the conversion power start signal.

21. The method according to claim 20, characterized in that The second switch element is a fourth MOS transistor, the second control signal input terminal is connected to the gate of the fourth MOS transistor, the conversion power input terminal is connected to the drain of the fourth MOS transistor, and the conversion power output terminal is connected to the source of the fourth MOS transistor; The second control signal input terminal controls the second switch element to close the connection between the panel power input terminal and the panel power output terminal according to the conversion power start signal, including: The second control signal input terminal controls the gate of the fourth MOS transistor to close the connection between the drain of the fourth MOS transistor and the source of the fourth MOS transistor according to the conversion power start signal, so as to close the connection between the conversion power input terminal and the conversion power output terminal.

22. The method according to claim 20, characterized in that The second switch element includes a fifth MOS transistor and a sixth MOS transistor, the second control signal input terminal is connected to the gate of the fifth MOS transistor, the source of the fifth MOS transistor is grounded, the drain of the fifth MOS transistor is connected to the gate of the sixth MOS transistor, the conversion power input terminal is connected to the source of the sixth MOS transistor, and the conversion power output terminal is connected to the drain of the sixth MOS transistor; The second control signal input terminal controls the second switch element to close the connection between the panel power input terminal and the panel power output terminal according to the conversion power start signal, including: The second control signal input terminal controls the gate of the fifth MOS transistor to close the connection between the drain of the fifth MOS transistor and the source of the fifth MOS transistor according to the conversion power start signal, so as to control the gate of the sixth MOS transistor to close the connection between the drain of the sixth MOS transistor and the source of the sixth MOS transistor, thereby closing the connection between the conversion power input terminal and the conversion power output terminal.

23. The method according to claim 1, wherein The display device further includes an audio signal conversion circuit, a power amplifier circuit, a first audio playback device, a second audio playback device, and a third audio playback device, the audio signal conversion circuit is connected to the central processing unit, the power amplifier circuit is connected to the first audio playback device and the central processing unit respectively, the audio signal conversion circuit is connected to the power amplifier circuit, the second audio playback device, and the third audio playback device respectively, and the method further includes: The central processor receives an audio device control instruction sent by the host device, and sends an audio control signal to the power amplifier circuit and the audio signal conversion circuit according to the audio device control instruction; The audio signal conversion circuit controls the connection status with the power amplifier circuit, the second audio playback device and the third audio playback device according to the audio control signal; The power amplifier circuit controls the connection state with the first audio playback device according to the audio control signal.

24. The method according to claim 23, wherein The central processor receives an audio device control instruction sent by a host device, and sends an audio control signal to the power amplifier circuit and the audio signal conversion circuit according to the audio device control instruction, including: The central processing unit receives a local device playback control instruction sent by the main device; The central processing unit sends the first audio control signal to the power amplifier circuit according to the local device playback control instruction; The central processing unit sends the second audio control signal to the audio signal conversion circuit according to the local device playback control instruction.

25. The method according to claim 24, characterized in that The audio signal conversion circuit controls the connection status with the power amplifier circuit, the second audio playback device, and the third audio playback device according to the audio control signal, including: The audio signal conversion circuit controls communication with the power amplifier circuit, the second audio playback device, and the third audio playback device according to the second audio control signal; The power amplifier circuit controls the connection state with the first audio playback device according to the audio control signal, including: The power amplifier circuit is disconnected from the first audio playback device according to the first audio control signal.

26. The method according to claim 23, wherein The central processor receives an audio device control instruction sent by a host device, and sends an audio control signal to the power amplifier circuit and the audio signal conversion circuit according to the audio device control instruction, including: The central processing unit receives the overall device playback control instruction sent by the main device; The central processing unit sends the third audio control signal to the power amplifier circuit according to the overall device playback control instruction; The central processing unit sends the fourth audio control signal to the audio signal conversion circuit according to the overall device playback control instruction.

27. The method according to claim 26, characterized in that The audio signal conversion circuit controls the connection status with the power amplifier circuit, the second audio playback device, and the third audio playback device according to the audio control signal, including: The audio signal conversion circuit controls communication with the power amplifier circuit, the second audio playback device, and the third audio playback device according to the fourth audio control signal; The power amplifier circuit controls the connection state with the first audio playback device according to the audio control signal, including: The power amplifier circuit controls the connection to the first audio playback device according to the third audio control signal.

28. The method according to claim 23, wherein The central processing unit determines an audio control signal corresponding to the audio device control type, and sends the audio control signal to the power amplifier circuit and the audio signal conversion circuit, including: The central processing unit receives an overall device shutdown control instruction sent by the main device; The central processing unit sends the fifth audio control signal to the audio signal conversion circuit according to the overall device shutdown control instruction; The audio signal conversion circuit controls the connection status with the power amplifier circuit, the second audio playback device, and the third audio playback device according to the audio control signal, including: The audio signal conversion circuit controls to disconnect the power amplifier circuit, the second audio playback device, and the third audio playback device according to the fifth audio control signal.

29. The method according to any one of claims 1 to 28, characterized in that The central processing unit includes a network connection interface, which is connected to the main device and is used to receive instructions sent by the main device.

30. A display device, comprising: A central processing unit (CPU), a display panel, a display panel power supply, a backlight module, a backlight module power supply, a panel power supply control circuit, and a backlight power supply control circuit, wherein the CPU is connected to the panel power supply control circuit and the backlight power supply control circuit, respectively; the display panel power supply is connected to the display panel via the panel power supply control circuit; the backlight module power supply is connected to the backlight module via the backlight power supply control circuit; and the CPU is in a continuously powered-on state; The backlight power control circuit includes an enable terminal, a backlight power input terminal and a backlight power output terminal, the central processing unit is connected to the enable terminal, the backlight module power supply is connected to the backlight power input terminal, and the backlight module is connected to the backlight power output terminal; The panel power control circuit includes a first control signal input terminal, a first switching element, a panel power input terminal and a panel power output terminal. The central processing unit is connected to the first control signal input terminal, the display panel power supply is connected to the panel power input terminal, the display panel is connected to the panel power output terminal, the first control signal input terminal is connected to the first terminal of the first switching element, the panel power input terminal is connected to the second terminal of the first switching element, and the panel power output terminal is connected to the third terminal of the first switching element.

31. The device according to claim 30, characterized in that The first switching element is a first MOS transistor, the first control signal input end is connected to the gate of the first MOS transistor, the panel power input end is connected to the drain of the first MOS transistor, and the panel power output end is connected to the source of the first MOS transistor.

32. The apparatus according to claim 30, wherein The first switching element includes a second MOS transistor and a third MOS transistor, the first control signal input end is connected to the gate of the second MOS transistor, the source of the second MOS transistor is grounded, the drain of the second MOS transistor is connected to the gate of the third MOS transistor, the panel power input end is connected to the source of the third MOS transistor, and the panel power output end is connected to the drain of the third MOS transistor.

33. The apparatus according to claim 30, wherein The display device further includes a video signal conversion circuit, a signal conversion power supply, and a conversion power supply control circuit, wherein the conversion power supply control circuit is connected to the central processing unit and the video signal conversion circuit respectively, and the signal conversion power supply is connected to the video signal conversion circuit via the conversion power supply control circuit; The conversion power supply control circuit includes a second control signal input terminal, a second switching element, a conversion power supply input terminal and a conversion power supply output terminal. The central processing unit is connected to the second control signal input terminal, the signal conversion power supply is connected to the conversion power supply input terminal, the video signal conversion circuit is connected to the conversion power supply output terminal, the second control signal input terminal is connected to the first terminal of the second switching element, the conversion power supply input terminal is connected to the second terminal of the second switching element, and the conversion power supply output terminal is connected to the third terminal of the second switching element.

34. The device according to claim 33, characterized in that The second switching element is a fourth MOS transistor, the second control signal input end is connected to the gate of the fourth MOS transistor, the conversion power input end is connected to the drain of the fourth MOS transistor, and the conversion power output end is connected to the source of the fourth MOS transistor.

35. The apparatus according to claim 33, wherein The second switching element includes a fifth MOS transistor and a sixth MOS transistor, the second control signal input end is connected to the gate of the fifth MOS transistor, the source of the fifth MOS transistor is grounded, the drain of the fifth MOS transistor is connected to the gate of the sixth MOS transistor, the conversion power input end is connected to the source of the sixth MOS transistor, and the conversion power output end is connected to the drain of the sixth MOS transistor.

36. The apparatus according to claim 30, wherein The display device also includes an audio signal conversion circuit, a power amplifier circuit, a first audio playback device, a second audio playback device, and a third audio playback device. The audio signal conversion circuit is connected to the central processing unit, the power amplifier circuit is connected to the first audio playback device and the central processing unit respectively, and the audio signal conversion circuit is connected to the power amplifier circuit, the second audio playback device, and the third audio playback device respectively.

37. The method according to any one of claims 30 to 36, characterized in that The central processing unit includes a network connection interface, and the network connection interface is connected to the main device.

38. A computer storage medium, characterized in that The computer storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the steps of the method according to any one of claims 1 to 29.

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