Display device and control method thereof

Abstract

The present disclosure provides a display device and a control method thereof. The display device includes a switch control circuit, a first power supply unit, a second power supply unit, a first control unit, a second control unit, a display panel driving board and a backlight module; the switch control circuit receives a start signal and sends a first start signal to the first power supply unit; the first power supply unit starts under the control of the first start signal and provides a first power supply voltage to the first control unit, the second control unit and the backlight module; the first control unit starts under the first power supply voltage and sends a power supply start signal to the first power supply unit and the switch control circuit; the first power supply unit provides a start control signal to the switch control circuit under the control of the power supply start signal; the switch control circuit sends a second start signal to the second power supply unit under the control of the power supply start signal and the start control signal; the second power supply unit starts under the control of the second start signal and provides a second power supply voltage to the display panel driving board.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display device and a control method thereof. Background Art

[0002] In a simple low-power display system, the display panel driver board (TCON) can be powered by the system motherboard (e.g., system on chip (SOC)). However, this power supply method results in low conversion efficiency of the power supply and high power consumption, and is not suitable for high-power display systems.

[0003] In heterogeneous display systems, the power consumption of the power supply is relatively large, and it can generally be powered by multiple power boards. At the same time, since the power consumption of TCON is usually relatively large, the power board can also directly power TCON. However, this power supply method causes each board to lose power at the same time when the display system loses power, and the system motherboard cannot be used to control the power supply timing of each board. In addition, due to the presence of capacitors on the backlight module and TCON, the accumulated charge of the capacitor is discharged at the moment of power failure, causing TCON to enter the self-test screen, and then an abnormal display appears on the screen (a self-test screen that should not appear appears). Summary of the invention

[0004] The present disclosure provides a display device and a control method thereof.

[0005] In a first aspect of the present disclosure, a display device is provided, including a switch control circuit, a first power supply unit, a second power supply unit, a first control unit, a second control unit, a display panel driving board, and a backlight module;

[0006] The switch control circuit is electrically coupled to the first power supply unit and the second power supply unit respectively, and is configured to: receive a start signal and send a first start signal to the first power supply unit;

[0007] The first power supply unit is electrically coupled to the first control unit, the second control unit and the backlight module respectively, and is configured to: receive the first start signal and start under the control of the first start signal, and provide a first power supply voltage to the first control unit, the second control unit and the backlight module;

[0008] The first control unit is configured to: start up at the first power supply voltage and send a power supply start signal to the first power supply unit and the switch control circuit;

[0009] The first power supply unit is further configured to: provide a start control signal to the switch control circuit under the control of the power supply start signal;

[0010] The switch control circuit is further configured to: send a second start signal to the second power supply unit under the control of the power supply start signal and the start control signal;

[0011] The second power supply unit is electrically coupled to the display panel driving board and is configured to: receive the second start-up signal and start up under the control of the second start-up signal, and provide a second power supply voltage to the display panel driving board.

[0012] In a second aspect of the present disclosure, a control method for a display device is provided, wherein the display device includes a switch control circuit, a first control unit, a second control unit, a first power supply unit, a second power supply unit, a display panel driving board, and a backlight module, and the method includes:

[0013] Using the switch control circuit to receive a start signal and send a first start signal to the first power supply unit;

[0014] The first power supply unit receives the first start signal and starts under the control of the first start signal, and provides a first power supply voltage to the first control unit, the second control unit and the backlight module;

[0015] The first control unit starts up under the first power supply voltage and sends a power supply start signal to the first power supply unit and the switch control circuit;

[0016] The first power supply unit provides a start control signal to the switch control circuit under the control of the power supply start signal;

[0017] The switch control circuit sends a second start signal to the second power supply unit under the control of the power supply start signal and the start control signal; and

[0018] The second power supply unit receives the second start-up signal and is started under the control of the second start-up signal, and provides a second power supply voltage to the display panel driving board.

[0019] In the display device and control method thereof provided by the present disclosure, the power-on time of the display panel driver board (TCON) is later than the power-on time of the first control unit, the second control unit and the backlight module, so that the user cannot see the self-test screen provided by the display panel driver board (TCON) when starting the device, thereby preventing abnormal display. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic structural diagram of an exemplary display device provided by an embodiment of the present disclosure is shown.

[0022] Figure 2 A schematic diagram of the circuit structure of an exemplary display device provided by an embodiment of the present disclosure is shown.

[0023] Figure 3 An exemplary timing diagram of some signals of a display device according to an embodiment of the present disclosure is shown.

[0024] Figure 4 A flowchart of an exemplary method provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] In a non-heterogeneous system, the number of boards in the whole machine is relatively small, the types of power supplies are relatively simple, and the power consumption is relatively low, so the main control board (for example, SOC) usually powers the TCON board. At the moment of power failure, TCON will take precedence over the system control board to cut off power. However, since this control method integrates the power supply of TCON on the system control board, although it can solve the problem of abnormal screen display, the power conversion efficiency is relatively low and it is not suitable for high-power whole machine application scenarios. In a complex heterogeneous display system, since there are many types of boards, multiple power supplies are usually required for power supply, and the power consumption of the motherboard is also relatively large, integrating the power supply of TCON on the motherboard will undoubtedly bring about problems of heat dissipation and a significant increase in power.

[0028] Based on this, the present disclosure proposes a display device and a control method thereof. The display device includes a switch control circuit, a first power supply unit, a second power supply unit, a first control unit, a second control unit, a display panel driver board and a backlight module; the switch control circuit is electrically coupled to the first power supply unit and the second power supply unit, respectively, and is configured to: receive a start signal and send a first start signal to the first power supply unit; the first power supply unit is electrically coupled to the first control unit, the second control unit and the backlight module, respectively, and is configured to: receive the first start signal and start under the control of the first start signal, and provide a first power supply voltage to the first control unit, the second control unit and the backlight module; The first control unit is configured to start under the first power supply voltage and send a power supply start signal to the first power supply unit and the switch control circuit; the first power supply unit is also configured to provide a start control signal to the switch control circuit under the control of the power supply start signal; the switch control circuit is also configured to send a second start signal to the second power supply unit under the control of the power supply start signal and the start control signal; the second power supply unit is electrically coupled to the display panel driver board, and is configured to receive the second start signal and start under the control of the second start signal, and provide a second power supply voltage to the display panel driver board.

[0029] The display device and control method thereof provided by the present disclosure have a display panel driver board (TCON) whose power-on time is later than that of the first control unit, the second control unit and the backlight module, so that the user cannot see the self-test screen provided by the display panel driver board (TCON) when the device is turned on, thereby not causing abnormal display, thereby solving the problem of abnormal screen display when the display device is powered on.

[0030] Figure 1 A schematic structural diagram of an exemplary display device 100 provided in an embodiment of the present disclosure is shown.

[0031] like Figure 1 As shown, the display device 100 may include a switch control circuit 102, a first power supply unit 104, a second power supply unit 106, a first control unit 108, a second control unit 110, a display panel driver board 112, and a backlight module 114. The switch control circuit 102 may be electrically coupled to the first power supply unit 104 and the second power supply unit 106, respectively; the first power supply unit 104 may be further electrically coupled to the first control unit 108, the second control unit 110, and the backlight module 114, respectively; and the second power supply unit 106 may be further electrically coupled to the display panel driver board (TCON) 112. In some embodiments, as Figure 1 As shown, the second power supply unit 106 may be further electrically coupled to the backlight module 114 and the second control unit 110 respectively.

[0032] Among them, the first power supply unit 104, the second power supply unit 106 and the power supply AC together constitute the power supply module of the display device 100, which is used to power the subsequent board. Optionally, the first power supply unit 104 and the second power supply unit 106 can be implemented by using the power board of an independent board. Optionally, the first power supply unit 104 can be used as the main power supply, and the second power supply unit 106 can be used as the auxiliary power supply. The first control unit 108 can be a SOC, and the second control unit 110 can be a field programmable gate array (FPGA). The first control unit 108 and the second control unit 110 constitute a dual system structure of the display device 100, wherein the FPGA performs image processing, image quality adjustment, and signal input and output; the SOC performs screen menu adjustment mode (OSD) display processing and controls some control circuits such as remote controls and buttons. In the actual working process, the power consumption of the SOC unit is relatively low, while the power consumption of the FPGA may change with information such as video display content and data processing content.

[0033] The switch control circuit 102 may receive the start signal and send a first start signal 202 to the first power supply unit 104 .

[0034] Figure 2 FIG. 1 is a schematic diagram showing a circuit structure of an exemplary display device 100 provided in an embodiment of the present disclosure. Figure 2 As shown, in some embodiments, the switch control circuit 102 may include a single-pole double-throw switch 1022. When the single-pole double-throw switch 1022 is switched to the on state ON, it can be considered that the switch control circuit 102 has received a start signal. Figure 2As shown, in some embodiments, the switch control circuit 102 may further include a first branch and a second branch. The first power supply unit 104 may be electrically coupled to the power supply AC via the first branch. The second branch may be provided with a relay 1024, and the second power supply unit 106 may be electrically coupled to the power supply AC via the relay 1024 and the first branch. Figure 2 As shown, in some embodiments, the first branch can be electrically coupled to the first power supply unit 104 and the power supply AC respectively via the ON side ON of the single-pole double-throw switch 1022. When the single-pole double-throw switch 1022 is switched to the ON state ON, the first power supply unit 104 can be connected to the power supply AC. At this time, it is considered that the first power supply unit 104 has received the first start-up signal 202, and the power supply AC can be supplied by the first power supply unit 104. Figure 2 It can be seen that the second power supply unit 106 is electrically coupled to the power supply AC via the relay 1024 and the first branch. Therefore, when the relay is in the disconnected state, even if the single-pole double-throw switch 1022 is switched to the on state ON (i.e., the first branch is connected), the second power supply unit 106 cannot be connected to the power supply AC. It can be seen that the second power supply unit 106 cannot be turned on only when the first branch is connected, so that the turn-on time of the module powered by the second power supply unit 106 will lag behind the turn-on time of the module powered by the first power supply unit 104.

[0035] The first power supply unit 104 may be started under the control of the first start signal 202 (for example, the standby part may be started first), and provide the first power supply voltage 204 to the first control unit 108 , the second control unit 110 and the backlight module 114 .

[0036] The first control unit 108 can start up at the first power supply voltage 204 and send a power supply start signal 206 to the first power supply unit 104 and the switch control circuit 102. For example, the power supply start signal 206 can be a PS-ON (POWER supply-ON) signal set to a high level. After receiving the PS-ON signal, the first power supply unit 104 is fully turned on. At this time, the first power supply unit 104 starts to supply power to the first control unit 108, the second control unit 110 and the backlight module 114 normally. In some embodiments, as Figure 2 As shown, the power-on signal 206 may be provided to a second branch of the switch control circuit 102 (the branch may be electrically coupled to the off side OFF of the single-pole double-throw switch 1022 ), and thus may be provided to the relay 1024 for turning on the relay 1024 .

[0037] The first power supply unit 104 may provide a start control signal 208 to the switch control circuit 102 under the control of the power start signal 206. For example, the start control signal 208 may be a display control signal (STB). Figure 2 As shown, the first power supply unit 104 may also feed back the start control signal 208 to the first control unit 108 .

[0038] The switch control circuit 102 may send a second start signal 210 to the second power supply unit 106 under the control of the power start signal 206 and the start control signal 208. Figure 2 As shown, the relay 1024 is connected under the control of the power supply start signal 206 and the start control signal 208, so that the power supply AC is connected to the second power supply unit 106. At this time, it is considered that the second power supply unit 106 has received the second start signal 210, and then the power supply AC can be powered by the second power supply unit 106.

[0039] The second power supply unit 106 can be started under the control of the second start signal 210, and provide the second power supply voltage 212 to the display panel driving board 112. Here, the display panel driving board 112 is directly powered by the second power supply unit 106, and does not take power from the first control unit 108 or the second control unit 110, which can appropriately reduce the amount of data that the first control unit 108 or the second control unit 110 needs to process, thereby reducing the overall power consumption of the display device 100 to a certain extent.

[0040] It can be seen that the display device 100 provided in the embodiment of the present disclosure uses the switch control circuit 102 to first control the first power supply unit 104 to be connected to the power supply AC, so that the first power supply unit 104 can first power on the first control unit 108, the second control unit 110 and the backlight module 114, and then under the joint action of the control signals provided by the first control unit 108 and the first power supply unit 104, the switch control circuit 102 controls the second power supply unit 106 to be connected to the power supply AC, so that the second power supply unit 106 supplies power to the display panel driver board (TCON) 112. Figure 3 FIG. 2 shows an exemplary timing diagram of some signals of the display device 100 according to an embodiment of the present disclosure. Figure 3 As shown, it can be seen that the secondary power supply is started later than the main power supply, so that the power-on time of the display panel driving board (TCON) 112 is later than that of other modules.

[0041] In this way, the power-on time of the display panel driver board (TCON) 112 is later than the power-on time of the first control unit 108, the second control unit 110 and the backlight module 114, so that the user cannot see the self-test screen provided by the display panel driver board (TCON) 112 when starting the computer, thereby preventing abnormal display.

[0042] In some embodiments, Figure 1 and Figure 2 As shown, the display panel driver board 112 can also be electrically coupled to the second control unit 110 and the backlight module 114, respectively, and the display panel driver board 112 can send an enable control signal 216 to the backlight module 114 in response to the handshake with the second control unit 110. The display panel driver board 112 and the second control unit 110 can use the handshake signal 214 to complete the handshake. For example, the handshake signal 214 can be a LOCK signal. In this way, the LOCK signal (handshake signal, the display data is transmitted between the FPGA and TCON only after the handshake is completed) between the FPGA and TCON is used as a logic signal for lighting the backlight module 114, that is, when the LOCK signal is detected normally, the backlight module 114 will light up, further avoiding the occurrence of abnormal display at startup.

[0043] In high brightness application scenarios, since the power consumption of the backlight module 114 is relatively high, it is sometimes difficult to be powered by a single power supply. Therefore, in some embodiments, Figure 1 and Figure 2 As shown, the second power supply unit 106 can also provide a second power supply voltage 212 for the backlight module 114 .

[0044] In a heterogeneous system, the power consumption of the second control unit 110 when using FPGA may be uncertain. Figure 1 and Figure 2 As shown, the display device 100 may further include a power switching unit 116. Figure 1 and Figure 2 As shown, the power switching unit 116 can be electrically coupled to the second control unit 110, the display panel driving board 112, the first power supply unit 104 and the second power supply unit 106, respectively, so that the first power supply unit 104 can be electrically coupled to the second control unit 110 and the display panel driving board 112 through the power switching unit 116, and similarly, the second power supply unit 106 can be electrically coupled to the second control unit 110 and the display panel driving board 112 through the power switching unit 116, respectively, so that the first power supply unit 104 and the second power supply unit 106 can both supply power to the second control unit 110 or the display panel driving board 112. In some embodiments, as Figure 2As shown, the power switching unit 116 may include a control circuit for executing the above operation steps of the power switching unit 116. In some embodiments, the control circuit may be a part of the circuit structure of the display device 100, and may be a peripheral circuit of the first control unit 108 and the second control unit 110.

[0045] After the display device 100 is in normal operation, the power switching unit 116 can determine the amount of data stored in the memory (for example, DDR) 1102 of the second control unit 110, and then determine the power consumption of the second control unit 110 based on the amount of data; in response to the power consumption of the second control unit 110 being higher than a preset power consumption threshold, the power switching unit 116 can control the second power supply unit 106 to switch from providing the second power supply voltage 212 to the display panel driver board 112 to providing the second power supply voltage 212 to the second control unit 110, and control the first power supply unit 104 to provide the first power supply voltage 204 to the display panel driver board 112.

[0046] In this way, during the operation of the heterogeneous system, the power supply is reallocated and designed through the power switching unit 116 according to the power consumption changes caused by different data amounts in the actual working state of the second control unit 110, so as to ensure the balanced power consumption of the power supply and reduce the heat dissipation of the power supply, thereby improving the stability of the system operation.

[0047] In some embodiments, the data stored in the memory 1102 of the second control unit 110 may include first high-speed transceiver data (e.g., GTX data), second high-speed transceiver data (e.g., GTH data), and low-speed transceiver data (e.g., I2C data, GPIO data, or other I / O data). At this time, the power consumption of the second control unit 110 is uncertain and is related to the channel usage of the high-speed signal. Therefore, the power switching unit 116 can determine the power consumption of the second control unit 110 according to the data volume of the first high-speed transceiver data, the second high-speed transceiver data, and the low-speed transceiver data.

[0048] In some embodiments, the preset power consumption threshold can be determined based on the sum of the power consumption of the first control unit 108 and the display panel driver board 112. For example, it can be determined based on the sum of the power consumption experience value of the first control unit 108 (e.g., 20 W) and the power consumption experience value of the display panel driver board 112 (e.g., 10 W) (e.g., the preset power consumption threshold is set to 30 W).

[0049] For example, based on the relationship between data processing and power consumption in FPGA, assuming that the processing and use of GTX data in FPGA is Q 1 , GTH data processing and usage is Q 2 , the data processing and usage of other low-speed signals are Q3 The power of FPGA is P F , we can get the basic corresponding relationship between power consumption and data usage P F =f 1 (Q 1 )+f 2 (Q 2 )+f 3 (Q 3 ). At the same time, the power usage of TCON and SOC can be estimated and set as P T and P S After the system is operating normally, the power can be compared. Assume that P F >P T +P S , then the power supply units of FPGA and TCON are exchanged, the second power supply unit 106 is used to power the FPGA, and the first power supply unit 104 is used to power the SOC and TCON; and assuming that P F ≤P T +P S , the power supply distribution state of the initial power supply is maintained, that is, the first power supply unit 104 is used to power the SOC and FPGA, and the second power supply unit 106 is used to power the TCON.

[0050] When the power is off, the display device 100 can shut down by receiving a shutdown signal from a remote control (not shown), or by a shutdown signal sent by a physical button (for example, the single-pole double-throw switch 1022 is switched to the off state OFF).

[0051] In some embodiments, the first control unit 108 can receive a shutdown signal sent by a remote control and send a power supply shutdown signal 218 to the first power supply unit 104 and the switch control circuit 106 under the control of the shutdown signal; for example, the power supply shutdown signal 218 can be a PS-ON (POWER Supply-ON) signal set to a low level.

[0052] At this time, the relay 1024 is disconnected immediately upon receiving the power-off signal 218, so that the path between the power supply AC and the second power supply unit 106 is disconnected immediately, thereby causing the display panel driving board 112 to be powered off before the first power supply unit 104. The first power supply unit 104 can be powered off under the control of the power-off signal 218, and based on the system control inside the display device 100, the first power supply unit 104 will be powered off later than the second power supply unit 106. After the first power supply unit 104 is powered off, the first control unit 108, the second control unit 110 and the backlight module 114 are all powered off, thereby completing the shutdown process.

[0053] In some embodiments, Figure 2 As shown, the switch control circuit 102 may further include an energy storage unit (eg, composed of a resistor R and a capacitor C connected in series), which may store energy under the power supply of the power supply AC after the switch control circuit 102 receives a start signal.

[0054] The switch control circuit 102 can receive a shutdown signal when the single-pole double-throw switch 1022 is switched to the closed state OFF; the relay 1024 can be disconnected immediately under the control of the shutdown signal (at this time, the second branch of the switch control circuit 102 is grounded, that is, a low-level signal), so that the path between the power supply AC and the second power supply unit 106 is immediately disconnected, thereby immediately disconnecting the display panel driver board 112. At this time, after the switch control circuit 102 receives the shutdown signal, the energy storage unit can continue to supply power to the first power supply unit 104 using the stored electric energy, that is, although the open side ON of the single-pole double-throw switch 1022 is cut off, the energy storage unit can still continue to supply power for a period of time using the electric energy stored in the capacitor C, and the first power supply unit is powered off after consuming the electric energy stored in the energy storage unit. Therefore, the display panel driver board 112 is powered off before other modules, which can avoid display abnormalities.

[0055] It can be seen that the above two power-off methods can both control the power timing of the heterogeneous system so that the display panel driver board 112 is powered off first when the power is off. Therefore, at the moment of shutdown and power off, the user will not see the abnormal screen of the TCON screen self-test, which solves the problem of abnormal screen display at the moment of power off.

[0056] In addition, compared to setting the single-pole double-throw switch 1022 outside the AC power (i.e., at the rear end of the three-phase socket), the embodiment of the present disclosure sets the single-pole double-throw switch at the control end. After the first power supply unit 104 is started, the second power supply unit 106 needs a control signal from the first power supply unit 104 to work on this basis, so that TCON can be started later. When the power is cut off, the second power supply unit 106 is cut off at the moment of the switch action, and the first power supply unit 104 is delayed by the delay circuit (the energy storage unit) than the second power supply unit 106.

[0057] According to a second aspect of the embodiments of the present disclosure, a method for controlling a display device is provided. Figure 4 FIG. 3 is a flow chart of an exemplary method 300 provided by an embodiment of the present disclosure. The method 300 may be implemented by the display device 100 and may include the following steps.

[0058] In step 302 , the display device 100 may utilize the switch control circuit 102 to receive the start signal and send the first start signal 202 to the first power supply unit 104 .

[0059] In step 304 , the first power supply unit 104 receives the first start-up signal 202 and is started under the control of the first start-up signal 202 , and provides the first power supply voltage 204 to the first control unit 108 , the second control unit 110 and the backlight module 114 .

[0060] In step 306 , the first control unit 108 starts up at the first power supply voltage 204 and sends a power-on signal 206 to the first power supply unit 104 and the switch control circuit 102 .

[0061] In step 308 , the first power supply unit 104 provides a start control signal 208 to the switch control circuit 102 under the control of the power start signal 206 .

[0062] In step 310 , the switch control circuit 102 sends a second start signal 210 to the second power supply unit 106 under the control of the power start signal 206 and the start control signal 208 .

[0063] In step 312 , the second power supply unit 106 receives the second start-up signal 210 and is started up under the control of the second start-up signal 210 , and provides the second power supply voltage 212 to the display panel driving board 112 .

[0064] In some embodiments, the display device 100 also includes a power switching unit 116, and the method 300 also includes: using the power switching unit 116 to determine the amount of data stored in the memory of the second control unit 110; using the power switching unit 116 to determine the power consumption of the second control unit 110 based on the amount of data; and in response to the power consumption of the second control unit 110 being higher than a preset power consumption threshold, using the power switching unit 116 to control the second power supply unit 106 to switch from providing the second power supply voltage 212 to the display panel driver board 112 to providing the second power supply voltage 212 to the second control unit 110, and, using the power switching unit 116 to control the first power supply unit 104 to provide the first power supply voltage 204 to the display panel driver board 112.

[0065] In some embodiments, the data stored in the memory of the second control unit 110 includes first high-speed transceiver data, second high-speed transceiver data, and low-speed transceiver data, and the method 300 further includes:

[0066] The power switching unit 116 is used to determine the power consumption of the second control unit 110 according to the data amounts of the first high-speed transceiver data, the second high-speed transceiver data, and the low-speed transceiver data.

[0067] In some embodiments, the method 300 further includes: using a second power supply unit to provide a second power supply voltage 212 to the backlight module 114 .

[0068] In some embodiments, the method 300 also includes: the first control unit 108 receives a shutdown signal and sends a power shutdown signal 218 to the first power supply unit 104 and the switch control circuit 102; the switch control circuit 102 disconnects the power supply AC from the second power supply unit 106 under the control of the power shutdown signal 218, thereby causing the display panel driver board 112 to be powered off before the first power supply unit 104; and the first power supply unit 104 is powered off under the control of the power shutdown signal 218.

[0069] In some embodiments, the switch control circuit 102 further includes an energy storage unit, and the method 300 further includes: after the switch control circuit 102 receives the start signal, the energy storage unit stores energy under the power supply of the power supply AC.

[0070] In some embodiments, the method 300 also includes: in response to the single-pole double-throw switch 1022 being switched to the off state OFF, the switch control circuit 102 receives a shutdown signal and disconnects the power supply AC from the second power supply unit 106 under the control of the shutdown signal, thereby cutting off power to the display panel driver board 112; after the switch control circuit 102 receives the shutdown signal, the energy storage unit uses the stored energy to power the first power supply unit 104; and the first power supply unit 104 is powered off after the energy stored in the energy storage unit is consumed.

[0071] The display device 100 of the aforementioned embodiment is used to implement the corresponding method 300 in any of the aforementioned embodiments. The method 300 has the beneficial effects of the corresponding embodiment of the display device 100 and will not be described in detail herein.

[0072] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0073] In addition, for simplicity of explanation and discussion, and in order not to make the embodiments of the present disclosure difficult to understand, well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Further, the devices may be shown in block diagram form in order to avoid making the embodiments of the present disclosure difficult to understand, and this also takes into account the fact that details of the implementation of these block diagram devices are highly dependent on the platform on which the embodiments of the present disclosure are to be implemented (i.e., these details should be fully within the understanding of those skilled in the art). In cases where specific details (e.g., circuits) are set forth to describe exemplary embodiments of the present disclosure, it will be apparent to those skilled in the art that the embodiments of the present disclosure may be practiced without these specific details or with variations of these specific details. Accordingly, these descriptions should be considered illustrative rather than restrictive.

[0074] Although the present disclosure has been described in connection with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0075] Embodiments of the present disclosure are intended to cover all such alternatives, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the embodiments of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A display device, comprising a switch control circuit, a first power supply unit, a second power supply unit, a first control unit, a second control unit, a display panel driving board and a backlight module; The switch control circuit is electrically coupled to the first power supply unit and the second power supply unit respectively, and is configured to: receive a start signal and send a first start signal to the first power supply unit; The first power supply unit is electrically coupled to the first control unit, the second control unit and the backlight module respectively, and is configured to: receive the first start signal and start under the control of the first start signal, and provide a first power supply voltage to the first control unit, the second control unit and the backlight module; The first control unit is configured to: start up at the first power supply voltage and send a power supply start signal to the first power supply unit and the switch control circuit; The first power supply unit is further configured to: provide a start control signal to the switch control circuit under the control of the power supply start signal; The switch control circuit is further configured to: send a second start signal to the second power supply unit under the control of the power supply start signal and the start control signal; The second power supply unit is electrically coupled to the display panel driving board and is configured to: receive the second start signal and start under the control of the second start signal, and provide a second power supply voltage to the display panel driving board; The display device further includes a power supply; in, The switch control circuit includes a first branch and a second branch, the first power supply unit is electrically coupled to the power supply via the first branch, the second branch is provided with a relay, the second power supply unit is electrically coupled to the power supply via the relay and the first branch, and the relay is connected under the control of the power supply start signal and the start control signal to connect the power supply to the second power supply unit.

2. The display device according to claim 1, in, The switch control circuit further comprises a single-pole double-throw switch, and the switch control circuit is configured to: receive the start signal in response to the single-pole double-throw switch being switched to an on state; The first branch is electrically coupled to the first power supply unit and the power supply via the single-pole double-throw switch, and in response to the single-pole double-throw switch being switched to an on state, the first power supply unit is connected to the power supply.

3. The display device according to claim 1, in, The second power supply unit is also electrically coupled to the second control unit. The display device further includes a power switching unit, which is electrically coupled to the second control unit, the display panel driving board, the first power supply unit and the second power supply unit, respectively, and is configured as follows: determining an amount of data stored in a memory of the second control unit; determining the power consumption of the second control unit according to the amount of data; In response to the power consumption of the second control unit being higher than a preset power consumption threshold, the second power supply unit is controlled to switch from providing the second power supply voltage to the display panel driver board to providing the second power supply voltage to the second control unit, and the first power supply unit is controlled to provide the first power supply voltage to the display panel driver board.

4. The display device according to claim 3, in, The data stored in the memory of the second control unit includes first high-speed transceiver data, second high-speed transceiver data and low-speed transceiver data, and the power switching unit is configured to determine the power consumption of the second control unit according to the data volume of the first high-speed transceiver data, the second high-speed transceiver data and the low-speed transceiver data.

5. The display device according to claim 1, in, The second power supply unit is also electrically coupled to the backlight module, and is configured to provide the second power supply voltage to the backlight module.

6. The display device according to claim 1, in, The display panel driving board is also electrically coupled to the second control unit and the backlight module respectively, and is configured to send an enable control signal to the backlight module in response to completion of the handshake with the second control unit.

7. The display device according to claim 1, in, The first control unit is further configured to: receive a shutdown signal and send a power supply shutdown signal to the first power supply unit and the switch control circuit; The relay is configured to be disconnected under the control of the power supply shutdown signal, so that the power supply is disconnected from the second power supply unit, thereby causing the display panel driving board to be powered off before the first power supply unit; The first power supply unit is configured to cut off power under the control of the power supply shutdown signal.

8. The display device according to claim 2, in, The switch control circuit also includes an energy storage unit, and is configured to: store energy under the power supply of the power supply after the switch control circuit receives the start signal; the switch control circuit is also configured to: receive a shutdown signal in response to the single-pole double-throw switch being switched to a closed state; The relay is configured to: disconnect under the control of the shutdown signal, so that the power supply is disconnected from the second power supply unit, thereby powering off the display panel driving board; The energy storage unit is further configured to: after the switch control circuit receives the shutdown signal, use the stored electric energy to supply power to the first power supply unit; The first power supply unit is further configured to cut off power after the electric energy stored in the energy storage unit is consumed.

9. A method for controlling a display device, in, The display device includes a switch control circuit, a first control unit, a second control unit, a first power supply unit, a second power supply unit, a display panel driving board and a backlight module, and the method includes: Using the switch control circuit to receive a start signal and send a first start signal to the first power supply unit; The first power supply unit receives the first start signal and starts under the control of the first start signal, and provides a first power supply voltage to the first control unit, the second control unit and the backlight module; The first control unit starts up under the first power supply voltage and sends a power supply start signal to the first power supply unit and the switch control circuit; The first power supply unit provides a start control signal to the switch control circuit under the control of the power supply start signal; The switch control circuit sends a second start signal to the second power supply unit under the control of the power supply start signal and the start control signal; and The second power supply unit receives the second start signal and starts up under the control of the second start signal, and provides a second power supply voltage to the display panel driving board; The display device also includes a power supply; wherein the switch control circuit includes a first branch and a second branch, the first power supply unit is electrically coupled to the power supply via the first branch, the second branch is provided with a relay, the second power supply unit is electrically coupled to the power supply via the relay and the first branch, and the relay is connected under the control of the power supply start signal and the start control signal to connect the power supply to the second power supply unit.

10. The method according to claim 9, in, The display device further includes a power switching unit, and the method further includes: determining, using the power switching unit, an amount of data stored in a memory of the second control unit; determining the power consumption of the second control unit according to the amount of data using the power switching unit; and In response to the power consumption of the second control unit being higher than a preset power consumption threshold, the power switching unit is used to control the second power supply unit to switch from providing a second power supply voltage to the display panel driver board to providing a second power supply voltage to the second control unit, and the power switching unit is used to control the first power supply unit to provide a first power supply voltage to the display panel driver board.

11. The method according to claim 9, in, The method further comprises: The first control unit receives a shutdown signal and sends a power supply shutdown signal to the first power supply unit and the switch control circuit; The switch control circuit disconnects the power supply from the second power supply unit under the control of the power supply shutdown signal, thereby disconnecting the display panel driving board before the first power supply unit is powered off; and The first power supply unit is powered off under the control of the power-off signal.

12. The method according to claim 9, in, The switch control circuit further includes a single-pole double-throw switch and an energy storage unit, and the method further includes: After the switch control circuit receives the start signal, the energy storage unit stores energy under the power supply of the power supply; In response to the single-pole double-throw switch being switched to an off state, the switch control circuit receives a shutdown signal; The switch control circuit disconnects the power supply from the second power supply unit under the control of the shutdown signal, thereby powering off the display panel drive board; The energy storage unit supplies power to the first power supply unit using stored energy after the switch control circuit receives the shutdown signal; and The first power supply unit is powered off after consuming the energy stored in the energy storage unit.

Images