Display device

Abstract

The embodiment of the utility model provides a display device which comprises a display panel, a controller and a backlight assembly, the backlight assembly comprises at least one power supply control circuit, a light emitting unit group and at least one driving chip, an input port of the power supply control circuit is electrically connected with the controller, and a first output end of the power supply control circuit is electrically connected with a power supply end of the corresponding at least one driving chip. The second output end of the power supply control circuit is coupled with the data input end of at least one driving chip, and the power supply control circuit obtains driving data, outputs a chip power supply signal to the corresponding driving chip and outputs the driving data to the driving chip when the display equipment is not in a standby state; and when the display device is in a standby state, the driving chip does not obtain the driving data and stops providing the power supply signal to the driving chip, so that the driving chip reduces the leakage current and the loss in the standby process of the display device, and the display efficiency is improved. And normal image display when the display equipment is not in a standby state is not influenced.

Description

[0001] This application claims priority to Chinese Patent Application No. 202310280055.1, filed on March 21, 2023, entitled "Driver Chip, Driver Circuit and Display Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to display technology. More specifically, it relates to a display device. Background Technology

[0003] A display device is a device that displays images and / or a user interface. A display device includes a power supply circuit, a motherboard, and a backlight assembly. The backlight assembly includes a driver circuit and a lamp board. The power supply circuit provides power signals to both the motherboard and the backlight assembly via a stepped power supply.

[0004] When a display device is in standby mode, the backlight assembly generates leakage current based on the power signal, resulting in power loss. Therefore, how to reduce the power loss generated by the backlight assembly during the standby process of a display device has become a key research focus. Utility Model Content

[0005] This application provides a display device that aims to solve the technical problem of high power loss generated by the backlight component during standby.

[0006] This application provides a display device, the display device comprising:

[0007] Display panel;

[0008] The controller, which is electrically connected to the display panel, is configured to output drive data;

[0009] The backlight assembly includes: at least one power supply control circuit, a driver circuit, and a lamp board;

[0010] The lamp panel includes an array of lamp beads, and at least one lamp bead is electrically connected to form a light-emitting unit group;

[0011] The driving circuit includes at least one driving chip;

[0012] The input port of the power supply control circuit is electrically connected to the controller, its first output terminal is electrically connected to the power supply terminal of at least one corresponding driver chip, and its second output terminal is coupled to the data input terminal of the at least one driver chip.

[0013] The power supply control circuit is configured to output a chip power supply signal from its first output terminal and output the drive data from its second output terminal when receiving the drive data.

[0014] The power supply control circuit is also configured to stop outputting the chip power supply signal and the drive data when it does not receive the drive data.

[0015] The driving chip is electrically connected to at least one light-emitting unit group and is configured to drive the light-emitting unit group to emit light based on the driving data and the chip power supply signal.

[0016] In the above technical solution, the backlight assembly of the display device is provided with at least one power supply control circuit, at least one driver chip, and multiple light-emitting unit groups. When the display device is not in standby mode, the at least one power supply control circuit obtains driving data from the controller electrically connected to its input terminal, outputs a chip power supply signal to the corresponding driver chip from its first output terminal, and outputs driving data to the driver chip from its second output terminal, so that the driver chip drives the corresponding light-emitting unit group to emit light based on the driving data and the chip power supply signal. When the display device is in standby mode, it does not obtain driving data and stops providing power supply signals to the driver chip, so that the driver chip reduces leakage current and reduces losses during the standby process of the display device, and does not affect the normal display of images when the display device is not in standby mode.

[0017] In some embodiments, the power supply control circuit includes:

[0018] The control unit, whose input terminal is coupled to the input port of the power supply control circuit, is configured to obtain the drive data from its input terminal, output a first control signal from its first output terminal, and output a second control signal from its second output terminal;

[0019] A DC-DC voltage conversion unit has its input terminal coupled to the input port of the power supply control circuit, its output terminal electrically connected to the first output terminal of the power supply control circuit, and its control terminal electrically connected to the first output terminal of the control unit. It is configured to obtain a first power supply signal from its input terminal and, when it obtains the first control signal at its control terminal, output the chip power supply signal.

[0020] The DC-DC voltage conversion unit is also configured to not output the chip power supply signal when it does not receive the first control signal at its control terminal;

[0021] A drive data transmission unit has its input terminal coupled to the input port of the power supply control circuit, its output terminal electrically connected to the second output terminal of the power supply control circuit, and its control terminal electrically connected to the second output terminal of the control unit. It is configured to obtain drive data from its input terminal and output the drive data when it obtains the second control signal at its control terminal.

[0022] The drive data transmission unit is also configured to stop outputting the drive data when it does not receive the second control signal at its control terminal.

[0023] In some embodiments, the controller is further configured to output a second power signal that loads drive data;

[0024] The backlight assembly further includes a demodulation unit, whose input terminal is coupled to the controller, whose first output terminal is electrically connected to the input terminal of the control unit and the input terminal of the drive data transmission unit, and whose second output terminal is electrically connected to the input terminal of the DC voltage conversion unit. It is configured to obtain a second power signal for loading drive data, output the drive data from its first output terminal, and output the second power signal from its second output terminal as the first power supply signal.

[0025] In some embodiments, the power supply control circuit includes the demodulation unit;

[0026] The input port of the power supply control circuit includes an input terminal, which is configured to obtain a second power signal from the input terminal to load the drive data;

[0027] The input terminal of the demodulation unit is electrically connected to the input terminal of the power supply control circuit.

[0028] In some embodiments, the display device further includes: a power supply circuit;

[0029] The input port of the power supply control circuit is electrically connected to the power supply circuit and is configured to obtain the first power supply signal from the input port;

[0030] The power supply terminal of the lamp board is electrically connected to the power supply circuit.

[0031] In some embodiments, the input port of the power supply control circuit includes an input terminal and a power supply terminal;

[0032] The input terminal of the power supply control circuit is electrically connected to the controller and is configured to obtain the drive data from the input terminal;

[0033] The power supply control circuit is electrically connected to the power supply circuit and is configured to obtain the first power supply signal from the power supply terminal.

[0034] In some embodiments, the input terminal of the power supply control circuit is electrically connected to the input terminal of the control unit and the input terminal of the drive data transmission unit;

[0035] The power supply control circuit is electrically connected to the input terminal of the DC voltage conversion unit.

[0036] In some embodiments, the power supply terminal of the power supply control circuit and the power supply terminal of the lamp board are electrically connected.

[0037] In some embodiments, the drive data transmission unit includes a controllable switching device or a buffer amplifier.

[0038] In some embodiments, the DC-DC voltage conversion unit includes:

[0039] The controllable switching device has its first terminal electrically connected to the first terminal of the DC-DC voltage conversion unit, and its control terminal electrically connected to the control terminal of the DC-DC voltage conversion unit.

[0040] The DC-DC converter circuit has its input terminal electrically connected to the second terminal of the controllable switching device, and its output terminal electrically connected to the output terminal of the DC-DC voltage conversion unit.

[0041] The display device provided in this application includes a display panel, a controller electrically connected to the display panel, and a backlight assembly. The backlight assembly includes at least one power supply control circuit, a driving circuit, and a lamp board. The lamp board includes an array of LEDs, and at least one LED is electrically connected to form a light-emitting unit group. The driving circuit includes at least one driving chip. The input port of the power supply control circuit is electrically connected to the controller, its first output terminal is electrically connected to the power supply terminal of the corresponding at least one driving chip, and its second output terminal is coupled to the data input terminal of the at least one driving chip. When the display device is not in standby mode, the power supply control circuit obtains driving data from its input terminal, outputs a chip power supply signal to the corresponding driving chip from its first output terminal, and outputs driving data to the driving chip from its second output terminal, so that the driving chip drives the corresponding light-emitting unit group to emit light based on the driving data and the chip power supply signal. When the display device is in standby mode, it does not obtain driving data and stops providing a power supply signal to the driving chip, so that the driving chip reduces leakage current and reduces losses during the standby process of the display device, and does not affect the normal display of images when the display device is not in standby mode. Attached Figure Description

[0042] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0043] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to some embodiments;

[0044] Figure 2 This is a schematic diagram of the structure of a display device according to some embodiments;

[0045] Figure 3 This is a schematic diagram of the structure of a display device according to some other embodiments;

[0046] Figure 4A schematic diagram of the circuit structure of a power supply according to some embodiments;

[0047] Figure 5 This is a schematic diagram of the structure of a backlight assembly according to some embodiments;

[0048] Figure 6A This is a schematic diagram of the structure of a backlight assembly according to some embodiments;

[0049] Figure 6B This is a schematic diagram of the structure of a backlight assembly according to some other embodiments;

[0050] Figure 6C This is a schematic diagram of the structure of a backlight assembly according to some other embodiments;

[0051] Figure 6D This is a schematic diagram of the structure of a backlight assembly according to some other embodiments;

[0052] Figure 7 This is a display control method according to some embodiments;

[0053] Figure 8 This is a schematic diagram of the power supply control circuit according to some embodiments;

[0054] Figure 9A This is a schematic diagram of the power supply control circuit according to some other embodiments;

[0055] Figure 9B This is a schematic diagram of the power supply control circuit according to some other embodiments;

[0056] Figure 10 This is a schematic diagram of the power supply control circuit according to some other embodiments;

[0057] Figure 11 This is a waveform diagram of the drive data according to some embodiments;

[0058] Figure 12 This is a schematic diagram of the structure of a display device according to some other embodiments;

[0059] Figure 13 This is a schematic diagram of the structure of a display control device according to some embodiments. Detailed Implementation

[0060] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0061] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0062] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0063] The display device provided in this application can have various implementation forms, such as a smart TV, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 and Figure 2 This is one specific embodiment of the display device of this application.

[0064] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to some embodiments. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100.

[0065] In some embodiments, the control device 100 may be a remote control. Communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, and other short-range communication methods, controlling the display device 200 wirelessly or via wired means. Users can control the display device 200 by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0066] In some embodiments, a smart device 300 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) may also be used to control the display device 200. For example, an application running on the smart device may be used to control the display device 200.

[0067] In some embodiments, the display device may receive instructions not through the aforementioned smart devices or control devices, but through touch or gestures.

[0068] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the smart device 300. For example, it can be controlled by directly receiving the user's voice commands through a module configured inside the display device 200 for acquiring voice commands, or it can be controlled by receiving the user's voice commands through a voice control device set outside the display device 200.

[0069] In some embodiments, the display device 200 also communicates with the server 400. The display device 200 may be communicatively coupled via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 may provide various content and interactive features to the display device 200. The server 400 may be a cluster or multiple clusters, and may include one or more types of servers.

[0070] Figure 2 This is a schematic diagram of the structure of a display device 200 according to some embodiments.

[0071] In some embodiments, the display device 200 includes a controller 250, which is configured to receive a video input signal or an image input signal, obtain backlight data and display data from the video input signal or the image input signal, and perform format conversion, timing control and other processing on the backlight data and display data before outputting them.

[0072] In some embodiments, the controller 250 may include a system-on-chip (SOC) controller configured to obtain video input signals or image input signals (hereinafter referred to as input signals) from an external input port or a network port, and perform operations such as format conversion, data processing, and image rendering on the input signals.

[0073] In some embodiments, controller 250 may include a timing controller (Tcon) configured to perform timing control output on the data it acquires.

[0074] In some embodiments, the timing controller is also configured to perform data format conversion.

[0075] In some embodiments, controller 250 may include a backlight controller (Bcon) or a dimming controller (DCON), configured to obtain processing data associated with backlight data, generate and output driving data from the processing data.

[0076] In some embodiments, the display device 200 includes a display panel 10 coupled to a controller 250, the display panel 10 including liquid crystal molecules configured to deflect based on received processed display data.

[0077] In some embodiments, the display device 200 includes a backlight assembly 20, the backlight assembly 20 and a controller 250 are coupled, and the backlight assembly 20 is configured to emit light based on driving data. The display panel 10 can display an image based on the backlight provided by the backlight assembly 20.

[0078] In some embodiments, the backlight assembly 20 includes a driving circuit 201 coupled to a controller 250. The driving circuit 201 includes a plurality of driving chips 202 configured to generate driving data based on driving data.

[0079] In some embodiments, the backlight assembly 20 further includes a lamp board 30, which includes an array of lamp beads 301. At least one lamp bead is electrically connected to form a light-emitting unit group. The light-emitting unit group is electrically connected to a driving end of the driving chip 202 and is configured to emit light based on driving data.

[0080] In some embodiments, in the light-emitting unit group, at least one LED bead is connected in series to form a light string;

[0081] In other embodiments, at least one LED chip is connected in parallel in the light-emitting unit group;

[0082] In other embodiments, in the light-emitting unit group, at least one LED bead is connected in series to form a light string, and at least one light string is connected in parallel.

[0083] Among them, the light string is a light string composed of light beads connected from left to right or from right to left, or it can be a light string composed from top to bottom or bottom to top, or it can be a light string composed of light beads connected in a preset order (e.g., rotation, bending, etc.).

[0084] The LEDs can be composed of MiniLED, MicroLED, WLED, RGB-LED, GB-rLED or QLED (quantum dot).

[0085] In one embodiment, the display device 200 includes a power supply circuit 13, which is coupled to a controller 250, a backlight assembly, and a display panel 10. The power supply circuit 13 is configured to provide corresponding power signals to the controller 250, the display panel 10, and / or the backlight assembly 20.

[0086] In some embodiments, the power supply terminals of the power supply circuit 13 and each light-emitting unit group in the backlight assembly 20 are coupled and configured to provide a backlight power supply signal VLED so that the light-emitting unit group emits light when it receives the backlight power supply signal VLED and the driving data provided by the driver chip 202.

[0087] In some embodiments, the driver chip 202 samples the supply voltage of the light-emitting unit group to determine the supply state of the light-emitting unit group, which includes an undervoltage state or an overvoltage state. The supply state is fed back to the controller 250, so that the controller 250 provides a final feedback signal to the power supply circuit 13 based on the feedback signal. The power supply circuit 13 adjusts the supply voltage based on the final feedback signal.

[0088] In some embodiments, the driver chip 202 transmits feedback signals through the wires between its data output terminal Dout and the controller 250.

[0089] In other embodiments, the driver chip 202 uses its drive data transmission lines to transmit the feedback signal in reverse to the controller 250.

[0090] A schematic diagram of the physical structure of the backlight assembly 20 and the display panel 10 is shown below. Figure 3 As shown, the display panel 10 is positioned above the backlight assembly, and the display panel 10 can display an image on its upper side.

[0091] In some embodiments, the backlight assembly 20 includes a backplate 407 configured to provide a supporting substrate.

[0092] In some embodiments, the backlight assembly 20 includes a lamp panel 30 on which LEDs are disposed and configured to provide backlight.

[0093] In some embodiments, the backlight assembly 20 includes a reflective sheet 404 configured to reflect the backlight of the lamp plate toward the diffuser plate direction;

[0094] In some embodiments, the backlight assembly 20 includes: a bracket 403 configured to support a diffuser plate 402, a diaphragm 401, etc., to maintain the optical spacing between the lamp plate and the diffuser plate;

[0095] In some embodiments, the backlight assembly 20 includes: a diaphragm 401;

[0096] In some embodiments, the backlight assembly 20 includes: a diffuser plate 402;

[0097] The diaphragm 401 and diffuser plate 402 are configured to improve the reflection efficiency of the backlight generated by the backlight assembly, guide light uniformly, increase brightness and color saturation, and adjust the light so that the brightness distribution of the entire display panel is more uniform.

[0098] In some embodiments, the arrangement order of the components in the backlight assembly 20 from top to bottom is as follows: diaphragm 401, diffuser plate 402, bracket 403, reflector 404, lamp plate 30, and back plate 407.

[0099] In other embodiments, the backlight assembly 20 further includes a honeycomb panel 405 and a vibrator 406, which are disposed between the lamp panel 30 and the back panel 407 and are configured to cause the backlight assembly 20 and the display panel 10 to vibrate and produce sound based on sound signals.

[0100] In some embodiments, taking a micro LED display device as an example, the backlight assembly 20 is provided with multiple lamp boards 30. After the multiple lamp boards 30 are spliced ​​together, they emit light together to provide backlight to the display panel 10. Each lamp board 30 includes multiple light-emitting areas, and each light-emitting area (also called a partition) includes multiple micro LED beads. The micro LED beads are micron-level beads such as miniLED and microLED.

[0101] The lamp board 30 is electrically connected to the driving circuit, which includes one or more driving chips. Each driving chip in each zone receives the processed backlight data sent by Bcon or Dcon, and drives the corresponding LED to emit light based on the processed backlight data, thereby realizing local backlight control of the backlight component, i.e., realizing local dimming. This enables more precise regional light control and makes the screen brightness more uniform and harmonious.

[0102] Figure 4 This is a schematic diagram of the circuit structure of a power supply according to some embodiments.

[0103] In some embodiments, the power supply circuit 13 includes a filter and rectifier circuit 131, which is configured to acquire mains power, filter the mains power, rectify the voltage, and output a DC signal.

[0104] In some embodiments, the power supply circuit 13 includes a power factor correction (PFC) circuit 132, which is configured to compensate and correct the DC signal based on the power generated by the current load, so as to improve the utilization rate of electrical energy. The output electrical signal is the corrected electrical signal.

[0105] In some embodiments, the power supply circuit 13 includes an LLC isolated voltage conversion circuit 133, which is configured to convert the power factor corrected correction signal into a voltage and output the voltage value required for the normal operation of the motherboard 80 and the audio and backlight components.

[0106] In some embodiments, the motherboard 80 includes at least one of a tuner, a communicator, a detector, an external device interface, a controller, an audio output interface, a memory, and a user interface.

[0107] In some embodiments, the LLC isolation voltage conversion circuit 133 includes at least two LLC circuits.

[0108] Taking the LLC isolation voltage conversion circuit 133, which includes two LLC circuits, as an example, its power supply process will be explained.

[0109] The LLC isolation voltage conversion circuit 133 includes a first LLC circuit and a second LLC circuit. The first LLC circuit is a circuit that supplies power to the motherboard 80 and the audio circuit, and the second LLC circuit is a circuit that supplies power to the backlight assembly 20. The first LLC circuit generates a 12V or 16V / 24V electrical signal based on the output electrical signal of the power factor correction circuit 132, and the second LLC circuit generates a 10V to 15V electrical signal based on the output electrical signal of the power factor correction circuit 132.

[0110] The two LLC circuits mentioned above are dimmed separately. When the display device is in standby mode, the second LLC circuit can be controlled not to provide an electrical signal, so that the backlight component will not suffer losses due to leakage current during standby.

[0111] However, with the increasing complexity of local dimming functions, in order to improve the response speed of the front-end power supply to the current and voltage of the backlight and reduce power supply costs, related technologies employ stepped power supply. This means that the high-voltage side circuit of the LLC isolation voltage converter circuit 133 corresponds to at least two low-voltage side circuits. Through transformer voltage conversion, different voltages are obtained on the low-voltage side, thus providing electrical signals with different voltage values ​​at the output. Its circuit structure is as follows: Figure 4 The LLC isolated voltage converter circuit 133 is shown.

[0112] exist Figure 4 In the circuit structure shown, an LLC isolated voltage conversion circuit 133 is configured with a high-voltage side circuit and multiple low-voltage side circuits. The multiple low-voltage side circuits obtain power from the high-voltage side circuit through a transformer. When a power supply signal is obtained at the input terminal of the high-voltage side circuit, the corresponding voltage value can be provided to the motherboard 80, the audio and backlight components 20 at the same time.

[0113] In some embodiments, the backlight assembly 20 includes a driving circuit and a lamp board, and the LLC isolated voltage conversion circuit 133 is configured to provide a power signal VLED to the driving circuit and a power signal VCC to the lamp board.

[0114] Due to differences in components and circuit structures within the driver circuit and the lamp board, the voltage values ​​of the power supply signals used in the driver circuit and the lamp board differ. Generally, the two low-voltage side circuits in the LLC isolation voltage converter circuit 133 are required to provide the power supply signal.

[0115] In some embodiments, to simplify the circuit structure, a low-dropout regulator (LDO) can be added to the backlight assembly 20, and its circuit connection relationship in the backlight assembly 20 is as follows: Figure 5As shown.

[0116] exist Figure 5 In the backlight assembly shown, the input terminal of the low-dropout linear regulator 40 is electrically connected to the output terminal of the power supply circuit 13, and the output terminal is electrically connected to the power supply terminal of the driver chip 202 in the driver circuit. The low-dropout linear regulator 40 is configured to convert the power signal VLED into the power signal VCC. Therefore, only one low-voltage side circuit is needed in the LLC isolated voltage conversion circuit to provide the power signal to the backlight assembly.

[0117] When the display device is in standby mode, the motherboard requires a power signal, but the driver chip in the backlight assembly does not. Therefore, the aforementioned LLC isolation voltage conversion circuit cannot be completely turned off, and the backlight assembly can still obtain a power signal.

[0118] Since the low-dropout linear regulator 40 located before the power supply terminals of each driver chip can only change the voltage and cannot control the conduction and shutdown of electrical signals, even when the backlight assembly 20 stops emitting light, the driver chip 202 in the backlight assembly 20 still has leakage current. Even if the leakage current of each driver chip is small, the large number of driver chips 202 in the micro-LED-based backlight assembly 20 will still cause the backlight assembly 20 to generate a considerable leakage current when the display device is in standby mode, resulting in a non-negligible power loss during standby.

[0119] Therefore, this application provides a display device by setting a power supply control circuit between the drive circuit and the controller of the display device. When the drive circuit drives the lamp board to emit light, the power supply control circuit supplies power to the drive chip based on the drive data provided by the controller and provides drive data so that the drive chip drives the lamp string on the backlight assembly to emit light. During the standby process of the display device, the power supply control circuit does not obtain drive data and stops supplying backlight to the drive chip, so that the drive chip reduces leakage current and reduces losses during the standby process of the display device.

[0120] The technical solutions of this application will be described in detail below with reference to specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0121] In some embodiments, the display device 200 includes a backlight assembly 20, which includes at least one power supply control circuit 60. The input port of the power supply control circuit 60 is electrically connected to the controller 250, the first output terminal of the power supply control circuit 60 is electrically connected to the power supply terminal of the drive circuit, and the second output terminal of the power supply control circuit 60 is electrically connected to the data input terminal of the drive circuit.

[0122] In some embodiments, when the power supply control circuit 60 is configured to receive drive data provided by the controller 250 from the input interface, it supplies power to the drive circuit and outputs drive data so that the drive circuit drives the light-emitting unit group to emit light based on the drive data.

[0123] The power supply control circuit 60 is configured to stop supplying power and providing drive data to the drive circuit when it does not receive drive data from the controller 250 from the input interface, so that the drive circuit stops driving the light-emitting unit group to emit light.

[0124] In some embodiments, the driving circuit includes at least one driving chip 202, and the power supply control circuit 60 corresponds to at least one driving chip 202. The first output terminal of the power supply control circuit 60 is electrically connected to the power supply terminal VCC of each driving chip 202, and the second output terminal is electrically connected to the data input terminal DIN of each driving chip 202.

[0125] In some embodiments, when the power supply control circuit 60 is configured to receive driving data provided by the controller 250, it supplies power to the corresponding driving chip 202 and outputs driving data so that the driving chip 202 drives the light-emitting unit group to emit light based on the driving data.

[0126] The power supply control circuit 60 is also configured to stop supplying power and providing drive data to the corresponding driver chip 202 when it does not receive drive data provided by the controller 250, so that the driver chip 202 stops driving the light-emitting unit group to emit light.

[0127] In some embodiments, at least one driver chip 202 corresponding to the power supply control circuit 60 is connected in parallel, as shown in the schematic diagram of the electrical connection relationship. Figure 6A , 6B As shown, the second output terminal of the power supply control circuit 60 is electrically connected to the data input terminal DIN of each driver chip 202.

[0128] Each driver chip 202 contains address information. The power supply control circuit 60 is configured to broadcast data including address information to the data line. The driver chip 202 corresponding to the address information obtains the driving data from the data line to drive its corresponding light-emitting unit group to emit light.

[0129] In other embodiments, at least one driver chip 202 corresponding to the power supply control circuit 60 is connected in series, as shown in the schematic diagram below. Figure 6C , 6DAs shown, the driver chip 202 has an input terminal DI and an output terminal DO. The data input terminal DI of the first driver chip 202 is electrically connected to the output terminal of the controller 250. The data input terminals DI of the other driver chips 202 are electrically connected to the data output terminals DO of the previous driver chip 202. Each driver chip 202 is configured to obtain drive data from its input terminal DI, obtain its corresponding drive data segment, and then output the drive data from its output terminal DO.

[0130] In some embodiments, the power supply control circuit 60 is configured with address information that is the same as the address information of the driver group consisting of at least one corresponding driver chip.

[0131] In some embodiments, the backlight assembly 20 includes multiple power supply control circuits 60, and the controller 250 is configured to output drive data, which includes address information of a target drive group. The controller 250 simultaneously transmits drive data to multiple power supply control circuits 60.

[0132] The power supply control circuit 60 is configured to supply power to the corresponding driver chip and transmit the driver data based on the address information in the drive data when the address information in the drive data is the same as its address information, so as to drive the corresponding light-emitting unit group to emit light.

[0133] The power supply control circuit 60 is also configured to not process the drive data when the address information in the drive data is different from its address information.

[0134] In some embodiments, the address information of the power supply control circuit 60 includes physical address and / or memory address.

[0135] When the address of the power supply control circuit 60 is a physical address, one pin of the power supply control circuit 60 is set as an address pin, and the address of that pin is set.

[0136] When the address of the power supply control circuit 60 is a memory address, the corresponding address information is pre-programmed into the register of the power supply control circuit 60.

[0137] In some embodiments, the power supply control circuit 60 is configured to supply power to the corresponding driver chip based on the driver data when receiving the driver data, and output the driver data after a preset time.

[0138] In some embodiments, the power supply control circuit 60 is further configured to obtain a power supply signal and, when the voltage values ​​of the power supply signal and the power supply signal of the driver chip 202 are inconsistent, convert the voltage value of the power supply signal into the voltage value of the power supply signal.

[0139] In other words, upon receiving a control signal, the power supply control circuit 60 determines whether it needs to supply power and transmit data to the driver chip. If it determines that power needs to be supplied to the driver chip, it may perform corresponding voltage conversion to ensure that the driver chip outputs the required operating voltage. After receiving the power supply signal, the driver chip can perform power-on initialization and other operations. The duration of these operations is less than a preset duration to ensure that the driver chip receives the drive data transmitted by the controller only after it has been stably powered on. This prevents the driver chip from acquiring incomplete drive data due to power supply delays, which could affect the backlight brightness and thus the display effect of the display device.

[0140] In some embodiments, the power supply control circuit 60 may be integrated into a power supply control chip or may be a discrete circuit; no specific limitation is made here.

[0141] Figure 7 For example, a display control method according to some embodiments, such as Figure 7 As shown, it includes:

[0142] S101 When the power supply control circuit receives the driving data, it supplies power to the driving circuit based on the driving data and outputs driving data so that the driving circuit drives the lamp board to emit light based on the driving data.

[0143] S102. When the power supply control circuit does not receive drive data, it stops supplying power to the drive circuit and stops providing drive data, so that the drive circuit stops driving the light-emitting unit group to emit light.

[0144] The structural diagram of the power supply control circuit 60 is as follows: Figure 8 As shown, the power signal obtained can be obtained in ways including but not limited to: power signals obtained from the power supply circuit and power signals obtained from the drive data transmitted from the controller. The two cases are explained below.

[0145] In some embodiments, when the power supply control circuit 60 receives a power supply signal obtained from the power supply circuit, the input port of the power supply control circuit 60 is electrically connected to the power supply circuit 13.

[0146] More specifically, the input port of the power supply control circuit 60 includes an input terminal and a power supply terminal. The input terminal of the power supply control circuit 60 is electrically connected to the controller 250, and the power supply terminal of the power supply control circuit 60 is electrically connected to the power supply circuit 13 and the power supply terminal of the lamp board. The connection relationship of the power supply control circuit 60 in the backlight assembly is as follows: Figure 6B and Figure 6D As shown.

[0147] The power supply control circuit 60 is configured to obtain a first power supply signal from the power supply circuit 13, and when it obtains the corresponding drive data, it outputs the first power supply signal based on the drive data as a chip power supply signal.

[0148] In some embodiments, the power supply control circuit 60 is configured to convert a first power supply signal into a chip power supply signal based on drive data to power the driver chip 202.

[0149] In some embodiments, the power supply control circuit 60 includes a control unit 602, the input terminal of which is coupled to the input terminal of the power supply control circuit 60, and is configured to receive drive data during the non-standby period of the display device, and generate a first control signal and a second control signal based on the drive data, wherein the start time of the first control signal is earlier than the start time of the second control signal by a preset duration.

[0150] In some embodiments, the control unit 602 is further configured to not accept drive data and not generate the first control signal and the second control signal during the standby period of the display device.

[0151] In some embodiments, the control unit 602 is configured to obtain address information from drive data, and when the address information in the drive data is the same as the address information set in the control unit 602, output a first control signal and a second control signal.

[0152] In some embodiments, the control unit 602 includes a delay circuit (e.g., an RC circuit). The delay circuit is configured to receive a first control signal and, after a preset duration, output a second control signal. The delay duration is determined based on the delay characteristic parameters of the devices in the delay circuit. For example, in an RC circuit, it is determined based on the resistance value of the resistor and the capacitance of the capacitor.

[0153] In some embodiments, the power supply control circuit 60 includes a DC voltage conversion unit 601, whose input terminal is coupled to the power supply terminal of the power supply control circuit 60, whose output terminal is electrically connected to the first output terminal of the power supply control circuit 60, and whose control terminal is electrically connected to the first output terminal of the control unit 602.

[0154] The DC-DC voltage conversion unit 601 is configured to obtain a first control signal from the control unit 602, obtain a first power supply signal from its input terminal, and output a first power supply signal based on the first control signal as a chip power supply signal.

[0155] In some embodiments, the DC-DC voltage conversion unit 601 is configured to convert a first power supply signal into a chip power supply signal based on a first control signal, and output the chip power supply signal. For example... Figure 8 As shown.

[0156] When the first power supply signal is the power supply signal for the light-emitting unit group, this first power supply signal is the power supply signal VLED, and the chip power supply signal is the power supply signal VCC, such as... Figure 9A , Figure 9B As shown.

[0157] In some embodiments, the DC-DC converter 601 includes a low-dropout linear regulator (LDO) and a controllable switching device. The controllable switching device is connected in series between the input terminal of the DC-DC converter 601 and the input terminal of the LDO. The DC-DC converter 601 is configured to control the conduction state of the controllable switching device based on a first control signal. When the switching device is on, the power supply signal VLED obtained at the input terminal of the LDO is converted into a chip power supply signal.

[0158] In some embodiments, the DC voltage conversion unit 601 includes a DC-DC conversion circuit (e.g., a Buck circuit), and a first control signal is configured to control the switching devices in the DC-DC conversion circuit to turn on for voltage conversion.

[0159] In some embodiments, the power supply control circuit 60 further includes a drive data transmission unit 603, whose input terminal is coupled to the input terminal of the power supply control circuit 60, whose output terminal is electrically connected to the second output terminal of the power supply control circuit 60, and whose control terminal is electrically connected to the second output terminal of the control unit 602.

[0160] The drive data transmission unit 603 is configured to obtain a second control signal from the control unit 602, obtain drive data from the controller 250, control its conduction state by the second control signal, and output drive data when it is on.

[0161] In some embodiments, the drive data transmission unit 603 includes a controllable switching device or a buffer amplifier, and the controllable switching device includes, but is not limited to, a field-effect transistor or a triode.

[0162] The controllable switching device and the buffer amplifier are configured to turn on when a second control signal is received, and output the drive data obtained at their input terminals.

[0163] When the drive data transmission unit includes a controllable switching device, the circuit structure of the power supply control circuit 60 is as follows: Figure 9A As shown; when the drive data transmission unit includes a buffer amplifier, the circuit structure of the power supply control circuit 60 is as follows. Figure 9B As shown.

[0164] In some embodiments, when the power supply control circuit 60 obtains the power signal from the drive data transmitted by the controller, the waveform diagram of the drive data generated by the controller 250 is first explained.

[0165] Figure 11 An example of a waveform diagram of driving data provided in this application will be shown below. Figure 11 The configuration functions of controller 250 are explained.

[0166] In some embodiments, the controller 250 is configured to obtain a frame of image data and a second power signal, acquire backlight data from the frame of image data, generate raw driving data based on the backlight data, and load the raw driving data onto the second power signal as driving data output by the controller.

[0167] refer to Figure 11 The waveform diagram shows that the second power supply signal is a high-level signal, and the original driving data is a signal with a frequency higher than that of the second power supply signal. Furthermore, the second power supply signal, after being loaded with the original driving data, does not change its level state; that is, after loading a low-level signal from the second power supply signal onto a high-level signal, it remains high. Therefore, in... Figure 11 In the waveform diagram shown, time period t1 represents the high-level signal of the second power supply signal when the original drive data is loaded, and time period t2 represents the low-level signal when the original drive data and the second power supply signal are not output.

[0168] The power supply control circuit 60 is configured to, after obtaining the above-mentioned driving data, separate the second power signal in the driving data from the original driving data, convert the separated second power signal into voltage to power the driving chip, and transmit the separated original driving data to the driving chip to drive the light string to emit light.

[0169] In some embodiments, the backlight assembly 20 includes a demodulation unit 70. The input terminal of the demodulation unit 70 is coupled to the controller 250, the first output terminal is connected to the input terminal of the DC voltage conversion unit 601, and the second output terminal is connected to the input terminals of the control unit 602 and the drive data transmission unit 603. It is configured to obtain a second power signal loaded with drive data from the controller 250, perform signal decoupling, output the second power signal from the first output terminal as the first power supply signal, and output drive data from the second output terminal.

[0170] In some embodiments, the starting band of the raw drive data includes address information, and the control unit 602 determines whether to output a first control signal based on this address information. The processing procedures here, as well as the control procedures of other units, have been explained in the foregoing embodiments and will not be repeated here.

[0171] In some embodiments, the driver chip 202 includes a demodulation unit 70, the input terminal of which is electrically connected to the input terminal of the power supply control circuit 60. A schematic diagram of the circuit structure of the power supply control circuit 60 is shown below. Figure 10 As shown.

[0172] In some other embodiments, the demodulation unit 70 is located outside the driver chip 202, and the demodulation unit 70 is electrically connected to at least one power supply control circuit 60.

[0173] Taking the demodulation unit 70 electrically connected to two power supply control circuits 60 as an example, the circuit connection relationship and control method between the demodulation unit 70 and the power supply control circuits 60 are explained. The circuit connection relationship between the demodulation unit 70 and the two power supply control circuits 60 is as follows: Figure 12 As shown.

[0174] In some embodiments, after the demodulation unit 70 decouples the second power signal carrying the driving data, it transmits the second power signal to the DC voltage conversion unit 601 in each of the corresponding power supply control circuits 60, and transmits the driving data to the control unit 602 and the driving data transmission unit 603 in each of the corresponding power supply control circuits 60.

[0175] The control unit 602 in each power supply control circuit 60 is configured to obtain address information from the drive data. When the address information corresponds to the address information, the corresponding DC voltage conversion unit 601 is controlled to supply power, and the corresponding drive data transmission unit 603 is controlled to output drive data.

[0176] In some embodiments, the input terminal of the demodulation unit 70 is provided with a gain amplifier, which is configured to amplify the drive data to prevent signal attenuation obtained by decoupling and ensure the driving accuracy of the power supply control circuit 60.

[0177] In other embodiments, the demodulation unit 70 includes address information, which is the address information of the drive groups corresponding to all power supply control circuits 60 electrically connected to it. The demodulation unit 70 is configured to demodulate the signal at the start time after receiving the second power signal carrying the drive data from the controller 250. The duration of the start time is a preset duration, and the signal at the start time terminal is the second power signal carrying the address information. When the address information matches the second power signal, demodulation continues; otherwise, demodulation stops. This circuit simplifies the operating losses of the demodulation unit.

[0178] This application also provides a display control device, such as... Figure 13 As shown, the display control device 500 includes:

[0179] The acquisition module 501 is configured to receive driver data;

[0180] The processing module 502 is configured to, when receiving driving data, supply power to the driving circuit electrically connected thereto based on the driving data, and output driving data so that the driving circuit drives the lamp board to emit light based on the driving data;

[0181] The processing module 502 is also configured to stop supplying power to the drive circuit and stop providing drive data when no drive data is received, so that the drive circuit stops driving the light-emitting unit group to emit light.

[0182] Among them, the driving data is the data generated by the controller based on the backlight data in a frame of image data.

[0183] In some embodiments, the processing module 502 is further configured to:

[0184] Power is supplied to the drive circuit based on the drive data;

[0185] After a preset duration, output the driving data.

[0186] In some embodiments, the processing module 502 is further configured to:

[0187] The first power supply signal is obtained from the power supply circuit;

[0188] The power supply signal of the DC-DC voltage conversion unit output chip is controlled based on the driving data.

[0189] The display device also includes a power supply circuit, and the input port of the power supply control circuit includes a power supply terminal. The power supply circuit and the power supply control circuit are electrically connected.

[0190] The power supply control circuit includes a DC-DC voltage conversion unit, the input terminal of which is electrically connected to the power supply circuit, and the output terminal of which is electrically connected to the output terminal of the power supply control circuit.

[0191] In some embodiments, the processing module 502 is further configured to:

[0192] When the control unit obtains the drive data, it obtains the first control signal generated by the control unit based on the drive data;

[0193] Based on the first control signal, the DC voltage conversion unit is controlled to convert the first power supply signal into a chip power supply signal;

[0194] Output chip power supply signal.

[0195] The power supply control circuit also includes a control unit, whose input terminal is electrically connected to the controller, and whose first output terminal is electrically connected to the control terminal of the DC voltage conversion unit.

[0196] In some embodiments, the processing module 502 is further configured to:

[0197] When the control unit obtains the drive data, it obtains the second control signal generated by the control unit based on the drive data;

[0198] Based on the second control signal, the control drive data transmission unit is turned on, and drive data is output.

[0199] The power supply control circuit includes a drive data transmission unit and a control unit, and the input port of the power supply control circuit includes an input terminal.

[0200] The input terminal of the drive data transmission unit, the input terminal of the control unit, and the input terminal of the power supply control circuit are electrically connected, and the second output terminal of the control unit is electrically connected to the control terminal of the drive data transmission unit.

[0201] In some embodiments, the processing module 502 is further configured to:

[0202] When the control unit obtains the drive data, it obtains the first control signal generated by the control unit based on the drive data;

[0203] The control unit performs timing based on the first control signal;

[0204] When the timing duration exceeds the preset duration, a second control signal generated by the control unit is obtained.

[0205] In some embodiments, the acquisition module 501 is configured to:

[0206] Obtain one frame of image data, which includes backlight data;

[0207] In some embodiments, the processing module 502 is configured to:

[0208] Based on the backlight data, drive data is output so that when the power supply control circuit receives drive data, it supplies power to the drive circuit based on the drive data and outputs drive data to control the drive circuit to drive the lamp board to emit light based on the drive data; when no drive data is received, it stops supplying power to the drive circuit and providing drive data, and controls the drive circuit to stop driving the light-emitting unit group to emit light.

[0209] In some embodiments, the processing module 502 is further configured to:

[0210] Obtain the address information of the power supply control circuit and the second power signal;

[0211] Based on address information and backlight data, generate driving data;

[0212] The drive data loaded on the second power signal is output so that the demodulation unit demodulates the drive data loaded on the second power signal. The second power signal is output from the first output terminal, and the drive data is output from the second output terminal. When the address information of the power supply control circuit is the same as the address information in the drive data, the power supply control circuit is controlled to supply power to the drive circuit based on the drive data and the drive data is output.

[0213] The display device also includes a demodulation unit; the input terminal of the demodulation unit is electrically connected to the controller, the first output terminal of the demodulation unit is electrically connected to the power supply terminal of at least one power supply control circuit, and the second output terminal of the demodulation unit is electrically connected to the input terminal of at least one power supply control circuit.

[0214] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0215] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that, The display device includes: Display panel; The controller, which is electrically connected to the display panel, is configured to output drive data; The backlight assembly includes: at least one power supply control circuit, a driver circuit, and a lamp board; The lamp panel includes an array of lamp beads, and at least one lamp bead is electrically connected to form a light-emitting unit group; The driving circuit includes at least one driving chip; The input port of the power supply control circuit is electrically connected to the controller, its first output terminal is electrically connected to the power supply terminal of at least one corresponding driver chip, and its second output terminal is coupled to the data input terminal of the at least one driver chip. The power supply control circuit is configured to output a chip power supply signal from its first output terminal and output the drive data from its second output terminal when receiving the drive data. The power supply control circuit is also configured to stop outputting the chip power supply signal and the drive data when it does not receive the drive data. The driving chip is electrically connected to at least one light-emitting unit group and is configured to drive the light-emitting unit group to emit light based on the driving data and the chip power supply signal.

2. The display device according to claim 1, characterized in that, The power supply control circuit includes: The control unit, whose input terminal is coupled to the input port of the power supply control circuit, is configured to obtain the drive data from its input terminal, output a first control signal from its first output terminal, and output a second control signal from its second output terminal; A DC-DC voltage conversion unit has its input terminal coupled to the input port of the power supply control circuit, its output terminal electrically connected to the first output terminal of the power supply control circuit, and its control terminal electrically connected to the first output terminal of the control unit. It is configured to obtain a first power supply signal from its input terminal and, when it obtains the first control signal at its control terminal, output the chip power supply signal. The DC-DC voltage conversion unit is also configured to not output the chip power supply signal when it does not receive the first control signal at its control terminal; A drive data transmission unit has its input terminal coupled to the input port of the power supply control circuit, its output terminal electrically connected to the second output terminal of the power supply control circuit, and its control terminal electrically connected to the second output terminal of the control unit. It is configured to obtain drive data from its input terminal and output the drive data when it obtains the second control signal at its control terminal. The drive data transmission unit is also configured to stop outputting the drive data when it does not receive the second control signal at its control terminal.

3. The display device according to claim 2, characterized in that, The controller is also configured to output a second power signal that loads drive data; The backlight assembly further includes a demodulation unit, whose input terminal is coupled to the controller, whose first output terminal is electrically connected to the input terminal of the control unit and the input terminal of the drive data transmission unit, and whose second output terminal is electrically connected to the input terminal of the DC voltage conversion unit. It is configured to obtain a second power signal for loading drive data, output the drive data from its first output terminal, and output the second power signal from its second output terminal as the first power supply signal.

4. The display device according to claim 3, characterized in that, The power supply control circuit includes the demodulation unit; The input port of the power supply control circuit includes an input terminal, which is configured to obtain a second power signal from the input terminal to load the drive data; The input terminal of the demodulation unit is electrically connected to the input terminal of the power supply control circuit.

5. The display device according to claim 2, characterized in that, The display device further includes: a power supply circuit; The input port of the power supply control circuit is electrically connected to the power supply circuit and is configured to obtain the first power supply signal from the input port; The power supply terminal of the lamp board is electrically connected to the power supply circuit.

6. The display device according to claim 5, characterized in that, The input port of the power supply control circuit includes an input terminal and a power supply terminal; The input terminal of the power supply control circuit is electrically connected to the controller and is configured to obtain the drive data from the input terminal; The power supply control circuit is electrically connected to the power supply circuit and is configured to obtain the first power supply signal from the power supply terminal.

7. The display device according to claim 6, characterized in that, The input terminal of the power supply control circuit is electrically connected to the input terminal of the control unit and the input terminal of the drive data transmission unit; The power supply control circuit is electrically connected to the input terminal of the DC voltage conversion unit.

8. The display device according to claim 6, characterized in that, The power supply control circuit and the lamp board are electrically connected.

9. The display device according to any one of claims 2 to 8, characterized in that, The drive data transmission unit includes a controllable switching device or a buffer amplifier.

10. The display device according to any one of claims 2 to 8, characterized in that, The DC-DC voltage conversion unit shown includes: A controllable switching device, the first terminal of which is electrically connected to the first terminal of the DC voltage conversion unit, and the control terminal of which is electrically connected to the control terminal of the DC voltage conversion unit; The DC-DC converter circuit has its input terminal electrically connected to the second terminal of the controllable switching device, and its output terminal electrically connected to the output terminal of the DC-DC voltage conversion unit.

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