Display devices and backlight control methods

Abstract

This application relates to a display device and a backlight control method. The display device includes: a display panel; a backlight module, the backlight module including a backlight driving circuit and multiple light-emitting units, each light-emitting unit including multiple light-emitting chips, the multiple light-emitting chips corresponding one-to-one with multiple color channels, and the backlight driving circuit electrically connected to the multiple light-emitting units; a control module, the control module being connected to both the display panel and the backlight driving circuit; wherein, the control module is configured to: send feedback control commands to the backlight driving circuit, causing the backlight driving circuit to establish at least two independent signal feedback channels with the multiple light-emitting units, and send voltage feedback data obtained through each signal feedback channel to the control module; and adjust the operating voltage provided by the backlight driving circuit to each light-emitting chip according to the voltage feedback data of each signal feedback channel. This method can improve the voltage regulation efficiency of the light-emitting devices in the backlight assembly.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device, a backlight control method, a computer-readable storage medium, and a computer program product. Background Technology

[0002] With the advancement and development of display technology, the requirements for the display effect of display devices are also increasing. The light emission stability, lifespan, and energy consumption of the light-emitting devices in display devices often depend on the precise control of their operating voltage. Therefore, achieving accurate detection of the operating status of the light-emitting units and dynamic adjustment of their operating voltage is crucial to improving the display effect of display devices.

[0003] Traditional display devices often report the operating status of each light-emitting unit in the backlight assembly, such as LED undervoltage status, by sending feedback data packets from the backlight driver circuit to the controller. The controller then dynamically adjusts the operating voltage of each light-emitting unit based on its operating status. However, a complete feedback data packet often records the operating status of multiple different light-emitting units, resulting in a relatively large amount of data. This requires a considerable amount of time to parse and process the feedback data packet to obtain the operating status of each light-emitting unit, which is detrimental to improving the efficiency of adjusting the operating voltage of the backlight light-emitting devices in the display device.

[0004] Therefore, display devices in traditional technologies suffer from low voltage regulation efficiency of the backlight components' light-emitting devices. Summary of the Invention

[0005] Therefore, it is necessary to provide a display device, a backlight control method, a computer-readable storage medium, and a computer program product that can improve the voltage regulation efficiency of the light-emitting devices of the backlight assembly, in order to address the above-mentioned technical problems.

[0006] In a first aspect, this application provides a display device, comprising:

[0007] Display panel:

[0008] A backlight module, the backlight module including a backlight driving circuit and a plurality of light-emitting units, each light-emitting unit including a plurality of light-emitting chips, the plurality of light-emitting chips corresponding one-to-one with a plurality of color channels, the backlight driving circuit being electrically connected to the plurality of light-emitting units, the backlight driving circuit being configured to drive each light-emitting chip in each light-emitting unit to emit light respectively.

[0009] The control module is connected to both the display panel and the backlight driving circuit.

[0010] The control module is configured as follows:

[0011] A feedback control command is sent to the backlight driving circuit to establish at least two independent signal feedback channels between the backlight driving circuit and the plurality of light-emitting units; the signal feedback channel includes a signal connection channel between the backlight driving circuit and at least one of the light-emitting units; the signal connection channel is used to transmit the undervoltage feedback signal of the corresponding light-emitting unit.

[0012] The voltage feedback data obtained through each of the signal feedback channels is sent to the control module; each voltage feedback data includes an undervoltage feedback signal of at least one of the light-emitting chips corresponding to the corresponding signal feedback channel;

[0013] Based on the voltage feedback data of each of the signal feedback channels, the operating voltage provided by the backlight driving circuit to each of the light-emitting chips is adjusted.

[0014] The above technical solution has the following advantages or effects: By setting a display panel, a backlight module, and a control module in the display device, the backlight module includes a backlight driving circuit and multiple light-emitting units, each light-emitting unit includes multiple light-emitting chips, and the multiple light-emitting chips correspond one-to-one with multiple color channels. The backlight driving circuit is electrically connected to the multiple light-emitting units and is configured to drive each light-emitting chip in each light-emitting unit to emit light. By connecting the control module to the display panel and the backlight driving circuit respectively, and configuring the control module to send feedback control commands to the backlight driving circuit, the backlight driving circuit establishes at least two independent signal feedback channels with the multiple light-emitting units, and sends the voltage feedback data obtained through each signal feedback channel to the control module, so that the control module can respond according to the signals. The voltage feedback data from the feedback channel is used to adjust the operating voltage provided by the backlight driving circuit to each of the light-emitting chips. This effectively avoids the backlight driving circuit packaging all the undervoltage feedback signals from all the light-emitting chips in the backlight module into a complete voltage feedback data set and transmitting it to the control module at once. This effectively reduces the amount of voltage feedback data processed by the control module each time, shortens the time it takes to parse the voltage feedback data, and allows the control module (e.g., backlight controller, system-on-a-chip, etc.) to use most of its computing resources to accurately determine the operating voltage adjustment requirements of the light-emitting chips connected to each signal feedback channel, and to adjust the operating voltage of each light-emitting chip in a timely manner according to these requirements. This effectively improves the efficiency of the display device in regulating the operating voltage of the light-emitting devices in the backlight module.

[0015] In one embodiment, the backlight driving circuit includes a feedback control element electrically connected to the control module, and the backlight driving circuit is configured to:

[0016] According to the channel feedback control parameters stored in the feedback control element, at least two signal feedback channels are established with each of the light-emitting chips respectively; the channel feedback control parameters are used to control the way in which the backlight driving circuit establishes the signal feedback channels with each of the light-emitting chips respectively;

[0017] The undervoltage feedback signal of the corresponding light-emitting chip is obtained through each of the signal feedback channels, and the voltage feedback data of each of the signal feedback channels is obtained.

[0018] The above technical solution has the following advantages or effects: By configuring a feedback control element in the backlight driving circuit and storing the method for controlling the backlight driving circuit to establish signal feedback channels with each light-emitting chip, the channel feedback control parameters can be preset or updated using the feedback control element. This allows for flexible adjustment of the method for establishing signal feedback channels between the backlight driving circuit and multiple light-emitting units using the channel feedback control parameters, as well as the timing of acquiring the undervoltage feedback signal of the light-emitting chip through each signal feedback channel. This enables parameterized control of the feedback channels and achieves the beneficial effect of more comprehensive and orderly coverage of undervoltage monitoring of all light-emitting chips.

[0019] In one embodiment, each of the signal feedback channels includes multiple signal connection channels between the multiple light-emitting chips of the same color channel and the backlight driving circuit.

[0020] The above technical solution has the following advantages or effects: By setting each signal feedback channel as multiple signal connection channels between multiple light-emitting chips of the same color channel and the backlight driving circuit, it is possible to effectively take into account that light-emitting chips of the same color channel have similar light-emitting characteristics, voltage requirements and fault modes (for example, red chips may be more prone to undervoltage due to material characteristics). By incorporating multiple light-emitting chips of the same color channel into the same signal feedback channel, it is possible to detect the undervoltage state of multiple light-emitting chips belonging to the same color channel in a single detection and perform unified voltage control, thereby ensuring that the light-emitting state of all light-emitting chips in the same color channel is consistent, effectively improving the color uniformity and reproduction of the displayed image.

[0021] In one embodiment, when the feedback control element is a register, the feedback control instruction includes a feedback data packet, and the backlight driving circuit is configured to:

[0022] The channel enable configuration data of the register is updated according to the feedback data packet sent by the control module; each channel enable configuration data corresponds to one of the color channels;

[0023] According to the channel enable configuration data, multiple signal connection channels between multiple light-emitting chips of the same color channel and the backlight driving circuit are enabled simultaneously. The undervoltage feedback signal of the corresponding light-emitting chip is obtained through the multiple signal connection channels to obtain the voltage feedback data of the signal feedback channel corresponding to the color channel.

[0024] The voltage feedback data of the signal feedback channel corresponding to the color channel is sent to the control module.

[0025] The above technical solution has the following advantages or effects: By using the mature hardware memory of registers as the feedback control element, and taking advantage of the simple read and write operation and fast response speed of registers, it can effectively adapt to high-frequency configuration updates. Furthermore, by using feedback data packets as a standardized control command format, the communication logic between the control module and the backlight driving circuit can be made more standardized, and no complex protocol parsing is required. This enables the control module to quickly and accurately obtain the undervoltage feedback status of the light-emitting chips of each color channel, thereby improving the stability and reliability of the backlight feedback system.

[0026] In one embodiment, each of the signal feedback channels is a signal feedback channel between the light-emitting chip and the backlight driving circuit.

[0027] The above technical solution has the following advantages or effects: by setting a signal feedback channel as a signal feedback channel between a light-emitting chip and a backlight driving circuit, the backlight driving circuit can directly obtain the independent undervoltage feedback signal of a single light-emitting chip, rather than the grouped or color channel-level aggregated signal, which effectively improves the precision of the control module in obtaining the undervoltage state of each light-emitting chip, thereby enabling the control module to more accurately locate the voltage abnormality of a specific light-emitting chip.

[0028] In one embodiment, when the feedback control element is a delay module, the feedback control command includes brightness data, and the backlight driving circuit is configured to:

[0029] In response to the brightness data sent by the control module, the undervoltage feedback signal of the corresponding light-emitting chip is obtained sequentially through each of the signal feedback channels according to the delay time configured by the delay module.

[0030] The undervoltage feedback signals of each of the signal feedback channels are sent sequentially to the control module.

[0031] The above technical solution has the following advantages or effects: By responding to the brightness data sent by the control module, and obtaining the corresponding undervoltage feedback signals of the light-emitting chips in sequence through each signal feedback channel according to the delay time configured by the delay module, and sending the undervoltage feedback signals of each signal feedback channel to the control module in sequence, the undervoltage feedback signals received by the control module from each signal feedback channel can have a clear time sequence correspondence. The control module can directly locate the light-emitting chip in the undervoltage state through the time sequence of the undervoltage feedback signals and the corresponding channel number, effectively simplifying the data parsing logic of the control module for voltage feedback data and improving the data parsing efficiency of the control module for voltage feedback data.

[0032] In one embodiment, the control module is configured to:

[0033] Based on the voltage feedback data of the signal feedback channel, determine the undervoltage state of at least one light-emitting chip corresponding to the signal feedback channel;

[0034] Based on the undervoltage state of the at least one light-emitting chip, the feedback voltage parameter corresponding to the at least one light-emitting chip is increased or decreased to adjust the operating voltage provided by the backlight driving circuit to the at least one light-emitting chip.

[0035] The above technical solution has the following advantages or effects: it can effectively shorten the time for the control module to parse voltage feedback data each time, so that the control module (such as the backlight controller, system-on-a-chip, etc.) can use most of its computing resources to accurately determine the working voltage adjustment requirements of the light-emitting chips connected to each signal feedback channel, and adjust the working voltage of each light-emitting chip in a timely manner according to the working voltage adjustment requirements of each light-emitting chip, thereby effectively improving the efficiency of the display device in regulating the working voltage of the light-emitting devices in the backlight module.

[0036] Secondly, this application also provides a backlight control method applied to the backlight driving circuit of a display device as described above, the method comprising:

[0037] In response to the feedback control command sent by the control module, at least two independent signal feedback channels are established with the plurality of light-emitting units; each signal feedback channel corresponds to at least one light-emitting chip;

[0038] The undervoltage feedback signal of the corresponding light-emitting chip is obtained through each of the signal feedback channels, and the voltage feedback data of each of the signal feedback channels is obtained.

[0039] The voltage feedback data of each of the signal feedback channels is sent to the control module, so that the control module adjusts the operating voltage provided by the backlight driving circuit to each of the light-emitting chips according to the voltage feedback data of each of the signal feedback channels.

[0040] Thirdly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above-described method.

[0041] Fourthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the above-described method.

[0042] The aforementioned display device, backlight control method, computer-readable storage medium, and computer program product, by arranging a display panel, a backlight module, and a control module in the display device, wherein the backlight module includes a backlight driving circuit and multiple light-emitting units, each light-emitting unit including multiple light-emitting chips, and the multiple light-emitting chips corresponding one-to-one with multiple color channels, the backlight driving circuit being electrically connected to the multiple light-emitting units, and the backlight driving circuit being configured to drive each light-emitting chip in each light-emitting unit to emit light; by connecting the control module to the display panel and the backlight driving circuit respectively, and configuring the control module to send feedback control commands to the backlight driving circuit, the backlight driving circuit establishes at least two independent signal feedback channels with the multiple light-emitting units, and sends the voltage feedback data obtained through each signal feedback channel to the control module, so that the control module can... Based on the voltage feedback data from each signal feedback channel, the operating voltage provided by the backlight driving circuit to each of the light-emitting chips is adjusted. This effectively avoids the backlight driving circuit packaging all undervoltage feedback signals from all light-emitting chips in the backlight module into a complete voltage feedback data set and transmitting it to the control module at once. This effectively reduces the amount of voltage feedback data processed by the control module each time, shortens the time required for the control module to parse the voltage feedback data each time, and allows the control module (e.g., backlight controller, system-on-a-chip, etc.) to dedicate most of its computing resources to accurately determining the operating voltage adjustment requirements of the light-emitting chips connected to each signal feedback channel, and to adjusting the operating voltage of each light-emitting chip in a timely manner according to the operating voltage adjustment requirements of each light-emitting chip. This effectively improves the efficiency of the display device in regulating the operating voltage of the light-emitting devices in the backlight module. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of a display device in one embodiment;

[0045] Figure 2 This is a schematic diagram of a backlight driving circuit in one embodiment;

[0046] Figure 3 This is a schematic diagram of another display device in one embodiment;

[0047] Figure 4 This is a schematic diagram of yet another display device in one embodiment;

[0048] Figure 5 This is a schematic diagram of the steps of the first backlight control method in one embodiment;

[0049] Figure 6 This is a timing diagram of a backlight control method in one embodiment;

[0050] Figure 7 This is a schematic diagram of the steps of the second backlight control method in one embodiment;

[0051] Figure 8 This is a schematic diagram of the steps of the third backlight control method in one embodiment;

[0052] Figure 9 This is a schematic diagram of a feedback signal in one embodiment;

[0053] Figure 10 This is a schematic diagram of the steps of the fourth backlight control method in one embodiment;

[0054] Figure 11 This is a timing diagram of another backlight control method in one embodiment;

[0055] Figure 12 This is a schematic diagram of another feedback signal in one embodiment;

[0056] Figure 13 This is a schematic diagram of the steps of the fifth backlight control method in one embodiment;

[0057] Figure 14 This is a flowchart illustrating a backlight control method in one embodiment;

[0058] Figure 15 This is a structural block diagram of a backlight control device in one embodiment. Detailed Implementation

[0059] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0061] When used herein, the singular forms of “a,” “an,” and “ / the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, in this specification, the term “and / or” includes any and all combinations of the associated listed items.

[0062] An LCD TV is a display device that uses the special optical properties of liquid crystal molecules. The structure of an LCD TV consists of liquid crystals placed between two parallel glass plates. There are many fine vertical and horizontal wires between the two glass plates. By controlling whether or not electricity is applied, the rod-shaped crystal molecules are changed in direction, refracting light to produce an image.

[0063] With the advancement and development of display technology, the requirements for the display effect of display devices are also increasing. More and more LCD TVs are adopting backlight local dimming (PDD) technology. PDD technology divides the backlight layer of an LCD TV into multiple independent control zones, each of which can have its brightness, color, or be turned off independently, achieving precise backlight control. Each independent control zone can include multiple light-emitting units (e.g., RGB-LEDs), and the luminous stability, lifespan, and energy consumption of these units often depend on the precise control of their operating voltage.

[0064] Therefore, LCD TVs require backlight compensation through local dimming technology to enhance image brightness and contrast, thereby improving display quality. In practical applications, when a display device performs local dimming, the backlight controller reads the state of the backlight driver circuit (driver IC, driver chip) via data signals. Based on the state of the backlight driver circuit, it adjusts the FB signal (feedback signal) of the backlight driver circuit, thereby adjusting the VLED voltage of the light-emitting chip to ensure normal LED output brightness.

[0065] Specifically, when a certain light-emitting chip is in an undervoltage state, the backlight driver circuit can send a Sick signal (undervoltage signal) to the backlight controller. After receiving the Sick signal, the backlight controller can reduce the FB feedback voltage of the light-emitting chip. The backlight controller compares the reduced FB feedback voltage with a preset voltage threshold. If the comparison result shows that the FB feedback voltage is lower than the voltage threshold, the backlight controller is triggered to issue a boost command. The backlight controller can adjust the operating parameters of the backlight driver circuit (e.g., increase the PWM duty cycle of the power module of the backlight driver circuit) to increase the power output power, thereby increasing the VLED voltage of the light-emitting chip to compensate for the undervoltage state of the light-emitting chip. The adjustment stops when the VLED voltage of the light-emitting chip stabilizes at the target value and the FB feedback voltage returns to the matching reference.

[0066] Conversely, when the LED chip is not undervoltage, the backlight driver circuit will not report a Sick signal to the backlight controller. The backlight controller then determines that the VLED voltage of the LED chip is high enough. The backlight controller can increase the FB feedback voltage of the LED chip to appropriately reduce the VLED voltage of the LED chip, thereby ensuring that the power supply outputs a stable VLED voltage to the LED chip.

[0067] In one exemplary embodiment, such as Figure 1 As shown, a display device is provided, the display device comprising:

[0068] Display panel 1100;

[0069] The backlight module 1200 includes a backlight driving circuit 1210 and multiple light-emitting units 1220. Each light-emitting unit 1220 includes multiple light-emitting chips 1222, and the multiple light-emitting chips 1222 correspond one-to-one with multiple color channels. In other words, the light emitted by each light-emitting chip 1222 in each light-emitting unit 1220 has a different wavelength.

[0070] Specifically, each light-emitting unit 1220 may include three light-emitting units 1222, and the three light-emitting units 1222 correspond one-to-one with three color channels. For example, each light-emitting unit 1220 may include a red LED chip, a green LED chip, and a blue LED chip; that is, the red LED chip corresponds to the red color channel (R channel), the green LED chip corresponds to the green color channel (G channel), and the blue LED chip corresponds to the blue color channel (B channel).

[0071] The backlight driving circuit 1210 is electrically connected to multiple light-emitting units 1220, and the backlight driving circuit 1210 is configured to drive each light-emitting chip 1222 in each light-emitting unit 1220 to emit light.

[0072] Specifically, the backlight driving circuit can refer to an RGB driver IC (RGB driver chip), such as... Figure 2 As shown, Figure 2 An exemplary schematic diagram of the channel connections of an RGB driver IC is shown; wherein the RGB driver IC is used to connect at least four light-emitting units. Specifically, channels 1, 2, and 3 of the RGB driver IC are sequentially connected to the red LED chip (LED_R), green LED chip (LED_G), and blue LED chip (LED_B) in the first light-emitting unit, respectively; channels 4, 5, and 6 of the RGB driver IC are sequentially connected to the red LED chip (LED_R), green LED chip (LED_G), and blue LED chip (LED_B) in the second light-emitting unit, respectively; channels 7, 8, and 9 of the RGB driver IC are sequentially connected to the red LED chip (LED_R), green LED chip (LED_G), and blue LED chip (LED_B) in the third light-emitting unit, respectively; and channels 10, 11, and 12 of the RGB driver IC are sequentially connected to the red LED chip (LED_R), green LED chip (LED_G), and blue LED chip (LED_B) in the fourth light-emitting unit, respectively.

[0073] Please see again. Figure 1 The display device also includes a control module 1300, which is connected to the display panel 1100 and the backlight driving circuit 1210 respectively.

[0074] In practical applications, such as Figure 3 As shown, the control module 1300 may include a backlight control circuit 1310 and a system-on-chip (SoC) 1320. Specifically, the backlight control circuit 1310 may be a BCON (Backlight Controller) chip. The first terminal of the backlight control circuit 1310 may be electrically connected to the display panel 1100 of the display device through the SoC 1320 on the display device's motherboard; the second terminal of the backlight control circuit 1310 may be electrically connected to the backlight driver circuit 1210.

[0075] Optional, such as Figure 4 As shown, the control module 1300 can also refer to a system-on-a-chip 1320 with backlight control function. The first terminal of the system-on-a-chip 1320 is electrically connected to the display panel 1100 of the display device; the second terminal of the system-on-a-chip 1320 is electrically connected to the backlight driving circuit 1210.

[0076] It should be noted that in the technical solution of this application, the control module 1300 can also be named the main control IC (main control chip).

[0077] like Figure 5 As shown, the control module 1300 can be configured to perform the following steps S120 to S140. Wherein:

[0078] Step S120: Send feedback control commands to the backlight driving circuit to establish at least two independent signal feedback channels between the backlight driving circuit and multiple light-emitting units, and send the voltage feedback data obtained through each signal feedback channel to the control module.

[0079] The feedback control command can be a control command used to trigger the backlight driving circuit to feed back the undervoltage status of each light-emitting chip in the backlight module 1200 to the control module. In practical applications, this feedback control command can be configured to allow the backlight driving circuit to collect the undervoltage status of each light-emitting chip in a specific manner.

[0080] Among them, the signal feedback channel can refer to the signal connection channel through which the backlight driving circuit collects undervoltage feedback signals that reflect the undervoltage state of each light-emitting chip.

[0081] Specifically, the signal feedback channel includes a signal connection channel between the backlight driving circuit and at least one light-emitting unit; the signal connection channel is used to transmit the undervoltage feedback signal of the corresponding light-emitting unit.

[0082] Each voltage feedback data point includes an undervoltage feedback signal from at least one light-emitting chip corresponding to the respective signal feedback channel. In other words, the voltage feedback data corresponding to each signal feedback channel includes an undervoltage feedback signal from at least one light-emitting chip connected to that signal feedback channel.

[0083] In specific implementation, such as Figure 6 As shown, Figure 6 An exemplary timing diagram of a backlight control method is provided. When the control module 1300 includes a backlight control circuit 1310 and a system-on-a-chip 1320, the system-on-a-chip 1320 sends SPI data (including backlight brightness data) to the backlight control circuit 1310. After processing, the backlight control circuit 1310 sends the processed backlight brightness data as a feedback control command to the backlight drive circuit 1210.

[0084] After receiving a feedback control command, the backlight driving circuit 1210 can respond to the feedback control command and establish at least two independent signal feedback channels with each light-emitting chip 1222 in the multiple light-emitting units 1220.

[0085] For example, the signal feedback channel may include a first signal feedback channel, a second signal feedback channel, and a third signal feedback channel; wherein, the first signal feedback channel is the signal connection channel between the backlight driving circuit 1210 and the light-emitting chip with a red light emission color, i.e. Figure 2 Channels 1, 4, 7, and 10 are shown; the second signal feedback channel is the signal connection channel between the backlight driving circuit 1210 and the green-emitting chip, i.e. Figure 2 Channels 2, 5, 8, and 11 are shown; the third signal feedback channel is the signal connection channel between the backlight driving circuit 1210 and the blue-emitting chip, i.e. Figure 2 Channels 3, 6, 9, and 12 are shown. Of course, the signal feedback channel can also refer to the signal connection channel between the backlight driving circuit 1210 and each light-emitting chip 1222; that is, the signal feedback channel refers to... Figure 2 Channels 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12.

[0086] The backlight driving circuit 1210 can collect the undervoltage feedback signal of the light-emitting chip connected to each signal feedback channel through each signal feedback channel according to the preset acquisition timing, obtain the voltage feedback data of each signal feedback channel, and send the voltage feedback data of each signal feedback channel to the backlight control circuit 1310 in sequence.

[0087] Continuing with the previous example, the voltage feedback data of the first signal feedback channel can include the undervoltage feedback signal of the light-emitting chip with a red light color; the voltage feedback data of the second signal feedback channel can include the undervoltage feedback signal of the light-emitting chip with a green light color; and the voltage feedback data of the third signal feedback channel can include the undervoltage feedback signal of the light-emitting chip with a blue light color.

[0088] Step S140: Adjust the operating voltage provided by the backlight driving circuit to each light-emitting chip according to the voltage feedback data of each signal feedback channel.

[0089] After receiving the voltage feedback data from each signal feedback channel, the backlight control circuit 1310 can sequentially analyze the voltage feedback data from each signal feedback channel to obtain the undervoltage state of each light-emitting chip; then, the backlight control circuit 1310 can adjust the operating voltage of the light-emitting chip according to the undervoltage state of each light-emitting chip.

[0090] Specifically, when the backlight control circuit 1310 determines that the light-emitting unit A is in an undervoltage state, the backlight control circuit 1310 can reduce the FB feedback voltage of the light-emitting unit A. The backlight control circuit 1310 can compare the FB feedback voltage of the light-emitting unit A with a preset voltage threshold. If the comparison result shows that the FB feedback voltage of the light-emitting unit A is less than the preset voltage threshold, the backlight control circuit 1310 can perform a boost operation on the light-emitting unit A, adjust the operating parameters of the backlight drive circuit 1210 (e.g., increase the PWM duty cycle of the power module connected to the light-emitting unit A), increase the output power of the power module, and increase the VLED voltage of the light-emitting unit A, so that the light-emitting unit A changes from an undervoltage state to a full voltage state. After the VLED voltage of the light-emitting unit A stabilizes at the target value, the backlight control circuit 1310 adjusts the FB feedback voltage of the light-emitting unit A back to the reference value, and the adjustment stops.

[0091] The above technical solution has the following advantages or effects: By setting a display panel, a backlight module, and a control module in the display device, the backlight module includes a backlight driving circuit and multiple light-emitting units, each light-emitting unit includes multiple light-emitting chips, and the multiple light-emitting chips correspond one-to-one with multiple color channels. The backlight driving circuit is electrically connected to the multiple light-emitting units and is configured to drive each light-emitting chip in each light-emitting unit to emit light. By connecting the control module to the display panel and the backlight driving circuit respectively, and configuring the control module to send feedback control commands to the backlight driving circuit, the backlight driving circuit establishes at least two independent signal feedback channels with the multiple light-emitting units, and sends the voltage feedback data obtained through each signal feedback channel to the control module, so that the control module can respond according to the signals. The voltage feedback data from the feedback channel is used to adjust the operating voltage provided by the backlight driving circuit to each of the light-emitting chips. This effectively avoids the backlight driving circuit packaging all the undervoltage feedback signals from all the light-emitting chips in the backlight module into a complete voltage feedback data set and transmitting it to the control module at once. This effectively reduces the amount of voltage feedback data processed by the control module each time, shortens the time it takes to parse the voltage feedback data, and allows the control module (e.g., backlight controller, system-on-a-chip, etc.) to use most of its computing resources to accurately determine the operating voltage adjustment requirements of the light-emitting chips connected to each signal feedback channel, and to adjust the operating voltage of each light-emitting chip in a timely manner according to these requirements. This effectively improves the efficiency of the display device in regulating the operating voltage of the light-emitting devices in the backlight module.

[0092] In one exemplary embodiment, such as Figure 1 As shown, the backlight driving circuit 1210 includes a feedback control element 1212 that is electrically connected to the control module 1300.

[0093] like Figure 7 As shown, the backlight driving circuit 1210 of the display device is configured to perform the following steps S210 to S220. Wherein:

[0094] In step S210, at least two signal feedback channels are established with each light-emitting chip according to the channel feedback control parameters stored in the feedback control element.

[0095] The channel feedback control parameters are used to control how the backlight driving circuit establishes signal feedback channels with each light-emitting chip. In practical applications, the feedback control element can pre-store these channel feedback control parameters; alternatively, the control module can write the channel feedback control parameters carried by the feedback control command to the feedback control element via the feedback control command.

[0096] In specific implementation, the control module 1300 sends a feedback control command to the backlight driving circuit 1210. The backlight driving circuit 1210, in response to this command, reads the corresponding channel feedback control parameters from the feedback control element 1212. Based on these channel feedback control parameters, the backlight driving circuit 1210 then establishes at least two signal feedback channels with each light-emitting chip. Specifically, the backlight driving circuit 1210 can establish at least two signal feedback channels with each light-emitting chip according to the channel enable information or channel acquisition timing configured by the channel feedback control parameters.

[0097] In step S220, the undervoltage feedback signal of the corresponding light-emitting chip is obtained through each signal feedback channel, and the voltage feedback data of each signal feedback channel is obtained.

[0098] After establishing at least two signal feedback channels with each light-emitting chip, the backlight driving circuit 1210 can obtain the undervoltage feedback signal of the corresponding light-emitting chip through each signal feedback channel and obtain the voltage feedback data of each signal feedback channel.

[0099] For example, please see again Figure 5 The signal feedback channel may include a first signal feedback channel, a second signal feedback channel, and a third signal feedback channel; under the control of the channel feedback control parameters, the backlight driving circuit 1210 first collects the undervoltage feedback signal of the red-emitting chip through channels 1, 4, 7, and 10, obtains the voltage feedback data of the first signal feedback channel, and sends the voltage feedback data of the first signal feedback channel to the control module 1300, so that the control module 1300 can determine whether the red-emitting chip is undervoltage and perform corresponding voltage control.

[0100] Then, under the control of the channel feedback control parameters, the backlight driving circuit 1210 can collect the undervoltage feedback signal of the green light-emitting chip through channels 2, 5, 8 and 11 to obtain the voltage feedback data of the second signal feedback channel, and send the voltage feedback data of the second signal feedback channel to the control module 1300 so that the control module 1300 can determine whether the green light-emitting chip is undervoltage and perform corresponding voltage control.

[0101] Finally, under the control of the channel feedback control parameters, the backlight driving circuit 1210 can collect the undervoltage feedback signal of the blue light-emitting chip through channels 3, 6, 9 and 12 to obtain the voltage feedback data of the third signal feedback channel, and send the voltage feedback data of the third signal feedback channel to the control module 1300 so that the control module 1300 can determine whether the blue light-emitting chip is undervoltage and perform corresponding voltage control.

[0102] The above technical solution has the following advantages or effects: By configuring a feedback control element in the backlight driving circuit and storing the method for controlling the backlight driving circuit to establish signal feedback channels with each light-emitting chip, the channel feedback control parameters can be preset or updated using the feedback control element. This allows for flexible adjustment of the method for establishing signal feedback channels between the backlight driving circuit and multiple light-emitting units using the channel feedback control parameters, as well as the timing of acquiring the undervoltage feedback signal of the light-emitting chip through each signal feedback channel. This enables parameterized control of the feedback channels and achieves the beneficial effect of more comprehensive and orderly coverage of undervoltage monitoring of all light-emitting chips.

[0103] In one exemplary embodiment, each signal feedback channel includes multiple signal connection channels between multiple light-emitting chips of the same color channel and the backlight driving circuit.

[0104] In a specific implementation, the signal feedback channel may include a first signal feedback channel, a second signal feedback channel, and a third signal feedback channel; wherein, the first signal feedback channel is the signal connection channel between the backlight driving circuit 1210 and the red-emitting chip, i.e. Figure 2 Channels 1, 4, 7, and 10 are shown; the second signal feedback channel is the signal connection channel between the backlight driving circuit 1210 and the green-emitting chip, i.e. Figure 2 Channels 2, 5, 8, and 11 are shown; the third signal feedback channel is the signal connection channel between the backlight driving circuit 1210 and the blue-emitting chip, i.e. Figure 2 Channels 3, 6, 9 and 12 are shown.

[0105] The above technical solution has the following advantages or effects: By setting each signal feedback channel as multiple signal connection channels between multiple light-emitting chips of the same color channel and the backlight driving circuit, it is possible to effectively take into account that light-emitting chips of the same color channel have similar light-emitting characteristics, voltage requirements and fault modes (for example, red chips may be more prone to undervoltage due to material characteristics). By incorporating multiple light-emitting chips of the same color channel into the same signal feedback channel, it is possible to detect the undervoltage state of multiple light-emitting chips belonging to the same color channel in a single detection and perform unified voltage control, thereby ensuring that the light-emitting state of all light-emitting chips in the same color channel is consistent, effectively improving the color uniformity and reproduction of the displayed image.

[0106] In an exemplary embodiment, when the feedback control element 1212 is a register, the feedback control instruction includes a feedback data packet, such as... Figure 8 As shown, the backlight driving circuit 1210 is configured to perform the following steps S320 to S360. Wherein:

[0107] In step S320, the backlight driving circuit 1210 updates the channel enable configuration data of the register according to the feedback data packet sent by the control module 1300; each channel enable configuration data corresponds to a color channel.

[0108] by Figure 2 For example, the channel enable configuration data for the red channel is 0x0249, which enables feedback for channels 1, 4, 7, and 10; the channel enable configuration data for the green channel is 0x0492, which enables feedback for channels 2, 5, 8, and 11; and the channel enable configuration data for the blue channel is 0x0924, which enables feedback for channels 3, 6, 9, and 12.

[0109] In a specific implementation, when the control module 1300 needs to obtain the status of the backlight driving circuit 1210, the control module 1300 can send a feedback data packet to the backlight driving circuit 1210, so that the backlight driving circuit 1210 configures the channel enable configuration data of the register according to the feedback data packet. For example, when acquiring the undervoltage status of the light-emitting chip in the red channel, the channel enable configuration data of the register is configured to 0x0249.

[0110] In step S340, according to the channel enable configuration data, multiple signal connection channels between multiple light-emitting chips of the same color channel and the backlight driving circuit are enabled simultaneously. The undervoltage feedback signal of the corresponding light-emitting chip is obtained through the multiple signal connection channels to obtain the voltage feedback data of the signal feedback channel corresponding to the color channel.

[0111] In a specific implementation, the backlight driving circuit 1210 can enable multiple signal connection channels between multiple light-emitting chips of the same color channel and the backlight driving circuit according to the channel enable configuration data. It can obtain the undervoltage feedback signal of the corresponding light-emitting chip through the multiple signal connection channels and obtain the voltage feedback data of the signal feedback channel corresponding to the color channel.

[0112] In step S360, the voltage feedback data of the signal feedback channel corresponding to the color channel is sent to the control module.

[0113] In a specific implementation, the backlight driving circuit 1210 can send the voltage feedback data of the signal feedback channel corresponding to the color channel to the control module 1300, so that the control module 1300 can control the operating voltage of the light-emitting chip of the color channel according to the voltage feedback data of the signal feedback channel corresponding to the color channel.

[0114] For example, when the channel enable configuration data is 0x0249, multiple signal connection channels between the backlight driver circuit 1210 and the light-emitting chip, namely channel 1, channel 4, channel 7, and channel 10, are enabled. The backlight driver circuit 1210 collects the undervoltage status of the light-emitting chip (LED_R) corresponding to these signal connection channels through the enabled multiple signal connection channels and reports the undervoltage status of the light-emitting chip (LED_R) corresponding to the signal connection channel to the control module 1300. If the backlight driver circuit 1210 reports a Sick signal, then LED_R is undervoltage, and the control module 1300 will reduce the FB_R feedback voltage to increase the VLED_R voltage of LED_R; if the backlight driver circuit 1210 does not report a Sick signal, it means that LED_R is not undervoltage, and the control module 1300 will increase the FB_R feedback voltage of LED_R to appropriately reduce the VLED_R voltage of LED_R.

[0115] When the channel enable configuration data is 0x0492, multiple signal connection channels between the backlight driver circuit 1210 and the light-emitting chip, namely channels 2, 5, 8, and 11, are enabled. The backlight driver circuit 1210 collects the undervoltage status of the light-emitting chip (LED_G) corresponding to these signal connection channels through the enabled multiple signal connection channels and reports the undervoltage status of the light-emitting chip (LED_G) corresponding to the signal connection channel to the control module 1300. If the backlight driver circuit 1210 reports a Sick signal, then LED_G is undervoltage, and the control module 1300 will reduce the FB_G feedback voltage to increase the VLED_G voltage of LED_G; if the backlight driver circuit 1210 does not report a Sick signal, it means that LED_G is not undervoltage, and the control module 1300 will increase the FB_G feedback voltage of LED_G to appropriately reduce the VLED_G voltage of LED_G.

[0116] When the channel enable configuration data is 0x0924, multiple signal connection channels between the backlight driver circuit 1210 and the light-emitting chip, namely channels 3, 6, 9, and 12, are enabled. The backlight driver circuit 1210 collects the undervoltage status of the light-emitting chip (LED_B) corresponding to these signal connection channels through the enabled multiple signal connection channels and reports the undervoltage status of the light-emitting chip (LED_B) corresponding to the signal connection channel to the control module 1300. If the backlight driver circuit 1210 reports a Sick signal, then LED_B is undervoltage, and the control module 1300 reduces the FB_B feedback voltage, increasing the VLED_B voltage of LED_B; if the backlight driver circuit 1210 does not report a Sick signal, it indicates that LED_B is not undervoltage, and the control module 1300 increases the FB_B feedback voltage of LED_B, appropriately reducing the VLED_B voltage of LED_B. In practical applications, the signal diagram of the voltage feedback data of the signal feedback channels corresponding to each color channel can be shown as follows: Figure 9 As shown.

[0117] To facilitate understanding by those skilled in the art, the following explains the working principle of enabling channels 1, 4, 7, and 10 when the channel enable configuration data is 0x0249:

[0118] Channel enable configuration data 0x0249 (corresponding to LED_R, channels 1, 4, 7, 10)

[0119] Hexadecimal splitting of 0x0249: 0x0249 = 0x0 (high byte) + 0x2 + 0x4 + 0x9 (lower 3 Hex bits, corresponding to lower 12 Bin bits);

[0120] Convert to binary (lower 12 bits):

[0121] 0x2→0010 (Bit7~Bit4, because the second Hex bit corresponds to Bit7~Bit4)

[0122] 0x4 → 0100 (Bit 11 ~ Bit 8, because the first Hex bit corresponds to Bit 11 ~ Bit 8)

[0123] 0x9 → 1001 (Bit 3 ~ Bit 0, because the 0th Hex bit corresponds to Bit 3 ~ Bit 0)

[0124] The lower 12 bits after combination are: 010000101001 (Bit 11~Bit 0)

[0125] Find the position of "1" → corresponding channel:

[0126] The binary bits are counted from right to left (Bit0 = bit 1, Bit1 = bit 2 ... Bit11 = bit 12):

[0127] Bit0=1 → Channel 1

[0128] Bit3 = 1 → Channel 4 (Bit3 = 4th bit)

[0129] Bit6 = 1 → Channel 7 (Bit6 = 7th bit)

[0130] Bit9 = 1 → Channel 10 (Bit9 = 10th bit)

[0131] Finally, enable channels 1, 4, 7, and 10, corresponding to the LED_R light-emitting chip in the red channel.

[0132] The above technical solution has the following advantages or effects: By using the mature hardware memory of registers as the feedback control element, and taking advantage of the simple read and write operation and fast response speed of registers, it can effectively adapt to high-frequency configuration updates. Furthermore, by using feedback data packets as a standardized control command format, the communication logic between the control module and the backlight driving circuit can be made more standardized, and no complex protocol parsing is required. This enables the control module to quickly and accurately obtain the undervoltage feedback status of the light-emitting chips of each color channel, thereby improving the stability and reliability of the backlight feedback system.

[0133] In one exemplary embodiment, each signal feedback channel is a signal feedback channel between a light-emitting chip and a backlight driving circuit.

[0134] In practical implementation, each signal feedback channel can also be set as a signal feedback channel between the light-emitting chip and the backlight driving circuit, such as... Figure 2 As shown, the signal feedback channel can sequentially include: Figure 2 The signals are categorized into channels 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12. Specifically, the voltage feedback data for each signal feedback channel can include the undervoltage feedback signal of the LED corresponding to channel 1; channel 2; channel 3; channel 4; channel 5; channel 6; channel 7; channel 8; channel 9; channel 10; channel 11; and channel 12.

[0135] The above technical solution has the following advantages or effects: by setting a signal feedback channel as a signal feedback channel between a light-emitting chip and a backlight driving circuit, the backlight driving circuit can directly obtain the independent undervoltage feedback signal of a single light-emitting chip, rather than the grouped or color channel-level aggregated signal, which effectively improves the precision of the control module in obtaining the undervoltage state of each light-emitting chip, thereby enabling the control module to more accurately locate the voltage abnormality of a specific light-emitting chip.

[0136] In an exemplary embodiment, when the feedback control element 1212 is a delay module, the feedback control command includes brightness data, such as... Figure 10 As shown, the backlight driving circuit 1210 is configured to perform the following steps S420 to S440. Wherein:

[0137] In step S420, the backlight driving circuit responds to the brightness data sent by the control module and, according to the delay time configured by the delay module, sequentially obtains the undervoltage feedback signal of the corresponding light-emitting chip through each signal feedback channel.

[0138] In specific implementation, such as Figure 11 As shown, the control module 130 sends brightness data to the backlight driver circuit 1210 and sets the FB voltage adjustment range. After receiving the brightness data, the backlight driver circuit 1210 starts to calculate feedback parameters for each channel individually and generates undervoltage feedback signals for each channel. If the light-emitting chip connected to a certain channel is undervoltage, a Sick signal is reported and a low level is output; if the channel is not undervoltage, no Sick signal is reported and a high level is output.

[0139] In practical applications, the display device has multiple backlight driving circuits 1210. First, all channels 1 of the backlight driving circuits 1210 of the display device start to determine whether there is undervoltage and generate feedback signal 1. At this time, if any channel 1 of the backlight driving circuit 1210 is undervoltage, a sick signal is reported; otherwise, no sick signal is reported. Then, after a delay of t, all channels 2 of the backlight driving circuits 1210 start to determine whether there is undervoltage and generate feedback signal 2. After another delay of t, all channels 3 of the Driver IC start to determine whether there is undervoltage and generate feedback signal 3. This process continues for a delay of t until all channels generate feedback signals.

[0140] In step S440, the backlight driving circuit 1210 sequentially sends the undervoltage feedback signals of each signal feedback channel to the control module 1300.

[0141] In specific implementation, after the control module 130 receives undervoltage feedback signals from all channels of the backlight driving circuit 1210, the control module 130 determines which channels of the backlight driving circuit 1210 reported a Sick signal and begins to analyze the undervoltage status of VLED_R, VLED_G, and VLED_B. Based on the undervoltage status of the light-emitting chip, a corresponding PWM control signal is output to reduce the FB feedback voltage of the light-emitting chip and adjust the power supply module corresponding to the light-emitting chip, thereby increasing the VLED voltage of the light-emitting chip. If the light-emitting chip does not report undervoltage, the FB feedback voltage of the light-emitting chip is increased, and the power supply module corresponding to the light-emitting chip is adjusted, thereby decreasing the VLED voltage of the light-emitting chip.

[0142] Taking a 12-channel backlight driving circuit as an example, such as Figure 2 As shown, each channel connects to one LED. LED_R uses channels 1, 4, 7, and 10; LED_G uses channels 2, 5, 8, and 11; and LED_B uses channels 3, 6, 9, and 12. Assume the feedback signals of all channels in the backlight driver circuit are as follows: Figure 12 As shown, after receiving the signal, the control module 130 analyzes the channels reporting "sick" as follows: channels 1, 2, 5, 7, 8, and 11. Channels 1 and 7 reporting "sick" indicate that two sections of LED_R are undervoltage. The control module 130 sends a PWM control signal to reduce the FB_R feedback voltage of LED_R, thereby increasing the VLED_R voltage. Channels 2, 5, 8, and 11 all reporting "sick" indicate that all four sections of LED_G are undervoltage. The control module 130 sends a PWM control signal to reduce the FB_G feedback voltage of VLED_G, thereby increasing the VLED_G voltage. The other channels do not report "sick," indicating that all four sections of LED_B are not undervoltage. At this time, the control module 130 sends a PWM control signal to increase the FB_B feedback voltage of LED_B, thereby decreasing the VLED_B voltage of LED_B.

[0143] The above technical solution has the following advantages or effects: By responding to the brightness data sent by the control module, and obtaining the corresponding undervoltage feedback signals of the light-emitting chips in sequence through each signal feedback channel according to the delay time configured by the delay module, and sending the undervoltage feedback signals of each signal feedback channel to the control module in sequence, the undervoltage feedback signals received by the control module from each signal feedback channel can have a clear time sequence correspondence. The control module can directly locate the light-emitting chip in the undervoltage state through the time sequence of the undervoltage feedback signals and the corresponding channel number, effectively simplifying the data parsing logic of the control module for voltage feedback data and improving the data parsing efficiency of the control module for voltage feedback data.

[0144] In one exemplary embodiment, such as Figure 13 As shown, the control module 1300 is configured to execute the following steps S520 to S540. Wherein:

[0145] In step S520, the undervoltage state of at least one light-emitting chip corresponding to the signal feedback channel is determined based on the voltage feedback data of the signal feedback channel.

[0146] In specific implementation, the control module 1300 can determine the undervoltage state of at least one light-emitting chip corresponding to the signal feedback channel based on the voltage feedback data of the signal feedback channel. For example, Figure 12 As shown, after receiving the signal, the control module 130 analyzes that channels 1 and 7 report sick, indicating that the two partitions of LED_R are undervoltage; channels 2, 5, 8 and 11 all report sick, indicating that the four partitions of LED_G are undervoltage; other channels do not report sick, indicating that the four partitions of LED_B are not undervoltage.

[0147] In step S540, based on the undervoltage state of at least one light-emitting chip, the feedback voltage parameter corresponding to at least one light-emitting chip is increased or decreased to adjust the operating voltage provided by the backlight driving circuit to at least one light-emitting chip.

[0148] In practice, for a light-emitting chip in an undervoltage state, the control module can reduce the FB feedback voltage of the light-emitting chip. The control module compares the reduced FB feedback voltage with a preset voltage threshold. If the comparison result shows that the FB feedback voltage is lower than the voltage threshold, the control module is triggered to issue a boost command. The control module can adjust the operating parameters of the backlight driving circuit (e.g., increase the PWM duty cycle of the power supply module of the backlight driving circuit) to increase the power output power, thereby increasing the VLED voltage of the light-emitting unit to compensate for the undervoltage state of the light-emitting unit. The adjustment stops when the VLED voltage of the light-emitting unit stabilizes at the target value.

[0149] For LEDs that are not undervoltage, the control module can increase the FB feedback voltage of the LED. The control module compares the increased FB feedback voltage with a preset voltage threshold. If the comparison result shows that the FB feedback voltage is higher than the voltage threshold, the control module is triggered to issue a voltage reduction command. The control module can adjust the operating parameters of the backlight driving circuit (e.g., reduce the PWM duty cycle of the power supply module of the backlight driving circuit) to reduce the power supply output power, thereby reducing the VLED voltage of the LED unit and ensuring that the power supply outputs a stable VLED voltage to the LED.

[0150] The above technical solution has the following advantages or effects: it can effectively shorten the time for the control module to parse voltage feedback data each time, so that the control module (such as the backlight controller, system-on-a-chip, etc.) can use most of its computing resources to accurately determine the working voltage adjustment requirements of the light-emitting chips connected to each signal feedback channel, and adjust the working voltage of each light-emitting chip in a timely manner according to the working voltage adjustment requirements of each light-emitting chip, thereby effectively improving the efficiency of the display device in regulating the working voltage of the light-emitting devices in the backlight module.

[0151] In one exemplary embodiment, such as Figure 14 As shown, a backlight control method is provided, which is applied to... Figure 1 The following description uses the backlight driving circuit as an example, including the following steps S620 to S660. Wherein:

[0152] In step S620, in response to the feedback control command sent by the control module, at least two independent signal feedback channels are established with multiple light-emitting units; each signal feedback channel corresponds to at least one light-emitting chip.

[0153] In a specific implementation, when the control module 1300 includes a backlight control circuit 1310 and a system-on-a-chip 1320, the system-on-a-chip 1320 sends SPI data (including backlight brightness data) to the backlight control circuit 1310. After processing, the backlight control circuit 1310 sends the processed backlight brightness data as a feedback control command to the backlight drive circuit 1210.

[0154] After receiving a feedback control command, the backlight driving circuit 1210 can respond to the feedback control command and establish at least two independent signal feedback channels with each light-emitting chip 1222 in the multiple light-emitting units 1220.

[0155] Step S640: Obtain the undervoltage feedback signal of the corresponding light-emitting chip through each signal feedback channel to obtain the voltage feedback data of each signal feedback channel.

[0156] In a specific implementation, the backlight driving circuit 1210 can collect the undervoltage feedback signal of the light-emitting chip connected to each signal feedback channel through each signal feedback channel according to the preset acquisition timing sequence, and obtain the voltage feedback data of each signal feedback channel.

[0157] Step S660: Send voltage feedback data of each signal feedback channel to the control module, so that the control module adjusts the operating voltage provided to each light-emitting chip by the backlight driving circuit according to the voltage feedback data of each signal feedback channel.

[0158] In the specific implementation, the voltage feedback data of each signal feedback channel is sent to the backlight control circuit 1310 in sequence. After receiving the voltage feedback data of each signal feedback channel, the backlight control circuit 1310 can parse the voltage feedback data of each signal feedback channel in sequence to obtain the undervoltage state of each light-emitting chip. Then, the backlight control circuit 1310 can adjust the operating voltage of the light-emitting chip according to the undervoltage state of each light-emitting chip.

[0159] The technical solution of this embodiment establishes at least two independent signal feedback channels between the backlight driving circuit and multiple light-emitting units by sending feedback control commands to the backlight driving circuit. Voltage feedback data obtained through each signal feedback channel is then sent to the control module. The control module adjusts the operating voltage provided by the backlight driving circuit to each light-emitting chip based on the voltage feedback data from each signal feedback channel. This effectively avoids the backlight driving circuit packaging all undervoltage feedback signals from all light-emitting chips in the backlight module into a complete voltage feedback data set and transmitting it to the control module at once. This effectively reduces the amount of voltage feedback data processed by the control module each time and shortens the time required for parsing the voltage feedback data. This allows the control module (e.g., a backlight controller, system-on-a-chip, etc.) to dedicate most of its computing resources to accurately determining the operating voltage adjustment requirements of the light-emitting chips connected to each signal feedback channel and adjusting the operating voltage of each light-emitting chip in a timely manner according to these requirements. This effectively improves the efficiency of the display device in regulating the operating voltage of the light-emitting devices in the backlight module.

[0160] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0161] Based on the same inventive concept, this application also provides a backlight control device for implementing the backlight control method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more backlight control device embodiments provided below can be found in the limitations of the backlight control method described above, and will not be repeated here.

[0162] In one exemplary embodiment, such as Figure 15 As shown, a backlight control device is provided, comprising:

[0163] The response module 1510 is used to respond to the feedback control command sent by the control module and establish at least two independent signal feedback channels with the plurality of light-emitting units; each signal feedback channel corresponds to at least one light-emitting chip;

[0164] The acquisition module 1520 is used to acquire the undervoltage feedback signal of the corresponding light-emitting chip through each of the signal feedback channels, and obtain the voltage feedback data of each of the signal feedback channels;

[0165] The transmitting module 1530 is used to transmit voltage feedback data from each of the signal feedback channels to the control module, so that the control module adjusts the operating voltage provided by the backlight driving circuit to each of the light-emitting chips according to the voltage feedback data from each of the signal feedback channels. In one embodiment,

[0166] Each module in the aforementioned backlight control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0167] In one embodiment, a computer-readable storage medium is provided, storing a computer program that, when executed by a processor, causes the processor to perform the steps of the backlight control method described above. The steps of the backlight control method described here may be steps from one of the backlight control methods in the various embodiments described above.

[0168] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, causes the processor to perform the steps of the backlight control method described above. The steps of the backlight control method described here may be steps from one of the backlight control methods in the various embodiments described above.

[0169] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0170] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic resistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0171] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0172] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A display device, characterized by comprising: include: Display panel: A backlight module, the backlight module including a backlight driving circuit and a plurality of light-emitting units, each light-emitting unit including a plurality of light-emitting chips, the plurality of light-emitting chips corresponding one-to-one with a plurality of color channels, the backlight driving circuit being electrically connected to the plurality of light-emitting units, the backlight driving circuit being configured to drive each light-emitting chip in each light-emitting unit to emit light respectively. The control module is connected to both the display panel and the backlight driving circuit. The control module is configured as follows: A feedback control command is sent to the backlight driving circuit, causing the backlight driving circuit to enable at least two independent signal feedback channels according to stored channel feedback control parameters, and sequentially send the voltage feedback data of each signal feedback channel to the control module; the signal feedback channel includes a signal connection channel between the backlight driving circuit and at least one of the light-emitting units; the signal connection channel is used to transmit the undervoltage feedback signal of the corresponding light-emitting unit; the channel feedback control parameters are used to control the way the backlight driving circuit enables the signal feedback channel; each voltage feedback data includes the undervoltage feedback signal of at least one light-emitting chip corresponding to the corresponding signal feedback channel; Based on the voltage feedback data of each of the signal feedback channels, the operating voltage provided by the backlight driving circuit to each of the light-emitting chips is adjusted.

2. The display device of claim 1, wherein, The backlight driving circuit includes a feedback control element electrically connected to the control module, and the backlight driving circuit is configured as follows: According to the channel feedback control parameters stored in the feedback control element, at least two signal feedback channels are established with each of the light-emitting chips respectively; the channel feedback control parameters are used to control the way in which the backlight driving circuit establishes the signal feedback channels with each of the light-emitting chips respectively; The undervoltage feedback signal of the corresponding light-emitting chip is obtained through each of the signal feedback channels, and the voltage feedback data of each of the signal feedback channels is obtained.

3. The display device of claim 2, wherein, Each of the signal feedback channels includes multiple signal connection channels between the multiple light-emitting chips of the same color channel and the backlight driving circuit.

4. The display device of claim 3, wherein, When the feedback control element is a register, the feedback control instruction includes a feedback data packet, and the backlight driving circuit is configured as follows: The channel enable configuration data of the register is updated according to the feedback data packet sent by the control module; each channel enable configuration data corresponds to one of the color channels; According to the channel enable configuration data, enable multiple signal connection channels between multiple light-emitting chips of the same color channel and the backlight driving circuit, obtain the undervoltage feedback signal of the corresponding light-emitting chip through the multiple signal connection channels, and obtain the voltage feedback data of the signal feedback channel corresponding to the color channel. The voltage feedback data of the signal feedback channel corresponding to the color channel is sent to the control module.

5. The display device of claim 2, wherein, Each of the signal feedback channels is a signal feedback channel between the light-emitting chip and the backlight driving circuit.

6. The display device according to claim 5, characterized in that, When the feedback control element is a delay module, the feedback control command includes backlight brightness data, and the backlight driving circuit is configured as follows: In response to the backlight brightness data sent by the control module, the undervoltage feedback signal of the corresponding light-emitting chip is obtained sequentially through each of the signal feedback channels according to the delay time configured by the delay module. The undervoltage feedback signals of each of the signal feedback channels are sent sequentially to the control module.

7. The display device according to claim 1, characterized in that, The control module is configured as follows: Based on the voltage feedback data of the signal feedback channel, determine the undervoltage state of at least one light-emitting chip corresponding to the signal feedback channel; Based on the undervoltage state of the at least one light-emitting chip, the feedback voltage parameter corresponding to the at least one light-emitting chip is increased or decreased to adjust the operating voltage provided by the backlight driving circuit to the at least one light-emitting chip.

8. A backlight control method, characterized in that, The method, applied to the backlight driving circuit of the display device as described in any one of claims 1 to 7, comprises: In response to the feedback control command sent by the control module, at least two independent signal feedback channels are enabled according to the stored channel feedback control parameters; each signal feedback channel corresponds to at least one light-emitting chip; the channel feedback control parameters are used to control the way the backlight driving circuit enables the signal feedback channels; The undervoltage feedback signal of the corresponding light-emitting chip is obtained through each of the signal feedback channels, and the voltage feedback data of each of the signal feedback channels is obtained. The control module sends voltage feedback data from each of the signal feedback channels sequentially, so that the control module adjusts the operating voltage provided by the backlight driving circuit to each of the light-emitting chips according to the voltage feedback data from each of the signal feedback channels.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the method of claim 8.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method of claim 8.

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