Drive control circuit, control panel and display device

Abstract

This application discloses a drive control circuit, a control board, and a display device. The drive control circuit includes a data interface, a local dimming module, and a control module. The data interface is connected to the motherboard and the logic board to receive a first drive signal or a second drive signal. The local dimming module is connected to the motherboard to receive the original backlight signal from the motherboard and performs local dimming processing on the original backlight signal to obtain a third drive signal. The control module is connected to the data interface and the local dimming module to convert the first drive signal, the second drive signal, or the third drive signal into a backlight control signal. The backlight control signal is used to control the operation of the backlight driver board. In the drive control circuit of this application, the motherboard, the logic board, and the local dimming module can all perform local dimming control, achieving multi-scheme compatibility, high flexibility, reducing dependence on the logic board, and making the selection of the board more flexible.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a drive control circuit, a control board, and a display device. Background Technology

[0002] Local dimming is a backlighting technology used in televisions and monitors to improve image contrast and quality. Its basic principle is to divide the backlight into multiple independently controllable areas or blocks, each of which can adjust its brightness independently according to the needs of the displayed content; for example, brightness can be reduced in areas where deep blacks are needed, while brightness can be increased in areas where bright details are needed, thus achieving a better visual effect.

[0003] In related technologies, local dimming algorithms are processed through logic boards, also known as TCON (Timing Controller) boards. However, since the logic board needs to perform local dimming control, there are certain requirements for the performance and interface of the logic board, resulting in a high dependence on the logic board and a relatively simple implementation scheme. Utility Model Content

[0004] In view of the above problems, this application provides a drive control circuit, a control board, and a display device to solve the above technical problems.

[0005] In a first aspect, this application provides a drive control circuit, the drive control circuit comprising:

[0006] A data interface is used to connect the motherboard and the logic board to receive a first driving signal or a second driving signal; wherein the first driving signal is a signal obtained by the motherboard after performing local dimming processing on the original backlight signal, and the second driving signal is a signal obtained by the logic board after performing local dimming processing on the original backlight signal.

[0007] The local dimming module is used to connect to the motherboard to receive the original backlight signal from the motherboard and perform local dimming processing on the original backlight signal to obtain the third drive signal.

[0008] The control module is used to connect the data interface and the local dimming module to convert the first drive signal, the second drive signal, or the third drive signal into a backlight control signal; wherein the backlight control signal is used to control the operation of the backlight driver board.

[0009] In one possible implementation of this application, the drive control circuit further includes a first display interface; the first display interface is used to connect the motherboard and the local dimming module to receive and transmit a first display control signal from the motherboard; the local dimming module is used to obtain the original backlight signal according to the first display control signal, and to perform local dimming processing on the original backlight signal to obtain a third drive signal.

[0010] In one possible implementation of this application, the drive control circuit further includes a display conversion module; the display conversion module is used to connect the motherboard and the local dimming module to receive a second display control signal from the motherboard and convert the second display control signal into a third display control signal to be output to the local dimming module; wherein the signal format of the second display control signal is different from the signal format of the first display control signal, and the signal format of the third display control signal is the same as the signal format of the first display control signal; the local dimming module is used to obtain the original backlight signal according to the third display control signal and perform local dimming processing on the original backlight signal to obtain the third drive signal.

[0011] In one possible implementation of this application, the drive control circuit further includes a second display interface; the second display interface is used to connect the local dimming module and the logic board to transmit the first image display signal from the local dimming module to the logic board, so that the logic board can control the display screen to display an image according to the first image display signal; wherein, the first image display signal is the signal obtained by the local dimming module after performing local dimming processing on the original display signal.

[0012] In one possible implementation of this application, the drive control circuit further includes a power interface and a power conversion module; the power interface is used to connect to the motherboard and the power conversion module to transmit the power voltage signal from the motherboard to the power conversion module; the power conversion module is used to connect the local dimming module and the control module to obtain a first voltage signal and a second voltage signal based on the power voltage signal; wherein the first voltage signal is used to power the local dimming module and the second voltage signal is used to power the control module.

[0013] In one possible implementation of this application, the drive control circuit further includes a backlight enable interface, a backlight power interface, and a backlight drive interface; the backlight enable interface is used to connect the motherboard, the local dimming module, and the backlight power interface to receive and transmit a backlight enable signal or a backlight adjustment signal from the motherboard; the backlight power interface is used to connect the backlight drive interface and the backlight power board to transmit the backlight power signal of the backlight power board to the backlight drive interface in response to the backlight enable signal or the backlight adjustment signal; the backlight drive interface is used to connect the backlight drive board to output the backlight power signal and the backlight control signal to the backlight drive board.

[0014] Secondly, this application also provides a control board that includes the drive control circuitry in any possible implementation of the first aspect.

[0015] Thirdly, this application also provides a display device, which includes a device body and a drive control circuit or a control board disposed in any possible implementation of the first aspect or the second aspect of the device body.

[0016] In one possible implementation of this application, the display device further includes a motherboard, a logic board, and a display screen connected to the logic board, all of which are connected to the drive control circuit. The motherboard is connected to the logic board to output a second image display signal to the logic board, so that the logic board can control the display screen to display an image according to the second image display signal. The second image display signal is a signal obtained by the motherboard after performing local dimming processing on the original display signal.

[0017] In one possible implementation of this application, the display device further includes a motherboard, a logic board, and a display screen connected to the logic board, all of which are connected to the drive control circuit. The motherboard is connected to the logic board to output a fourth display control signal to the logic board. The logic board is used to obtain an original display signal based on the fourth display control signal, and to perform local dimming processing on the original display signal to obtain a third image display signal, which is then output to the display screen so that the display screen displays an image based on the third image display signal.

[0018] From the above, it can be concluded that this application has the following beneficial effects:

[0019] In this application, the system connects to the motherboard and logic board via data interfaces, respectively, and receives a first drive signal processed by the motherboard's local dimming or a second drive signal processed by the logic board's local dimming. Furthermore, a third drive signal can be obtained by locally dimming the original backlight signal through a local dimming module. This allows the control module to convert the first, second, or third drive signals into backlight control signals, thereby achieving backlight control. Compared to related technologies where only the logic board implements local dimming control, in this application, the motherboard, logic board, and local dimming module can all perform local dimming control, achieving multi-solution compatibility, high flexibility, reduced dependence on the logic board, and more flexible board selection. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an architecture for implementing local dimming control using a TCON board in related technologies;

[0022] Figure 2 This is a schematic diagram of an application scenario of the drive control circuit provided in the embodiments of this application;

[0023] Figure 3This is a schematic diagram of the first structure of the drive control circuit provided in the embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the second structure of the drive control circuit provided in the embodiments of this application;

[0025] Figure 5 This is a schematic diagram of the third structure of the drive control circuit provided in the embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the fourth structure of the drive control circuit provided in the embodiments of this application;

[0027] Figure 7 This is a schematic diagram of the fifth structure of the drive control circuit provided in the embodiments of this application;

[0028] Figure 8 This is a schematic diagram of the sixth structure of the drive control circuit provided in the embodiments of this application;

[0029] Figure 9 This is a schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] To enable those skilled in the art to better understand the solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] In the embodiments of this application, it should be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0033] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0034] In the description of the embodiments of this application, the words "example" or "for example" are used to indicate exemplification, illustration, or description. Any embodiment or design described as "example" or "for example" in the embodiments of this application is not to be construed as being more preferred or having more advantages than another embodiment or design. The use of the words "example" or "for example" is intended to present relative concepts in a clear manner.

[0035] Furthermore, in the embodiments of this application, "multiple" refers to two or more. Therefore, in the embodiments of this application, "multiple" can also be understood as "at least two". "At least one" can be understood as one or more, such as one, two, or more. For example, including at least one means including one, two, or more, and is not limited to which ones are included. For example, including at least one of A, B, and C, then it could include A, B, C, A and B, A and C, B and C, or A and B and C.

[0036] It should be noted that in the embodiments of this application, "connection" can be understood as electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0037] Before introducing the drive control circuit, control board, and display device of this application, we will first introduce the relevant background information of the embodiments of this application.

[0038] In related technologies, backlight local dimming control is usually achieved by combining a TCON board with an MCU (Microcontroller Unit).

[0039] Reference Figure 1The TCON board receives display signals from the motherboard (not shown in the figure), extracts display data and backlight data from the display signals, and performs local dimming processing on the extracted data to obtain display control data and backlight control data. Then, the display control data is transmitted to the display screen for image display, and the backlight control data is transmitted to the MCU via the SPI (Serial Peripheral Interface) bus. After conversion by the MCU, it is transmitted to the backlight driver chip via the SPI bus. Finally, the backlight driver signal is used to control the backlight of the display screen.

[0040] This method of local dimming control using a TCON board requires that the performance and interface of the selected TCON board meet relevant requirements, resulting in a high dependence on the TCON board, a limited number of TCON board types to choose from, and a relatively simple implementation scheme.

[0041] Based on this, the embodiments of this application provide a driving control circuit, a control board, and a display device. The driving control circuit is compatible with multiple local dimming implementation methods, reducing the dependence on the TCON board. Users can select any local dimming implementation method for backlight control according to the actual application scenario, which is highly flexible.

[0042] The drive control circuit, control board, and display device provided in this application will be described in detail below.

[0043] First, embodiments of this application provide a drive control circuit, such as... Figure 2 As shown, Figure 2 This is a schematic diagram of an application scenario of the drive control circuit provided in the embodiments of this application. The drive control circuit 100 can be integrated on the control board 10 of the display device and cooperate with the main board 20, logic board 30 and backlight driver board 40 of the display device to realize backlight control of the display screen 50.

[0044] In this embodiment of the application, the motherboard 20 can perform local dimming processing on the signal. For example... Figure 2 As shown by the red arrow, the motherboard 20 outputs the first driving signal obtained after local dimming to the driving control circuit 100. The driving control circuit 100 converts the first driving signal into a backlight control signal and outputs it to the backlight driver board 40. The backlight driver board 40 then controls the backlight of the display screen 50 according to the backlight control signal. At the same time, the motherboard 20 also outputs the second image display signal obtained after local dimming to the logic board 30. The logic board 30 controls the display screen 50 to display images according to the second image display signal.

[0045] Logic board 30 can also perform local dimming processing on signals. For example... Figure 2As shown by the blue arrow, the logic board 30 receives the display control signal from the motherboard 20, extracts the original display signal and the original backlight signal from the display control signal, performs local dimming processing on the extracted signal, and obtains the corresponding drive signal, which is output to the drive control circuit 100. The drive control circuit 100 converts the drive signal into a backlight control signal and outputs it to the backlight driver board 40. The backlight driver board 40 then controls the backlight of the display screen 50 according to the backlight control signal. At the same time, the logic board 30 controls the display screen 50 to display an image according to the image display signal corresponding to the original display signal.

[0046] The drive control circuit 100 can also perform local dimming processing on the signal. For example... Figure 2 As shown by the green arrow, the drive control circuit 100 receives the display control signal from the motherboard 20, extracts the original display signal and the original backlight signal from the display control signal, performs local dimming processing and conversion on the signal, and outputs the backlight control signal to the backlight driver board 40. The backlight driver board 40 then performs backlight control on the display screen 50 according to the backlight control signal. At the same time, the drive control circuit 100 also outputs the image display signal obtained after local dimming processing to the logic board 30, so that the logic board 30 controls the display screen 50 to display an image according to the image display signal.

[0047] Understandably, the display device can be an interactive smart panel, a large display screen, an electronic whiteboard, a digital signage, an automotive display screen, or other electronic devices.

[0048] Please see Figure 3 , Figure 3 This is a schematic diagram of a first structural embodiment of the drive control circuit provided in this application. The drive control circuit 100 may include a data interface 110, a local dimming module 120, and a control module 130. The data interface 110 can be used to connect the motherboard 20 and the logic board 30 to receive a first drive signal or a second drive signal; wherein the first drive signal is a signal obtained by the motherboard 20 after performing local dimming processing on the original backlight signal, and the second drive signal is a signal obtained by the logic board 30 after performing local dimming processing on the original backlight signal; the local dimming module 120 can be used to connect to the motherboard 20 to receive the original backlight signal from the motherboard 20 and perform local dimming processing on the original backlight signal to obtain a third drive signal; the control module 130 can be used to connect the data interface 110 and the local dimming module 120 to convert the first drive signal, the second drive signal, or the third drive signal into a backlight control signal; wherein the backlight control signal is used to control the operation of the backlight driver board 40.

[0049] In this embodiment, the motherboard 20 can perform local dimming processing on the original backlight signal to obtain a first drive signal output to the data interface 110; the logic board 30 can also perform local dimming processing on the original backlight signal to obtain a second drive signal output to the data interface 110. It can be understood that the original backlight signal processed by the logic board 30 can be a signal extracted from the display control signal output from the motherboard 20 to the logic board 30.

[0050] The data interface 110 can adopt any existing serial or parallel data interface. The serial data interface includes, but is not limited to, SPI interface, I2C (Inter-Integrated Circuit) interface, UART (Universal Asynchronous Receiver Transmitter) interface, DSI (Display Serial Interface) and LVDS (Low Voltage Differential Signaling) interface. The parallel data interface includes, but is not limited to, parallel 8-bit / 16-bit interface and RGB interface. The specific interface can be determined according to the actual application scenario and is not limited here.

[0051] After receiving the first drive signal or the second drive signal, the data interface 110 can transmit the first drive signal or the second drive signal to the control module 130.

[0052] In this embodiment, the motherboard 20 can also send the original backlight signal to the local dimming module 120, which performs local dimming processing on the received original backlight signal to obtain a third driving signal that is output to the control module 130. The local dimming module 120 can be implemented using an algorithm control chip that integrates readily available local dimming algorithms.

[0053] The control module 130 can be implemented using any existing MCU. This control module 130 can receive a third drive signal from the local dimming module 120 or a first or second drive signal from the data interface 110. Understandably, users can choose the motherboard 20, logic board 30, or local dimming module 120 to implement local dimming control according to actual needs. Therefore, the drive signal received by the control module 130 can be one of the first, second, or third drive signals.

[0054] After receiving the corresponding drive signal, the control module 130 can convert the drive signal into a backlight control signal that the backlight driver board 40 can recognize and process, and output it to the backlight driver board 40 so that the backlight driver board 40 can control the backlight of the display screen 50 according to the received backlight control signal.

[0055] It is worth noting that the local dimming algorithm used by the motherboard 20, logic board 30 and local dimming module 120 in this application embodiment to perform local dimming processing on the signal can be implemented by any one or more existing local dimming algorithms, such as full array local dimming algorithm, edge local dimming algorithm, Miniled local dimming algorithm, etc. This application embodiment does not involve any improvement to the algorithm.

[0056] In this embodiment, the data interface 110 is connected to the motherboard 20 and the logic board 30 respectively, and receives the first drive signal after local dimming processing by the motherboard 20 or the second drive signal after local dimming processing by the logic board 30. Furthermore, the original backlight signal can be locally dimmed by the local dimming module 120 to obtain a third drive signal, so that the control module 130 can convert the first drive signal, the second drive signal or the third drive signal into a backlight control signal to realize backlight control. Compared with the related technology where only the logic board realizes local dimming control, in this application, the motherboard 20, the logic board 30 and the local dimming module 120 can all perform local dimming control, realizing multi-solution compatibility, strong flexibility, reducing dependence on the logic board 30, and making the selection of the board more flexible.

[0057] Next, continue with Figure 3 The unit modules shown are described in detail, as well as the specific implementation methods that may be used in practical applications.

[0058] like Figure 4 As shown, in some embodiments of this application, the drive control circuit 100 may further include a first display interface 140; the first display interface 140 may be used to connect the motherboard 20 and the local dimming module 120 to receive and transmit a first display control signal from the motherboard 20; the local dimming module 120 may be used to obtain the original backlight signal according to the first display control signal, and perform local dimming processing on the original backlight signal to obtain a third drive signal.

[0059] In this embodiment of the application, the first display interface 140 can be any existing video signal transmission interface, such as VBO (V-by-One) interface, DP (Display Port) interface, HDMI (High-Definition Multimedia Interface), etc.

[0060] Since the VBO interface is a Gb-level serialized interface dedicated to video signal transmission, it can convert up to 40 bits / pixel image data into a pair of differential signals, significantly reducing the number of transmission lines required. This effectively saves on the cost of cables and connectors, slimming down the signal transmission system of the device and reducing the overall system cost by saving on cables, connectors, and anti-EMI components. Therefore, the first display interface 140 in this embodiment is preferably a VBO interface.

[0061] The motherboard 20 transmits the first display control signal to the local dimming module 120 through the first display interface 140. The local dimming module 120 extracts the original backlight signal from the first display control signal according to the agreed communication protocol, and performs local dimming processing on the original backlight signal using the integrated local dimming algorithm, thereby obtaining the third drive signal output to the control module 130.

[0062] Understandably, if the first display interface 140 is a VBO interface, then the first display control signal can be a VBO signal. The local dimming module 120 can be configured with a corresponding VBO interface, so that after receiving the first display control signal, it can be processed directly. This not only reduces transmission lines but also optimizes the signal processing flow and improves backlight control efficiency.

[0063] like Figure 5 As shown, in some embodiments of this application, the drive control circuit 100 may further include a display conversion module 150; the display conversion module 150 may be used to connect the motherboard 20 and the local dimming module 120 to receive a second display control signal from the motherboard 20 and convert the second display control signal into a third display control signal and output it to the local dimming module 120; wherein, the signal format of the second display control signal is different from the signal format of the first display control signal, and the signal format of the third display control signal is the same as the signal format of the first display control signal; the local dimming module 120 may be used to obtain the original backlight signal according to the third display control signal and perform local dimming processing on the original backlight signal to obtain the third drive signal.

[0064] Typically, each component needs to be consistent with the display data interface of the motherboard 20 in order to receive and process the display control signals output by the motherboard 20. For example, if the display data interface configured on the motherboard 20 is a VBO interface, then the drive control circuit 100 also needs to be configured with a VBO interface to adapt to the interface of the motherboard 20. Alternatively, if the display data interface of the local dimming module 120 is fixed, then a motherboard compatible with that display data interface needs to be selected, which imposes certain limitations on the selection of the motherboard and results in poor compatibility and flexibility.

[0065] Therefore, in order to improve the compatibility and flexibility of the solution, the drive control circuit 100 in this embodiment of the application also includes a display conversion module 150. The display conversion module 150 can convert the second display control signal from the motherboard into a third display control signal adapted to the local dimming module 120. Thus, the local dimming module 120 can process the third display control signal, extract the original backlight signal from it, and perform local dimming processing to obtain the corresponding third drive signal.

[0066] In this embodiment, when the display data interface of the local dimming module 120 is, for example, a VBO interface, the motherboard 20 does not need to be selected as a model with a VBO interface. Even if the interface of the motherboard 20 is a DP interface, HDMI interface, or USB Type-C interface, the display conversion module 150 can convert the second display control signal from the motherboard 20 into a third display control signal that is compatible with the VBO interface and output it to the local dimming module 120.

[0067] The display conversion module 150 can integrate various existing signal conversion chips, including but not limited to DP to VBO chips, HDMI to VBO chips, and USB Type-C to VBO chips, so as to convert the received display control signals of different signal formats into VBO signals adapted to the local dimming module 120.

[0068] For example, the motherboard 20 is connected to the display conversion module 150 via the DP interface. The second display control signal output is a DP signal. The DP to VBO chip in the display conversion module 150 converts the DP signal into a VBO signal (the third display control signal) and outputs it to the local dimming module 120 for subsequent processing.

[0069] Similarly, if the motherboard 20 is connected to the display conversion module 150 via the HDMI interface, the output second display control signal is an HDMI signal. The HDMI to VBO chip in the display conversion module 150 converts the HDMI signal into a VBO signal (the third display control signal) and outputs it to the local dimming module 120 for subsequent processing.

[0070] In this embodiment, the drive control circuit 100 converts the display control signals of different signal formats output by the motherboard 20 through the display conversion module 150 to obtain a third display control signal that is compatible with the local dimming module 120. This can be compatible with motherboards with different display data interfaces, improving motherboard compatibility and selection flexibility.

[0071] like Figure 6As shown, in some embodiments of this application, the drive control circuit 100 may further include a second display interface 160; the second display interface 160 may be used to connect the local dimming module 120 and the logic board 30 to transmit the first image display signal from the local dimming module 120 to the logic board 30, so that the logic board 30 can control the display screen 50 to display images according to the first image display signal; wherein, the first image display signal is the signal obtained by the local dimming module 120 after performing local dimming processing on the original display signal.

[0072] In this embodiment, the second display interface 160 can also be any existing video signal transmission interface, such as VBO, DP, HDMI, etc. Similarly, based on the advantages of the VBO interface, the second display interface 160 is preferably a VBO interface.

[0073] The local dimming module 120 can extract not only the original backlight signal from the received display control signal, but also the original display signal. It can then perform local dimming processing on the original display signal to obtain a first image display signal, which is output to the logic board 30 via the second display interface 160. This allows the logic board 30 to control the display screen 50 to display an image based on the first image display signal.

[0074] In other words, when the local dimming module 120 is selected for local dimming control, it can generate a third driving signal output to the control module 130. The control module 130 converts the third driving signal into a backlight control signal and outputs it to the backlight driver board 40. The backlight driver board 40 then controls the backlight of the display screen 50 according to the backlight control signal. At the same time, it also generates a first image display signal output to the logic board 30 via the second display interface 160, so that the logic board 30 can control the display screen 50 to display images according to the first image display signal.

[0075] like Figure 7 As shown, in some embodiments of this application, the drive control circuit 100 may further include a power interface 170 and a power conversion module 180; the power interface 170 may be used to connect to the motherboard 20 and the power conversion module 180 to transmit the power voltage signal from the motherboard 20 to the power conversion module 180; the power conversion module 180 may be used to connect the local dimming module 120 and the control module 130 to obtain a first voltage signal and a second voltage signal according to the power voltage signal; wherein, the first voltage signal is used to power the local dimming module 120 and the second voltage signal is used to power the control module 130.

[0076] In this embodiment, the power conversion module 180 can be implemented using any one or more existing DC-DC voltage converters, including but not limited to non-isolated DC-DC converters such as Buck converters, Boost converters, and Buck-Boost converters; isolated DC-DC converters such as Flyback converters, Forward converters, Push-Pull converters, and half-bridge / full-bridge converters; and special types of DC-DC converters such as charge pumps and low-dropout linear regulators. The specific type can be determined according to the actual application scenario and is not limited here.

[0077] The power output terminal of the motherboard 20 is connected to the power interface 170, which receives and transmits the power voltage signal from the motherboard 20. The power conversion module 180 can convert the power voltage signal into voltage signals that are adapted to the local dimming module 120 and the control module 130 respectively, so as to supply power to the local dimming module 120 and the control module 130.

[0078] For example, the motherboard 20 outputs a 12V power supply voltage signal, and the power conversion module 180 converts the 12V power supply voltage signal into a 5V first voltage signal and outputs it to the local dimming module 120 to power it; and converts the 12V power supply voltage signal into a 3.3V second voltage signal and outputs it to the control module 130 to power it.

[0079] like Figure 8 As shown, in some embodiments of this application, the drive control circuit 100 may further include a backlight enable interface 190, a backlight power interface 191, and a backlight drive interface 192. The backlight enable interface 190 may be used to connect the motherboard 20, the local dimming module 120, and the backlight power interface 191 to receive and transmit the backlight enable signal BL_ON or the backlight adjustment signal PWM from the motherboard 20. The backlight power interface 191 may be used to connect the backlight drive interface 192 and the backlight power board 60 to transmit the backlight power signal of the backlight power board 60 to the backlight drive interface 192 in response to the backlight enable signal BL_ON or the backlight adjustment signal PWM. The backlight drive interface 192 may be used to connect the backlight drive board 40 to output the backlight power signal and the backlight control signal to the backlight drive board 40.

[0080] In this embodiment, the motherboard 20 can output a backlight enable signal BL_ON to the backlight enable interface 190 and the backlight power board 60. The backlight enable interface 190 can transmit the BL_ON signal to the backlight power interface 191, and the backlight power board 60 can operate in response to the BL_ON signal, outputting a backlight power signal to the backlight power interface 191. The backlight power interface 191 can then transmit the backlight power signal to the backlight driver interface 192 in response to the BL_ON signal from the backlight enable interface 190. The backlight driver interface 192 then transmits the backlight power signal and backlight control signal to the backlight driver board 40, enabling the backlight driver board 40 to control the backlight of the display screen 50 based on the backlight power signal and the backlight control signal.

[0081] Understandably, the motherboard 20 can also output a backlight adjustment signal PWM to the backlight enable interface 190 and the backlight power board 60; wherein, the backlight enable interface 190 can transmit the backlight adjustment signal PWM to the backlight power interface 191, and the backlight power board 60 can adjust the output of the backlight power signal in response to the backlight adjustment signal PWM. Understandably, unlike local dimming, the backlight adjustment signal PWM here can be used to adjust the backlight of the display screen 50 as a whole.

[0082] Similarly, the backlight power interface 191 can transmit the backlight power signal to the backlight driver interface 192 in response to the backlight adjustment signal PWM from the backlight enable interface 190. The backlight driver interface 192 then transmits the backlight power signal and the backlight control signal to the backlight driver board 40, so that the backlight driver board 40 can control the backlight of the display screen 50 based on the backlight power signal and the backlight control signal.

[0083] In this embodiment, the backlight enable interface 190 can also transmit the backlight enable signal BL_ON or the backlight adjustment signal PWM to the local dimming module 120. The local dimming module 120 can perform local dimming based on the received backlight enable signal BL_ON or the backlight adjustment signal PWM, thereby improving the accuracy of backlight adjustment.

[0084] Please see Figure 2 Based on the above embodiments, this application also provides a control board, which 10 may include, for example, Figures 3 to 8 The corresponding drive control circuit 100 in any embodiment.

[0085] Because the control board 10 includes the present application, as described in this application. Figures 3 to 8 Corresponding to the drive control circuit 100 in any embodiment, the present application can be implemented as described above. Figures 3 to 8For all the beneficial effects that the drive control circuit 100 can achieve in any embodiment, please refer to the preceding description, which will not be repeated here.

[0086] Please continue reading. Figure 2 Based on the above embodiments, this application also provides a display device, which may include a device body and a component disposed on the device body, such as... Figures 3 to 8 This corresponds to the drive control circuit 100 or control board 10 in any embodiment.

[0087] The display device can be an interactive smart flat panel, a large display screen, an electronic whiteboard, a digital signage, a car navigation system, or other electronic devices.

[0088] Since the display device includes the present application, Figures 3 to 8 Corresponding to the drive control circuit 100 in any embodiment, the present application can be implemented as described above. Figures 3 to 8 For all the beneficial effects that the drive control circuit 100 can achieve in any embodiment, please refer to the preceding description, which will not be repeated here.

[0089] In some embodiments of this application, the display device may further include a motherboard 20, a logic board 30, and a display screen 50 connected to the logic board 30, all of which are connected to the drive control circuit 100. The motherboard 20 is connected to the logic board 30 to output a second image display signal to the logic board 30, so that the logic board 30 can control the display screen 50 to display an image according to the second image display signal. The second image display signal is a signal obtained by the motherboard 20 after performing local dimming processing on the original display signal.

[0090] In this embodiment, when the motherboard 20 is selected for local dimming control, it can process the original backlight signal and the original display signal to generate a first driving signal output to the driving control circuit 100. The driving control circuit 100 converts the first driving signal into a backlight control signal and outputs it to the backlight driver board 40. The backlight driver board 40 controls the backlight of the display screen 50 according to the backlight control signal. At the same time, it also generates a second image display signal output to the logic board 30, for example, to the VBO / EDP interface of the logic board 30, so that the logic board 30 can control the display screen 50 to display images according to the second image display signal.

[0091] In some embodiments of this application, the motherboard 20 is connected to the logic board 30 and can also output a fourth display control signal to the logic board 30; the logic board 30 can be used to obtain the original display signal according to the fourth display control signal, and perform local dimming processing on the original display signal to obtain a third image display signal and output it to the display screen 50 so that the display screen 50 can display an image according to the third image display signal.

[0092] In this embodiment, when the logic board 30 is selected for local dimming control, the motherboard 20 can be connected to the VBO / EDP interface of the logic board 30 to output a fourth display control signal. The logic board 30 can extract the original backlight signal and the original display signal from the fourth display control signal and process them. Then, it generates a second drive signal and outputs it to the drive control circuit 100. The drive control circuit 100 converts the second drive signal into a backlight control signal and outputs it to the backlight driver board 40. The backlight driver board 40 controls the backlight of the display screen 50 according to the backlight control signal. At the same time, it also generates a third image display signal and outputs it to the display screen 50 to control the display screen 50 to display an image according to the third image display signal.

[0093] The display device in this application embodiment is compatible with a variety of local dimming control schemes, and is also compatible with motherboards with a variety of display data interfaces, which greatly improves the compatibility of the schemes and the flexibility of selection.

[0094] like Figure 9 As shown, as an example, the data interface 110 uses an SPI interface, the first display interface 140 uses a first VBO interface, the second display interface 160 uses a second VBO interface, the motherboard 20 uses a SOC, and the control module 130 uses an MCU.

[0095] When the SOC is selected for local dimming control, as shown by the red arrow, its output first drive signal is transmitted to the MCU through the SPI interface. The MCU converts the first drive signal into a backlight control signal and outputs it to the backlight driver board 40 through the backlight driver interface 192. The backlight driver board 40 adjusts the backlight of the display screen 50 according to the backlight power signal and the backlight control signal. At the same time, the SOC also outputs a second image display signal to the VBO / EDP interface of the logic board 30, so that the logic board 30 controls the display screen 50 to display an image according to the second image display signal.

[0096] When the logic board 30 is selected for local dimming control, as shown by the blue arrow, its VBO / EDP interface receives the fourth display control signal from the motherboard 20. The original backlight signal and the original display signal are extracted from the fourth display control signal and processed to generate a second drive signal, which is transmitted to the MCU via the SPI interface. The MCU converts the second drive signal into a backlight control signal and outputs it to the backlight driver board 40 through the backlight driver interface 192. The backlight driver board 40 adjusts the backlight of the display screen 50 according to the backlight power signal and the backlight control signal. At the same time, a third image display signal is also generated and output to the display screen 50, controlling the display screen 50 to display an image according to the third image display signal.

[0097] When the local dimming module 120 is selected for local dimming control, as shown by the green arrow, the SOC is connected to the first VBO interface or the display conversion module 150. The display conversion module 150 is used to convert non-VBO signals into VBO signals. The local dimming module 120 extracts and processes the received VBO signals, generates a third drive signal, and outputs it to the MCU. The MCU converts the third drive signal into a backlight control signal and outputs it to the backlight driver board 40 through the backlight driver interface 192. The backlight driver board 40 adjusts the backlight of the display screen 50 according to the backlight power signal and the backlight control signal. At the same time, the local dimming module 120 generates a first image display signal and outputs it to the logic board 30 through the second VBO interface, so that the logic board 30 controls the display screen 50 to display images according to the first image display signal.

[0098] The display device in this application embodiment is compatible with motherboards that support various local dimming control schemes and various display data interfaces, offering high flexibility and expanding application scenarios.

[0099] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A drive control circuit, characterized in that, include: A data interface is used to connect the motherboard and the logic board to receive a first driving signal or a second driving signal; wherein the first driving signal is a signal obtained by the motherboard after performing local dimming processing on the original backlight signal, and the second driving signal is a signal obtained by the logic board after performing local dimming processing on the original backlight signal. A local dimming module is used to connect to the motherboard to receive the original backlight signal from the motherboard and perform local dimming processing on the original backlight signal to obtain a third driving signal. A control module is used to connect the data interface and the local dimming module to convert the first driving signal, the second driving signal, or the third driving signal into a backlight control signal; wherein the backlight control signal is used to control the backlight driver board to work.

2. The drive control circuit according to claim 1, characterized in that, The drive control circuit also includes a first display interface; The first display interface is used to connect the motherboard and the local dimming module to receive and transmit a first display control signal from the motherboard; The local dimming module is used to obtain the original backlight signal according to the first display control signal, and to perform local dimming processing on the original backlight signal to obtain the third driving signal.

3. The drive control circuit according to claim 2, characterized in that, The drive control circuit also includes a display conversion module; The display conversion module is used to connect the motherboard and the local dimming module to receive a second display control signal from the motherboard and convert the second display control signal into a third display control signal and output it to the local dimming module; wherein the signal format of the second display control signal is different from the signal format of the first display control signal, and the signal format of the third display control signal is the same as the signal format of the first display control signal; The local dimming module is used to obtain the original backlight signal according to the third display control signal, and to perform local dimming processing on the original backlight signal to obtain the third driving signal.

4. The drive control circuit according to any one of claims 1-3, characterized in that, The drive control circuit also includes a second display interface; The second display interface is used to connect the local dimming module and the logic board to transmit the first image display signal from the local dimming module to the logic board, so that the logic board can control the display screen to display an image according to the first image display signal; wherein, the first image display signal is the signal obtained by the local dimming module after performing local dimming processing on the original display signal.

5. The drive control circuit according to any one of claims 1-3, characterized in that, The drive control circuit also includes a power interface and a power conversion module; The power interface is used to connect to the motherboard and the power conversion module to transmit the power voltage signal from the motherboard to the power conversion module; The power conversion module is used to connect the local dimming module and the control module to obtain a first voltage signal and a second voltage signal based on the power supply voltage signal; wherein, the first voltage signal is used to power the local dimming module and the second voltage signal is used to power the control module.

6. The drive control circuit according to any one of claims 1-3, characterized in that, The drive control circuit also includes a backlight enable interface, a backlight power interface, and a backlight drive interface. The backlight enable interface is used to connect the motherboard, the local dimming module and the backlight power interface to receive and transmit backlight enable signals or backlight adjustment signals from the motherboard. The backlight power interface is used to connect the backlight drive interface and the backlight power board, so as to transmit the backlight power signal of the backlight power board to the backlight drive interface in response to the backlight enable signal or the backlight adjustment signal. The backlight driver interface is used to connect to the backlight driver board to output the backlight power signal and the backlight control signal to the backlight driver board.

7. A control board, characterized in that, The drive control circuit includes any one of claims 1-6.

8. A display device, characterized in that, It includes a device body and a drive control circuit as described in any one of claims 1-6 or a control board as described in claim 7, disposed on the device body.

9. The display device according to claim 8, characterized in that, The display device also includes a motherboard, a logic board, and a display screen connected to the logic board, all of which are connected to the drive control circuit. The motherboard is connected to the logic board to output a second image display signal to the logic board, so that the logic board can control the display screen to display images according to the second image display signal; wherein, the second image display signal is a signal obtained by the motherboard after performing local dimming processing on the original display signal.

10. The display device according to claim 8, characterized in that, The display device also includes a motherboard, a logic board, and a display screen connected to the logic board, all of which are connected to the drive control circuit. The motherboard is connected to the logic board to output a fourth display control signal to the logic board; The logic board is used to obtain the original display signal according to the fourth display control signal, and to perform local dimming processing on the original display signal to obtain a third image display signal, which is then output to the display screen so that the display screen displays an image according to the third image display signal.

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