Control system and display device

Abstract

The utility model relates to a control system and a display device. The control system comprises a circuit board; the time sequence control chip is arranged on the circuit board and provided with a first input pin and a first output pin, the first input pin is configured to receive a VBO signal, the time sequence control chip is configured to process the VBO signal to obtain backlight control information, and the first output pin is configured to output the backlight control information; the backlight control chip is arranged on the circuit board and provided with a second input pin and a second output pin, the second input pin is in signal connection with the first output pin and is configured to receive backlight control information, and the backlight control chip is configured to convert the backlight control information into a backlight control signal and send the backlight control signal to the circuit board. The second output pin is configured to output a backlight control signal. Therefore, the structure of the control system is simplified, and the method is suitable for high-partition display equipment.

Description

Technical Field

[0001] This application relates to the field of backlight technology, and more particularly to a display device control system and a display device. Background Technology

[0002] In related technologies, for displays with multiple zones, a separate backlight control board is typically used for each zone to dim the backlight. This results in a large number of connecting cables, such as data cables and power cables, between the motherboard (containing the main control chip) and the backlight control board. For high-zone televisions, these numerous connecting cables consume a significant amount of memory for the main control chip's data processing, and require separate pins on the main control integrated circuit to transmit data. The pin count of common main control integrated circuits is often insufficient to meet the speed requirements of high-zone displays, thus making it impossible to achieve local dimming in high-zone televisions. Utility Model Content

[0003] This application provides a control system and a display device that simplify the control system structure and are suitable for high-zone dimming, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a control system is provided, comprising:

[0005] Circuit board;

[0006] The timing control chip, mounted on the circuit board, has a first input pin and a first output pin. The first input pin is configured to receive the VBO signal, and the timing control chip is configured to process the VBO signal to obtain backlight control information. The first output pin is configured to output the backlight control information.

[0007] The backlight control chip, mounted on a circuit board, has a second input pin and a second output pin. The second input pin is signal-connected to the first output pin and is configured to receive backlight control information. The backlight control chip is configured to convert the backlight control information into a backlight control signal, and the second output pin is configured to output the backlight control signal.

[0008] In some embodiments, the timing control chip also has a third output pin, which is configured to output a VBO signal.

[0009] In some embodiments, the control system further includes a motherboard having a main control chip having a third input pin and a fourth output pin. The third input pin is configured to connect to a signal source, and the main control chip is configured to receive a VBO signal sent by the signal source. The fourth output pin is signal-connected to the first input pin and is configured to transmit the VBO signal to a timing control chip.

[0010] In some embodiments, the control system further includes a power board connected to the circuit board and the motherboard, configured to regulate the power supplied to the circuit board and the motherboard.

[0011] In some embodiments, the circuit board is further provided with a first connector and a second connector;

[0012] The first connector is connected to the third output pin and is configured to output a VBO signal; the second connector is connected to the second output pin and is configured to output a backlight control signal.

[0013] In some embodiments, the first connector and the second connector are disposed on opposite sides of the circuit board.

[0014] In some embodiments, a third connector is also provided on the circuit board, which is signal-connected to the fourth output pin and the first input pin and is configured to receive the VBO signal.

[0015] In some embodiments, the backlight control information includes pixel brightness information and chromaticity information.

[0016] According to a second aspect of this application, a display device is provided, including the control system described above, and further comprising:

[0017] The backlight module, connected to the second output pin, is configured to receive a backlight control signal and adjust the backlight of the display device according to the backlight control signal.

[0018] The display module is connected to the third output pin of the timing control chip and is configured to receive the VBO signal and display the image according to the VBO signal.

[0019] In some embodiments, the backlight module includes a first control chip and a light source. The first control chip is signal-connected to a second output pin and is configured to receive a backlight control signal and adjust the light source according to the backlight control signal.

[0020] In the control system of this application embodiment, the use of VBO signals to transmit information can improve transmission efficiency. By integrating the timing control chip and the backlight control chip onto a single circuit board, the backlight control signal is transmitted using the lines on the circuit board, eliminating the need for external wiring and the connection lines between the motherboard and the backlight control board (which houses the backlight control chip). Furthermore, multiple backlight control boards can be mounted on the circuit board, making it suitable for high-zone display devices. In addition, in this application, the VBO signal is processed by the timing control chip, and the resulting backlight control signal is sent to the backlight control chip. The processing rate of the VBO signal is no longer limited by the main control chip; therefore, the control system of this application can also improve backlight control efficiency. Moreover, integrating the main control chip and the backlight control chip onto a single circuit board eliminates the need to fabricate separate substrates for the timing control chip and the backlight control chip, reducing manufacturing processes and contributing to improved production efficiency.

[0021] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] 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 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.

[0023] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0024] Figure 1 This is a structural block diagram of a control system provided in an embodiment of this application;

[0025] Figure 2 This is a structural block diagram of a display device provided in an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Circuit board; 11. Timing control chip; 12. Backlight control chip;

[0028] 20. Motherboard; 21. Main control chip;

[0029] 30. Power supply board;

[0030] 40. First connecting component;

[0031] 50. Second connector;

[0032] 60. Third connector;

[0033] 70. Backlight module; 71. First control chip; 72. Light source;

[0034] 80. Display module;

[0035] 100. Control system;

[0036] 200. Display devices. Detailed Implementation

[0037] 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 protection scope of this application.

[0038] In related technologies, for displays with multiple dimming zones, each zone typically uses a separate backlight control board to control its backlight, resulting in numerous interconnecting lines between the motherboard (containing the main control chip) and the backlight control board. Furthermore, when applied to high-zone display devices, processing a large number of zone dimming control signals consumes a significant amount of the main control chip's memory. After signal processing, separate pins need to be routed from the main control chip to transmit backlight control information. However, the main control chip and the backlight control board commonly use SPI (Serial Peripheral Interface) signals for information transmission. A single SPI signal typically requires four pins, and the maximum speed of a single SPI signal is only around 20 Mbps. Common main control chips can only transmit a maximum of three SPI signals, making it difficult to meet the information transmission requirements of backlight control signals in modern high-zone display devices.

[0039] In view of the above problems, this application provides a control system and a display device to at least partially solve the above technical problems.

[0040] According to a first aspect of this application, a control system 100 is provided; see [link to relevant documentation]. Figure 1 , Figure 1This is a structural block diagram of a control system provided in an embodiment of this application. The control system 100 provided in this application includes: a circuit board 10; a timing control chip 11, disposed on the circuit board 10, having a first input pin (not shown in the figure) and a first output pin (not shown in the figure), the first input pin being configured to receive a VBO signal, the timing control chip 11 being configured to process the VBO signal to obtain backlight control information, and the first output pin being configured to output the backlight control information; a backlight control chip 12, disposed on the circuit board 10, having a second input pin (not shown in the figure) and a second output pin (not shown in the figure), the second input pin being signal-connected to the first output pin and configured to receive backlight control information, the backlight control chip 12 being configured to convert the backlight control information into a backlight control signal, and the second output pin being configured to output the backlight control signal.

[0041] It is understood that signal connections between different devices on a circuit board and signal connections between pins of different chips can be achieved through lines on the circuit board. In this application, the specific settings of the lines on the circuit board used to achieve signal connections between different devices and signal connections between pins of different chips can be referred to the content in related technologies, and this application does not limit them.

[0042] Display devices typically include a backlight module and a display system. In the backlight module, information such as backlight control information is usually transmitted using SPI signals. However, this application uses VBO (Vertical Blanking Interval) signals. VBO signals typically transmit data based on the vertical blanking period (vertical retrace time), during which the screen is not refreshing pixels. This allows for conflict-free transmission of backlight control signals within this time window. Compared to SPI, which requires continuous occupation of the communication line, the periodic transmission mechanism of VBO signals utilizes system timing resources more efficiently. Therefore, using VBO signals to transmit information in this application improves transmission efficiency.

[0043] Meanwhile, because the SPI protocol requires at least four communication lines (SCLK, MOSI, MISO, CS), when the main control chip 21 of the motherboard 20 is directly connected to the backlight control board (which has a backlight control chip 12), a large number of connection lines are needed between them, resulting in a large space occupied by the control system 100. Furthermore, the number of pins on the motherboard 20 limits the number of backlight control boards that can be connected to it, making it difficult to meet the needs of high-zone display devices. In this embodiment, the motherboard 20 is no longer directly connected to the backlight control chip 12. The backlight control signal received by the backlight control chip 12 is sent by the timing control chip 11, which is integrated with the backlight control chip 12 on a single circuit board 10. The transmission of the backlight control signal is achieved through the lines on the circuit board 10, eliminating the need for external wiring. Therefore, the control system 100 of this application eliminates the connection lines between the motherboard 20 and the backlight control board. Simultaneously, the number of backlight control boards is no longer limited by the number of pins on the motherboard 20, making it suitable for high-zone display devices.

[0044] Furthermore, in this embodiment, the VBO signal is processed by the timing control chip 11, and the resulting backlight control signal is sent to the backlight control chip 12, instead of being processed by the main control chip 21. The processing rate of the VBO signal is no longer limited by the main control chip 21. Therefore, the control system 100 of this application can also improve the backlight control efficiency.

[0045] Integrating the timing control chip 11 and the backlight control chip 12 onto a single circuit board 10 eliminates the need to fabricate separate substrates for the timing control chip 11 and the backlight control chip 12, reducing production steps and improving production efficiency.

[0046] In some embodiments of this application, the timing control chip 11 also has a third output pin (not shown in the figure), which is configured to output a VBO signal.

[0047] In some embodiments of this application, the backlight control information includes pixel brightness information and chromaticity information.

[0048] Please continue reading. Figure 1 In some embodiments of this application, the control system 100 further includes a motherboard 20, which has a main control chip 21. The main control chip 21 has a third input pin (not shown in the figure) and a fourth output pin (not shown in the figure). The third input pin is configured to connect to a signal source, and the main control chip 21 is configured to receive the VBO signal sent by the signal source. The fourth output pin is connected to the first input pin and is configured to transmit the VBO signal to the timing control chip 11.

[0049] Unlike the SPI protocol, which requires at least four communication lines (SCLK, MOSI, MISO, CS), VBO can utilize existing timing signals (such as Vsync) or low-voltage differential signaling (LVDS) channels in the display system to transmit control information, reducing the hardware cost of dedicated communication lines. Therefore, when the timing control chip 11 of the control system 100 provided in this application receives the VBO signal, it requires fewer information transmission channels, thereby reducing the number of pins occupied by the main control chip 21 and freeing up a large number of pins on the main control chip 21, facilitating connection between the main control chip 21 and other devices. Furthermore, the reduced number of pins occupied by the main control chip 21 means fewer connection lines between the motherboard 20 and the circuit board 10, which helps to further reduce the space occupied by the control system 100 and simplify its structure.

[0050] Please continue reading. Figure 1 In some embodiments of this application, the control system 100 further includes a power board 30, which is connected to the circuit board 10 and the motherboard 20 and is configured to regulate the power supplied to the circuit board 10 and the motherboard 20.

[0051] In this embodiment, a power supply board 30 regulates the power supply to the circuit board 10 and the main board 20, for example, through voltage conversion and regulation, enabling multi-output and load management, filtering and anti-interference functions, and protection functions (such as automatic power cut-off in case of overvoltage or overcurrent). This ensures that the power supply to the circuit board 10 and the main board 20 meets their respective power requirements. For example, ensuring that the voltage and current of the circuit board 10 meet its needs prevents damage due to overvoltage or overcurrent, thus improving the reliability of the control system 100 provided in this application.

[0052] Furthermore, in some embodiments of this application, the power board 30 is connected to the motherboard 20, and the motherboard 20 is configured to control the power supply and power-off of the power board 30.

[0053] Please continue reading. Figure 1 In some embodiments of this application, the circuit board 10 is further provided with a first connector 40 and a second connector 50; the first connector 40 is connected to a third output pin signal and is configured to output a VBO signal; the second connector 50 is connected to a second output pin signal and is configured to output a backlight control signal.

[0054] In this embodiment, the first connector 40 and the second connector 50 on the circuit board 10 are used to output VBO signals and backlight control signals. Compared with other connection methods (such as wire soldering, circuit board to circuit board soldering, etc.), the control system 100 provided in this application is more convenient to connect to external devices through connectors, and it is a detachable connection, which makes it more convenient to repair and replace when the connected device fails.

[0055] In some embodiments of this application, the first connector 40 is a first socket, and / or the second connector 50 is a second socket.

[0056] In this embodiment, the first socket has 60 pins with a pin pitch of 0.5 mm. The second socket can be the same type as the first socket. This reduces the number of cables, and the control system 100 can be used with only a small number of first and second sockets when applied to a high-zone display device 200. For example, when applied to a 12096-zone display device, only four first sockets are needed.

[0057] Please continue reading. Figure 1 In some embodiments of this application, the first connector 40 and the second connector 50 are disposed on opposite sides of the circuit board 10.

[0058] In this embodiment, by placing the first connector 40 and the second connector 50 on opposite sides of the circuit board 10, it is convenient for the first connector 40 and the second connector 50 to connect to external devices without interfering with each other.

[0059] Please continue reading. Figure 1 In some embodiments of this application, a third connector 60 is also provided on the circuit board 10. The third connector 60 is signal connected to the fourth output pin and the first input pin and is configured to receive the VBO signal.

[0060] In this embodiment, the main control chip 21 and the timing control chip 11 are connected by the third connector 60, so as to realize the detachable connection between the main control chip 21 and the circuit board 10, which makes it easy to replace the circuit board 10 or the motherboard 20 according to actual needs.

[0061] According to a second aspect of this application, a display device 200 is provided; please refer to... Figure 2 , Figure 2 This is a structural block diagram of a display device provided in an embodiment of this application. The display device 200 provided in this application includes the control system 100 as described above, and further includes: a backlight module 70, which is connected to a second output pin and configured to receive a backlight control signal and adjust the backlight of the display device 200 according to the backlight control signal; and a display module 80, which is connected to a third output pin of a timing control chip 11 and configured to receive a VBO signal and display an image according to the VBO signal.

[0062] In this embodiment, the second output pin of the control system 100 is connected to the backlight module 70, enabling the backlight module 70 to control the backlight of the display device 200 according to the backlight control signal output from the second output pin. The third output pin of the control system 100 is connected to the display module 80, which can display images according to the relevant information in the VBO signal. Because the signal transmitted between the display module 80 and the control system 100 is a VBO signal, compared to other types of signals, such as SPI signals, the number of connection lines between the control system 100 and the display module 80 provided in this application is reduced, which helps to simplify the structure of the display device 200.

[0063] Please continue reading. Figure 2 In some embodiments of this application, the backlight module 70 includes a first control chip 71 and a light source 72. The first control chip 71 is connected to a second output pin signal and is configured to receive a backlight control signal and adjust the light source 72 according to the backlight control signal.

[0064] In this embodiment of the application, the method of adjusting the backlight of the display device 200 by the backlight module 70 is to use the first control chip 71 of the backlight module 70. The backlight control signal may include pixel brightness control signal, color control signal, etc. The first control chip 71 reads these signals and controls the light source 72 according to these signals.

[0065] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0066] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0067] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0068] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. 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 control system, characterized in that, include: Circuit board; A timing control chip, disposed on the circuit board, has a first input pin and a first output pin. The first input pin is configured to receive a VBO signal, the timing control chip is configured to process the VBO signal to obtain backlight control information, and the first output pin is configured to output the backlight control information. A backlight control chip, disposed on the circuit board, has a second input pin and a second output pin. The second input pin is signal-connected to the first output pin and is configured to receive the backlight control information. The backlight control chip is configured to convert the backlight control information into a backlight control signal, and the second output pin is configured to output the backlight control signal.

2. The control system according to claim 1, characterized in that, The timing control chip also has a third output pin, which is configured to output the VBO signal.

3. The control system according to claim 2, characterized in that, The control system further includes a motherboard with a main control chip. The main control chip has a third input pin and a fourth output pin. The third input pin is configured to connect to a signal source, and the main control chip is configured to receive the VBO signal sent by the signal source. The fourth output pin is connected to the first input pin and is configured to transmit the VBO signal to the timing control chip.

4. The control system according to claim 3, characterized in that, The control system also includes a power board, which is connected to the circuit board and the motherboard and is configured to regulate the power supplied to the circuit board and the motherboard.

5. The control system according to claim 3 or 4, characterized in that, The circuit board is also provided with a first connector and a second connector; The first connector is connected to the third output pin and configured to output the VBO signal; the second connector is connected to the second output pin and configured to output the backlight control signal.

6. The control system according to claim 5, characterized in that, The first connector and the second connector are disposed on opposite sides of the circuit board.

7. The control system according to claim 3, characterized in that, The circuit board is also provided with a third connector, which is connected to the fourth output pin and the first input pin and is configured to receive the VBO signal.

8. The control system according to claim 1, characterized in that, The backlight control information includes pixel brightness information and chromaticity information.

9. A display device, characterized in that, The control system, including any one of claims 1 to 8, further includes: The backlight module, connected to the second output pin signal, is configured to receive the backlight control signal and adjust the backlight of the display device according to the backlight control signal; The display module is connected to the third output pin of the timing control chip and is configured to receive the VBO signal and display an image based on the VBO signal.

10. The display device according to claim 9, characterized in that, The backlight module includes a first control chip and a light source. The first control chip is connected to the second output pin signal and is configured to receive the backlight control signal and adjust the light source according to the backlight control signal.

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