Display screen backlight control driving interface, backlight driving system and display equipment

Abstract

The invention discloses a display screen backlight control driving interface, a backlight driving system and a display device, the display screen backlight control driving interface is used for connecting a main control module and a backlight control module, and the display screen backlight control driving interface comprises a two-way serial communication data interface used for enabling the main control module to transmit a backlight control data signal to the backlight control module; the online program upgrading interface is used for enabling the main control module to carry out register setting on the backlight control module; the self-test enabling interface is used for enabling the main control module to control a switch of a self-test function of the backlight control module; the backlight enabling interface is used for enabling the main control module to control a switch of the backlight control module; the backlight preparation feedback interface is used for enabling the backlight control module to output a working state ready signal to the main control module; the abnormal interruption interface is used for enabling the backlight control module to output an abnormal state signal to the main control module; and the frame synchronization interface is used for enabling the backlight control module to control synchronous display of backlight and video pictures. The invention aims to improve the working stability of the backlight driving system.

Description

Technical Field

[0001] The present invention relates to the field of display screen drive interface, and in particular to a display screen backlight control drive interface, a backlight drive system and a display device. Background Art

[0002] MiniLED refers to LED chip display technology with a size of less than 100 microns. It can be made into a high-density LED array as the backlight source of liquid crystal displays, achieving precise control of local areas and improving contrast and dynamic range. The extensive use of MiniLED chips can achieve more screen backlight partitions, thereby achieving higher peak brightness, better color performance, and better cost and life.

[0003] After years of development, MiniLED backlight TVs have gradually become popular in the market, but there are still defects in the working stability of the backlight control system of large-size multi-zone, especially 10,000-level zones, which are mainly manifested in the anti-interference ability under the cross-interference of strong and weak electricity, high-frequency noise, etc. inside the TV, the self-recovery ability when various abnormalities occur in the system, and the timing control ability when the video screen is complex and changeable. In addition, there is no unified standard specification for the integration of resources of the two modules of main control and backlight. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a display screen backlight control drive interface, a backlight drive system and a display device to solve the problem of poor working stability of the backlight drive system.

[0005] The technical solution of the present invention is as follows:

[0006] A display screen backlight control driving interface is used to connect a main control module and a backlight control module, and the display screen backlight control driving interface includes:

[0007] A dual-channel serial communication data interface, used to enable the main control module to transmit the backlight control data signal to the backlight control module;

[0008] Online program upgrade interface, used to enable the main control module to set the registers of the backlight control module;

[0009] A self-test enable interface, used to enable the main control module to control the switch of the self-test function of the backlight control module;

[0010] Backlight enable interface, used to enable the main control module to control the switch of the backlight control module;

[0011] Backlight preparation feedback interface, used to enable the backlight control module to output a working state ready signal to the main control module;

[0012] Abnormal interrupt interface, used to make the backlight control module output abnormal status signal to the main control module;

[0013] The frame synchronization interface is used to enable the backlight control module to control the synchronous display of the backlight and the video image.

[0014] Optionally, the backlight control module includes a right half-area picture backlight controller and a left half-area picture backlight controller, and the two-way serial communication data interface includes:

[0015] A first communication interface is connected to the right half picture backlight controller and is used to enable the main control module to transmit the right half picture backlight control data signal to the right half picture backlight controller;

[0016] The second communication interface is connected to the left half area picture backlight controller and is used to enable the main control module to transmit the left half area picture backlight control data signal to the left half area picture backlight controller.

[0017] Optionally, the seventh pin, the ninth pin, the eleventh pin and the thirteenth pin of the display backlight control drive interface are used as the first communication interface, the fifteenth pin, the seventeenth pin, the nineteenth pin and the twenty-first pin of the display backlight control drive interface are used as the second communication interface, and the pins of the first communication interface and the pins of the second communication interface are both designed with ground isolation.

[0018] Optionally, the fifth pin of the display backlight control driver interface is used as the frame synchronization interface, the twenty-second pin of the display backlight control driver interface is used as the backlight enable interface, the twenty-fourth pin of the display backlight control driver interface is used as the abnormal interrupt interface, the twenty-fifth pin of the display backlight control driver interface is used as the backlight preparation feedback interface, the twenty-sixth pin of the display backlight control driver interface is used as the self-test enable interface, and the twenty-eighth and twenty-ninth pins of the display backlight control driver interface are used as the online program upgrade interface.

[0019] Optionally, the display screen backlight control drive interface also includes a backlight power supply interface and a ground interface, the first pin to the third pin of the display screen backlight control drive interface serve as a backlight power supply interface, and the sixth pin, the eighth pin, the tenth pin, the twelfth pin, the fourteenth pin, the sixteenth pin, the eighteenth pin, the twentieth pin, the twenty-seventh pin and the thirtieth to the thirty-second pins of the display screen backlight control drive interface serve as a ground interface.

[0020] Optionally, the display screen backlight control driving interface further includes a reserved function interface, and the fourth pin and the twenty-third pin of the display screen backlight control driving interface serve as the reserved function interface.

[0021] Optionally, the display screen backlight control drive interface is packaged in a thirty-two-pin SMD horizontal circuit board package.

[0022] The present invention further provides a backlight driving system, comprising a main control module, a backlight control module and the display screen backlight control driving interface as described above, wherein the main control module and the backlight control module are connected via the display screen backlight control driving interface.

[0023] Optionally, the main control module includes a power module and a control chip, the power module is used to supply power to the backlight control module, and the control chip is used to control the operation of the backlight control module:

[0024] The backlight control module is used to connect the backlight area of ​​the display screen. The backlight control module includes a DC conversion circuit, a right half screen backlight controller and a left half screen backlight controller. The DC conversion circuit is used to convert the voltage output by the power module into DC and then output it. The right half screen backlight controller is used to control the right half screen of the backlight area of ​​the display screen. The left half screen backlight controller is used to control the left half screen of the backlight area of ​​the display screen.

[0025] The present invention also provides a display device, comprising the backlight driving system as described above.

[0026] The technical solution of the present invention forms a display screen backlight control driving interface through a dual-channel serial communication data interface, an online program upgrade interface, a self-test enable interface, a backlight enable interface, a backlight preparation feedback interface, an abnormal interrupt interface and a frame synchronization interface, wherein the dual-channel serial communication data interface is used to enable the main control module to transmit the backlight control data signal to the backlight control module; the online program upgrade interface is used to enable the main control module to set the register of the backlight control module; the self-test enable interface is used to enable the main control module to control the switch of the self-test function of the backlight control module; the backlight enable interface is used to enable the main control module to control the switch of the backlight control module; the backlight preparation feedback interface is used to enable the backlight control module to output a working state ready signal to the main control module; the abnormal interrupt interface is used to enable the backlight control module to output an abnormal state signal to the main control module; and the frame synchronization interface is used to enable the backlight control module to control the synchronous display of the backlight and the video screen. In this way, the display screen backlight control driving interface of this scheme can improve the self-recovery ability of the system when various abnormalities occur through the abnormal interrupt interface, and improve the timing control ability when the video screen is complex and changeable through the frame synchronization interface, thereby improving the working stability of the backlight drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0028] Figure 1 It is a functional module diagram of an embodiment of a two-way serial communication data interface of the present invention.

[0029] Figure 2 It is a circuit structure diagram of an embodiment of a dual-channel serial communication data interface of the present invention.

[0030] Figure 3 It is a packaging schematic diagram of an embodiment of a two-way serial communication data interface of the present invention.

[0031] Figure 4 It is a functional module diagram of an embodiment of a backlight driving system of the present invention.

[0032] Explanation of the accompanying drawings: 10. Dual-channel serial communication data interface; 20. Online program upgrade interface; 30. Self-test enable interface; 40. Backlight enable interface; 50. Backlight preparation feedback interface; 60. Abnormal interrupt interface; 70. Frame synchronization interface; 80. Backlight power supply interface; 90. Ground interface; 100. Reserved function interface. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] In the embodiments and the scope of the patent application, unless the text specifically defines the article, "a", "an", "the" and "the" may also include plural forms. If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0035] It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when an element is said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can also be intermediate elements. In addition, the "connection" or "coupling" used herein can include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0036] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0037] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] MiniLED refers to LED chip display technology with a size of less than 100 microns. It can be made into a high-density LED array as the backlight source of liquid crystal displays, achieving precise control of local areas and improving contrast and dynamic range. The extensive use of MiniLED chips can achieve more screen backlight partitions, thereby achieving higher peak brightness, better color performance, and better cost and life.

[0039] After years of development, MiniLED backlit TVs have gradually become popular in the market, but there are still defects in the working stability of the backlight control system of large-size multi-zone, especially 10,000-level zones, which are mainly manifested in the anti-interference ability under the cross-interference of strong and weak electricity, high-frequency noise, etc. inside the TV, the self-recovery ability when various abnormalities occur in the system, and the timing control ability when the video screen is complex and changeable. In addition, there is no unified standard specification for the integration of resources of the two major modules of the main control and backlight. The 10,000-level zone backlight control system can divide the screen into up to 10,000 independently controlled areas or zones. The backlight brightness of each zone can be adjusted individually to achieve richer image performance.

[0040] In order to solve the above problem, the present invention proposes a display screen backlight control driving interface for connecting a main control module and a backlight control module.

[0041] Reference Figure 1 In one embodiment, the display backlight control drive interface includes:

[0042] A dual-channel serial communication data interface 10, used to enable the main control module to transmit a backlight control data signal to the backlight control module;

[0043] An online program upgrade interface 20, used to enable the main control module to set registers of the backlight control module;

[0044] A self-test enabling interface 30, used to enable the main control module to control the switch of the self-test function of the backlight control module;

[0045] A backlight enabling interface 40, used to enable the main control module to control the switch of the backlight control module;

[0046] The backlight preparation feedback interface 50 is used to enable the backlight control module to output a working state ready signal to the main control module;

[0047] Abnormal interrupt interface 60, used to make the backlight control module output abnormal state signal to the main control module;

[0048] The frame synchronization interface 70 is used to enable the backlight control module to control the synchronous display of the backlight and the video picture.

[0049] In this embodiment, a two-way serial communication (Serial Peripheral Interface, referred to as SPI) data interface can be used to transmit the backlight control data signal of the display screen, such as the main control module transmits the backlight control data signal to the backlight control module, and then the backlight control module controls the backlight area of ​​the display screen to display the corresponding brightness, so that the display screen produces visible brightness and contrast when displaying the image; and each signal pin corresponding to the group of signals can be designed with a ground separation, so that it can be prevented from being interfered by the surrounding electromagnetic noise, ensuring the electromagnetic compatibility anti-interference (Electromagnetic Susceptibility, referred to as EMS) capability, and improving the anti-interference capability under cross-interference such as high-frequency noise. The online program upgrade interface 20 allows the main control module to set the register of the backlight control module, so that the online program upgrade can be realized, and the iteration capability of the backlight control system program can be improved; and the main control module can also modify the corresponding parameters, such as brightness level, dimming speed, etc., to achieve personalized settings when setting the register of the backlight control module. And improving the iteration capability is conducive to error repair, such as finding a logical error or performance problem, it can be repaired in time to increase the stability of the display product. The self-test enable interface 30 enables the main control module to control the switch of the self-test function of the backlight control module, which can enhance the debuggability and error correction capabilities of the system; for example, through the self-test function, the main control module can monitor various parameters of the backlight module (such as current, temperature, brightness, etc.) and generate a status report; it can also perform self-tests regularly to verify the sensitivity and accuracy of backlight adjustment to ensure the normal operation of the system. The backlight enable interface 40 enables the main control module to control the switch of the backlight control module, so that users can adjust the display effect as needed, and when the backlight is not needed, the power consumption can be reduced by turning off the function, which helps to extend the service life of the device, especially in portable devices. The backlight preparation feedback interface 50 enables the backlight control module to output a working state ready signal to the main control module; the signal originates from the backlight control module, and is specifically used to report to the main control module that the working states of the backlight control module are ready, waiting to receive the backlight control data signal from the main control module, thereby improving the system timing control capability, so that the main control module can obtain the status information of the backlight control module in real time, ensure the coordination and synchronization of various parts of the system, and improve the overall operating efficiency; and in applications that require rapid response, status feedback can reduce the delay caused by information lag and improve user experience. The abnormal interrupt interface 60 enables the backlight control module to output an abnormal state signal to the main control module, and promptly feedback the abnormal state of the backlight control module to the main control module, including lamp board failure, data verification failure, control chip stuck, control board short circuit, etc., thereby improving the self-recovery capability of the system.The frame synchronization interface 70 can be used to transmit the frame synchronization signal, which is derived from the extraction of the video frame synchronization signal, so that the backlight control module can accurately control the synchronous display of the backlight and the video screen, thereby improving the system timing control capability. In summary, the display screen backlight control drive interface of this solution has a high working stability in the backlight control system of 10,000-level partitions. Specifically, it can improve the anti-interference ability under cross-interference such as high-frequency noise, the self-recovery ability of the system when various abnormalities occur, and the timing control ability when the video screen is complex and changeable. And the display screen backlight control drive interface can be used as an interface standard for connecting the main control module and the backlight control module.

[0050] The technical solution of the present invention forms a display screen backlight control drive interface through a dual-channel serial communication data interface 10, an online program upgrade interface 20, a self-test enable interface 30, a backlight enable interface 40, a backlight preparation feedback interface 50, an abnormal interrupt interface 60 and a frame synchronization interface 70, wherein the dual-channel serial communication data interface 10 is used to enable the main control module to transmit the backlight control data signal to the backlight control module; the online program upgrade interface 20 is used to enable the main control module to set the register of the backlight control module; the self-test enable interface 30 is used to enable the main control module to control the switch of the self-test function of the backlight control module; the backlight enable interface 40 is used to enable the main control module to control the switch of the backlight control module; the backlight preparation feedback interface 50 is used to enable the backlight control module to output a working state ready signal to the main control module; the abnormal interrupt interface 60 is used to enable the backlight control module to output an abnormal state signal to the main control module; and the frame synchronization interface 70 is used to enable the backlight control module to control the synchronous display of the backlight and the video screen. In this way, the display backlight control drive interface of this solution can improve the self-recovery ability of the system when various abnormalities occur through the abnormal interrupt interface 60, and improve the timing control ability when the video screen is complex and changeable through the frame synchronization interface 70, thereby improving the working stability of the backlight drive system.

[0051] In one embodiment, the backlight control module includes a right half screen backlight controller and a left half screen backlight controller, and the two-way serial communication data interface 10 includes:

[0052] A first communication interface is connected to the right half picture backlight controller and is used to enable the main control module to transmit the right half picture backlight control data signal to the right half picture backlight controller;

[0053] The second communication interface is connected to the left half area picture backlight controller and is used to enable the main control module to transmit the left half area picture backlight control data signal to the left half area picture backlight controller.

[0054] In this embodiment, the two-way serial communication data interface 10 can be composed of a first communication interface and a second communication interface, which are respectively connected to the right half screen backlight controller and the left half screen backlight controller, so that the backlight of the display screen can be divided into left and right parts for control. By independently controlling the backlight of the left and right parts, it can be adjusted according to different scenes to improve the black depth and white brightness, thereby enhancing the contrast; and by adjusting the backlight of the left and right parts, the display effect can be quickly optimized under different contents (such as videos, games, etc.). It also has the functions of improving viewing comfort and adapting to different ambient light.

[0055] Reference Figure 2 In an exemplary technology, the seventh pin, the ninth pin, the eleventh pin and the thirteenth pin of the display backlight control drive interface are used as the first communication interface, and the fifteenth pin, the seventeenth pin, the nineteenth pin and the twenty-first pin of the display backlight control drive interface are used as the second communication interface, and the pins of the first communication interface and the pins of the second communication interface are both designed with ground separation. In this embodiment, the eight pins in the display backlight control drive interface can be used as a two-way serial communication data interface 10, and the first communication interface and the second communication interface each include four pins. Setting multiple pins can facilitate the transmission of communication data and ensure the transmission quality. Among them, the seventh pin, the ninth pin, the eleventh pin and the thirteenth pin of the display backlight control drive interface are set as the first communication interface to connect with the right half screen backlight controller, respectively corresponding to Figure 2 Set the 15th, 17th, 19th and 21st pins of the display backlight control driver interface as the second communication interface to connect to the left half screen backlight controller, corresponding to Figure 2 SPI0_MOSI, SPI0_MISO, SPI0CLK and SPI0_CSN in the SPI0_MOSI, SPI0_MISO, SPI0CLK and SPI0_CSN. It is understandable that in actual applications, the numbers of the pins corresponding to the first communication interface and the second communication interface can be adjusted according to actual conditions, and are not limited here. In addition, the pins of the first communication interface and the pins of the second communication interface are both designed with ground isolation to prevent them from being interfered by the surrounding electromagnetic noise, ensure electromagnetic compatibility and anti-interference capabilities, and improve the anti-interference capabilities under cross-interference such as high-frequency noise.

[0056] Reference Figure 2 In one embodiment, the fifth pin of the display backlight control drive interface is used as the frame synchronization interface 70, corresponding to Figure 2 VSYNC in; the twenty-second pin of the display backlight control drive interface as the backlight enable interface 40, corresponding to Figure 2The twenty-fourth pin of the display backlight control drive interface as the abnormal interrupt interface 60, corresponding to Figure 2 INT_B in the display backlight control drive interface pin 25 as the backlight preparation feedback interface 50, corresponding to Figure 2 BL_READY in the display backlight control drive interface; the twenty-sixth pin as the self-test enable interface 30, corresponding to Figure 2 The display backlight control drive interface pin 28 and pin 29 as the online program upgrade interface 20, corresponding to Figure 2 I2C_SCL-UP and I2C_SDA-UP in.

[0057] In this embodiment, the functions corresponding to the frame synchronization interface 70, the backlight enable interface 40, the abnormal interrupt interface 60, the backlight preparation feedback interface 50 and the self-test enable interface 30 are that the main control module outputs a signal to the backlight control module, or that the backlight control module outputs a signal to the main control module, so they can all be implemented with one pin; the online program upgrade interface 20 uses I2C (Inter-Integrated Circuit) bus communication, so it can be implemented with two pins, one for data transmission and the other for clock signal transmission; other communication methods can also be used to implement program upgrades, which are not limited here. It can be understood that in actual applications, the numbers of the pins corresponding to the specific frame synchronization interface 70, the backlight enable interface 40, the abnormal interrupt interface 60, the backlight preparation feedback interface 50, the self-test enable interface 30 and the online program upgrade interface 20 can be adjusted according to actual conditions, which are not limited here.

[0058] Reference Figure 2 In one embodiment, the display backlight control drive interface also includes a backlight power supply interface 80 and a ground interface 90, the first pin to the third pin of the display backlight control drive interface serve as the backlight power supply interface 80, and the sixth pin, the eighth pin, the tenth pin, the twelfth pin, the fourteenth pin, the sixteenth pin, the eighteenth pin, the twentieth pin, the twenty-seventh pin and the thirtieth pin to the thirty-second pin of the display backlight control drive interface serve as the ground interface 90.

[0059] In this embodiment, the backlight power supply interface 80 can connect the power supply to the backlight driver and other devices to provide a 12V backlight power supply for the backlight driver. The ground interface 90 provides a common reference voltage so that all components in the circuit can work under the same reference voltage, providing a path for current reflux to ensure safety and normal operation. It can be understood that in actual applications, the specific numbers of the backlight power supply interface 80 and the ground interface 90 can be adjusted according to actual conditions, and are not limited here.

[0060] Reference Figure 2 In one embodiment, the display backlight control driving interface further includes a reserved function interface 100 , and the fourth pin and the twenty-third pin of the display backlight control driving interface serve as the reserved function interface 100 .

[0061] In this embodiment, the reserved functional interface 100 can be used to expand or improve the flexibility of future development; for example, it can be used as a brightness adjustment interface, a PWM control interface, a protection signal interface, a temperature monitoring interface, a fault indication interface, and a communication interface. It is understandable that in actual applications, the number of specific reserved functional interfaces 100 can be adjusted according to actual conditions, and is not limited here.

[0062] In one embodiment, the display screen backlight control drive interface is packaged in a 32-pin SMD horizontal circuit board package.

[0063] In this embodiment, the display backlight control drive interface may include the dual-channel serial communication data interface 10, the online program upgrade interface 20, the self-test enable interface 30, the backlight enable interface 40, the backlight preparation feedback interface 50, the abnormal interrupt interface 60, the frame synchronization interface 70, the backlight power supply interface 80, the ground interface 90 and the reserved function interface 100 in the above-mentioned embodiment, with a total of thirty-two pins; therefore, the display backlight control drive interface can adopt a thirty-two-pin SMD horizontal circuit board package, and the specific package diagram can be referred to Figure 3 It can be matched with the structure design of ultra-thin TVs. At the same time, each pin can support a maximum current of 0.5A. According to the interface definition of this solution, it can be applied to the backlight system drive of 10,000-level partition MiniLED backlight TVs within 110 inches.

[0064] The invention also provides a backlight driving system.

[0065] Reference Figure 4 In one embodiment, the backlight driving system includes a main control module, a backlight control module and the display screen backlight control driving interface as described above, and the main control module and the backlight control module are connected via the display screen backlight control driving interface. It can be understood that since the display screen backlight control driving interface is used in the backlight driving system of the present invention, the embodiments of the backlight driving system of the present invention include all technical solutions of all embodiments of the display screen backlight control driving interface, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0066] Reference Figure 4 In one embodiment, the main control module includes a power module and a control chip, the power module is used to supply power to the backlight control module, and the control chip is used to control the operation of the backlight control module:

[0067] The backlight control module is used to connect the backlight area of ​​the display screen. The backlight control module includes a DC conversion circuit, a right half screen backlight controller and a left half screen backlight controller. The DC conversion circuit is used to convert the voltage output by the power module into DC and then output it. The right half screen backlight controller is used to control the right half screen of the backlight area of ​​the display screen. The left half screen backlight controller is used to control the left half screen of the backlight area of ​​the display screen.

[0068] In this embodiment, the power module can provide a 12V power supply voltage for the backlight control module, and the control chip can be a system on chip (System on Chip, SOC for short). The control chip realizes the functions of data transmission, signal reception and enabling control of the backlight control module. The DC conversion circuit can perform a DC boost conversion or a DC buck conversion on the voltage output by the power module and output it to the electrical device to provide a suitable working voltage. The right half-area picture backlight controller can be used to control the right half-area picture of the backlight area of ​​the display screen, and the left half-area picture backlight controller is used to control the left half-area picture of the backlight area of ​​the display screen.

[0069] The present invention also provides a display device.

[0070] In one embodiment, the display device includes the backlight driving system as described above. It is understandable that, since the backlight driving system is used in the display device of the present invention, the embodiment of the display device of the present invention includes all technical solutions of all embodiments of the backlight driving system, and the technical effects achieved are also exactly the same, which will not be described in detail here.

[0071] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A display screen backlight control drive interface, used to connect a main control module and a backlight control module, characterized in that: The display screen backlight control drive interface includes: A dual-channel serial communication data interface, used to enable the main control module to transmit the backlight control data signal to the backlight control module; Online program upgrade interface, used to enable the main control module to set the registers of the backlight control module; A self-test enable interface, used to enable the main control module to control the switch of the self-test function of the backlight control module; Backlight enable interface, used to enable the main control module to control the switch of the backlight control module; Backlight preparation feedback interface, used to enable the backlight control module to output a working state ready signal to the main control module; Abnormal interrupt interface, used to make the backlight control module output abnormal status signal to the main control module; The frame synchronization interface is used to enable the backlight control module to control the synchronous display of the backlight and the video image.

2. The display screen backlight control driving interface according to claim 1, characterized in that: The backlight control module includes a right half-area picture backlight controller and a left half-area picture backlight controller, and the dual-channel serial communication data interface includes: A first communication interface is connected to the right half picture backlight controller and is used to enable the main control module to transmit the right half picture backlight control data signal to the right half picture backlight controller; The second communication interface is connected to the left half area picture backlight controller and is used to enable the main control module to transmit the left half area picture backlight control data signal to the left half area picture backlight controller.

3. The display screen backlight control driving interface according to claim 2, characterized in that: The seventh pin, the ninth pin, the eleventh pin and the thirteenth pin of the display backlight control drive interface are used as the first communication interface, and the fifteenth pin, the seventeenth pin, the nineteenth pin and the twenty-first pin of the display backlight control drive interface are used as the second communication interface, and the pins of the first communication interface and the pins of the second communication interface are both designed with ground isolation.

4. The display screen backlight control driving interface according to claim 1, characterized in that: The fifth pin of the display screen backlight control and drive interface is used as the frame synchronization interface, the twenty-second pin of the display screen backlight control and drive interface is used as the backlight enable interface, the twenty-fourth pin of the display screen backlight control and drive interface is used as the abnormal interrupt interface, the twenty-fifth pin of the display screen backlight control and drive interface is used as the backlight preparation feedback interface, the twenty-sixth pin of the display screen backlight control and drive interface is used as the self-test enable interface, and the twenty-eighth and twenty-ninth pins of the display screen backlight control and drive interface are used as the online program upgrade interface.

5. The display screen backlight control driving interface according to claim 1, characterized in that: The display screen backlight control drive interface also includes a backlight power supply interface and a ground interface. The first pin to the third pin of the display screen backlight control drive interface are used as the backlight power supply interface, and the sixth pin, the eighth pin, the tenth pin, the twelfth pin, the fourteenth pin, the sixteenth pin, the eighteenth pin, the twentieth pin, the twenty-seventh pin and the thirtieth pin to the thirty-second pin of the display screen backlight control drive interface are used as ground interfaces.

6. The display screen backlight control driving interface according to claim 1, characterized in that: The display screen backlight control driving interface also includes a reserved function interface, and the fourth pin and the twenty-third pin of the display screen backlight control driving interface serve as the reserved function interface.

7. The display screen backlight control driving interface according to claim 1, characterized in that: The display screen backlight control drive interface is packaged in a 32-pin SMD horizontal circuit board package.

8. A backlight driving system, characterized in that: It comprises a main control module, a backlight control module and a display screen backlight control driving interface as claimed in any one of claims 1 to 7, wherein the main control module and the backlight control module are connected via the display screen backlight control driving interface.

9. The backlight driving system according to claim 8, characterized in that: The main control module includes a power module and a control chip, wherein the power module is used to supply power to the backlight control module, and the control chip is used to control the operation of the backlight control module: The backlight control module is used to connect the backlight area of ​​the display screen. The backlight control module includes a DC conversion circuit, a right half screen backlight controller and a left half screen backlight controller. The DC conversion circuit is used to convert the voltage output by the power module into DC and then output it. The right half screen backlight controller is used to control the right half screen of the backlight area of ​​the display screen. The left half screen backlight controller is used to control the left half screen of the backlight area of ​​the display screen.

10. A display device, characterized in that: It comprises the backlight driving system as described in any one of claims 8 to 9.

Images