Backlight control system and method, circuit board, equipment and storage medium

Abstract

The invention provides a backlight control system and method, a circuit board, equipment and a storage medium, relates to the technical field of display equipment, and solves the problem that backlight display is difficult to realize in integrated large-screen equipment adopting eDP display signals. Therefore, the CPU module can lighten the screen after the display preparation of the screen is completed, so that the equipment can realize a backlight display function, and the problems of blurred screen, splash screen and the like are effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a backlight control system, method, circuit board, device and storage medium. Background Art

[0002] In conference rooms, classrooms and other scenes, integrated large-screen devices are usually equipped to display corresponding charts, graphics and texts. In integrated large-screen devices, backlight brightness is usually adjusted through backlight control, so that the display can provide better resolution and image clarity.

[0003] In the related technology, a signal conversion chip is usually used to convert the HDMI (High Definition Multimedia Interface) display signal output by the mainboard into a VBO (V-By-One) display signal. After determining that the signal conversion chip and the display module have successfully communicated, the MCU (Microcontroller Unit) controls the backlight power supply to start working, so as to power the backlight of the display screen, thereby lighting up the screen and displaying the corresponding picture normally.

[0004] However, the solution provided by the related technology cannot be applied to all-in-one large-screen devices that mainly use OPS (Open Pluggable Specification) to provide eDP (Embedded Display Port) signals. If the device adopts the solution of the related technology, the device cannot know when the screen is ready for display, and problems such as screen distortion and screen flickering may occur, resulting in failure to display normally. Summary of the invention

[0005] The present application provides a backlight control system, method, circuit board, device and storage medium, which solves the problem that it is difficult to achieve backlight display in an integrated large-screen device using an eDP display signal.

[0006] In a first aspect, the present application provides a backlight control system, which is applied to an integrated large-screen device, wherein the integrated large-screen device includes a display panel and a backlight control system, and the backlight control system includes a CPU module, a signal conversion module, an MCU module, a backlight power module, a display interface module, and a display driver module;

[0007] The signal output terminal of the CPU module is connected to the input terminal of the signal conversion module, and the signal output terminal of the CPU module is used to output the eDP display signal;

[0008] The output end of the signal conversion module is connected to the input end of the display interface module, and the detection end of the signal conversion module is also connected to the communication control end of the display interface module. The signal conversion module is used to convert the received eDP display signal into a target display signal and transmit it to the display interface module, and respond to the target level signal detected by the detection end of the signal conversion module, and output an interrupt signal through the interrupt output end;

[0009] The signal receiving end of the MCU module is connected to the interrupt output end of the signal conversion module, and the signal feedback end of the MCU module is connected to the signal receiving end of the CPU module. The MCU module is used to output a feedback signal to the CPU module when receiving an interrupt signal output by the signal conversion module;

[0010] The input end of the backlight power module is connected to the backlight control end of the CPU module, and the backlight control end of the CPU module is used to output a control signal for controlling the display panel to perform backlight display and backlight brightness adjustment after receiving the feedback signal;

[0011] The output end of the backlight power module is connected to the display panel, and the backlight power module is used to provide backlight power for the display panel;

[0012] The input end of the display driving module is connected to the output end of the display interface module, and the display driving module is used to drive the display panel according to the received target display signal.

[0013] In a second aspect, the present application further provides a backlight control method, which is applied to an integrated large-screen device, and the method includes:

[0014] In response to the received display instruction, an eDP display signal is output, and a feedback signal is waited for, where the feedback signal is a signal sent by the MCU module in response to the interrupt signal output by the signal conversion module;

[0015] When receiving the feedback signal, determining that the display panel is in a startup ready state;

[0016] When it is determined that the display panel is in a startup preparation state, a backlight display signal is output according to the set working state information to control the display panel to enter a backlight display state;

[0017] In response to an adjustment instruction for adjusting the backlight brightness of the display panel, a backlight adjustment signal is generated, and the backlight adjustment signal is used to adjust the backlight brightness of the display panel to a brightness value corresponding to the adjustment instruction.

[0018] In a third aspect, the present application also provides a backlight control circuit board, which includes a backlight control system as provided in the first aspect.

[0019] In a fourth aspect, the present application further provides an integrated large-screen device, which includes the circuit board provided in the third aspect, and further includes:

[0020] one or more processors;

[0021] The storage device is used to store one or more programs. When the one or more programs are executed by one or more processors, the one or more processors implement the backlight control method provided in the second aspect.

[0022] In a fifth aspect, the present application also provides a storage medium storing computer executable instructions, which, when executed by a processor, are used to execute the backlight control method provided in the second aspect.

[0023] The present application scheme outputs an interrupt signal after detecting the target level signal through the signal conversion module, so that the MCU module feeds back to the CPU module to assist the CPU module in determining that the display panel is in a startup preparation state, and then the CPU module outputs a backlight display signal to light up the screen after the screen completes the display preparation, effectively avoiding the occurrence of problems such as screen distortion and screen flickering; and the scheme can also enable the device to respond to display instructions and adjustment instructions through the backlight control system, thereby providing users with the function of adjusting the backlight brightness in the operating system, providing users with a simpler backlight brightness adjustment solution, and effectively improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A principle block diagram of a backlight control system provided in one embodiment of the present application;

[0025] Figure 2 A flowchart of the backlight control method provided in one embodiment of the present application;

[0026] Figure 3 A flowchart of the steps of outputting a backlight display signal provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of an integrated large-screen device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0028] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are only used to explain the embodiments of the present application, rather than to limit the embodiments of the present application. It should also be noted that, for ease of description, only the parts related to the embodiments of the present application rather than all structures are shown in the accompanying drawings, and those skilled in the art should be able to think of it after reading the specification of this application that as long as the technical features do not contradict each other, any combination of the technical features can constitute an optional implementation method.

[0029] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally a class, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship. In the description of the present application, "multiple" means two or more, and "several" means one or more.

[0030] In the related art, the existing integrated large-screen device includes components such as a display module, a whole machine module, and a main control module. Among them, the display module includes a display screen and a backlight assembly. The display screen is used to display images, such as a liquid crystal display device or other types of display devices, and the backlight assembly is used to provide a backlight source for the display screen. Optionally, the integrated large-screen device may also include a touch component, and the touch component is arranged on the display screen or at the front end of the display screen to collect touch-related data generated by the user's touch operation, and send the collected data to the whole machine module for processing.

[0031] As a built-in module of the integrated large-screen device, the whole machine module runs a low-performance Android system inside. The whole machine module is used to realize the display processing and touch data processing functions of the integrated large-screen device. The hardware configuration of the whole machine module is relatively low. In addition to configuring the operating system (such as the above-mentioned Android system) and basic applications, it does not support the installation of other application software. If the large-screen device needs to realize other functions, such as file display function, it needs to be connected to the main control module separately and realized through the relevant applications installed on the main control module.

[0032] Specifically, the whole machine module includes a main control board, on which a main control chip and peripheral circuits of the main control chip, such as a power supply circuit, etc., are arranged, and multiple communication interfaces for communication are also arranged, and multiple communication interfaces are connected to the main control chip. The above-mentioned communication interface can be a Universal Serial Bus (USB) interface, a High Definition Multimedia Interface (HDMI), a Type-C interface, a Video Graphics Array (VGA) interface or a touch line port (Touch out port).

[0033] The main control module can be a pluggable (OPS, Open Pluggable Specification) module on the integrated large-screen device, and the application software running on the integrated large-screen device is installed on the main control module. The operating system running on the main control module can be Windows, a high-performance Android system, etc., and correspondingly, the main control module can adopt a PC (Personal Computer, personal computer) module, a high-performance Android module, etc.

[0034] Therefore, in the related art, the SOC (System-on-a-Chip) processor on the whole module of the large-screen device adopts the Android system. During the backlight display process, the large-screen device outputs the HDMI display signal through the SOC processor on the whole module, and then uses the signal conversion chip to convert the HDMI display signal into a VBO display signal. After the SOC processor determines that the signal conversion chip and the display module have successfully communicated, it controls the backlight power supply through the MCU module to start working to light up the screen.

[0035] However, with the development of integrated design, in order to make the system more concise, the integrated large-screen device adopts the method of connecting the OPS module to the display screen, that is, the backlight display of the display screen is controlled by the OPS module, and the display signal provided by the OPS module is the eDP display signal. That is, in actual applications, some integrated large-screen devices use eDP display signals to convert other display signals to display the corresponding image on the display screen. For example, the eDP display signal is converted into display signals such as VBO or LVDS (Low-VoltageDifferential Signaling) to realize the display function. However, for the above-mentioned integrated large-screen device, the OPS module cannot determine whether the signal conversion chip and the display module have successfully communicated, that is, the OPS module cannot know when the display module has completed the display preparation, which is prone to problems such as screen distortion and screen flashing, resulting in the inability to display the corresponding content normally on the display screen.

[0036] To this end, the present application provides a backlight control system. Figure 1 This is a principle block diagram of a backlight control system provided in an embodiment of the present application. The backlight control system is applied to an integrated large-screen device. The backlight control system 100 includes a CPU module 110, a signal conversion module 120, an MCU module 130, a backlight power module 140, a display interface module 150, and a display driver module 160. It can be understood that the CPU module 110 is an OPS module in the integrated large-screen device, that is, the CPU module 110 runs a corresponding operating system as a main control module to control the backlight.

[0037] It can be imagined that the display panel 200 in the integrated large-screen device is a device used to determine parameters such as brightness, contrast, and color in the display screen, and it is connected to the backlight control system 100, that is, the backlight control system 100 can control the color, backlight brightness and other parameters of the display panel 200.

[0038] Specifically, the signal output end of the CPU module 110 is connected to the input end of the signal conversion module 120, the signal output end of the signal conversion module 120 is connected to the display interface module 150, and the detection end of the signal conversion module 120 is also connected to the communication control end of the display interface module 150. The output end of the display interface module 150 is connected to the input end of the display driver module 160, and the output end of the display driver module 160 is connected to the display panel 200.

[0039] The signal receiving end of the MCU module 130 is connected to the interrupt output end of the signal conversion module 120, and the signal feedback end of the MCU module 130 is connected to the signal receiving end of the CPU module 110. The backlight control end of the CPU module 110 is connected to the input end of the backlight power module 140, and the output end of the backlight power module 140 is connected to the display panel 200.

[0040] It is understandable that the CPU module 110 outputs the eDP display signal through the signal output terminal thereof and transmits it to the input terminal of the signal conversion module 120 , so that the eDP signal is converted into a target display signal through the signal conversion module 120 and transmitted to the display interface module 150 .

[0041] After the display interface module 150 receives the target display signal, in addition to transmitting the target display signal to the display driver module 160 through its output terminal, the display interface module 150 also controls the level change of the detection end of the signal conversion module 120 connected thereto through its communication control terminal, so as to output the target level signal to the signal conversion module 120, so that the signal conversion module 120 outputs an interrupt signal to the MCU module 130 through the interrupt output terminal in response to the target level signal.

[0042] When the MCU module 130 receives an interrupt signal through the signal receiving end, the MCU module 130 transmits a feedback signal to the signal receiving end of the CPU through the signal feedback end, that is, the interrupt signal output by the signal conversion module 120 can trigger the MCU module 130 to feedback to the CPU to indicate that the current display panel 200 is in a startup preparation state.

[0043] Furthermore, the CPU module 110 can determine that the current display panel 200 is in a startup preparation state according to the received feedback signal. Therefore, the CPU module 110 can output a control signal to the backlight power module 140 through the backlight control terminal, and the control signal is used to control the display panel 200 to perform backlight display and backlight brightness adjustment. Moreover, after receiving the target display signal, the display driver module 160 drives the display panel 200 according to the target display signal. Therefore, while driving the display panel 200, the backlight power module 140 supplies power to backlight sources such as LED (Light-Emitting Diode), OLED (Organic Electroluminescence Display), etc., and controls the backlight brightness, so as to light up the screen and display the picture normally.

[0044] It can be seen from the above scheme that the signal conversion module outputs an interrupt signal after detecting the target level signal, so that the MCU module feeds back to the CPU module to assist the CPU module in determining that the display panel is in a startup preparation state, and then the CPU module outputs a backlight display signal to realize the backlight display and brightness adjustment functions of the integrated large-screen device using the eDP display signal, and lights up the screen after the screen completes the display preparation, effectively avoiding the occurrence of problems such as flowery screen and flashing screen.

[0045] In one embodiment, the backlight control terminal of the CPU module includes a power supply control pin, a start control pin and a brightness control pin, and the power supply control pin, the start control pin and the brightness control pin are all connected to the backlight power supply module. Among them, the power supply control pin is used to output a first control signal for controlling the backlight power supply module to supply power to the display panel, and the start control pin is used to output a second control signal for controlling the backlight power supply module to start the backlight display function of the display panel, and the brightness control pin is used to output a third control signal for controlling the backlight brightness of the display panel.

[0046] It is conceivable that the CPU module can output corresponding control signals through the power supply control pin, the start control pin and the brightness control pin to control the backlight display of the display panel. Moreover, during the backlight display process, the CPU module can respond to the user's control instructions to adjust the backlight brightness. Specifically, the CPU module adjusts the backlight brightness by controlling the output of the brightness control pin.

[0047] Therefore, the solution can use the power supply control pin, the start control pin and the brightness control pin on the CPU module to control the backlight display. Moreover, the solution can quickly and easily adjust the backlight brightness by controlling the brightness control pin.

[0048] In one embodiment, the communication control end of the display interface module includes a first signal pin and a second signal pin, and correspondingly, the detection end of the signal conversion module includes a first control pin and a second control pin. Taking the conversion of the eDP display signal to the VBO display signal as an example, when the display interface module is not connected to the display driver module, the first signal pin is in a high level state; and when the display driver module connected to the display interface module is connected to work, the first signal pin is in a low level state.

[0049] The display interface module enters the CDR training (clock data recovery training) mode, and correspondingly, the second signal pin is also set to a low level state, and then enters the ALN training (Align training) mode to perform data transmission.

[0050] That is, after the converted output VBO display signal can successfully communicate with the display driver module, the first signal pin and the second signal pin are both in a low level state. Therefore, the detection end of the signal conversion module (such as the first control pin and the second control pin thereon) detects that the first signal pin and the second signal pin are both in a low level state, and then the interrupt output end of the signal conversion module outputs a recognizable interrupt signal to the MCU module, so as to inform the CPU module through the MCU module that the current display panel is in a startup preparation state.

[0051] Therefore, the solution can trigger the signal conversion module to output an interrupt signal through the set target level signal, and then trigger the MCU module to send a feedback signal to the CPU module, so that the CPU module knows that the current display panel is in a startup preparation state, so that the CPU module can control the backlight display of the display panel at the correct time, effectively reducing the occurrence of screen noise and screen flickering problems.

[0052] It should be noted that, in one embodiment, the signal feedback end of the MCU module and the signal receiving end of the CPU module are both provided with a serial communication interface, that is, serial communication is performed between the MCU module and the CPU module, thereby realizing signal transmission from the MCU module to the CPU module, reducing the number of I / O interfaces occupied by the CPU module, and reducing communication costs.

[0053] In some embodiments, the target display signal is a VBO display signal, and correspondingly, the signal conversion module includes a signal conversion chip, such as an LT8668 chip, to realize the conversion of the eDP signal into a VBO signal. Of course, in some embodiments, the target display signal is an LVDS signal, and correspondingly, the signal conversion module includes a CS5211 chip to realize the conversion of the eDP display signal into an LVDS signal.

[0054] Figure 2 A flow chart of the steps of a backlight control method provided in an embodiment of the present application, the method is applied to the above-mentioned integrated large-screen device (hereinafter referred to as the device), such as being executed by a CPU module, such as Figure 2 As shown, the method comprises the following steps:

[0055] Step S210: In response to the received display instruction, output the eDP display signal, and wait for a feedback signal, where the feedback signal is a signal sent by the MCU module in response to the interrupt signal output by the signal conversion module.

[0056] It is conceivable that the display instruction may be a self-triggered instruction when the device is turned on, or may be a user-triggered instruction, such as when the user presses a display screen switch button of the device to trigger the display instruction.

[0057] After receiving the display instruction, the CPU module of the device responds to the display instruction and outputs the eDP signal, and performs signal monitoring to wait for the MCU module to output a feedback signal, which is a signal sent by the MCU module in response to the interrupt signal output by the signal conversion module. That is, after the signal conversion module outputs the interrupt signal, the MCU module will send a feedback signal to the CPU module after receiving the interrupt signal. Therefore, the CPU module needs to wait for the delivery of the feedback signal to determine whether the display panel is in the startup preparation state.

[0058] Step S220: When the feedback signal is received, it is determined that the display panel is in a startup ready state.

[0059] Step S230: When it is determined that the display panel is in the startup preparation state, a backlight display signal is output according to the set working state information to control the display panel to enter the backlight display state.

[0060] After receiving the feedback signal, the CPU module of the device can determine that the display panel is in the startup preparation state, and then the CPU module outputs a backlight display signal to control the display panel to enter the backlight display state. Among them, the backlight display signal is generated according to the set working state information. It can be imagined that the above working state information can be pre-set in the operating system of the device, so that when the device is turned on, the backlight display is realized according to the corresponding backlight brightness, contrast, color and other parameters in the working state information.

[0061] In addition, in one embodiment, the working status information includes historical brightness parameters so that after the device is turned off and then turned on again, the backlight brightness before the screen is turned off is maintained. The backlight display signal includes a backlight power supply signal, a backlight start signal and a backlight brightness signal. Figure 3 A flowchart of the steps of outputting a backlight display signal provided in an embodiment of the present application is shown as follows: Figure 3 As shown, the specific steps are as follows:

[0062] Step S310: when the display panel is in a startup preparation state, output a backlight power supply signal and a backlight startup signal, control the backlight power module to provide backlight power to the display panel, and control the display panel to start the backlight display function.

[0063] Step S320: determine the target backlight brightness of the display panel according to the historical brightness parameters carried in the working status information, and generate a backlight brightness signal to control the display panel to enter a backlight display state according to the target backlight brightness.

[0064] It is understandable that after the CPU module determines that the display panel is in the startup preparation state, the CPU module outputs a backlight power supply signal and a backlight startup signal. For example, the CPU can determine that the display panel is in the startup preparation state through the feedback signal, and then output the backlight power supply signal through the power supply control pin on the CPU module to control the backlight power supply module to provide backlight power to the display panel; and output the backlight startup signal through the startup control pin on the CPU module to control the display panel to start the backlight display function.

[0065] The CPU module also determines the target backlight brightness that the display panel currently needs to provide based on the historical brightness parameters, and then generates a backlight brightness signal. For example, after the CPU module generates a backlight brightness signal based on the target backlight brightness (such as the backlight brightness before the screen is turned off), it outputs the backlight brightness signal to the backlight power module through the brightness control pin on it to control the display panel to enter the backlight display state according to the target backlight signal, so that the display panel restores the backlight brightness before the screen is turned off.

[0066] Therefore, by recording the backlight brightness before the screen is turned off through historical brightness parameters, the device can restore the backlight brightness of the display panel before the screen is turned off when the screen is turned on, which helps to improve the user experience.

[0067] Step S240 , in response to an adjustment instruction for adjusting the backlight brightness of the display panel, generating a backlight adjustment signal, wherein the backlight adjustment signal is used to adjust the backlight brightness of the display panel to a brightness value corresponding to the adjustment instruction.

[0068] The present solution can also adjust the backlight brightness of the display panel. It is understandable that when the user needs to adjust the backlight brightness of the display panel, the user can input an adjustment instruction in the device to adjust the backlight brightness of the display panel. For example, an adjustment panel corresponding to the backlight brightness is provided in the operating system of the device. Therefore, when the user needs to adjust the backlight brightness, the adjustment panel can be called out in the display interface of the device, and the backlight brightness parameter to be adjusted can be input on the adjustment panel, thereby realizing the input of the adjustment instruction.

[0069] In some embodiments, the adjustment panel may carry a slider corresponding to the backlight brightness, so that the user can input the backlight brightness parameters by sliding the slider; the adjustment panel may carry an input box corresponding to the backlight brightness, so that the user can input the backlight brightness parameters in the input box.

[0070] The CPU module generates a backlight adjustment signal in response to the adjustment instruction, and outputs the backlight adjustment signal to the backlight power module, for example, outputs the backlight adjustment signal through the brightness control pin on the CPU module. The backlight adjustment signal carries parameter information corresponding to the brightness value, so that the backlight brightness of the display panel is adjusted to the brightness value corresponding to the adjustment instruction.

[0071] From the above scheme, it can be seen that the device responds to display instructions and adjustment instructions through the backlight control system. It can not only light up the screen at the right time to achieve backlight display, but also provide users with the function of adjusting the backlight brightness in the operating system, providing users with a simpler backlight brightness adjustment solution, effectively improving the user experience.

[0072] Exemplarily, in an integrated large-screen device using an eDP display signal, the integrated large-screen device is provided with the backlight control system shown in the above embodiment. When the device is turned on, the CPU module can output the eDP display signal, and the signal conversion module converts the signal into a target display signal, which is then transmitted to the display interface module. The display interface module transmits the target display signal to the display driver module, and after the display panel is in the startup state, outputs the target level signal to the signal conversion module.

[0073] The signal conversion module can determine that the display panel is already in the startup state through the target level signal detected by the detection terminal on it, and then send an interrupt signal to the MCU module, so that the CPU module can learn from the MCU module that the display panel is in the startup preparation state. Therefore, after determining that the display panel is in the startup preparation state, the CPU module outputs a backlight display signal to realize backlight display and light up the screen.

[0074] During normal display of the device, the user can adjust the backlight brightness on the display screen of the device, that is, there is a corresponding backlight brightness adjustment panel in the device operating system for the user to adjust the backlight brightness. Therefore, the user can adjust the backlight brightness according to the display needs in the device to obtain a better user experience.

[0075] The present application also provides a backlight control circuit board, which includes the backlight control system provided in the above embodiment. It is understandable that the backlight control circuit board can be applied to devices that require backlight display, such as integrated large-screen devices, to achieve backlight display and backlight brightness adjustment in the system, and in integrated large-screen devices using eDP display signals, the screen can be lit at the appropriate time, effectively avoiding problems such as screen distortion and screen flicker.

[0076] Figure 4 This is a schematic diagram of the structure of an integrated large-screen device provided in an embodiment of the present application, which is used to execute the backlight control method provided in the above embodiment and has functional modules and beneficial effects corresponding to the execution method. The device includes the backlight control circuit board of the above embodiment, and the circuit board carries the backlight control circuit shown in the above embodiment.

[0077] In addition, as shown in the figure, the device also includes a processor 401, a memory 402, an input device 403 and an output device 404. The number of processors 401 can be one or more, and one processor 401 is taken as an example in the figure; the processor 401, the memory 402, the input device 403 and the output device 404 can be connected via a bus or other means, and the figure takes the connection via a bus as an example. The memory 402, as a computer-readable storage medium, can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the backlight control method in the embodiment of the present application. The processor 401 executes various corresponding functional applications and data processing by running the software programs, instructions and modules stored in the memory 402, that is, realizing the above-mentioned backlight control method.

[0078] The memory 402 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data recorded or created during use, etc. In addition, the memory 402 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 402 may further include a memory remotely arranged relative to the processor 401, and these remotely arranged memories may be connected to the terminal device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0079] The input device 403 can be used to input corresponding digital or character information to the processor 401, and to generate key signal input related to the user settings and function control of the device; the output device 604 can be used to send or display key signal output related to the user settings and function control of the device.

[0080] An embodiment of the present application further provides a storage medium storing computer executable instructions, which, when executed by a processor, are used to perform relevant operations in the backlight control method provided in any embodiment of the present application.

[0081] Computer-readable storage media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0082] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0083] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A backlight control system, characterized in that: Applied to an integrated large-screen device, the integrated large-screen device includes a display panel and the backlight control system, the backlight control system includes a CPU module, a signal conversion module, an MCU module, a backlight power module, a display interface module and a display driver module; The signal output end of the CPU module is connected to the input end of the signal conversion module, and the signal output end of the CPU module is used to output the eDP display signal; The output end of the signal conversion module is connected to the input end of the display interface module, and the detection end of the signal conversion module is also connected to the communication control end of the display interface module. The signal conversion module is used to convert the received eDP display signal into a target display signal and transmit it to the display interface module, and respond to the target level signal detected by the detection end of the signal conversion module, and output an interrupt signal through the interrupt output end; The signal receiving end of the MCU module is connected to the interrupt output end of the signal conversion module, and the signal feedback end of the MCU module is connected to the signal receiving end of the CPU module, and the MCU module is used to output a feedback signal to the CPU module when receiving an interrupt signal output by the signal conversion module; The input end of the backlight power module is connected to the backlight control end of the CPU module, and the backlight control end of the CPU module is used to output a control signal for controlling the display panel to perform backlight display and backlight brightness adjustment after receiving the feedback signal; The output end of the backlight power module is connected to the display panel, and the backlight power module is used to provide backlight power for the display panel; The input end of the display driving module is connected to the output end of the display interface module, and the display driving module is used to drive the display panel according to the received target display signal.

2. The backlight control system according to claim 1, characterized in that: The backlight control terminal of the CPU module includes a power supply control pin, a start control pin and a brightness control pin; The power supply control pin, the start control pin and the brightness control pin are all connected to the backlight power module. The power supply control pin is used to output a first control signal that controls the backlight power module to supply power to the display panel. The start control pin is used to output a second control signal that controls the backlight power module to turn on the backlight display function of the display panel. The brightness control pin is used to output a third control signal that controls the backlight brightness of the display panel.

3. The backlight control system according to claim 1, characterized in that: The communication control end of the display interface module includes a first signal pin and a second signal pin, and the detection end of the signal conversion module includes a first control pin and a second control pin; The first signal pin is connected to the first control pin, and the first signal pin is used to control the level change of the first control pin; The second signal pin is connected to the second control pin, and the second signal pin is used to control a level change of the second control pin.

4. The backlight control system according to claim 1, characterized in that: The signal feedback end of the MCU module and the signal receiving end of the CPU module are both provided with a serial communication interface, and the CPU module and the MCU module are connected in serial communication via the serial communication interface.

5. The backlight control system according to any one of claims 1 to 4, characterized in that: The target display signal is a VBO display signal or a LVDS display signal.

6. A backlight control method, characterized in that: Applied to an integrated large-screen device, the integrated large-screen device comprises a display panel and a backlight control system according to any one of claims 1 to 5, the method comprising: In response to the received display instruction, an eDP display signal is output, and a feedback signal is waited for, wherein the feedback signal is a signal sent by the MCU module in response to the interrupt signal output by the signal conversion module; When the feedback signal is received, determining that the display panel is in a startup ready state; When it is determined that the display panel is in a startup preparation state, outputting a backlight display signal according to set working state information to control the display panel to enter a backlight display state; In response to an adjustment instruction for adjusting the backlight brightness of the display panel, a backlight adjustment signal is generated, wherein the backlight adjustment signal is used to adjust the backlight brightness of the display panel to a brightness value corresponding to the adjustment instruction.

7. The backlight control method according to claim 6, characterized in that: The working status information includes historical brightness parameters, and the backlight display signal includes a backlight power supply signal, a backlight start signal and a backlight brightness signal; When it is determined that the display panel is in a startup preparation state, outputting a backlight display signal according to set working state information to control the display panel to enter a backlight display state includes: When the display panel is in a startup preparation state, outputting the backlight power supply signal and the backlight startup signal, controlling the backlight power supply module to provide backlight power to the display panel and controlling the display panel to start a backlight display function; According to the historical brightness parameters carried by the working status information, the target backlight brightness of the display panel is determined, and the backlight brightness signal is generated to control the display panel to enter the backlight display state according to the target backlight brightness.

8. A backlight control circuit board, characterized in that: Comprising a backlight control system as described in any one of claims 1-5.

9. An integrated large-screen device, characterized in that: The backlight control circuit board according to claim 8, wherein the integrated large-screen device further comprises: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the backlight control method as described in any one of claims 6-7.

10. A storage medium storing computer executable instructions, characterized in that: When the computer executable instructions are executed by a processor, they are used to perform the backlight control method according to any one of claims 6 to 7.

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