Automatic light supplementing method and system for liquid crystal screen

Abstract

The invention relates to the technical field of liquid crystal screen light supplement, in particular to a liquid crystal screen automatic light supplement method and system. When it is detected that a liquid crystal screen enters a face recognition program, a display area of the liquid crystal screen is divided into a face recognition area and a light supplementing area, and the light supplementing area is located on the periphery of the face recognition area; obtaining color RGB video frame data through an RGB camera of the liquid crystal screen, and obtaining a video illumination value according to the color RGB video frame data; and according to the video illumination value, controlling the working state of the light supplementing area and adjusting parameter setting of the light supplementing area to realize automatic light supplementing of the liquid crystal screen. Through the method, automatic light supplement is realized in combination with dynamic adjustment of ambient light detection and screen display content, the visibility and definition of a human face in a video are remarkably improved, meanwhile, a light supplement lamp is not needed on video source equipment, the dependence on an external light supplement lamp is reduced, the cost is reduced, the structural design difficulty is also reduced, man-machine interaction is more friendly, and the user experience is improved. And the environmental adaptability is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal screen fill light, and in particular to a liquid crystal screen automatic fill light method and system. Background Art

[0002] Currently, common face recognition fill-in lighting solutions on the market often use LEDs to increase brightness within the video source device. However, this approach can result in glare for users and increase equipment costs. Furthermore, LED installation places high demands on the assembly environment, which is often difficult to meet due to practical limitations. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a method and system for automatic light filling of a liquid crystal screen to solve the problems pointed out in the above background technology.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: A method for automatically filling light for a liquid crystal screen comprises the following steps: S1. When detecting that the LCD screen enters a face recognition program, dividing the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area; S2. Obtain color RGB video frame data through the RGB camera of the LCD screen, and obtain the video illumination value according to the color RGB video frame data; S3. Control the working state of the fill light area according to the video illumination value and adjust the parameter setting of the fill light area to realize automatic fill light of the LCD screen.

[0005] Furthermore, step S3 is specifically as follows: Determining whether the video illumination value is less than a first preset threshold; If yes, the working state of the fill light area is controlled to be enabled; If not, determining whether the video illumination value is greater than a second preset threshold value, and if so, controlling the working state of the fill light area to be disabled; if not, controlling the working state of the fill light area to be enabled; The first preset threshold is smaller than the second preset threshold.

[0006] Furthermore, step S3 further includes: When the video illumination value is lower than the first preset threshold, the fill light value of the fill light area is set to the difference between the preset maximum fill light value and the video illumination value; wherein the preset maximum fill light value is greater than the first preset threshold; When the video illumination value is not less than the first preset threshold and not greater than the second preset threshold, the fill light value of the fill light area is set to a first preset constant fill light value; wherein the first preset constant fill light value is between the first preset threshold and the second preset threshold; When the video illumination value is greater than the second preset threshold, the fill light value of the fill light area is set to a second preset constant fill light value; wherein the second preset constant fill light value is less than the first preset threshold.

[0007] Furthermore, the first preset threshold is 20 Lux, the second preset threshold is 50 Lux, the preset maximum fill light value is 50 Lux, the first preset constant fill light value is 30 Lux, and the second preset constant fill light value is 0 Lux.

[0008] Furthermore, step S3 further includes: Determine whether there is portrait data in the face recognition area of the LCD screen. If so, calculate the deviation between the center position of the portrait data and the center position of the face recognition area, and adjust the area parameter setting of the fill light area according to the deviation.

[0009] An automatic light fill system for a liquid crystal display screen includes a processor and a memory. The memory stores a program or instruction. When the program or instruction is executed by the processor, the following steps are implemented: S1. When detecting that the LCD screen enters a face recognition program, dividing the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area; S2. Obtain color RGB video frame data through the RGB camera of the LCD screen, and obtain the video illumination value according to the color RGB video frame data; S3. Control the working state of the fill light area according to the video illumination value and adjust the parameter setting of the fill light area to realize automatic fill light of the LCD screen.

[0010] Furthermore, when the program or instruction is executed by the processor, the following steps are specifically implemented: Determining whether the video illumination value is less than a first preset threshold; If yes, the working state of the fill light area is controlled to be enabled; If not, determining whether the video illumination value is greater than a second preset threshold value, and if so, controlling the working state of the fill light area to be disabled; if not, controlling the working state of the fill light area to be enabled; The first preset threshold is smaller than the second preset threshold.

[0011] Furthermore, when the program or instruction is executed by the processor, the following steps are also implemented: When the video illumination value is lower than the first preset threshold, the fill light value of the fill light area is set to the difference between the preset maximum fill light value and the video illumination value; wherein the preset maximum fill light value is greater than the first preset threshold; When the video illumination value is not less than the first preset threshold and not greater than the second preset threshold, the fill light value of the fill light area is set to a first preset constant fill light value; wherein the first preset constant fill light value is between the first preset threshold and the second preset threshold; When the video illumination value is greater than the second preset threshold, the fill light value of the fill light area is set to a second preset constant fill light value; wherein the second preset constant fill light value is less than the first preset threshold.

[0012] Furthermore, when the program or instruction is executed by the processor, the following steps are implemented: The first preset threshold is 20 Lux, the second preset threshold is 50 Lux, the preset maximum fill light value is 50 Lux, the first preset constant fill light value is 30 Lux, and the second preset constant fill light value is 0 Lux.

[0013] Furthermore, when the program or instruction is executed by the processor, the following steps are also implemented: Determine whether there is portrait data in the face recognition area of the LCD screen. If so, calculate the deviation between the center position of the portrait data and the center position of the face recognition area, and adjust the area parameter setting of the fill light area according to the deviation.

[0014] The beneficial effects of the present invention are: The present invention provides a method and system for automatically filling light for a liquid crystal display (LCD). When the LCD screen is detected to have entered a face recognition program, the method divides the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area. The method acquires color RGB video frame data through the LCD screen's RGB camera, and obtains a video illumination value based on the color RGB video frame data. The method controls the operating state of the fill light area and adjusts the parameter settings of the fill light area based on the video illumination value to achieve automatic fill light for the LCD screen. The above method combines ambient light detection with dynamic adjustment of screen display content to achieve automatic fill light, significantly improving the visibility and clarity of faces in the video. At the same time, no fill light is required on the video source device, reducing dependence on external fill lights, reducing costs, and also reducing the difficulty of structural design. Human-computer interaction is more user-friendly, and environmental adaptability is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a flow chart of the steps of a method for automatically filling light for a liquid crystal screen according to the present invention; Figure 2 Shown is a structural block diagram of an automatic light-filling system for a liquid crystal screen according to the present invention; Description of Figure Numbers: 1-Processor; 2-Memory. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figure 1 As shown, the present invention provides a liquid crystal screen automatic light filling method, comprising the following steps: S1. When detecting that the LCD screen enters a face recognition program, dividing the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area; S2. Obtain color RGB video frame data through the RGB camera of the LCD screen, and obtain the video illumination value according to the color RGB video frame data; S3. Control the working state of the fill light area according to the video illumination value and adjust the parameter setting of the fill light area to realize automatic fill light of the LCD screen.

[0017] From the above description, it can be seen that the present invention has the following beneficial effects: The present invention provides a method for automatically filling light for a liquid crystal display (LCD). When the LCD screen is detected to have entered a face recognition program, the method divides the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area. The method acquires color RGB video frame data through an RGB camera of the LCD screen, and obtains a video illumination value based on the color RGB video frame data. The method controls the operating state of the fill light area and adjusts the parameter settings of the fill light area based on the video illumination value to achieve automatic fill light for the LCD screen. The above method combines ambient light detection with dynamic adjustment of screen display content to achieve automatic fill light, significantly improving the visibility and clarity of faces in the video. At the same time, no fill light is required on the video source device, reducing dependence on external fill lights, reducing costs, and also reducing the difficulty of structural design. Human-computer interaction is more user-friendly, and environmental adaptability is greatly improved.

[0018] Furthermore, step S3 is specifically as follows: Determining whether the video illumination value is less than a first preset threshold; If yes, the working state of the fill light area is controlled to be enabled; If not, determining whether the video illumination value is greater than a second preset threshold value, and if so, controlling the working state of the fill light area to be disabled; if not, controlling the working state of the fill light area to be enabled; The first preset threshold is smaller than the second preset threshold.

[0019] From the above description, it can be seen that the video illumination value is used as a basis for judging whether to enable the fill light function, which facilitates automatic fill light.

[0020] Furthermore, step S3 further includes: When the video illumination value is lower than the first preset threshold, the fill light value of the fill light area is set to the difference between the preset maximum fill light value and the video illumination value; wherein the preset maximum fill light value is greater than the first preset threshold; When the video illumination value is not less than the first preset threshold and not greater than the second preset threshold, the fill light value of the fill light area is set to a first preset constant fill light value; wherein the first preset constant fill light value is between the first preset threshold and the second preset threshold; When the video illumination value is greater than the second preset threshold, the fill light value of the fill light area is set to a second preset constant fill light value; wherein the second preset constant fill light value is less than the first preset threshold.

[0021] It can be seen from the above description that the specific fill light value is determined by the magnitude relationship between the video illumination value and the first preset threshold value and the second preset threshold value, thereby realizing dynamic fill light adjustment.

[0022] Furthermore, the first preset threshold is 20 Lux, the second preset threshold is 50 Lux, the preset maximum fill light value is 50 Lux, the first preset constant fill light value is 30 Lux, and the second preset constant fill light value is 0 Lux.

[0023] From the above description, it can be seen that the above specific parameters are used to achieve dynamic fill light.

[0024] Furthermore, step S3 further includes: Determine whether there is portrait data in the face recognition area of the LCD screen. If so, calculate the deviation between the center position of the portrait data and the center position of the face recognition area, and adjust the area parameter setting of the fill light area according to the deviation.

[0025] From the above description, it can be seen that through the above method, the area of the fill light area can be dynamically changed. That is, when the portrait data is biased to the left, the area of the fill light area on the left side of the LCD screen can be increased, and the fill light area on the right side can be reduced, thereby improving the fill light effect on the left side and enhancing the visibility and clarity of the face in the video.

[0026] See Figure 2 The present invention also provides an automatic light-filling system for a liquid crystal screen, comprising a processor 1 and a memory 2, wherein the memory 2 stores a program or instruction, and when the program or instruction is executed by the processor 1, the following steps are implemented: S1. When detecting that the LCD screen enters a face recognition program, dividing the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area; S2. Obtain color RGB video frame data through the RGB camera of the LCD screen, and obtain the video illumination value according to the color RGB video frame data; S3. Control the working state of the fill light area according to the video illumination value and adjust the parameter setting of the fill light area to realize automatic fill light of the LCD screen.

[0027] From the above description, it can be seen that the present invention has the following beneficial effects: The present invention provides an automatic fill light system for a liquid crystal display screen. When it is detected that the liquid crystal display screen enters a face recognition program, the system divides the display area of the liquid crystal display screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area. The system acquires color RGB video frame data through the RGB camera of the liquid crystal display screen, and obtains a video illumination value based on the color RGB video frame data. The system controls the working state of the fill light area and adjusts the parameter settings of the fill light area based on the video illumination value to achieve automatic fill light for the liquid crystal display screen. The above method combines ambient light detection with dynamic adjustment of the screen display content to achieve automatic fill light, significantly improving the visibility and clarity of faces in the video. At the same time, no fill light is required on the video source device, reducing dependence on external fill light, reducing costs and also reducing the difficulty of structural design. The system is more user-friendly and greatly improves environmental adaptability.

[0028] Furthermore, when the program or instruction is executed by the processor, the following steps are specifically implemented: Determining whether the video illumination value is less than a first preset threshold; If yes, the working state of the fill light area is controlled to be enabled; If not, determining whether the video illumination value is greater than a second preset threshold value, and if so, controlling the working state of the fill light area to be disabled; if not, controlling the working state of the fill light area to be enabled; From the above description, it can be seen that the video illumination value is used as a basis for judging whether to enable the fill light function, which facilitates automatic fill light.

[0029] The first preset threshold is smaller than the second preset threshold.

[0030] Furthermore, when the program or instruction is executed by the processor, the following steps are also implemented: When the video illumination value is lower than the first preset threshold, the fill light value of the fill light area is set to the difference between the preset maximum fill light value and the video illumination value; wherein the preset maximum fill light value is greater than the first preset threshold; When the video illumination value is not less than the first preset threshold and not greater than the second preset threshold, the fill light value of the fill light area is set to a first preset constant fill light value; wherein the first preset constant fill light value is between the first preset threshold and the second preset threshold; When the video illumination value is greater than the second preset threshold, the fill light value of the fill light area is set to a second preset constant fill light value; wherein the second preset constant fill light value is less than the first preset threshold.

[0031] It can be seen from the above description that the specific fill light value is determined by the magnitude relationship between the video illumination value and the first preset threshold value and the second preset threshold value, thereby realizing dynamic fill light adjustment.

[0032] Furthermore, when the program or instruction is executed by the processor, the following steps are implemented: The first preset threshold is 20 Lux, the second preset threshold is 50 Lux, the preset maximum fill light value is 50 Lux, the first preset constant fill light value is 30 Lux, and the second preset constant fill light value is 0 Lux.

[0033] From the above description, it can be seen that the above specific parameters are used to achieve dynamic fill light.

[0034] Furthermore, when the program or instruction is executed by the processor, the following steps are also implemented: Determine whether there is portrait data in the face recognition area of the LCD screen. If so, calculate the deviation between the center position of the portrait data and the center position of the face recognition area, and adjust the area parameter setting of the fill light area according to the deviation.

[0035] From the above description, it can be seen that through the above method, the area of the fill light area can be dynamically changed. That is, when the portrait data is biased to the left, the area of the fill light area on the left side of the LCD screen can be increased, and the fill light area on the right side can be reduced, thereby improving the fill light effect on the left side and enhancing the visibility and clarity of the face in the video.

[0036] Several preferred embodiments or application examples are listed below to help those skilled in the art better understand the technical content of the present invention and the technical contribution made by the present invention relative to the prior art: Preferred embodiment one: like Figure 1 As shown, the present invention provides a liquid crystal screen automatic light filling method, comprising the following steps: S1. When it is detected that the LCD screen enters the face recognition program, the display area of the LCD screen is divided into a face recognition area and a fill light area. The fill light area is located outside the face recognition area, specifically distributed above, to the left, and to the right of the face recognition area. The fill light area is drawn with a white background to provide a fill light effect for the face recognition area. S2. Obtain color RGB video frame data through the RGB camera of the LCD screen, and obtain the video illumination value according to the color RGB video frame data; S3. Control the working state of the fill light area according to the video illumination value and adjust the parameter setting of the fill light area to realize automatic fill light of the LCD screen.

[0037] Furthermore, step S3 is specifically as follows: Determining whether the video illumination value is less than a first preset threshold; If so, the working state of the fill light area is controlled to be enabled, and the fill light value of the fill light area is set to the difference between the preset maximum fill light value and the video illumination value; wherein, the preset maximum fill light value is greater than the first preset threshold; the preset maximum fill light value is 50 Lux.

[0038] If not, determining whether the video illumination value is greater than a second preset threshold value. If the video illumination value is greater than the second preset threshold value, controlling the working state of the fill light area to be disabled, and setting the fill light value of the fill light area to a second preset constant fill light value; wherein the second preset constant fill light value is less than the first preset threshold value. The second preset constant fill light value is 0 Lux.

[0039] If the video illuminance value is not greater than the second preset threshold, that is, the video illuminance value is not less than the first preset threshold and not greater than the second preset threshold, the working state of the fill light area is controlled to be enabled, and the fill light value of the fill light area is set to the first preset constant fill light value; wherein, the first preset constant fill light value is between the first preset threshold and the second preset threshold; the first preset constant fill light value is 30 Lux.

[0040] The first preset threshold is smaller than the second preset threshold. In this embodiment, the first preset threshold is 20 Lux, and the second preset threshold is 50 Lux.

[0041] The above-mentioned fill light value calculation formula can be summarized as the following piecewise function: ; Where x represents the video illumination value Lux; That is, the interval is 0≤x<20, which means that when the environment is dark, the fill light intensity is negatively correlated with the illumination.

[0042] Calculation: f(x)=50−x; When x=0 (extremely dark), the maximum fill light value is 50 Lux; when x=19, the fill light value is 31 Lux; when x=20 (threshold), the fill light value is 30 Lux.

[0043] That is, the interval is 20≤x<50, which means that the ambient light is sufficient to support basic recognition, and the fill light is maintained at a fixed value of 30 Lux to avoid resource waste.

[0044] That is, when the interval is x ≥ 50, it means that the ambient brightness is sufficient and the fill light is completely turned off to save energy. It should be noted that setting the fill light value to 0 Lux is equivalent to turning off the fill light.

[0045] To further improve the visibility and clarity of faces in the video, step S3 further includes: The system determines whether there is portrait data within the face recognition area of the LCD screen. If so, it calculates the deviation between the center of the portrait data and the center of the face recognition area, and adjusts the area parameter of the fill light area based on the deviation. This method dynamically changes the area of the fill light area. That is, when the portrait data deviates to the left, the fill light area on the left side of the LCD screen can be increased, while the fill light area on the right side can be reduced, thereby improving the fill light effect on the left side and enhancing the visibility and clarity of the face in the video.

[0046] In this embodiment, the deviation value is calculated by utilizing the positional relationship between the center position of the detected portrait data and the center position of the preset face recognition area. With the center position of the preset face recognition area as the reference center, i.e., the origin, a corresponding two-dimensional rectangular coordinate system is established. Simply obtaining the coordinates of the center position of the detected portrait data in this two-dimensional rectangular coordinate system is sufficient to calculate the deviation value. The relationship between the deviation value and the area of the fill light area is then used. A larger deviation value indicates a larger fill light area on the side closer to the portrait data, and vice versa.

[0047] Preferred embodiment 2: See Figure 2 The present invention also provides an automatic light-filling system for a liquid crystal screen, comprising a processor 1 and a memory 2, wherein the memory 2 stores a program or instruction, and when the program or instruction is executed by the processor 1, the following steps are implemented: S1. When detecting that the LCD screen enters a face recognition program, dividing the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area; S2. Obtain color RGB video frame data through the RGB camera of the LCD screen, and obtain the video illumination value according to the color RGB video frame data; S3. Control the working state of the fill light area according to the video illumination value and adjust the parameter setting of the fill light area to realize automatic fill light of the LCD screen.

[0048] Furthermore, when the program or instruction is executed by the processor, the following steps are specifically implemented: Determining whether the video illumination value is less than a first preset threshold; If yes, the working state of the fill light area is controlled to be enabled; If not, determining whether the video illumination value is greater than a second preset threshold value, and if so, controlling the working state of the fill light area to be disabled; if not, controlling the working state of the fill light area to be enabled; The first preset threshold is smaller than the second preset threshold.

[0049] Furthermore, when the program or instruction is executed by the processor, the following steps are also implemented: When the video illumination value is lower than the first preset threshold, the fill light value of the fill light area is set to the difference between the preset maximum fill light value and the video illumination value; wherein the preset maximum fill light value is greater than the first preset threshold; When the video illumination value is not less than the first preset threshold and not greater than the second preset threshold, the fill light value of the fill light area is set to a first preset constant fill light value; wherein the first preset constant fill light value is between the first preset threshold and the second preset threshold; When the video illumination value is greater than the second preset threshold, the fill light value of the fill light area is set to a second preset constant fill light value; wherein the second preset constant fill light value is less than the first preset threshold.

[0050] Furthermore, when the program or instruction is executed by the processor, the following steps are implemented: The first preset threshold is 20 Lux, the second preset threshold is 50 Lux, the preset maximum fill light value is 50 Lux, the first preset constant fill light value is 30 Lux, and the second preset constant fill light value is 0 Lux.

[0051] Furthermore, when the program or instruction is executed by the processor, the following steps are also implemented: Determine whether there is portrait data in the face recognition area of the LCD screen. If so, calculate the deviation between the center position of the portrait data and the center position of the face recognition area, and adjust the area parameter setting of the fill light area according to the deviation.

[0052] The present invention has been described with reference to the above embodiments and accompanying drawings. However, the above embodiments are merely exemplary embodiments of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalents falling within the spirit and scope of the claims are intended to be within the scope of the present invention.

Claims

1. A method for automatically filling light for a liquid crystal screen, characterized in that: The following steps are involved: S1. When detecting that the LCD screen enters a face recognition program, dividing the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area; S2. Obtain color RGB video frame data through the RGB camera of the LCD screen, and obtain the video illumination value according to the color RGB video frame data; S3. Control the working state of the fill light area according to the video illumination value and adjust the parameter setting of the fill light area to realize automatic fill light of the LCD screen.

2. The method for automatically filling light for a liquid crystal display according to claim 1, wherein: Step S3 is specifically as follows: Determining whether the video illumination value is less than a first preset threshold; If yes, the working state of the fill light area is controlled to be enabled; If not, determining whether the video illumination value is greater than a second preset threshold value, and if so, controlling the working state of the fill light area to be disabled; if not, controlling the working state of the fill light area to be enabled; The first preset threshold is smaller than the second preset threshold.

3. The method for automatically filling light for a liquid crystal display according to claim 2, wherein: Step S3 further includes: When the video illumination value is lower than the first preset threshold, the fill light value of the fill light area is set to the difference between the preset maximum fill light value and the video illumination value; wherein the preset maximum fill light value is greater than the first preset threshold; When the video illumination value is not less than the first preset threshold and not greater than the second preset threshold, the fill light value of the fill light area is set to a first preset constant fill light value; wherein the first preset constant fill light value is between the first preset threshold and the second preset threshold; When the video illumination value is greater than the second preset threshold, the fill light value of the fill light area is set to a second preset constant fill light value; wherein the second preset constant fill light value is less than the first preset threshold.

4. The method for automatically filling light for a liquid crystal display according to claim 3, wherein: The first preset threshold is 20 Lux, the second preset threshold is 50 Lux, the preset maximum fill light value is 50 Lux, the first preset constant fill light value is 30 Lux, and the second preset constant fill light value is 0 Lux.

5. The method for automatically filling light for a liquid crystal display according to claim 1, wherein: Step S3 further includes: Determine whether there is portrait data in the face recognition area of the LCD screen. If so, calculate the deviation between the center position of the portrait data and the center position of the face recognition area, and adjust the area parameter setting of the fill light area according to the deviation.

6. An automatic light filling system for a liquid crystal screen, characterized in that: The system comprises a processor and a memory, wherein the memory stores a program or instruction, and when the program or instruction is executed by the processor, the following steps are implemented: S1. When detecting that the LCD screen enters a face recognition program, dividing the display area of the LCD screen into a face recognition area and a fill light area, wherein the fill light area is located outside the face recognition area; S2. Obtain color RGB video frame data through the RGB camera of the LCD screen, and obtain the video illumination value according to the color RGB video frame data; S3. Control the working state of the fill light area according to the video illumination value and adjust the parameter setting of the fill light area to realize automatic fill light of the LCD screen.

7. The automatic light-filling system for a liquid crystal display according to claim 6, characterized in that: When the program or instruction is executed by the processor, the following steps are specifically implemented: Determining whether the video illumination value is less than a first preset threshold; If yes, the working state of the fill light area is controlled to be enabled; If not, determining whether the video illumination value is greater than a second preset threshold value, and if so, controlling the working state of the fill light area to be disabled; if not, controlling the working state of the fill light area to be enabled; The first preset threshold is smaller than the second preset threshold.

8. The automatic light-filling system for a liquid crystal display according to claim 7, characterized in that: When the program or instruction is executed by the processor, the following steps are further implemented: When the video illumination value is lower than the first preset threshold, the fill light value of the fill light area is set to the difference between the preset maximum fill light value and the video illumination value; wherein the preset maximum fill light value is greater than the first preset threshold; When the video illumination value is not less than the first preset threshold and not greater than the second preset threshold, the fill light value of the fill light area is set to a first preset constant fill light value; wherein the first preset constant fill light value is between the first preset threshold and the second preset threshold; When the video illumination value is greater than the second preset threshold, the fill light value of the fill light area is set to a second preset constant fill light value; wherein the second preset constant fill light value is less than the first preset threshold.

9. The automatic light-filling system for a liquid crystal display according to claim 8, characterized in that: When the program or instruction is executed by the processor, the following steps are implemented: The first preset threshold is 20 Lux, the second preset threshold is 50 Lux, the preset maximum fill light value is 50 Lux, the first preset constant fill light value is 30 Lux, and the second preset constant fill light value is 0 Lux.

10. The automatic light-filling system for a liquid crystal display according to claim 6, characterized in that: When the program or instruction is executed by the processor, the following steps are further implemented: Determine whether there is portrait data in the face recognition area of the LCD screen. If so, calculate the deviation between the center position of the portrait data and the center position of the face recognition area, and adjust the area parameter setting of the fill light area according to the deviation.

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