Brightness adjustment method, adjustment system, and display device

Abstract

The present application provides a brightness adjustment method, an adjustment system, and a display device. The brightness adjustment method is applied to a display device, wherein the display device includes a backlight module, and the adjustment method includes: dividing the backlight source of the backlight module into a plurality of light zones; obtaining the number of pixels in the pixel area corresponding to each light zone and the pixel grayscale value of each pixel; determining the brightness parameter of the light zone according to the number of pixels and the grayscale value of each pixel; and adjusting the brightness of the light zone according to the brightness parameter. Since each light zone corresponds to a brightness parameter during the brightness adjustment process, each light zone can be adjusted separately according to the severity of the halo phenomenon in different areas, and while reducing the halo phenomenon, the brightness adjustment is more targeted and has a better effect.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a brightness adjustment method, an adjustment system, and a display device. Background Art

[0002] With the rapid development of display technology, the industry has higher and higher requirements on the performance of backlight sources of display products. For display products prepared with backlight sources with local dimming function, when a local area of ​​the backlight source is lit and other areas are off, for low-contrast display products, halos around the lit area are very likely to appear, thereby reducing the display effect of the display product. Summary of the invention

[0003] The embodiments of the present application adopt the following technical solutions:

[0004] On the one hand, an embodiment of the present application provides a brightness adjustment method, which is applied to a display device, wherein the display device includes a backlight module, and the adjustment method includes:

[0005] Dividing the backlight source of the backlight module into a plurality of light zones;

[0006] Obtaining the number of pixels in the pixel area corresponding to each of the light areas and the pixel grayscale value of each pixel;

[0007] Determine the brightness parameter of the light area according to the number of pixels and the grayscale value of each pixel;

[0008] The brightness of the light area is adjusted according to the brightness parameter.

[0009] In some embodiments of the present application, adjusting the brightness of the light zone according to the brightness parameter includes:

[0010] For the light zone in the lit state, updating its brightness value; the updated brightness value is equal to the brightness parameter;

[0011] For the light zone in the off state, the off state is maintained.

[0012] In some embodiments of the present application, determining the brightness parameter of each light area according to the number of pixels and the grayscale value of each pixel includes:

[0013] According to the number of pixels and the grayscale values ​​of the pixels, an average value of the grayscale values ​​of the pixels corresponding to each of the light areas is calculated;

[0014] An average value of the grayscale values ​​of the pixels corresponding to each light area is used as a brightness parameter of the light area.

[0015] In some embodiments of the present application, the display device further includes a display panel, and the display panel is located on the light emitting side of the backlight module; after adjusting the brightness of the light area according to the brightness parameter, the method further includes:

[0016] Determining a compensation area of ​​the display panel according to each of the lamp areas in a lit state;

[0017] determining compensation parameters of the compensation zone;

[0018] The brightness of the compensation area is adjusted according to the compensation parameter.

[0019] In some embodiments of the present application, determining the compensation area according to each of the lamp areas in the lighting state includes:

[0020] Determine a display screen in the display panel corresponding to each of the light areas in a lit state;

[0021] Determining edge pixels according to picture pixels in the displayed picture;

[0022] Determining the number of pixels of the picture;

[0023] The compensation area of ​​each edge pixel is determined according to the number of the picture pixels; wherein the compensation area includes some other pixels in the pixels corresponding to the light area in the lighting state except the picture pixels.

[0024] In some embodiments of the present application, determining the compensation parameter of the compensation zone includes:

[0025] determining the number of pixels in the compensation area;

[0026] In a case where the number of pixels in the compensation area is less than the number of brightness compensation levels, the compensation parameter of the compensation area is determined to be zero grayscale.

[0027] In some embodiments of the present application, determining the compensation parameter of the compensation zone includes:

[0028] determining the number of pixels in the compensation area;

[0029] In a case where the number of pixels in the compensation area is greater than or equal to the number of the brightness compensation levels, dividing the compensation area into a plurality of compensation sub-areas; the number of the compensation sub-areas is the same as the number of the brightness compensation levels;

[0030] Among them, the pixels in the same compensation sub-area correspond to the same brightness compensation level, the compensation parameters in the same brightness compensation level are the same, and the compensation parameters in each brightness compensation level are greater than or equal to zero grayscale and less than the pixel grayscale of the edge pixel.

[0031] In some embodiments of the present application, the compensation parameter of each compensation sub-area gradually decreases along a first direction, where the first direction is a direction from the area where the picture pixels are located to the compensation area.

[0032] On the other hand, an embodiment of the present application provides a brightness adjustment system, comprising: a controller and a backlight module electrically connected;

[0033] The backlight module is configured to provide a backlight source under the control of the controller;

[0034] Wherein, the controller includes a zone dimming unit and a control unit; the control unit is electrically connected to the zone dimming unit, and the zone dimming unit is electrically connected to the backlight module;

[0035] The partition dimming unit is configured to divide the backlight source into a plurality of light zones according to the partition control signal when receiving the partition control signal sent by the control unit;

[0036] The control unit is configured to obtain and store the number of pixels and the grayscale value of each pixel in the pixel area corresponding to each light zone; determine the brightness parameter of the light zone according to the number of pixels and the grayscale value of each pixel; and send the partition control signal and the dimming signal;

[0037] The zone dimming unit is further configured to obtain the brightness parameter after receiving the dimming signal, and adjust the brightness of the light zone according to the brightness parameter.

[0038] In some embodiments of the present application, the partition dimming unit includes a partition sub-unit and a dimming sub-unit;

[0039] The partitioning subunit is configured to divide the backlight source into a plurality of light zones according to the partitioning control signal;

[0040] The dimming subunit is configured to obtain the brightness parameter, and for the light zone in the lit state, update its brightness value; the updated brightness value is equal to the brightness parameter; and for the light zone in the extinguished state, keep the extinguished state.

[0041] In some embodiments of the present application, the control unit includes a storage subunit, an acquisition subunit and an operation subunit;

[0042] The acquisition subunit is configured to acquire the number of pixels in the pixel area corresponding to each of the light areas and the pixel grayscale value of each pixel;

[0043] The storage subunit is configured to store the partition control signal, the dimming signal, the number of pixels in the pixel area corresponding to the light zone and the pixel grayscale value of each pixel, and the brightness parameter; and send out the partition control signal and the dimming signal;

[0044] The operator unit is configured to average the grayscale values ​​of the pixels corresponding to each light zone according to the number of pixels and the grayscale values ​​of the pixels, and use the average grayscale value of the pixels corresponding to each light zone as the brightness parameter of the light zone.

[0045] In some embodiments of the present application, the system further includes a display panel, the display panel is located at the light-emitting side of the backlight module, and the display panel is electrically connected to the control unit; the controller further includes a color compensation unit, and the color compensation unit is electrically connected to the control unit;

[0046] The color compensation unit is configured to determine a compensation area of ​​the display panel according to each of the lamp areas in a lit state; and determine a compensation parameter of the compensation area;

[0047] The control unit is further configured to adjust the brightness of the compensation area according to the compensation parameter.

[0048] In some embodiments of the present application, the color compensation unit includes a first determination subunit and a second determination subunit;

[0049] The first determination subunit is configured to determine the display screen in the display panel corresponding to each of the light zones in the lit state; determine the edge pixels according to the screen pixels in the display screen; determine the number of the screen pixels; determine the compensation area of ​​each of the edge pixels according to the number of the screen pixels; wherein the compensation area includes some other pixels in the pixels corresponding to the light zones in the lit state except the screen pixels;

[0050] The second determining subunit is configured to determine the number of pixels in the compensation area; when the number of pixels in the compensation area is less than the number of brightness compensation levels, the compensation parameter of the compensation area is determined to be zero grayscale; when the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, the compensation area is divided into a plurality of compensation sub-areas, and the number of the compensation sub-areas is the same as the number of the brightness compensation levels;

[0051] Among them, the pixels in the same compensation sub-area correspond to the same brightness compensation level, the compensation parameters in the same brightness compensation level are the same, and the compensation parameters in each brightness compensation level are greater than or equal to zero grayscale and less than the pixel grayscale of the edge pixel.

[0052] In some embodiments of the present application, the compensation parameter of each compensation sub-area gradually decreases along a first direction, where the first direction is a direction from the area where the picture pixels are located to the compensation area.

[0053] On the other hand, an embodiment of the present application provides a display device, comprising the adjustment system as described above.

[0054] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments or descriptions of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0056] Figure 1a and Figure 1b A schematic diagram for explaining the principle of the halo phenomenon provided in an embodiment of the present application;

[0057] Figure 2 A flow chart of a brightness adjustment method provided in an embodiment of the present application;

[0058] Figure 3a A schematic diagram of the arrangement of light zones of a backlight source provided in an embodiment of the present application;

[0059] Figure 3b for Figure 3a A schematic diagram of pixel arrangement in a pixel area corresponding to one of the light areas;

[0060] Figure 4a A schematic diagram of a light zone state of a backlight source provided in an embodiment of the present application;

[0061] Figure 4b for Figure 4a Schematic diagram of the halo phenomenon in the pixel area corresponding to the light area shown;

[0062] Figure 5a A schematic diagram of the light zone status of another backlight source provided in an embodiment of the present application;

[0063] Figure 5b for Figure 5a A schematic diagram of the halo improvement effect of the pixel area corresponding to the light area shown;

[0064] Figure 6a The backlight source provided in the embodiment of the present application is divided into 4*4 light zones;

[0065] Figure 6b for Figure 6a A schematic diagram of a pixel area corresponding to a backlight source shown;

[0066] Figure 7a A schematic diagram of the structure of a brightness adjustment system provided in an embodiment of the present application;

[0067] Figure 7b A schematic diagram of the structure of another brightness adjustment system provided in an embodiment of the present application;

[0068] Figure 8 The backlight brightness comparison curve before and after brightness adjustment provided in the embodiment of the present application. Specific embodiments

[0069] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0070] In the drawings, the thickness of regions and layers may be exaggerated for clarity. The same reference numerals in the drawings represent the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0071] In the embodiments of the present application, unless otherwise specified, "plurality" means two or more; the orientation or positional relationship indicated by the term "on" and the like is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0072] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present application. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0073] In the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with basically the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present application, and shall not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0074] In the related art, for a low-contrast display device with a local dimming function, when a local area of ​​the display screen is lit and other areas are off, a "halo" phenomenon occurs because part of the light in the lit area can leak through the off area. The halo surrounds the lit area, and the "halo" phenomenon greatly reduces the display effect of the display device. It should be noted that the local dimming function is achieved by controlling the backlight source in different areas.

[0075] For a display device with a local dimming function, the display device includes a backlight module and a display panel. If the backlight source of the backlight module is divided into five areas, the five areas can be controlled separately; when the third area (Area3) in the backlight source is lit and the other areas are off, in an ideal case, reference Figure 1a As shown in FIG. 1 , the light intensity measured at the position of the display panel corresponding to the third area (Area3) is 1, and the light intensity measured in other areas is 0; however, in actual applications, due to the light leakage of the display panel, the reference Figure 1b As shown, the light intensity at the position of the display panel corresponding to the third area (Area3) is weakened, and the positions of the display panels corresponding to other areas adjacent to the third area (Area3) show a certain brightness. When the average brightness of the display device is low, a halo phenomenon is presented with the third area (Area3) as the center and gradually spreads to the surroundings, which reduces the display effect. Figure 1a and Figure 1b The horizontal axis represents the different areas corresponding to the backlight source, and the vertical axis represents the light intensity (Intensity).

[0076] It should be noted that the situation where the average brightness of the display device is low includes the situation where a local area of ​​the display screen is white and most of the area is black. In this case, the "halo" phenomenon is more obvious.

[0077] At present, there are two methods in the related art to reduce the "halo" phenomenon: first, by improving the design of the display device and increasing the contrast of the display device, thereby reducing the light leakage in the area in the extinguished state, so as to achieve the effect of reducing the "halo" phenomenon. Second, by reducing the size of each partition in the backlight source, increasing the number of partitions of the backlight source, and controlling the backlight by partition, the brightness difference between the backlight partition corresponding to the white screen and the backlight partition corresponding to the adjacent black screen is reduced, thereby reducing the "halo" phenomenon. However, the improvement methods in the related art are technically difficult and costly.

[0078] Based on this, an embodiment of the present application provides a brightness adjustment method, which is applied to a display device, wherein the display device includes a backlight module, Figure 2 As shown, the adjustment method includes:

[0079] S901, dividing the backlight source of the backlight module into a plurality of light zones;

[0080] For example, the backlight source can be divided into 9 light zones, 16 light zones or 25 light zones. For each light zone after the division, its state can be controlled separately, for example, a light zone can be controlled separately to be in a lighting state or an extinguishing state; its brightness can also be controlled separately, for example, a light zone can be controlled separately to increase or decrease its brightness.

[0081] Figure 3a A schematic diagram showing a backlight source of a backlight module is divided into 16 light zones. Figure 3a Each square in the represents a light zone.

[0082] The type of the backlight module is not limited here. In some embodiments, the backlight module may be an LED (Light Emitting Diode) backlight module, or may be a Mini LED (Mini Light Emitting Diode) backlight module.

[0083] Exemplarily, each light zone may include at least one LED lamp; or, each light zone may include at least one Mini LED lamp.

[0084] In some embodiments, the Mini LED backlight module may be an AM Mini LED (Active Matrix Mini Light Emitting Diode) backlight module; or, the Mini LED backlight module may be a PM Mini LED (Passive Matrix Mini Light Emitting Diode) backlight module.

[0085] S902, obtaining the number of pixels in the pixel area corresponding to each light area and the pixel grayscale value of each pixel;

[0086] Figure 3b Shows Figure 3a Schematic diagram of pixel arrangement in a pixel area corresponding to one of the light zones. Exemplarily, a pixel area corresponding to a light zone includes the following: Figure 3b The pixels are arranged in a 5*5 pattern.

[0087] In practical applications, the number of pixels in the pixel area of ​​the display panel corresponding to each light area and the pixel grayscale value of each pixel are obtained through a timing controller (TCON).

[0088] S903, determining the brightness parameter of the light area according to the number of pixels and the grayscale value of each pixel;

[0089] In the backlight module, each light zone corresponds to a brightness parameter. It can be understood that the adjustment parameters of each light zone are determined by the number of pixels and the grayscale value of the pixels corresponding to each light zone.

[0090] When adjusting the brightness of the backlight, the embodiment of the present application adjusts each light zone separately according to the severity of the halo phenomenon in different areas.

[0091] Exemplarily, the brightness parameters of each light zone may be the same; or, the brightness parameters of each light zone may be different.

[0092] S904: Adjust the brightness of the light zone according to the brightness parameter.

[0093] In actual applications, the process of adjusting the brightness of each light zone is determined by the brightness parameter. Specifically, for a light zone that is initially off, after brightness adjustment, the light zone is still off; for a light zone that is initially on, the brightness of the light zone after adjustment is the brightness corresponding to the brightness parameter.

[0094] It should be noted that, although the brightness adjustment method provided in the embodiment of the present application involves obtaining the number of pixels and pixel grayscale values ​​in the pixel area corresponding to the light area during the brightness adjustment process, it ultimately still performs brightness adjustment on each light area in the backlight source. When adjusting the brightness of each light area, taking the Mini LED backlight module as an example, the brightness is specifically adjusted by adjusting the anode voltage corresponding to each Mini LED light-emitting chip.

[0095] In the adjustment method provided in the embodiment of the present application, the number of pixels and the pixel grayscale value in the pixel area corresponding to each light zone are obtained, the brightness parameter is determined according to the number of pixels and the pixel grayscale value, and the brightness of the light zone is adjusted according to the brightness parameter. Since each light zone corresponds to a brightness parameter during the brightness adjustment process, each light zone can be adjusted separately according to the severity of the halo phenomenon in different areas. While reducing the halo phenomenon, the brightness adjustment is more targeted and the brightness adjustment effect is better.

[0096] In some embodiments of the present application, step S904, adjusting the brightness of the light zone according to the brightness parameter, includes:

[0097] S9041. For the light zone in the lit state, update its brightness value; the updated brightness value is equal to the brightness parameter;

[0098] In practical applications, the brightness parameter may be a grayscale value representing the brightness of a lamp area. According to the grayscale value, the voltage value of the anode of the light emitting element in the lamp area is adjusted to update the brightness of the lamp area.

[0099] S9042. For the light zone in the off state, keep it in the off state.

[0100] Since the brightness parameter of the light zone is determined by the pixel grayscale value, for the light zone in the off state, the grayscale value of each pixel in the corresponding pixel area is zero, and the brightness parameter is also zero, so the light zone in the off state remains off.

[0101] In some embodiments of the present application, step S903, determining the brightness parameter of the light zone according to the number of pixels and the grayscale value of each pixel, includes:

[0102] S9031. Calculate the average grayscale value of each pixel corresponding to each light area according to the number of pixels and the grayscale value of each pixel;

[0103] S9032. Use the average value of the grayscale values ​​of each pixel corresponding to each light area as the brightness parameter of the light area.

[0104] In actual applications, for each light zone in the lit state (or off state), the pixel grayscale values ​​in the pixel area corresponding to each light zone are averaged, and the average value is used as the brightness parameter. By adjusting the brightness of each light zone to the brightness value corresponding to the brightness parameter, the brightness difference between the pixels in the black screen and the pixels in the white screen in the pixel area corresponding to each light zone is reduced, thereby reducing the halo display in the display screen and improving the display effect.

[0105] Below Figure 4a The backlight source including 4*4 light zones is taken as an example to explain how to improve the halo problem through the brightness adjustment method of the present application. Figure 4a Schematic diagram of each light zone of the backlight source, the portion marked with E is the light zone in the extinguished state, and the portion marked with L is the light zone in the lit state. Figure 4b for Figure 4a The pixel area corresponding to the light area shown can be seen. Figure 4b An obvious "halo" phenomenon is shown in the pixel area, which seriously reduces the display effect.

[0106] It should be noted that the "halo" phenomenon can be understood as a halo of light from bright to dark around the central area with the pixel area corresponding to the four lit light areas as the central area. Figure 4b A circle is used to illustrate this.

[0107] The pixel area corresponding to the light area refers to: in the display panel, the pixel area whose orthographic projection on the backlight module falls within the light area.

[0108] The brightness adjustment method of this application is specifically described as follows:

[0109] The backlight source of the backlight module is divided into Figure 4a Multiple light zones shown in .

[0110] Get the corresponding Figure 4b The number of pixels in each pixel area shown and the pixel grayscale value of each pixel; Figure 4b The number of pixels in each pixel area shown is 25, and the grayscale value of each pixel is A1, A2, A3, A4, ... A25.

[0111] According to the number of pixels and the grayscale value of each pixel, the grayscale value of each pixel corresponding to each light area is averaged;

[0112] The average value of the grayscale values ​​of each pixel corresponding to each light area is taken as the brightness parameter of the light area; then the brightness parameter = (A1+A2+A3+A4+…+A25) / 25.

[0113] For the light zone in the on state, update its brightness value; the updated brightness value is equal to the brightness parameter; for the light zone in the off state, keep the off state. Figure 4a The brightness of each light zone in the lighting state is adjusted to obtain the following Figure 5a The schematic diagram of the backlight source is shown in FIG. Figure 5b for Figure 5a The pixel area corresponding to the light area is based on Figure 5b It can be seen that after the brightness of the light area is adjusted, the halo problem in the corresponding pixel area is significantly alleviated.

[0114] In some embodiments, if the backlight source is divided into 1152 light zones, the number of pixels corresponding to one light zone is 3556, and the pixel grayscale values ​​of each pixel in the light zone are A1, A2, A3, A4, ... A3556 respectively; then the brightness parameter of the light zone = (A1+A2+A3+A4+...+A3556) / 3556, and then the brightness of each light zone is adjusted according to the brightness parameter corresponding to it.

[0115] For example, if a light zone in the backlight source is lit and the initial brightness (Initial) is 100%, the number of pixels in the pixel area corresponding to the light zone is 3556, and 200 pixels display a white screen. According to the above-mentioned brightness adjustment method, the brightness parameter of the light zone (Renew) = (100%*200+0+…+0) / 3556 = 5.6%; according to the brightness adjustment method, the brightness of the light zone in the lit state is adjusted from the original 100% to 5.6%. Figure 8 The initial brightness of the lamp area and the brightness curve after adjustment using the brightness adjustment method of the present application are illustrated, wherein the abscissa of the curve is wavelength and the ordinate is brightness.

[0116] In some embodiments of the present application, the display device further includes a display panel, and the display panel is located on the light emitting side of the backlight module;

[0117] After adjusting the brightness of the light zone according to the brightness parameter in step S904, the method further includes:

[0118] S905, determining a compensation area of ​​the display panel according to each lamp area in a lit state;

[0119] The compensation area of ​​the display panel refers to: determining the edge pixels of the screen pixels based on the display screen corresponding to each light area in the lit state, and then determining some pixels other than the screen pixels corresponding to each light area in the lit state based on the edge pixels.

[0120] It should be noted that a screen pixel refers to a pixel that is being used to display a screen, that is, when a local area of ​​the display panel displays a screen and the remaining area is in a black state, the pixel located in the area that is displaying the screen can be called a screen pixel. Figure 7a The backlight source is divided into 4*4 light zones. Figure 7b for Figure 7a The pixel area corresponding to the backlight source shown in the figure includes 25 pixels in the pixel area corresponding to each light area. Figure 7b The area marked PP in the figure is the area where the picture is displayed, and the pixels in this area are called picture pixels.

[0121] The picture pixels include edge pixels, where the edge pixels are pixels located at the edge of the white area (the area where the picture is displayed) at the black-white boundary; the black-white boundary refers to the boundary between the area where the picture is displayed and the black area. Figure 7b As shown, the pixels marked with “△, and ▲" pixels are edge pixels.

[0122] It can be understood that the compensation area is the area where some other pixels except the picture pixels are located in the pixel area corresponding to the light area in the lit state. The orthographic projection of the area where the above other pixels are located on the backlight module is located in the light area in the lit state, and its orthographic projection on the backlight module does not overlap with the orthographic projection of the picture pixels on the backlight module. In addition, the pixel area corresponding to the light area refers to: in the display panel, the pixel area whose orthographic projection on the backlight module falls into the light area. S906, determine the compensation parameters of the compensation area;

[0123] A compensation area corresponding to an edge pixel includes at least one compensation parameter. Before determining the compensation parameter, the compensation area is divided into at least one compensation sub-area, and each compensation sub-area corresponds to a compensation parameter; the compensation parameters of each compensation sub-area are different, and the compensation parameters of each compensation sub-area gradually decrease along a first direction, and the first direction is the direction from the area where the picture pixel is located to the compensation area.

[0124] In the case that the compensation region includes only one compensation sub-region, the compensation parameter of the compensation sub-region is zero grayscale.

[0125] When the compensation area includes multiple compensation sub-areas, one compensation sub-area corresponds to a brightness compensation level, one brightness compensation level corresponds to a pixel grayscale value, and the pixel grayscale values ​​corresponding to each brightness compensation level are greater than or equal to zero grayscale and less than the grayscale value of the edge pixel corresponding to the compensation area.

[0126] The edge pixel refers to the pixel at the edge of the white area at the black-white boundary; the black-white boundary refers to the boundary between the display area and the black area. Figure 6bAs shown, the area marked with PP is the area where the picture is displayed, and the area includes a plurality of picture pixels, and the picture pixels are marked with “△, and ▲” are edge pixels.

[0127] S907: Adjust the brightness of the compensation area according to the compensation parameters.

[0128] The brightness adjustment method provided in the embodiment of the present application can also determine a compensation area according to the light area in the lit state, and the compensation area is the area where some other pixels except the screen pixels are located in the pixel area corresponding to the light area in the lit state; by adjusting the brightness of the pixels in the compensation area to different degrees, the halo phenomenon can be further alleviated, the display effect of the display device can be improved, and the picture quality can be improved.

[0129] In some embodiments of the present application, step S905, determining the compensation area according to each lamp area in the lighting state, includes:

[0130] S9051, determining the display screen in the display panel corresponding to each light zone in the lighting state;

[0131] For example, Figure 6a The backlight source is divided into 4*4 light zones. Figure 6b for Figure 6a The pixel area corresponding to the backlight source shown in the figure includes 25 pixels in the pixel area corresponding to each light area. Figure 6b The area marked PP in the figure is the area where the picture is displayed, and the pixels in this area are called picture pixels.

[0132] S9052, determining edge pixels according to picture pixels in the displayed picture;

[0133] The edge pixel is a pixel located at the edge of the white area at the black-white boundary; the black-white boundary refers to the boundary between the display area and the black area. Figure 6b As shown, the pixels marked with “△, and ▲" pixels are edge pixels.

[0134] S9053, determining the number of picture pixels;

[0135] The specific method for determining the number of pixels in the picture is not limited here.

[0136] S9054. Determine a compensation area for each edge pixel according to the number of picture pixels; wherein the compensation area is an area where some other pixels except picture pixels among the pixels corresponding to the light area in the lit state are located.

[0137] It can be understood that the orthographic projection of the compensation area on the backlight module is located in the light area in the lighting state, and the orthographic projection of the compensation area on the backlight module does not overlap with the orthographic projection of the picture pixels on the backlight module.

[0138] refer to Figure 6b As shown, since the display image is located in the pixel areas corresponding to light area 6, light area 7, light area 10 and light area 11, each compensation area is also located in the corresponding pixel areas in light area 6, light area 7, light area 10 and light area 11, and the pixels in the compensation area do not include image pixels.

[0139] It should be noted that each edge pixel corresponds to a compensation area, and the compensation areas corresponding to all edge pixels in the picture pixels together constitute a buffer area, and the pixels in the buffer area are arranged around the picture pixels.

[0140] In addition, when determining the compensation area, a dynamic parameter X is also involved. The number of pixels included in each compensation area can be determined based on the number of pixels in the picture and the dynamic parameter X.

[0141] In some embodiments, the dynamic parameter X is related to the contrast of display devices of different models. In practical applications, the higher the contrast, the smaller the dynamic parameter X may be.

[0142] In some embodiments, the dynamic parameter X is related to the area of ​​the outer expansion region of the halo. The larger the area of ​​the outer expansion region of the halo, the larger the dynamic parameter X can be. Figure 5b For example, the area of ​​the outer expansion region of the halo is the area of ​​the elliptical halo minus the area of ​​the pixel areas corresponding to the four light areas in the lit state. The outer expansion region of the halo is actually a ring-like area.

[0143] It should be noted that, in practical applications, when the brightness of the compensation area is adjusted, what is actually changed is the pixel electrode voltage of each pixel in the compensation area.

[0144] The following is a specific example to illustrate how to determine the compensation area:

[0145] If the number of picture pixels is 200 and the dynamic parameter X is set to 20%, the number of pixels included in the compensation area corresponding to each edge pixel=200*20%=40.

[0146] refer to Figure 6b As shown, the picture pixels ( Figure 6b The number of pixels in the area marked PP in the figure is 16. When the dynamic parameter X is set to 12.5%, the number of pixels included in the compensation area corresponding to each edge pixel = 16*12.5% ​​= 2. Figure 6bThe compensation area of ​​the edge pixel marked with “▲” is marked as B. When the number of brightness compensation energy levels is 5 or 6, since the number of pixels in compensation area B is less than the number of brightness compensation energy levels, the two pixels in compensation area B can be directly black-inserted.

[0147] When the dynamic parameter X is set to 18.75%, the number of pixels included in the compensation area corresponding to each edge pixel = 16*18.75% = 3. Figure 6b Medium Mark The edge pixels of the compensation area are marked as C. When the number of brightness compensation energy levels is 5 or 6, since the number of pixels in compensation area C is less than the number of brightness compensation energy levels, the two pixels in compensation area C can be directly black-inserted.

[0148] The black insertion process can be understood as adjusting the grayscale of the pixel to the L0 grayscale.

[0149] The compensation areas of other edge pixels are determined in a similar manner to this edge pixel. The compensation areas corresponding to all edge pixels together constitute a buffer zone, and the pixels in the buffer zone are arranged around the picture pixels.

[0150] It should be noted that, in the embodiments of the present application, the arrangement of pixels in the compensation area or the arrangement of pixels in the compensation sub-area is not further limited and is determined based on actual conditions.

[0151] In some embodiments of the present application, step S906, determining the compensation parameters of the compensation area, includes:

[0152] S9061, determining the number of pixels in the compensation area;

[0153] S9062: When the number of pixels in the compensation area is less than the number of brightness compensation levels, the compensation parameter of the compensation area is determined to be zero grayscale.

[0154] Exemplarily, if the number of pixels in the compensation area is 5 and the number of brightness compensation levels is 6, the compensation parameters of each pixel in the compensation area are set to zero grayscale (L0); if the number of pixels in the compensation area is 4 and the number of brightness compensation levels is 5, the compensation parameters of each pixel in the compensation area are set to zero grayscale (L0).

[0155] When performing brightness compensation or brightness adjustment, the brightness adjustment process is divided into a plurality of brightness compensation levels according to different brightness adjustment amplitudes; different brightness compensation levels have different degrees of brightness adjustment.

[0156] The more the number of brightness compensation energy levels, the more delicate the brightness adjustment process of each pixel in the compensation area is, and the better the display image quality after brightness adjustment is. In practical applications, the number of brightness compensation energy levels is related to the number of pixels included in the compensation area, and can be adjusted according to actual conditions, which is not limited here.

[0157] In addition, the number of brightness compensation levels is related to the processing accuracy of the image quality engine.

[0158] For example, for a display device using SDR (Standard Dynamic Range) technology, the image quality engine has a processing accuracy of 8 bits, and the grayscale of the image includes 2 8 =256 levels, namely including L0, L1, L2, L3...L254 and L255, the number of brightness compensation energy levels can include up to 256.

[0159] For display devices using HDR (High-Dynamic Range) technology, the image quality engine has a processing accuracy of 10 bits, and the grayscale of the image includes 2 10 =1024 levels, namely including L0, L1, L2, L3...L1022 and L1023, the number of brightness compensation energy levels can include up to 1024.

[0160] It should be noted that HDR (High-Dynamic Range) technology is relative to SDR (Standard Dynamic Range) technology. For SDR technology display devices, the brightness range of the display device is 200-300nits, the contrast ratio is about 500:1 to 4000:1 due to different display modes, and the internal image quality engine processing accuracy is 8bits. However, for HDR1000 technology display devices (HDR1000 technology is a type of HDR technology), the brightness requirements of the display device are: the brightness of the 10% central white screen requires ≥1000nits, and the brightness of the corner black state is ≤0.05nits; the internal image quality engine processing accuracy is 10bits.

[0161] In some embodiments of the present application, step S906, determining the compensation parameters of the compensation area, includes:

[0162] Step S9063, determining the number of pixels in the compensation area;

[0163] Step S9064: when the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, the compensation area is divided into a plurality of compensation sub-areas; the number of compensation sub-areas is the same as the number of brightness compensation levels;

[0164] Among them, pixels in the same compensation sub-area correspond to the same brightness compensation level, the compensation parameters in the same brightness compensation level are the same, and the compensation parameters in each brightness compensation level are greater than or equal to zero grayscale and less than the pixel grayscale of the edge pixel.

[0165] In some embodiments of the present application, the compensation parameter of each compensation sub-area gradually decreases along a first direction, where the first direction is a direction from an area where the picture pixels are located to the compensation area.

[0166] Exemplarily, the compensation area may be divided into 3, 4, 5, 6 or more compensation sub-areas, and the number of compensation sub-areas is the same as the number of brightness compensation levels.

[0167] It can be understood that the more the number of compensation sub-areas into which each compensation area is divided, the more delicate the brightness adjustment process is, and the better the image quality of the picture displayed in the pixel area after the brightness adjustment is performed.

[0168] For example, for a display device using HDR technology, since its internal image quality engine has a processing accuracy of 10 bits, the grayscale of its picture includes 210=1024 levels, including L0, L1, L2, L3...L1022 and L1023 grayscales, and the number of brightness compensation levels can include up to 1024. Table 1 provides a compensation parameter table with 6 brightness compensation levels.

[0169] Table 1: Compensation parameters for the first level of brightness compensation

[0170]

[0171] When the number of pixels in the compensation area corresponding to an edge pixel is 27, since the number of brightness compensation levels is 6, the compensation area is divided into 6 compensation sub-areas, 27÷6=4 (remainder 3), then:

[0172] The first compensation sub-area includes 4 pixels, the corresponding brightness compensation energy level is 5, and the corresponding compensation parameter is L900;

[0173] The second compensation sub-area includes 4 pixels, the corresponding brightness compensation level is 4, and the corresponding compensation parameter is L700;

[0174] The third compensation sub-area includes 4 pixels, the corresponding brightness compensation energy level is 3, and the corresponding compensation parameter is L500;

[0175] The fourth compensation sub-area includes 4 pixels, the corresponding brightness compensation level is 2, and the corresponding compensation parameter is L300;

[0176] The fifth compensation sub-area includes 4 pixels, the corresponding brightness compensation energy level is 1, and the corresponding compensation parameter is L100;

[0177] The sixth compensation sub-area includes 4+3 (remainder) pixels, the corresponding brightness compensation level is 0, and the corresponding compensation parameter is L0.

[0178] It should be noted that the grayscale corresponding to the lowest brightness compensation energy level (Rank 0) is the L0 grayscale, the grayscale corresponding to the highest brightness compensation energy level (Rank 5) is smaller than the pixel grayscale of the edge pixel, and the grayscales corresponding to other brightness compensation energy levels are between these two grayscales and can be adjusted according to actual conditions.

[0179] For example, for a display device using SDR technology, since its internal image quality engine has a processing accuracy of 8 bits, the grayscale of its picture includes 28=256 levels, including L0, L1, L2, L3...L254 and L255 grayscales. The number of brightness compensation levels can be up to 256. Table 2 provides a compensation parameter table with 5 brightness compensation levels.

[0180] Table 2: Compensation parameters in the second brightness compensation level

[0181]

[0182] When the number of pixels in the compensation area corresponding to an edge pixel is 27, the compensation area is divided into 5 compensation sub-areas, 27÷5=5 (remainder 2), then:

[0183] The first compensation sub-area includes 5 pixels, the corresponding brightness compensation level is 4, and the corresponding compensation parameter is L200;

[0184] The second compensation sub-area includes 3 pixels, the corresponding brightness compensation level is 3, and the corresponding compensation parameter is L150;

[0185] The third compensation sub-area includes 5 pixels, the corresponding brightness compensation level is 2, and the corresponding compensation parameter is L100;

[0186] The fourth compensation sub-area includes 5 pixels, the corresponding brightness compensation energy level is 1, and the corresponding compensation parameter is L50;

[0187] The fifth compensation sub-area includes 5+2 (remainder) pixels, the corresponding brightness compensation level is 0, and the corresponding compensation parameter is L0.

[0188] It should be noted that the grayscale corresponding to the lowest brightness compensation energy level (Rank 0) is the L0 grayscale, the grayscale corresponding to the highest brightness compensation energy level (Rank 4) is smaller than the pixel grayscale of the edge pixel, and the grayscales corresponding to other brightness compensation energy levels are between these two grayscales and can be adjusted according to actual conditions.

[0189] In addition, it should be emphasized that, when the number of pixels in the compensation area is less than the number of brightness compensation levels, the compensation parameter of the compensation area is determined to be zero grayscale, that is, at this time, all pixels in the compensation area are blacked out. When the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, all pixels in the compensation sub-areas corresponding to the brightness compensation level of 0 are blacked out (L0 grayscale), and as the brightness compensation level gradually decreases (grayscale value decreases), the corresponding compensation sub-area is farther away from the area where the picture pixels are located; for all pixels in the compensation sub-area with the largest brightness compensation level, the grayscale value corresponding to its compensation parameter is less than the grayscale value of the edge pixel.

[0190] In practical applications, since HDR display devices have higher requirements for brightness and image quality, when adjusting the brightness of the backlight source in an HDR display device, each compensation area can be divided into a larger number of compensation sub-areas, so that the brightness of each compensation sub-area can be adjusted separately to meet the higher image quality requirements of the HDR display device.

[0191] Exemplary, reference Figure 6b As shown in FIG. 1 , when the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, the brightness compensation levels corresponding to each compensation sub-area are Figure 6b The direction of the arrow shown gradually decreases (grayscale value decreases).

[0192] In actual applications, the compensation area corresponding to each edge pixel includes at least one compensation sub-area, each compensation sub-area includes at least one pixel, and the specific arrangement of the pixels in each compensation sub-area can be determined based on the number of pixels included in the actual compensation area and the severity of the halo, which is not limited here.

[0193] The brightness adjustment method provided in the embodiment of the present application can determine the compensation area according to the lamp area in the lighting state. When the number of pixels in the compensation area is less than the number of brightness compensation energy levels, all pixels in the compensation area are directly blacked out. When the number of pixels in the compensation area is greater than or equal to the number of brightness compensation energy levels, the compensation area is divided into multiple compensation sub-areas, and the brightness of the pixels in each compensation sub-area is adjusted to different degrees, thereby further reducing the halo phenomenon, improving the display effect of the display device, and improving the picture quality.

[0194] The embodiment of the present application provides a brightness adjustment system, referring to Figure 7a As shown, it includes: a controller 400 and a backlight module 500 which are electrically connected;

[0195] The backlight module 400 is configured to provide a backlight source under the control of the controller 500;

[0196] The controller 400 includes a zone dimming unit 402 and a control unit 401; the control unit 401 is electrically connected to the zone dimming unit 402, and the zone dimming unit 402 is electrically connected to the backlight module 500;

[0197] The partition dimming unit 402 is configured to divide the backlight source into a plurality of light zones according to the partition control signal when receiving the partition control signal sent by the control unit 401;

[0198] The control unit 401 is configured to obtain and store the number of pixels and the grayscale value of each pixel in the pixel area corresponding to each light zone; determine the brightness parameter of the light zone according to the number of pixels and the grayscale value of each pixel; and send a partition control signal and a dimming signal;

[0199] The zone dimming unit 402 is further configured to obtain a brightness parameter after receiving the dimming signal, and adjust the brightness of the light zone according to the brightness parameter.

[0200] In the embodiment of the present application, the controller 400 may be a timing controller (TCON), the local dimming unit 402 may be a local dimming controller (LDC), and the control unit 401 may be a multi-point control device (MCU, Microcontroller Unit).

[0201] In the embodiments of the present application, the above-mentioned backlight module may be a Mini LED type backlight module, or may be a Micro LED type backlight module, which is determined according to actual conditions and is not limited here.

[0202] In an embodiment of the present application, the system also includes a PC motherboard or a video capture card (Graphics Cards) 700. The PC motherboard or the video capture card 700 can be connected to the controller 400 through an EDP interface to transmit the video stream signal to the controller 400. The video stream signal is logically operated by various modules in the controller 400, and the obtained brightness signal is transmitted to the backlight module 500 through an SPI interface, thereby controlling the brightness of the backlight source of the backlight module. In actual applications, the controller 400 is electrically connected to the backlight module 500 through an LED driver.

[0203] It should be noted that the EDP interface is a fully digital interface based on the DisplayPort architecture and protocol. It can transmit high-resolution signals with simpler connectors and fewer pins, and can achieve simultaneous transmission of multiple data. SPI (Serial Peripheral Interface) is a synchronous serial peripheral interface that enables MCU to communicate with various peripheral devices in serial mode to exchange information.

[0204] In an embodiment of the present application, the above-mentioned adjustment system can be used to obtain the number of pixels and the pixel grayscale value in the pixel area corresponding to each light zone, determine the brightness parameter according to the number of pixels and the pixel grayscale value, and adjust the brightness of the light zone according to the brightness parameter. Since each light zone corresponds to a brightness parameter during the brightness adjustment process, each light zone can be adjusted separately according to the severity of the halo phenomenon in different areas. While reducing the halo phenomenon, the brightness adjustment is more targeted and the brightness adjustment effect is better.

[0205] In some embodiments of the present application, the zone dimming unit 402 includes a zone sub-unit and a dimming sub-unit;

[0206] The partition subunit is configured to divide the backlight source into a plurality of light zones according to a partition control signal;

[0207] The dimming subunit is configured to obtain a brightness parameter, and for a light zone in a lit state, update its brightness value; the updated brightness value is equal to the brightness parameter; and for a light zone in an off state, keep the off state.

[0208] In some embodiments of the present application, the control unit 401 includes a storage subunit, an acquisition subunit, and an operation subunit;

[0209] The acquisition subunit is configured to acquire the number of pixels in the pixel area corresponding to each light area and the pixel grayscale value of each pixel;

[0210] The storage subunit is configured to store a partition control signal, a dimming signal, the number of pixels in the pixel area corresponding to the light zone, the pixel grayscale value of each pixel, and brightness parameters; and send out a partition control signal and a dimming signal;

[0211] The operation subunit is configured to average the multiple pixel grayscale values ​​corresponding to each light zone according to the number of pixels and the multiple pixel grayscale values, and use the average value of the multiple pixel grayscale values ​​corresponding to each light zone as the brightness parameter of each light zone.

[0212] In some embodiments of the present application, reference Figure 7bAs shown, the system further includes a display panel 600, which is located at the light-emitting side of the backlight module 500, and is electrically connected to the control unit 401; the controller 400 further includes a color compensation unit 403, which is electrically connected to the control unit 401;

[0213] The color compensation unit 403 is configured to determine the compensation area of ​​the display panel according to each lamp area in the lighting state; determine the compensation parameters of the compensation area;

[0214] The control unit 401 is further configured to adjust the brightness of the compensation area according to the compensation parameter.

[0215] The color compensation unit 403 may be a color compensator (ACC, Accurate Color Capture), also known as a chromaticity adjuster (ACC, Adjust Chromaticity Coordinate).

[0216] In practical applications, the color compensation unit 403 can also be used to adjust the brightness of each sub-pixel included in the pixel in the pixel area. Specifically, when a pixel includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, the overall picture color of the display panel can be adjusted by adjusting the brightness ratio of the red sub-pixel, the green sub-pixel and the blue sub-pixel.

[0217] In the embodiment of the present application, after performing logic operations related to brightness adjustment on the video stream signal through various modules in the controller 400, the obtained brightness adjustment signal is transmitted to the backlight module 500 through the SPI interface. Specifically, the PC motherboard or the video capture card 700 and the controller 400 can be connected through the EDP interface to transmit the video stream signal to the controller 400, perform logic operations on the video stream signal through various modules in the controller 400, and transmit the brightness adjustment signal obtained by the operation to the display panel 600 through the SPI interface, so as to control the grayscale value of each pixel in the compensation area of ​​the display panel. In actual applications, the video stream signal can be logically operated by various modules in the controller 400 and the corresponding signals can be transmitted to the backlight module 500 and the display panel 600 through the SPI interface respectively, so as to adjust the brightness of the backlight source and the grayscale value of each pixel in the compensation area of ​​the display panel, so as to reduce the halo phenomenon and improve the display effect of the display device under their joint action.

[0218] In some embodiments of the present application, the color compensation unit 403 includes a first determination subunit and a second determination subunit;

[0219] The first determination subunit is configured to determine the display screen in the display panel corresponding to each light zone in the lit state; determine the edge pixels according to the screen pixels in the display screen; determine the number of screen pixels; determine the compensation area of ​​each edge pixel according to the number of screen pixels; wherein the compensation area is the area where some other pixels except the screen pixels in the pixels corresponding to the light zone in the lit state are located;

[0220] The second determining subunit is configured to determine the number of pixels in the compensation area; when the number of pixels in the compensation area is less than the number of brightness compensation levels, the compensation parameter of the compensation area is determined to be zero grayscale; when the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, the compensation area is divided into a plurality of compensation sub-areas, and the number of the compensation sub-areas is the same as the number of brightness compensation levels;

[0221] Among them, pixels in the same compensation sub-area correspond to the same brightness compensation level, the compensation parameters in the same brightness compensation level are the same, and the compensation parameters in each brightness compensation level are greater than or equal to zero grayscale and less than the pixel grayscale of the edge pixel.

[0222] In some embodiments of the present application, the compensation parameter of each compensation sub-area gradually decreases along a first direction, where the first direction is a direction from an area where the picture pixels are located to the compensation area.

[0223] It should be noted that the process of brightness adjustment by the adjustment system can refer to the embodiment of the brightness adjustment method, and the repeated parts will not be repeated.

[0224] An embodiment of the present application provides a display device, comprising the adjustment system as described above.

[0225] The display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device are well understood by those skilled in the art, and are not described in detail herein, nor should they be used as limitations on the present invention. The process of adjusting the brightness of the display device may refer to the above-mentioned specific description of the adjustment system or to the embodiment of the brightness adjustment method, and the repeated parts will not be described in detail.

[0226] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A brightness adjustment method, wherein: Applied to a display device, the display device includes a backlight module, and the adjustment method includes: Dividing the backlight source of the backlight module into a plurality of light zones; Obtaining the number of pixels in the pixel area corresponding to each of the light areas and the pixel grayscale value of each pixel; Determine the brightness parameter of the light area according to the number of pixels and the grayscale value of each pixel; According to the brightness parameter, the brightness of the light area is adjusted; The display device further includes a display panel, and the display panel is located at the light-emitting side of the backlight module; after adjusting the brightness of the light area according to the brightness parameter, the method further includes: Determining a compensation area of ​​the display panel according to each of the lamp areas in a lit state; determining compensation parameters of the compensation zone; Adjusting the brightness of the compensation area according to the compensation parameter; Determining the compensation area according to each of the lamp areas in the lighting state comprises: Determine a display screen in the display panel corresponding to each of the light areas in a lit state; Determining edge pixels according to picture pixels in the displayed picture; Determining the number of pixels of the picture; Determine the compensation area of ​​each edge pixel according to the number of the picture pixels; wherein the compensation area is the area where some other pixels except the picture pixels are located in the pixels corresponding to the light area in the lit state; Determining the compensation parameters of the compensation area includes: determining the number of pixels in the compensation area; When the number of pixels in the compensation area is less than the number of brightness compensation levels, the compensation parameter of the compensation area is determined to be zero grayscale; when the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, the compensation area is divided into a plurality of compensation sub-areas; the number of the compensation sub-areas is the same as the number of the brightness compensation levels; Among them, the pixels in the same compensation sub-area correspond to the same brightness compensation level, the compensation parameters in the same brightness compensation level are the same, and the compensation parameters in each brightness compensation level are greater than or equal to zero grayscale and less than the pixel grayscale of the edge pixel.

2. The adjustment method according to claim 1, wherein: The adjusting the brightness of the light zone according to the brightness parameter comprises: For the light zone in the lit state, updating its brightness value; the updated brightness value is equal to the brightness parameter; For the light zone in the off state, the off state is maintained.

3. The adjustment method according to claim 1, wherein: Determining the brightness parameter of each light area according to the number of pixels and the grayscale value of each pixel includes: According to the number of pixels and the grayscale values ​​of the pixels, an average value of the grayscale values ​​of the pixels corresponding to each of the light areas is calculated; An average value of the grayscale values ​​of the pixels corresponding to each light area is used as a brightness parameter of the light area.

4. The adjustment method according to claim 1, wherein: The compensation parameters of each compensation sub-area gradually decrease along a first direction, where the first direction is a direction from the area where the picture pixels are located to the compensation area.

5. A brightness adjustment system, wherein: include: Electrically connected controller and backlight module; The backlight module is configured to provide a backlight source under the control of the controller; Wherein, the controller includes a zone dimming unit and a control unit; the control unit is electrically connected to the zone dimming unit, and the zone dimming unit is electrically connected to the backlight module; The partition dimming unit is configured to divide the backlight source into a plurality of light zones according to the partition control signal when receiving the partition control signal sent by the control unit; The control unit is configured to obtain and store the number of pixels in the pixel area corresponding to each of the light zones and the pixel grayscale value of each pixel; determine the brightness parameter of the light zone according to the number of pixels and the pixel grayscale value of each pixel; and send the partition control signal and the dimming signal; The zone dimming unit is further configured to obtain the brightness parameter after receiving the dimming signal, and adjust the brightness of the light zone according to the brightness parameter; The system further includes a display panel, which is located at the light-emitting side of the backlight module, and the display panel is electrically connected to the control unit; the controller further includes a color compensation unit, and the color compensation unit is electrically connected to the control unit; The color compensation unit is configured to determine a compensation area of ​​the display panel according to each of the lamp areas in a lit state; and determine a compensation parameter of the compensation area; The control unit is further configured to adjust the brightness of the compensation area according to the compensation parameter; The color compensation unit includes a first determining subunit and a second determining subunit; The first determination subunit is configured to determine the display screen in the display panel corresponding to each of the light zones in the lit state; determine the edge pixels according to the screen pixels in the display screen; determine the number of the screen pixels; determine the compensation area of ​​each of the edge pixels according to the number of the screen pixels; wherein the compensation area is the area where some other pixels except the screen pixels in the pixels corresponding to the light zones in the lit state are located; The second determining subunit is configured to determine the number of pixels in the compensation area; when the number of pixels in the compensation area is less than the number of brightness compensation levels, the compensation parameter of the compensation area is determined to be zero grayscale; when the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, the compensation area is divided into a plurality of compensation sub-areas, and the number of the compensation sub-areas is the same as the number of the brightness compensation levels; Among them, the pixels in the same compensation sub-area correspond to the same brightness compensation level, the compensation parameters in the same brightness compensation level are the same, and the compensation parameters in each brightness compensation level are greater than or equal to zero grayscale and less than the pixel grayscale of the edge pixel.

6. The system according to claim 5, wherein: The partition dimming unit includes a partition sub-unit and a dimming sub-unit; The partitioning subunit is configured to divide the backlight source into a plurality of light zones according to the partitioning control signal; The dimming subunit is configured to obtain the brightness parameter, and update the brightness value of the light zone in the lighting state; The updated brightness value is equal to the brightness parameter; for the light zone in the off state, the off state is maintained.

7. The system according to claim 5, wherein: The control unit includes a storage subunit, an acquisition subunit and an operation subunit; The acquisition subunit is configured to acquire the number of pixels in the pixel area corresponding to each of the light areas and the pixel grayscale value of each pixel; The storage subunit is configured to store the partition control signal, the dimming signal, the number of pixels in the pixel area corresponding to the light zone and the pixel grayscale value of each pixel, and the brightness parameter; and send out the partition control signal and the dimming signal; The operator unit is configured to average the grayscale values ​​of the pixels corresponding to each light zone according to the number of pixels and the grayscale values ​​of the pixels, and use the average grayscale value of the pixels corresponding to each light zone as the brightness parameter of the light zone.

8. The system according to claim 5, wherein: The compensation parameters of each compensation sub-area gradually decrease along a first direction, where the first direction is a direction from the area where the picture pixels are located to the compensation area.

9. A display device, wherein: Comprising a regulation system as described in any one of claims 5-8.

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