WO2023050190A1 - 亮度调节方法、调节系统、显示装置 - Google Patents

亮度调节方法、调节系统、显示装置 Download PDF

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Publication number
WO2023050190A1
WO2023050190A1 PCT/CN2021/121815 CN2021121815W WO2023050190A1 WO 2023050190 A1 WO2023050190 A1 WO 2023050190A1 CN 2021121815 W CN2021121815 W CN 2021121815W WO 2023050190 A1 WO2023050190 A1 WO 2023050190A1
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WIPO (PCT)
Prior art keywords
compensation
area
brightness
pixels
pixel
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PCT/CN2021/121815
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English (en)
French (fr)
Inventor
沙金
孙昊
徐波
胡美龙
张智
罗文诚
陈强
陈洋
Original Assignee
京东方科技集团股份有限公司
重庆京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 重庆京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to CN202180002808.1A priority Critical patent/CN116194984A/zh
Priority to US17/795,588 priority patent/US20240185806A1/en
Priority to PCT/CN2021/121815 priority patent/WO2023050190A1/zh
Publication of WO2023050190A1 publication Critical patent/WO2023050190A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

Definitions

  • the present application relates to the field of display technology, in particular to a brightness adjustment method, an adjustment system, and a display device.
  • the embodiments of the present application provide a brightness adjustment method, which is applied to a display device, the display device includes a backlight module, and the adjustment method includes:
  • the brightness of the lamp area is adjusted according to the brightness parameter.
  • the adjusting the brightness of the lamp area according to the brightness parameter includes:
  • the updated brightness value is equal to the brightness parameter
  • the determining the brightness parameters of each of the lamp areas according to the number of pixels and the gray scale value of each pixel includes:
  • the average value of the gray scale values of the pixels corresponding to each of the lamp regions is used as the brightness parameter of the lamp region.
  • 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 lamp area according to the brightness parameter, , the method also includes:
  • the brightness of the compensation area is adjusted according to the compensation parameter.
  • the determining the compensation area according to each of the lamp areas in the lighting state includes:
  • the compensation area for each of the edge pixels according to the number of pixels in the picture; wherein, the compensation area includes some other pixels in the pixels corresponding to the light area in the lighting state except the picture pixels .
  • the determining the compensation parameters of the compensation area includes:
  • the compensation parameter of the compensation area is determined to be zero grayscale.
  • the determining the compensation parameters of the compensation area includes:
  • the compensation area When the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, divide the compensation area into a plurality of compensation sub-areas; the number of compensation sub-areas and the number of brightness compensation levels same;
  • 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
  • the compensation parameters in each brightness compensation level are greater than or The pixel grayscale equal to zero grayscale and smaller than the edge pixel.
  • the compensation parameter of each compensation sub-area gradually decreases along a first direction, and the first direction is a direction in which the area where the picture pixel is located points to the compensation area.
  • an embodiment of the present application provides a brightness adjustment system, including: a controller and a backlight module electrically connected;
  • the backlight module is configured to provide a backlight under the control of the controller
  • the controller includes a partition dimming unit and a control unit; the control unit is electrically connected to the partition dimming unit, and the partition dimming unit is electrically connected to the backlight module;
  • the zone dimming unit is configured to divide the backlight into a plurality of lamp zones according to the zone control signal upon receiving the zone 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 lamp areas and the pixel gray scale value of each pixel; determine the light area according to the number of pixels and the gray scale value of each pixel Brightness parameter; sending the partition control signal and 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 lamp area according to the brightness parameter.
  • the zoned dimming unit includes zoned subunits and dimming subunits
  • the zoning subunit is configured to divide the backlight into a plurality of lamp zones according to the zoning control signal
  • the dimming subunit is configured to obtain the brightness parameter, and update the brightness value of the lamp area in the on state; the updated brightness value is equal to the brightness parameter; for the lamp area in the off state, Keep off.
  • 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 lamp areas and the pixel gray scale 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 lamp area, the pixel grayscale value of each pixel, and the brightness parameter;
  • the operation subunit is configured to calculate the average value of each pixel gray scale value corresponding to each of the light areas according to the number of pixels and each of the pixel gray scale values, and calculate the average value of each of the light area corresponding to The average value of the grayscale values of each pixel is used as the brightness parameter of the lamp area.
  • the system further includes a display panel, the display panel is located on the light output side of the backlight module, and the display panel is electrically connected to the control unit;
  • the controller also includes a color a compensation unit, 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 lighting state; determine compensation parameters 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 picture in the display panel corresponding to each of the lamp areas in the lighting state; determine edge pixels according to the picture pixels in the display picture; determine the picture pixel The number of pixels in the picture; the compensation area of each edge pixel is determined according to the number of pixels in the picture; wherein, the compensation area includes pixels other than the picture pixels in the pixels corresponding to the light area in the lit state some other pixels;
  • 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 compensation sub-areas and the number of brightness compensation levels the same quantity;
  • 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
  • the compensation parameters in each brightness compensation level are greater than or The pixel grayscale equal to zero grayscale and smaller than the edge pixel.
  • the compensation parameter of each compensation sub-area gradually decreases along a first direction, and the first direction is a direction in which the area where the picture pixel is located points to the compensation area.
  • the embodiments of the present application provide a display device, including the adjustment system as described above.
  • Fig. 1a and Fig. 1b are the principle explanatory schematic diagrams that a kind of halo phenomenon that the embodiment of the present application produces;
  • FIG. 2 is a flow chart of a method for adjusting brightness provided by an embodiment of the present application
  • Fig. 3a is a schematic diagram of arrangement of lamp areas of a backlight provided by an embodiment of the present application.
  • Fig. 3b is a schematic diagram of pixel arrangement in the pixel region corresponding to one of the lamp regions in Fig. 3a;
  • Fig. 4a is a schematic diagram of the state of the lamp area of a backlight provided by the embodiment of the present application.
  • FIG. 4b is a schematic diagram of the halo phenomenon in the pixel area corresponding to the lamp area shown in FIG. 4a;
  • Fig. 5a is a schematic diagram of the lamp area state of another backlight provided by the embodiment of the present application.
  • FIG. 5b is a schematic diagram of the halo improvement effect of the pixel area corresponding to the light area shown in FIG. 5a;
  • Fig. 6a is the arrangement of the backlight area provided by the embodiment of the present application with 4*4 divisions;
  • FIG. 6b is a schematic diagram of a pixel area corresponding to the backlight shown in FIG. 6a;
  • Fig. 7a is a schematic structural diagram of a brightness adjustment system provided by an embodiment of the present application.
  • Fig. 7b is a schematic structural diagram of another brightness adjustment system provided by the embodiment of the present application.
  • FIG. 8 is a contrast curve of backlight brightness before and after brightness adjustment provided by the embodiment of the present application.
  • plural means two or more; the orientation or positional relationship indicated by the term “upper” is based on the orientation or positional relationship shown in the drawings, It is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the structures or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
  • the display device For a display device with a local dimming function, the display device includes a backlight module and a display panel. If the backlight of the backlight module is divided into five areas, these five areas can be controlled separately; when the third of the backlight When the area (Area3) is on and other areas are off, under ideal conditions, as shown in Figure 1a, 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 1.
  • the light intensity is 0; however, in practical applications, due to the light leakage of the display panel, as shown in Figure 1b, the light intensity at the position of the display panel corresponding to the third area (Area3) is weakened, which is different from the third area The position of the display panel corresponding to other adjacent areas of (Area3) shows a certain brightness.
  • the halo phenomenon reduces the display effect.
  • the abscissa in FIG. 1a and FIG. 1b are different regions corresponding to the backlight source, and the ordinate is the light intensity (Intensity).
  • the case where the average luminance of the display device is low includes: a partial area of the display screen is a white screen, and most areas are a black screen. In this case, the "halo" phenomenon is more obvious.
  • an embodiment of the present application provides a brightness adjustment method, which is applied to a display device, and the display device includes a backlight module, as shown in FIG. 2 , the adjustment method includes:
  • the backlight source can be divided into 9 lamp areas, 16 lamp areas or 25 lamp areas.
  • its state can be controlled independently, for example: to control a lamp area to be on or off; it can also control its brightness independently, for example to control a lamp area independently to increase its brightness or decrease.
  • Fig. 3a shows a schematic diagram of dividing the backlight source of the backlight module into 16 lamp areas, and each block in Fig. 3a represents a lamp area.
  • the backlight module may be an LED (Light Emitting Diode) backlight module, or may be a Mini LED (Mini Light Emitting Diode) backlight module.
  • LED Light Emitting Diode
  • Mini LED Mini Light Emitting Diode
  • each lamp area may include at least one LED lamp; or, each lamp area may include at least one Mini LED lamp.
  • the Mini LED backlight module can be an AM Mini LED (Active Matrix Mini Light Emitting Diode, actively driving a micro light emitting diode) backlight module; or, the Mini LED backlight module can be a PM Mini LED (Passive Matrix Mini Light Emitting Diode, passive drive light-emitting diode) backlight module.
  • AM Mini LED Active Matrix Mini Light Emitting Diode, actively driving a micro light emitting diode
  • PM Mini LED Passive Matrix Mini Light Emitting Diode, passive drive light-emitting diode
  • Fig. 3b shows a schematic diagram of pixel arrangement in the pixel region corresponding to one of the light regions in Fig. 3a.
  • the pixel area corresponding to one light area includes pixels arranged in 5*5 as shown in FIG. 3b.
  • the number of pixels in the pixel area of the display panel corresponding to each lamp area and the pixel gray scale value of each pixel are acquired through a timing controller (TCON).
  • each lamp area corresponds to a brightness parameter. It can be understood that the adjustment parameters of each lamp area are determined by the number of pixels and the pixel gray scale value corresponding to each lamp area.
  • each lamp area is adjusted separately according to the severity of the halo phenomenon in different areas.
  • the brightness parameters of each lamp area may be the same; or, the brightness parameters of each lamp area may be different.
  • the process of adjusting the brightness of each lamp area is determined by the brightness parameters. Specifically, for the lamp area whose initial state is in the off state, after the brightness adjustment, the lamp area is still in the off state; for the lamp area in the initial state in the on state, the brightness of the lamp area after adjustment is the brightness corresponding to the brightness parameter .
  • the brightness adjustment method provided by the embodiment of the present application involves obtaining the number of pixels and grayscale values of pixels in the pixel area corresponding to the lamp area during the brightness adjustment process, it is still aimed at each backlight source in the end.
  • the brightness of the lamp area is adjusted.
  • the brightness is adjusted by adjusting the anode voltage corresponding to each Mini LED light-emitting chip.
  • the brightness parameter is determined according to the number of pixels and the gray scale value of pixels in the pixel area corresponding to each lamp area, and the lamp is adjusted according to the brightness parameter.
  • each lamp area corresponds to a brightness parameter, so each lamp area can be adjusted separately according to the severity of the halo phenomenon in different areas, and the halo phenomenon can be reduced while reducing the brightness. Brightness adjustment is more targeted, and the effect of brightness adjustment is better.
  • step S904 adjusting the brightness of the lamp area according to the brightness parameter includes:
  • the brightness parameter may be a gray scale value representing the brightness of a lamp area, and according to the gray scale 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.
  • the gray scale value of each pixel in the corresponding pixel area is zero, and the brightness parameter is also zero, and the light area in the extinguished state , remains off.
  • step S903 determining the brightness parameters of the lamp area according to the number of pixels and the gray scale value of each pixel includes:
  • FIG. 4a is a schematic diagram of each lamp area of the backlight
  • the part marked E is the lamp area in the extinguished state
  • the part marked L is the lamp area in the lit state
  • FIG. 4b is the pixel area corresponding to the light area shown in FIG. 4a. It can be seen that the pixel area shown in FIG. 4b presents an obvious "halo" phenomenon, which seriously reduces the display effect.
  • halo phenomenon can be understood as the center area of the pixel area corresponding to the four lighted lamp areas, and the light around the center area presents a halo from bright to dark, which is represented by a circle in Figure 4b Simple gesture.
  • the pixel area corresponding to the light area refers to the pixel area in the display panel where the orthographic projection on the backlight module falls into the light area.
  • the brightness adjustment method of this application is specifically described as follows:
  • the backlight source of the backlight module is divided into a plurality of lamp areas as shown in FIG. 4a.
  • the lamp area in the on state update its brightness value; the updated brightness value is equal to the brightness parameter; for the lamp area in the off state, keep the off state.
  • the brightness of each lamp area in the lighting state shown in Figure 4a is adjusted to obtain a schematic diagram of the backlight as shown in Figure 5a
  • Figure 5b is the corresponding lamp area of Figure 5a
  • FIG. 5b it can be seen that after the brightness of the lamp area is adjusted, the halo problem in the corresponding pixel area is significantly reduced.
  • the initial brightness (Initial) is 100%
  • the number of pixels in the pixel area corresponding to the light area is 3556
  • 200 pixels display a white picture
  • the brightness of the lamp area in the lit state is changed from The original 100% is adjusted to 5.6%.
  • Fig. 8 schematically shows the initial brightness of the lamp area and the brightness curve adjusted by the brightness adjustment method of the present application, wherein the abscissa of the curve is the wavelength, and the ordinate is the brightness.
  • the display device further includes a display panel, and the display panel is located on the light emitting side of the backlight module;
  • step S904 after adjusting the brightness of the lamp area according to the brightness parameter, the method further includes:
  • the compensation area of the display panel refers to: according to the display screen corresponding to each lamp area in the lit state, the edge pixels of the picture pixels are determined, and then the de-screening corresponding to each lamp area in the lit state is determined according to the edge pixels Pixels other than pixels.
  • the picture pixels refer to the pixels that are being used to display pictures, that is to say, when a partial area of the display panel displays a picture and the remaining area is in a black state, the pixels located in the area where the picture is being displayed can be called a picture. pixels.
  • Fig. 7a shows the layout of the backlight with 4*4 lamp areas
  • Fig. 7b shows the corresponding pixel area of the backlight shown in Fig. 7a
  • the pixel area corresponding to each lamp area includes 25 pixels
  • the area marked PP in FIG. 7b is the area of the display screen, and the pixels in this area are called picture pixels.
  • the picture pixels include edge pixels, wherein the edge pixels are pixels located at the edge of the white area (area of the display picture) at the black-and-white boundary; the black-white boundary refers to the boundary between the display picture area and the black state area.
  • the picture pixels are marked with “ ⁇ , and ⁇ ” are edge pixels.
  • 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 on state.
  • the orthographic projections of the areas where the above-mentioned other pixels are located on the backlight module are located in the illuminated lamp area, and their orthographic projections on the backlight module do not overlap with the orthographic projections of the picture pixels on the backlight module.
  • the pixel area corresponding to the light area refers to the pixel area in the display panel where the orthographic projection on the backlight module falls into the light area.
  • a compensation area corresponding to an edge pixel includes at least one compensation parameter, and before determining the compensation parameter, the compensation area is divided into at least one compensation sub-area, each compensation sub-area corresponds to a compensation parameter; the compensation parameters of each compensation sub-area are different, In addition, the compensation parameters of each compensation sub-area gradually decrease along a first direction, and the first direction is a direction in which the area where the picture pixel is located points to the compensation area.
  • the compensation parameter of the compensation sub-area is zero gray scale.
  • one compensation sub-area corresponds to one brightness compensation level
  • one brightness compensation level corresponds to one pixel gray scale value
  • the pixel gray scale values corresponding to each brightness compensation level are greater than or equal to zero gray level and smaller than the grayscale value of the edge pixel corresponding to the compensation area.
  • the edge pixels refer to the pixels located at the edge of the white area at the black-and-white junction; the black-and-white junction refers to the border between the display image area and the black state area.
  • the area marked PP is the area of the display screen, which includes a plurality of picture pixels, and the picture pixels are marked with " ⁇ , and ⁇ ” are edge pixels.
  • the brightness adjustment method provided by the embodiment of this application can also determine the compensation area according to the lamp area in the lit state, and the compensation area is the part of the pixel area corresponding to the lamp area in the lit state except for the picture pixels.
  • step S905 determining the compensation area according to each lamp area in the lighting state includes:
  • Fig. 6a shows the layout of the backlight with 4*4 lamp areas
  • Fig. 6b shows the corresponding pixel area of the backlight shown in Fig. 6a
  • the pixel area corresponding to each lamp area includes 25 pixels
  • the area marked PP in FIG. 6b is the area of the display screen
  • the pixels in this area are called picture pixels.
  • the edge pixels are pixels located at the edge of the white area at the black-and-white boundary; the black-and-white boundary refers to the boundary between the display image area and the black state area.
  • the picture pixels are marked with “ ⁇ , and ⁇ ” are edge pixels.
  • the specific manner of determining the number of picture pixels is not limited here.
  • S9054 Determine the compensation area of each edge pixel according to the number of 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 lighted state.
  • the orthographic projection of the compensation area on the backlight module is located in the illuminated lamp area, 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.
  • each compensation area is also located in the lamp area 6, the lamp area 7, the lamp area 10 and the lamp area.
  • the pixels in the compensation area do not include picture pixels.
  • each edge pixel corresponds to a compensation area
  • the compensation areas corresponding to all the edge pixels in the picture pixels together form a buffer, and the pixels in the buffer are arranged around the picture pixels.
  • a dynamic parameter X is also involved, and the number of pixels included in each compensation area can be jointly determined according to the number of picture pixels and the dynamic parameter X.
  • the dynamic parameter X is related to the contrast of different types of display devices. In practical applications, the higher the contrast, the smaller the dynamic parameter X may be.
  • the dynamic parameter X is related to the area of the expanded area of the halo, and the larger the area of the expanded area of the halo, the larger the dynamic parameter X can be.
  • the area of the expanded area of the halo is the area of the elliptical halo minus the area of the pixel area corresponding to the four light areas in the lit state, and the area of the expanded area of the halo It is actually a ring-like area.
  • the number of brightness compensation levels is 5 or 6 since the number of pixels in the compensation area B is smaller than the number of brightness compensation levels, the two pixels in the compensation area B can be directly inserted into black.
  • the edge pixels of , the area where the compensation area is located is marked as C.
  • the number of brightness compensation levels is 5 or 6 since the number of pixels in the compensation area C is smaller than the number of brightness compensation levels, the two pixels in the compensation area C can be directly inserted into black.
  • the black insertion process can be understood as adjusting the grayscale of the pixel to the L0 grayscale.
  • the compensation areas of other edge pixels are determined in a similar manner to this edge pixel, and the compensation areas corresponding to all edge pixels together form a buffer, and the pixels in the buffer are arranged around the picture pixels.
  • step S906 determining the compensation parameters of the compensation area includes:
  • the compensation parameters of each pixel in the compensation area are set to zero grayscale (L0); if the pixels in the compensation area The number is 4, and the number of brightness compensation levels is 5, then the compensation parameters of each pixel in the compensation area are set to zero grayscale (L0).
  • the brightness adjustment process is divided into multiple brightness compensation levels according to different brightness adjustment ranges; different brightness compensation levels have different degrees of brightness adjustment.
  • the number of brightness compensation energy levels is related to the number of pixels included in the compensation area, which can be adjusted according to the actual situation, and is not limited here.
  • the number of brightness compensation levels is related to the processing precision of the image quality engine.
  • the processing precision of the image quality engine is 8 bits
  • the maximum number of brightness compensation levels can include 256.
  • the maximum number of brightness compensation levels can include 1024.
  • HDR High-Dynamic Range, high dynamic range
  • SDR Standard Dynamic Range, ordinary dynamic range
  • the brightness range of the display device is 200 -300nits
  • the processing precision of the internal image quality engine is 8bits.
  • the brightness requirements of the display device are: 10% central white screen requires brightness ⁇ 1000 nits, corner black state brightness ⁇ 0.05 nits;
  • the image quality engine processing precision is 10bits.
  • step S906 determining the compensation parameters of the compensation area includes:
  • Step S9063 determining the number of pixels in the compensation area
  • Step S9064 when the number of pixels in the compensation area is greater than or equal to the number of brightness compensation levels, divide the compensation area into a plurality of compensation sub-areas; the number of compensation sub-areas is the same as the number of brightness compensation levels;
  • the pixels in the same compensation sub-area correspond to the same brightness compensation level, and 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 smaller than the pixel grayscale of edge pixels.
  • the compensation parameters of each compensation sub-area gradually decrease along a first direction, and the first direction is a direction in which the area where the picture pixel is located points to the compensation area.
  • the compensation area can 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.
  • the number of brightness compensation energy levels can include up to 1024.
  • Table 1 provides a compensation parameter table with 6 brightness compensation levels.
  • Table 1 Compensation parameter table of the first brightness compensation level
  • the first compensation sub-area includes 4 pixels, the corresponding brightness compensation energy level is 5, and the corresponding compensation parameter is L900;
  • the second compensation sub-area includes 4 pixels, the corresponding brightness compensation energy level is 4, and the corresponding compensation parameter is L700;
  • the third compensation sub-area includes 4 pixels, the corresponding brightness compensation energy level is 3, and the corresponding compensation parameter is L500;
  • the fourth compensation sub-area includes 4 pixels, the corresponding brightness compensation energy level is 2, and the corresponding compensation parameter is L300;
  • the fifth compensation sub-area includes 4 pixels, the corresponding brightness compensation energy level is 1, and the corresponding compensation parameter is L100;
  • the sixth compensation sub-area includes 4+3 (remainder) pixels, the corresponding brightness compensation energy level is 0, and the corresponding compensation parameter is L0.
  • the grayscale corresponding to the lowest brightness compensation level (Rank 0) is the L0 grayscale
  • the grayscale corresponding to the highest brightness compensation level (Rank 5) is smaller than the pixel grayscale of the edge pixels
  • the other brightness compensation levels correspond to The gray scale is between these two gray scales and can be adjusted according to the actual situation.
  • the maximum number of brightness compensation levels can be 256.
  • Table 2 provides a compensation parameter table with 5 brightness compensation levels.
  • Table 2 Compensation parameter table in the second brightness compensation level
  • the first compensation sub-area includes 5 pixels, the corresponding brightness compensation energy level is 4, and the corresponding compensation parameter is L200;
  • the second compensation sub-area includes 3 pixels, the corresponding brightness compensation energy level is 3, and the corresponding compensation parameter is L150;
  • the third compensation sub-area includes 5 pixels, the corresponding brightness compensation energy level is 2, and the corresponding compensation parameter is L100;
  • the fourth compensation sub-area includes 5 pixels, the corresponding brightness compensation energy level is 1, and the corresponding compensation parameter is L50;
  • the fifth compensation sub-area includes 5+2 (remainder) pixels, the corresponding brightness compensation energy level is 0, and the corresponding compensation parameter is L0.
  • the grayscale corresponding to the lowest brightness compensation level (Rank 0) is the L0 grayscale
  • the grayscale corresponding to the highest brightness compensation level (Rank 4) is smaller than the pixel grayscale of the edge pixels
  • the other brightness compensation levels correspond to The gray scale is between these two gray scales and can be adjusted according to the actual situation.
  • 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 processed by black insertion .
  • 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-area corresponding to the brightness compensation energy level of 0 are subjected to black insertion processing (L0 gray scale ), and as the brightness compensation energy level gradually decreases (gray scale value decreases), the distance between the corresponding compensation sub-area and the area where the picture pixels are located is farther; for all pixels in the compensation sub-area with the largest brightness compensation energy level, The grayscale value corresponding to the compensation parameter is smaller than the grayscale value of the edge pixels.
  • each compensation area can be divided into a greater number of compensation sub-areas, Therefore, the brightness of each compensation sub-area can be adjusted separately to meet the higher image quality requirements of the HDR display device.
  • the brightness compensation level corresponding to each compensation sub-area gradually decreases along the direction of the arrow shown in FIG. 6b ( grayscale value decreases).
  • the compensation area corresponding to each edge pixel includes at least one compensation sub-area, and each compensation sub-area includes at least one pixel.
  • the specific arrangement of the pixels in each compensation sub-area can be combined with the actual compensation area. It depends on the number of pixels and the severity of the halo, and there is no limitation here.
  • the brightness adjustment method provided by the embodiment of this application can determine the compensation area according to the lamp area in the lighting state, and directly adjust all the pixels in the compensation area when the number of pixels in the compensation area is less than the number of brightness compensation energy levels Perform black insertion processing, and when the number of pixels in the compensation area is greater than or equal to the number of brightness compensation energy levels, divide the compensation area into multiple compensation sub-areas, and adjust the brightness of the pixels in each compensation sub-area to different degrees, Therefore, the halo phenomenon can be further reduced, the display effect of the display device can be improved, and the image quality can be improved.
  • the embodiment of the present application provides a brightness adjustment system, as shown in FIG. 7a, comprising: a controller 400 and a backlight module 500 electrically connected;
  • the backlight module 400 is configured to provide a backlight under the control of the controller 500;
  • 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;
  • the zone dimming unit 402 is configured to divide the backlight into multiple lamp zones according to the zone control signal upon receiving the zone control signal sent by the control unit 401;
  • the control unit 401 is configured to obtain and store the number of pixels in the pixel area corresponding to each lamp area and the pixel gray scale value of each pixel; determine the brightness parameter of the lamp area according to the number of pixels and the gray scale value of each pixel; issue a partition control signal and Dimming signal;
  • the zone dimming unit 402 is further configured to obtain a brightness parameter after receiving the dimming signal, and adjust the brightness of the lamp area according to the brightness parameter.
  • the controller 400 may be a timing controller (TCON)
  • the zone dimming unit 402 may be a zone dimming controller (LDC, Local dimming controller)
  • the control unit 401 may be a multi-point control device ( MCU, Microcontroller Unit).
  • the above-mentioned backlight module may be a Mini LED type backlight module, or may also be a Micro LED type backlight module, which is determined according to the actual situation and is not limited here.
  • the system also includes a PC motherboard or a video capture card (Graphics Cards) 700, and the PC motherboard or the video capture card 700 can be connected to the controller 400 through an EDP interface, so that the video stream signal Transmission to the controller 400, through the various modules in the controller 400 to carry out logical operations on the video stream signal, the obtained brightness signal is transmitted to the backlight module 500 through the SPI interface, thereby controlling the brightness of the backlight source of the backlight module, in In practical applications, the controller 400 is electrically connected to the backlight module 500 through the LED driver.
  • a PC motherboard or a video capture card (Graphics Cards) 700 can be connected to the controller 400 through an EDP interface, so that the video stream signal Transmission to the controller 400, through the various modules in the controller 400 to carry out logical operations on the video stream signal, the obtained brightness signal is transmitted to the backlight module 500 through the SPI interface, thereby controlling the brightness of the backlight source of the backlight module, in In practical applications, the controller 400 is electrically connected to the backlight module 500 through the LED driver
  • EDP interface is an all-digital interface based on the DisplayPort architecture and protocol, which can transmit high-resolution signals with simpler connectors and fewer pins, and can simultaneously transmit multiple data.
  • SPI Serial Peripheral Interface-Serial Peripheral Interface
  • the number of pixels and the grayscale value of pixels in the pixel area corresponding to each lamp area can be obtained, and the brightness parameter can be determined according to the number of pixels and the grayscale value of the pixel.
  • the brightness of the lamp area is adjusted. Since each lamp area corresponds to a brightness parameter during the brightness adjustment process, each lamp area can be adjusted separately according to the severity of the halo phenomenon in different areas. While reducing the halo phenomenon, Brightness adjustment is more targeted, and the effect of brightness adjustment is better.
  • the zone dimming unit 402 includes zone subunits and dimming subunits
  • the zoning subunit is configured to divide the backlight into multiple lamp zones according to the zoning control signal
  • the dimming sub-unit is configured to obtain the brightness parameter, and update the brightness value of the lamp area in the on state; the updated brightness value is equal to the brightness parameter; and keep the light off state for the lamp area in the off state.
  • control unit 401 includes a storage subunit, an acquisition subunit and an operation subunit;
  • the obtaining subunit is configured to obtain the number of pixels in the pixel area corresponding to each light area 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 lamp area, the pixel gray scale value of each pixel, and the brightness parameter; send the partition control signal and the dimming signal;
  • the operation sub-unit is configured to calculate the average value of the gray scale values of the multiple pixels corresponding to each light area according to the number of pixels and the gray scale values of the multiple pixels, and calculate the average value of the gray scale values of the multiple pixels corresponding to each light area As the brightness parameter of each lamp area.
  • the system further includes a display panel 600, the display panel 600 is located on the light-emitting side of the backlight module 500, and the display panel 600 is electrically connected to the control unit 401; the controller 400 also includes A color compensation unit 403, the color compensation unit 403 is electrically connected to the control unit 401;
  • 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;
  • the control unit 401 is further configured to adjust the brightness of the compensation area according to the compensation parameter.
  • the color compensation unit 403 may be an Accurate Color Capture (ACC), also called an Adjust Chromaticity Coordinate (ACC).
  • ACC Accurate Color Capture
  • ACC Adjust Chromaticity Coordinate
  • 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 red sub-pixels, green sub-pixels and blue sub-pixels, the red sub-pixel can be adjusted to pixels, green sub-pixels, and blue sub-pixels to adjust the overall picture color of the display panel.
  • the obtained brightness adjustment signal is transmitted to the backlight module 500 through the SPI interface.
  • the PC motherboard or the video capture card 700 and the controller 400 can be connected through the EDP interface, so as to transmit the video stream signal to the controller 400, and perform logic operations on the video stream signal through each module in the controller 400 , the brightness adjustment signal obtained through the calculation is transmitted to the display panel 600 through the SPI interface, thereby controlling the grayscale value of each pixel in the compensation area of the display panel.
  • the video stream can be adjusted by each module in the controller 400
  • the signals are logically operated and the corresponding signals are respectively transmitted to the backlight module 500 and the display panel 600 through the SPI interface, so as to adjust the brightness of the backlight and at the same time adjust the grayscale value of each pixel in the compensation area of the display panel.
  • the halo phenomenon can be reduced, and the display effect of the display device can be improved.
  • the color compensation unit 403 includes a first determining subunit and a second determining subunit
  • the first determining subunit is configured to determine the display screen in the display panel corresponding to each lamp area in the lighted state; determine the edge pixels according to the picture pixels in the display picture; determine the number of picture pixels; determine each according to the number of picture pixels The compensation area of edge 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 on state;
  • the second determining subunit is configured to determine the number of pixels in the compensation area; in the case that 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; the number of pixels in the compensation area is greater than or When it is equal to the number of brightness compensation levels, the compensation area is divided into a plurality of compensation sub-areas, and the number of compensation sub-areas is the same as the number of brightness compensation levels;
  • the pixels in the same compensation sub-area correspond to the same brightness compensation level, and 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 smaller than the pixel grayscale of edge pixels.
  • the compensation parameters of each compensation sub-area gradually decrease along a first direction, and the first direction is a direction in which the area where the picture pixel is located points to the compensation area.
  • An embodiment of the present application provides a display device, including the adjustment system as described above.
  • 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 notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.
  • the other essential components of the display device should be understood by those of ordinary skill in the art, and will not be repeated here, nor should they be regarded as limitations on the present invention.
  • For the brightness adjustment process of the display device reference may be made to the above detailed description of the adjustment system or the embodiment of the brightness adjustment method, and repeated descriptions will not be repeated.

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Abstract

本申请提供了一种亮度调节方法、调节系统、显示装置，该亮度调节方法应用于显示装置，所述显示装置包括背光模组，所述调节方法包括：将所述背光模组的背光源分为多个灯区；获取每个所述灯区对应的像素区域中的像素数量和各像素的像素灰阶值；根据所述像素数量和各所述像素灰阶值确定所述灯区的亮度参数；根据所述亮度参数，对所述灯区的亮度进行调节。由于该亮度调节过程中，每一个灯区对应一个亮度参数，从而可以根据不同区域光晕现象的严重程度，对各灯区分别进行调节，在减轻光晕现象的同时，进行亮度调节的针对性更强，亮度调节的效果更好。

Description

亮度调节方法、调节系统、显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种亮度调节方法、调节系统、显示装置。
背景技术
随着显示技术的快速发展，行业中对显示产品的背光源的性能要求越来越高。对于具有局部调光功能的背光源制备的显示产品，在背光源的局部区域点亮，其它区域熄灭的情况下，对于低对比度的显示产品，极易出现围绕点亮区域的光晕，从而降低了该显示产品的显示效果。
发明内容
本申请的实施例采用如下技术方案：
一方面，本申请的实施例提供了一种亮度调节方法，其中，应用于显示装置，所述显示装置包括背光模组，所述调节方法包括：
将所述背光模组的背光源分为多个灯区；
获取每个所述灯区对应的像素区域中的像素数量和各像素的像素灰阶值；
根据所述像素数量和各所述像素灰阶值确定所述灯区的亮度参数；
根据所述亮度参数，对所述灯区的亮度进行调节。
在本申请的一些实施例中，所述根据所述亮度参数，对所述灯区的亮度进行调节包括：
对于点亮状态的所述灯区，更新其亮度值；更新后的亮度值等于所述亮度参数；
对于熄灭状态的所述灯区，保持熄灭状态。
在本申请的一些实施例中，所述根据所述像素数量和各所述像素灰阶值确定各所述灯区的亮度参数包括：
根据所述像素数量和各所述像素灰阶值，对每个所述灯区对应的各所述像素灰阶值求平均值；
将每个所述灯区对应的各所述像素灰阶值的平均值作为所述灯区的亮度参数。
在本申请的一些实施例中，所述显示装置还包括显示面板，所述显示面板位于所述背光模组的出光侧；所述根据所述亮度参数，对所述灯 区的亮度进行调节之后，所述方法还包括：
根据处于点亮状态的各所述灯区，确定所述显示面板的补偿区；
确定所述补偿区的补偿参数；
根据所述补偿参数对所述补偿区进行亮度调节。
在本申请的一些实施例中，所述根据处于点亮状态的各所述灯区，确定补偿区包括：
确定处于点亮状态的各所述灯区对应的所述显示面板中的显示画面；
根据所述显示画面中的画面像素确定边缘像素；
确定所述画面像素的数量；
根据所述画面像素的数量确定各所述边缘像素的所述补偿区；其中，所述补偿区包括与点亮状态的所述灯区对应的像素中除所述画面像素之外的部分其它像素。
在本申请的一些实施例中，所述确定所述补偿区的补偿参数包括：
确定所述补偿区的像素数量；
在所述补偿区的像素数量小于亮度补偿层级的数量的情况下，所述补偿区的补偿参数确定为零灰阶。
在本申请的一些实施例中，所述确定所述补偿区的补偿参数包括：
确定所述补偿区的像素数量；
在所述补偿区的像素数量大于或者等于所述亮度补偿层级的数量的情况下，将所述补偿区划分为多个补偿子区；所述补偿子区的数量和所述亮度补偿层级的数量相同；
其中，同一所述补偿子区中的像素对应同一个所述亮度补偿层级，同一个所述亮度补偿层级中的所述补偿参数相同，且各所述亮度补偿层级中的所述补偿参数大于或等于零灰阶、小于所述边缘像素的像素灰阶。
在本申请的一些实施例中，各所述补偿子区的补偿参数沿第一方向逐渐减小，所述第一方向为所述画面像素所在的区域指向所述补偿区的方向。
另一方面，本申请的实施例提供了一种亮度调节系统，包括：电连接的控制器和背光模组；
所述背光模组被配置为在所述控制器的控制下提供背光源；
其中，所述控制器包括分区调光单元和控制单元；所述控制单元和 所述分区调光单元电连接，所述分区调光单元和所述背光模组电连接；
所述分区调光单元被配置为在接收到所述控制单元发出的分区控制信号的情况下，根据所述分区控制信号将所述背光源分为多个灯区；
所述控制单元被配置为获取并存储每个所述灯区对应的像素区域的像素数量和各像素的像素灰阶值；根据所述像素数量和各所述像素灰阶值确定所述灯区的亮度参数；发出所述分区控制信号和调光信号；
所述分区调光单元还被配置为在接收到所述调光信号后，获取所述亮度参数，并根据所述亮度参数，对所述灯区的亮度进行调节。
在本申请的一些实施例中，所述分区调光单元包括分区子单元和调光子单元；
所述分区子单元被配置为根据所述分区控制信号将所述背光源分为多个灯区；
所述调光子单元被配置为获取所述亮度参数，对于点亮状态的所述灯区，更新其亮度值；更新后的亮度值等于所述亮度参数；对于熄灭状态的所述灯区，保持熄灭状态。
在本申请的一些实施例中，所述控制单元包括存储子单元、获取子单元和运算子单元；
所述获取子单元被配置为获取每个所述灯区对应的像素区域的像素数量和各像素的像素灰阶值；
所述存储子单元被配置为存储所述分区控制信号、所述调光信号、所述灯区对应的像素区域的像素数量和各所述像素的像素灰阶值、所述亮度参数；发出所述分区控制信号和所述调光信号；
所述运算子单元被配置为根据所述像素数量和各所述像素灰阶值，对每个所述灯区对应的各所述像素灰阶值求平均值，将每个所述灯区对应的各所述像素灰阶值的平均值作为所述灯区的亮度参数。
在本申请的一些实施例中，所述系统还包括显示面板，所述显示面板位于所述背光模组的出光侧，所述显示面板和所述控制单元电连接；所述控制器还包括色彩补偿单元，所述色彩补偿单元和所述控制单元电连接；
所述色彩补偿单元被配置为根据处于点亮状态的各所述灯区，确定所述显示面板的补偿区；确定所述补偿区的补偿参数；
所述控制单元还被配置为根据所述补偿参数对所述补偿区进行亮 度调节。
在本申请的一些实施例中，所述色彩补偿单元包括第一确定子单元和第二确定子单元；
所述第一确定子单元被配置为确定处于点亮状态的各所述灯区对应的所述显示面板中的显示画面；根据所述显示画面中的画面像素确定边缘像素；确定所述画面像素的数量；根据所述画面像素的数量确定各所述边缘像素的所述补偿区；其中，所述补偿区包括与点亮状态的所述灯区对应的像素中除所述画面像素之外的部分其它像素；
所述第二确定子单元被配置为确定所述补偿区的像素数量；在所述补偿区的像素数量小于亮度补偿层级的数量的情况下，所述补偿区的补偿参数确定为零灰阶；在所述补偿区的像素数量大于或者等于所述亮度补偿层级的数量的情况下，将所述补偿区划分为多个补偿子区，且所述补偿子区的数量和所述亮度补偿层级的数量相同；
其中，同一所述补偿子区中的像素对应同一个所述亮度补偿层级，同一个所述亮度补偿层级中的所述补偿参数相同，且各所述亮度补偿层级中的所述补偿参数大于或等于零灰阶、小于所述边缘像素的像素灰阶。
在本申请的一些实施例中，各所述补偿子区的补偿参数沿第一方向逐渐减小，所述第一方向为所述画面像素所在的区域指向所述补偿区的方向。
又一方面，本申请的实施例提供了一种显示装置，包括如上所述的调节系统。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
为了更清楚地说明本申请实施例或相关技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1a和图1b为本申请实施例提供的一种光晕现象产生的原理解 释示意图；
图2为本申请实施例提供的一种亮度调节方法流程图；
图3a为本申请实施例提供的一种背光源的灯区排布示意图；
图3b为图3a中的其中一个灯区对应的像素区域中的像素排布示意图；
图4a为本申请实施例提供的一种背光源的灯区状态示意图；
图4b为图4a所示的灯区对应的像素区域的光晕现象示意图；
图5a为本申请实施例提供的另一种背光源的灯区状态示意图；
图5b为图5a所示的灯区对应的像素区域的光晕改善效果示意图；
图6a为本申请实施例提供的背光源分区为4*4的灯区排布；
图6b为图6a所示的背光源对应的像素区域的示意图；
图7a为本申请实施例提供的一种亮度调节系统的结构示意图；
图7b为本申请实施例提供的另一种亮度调节系统的结构示意图；
图8为本申请的实施例提供的亮度调节前后的背光亮度对比曲线。
具体实施例
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在图中，为了清晰，可能夸大了区域和层的厚度。在图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。此外，附图仅为本公开的示意性图解，并非一定是按比例绘制。
在本申请的实施例中，除非另有说明，“多个”的含义是两个或两个以上；术语“上”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的结构或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一个实施例”、“一些实施例”、“示例性实施例”、“示例”、“特定示例”或“一些示例”等旨在表明与该实施例 或示例相关的特定特征、结构、材料或特性包括在本申请的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
在本申请的实施例中，采用“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分，仅为了清楚描述本申请实施例的技术方案，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。
相关技术中，对于具有局部调光功能的低对比度的显示装置，在显示画面的局部区域点亮，其它区域熄灭的情况下，由于点亮区域的部分光线能够透光熄灭区域漏出，从而出现“光晕”现象，该光晕围绕点亮区域，“光晕”现象极大的降低了显示装置的显示效果。需要说明的是，局部调光功能通过对背光源进行分区控制实现。
对于具有局部调光功能的显示装置，该显示装置包括背光模组和显示面板，若背光模组的背光源分为五个区域，这五个区域可以分别控制；当背光源中的第三个区域(Area3)点亮，其它区域熄灭时，在理想情况下，参考图1a所示，在第三个区域(Area3)对应的显示面板的位置测得的光强度为1，其它区域测得的光强度为0；然而，在实际应用中，由于显示面板存在漏光的情况，参考图1b所示，第三个区域(Area3)对应的显示面板的位置的光强度被削弱，与第三个区域(Area3)相邻的其它区域对应的显示面板的位置处呈现出一定的亮度，在显示装置的平均亮度较低的情况下，呈现出以第三个区域(Area3)为中心，向四周逐渐扩散的光晕现象，降低了显示效果。其中，图1a和图1b中的横坐标为背光源对应的不同区域，纵坐标为光强度(Intensity)。
需要说明的是，显示装置的平均亮度较低的情况包括：显示画面中局部区域为白画面，大部分区域为黑画面的情况，此时，“光晕”现象较为明显。
目前，相关技术中存在两种减轻“光晕”现象的方法：第一、通过改善显示装置的设计，提高显示装置的对比度，从而降低处于熄灭状态的区域的漏光，以达到减轻“光晕”现象的效果。第二、通过缩小背光源中各分区的尺寸，增大背光源的分区数量，通过分区控制背光的方式，降低白画面对应的背光分区与相邻的黑画面对应的背光分区的亮度差 异，从而减轻“光晕”现象。然而，相关技术中的改善方法技术难度较大，且成本较高。
基于此，本申请的实施例提供了一种亮度调节方法，应用于显示装置，显示装置包括背光模组，参考图2所示，该调节方法包括：
S901、将背光模组的背光源分为多个灯区；
示例性的，可以将背光源分为9个灯区、16个灯区或25个灯区。对于分区之后的每一个灯区，可以单独控制其状态，例如：单独控制一个灯区处于点亮状态或者熄灭状态；也可以单独控制其亮度，例如单独控制一个灯区，使其亮度增大或减小。
图3a示出了将背光模组的背光源分为16个灯区的示意图，图3a中的每一个方块代表一个灯区。
这里对于背光模组的种类不做限定。在一些实施例中，背光模组可以是LED(Light Emitting Diode)背光模组，或者，可以是Mini LED(Mini Light Emitting Diode)背光模组。
示例性的，每个灯区可以包括至少一个LED灯；或者，每个灯区可以包括至少一个Mini LED灯。
在一些实施例中，Mini LED背光模组可以为AM Mini LED(Active Matrix Mini Light Emitting Diode，主动驱动微发光二极管)背光模组；或者，Mini LED背光模组可以为PM Mini LED(Passive Matrix Mini Light Emitting Diode，被动驱动发光二极管)背光模组。
S902、获取每个灯区对应的像素区域中的像素数量和各像素的像素灰阶值；
图3b示出了图3a中的其中一个灯区对应的像素区域中的像素排布示意图。示例性的，一个灯区对应的像素区域中包括如图3b所示的5*5排列的像素。
在实际应用中，通过时序控制器(TCON)获取每个灯区对应的显示面板的像素区域中的像素数量和各像素的像素灰阶值。
S903、根据像素数量和各像素灰阶值确定灯区的亮度参数；
在背光模组中，每一个灯区对应一个亮度参数，可以理解，各灯区的调节参数由各灯区对应的像素数量和像素灰阶值决定。
本申请的实施例在对背光的亮度进行调节时，根据不同区域光晕现象的严重程度，对各灯区分别进行调节。
示例性的，各灯区的亮度参数可以相同；或者，各灯区的亮度参数可以不同。
S904、根据亮度参数，对灯区的亮度进行调节。
在实际应用中，对各灯区进行亮度调节的过程由亮度参数决定。具体的，对于初始状态处于熄灭状态的灯区，进行亮度调节之后，该灯区仍旧处于熄灭状态；对于初始状态处于点亮状态的灯区，该灯区调节之后的亮度为亮度参数对应的亮度。
需要说明的是，本申请的实施例提供的亮度调节方法，虽然在亮度调节过程中涉及获取灯区对应的像素区域中的像素数量和像素灰阶值，但是最终仍旧是针对背光源中的各灯区进行亮度调节，在对各灯区的亮度进行调节时，以Mini LED背光模组为例，具体是通过调节各Mini LED发光芯片对应的阳极电压来调节亮度。
在本申请的实施例提供的调节方法中，通过获取每个灯区对应的像素区域中的像素数量和像素灰阶值，根据像素数量和像素灰阶值确定出亮度参数，根据亮度参数对灯区进行亮度调节，由于该亮度调节过程中，每一个灯区对应一个亮度参数，从而可以根据不同区域光晕现象的严重程度，对各灯区分别进行调节，在减轻光晕现象的同时，进行亮度调节的针对性更强，亮度调节的效果更好。
在本申请的一些实施例中，步骤S904、根据亮度参数，对灯区的亮度进行调节包括：
S9041、对于点亮状态的灯区，更新其亮度值；更新后的亮度值等于亮度参数；
在实际应用中，亮度参数可以是代表一个灯区亮度的灰阶值，根据该灰阶值，对该灯区中发光元件的阳极的电压值进行调节，以更新该灯区的亮度。
S9042、对于熄灭状态的灯区，保持熄灭状态。
由于灯区的亮度参数由像素灰阶值确定，对于熄灭状态的灯区，其对应的像素区域中各像素的灰阶值均为零，则亮度参数也为零，则处于熄灭状态的灯区，仍保持熄灭状态。
在本申请的一些实施例中，步骤S903、根据像素数量和各像素灰阶值确定灯区的亮度参数包括：
S9031、根据像素数量和各像素灰阶值，对每个灯区对应的各像素 灰阶值求平均值；
S9032、将每个灯区对应的各像素灰阶值的平均值作为灯区的亮度参数。
在实际应用中，对处于点亮状态(或熄灭状态)的每个灯区，对各灯区对应的像素区域中的像素灰阶值求平均值，将该平均值作为亮度参数，通过将各灯区的亮度调节为亮度参数对应的亮度值，降低了各灯区对应的像素区域中处于黑画面和处于白画面的像素对应的亮度差异，从而减轻了显示画面中的光晕显示，提高显示效果。
下面以图4a所示的包括有4*4个灯区的背光源为例，说明具体如何通过本申请的亮度调节方法改善光晕问题。其中，图4a为背光源的各灯区的示意图，标记E的部分为处于熄灭状态的灯区，标记L的部分为处于点亮状态的灯区。图4b为图4a所示的灯区对应的像素区域，可以看到，图4b所示的像素区域中呈现出明显的“光晕”现象，严重减低显示效果。
需要说明的是，“光晕”现象可以理解为以点亮的四个灯区对应的像素区域为中心区域，围绕中心区域呈现出的光线由亮到暗的光晕，在图4b中以圆圈简单示意。
灯区对应的像素区域是指：显示面板中，在背光模组上的正投影落入灯区内的像素区域。
本申请的亮度调节方法具体说明如下：
将背光模组的背光源分为图4a中所示的多个灯区。
获取每个灯区对应的图4b所示的各像素区域中的像素数量和各像素的像素灰阶值；图4b所示的各像素区域中的像素数量为25个，各像素的灰阶值为A1、A2、A3、A4、…..A25。
根据像素数量和各像素灰阶值，对每个灯区对应的各像素灰阶值求平均值；
将每个灯区对应的各像素灰阶值的平均值作为该灯区的亮度参数；则亮度参数＝(A1+A2+A3+A4+…..+A25)/25。
对于点亮状态的灯区，更新其亮度值；更新后的亮度值等于亮度参数；对于熄灭状态的灯区，保持熄灭状态。具体的，根据各自的亮度参数，对图4a所示的处于点亮状态的各灯区的亮度进行调节，得到如图5a所示的背光源的示意图，图5b为图5a的灯区对应的像素区域，根 据图5b可以看到，在灯区亮度调整之后，其对应的像素区域中的光晕问题有明显的减轻。
在一些实施例中，若背光源分为1152个灯区，一个灯区对应的像素数量为3556，该灯区中各像素的像素灰阶值分别为A1、A2、A3、A4、……A3556；则该灯区的亮度参数＝(A1+A2+A3+A4+…..+A3556)/3556，再根据每个灯区对应的亮度参数，对其亮度进行调节。
示例性的，若背光源中有一个灯区点亮，且初始亮度(Initial)为100％，该灯区对应的像素区域中的像素的数量为3556个，有200个像素显示白画面，按照上述亮度调节方法，该灯区的亮度参数(Renew)＝(100％*200+0+…+0)/3556＝5.6％；根据该亮度调节方法，将该点亮状态的灯区的亮度由原来的100％调整为5.6％。图8示意出了该灯区的初始亮度和采用本申请的亮度调节方法调节之后的亮度曲线，其中，该曲线的横坐标为波长，纵坐标为亮度。
在本申请的一些实施例中，显示装置还包括显示面板，显示面板位于背光模组的出光侧；
在步骤S904、根据亮度参数，对灯区的亮度进行调节之后，该方法还包括：
S905、根据处于点亮状态的各灯区，确定显示面板的补偿区；
显示面板的补偿区是指：根据处于点亮状态的各灯区对应的显示画面，确定出画面像素的边缘像素，再根据边缘像素确定出的与处于点亮状态的各灯区对应的除画面像素之外的部分像素。
需要说明的是，画面像素是指正在用于显示画面的像素，也就是说，当显示面板的局部区域显示画面，剩余区域为黑态时，位于正在显示画面的区域中的像素可以称为画面像素。示例性的，图7a示出了背光源分区为4*4的灯区排布，图7b为图7a所示的背光源对应的像素区域，每一个灯区对应的像素区域中包括25个像素，图7b中标记PP的区域为显示画面的区域，该区域中的像素称作画面像素。
画面像素包括边缘像素，其中，边缘像素是黑白交界处位于白色区域(显示画面的区域)边缘的像素；黑白交界是指显示画面的区域与黑态区域的交界。参考图7b所示，画面像素中标记“△、
Figure PCTCN2021121815-appb-000001
和▲”的像素为边缘像素。
可以理解，补偿区为与点亮状态的灯区对应的像素区域中除画面像 素之外的部分其它像素所在的区域。上述其它像素所在的区域在背光模组上的正投影位于点亮状态的灯区内，且其在背光模组上的正投影与画面像素在背光模组上的正投影互不交叠。另外，灯区对应的像素区域是指：显示面板中，在背光模组上的正投影落入灯区内的像素区域。S906、确定补偿区的补偿参数；
一个边缘像素对应的补偿区中包括至少一个补偿参数，在确定补偿参数之前，将补偿区分为至少一个补偿子区，每一个补偿子区对应于一个补偿参数；各补偿子区的补偿参数不同，且各补偿子区的补偿参数沿第一方向逐渐减小，第一方向为画面像素所在的区域指向补偿区的方向。
在补偿区只包括一个补偿子区的情况下，该补偿子区的补偿参数为零灰阶。
在补偿区包括多个补偿子区的情况下，一个补偿子区对应一个亮度补偿层级，一个亮度补偿层级对应一个像素灰阶值，且各亮度补偿层级对应的像素灰阶值均大于或等于零灰阶、且小于该补偿区对应的边缘像素的灰阶值。
其中，边缘像素是指黑白交界处位于白色区域边缘的像素；黑白交界是指显示画面的区域与黑态区域的交界。参考图6b所示，标记PP的区域为显示画面的区域，该区域包括多个画面像素，画面像素中标记“△、
Figure PCTCN2021121815-appb-000002
和▲”为边缘像素。
S907、根据补偿参数对补偿区进行亮度调节。
本申请的实施例提供的亮度调节方法，还能够根据处于点亮状态的灯区，确定出补偿区，补偿区为与点亮状态的灯区对应的像素区域中除画面像素之外的部分其它像素所在的区域；通过对补偿区中的像素进行不同程度的亮度调节，从而能够进一步减轻光晕现象，提高显示装置的显示效果，提高画质。
在本申请的一些实施例中，步骤S905、根据处于点亮状态的各灯区，确定补偿区包括：
S9051、确定处于点亮状态的各灯区对应的显示面板中的显示画面；
示例性的，图6a示出了背光源分区为4*4的灯区排布，图6b为图6a所示的背光源对应的像素区域，每一个灯区对应的像素区域中包括25个像素，图6b中标记PP的区域为显示画面的区域，该区域中的像素称作画面像素。
S9052、根据显示画面中的画面像素确定边缘像素；
其中，边缘像素是黑白交界处位于白色区域边缘的像素；黑白交界是指显示画面的区域与黑态区域的交界。参考图6b所示，画面像素中标记“△、
Figure PCTCN2021121815-appb-000003
和▲”的像素为边缘像素。
S9053、确定画面像素的数量；
这里对于确定画面像素数量的具体方式不做限定。
S9054、根据画面像素的数量确定各边缘像素的补偿区；其中，补偿区为与点亮状态的灯区对应的像素中除画面像素之外的部分其它像素所在的区域。
可以理解，补偿区在背光模组上的正投影位于点亮状态的灯区内，补偿区在背光模组上的正投影与画面像素在背光模组上的正投影互不交叠。
参考图6b所示，由于显示画面位于灯区6、灯区7、灯区10和灯区11对应的像素区域中，则各补偿区也位于灯区6、灯区7、灯区10和灯区11中对应的像素区域中，且补偿区中的像素不包括画面像素。
需要说明的是，每一个边缘像素，对应于一个补偿区，画面像素中所有的边缘像素对应的补偿区共同构成一个缓冲区，该缓冲区中的像素围绕画面像素设置。
另外，在确定补偿区时，还涉及一个动态参数X，每个补偿区中包括的像素数量可以根据画面像素的数量和动态参数X共同确定。
在一些实施例中，动态参数X与不同型号的显示装置的对比度相关，在实际应用中，对比度越高，动态参数X可以越小。
在一些实施例中，该动态参数X与光晕的外扩区域的面积相关，光晕的外扩区域的面积越大，动态参数X可以越大。需要说明的是，以图5b为例，光晕的外扩区域面积为椭圆形的光晕的面积减去处于点亮状态的4个灯区对应的像素区域的面积，光晕的外扩区域实际是一个类似环形的区域。
需要说明的是，在实际应用中，对补偿区进行亮度调节时，实际改变的是补偿区中各像素的像素电极电压。
下面以具体例子来说明如何确定补偿区：
若画面像素的数量为200，设定动态参数X＝20％时，每个边缘像素对应的补偿区中包括的像素数量＝200*20％＝40。
参考图6b所示，画面像素(图6b中标记PP的区域中的像素)的数量为16，设定动态参数X＝12.5％时，每个边缘像素对应的补偿区中包括的像素数量＝16*12.5％＝2，对于图6b中标记“▲”的边缘像素，其补偿区所在区域标记为B。在亮度补偿能级数量为5或6的情况下，由于补偿区B的像素数量小于亮度补偿能级数量，可以直接对补偿区B中的这两个像素进行插黑处理。
在设定动态参数X＝18.75％时，每个边缘像素对应的补偿区中包括的像素数量＝16*18.75％＝3，对于图6b中标记
Figure PCTCN2021121815-appb-000004
的边缘像素，其补偿区所在区域标记为C。在亮度补偿能级数量为5或6的情况下，由于补偿区C的像素数量小于亮度补偿能级数量，可以直接对补偿区C中的这两个像素进行插黑处理。
插黑处理可以理解为将该像素的灰阶调整为L0灰阶。
其它边缘像素的补偿区的确定方式与这个边缘像素类似，所有的边缘像素对应的补偿区共同构成一个缓冲区，该缓冲区中的像素围绕画面像素设置。
需要说明的是，在本申请的实施例中，对于补偿区中的像素排布方式或补偿子区中的像素排布方式不做进一步限定，具体根据实际情况确定。
在本申请的一些实施例中，步骤S906、确定补偿区的补偿参数包括：
S9061、确定补偿区的像素数量；
S9062、在补偿区的像素数量小于亮度补偿层级的数量的情况下，补偿区的补偿参数确定为零灰阶。
示例性的，若补偿区的像素数量为5个，亮度补偿层级的数量为6个，则将补偿区中的各像素的补偿参数均设定为零灰阶(L0)；若补偿区的像素数量为4个，亮度补偿层级的数量为5个，则将补偿区中的各像素的补偿参数均设定为零灰阶(L0)。
在进行亮度补偿或者亮度调节时，根据不同的亮度调节幅度将亮度调节过程分为多个亮度补偿层级；不同的亮度补偿层级，亮度调节的程度不同。
亮度补偿能级的数量越多，说明对补偿区中各像素的亮度调节过程越细腻，进行亮度调节之后的显示画面画质越好。在实际应用中，亮度 补偿能级的数量与补偿区包括的像素数量相关，具体可以根据实际情况进行调节，这里不做限定。
另外，亮度补偿能级的数量与画质引擎处理精度相关。
例如：对于SDR(Standard Dynamic Range，普通动态范围)技术的显示装置，画质引擎处理精度为8bits，其画面的灰阶包括2 8＝256个层次，即包括L0、L1、L2、L3…...L254和L255，亮度补偿能级的数量最多可以包括256个。
对于HDR(High-Dynamic Range，高动态范围)技术的显示装置，画质引擎处理精度为10bits，其画面的灰阶包括2 10＝1024个层次，即包括L0、L1、L2、L3…...L1022和L1023，亮度补偿能级的数量最多可以包括1024个。
需要说明的是，HDR(High-Dynamic Range，高动态范围)技术是相对与SDR(Standard Dynamic Range，普通动态范围)技术而言的，对于SDR技术的显示装置，其显示装置的亮度范围为200-300nits，对比度由于显示模式的不同大概从500:1到4000:1，内部画质引擎处理精度8bits。然而，对于HDR1000技术的显示装置(HDR1000技术为HDR技术的一种类型)，其显示装置的亮度要求为：百分之十中央白色画面要求亮度≥1000nits，边角黑态亮度≤0.05nits；内部画质引擎处理精度10bits。
在本申请的一些实施例中，步骤S906、确定补偿区的补偿参数包括：
步骤S9063、确定补偿区的像素数量；
步骤S9064、在补偿区的像素数量大于或者等于亮度补偿层级的数量的情况下，将补偿区划分为多个补偿子区；补偿子区的数量和亮度补偿层级的数量相同；
其中，同一补偿子区中的像素对应同一个亮度补偿层级，同一个亮度补偿层级中的补偿参数相同，且各亮度补偿层级中的补偿参数大于或等于零灰阶、小于边缘像素的像素灰阶。
在本申请的一些实施例中，各补偿子区的补偿参数沿第一方向逐渐减小，第一方向为画面像素所在的区域指向补偿区的方向。
示例性的，可以将补偿区分为3个、4个、5个、6个或更多补偿子区，补偿子区的数量和亮度补偿层级的数量相同。
可以理解，每个补偿区划分的补偿子区的数量越多，对亮度的调节过程越细腻，进行亮度调节之后像素区域中显示的画面的画质越好。
示例性的，对于HDR技术的显示装置，由于其内部画质引擎处理精度10bits，其画面的灰阶包括210＝1024个层次，即包括L0、L1、L2、L3…...L1022和L1023灰阶，亮度补偿能级的数量最多可以包括1024个，表1中提供一种亮度补偿层级数量为6的补偿参数表。
表1：第一种亮度补偿层级的补偿参数表
Figure PCTCN2021121815-appb-000005
在一个边缘像素对应的补偿区的像素数量为27个的情况下，由于亮度补偿层级数量为6，将补偿区划分为6个补偿子区，27÷6＝4(余3)，则：
第一补偿子区包括4个像素，对应的亮度补偿能级为5，对应的补偿参数为L900；
第二补偿子区包括4个像素，对应的亮度补偿能级为4，对应的补偿参数为L700；
第三补偿子区包括4个像素，对应的亮度补偿能级为3，对应的补偿参数为L500；
第四补偿子区包括4个像素，对应的亮度补偿能级为2，对应的补偿参数为L300；
第五补偿子区包括4个像素，对应的亮度补偿能级为1，对应的补偿参数为L100；
第六补偿子区包括4+3(余数)个像素，对应的亮度补偿能级为0，对应的补偿参数为L0。
需要说明的是，最低亮度补偿能级(Rank 0)对应的灰阶为L0灰阶，最高亮度补偿能级(Rank 5)对应的灰阶小于边缘像素的像素灰阶，其它亮度补偿能级对应的灰阶位于这两个灰阶之间，可以根据实际情况 进行调节。
示例性的，对于SDR技术的显示装置，由于其内部画质引擎处理精度8bits，其画面的灰阶包括28＝256个层次，即包括L0、L1、L2、L3…...L254和L255灰阶，亮度补偿能级的数量最多可以包括256个，表2中提供一种亮度补偿层级数量为5的补偿参数表。
表2：第二种亮度补偿层级中的补偿参数表
Figure PCTCN2021121815-appb-000006
在一个边缘像素对应的补偿区的像素数量为27个的情况下，将补偿区划分为5个补偿子区，27÷5＝5(余2)，则：
第一补偿子区包括5个像素，对应的亮度补偿能级为4，对应的补偿参数为L200；
第二补偿子区包括3个像素，对应的亮度补偿能级为3，对应的补偿参数为L150；
第三补偿子区包括5个像素，对应的亮度补偿能级为2，对应的补偿参数为L100；
第四补偿子区包括5个像素，对应的亮度补偿能级为1，对应的补偿参数为L50；
第五补偿子区包括5+2(余数)个像素，对应的亮度补偿能级为0，对应的补偿参数为L0。
需要说明的是，最低亮度补偿能级(Rank 0)对应的灰阶为L0灰阶，最高亮度补偿能级(Rank 4)对应的灰阶小于边缘像素的像素灰阶，其它亮度补偿能级对应的灰阶位于这两个灰阶之间，可以根据实际情况进行调节。
另外，需要强调说明的是，在补偿区的像素数量小于亮度补偿层级的数量的情况下，补偿区的补偿参数确定为零灰阶，也即此时，对补偿区的所有像素进行插黑处理。在补偿区的像素数量大于或者等于亮度补偿层级的数量的情况下，对多个补偿子区中，对亮度补偿能级为0对应 的补偿子区中的所有像素进行插黑处理(L0灰阶)，且随着亮度补偿能级逐渐减小(灰阶值减小)，对应的补偿子区距离画面像素所在区域的距离越远；对亮度补偿能级最大的补偿子区中的所有像素，其补偿参数对应的灰阶值小于边缘像素的灰阶值。
在实际应用中，由于HDR显示装置对亮度及画质的要求更高，通常在对HDR显示装置中的背光源进行亮度调节时，可以将每个补偿区划分为更多数量的补偿子区，从而可以针对每个补偿子区的亮度分别进行调节，以满足HDR显示装置更高的画质要求。
示例性的，参考图6b所示，在补偿区的像素数量大于或者等于亮度补偿层级的数量的情况下，各补偿子区对应的亮度补偿能级沿图6b所示的箭头方向逐渐减小(灰阶值减小)。
在实际应用中，每一个边缘像素对应的补偿区中包括至少一个补偿子区，每个补偿子区包括至少一个像素，各补偿子区中的像素的具体排布方式可以结合实际补偿区包括的像素数量情况和光晕的严重情况而定，这里不做限定。
本申请的实施例提供的亮度调节方法，能够根据处于点亮状态的灯区，确定出补偿区，在补偿区的像素数量小于亮度补偿能级的数量的情况下，直接对补偿区的所有像素进行插黑处理，在补偿区的像素数量大于或等于亮度补偿能级的数量的情况下，将补偿区分为多个补偿子区，并分别对各补偿子区的像素进行不同程度的亮度调节，从而能够进一步减轻光晕现象，提高显示装置的显示效果，提高画质。
本申请的实施例提供了一种亮度调节系统，参考图7a所示，包括：电连接的控制器400和背光模组500；
背光模组400被配置为在控制器500的控制下提供背光源；
其中，控制器400包括分区调光单元402和控制单元401；控制单元401和分区调光单元402电连接，分区调光单元402和背光模组500电连接；
分区调光单元402被配置为在接收到控制单元401发出的分区控制信号的情况下，根据分区控制信号将背光源分为多个灯区；
控制单元401被配置为获取并存储每个灯区对应的像素区域的像素数量和各像素的像素灰阶值；根据像素数量和各像素灰阶值确定灯区的亮度参数；发出分区控制信号和调光信号；
分区调光单元402还被配置为在接收到调光信号后，获取亮度参数，并根据亮度参数，对灯区的亮度进行调节。
在本申请的实施例中，控制器400可以是时序控制器(TCON)，分区调光单元402可以是分区调光控制器(LDC，Local dimming controller)，控制单元401可以是多点控制设备(MCU，Microcontroller Unit)。
在本申请的实施例中，上述背光模组可以为Mini LED类型的背光模组，或者，也可以是Micro LED类型的背光模组，具体根据实际情况确定，这里不进行限定。
在本申请的实施例中，该系统还包括PC母板或者视频采集卡(Graphics Cards)700，PC母板或者视频采集卡700与控制器400之间可以通过EDP接口连接，以将视频流信号传输至控制器400中，通过控制器400中的各个模块对视频流信号进行逻辑运算，将得到的亮度信号通过SPI接口传输给背光模组500，从而控制背光模组的背光源的亮度，在实际应用中，控制器400通过LED驱动器与背光模组500之间电连接。
需要说明的是，EDP接口是一种基于DisplayPort架构和协议的一种全数字化接口，可以用较简单的连接器以及较少的引脚来传递高分辨率信号，且能够实现多数据同时传输。SPI(Serial Peripheral Interface-串行外设接口)是一种同步串行外设接口，它可以使MCU与各种外围设备以串行方式进行通信以交换信息。
在本申请的实施例中，通过上述调节系统，可以获取每个灯区对应的像素区域中的像素数量和像素灰阶值，根据像素数量和像素灰阶值确定出亮度参数，根据亮度参数对灯区进行亮度调节，由于该亮度调节过程中，每一个灯区对应一个亮度参数，从而可以根据不同区域光晕现象的严重程度，对各灯区分别进行调节，在减轻光晕现象的同时，进行亮度调节的针对性更强，亮度调节的效果更好。
在本申请的一些实施例中，分区调光单元402包括分区子单元和调光子单元；
分区子单元被配置为根据分区控制信号将背光源分为多个灯区；
调光子单元被配置为获取亮度参数，对于点亮状态的灯区，更新其亮度值；更新后的亮度值等于亮度参数；对于熄灭状态的灯区，保持熄 灭状态。
在本申请的一些实施例中，控制单元401包括存储子单元、获取子单元和运算子单元；
获取子单元被配置为获取每个灯区对应的像素区域的像素数量和各像素的像素灰阶值；
存储子单元被配置为存储分区控制信号、调光信号、灯区对应的像素区域的像素数量和各像素的像素灰阶值、亮度参数；发出分区控制信号和调光信号；
运算子单元被配置为根据像素数量和多个像素灰阶值，对每个灯区对应的多个像素灰阶值求平均值，将每个灯区对应的多个像素灰阶值的平均值作为各灯区的亮度参数。
在本申请的一些实施例中，参考图7b所示，该系统还包括显示面板600，显示面板600位于背光模组500的出光侧，显示面板600和控制单元401电连接；控制器400还包括色彩补偿单元403，色彩补偿单元403和控制单元401电连接；
色彩补偿单元403被配置为根据处于点亮状态的各灯区，确定显示面板的补偿区；确定补偿区的补偿参数；
控制单元401还被配置为根据补偿参数对补偿区进行亮度调节。
其中，色彩补偿单元403可以为色彩补偿器(ACC，Accurate Color Capture)，又称作色度调整器(ACC，Adjust Chromaticity Coordinate)。
在实际应用中，还可以通过色彩补偿单元403调整像素区域中像素包括的各子像素的亮度，具体的，一个像素包括红色子像素、绿色子像素和蓝色子像素时，可以通过调整红色子像素、绿色子像素和蓝色子像素的亮度比例，来调整显示面板整体的画面颜色。
在本申请的实施例中，通过控制器400中的各个模块对视频流信号进行亮度调节相关的逻辑运算之后，将得到的亮度调节信号通过SPI接口传输给背光模组500。具体的，PC母板或者视频采集卡700与控制器400之间可以通过EDP接口连接，以将视频流信号传输至控制器400中，通过控制器400中的各个模块对视频流信号进行逻辑运算，将运算得到的亮度调节信号通过SPI接口传输给显示面板600，从而控制显示面板中的补偿区的各像素的灰阶值，在实际应用中，通过控制器400中的各个模块可以对视频流信号进行逻辑运算并分别将相应的信号通过 SPI接口传输给背光模组500和显示面板600，以调节背光源的亮度的同时，调节显示面板中的补偿区的各像素的灰阶值，从而在其共同作用下，减轻光晕现象，改善显示装置的显示效果。
在本申请的一些实施例中，色彩补偿单元403包括第一确定子单元和第二确定子单元；
第一确定子单元被配置为确定处于点亮状态的各灯区对应的显示面板中的显示画面；根据显示画面中的画面像素确定边缘像素；确定画面像素的数量；根据画面像素的数量确定各边缘像素的补偿区；其中，补偿区为与点亮状态的灯区对应的像素中除画面像素之外的部分其它像素所在的区域；
第二确定子单元被配置为确定补偿区的像素数量；在补偿区的像素数量小于亮度补偿层级的数量的情况下，补偿区的补偿参数确定为零灰阶；在补偿区的像素数量大于或者等于亮度补偿层级的数量的情况下，将补偿区划分为多个补偿子区，且补偿子区的数量和亮度补偿层级的数量相同；
其中，同一补偿子区中的像素对应同一个亮度补偿层级，同一个亮度补偿层级中的补偿参数相同，且各亮度补偿层级中的补偿参数大于或等于零灰阶、小于边缘像素的像素灰阶。
在本申请的一些实施例中，各补偿子区的补偿参数沿第一方向逐渐减小，第一方向为画面像素所在的区域指向补偿区的方向。
需要说明的是，该调节系统进行亮度调节的过程可以参考亮度调节方法的实施例，重复之处不再赘述。
本申请的实施例提供了一种显示装置，包括如上所述的调节系统。
该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。对于该显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本发明的限制。该显示装置进行亮度调节的过程可以参考上述对调节系统的具体说明或者参考亮度调节方法的实施例，重复之处不再赘述。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本 申请的保护范围应以所述权利要求的保护范围为准。

Claims (15)

  1. 一种亮度调节方法，其中，应用于显示装置，所述显示装置包括背光模组，所述调节方法包括：
    将所述背光模组的背光源分为多个灯区；
    获取每个所述灯区对应的像素区域中的像素数量和各像素的像素灰阶值；
    根据所述像素数量和各所述像素灰阶值确定所述灯区的亮度参数；
    根据所述亮度参数，对所述灯区的亮度进行调节。
  2. 根据权利要求1所述的调节方法，其中，所述根据所述亮度参数，对所述灯区的亮度进行调节包括：
    对于点亮状态的所述灯区，更新其亮度值；更新后的亮度值等于所述亮度参数；
    对于熄灭状态的所述灯区，保持熄灭状态。
  3. 根据权利要求1所述的调节方法，其中，所述根据所述像素数量和各所述像素灰阶值确定各所述灯区的亮度参数包括：
    根据所述像素数量和各所述像素灰阶值，对每个所述灯区对应的各所述像素灰阶值求平均值；
    将每个所述灯区对应的各所述像素灰阶值的平均值作为所述灯区的亮度参数。
  4. 根据权利要求1-3任一项所述的调节方法，其中，所述显示装置还包括显示面板，所述显示面板位于所述背光模组的出光侧；所述根据所述亮度参数，对所述灯区的亮度进行调节之后，所述方法还包括：
    根据处于点亮状态的各所述灯区，确定所述显示面板的补偿区；
    确定所述补偿区的补偿参数；
    根据所述补偿参数对所述补偿区进行亮度调节。
  5. 根据权利要求4所述的调节方法，其中，所述根据处于点亮状态的各所述灯区，确定补偿区包括：
    确定处于点亮状态的各所述灯区对应的所述显示面板中的显示画面；
    根据所述显示画面中的画面像素确定边缘像素；
    确定所述画面像素的数量；
    根据所述画面像素的数量确定各所述边缘像素的所述补偿区；其中， 所述补偿区为与点亮状态的所述灯区对应的像素中除所述画面像素之外的部分其它像素所在的区域。
  6. 根据权利要求4所述的调节方法，其中，所述确定所述补偿区的补偿参数包括：
    确定所述补偿区的像素数量；
    在所述补偿区的像素数量小于亮度补偿层级的数量的情况下，所述补偿区的补偿参数确定为零灰阶。
  7. 根据权利要求4所述的调节方法，其中，所述确定所述补偿区的补偿参数包括：
    确定所述补偿区的像素数量；
    在所述补偿区的像素数量大于或者等于所述亮度补偿层级的数量的情况下，将所述补偿区划分为多个补偿子区；所述补偿子区的数量和所述亮度补偿层级的数量相同；
    其中，同一所述补偿子区中的像素对应同一个所述亮度补偿层级，同一个所述亮度补偿层级中的所述补偿参数相同，且各所述亮度补偿层级中的所述补偿参数大于或等于零灰阶、小于所述边缘像素的像素灰阶。
  8. 根据权利要求7所述的调节方法，其中，各所述补偿子区的补偿参数沿第一方向逐渐减小，所述第一方向为所述画面像素所在的区域指向所述补偿区的方向。
  9. 一种亮度调节系统，其中，包括：电连接的控制器和背光模组；
    所述背光模组被配置为在所述控制器的控制下提供背光源；
    其中，所述控制器包括分区调光单元和控制单元；所述控制单元和所述分区调光单元电连接，所述分区调光单元和所述背光模组电连接；
    所述分区调光单元被配置为在接收到所述控制单元发出的分区控制信号的情况下，根据所述分区控制信号将所述背光源分为多个灯区；
    所述控制单元被配置为获取并存储每个所述灯区对应的像素区域中的像素数量和各像素的像素灰阶值；根据所述像素数量和各所述像素灰阶值确定所述灯区的亮度参数；发出所述分区控制信号和调光信号；
    所述分区调光单元还被配置为在接收到所述调光信号后，获取所述亮度参数，并根据所述亮度参数，对所述灯区的亮度进行调节。
  10. 根据权利要求9所述的系统，其中，所述分区调光单元包括分区子单元和调光子单元；
    所述分区子单元被配置为根据所述分区控制信号将所述背光源分为多个灯区；
    所述调光子单元被配置为获取所述亮度参数，对于点亮状态的所述灯区，更新其亮度值；更新后的亮度值等于所述亮度参数；对于熄灭状态的所述灯区，保持熄灭状态。
  11. 根据权利要求9所述的系统，其中，所述控制单元包括存储子单元、获取子单元和运算子单元；
    所述获取子单元被配置为获取每个所述灯区对应的像素区域中的像素数量和各像素的像素灰阶值；
    所述存储子单元被配置为存储所述分区控制信号、所述调光信号、所述灯区对应的像素区域的像素数量和各所述像素的像素灰阶值、所述亮度参数；发出所述分区控制信号和所述调光信号；
    所述运算子单元被配置为根据所述像素数量和各所述像素灰阶值，对每个所述灯区对应的各所述像素灰阶值求平均值，将每个所述灯区对应的各所述像素灰阶值的平均值作为所述灯区的亮度参数。
  12. 根据权利要求9-11任一项所述的系统，其中，所述系统还包括显示面板，所述显示面板位于所述背光模组的出光侧，所述显示面板和所述控制单元电连接；所述控制器还包括色彩补偿单元，所述色彩补偿单元和所述控制单元电连接；
    所述色彩补偿单元被配置为根据处于点亮状态的各所述灯区，确定所述显示面板的补偿区；确定所述补偿区的补偿参数；
    所述控制单元还被配置为根据所述补偿参数对所述补偿区进行亮度调节。
  13. 根据权利要求12所述的系统，其中，所述色彩补偿单元包括第一确定子单元和第二确定子单元；
    所述第一确定子单元被配置为确定处于点亮状态的各所述灯区对应的所述显示面板中的显示画面；根据所述显示画面中的画面像素确定边缘像素；确定所述画面像素的数量；根据所述画面像素的数量确定各所述边缘像素的所述补偿区；其中，所述补偿区为与点亮状态的所述灯区对应的像素中除所述画面像素之外的部分其它像素所在的区域；
    所述第二确定子单元被配置为确定所述补偿区的像素数量；在所述补偿区的像素数量小于亮度补偿层级的数量的情况下，所述补偿区的补 偿参数确定为零灰阶；在所述补偿区的像素数量大于或者等于所述亮度补偿层级的数量的情况下，将所述补偿区划分为多个补偿子区，且所述补偿子区的数量和所述亮度补偿层级的数量相同；
    其中，同一所述补偿子区中的像素对应同一个所述亮度补偿层级，同一个所述亮度补偿层级中的所述补偿参数相同，且各所述亮度补偿层级中的所述补偿参数大于或等于零灰阶、小于所述边缘像素的像素灰阶。
  14. 根据权利要求13所述的系统，其中，各所述补偿子区的补偿参数沿第一方向逐渐减小，所述第一方向为所述画面像素所在的区域指向所述补偿区的方向。
  15. 一种显示装置，其中，包括如权利要求9-14任一项所述的调节系统。
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