WO2022121399A1 - 补偿灰阶确定方法、装置及设备 - Google Patents

补偿灰阶确定方法、装置及设备 Download PDF

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Publication number
WO2022121399A1
WO2022121399A1 PCT/CN2021/117114 CN2021117114W WO2022121399A1 WO 2022121399 A1 WO2022121399 A1 WO 2022121399A1 CN 2021117114 W CN2021117114 W CN 2021117114W WO 2022121399 A1 WO2022121399 A1 WO 2022121399A1
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sub
display areas
reference sub
target
display
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PCT/CN2021/117114
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English (en)
French (fr)
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任春辉
周小康
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昆山工研院新型平板显示技术中心有限公司
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Publication of WO2022121399A1 publication Critical patent/WO2022121399A1/zh
Priority to US18/297,252 priority Critical patent/US11922851B2/en

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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
    • G09G3/2003—Display of colours
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • 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
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of display technology, and in particular, to a compensation gray level determination method, a compensation gray level determination device, and a compensation gray level determination device.
  • the Mura phenomenon may appear on the display panel during the display process, which reduces the display effect of the display panel.
  • Demura compensation can be performed on the display panel.
  • a brightness acquisition device can be used to collect the brightness data of the display panel.
  • the brightness data collected by the brightness acquisition device is not accurate enough.
  • the display panel still has the problem of color cast.
  • Embodiments of the present application provide a method, device, and device for determining a compensating gray level, which can improve the color cast problem of a display panel.
  • an embodiment of the present application provides a compensation gray scale determination method, which includes: dividing a display area of a display panel into a plurality of sub-display areas distributed in an array; and selecting at least two sub-display areas from the plurality of sub-display areas as reference sub-display areas, wherein each reference sub-display area is adjacent and one of the reference sub-display areas includes the target sub-pixel to be compensated; according to the distance between the center point of the target sub-pixel and the center point of each reference sub-display area and The distance between the center points of adjacent reference sub-display areas determines the weight coefficient of each reference sub-display area; the weight coefficient of each reference sub-display area and the average brightness of each reference sub-display area under the target grayscale value are weighted The summation is performed to obtain the target luminance value of the target sub-pixel under the target gray-scale value; according to the target luminance value, the compensated gray-scale value of the target sub-pixel under the target gray-scale value is
  • an apparatus for determining a compensated gray scale which includes:
  • an area division module for dividing the display area of the display panel into a plurality of sub-display areas distributed in an array
  • a reference area determination module configured to select at least two sub-display areas from a plurality of sub-display areas as reference sub-display areas, wherein each reference sub-display area is adjacent and one of the reference sub-display areas includes the target sub-pixel to be compensated;
  • the weight determination module is used to determine the weight coefficient of each reference sub-display area according to the distance between the center point of the target sub-pixel and the center point of each reference sub-display area and the distance between the center points of the adjacent reference sub-display areas ;
  • the target brightness determination module is used to perform weighted summation on the weight coefficient of each reference sub-display area and the brightness mean value of each reference sub-display area under the target gray-scale value, to obtain the target brightness value of the target sub-pixel under the target gray-scale value ;
  • the compensation grayscale determination module is used for determining the compensated grayscale value of the target sub-pixel under the target grayscale value according to the target luminance value.
  • an embodiment of the present application provides a device for determining compensation gray scales, the device includes: a processor and a memory storing computer program instructions;
  • the processor executes the computer program instructions, the method for determining a compensated gray level according to the first aspect is implemented.
  • the target luminance value of the target sub-pixel to be compensated at the target grayscale value is determined according to the weight coefficient of the reference sub-display area and the weighted value of the average luminance value of the reference sub-display area, and each reference sub-display area
  • the regions are adjacent and one of the at least two reference sub-display regions includes the target sub-pixel, that is, each reference sub-display region is located around the target sub-pixel, and uses the center point of the target sub-pixel and each reference sub-display region.
  • the distance between the center points and the distance between the center points of the adjacent reference sub-display areas determine the weight coefficient of each reference sub-display area, and avoid using the brightness data collected by the brightness acquisition device to determine the brightness average value as the target brightness value, In this way, transition compensation is avoided for the sub-pixels on both sides of the same row, and the problem of color cast of the display panel is improved.
  • FIG. 1 shows a schematic diagram of luminance curves of sub-pixels of each color in a certain row of a display panel according to an embodiment of the present application
  • FIG. 2 shows a schematic flowchart of a method for determining a compensated gray level according to an embodiment of the present application
  • FIG. 3 shows a schematic diagram of selection of a reference sub-display area provided according to an embodiment of the present application
  • FIG. 4 shows a schematic diagram of selection of a reference sub-display area provided according to another embodiment of the present application.
  • FIG. 5 shows a schematic diagram of selection of a reference sub-display area provided according to another embodiment of the present application.
  • FIG. 6 shows a schematic structural diagram of an apparatus for determining a compensated gray scale provided according to an embodiment of the present application
  • FIG. 7 shows a schematic structural diagram of a device for determining a compensated gray scale provided according to another embodiment of the present application.
  • FIG. 8 shows a schematic structural diagram of a device for determining a compensated gray level according to an embodiment of the present application.
  • FIG. 1 shows a schematic diagram of luminance curves of sub-pixels of each color in a row of a display panel provided by an embodiment of the present application.
  • the display panel includes red sub-pixels, green sub-pixels and blue sub-pixels.
  • FIG. 1 shows the luminance data of the red sub-pixels, the green sub-pixels and the blue sub-pixels in the middle row of the display panel collected by the luminance collection device at 224 gray scales.
  • the brightness data of the red sub-pixel and blue sub-pixel collected by the brightness acquisition device has an obvious arc-shaped trend, that is, the brightness data on both sides of the row has an obvious arc trend.
  • the luminance value of the red subpixel is lower than the luminance value of the red subpixel in the middle of the row
  • the luminance value of the blue subpixel on both sides of the row is lower than the luminance value of the blue subpixel in the middle of the row
  • the luminance value of the green subpixel Data changes are relatively flat.
  • the luminance data of the red sub-pixels, green sub-pixels and blue sub-pixels in the same row are relatively flat, and there is no obvious arc trend of the red sub-pixels and blue sub-pixels shown in Figure 1.
  • the average brightness of the display panel is usually used as the target brightness value, so as to increase the brightness of the red sub-pixels and blue sub-pixels on both sides of the same row to the target brightness value.
  • the red sub-pixels and the blue sub-pixels cause an overcompensation phenomenon, while the brightness of the green sub-pixels does not change much, resulting in a color cast of the compensated display panel, for example, causing purple on both sides of the compensated display panel.
  • the embodiments of the present application provide a compensation gray level determination method, a compensation gray level determination device, a compensation gray level determination device, and a computer storage medium. Various embodiments of the determination device and the compensation gray scale determination device will be described.
  • An embodiment of the present application provides a method for determining a compensated gray scale, which is used for determining a compensated gray scale value of a display panel, and the display panel may be an organic light emitting diode (Organic Light Emitting Diode, OLED) display panel.
  • OLED Organic Light Emitting Diode
  • FIG. 2 shows a schematic flowchart of a method for determining a compensated gray level according to an embodiment of the present application.
  • the compensation gray scale determination method provided by the embodiment of the present application includes steps 110 to 150 .
  • Step 110 Divide the display area of the display panel into a plurality of sub-display areas distributed in an array.
  • Step 120 at least two sub-display areas are selected from the plurality of sub-display areas as reference sub-display areas, wherein each reference sub-display area is adjacent and one of the reference sub-display areas includes the target sub-pixel to be compensated.
  • Step 130 Determine the weight coefficient of each reference sub-display area according to the distance between the center point of the target sub-pixel and the center point of each reference sub-display area and the distance between the center points of adjacent reference sub-display areas.
  • Step 140 weighting and summing the weight coefficients of each reference sub-display area and the luminance mean value of each reference sub-display area at the target grayscale value to obtain the target luminance value of the target subpixel at the target grayscale value.
  • Step 150 Determine, according to the target luminance value, the compensated grayscale value of the target sub-pixel under the target grayscale value.
  • the target luminance value of the target sub-pixel to be compensated at the target grayscale value is determined according to the weight coefficient of the reference sub-display area and the weighted value of the average luminance value of the reference sub-display area, and each reference sub-display area
  • the regions are adjacent and one of the at least two reference sub-display regions includes the target sub-pixel, that is, each reference sub-display region is located around the target sub-pixel, and uses the center point of the target sub-pixel and each reference sub-display region.
  • the distance between the center points and the distance between the center points of the adjacent reference sub-display areas determine the weight coefficient of each reference sub-display area, and avoid using the brightness data collected by the brightness acquisition device to determine the brightness average value as the target brightness value, In this way, transition compensation is avoided for the sub-pixels on both sides of the same row, and the problem of color cast of the display panel is improved.
  • the shape of the sub-display area may be a regular polygon, for example, a rectangle, a regular pentagon, a regular hexagon, and the like.
  • the shape of each sub-display area may be a rectangular area, and the length and width of each sub-display area are equal.
  • step 110 may specifically include: dividing the display area of the display panel into sub-display areas of m rows and n columns distributed in an array.
  • m and n are both positive integers greater than or equal to 2.
  • the values of m and n may be set from small to large until the display panel has no color cast under the values of m and n, thereby reducing the amount of calculation.
  • the distance between the center point of the target sub-pixel and the center point of each of the reference sub-display areas may be the distance between the center point of the target sub-pixel and the center point of each of the reference sub-display areas.
  • the distance between the center points of adjacent reference sub-display areas may be the distance between the center points of adjacent reference sub-display areas in at least one of the row direction and the column direction.
  • Step 120 may specifically include: selecting four sub-display areas in two rows and two columns from the plurality of sub-display areas as reference sub-display areas, and taking the four vertices of the first rectangular area as the center points of four sub-display areas as reference sub-display areas. display area.
  • the target sub-pixel is located in the non-edge area of the display panel.
  • four sub-display areas that are closer to the target sub-pixel can be selected as reference sub-display areas, so that the line direction can be taken into account when determining the target luminance value of the target sub-pixel. Influence in the up and column directions to ensure the accuracy of the determined target luminance values.
  • the target sub-pixel may be any sub-pixel in the display panel, and the positions of the reference sub-display areas corresponding to the target sub-pixels at different positions may be different.
  • the weight coefficient of each reference sub-display area can be calculated according to formula (1):
  • f represents the weight coefficient
  • h represents the distance in the row direction between the center point of the target sub-pixel and the center point of the reference sub-display area
  • H represents the distance in the row direction between the center points of the adjacent reference sub-display areas
  • v represents the distance in the column direction between the center point of the target sub-pixel and the center point of the reference sub-display area
  • V represents the distance in the column direction between the center points of the adjacent reference sub-display areas.
  • the reciprocal of the distance or the square of the inverse of the distance between the center point of the target sub-pixel and the center point of the reference sub-display area is not directly used as the weight coefficient, but the above formula (1 ), use the distance between the center point of the target sub-pixel and the center point of the reference sub-display area in the row direction and the column direction, and the center point of the adjacent reference sub-display area in the row direction and the column direction.
  • the influence degree in the row direction and the column direction can be considered separately, and the influence degree in the row direction and the influence degree in the column direction can be combined to obtain the final weight coefficient, so as to ensure the accuracy of the obtained weight coefficient. sex.
  • FIG. 3 shows a schematic diagram of selection of a reference sub-display area provided according to an embodiment of the present application.
  • the display panel 100 includes a display area AA and a non-display area NA.
  • FIG. 3 exemplarily shows that the display area AA of the display panel is divided into 6 rows and 8 columns of sub-display areas A1, wherein the 2 rows and 2 columns of sub-display areas are the first reference sub-display area A11 and the second reference sub-display area respectively.
  • the center points are O1, O2, O3 and O4 respectively, and the first rectangular area S1 is formed by taking O1, O2, O3 and O4 as four vertices.
  • the target sub-pixel PT is located in the first rectangular area S1.
  • weight coefficient of the first reference sub-display area A11 can be calculated according to the formula (1.1):
  • weight coefficient of the second reference sub-display area A12 can be calculated according to the formula (1.2):
  • weight coefficient of the third reference sub-display area A13 can be calculated according to the formula (1.3):
  • weight coefficient of the fourth reference sub-display area A14 can be calculated according to the formula (1.4):
  • f 1 represents the weight coefficient of the first reference sub-display area A11
  • h 1 represents the distance between the center point of the target sub-pixel PT and the center point O1 of the first reference sub-display area A11 in the row direction X
  • V 1 Indicates the distance in the column direction Y between the center point of the target sub-pixel PT and the center point O1 of the first reference sub-display area A11.
  • f 2 represents the weight coefficient of the second reference sub-display area A12
  • h 2 represents the distance in the row direction X between the center point of the target sub-pixel PT and the center point O2 of the second reference sub-display area A12
  • V 2 represents the target The distance in the column direction Y between the center point of the sub-pixel PT and the center point O2 of the second reference sub-display area A12.
  • f 3 represents the weight coefficient of the third reference sub-display area A13
  • h 3 represents the distance in the row direction X between the center point of the target sub-pixel PT and the center point O3 of the third reference sub-display area A13
  • V 3 represents the target The distance in the column direction Y between the center point of the sub-pixel PT and the center point O3 of the third reference sub-display area A13.
  • f 4 represents the weight coefficient of the fourth reference sub-display area A14
  • h 4 represents the distance in the row direction X between the center point of the target sub-pixel PT and the center point O4 of the fourth reference sub-display area A14
  • V 4 represents the target The distance in the column direction Y between the center point of the sub-pixel PT and the center point O4 of the fourth reference sub-display area A14.
  • the number of reference sub-display areas is still four, which are respectively the first reference sub-display area A11, the second reference sub-display area A12, the third reference sub-display area A13 and the fourth reference sub-display area A13.
  • the target luminance value of the target sub-pixel at the target grayscale value can be calculated according to formula (2):
  • L X represents the target brightness value
  • L 1 represents the brightness mean value of the first reference sub-display area
  • f 1 represents the weight coefficient of the first reference sub-display area
  • L 2 represents the brightness mean value of the second reference sub-display area
  • f 2 represents the weight coefficient of the second reference sub-display area
  • L 3 represents the brightness mean value of the third reference sub-display area
  • f 3 represents the weight coefficient of the third reference sub-display area
  • L 4 represents the brightness mean value of the fourth reference sub-display area
  • f4 represents the weighting coefficient of the fourth reference sub-display area.
  • the influence caused by the inaccuracy of the brightness acquisition device can be reduced, and in the subsequent compensation process, the transition compensation of the sub-pixels on both sides of the same row can be avoided, improving the Display panel color cast problem.
  • the compensation grayscale determination method may further include: acquiring the luminance value of each subpixel in each reference subdisplay area under the target grayscale value; The luminance value under the target grayscale value determines the average luminance value of each reference sub-display area.
  • the luminance value of each sub-pixel in the reference sub-display area at the target grayscale value can be summed, and the ratio of the sum of each luminance value to the number of each sub-pixel can be calculated to obtain the average luminance value of each reference sub-display area.
  • luminance values with obvious deviations may be filtered out, and the ratio of the sum of the filtered luminance values to the number of filtered luminance values may be calculated to obtain the average luminance value of each reference sub-display area.
  • the target grayscale value may be any grayscale value that can be displayed by the display panel.
  • the grayscale range that the display panel can display is 0-255
  • the target grayscale value can be any value from 0-255.
  • the compensation gray level under some specified gray level binding points may be determined first, and then the compensation gray level corresponding to the gray level outside the gray level binding point may be determined by using a linear interpolation method.
  • the target grayscale value may be any one of 32 grayscales, 64 grayscales, 96 grayscales, 128 grayscales, 160 grayscales, 192 grayscales, 224 grayscales, and 255 grayscales.
  • an optical measurement device such as a color analyzer, or a high-resolution and high-precision camera such as a Charge Coupled Device (CCD) camera can be used to photograph the display panel , to generate luminance data.
  • the entire display area of the display panel may be photographed, that is, the photographed area includes the entire display area, and only the luminance data corresponding to the reference sub-display area may be used in the subsequent process. It is also possible to photograph only the reference sub-display area of the display panel, that is, the photographed area only includes the target display area.
  • each sub-display area is a rectangular area with equal length and width as an example, in some optional embodiments, the target sub-pixel is located on a line connecting the center points of two adjacent sub-display areas and parallel to the connecting line. within the second rectangular area formed by the edge of the display area.
  • Step 120 may specifically include: selecting two sub-display areas from the plurality of sub-display areas as reference sub-display areas, and two sub-display areas with two end points of the connecting line as center points as reference sub-display areas.
  • the target sub-pixel is located at the edge area of the display panel.
  • two sub-display areas with a short distance from the target sub-pixel can be selected as reference sub-display areas, so that only the distance from the target sub-pixel is considered when determining the target luminance value of the target sub-pixel.
  • the influence of the two sub-display areas with the target sub-pixels close to each other is to ensure the accuracy of the determined target brightness value.
  • FIG. 4 shows a schematic diagram of selection of a reference sub-display area provided according to an embodiment of the present application.
  • the display panel 100 includes a display area AA and a non-display area NA.
  • FIG. 4 exemplarily shows that the display area AA of the display panel is divided into 7 rows and 9 columns of sub-display areas A1, wherein the two sub-display areas in 1 row and 2 columns are two reference sub-display areas A11', A12' , the center points of the two reference sub-display areas A11', A12' are O1', O2' respectively, the connecting line between the two center points O1', O2' and the edge of the display area parallel to the connecting line form a second rectangle Area S2.
  • the target sub-pixel PT is located in the second rectangular area S2.
  • the two reference sub-display areas A11', A12' are distributed in 1 row and 2 columns, that is to say, the distance between the center points of the two reference sub-display areas A11', A12' in the column direction Y is zero.
  • the weight of each reference sub-display area can be calculated according to formula (3) coefficient:
  • f' represents the weight coefficient
  • h' represents the distance between the center point of the target sub-pixel and the center point of the reference sub-display area in the row direction X
  • H represents the distance between the center points of the adjacent reference sub-display areas in the row direction Distance in direction X.
  • h 1 ' represents the distance in the row direction X between the center point of the target sub-pixel and the center point O1' of the reference sub-display area A11'
  • h 2 ' represents the center point of the target sub-pixel and the reference sub-display area A12 'The distance between the center points O1' in the row direction X.
  • the target luminance value of the target sub-pixel under the target grayscale value can be calculated according to formula (2.1):
  • L X represents the target brightness value
  • L 1 ' represents the average brightness value of the reference sub-display area A11'
  • f 1 ' represents the weight coefficient of the reference sub-display area A11'
  • L 2 ' represents the average brightness value of the reference sub-display area A12'
  • f 2 ′ represents the weight coefficient of the reference sub-display area A12 ′.
  • FIG. 5 shows a schematic diagram of selection of a reference sub-display area provided according to an embodiment of the present application.
  • the display panel 100 includes a display area AA and a non-display area NA.
  • FIG. 5 exemplarily shows that the display area AA of the display panel is divided into 6 rows and 8 columns of sub-display areas A1, wherein the two sub-display areas in 2 rows and 1 column are the two reference sub-display areas A13', A14' , the center points of the two reference sub-display areas A13', A14' are O3', O4' respectively, the connecting line between the two center points O3', O4' and the edge of the display area parallel to the connecting line form a second rectangle Area S2.
  • the target sub-pixel PT is located in the second rectangular area S2.
  • the two reference sub-display areas A13', A14' are distributed in 2 rows and 1 column, that is, the distance between the center points of the two reference sub-display areas A13', A14' in the row direction X is zero.
  • the weight coefficient of each reference sub-display area is calculated according to formula (4):
  • f' represents the weight coefficient
  • v' represents the distance in the column direction Y between the center point of the target sub-pixel and the center point of the reference sub-display area
  • V represents the distance between the center points of the adjacent reference sub-display areas in the column direction Distance in direction Y.
  • v 3 ′ represents the distance in the column direction Y between the center point of the target sub-pixel and the center point O3 ′ of the reference sub-display area A13 ′
  • v 4 ′ represents the center point of the target sub-pixel and the reference sub-display area A14 'The distance between the center points O4' in the column direction Y.
  • the target luminance value of the target sub-pixel under the target grayscale value can be calculated according to formula (2.2):
  • L X represents the target brightness value
  • L 3 ' represents the average brightness value of the reference sub-display area A13'
  • f 3 ' represents the weight coefficient of the reference sub-display area A13'
  • L 4 ' represents the average brightness value of the reference sub-display area A14'
  • f 4 ′ represents the weight coefficient of the reference sub-display area A14 ′.
  • the compensated grayscale value of the target sub-pixel under the target grayscale value can be calculated according to formula (5):
  • Nx represents the compensated grayscale value
  • N represents the target grayscale value
  • L X represents the target brightness value
  • L N represents the actual brightness value of the target sub-pixel at the target grayscale value
  • Gamma represents the gamma value of the display panel.
  • the required compensation grayscale value can be obtained accurately.
  • L N is the actual luminance value before sub-pixel compensation.
  • FIG. 6 shows a schematic structural diagram of an apparatus for determining a compensated gray level according to an embodiment of the present application.
  • the compensation gray scale determination device 600 provided by the embodiment of the present application includes a region division module 601 , a reference region determination module 602 , a weight determination module 603 , a target brightness determination module 604 , and a compensation gray scale determination module 605 .
  • the area dividing module 601 is used for dividing the display area of the display panel into a plurality of sub-display areas distributed in an array;
  • a reference area determination module 602 configured to select at least two sub-display areas from the plurality of sub-display areas as reference sub-display areas, wherein each reference sub-display area is adjacent and one of the reference sub-display areas includes the target sub-pixel to be compensated;
  • the weight determination module 603 is used to determine the weight of each reference sub-display area according to the distance between the center point of the target sub-pixel and the center point of each reference sub-display area and the distance between the center points of the adjacent reference sub-display areas coefficient;
  • the target brightness determination module 604 is configured to perform weighted summation on the weight coefficient of each reference sub-display area and the brightness mean value of each reference sub-display area under the target gray-scale value to obtain the target brightness of the target sub-pixel under the target gray-scale value value;
  • the compensation grayscale determination module 605 is configured to determine the compensated grayscale value of the target sub-pixel under the target grayscale value according to the target luminance value.
  • the target luminance value of the target sub-pixel to be compensated at the target grayscale value is determined according to the weight coefficient of the reference sub-display area and the weighted value of the average luminance value of the reference sub-display area, and each reference sub-display area
  • the regions are adjacent and one of the at least two reference sub-display regions includes the target sub-pixel, that is, each reference sub-display region is located around the target sub-pixel, and uses the center point of the target sub-pixel and each reference sub-display region.
  • the distance between the center points and the distance between the center points of the adjacent reference sub-display areas determine the weight coefficient of each reference sub-display area, and avoid using the brightness data collected by the brightness acquisition device to determine the brightness average value as the target brightness value, In this way, transition compensation is avoided for the sub-pixels on both sides of the same row, and the problem of color cast of the display panel is improved.
  • each sub-display area is a rectangular area with equal length and width.
  • the target sub-pixel is located in a first rectangular area formed with the center points of the four sub-display areas in two rows and two columns as vertices, and the reference area determination module 602 is specifically configured to:
  • sub-display areas are selected from the plurality of sub-display areas as reference sub-display areas, and four sub-display areas with four vertices of the first rectangular area as center points are used as reference sub-display areas.
  • the weight determination module 603 is specifically configured to:
  • the weight coefficient of each reference sub-display area is calculated according to the above formula (1).
  • the four reference sub-display areas include a first reference sub-display area, a second reference sub-display area, a third reference sub-display area, and a fourth reference sub-display area.
  • the target luminance value is calculated according to the above formula (2).
  • the target sub-pixel is located in a second rectangular area formed by a line connecting the center points of two adjacent sub-display areas and an edge of the display area parallel to the connecting line.
  • Two sub-display areas are selected from the plurality of sub-display areas as reference sub-display areas, and the two sub-display areas with the two end points of the connecting line as the center points are the reference sub-display areas.
  • the weight determination module 603 is specifically configured to:
  • the weight coefficient of each reference sub-display area is calculated according to the above formula (4).
  • the compensation grayscale determination module 605 is specifically configured to:
  • the compensated grayscale value of the target sub-pixel under the target grayscale value is calculated according to the above formula (5).
  • the apparatus 600 for determining a compensated gray level may further include a pre-stored module 607 .
  • the pre-storage module 607 is configured to store the compensated gray scale value in the storage module of the display panel to be compensated.
  • the device for determining a compensated gray level in this embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal.
  • the device may be a mobile electronic device or a non-mobile electronic device.
  • the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (personal digital assistant).
  • UMPC ultra-mobile personal computer
  • netbook or a personal digital assistant
  • non-mobile electronic devices can be servers, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), television (television, TV), teller machine or self-service machine, etc., this application Examples are not specifically limited.
  • Network Attached Storage NAS
  • personal computer personal computer, PC
  • television television
  • teller machine or self-service machine etc.
  • the device for determining the compensated gray scale in the embodiment of the present application may be a device having an operating system.
  • the operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.
  • FIG. 8 shows a schematic diagram of a hardware structure of a device for determining a compensation voltage provided by an embodiment of the present application.
  • the compensation voltage determination device may include a processor 801 and a memory 802 storing computer program instructions.
  • processor 801 may include a central processing unit (CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • Memory 802 may include mass storage for data or instructions.
  • memory 802 may include a Hard Disk Drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive or two or more A combination of more than one of the above.
  • Memory 802 may include removable or non-removable (or fixed) media, where appropriate.
  • Storage 802 may be internal or external to the integrated gateway disaster recovery device, where appropriate.
  • memory 802 is non-volatile solid state memory.
  • memory 802 includes read only memory (ROM).
  • the ROM may be a mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically rewritable ROM (EAROM) or flash memory or A combination of two or more of the above.
  • PROM programmable ROM
  • EPROM erasable PROM
  • EEPROM electrically erasable PROM
  • EAROM electrically rewritable ROM
  • flash memory or A combination of two or more of the above.
  • the processor 801 reads and executes the computer program instructions stored in the memory 802 to implement any one of the compensation voltage determination methods in the foregoing embodiments.
  • the compensation voltage determination device may also include a communication interface 803 and a bus 810 .
  • the processor 801 , the memory 802 , and the communication interface 803 are connected through the bus 810 and complete the mutual communication.
  • the communication interface 803 is mainly used to implement communication between modules, apparatuses, units and/or devices in the embodiments of the present application.
  • the bus 810 includes hardware, software, or both, coupling the components of the compensation voltage determination device to each other.
  • the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, Enhanced Industry Standard Architecture (EISA) bus, Front Side Bus (FSB), HyperTransport (HT) Interconnect, Industry Standard Architecture (ISA) Bus, Infiniband Interconnect, Low Pin Count (LPC) Bus, Memory Bus, Microchannel Architecture (MCA) Bus, Peripheral Component Interconnect (PCI) Bus, PCI-Express (PCI-X) Bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association Local (VLB) bus or other suitable bus or a combination of two or more of these.
  • Bus 810 may include one or more buses, where appropriate. Although embodiments herein describe and illustrate a particular bus, this application contemplates any suitable bus or interconnect.
  • the compensation gray level determination device may execute the compensation gray level determination method in the embodiment of the present application, thereby realizing the compensation gray level determination method and the compensation electric gray level determination device described in conjunction with FIG. 2 and FIG. 6 .
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the method for determining the compensation gray scale in the above-mentioned embodiment can be implemented, and can achieve The same technical effect, in order to avoid repetition, will not be repeated here.
  • the above-mentioned computer-readable storage medium may include a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, etc., which is not limited herein.

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Abstract

本申请提供一种补偿灰阶确定方法、装置及设备。该方法包括：将显示面板的显示区划分为呈阵列分布的多个子显示区；在多个子显示区中选取至少两个子显示区为参考子显示区，其中，各参考子显示区相邻且其中一个参考子显示区包括待补偿的目标子像素；根据目标子像素的中心点与各参考子显示区的中心点之间的距离以及相邻参考子显示区的中心点之间的距离，确定各参考子显示区的权重系数；对各参考子显示区的权重系数以及各参考子显示区在目标灰阶值下的亮度均值进行加权求和，得到目标子像素在目标灰阶值下的目标亮度值；根据目标亮度值，确定目标子像素在目标灰阶值下的补偿灰阶值。根据本申请实施例，能够改善显示面板的偏色问题。

Description

补偿灰阶确定方法、装置及设备
相关申请的交叉引用
本申请要求享有于2020年12月11日提交的名称为“补偿灰阶确定方法、装置及设备”的中国专利申请第202011437349.3号的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及显示技术领域，具体涉及一种补偿灰阶确定方法、补偿灰阶确定装置及补偿灰阶确定设备。
背景技术
显示面板在显示过程中可能出现Mura现象，降低了显示面板的显示效果。为了避免出现Mura现象，可对显示面板进行Demura补偿。
在对显示面板进行Demura补偿的过程中，可以采用亮度采集设备采集显示面板的亮度数据，然而，由于亮度采集设备的一致性和稳定性存在问题，导致亮度采集设备采集的亮度数据不够准确，进而导致依据亮度采集设备采集的亮度数据进行Demura补偿后，显示面板仍存在偏色的问题。
发明内容
本申请实施例提供一种补偿灰阶确定方法、装置及设备，能够改善显示面板的偏色问题。
第一方面，本申请实施例提供一种补偿灰阶确定方法，其包括：将显示面板的显示区划分为呈阵列分布的多个子显示区；在多个子显示区中选取至少两个子显示区为参考子显示区，其中，各参考子显示区相邻且其中一个参考子显示区包括待补偿的目标子像素；根据目标子像素的中心点与 各参考子显示区的中心点之间的距离以及相邻参考子显示区的中心点之间的距离，确定各参考子显示区的权重系数；对各参考子显示区的权重系数以及各参考子显示区在目标灰阶值下的亮度均值进行加权求和，得到目标子像素在目标灰阶值下的目标亮度值；根据目标亮度值，确定目标子像素在目标灰阶值下的补偿灰阶值。
第二方面，本申请实施例提供一种补偿灰阶确定装置，其包括：
区域划分模块，用于将显示面板的显示区划分为呈阵列分布的多个子显示区；
参考区确定模块，用于在多个子显示区中选取至少两个子显示区为参考子显示区，其中，各参考子显示区相邻且其中一个参考子显示区包括待补偿的目标子像素；
权重确定模块，用于根据目标子像素的中心点与各参考子显示区的中心点之间的距离以及相邻参考子显示区的中心点之间的距离，确定各参考子显示区的权重系数；
目标亮度确定模块，用于对各参考子显示区的权重系数以及各参考子显示区在目标灰阶值下的亮度均值进行加权求和，得到目标子像素在目标灰阶值下的目标亮度值；
补偿灰阶确定模块，用于根据目标亮度值，确定目标子像素在目标灰阶值下的补偿灰阶值。
第三方面，本申请实施例提供了一种补偿灰阶确定设备，设备包括：处理器以及存储有计算机程序指令的存储器；
所述处理器执行所述计算机程序指令时实现如第一方面所述的补偿灰阶确定方法。
根据本申请实施例，待补偿的目标子像素在目标灰阶值下的目标亮度值是根据参考子显示区的权重系数以及参考子显示区的亮度均值的加权值确定的，且各参考子显示区相邻且至少两个参考子显示区中的一个参考子显示区包括目标子像素，即各参考子显示区位于目标子像素周围，并利用目标子像素的中心点与各参考子显示区的中心点之间的距离以及相邻参考子显示区的中心点之间的距离，确定各参考子显示区的权重系数，避免利 用亮度采集设备采集的亮度数据来确定的亮度均值作为目标亮度值，进而避免对同一行的两侧的子像素造成过渡补偿，改善显示面板偏色的问题。
附图说明
通过阅读以下参照附图对非限制性实施例所作的详细描述，本申请的其它特征、目的和优点将会变得更明显，其中，相同或相似的附图标记表示相同或相似的特征，附图并未按照实际的比例绘制。
图1示出根据本申请一种实施例提供的显示面板某一行各颜色子像素的亮度曲线示意图；
图2示出根据本申请一种实施例提供的补偿灰阶确定方法的流程示意图；
图3示出根据本申请一种实施例提供的参考子显示区的选取示意图；
图4示出根据本申请另一种实施例提供的参考子显示区的选取示意图；
图5示出根据本申请又一种实施例提供的参考子显示区的选取示意图；
图6示出根据本申请一种实施例提供的补偿灰阶确定装置的结构示意图；
图7示出根据本申请另一种实施例提供的补偿灰阶确定装置的结构示意图；
图8示出根据本申请一种实施例提供的补偿灰阶确定设备的结构示意图。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例，为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及具体实施例，对本申请进行进一步详细描述。应理解，此处所描述的具体实施例仅意在解释本申请，而不是限定本申请。对于本领域技术人员来说，本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请更好的理解。
在对显示面板进行补偿的过程中，申请人发现，补偿后的显示面板仍 存在偏色的问题，例如补偿后的显示面板两侧发紫。本申请的发明人对发生该问题的原因进行了研究，其中，图1示出本申请一种实施例提供的显示面板某一行各颜色子像素的亮度曲线示意图。示例性的，显示面板包括红色子像素、绿色子像素和蓝色子像素。图1为亮度采集设备采集的显示面板的中间一行的红色子像素、绿色子像素和蓝色子像素在224灰阶下的亮度数据。由于亮度采集设备采集的亮度数据的不准确性，如图1所示，亮度采集设备采集的红色子像素和蓝色子像素的亮度数据存在一个较明显的弧形趋势，即该行两侧的红色子像素的亮度值低于该行中间的红色子像素的亮度值，该行两侧的蓝色子像素的亮度值低于该行中间的蓝色子像素的亮度值，绿色子像素的亮度数据变化比较平缓。而实际上，同一行的红色子像素、绿色子像素和蓝色子像素的亮度数据都是比较平缓的，不存在图1所示的红色子像素和蓝色子像素的较明显的弧形趋势，在对显示面板进行Demura补偿的过程中，通常会利用显示面板的亮度均值作为目标亮度值，从而将同一行中两侧的红色子像素和蓝色子像素的亮度提高到目标亮度值，对红色子像素和蓝色子像素造成过度补偿现象，而绿色子像素的亮度变化不大，从而导致补偿后的显示面板仍偏色，例如导致补偿后的显示面板两侧发紫。
为解决上述问题，本申请实施例提供了一种补偿灰阶确定方法、补偿灰阶确定装置、补偿灰阶确定设备及计算机存储介质，以下将结合附图对补偿灰阶确定方法、补偿灰阶确定装置、补偿灰阶确定设备的各实施例进行说明。
本申请实施例提供一种补偿灰阶确定方法，用于确定显示面板的补偿灰阶值，显示面板可以是有机发光二极管(Organic Light Emitting Diode，OLED)显示面板。
图2示出根据本申请一种实施例提供的补偿灰阶确定方法的流程示意图。如图2所示，本申请实施例提供的补偿灰阶确定方法包括步骤110至步骤150。
步骤110，将显示面板的显示区划分为呈阵列分布的多个子显示区。
步骤120，在多个子显示区中选取至少两个子显示区为参考子显示区， 其中，各参考子显示区相邻且其中一个参考子显示区包括待补偿的目标子像素。
步骤130，根据目标子像素的中心点与各参考子显示区的中心点之间的距离以及相邻参考子显示区的中心点之间的距离，确定各参考子显示区的权重系数。
步骤140，对各参考子显示区的权重系数以及各参考子显示区在目标灰阶值下的亮度均值进行加权求和，得到目标子像素在目标灰阶值下的目标亮度值。
步骤150，根据目标亮度值，确定目标子像素在目标灰阶值下的补偿灰阶值。
根据本申请实施例，待补偿的目标子像素在目标灰阶值下的目标亮度值是根据参考子显示区的权重系数以及参考子显示区的亮度均值的加权值确定的，且各参考子显示区相邻且至少两个参考子显示区中的一个参考子显示区包括目标子像素，即各参考子显示区位于目标子像素周围，并利用目标子像素的中心点与各参考子显示区的中心点之间的距离以及相邻参考子显示区的中心点之间的距离，确定各参考子显示区的权重系数，避免利用亮度采集设备采集的亮度数据来确定的亮度均值作为目标亮度值，进而避免对同一行的两侧的子像素造成过渡补偿，改善显示面板偏色的问题。
在步骤110中，子显示区的形状可以是正多边形，例如，矩形、正五边形、正六边形等。示例性的，各子显示区的形状可以均为矩形区域，且各子显示区的长度及宽度相等。通过将显示面板的显示区划分为呈阵列分布的矩形的多个子显示区，可以便于后续参考子显示区的选取以及权重系数的计算，并且能够使选择的参考子显示区更符合目标子像素的实际亮度情况。
示例性的，步骤110具体可以包括：将显示面板的显示区划分为呈阵列分布的m行n列个子显示区。其中，m和n均为大于等于2的正整数。在一些可选的实施例中，可以按照从小到大的方式设置m、n的取值，直至在m、n的取值下显示面板无偏色，从而减小计算量。
在步骤130中，目标子像素的中心点与各所述参考子显示区的中心点 之间的距离，可以是目标子像素的中心点与各所述参考子显示区的中心点之间在行方向和列方向中至少一个方向上的距离。相邻参考子显示区的中心点之间的距离，可以是相邻参考子显示区的中心点之间在行方向和列方向中至少一个方向上的距离。
以各子显示区均为长度及宽度均相等的矩形区域为例，在一些可选的实施例中，目标子像素位于以两行两列的四个子显示区的中心点为顶点构成的第一矩形区域内。步骤120具体可以包括：在多个子显示区中选取呈两行两列的四个子显示区为参考子显示区，且以第一矩形区域的四个顶点为中心点的四个子显示区为参考子显示区。
也就是说，目标子像素位于显示面板的非边缘区域，如此，可以选取离目标子像素距离较近的四个子显示区作为参考子显示区，从而在确定目标子像素的目标亮度值时兼顾行方向上和列方向上的影响，以保证所确定的目标亮度值的准确性。
示例性的，目标子像素可以为显示面板中的任意一个子像素，不同位置的目标子像素所对应的参考子显示区的位置可以不同。
在一些可选的实施例中，在步骤130中，可以根据式(1)计算各参考子显示区的权重系数：
Figure PCTCN2021117114-appb-000001
其中，f表示权重系数，h表示目标子像素的中心点与参考子显示区的中心点之间在行方向上的距离，H表示相邻参考子显示区的中心点之间在行方向上的距离，v表示目标子像素的中心点与参考子显示区的中心点之间在列方向上的距离，V表示相邻参考子显示区的中心点之间在列方向上的距离。
在确定参考子显示区权重系数时，并没有直接利用目标子像素的中心点与参考子显示区的中心点之间的距离的倒数或距离倒数的平方作为权重系数，而是如上述式(1)所示，利用目标子像素的中心点与参考子显示区的中心点之间在行方向上及列方向上的距离，以及相邻参考子显示区的中心点之间在行方向上及列方向上的距离，来确定权重系数，如此可分别考虑在行方向上及列方向上的影响程度，并综合行方向上影响程度及列方 向上的影响程度，得到最终的权重系数，从而保证所得权重系数的准确性。
图3示出根据本申请一种实施例提供的参考子显示区的选取示意图。示例性的，显示面板100包括显示区AA和非显示区NA。图3示例性的示出了将显示面板的显示区AA划分为6行8列个子显示区A1，其中2行2列个子显示区分别为第一参考子显示区A11、第二参考子显示区A12、第三参考子显示区A13和第四参考子显示区A14，第一参考子显示区A11、第二参考子显示区A12、第三参考子显示区A13和第四参考子显示区A14的中心点分别为O1、O2、O3和O4，以O1、O2、O3和O4为四个顶点构成了第一矩形区域S1。目标子像素PT位于第一矩形区域S1内。
由上述式(1)可知，可以根据式(1.1)计算第一参考子显示区A11的权重系数：
Figure PCTCN2021117114-appb-000002
由上述式(1)可知，可以根据式(1.2)计算第二参考子显示区A12的权重系数：
Figure PCTCN2021117114-appb-000003
由上述式(1)可知，可以根据式(1.3)计算第三参考子显示区A13的权重系数：
Figure PCTCN2021117114-appb-000004
由上述式(1)可知，可以根据式(1.4)计算第四参考子显示区A14的权重系数：
Figure PCTCN2021117114-appb-000005
其中，f 1表示第一参考子显示区A11的权重系数，h 1表目标子像素PT的中心点与第一参考子显示区A11的中心点O1之间在行方向X上的距离，V 1表示目标子像素PT的中心点与第一参考子显示区A11的中心点O1之间在列方向Y上的距离。f 2表示第二参考子显示区A12的权重系数，h 2表目标子像素PT的中心点与第二参考子显示区A12的中心点O2之间在行方向X上的距离，V 2表示目标子像素PT的中心点与第二参考子显示区A12的 中心点O2之间在列方向Y上的距离。f 3表示第三参考子显示区A13的权重系数，h 3表目标子像素PT的中心点与第三参考子显示区A13的中心点O3之间在行方向X上的距离，V 3表示目标子像素PT的中心点与第三参考子显示区A13的中心点O3之间在列方向Y上的距离。f 4表示第四参考子显示区A14的权重系数，h 4表目标子像素PT的中心点与第四参考子显示区A14的中心点O4之间在行方向X上的距离，V 4表示目标子像素PT的中心点与第四参考子显示区A14的中心点O4之间在列方向Y上的距离。
在一些可选的实施例中，仍以参考子显示区的数量为四个，分别为第一参考子显示区A11、第二参考子显示区A12、第三参考子显示区A13和第四参考子显示区A14为例，在步骤140中，可以根据式(2)计算目标子像素在目标灰阶值下的目标亮度值：
L X＝L 1×f 1+L 2×f 2+L 3×f 3+L 4×f 4      式(2)
其中，L X表示目标亮度值，L 1表示第一参考子显示区的亮度均值，f 1表示第一参考子显示区的权重系数，L 2表示第二参考子显示区的亮度均值，f 2表示第二参考子显示区的权重系数，L 3表示第三参考子显示区的亮度均值，f 3表示第三参考子显示区的权重系数，L 4表示第四参考子显示区的亮度均值，f 4表示第四参考子显示区的权重系数。
根据式(2)所确定的目标亮度值，能够降低亮度采集设备的不准确性所造成的影响，进而在后续的补偿过程中，能够避免对同一行的两侧的子像素造成过渡补偿，改善显示面板偏色的问题。
示例性的，在步骤140之前，本申请实施例提供的补偿灰阶确定方法还可以包括：获取各参考子显示区中的各子像素在目标灰阶值下的亮度值；根据各子像素在目标灰阶值下的亮度值，确定各参考子显示区的亮度均值。可以对参考子显示区内的各子像素在目标灰阶值下的亮度值进行求和，并计算各亮度值之和与各子像素的数量的比值，得到各参考子显示区的亮度均值。或者，可以过滤掉存在明显偏差的亮度值，并计算过滤后的亮度值之和与过滤后的亮度值的数量的比值，得到各参考子显示区的亮度均值。
示例性的，目标灰阶值可以是显示面板能够显示的任意灰阶值。例如，显示面板能够显示的灰阶范围为0～255，目标灰阶值可以是0～255中的任 意一个数值。例如，在确定显示面板的补偿灰阶的过程中，可以先确定一些指定灰阶绑点下的补偿灰阶，然后利用线性插值法确定灰阶绑点之外的灰阶对应的补偿灰阶。具体的，目标灰阶值可以是32灰阶、64灰阶、96灰阶、128灰阶、160灰阶、192灰阶、224灰阶以及255灰阶中的任意一个灰阶。
具体的，在显示面板被点亮后，可以利用光学量测设备，例如色彩分析仪，或者利用高分辨率和高精度的相机如电荷耦合器件(Charge Coupled Device，CCD)相机对显示面板进行拍摄，生成亮度数据。可对显示面板的整个显示区进行拍照，即被拍摄区域包括整个显示区，而在后续过程中可以仅采用参考子显示区对应的亮度数据。也可仅对显示面板的参考子显示区进行拍照，即被拍摄区域仅包括目标显示区。
仍以各子显示区均为长度及宽度均相等的矩形区域为例，在一些可选的实施例中，目标子像素位于以相邻两个子显示区的中心点的连线和与连线平行的显示区的边缘构成的第二矩形区域内。步骤120具体可以包括：在多个子显示区中选取两个子显示区为参考子显示区，且以连线的两个端点为中心点的两个子显示区为参考子显示区。
也就是说，目标子像素位于显示面板的边缘区域，如此，可以选取离目标子像素距离较近的两个子显示区作为参考子显示区，从而在确定目标子像素的目标亮度值时仅考虑离目标子像素距离较近的两个子显示区的影响，以保证所确定的目标亮度值的准确性。
图4示出根据本申请一种实施例提供的参考子显示区的选取示意图。示例性的，显示面板100包括显示区AA和非显示区NA。图4示例性的示出了将显示面板的显示区AA划分为7行9列个子显示区A1，其中，呈1行2列的两个子显示区为两个参考子显示区A11’、A12’，两个参考子显示区A11’、A12’的中心点分别为O1’、O2’，两个中心点O1’、O2’的连线及与该连线平行的显示区的边缘构成第二矩形区域S2。目标子像素PT位于第二矩形区域S2内。两个参考子显示区A11’、A12’呈1行2列分布，也就是说两个参考子显示区A11’、A12’的中心点在列方向Y上的距离为零。
在一些可选的实施例中，如图4所示，若构成第二矩形区域的连线和 显示区的边缘在行方向X上平行，则可以根据式(3)计算各参考子显示区权重系数：
Figure PCTCN2021117114-appb-000006
其中，f′表示权重系数，h′表示目标子像素的中心点与参考子显示区的中心点之间在行方向X上的距离，H表示相邻参考子显示区的中心点之间在行方向X上的距离。
由上述式(3)可知，可以根据式(3.1)计算参考子显示区A11’的权重系数f 1′：
Figure PCTCN2021117114-appb-000007
由上述式(3)可知，可以根据式(3.2)计算参考子显示区A12’的权重系数f 2′：
Figure PCTCN2021117114-appb-000008
其中，h 1′表示目标子像素的中心点与参考子显示区A11’的中心点O1’之间在行方向X上的距离，h 2′表示目标子像素的中心点与参考子显示区A12’的中心点O1’之间在行方向X上的距离。
进一步的，在步骤140中，可以根据式(2.1)计算目标子像素在目标灰阶值下的目标亮度值：
L X＝L 1′×f 1′+L 2′×f 2′       式(2.1)
其中，L X表示目标亮度值，L 1′表示参考子显示区A11’的亮度均值，f 1′表示参考子显示区A11’的权重系数，L 2′表示参考子显示区A12’的亮度均值，f 2′表示参考子显示区A12’的权重系数。
图5示出根据本申请一种实施例提供的参考子显示区的选取示意图。示例性的，显示面板100包括显示区AA和非显示区NA。图5示例性的示出了将显示面板的显示区AA划分为6行8列个子显示区A1，其中，呈2行1列的两个子显示区为两个参考子显示区A13’、A14’，两个参考子显示区A13’、A14’的中心点分别为O3’、O4’，两个中心点O3’、O4’的连线及与该连线平行的显示区的边缘构成第二矩形区域S2。目标子像素PT位于第二矩形区域S2内。两个参考子显示区A13’、A14’呈2行1列分布，也 就是说两个参考子显示区A13’、A14’的中心点在行方向X上的距离为零。
在一些可选的实施例中，如图5所示，若构成第二矩形区域的连线和显示区的边缘在列方向Y上平行，根据式(4)计算各参考子显示区权重系数：
Figure PCTCN2021117114-appb-000009
其中，f′表示权重系数，v′表示目标子像素的中心点与参考子显示区的中心点之间在列方向Y上的距离，V表示相邻参考子显示区的中心点之间在列方向Y上的距离。
由上述式(4)可知，可以根据式(4.1)计算参考子显示区A13’的权重系数f 3′：
Figure PCTCN2021117114-appb-000010
由上述式(4)可知，可以根据式(4.2)计算参考子显示区A14’的权重系数f 4′：
Figure PCTCN2021117114-appb-000011
其中，v 3′表示目标子像素的中心点与参考子显示区A13’的中心点O3’之间在列方向Y上的距离，v 4′表示目标子像素的中心点与参考子显示区A14’的中心点O4’之间在列方向Y上的距离。
进一步的，在步骤140中，可以根据式(2.2)计算目标子像素在目标灰阶值下的目标亮度值：
L X＝L 3′×f 3′+L 4′×f 4′      式(2.2)
其中，L X表示目标亮度值，L 3′表示参考子显示区A13’的亮度均值，f 3′表示参考子显示区A13’的权重系数，L 4′表示参考子显示区A14’的亮度均值，f 4′表示参考子显示区A14’的权重系数。
在一些可选的实施例中，在步骤150中，可以根据式(5)计算目标子像素在目标灰阶值下的补偿灰阶值：
Figure PCTCN2021117114-appb-000012
其中，N x表示补偿灰阶值，N表示目标灰阶值，L X表示目标亮度值， L N表示目标子像素在目标灰阶值下的实际亮度值，Gamma表示显示面板的伽马值。
根据上述式(5)，可以准确得到所需的补偿灰阶值。
可以理解的是，L N即为子像素补偿前的实际亮度值。
图6示出根据本申请一种实施例提供的补偿灰阶确定装置的结构示意图。如图6所示，本申请实施例提供的补偿灰阶确定装置600包括区域划分模块601，参考区确定模块602，权重确定模块603，目标亮度确定模块604及补偿灰阶确定模块605。
区域划分模块601，用于将显示面板的显示区划分为呈阵列分布的多个子显示区；
参考区确定模块602，用于在多个子显示区中选取至少两个子显示区为参考子显示区，其中，各参考子显示区相邻且其中一个参考子显示区包括待补偿的目标子像素；
权重确定模块603，用于根据目标子像素的中心点与各参考子显示区的中心点之间的距离以及相邻参考子显示区的中心点之间的距离，确定各参考子显示区的权重系数；
目标亮度确定模块604，用于对各参考子显示区的权重系数以及各参考子显示区在目标灰阶值下的亮度均值进行加权求和，得到目标子像素在目标灰阶值下的目标亮度值；
补偿灰阶确定模块605，用于根据目标亮度值，确定目标子像素在目标灰阶值下的补偿灰阶值。
根据本申请实施例，待补偿的目标子像素在目标灰阶值下的目标亮度值是根据参考子显示区的权重系数以及参考子显示区的亮度均值的加权值确定的，且各参考子显示区相邻且至少两个参考子显示区中的一个参考子显示区包括目标子像素，即各参考子显示区位于目标子像素周围，并利用目标子像素的中心点与各参考子显示区的中心点之间的距离以及相邻参考子显示区的中心点之间的距离，确定各参考子显示区的权重系数，避免利用亮度采集设备采集的亮度数据来确定的亮度均值作为目标亮度值，进而避免对同一行的两侧的子像素造成过渡补偿，改善显示面板偏色的问题。
在一些可选的实施例中，各子显示区均为长度及宽度均相等的矩形区域。
在一些可选的实施例中，目标子像素位于以两行两列的四个子显示区的中心点为顶点构成的第一矩形区域内，参考区确定模块602具体用于：
在多个子显示区中选取四个子显示区为参考子显示区，且以第一矩形区域的四个顶点为中心点的四个子显示区为参考子显示区。
在一些可选的实施例中，权重确定模块603具体用于：
根据上述式(1)计算各参考子显示区的权重系数。
在一些可选的实施例中，四个参考子显示区包括第一参考子显示区、第二参考子显示区、第三参考子显示区和第四参考子显示区，目标亮度确定模块604具体用于：
根据上述式(2)计算目标亮度值。
在一些可选的实施例中，目标子像素位于以相邻两个子显示区的中心点的连线和与连线平行的显示区的边缘构成的第二矩形区域内，参考区确定模块602具体用于：
在多个子显示区中选取两个子显示区为参考子显示区，且以连线的两个端点为中心点的两个子显示区为参考子显示区。
在一些可选的实施例中，权重确定模块603具体用于：
若构成第二矩形区域的连线和显示区的边缘在行方向上平行，根据上述式(3)计算各参考子显示区权重系数；
若构成第二矩形区域的连线和显示区的边缘在列方向上平行，根据上述式(4)计算各参考子显示区权重系数。
在一些可选的实施例中，补偿灰阶确定模块605具体用于：
根据上述式(5)计算目标子像素在目标灰阶值下的补偿灰阶值。
在一些可选的实施例中，请参考图7，本申请实施例提供的补偿灰阶确定装置600还可以包括预存模块607。预存模块607，用于将补偿灰阶值存储至待补偿显示面板的存储模块中。
本申请实施例中的补偿灰阶确定装置可以是装置，也可以是终端中的部件、集成电路、或芯片。该装置可以是移动电子设备，也可以为非移动 电子设备。示例性的，移动电子设备可以为手机、平板电脑、笔记本电脑、掌上电脑、车载电子设备、可穿戴设备、超级移动个人计算机(ultra-mobile personal computer，UMPC)、上网本或者个人数字助理(personal digital assistant，PDA)等，非移动电子设备可以为服务器、网络附属存储器(Network Attached Storage，NAS)、个人计算机(personal computer，PC)、电视机(television，TV)、柜员机或者自助机等，本申请实施例不作具体限定。
本申请实施例中的补偿灰阶确定装置可以为具有操作系统的装置。该操作系统可以为安卓(Android)操作系统，可以为ios操作系统，还可以为其他可能的操作系统，本申请实施例不作具体限定。
图8示出了本申请实施例提供的补偿电压确定设备的硬件结构示意图。
在补偿电压确定设备可以包括处理器801以及存储有计算机程序指令的存储器802。
具体地，上述处理器801可以包括中央处理器(CPU)，或者特定集成电路(Application Specific Integrated Circuit，ASIC)，或者可以被配置成实施本申请实施例的一个或多个集成电路。
存储器802可以包括用于数据或指令的大容量存储器。举例来说而非限制，存储器802可包括硬盘驱动器(Hard Disk Drive，HDD)、软盘驱动器、闪存、光盘、磁光盘、磁带或通用串行总线(Universal Serial Bus，USB)驱动器或者两个或更多个以上这些的组合。在合适的情况下，存储器802可包括可移除或不可移除(或固定)的介质。在合适的情况下，存储器802可在综合网关容灾设备的内部或外部。在特定实施例中，存储器802是非易失性固态存储器。在特定实施例中，存储器802包括只读存储器(ROM)。在合适的情况下，该ROM可以是掩模编程的ROM、可编程ROM(PROM)、可擦除PROM(EPROM)、电可擦除PROM(EEPROM)、电可改写ROM(EAROM)或闪存或者两个或更多个以上这些的组合。
处理器801通过读取并执行存储器802中存储的计算机程序指令，以实现上述实施例中的任意一种补偿电压确定方法。
在一个示例中，补偿电压确定设备还可包括通信接口803和总线810。其中，如图8所示，处理器801、存储器802、通信接口803通过总线810连接并完成相互间的通信。
通信接口803，主要用于实现本申请实施例中各模块、装置、单元和/或设备之间的通信。
总线810包括硬件、软件或两者，将补偿电压确定设备的部件彼此耦接在一起。举例来说而非限制，总线可包括加速图形端口(AGP)或其他图形总线、增强工业标准架构(EISA)总线、前端总线(FSB)、超传输(HT)互连、工业标准架构(ISA)总线、无限带宽互连、低引脚数(LPC)总线、存储器总线、微信道架构(MCA)总线、外围组件互连(PCI)总线、PCI-Express(PCI-X)总线、串行高级技术附件(SATA)总线、视频电子标准协会局部(VLB)总线或其他合适的总线或者两个或更多个以上这些的组合。在合适的情况下，总线810可包括一个或多个总线。尽管本申请实施例描述和示出了特定的总线，但本申请考虑任何合适的总线或互连。
该补偿灰阶确定设备可以执行本申请实施例中的补偿灰阶确定方法，从而实现结合图2和图6描述的补偿灰阶确定方法和补偿电灰阶确定装置。
本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序，该计算机程序被处理器执行时可实现上述实施例中的补偿灰阶确定方法，且能达到相同的技术效果，为避免重复，这里不再赘述。其中，上述计算机可读存储介质可包括只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等，在此并不限定。
依照本申请如上文所述的实施例，这些实施例并没有详尽叙述所有的细节，也不限制该申请仅为所述的具体实施例。显然，根据以上描述，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本申请的原理和实际应用，从而使所属技术领域技术人员能很好地利用本申请以及在本申请基础上的修改使用。本申请仅受权利要求书及其全部范围和等效物的限制。

Claims (14)

  1. 一种补偿灰阶确定方法，所述方法包括：
    将显示面板的显示区划分为呈阵列分布的多个子显示区；
    在多个所述子显示区中选取至少两个所述子显示区为参考子显示区，其中，各所述参考子显示区相邻且其中一个所述参考子显示区包括待补偿的目标子像素；
    根据所述目标子像素的中心点与各所述参考子显示区的中心点之间的距离以及相邻所述参考子显示区的中心点之间的距离，确定各所述参考子显示区的权重系数；
    对各所述参考子显示区的权重系数以及各所述参考子显示区在目标灰阶值下的亮度均值进行加权求和，得到所述目标子像素在所述目标灰阶值下的目标亮度值；
    根据所述目标亮度值，确定所述目标子像素在所述目标灰阶值下的补偿灰阶值。
  2. 根据权利要求1所述的补偿灰阶确定方法，其中，各所述子显示区均为各边均相等的正多边形区域。
  3. 根据权利要求2所述的补偿灰阶确定方法，其中，所述各子显示区呈矩形，所述目标子像素位于以两行两列的四个所述子显示区的中心点为顶点构成的第一矩形区域内，所述在多个所述子显示区中选取至少两个所述子显示区为参考子显示区，包括：
    在多个所述子显示区中选取四个所述子显示区为所述参考子显示区，且以所述第一矩形区域的四个顶点为中心点的四个所述子显示区为所述参考子显示区。
  4. 根据权利要求3所述的补偿灰阶确定方法，其中，所述根据所述目标子像素的中心点与各所述参考子显示区的中心点之间的距离以及相邻所述参考子显示区的中心点之间的距离，确定各所述参考子显示区的权重系数，包括：
    根据式(1)计算各所述参考子显示区的权重系数：
    Figure PCTCN2021117114-appb-100001
    其中，f表示所述权重系数，h表示所述目标子像素的中心点与所述参考子显示区的中心点之间在行方向上的距离，H表示相邻所述参考子显示区的中心点之间在行方向上的距离，v表示所述目标子像素的中心点与所述参考子显示区的中心点之间在列方向上的距离，V表示相邻所述参考子显示区的中心点之间在列方向上的距离。
  5. 根据权利要求4所述的补偿灰阶确定方法，其中，四个所述参考子显示区包括第一参考子显示区、第二参考子显示区、第三参考子显示区和第四参考子显示区，所述对各所述参考子显示区的权重系数以及各所述参考子显示区在目标灰阶值下的亮度均值进行加权求和，得到所述目标子像素在所述目标灰阶值下的目标亮度值，包括：
    根据式(2)计算所述目标亮度值：
    L X＝L 1×f 1+L 2×f 2+L 3×f 3+L 4×f 4  式(2)
    其中，L X表示所述目标亮度值，L 1表示所述第一参考子显示区的亮度均值，f 1表示所述第一参考子显示区的权重系数，L 2表示所述第二参考子显示区的亮度均值，f 2表示所述第二参考子显示区的权重系数，L 3表示所述第三参考子显示区的亮度均值，f 3表示所述第三参考子显示区的权重系数，L 4表示所述第四参考子显示区的亮度均值，f 4表示所述第四参考子显示区的权重系数。
  6. 根据权利要求2所述的补偿灰阶确定方法，其中，所述目标子像素位于以相邻两个所述子显示区的中心点的连线和与所述连线平行的所述显示区的边缘构成的第二矩形区域内，所述在多个所述子显示区中选取至少两个所述子显示区为参考子显示区，包括：
    在多个所述子显示区中选取两个所述子显示区为参考子显示区，且以所述连线的两个端点为中心点的两个所述子显示区为所述参考子显示区。
  7. 根据权利要求6所述的补偿灰阶确定方法，其中，所述根据所述目标子像素的中心点与各所述参考子显示区的中心点之间的距离以及相邻所述参考子显示区的中心点之间的距离，确定各所述参考子显示区的权重系数，包括：
    若构成所述第二矩形区域的所述连线和所述显示区的边缘在行方向上 平行，根据式(3)计算各所述参考子显示区权重系数：
    Figure PCTCN2021117114-appb-100002
    若构成所述第二矩形区域的所述连线和所述显示区的边缘在列方向上平行，根据式(4)计算各所述参考子显示区权重系数：
    Figure PCTCN2021117114-appb-100003
    其中，f′表示所述权重系数，h′表示所述目标子像素的中心点与所述参考子显示区的中心点之间在行方向上的距离，H表示相邻所述参考子显示区的中心点之间在行方向上的距离，v′表示所述目标子像素的中心点与所述参考子显示区的中心点之间在列方向上的距离，V表示相邻所述参考子显示区的中心点之间在列方向上的距离。
  8. 根据权利要求1所述的补偿灰阶确定方法，其中，所述根据所述目标亮度值，确定所述目标子像素在所述目标灰阶值下的补偿灰阶值，包括：
    根据式(5)计算所述目标子像素在所述目标灰阶值下的补偿灰阶值：
    Figure PCTCN2021117114-appb-100004
    其中，N x表示所述补偿灰阶值，N表示所述目标灰阶值，L X表示所述目标亮度值，L N表示所述目标子像素在所述目标灰阶值下的实际亮度值，Gamma表示所述显示面板的伽马值。
  9. 根据权利要求1所述的补偿灰阶确定方法，其中，所述将显示面板的显示区划分为呈阵列分布的多个子显示区，包括：
    将显示面板的显示区划分为呈阵列分布的m行n列个子显示区，m和n均为大于等于2的正整数；
    按照从小到大的方式设置m、n的取值，直至在m、n的取值下所述显示面板无偏色。
  10. 根据权利要求1所述的补偿灰阶确定方法，其中，所述目标子像素的中心点与各所述参考子显示区的中心点之间的距离，包括所述目标子像素的中心点与各所述参考子显示区的中心点之间在行方向和列方向中至少一个方向上的距离；
    相邻所述参考子显示区的中心点之间的距离，包括相邻所述参考子显 示区的中心点之间在行方向和列方向中至少一个方向上的距离。
  11. 根据权利要求1所述的补偿灰阶确定方法，其中，在所述对各所述参考子显示区的权重系数以及各所述参考子显示区在目标灰阶值下的亮度均值进行加权求和之前，所述方法还包括：
    获取各所述参考子显示区中的各子像素在目标灰阶值下的亮度值；
    根据所述各子像素在目标灰阶值下的亮度值，确定各所述参考子显示区的亮度均值。
  12. 根据权利要求11所述的补偿灰阶确定方法，其中，所述根据所述各子像素在目标灰阶值下的亮度值，确定各所述参考子显示区的亮度均值，包括：
    过滤所述各子像素在目标灰阶值下存在明显偏差的亮度值；
    计算过滤后的亮度值之和与过滤后的亮度值的数量的比值，得到各所述参考子显示区的亮度均值。
  13. 根据权利要求7所述的补偿灰阶确定方法，其中，所述根据所述目标子像素的中心点与各所述参考子显示区的中心点之间的距离以及相邻所述参考子显示区的中心点之间的距离，确定各所述参考子显示区的权重系数，包括：
    根据式(2.1)计算各所述参考子显示区的权重系数：
    L X＝L 1′×f 1′+L 2′×f 2′  式(2.1)
    其中，L X表示所述目标亮度值，L 1′表示其中一个所述参考子显示区的亮度均值，f 1′表示其中一个所述参考子显示区的权重系数，L 2′表示另一个所述参考子显示区的亮度均值，f 2′表示另一个所述参考子显示区的权重系数。
  14. 一种补偿灰阶确定设备，包括处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至13中任意一项所述的补偿灰阶确定方法。
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