WO2022252555A1 - 显示面板的灰阶补偿方法及其装置 - Google Patents

显示面板的灰阶补偿方法及其装置 Download PDF

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WO2022252555A1
WO2022252555A1 PCT/CN2021/137381 CN2021137381W WO2022252555A1 WO 2022252555 A1 WO2022252555 A1 WO 2022252555A1 CN 2021137381 W CN2021137381 W CN 2021137381W WO 2022252555 A1 WO2022252555 A1 WO 2022252555A1
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compensation
gray scale
display area
compensated
pixel
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PCT/CN2021/137381
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English (en)
French (fr)
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任春辉
周小康
张金泉
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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 WO2022252555A1 publication Critical patent/WO2022252555A1/zh
Priority to US18/342,076 priority Critical patent/US20230343303A1/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
    • G09G3/34—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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. 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
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • 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
    • G09G2320/02—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
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours

Definitions

  • the present application relates to the field of display technology, in particular to a method and device for gray scale compensation of a display panel.
  • the organic light emitting diode (Organic Light Emitting Diode, OLED) display panel has the problem of display brightness uniformity, that is, the OLED display panel often produces the phenomenon of brightness display unevenness (mura).
  • the method of compensating for uneven brightness display is divided into internal compensation and external compensation.
  • the method of external compensation refers to the method of sensing the electrical or optical characteristics of pixels through an external drive circuit or device, and then performing compensation. Due to the advantages of simple structure and flexible method during external compensation, the optical extraction method is widely used at this stage.
  • the compensated display panel has color cast in some areas, and the compensation effect is not good.
  • the present application provides a grayscale compensation method and device for a display panel, so as to improve the display effect of the compensated display panel.
  • an embodiment of the present application provides a grayscale compensation method for a display panel, which includes: dividing the display area of the display panel into a first display area and a second display area, and setting the display area between the first display area and the second display area.
  • the transitional display area between the display areas configure the first compensation algorithm to the first display area, so that the first compensation gray scale of the first display area is obtained according to the first compensation algorithm, and configure the second display area to be different from the first compensation algorithm
  • the second compensation algorithm so that the second compensation gray scale of the second display area is obtained according to the second compensation algorithm
  • the transition display area is configured with a third compensation algorithm different from the first compensation algorithm and the second compensation algorithm, so that the transition display
  • the third compensation gray scale of the region is obtained according to the third compensation algorithm; and the display panel is configured to display the picture according to the first compensation gray scale, the second compensation gray scale and the third compensation gray scale.
  • an embodiment of the present application provides a grayscale compensation device for a display panel, which is used for performing grayscale compensation on a display panel.
  • the display panel includes a first display area, a second display area, and
  • the gray scale compensation device of the display panel includes: a first compensation algorithm unit configured to configure the first compensation algorithm for the first display area, so that the first compensation gray scale of the first display area according to The first compensation algorithm is obtained; the second compensation algorithm unit is used to configure the second compensation algorithm to the second display area, so that the second compensation gray scale of the second display area is obtained according to the second compensation algorithm; the third compensation algorithm unit is used The third compensation algorithm is configured for the transitional display area, so that the third compensation gray scale of the transitional display area is obtained according to the third compensation algorithm; the compensation driving unit is used to configure the display panel according to the first compensation gray scale, the second compensation gray level and the third compensation gray scale display screen.
  • the first compensation algorithm is configured for the first display area
  • the second compensation algorithm is configured for the second display area
  • different display areas have independent compensation algorithms and compensation parameters. , so as to avoid the color cast phenomenon in some areas caused by the same compensation algorithm for the entire display panel.
  • a transitional display area is set between the first display area and the second display area of the display panel
  • a third compensation algorithm is configured for the transitional display area, so as to ease the gap between the first display area and the second display area.
  • the compensation difference makes there be a transition area in the compensated display effect between the first display area and the second display area, and improves the display effect of the compensated display panel.
  • FIG. 1 is a flow chart of a grayscale compensation method for a display panel provided by an embodiment of the present application
  • Fig. 2 is a flow chart of the steps of configuring the third compensation algorithm to the transition display area in the gray scale compensation method of the display panel provided by an embodiment of the present application;
  • Fig. 3 is a flow chart of the steps of obtaining the third compensation gray scale according to the coordinates of the pixel to be compensated, the actual brightness and the third compensation algorithm in the gray scale compensation method of the display panel provided by an embodiment of the present application;
  • FIG. 4 is a schematic structural diagram of a display panel in a grayscale compensation method for a display panel provided by an embodiment of the present application.
  • FIG. 5 is a structural block diagram of a grayscale compensation device for a display panel provided by an embodiment of the present application.
  • the display panel may be an Organic Light Emitting Diode (OLED) display panel.
  • OLED Organic Light Emitting Diode
  • the display panel may also be It is a liquid crystal display panel (Liquid Crystal Display, LCD), a display panel using a micro-LED (Micro-LED), a light-emitting diode (Light Emitting Diode, LED) device, etc.
  • FIG. 1 shows a flowchart of a grayscale compensation method for a display panel provided by an embodiment of the present application.
  • the grayscale compensation method for a display panel in this embodiment includes the following steps.
  • a coordinate system of pixels is established on the display panel.
  • the display panel includes a plurality of sub-pixels arranged in the display area, each sub-pixel can display a color, and the plurality of sub-pixels include, for example, red sub-pixels, green sub-pixels and blue sub-pixels.
  • a pixel point refers to a sub-pixel.
  • the display area of the display panel is divided into a first display area, a second display area and a transitional display area arranged between the first display area and the second display area.
  • Three compensation algorithms are obtained.
  • the display panel is configured to display images according to the first compensation gray scale, the second compensation gray scale and the third compensation gray scale.
  • the first compensation algorithm is configured for the first display area
  • the second compensation algorithm is configured for the second display area
  • different display areas have independent compensation algorithms and compensation parameters, In this way, the phenomenon of color cast in some areas caused by the same compensation algorithm used in the entire display panel can be avoided.
  • a transitional display area is set between the first display area and the second display area of the display panel
  • a third compensation algorithm is configured for the transitional display area, so as to ease the gap between the first display area and the second display area.
  • the compensation difference makes there be a transition area in the compensated display effect between the first display area and the second display area, and improves the display effect of the compensated display panel.
  • Fig. 2 shows a flow chart of the steps of configuring the third compensation algorithm to the transition display area in the gray scale compensation method of the display panel provided by an embodiment of the present application, and the steps are respectively to the first display area, the second display area and the transition display
  • the areas are configured with different first compensation algorithms, second compensation algorithms and third compensation algorithms, so that the first compensation gray scale of the first display area is obtained according to the first compensation algorithm, and the second compensation gray scale of the second display area is obtained according to Obtained by the second compensation algorithm, the third compensation gray scale of the transition display area obtained according to the third compensation algorithm also includes:
  • the third compensated gray scale is obtained according to the coordinates of the pixel to be compensated, the actual brightness and the third compensation algorithm.
  • Fig. 3 shows the flow chart of the steps of obtaining the third compensation gray scale according to the coordinates of the pixels to be compensated, the actual brightness and the third compensation algorithm in the gray scale compensation method of the display panel provided by one embodiment of the present application, and the steps are based on the The coordinates of the compensated pixel point, the actual brightness and the third compensation algorithm to obtain the third compensated gray scale also include
  • the first reference gray scale is obtained according to the actual brightness of the pixel to be compensated and the first compensation algorithm.
  • the second reference gray scale is obtained according to the actual brightness of the pixel to be compensated and the second compensation algorithm.
  • a first weight value corresponding to the first reference gray scale and a second weight value corresponding to the second reference gray scale are obtained according to the coordinates of the pixel point to be compensated.
  • the third compensation gray scale is obtained according to the first reference gray scale, the second reference gray scale, the first weight value and the second weight value.
  • the first display area DA1 is rectangular
  • the transitional display area TA is rectangular and ring-shaped and surrounds the periphery of the first display area DA1
  • the second display area DA2 surrounds the periphery of the transitional display area TA.
  • the first display area DA1 is located in the central area of the display panel
  • the second display area DA2 is located in the peripheral area of the display panel.
  • the center area and edge area of the display panel are compensated separately to ensure that more appropriate compensation algorithms can be adapted to the center area and edge area respectively, and to a certain extent alleviate the color cast phenomenon of the edge area of the display panel after compensation.
  • the coordinate system includes a first coordinate axis A1 and a second coordinate axis A2 that are perpendicular to each other.
  • the first coordinate axis A1 is parallel to a pair of sides of the first display area DA1
  • the second coordinate axis A2 is parallel to the other pair of sides of the first display area DA1 .
  • a plurality of pixels in the display panel are arranged in an array
  • the first coordinate axis A1 is, for example, parallel to the row direction of the pixel arrangement structure
  • the second coordinate axis A2 is, for example, parallel to the column of the pixel arrangement structure direction.
  • the coordinates of the pixel along the first coordinate axis A1 represent which column the pixel is located in the pixel arrangement structure
  • the coordinates of the pixel along the second coordinate axis A2 represent which row the pixel is located in the pixel arrangement structure
  • the transitional display area TA Since the transitional display area TA is in the shape of a rectangular ring, it includes a rectangular inner boundary adjacent to the first display area DA1 and a rectangular outer boundary adjacent to the second display area DA2 .
  • set the coordinates of the four vertices of the inner boundary of the transitional display area TA as (m1, n1), (m1, n2), (m2, n1), (m2, n2), respectively, where m1 and m2 are vertices or pixels
  • the coordinates of the four vertices that set the outer boundary of the transition display area TA are (x1, y1), (x1, y2), (x2, y1), (x2, y2), respectively, and x1 and x2 are vertices or the coordinate value of the pixel point along the second coordinate axis A2, that is, the number of rows where the vertex or pixel point is located; number of columns.
  • the transition display area TA includes a plurality of sub-transition areas, and each sub-transition area is rectangular.
  • the multiple sub-transition areas are formed by dividing the transitional display area TA by the intersection of the extension lines of multiple sides of the first display area DA1 and the inner boundary of the second display area DA2 .
  • the magnitude of the first weight value is negatively correlated with the distance from the pixel to be compensated to the first display area
  • the magnitude of the second weight is negatively correlated with the distance from the pixel to be compensated to the second display area. Therefore, the closer the pixel to be compensated in the transition display area is to the first display area, the closer the compensation effect is to the compensation effect of the pixel in the first display area, and the closer the pixel to be compensated in the transition display area is to the second display area, the compensation effect is closer to the compensation effect of the pixel in the first display area. The closer the effect is to the compensation effect of the pixels in the second display area, the weighted transition of the compensation effect of the display panel from the first display area to the second display area is achieved, and the display effect of the compensated display panel is improved.
  • the plurality of sub-transition areas include a first sub-transition area SA1 located between the first display area DA1 and the second display area DA2 in a direction parallel to the first coordinate axis A1 .
  • the first display area DA1 , the first sub-transition area SA1 and the second display area DA2 are arranged along the first direction.
  • the first sub-transition area SA1 includes opposite first sides E1 and second sides E2, the first side E1 coincides with a side of the first display area DA1, and the second side E2 coincides with a side of the second display area DA2.
  • the first sub-transition area SA1 is the sub-transition area on the left side of the first display area DA1 as an example for illustration, the coordinate value of the first side E1 on the first coordinate axis A1 is n1, and the second side The coordinate value of E2 on the first coordinate axis A1 is y1.
  • the step S523 of obtaining the first weight value corresponding to the first reference gray scale and the second weight value corresponding to the second reference gray scale according to the coordinates of the pixel point to be compensated includes the following steps:
  • the first weight value is obtained according to the following formula:
  • k1 is the first weight value
  • b1 is the coordinate value of the pixel point to be compensated on the first coordinate axis A1
  • n1 is the coordinate value of the first side E1 on the first coordinate axis A1
  • y1 is the second side E2 on the first coordinate axis Coordinate value on axis A1.
  • the second weight value is obtained according to the following formula:
  • k2 is the second weight value.
  • the multiple sub-transition areas include a second sub-transition area SA2, and the second sub-transition area SA2 includes opposite first vertex V1 and second vertex V2, the first vertex V1 coincides with a vertex of the first display area DA1, and the second vertex V2 It is a vertex of the transition display area TA.
  • the second sub-transition area SA2 is the sub-transition area at the upper left corner of the first display area DA1 as an example.
  • the coordinates of the first vertex V1 are (m1, n1), and the coordinates of the second vertex V2 are is (x1, y1).
  • the coordinates of the compensation pixel point CP' are set to (a2, b2).
  • the step S523 of obtaining the first weight value corresponding to the first reference gray scale and the second weight value corresponding to the second reference gray scale according to the coordinates of the pixel point to be compensated includes the following steps:
  • the first weight value is obtained according to the following formula:
  • k1 is the first weight value
  • b2 is the coordinate value of the pixel to be compensated on the first coordinate axis A1
  • a2 is the coordinate value of the pixel to be compensated on the second coordinate axis A2
  • n1 is the first vertex V1 on the first coordinate axis
  • m1 is the coordinate value of the first vertex V1 on the second coordinate axis A2;
  • y1 is the coordinate value of the second vertex V2 on the first coordinate axis A1;
  • x1 is the second vertex V2 on the The coordinate value on the two coordinate axis A2.
  • the second weight value is obtained according to the following formula:
  • k2 is the second weight value.
  • the plurality of sub-transition areas further include a third sub-transition area SA3, a fourth sub-transition area SA4, a fifth sub-transition area, and the first sub-transition area SA1 and the second sub-transition area SA2 arranged clockwise in sequence.
  • area SA5 sixth sub-transition area SA6, seventh sub-transition area SA7, and eighth sub-transition area SA8.
  • the third sub-transition area SA3, the fifth sub-transition area SA5, and the seventh sub-transition area SA7 are obtained according to the coordinates of the pixel point to be compensated.
  • the way of the second weight value of is similar to that in the first sub-transition area SA1.
  • the fourth sub-transition area SA4 the sixth sub-transition area SA6, and the eighth sub-transition area SA8, the first weight value corresponding to the first reference gray scale and the weight value corresponding to the second reference gray scale are obtained according to the coordinates of the pixel point to be compensated.
  • the manner of the corresponding second weight value is similar to that of the second sub-transition area SA2.
  • the step S524 of obtaining the third compensation gray scale according to the first reference gray scale, the second reference gray scale, the first weight value and the second weight value includes obtaining the third compensation gray scale according to the following formula:
  • Nc Nx1 ⁇ k1+ Nx2 ⁇ k2,
  • Nc is the third compensation gray scale
  • N x1 is the first reference gray scale
  • N x2 is the second reference gray scale
  • k1 is the first weight value
  • k2 is the second weight value.
  • the step S521 of obtaining the first reference gray scale according to the actual brightness of the pixel to be compensated and the first compensation algorithm includes obtaining the first reference gray scale according to the following formula:
  • N x1 N1 ⁇ (L aver1 /Ln) 1/Gamma1 ,
  • N x1 is the first reference gray scale
  • N1 is the gray scale of the pixel to be compensated before compensation under the first compensation algorithm
  • L aver1 is the compensation target brightness of the pixel to be compensated under the first compensation algorithm
  • Ln is the compensation target The actual brightness of the pixel
  • Gamma1 is the grayscale coefficient value (Gamma value) under the first compensation algorithm.
  • the gamma value Gamma1 is a known preset value.
  • the displayed grayscale N1 before compensation is the preset value within the range of grayscales that can be displayed by the display panel.
  • the display panel can display 256 grayscales.
  • Display gray scale N1 is 16.
  • the compensation target luminance L aver1 is the target luminance expected to be displayed by the pixels to be compensated at the gray scale N1 before compensation.
  • the compensation target brightness L aver1 is the gray scale N1 displayed by the pixels of the entire display panel before compensation.
  • the average luminance at the lower level, or the compensation target luminance L aver1 is the average luminance of a number of pixels adjacent to the pixel to be compensated before displaying the gray scale N1.
  • the compensation target brightness L aver1 is the average brightness of several pixels adjacent to the pixel to be compensated when the display panel displays a grayscale of 16. Therefore, when the configured first compensation algorithm has been determined, the first reference gray scale N x1 can be obtained according to the selected display gray scale N1 before compensation and the detected actual brightness Ln of the pixel to be compensated.
  • the first reference grayscale N x1 which is higher than the displayed grayscale N1 before compensation, can be calculated to compensate the brightness of the pixel to be compensated. to brighter.
  • the first reference grayscale N x1 When the actual luminance Ln of the pixel to be compensated is brighter than the compensation target luminance L aver1 , the first reference grayscale N x1 , whose value is lower than the displayed grayscale N1 before compensation, can be calculated to compensate the brightness of the pixel to be compensated. to darker.
  • the above example shows the calculation method of the first reference gray scale N x1 when the gray scale N1 before compensation is 16. According to the same principle, when the display panel can display 256 gray scales, it can be calculated that the gray scale N1 before compensation is 0 to The first reference grayscale N x1 of any grayscale in 255.
  • the step S522 of obtaining the first reference gray scale according to the coordinates of the pixel to be compensated, the actual brightness and the first compensation algorithm includes obtaining the first reference gray scale according to the following formula:
  • Nx2 N2 ⁇ ( Laver2 /Ln) 1/Gamma2 ,
  • N x2 is the second reference gray scale
  • N2 is the gray scale of the pixel to be compensated before compensation under the second compensation algorithm
  • L aver2 is the compensation target brightness of the pixel to be compensated under the second compensation algorithm
  • Ln is the compensation target The actual brightness of the pixel
  • Gamma2 is the gray scale coefficient value under the second compensation algorithm.
  • the displayed grayscale N2 before compensation is the preset value within the range of grayscales that can be displayed by the display panel. For example, the display panel can display 256 grayscales. Display gray scale N2 is 16.
  • the compensation target luminance L aver2 is the target luminance expected to be displayed by the pixels to be compensated at the gray scale N2 before compensation.
  • the compensation target brightness L aver2 is the gray scale N2 displayed by the pixels of the entire display panel before compensation.
  • the average luminance at the lower level, or the compensation target luminance L aver2 is the average luminance of several pixels adjacent to the pixel to be compensated at the display gray scale N2 before compensation.
  • the compensation target brightness L aver2 is the average brightness of several pixels adjacent to the pixel to be compensated when the display panel displays a grayscale of 16. Therefore, when the configured second compensation algorithm has been determined, the second reference gray scale N x2 can be obtained according to the selected display gray scale N2 before compensation and the detected actual brightness Ln of the pixel to be compensated.
  • the second reference grayscale N x2 which is higher than the displayed grayscale N2 before compensation, can be calculated to compensate the brightness of the pixel to be compensated. to brighter.
  • the second reference grayscale N x2 which is lower than the displayed grayscale N2 before compensation, can be calculated to compensate the brightness of the pixel to be compensated. to darker.
  • the above example shows the calculation method of the second reference gray scale N x2 when the gray scale N2 before compensation is 16. According to the same principle, when the display panel can display 256 gray scales, it can be calculated that the gray scale N2 before compensation is 0 to The second reference grayscale N x2 of any grayscale in 255.
  • the first display area DA1 is located in the central area of the display panel, and the second display area DA2 is located in the peripheral area of the display panel.
  • the first display area DA1 is compensated by an independent first compensation algorithm
  • the second display area DA2 is compensated by an independent second compensation algorithm.
  • the center area and edge area of the display panel are compensated separately to ensure that they can be adapted to the center area and edge area respectively.
  • a more suitable compensation algorithm for each area can avoid the color cast phenomenon in some areas caused by the same compensation algorithm for the entire display panel.
  • a transitional display area TA is set between the first display area DA1 and the second display area DA2, so that the compensation effect of the display panel is weighted and transitioned from the first display area DA1 to the second display area DA2, so as to realize the gradual change of the compensation weight and improve the compensation effect.
  • the display effect of the display panel is set between the first display area DA1 and the second display area DA2, so that the compensation effect of the display panel is weighted and transitioned from the first display area DA1 to the second display area DA2, so as to realize the gradual change of the compensation weight and improve the compensation effect.
  • the method for obtaining the third compensation gray scale Nc is not limited to this, and other weighting methods may also be used.
  • obtaining the third compensation grayscale according to the first reference grayscale, the second reference grayscale, the first weight value and the second weight value includes The third compensation gray scale is obtained according to the following formula:
  • Nc N1 ⁇ ((L aver1 ⁇ k1+L aver2 ⁇ k2)/Ln) 1/Gamma1 ,
  • Nc is the third compensation gray scale.
  • Nc N1 ⁇ (L aver1 /Ln) 1/(Gamma1 ⁇ k1+Gamma2 ⁇ k2) ,
  • Nc is the third compensation gray scale.
  • the compensation effect of the display panel can also be weighted and transitioned from the first display area DA1 to the second display area DA2, and the display effect of the compensated display panel can be improved.
  • an embodiment of the present invention also provides a grayscale compensation device for a display panel, which is used for grayscale compensation of the display panel.
  • the display panel includes a first display area, a second display area and a transitional display area arranged between the first display area and the second display area.
  • the grayscale compensation device may include a first compensation algorithm unit 110 , a second compensation algorithm unit 120 , a third compensation algorithm unit 130 and a compensation driving unit 140 .
  • the first compensation algorithm unit 110 is configured to configure the first compensation algorithm to the first display area, so that the first compensation gray scale of the first display area is obtained according to the first compensation algorithm.
  • the second compensation algorithm unit 120 is configured to configure the second compensation algorithm for the second display area, so that the second compensation gray scale of the second display area is obtained according to the second compensation algorithm.
  • the third compensation algorithm unit 130 is configured to configure a third compensation algorithm for the transition display area, so that the third compensation gray scale of the transition display area is obtained according to the third compensation algorithm.
  • the compensation driving unit 140 is configured to configure the display panel to display images according to the first compensation gray scale, the second compensation gray scale and the third compensation gray scale.
  • the grayscale compensation device further includes a coordinate system unit 150 and a brightness detection unit 160 .
  • the coordinate system unit 150 is used to establish a coordinate system of pixels on the display panel, so as to obtain the coordinates of the pixels to be compensated.
  • the brightness detection unit 160 can acquire the actual brightness of the pixel to be compensated.
  • the third compensation algorithm unit 130 can obtain the third compensation gray scale according to the coordinates of the pixel to be compensated, the actual brightness and the third compensation algorithm.
  • obtaining the third compensation gray scale according to the coordinates of the pixel to be compensated, the actual brightness and the third compensation algorithm includes: obtaining the first reference gray scale according to the actual brightness of the pixel to be compensated and the first compensation algorithm
  • the second reference gray scale is obtained according to the actual brightness of the pixel to be compensated and the second compensation algorithm
  • the first weight value corresponding to the first reference gray scale and the second reference gray scale are obtained according to the coordinates of the pixel to be compensated
  • the second weight value and the third compensation gray scale are obtained according to the first reference gray scale, the second reference gray scale, the first weight value, and the second weight value.
  • the first compensation algorithm is configured for the first display area
  • the second compensation algorithm is configured for the second display area
  • different display areas have independent compensation algorithms and compensation parameters, so that Avoid the color cast phenomenon in some areas caused by the same compensation algorithm for the entire display panel.
  • the third compensation algorithm is configured to the transitional display area, thereby alleviating the compensation difference between the first display area and the second display area, so that the compensated display between the first display area and the second display area There is a transition area in the effect, which improves the display effect of the display panel after compensation.
  • the embodiments of the present invention may provide a computer storage medium for implementation.
  • Computer program instructions are stored on the computer storage medium.
  • any gray scale compensation method in the foregoing embodiments may be implemented.

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Abstract

本申请提供一种显示面板的灰阶补偿方法及其装置。显示面板的灰阶补偿方法包括：在显示面板的显示区划分为第一显示区、第二显示区及设置于第一显示区和第二显示区之间的过渡显示区；向第一显示区配置第一补偿算法，使得第一显示区的第一补偿灰阶根据第一补偿算法得到，向第二显示区配置与第一补偿算法不同的第二补偿算法，使得第二显示区的第二补偿灰阶根据第二补偿算法得到，向过渡显示区配置与第一补偿算法和第二补偿算法均不同的第三补偿算法，使得过渡显示区的第三补偿灰阶根据第三补偿算法得到；以及将显示面板配置为根据第一补偿灰阶、第二补偿灰阶以及第三补偿灰阶显示画面。根据本发明实施例的显示面板的灰阶补偿方法，第一显示区和第二显示区之间在补偿后的显示效果存在过渡区域，提高补偿后显示面板的显示效果。

Description

显示面板的灰阶补偿方法及其装置
相关申请的交叉引用
本申请要求享有于2021年05月31日提交的名称为“显示面板的灰阶补偿方法”的中国专利申请第202110602514.4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，具体涉及一种显示面板的灰阶补偿方法及其装置。
背景技术
有机发光二极管(Organic Light Emitting Diode，OLED)显示面板存在显示亮度均匀性问题，即OLED显示面板常产生亮度显示不均(mura)的现象。补偿亮度显示不均的方法分为内部补偿和外部补偿，其中外部补偿的方法是指通过外部的驱动电路或设备感知像素的电学或光学特性，然后进行补偿的方法。由于外部补偿时光学抽取的方式具有结构简单、方法灵活的优点，现阶段被广泛采用。
现有对显示面板的补偿方式，补偿后的显示面板存在部分区域偏色现象，补偿效果不佳。
发明内容
本申请提供一种显示面板的灰阶补偿方法及其装置，以提高补偿后显示面板的显示效果。
第一方面，本申请实施例提供了一种显示面板的灰阶补偿方法，其包括：在显示面板的显示区划分为第一显示区、第二显示区及设置于第一显示区与第二显示区之间的过渡显示区；向第一显示区配置第一补偿算法， 使得第一显示区的第一补偿灰阶根据第一补偿算法得到，向第二显示区配置与第一补偿算法不同的第二补偿算法，使得第二显示区的第二补偿灰阶根据第二补偿算法得到，向过渡显示区配置与第一补偿算法和第二补偿算法均不同的第三补偿算法，使得过渡显示区的第三补偿灰阶根据第三补偿算法得到；以及将显示面板配置为根据第一补偿灰阶、第二补偿灰阶以及第三补偿灰阶显示画面。
第二方面，本申请实施例提供一种显示面板的灰阶补偿装置，用于对显示面板进行灰阶补偿，显示面板包括第一显示区、第二显示区以及设置于第一显示区和第二显示区之间的过渡显示区，显示面板的灰阶补偿装置包括：第一补偿算法单元，用于向第一显示区配置第一补偿算法，使得第一显示区的第一补偿灰阶根据第一补偿算法得到；第二补偿算法单元，用于向第二显示区配置第二补偿算法，使得第二显示区的第二补偿灰阶根据第二补偿算法得到；第三补偿算法单元，用于向过渡显示区配置第三补偿算法，使得过渡显示区的第三补偿灰阶根据第三补偿算法得到；补偿驱动单元，用于将显示面板配置为根据第一补偿灰阶、第二补偿灰阶以及第三补偿灰阶显示画面。
本申请实施例的显示面板的灰阶补偿方法及其装置，向第一显示区配置第一补偿算法，向第二显示区配置第二补偿算法，不同显示区分别具有独立的补偿算法和补偿参数，从而避免整个显示面板采用同一补偿算法带来的部分区域偏色现象。本发明实施例中，在显示面板的第一显示区与第二显示区之间设置过渡显示区，并且向过渡显示区配置第三补偿算法，从而缓解第一显示区与第二显示区之间的补偿差异，使得第一显示区和第二显示区之间在补偿后的显示效果存在过渡区域，提高补偿后显示面板的显示效果。
附图说明
图1是本申请一个实施例提供的显示面板的灰阶补偿方法的流程图；
图2是本申请一个实施例提供的显示面板的灰阶补偿方法中向过渡显示区配置第三补偿算法步骤的流程图；
图3是本申请一个实施例提供的显示面板的灰阶补偿方法中根据待补偿像素点的坐标、实际亮度以及第三补偿算法得到第三补偿灰阶步骤的流程图；
图4是本申请一个实施例提供的显示面板的灰阶补偿方法中显示面板的结构示意图；及
图5是本申请一个实施例提供的显示面板的灰阶补偿装置的结构框图。
具体实施方式
本申请实施例提供一种灰阶补偿方法，用于对显示面板进行灰阶补偿，显示面板可以是有机发光二极管(Organic Light Emitting Diode，OLED)显示面板，在一些实施例中，显示面板也可以是液晶显示面板(Liquid Crystal Display，LCD)、利用微发光二极管(Micro-LED)、发光二极管(Light Emitting Diode，LED)器件的显示面板等。
为了更好地理解本申请，下面结合图1至图5对本申请实施方式提供的显示面板的灰阶补偿方法进行详细描述。
图1示出本申请一个实施例提供的显示面板的灰阶补偿方法的流程图，本实施例的显示面板的灰阶补偿方法包括以下步骤。
在显示面板上建立像素点的坐标系。
显示面板包括排布于显示区的多个子像素，每个子像素能够显示一种颜色，多个子像素例如是包括红色子像素、绿色子像素以及蓝色子像素。本文中，像素点指子像素。将显示面板的显示区划分为第一显示区、第二显示区以及设置于第一显示区与第二显示区之间的过渡显示区。
向第一显示区配置第一补偿算法，使得第一显示区的第一补偿灰阶根据第一补偿算法得到，向第二显示区配置与第一补偿算法不同的第二补偿算法，使得第二显示区的第二补偿灰阶根据第二补偿算法得到，向过渡显示区配置与第一补偿算法和第二补偿算法均不同的第三补偿算法，使得过渡显示区的第三补偿灰阶根据第三补偿算法得到。
将显示面板配置为根据第一补偿灰阶、第二补偿灰阶以及第三补偿灰阶显示画面。
根据本申请实施例提供的显示面板的灰阶补偿方法，向第一显示区配置第一补偿算法，向第二显示区配置第二补偿算法，不同显示区分别具有独立的补偿算法和补偿参数，从而避免整个显示面板采用同一补偿算法带来的部分区域偏色现象。本发明实施例中，在显示面板的第一显示区与第二显示区之间设置过渡显示区，并且向过渡显示区配置第三补偿算法，从而缓解第一显示区与第二显示区之间的补偿差异，使得第一显示区和第二显示区之间在补偿后的显示效果存在过渡区域，提高补偿后显示面板的显示效果。
图2示出本申请一个实施例提供的显示面板的灰阶补偿方法中向过渡显示区配置第三补偿算法步骤的流程图，所述步骤分别向第一显示区、第二显示区和过渡显示区配置互不相同的第一补偿算法、第二补偿算法和第三补偿算法，使得第一显示区的第一补偿灰阶根据第一补偿算法得到、第二显示区的第二补偿灰阶根据第二补偿算法得到、过渡显示区的第三补偿灰阶根据第三补偿算法得到还包括：
获取待补偿像素点的坐标和实际亮度。
根据待补偿像素点的坐标、实际亮度以及第三补偿算法得到第三补偿灰阶。
图3示出本申请一个实施例提供的显示面板的灰阶补偿方法中根据待补偿像素点的坐标、实际亮度以及第三补偿算法得到第三补偿灰阶步骤的流程图，所述步骤根据待补偿像素点的坐标、实际亮度以及第三补偿算法得到第三补偿灰阶还包括
根据待补偿像素点的实际亮度以及第一补偿算法得到第一参考灰阶。
根据待补偿像素点的实际亮度以及第二补偿算法得到第二参考灰阶。
根据待补偿像素点的坐标获得与第一参考灰阶对应的第一权重值以及与第二参考灰阶对应的第二权重值。
根据第一参考灰阶、第二参考灰阶、第一权重值以及第二权重值得到第三补偿灰阶。
参阅图4，第一显示区DA1呈矩形，过渡显示区TA呈矩形环状并围绕于第一显示区DA1的外周，第二显示区DA2围绕于过渡显示区TA的外 周。第一显示区DA1在显示面板中处于中心区域，第二显示区DA2在显示面板中处于边缘区域。显示面板的中心区域和边缘区域分开补偿，保证可以向中心区域和边缘区域分别适配各自区域更合适的补偿算法，一定程度缓解显示面板的边缘区域在补偿后的偏色现象。
坐标系包括相互垂直的第一坐标轴A1和第二坐标轴A2。第一坐标轴A1与第一显示区DA1的一对边平行，第二坐标轴A2与第一显示区DA1的另一对边平行。本实施例中，显示面板中多个像素点阵列排布，第一坐标轴A1例如是平行于像素点排布结构的行方向，第二坐标轴A2例如是平行于像素点排布结构的列方向。此时，像素点沿第一坐标轴A1的坐标代表像素点在像素点排布结构中位于哪列，像素点沿第二坐标轴A2的坐标代表像素点在像素点排布结构中位于哪行。
由于过渡显示区TA呈矩形环状而包括与第一显示区DA1相邻的矩形状的内边界以及与第二显示区DA2相邻的矩形状的外边界。可选地，设置过渡显示区TA内边界的四个顶点的坐标分别为(m1，n1)、(m1，n2)、(m2，n1)、(m2，n2)，m1、m2为顶点或像素点沿第二坐标轴A2的坐标值，也即顶点或像素点所在的行数；n1、n2为顶点或像素点沿第一坐标轴A1的坐标值，也即顶点或像素点所在的列数。在本实施例中，设置过渡显示区TA外边界的四个顶点的坐标分别为(x1，y1)、(x1，y2)、(x2，y1)、(x2，y2)，x1、x2为顶点或像素点沿第二坐标轴A2的坐标值，也即顶点或像素点所在的行数；y1、y2为顶点或像素点沿第一坐标轴A1的坐标值，也即顶点或像素点所在的列数。
过渡显示区TA包括多个子过渡区，每个子过渡区呈矩形。多个子过渡区由第一显示区DA1的多个边的延长线与第二显示区DA2的内边界相交而将过渡显示区TA划分形成。
第一权重值的大小与待补偿像素点到第一显示区的距离负相关，第二权重值的大小与待补偿像素点到第二显示区的距离负相关。因此，过渡显示区中的待补偿像素点越靠近第一显示区时补偿效果越接近第一显示区中像素点的补偿效果，过渡显示区中的待补偿像素点越靠近第二显示区时补偿效果越接近第二显示区中像素点的补偿效果，使得显示面板的补偿效果 从第一显示区向第二显示区加权过渡，提高补偿后显示面板的显示效果。
继续参阅图4，多个子过渡区包括在平行于第一坐标轴A1的方向上位于第一显示区DA1与第二显示区DA2之间的第一子过渡区SA1。或者说，第一显示区DA1、第一子过渡区SA1与第二显示区DA2沿第一方向排列。第一子过渡区SA1包括相对的第一边E1和第二边E2，第一边E1与第一显示区DA1的一条边重合，第二边E2与第二显示区DA2的一条边重合。本实施例中，以第一子过渡区SA1是第一显示区DA1左侧的子过渡区为例进行说明，其第一边E1在第一坐标轴A1上的坐标值为n1，第二边E2在第一坐标轴A1上的坐标值为y1。
在第一子过渡区SA1中，补偿像素点CP的坐标设置为(a1，b1)。在第一子过渡区SA1中，根据待补偿像素点的坐标获得与第一参考灰阶对应的第一权重值以及与第二参考灰阶对应的第二权重值的步骤S523包括以下步骤：
根据以下公式得到第一权重值：
k1＝(b1-y1)/(n1-y1)，
k1为第一权重值；b1为待补偿像素点在第一坐标轴A1上的坐标值；n1为第一边E1在第一坐标轴A1上的坐标值；y1为第二边E2在第一坐标轴A1上的坐标值。
根据以下公式得到第二权重值：
k2＝1-k1，
k2为第二权重值。
至此，得到在第一子过渡区SA1中待补偿像素点的第一权重值k1和第二权重值k2。
多个子过渡区包括第二子过渡区SA2，第二子过渡区SA2包括相对的第一顶点V1和第二顶点V2，第一顶点V1与第一显示区DA1的一个顶点重合，第二顶点V2为过渡显示区TA的一个顶点。本实施例中，以第二子过渡区SA2是第一显示区DA1左上角处的子过渡区为例进行说明，其第一顶点V1的坐标为(m1，n1)，第二顶点V2的坐标为(x1，y1)。
在第二子过渡区SA2中，补偿像素点CP’的坐标设置为(a2，b2)。 在第二子过渡区SA2中，根据待补偿像素点的坐标获得与第一参考灰阶对应的第一权重值以及与第二参考灰阶对应的第二权重值的步骤S523包括以下步骤：
根据以下公式得到第一权重值：
Figure PCTCN2021137381-appb-000001
若k1＞1，则将k1校正为等于1，
k1为第一权重值；b2为待补偿像素点在第一坐标轴A1上的坐标值；a2为待补偿像素点在第二坐标轴A2上的坐标值；n1为第一顶点V1在第一坐标轴A1上的坐标值；m1为第一顶点V1在第二坐标轴A2上的坐标值；y1为第二顶点V2在第一坐标轴A1上的坐标值；x1为第二顶点V2在第二坐标轴A2上的坐标值。
根据以下公式得到第二权重值：
k2＝1-k1，
k2为第二权重值。
至此，得到在第二子过渡区SA2中待补偿像素点的第一权重值k1和第二权重值k2。
本实施例中，多个子过渡区还包括与第一子过渡区SA1和第二子过渡区SA2沿顺时针方向依次设置的第三子过渡区SA3、第四子过渡区SA4、第五子过渡区SA5、第六子过渡区SA6、第七子过渡区SA7、第八子过渡区SA8。第三子过渡区SA3、第五子过渡区SA5、第七子过渡区SA7中，根据待补偿像素点的坐标获得与第一参考灰阶对应的第一权重值以及与第二参考灰阶对应的第二权重值的方式与在第一子过渡区SA1中的方式类似。在第四子过渡区SA4、第六子过渡区SA6、第八子过渡区SA8中，根据待补偿像素点的坐标获得与第一参考灰阶对应的第一权重值以及与第二参考灰阶对应的第二权重值的方式与在第二子过渡区SA2中的方式类似。
在一些实施例中，根据第一参考灰阶、第二参考灰阶、第一权重值以及第二权重值得到第三补偿灰阶的步骤S524包括根据以下公式得到第三补偿灰阶：
Nc＝N x1×k1+N x2×k2，
Nc为第三补偿灰阶；N x1为第一参考灰阶；N x2为第二参考灰阶；k1为第一权重值；k2为第二权重值。
在一些实施例中，根据待补偿像素点的实际亮度以及第一补偿算法得到第一参考灰阶的步骤S521包括根据以下公式得到第一参考灰阶：
N x1＝N1×(L aver1/Ln) 1/Gamma1，
N x1为第一参考灰阶；N1为待补偿像素点在第一补偿算法下的补偿前显示灰阶；L aver1为待补偿像素点在第一补偿算法下的补偿目标亮度；Ln为待补偿像素点的实际亮度；Gamma1为第一补偿算法下灰阶系数值(Gamma值)。
当被配置的第一补偿算法已经确定时，灰阶系数值Gamma1为已经得知的预设值。补偿前显示灰阶N1为显示面板可显示灰阶范围内的预设值，例如显示面板可显示256个灰阶，当需要对待补偿像素点在16灰阶下的亮度进行补偿时，则补偿前显示灰阶N1为16。在补偿前显示灰阶N1确定后，待补偿像素点的实际亮度Ln可以通过光学组件获得。补偿目标亮度L aver1为待补偿像素点在该补偿前显示灰阶N1下期望显示的目标亮度，在本实施例中，补偿目标亮度L aver1为整个显示面板的像素点在补偿前显示灰阶N1下的平均亮度，或者补偿目标亮度L aver1为与待补偿像素点邻近的若干像素点在补偿前显示灰阶N1下的平均亮度。
例如，当补偿前显示灰阶N1确定为16时，补偿目标亮度L aver1为显示面板显示16灰阶时，与待补偿像素点邻近的若干像素点的平均亮度。因此，被配置的第一补偿算法已经确定时，根据选定的补偿前显示灰阶N1以及检测到待补偿像素点的实际亮度Ln，可以得到第一参考灰阶N x1。当待补偿像素点的实际亮度Ln相对补偿目标亮度L aver1偏暗时，可以计算得到数值比补偿前显示灰阶N1更高的第一参考灰阶N x1，以便将待补偿像素点的亮度补偿至更亮。当待补偿像素点的实际亮度Ln相对补偿目标亮度L aver1偏亮时，可以计算得到数值比补偿前显示灰阶N1更低的第一参考灰阶N x1，以便将待补偿像素点的亮度补偿至更暗。前文示例了补偿前显示灰阶N1为16时第一参考灰阶N x1的计算方式，根据相同的原理，当显示面板可显示256个灰阶时，可以计算补偿前显示灰阶N1为0至255中任意灰阶的第一 参考灰阶N x1。
在一些实施例中，根据待补偿像素点的坐标、实际亮度以及第一补偿算法得到第一参考灰阶的步骤S522包括根据以下公式得到第一参考灰阶：
N x2＝N2×(L aver2/Ln) 1/Gamma2，
N x2为第二参考灰阶；N2为待补偿像素点在第二补偿算法下的补偿前显示灰阶；L aver2为待补偿像素点在第二补偿算法下的补偿目标亮度；Ln为待补偿像素点的实际亮度；Gamma2为第二补偿算法下灰阶系数值。当被配置的第一补偿算法已经确定时，灰阶系数值Gamma2为已经得知的预设值。补偿前显示灰阶N2为显示面板可显示灰阶范围内的预设值，例如显示面板可显示256个灰阶，当需要对待补偿像素点在16灰阶下的亮度进行补偿时，则补偿前显示灰阶N2为16。在补偿前显示灰阶N2确定后，待补偿像素点的实际亮度Ln可以通过光学组件获得。补偿目标亮度L aver2为待补偿像素点在该补偿前显示灰阶N2下期望显示的目标亮度，在本实施例中，补偿目标亮度L aver2为整个显示面板的像素点在补偿前显示灰阶N2下的平均亮度，或者补偿目标亮度L aver2为与待补偿像素点邻近的若干像素点在补偿前显示灰阶N2下的平均亮度。例如，当补偿前显示灰阶N2确定为16时，补偿目标亮度L aver2为显示面板显示16灰阶时，与待补偿像素点邻近的若干像素点的平均亮度。因此，被配置的第二补偿算法已经确定时，根据选定的补偿前显示灰阶N2以及检测到待补偿像素点的实际亮度Ln，可以得到第二参考灰阶N x2。当待补偿像素点的实际亮度Ln相对补偿目标亮度L aver2偏暗时，可以计算得到数值比补偿前显示灰阶N2更高的第二参考灰阶N x2，以便将待补偿像素点的亮度补偿至更亮。当待补偿像素点的实际亮度Ln相对补偿目标亮度L aver2偏亮时，可以计算得到数值比补偿前显示灰阶N2更低的第二参考灰阶N x2，以便将待补偿像素点的亮度补偿至更暗。前文示例了补偿前显示灰阶N2为16时第二参考灰阶N x2的计算方式，根据相同的原理，当显示面板可显示256个灰阶时，可以计算补偿前显示灰阶N2为0至255中任意灰阶的第二参考灰阶N x2。
在上述实施例中，第一显示区DA1在显示面板中处于中心区域，第二显示区DA2在显示面板中处于边缘区域。第一显示区DA1采用独立的第 一补偿算法补偿，第二显示区DA2采用独立的第二补偿算法补偿，显示面板的中心区域和边缘区域分开补偿，保证可以向中心区域和边缘区域分别适配各自区域更合适的补偿算法，避免整个显示面板采用同一补偿算法带来的部分区域偏色现象。在第一显示区DA1与第二显示区DA2之间设置过渡显示区TA，使得显示面板的补偿效果从第一显示区DA1向第二显示区DA2加权过渡，实现补偿权重的渐变，提高补偿后显示面板的显示效果。
在上述实施例中，根据第一权重值k1以及第二权重值k2后，通过公式Nc＝N x1×k1+N x2×k2得到第三补偿灰阶Nc。然而得到第三补偿灰阶Nc的方式不限于此，也可以是其它加权方式。
例如，在一个替代实施例中，N1＝N2且Gamma1＝Gamma2，可选地，根据第一参考灰阶、第二参考灰阶、第一权重值以及第二权重值得到第三补偿灰阶包括根据以下公式得到第三补偿灰阶：
Nc＝N1×((L aver1×k1+L aver2×k2)/Ln) 1/Gamma1，
Nc为第三补偿灰阶。
例如，在另一个替代的实施例中，N1＝N2且L aver1＝L aver2，可选地，根据第一参考灰阶、第二参考灰阶、第一权重值以及第二权重值得到第三补偿灰阶包括根据以下公式得到第三补偿灰阶：
Nc＝N1×(L aver1/Ln) 1/(Gamma1×k1+Gamma2×k2)，
Nc为第三补偿灰阶。
上述一些替代的实施例中，通过设置不同的加权方式，同样可以实现显示面板的补偿效果从第一显示区DA1向第二显示区DA2加权过渡，提高补偿后显示面板的显示效果。
参阅图5，本发明实施例还提供一种显示面板的灰阶补偿装置，用于显示面板的灰阶补偿。该显示面板包括第一显示区、第二显示区以及设置在第一显示区与第二显示区之间过渡显示区。该灰阶补偿装置可以包括第一补偿算法单元110、第二补偿算法单元120、第三补偿算法单元130以及补偿驱动单元140。
第一补偿算法单元110用于向第一显示区配置第一补偿算法，使得第一显示区的第一补偿灰阶根据第一补偿算法得到。第二补偿算法单元120 用于向第二显示区配置第二补偿算法，使得第二显示区的第二补偿灰阶根据第二补偿算法得到。第三补偿算法单元130用于向过渡显示区配置第三补偿算法，使得过渡显示区的第三补偿灰阶根据第三补偿算法得到。补偿驱动单元140用于将显示面板配置为根据第一补偿灰阶、第二补偿灰阶以及第三补偿灰阶显示画面。
在一些实施例中，灰阶补偿装置还包括坐标系单元150、亮度检测单元160。坐标系单元150用于在显示面板上建立像素点的坐标系，从而获取待补偿像素点的坐标。亮度检测单元160能够获取待补偿像素点的实际亮度。此时，第三补偿算法单元130能够根据待补偿像素点的坐标、实际亮度以及第三补偿算法得到第三补偿灰阶。具体地，在一些实施例中，根据待补偿像素点的坐标、实际亮度以及第三补偿算法得到第三补偿灰阶包括：根据待补偿像素点的实际亮度以及第一补偿算法得到第一参考灰阶；根据待补偿像素点的实际亮度以及第二补偿算法得到第二参考灰阶；根据待补偿像素点的坐标获得与第一参考灰阶对应的第一权重值以及与第二参考灰阶对应的第二权重值以及根据第一参考灰阶、第二参考灰阶、第一权重值以及第二权重值得到第三补偿灰阶。
根据本发明实施例的显示面板的灰阶补偿装置，向第一显示区配置第一补偿算法，向第二显示区配置第二补偿算法，不同显示区分别具有独立的补偿算法和补偿参数，从而避免整个显示面板采用同一补偿算法带来的部分区域偏色现象。本发明实施例中，向过渡显示区配置第三补偿算法，从而缓解第一显示区与第二显示区之间的补偿差异，使得第一显示区和第二显示区之间在补偿后的显示效果存在过渡区域，提高补偿后显示面板的显示效果。
另外，结合全文实施例中的灰阶补偿方法，本发明实施例可提供一种计算机存储介质来实现。该计算机存储介质上存储有计算机程序指令。该计算机程序指令被处理器执行时实现上述实施例中的任意一种灰阶补偿方法。
本领域技术人员应能理解，上述实施例均是示例性而非限制性的。在不同实施例中出现的不同技术特征可以进行组合，以取得有益效果。本领 域技术人员在研究附图、说明书及权利要求书的基础上，应能理解并实现所揭示的实施例的其他变化的实施例。

Claims (15)

  1. 一种显示面板的灰阶补偿方法，包括：
    将显示面板的显示区划分为第一显示区、第二显示区及设置于所述第一显示区与所述第二显示区之间的过渡显示区；
    向所述第一显示区配置第一补偿算法，使得所述第一显示区的第一补偿灰阶根据所述第一补偿算法得到，向所述第二显示区配置与所述第一补偿算法不同的第二补偿算法，使得所述第二显示区的第二补偿灰阶根据所述第二补偿算法得到，向所述过渡显示区配置与所述第一补偿算法和所述第二补偿算法均不同的第三补偿算法，使得所述过渡显示区的第三补偿灰阶根据所述第三补偿算法得到；以及
    将所述显示面板配置为根据所述第一补偿灰阶、所述第二补偿灰阶以及所述第三补偿灰阶显示画面。
  2. 根据权利要求1所述的显示面板的灰阶补偿方法，其中，还包括：
    在所述显示面板上建立像素点的坐标系。
  3. 根据权利要求2所述的显示面板的灰阶补偿方法，其中，所述向所述过渡显示区配置第三补偿算法，使得所述过渡显示区的第三补偿灰阶根据所述第三补偿算法得到包括：
    获取待补偿像素点的坐标和实际亮度；以及
    根据所述待补偿像素点的坐标、实际亮度以及所述第三补偿算法得到所述第三补偿灰阶。
  4. 根据权利要求3所述的显示面板的灰阶补偿方法，其中，所述根据所述待补偿像素点的坐标、实际亮度以及所述第三补偿算法得到所述第三补偿灰阶包括：
    根据所述待补偿像素点的实际亮度以及所述第一补偿算法得到第一参考灰阶；
    根据所述待补偿像素点的实际亮度以及所述第二补偿算法得到第二参考灰阶；
    根据所述待补偿像素点的坐标获得与所述第一参考灰阶对应的第一权 重值以及与所述第二参考灰阶对应的第二权重值；以及
    根据所述第一参考灰阶、所述第二参考灰阶、所述第一权重值以及所述第二权重值得到所述第三补偿灰阶。
  5. 根据权利要求4所述的显示面板的灰阶补偿方法，其中，
    根据所述第一参考灰阶、所述第二参考灰阶、所述第一权重值以及所述第二权重值得到所述第三补偿灰阶包括根据以下公式得到所述第三补偿灰阶：
    Nc＝N x1×k1+N x2×k2，
    其中，Nc为所述第三补偿灰阶；N x1为所述第一参考灰阶；N x2为所述第二参考灰阶；k1为所述第一权重值；k2为所述第二权重值。
  6. 根据权利要求4所述的显示面板的灰阶补偿方法，其中，所述第一权重值的大小与所述待补偿像素点到所述第一显示区的距离负相关，所述第二权重值的大小与所述待补偿像素点到所述第二显示区的距离负相关。
  7. 根据权利要求4所述的显示面板的灰阶补偿方法，其中，所述第一显示区呈矩形，所述过渡显示区呈矩形环状并围绕于所述第一显示区的外周，所述第二显示区围绕于所述过渡显示区的外周。
  8. 根据权利要求7所述的显示面板的灰阶补偿方法，其中，所述坐标系包括相互垂直的第一坐标轴和第二坐标轴，所述第一坐标轴与所述第一显示区的一对边平行，所述第二坐标轴与所述第一显示区的另一对边平行，所述过渡显示区包括多个子过渡区，每个所述子过渡区呈矩形。
  9. 根据权利要求8所述的显示面板的灰阶补偿方法，其中，所述多个子过渡区包括在平行于所述第一坐标轴的方向上位于所述第一显示区与所述第二显示区之间的第一子过渡区，所述第一子过渡区包括相对的第一边和第二边，所述第一边与所述第一显示区的一条边重合，所述第二边与所述第二显示区的一条边重合，
    在所述第一子过渡区中，所述根据所述待补偿像素点的坐标获得与所述第一参考灰阶对应的第一权重值以及与所述第二参考灰阶对应的第二权重值包括：
    根据以下公式得到所述第一权重值：
    k1＝(b1-y1)/(n1-y1)，
    其中，k1为所述第一权重值；b1为所述待补偿像素点在所述第一坐标轴上的坐标值；n1为所述第一边在所述第一坐标轴上的坐标值；y1为所述第二边在所述第一坐标轴上的坐标值，
    根据以下公式得到所述第二权重值：
    k2＝1-k1，
    其中，k2为所述第二权重值。
  10. 根据权利要求8所述的显示面板的灰阶补偿方法，其中，所述多个子过渡区包括第二子过渡区，所述第二子过渡区包括相对的第一顶点和第二顶点，所述第一顶点与所述第一显示区的一个顶点重合，所述第二顶点为所述过渡显示区的一个顶点，
    在所述第二子过渡区中，所述根据所述待补偿像素点的坐标获得与所述第一参考灰阶对应的第一权重值以及与所述第二参考灰阶对应的第二权重值包括：
    根据以下公式得到所述第一权重值：
    Figure PCTCN2021137381-appb-100001
    若k1＞1，则将k1校正为等于1，
    其中，k1为所述第一权重值；b2为所述待补偿像素点在所述第一坐标轴上的坐标值；a2为所述待补偿像素点在所述第二坐标轴上的坐标值；n1为所述第一顶点在所述第一坐标轴上的坐标值；m1为所述第一顶点在所述第二坐标轴上的坐标值；y1为所述第二顶点在所述第一坐标轴上的坐标值；x1为所述第二顶点在所述第二坐标轴上的坐标值，
    根据以下公式得到所述第二权重值：
    k2＝1-k1，
    其中，k2为所述第二权重值。
  11. 根据权利要求4所述的显示面板的灰阶补偿方法，其中，所述根据所述待补偿像素点的实际亮度以及所述第一补偿算法得到第一参考灰阶包括根据以下公式得到所述第一参考灰阶：
    N x1＝N1×(L aver1/Ln) 1/Gamma1，
    其中，N x1为所述第一参考灰阶；N1为所述待补偿像素点在所述第一补偿算法下的补偿前显示灰阶；L aver1为所述待补偿像素点在所述第一补偿算法下的补偿目标亮度；Ln为所述待补偿像素点的实际亮度；Gamma1为所述第一补偿算法下灰阶系数值，
    所述根据所述待补偿像素点的坐标、实际亮度以及所述第一补偿算法得到第一参考灰阶包括：
    根据以下公式得到所述第一参考灰阶：
    N x2＝N2×(L aver2/Ln) 1/Gamma2，
    其中，N x2为所述第二参考灰阶；N2为所述待补偿像素点在所述第二补偿算法下的补偿前显示灰阶；L aver2为所述待补偿像素点在所述第二补偿算法下的补偿目标亮度；Ln为所述待补偿像素点的实际亮度；Gamma2为所述第二补偿算法下灰阶系数值。
  12. 根据权利要求11所述的显示面板的灰阶补偿方法，其中，N1＝N2且Gamma1＝Gamma2，
    根据所述第一参考灰阶、所述第二参考灰阶、所述第一权重值以及所述第二权重值得到所述第三补偿灰阶包括：
    根据以下公式得到所述第三补偿灰阶：
    Nc＝N1×((L aver1×k1+L aver2×k2)/Ln) 1/Gamma1，
    其中，Nc为所述第三补偿灰阶。
  13. 根据权利要求11所述的显示面板的灰阶补偿方法，其中，N1＝N2且L aver1＝L aver2，
    根据所述第一参考灰阶、所述第二参考灰阶、所述第一权重值以及所述第二权重值得到所述第三补偿灰阶包括：
    根据以下公式得到所述第三补偿灰阶：
    Nc＝N1×(L aver1/Ln) 1/(Gamma1×k1+Gamma2×k2)，
    其中，Nc为所述第三补偿灰阶。
  14. 一种显示面板的灰阶补偿装置，用于对显示面板进行灰阶补偿，所述显示面板包括第一显示区、第二显示区以及设置于所述第一显示区和所述第二显示区之间的过渡显示区，所述显示面板的灰阶补偿装置包括：
    第一补偿算法单元，用于向所述第一显示区配置第一补偿算法，使得所述第一显示区的第一补偿灰阶根据所述第一补偿算法得到；
    第二补偿算法单元，用于向所述第二显示区配置第二补偿算法，使得所述第二显示区的第二补偿灰阶根据所述第二补偿算法得到；
    第三补偿算法单元，用于向所述过渡显示区配置第三补偿算法，使得所述过渡显示区的第三补偿灰阶根据所述第三补偿算法得到；
    补偿驱动单元，用于将所述显示面板配置为根据所述第一补偿灰阶、所述第二补偿灰阶以及所述第三补偿灰阶显示画面。
  15. 根据权利要求14所述的灰阶补偿装置，其中，所述灰阶补偿装置还包括：
    坐标系单元，用于在所述显示面板上建立像素点的坐标系，以获取待补偿像素点的坐标；
    亮度检测单元，用于获取待补偿像素点的实际亮度，以使所述第三补偿算法单元根据所述待补偿像素点的坐标、实际亮度以及所述第三补偿算法得到所述第三补偿灰阶。
PCT/CN2021/137381 2021-05-31 2021-12-13 显示面板的灰阶补偿方法及其装置 WO2022252555A1 (zh)

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