WO2024000887A1 - 显示补偿方法、装置、设备、介质及显示装置 - Google Patents

显示补偿方法、装置、设备、介质及显示装置 Download PDF

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Publication number
WO2024000887A1
WO2024000887A1 PCT/CN2022/122281 CN2022122281W WO2024000887A1 WO 2024000887 A1 WO2024000887 A1 WO 2024000887A1 CN 2022122281 W CN2022122281 W CN 2022122281W WO 2024000887 A1 WO2024000887 A1 WO 2024000887A1
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Prior art keywords
brightness
target
gray level
consistent
trend
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PCT/CN2022/122281
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English (en)
French (fr)
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王洪宇
韩冲
李双佳
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昆山国显光电有限公司
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Publication of WO2024000887A1 publication Critical patent/WO2024000887A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/2003Display of colours
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen

Definitions

  • the present application belongs to the field of display technology, and in particular relates to a display compensation method, device, equipment, medium and display device.
  • Embodiments of the present application provide a display compensation method, device, equipment, medium and display device, which can improve the uniformity of the display panel.
  • embodiments of the present application provide a display compensation method, which includes: obtaining brightness parameters of more than two target grayscales in a full grayscale of a display panel, and determining, based on the brightness parameters, a target grayscale with a consistent brightness trend and a brightness trend.
  • Inconsistent target grayscales based on the target grayscales with consistent brightness trends and target grayscales with inconsistent brightness trends, determine the consistent brightness trend interval for all grayscales; use the Demura compensation algorithm for the target grayscales in the full grayscales of the display panel , calculate the Demura compensation coefficient; for the target gray level of the display panel located in the consistent brightness trend range, use the uniformity compensation algorithm to calculate the uniformity compensation coefficient; write the Demura compensation coefficient and the uniformity compensation coefficient into the driver integrated circuit to The driver integrated circuit reads the Demura compensation coefficient and the uniformity compensation coefficient to compensate according to the displayed gray scale.
  • embodiments of the present application provide a display compensation method, which is applied to a driving integrated circuit in a display device.
  • the driving integrated circuit stores the Demura compensation coefficient and the uniformity compensation coefficient obtained by the display compensation method in the first aspect.
  • This method Including: determining the displayed gray scale based on the display signal; when the displayed gray scale includes a gray scale located in a consistent brightness trend interval, reading the stored Demura compensation coefficient and uniformity compensation coefficient, and based on the displayed gray scale, The Demura compensation coefficient and the uniformity compensation coefficient compensate the display signal; when the displayed gray scale does not include the gray scale located in the consistent interval of the brightness trend, read the stored Demura compensation coefficient, and compensate according to the displayed gray scale and Demura compensation The coefficients compensate the display signal.
  • embodiments of the present application provide a display compensation device, including: a consistency determination module, used to obtain brightness parameters of more than two target grayscales in the full grayscale of the display panel, and determine that the brightness trends are consistent based on the brightness parameters.
  • the target gray level is inconsistent with the brightness trend;
  • the interval determination module is used to determine the brightness trend consistent interval of the full gray scale based on the target gray level with consistent brightness trend and the target gray level with inconsistent brightness trend;
  • first calculation The module is used to calculate the Demura compensation coefficient for the target gray level in the full gray level of the display panel using the Demura compensation algorithm;
  • the second calculation module is used to calculate the Demura compensation coefficient for the target gray level of the display panel that is located in the consistent brightness trend range.
  • the uniformity compensation algorithm calculates the uniformity compensation coefficient; the input module is used to write the Demura compensation coefficient and the uniformity compensation coefficient into the driver integrated circuit, so that the driver integrated circuit can read the Demura compensation coefficient and uniformity according to the displayed gray scale. Compensation coefficient is used to compensate.
  • embodiments of the present application provide a display compensation device, including: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the display compensation method of the first aspect is implemented.
  • embodiments of the present application provide a display device, including: a driving integrated circuit that stores the Demura compensation coefficient and the uniformity compensation coefficient obtained by the display compensation method in the first aspect, and the driving integrated circuit is used to read the Demura The compensation coefficient and the uniformity compensation coefficient perform the display compensation method of the second aspect.
  • embodiments of the present application provide a computer-readable storage medium.
  • Computer program instructions are stored on the computer-readable storage medium.
  • the display compensation method of the first aspect or the display compensation method of the second aspect is implemented. Shows the compensation method.
  • Embodiments of the present application provide a display compensation method, device, equipment, medium and display device, which can obtain brightness parameters of multiple target grayscales of a display panel, and determine target grayscales with consistent brightness trends and target grayscales with inconsistent brightness trends based on the brightness parameters. target grayscale. According to the target grayscale with consistent brightness trend and the target grayscale with inconsistent brightness trend, the brightness trend consistent interval of the grayscale can be determined.
  • the Demura compensation algorithm is used to calculate the Demura compensation coefficient for the target grayscale in the full grayscale of the display panel. Use the uniformity compensation algorithm to calculate the uniformity compensation coefficient for the target gray level of the display panel located in the consistent brightness trend range. Write the Demura compensation coefficient and the uniformity compensation coefficient into the driver integrated circuit.
  • the Demura compensation coefficient affects the full gray scale displayed by the display panel, that is, the Demura compensation will compensate for the full gray scale displayed by the display panel; the uniformity compensation coefficient only It works on the grayscales displayed by the display panel that are in the consistent range of the brightness trend. That is, the uniformity compensation will only compensate for the grayscales displayed by the display panel that are located in the consistent range of the brightness trend, thereby avoiding the compensation effect of Demura compensation and uniformity compensation.
  • the compensation effects cancel each other out and improve the uniformity of the display panel.
  • Figure 1 is a flow chart of a display compensation method provided by an embodiment of the present application.
  • Figure 2 is a flow chart of a display compensation method provided by another embodiment of the present application.
  • Figure 3 is a schematic diagram of sub-region division in an embodiment of the present application.
  • Figure 4 is a flow chart of a display compensation method provided by yet another embodiment of the present application.
  • Figure 5 is a flow chart of a display compensation method provided by yet another embodiment of the present application.
  • Figure 6 is a flow chart of a display compensation method provided by yet another embodiment of the present application.
  • Figure 7 is a flow chart of a display compensation method provided by an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a display compensation device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a display compensation device provided by an embodiment of the present application.
  • Demura compensation method refers to lighting up the display panel, photographing the display panel, obtaining the display brightness of the display panel, determining the Mura area of the display panel based on the display brightness, and processing the Mura area to eliminate Mura.
  • the uniformity compensation method for voltage drop means that after the display panel is turned on, the display panel is photographed in multiple areas to obtain the display brightness of each area of the display panel.
  • the brightness of multiple areas has a large difference, the brightness is reduced excessively.
  • the display brightness of the area with high brightness is increased, and/or the display brightness of the area with too low brightness is increased.
  • the display uniformity after compensation by the two compensation methods has not been greatly improved.
  • the inventor found through research that the demura compensation method and the uniformity compensation method will weaken each other, so that the display uniformity after compensation by the two compensation methods is not greatly improved, and the display uniformity of the display panel is still poor.
  • This application provides a display compensation method, device, equipment, medium and display device, which can determine the target gray scale with consistent brightness trend and the target gray scale with inconsistent brightness trend based on the brightness parameters of the display panel at different gray scales.
  • the gray scale interval with consistent brightness trend and the gray scale interval with inconsistent brightness trend of the display panel can be determined.
  • the compensation effects of the Demura compensation method and the uniformity compensation method will cancel each other out. Therefore, the Demura compensation method and uniformity are only used when the grayscale is located in the grayscale interval with consistent brightness trends. Compensation method is used to compensate, and only the Demura compensation method is used to compensate in the grayscale range with inconsistent brightness trends to prevent the effects of the two compensation methods from canceling each other out, thereby improving the uniformity of the display panel.
  • the display compensation method, device, equipment, medium and display device provided by this application are described below respectively.
  • the first aspect of this application provides a display compensation method.
  • the display compensation method can be applied to a display compensation device or display compensation equipment such as a host computer, that is, the display compensation method can be executed by a display compensation device or display compensation equipment such as a host computer.
  • Figure 1 shows a display compensation method provided by an embodiment of the present application. As shown in Figure 1, the display compensation method may include steps S101 to S105.
  • step S101 brightness parameters of two or more target gray levels in the full gray scale of the display panel are obtained, and based on the brightness parameters, target gray levels with consistent brightness trends and target gray levels with inconsistent brightness trends are determined.
  • the target grayscale may include a grayscale specified for uniformity compensation on the display panel and a grayscale specified for demura compensation on the display panel.
  • the specified grayscale selected here may be based on specific scenarios, needs, experience, etc. Settings are not limited here.
  • the target grayscale may include a partial grayscale selected by performing uniformity compensation on the display panel and a partial grayscale selected by performing demura compensation on the display panel.
  • the display screen has 256 gray levels, that is, 0 to 255.
  • the target gray level can include the maximum gray level of the display screen and the maximum gray level among the gray levels specified for shooting during the Demura compensation process.
  • the maximum gray level of the display screen is 255. If the gray levels specified for shooting during the Demura compensation process include 224, 192, 128, 64, 32 and 16, the maximum gray level among the gray levels specified for shooting during the Demura compensation process of the display panel is 224.
  • the target gray level may include 255 and 224. On the basis that the target gray level includes 255 and 224, the target gray level may also include other gray levels, which is not limited here.
  • the brightness parameter is used to characterize brightness, and may include brightness, relative brightness, or other parameters that can characterize brightness, and is not limited here.
  • the brightness parameter can be obtained by photographing the display panel at a target grayscale. Based on the brightness parameters, the brightness trend of the display panel can be determined, and the brightness trend can characterize the brightness distribution trend. Under different target grayscales, the brightness trend of the display panel may be consistent or inconsistent. According to the brightness parameters of each target gray scale, it can be determined whether the brightness trend of each target gray scale is consistent. If the brightness trend of the target gray level is consistent, then the target gray level is a target gray level with a consistent brightness trend. If the brightness trend of the target gray level is inconsistent, then the target gray level is a target gray level with inconsistent brightness trends.
  • Whether the brightness trends of target gray scales are consistent can refer to whether the brightness trends of different target gray scales are consistent, which can be determined by the brightness distribution of different target gray scales. For example, when the target gray level displayed by the display panel is 255, the brightness of the display panel gradually decreases from top to bottom. When the target gray level displayed by the display panel is 224, the brightness of the display panel gradually decreases from top to bottom. That is, the target gray level of the display panel is 224. The brightness trend of is consistent with the brightness trend of the target gray level 255 of the display panel. It can be considered that the brightness trend of the target gray level 224 of the display panel is consistent, that is, the target gray level 224 is a target gray level with a consistent brightness trend.
  • the target grayscale displayed by the display panel when the target grayscale displayed by the display panel is 255, the brightness of the display panel gradually decreases from top to bottom.
  • the target grayscale displayed by the display panel is 128, the brightness of the display panel gradually increases from top to bottom, that is, the target grayscale of the display panel.
  • the brightness trend of 128 is inconsistent with the brightness trend of the target gray level 255 of the display panel. It can be considered that the brightness trend of the target gray level 128 of the display panel is inconsistent, that is, the target gray level 128 is a target gray level with inconsistent brightness trends.
  • Whether the brightness trend of the target gray scale is consistent can also refer to whether the brightness trends of different display colors under the same target gray scale are consistent, which can be determined by the brightness distribution of different display colors under the same target gray scale.
  • the target gray level of the display panel is 255.
  • the display panel displays white the brightness of the display panel gradually decreases from top to bottom.
  • the display panel displays green, blue, and red respectively, the brightness of the display panel gradually decreases from top to bottom, that is, the display panel displays white.
  • the brightness trend of the panel displaying white under the condition of target gray level 255 is consistent with the brightness trend of the display panel displaying green, blue, and red.
  • the brightness trend of the target gray level 255 of the display panel is consistent, that is, the target gray level 255 is the brightness trend. Consistent target grayscale.
  • the target gray level displayed by the display panel is 192.
  • the brightness of the display panel gradually decreases from top to bottom.
  • the display panel displays green, blue, and red respectively, the brightness of the display panel gradually increases from top to bottom, that is, The brightness trend of the display panel displaying white under the condition of target gray level 192 is inconsistent with the brightness trend of the display panel displaying green, blue, and red.
  • the brightness trend of the display panel's target gray level 192 is inconsistent, that is, the target gray level 192 is the brightness Target grayscale with inconsistent trends.
  • the target grayscale and the display color can also be combined with the target grayscale and the display color to jointly determine whether the brightness trend of the target grayscale is consistent. If the brightness trends corresponding to the target grayscale and the display color are consistent, the brightness trend of the target grayscale can be considered to be consistent; if the target grayscale and display color are consistent. If at least one of the displayed colors has inconsistent brightness trends, it can be considered that the brightness trends of the target gray scale are inconsistent.
  • step S102 a brightness trend-consistent interval of all gray levels is determined based on the target grayscale with consistent brightness trends and the target grayscale with inconsistent brightness trends.
  • the grayscale interval with continuous and consistent brightness trend and the grayscale interval with continuous and inconsistent brightness trend can be judged.
  • the interval where the brightness trend is continuous and consistent can be regarded as the brightness trend consistent interval.
  • other gray scale intervals except the brightness trend consistent interval are non-brightness trend consistent intervals.
  • step S103 for the target grayscale in the full grayscale of the display panel, the Demura compensation algorithm is used to calculate the Demura compensation coefficient.
  • Full grayscale includes grayscales 0 to 255.
  • the target grayscales in full grayscale are all selected target grayscales. You can shoot each target gray level displayed on the display panel and collect brightness parameters; calculate the Demura compensation coefficient based on the collected brightness parameters and the expected brightness parameters of Demura compensation, or perform Mura signal filtering processing on the collected brightness parameters.
  • the extracted point type Mura, line type Mura, etc. are filtered out to calculate the Demura compensation coefficient, and the corresponding positions of point type Mura, line type Mura, etc. are displayed and repaired.
  • the Demura compensation coefficient can be used to participate in the Demura compensation calculation of any gray level on the display panel, thereby performing Demura compensation on the display of any gray level on the display panel.
  • the Demura compensation coefficient can be a product coefficient or an offset, which is not limited here.
  • step S104 a uniformity compensation coefficient is calculated using a uniformity compensation algorithm for the target grayscale of the display panel located in a consistent brightness trend interval.
  • the uniformity compensation here mainly refers to the voltage drop uniformity compensation (i.e. IR Drop uniformity compensation).
  • uniformity compensation is only used for gray levels located in the brightness trend consistent interval, and uniformity compensation is not used for gray levels located in non-brightness trend consistent intervals.
  • the brightness parameters of the display panel are collected, and the uniformity compensation coefficient can be calculated based on the brightness parameters and the expected brightness parameters of the uniformity compensation.
  • the uniformity compensation coefficient can be used to participate in the uniformity compensation calculation when the display panel is located at any gray level in the consistent brightness trend range, so as to perform uniform compensation for the display of the display panel at any gray level in the consistent brightness trend range.
  • step S105 the Demura compensation coefficient and the uniformity compensation coefficient are written into the driver integrated circuit (Integrated Circuit, IC), so that the driver IC reads the Demura compensation coefficient and the uniformity compensation coefficient to perform compensation according to the displayed gray scale.
  • IC Integrated Circuit
  • the Demura compensation coefficient and the uniformity compensation coefficient can be burned into the driving integrated circuit of the display device. If the gray scale displayed by the display panel includes a gray scale located in the consistent interval of the brightness trend, the display panel reads the Demura compensation coefficient and the uniformity compensation coefficient, and uses the gray scale, Demura compensation coefficient and uniformity compensation coefficient displayed by the display panel to perform Demura Compensation and uniformity compensation, in which uniformity compensation only acts on gray levels located in a consistent interval of brightness trends. If the gray scale displayed by the display panel does not include the gray scale located in the consistent interval of the brightness trend, the display panel reads the Demura compensation coefficient, and performs Demura compensation using the gray scale displayed by the display panel and the Demura compensation coefficient.
  • brightness parameters of multiple target grayscales of the display panel can be obtained, and based on the brightness parameters, target grayscales with consistent brightness trends and target grayscales with inconsistent brightness trends are determined.
  • the brightness trend consistent interval of the grayscale can be determined.
  • the Demura compensation algorithm is used to calculate the Demura compensation coefficient for the target grayscale in the full grayscale of the display panel.
  • the Demura compensation coefficient affects the full gray scale displayed by the display panel, that is, the Demura compensation will compensate for the full gray scale displayed by the display panel; the uniformity compensation coefficient only It works on the grayscales displayed by the display panel that are in the consistent range of the brightness trend. That is, the uniformity compensation will only compensate for the grayscales displayed by the display panel that are located in the consistent range of the brightness trend, thereby avoiding the compensation effect of Demura compensation and uniformity compensation.
  • the compensation effects cancel each other out and improve the uniformity of the display panel.
  • Uniformity compensation can compensate for uniformity problems caused by voltage drops when the compensation effect is effective.
  • Demura compensation when the compensation effect can work, can repair and compensate for the Mura of the display panel on the one hand, and can also compensate for the uniformity on the other hand. In the case where the compensation effect of uniformity compensation and the compensation effect of demura compensation do not cancel each other out, the uniformity of the display panel can be improved.
  • the display compensation method provided by the embodiment of the present application greatly improves the uniformity of the display panel.
  • the percentage of display panels whose uniformity meets the standard for compensation using the display compensation method provided by the embodiment of the present application can be increased by 21.4% or more compared to the method of always using both Demura compensation and uniformity compensation. high.
  • Perform uniformity testing on the compensated display panel select multiple areas in the display area of the display panel to detect uniformity, and use the display compensation method provided by the embodiment of the present application to compensate for the uniformity of multiple areas on the same display panel.
  • the average value, minimum value, and maximum value of the characteristics are all higher than the method of always using Demura compensation and uniformity compensation at the same time. It can be seen from this that the display compensation method provided by the embodiment of the present application can greatly improve the uniformity of the display panel.
  • the display area of the display panel can be divided into two or more sub-areas, and by comparing each sub-area under different gray levels, it is determined whether the brightness trend of the target gray level is consistent.
  • Figure 2 shows a display compensation method provided by another embodiment of the present application. The difference between Figure 2 and Figure 1 is that step S101 in Figure 1 can be specifically detailed into steps S1011a to step S1015a.
  • step S1011a the display area of the display panel is divided into N 1 sub-areas.
  • N 1 is an integer greater than or equal to 2.
  • the size and shape of the N 1 sub-regions may be the same or different, and are not limited here.
  • step S1012a based on the brightness parameters of the N 1 sub-regions, the brightness representation values of different target grayscales of each sub-region in the N 1 sub-regions are determined.
  • the brightness parameters of N 1 sub-regions Under the conditions of different target gray levels, obtain the brightness parameters of N 1 sub-regions. Under normal circumstances, the brightness parameters of the display panel will also vary with different gray scales. In order to make the brightness parameters of different target gray scales comparable, the brightness parameters can be processed to obtain the brightness representation value.
  • the brightness characterization value is used to characterize brightness, and the brightness characterization values under different target grayscales are comparable. By comparing the brightness representation values, it can be determined whether the brightness trend of the target gray scale is consistent.
  • the brightness representation value of a sub-region can be determined based on the brightness parameters of this sub-region and the reference brightness parameters corresponding to the target gray scale. For example, the ratio of the brightness parameter of this sub-region to the reference brightness parameter corresponding to the target grayscale can be used as the brightness representation value of this sub-region.
  • the reference brightness parameter may include a prespecified brightness parameter.
  • the reference brightness parameters corresponding to different target grayscales may be different.
  • the reference brightness parameter of the executable gray level 255 is Lv
  • the reference brightness parameter L’ corresponding to other target gray level values can be calculated according to the following formula (1):
  • x is the target gray level
  • is the gamma coefficient.
  • the brightness representation value of a sub-region at the target gray level can be the ratio of the brightness parameter of the sub-region at the target gray level and the reference brightness parameter corresponding to the target gray level value.
  • the reference brightness parameter may include the brightness parameter of any sub-region.
  • the brightness representation value of a sub-region at the target gray level can be the ratio of the brightness parameter of this sub-region at the target gray level to the brightness parameter of any sub-region at the target gray level.
  • Figure 3 is a schematic diagram of a sub-area division in an embodiment of the present application.
  • the left picture in Figure 3 shows the display area under the target gray level 255
  • the right picture in Figure 3 shows the display area under the target gray level 224.
  • the display area is divided into are three sub-regions.
  • the three sub-regions are marked as 1, 2 and 3 in Figure 3.
  • the brightness parameter of the sub-region 2 of each target gray scale can be selected as the reference brightness parameter, then the brightness of the sub-region 2 of each target gray scale is represented.
  • the value is 1.
  • step S1013a the first difference value between the brightness representation value of the target gray level and the brightness representation value of the maximum gray level of each sub-region is obtained.
  • the target gray level includes the maximum gray level, and the maximum gray level is 255.
  • the maximum gray level 255 is selected as the reference gray level.
  • the first difference value is used to characterize the difference between the brightness representation value of the target gray level of the sub-region and the brightness representation value of the maximum gray level.
  • the first difference value can be the brightness representation value of the target gray level of the sub-region and the maximum gray level.
  • the absolute value of the difference between the brightness representation values of The absolute value of the difference between the brightness representation value and the brightness representation value of the maximum gray level is called the target absolute value.
  • step S1014a when the number of sub-regions with a first difference value greater than or equal to the first consistent threshold satisfies the first preset condition, the target gray level is determined to be a target gray level with inconsistent brightness trends.
  • the first consistency threshold is a judgment threshold for judging whether the brightness trends of a single sub-region under different gray levels are consistent.
  • the first difference value is greater than or equal to the first consistent threshold, indicating that the brightness trend of the sub-region is inconsistent.
  • the first preset condition includes a determination condition indicating that the brightness trend of the entire display area of the display panel is inconsistent under the target gray scale, and is related to the number of sub-regions with inconsistent brightness trends.
  • the first preset condition includes that the number of sub-regions with a first difference value greater than or equal to the first consistent threshold is greater than or equal to the first quantity threshold.
  • the first quantity threshold can be set according to scenarios, needs, experience, etc.
  • the first quantity threshold is 1 or other positive integer.
  • the first preset condition includes that the proportion of the number of sub-regions with the first difference value greater than or equal to the first consistency threshold to the total number of sub-regions is greater than or equal to the first proportion threshold, and the first proportion threshold can be based on Settings such as scenarios, needs, experience, etc. are not limited here.
  • the first proportion threshold can be 1/3, 2/5, etc.
  • the number of sub-regions with a first difference value greater than or equal to the first consistent threshold satisfies the first preset condition, indicating that the brightness trend of the entire display area of the display panel is inconsistent under the target gray scale, and the target gray scale can be considered to be a brightness trend. Inconsistent target grayscale.
  • step S1015a when the number of sub-regions with a first difference value greater than or equal to the first consistency threshold does not meet the first preset condition, the target gray level is determined to be a target gray level with a consistent brightness trend.
  • the number of sub-regions with a first difference value greater than or equal to the first consistency threshold does not meet the first preset condition, indicating that the brightness trend of the entire display area of the display panel is consistent under the target gray scale, and the target gray scale can be considered to be brightness Trend consistent target grayscale.
  • the left picture in Figure 3 shows the display area when the target gray level is the maximum gray level, that is, gray level 255
  • the right picture in Figure 3 shows the display area when the target gray level is 224.
  • the brightness representation values of sub-regions 1, 2 and 3 in the left picture of Figure 3 are 0.95, 1.00 and 1.08 respectively
  • the brightness representation values of sub-regions 1, 2 and 3 in the right picture of Figure 3 are 1.05, 1.00 and 0.94 respectively.
  • the first difference value is the ratio of the absolute value of the difference between the brightness representation value of the target gray level of the sub-region and the brightness representation value of the maximum gray level and the brightness representation value of the maximum gray level
  • the first consistency threshold is 8%
  • the brightness parameters of each sub-region of the display panel when the maximum gray scale displays different colors can be collected, and based on the brightness parameters, the maximum gray scale of each sub-region under different display colors can be determined.
  • the brightness representation value determines the maximum gray value by comparing the difference value between the brightness representation values of different display colors in the same sub-region with the consistent threshold value, as well as the number and preset conditions of the sub-regions with the gap value greater than or equal to the consistent threshold value. Whether the level is a target gray level with a consistent brightness trend.
  • difference value For the difference value, consistency threshold value, and preset condition, please refer to the relevant content of the first difference value, the first consistency threshold value, and the first preset condition in the above embodiments, but the specific selection of the difference value, consistency threshold value, and preset condition The value may be different from the first difference value, the first consistency threshold, and the first preset condition in the above embodiment.
  • the display area of the display panel can be divided into two or more sub-areas, and by comparing the same sub-area under different gray levels and different colors under the same gray level, it is determined whether the brightness trend of the target gray level is consistent.
  • Figure 4 shows a display compensation method provided by yet another embodiment of the present application. The difference between Figure 4 and Figure 1 is that step S101 in Figure 1 can be specifically detailed into steps S1011b to step S1015b.
  • step S1011b the display area of the display panel is divided into N 2 sub-areas.
  • N 2 is an integer greater than or equal to 2.
  • N 2 and N 1 may be equal or different.
  • step S1012b based on the brightness parameters of the N 2 sub-regions, determine the brightness representation values of different target grayscales of each sub-region in the N 2 sub-regions, and the first display color of each sub-region at the same target gray scale. a brightness characterization value and a brightness characterization value of the second display color.
  • the target gray level includes the maximum gray level.
  • the brightness parameters of N 2 sub-regions are obtained.
  • the display colors include white, red, green and blue.
  • the brightness parameters of N 2 sub-regions that display white, the brightness parameters of N 2 sub-regions that display red, and the N 2 sub-regions that display green can be obtained.
  • the first display color is white
  • the second display color is at least one of red, green, and blue.
  • the brightness trends of the entire display panel and sub-regions corresponding to red, green, and blue are the same. For example, if the brightness trend of the entire display panel corresponding to red is the same, then the brightness trend of the entire display panel corresponding to green will be the same. It is also consistent, and the overall brightness trend of the display panel corresponding to blue is also consistent. In order to further speed up the acquisition of a brightness trend consistent interval, one of red, green, and blue can be selected as the second display color.
  • the brightness parameters of the display panel may vary with different display colors.
  • the brightness parameters can be processed to obtain the brightness representation value.
  • the brightness characterization value is used to characterize brightness, and the brightness characterization values of different display colors are comparable. Comparing the brightness representation values of different display colors of the same target grayscale can also help determine whether the target grayscale is a target grayscale with a consistent brightness trend.
  • the brightness representation value of the first display color and the brightness representation value of the second display color can be determined according to the brightness parameter of the sub-region and the reference brightness parameter corresponding to the target gray scale. For details, please refer to the relevant description of the brightness representation value in the above embodiment. I won’t go into details here.
  • step S1013b obtain the second difference value between the brightness representation value of the target gray level of each sub-region and the brightness representation value of the maximum gray level, and the brightness representation of the first display color of each sub-region at the same target gray level.
  • the third difference value between the value and the brightness representation value of the second display color.
  • the brightness trend of each sub-region at different gray levels can also be used. Trend assists in determining the overall brightness trend of the display panel.
  • the third difference value is used to characterize the difference between the brightness representation value of the sub-region displaying the first display color and the brightness representation value of the second display color.
  • the third difference value may be the brightness representation value of the sub-region displaying the first display color.
  • the absolute value of the difference from the brightness representation value of the second display color may also be the ratio of the absolute value of the difference to the brightness representation value of the first display color, which is not limited here.
  • step S1014b when the second difference value exceeds the second consistent threshold, the number of sub-regions satisfies the second preset condition, or when the third difference value exceeds the third consistent threshold, the number of sub-regions satisfies the third preset condition.
  • the target gray level is determined to be a target gray level with inconsistent brightness trends.
  • the third consistency threshold is a judgment threshold used to judge whether the brightness trends of a single sub-region under different gray levels are consistent.
  • the third difference value is greater than or equal to the third consistent threshold, indicating that the brightness trend of the sub-region is inconsistent.
  • the third preset condition includes a determination condition indicating that the brightness trends of the entire display area of the display panel are inconsistent in different display colors, and is related to the number of sub-regions with inconsistent brightness trends.
  • the third preset condition includes that the number of sub-regions with a third difference value greater than or equal to the third consistency threshold is greater than or equal to the third quantity threshold.
  • the third quantity threshold can be set according to scenarios, needs, experience, etc., here It is not limited, for example, the third quantity threshold is 1 or other positive integer.
  • the third preset condition includes that the proportion of the number of sub-regions with a third difference value greater than or equal to the third consistency threshold to the total number of sub-regions is greater than or equal to the third proportion threshold, and the third proportion threshold can be based on Settings such as scenarios, needs, and experience are not limited here.
  • the third proportion threshold can be 1/3, 2/5, etc.
  • the number of sub-regions with a third difference value greater than or equal to the third consistency threshold satisfies the third preset condition, indicating that the brightness trends of different display colors in the entire display area of the display panel are inconsistent under the target grayscale.
  • step S1015b the number of sub-regions in which the second difference value exceeds the second consistent threshold does not meet the second preset condition, and the number of sub-regions in which the third difference value exceeds the third consistent threshold does not satisfy the third Under preset conditions, the target gray level is determined to be a target gray level with a consistent brightness trend.
  • the maximum gray scale of the display panel it can be determined whether the brightness trends of the maximum gray scale are consistent according to the third difference value, the third consistency threshold, and the third preset condition.
  • the third difference value, the third consistency threshold, and the third preset condition please refer to the relevant descriptions in the above embodiments and will not be described again here.
  • the accuracy of determining whether the overall brightness trend of the display panel is consistent is used to improve the accuracy of subsequently obtaining consistent brightness trend intervals and improve the compensation accuracy, thereby further improving the uniformity of the display panel display.
  • the target gray level includes a maximum gray level, and the maximum gray level is 255.
  • the brightness trend consistent interval can be determined by jumping from a consistent brightness trend to a target gray level with inconsistent brightness trends.
  • Figure 5 shows a display compensation method provided by yet another embodiment of the present application. The difference between Figure 5 and Figure 1 is that step S102 in Figure 1 can be specifically refined into step S1021 and step S1022 in Figure 5 , or step S102 in Figure 1 can be specifically refined into the steps in Figure 5 S1023 and step S1024, or step S102 in FIG. 1 can be specifically detailed into steps S1025 to S1027 in FIG. 5 .
  • step S1021 the first target gray level is searched for in the target gray level in descending order of the target gray level.
  • the first target gray level is the first target gray level with inconsistent brightness trends. Whether the brightness trends of the target gray levels are consistent can be determined sequentially in descending order of the target gray levels. In this process, the first target gray level with inconsistent brightness trends is determined as the first target gray level.
  • step S1022 a brightness trend consistent interval is determined based on the first target gray level.
  • the upper limit value of the brightness trend consistent interval is the maximum gray level
  • the lower limit value of the brightness trend consistent interval is the first target gray level.
  • the area in the full gray scale except the brightness trend consistent interval is the non-brightness trend consistent interval, and the non-brightness trend consistent interval can be regarded as the gray scale interval with inconsistent brightness trend. For example, if the first target gray level is Dn, the brightness trend consistent interval is (Dn, 255], and the non-brightness trend consistent interval is (0, Dn].
  • Target grayscale 255 Target grayscale 224
  • Target grayscale 128 Brightness trend consistent interval 1 1 1 (pending value, 255] 1 1 0 (128,255] 1 0 1 (224,255] 1 0 0 (224,255] 0 1 1 255 0 1 0 255 0 0 1 255 0 0 0 255 0 0 255
  • 1 means the brightness trend is consistent
  • 0 means the brightness trend is inconsistent
  • the target gray level 255, the target gray level 224, and the target gray level 128 all have the same brightness trend, since the target gray level with inconsistent brightness trends has not yet appeared, more target gray levels can be used until there is an inconsistent brightness trend.
  • the target gray level, the to-be-determined value is the first subsequent target gray level with inconsistent brightness trends.
  • target gray level 128 is the first one with inconsistent brightness trends.
  • the brightness trend consistent interval is (128, 255], and the non-brightness trend consistent interval is (0, 128].
  • the brightness trend is consistent at the target gray level 255, the brightness of the target gray level 224, and the target gray level 128
  • target gray level 224 is the first target gray level with inconsistent brightness trends. Therefore, the brightness trend consistent interval is (224, 255], and the non-brightness trend is consistent.
  • the interval is (0, 224].
  • the target gray level 224 is the first target gray level with inconsistent brightness trend. Therefore, the brightness trend consistent interval is (224, 255], and the non-brightness trend consistent interval is (0, 224].
  • the brightness trend at the target gray level 255 is inconsistent, that is, the target gray level When 255 is the first target grayscale, you can no longer pay attention to the brightness trends of other grayscales.
  • a fixed number of target gray levels can be selected in advance. If the fixed number of target gray levels include the first target gray level, after the first target gray level is obtained, it can no longer be determined that the target gray level is smaller than the first target gray level. Whether the brightness trend of other target grayscales is consistent.
  • a fixed number of target gray levels can be selected in advance. If the fixed number of target gray levels does not include the first target gray level, smaller target gray levels can be continued to be acquired, and the brightness of the newly acquired target gray level can be determined. Whether the trend is consistent until the first target gray level appears.
  • multiple candidate gray levels can be selected relatively evenly from the full gray level 0 to 255 in advance, and the candidate gray levels can be used as the target gray levels in sequence, and the candidate gray levels can be selected in order from the largest to the smallest target gray level. Whether the brightness trends are consistent is determined until the first target gray level is obtained, and whether the brightness trends of other candidate gray levels smaller than the first target gray level are consistent is not determined.
  • the main focus is on the first target gray level with inconsistent brightness trends in order from large to small, that is, the first target gray level, and no attention is paid to whether there are other target gray levels after the first target gray level.
  • Having a gray scale with a consistent brightness trend can save computing resources, reduce the time spent in determining a consistent brightness trend interval, improve the efficiency of display compensation, and achieve a better balance between display compensation efficiency and display compensation effect.
  • step S1023 the first type of gray scale and the second type of gray scale are searched in the target gray scale in descending order of the target gray scale.
  • the first type of grayscale includes target grayscales whose brightness trends are inconsistent and different from the brightness trend of the previous target grayscale. That is to say, the brightness trend of the first type of gray scale is inconsistent, and in the order of the target gray scale from large to small, the brightness trend of the previous target gray level of the first type of gray level is consistent.
  • the first type of gray scale can be regarded as the turning point from a gray scale with a consistent brightness trend to a gray scale with an inconsistent brightness trend.
  • the second type of gray scale includes target gray scales whose brightness trend is consistent and different from the brightness trend of the previous target gray scale. That is to say, the brightness trends of the second type of gray scale are consistent, and in order from large to small target gray scales, the brightness trends of the previous target gray scale of the second type of gray scale are inconsistent.
  • the second type of gray scale can be regarded as the turning point from a gray scale with inconsistent brightness trends to a gray scale with consistent brightness trends.
  • step S1024 in descending order of the target grayscale, the interval from the maximum grayscale to the first first-type grayscale, the interval from the second-type grayscale to the adjacent first-type grayscale, and /Or, the interval from the smallest second type gray level to the smallest gray level is determined as the brightness trend consistent interval.
  • the interval from the maximum gray level to the first first-type gray level does not include the first first-type gray level.
  • the interval from the second gray level to the adjacent first gray level may not include the adjacent first gray level.
  • the brightness trend consistent interval includes the interval from the maximum gray level to the first first-type gray level.
  • the first type of gray level includes the target gray level 64
  • the second type of gray level includes the target gray level 16.
  • the brightness trend consistent interval includes (64, 255] and (0, 16], non The brightness trend consistent interval includes (16, 64].
  • the first type of gray level includes the target gray level 224 and the target gray level 32
  • the second type of gray level includes the target gray level 64.
  • the brightness trend The consistent intervals include (224, 255] and (32, 64], and the non-brightness trend consistent intervals include (64, 224] and (0, 32].
  • the first type of gray level includes the target gray level 224 and the target gray level 64.
  • the second type of gray level includes the target gray level 128 and the target gray level 32.
  • the brightness trend consistent intervals include (224, 255], (64, 128] and (0, 32], non-brightness
  • the trend consistent intervals include (128, 224] and (32, 64].
  • the first type of gray level includes the target gray level 32, and the second type of gray scale includes the target gray level 224.
  • the brightness trend The consistent interval includes (32, 224], and the non-brightness trend consistent interval includes (224, 255] and (0, 32].
  • the first type of gray level includes the target gray level 128 and the target gray level 16
  • the second type of gray scale includes target gray scale 224 and target gray scale 64.
  • the brightness trend consistent intervals include (128, 224] and (16, 64]
  • the non-brightness trend consistent intervals include (224, 255], (64 , 128] and (0, 16].
  • the first type of gray level includes the target gray level 64
  • the second type of gray scale includes the target gray level 128 and the target gray level 32.
  • the brightness trends are consistent The intervals include (64, 128] and (0, 32]
  • the non-brightness trend-consistent intervals include (128, 255] and (32, 64].
  • steps S1023 and S1024 attention is paid to each interval with a consistent brightness trend and an interval with inconsistent brightness trends in the full gray scale, so that the determined interval with a consistent brightness trend is more accurate, further improving the compensation effect of the display panel, thereby further improving the display Panel display uniformity.
  • step S1025 the highlight grayscale interval is obtained.
  • the highlight grayscale interval is a preset grayscale area that represents high brightness.
  • a highlight grayscale threshold can be set, and the highlight grayscale interval is a grayscale area whose grayscale is greater than or equal to the highlight grayscale threshold.
  • the grayscale areas in the full grayscale except the high-brightness grayscale interval are low-brightness grayscale areas.
  • the low-brightness grayscale area may include grayscale areas whose grayscale is less than the high-brightness grayscale threshold.
  • step S1026 in the highlighted grayscale interval, the third type of grayscale and the fourth type of grayscale are searched in the target grayscale in descending order of the target grayscale.
  • the third type of gray scale includes target gray scales with inconsistent brightness trends and different brightness trend consistency from the previous target gray scale. That is to say, the third type of gray scale is located in the high-brightness gray scale interval, the brightness trend of the third type of gray scale is inconsistent, and in the order of the target gray scale from large to small, the previous target gray scale of the third type of gray scale is The brightness trend is consistent.
  • the third type of gray scale can be regarded as the turning point from a high-brightness gray scale interval with a consistent brightness trend to a gray scale with inconsistent brightness trends.
  • the fourth category of gray levels includes target gray levels that have a consistent brightness trend and are different from the brightness trend consistency of the previous target gray level. That is to say, the fourth type of gray scale is located in the high-brightness gray scale interval, the brightness trend of the fourth type of gray scale is consistent, and in the order of the target gray scale from large to small, the brightness of the previous target gray scale of the fourth type of gray scale is Brightness trends are inconsistent.
  • the fourth type of gray scale can be regarded as the turning point from the inconsistent brightness trend in the highlight gray scale interval to the gray scale with consistent brightness trend.
  • step S1027 in order of the target grayscale from large to small, select the maximum grayscale in the highlighted grayscale interval to the first third category grayscale, and the fourth category grayscale to the adjacent third category grayscale.
  • the gray scale interval, and/or, the interval from the smallest fourth type gray scale to the smallest gray scale is determined as the brightness trend consistent interval.
  • the interval from the maximum gray level to the first third category gray level does not include the first third category gray level.
  • the interval from the fourth gray level to the adjacent third gray level may not include the adjacent third gray level.
  • the consistent brightness trend interval includes the interval from the maximum gray level to the first third type gray level.
  • the brightness trend consistent interval includes the smallest third The range from the four types of gray levels to the minimum gray level.
  • the minimum gray scale here may include the minimum gray scale value in the full gray scale or the minimum gray scale value in the highlighted gray scale interval.
  • the full grayscale is [0, 255]
  • the highlighted grayscale interval is [64, 255]
  • the minimum grayscale value in the full grayscale is 0, and the minimum grayscale value in the highlighted grayscale interval is 64.
  • a table is used below to illustrate the method of determining the brightness trend consistent interval through steps S1025 to S1027, where the highlight grayscale interval is [64, 255], and the minimum grayscale may include grayscales in full grayscales.
  • the minimum value is as shown in Table 3 below:
  • the third type of gray level includes the target gray level 64, and there is no fourth type of gray level.
  • the brightness trend consistent interval includes (64, 255], and the non-brightness trend consistent interval includes (0, 64] .
  • the third type of gray level includes the target gray level 224, and the fourth type of gray level includes the target gray level 64.
  • the brightness trend consistent interval includes (224, 255], and the non-brightness trend consistent interval includes (0, 224].
  • the third type of gray level includes the target gray level 224 and the target gray level 64
  • the fourth type of gray scale includes the target gray level 128.
  • the brightness trend consistent interval includes (224 , 255] and (64, 128]
  • the non-brightness trend consistent intervals include (128, 224] and (0, 64].
  • the fourth type of gray scale includes the target gray Level 224
  • the brightness trend consistent interval includes (0, 224]
  • the non-brightness trend consistent interval includes (224, 255].
  • the third type of gray level includes the target gray level 128, and the fourth type The gray scale includes the target gray scale 224 and the target gray scale 64.
  • the brightness trend consistent interval includes (128, 224], and the non-brightness trend consistent interval includes (224, 255] and (0, 128].
  • the third type of gray level includes the target gray level 64
  • the fourth type of gray level includes the target gray level 128.
  • the brightness trend consistent interval includes (64, 128]
  • the non-brightness trend consistent interval includes (128, 255] and (0,64].
  • the fourth case shown in Table 3 as an example to illustrate the brightness trend consistent interval and the non-brightness trend consistent interval under the condition that the minimum gray level includes the gray level minimum value in the highlighted gray level interval.
  • the fourth case there is no third type of gray level, and the fourth type of gray level includes the target gray level 224.
  • the non-brightness trend consistent interval includes (224, 255], and the brightness trend consistent interval includes (64, 224], (0, 64] can be determined as a non-brightness trend consistent interval, or as a brightness trend consistent interval.
  • the uniformity problem is more obvious under high brightness conditions, that is, when the gray scale is in the high-brightness gray scale interval, and has a greater impact on the display effect.
  • the uniformity problem is difficult to detect with the naked eye under low brightness conditions, that is, when the gray scale is not in the high-brightness gray scale range, and the impact on the display effect is very small and can be ignored.
  • steps S1025 to S1027 whether the brightness trend of the gray scale in the non-highlight gray scale interval is consistent is omitted, and the main focus is whether the brightness trend of the target gray scale in the highlighted gray scale interval is consistent. This can improve the uniformity effect. to reduce the consumption of computing resources and further improve the efficiency of display compensation.
  • the uniformity compensation coefficient can be obtained through data fitting.
  • Figure 6 shows a display compensation method provided by yet another embodiment of the present application. The difference between Figure 6 and Figure 1 is that step S104 in Figure 1 can be specifically detailed into step S1041 and step S1042 in Figure 6 .
  • step S1041 for the target gray scale located in the brightness trend consistent interval of the display panel, a uniformity compensation algorithm is used to obtain the gain coefficient corresponding to the target gray level located in the brightness trend consistent interval.
  • the display panel can collect and display the brightness parameters of target grayscales located in a consistent brightness trend range. Based on the brightness parameters and expected brightness parameters, the uniformity compensation algorithm is used to calculate the gain coefficient corresponding to each target grayscale located in a consistent brightness trend range. The gain coefficient can be used to compensate the part of the original display signal corresponding to the target grayscale located in the consistent brightness trend interval, so that when the display panel displays the target grayscale located in the consistent brightness trend interval, the collected brightness parameters can be the same as the expected brightness parameters. or tend to be the same.
  • step S1042 using the target grayscale located in the brightness trend consistent interval and the gain coefficient corresponding to the target grayscale located in the brightness trend consistent interval, the constant coefficient of the gain coefficient curve of the brightness trend consistent interval is obtained by fitting calculation, and the constant coefficient is The coefficient is determined as the uniformity compensation coefficient.
  • Each target gray level located in the brightness trend consistent interval corresponds to a gain coefficient.
  • Each target gray level located in the brightness trend consistent interval and the gain coefficient corresponding to the target gray level can be converted into coordinate points (target gray level, gain coefficient), and a uniformity compensation gain calculation formula with unknown constant coefficients can be established.
  • Gain coefficient curve used to characterize the consistent interval of brightness trend The gain coefficient curve is the relationship between gain coefficient and gray scale.
  • the constant coefficient of the uniformity compensation gain formula is solved to obtain the constant coefficient.
  • the uniformity compensation gain formula with known constant coefficients can accurately characterize the gain coefficient curve in the consistent brightness trend range. This constant coefficient is the uniformity compensation coefficient required for uniformity compensation.
  • Algorithms for fitting calculation may include fitting algorithms such as least squares method, which are not limited here.
  • uniformity compensation gain formula For example, a uniformity compensation gain formula can be established, and the uniformity compensation gain formula is as follows (2):
  • a and b are constant coefficients, which are currently unknown; x is the gray scale, and y is the gain coefficient.
  • the least squares method can be used to calculate the specific values of the constant coefficients a and b.
  • the specific calculation process can be as follows (3) to (6):
  • Gain coefficient For example, if the brightness trend consistent interval includes 3 target gray levels, and the target gray levels are 255, 224, and 128 respectively, the gain coefficient corresponding to the target gray level 255 is G1, the gain coefficient corresponding to the target gray level 224 is G2, and the target gray level 224 corresponds to G2.
  • the gain coefficient corresponding to 128 is G3.
  • the three coordinate points (255, G1), (224, G2) and (128, G3) can be used as (x 1 , y 1 ), (x 2 , y 2 ) and (x 3 , y 3 ) are substituted into the above formulas (3) to (6), and the constant coefficients a and b are calculated.
  • the constant coefficients a and b can be obtained, and the constant coefficients a and b are the uniformity compensation coefficients.
  • the uniformity compensation gain calculation formula of the gain coefficient curve used to characterize the brightness trend consistent interval can be obtained.
  • the uniformity compensation gain calculation formula can be written into the display panel. After the uniformity compensation coefficient is written into the display panel, the display panel can read the uniformity compensation coefficient and run the uniformity compensation gain calculation formula to calculate the gain coefficient. Use the gain coefficient to Compensate the display signal when the brightness trend is within the same range.
  • the display area of the display panel includes multiple sub-areas.
  • the gain coefficient corresponding to the target grayscale located in the consistent brightness trend interval includes the gain coefficient corresponding to the target grayscale located in the consistent brightness trend interval in each sub-region
  • the constant coefficient of the gain coefficient curve in the consistent brightness trend interval includes each sub-region.
  • the constant coefficient corresponding to each sub-region can be calculated through steps S1041 and S1042.
  • the constant coefficient corresponding to each sub-region can be calculated according to the above formulas (2) to (6).
  • the gain coefficients of different sub-regions may be different, and the constant coefficients corresponding to different sub-regions may also be different.
  • the constant coefficient corresponding to each sub-area can be written into the display panel, and the display panel can read the constant coefficient corresponding to each sub-area, and perform uniformity compensation on each sub-area according to the division of the sub-areas. Uniformity compensation in the molecular region can further increase the accuracy of the uniformity compensation, thereby further improving the uniformity of the display panel display.
  • a second aspect of the present application provides a display compensation method that is applied to a driving IC in a display device, that is, the display compensation method can be executed by the driving IC.
  • the driver IC stores the Demura compensation coefficient and the uniformity compensation coefficient obtained in the first embodiment and written into the driver IC.
  • Figure 7 shows a flow chart of a display compensation method provided by an embodiment of the present application. As shown in FIG. 7 , the display compensation method may include steps S201 to S203.
  • step S201 the displayed grayscale is determined according to the display signal.
  • the display signal is a signal used to characterize the display image.
  • the display panel displays images according to the display signal.
  • the grayscale corresponding to the displayed image can be determined through the display signal.
  • step S202 when the displayed gray scale includes a gray scale located in the brightness trend consistent interval, read the stored Demura compensation coefficient and uniformity compensation coefficient, and compensate based on the displayed gray scale, Demura compensation coefficient and uniformity The coefficients compensate the display signal.
  • the gray scale displayed includes the gray scale located in the consistent interval of the brightness trend.
  • the part of the display signal corresponding to the gray scale located in the consistent interval of the brightness trend needs to be compensated using the uniformity compensation coefficient and the Demura compensation coefficient; and then the compensated display is used
  • the signal is displayed graphically.
  • the uniformity compensation coefficient includes a constant coefficient of the gain coefficient curve in a consistent brightness trend interval.
  • the gray scale displayed in the brightness trend consistent interval can be substituted into the gain coefficient curve to obtain the gain coefficient corresponding to the gray level. , using the gain coefficient to compensate for the uniformity of the display signal.
  • step S203 when the displayed gray scale does not include the gray scale located in the brightness trend consistent interval, the stored Demura compensation coefficient is read, and the display signal is compensated according to the displayed gray scale and the Demura compensation coefficient.
  • the displayed grayscale does not include grayscales located in the consistent brightness trend range, which means that the compensation effect of the uniformity compensation of the displayed grayscale and the compensation effect of the Demura compensation will cancel each other out, and only the Demura compensation coefficient can be used to compensate the display signal.
  • the compensated display signal is then used for image display.
  • Using the Demura compensation coefficient to compensate the display signal can increase or decrease the voltage or current of the display signal to adjust the display signal, thereby changing the brightness of the sub-pixels driven by the display signal.
  • using the uniformity compensation coefficient to compensate the display signal can increase or decrease the voltage or current of the display signal, thereby adjusting the display signal, thereby changing the brightness of the sub-pixels driven by the display signal.
  • the compensation of the display signal by the Demura compensation coefficient and the compensation of the display signal by the uniformity compensation coefficient will superimpose on the brightness trend consistent interval. The non-brightness trend consistent interval will be affected by the compensation effect of the Demura compensation coefficient on the display signal, and will not be affected by the compensation effect of the uniformity compensation coefficient on the display signal.
  • the display panel stores the uniformity compensation coefficient and the demura compensation coefficient.
  • the display signal is consistent with the brightness trend.
  • the part corresponding to the gray scale of the interval is compensated using the Demura compensation coefficient and the uniformity compensation coefficient.
  • the Demura compensation coefficient is used to compensate it.
  • the displayed gray scale determined based on the display signal does not include the gray scale located in the brightness trend consistent interval, the displayed gray scale is compensated using the Demura compensation coefficient.
  • the third aspect of this application provides a display compensation device.
  • the display compensation device can be a host computer or other device, and is not limited here.
  • Figure 8 shows a display compensation device provided by an embodiment of the present application.
  • the display compensation device 300 may include a consistency determination module 301 , an interval determination module 302 , a first calculation module 303 , a second calculation module 304 and an entry module 305 .
  • the consistency determination module 301 can be used to obtain the brightness parameters of more than two target gray levels in the full gray scale of the display panel, and based on the brightness parameters, determine the target gray levels with consistent brightness trends and the target gray levels with inconsistent brightness trends.
  • the target gray level includes a maximum gray level.
  • the target gray level includes the maximum gray level among the gray levels specified for shooting during the Demura compensation process.
  • the interval determination module 302 may be configured to determine a brightness trend-consistent interval for all gray levels based on target gray levels with consistent brightness trends and target gray levels with inconsistent brightness trends.
  • the first calculation module 303 can be used to calculate the Demura compensation coefficient using the Demura compensation algorithm for the target grayscale in the full grayscale of the display panel.
  • the second calculation module 304 can be used to calculate a uniformity compensation coefficient using a uniformity compensation algorithm for a target gray level of the display panel located in a consistent brightness trend interval.
  • the input module 305 can be used to write the Demura compensation coefficient and the uniformity compensation coefficient into the driving integrated circuit, so that the driving integrated circuit reads the Demura compensation coefficient and the uniformity compensation coefficient for compensation according to the displayed gray scale.
  • brightness parameters of multiple target grayscales of the display panel can be obtained, and based on the brightness parameters, target grayscales with consistent brightness trends and target grayscales with inconsistent brightness trends are determined.
  • the brightness trend consistent interval of the grayscale can be determined.
  • the Demura compensation algorithm is used to calculate the Demura compensation coefficient for the target grayscale in the full grayscale of the display panel.
  • the Demura compensation coefficient affects the full gray scale displayed by the display panel, that is, the Demura compensation will compensate for the full gray scale displayed by the display panel; the uniformity compensation coefficient only It works on the grayscales displayed by the display panel that are in the consistent range of the brightness trend. That is, the uniformity compensation will only compensate for the grayscales displayed by the display panel that are located in the consistent range of the brightness trend, thereby avoiding the compensation effect of Demura compensation and uniformity compensation.
  • the compensation effects cancel each other out and improve the uniformity of the display panel.
  • the target gray level includes a maximum gray level.
  • the consistency determination module 301 can be used to: divide the display area of the display panel into N 1 sub-areas, where N 1 is an integer greater than or equal to 2; determine each sub-area in the N 1 sub-areas based on the brightness parameters of the N 1 sub-areas The brightness representation value of different target gray levels; obtain the first difference value between the brightness representation value of the target gray level of each sub-region and the brightness representation value of the maximum gray level; when the first difference value is greater than or equal to the first consistent threshold When the number of sub-regions satisfies the first preset condition, the target gray level is determined to be a target gray level with inconsistent brightness trends; when the number of sub-regions with a first difference value greater than or equal to the first consistent threshold does not satisfy the first Under preset conditions, the target gray level is determined to be a target gray level with a consistent brightness trend.
  • the target gray level includes a maximum gray level.
  • the consistency determination module 301 can be used to: divide the display area of the display panel into N 2 sub-areas, where N 2 is an integer greater than or equal to 2; determine each of the N 2 sub-areas based on the brightness parameters of the N 2 sub-areas The brightness representation values of different target grayscales, as well as the brightness representation values of the first display color and the brightness representation value of the second display color in each sub-area at the same target grayscale, the first display color is white, and the second display color It is at least one of red, green, and blue; obtains the second difference value between the brightness representation value of the target gray level of each sub-region and the brightness representation value of the maximum gray level, and the same target gray level of each sub-region.
  • the brightness representation value is determined based on the brightness parameter of the sub-region and the reference brightness parameter corresponding to the target grayscale.
  • the reference brightness parameter includes a pre-specified brightness parameter or a brightness parameter of any sub-region.
  • the target gray level includes a maximum gray level.
  • the interval determination module 302 can be used to: search for the first target gray level in the target gray level in order from large to small, where the first target gray level is the first target gray level with inconsistent brightness trends; according to the first The target gray level determines the brightness trend consistent interval.
  • the upper limit of the brightness trend consistent interval is the maximum gray level, and the lower limit of the brightness trend consistent interval is the first target gray level.
  • the target gray level includes a maximum gray level.
  • the interval determination module 302 can be used to: search the first type of gray level and the second type of gray level in the target gray level in order from large to small, where the first type of gray level includes the same as the previous target gray level.
  • the second type of grayscale includes target grayscales with different and consistent brightness trends from the previous target grayscale. In order from largest to smallest, the largest grayscale is The interval to the first first-category gray level, the interval from the second-category gray level to the adjacent first-category gray level, and/or, the interval from the smallest second-category gray level to the smallest gray level is determined as the brightness trend. consistent interval.
  • the target gray level includes a maximum gray level.
  • the interval determination module 302 can be used to: obtain the highlight grayscale interval; in the highlighted grayscale interval, search for the third type of grayscale and the fourth type of grayscale in the target grayscale in order from large to small.
  • the third type of gray level includes target gray levels that are different in brightness trend consistency and inconsistent with the previous target gray level
  • the fourth type of gray level includes different and consistent brightness trend consistency with the previous target gray level.
  • the target gray level in order of the target gray level from large to small, change the maximum gray level in the highlighted gray level interval to the first third category gray level, and the fourth category gray level to the adjacent third category gray level.
  • the gray scale interval, and/or, the interval from the smallest fourth type gray scale to the smallest gray scale is determined as the brightness trend consistent interval.
  • the second calculation module 304 can be used to: use a uniformity compensation algorithm for a target gray level located in a consistent brightness trend interval of the display panel to obtain a gain coefficient corresponding to the target gray level located in a consistent brightness trend interval; use The target gray level located in the brightness trend consistent interval, and the gain coefficient corresponding to the target gray level located in the brightness trend consistent interval, the constant coefficient of the gain coefficient curve of the brightness trend consistent interval is obtained by fitting calculation, and the constant coefficient is determined as the uniformity compensation coefficient.
  • the display area of the display panel includes multiple sub-areas.
  • the gain coefficient corresponding to the target grayscale located in the consistent brightness trend interval includes the gain coefficient corresponding to the target grayscale located in the consistent brightness trend interval in each sub-region, and the constant coefficient of the gain coefficient curve in the consistent brightness trend interval includes each sub-region. The corresponding constant coefficient.
  • the target grayscale may include: performing uniformity compensation on the display panel to specify a selected grayscale and performing demura compensation on the display panel to specify a selected grayscale; or, performing uniformity compensation on the display panel and specifying a selected partial grayscale. Level and Demura compensation for the display panel to specify the selected partial gray level.
  • the target gray level includes the maximum gray level among the gray levels specified for shooting during the Demura compensation process.
  • the fourth aspect of this application also provides a display compensation device.
  • Figure 9 shows a display compensation device provided by an embodiment of the present application.
  • the display compensation device 400 includes a memory 401 , a processor 402 and a computer program stored on the memory 401 and executable on the processor 402 .
  • the above-mentioned processor 402 may include a central processing unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of embodiments of the present application.
  • CPU central processing unit
  • ASIC Application Specific Integrated Circuit
  • Memory 401 may include read-only memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical or other physical/tangible devices Memory storage device.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk storage media devices e.g., magnetic disks
  • optical storage media devices e.g., magnetic disks
  • flash memory devices e.g., electrical, optical or other physical/tangible devices Memory storage device.
  • memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or multiple processors), it is operable to perform operations described with reference to the display compensation method in the embodiment according to the first aspect of the present application.
  • the processor 402 reads the executable program code stored in the memory 401 to run a computer program corresponding to the executable program code, so as to implement the display compensation method in the above-mentioned embodiment of the first aspect.
  • display compensation device 400 may also include communication interface 403 and bus 404. Among them, as shown in Figure 9, the memory 401, the processor 402, and the communication interface 403 are connected through the bus 404 and complete communication with each other.
  • the communication interface 403 is mainly used to implement communication between modules, devices, units and/or equipment in the embodiments of this application. Input devices and/or output devices can also be accessed through the communication interface 403.
  • Bus 404 includes hardware, software, or both, coupling the components of display compensation device 400 to one another.
  • the bus 404 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, Industry Standard Architecture (ISA) bus, infinite bandwidth interconnect, low pin count (LPC) bus, memory bus, MicroChannel Architecture, MCA) bus, Peripheral Component Interconnect (PCI) bus, PCI-Express (PCI-E) bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association part (Video Electronics Standards Association Local Bus, VLB) bus or other suitable bus or a combination of two or more of these.
  • bus 404 may include one or more buses.
  • a fifth aspect of this application also provides a display device.
  • the display device includes a driver IC.
  • the driver IC stores the Demura compensation coefficient and the uniformity compensation coefficient obtained by the display compensation method in the embodiment of the first aspect.
  • the driver IC is used to read the Demura compensation coefficient and the uniformity compensation coefficient and perform the display in the embodiment of the second aspect. Compensation methods.
  • the display device may specifically include mobile phones, computers, tablets, televisions, electronic paper and other devices with display functions, which are not limited here.
  • a sixth aspect of the present application also provides a computer-readable storage medium.
  • Computer program instructions are stored on the computer-readable storage medium. When executed by a processor, the computer program instructions can implement the display compensation method in the embodiment of the first aspect. Or the display compensation method in the embodiment of the second aspect, and can achieve the same technical effect. To avoid duplication, it will not be described again here.
  • the above-mentioned computer-readable storage media may include non-transitory computer-readable storage media, such as read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), magnetic disks or optical disks etc. are not limited here.
  • Embodiments of the present application may also provide a computer program product.
  • the electronic device When instructions in the computer program product are executed by a processor of an electronic device, the electronic device causes the electronic device to execute the display compensation method in the first embodiment or the second embodiment.
  • the display compensation method can achieve the same technical effect. To avoid duplication, it will not be described again here.
  • Such a processor may be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It will also be understood that each block in the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can also be implemented by special purpose hardware that performs the specified functions or actions, or can be implemented by special purpose hardware and A combination of computer instructions.

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Abstract

本申请公开了一种显示补偿方法、装置、设备、介质及显示装置,属于显示技术领域。该方法包括:获取显示面板的两个以上目标灰阶的亮度参数,基于亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶;根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定灰阶的亮度趋势一致区间;针对显示面板全灰阶中的目标灰阶,利用Demura补偿算法,计算得到Demura补偿系数;针对显示面板的位于亮度趋势一致区间的目标灰阶,利用均一性补偿算法,计算得到均一性补偿系数;将Demura补偿系数和均一性补偿系数写入驱动IC,以使驱动IC根据Demura补偿系数和均一性补偿系数进行补偿。

Description

显示补偿方法、装置、设备、介质及显示装置
相关申请的交叉引用
本申请要求享有于2022年06月28日提交的名称为“显示补偿方法、装置、设备、介质及显示装置”的中国专利申请202210744996.1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
本申请属于显示技术领域,尤其涉及一种显示补偿方法、装置、设备、介质及显示装置。
背景技术
随着显示技术的快速发展,对显示面板的各类需求也逐渐增加,使得显示面板制作过程更为复杂、困难。制作过程的复杂化、困难化,容易使显示面板产生较大的光学特性差异。显示面板的光学特性差异会导致显示面板显示的均一性较差。
因此亟需一种能够提高显示面板显示的均一性的显示补偿方法。
发明内容
本申请实施例提供一种显示补偿方法、装置、设备、介质及显示装置,能够提高显示面板的均一性。
第一方面,本申请实施例提供一种显示补偿方法,包括:获取显示面板的全灰阶中两个以上目标灰阶的亮度参数,基于亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶;根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间;针对显示面板的全灰阶中的目标灰阶,利用Demura补偿算法,计算得到Demura补偿系数;针对显示面板的位于亮度趋势一致区间的目标灰阶, 利用均一性补偿算法,计算得到均一性补偿系数;将Demura补偿系数和均一性补偿系数写入驱动集成电路,以使驱动集成电路根据显示的灰阶读取Demura补偿系数和均一性补偿系数进行补偿。
第二方面,本申请实施例提供一种显示补偿方法,应用于显示装置中的驱动集成电路,驱动集成电路存储有第一方面的显示补偿方法得到的Demura补偿系数和均一性补偿系数,该方法包括:根据显示信号,确定显示的灰阶;在显示的灰阶包括位于亮度趋势一致区间的灰阶的情况下,读取存储的Demura补偿系数和均一性补偿系数,并根据显示的灰阶、Demura补偿系数和均一性补偿系数对显示信号进行补偿;在显示的灰阶不包括位于亮度趋势一致区间的灰阶的情况下,读取存储的Demura补偿系数,并根据显示的灰阶和Demura补偿系数对显示信号进行补偿。
第三方面,本申请实施例提供一种显示补偿装置,包括:一致性确定模块,用于获取显示面板的全灰阶中两个以上目标灰阶的亮度参数,基于亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶;区间确定模块,用于根据确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间;第一计算模块,用于针对显示面板的全灰阶中的目标灰阶,利用Demura补偿算法,计算得到Demura补偿系数;第二计算模块,用于针对显示面板的位于亮度趋势一致区间的目标灰阶,利用均一性补偿算法,计算得到均一性补偿系数;录入模块,用于将Demura补偿系数和均一性补偿系数写入驱动集成电路,以使驱动集成电路根据显示的灰阶读取Demura补偿系数和均一性补偿系数进行补偿。
第四方面,本申请实施例提供一种显示补偿设备,包括:处理器以及存储有计算机程序指令的存储器;处理器执行计算机程序指令时实现第一方面的显示补偿方法。
第五方面,本申请实施例提供一种显示装置,包括:驱动集成电路,驱动集成电路存储有第一方面显示补偿方法得到的Demura补偿系数和均一性补偿系数,驱动集成电路用于读取Demura补偿系数和均一性补偿系数,执行第二方面的显示补偿方法。
第六方面,本申请实施例提供一种计算机可读存储介质,计算机可读存储介质上存储有计算机程序指令,计算机程序指令被处理器执行时实现第一方面的显示补偿方法或第二方面的显示补偿方法。
本申请实施例提供一种显示补偿方法、装置、设备、介质及显示装置,可获取显示面板的多个目标灰阶的亮度参数,基于亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶。根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,可确定灰阶的亮度趋势一致区间。对显示面板的全灰阶中的目标灰阶利用Demura补偿算法,计算得到Demura补偿系数。对显示面板位于亮度趋势一致区间的目标灰阶利用均一性补偿算法,计算得到均一性补偿系数。将Demura补偿系数和均一性补偿系数写入驱动集成电路,Demura补偿系数对显示面板显示的全灰阶起作用,即Demura补偿会对显示面板显示的全灰阶产生补偿作用;均一性补偿系数只对显示面板显示的位于亮度趋势一致区间的灰阶起作用,即均一性补偿只会对显示面板显示的位于亮度趋势一致区间的灰阶产生补偿作用,从而避免Demura补偿的补偿效果和均一性补偿的补偿效果相互抵消,提高显示面板的均一性。
附图说明
图1为本申请一实施例提供的显示补偿方法的流程图;
图2为本申请另一实施例提供的显示补偿方法的流程图;
图3为本申请实施例中一种子区域划分的示意图;
图4为本申请又一实施例提供的显示补偿方法的流程图;
图5为本申请又另一实施例提供的显示补偿方法的流程图;
图6为本申请再一实施例提供的显示补偿方法的流程图;
图7为本申请一实施例提供的显示补偿方法的流程图;
图8为本申请一实施例提供的显示补偿装置的结构示意图;
图9为本申请一实施例提供的显示补偿设备的结构示意图。
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。
随着显示技术的快速发展,对显示面板的各类需求也逐渐增加,使得显示面板制作过程更为复杂、困难。制作过程的复杂化、困难化,容易使显示面板产生较大的光学特性差异。显示面板的光学特性差异会导致显示面板显示的均一性较差。为了提高均一性,会采用Demura补偿方式和针对电压降(IR Drop)的均一性补偿方式进行补偿,以期望提高显示面板显示的均一性。Demura补偿方式指点亮显示面板后,拍摄显示面板,获取显示面板的显示亮度,根据显示亮度,确定显示面板的Mura区域,对Mura区域进行处理,以消除Mura。针对电压降的均一性补偿方式指点亮显示面板后,对显示面板分多个区域进行拍摄,得到显示面板各区域的显示亮度,在多个区域的亮度相差较大的情况下,降低亮度过高的区域的显示亮度,和/或,提高亮度过低的区域的显示亮度。但在实际操作过程中,经两种补偿方式补偿后的显示的均一性并未得到较大提升。发明人经研究发现,Demura补偿方式和均一性补偿方式会相互削弱,从而使得经两种补偿方式补偿后的显示的均一性并未得到较大提升,显示面板显示的均一性仍然较差。
本申请提供一种显示补偿方法、装置、设备、介质及显示装置,能够根据显示面板在不同灰阶的亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶。根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,可确定显示面板亮度趋势一致的灰阶区间和亮度趋势不一致的灰阶区间。在亮度趋势不一致的灰阶区间内,会导致Demura补偿方式和均一性补偿方式的补偿效果相互抵消,因此只在灰阶位于亮度趋势一致的灰阶区间的情况下,采用Demura补偿方式和均一性补偿方式进行补偿,在亮度趋势不一致的灰阶区间只采用Demura补偿方式进行补偿,避 免两种补偿方式的作用相互抵消,从而提高显示面板显示的均一性。
下面对本申请提供的显示补偿方法、装置、设备、介质及显示装置分别进行说明。
本申请第一方面提供一种显示补偿方法,该显示补偿方法可应用于上位机等显示补偿装置或显示补偿设备,即该显示补偿方法可由上位机等显示补偿装置或显示补偿设备执行,在此并不限定。图1示出了本申请一实施例提供的显示补偿方法。如图1所示,该显示补偿方法可包括步骤S101至步骤S105。
在步骤S101中,获取显示面板的全灰阶中两个以上目标灰阶的亮度参数,基于亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶。
在对显示面板进行补偿的过程中,可在全灰阶中选取两个以上的灰阶,获取显示面板在选取的两个以上的灰阶下的亮度参数。选取的灰阶即为目标灰阶。目标灰阶的数目可根据实际应用场景、需求、经验等设定,例如,目标灰阶的数目考虑精确度和实施效率的平衡设定,在此并不限定。在一些示例中,目标灰阶可包括对显示面板进行均一性补偿指定选取的灰阶和对显示面板进行Demura补偿指定选取的灰阶,这里指定选取的灰阶可根据具体场景、需求、经验等设定,在此并不限定。在一些示例中,目标灰阶可包括对显示面板进行均一性补偿指定选取的部分灰阶和对显示面板进行Demura补偿指定选取的部分灰阶。以显示画面具有256级灰阶为例,即0至255,目标灰阶可包括显示画面的最大灰阶和进行Demura补偿过程中指定拍摄的灰阶中的最大灰阶,显示画面的最大灰阶为255,若Demura补偿过程中指定拍摄的灰阶包括224、192、128、64、32和16,则显示面板进行Demura补偿过程中指定拍摄的灰阶中的最大灰阶为224,对应地,目标灰阶可包括255和224,在目标灰阶包括255和224的基础上,目标灰阶还可包括其他灰阶,在此并不限定。
亮度参数用于表征亮度,可包括亮度、相对亮度或其他可表征亮度的参数,在此并不限定。在一些示例中,亮度参数可通过拍摄显示面板在目标灰阶下的显示得到。基于亮度参数,可确定显示面板的亮度趋势,亮度 趋势可表征亮度分布趋势。不同目标灰阶下,显示面板的亮度趋势可能一致,也可能不一致。可根据各目标灰阶的亮度参数,确定各目标灰阶的亮度趋势是否一致。目标灰阶的亮度趋势一致,则该目标灰阶为亮度趋势一致的目标灰阶。目标灰阶的亮度趋势不一致,则该目标灰阶为亮度趋势不一致的目标灰阶。
目标灰阶的亮度趋势是否一致可指不同的目标灰阶的亮度趋势是否一致,可通过不同目标灰阶的亮度分布确定。例如,显示面板显示的目标灰阶为255时显示面板从上至下亮度逐渐递减,显示面板显示的目标灰阶为224时显示面板从上至下亮度逐渐递减,即显示面板的目标灰阶224的亮度趋势与显示面板的目标灰阶255的亮度趋势一致,可认为显示面板的目标灰阶224的亮度趋势一致,即目标灰阶224为亮度趋势一致的目标灰阶。又例如,显示面板显示的目标灰阶为255时显示面板从上至下亮度逐渐递减,显示面板显示的目标灰阶为128时显示面板从上至下亮度逐渐递增,即显示面板的目标灰阶128的亮度趋势与显示面板的目标灰阶255的亮度趋势不一致,可认为显示面板的目标灰阶128的亮度趋势不一致,即目标灰阶128为亮度趋势不一致的目标灰阶。
目标灰阶的亮度趋势是否一致也可指同一目标灰阶下不同显示颜色的亮度趋势是否一致,可通过同一目标灰阶下不同显示颜色的亮度分布确定。例如,显示面板显示的目标灰阶为255,显示面板显示白色时显示面板从上至下亮度逐渐递减,显示面板分别显示绿色、蓝色、红色时显示面板从上至下亮度逐渐递减,即显示面板在目标灰阶255条件下显示白色的亮度趋势与显示面板显示绿色、蓝色、红色的亮度趋势一致,可认为显示面板的目标灰阶255的亮度趋势一致,即目标灰阶255为亮度趋势一致的目标灰阶。又例如,显示面板显示的目标灰阶为192,显示面板显示白色时显示面板从上至下亮度逐渐递减,显示面板分别显示绿色、蓝色、红色时显示面板从上至下亮度逐渐递增,即显示面板在目标灰阶192条件下显示白色的亮度趋势与显示面板显示绿色、蓝色、红色的亮度趋势不一致,可认为显示面板的目标灰阶192的亮度趋势不一致,即目标灰阶192为亮度趋势不一致的目标灰阶。
也可结合目标灰阶和显示颜色共同判定目标灰阶的亮度趋势是否一致,若目标灰阶和显示颜色各自均对应的亮度趋势一致,可认为目标灰阶的亮度趋势一致;若目标灰阶和显示颜色中有至少一者对应的亮度趋势不一致,可认为目标灰阶的亮度趋势不一致。
在步骤S102中,根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间。
根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,可判断出亮度趋势连续一致的灰阶区间和亮度趋势连续不一致的灰阶区间。亮度趋势连续一致的区间即可作为亮度趋势一致区间。全灰阶中除亮度趋势一致区间以外的其他灰阶区间为非亮度趋势一致区间。
在步骤S103中,针对显示面板的全灰阶中的目标灰阶,利用Demura补偿算法,计算得到Demura补偿系数。
全灰阶包括灰阶0至255,全灰阶中的目标灰阶即为选取的所有目标灰阶。可针对显示面板显示各个目标灰阶进行拍摄,采集亮度参数;根据采集的亮度参数和Demura补偿的期望亮度参数,计算得到Demura补偿系数,或者,可对采集的亮度参数进行Mura信号滤除处理,将提取到的点类Mura、线类Mura等滤除,以计算得到Demura补偿系数,对点类Mura、线类Mura等对应的位置进行显示修复。Demura补偿系数可用于参与显示面板任意一灰阶的Demura补偿计算,从而对显示面板任意一灰阶的显示进行Demura补偿。Demura补偿系数可为乘积系数,也可为偏移量,在此并不限定。
在步骤S104中,针对显示面板的位于亮度趋势一致区间的目标灰阶,利用均一性补偿算法,计算得到均一性补偿系数。
显示面板的灰阶位于非亮度趋势一致区间即亮度趋势不一致的区间的情况下,Demura补偿的补偿效果与均一性补偿的补偿效果会相互抵消。这里的均一性补偿主要指电压降均一性补偿(即IR Drop均一性补偿)。在本申请实施例中,在确定亮度趋势一致区间后,只针对位于亮度趋势一致区间的灰阶使用均一性补偿,对位于非亮度趋势一致区间的灰阶不使用均一性补偿。对应地,对位于亮度趋势一致区间的目标灰阶,采集显示面 板的亮度参数,可根据亮度参数和均一性补偿的期望亮度参数,计算得到均一性补偿系数。均一性补偿系数可用于参与显示面板位于亮度趋势一致区间中任一灰阶的均一性补偿计算,从而对显示面板位于亮度趋势一致区间中任一灰阶的显示进行均一性补偿。
在步骤S105中,将Demura补偿系数和均一性补偿系数写入驱动集成电路(Integrated Circuit,IC),以使驱动集成电路根据显示的灰阶读取Demura补偿系数和均一性补偿系数进行补偿。
在得到Demura补偿系数和均一性补偿系数后,可将Demura补偿系数和均一性补偿系数烧录入显示装置的驱动集成电路。若显示面板显示的灰阶包括位于亮度趋势一致区间的灰阶,则显示面板读取Demura补偿系数和均一性补偿系数,并利用显示面板显示的灰阶、Demura补偿系数和均一性补偿系数进行Demura补偿和均一性补偿,其中,均一性补偿只作用于位于亮度趋势一致区间的灰阶。若显示面板显示的灰阶不包括位于亮度趋势一致区间的灰阶,则显示面板读取Demura补偿系数,并利用显示面板显示的灰阶和Demura补偿系数进行Demura补偿。
在本申请实施例中,可获取显示面板的多个目标灰阶的亮度参数,基于亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶。根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,可确定灰阶的亮度趋势一致区间。对显示面板的全灰阶中的目标灰阶利用Demura补偿算法,计算得到Demura补偿系数。对显示面板位于亮度趋势一致区间的目标灰阶利用均一性补偿算法,计算得到均一性补偿系数。将Demura补偿系数和均一性补偿系数写入驱动集成电路,Demura补偿系数对显示面板显示的全灰阶起作用,即Demura补偿会对显示面板显示的全灰阶产生补偿作用;均一性补偿系数只对显示面板显示的位于亮度趋势一致区间的灰阶起作用,即均一性补偿只会对显示面板显示的位于亮度趋势一致区间的灰阶产生补偿作用,从而避免Demura补偿的补偿效果和均一性补偿的补偿效果相互抵消,提高显示面板的均一性。
均一性补偿在补偿效果能够起作用的情况下,对电压降引发的均一性问题能够起到补偿作用。Demura补偿在补偿效果能够起作用的情况下, 一方面能够对显示面板的Mura进行修复补偿,另一方面也可对均一性起到补偿作用。在均一性补偿的补偿效果与Demura补偿的补偿效果不会抵消的情况下,能够改善显示面板的均一性。
本申请实施例提供的显示补偿方法与始终同时采用Demura补偿和均一性补偿的方法相比,显示面板的均一性大幅度提高。在相同数量的显示面板中,采用本申请实施例提供的显示补偿方法进行补偿的显示面板均一性满足标准的数量百分比相较于始终同时采用Demura补偿和均一性补偿的方法可提高21.4%或更高。对进行补偿后的显示面板进行均一性检测,在显示面板的显示区域选取多个区域检测均一性,针对相同的显示面板,采用本申请实施例提供的显示补偿方法进行补偿的多个区域的均一性的平均值、最小值、最大值均高于始终同时采用Demura补偿和均一性补偿的方法。由此可以看出,本申请实施例提供的显示补偿方法可大幅度提高显示面板的均一性。
在一些实施例中,可将显示面板的显示区域划分为两个以上的子区域,通过每一子区域在不同灰阶下的对比,确定目标灰阶的亮度趋势是否一致。图2示出了本申请另一实施例提供的显示补偿方法。图2与图1的不同之处在于,图1中的步骤S101可具体细化为步骤S1011a至步骤S1015a。
在步骤S1011a中,将显示面板的显示区域划分为N 1个子区域。
N 1为大于或等于2的整数。N 1个子区域的大小、形状可以相同,也可不同,在此并不限定。
在步骤S1012a中,基于N 1个子区域的亮度参数,确定N 1个子区域中每一子区域的不同目标灰阶的亮度表征值。
在不同目标灰阶的条件下,获取N 1个子区域的亮度参数。显示面板的亮度参数在正常情况下也会随着灰阶的不同而不同,为了使得不同目标灰阶的亮度参数有可对比性,可对亮度参数进行处理,得到亮度表征值。亮度表征值用于表征亮度,且不同目标灰阶下的亮度表征值具有可比性。通过亮度表征值的比对,可确定目标灰阶的亮度趋势是否一致。
一个子区域的亮度表征值可根据这一子区域的亮度参数和目标灰阶对 应的参照亮度参数确定。例如,可将这一子区域的亮度参数与目标灰阶对应的参照亮度参数的比值作为这一子区域的亮度表征值。
在一些示例中,参照亮度参数可包括预先指定的亮度参数。不同目标灰阶对应的参照亮度参数可不同。例如,可执行灰阶255的参照亮度参数为Lv,其他目标灰阶值对应的参照亮度参数L’可根据下式(1)计算:
L’=Lv×(x/255) γ      (1)
其中,x为目标灰阶,γ为伽马系数。一个子区域在目标灰阶的亮度表征值可为该子区域在目标灰阶的亮度参数与目标灰阶值对应的参照亮度参数的比值。
在一些示例中,参照亮度参数可包括任意一个子区域的亮度参数。一个子区域在目标灰阶的亮度表征值可为这一子区域在目标灰阶的亮度参数与任意一个子区域在目标灰阶的亮度参数的比值。例如,图3为本申请实施例中一种子区域划分的示意图,图3中左图为目标灰阶255下的显示区域,图3中右图为目标灰阶224下的显示区域,显示区域分为三个子区域,三个子区域在图3中标示为①、②和③,可选择各目标灰阶的子区域②的亮度参数为参照亮度参数,则各目标灰阶的子区域②的亮度表征值为1。
在步骤S1013a中,获取每一子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的第一差距值。
目标灰阶包括最大灰阶,最大灰阶为255。为了保证各目标灰阶的亮度趋势是否一致的判定更准确,需选取一个灰阶作为参照灰阶,在本申请实施例中选取最大灰阶255为参照灰阶。第一差距值用于表征子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值之间的差距,第一差距值可为子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的差值的绝对值,也可为该差值的绝对值与最大灰阶的亮度表征值的比值,在此并不限定,为了便于说明,这里将子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的差值的绝对值称为目标绝对值。
在步骤S1014a中,在第一差距值大于或等于第一一致阈值的子区域的数量满足第一预设条件的情况下,确定目标灰阶为亮度趋势不一致的目 标灰阶。
第一一致阈值为判断不同灰阶下单个子区域的亮度趋势是否一致的判断阈值。第一差距值大于或等于第一一致阈值,表示该子区域的亮度趋势不一致。但判断显示面板的显示区域整体在目标灰阶下的亮度趋势是否一致,还需参考亮度趋势不一致的子区域的数量。第一预设条件包括表征显示面板的显示区域整体在目标灰阶下的亮度趋势不一致的判定条件,与亮度趋势不一致的子区域的数量相关。例如,第一预设条件包括第一差距值大于或等于第一一致阈值的子区域的数量大于或等于第一数量阈值,第一数量阈值可根据场景、需求、经验等设定,在此并不限定,如第一数量阈值为1或其他正整数。又例如,第一预设条件包括第一差距值大于或等于第一一致阈值的子区域的数量占子区域总数量的占比大于或等于第一占比阈值,第一占比阈值可根据场景、需求、经验等设定,在此并不限定,如第一占比阈值可为1/3、2/5等。第一差距值大于或等于第一一致阈值的子区域的数量满足第一预设条件,表示显示面板的显示区域整体在目标灰阶下的亮度趋势不一致,可认为该目标灰阶为亮度趋势不一致的目标灰阶。
在步骤S1015a中,在第一差距值大于或等于第一一致阈值的子区域的数量不满足第一预设条件的情况下,确定目标灰阶为亮度趋势一致的目标灰阶。
第一差距值大于或等于第一一致阈值的子区域的数量不满足第一预设条件,表示显示面板的显示区域整体在目标灰阶下的亮度趋势一致,可认为该目标灰阶为亮度趋势一致的目标灰阶。
例如,若子区域的分布如图3所示,图3中左图为目标灰阶为最大灰阶即灰阶255下的显示区域,图3中右图为目标灰阶224下的显示区域。假设图3左图中的子区域①、②和③的亮度表征值分别为0.95、1.00和1.08,图3右图中的子区域①、②和③的亮度表征值分别为1.05、1.00和0.94,第一差距值为子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的差值的绝对值与最大灰阶的亮度表征值的比值,第一一致阈值为8%,第一预设条件包括第一差距值大于或等于第一一致阈值的子区域的数量占子区域总数量的占比大于或等于第一占比阈值,第一占比阈值为 1/3,则子区域①对应的第一差距值为∣1.05-0.95∣/0.95=10.5%,子区域①对应的第一差距值大于第一一致阈值8%,子区域③对应的第一差距值为∣0.94-1.08∣/1.08=12.96%,子区域③对应的第一差距值大于第一一致阈值8%,第一差距值大于或等于第一一致阈值的子区域的数量占子区域总数量的占比为2/3,大于第一占比阈值1/3,可确定目标灰阶224为亮度趋势不一致的目标灰阶。
在上述实施例中,对于显示面板的最大灰阶,可采集显示面板在最大灰阶显示不同颜色情况下各子区域的亮度参数,根据亮度参数,确定各子区域最大灰阶不同显示颜色下的亮度表征值,通过同一子区域最大灰阶不同显示颜色的亮度表征值之间的差距值与一致阈值的对比,以及差距值大于或等于一致阈值的子区域的数量和预设条件,确定最大灰阶是否为亮度趋势一致的目标灰阶。差距值、一致阈值、预设条件可参见上述实施例中的第一差距值、第一一致阈值、第一预设条件的相关内容,但差距值、一致阈值、预设条件中的具体取值可与上述实施例中的第一差距值、第一一致阈值、第一预设条件不同。
将显示面板的显示区域划分为多个子区域,通过子区域的亮度趋势来判断显示面板整体的亮度趋势是否一致,可提高显示面板整体的亮度趋势是否一致的判定精度,以提高后续得到亮度趋势一致区间的精确度,提高补偿精度,从而进一步提高显示面板显示的均一性。
在一些实施例,可将显示面板的显示区域划分为两个以上的子区域,通过同一子区域在不同灰阶和同一灰阶下不同颜色下的对比,确定目标灰阶的亮度趋势是否一致。图4示出了本申请又一实施例提供的显示补偿方法。图4与图1的不同之处在于,图1中的步骤S101可具体细化为步骤S1011b至步骤S1015b。
在步骤S1011b中,将显示面板的显示区域划分为N 2个子区域。
N 2为大于或等于2的整数。N 2与N 1可以相等,也可以不等。划分子区域的具体内容可参见上述实施例中的相关说明,在此不再赘述。
在步骤S1012b中,基于N 2个子区域的亮度参数,确定N 2个子区域中每一子区域的不同目标灰阶的亮度表征值,以及每一子区域在同一目标灰 阶的第一显示颜色的亮度表征值和第二显示颜色的亮度表征值。
在不同目标灰阶条件下,获取N 2个子区域的亮度参数。目标灰阶包括最大灰阶。在每个目标灰阶的不同显示颜色的条件下,获取N 2个子区域的亮度参数。例如,显示颜色包括白色、红色、绿色和蓝色,可获取每个目标灰阶下,显示白色的N 2个子区域的亮度参数、显示红色的N 2个子区域的亮度参数、显示绿色的N 2个子区域的亮度参数和显示蓝色的N 2个子区域的亮度参数。
同一子区域的不同目标灰阶的亮度表征值的具体内容可参见上述实施例中的相关说明,在此不再赘述。
在一些示例中,第一显示颜色为白色,第二显示颜色为红色、绿色、蓝色中的至少一种。一般情况下,红色、绿色、蓝色所对应的显示面板整体、以及子区域的亮度趋势是相同的,例如,红色对应的显示面板整体的亮度趋势一致,则绿色对应的显示面板整体的亮度趋势也一致,蓝色对应的显示面板整体的亮度趋势也一致。为了进一步加快得到亮度趋势一致区间的速度,第二显示颜色可选择红色、绿色、蓝色中的一种。
显示面板的亮度参数可能会随着显示颜色的不同而不同,为了使得同一目标灰阶的不同显示颜色的亮度参数有可对比性,可对亮度参数进行处理,得到亮度表征值。亮度表征值用于表征亮度,且不同显示颜色的亮度表征值具有可比性。通过同一目标灰阶的不同显示颜色的亮度表征值的比对,也可协助确定目标灰阶是否为亮度趋势一致的目标灰阶。
第一显示颜色的亮度表征值和第二显示颜色的亮度表征值可根据子区域的亮度参数和目标灰阶对应的参照亮度参数确定,具体内容可参见上述实施例中亮度表征值的相关说明,在此不再赘述。
在步骤S1013b中,获取每一子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的第二差距值,以及每一子区域在同一目标灰阶的第一显示颜色的亮度表征值与第二显示颜色的亮度表征值的第三差距值。
子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的第二差距值的具体内容可参见上述实施例中第一差距值的相关说明,在此不再赘述。
在本实施例中,除了通过每一子区域在不同灰阶下的亮度趋势协助确定显示面板整体的亮度趋势以外,还可通过每一子区域在相同目标灰阶但不同显示颜色情况下的亮度趋势协助确定显示面板整体的亮度趋势。
第三差距值用于表征子区域显示第一显示颜色的亮度表征值与显示第二显示颜色的亮度表征值之间的差距,第三差距值可为子区域显示第一显示颜色的亮度表征值与第二显示颜色的亮度表征值的差值的绝对值,也可为该差值的绝对值与显示第一显示颜色的亮度表征值的比值,在此并不限定。
在步骤S1014b中,在第二差距值超出第二一致阈值的子区域的数量满足第二预设条件,或,在第三差距值超出第三一致阈值的子区域的数量满足第三预设条件的情况下,确定目标灰阶为亮度趋势不一致的目标灰阶。
第二差距值超出第二一致阈值的子区域的数量满足第二预设条件的具体内容可参见上述实施例中的相关说明,在此不再赘述。第二一致阈值具体可参见上述实施例中的第一一致阈值,第二预设条件具体可参见上述实施例中的第一预设条件。
第三一致阈值为用于判断不同灰阶下单个子区域的亮度趋势是否一致的判断阈值。第三差距值大于或等于第三一致阈值,表示该子区域的亮度趋势不一致。但判断显示面板的显示区域整体在目标灰阶下的亮度趋势是否一致,还需参考不同显示颜色的亮度趋势不一致的子区域的数量。第三预设条件包括表征显示面板的显示区域整体在不同显示颜色的亮度趋势不一致的判定条件,与亮度趋势不一致的子区域的数量相关。例如,第三预设条件包括第三差距值大于或等于第三一致阈值的子区域的数量大于或等于第三数量阈值,第三数量阈值可根据场景、需求、经验等设定,在此并不限定,如第三数量阈值为1或其他正整数。又例如,第三预设条件包括第三差距值大于或等于第三一致阈值的子区域的数量占子区域总数量的占比大于或等于第三占比阈值,第三占比阈值可根据场景、需求、经验等设定,在此并不限定,如第三占比阈值可为1/3、2/5等。第三差距值大于或等于第三一致阈值的子区域的数量满足第三预设条件,表示显示面板的显 示区域整体在目标灰阶下不同显示颜色的亮度趋势不一致。
第二预设条件和第三预设条件中的一个满足,即可确定目标灰阶的亮度趋势不一致。
在步骤S1015b中,在第二差距值超出第二一致阈值的子区域的数量不满足第二预设条件,且在第三差距值超出第三一致阈值的子区域的数量不满足第三预设条件的情况下,确定目标灰阶为亮度趋势一致的目标灰阶。
第二预设条件和第三预设条件均不满足,才可确定目标灰阶的亮度趋势一致。第二预设条件和第三预设条件的具体内容可参见上述实施例中的相关说明,在此不再赘述。
在上述实施例中,对于显示面板的最大灰阶,可根据第三差距值、第三一致阈值、第三预设条件,确定最大灰阶的亮度趋势是否一致。第三差距值、第三一致阈值、第三预设条件的具体内容可参见上述实施例中的相关说明,在此不再赘述。
将显示面板的显示区域划分多个子区域,通过子区域的在不同目标灰阶下亮度趋势,以及同一目标灰阶的不同显示颜色下的亮度趋势来判断显示面板整体的亮度趋势是否一致,可提高显示面板整体的亮度趋势是否一致的判定精度,以提高后续得到亮度趋势一致区间的精确度,提高补偿精度,从而进一步提高显示面板显示的均一性。
在一些实施例中,目标灰阶包括最大灰阶,最大灰阶为255,可通过从亮度趋势一致跳转到亮度趋势不一致的目标灰阶,确定亮度趋势一致区间。图5示出了本申请又另一实施例提供的显示补偿方法。图5与图1的不同之处在于,图1中的步骤S102可具体细化为图5中的步骤S1021和步骤S1022,或者,图1中的步骤S102可具体细化为图5中的步骤S1023和步骤S1024,或者,图1中的步骤S102可具体细化为图5中的步骤S1025至步骤S1027。
在步骤S1021中,按照目标灰阶由大至小的顺序,在目标灰阶中查找第一目标灰阶。
第一目标灰阶为第一个亮度趋势不一致的目标灰阶。可按照目标灰阶 由大至小的顺序依次确定目标灰阶的亮度趋势是否一致,在该过程中将第一个亮度趋势不一致的目标灰阶确定为第一目标灰阶。
在步骤S1022中,根据第一目标灰阶,确定亮度趋势一致区间。
亮度趋势一致区间的上限值为最大灰阶,亮度趋势一致区间的下限值为第一目标灰阶。全灰阶中除亮度趋势一致区间以外的区域为非亮度趋势一致区间,非亮度趋势一致区间可视为亮度趋势不一致的灰阶区间。例如,若第一目标灰阶为Dn,则亮度趋势一致区间为(Dn,255],非亮度趋势一致区间为(0,Dn]。
需要说明的是,若最大灰阶的亮度趋势不一致,则可将255作为亮度趋势一致区间,(0,254]为非亮度趋势一致区间。
为了便于说明,下面以一表格来说明确定通过步骤S1021和步骤S1022确定亮度趋势一致区间的方式,如下表一所示:
表一
目标灰阶255 目标灰阶224 目标灰阶128 亮度趋势一致区间
1 1 1 (待定值,255]
1 1 0 (128,255]
1 0 1 (224,255]
1 0 0 (224,255]
0 1 1 255
0 1 0 255
0 0 1 255
0 0 0 255
其中,1表示亮度趋势一致,0表示亮度趋势不一致。在目标灰阶255、目标灰阶224、目标灰阶128均为亮度趋势一致的情况下,由于还未出现亮度趋势不一致的目标灰阶,可取更多的目标灰阶,直至出现亮度趋势不一致的目标灰阶,待定值为后续出现的第一个亮度趋势不一致的目标灰阶。在目标灰阶255、目标灰阶224的亮度趋势一致,目标灰阶128的亮度趋势不一致的情况下,按照目标灰阶由大至小的顺序,目标灰阶128为第一个亮度趋势不一致的目标灰阶,因此,亮度趋势一致区间为(128, 255],非亮度趋势一致区间为(0,128]。在目标灰阶255的亮度趋势一致,目标灰阶224、目标灰阶128的亮度趋势不一致的情况下,按照目标灰阶由大至小的顺序,目标灰阶224为第一个亮度趋势不一致的目标灰阶,因此,亮度趋势一致区间为(224,255],非亮度趋势一致区间为(0,224]。在目标灰阶255、目标灰阶128的亮度趋势一致,目标灰阶224的亮度趋势不一致的情况下,按照目标灰阶由大至小的顺序,目标灰阶224为第一个亮度趋势不一致的目标灰阶,因此,亮度趋势一致区间为(224,255],非亮度趋势一致区间为(0,224]。在目标灰阶255的亮度趋势不一致即目标灰阶255为第一目标灰阶的情况下,可不再关注其他灰阶的亮度趋势。
在一些示例中,可预先选取固定数量的目标灰阶,若固定数量的目标灰阶中包括第一目标灰阶,在获取到第一目标灰阶后,可不再判定小于第一目标灰阶的其他目标灰阶的亮度趋势是否一致。
在一些示例中,可预先选取固定数量的目标灰阶,若固定数量的目标灰阶中不包括第一目标灰阶,可继续获取更小的目标灰阶,判定新获取的目标灰阶的亮度趋势是否一致,直至出现第一目标灰阶。
在一些示例中,可预先在全灰阶0至255中较为均匀地选取多个候选灰阶,依次将候选灰阶作为目标灰阶,按照目标灰阶由大至小的顺序,对候选灰阶进行亮度趋势是否一致的判定,直至得到第一目标灰阶,可不对小于第一目标灰阶的其他候选灰阶的亮度趋势是否一致进行判定。
在步骤S1021和步骤S1022中,主要关注目标灰阶按照由大至小的顺序的第一个亮度趋势不一致的目标灰阶即第一目标灰阶,并不关注在第一目标灰阶之后是否还具有亮度趋势一致的灰阶,这样做可节省运算资源,减少确定亮度趋势一致区间所花费的时间,提高显示补偿的效率,可达到显示补偿的效率和显示补偿效果较优的平衡。
在步骤S1023中,按照目标灰阶由大至小的顺序,在目标灰阶中查找第一类灰阶和第二类灰阶。
第一类灰阶包括亮度趋势不一致且与前一目标灰阶的亮度趋势不同的目标灰阶。也就是说,第一类灰阶的亮度趋势不一致,且按照目标灰阶由 大至小的顺序,第一类灰阶的前一目标灰阶的亮度趋势一致。第一类灰阶可被视为从亮度趋势一致到亮度趋势不一致的灰阶的转折点。
第二类灰阶包括亮度趋势一致且与前一目标灰阶的亮度趋势不同的目标灰阶。也就是说,第二类灰阶的亮度趋势一致,且按照目标灰阶由大至小的顺序,第二类灰阶的前一目标灰阶的亮度趋势不一致。第二类灰阶可被视为从亮度趋势不一致到亮度趋势一致的灰阶的转折点。
在步骤S1024中,按照目标灰阶由大至小的顺序,将最大灰阶到第一个第一类灰阶的区间,第二类灰阶到相邻的第一类灰阶的区间,和/或,最小的第二类灰阶到最小灰阶的区间确定为亮度趋势一致区间。
最大灰阶到第一个第一类灰阶的区间不包括第一个第一类灰阶。第二类灰阶到相邻的第一类灰阶的区间可不包括该相邻的第一类灰阶。
在一些示例中,若最大灰阶的亮度趋势一致,亮度趋势一致区间包括最大灰阶到第一个第一类灰阶的区间。
全灰阶中除亮度趋势一致区间以外的其他区间为非亮度趋势一致区间。
为了便于说明,下面以一表格来说明通过步骤S1023和步骤S1024确定亮度趋势一致区间的方式,如下表二所示:
表二
Figure PCTCN2022122281-appb-000001
Figure PCTCN2022122281-appb-000002
其中,1表示亮度趋势一致,0表示亮度趋势不一致,每一行表示一种情况。在第一种情况下,第一类灰阶包括目标灰阶64,第二类灰阶包括目标灰阶16,对应地,亮度趋势一致区间包括(64,255]和(0,16],非亮度趋势一致区间包括(16,64]。在第二种情况下,第一类灰阶包括目标灰阶224和目标灰阶32,第二类灰阶包括目标灰阶64,对应地,亮度趋势一致区间包括(224,255]和(32,64],非亮度趋势一致区间包括(64,224]和(0,32]。在第三种情况下,第一类灰阶包括目标灰阶224和目标灰阶64,第二类灰阶包括目标灰阶128和目标灰阶32,对应地,亮度趋势一致区间包括(224,255]、(64,128]和(0,32],非亮度趋势一致区间包括(128,224]和(32,64]。在第四种情况下,第一类灰阶包括目标灰阶32,第二类灰阶包括目标灰阶224,对应地,亮度趋势一致区间包括(32,224],非亮度趋势一致区间包括(224,255]和(0,32]。在第五种情况下,第一类灰阶包括目标灰阶128和目标灰阶16,第二类灰阶包括目标灰阶224和目标灰阶64,对应地,亮度趋势一致区间包括(128,224]和(16,64],非亮度趋势一致区间包括(224,255]、(64,128]和(0,16]。在第六种情况下,第一类灰阶包括目标灰阶64,第二类灰阶包括目标灰阶128和目标灰阶32,对应地,亮度趋势一致区间包括(64,128]和(0,32],非亮度趋势一致区间包括(128,255]和(32,64]。
在步骤S1023和步骤S1024中,关注全灰阶中的每个亮度趋势一致的区间和亮度趋势不一致的区间,使得确定的亮度趋势一致区间更加精准,进一步提高显示面板的补偿效果,从而进一步提高显示面板显示的均一性。
在步骤S1025中,获取高亮灰阶区间。
高亮灰阶区间为预先设定的表征高亮度的灰阶区域,具体可设置一高亮灰阶阈值,高亮灰阶区间为灰阶大于或等于该高亮灰阶阈值的灰阶区域。全灰阶中除高亮灰阶区间以外的灰阶区域为低亮灰阶区域,具体地, 低亮灰阶区域可包括灰阶小于高亮灰阶阈值的灰阶区域。
在步骤S1026中,在高亮灰阶区间中,按照目标灰阶由大至小的顺序,在目标灰阶中查找第三类灰阶和第四类灰阶。
第三类灰阶包括亮度趋势不一致且与前一目标灰阶的亮度趋势一致性不同的目标灰阶。也就是说,第三类灰阶位于高亮灰阶区间,第三类灰阶的亮度趋势不一致,且按照目标灰阶由大至小的顺序,第三类灰阶的前一目标灰阶的亮度趋势一致。第三类灰阶可被视为高亮灰阶区间内亮度趋势一致到亮度趋势不一致的灰阶的转折点。
第四类灰阶包括亮度趋势一致且与前一目标灰阶的亮度趋势一致性不同的目标灰阶。也就是说,第四类灰阶位于高亮灰阶区间,第四类灰阶的亮度趋势一致,且按照目标灰阶由大至小的顺序,第四类灰阶的前一目标灰阶的亮度趋势不一致。第四类灰阶可被视为高亮灰阶区间内亮度趋势不一致到亮度趋势一致的灰阶的转折点。
在步骤S1027中,按照目标灰阶由大至小的顺序,将高亮灰阶区间中最大灰阶到第一个第三类灰阶的区间,第四类灰阶到相邻的第三类灰阶的区间,和/或,最小的第四类灰阶到最小灰阶的区间确定为亮度趋势一致区间。
最大灰阶到第一个第三类灰阶的区间不包括第一个第三类灰阶。第四类灰阶到相邻的第三类灰阶的区间可不包括该相邻的第三类灰阶。
在一些示例中,若最大灰阶的亮度趋势一致,亮度趋势一致区间包括最大灰阶到第一个第三类灰阶的区间。
在一些示例中,高亮灰阶区间中距离高亮灰阶区间的下限值即高亮灰阶阈值最近的目标灰阶为第四类灰阶的情况下,亮度趋势一致区间包括最小的第四类灰阶到最小灰阶的区间。
这里的最小灰阶可包括全灰阶中的灰阶最小值或高亮灰阶区间中的灰阶最小值。例如,全灰阶为[0,255],高亮灰阶区间为[64,255],全灰阶中的灰阶最小值为0,高亮灰阶区间中的灰阶最小值为64。
全灰阶中除亮度趋势一致区间以外的其他区间为非亮度趋势一致区间。
为了便于说明,下面以一表格来说明通过步骤S1025至步骤S1027确定亮度趋势一致区间的方式,其中,高亮灰阶区间为[64,255],最小灰阶可包括全灰阶中的灰阶最小值,如下表三所示:
表三
Figure PCTCN2022122281-appb-000003
其中,1表示亮度趋势一致,0表示亮度趋势不一致,每一行表示一种情况。在第一种情况下,第三类灰阶包括目标灰阶64,无第四类灰阶,对应地,亮度趋势一致区间包括(64,255],非亮度趋势一致区间包括(0,64]。在第二种情况下,第三类灰阶包括目标灰阶224,第四类灰阶包括目标灰阶64,对应地,亮度趋势一致区间包括(224,255],非亮度趋势一致区间包括(0,224]。在第三种情况下,第三类灰阶包括目标灰阶224和目标灰阶64,第四类灰阶包括目标灰阶128,对应地,亮度趋势一致区间包括(224,255]和(64,128],非亮度趋势一致区间包括(128,224]和(0,64]。在第四种情况下,无第三类灰阶,第四类灰阶包括目标灰阶224,对应地,亮度趋势一致区间包括(0,224],非亮度趋势一致区间包括(224,255]。在第五种情况下,第三类灰阶包括目标灰阶128,第四类灰阶包括目标灰阶224和目标灰阶64,对应地,亮度趋势一致区间包括(128,224],非亮度趋势一致区间包括(224,255]和(0,128]。在第六种情况下,第三类灰阶包括目标灰阶64,第四类灰阶包括目标灰阶128,对应地,亮度趋势一致区间包括(64,128],非亮度趋势一致区间包括(128,255]和(0,64]。
为了便于理解,这里以表三所示的第四种情况为例,来说明最小灰阶包括高亮灰阶区间中的灰阶最小值条件下的亮度趋势一致区间和非亮度趋势一致区间,在第四种情况下,无第三类灰阶,第四类灰阶包括目标灰阶224,对应地,非亮度趋势一致区间包括(224,255],亮度趋势一致区间包括(64,224],(0,64]可确定为非亮度趋势一致区间,也可确定为亮度趋势一致区间。
均一性问题在高亮度条件下即灰阶位于高亮灰阶区间的情况下更为明显,对显示效果影响较大。均一性问题在低亮度条件下即灰阶不在高亮灰阶区间的情况下,用户肉眼难以察觉,对显示效果影响非常小,可忽略不计。在步骤S1025至步骤S1027中,略去非高亮灰阶区间中灰阶的亮度趋势是否一致,主要关注高亮灰阶区间中目标灰阶的亮度趋势是否一致,能够在提高均一性效果的基础上,减小计算资源等的消耗,进一步提高显示补偿的效率。
在一些实施例中,可通过数据拟合的方式得到均一性补偿系数。图6示出了本申请再一实施例提供的显示补偿方法。图6与图1的不同之处在于,图1中的步骤S104可具体细化为图6中的步骤S1041和步骤S1042。
在步骤S1041中,针对显示面板的位于亮度趋势一致区间的目标灰阶,利用均一性补偿算法,得到位于亮度趋势一致区间的目标灰阶对应的增益系数。
可采集显示面板显示位于亮度趋势一致区间的目标灰阶的亮度参数,根据亮度参数和期望亮度参数,利用均一性补偿算法,计算得到位于亮度趋势一致区间的各目标灰阶对应的增益系数。增益系数可用于对原显示信号中位于亮度趋势一致区间的目标灰阶对应的部分进行补偿,以使显示面板显示位于亮度趋势一致区间的目标灰阶时,采集的亮度参数能够与期望亮度参数相同或趋于相同。
在步骤S1042中,利用位于亮度趋势一致区间的目标灰阶,以及位于亮度趋势一致区间的目标灰阶对应的增益系数,拟合计算得到亮度趋势一致区间的增益系数曲线的常数系数,并将常数系数确定为均一性补偿系数。
位于亮度趋势一致区间的每个目标灰阶对应有一个增益系数。可将位于亮度趋势一致区间的每个目标灰阶以及目标灰阶对应的增益系数转化为坐标点(目标灰阶,增益系数),建立常数系数未知的均一性补偿增益算式,均一性补偿增益算式用于表征亮度趋势一致区间的增益系数曲线。增益系数曲线为增益系数与灰阶的关系曲线。利用位于亮度趋势一致区间的各目标灰阶对应的坐标点,对均一性补偿增益算式的常数系数求解,得到常数系数。常数系数已知的均一性补偿增益算式能够准确地表征亮度趋势一致区间的增益系数曲线。该常数系数即为均一性补偿所需的均一性补偿系数。拟合计算的算法可包括最小二乘法等拟合算法,在此并不限定。
例如,可建立均一性补偿增益算式,均一性补偿增益算式如下式(2)所示:
y=a+bx        (2)
其中,a、b为常数系数,目前未知;x为灰阶,y为增益系数。
可利用最小二乘法计算得到常数系数a和b的具体取值,具体计算过程可如下式(3)至(6):
Figure PCTCN2022122281-appb-000004
Figure PCTCN2022122281-appb-000005
Figure PCTCN2022122281-appb-000006
Figure PCTCN2022122281-appb-000007
其中,x i为亮度趋势一致区间的第i个目标灰阶,亮度趋势一致区间包括n+1个目标灰阶,n为整数;y i为亮度趋势一致区间的第i个目标灰阶对应的增益系数。例如,若亮度趋势一致区间包括3个目标灰阶,目标灰阶分别为255、224和128,目标灰阶255对应的增益系数为G1,目标灰阶224对应的增益系数为G2,目标灰阶128对应的增益系数为G3,可利用三个坐标点(255,G1)、(224,G2)和(128,G3)作为(x 1,y 1)、(x 2,y 2)和 (x 3,y 3)代入上式(3)至(6),计算得到常数系数a和b。
通过上式(3)至(6),可求得常数系数a和b,常数系数a和b即为均一性补偿系数。将常数系数a和b代入式(2),即可得到用于表征亮度趋势一致区间的增益系数曲线的均一性补偿增益算式。均一性补偿增益算式可写入显示面板,在将均一性补偿系数写入显示面板后,显示面板可读取均一性补偿系数,并运行均一性补偿增益算式,计算得到增益系数,利用增益系数在亮度趋势一致区间的情况下对显示信号进行补偿。
在一些示例中,显示面板的显示区域包括多个子区域。对应地,位于亮度趋势一致区间的目标灰阶对应的增益系数包括位于亮度趋势一致区间的目标灰阶在各子区域对应的增益系数,亮度趋势一致区间的增益系数曲线的常数系数包括各子区域对应的常数系数。每个子区域对应的常数系数的计算均可通过步骤S1041和步骤S1042计算得到,例如,每个子区域对应的常数系数可根据上式(2)至(6)计算得到。不同子区域的增益系数可不同,不同子区域对应的常数系数也可不同。可将各子区域对应的常数系数写入显示面板,显示面板可读取各子区域对应的常数系数,按照子区域的划分,对各子区域分别进行均一性补偿。分子区域进行均一性补偿,可进一步增加均一性补偿的精度,从而进一步提高显示面板显示的均一性。
本申请第二方面提供一种显示补偿方法,应用于显示装置中的驱动IC,即该显示补偿方法可由驱动IC执行。驱动IC存储有上述第一方面实施例得到并写入驱动IC的Demura补偿系数和均一性补偿系数。图7示出了本申请一实施例提供的显示补偿方法的流程图。如图7所示,该显示补偿方法可包括步骤S201至步骤S203。
在步骤S201中,根据显示信号,确定显示的灰阶。
显示信号为用于表征显示图像的信号。显示面板根据显示信号显示图像。通过显示信号可确定显示图像对应的灰阶。
在步骤S202中,在显示的灰阶包括位于亮度趋势一致区间的灰阶的情况下,读取存储的Demura补偿系数和均一性补偿系数,并根据显示的灰阶、Demura补偿系数和均一性补偿系数对显示信号进行补偿。
显示的灰阶包括位于亮度趋势一致区间的灰阶,需要对显示信号中与位于亮度趋势一致区间的灰阶对应的部分,利用均一性补偿系数和Demura补偿系数进行补偿;再利用补偿后的显示信号进行图像显示。
在一些示例中,均一性补偿系数包括亮度趋势一致区间的增益系数曲线的常数系数,可将显示的灰阶中位于亮度趋势一致区间的灰阶代入增益系数曲线,得到该灰阶对应的增益系数,利用增益系数对显示信号进行均一性补偿。
在步骤S203中,在显示的灰阶不包括位于亮度趋势一致区间的灰阶的情况下,读取存储的Demura补偿系数,并根据显示的灰阶和Demura补偿系数对显示信号进行补偿。
显示的灰阶不包括位于亮度趋势一致区间的灰阶,表示显示的灰阶的均一性补偿的补偿效果与Demura补偿的补偿效果会相互抵消,可只利用Demura补偿系数对显示信号进行补偿。再利用补偿后的显示信号进行图像显示。
利用Demura补偿系数对显示信号进行补偿,能够增大或减小显示信号的电压或电流,实现对显示信号的调整,从而改变显示信号驱动的子像素的亮度。同理,利用均一性补偿系数对显示信号进行补偿,能够增大或减小显示信号的电压或电流,实现对显示信号的调整,从而改变显示信号驱动的子像素的亮度。本申请实施例中Demura补偿系数对显示信号进行的补偿和均一性补偿系数对显示信号进行的补偿会叠加作用于亮度趋势一致区间。非亮度趋势一致区间会受Demura补偿系数对显示信号的补偿作用,并不受均一性补偿系数对显示信号的补偿作用。
上述均一性补偿系数和Demura补偿系数的具体内容可参见上述实施例中的相关说明,在此不再赘述。
在本申请实施例中,显示面板存储均一性补偿系数和Demura补偿系数,在根据显示信号确定的显示的灰阶包括位于亮度趋势一致区间的灰阶的情况下,对于显示信号与位于亮度趋势一致区间的灰阶对应的部分,利用Demura补偿系数和均一性补偿系数对其进行补偿,对于显示信号与不在亮度趋势一致区间的灰阶对应的部分,利用Demura补偿系数对其进行 补偿。在根据显示信号确定的显示的灰阶不包括位于亮度趋势一致区间的灰阶的情况下,对于显示的灰阶,利用Demura补偿系数对其进行补偿。只对显示信号与位于亮度趋势一致区间的灰阶对应的部分,利用均一性补偿系数进行补偿,能够避免均一性补偿的补偿效果与Demura补偿的补偿效果相互抵消,从而提高显示面板显示的均一性。
本申请第三方面提供一种显示补偿装置,该显示补偿装置可为上位机等装置,在此并不限定。图8示出了本申请一实施例提供的显示补偿装置。如图8所示,显示补偿装置300可包括一致性确定模块301、区间确定模块302、第一计算模块303、第二计算模块304和录入模块305。
一致性确定模块301可用于获取显示面板的全灰阶中两个以上目标灰阶的亮度参数,基于亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶。
在一些示例中,目标灰阶包括最大灰阶。
在一些示例中,目标灰阶包括Demura补偿过程中指定拍摄的灰阶中的最大灰阶。
区间确定模块302可用于根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间。
第一计算模块303可用于针对显示面板的全灰阶中的目标灰阶,利用Demura补偿算法,计算得到Demura补偿系数。
第二计算模块304可用于针对显示面板的位于亮度趋势一致区间的目标灰阶,利用均一性补偿算法,计算得到均一性补偿系数。
录入模块305可用于将Demura补偿系数和均一性补偿系数写入驱动集成电路,以使驱动集成电路根据显示的灰阶读取Demura补偿系数和均一性补偿系数进行补偿。
在本申请实施例中,可获取显示面板的多个目标灰阶的亮度参数,基于亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶。根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,可确定灰阶的亮度趋势一致区间。对显示面板的全灰阶中的目标灰阶利用Demura补偿算法,计算得到Demura补偿系数。对显示面板位于亮度趋势 一致区间的目标灰阶利用均一性补偿算法,计算得到均一性补偿系数。将Demura补偿系数和均一性补偿系数写入驱动集成电路,Demura补偿系数对显示面板显示的全灰阶起作用,即Demura补偿会对显示面板显示的全灰阶产生补偿作用;均一性补偿系数只对显示面板显示的位于亮度趋势一致区间的灰阶起作用,即均一性补偿只会对显示面板显示的位于亮度趋势一致区间的灰阶产生补偿作用,从而避免Demura补偿的补偿效果和均一性补偿的补偿效果相互抵消,提高显示面板的均一性。
在一些实施例中,目标灰阶包括最大灰阶。一致性确定模块301可用于:将显示面板的显示区域划分为N 1个子区域,N 1为大于或等于2的整数;基于N 1个子区域的亮度参数,确定N 1个子区域中每一子区域的不同目标灰阶的亮度表征值;获取每一子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的第一差距值;在第一差距值大于或等于第一一致阈值的子区域的数量满足第一预设条件的情况下,确定目标灰阶为亮度趋势不一致的目标灰阶;在第一差距值大于或等于第一一致阈值的子区域的数量不满足第一预设条件的情况下,确定目标灰阶为亮度趋势一致的目标灰阶。
在一些实施例中,目标灰阶包括最大灰阶。一致性确定模块301可用于:将显示面板的显示区域划分为N 2个子区域,N 2为大于或等于2的整数;基于N 2个子区域的亮度参数,确定N 2个子区域中每一子区域的不同目标灰阶的亮度表征值,以及每一子区域在同一目标灰阶的第一显示颜色的亮度表征值和第二显示颜色的亮度表征值,第一显示颜色为白色,第二显示颜色为红色、绿色、蓝色中的至少一种;获取每一子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的第二差距值,以及每一子区域在同一目标灰阶的第一显示颜色的亮度表征值与第二显示颜色的亮度表征值的第三差距值;在第二差距值超出第二一致阈值的子区域的数量满足第二预设条件,或,在第三差距值超出第三一致阈值的子区域的数量满足第三预设条件的情况下,确定目标灰阶为亮度趋势不一致的目标灰阶;在第二差距值超出第二一致阈值的子区域的数量不满足第二预设条件,且在第三差距值超出第三一致阈值的子区域的数量不满足第三预设条件的情况下, 确定目标灰阶为亮度趋势一致的目标灰阶。
在一些示例中,亮度表征值根据子区域的亮度参数和目标灰阶对应的参照亮度参数确定,参照亮度参数包括预先指定的亮度参数或任意一个子区域的亮度参数。
在一些实施例中,目标灰阶包括最大灰阶。区间确定模块302可用于:按照目标灰阶由大至小的顺序,在目标灰阶中查找第一目标灰阶,第一目标灰阶为第一个亮度趋势不一致的目标灰阶;根据第一目标灰阶,确定亮度趋势一致区间,亮度趋势一致区间的上限值为最大灰阶,亮度趋势一致区间的下限值为第一目标灰阶。
在一些实施例中,目标灰阶包括最大灰阶。区间确定模块302可用于:按照目标灰阶由大至小的顺序,在目标灰阶中查找第一类灰阶和第二类灰阶,其中,第一类灰阶包括与前一目标灰阶的亮度趋势不同且亮度趋势不一致的目标灰阶,第二类灰阶包括与前一目标灰阶的亮度趋势不同且亮度趋势一致的目标灰阶;按照由大至小的顺序,将最大灰阶到第一个第一类灰阶的区间,第二类灰阶到相邻的第一类灰阶的区间,和/或,最小的第二类灰阶到最小灰阶的区间确定为亮度趋势一致区间。
在一些实施例中,目标灰阶包括最大灰阶。区间确定模块302可用于:获取高亮灰阶区间;在高亮灰阶区间中,按照目标灰阶由大至小的顺序,在目标灰阶中查找第三类灰阶和第四类灰阶,第三类灰阶包括与前一目标灰阶的亮度趋势一致性不同且亮度趋势不一致的目标灰阶,第四类灰阶包括与前一目标灰阶的亮度趋势一致性不同且亮度趋势一致的目标灰阶;按照目标灰阶由大至小的顺序,将高亮灰阶区间中最大灰阶到第一个第三类灰阶的区间,第四类灰阶到相邻的第三类灰阶的区间,和/或,最小的第四类灰阶到最小灰阶的区间确定为亮度趋势一致区间。
在一些实施例中,第二计算模块304可用于:针对显示面板的位于亮度趋势一致区间的目标灰阶,利用均一性补偿算法,得到位于亮度趋势一致区间的目标灰阶对应的增益系数;利用位于亮度趋势一致区间的目标灰阶,以及位于亮度趋势一致区间的目标灰阶对应的增益系数,拟合计算得到亮度趋势一致区间的增益系数曲线的常数系数,并将常数系数确定为均 一性补偿系数。
在一些示例中,显示面板的显示区域包括多个子区域。对应地,位于亮度趋势一致区间的目标灰阶对应的增益系数包括位于亮度趋势一致区间的目标灰阶在各子区域对应的增益系数,亮度趋势一致区间的增益系数曲线的常数系数包括各子区域对应的常数系数。
在一些示例中,目标灰阶可包括:对显示面板进行均一性补偿指定选取的灰阶和对显示面板进行Demura补偿指定选取的灰阶;或者,对显示面板进行均一性补偿指定选取的部分灰阶和对显示面板进行Demura补偿指定选取的部分灰阶。
在一些示例中,目标灰阶包括Demura补偿过程中指定拍摄的灰阶中的最大灰阶。
本申请第四方面还提供了一种显示补偿设备。图9示出了本申请一实施例提供的显示补偿设备。如图9所示,显示补偿设备400包括存储器401、处理器402及存储在存储器401上并可在处理器402上运行的计算机程序。
在一个示例中,上述处理器402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401可包括只读存储器(Read-Only Memory,ROM),随机存取存储器(Random Access Memory,RAM),磁盘存储介质设备,光存储介质设备,闪存设备,电气、光学或其他物理/有形的存储器存储设备。因此,通常,存储器包括一个或多个编码有包括计算机可执行指令的软件的有形(非暂态)计算机可读存储介质(例如,存储器设备),并且当该软件被执行(例如,由一个或多个处理器)时,其可操作来执行参考根据本申请第一方面实施例中显示补偿方法所描述的操作。
处理器402通过读取存储器401中存储的可执行程序代码来运行与可执行程序代码对应的计算机程序,以用于实现上述第一方面实施例中的显示补偿方法。
在一个示例中,显示补偿设备400还可包括通信接口403和总线404。其中,如图9所示,存储器401、处理器402、通信接口403通过总线404连接并完成相互间的通信。
通信接口403,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。也可通过通信接口403接入输入设备和/或输出设备。
总线404包括硬件、软件或两者,将显示补偿设备400的部件彼此耦接在一起。举例来说而非限制,总线404可包括加速图形端口(Accelerated Graphics Port,AGP)或其他图形总线、增强工业标准架构(Enhanced Industry Standard Architecture,EISA)总线、前端总线(Front Side Bus,FSB)、超传输(HyperTransport,HT)互连、工业标准架构(Industry Standard Architecture,ISA)总线、无限带宽互连、低引脚数(Low pin count,LPC)总线、存储器总线、微信道架构(MicroChannel Architecture,MCA)总线、外围组件互连(Peripheral Component Interconnect,PCI)总线、PCI-Express(PCI-E)总线、串行高级技术附件(Serial Advanced Technology Attachment,SATA)总线、视频电子标准协会局部(Video Electronics Standards Association Local Bus,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404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。
本申请第五方面还提供一种显示装置。该显示装置包括驱动IC。该驱动IC存储有第一方面实施例中显示补偿方法得到的Demura补偿系数和均一性补偿系数,该驱动IC用于读取Demura补偿系数和均一性补偿系数,执行第二方面实施例中的显示补偿方法。显示装置具体可包括手机、计算机、平板电脑、电视、电子纸等具有显示功能的装置,在此并不限定。
本申请第六方面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指令,该计算机程序指令被处理器执行时可实现上述第一方面实施例中的显示补偿方法或第二方面实施例中的显示补偿方法,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非暂态计算机可读存储介质,如只读存储器 (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。
本申请实施例还可提供一种计算机程序产品,该计算机程序产品中的指令由电子设备的处理器执行时,使得电子设备执行上述第一方面实施例中的显示补偿方法或第二方面实施例中的显示补偿方法,且能达到相同的技术效果,为避免重复,这里不再赘述。
需要明确的是,本说明书中的各个实施例均采用递进的方式描述,各个实施例之间相同或相似的部分互相参见即可,每个实施例重点说明的都是与其他实施例的不同之处。对于装置实施例、设备实施例、显示面板实施例、显示装置实施例、计算机可读存储介质实施例、计算机程序产品实施例而言,相关之处可以参见方法实施例的说明部分。本申请并不局限于上文所描述并在图中示出的特定步骤和结构。本领域的技术人员可以在领会本申请的精神之后,做出各种改变、修改和添加,或者改变步骤之间的顺序。并且,为了简明起见,这里省略对已知方法技术的详细描述。
上面参考根据本申请的实施例的方法、装置(系统)和计算机程序产品的流程图和/或框图描述了本申请的各方面。应当理解,流程图和/或框图中的每个方框以及流程图和/或框图中各方框的组合可以由计算机程序指令实现。这些计算机程序指令可被提供给通用计算机、专用计算机、或其它可编程数据处理装置的处理器,以产生一种机器,使得经由计算机或其它可编程数据处理装置的处理器执行的这些指令使能对流程图和/或框图的一个或多个方框中指定的功能/动作的实现。这种处理器可以是但不限于是通用处理器、专用处理器、特殊应用处理器或者现场可编程逻辑电路。还可理解,框图和/或流程图中的每个方框以及框图和/或流程图中的方框的组合,也可以由执行指定的功能或动作的专用硬件来实现,或可由专用硬件和计算机指令的组合来实现。
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。在权利要求书中,术语“包括”并 不排除其他装置或步骤;数量词“一个”不排除多个;术语“第一”、“第二”用于标示名称而非用于表示任何特定的顺序。权利要求中的任何附图标记均不应被理解为对保护范围的限制。权利要求中出现的多个部分的功能可以由一个单独的硬件或软件模块来实现。某些技术特征出现在不同的从属权利要求中并不意味着不能将这些技术特征进行组合以取得有益效果。

Claims (20)

  1. 一种显示补偿方法,包括:
    获取显示面板的全灰阶中两个以上目标灰阶的亮度参数,基于所述亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶;
    根据所述亮度趋势一致的目标灰阶和所述亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间;
    针对所述显示面板的全灰阶中的目标灰阶,利用Demura补偿算法,计算得到Demura补偿系数;
    针对所述显示面板的位于所述亮度趋势一致区间的目标灰阶,利用均一性补偿算法,计算得到均一性补偿系数;
    将所述Demura补偿系数和所述均一性补偿系数写入驱动集成电路,所述驱动集成电路根据显示的灰阶读取所述Demura补偿系数和所述均一性补偿系数进行补偿。
  2. 根据权利要求1所述的方法,其中,所述目标灰阶包括最大灰阶,
    所述基于所述亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,包括:
    将所述显示面板的显示区域划分为N 1个子区域,N 1为大于或等于2的整数;
    基于所述N 1个子区域的亮度参数,确定所述N 1个子区域中每一子区域的不同目标灰阶的亮度表征值;
    获取每一子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的第一差距值;
    在所述第一差距值大于或等于第一一致阈值的子区域的数量满足第一预设条件的情况下,确定目标灰阶为亮度趋势不一致的目标灰阶;
    在所述第一差距值大于或等于所述第一一致阈值的子区域的数量不满足所述第一预设条件的情况下,确定目标灰阶为亮度趋势一致的目标灰阶。
  3. 根据权利要求1所述的方法,其中,所述目标灰阶包括最大灰阶,
    所述基于所述亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,包括:
    将所述显示面板的显示区域划分为N 2个子区域,N 2为大于或等于2的整数;
    基于所述N 2个子区域的亮度参数,确定所述N 2个子区域中每一子区域的不同目标灰阶的亮度表征值,以及每一子区域在同一目标灰阶的第一显示颜色的亮度表征值和第二显示颜色的亮度表征值,所述第一显示颜色为白色,所述第二显示颜色为红色、绿色、蓝色中的至少一种;
    获取每一子区域的目标灰阶的亮度表征值与最大灰阶的亮度表征值的第二差距值,以及每一子区域在同一目标灰阶的所述第一显示颜色的亮度表征值与所述第二显示颜色的亮度表征值的第三差距值;
    在所述第二差距值超出第二一致阈值的子区域的数量满足第二预设条件,或,在所述第三差距值超出第三一致阈值的子区域的数量满足第三预设条件的情况下,确定目标灰阶为亮度趋势不一致的目标灰阶;
    在所述第二差距值超出所述第二一致阈值的子区域的数量不满足所述第二预设条件,且在所述第三差距值超出所述第三一致阈值的子区域的数量不满足所述第三预设条件的情况下,确定目标灰阶为亮度趋势一致的目标灰阶。
  4. 根据权利要求2或3所述的方法,其中,所述亮度表征值根据子区域的亮度参数和目标灰阶对应的参照亮度参数确定。
  5. 根据权利要求4所述的方法,其中,所述参照亮度参数包括预先指定的亮度参数或任意一个子区域的亮度参数。
  6. 根据权利要求1所述的方法,其中,所述目标灰阶包括最大灰阶,
    所述根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间,包括:
    按照目标灰阶由大至小的顺序,在目标灰阶中查找第一目标灰阶,所 述第一目标灰阶为第一个亮度趋势不一致的目标灰阶;
    根据所述第一目标灰阶,确定所述亮度趋势一致区间,所述亮度趋势一致区间的上限值为最大灰阶,所述亮度趋势一致区间的下限值为所述第一目标灰阶。
  7. 根据权利要求6所述的方法,还包括:
    在目标灰阶不包括所述第一目标灰阶的情况下,获取新的值更小的目标灰阶;
    判定新获取的目标灰阶的亮度趋势是否一致,直至获取到所述第一目标灰阶。
  8. 根据权利要求6所述的方法,所述按照目标灰阶由大至小的顺序,在目标灰阶中查找第一目标灰阶,包括:
    在全灰阶中选取多个候选灰阶,将所述候选灰阶作为目标灰阶;
    按照目标灰阶由大至小的顺序,依次判定所述候选灰阶的亮度趋势是否一致,直至获取到所述第一目标灰阶。
  9. 根据权利要求1所述的方法,其中,所述目标灰阶包括最大灰阶,
    所述根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间,包括:
    按照目标灰阶由大至小的顺序,在目标灰阶中查找第一类灰阶和第二类灰阶,其中,所述第一类灰阶包括亮度趋势不一致且与前一目标灰阶的所述亮度趋势不同的目标灰阶,所述第二类灰阶包括亮度趋势一致且与前一目标灰阶的所述亮度趋势不同的目标灰阶;
    按照目标灰阶由大至小的顺序,将最大灰阶到第一个所述第一类灰阶的区间,所述第二类灰阶到相邻的所述第一类灰阶的区间,和/或,最小的所述第二类灰阶到最小灰阶的区间确定为所述亮度趋势一致区间。
  10. 根据权利要求1所述的方法,其中,所述目标灰阶包括最大灰阶,
    所述根据亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间,包括:
    获取高亮灰阶区间;
    在所述高亮灰阶区间中,按照目标灰阶由大至小的顺序,在目标灰阶中查找第三类灰阶和第四类灰阶,所述第三类灰阶包括亮度趋势不一致且与前一目标灰阶的所述亮度趋势一致性不同的目标灰阶,所述第四类灰阶包括亮度趋势一致且与前一目标灰阶的所述亮度趋势一致性不同的目标灰阶;
    按照目标灰阶由大至小的顺序,将所述高亮灰阶区间中最大灰阶到第一个所述第三类灰阶的区间,所述第四类灰阶到相邻的所述第三类灰阶的区间,和/或,最小的第四类灰阶到最小灰阶的区间确定为所述亮度趋势一致区间。
  11. 根据权利要求10所述的方法,其中,
    所述最小灰阶包括全灰阶中的灰阶最小值或所述高亮灰阶区间中的灰阶最小值。
  12. 根据权利要求1所述的方法,其中,所述针对显示面板的位于所述亮度趋势一致区间的目标灰阶,利用均一性补偿算法,计算得到均一性补偿系数,包括:
    针对所述显示面板的位于所述亮度趋势一致区间的目标灰阶,利用均一性补偿算法,得到位于所述亮度趋势一致区间的目标灰阶对应的增益系数;
    利用位于所述亮度趋势一致区间的目标灰阶,以及位于所述亮度趋势一致区间的目标灰阶对应的增益系数,拟合计算得到所述亮度趋势一致区间的增益系数曲线的常数系数,并将所述常数系数确定为所述均一性补偿系数。
  13. 根据权利要求12所述的方法,其中,显示面板的显示区域包括多个子区域,位于所述亮度趋势一致区间的目标灰阶对应的增益系数包括位于所述亮度趋势一致区间的目标灰阶在各子区域对应的增益系数,所述亮度趋势一致区间的增益系数曲线的常数系数包括各子区域对应的常数系数。
  14. 根据权利要求1所述的方法,其中,所述目标灰阶包括:
    对所述显示面板进行均一性补偿指定选取的灰阶和对显示面板进行Demura补偿指定选取的灰阶;
    或者,
    对所述显示面板进行均一性补偿指定选取的部分灰阶和对显示面板进行Demura补偿指定选取的部分灰阶。
  15. 根据权利要求14所述的方法,其中,所述目标灰阶包括Demura补偿过程中指定拍摄的灰阶中的最大灰阶。
  16. 一种显示补偿方法,应用于显示装置中的驱动集成电路,所述驱动集成电路存储有如权利要求1至15中任意一项显示补偿方法得到的Demura补偿系数和均一性补偿系数,所述方法包括:
    根据显示信号,确定显示的灰阶;
    在显示的灰阶包括位于亮度趋势一致区间的灰阶的情况下,读取存储的所述Demura补偿系数和所述均一性补偿系数,并根据显示的灰阶、所述Demura补偿系数和所述均一性补偿系数对显示信号进行补偿;
    在显示的灰阶不包括位于所述亮度趋势一致区间的灰阶的情况下,读取存储的所述Demura补偿系数,并根据显示的灰阶和所述Demura补偿系数对显示信号进行补偿。
  17. 一种显示补偿装置,包括:
    一致性确定模块,用于获取显示面板的全灰阶中两个以上目标灰阶的亮度参数,基于所述亮度参数,确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶;
    区间确定模块,用于根据确定亮度趋势一致的目标灰阶和亮度趋势不一致的目标灰阶,确定全灰阶的亮度趋势一致区间;
    第一计算模块,用于针对显示面板的全灰阶中的目标灰阶,利用Demura补偿算法,计算得到Demura补偿系数;
    第二计算模块,用于针对显示面板的位于所述亮度趋势一致区间的目标灰阶,利用均一性补偿算法,计算得到均一性补偿系数;
    录入模块,用于将所述Demura补偿系数和所述均一性补偿系数写入驱动集成电路,以使所述驱动集成电路根据显示的灰阶读取所述Demura 补偿系数和所述均一性补偿系数进行补偿。
  18. 一种显示补偿设备,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权利要求1至15中任意一项所述的显示补偿方法。
  19. 一种显示装置,包括:
    驱动集成电路,所述驱动集成电路存储有如权利要求1至15中任意一项所述的显示补偿方法得到的Demura补偿系数和均一性补偿系数,所述驱动集成电路用于读取所述Demura补偿系数和所述均一性补偿系数,执行如权利要求16所述的显示补偿方法。
  20. 一种计算机可读存储介质,所述计算机可读存储介质上存储有计算机程序指令,所述计算机程序指令被处理器执行时实现如权利要求1至16任意一项所述的显示补偿方法。
PCT/CN2022/122281 2022-06-28 2022-09-28 显示补偿方法、装置、设备、介质及显示装置 WO2024000887A1 (zh)

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