CN110264950B - Brightness adjusting method and display device - Google Patents
Brightness adjusting method and display device Download PDFInfo
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- CN110264950B CN110264950B CN201910573745.XA CN201910573745A CN110264950B CN 110264950 B CN110264950 B CN 110264950B CN 201910573745 A CN201910573745 A CN 201910573745A CN 110264950 B CN110264950 B CN 110264950B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The invention relates to a brightness adjusting method and a display device. The brightness adjusting method can adjust the gray scale of each color of the sub-pixels with the same gray scale value in the display area, so that the brightness of the sub-pixels with the same original gray scale value is more uniform, and the OLED display adopting the brightness adjusting method can emit light more uniformly.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a brightness adjustment method and a display device.
Background
In recent years, Organic Light-Emitting Diode (OLED) displays have gradually replaced Cathode Ray Tube (CRT) displays, becoming mainstream products in the display market.
In the conventional technology, the light emitted from the OLED display panel is usually electroluminescence generated by the sub-pixels disposed therein.
The applicant found in the course of implementing the conventional technique that: the traditional OLED display screen has uneven light emitting display.
Disclosure of Invention
Therefore, it is necessary to provide a brightness adjusting method and a display device for solving the problem of uneven light emitting display of the OLED display panel in the conventional technology.
A luminance adjustment method for adjusting luminance of an original image of a display area having a plurality of sub-pixels, the display area including a first area and a second area surrounding the first area, comprising:
acquiring original gray scale values of all first color sub-pixels in the display area, and dividing the original gray scale values of all the first color sub-pixels into at least one gray scale interval; for each of the gray scale intervals:
selecting an original gray scale value from the gray scale interval as a mark gray scale value, and judging that the gray scale value is a uniform brightness value of all first color sub-pixels of the mark gray scale value in the display area;
if the brightness uniformity value is lower than a preset value, aiming at each original gray-scale value in the gray-scale interval:
and acquiring first average brightness of all first color sub-pixels with the gray scale value in the first area as the original gray scale value, and adjusting the gray scale value of all first color sub-pixels with the gray scale value in the second area as the original gray scale value by taking the first average brightness as a reference so as to adjust the brightness of all first color sub-pixels in the second area.
The brightness adjusting method can adjust the gray scale of each color of the sub-pixels with the same gray scale value in the display area, so that the brightness of the sub-pixels with the same original gray scale value is more uniform, and the OLED display adopting the brightness adjusting method can emit light more uniformly.
Drawings
Fig. 1 is a schematic view of a sub-pixel arrangement structure of a display area according to an embodiment of the present application.
Fig. 2 is a schematic diagram illustrating region division of a display region according to an embodiment of the present application.
Fig. 3 is a flowchart illustrating a brightness adjusting method according to an embodiment of the present application.
Fig. 4 is a schematic diagram illustrating region division of a display region in another embodiment of the present application.
Fig. 5 is a flowchart illustrating a brightness adjusting method according to another embodiment of the present application.
Fig. 6 is a flowchart illustrating a brightness adjusting method according to another embodiment of the present application.
Fig. 7 is a detailed flowchart illustrating step S300 of the brightness adjusting method according to an embodiment of the present application.
Fig. 8 is a detailed flowchart illustrating the step S300' of the brightness adjusting method according to an embodiment of the present application.
Fig. 9 is a schematic diagram illustrating a step of obtaining a luminance uniformity value according to an embodiment of the present application.
Fig. 10 is a schematic diagram illustrating region division of a display region according to another embodiment of the present application.
Fig. 11 is a schematic diagram illustrating region division of a display region according to another embodiment of the present application.
Wherein, the meanings represented by the reference numerals of the figures are respectively as follows:
10. a display area;
110. a pixel unit;
112. a sub-pixel;
12. a first region;
14. a second region;
140. displaying a sub-region;
142. a third region;
144. and a fourth region.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1, in general, the display region 10 of the OLED display panel generally has a plurality of pixel units 110, and each pixel unit 110 is composed of an R (red) sub-pixel, a G (green) sub-pixel, and a B (blue) sub-pixel. Therefore, the display region 10 has a plurality of sub-pixels 112, and the plurality of sub-pixels 112 includes a plurality of red sub-pixels, a plurality of green sub-pixels, and a plurality of blue sub-pixels. The plurality of sub-pixels 112 in the display area 10 emit light simultaneously to constitute an image.
When an image is constructed, the gray scale values of different sub-pixels 112 are different, and the luminance of the sub-pixels 112 corresponding to different gray scale values is also different. Generally, the luminance of the same color sub-pixels 112 with the same gray scale value should be the same, and when the luminance of the same color sub-pixels 112 with the same gray scale value is different, the problem of display unevenness is caused. The embodiment of the application provides a brightness adjusting method aiming at the problem of uneven display of an OLED display screen.
In the embodiments of the present application, the image of the display region 10 before the gradation adjustment is referred to as an original image, and the image of the display region 10 after the gradation adjustment is referred to as an adjusted image. The gray level value of the sub-pixel 112 corresponding to the original image is referred to as the original gray level value.
In the brightness adjustment method of the present application, gray scale adjustment needs to be performed separately for each color of the sub-pixels 112, and brightness adjustment is achieved through gray scale adjustment. The present application takes the method for adjusting the brightness of the first color sub-pixel as an example. The first color sub-pixel may be any one of a red sub-pixel, a blue sub-pixel, and a green sub-pixel.
In the embodiment of the present application, as shown in fig. 2, the display area 10 is divided into a first area 12 and a second area 14. The second region 14 surrounds the first region 12. In other words, the display area 10 is divided into a first area 12 and a second area 14, the first area 12 being a central area of the display area 10; the second region 14 is a region of the display region 10 other than the central region. The first region 12 and the second region 14 together constitute the display region 10.
In general, for a rectangular display area, the division of the first area 12 and the second area 14 may be to divide the display area 10 into 9 small areas with equal area on average, and the 9 small areas with equal area are arranged in 3 rows and 3 columns. In this case, the smallest area at the center may be the first area 12, and the other areas may be the second areas 14. For a circular or oval display area, a small area concentric with the display area 10, having the same shape and an area that is one ninth of the display area can also be found as the second area 14. And will not be described in detail.
As shown in fig. 3, the brightness adjusting method includes the steps of:
s100, acquiring original gray-scale values of all first color sub-pixels in the display area, and dividing the original gray-scale values of all the first color sub-pixels into at least one gray-scale interval.
Gray scale adjustment is performed for the first color sub-pixels in the display area 10, thereby realizing brightness adjustment. The first color sub-pixel may be any one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel. When each sub-pixel 112 in the display area 10 emits light to form an original image, the original gray-scale values of all the first color sub-pixels are obtained. And after the original gray-scale values of all the first color sub-pixels are obtained, all the original gray-scale values are subjected to interval division, so that the original gray-scale values are divided into at least one gray-scale interval.
For example, in a conventional display panel, the gray scale value of the sub-pixel 112 is generally in the range of 0 to 255 gray scales, i.e., [0, 255] when the display panel emits light. The interval division here is to divide the [0, 255] gray scale into at least one interval, for example, the [0, 255] gray scale may be divided into two gray scale intervals of [0, 128] and [129, 255 ].
It should be noted that in this embodiment, in step S100, after the original image is formed in the display area 10, the original gray scale values of all the first color sub-pixels in the display area 10 corresponding to the original image are obtained, and the original gray scale values corresponding to the original image are regularly divided into at least one section. In other words, in step S100 in this embodiment, the real-time original gray scale value of the first color sub-pixel may be divided according to a certain rule, so as to obtain the divided gray scale interval. For example, when the real-time original gray level value of the original image for the first color sub-pixel is [32, 192], the [32, 192] gray level is divided into four gray level intervals of [32, 72], [73, 112], [113, 152] and [153, 192 ].
In other embodiments, the [0, 255] gray scale may be divided into fixed gray scale sections, and after the original image is formed in the display area 10, the original gray scale values of all the first color sub-pixels may be corresponded to the fixed gray scale sections to obtain the divided gray scale sections. For example, the [0, 255] gray level may be first divided into three gray level intervals: [0, 96], [97, 192] and [193, 255 ]. After the original image is formed in the display area 10, assuming that the real-time original gray scale value of the first color sub-pixel is [32, 192], the [32, 192] gray scale is corresponding to the gray scale interval of [0, 96], [97, 192] and [193, 255], and two gray scale intervals of [32, 96] and [97, 192] are obtained.
The original gray scale value can be divided into a plurality of equally divided gray scale intervals, and also can be divided in an unequal manner. Generally, as the gray scale increases and the brightness increases, the display unevenness of the gray scale member is small, so that the gray scale interval can be larger than that of the lower gray scale at the higher gray scale, thereby performing more precise compensation.
S200, selecting an original gray-scale value from the gray-scale interval as a mark gray-scale value, and judging that the gray-scale value is the uniform brightness value of all the first color sub-pixels of the mark gray-scale value in the display area.
In step S100, after the gray scale sections are divided, each gray scale section includes at least one original gray scale value. And selecting an original gray scale value from the gray scale intervals as a mark gray scale value aiming at each gray scale interval. For example, after the original gray scale value is divided into three gray scale intervals of [0, 96], [97, 192] and [193, 255], 0 gray scale can be selected from the [0, 96] gray scale interval as a mark gray scale value; selecting 150 gray levels from the [97, 192] gray level interval as mark gray level values; and 255 gray levels are selected from the [193, 255] gray level interval as mark gray level values.
And selecting a mark gray scale value for each gray scale interval, and then judging that the gray scale value is the uniform brightness value of all the first color sub-pixels of the mark gray scale value in the display area 10. For example, for the [97, 192] gray level interval, the original gray level value with the gray level value of 150 can be selected as the mark gray level value. Then, the brightness uniformity of all the first color sub-pixels with the gray scale value of 150 in the display area 10 is determined.
S300, if the brightness uniformity value is lower than a preset value, aiming at each original gray scale value in the gray scale interval: and acquiring first average brightness of all first color sub-pixels with the gray scale values in the first area as the original gray scale values, and adjusting the gray scale values of all first color sub-pixels with the gray scale values in the second area as the original gray scale values to compensate brightness by taking the first average brightness as a reference.
Specifically, in step S200, a mark gray-scale value and a uniform brightness value of all the first color sub-pixels corresponding to the mark gray-scale value are obtained for each gray-scale interval. In the embodiment of the present application, the adjustment manner of each original gray level value of all the first color sub-pixels in the display area 10 within the gray level interval is determined by calculating the uniform brightness value of the first color sub-pixels corresponding to the mark gray level value. Namely: and judging that the gray-scale value is the uniform brightness value of all the first color sub-pixels of the marked gray-scale value, and if the uniform brightness value is lower than a preset value, adjusting the original gray-scale values of all the first color sub-pixels in the gray-scale interval by adopting a first adjustment mode.
The first adjustment mode specifically comprises: and acquiring a first average brightness of all the first color sub-pixels with the gray scale value in the first area 12 as the original gray scale value, and adjusting the gray scale value in the second area 14 as the gray scale value of all the first color sub-pixels with the gray scale value in the original gray scale value by taking the first average brightness as a reference. That is, for the gray scale interval where the mark gray scale value is located, when the brightness uniformity value is lower than the preset value, the display area 10 is divided as shown in fig. 2. After the division, taking an original gray-scale value of the gray-scale interval as an example, the average luminance of all the first color sub-pixels in the first region 12 is obtained, where the gray-scale value is the original gray-scale value, and the average luminance is named as a first average luminance. Then, the gray-scale values in the second area 14 are adjusted to be the gray-scale values of all the first color sub-pixels of the original gray-scale value based on the first average brightness.
For example, in step S200, for the [97, 192] gray level interval, the original gray level value with the gray level value of 150 is selected as the mark gray level value. When the brightness uniformity value of all the first color sub-pixels with the gray scale value of 150 is lower than the preset value:
for all the first color sub-pixels with the original gray-scale value of 97, the adjustment mode is as follows: the luminances of all the first color sub-pixels in the first area 12 with the original gray scale value of 97 are obtained, and the luminances are averaged to obtain a first average luminance. And performing gray scale adjustment on the first color sub-pixel with the original gray scale value of 97 in the second area 14 by taking the first average brightness as a reference, so as to perform brightness compensation on the first color sub-pixel with the original gray scale value of 97 in the second area 14.
Similarly, for all the first color sub-pixels with the original gray-scale value of 98, the adjustment mode is: the luminance of all the first color sub-pixels with the original gray scale value of 98 in the first region 12 is obtained, and the first average luminance is obtained by averaging the luminance of the first color sub-pixels. And performing gray scale adjustment on the first color sub-pixel with the original gray scale value of 98 in the second area 14 by taking the first average brightness as a reference, so as to perform brightness compensation on the first color sub-pixel with the original gray scale value of 98 in the second area 14.
The adjustment is performed for all the first color sub-pixels corresponding to the original gray scale values in the [97, 192] gray scale interval.
According to the brightness adjusting method, when the brightness uniformity value of the first color sub-pixel corresponding to the mark gray-scale value is lower than the preset value, it is indicated that the brightness uniformity of the first color sub-pixel corresponding to the mark gray-scale value is poor in the display area. The brightness uniformity of the mark gray level determines the gray level adjustment mode of each original gray level value in the gray level interval. At this time, the gray scale and the brightness of the first color sub-pixel in the second region are adjusted by taking the first average brightness in the first region as a reference, so that the brightness of the same color sub-pixel with the same original gray scale value in the display region can be closer, and the brightness uniformity of the whole display region is increased. In other words, for the single-color sub-pixels with the same original gray scale value, when the brightness uniformity is poor, the whole display area is used as the adjustment area, so that the brightness of the sub-pixels with the same original gray scale value in the whole display area is closer to that of the same-color sub-pixels, and the brightness uniformity of the display area is increased.
In another embodiment, the brightness adjustment method further comprises a second adjustment mode. In this embodiment, as shown in fig. 4, the display area 10 is divided into a plurality of display sub-areas 140. Wherein each display sub-area 140 comprises a third area 142 and a fourth area 144, and the fourth area 144 surrounds the third area 142. In other words, after the display area 10 is divided into the display sub-areas 140, each of the display sub-areas 140 is further divided into a third area 142 and a fourth area 144, where the third area 142 is a central area of the display sub-area 140; the fourth area 144 is the other area of the display sub-area 140 except the central area. The third area 142 and the fourth area 144 together constitute the display sub-area 140. In general, the division of the third area 142 and the fourth area 144 with respect to the display sub-area 140 in which they are located may be the same as the division of the first area 12 and the second area 14 with respect to the display area 10. And will not be described in detail.
At this time, as shown in fig. 5, the brightness adjustment method further includes:
s300', if the brightness uniformity value is not lower than a preset value, aiming at each original gray scale value in the gray scale interval: and for each display sub-region, acquiring second average brightness of all first color sub-pixels with the gray-scale value in the third region being the original gray-scale value, and adjusting the gray-scale value of all first color sub-pixels with the gray-scale value in the fourth region being the original gray-scale value by taking the second average brightness as a reference so as to compensate brightness.
Specifically, in step S200, a mark gray-scale value and a uniform brightness value of all the first color sub-pixels corresponding to the mark gray-scale value are obtained for each gray-scale interval. In the embodiment of the present application, the adjustment manner of each original gray level value of all the first color sub-pixels in the display area 10 within the gray level interval is determined by calculating the uniform brightness value of the first color sub-pixels corresponding to the mark gray level value. Namely: and judging that the gray-scale value is the uniform brightness value of all the first color sub-pixels of the marked gray-scale value, and if the uniform brightness value is not lower than a preset value, adjusting the original gray-scale values of all the first color sub-pixels in the gray-scale interval by adopting a second adjustment mode.
The second adjustment mode specifically includes: for each of the display sub-regions 140, the second average luminance of all the first color sub-pixels with the gray-scale value in the third region 142 being the original gray-scale value is obtained, and the gray-scale value in the fourth region 144 is adjusted to be the gray-scale value of all the first color sub-pixels with the gray-scale value in the original gray-scale value based on the second average luminance. That is, for the gray scale section where the mark gray scale value is located, when the brightness uniformity value is not lower than the preset value, the display area 10 is divided as shown in fig. 4. After the division, taking an original gray-scale value of the gray-scale interval as an example, the average luminance of all the first color sub-pixels in which the gray-scale value in the third area 142 is the original gray-scale value is obtained, and the average luminance is named as the second average luminance. Then, the gray-scale values in the fourth area 144 are adjusted to be the gray-scale values of all the first color sub-pixels of the original gray-scale value based on the second average luminance.
For example, in step S200, for the [97, 192] gray level interval, the original gray level value with the gray level value of 150 is selected as the mark gray level value. When the brightness uniformity value of all the first color sub-pixels with the gray scale value of 150 is not lower than the preset value:
for all the first color sub-pixels with the original gray-scale value of 97, the adjustment mode is as follows: for one display sub-region 140 of all the display sub-regions 140, the luminances of all the first color sub-pixels in the third region 142 whose original gray-scale values are 97 are obtained, and the luminances are averaged to obtain a second average luminance. And performing gray scale adjustment on the first color sub-pixel with the original gray scale value of 97 in the fourth area 144 based on the second average brightness, so as to perform brightness compensation on the first color sub-pixel with the original gray scale value of 97 in the fourth area 144.
Similarly, for the other display sub-regions 140, the luminance of the first color sub-pixel having the original gray-scale value of 97 is adjusted in this adjustment manner.
Similarly, for all the first color sub-pixels with the original gray-scale value of 98, the adjustment mode is: for one display sub-area 140 of all the display sub-areas 140, the luminances of all the first color sub-pixels with the original gray-scale value of 98 in the third area 142 are obtained, and the luminances are averaged to obtain a second average luminance. And performing gray scale adjustment on the first color sub-pixel with the original gray scale value of 98 in the fourth area 144 based on the second average brightness, so as to perform brightness compensation on the first color sub-pixel with the original gray scale value of 98 in the fourth area 144.
Similarly, for the other display sub-regions 140, the gray scale adjustment is performed on the first color sub-pixel with the original gray scale value of 98 according to the adjustment method, so as to perform the brightness adjustment.
The adjustment is performed for all the first color sub-pixels corresponding to the original gray scale values in the [97, 192] gray scale interval.
It should be understood that the essence of the adjustment manner of the above step S300' is: when the brightness uniformity is not lower than the predetermined value, the display area 10 is divided into a plurality of display sub-areas 140, and the individual gray scale adjustment is performed for each display sub-area 140. Therefore, the division method of dividing the display area 10 into the plurality of display sub-areas 140 is not limited to the one shown in fig. 4. For example, in other embodiments, the display area 10 may be divided into 16 display sub-areas 140, and the gray scale adjustment described in step S300' may be performed on each display sub-area 140. The brightness adjustment method for performing the individual gray scale adjustment on each display sub-region 140 by dividing the display region 10 into the plurality of display sub-regions 140 is understood to be within the protection scope of the present embodiment.
According to the brightness adjusting method, when the brightness uniformity value of the first color sub-pixel corresponding to the mark gray-scale value is not lower than the preset value, it is indicated that the brightness uniformity of the first color sub-pixel corresponding to the mark gray-scale value is better in the display area. The brightness uniformity of the mark gray level determines the gray level adjustment mode of each original gray level value in the gray level interval. At this time, the display area is divided into a plurality of display sub-areas. Each display sub-region includes a third region and a fourth region surrounding the third region. And adjusting the gray scale and the brightness of the first color sub-pixel in the fourth area by taking the second average brightness in the third area as a reference, so that the brightness of the same color sub-pixel with the same original gray scale value in each display sub-area is closer to each other, and the brightness uniformity of each display sub-area is improved. In other words, for the single-color sub-pixels with the same original gray scale value, when the brightness uniformity is better, each display sub-region is used as the adjustment region, so that the brightness of the sub-pixels with the same original gray scale value in each display sub-region is closer to that of the same-color sub-pixels. Therefore, the brightness uniformity of each display subarea can be finely adjusted, and the brightness uniformity of the display areas is further improved.
The brightness adjusting method selects different gray scale adjusting modes from two different conditions, thereby achieving the purpose of brightness compensation. In two different cases, for the single-color sub-pixels with the same original gray scale value, if the display uniformity of the display area is poor, the whole display area is taken as the adjusting area to perform gray scale adjustment, so that the display uniformity of the display area is improved. If the display uniformity of the display area is better, the gray scale adjustment is carried out by taking a single display sub-area as an adjusting area, so that the display uniformity of the display area is improved in detail.
In one embodiment, as shown in fig. 6, after the step S100, the method further includes:
s410, aiming at each first color sub-pixel, acquiring actual light-emitting brightness corresponding to the original gray-scale value of the first color sub-pixel.
Specifically, when each sub-pixel 112 in the display area 10 emits light to form an original image, after obtaining the original gray-scale values of all the sub-pixels of the first color, the method further includes: and acquiring the actual light emitting brightness corresponding to each first color sub-pixel under the original gray scale value. That is, when each sub-pixel 112 in the display area 10 emits light to form an original image, the original gray-scale value of each sub-pixel of the first color is obtained, and the actual light-emitting brightness of the sub-pixel 112 is correspondingly obtained.
S420, obtaining an actual gamma curve of the first color sub-pixel according to the original gray scale value and the actual light emitting brightness of the first color sub-pixel.
The gamma curve is the corresponding curve of the gray level value and the brightness. For each sub-pixel 112, after obtaining the original gray scale value and the actual luminance corresponding to the original gray scale value, the actual gamma curve of the sub-pixel 112 can be obtained according to the original gray scale value and the actual luminance.
Further, when the brightness adjusting method includes the above steps S410 and S420, that is, the brightness adjusting method generates an actual gamma curve according to each first color sub-pixel, as shown in fig. 7:
in the step S300, if the uniform brightness value is lower than the preset value, for each original gray-scale value in the gray-scale interval: the obtaining the first average brightness of all the first color sub-pixels in which the gray scale value in the first region 12 is the original gray scale value specifically includes:
s310, judging the magnitude relation between the brightness uniformity value in the step S200 and a preset value, and when the brightness uniformity value is lower than the preset value, executing the following steps for each original gray-scale value in the gray-scale interval:
s320, dividing the display area into a first area and a second area, wherein the dividing manner may be as shown in fig. 2.
S330, acquiring first average brightness of all first color sub-pixels with the gray scale value in the first area as the original gray scale value.
Specifically, after the display area 10 is divided into the first area 12 and the second area 14, the average luminance of all the first color sub-pixels in the first area 12 is obtained, wherein the gray-scale value is the original gray-scale value. For example, for the first color sub-pixel with the original gray scale value of 97 gray scales in the [97, 192] gray scale interval, the step is: the sum of the light-emitting luminances of all the first color sub-pixels with the gray-scale value of 97 in the first region 12 is obtained, and then the sum of the light-emitting luminances of all the first color sub-pixels with the gray-scale value of 97 is divided by the number of all the first color sub-pixels with the gray-scale value of 97 in the first region 12, so as to obtain the average luminance of all the first color sub-pixels with the gray-scale value of 97 in the first region 12. The average brightness of all the first color sub-pixels with the gray scale value in the first area 12 being the original gray scale value is named as the first average brightness.
The step S300 of adjusting the gray-scale values of all the first color sub-pixels in the second region 14 to be the original gray-scale values based on the first average luminance specifically includes:
s340, acquiring an actual gamma curve of each first color sub-pixel in the second area.
Specifically, the actual gamma curve of each first color sub-pixel can be obtained according to the above steps S410 and S420. According to the brightness adjusting method, gray scale adjustment needs to be carried out on each first color sub-pixel according to the actual gamma curve of the first color sub-pixel. Therefore, when adjusting the original gray-scale value of each first color sub-pixel, the actual gamma curve of the first color sub-pixel is first obtained. For example, in step S320, after the first average brightness of all the first color sub-pixels with the gray scale value of 97 in the first area 12 is obtained, the gray scale of the first color sub-pixels with the gray scale value of 97 in the second area 14 can be adjusted according to the first average brightness. Regarding a first color sub-pixel with an original gray-scale value of 97 in the second region 14, we shall name the first color sub-pixel with the original gray-scale value of 97 in the second region 14 as the first color sub-pixel, and the actual gamma curve of the first color sub-pixel should be obtained first during the adjustment process.
S350, finding a first target gray-scale value corresponding to the first average brightness on the actual gamma curve.
In particular, it has been mentioned above that the actual gamma curve for each first color sub-pixel is different. When the first color sub-pixel is adjusted, the actual gamma curve of the first color sub-pixel is obtained, and the first average brightness is found on the actual gamma curve of the first color sub-pixel. At this time, the first average brightness is the target brightness of the first color sub-pixel. The gray level value of the first average luminance corresponding to the actual gamma curve is the target gray level value of the first sub-pixel 112. Corresponding to the first average luminance, we name the target gray scale value as the first target gray scale value.
S360, adjusting the original gray-scale value of the first color sub-pixel to a first target gray-scale value.
And adjusting the original gray-scale value of the first color sub-pixel to make the adjusted gray-scale value of the first color sub-pixel be the first target gray-scale value.
The gray scale adjustment process in steps S320 to S350 is described by taking only one first color sub-pixel in the second region 14 as an example. In fact, each first color sub-pixel in the second region 14 should be subjected to the above adjustment process.
In still another embodiment, when the brightness adjusting method includes the above-mentioned steps S410 and S420, that is, the brightness adjusting method generates an actual gamma curve according to each first color sub-pixel, as shown in fig. 8,
in the step S300', if the uniform brightness value is not lower than the preset value, for each original gray scale value in the gray scale interval: for each display sub-region 140, the obtaining the second average luminance of all the first color sub-pixels in the third region 142 whose gray-scale values are the original gray-scale values specifically includes:
s310', judging the size relation between the brightness uniformity value and a preset value in the step S200, and when the brightness uniformity value is not lower than the preset value, executing the following steps for each original gray-scale value in the gray-scale interval:
s320', dividing a display area into a plurality of display sub-areas, and dividing each of the display sub-areas into a third area and a fourth area. The division may be as shown in fig. 4.
S330', acquiring second average brightness of all first color sub-pixels with the gray-scale value in the third area being the original gray-scale value.
Specifically, the display area 10 is divided into a plurality of display sub-areas 140, and each display sub-area 140 is divided into a third area 142 and a fourth area 144, and then the average light-emitting luminance of all the first-color sub-pixels in the third area 142 is obtained, where the gray-scale value is the original gray-scale value. For example, for a first color sub-pixel with an original gray level value of 97 gray levels in the [97, 192] gray level interval, the following steps are taken as an example: the sum of the emission luminances of all the first color sub-pixels with the gray scale value of 97 in the third region 142 is obtained, and then the average luminance of all the first color sub-pixels with the gray scale value of 97 in the third region 142 can be obtained by dividing the sum of the emission luminances of all the first color sub-pixels with the gray scale value of 97 by the number of the first color sub-pixels with the gray scale value of 97 in the third region 142. The average luminance of all the first color sub-pixels with the gray scale value in the third area 142 being the original gray scale value is named as the second average luminance.
The step S300' of adjusting the gray-scale values in the fourth area 144 to be the gray-scale values of all the first color sub-pixels of the original gray-scale value based on the second average luminance specifically includes:
s340', for each of the fourth regions, obtaining an actual gamma curve of each of the first color sub-pixels in the fourth region.
Specifically, for each fourth region 144, the actual gamma curve of each first color sub-pixel in the fourth region 144 can be obtained according to the above steps S410 and S420. According to the brightness adjusting method, gray scale adjustment needs to be carried out on each first color sub-pixel according to the actual gamma curve of the first color sub-pixel. Therefore, when adjusting the original gray-scale value of each first color sub-pixel, the actual gamma curve of the first color sub-pixel is first obtained. For example, in step S320', after the second average luminance of all the first color sub-pixels with the gray scale value of 97 in the third region 142 is obtained, the gray scale of the first color sub-pixels with the gray scale value of 97 in the fourth region 144 can be adjusted according to the second average luminance. Regarding a first color sub-pixel with an original gray-scale value of 97 in the fourth region 144, we will name the first color sub-pixel with the original gray-scale value of 97 in the fourth region 144 as a second first color sub-pixel, and during the adjustment process, the actual gamma curve of the second first color sub-pixel should be obtained first.
S350', finding a second target gray-scale value corresponding to the second average luminance on the actual gamma curve.
In particular, it has been mentioned above that the actual gamma curve for each first color sub-pixel is different. When the second first color sub-pixel is adjusted, the actual gamma curve of the second first color sub-pixel is obtained, and the second average brightness is found on the actual gamma curve of the second first color sub-pixel. At this time, the second average luminance is the target luminance of the second first color sub-pixel. The gray-scale value corresponding to the actual gamma curve of the second average luminance is the target gray-scale value of the second sub-pixel 112. Corresponding to the second average luminance, we name the target gray scale value as the second target gray scale value.
And S360', adjusting the original gray-scale value of the first color sub-pixel to a second target gray-scale value.
And adjusting the original gray-scale value of the second first color sub-pixel to make the adjusted gray-scale value of the second first color sub-pixel be a second target gray-scale value.
The gray scale adjustment process of the foregoing steps S320 'to S350' is described by taking only one first color sub-pixel in one fourth region 144 as an example. In fact, each first color sub-pixel in each fourth area 144 should be subjected to the above adjustment process.
In one embodiment, as shown in fig. 9, the step S200 includes:
s210, selecting an original gray level value from the gray level interval as a mark gray level value.
Specifically, in step S100, after the gray scale sections are divided, each gray scale section includes at least one original gray scale value. And selecting an original gray scale value from the gray scale intervals as a mark gray scale value aiming at each gray scale interval. For example, after the original gray scale value is divided into three gray scale intervals of [0, 96], [97, 192] and [193, 255], 0 gray scale can be selected from the [0, 96] gray scale interval as a mark gray scale value; selecting 150 gray levels from the [97, 192] gray level interval as mark gray level values; and 255 gray levels are selected from the [193, 255] gray level interval as mark gray level values.
S220, dividing the display area into a plurality of display sub-areas.
Specifically, the display area 10 is divided into a plurality of display sub-areas 140, so as to determine the uniform brightness value of all the first color sub-pixels in the display area 10 whose gray-scale value is the mark gray-scale value. The plurality of display sub-regions 140 may or may not be equal in size. The display area 10 is divided into a plurality of display sub-areas 140, which may be as shown in fig. 10, that is, the display area 10 is divided into 9 display sub-areas 140; the division may also be as shown in fig. 11, that is, the display area 10 is divided into 16 display sub-areas 140. And are not limited herein.
It should be noted that, in order to reduce the amount of calculation of the brightness adjustment method, in general, the dividing method of the "plurality of display sub-regions 140" in the step S220 is the same as the dividing method of the "display sub-regions 140" in the step S300', that is, the display sub-regions 140 in the two steps are the same. In other embodiments, the division method of the display sub-area 140 in two different steps may be different.
And S230, acquiring the average light-emitting brightness of all the first color sub-pixels with the gray-scale value as the mark gray-scale value in each display sub-region.
After the display area 10 is divided into a plurality of display sub-areas 140, the average luminance of all the first color sub-pixels in each display sub-area 140, whose gray-scale value is the mark gray-scale value, is obtained. For example, for the [97, 192] gray level interval, the original gray level value with the gray level value of 150 can be selected as the mark gray level value. Assuming that the display area 10 is divided into 9 display sub-areas 140 of equal size in step S220, the sum of the light-emitting luminances of all the first color sub-pixels with a gray-scale value of 150 is obtained in each display sub-area 140. And then dividing the sum of the luminance of all the first color sub-pixels with the gray scale value of 150 by the number of all the first color sub-pixels with the gray scale value of 150 in the display sub-region 140 to obtain the average luminance of all the first color sub-pixels with the gray scale value of 150 in the display sub-region 140. By this method, the average luminance of all the first color sub-pixels in the 9 display sub-regions 140 with the gray scale value of 150 is calculated and obtained, and 9 average luminance is obtained.
S240, acquiring the lowest value and the highest value of the average light-emitting brightness in all the display sub-regions, wherein the brightness uniformity value is the ratio of the lowest value and the highest value of the average light-emitting brightness.
Specifically, after the average luminance of all the display sub-regions 140 is obtained, the lowest value and the highest value of the average luminance are found, and the luminance uniformity value can be obtained by dividing the lowest value by the highest value. Continuing with the example in step S230, after obtaining the average light-emitting luminance of each of the 9 display sub-regions 140, dividing the lowest value of the 9 average light-emitting luminances by the highest value to obtain the uniform luminance value of the display region 10. Of course, the uniform brightness value herein also refers to the uniform brightness value of all the first color sub-pixels for the mark gray-scale values in one gray-scale interval.
The low gray scale generally refers to a 0-32 gray scale interval, and because the display unevenness difference between the gray scales in the low gray scale interval is large, for the original gray scale value of which the original gray scale value is in the range of 0 to 32 low gray scale, a first adjusting mode or a second adjusting mode can be selected, namely, the gray scale value in a second area is adjusted to be the gray scale value of all the first color sub-pixels of the original gray scale value by taking the first average brightness as a reference; or adjusting the gray-scale values of all the first color sub-pixels with the gray-scale values in the fourth area as the original gray-scale values by taking the second average brightness as a reference.
In one embodiment, the preset value is 80%. That is, for the marked gray-scale value in the gray-scale interval, when the uniform brightness value of all the first color sub-pixels corresponding to the marked gray-scale value is lower than 80%, the adjustment method described in the above step S300 is adopted to adjust each original gray-scale value in the gray-scale interval. When the brightness uniformity of all the first color sub-pixels corresponding to the mark gray level is not less than 80%, adjusting each original gray level in the gray level interval by the adjustment method described in the step S300'.
The brightness adjustment method of the present application is explained below with reference to a specific embodiment in which the first color sub-pixel has a gray scale value ranging from 0 to 255 when the display area 10 emits light. The brightness adjusting method comprises the following steps:
and acquiring original gray-scale values of all the first color sub-pixels in the display area 10 and actual light-emitting brightness corresponding to the original gray-scale values, and acquiring an actual gamma curve of each first color sub-pixel according to the original gray-scale value and the actual light-emitting brightness of each first color sub-pixel. The original gray scale values range from 0 to 255, i.e., [0, 255 ].
The original gray scale values are divided into seven gray scale intervals of 0 to 31, 32 to 63, 64 to 95, 96 to 127, 128 to 191, 192 to 223, and 224 to 255. Namely, the original gray level value is divided into seven gray level intervals of [0, 31], [32,63], [64, 95], [96, 127], [128, 191], [192, 223] and [224, 255 ].
For the [32,63] gray scale interval, the original gray scale value with the gray scale value of 32 is selected as the mark gray scale value. At this time, the display area 10 is divided into 9 display sub-areas 140. For each display sub-region 140, the average light-emitting brightness of all the first color sub-pixels with original gray-scale value of 32 in the display sub-region 140 is obtained. Assuming that the lowest value and the highest value of the average luminance of the 9 display sub-regions 140 are a and b, the luminance uniformity of all the first color sub-pixels with the gray-scale value of 32 is a/b. Assuming that the luminance uniformity value a/b < the preset value of 80%, the display area 10 is divided into a first area 12 and a second area 14. At this time, for the sub-pixel 112 with the original gray-scale value of 32, the average light-emitting luminance of all the sub-pixels 112 with the original gray-scale value of 32 in the first region 12 is obtained. Within the second region 14, for each sub-pixel 112 with an original gray-scale value of 32: finding out the gray-scale value corresponding to the average brightness on the actual gamma curve of the sub-pixel 112, and adjusting the original gray-scale value of the sub-pixel 112 by using the gray-scale value as the target gray-scale value. The first color sub-pixels with gray scale values of 33 and 34. cndot. are also adjusted by the method.
For the [64, 95] gray scale interval, the original gray scale value with the gray scale value of 64 is selected as the mark gray scale value. At this time, the display area 10 is divided into 9 display sub-areas 140. For each display sub-region 140, the average light-emitting brightness of all the first color sub-pixels with the original gray-scale value of 64 in the display sub-region 140 is obtained. Assuming that the lowest value of the average luminance of the 9 display sub-regions 140 is c and the highest value is d, the luminance uniformity of all the first color sub-pixels with the gray scale value of 64 is c/d. Assuming that the luminance uniformity value c/d > preset value is 80%, the display area 10 is divided into a plurality of display sub-areas 140, and each of the display sub-areas 140 is divided into a third area 142 and a fourth area 144. At this time, for each display sub-region 140, the average light emission luminance of all the sub-pixels 112 with the original gray-scale value of 64 in the third region 142 is obtained for the sub-pixels 112 with the original gray-scale value of 64. Within the fourth region 144, for each sub-pixel 112 with an original gray-scale value of 64: finding out the gray-scale value corresponding to the average brightness on the actual gamma curve of the sub-pixel 112, and adjusting the original gray-scale value of the sub-pixel 112 by using the gray-scale value as the target gray-scale value. The other display sub-regions 140 are also adapted according to this scheme. The first color sub-pixels with gray scale values of 65, 66, 95 are also adjusted according to the method.
It should be noted that for the [0, 31] gray level interval, since the gray level is relatively low, one symbolic gray level may be selected, for example, the 0 gray level is the symbolic gray level, and the display area 10 is divided into 9 display sub-areas 140. For each display sub-region 140, the average luminance of all the first color sub-pixels with the original gray-scale value of 0 in the display sub-region 140 is obtained, and the luminance adjusting method is selected according to the luminance uniformity value of all the first color sub-pixels with the gray-scale value of 0. Or the user can select the first gray scale adjustment mode or the second gray scale adjustment mode according to the requirement to perform gray scale adjustment on the first color sub-pixel corresponding to the [0, 31] gray scale interval.
Wherein, the first adjustment mode is: the display area 10 is divided into a first area 12 and a second area 14, and for each original gray scale value in the [0, 31] gray scale interval, the average light emitting brightness of the first color sub-pixel corresponding to the original gray scale value to be adjusted in the first area 12 is obtained. In the second area 14, the target gray-scale value corresponding to the average luminance on the actual gamma curve of the first color sub-pixel corresponding to the original gray-scale value to be adjusted is found, so that the gray-scale values of all the first color sub-pixels with the gray-scale value in the second area 14 being the original gray-scale value are adjusted by taking the first average luminance as a reference. For the first color sub-pixel with the gray scale value in the second area 14 being the original gray scale value, the adjusted gray scale value should be the target gray scale value.
The second adjustment method is as follows: the display area 10 is divided into a plurality of display sub-areas 140, and each display sub-area 140 is divided into a third area 142 and a fourth area 144. At this point, individual adjustments are made for each display sub-region 140. For each original gray scale value in the [0, 31] gray scale interval, the average light-emitting brightness of the first color sub-pixel corresponding to the original gray scale value to be adjusted in the third region 142 is obtained. In the fourth region 144, the target gray-scale value corresponding to the average luminance on the actual gamma curve of the first color sub-pixel corresponding to the original gray-scale value to be adjusted is found, so that the gray-scale values of all the first color sub-pixels with the gray-scale value in the fourth region 144 as the original gray-scale value are adjusted based on the second average luminance. For the first color sub-pixel in the fourth area 144 with the original gray scale value, the adjusted gray scale value should be the target gray scale value.
In the above brightness adjusting method, the original gray scale value is divided into seven gray scale intervals, and it should be understood that the division of the gray scale intervals is not limited to the above embodiment in the practical application. The gray scale interval may be divided in an equal division manner or in a non-equal division manner, for example, when the sub-pixel corresponding to the original gray scale value in a certain gray scale range needs to be finely adjusted, the original gray scale value in the gray scale range may be divided into several more gray scale intervals. For example, in the above embodiment, if the tester finds that the [32,63] gray scale interval has poor brightness compensation effect, the [32,63] gray scale interval can be divided into [32,42], [43,53], and [54,63] gray scale intervals, so as to perform fine adjustment.
The present application also provides a display device comprising a display area 10 made up of a plurality of sub-pixels 112. The display area 10 comprises a first area 12 and a second area 14 surrounding the first area 12. The plurality of sub-pixels 112 includes a plurality of first color sub-pixels, a plurality of green sub-pixels, and a plurality of blue sub-pixels.
The display device further comprises a gray scale dividing module, a first calculating module, a judging module, a second calculating module and an adjusting module.
Specifically, the gray scale dividing module is configured to obtain original gray scale values of all first color sub-pixels in the display area 10, and divide the original gray scale values of all first color sub-pixels into at least one gray scale interval;
the first calculating module is configured to select an original gray scale value from each gray scale interval as a mark gray scale value, and calculate a gray scale value in the display area 10, where the gray scale value is a uniform brightness value of all first color sub-pixels of the mark gray scale value;
the judging module is used for judging the size relation between the uniform brightness value and a preset value;
the second calculating module is configured to, when the brightness uniformity value is lower than a preset value, obtain, for each original gray-scale value in the gray-scale interval, a first average brightness of all first color sub-pixels whose gray-scale values in the first area 12 are the original gray-scale values;
the adjusting module is configured to adjust the gray scale values in the second area 14 to be the gray scale values of all the first color sub-pixels of the original gray scale value, with the first average luminance as a reference.
Every combination of the technical features of the above-mentioned embodiments can be performed, and for the sake of brevity, all possible combinations of the technical features of the above-mentioned embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the technical features should be considered as the scope of the present description.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A luminance adjustment method for adjusting luminance of an original image of a display area having a plurality of sub-pixels, the display area including a first area and a second area surrounding the first area, comprising:
acquiring original gray scale values of all first color sub-pixels in the display area, and dividing the original gray scale values of all the first color sub-pixels into at least one gray scale interval; for each of the gray scale intervals:
selecting an original gray scale value from the gray scale interval as a mark gray scale value, and judging that the gray scale value is a uniform brightness value of all first color sub-pixels of the mark gray scale value in the display area;
if the brightness uniformity value is lower than a preset value, aiming at each original gray-scale value in the gray-scale interval:
acquiring first average brightness of all first color sub-pixels with the gray scale values in the first area as the original gray scale values, and adjusting the gray scale values of all first color sub-pixels with the gray scale values in the second area as the original gray scale values to compensate brightness by taking the first average brightness as a reference;
wherein, the selecting an original gray scale value from the gray scale interval as a mark gray scale value, and determining that the gray scale value is a uniform brightness value of all the first color sub-pixels of the mark gray scale value in the display area includes:
selecting an original gray scale value from the gray scale interval as a gray scale value;
dividing the display area into a plurality of display sub-areas;
acquiring all first average light-emitting brightness of which the gray-scale value is the mark gray-scale value in each display sub-area;
and acquiring the lowest value and the highest value of the average light-emitting brightness in all the display sub-regions, wherein the brightness uniformity value is the ratio of the lowest value and the highest value of the average light-emitting brightness.
2. The method for adjusting brightness according to claim 1, wherein after obtaining the original gray-scale values of all the first color sub-pixels in the display area, the method further comprises:
acquiring actual light emitting brightness corresponding to the original gray-scale value of each first color sub-pixel;
and obtaining an actual gamma curve of the first color sub-pixel according to the original gray-scale value and the actual light-emitting brightness of the first color sub-pixel.
3. The method of claim 1, wherein the adjusting the gray-scale values of all the first color sub-pixels in the second area to the original gray-scale values based on the first average luminance comprises:
acquiring an actual gamma curve of each first color sub-pixel in the second region;
finding a first target gray-scale value corresponding to the first average brightness on the actual gamma curve;
and adjusting the original gray-scale value of the first color sub-pixel to a first target gray-scale value.
4. A luminance adjustment method according to claim 1, wherein the display sub-area includes a third area and a fourth area surrounding the third area; after judging that the gray-scale value in the display area is the uniform brightness value of all the first color sub-pixels of the mark gray-scale value, the method further comprises the following steps:
if the brightness uniformity value is not lower than a preset value, aiming at each original gray scale value in the gray scale interval:
and for each display sub-region, acquiring second average brightness of all first color sub-pixels with the gray-scale value in the third region being the original gray-scale value, and adjusting the gray-scale value of all first color sub-pixels with the gray-scale value in the fourth region being the original gray-scale value by taking the second average brightness as a reference so as to compensate brightness.
5. The method of claim 4, wherein the adjusting the gray-scale values of all the first color sub-pixels in the fourth area to the original gray-scale values based on the second average luminance comprises:
for each fourth region, acquiring an actual gamma curve of each first color sub-pixel in the fourth region;
finding a second target gray-scale value corresponding to the second average brightness on the actual gamma curve;
and adjusting the original gray-scale value of the first color sub-pixel to a second target gray-scale value.
6. The method of claim 4, wherein the obtaining original gray-scale values of all first color sub-pixels in the display area and dividing the original gray-scale values of all first color sub-pixels into at least one gray-scale interval comprises:
acquiring original gray-scale values of all first color sub-pixels in the display area;
and dividing the original gray scale value into a plurality of equally divided gray scale intervals.
7. The luminance adjustment method according to claim 4,
for the original gray-scale value with the original gray-scale value in the range of 0 to 32 low gray-scale, taking the first average brightness as a reference, and adjusting the gray-scale value in the second area to be the gray-scale value of all the first color sub-pixels of the original gray-scale value; or
And adjusting the gray-scale value in the fourth area to be the gray-scale value of all the first color sub-pixels of the original gray-scale value by taking the second average brightness as a reference.
8. The method of claim 1, wherein the dividing the original gray-scale values of all the first color sub-pixels into at least one gray-scale interval comprises:
and on the basis of a preset rule, performing interval division on the real-time original gray scale value of the first color sub-pixel to obtain a divided gray scale interval.
9. The luminance adjustment method as claimed in claim 1, wherein the preset value is 80%.
10. A display device including a display region formed of a plurality of sub-pixels, the display region including a first region and a second region surrounding the first region, the plurality of sub-pixels including a plurality of first-color sub-pixels, the display device comprising:
the gray scale division module is used for acquiring original gray scale values of all first color sub-pixels in the display area and dividing the original gray scale values of all the first color sub-pixels into at least one gray scale interval;
the first calculation module is used for selecting an original gray-scale value from each gray-scale interval as a mark gray-scale value and calculating the brightness uniformity value of all first color sub-pixels of the mark gray-scale value in the display area;
the judging module is used for judging the size relation between the uniform brightness value and a preset value;
the second calculation module is used for acquiring first average brightness of all first color sub-pixels of which the gray-scale values in the first area are the original gray-scale values aiming at each original gray-scale value in the gray-scale interval when the brightness uniformity value is lower than a preset value;
the adjusting module is used for adjusting the gray-scale values of all the first color sub-pixels of which the gray-scale values in the second area are the original gray-scale values by taking the first average brightness as a reference so as to adjust the brightness of all the first color sub-pixels in the second area;
the first calculation module is further configured to select an original gray scale value from the gray scale interval as a gray scale value;
dividing the display area into a plurality of display sub-areas;
acquiring all first average light-emitting brightness of which the gray-scale value is the mark gray-scale value in each display sub-area;
and acquiring the lowest value and the highest value of the average light-emitting brightness in all the display sub-regions, wherein the brightness uniformity value is the ratio of the lowest value and the highest value of the average light-emitting brightness.
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| CN111816113A (en) * | 2020-07-29 | 2020-10-23 | 昆山工研院新型平板显示技术中心有限公司 | Brightness compensation method, device and equipment of display panel |
| CN111933082B (en) * | 2020-09-03 | 2022-11-29 | 京东方科技集团股份有限公司 | Method for improving low gray scale image quality and display device |
| CN112185296B (en) * | 2020-10-16 | 2022-01-04 | Tcl华星光电技术有限公司 | Display panel brightness adjusting method and device |
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