CN117496884A - Brightness adjusting method of display device and display device - Google Patents

Brightness adjusting method of display device and display device Download PDF

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Publication number
CN117496884A
CN117496884A CN202311625672.7A CN202311625672A CN117496884A CN 117496884 A CN117496884 A CN 117496884A CN 202311625672 A CN202311625672 A CN 202311625672A CN 117496884 A CN117496884 A CN 117496884A
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Prior art keywords
brightness
compensation
display device
value
pixel group
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Inventor
陈辛洪
王玉莹
徐赵鹏
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TCL Huaxing Photoelectric Technology Co Ltd
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TCL Huaxing Photoelectric Technology Co Ltd
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Priority to CN202311625672.7A priority Critical patent/CN117496884A/en
Publication of CN117496884A publication Critical patent/CN117496884A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

The application discloses a brightness adjusting method of a display device and the display device. The brightness adjustment method of the display device comprises the following steps: dividing a display area of a target display device into a plurality of compensation blocks, each compensation block comprising a plurality of pixel groups; acquiring brightness compensation data of each pixel group in each compensation block; when the first difference value of the maximum value and the minimum value of the brightness compensation data of the pixel groups in each compensation block is smaller than or equal to a first threshold value, obtaining the second difference value of the brightness compensation data and the minimum value of each pixel group; and compensating the brightness of each pixel group according to the minimum value and the second difference value. According to the method and the device, the first difference value is smaller than or equal to the first threshold value, the first difference value is the difference between the maximum value and the minimum value, and the second difference value is the difference between the brightness compensation data and the minimum value, so that the second difference value is smaller than or equal to the first threshold value, the occupation of the second difference value is reduced, the compensation data volume can be reduced on the premise of not losing the compensation information, and the cost of the display device is reduced.

Description

Brightness adjusting method of display device and display device
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a brightness adjustment method of a display device and a display device.
Background
Due to the influence of manufacturing process errors, the liquid crystal display device has a phenomenon of uneven display, namely a Mura phenomenon known in the industry, and the display effect is affected by the uneven display. Stain compensation (Demura) techniques are typically employed to eliminate display non-uniformity.
The Demura technique aims to improve display uniformity by brightness compensation of bright or dark spot areas. In order to make the compensation as accurate as possible, it is necessary to calculate a compensation value for each pixel of the display device, and the amount of compensation data is very large. Meanwhile, as the resolution of the display device is higher and higher, the compensation data volume is further increased, and the increase of the compensation data volume puts higher demands on the hardware function of the display device, and increases the cost of the display device.
Therefore, there is a need to solve the above-mentioned technical problems.
Disclosure of Invention
The application provides a brightness adjusting method of a display device and the display device, so that the compensation data volume is reduced on the premise of not losing compensation information, and the cost of the display device is reduced.
In order to solve the technical problems, the technical scheme provided by the application is as follows:
the application provides a brightness adjustment method of a display device, wherein the display device comprises a display area, and the brightness adjustment method of the display device comprises the following steps:
Dividing a display area of a target display device into a plurality of compensation blocks, wherein each compensation block comprises a plurality of pixel groups, and each pixel group comprises at least two pixels;
acquiring brightness compensation data of each pixel group in each compensation block;
when a first difference value of a maximum value and a minimum value of the brightness compensation data of the pixel groups in each compensation block is smaller than or equal to a first threshold value, obtaining a second difference value of the brightness compensation data of each pixel group in the compensation block and the minimum value;
and compensating the brightness of each pixel group according to the minimum value and the second difference value.
In the brightness adjustment method of the present application, the step of dividing the display area of the target display device into a plurality of compensation blocks, each of the compensation blocks including a plurality of pixel groups, each of the pixel groups including at least two pixels includes:
acquiring the resolution of the target display device, and obtaining the number of horizontal pixels and the number of vertical pixels of the target display device according to the resolution;
the display area of the target display device is divided into a plurality of compensation blocks according to the number of horizontal pixels and the number of vertical pixels, and any one of the compensation blocks includes the same number of the pixel groups.
In the brightness adjustment method of the present application, the step of obtaining brightness compensation data of each pixel group in each compensation block includes:
acquiring the brightness of each pixel group of the target display device under a gray-scale picture;
setting the brightness of the pixel group with preset coordinates as target brightness, and obtaining the difference value between the brightness of other pixel groups and the target brightness;
and acquiring brightness compensation data of each pixel group under the corresponding gray-scale picture according to the difference value.
In the brightness adjustment method of the present application, the step of obtaining the brightness of each pixel group of the target display device under a gray-scale screen includes:
and respectively acquiring the brightness of each pixel group of the target display device under a first gray-scale picture, a second gray-scale picture and a third gray-scale picture, wherein the gray-scale value corresponding to the first gray-scale picture is smaller than the gray-scale value corresponding to the second gray-scale picture, and the gray-scale value corresponding to the second gray-scale picture is smaller than the gray-scale value corresponding to the third gray-scale picture.
In the brightness adjustment method of the present application, the step of obtaining the brightness compensation data of each pixel group in each compensation block further includes:
When the first difference value between the maximum value and the minimum value of the brightness compensation data of the pixel groups in each compensation block is larger than a first threshold value, acquiring a third difference value between the number of pixels in each compensation block and the number of pixels in each pixel group;
when the third difference value is greater than 0, increasing the number of the compensation blocks in the target display device, and continuing to perform the step of acquiring the brightness compensation data of each pixel group in each compensation block until the first difference value is less than or equal to the first threshold value;
and when the third difference value is smaller than or equal to 0, the first threshold value is increased, and the step of acquiring the brightness compensation data of each pixel group in each compensation block is continued until the first difference value is smaller than or equal to the first threshold value.
In the luminance adjustment method of the present application, the step of increasing the number of the compensation blocks in the target display device includes:
and increasing the number of the compensation blocks in the target display device according to a preset multiple, wherein the preset multiple is a positive integer multiple.
In the brightness adjustment method of the present application, the step of increasing the first threshold value includes:
Adding the preset initial value to obtain an added preset initial value;
determining the first threshold after the increase based on the preset initial value after the increase, wherein the first threshold and the preset initial value meet a preset relation, and the preset relation is k=2 n -1, wherein n is a positive integer, n is the preset initial value, K is the first threshold value.
In the brightness adjustment method of the present application, the step of compensating the brightness of each pixel group according to the minimum value and the second difference value includes:
acquiring the minimum value of brightness compensation data of the compensation block, and acquiring a second difference value of each pixel group in the corresponding compensation block;
acquiring brightness compensation data of each pixel group in each compensation block according to the minimum value and the corresponding second difference value;
and compensating the brightness of each corresponding pixel group according to the brightness compensation data.
The application also provides a display device, the display device includes the display area, and the display device includes:
a first dividing module, configured to divide a display area of a target display device into a plurality of compensation blocks, each of the compensation blocks including a plurality of pixel groups, each of the pixel groups including at least two pixels;
The brightness acquisition module is used for acquiring brightness compensation data of each pixel group in each compensation block;
a first calculation module, configured to obtain a second difference value between the luminance compensation data of each pixel group in the compensation block and the minimum value when a first difference value between the maximum value and the minimum value of the luminance compensation data of each pixel group in the compensation block is less than or equal to a first threshold value;
and the compensation module is used for compensating the brightness of each pixel group according to the minimum value and the second difference value.
In the display device of the present application, the display device further includes a second computing module, the second computing module including:
an obtaining unit, configured to obtain a third difference value between the number of pixels in each compensation block and the number of pixels in each pixel group when a first difference value between a maximum value and a minimum value of brightness compensation data of the pixel group in each compensation block is greater than a first threshold value;
a first operation unit configured to increase the number of the compensation blocks in the target display device when the third difference value is greater than 0, and continue the step of acquiring the brightness compensation data of each pixel group in each compensation block until the first difference value is less than or equal to the first threshold value;
And the second operation unit is used for increasing the first threshold value when the third difference value is smaller than or equal to 0, and continuing to execute the step of acquiring the brightness compensation data of each pixel group in each compensation block until the first difference value is smaller than or equal to the first threshold value.
The beneficial effects are that: the application discloses a brightness adjusting method of a display device and the display device. The display device includes a display area, and the brightness adjustment method of the display device includes: dividing a display area of a target display device into a plurality of compensation blocks, wherein each compensation block comprises a plurality of pixel groups, and each pixel group comprises at least two pixels; acquiring brightness compensation data of each pixel group in each compensation block; when a first difference value of a maximum value and a minimum value of the brightness compensation data of the pixel groups in each compensation block is smaller than or equal to a first threshold value, obtaining a second difference value of the brightness compensation data of each pixel group in the compensation block and the minimum value; and compensating the brightness of each pixel group according to the minimum value and the second difference value. The first difference value of each pixel group in the compensation block is smaller than or equal to the first threshold value, the first difference value is the difference between the maximum value and the minimum value, the second difference value is the difference between the brightness compensation data and the minimum value, and the second difference value is smaller than or equal to the first difference value, so that the second difference value is also smaller than or equal to the first threshold value. By dividing the brightness compensation data into the minimum value and the second difference value, the occupation of the second difference value is reduced because the second difference value is smaller than or equal to the first threshold value, so that the compensation data amount can be reduced on the premise of not losing the compensation information, and the cost of the display device can be reduced.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a schematic diagram illustrating the principle of brightness adjustment;
fig. 2 is a flowchart of a brightness adjustment method of a display device according to an embodiment of the present application;
FIG. 3 is a diagram illustrating a division of the compensation data amount according to an embodiment of the present application;
fig. 4 is a division manner of a compensation block according to an embodiment of the present application;
FIG. 5 is a graph showing the correspondence between the resolution of the device and the compensation data amount;
FIG. 6 is a graph showing the correspondence between the number of gray-scale frames and the amount of compensation data;
FIG. 7 is a schematic diagram showing a method for performing brightness compensation on a display device using a gray-scale compensation table;
FIG. 8 is a flowchart of a brightness adjustment method according to an embodiment of the present application;
FIG. 9 is a comparison of compensation data amounts under brightness adjustment methods of display devices of different resolutions;
FIG. 10 is a comparison of compensation data amounts under the brightness adjustment method of different gray-scale frames;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 12 is a schematic structural diagram of a second computing module according to an embodiment of the present application.
Reference numerals illustrate:
the display device 1, the first division module 10, the luminance acquisition module 20, the first calculation module 30, the compensation module 40, the second calculation module 50, the acquisition unit 51, the first calculation unit 52, the second calculation unit 53.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application. In this application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
As shown in fig. 1, the display device 1 has a phenomenon of uneven display, and under the same gray-scale picture, the brightness at the a position is higher than other areas, and the brightness at the B position is lower than other areas, and the surface is a dark block, so that the brightness at the a position and the B position are inconsistent with the brightness of other areas of the display device 1, and the display effect of the display device 1 is affected. By adopting the brightness adjustment technology, brightness compensation can be performed on the position A and the position B, so that the brightness of the position A is reduced, the brightness of the position B is improved, the brightness of the position A and the brightness of the position B can be close to the brightness of other areas, and the display effect of the display device 1 is improved.
Since the brightness at a and B needs to be compensated, the brightness compensation at a and B needs to be calculated and brightness compensation data stored. In order to improve the accuracy of the brightness compensation, the amount of compensation data of the brightness compensation may be very large, which puts higher demands on the hardware function of the display device 1, and increases the cost of the display device 1.
As shown in fig. 2, the present application provides a brightness adjustment method of a display device 1, the display device including a display area, the brightness adjustment method of the display device including:
s10, dividing a display area of the target display device 1 into a plurality of compensation blocks, wherein each compensation block comprises a plurality of pixel groups, and each pixel group comprises at least two pixels;
s20, acquiring brightness compensation data of each pixel group in each compensation block;
s30, when the first difference value of the maximum value and the minimum value of the brightness compensation data of the pixel groups in each compensation block is smaller than or equal to a first threshold value, obtaining the second difference value of the brightness compensation data and the minimum value of the pixel groups in each compensation block;
and S40, compensating the brightness of each pixel group according to the minimum value and the second difference value.
In the present embodiment, the target display device 1 may be an LCD display device, an OLED display device, a Mini-LED display device, a Micro-LED display device, or the like.
In the present embodiment, the target display device 1 is provided with a display area provided with a plurality of pixels, the display area being for displaying a screen.
In step S10, the display area of the target display device 1 is divided into a plurality of compensation blocks, each of which contains the same number of pixels. For example, the target display apparatus 1 may include 16×9 compensation blocks, or the target display apparatus 1 may include 32×18 compensation blocks. The number of the division compensation blocks may be appropriately selected according to the resolution of the target display device 1, which is not limited in this application.
The compensation block may include a plurality of pixel groups, each pixel group including the same number of pixels, and one pixel group including at least two pixels. For example, one pixel group may include 4*4 pixels, or one pixel group may include 8×8 pixels, or one pixel group may include 8×16 pixels, but is not limited thereto, and the number of pixels included in each pixel group may be set according to the resolution of the display apparatus 1.
It should be understood that one pixel group includes 4*4 pixels, meaning that one pixel group includes 16 pixels in total, and 16 pixels are adjacent 4 rows of pixels, each row of pixels being 4 columns, i.e., one pixel group includes a 4-row 4-column pixel array. The case where the pixel group includes other numbers of pixels is similar, and will not be described in detail herein.
That is, as shown in fig. 3, the compensation data of the target display device 1 is divided into two parts, one part corresponding to the compensation block and the other part corresponding to the pixel group in the present application. The compensation block is used for compensating the brightness of the area, and the pixel group is used for compensating the stain.
In step S20, each compensation block includes a plurality of pixel groups, each pixel group includes a plurality of pixels, and each pixel group is correspondingly provided with a luminance compensation data.
In view of the compression requirement of the compensation data amount, one luminance compensation data is not stored for each pixel, but one luminance compensation data is stored for one pixel group. For example, the brightness compensation data of one pixel may be obtained in each pixel group, and the brightness compensation data of other pixels in the same pixel group is calculated by using the brightness compensation data of adjacent pixels. For example, the brightness compensation data of other pixels may be calculated by interpolation using the brightness compensation data of adjacent pixels, but is not limited thereto.
It should be appreciated that to achieve interpolation, the amount of data stored needs to be increased by 1 over the total number of pixel groups.
The present embodiment can reduce the amount of compensation data and reduce the cost of the display device 1 by storing only the luminance compensation data of one pixel in each pixel group.
In step S30, the maximum value of the luminance compensation data of the pixel groups in each compensation block refers to the maximum value of the luminance compensation data of the pixel groups of one compensation block. The minimum value of the luminance compensation data of the pixel groups in each compensation block refers to the minimum value of the luminance compensation data of the pixel groups of one compensation block.
That is, one compensation block corresponds to have a maximum value and a minimum value, the number of which is the same as the number of compensation blocks.
The first difference value refers to the difference between the maximum value and the minimum value of the same compensation block, and the same number of the first difference values is the same as the number of the compensation blocks.
The second difference value refers to a difference between the brightness compensation data of each pixel group in the same compensation block and the minimum value, and the number of the second difference values is the same as the number of the pixel groups in one compensation block, that is, one pixel group has one second difference value.
In step S40, the compensation for the brightness of each pixel group according to the minimum value and the second difference value means that each pixel group has a minimum value and the same number of second difference values as the pixel groups, and brightness compensation data of a plurality of pixel groups can be calculated according to the minimum value and the second difference values. Since only one minimum value and a plurality of second difference values are needed to be stored in actual storage, the second difference values are differences between the brightness compensation data of the pixel group and the minimum values, and when the difference between the maximum value and the minimum value is smaller than or equal to the first threshold value, the second difference values are also smaller than or equal to the first threshold value. Therefore, the second difference does not exceed the first threshold, and therefore, the amount of compensation data can be reduced by storing the minimum value and the second difference.
And restoring the brightness compensation data of each pixel group according to the minimum value and the second difference value, and further carrying out brightness compensation on each pixel group through the brightness compensation data of each pixel group.
In the luminance adjustment method of the present application, step S10 includes:
s11, acquiring the resolution of the target display device 1, and obtaining the number of horizontal pixels and the number of vertical pixels of the target display device 1 according to the resolution;
s12, dividing the display area of the target display device 1 into a plurality of compensation blocks according to the number of horizontal pixels and the number of vertical pixels, any one of the compensation blocks including the same number of pixel groups.
In step S11, the number of pixels of the target display device 1 can be obtained from the resolution of the target display device 1. For example, when the resolution of the target display device 1 is 3840×2160, the number of horizontal pixels representing the target display device 1 is 3840, and the number of vertical pixels of the target display device 1 is 2160. That is, the resolution of the target display device 1 corresponds to the number of horizontal pixels and the number of vertical pixels of the display device 1.
In step S12, the display area of the target display device 1 is divided into a plurality of compensation blocks according to the number of horizontal pixels and the number of vertical pixels, since the compensation blocks include the same number of pixel groups, and each pixel group includes the same number of pixels. Thus, each compensation block includes the same number of pixels.
Alternatively, in some embodiments, as shown in fig. 4, taking the target display device 1 with a resolution of 3840×2160 as an example, the compensation block is divided into 16×9, i.e., the number of horizontal pixels is equally divided into 16 parts, respectively designated as a to P, and the number of vertical pixels is equally divided into 9 parts, respectively designated as 1 to 9. After division, each compensation block includes 240×240 pixels. If a pixel group is set to include 8×8 pixels, each compensation block includes 30×30 pixel groups, that is, 30×30 pixel groups for the A1 region, the B1 region, and the P9 region, respectively. That is, one display device 1 may include 16×9 compensation blocks and 480×270 pixel groups.
As shown in fig. 5, the amount of compensation data increases as the resolution of the display device 1 increases. For example, FHD means a resolution of 1920×1080, ud means a resolution of 3840×2160, and 8k means a resolution of 7680×4320. The compensation data amount for the display device 1 of FHD is about 147492bytes, the compensation data amount for the display device 1 of UD is about 586579.5bytes, and the compensation data amount for the display device 1 of 8K is about 2339554.5bytes.
Correspondingly, in one compensation block, 1 maximum value, 1 minimum value, and 900 luminance compensation data are included.
In the luminance adjustment method of the present application, step S20 includes:
s21, acquiring the brightness of each pixel group of the target display device 1 under the gray-scale picture;
s22, setting the brightness of the pixel group with preset coordinates as target brightness, and obtaining the difference value between the brightness of other pixel groups and the target brightness;
s23, obtaining brightness compensation data of each pixel group under the corresponding gray-scale picture according to the difference value.
In step S21, the grayscale images refer to solid-color images with different brightness. The range of gray scale values is determined by the bit (bit) value of the display data of the display device. For example, 8bit display data corresponds to a gray scale value of 2 8 The range of gray scale values is 0 to 255, wherein 0 represents pure black, 255 represents pure white, numbers between 1 and 254 represent different gray scales, the gray scale close to pure black is low gray scale, the gray scale close to pure white is high gray scale, and the gray scale between the low gray scale and the high gray scale is medium gray scale. When the display data of the display device is m bits, the gray scale value is 2 correspondingly m The bit value of the display data of the display device is not limited by the level.
The display device 1 has different stain levels on different gray-scale pictures, and thus brightness adjustment is required for different gray-scale pictures. At least 3 gray-scale frames are typically selected, and the brightness of each pixel group corresponding to the target display device 1 under the 3 gray-scale frames is obtained.
It should be understood that, as shown in fig. 6, the greater the number of selected grayscale images, the higher the accuracy of compensation, the better the compensation effect, and accordingly, the greater the amount of compensation data that needs to be stored.
In the present embodiment, the manner of acquiring the luminance of the pixel group includes a test of the lighted display device 1 with a luminance test apparatus.
In the luminance adjustment method of the present application, step S21 includes:
s211, respectively obtaining the brightness of each pixel group of the target display device 1 under the first gray-scale picture, the second gray-scale picture and the third gray-scale picture, wherein the gray-scale value corresponding to the first gray-scale picture is smaller than the gray-scale value corresponding to the second gray-scale picture, and the gray-scale value corresponding to the second gray-scale picture is smaller than the gray-scale value corresponding to the third gray-scale picture.
It should be appreciated that the first gray scale frame may be a low gray scale frame, the second gray scale frame may be a medium gray scale frame, and the third gray scale frame may be a high gray scale frame. Taking an 8-bit display device as an example, the first gray-scale picture is selected from 0 to 48 gray-scale pictures, the second gray-scale picture is selected from 49 to 128 gray-scale pictures, and the third gray-scale picture is selected from 129 to 255 gray-scale pictures. The specific gray scale values of the low gray scale, the medium gray scale and the high gray scale can be varied, and the selection needs to be properly performed according to the overall situation of the display device 1.
In some embodiments, at least 3 gray-scale values may be selected from 16, 25, 32, 64, 128, 192, so as to obtain the brightness of each pixel group under the corresponding gray-scale frame. For example, the first gray-scale frame corresponds to a gray-scale frame including 16, 25, and 32 gray-scale frames, the middle gray-scale frame corresponds to a gray-scale frame including 64 and 128 gray-scale frames, and the high gray-scale frame corresponds to a gray-scale frame including 192 gray-scale frames. It should be noted that, since the human eye is more sensitive to the low gray level than to the high gray level, a low gray level picture can be generally selected, so as to obtain a better visual effect.
It should be understood that, as shown in fig. 7, fig. 7 illustrates a method of brightness compensation of a display device using a gray-scale compensation table. In fig. 7, the abscissa indicates gray scale values, and the ordinate indicates brightness of the display device 1. After the brightness of each pixel group corresponding to the 3 gray-scale pictures is obtained, a brightness compensation table of the 3 gray-scale pictures can be obtained. The brightness compensation data corresponding to other gray-scale pictures can be obtained by interpolation calculation through the known brightness compensation tables adjacent to the two sides of the gray-scale picture. If Gray B is the brightness compensation table under the corresponding B Gray-scale picture and Gray C is the brightness compensation table under the corresponding C Gray-scale picture, the brightness compensation table of Gray X can be obtained by interpolation calculation of the brightness compensation tables of Gray B and Gray C. Therefore, as described above, the greater the number of selected grayscale images, the higher the accuracy of compensation, and the better the compensation effect.
In step S22, the preset coordinates may be coordinates of a substantially near center position of the display area. The other pixel groups are other positions than the central position. And comparing the target brightness set by the brightness of the pixel group with the preset coordinates with the difference value between the brightness of other pixel groups and the target brightness.
In some embodiments, the preset coordinates may also be coordinates of a specific position of the display area, which is not limited in this application.
In step S23, luminance compensation data of the pixel group at other positions is determined according to the difference value, and the corresponding pixel group is compensated according to the luminance compensation data. Therefore, the brightness of the central position under the same gray-scale picture is consistent with the brightness of other positions, and the brightness adjusting effect is realized.
As shown in fig. 8, in the brightness adjustment method of the present application, step S20 further includes:
s50, when the first difference value between the maximum value and the minimum value of the brightness compensation data of the pixel groups in each compensation block is larger than a first threshold value, acquiring a third difference value between the number of pixels in each compensation block and the number of pixels in each pixel group;
s51, when the third difference value is greater than 0, increasing the number of compensation blocks in the target display device 1, and continuing to perform the step of acquiring the brightness compensation data of each pixel group in each compensation block until the first difference value is less than or equal to a first threshold value;
And S52, when the third difference value is smaller than or equal to 0, the first threshold value is increased, and the step of acquiring the brightness compensation data of each pixel group in each compensation block is continuously performed until the first difference value is smaller than or equal to the first threshold value.
In step S50, when the first difference is greater than the first threshold, a third difference between the number of pixels in each compensation block and the number of pixels in each pixel group is obtained.
When the third difference is greater than 0, i.e., the number of pixels included in the compensation block is greater than the number of pixels included in the pixel group, then the step of S51 is performed; when the third difference value is less than or equal to 0, that is, the number of pixels included in the compensation block is less than or equal to the number of pixels included in the pixel group, the step of S52 is performed.
In step S51, the number of pixels included in the compensation block is greater than the number of pixels included in the pixel group. Accordingly, the compensation block may be further divided, the number of divided compensation blocks increases, and the step S20 is continued.
It should be appreciated that as the number of divided compensation blocks increases, the first difference value of the divided compensation blocks may decrease such that the first difference value may approach the first threshold value more.
When executing step S20, if the first difference value in the divided compensation block is still greater than the first threshold value, step S50 is continuously executed until the first difference value is less than or equal to the first threshold value, and step S30 is executed.
In step S52, the number of pixels included in the compensation block is smaller than or equal to the number of pixels included in the pixel group. That is, the compensation block cannot be divided any more, which would result in the number of pixel groups contained in the compensation block being less than 1. Therefore, at this time, the first threshold may be selectively increased. After the first threshold is increased, and step S20 is continued.
It should be appreciated that the first difference may be less than or equal to the first threshold as the first threshold increases. If the first difference is still greater than the first threshold after the first threshold is increased, S50 is performed until the first difference is less than or equal to the first threshold, and step S30 is performed.
In the luminance adjustment method of the present application, the step of increasing the number of compensation blocks in the target display device 1 includes:
s511, the number of compensation blocks in the target display device 1 is increased by a preset multiple, which is a positive integer multiple.
In step S511, the preset multiple may be 1, 2, 3, etc., and only the preset multiple is required to be a positive integer multiple.
If the number of the compensation blocks is 16×9, when the preset multiple is 1, the number of the increased compensation blocks is 32×9. When the preset multiple is 2 times, the number of the added compensation blocks is 48 x 9. Since the number of horizontal pixels of the display device 1 is generally larger than the number of vertical pixels, the number of divisions in the horizontal direction of the compensation block should be larger than the number of divisions in the vertical direction of the compensation block.
In the luminance adjustment method of the present application, the step of increasing the first threshold value includes:
s521, increasing the preset initial value to obtain an increased preset initial value;
s522, determining an increased first threshold based on the increased preset initial value, where the first threshold and the preset initial value satisfy a preset relationship of k=2 n -1, wherein n is a positive integer, n is a preset initial value, K is a first threshold value.
In step S521, the preset initial value may be set as required, and the preset initial value after the increase is greater than the preset initial value before the increase.
In step S522, the increased first threshold value is determined based on the increased preset initial value. For example, the preset initial value may be 4, and the first threshold is 15. The preset initial value after the increase may be 5, and the first threshold is 31.
When needed, the brightness compensation data of each pixel group is typically 12 bits (bit), i.e., 1.5 bytes (byte). Since the initial value and the first threshold satisfy k=2 n -1, thus, when n is 4, the maximum and minimum values are less than or equal to the first threshold value, thus compensating for the blockThe value of the second difference does not exceed 15 and therefore the occupation of the second difference does not exceed 4 bits.
As shown in fig. 9, fig. 9 shows a comparison of the amounts of compensation data under the brightness adjustment methods of the display devices 1 of different resolutions. Curve S1 in the figure is the amount of compensation data in the related art; the other three curves in the figure show the corresponding data compensation amounts when n is 4, 5, 6, respectively. As is apparent from fig. 9, the amount of compensation of the embodiments of the present application is lower than that of the related art.
Taking the display device 1 with the resolution of 3840×2160 as an example, when the target display device 1 includes 16×9 compensation blocks, one pixel group includes 8×8 pixels, the luminance compensation data under 3 gray-scale frames is obtained, and n is 4, the compensation data amount in the related art is (horizontal pixel number/8+1) (vertical pixel number/8+1) ×1.5 bytes.
That is, in the related art, the compensation data amount is 481×271×1.5= 586579.5bytes, the compensation data amount of the display device 1 of the same type in the present application is (16×9×1.5+481×271×0.5) ×3= 196174.5bytes, and the compensation data amount is only 33.44% of the original compensation data amount, so that the cost of the display device 1 can be reduced without losing compensation information.
When the target display device 1 includes 32×18 compensation blocks, one pixel group includes 8×8 pixels, and the luminance compensation data under 3 gray-scale frames is obtained, n is 4, the compensation data amount of the display device 1 in the present application is 32×18×1.5+481×271×0.5) ×3= 193118.5bytes, and the compensation data amount is only 33.77% of the original value.
As shown in fig. 10, fig. 10 shows a comparison of the compensation data amounts under the brightness adjustment methods of different gray-scale pictures. Wherein, the curve S2 is the compensation data amount in the related art; the other three curves in the figure show the corresponding data compensation amounts when n is 4, 5, 6, respectively. As is apparent from fig. 10, the amount of compensation of the embodiments of the present application is lower than that of the related art.
When the target display device 1 includes 32×18 compensation blocks, one pixel group includes 8×8 pixels, and the luminance compensation data under 3 gray-scale frames is obtained, n is 6, the compensation data amount of the display device 1 in the present application is (16×9×1.5+481×271×0.75) ×3= 293937.75bytes, and the compensation data amount is only 50% of the original value. The compensation data amount is only 50% of the original data amount, and the number of gray-scale pictures with brightness adjusted can be increased from 3 to 6 under the same data amount, so that the compensation effect can be improved by increasing the number of gray-scale pictures.
In the brightness adjustment method of the present application, step S40 includes:
s41, obtaining the minimum value of brightness compensation data of the compensation block, and obtaining a second difference value of each pixel group in the corresponding compensation block;
s42, obtaining brightness compensation data of each pixel group in each compensation block according to the minimum value and the corresponding second difference value;
s43, compensating the brightness of each corresponding pixel group according to the brightness compensation data.
In step S42, the minimum value of the luminance compensation data of the compensation block is acquired, and one compensation block has one minimum value.
And obtaining second difference values of each pixel group in the corresponding compensation block, wherein the number of the second difference values is the same as the number of the pixel groups in one compensation block.
In step S42, luminance compensation data of each pixel group in one compensation block can be obtained based on one minimum value and a plurality of second difference values.
In step S43, the luminance of each pixel group is compensated according to the luminance compensation data of each pixel group.
As shown in fig. 11, based on the same inventive concept, the present application also provides a display device 1, the display device 1 including a display area, the display device 1 including:
a first dividing module 10 for dividing the display area of the target display device 1 into a plurality of compensation blocks, each of the compensation blocks including a plurality of pixel groups, each of the pixel groups including at least two pixels;
A brightness acquisition module 20 for acquiring brightness compensation data of each pixel group in each compensation block;
a first calculation module 30, configured to obtain a second difference value between the luminance compensation data and the minimum value of each pixel group in the compensation block when the first difference value between the maximum value and the minimum value of the luminance compensation data of each pixel group in the compensation block is less than or equal to a first threshold value;
the compensation module 40 is configured to compensate the brightness of each pixel group according to the minimum value and the second difference value.
As shown in fig. 12, in the display device 1 of the present application, the display device 1 further includes a second calculation module 50, and the second calculation module 50 includes:
an obtaining unit 51, configured to obtain a third difference value between the number of pixels in each compensation block and the number of pixels in each pixel group when the first difference value between the maximum value and the minimum value of the luminance compensation data of the pixel group in each compensation block is greater than a first threshold value;
a first operation unit 52, configured to increase the number of compensation blocks in the target display device 1 when the third difference is greater than 0, and continue to perform the step of obtaining the brightness compensation data of each pixel group in each compensation block until the first difference is less than or equal to the first threshold;
The second operation unit 53 is configured to increase the first threshold when the third difference value is less than or equal to 0, and continue to perform the step of acquiring the brightness compensation data of each pixel group in each compensation block until the first difference value is less than or equal to the first threshold.
In this embodiment, the display device 1 is further configured to: acquiring the resolution of the target display device 1, and obtaining the number of horizontal pixels and the number of vertical pixels of the target display device 1 according to the resolution; the display area of the target display device 1 is divided into a plurality of compensation blocks according to the number of horizontal pixels and the number of vertical pixels, and any one of the compensation blocks includes the same number of the pixel groups.
In this embodiment, the display device 1 is further configured to: acquiring the brightness of each pixel group of the target display device 1 under a gray-scale picture; setting the brightness of the pixel group with preset coordinates as target brightness, and obtaining the difference value between the brightness of other pixel groups and the target brightness; and acquiring brightness compensation data of each pixel group under the corresponding gray-scale picture according to the difference value.
In this embodiment, the display device 1 is further configured to: the brightness of each pixel group of the target display device 1 in a first gray-scale picture, a second gray-scale picture and a third gray-scale picture is respectively obtained, wherein the gray-scale value corresponding to the first gray-scale picture is smaller than the gray-scale value corresponding to the second gray-scale picture, and the gray-scale value corresponding to the second gray-scale picture is smaller than the gray-scale value corresponding to the third gray-scale picture.
In this embodiment, the display device 1 is further configured to: the number of the compensation blocks in the target display device 1 is increased by a preset multiple, which is a positive integer multiple.
In this embodiment, the display device 1 is further configured to: adding the preset initial value to obtain an added preset initial value; determining the first threshold after the increase based on the preset initial value after the increase, wherein the first threshold and the preset initial value meet a preset relation, and the preset relation is k=2 n -1, wherein n is a positive integer, n is the preset initial value, K is the first threshold value.
In this embodiment, the display device 1 is further configured to: acquiring the minimum value of brightness compensation data of the compensation block, and acquiring a second difference value of each pixel group in the corresponding compensation block; acquiring brightness compensation data of each pixel group in each compensation block according to the minimum value and the corresponding second difference value; and compensating the brightness of each corresponding pixel group according to the brightness compensation data.
In this embodiment, the display device 1 may be used for any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The above description is provided in detail for a method for adjusting brightness of a display device and a display device provided by the embodiments of the present application, and specific examples are applied to describe the principles and embodiments of the present application, where the description of the above embodiments is only for helping to understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A brightness adjustment method of a display device, wherein the display device includes a display area, the brightness adjustment method of the display device comprising:
dividing a display area of a target display device into a plurality of compensation blocks, wherein each compensation block comprises a plurality of pixel groups, and each pixel group comprises at least two pixels;
Acquiring brightness compensation data of each pixel group in each compensation block;
when a first difference value of a maximum value and a minimum value of the brightness compensation data of the pixel groups in each compensation block is smaller than or equal to a first threshold value, obtaining a second difference value of the brightness compensation data of each pixel group in the compensation block and the minimum value;
and compensating the brightness of each pixel group according to the minimum value of the brightness compensation data and the second difference value.
2. The method of adjusting brightness of a display device according to claim 1, wherein the step of dividing the display area of the target display device into a plurality of compensation blocks, each of the compensation blocks including a plurality of pixel groups, each of the pixel groups including at least two pixels, comprises:
acquiring the resolution of the target display device, and obtaining the number of horizontal pixels and the number of vertical pixels of the target display device according to the resolution;
the display area of the target display device is divided into a plurality of compensation blocks according to the number of horizontal pixels and the number of vertical pixels, and any one of the compensation blocks includes the same number of the pixel groups.
3. The method of claim 1, wherein the step of obtaining the brightness compensation data of each of the pixel groups in each of the compensation blocks comprises:
Acquiring the brightness of each pixel group of the target display device under a gray-scale picture;
setting the brightness of the pixel group with preset coordinates as target brightness, and obtaining the difference value between the brightness of other pixel groups and the target brightness;
and acquiring brightness compensation data of each pixel group under the corresponding gray-scale picture according to the difference value.
4. A brightness adjustment method of a display device according to claim 3, wherein the step of obtaining the brightness of each of the pixel groups of the target display device under a grayscale screen comprises:
and respectively acquiring the brightness of each pixel group of the target display device under a first gray-scale picture, a second gray-scale picture and a third gray-scale picture, wherein the gray-scale value corresponding to the first gray-scale picture is smaller than the gray-scale value corresponding to the second gray-scale picture, and the gray-scale value corresponding to the second gray-scale picture is smaller than the gray-scale value corresponding to the third gray-scale picture.
5. The method of claim 1, wherein the step of obtaining the brightness compensation data of each of the pixel groups in each of the compensation blocks further comprises:
when a first difference value between a maximum value and a minimum value of brightness compensation data of the pixel groups in each compensation block is larger than the first threshold value, obtaining a third difference value between the number of pixels in each compensation block and the number of pixels in each pixel group;
When the third difference value is greater than 0, increasing the number of the compensation blocks in the target display device, and continuing to perform the step of acquiring the brightness compensation data of each pixel group in each compensation block until the first difference value is less than or equal to the first threshold value;
and when the third difference value is smaller than or equal to 0, the first threshold value is increased, and the step of acquiring the brightness compensation data of each pixel group in each compensation block is continued until the first difference value is smaller than or equal to the first threshold value.
6. The method of adjusting brightness of a display device according to claim 5, wherein the step of increasing the number of the compensation blocks in the target display device comprises:
and increasing the number of the compensation blocks in the target display device according to a preset multiple, wherein the preset multiple is a positive integer multiple.
7. The method of claim 5, wherein the step of increasing the first threshold value comprises:
adding the preset initial value to obtain an added preset initial value;
determining the first threshold after the increase based on the preset initial value after the increase, wherein the first threshold and the preset initial value meet a preset relation, and the preset relation is k=2 n -1, wherein n is a positive integer, n is the preset initial value, K is the first threshold value.
8. The method of adjusting brightness of a display device according to claim 1, wherein the step of compensating the brightness of each of the pixel groups according to the minimum value and the second difference value comprises:
acquiring the minimum value of brightness compensation data of the compensation block, and acquiring the second difference value of each pixel group in the corresponding compensation block;
acquiring brightness compensation data of each pixel group in each compensation block according to the minimum value and the corresponding second difference value;
and compensating the brightness of each corresponding pixel group according to the brightness compensation data.
9. A display device, the display device comprising a display area, the display device comprising:
a first dividing module, configured to divide a display area of a target display device into a plurality of compensation blocks, each of the compensation blocks including a plurality of pixel groups, each of the pixel groups including at least two pixels;
the brightness acquisition module is used for acquiring brightness compensation data of each pixel group in each compensation block;
a first calculation module, configured to obtain a second difference value between the luminance compensation data of each pixel group in the compensation block and the minimum value when a first difference value between the maximum value and the minimum value of the luminance compensation data of each pixel group in the compensation block is less than or equal to a first threshold value;
And the compensation module is used for compensating the brightness of each pixel group according to the minimum value and the second difference value.
10. The display device of claim 9, further comprising a second computing module, the second computing module comprising:
an obtaining unit, configured to obtain a third difference value between the number of pixels in each compensation block and the number of pixels in each pixel group when a first difference value between a maximum value and a minimum value of brightness compensation data of the pixel group in each compensation block is greater than a first threshold value;
a first operation unit configured to increase the number of the compensation blocks in the target display device when the third difference value is greater than 0, and continue the step of acquiring the brightness compensation data of each pixel group in each compensation block until the first difference value is less than or equal to the first threshold value;
and the second operation unit is used for increasing the first threshold value when the third difference value is smaller than or equal to 0, and continuing to execute the step of acquiring the brightness compensation data of each pixel group in each compensation block until the first difference value is smaller than or equal to the first threshold value.
CN202311625672.7A 2023-11-29 2023-11-29 Brightness adjusting method of display device and display device Pending CN117496884A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117809574A (en) * 2024-03-01 2024-04-02 欣瑞华微电子(上海)有限公司 Demura method based on clustering and display device
CN118098126A (en) * 2024-04-26 2024-05-28 瑞旦微电子技术(上海)有限公司 Demura data storage method and display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117809574A (en) * 2024-03-01 2024-04-02 欣瑞华微电子(上海)有限公司 Demura method based on clustering and display device
CN117809574B (en) * 2024-03-01 2024-04-30 欣瑞华微电子(上海)有限公司 Demura method based on clustering and display device
CN118098126A (en) * 2024-04-26 2024-05-28 瑞旦微电子技术(上海)有限公司 Demura data storage method and display device

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