CN111009207A - Method and device for improving display unevenness of display screen - Google Patents

Method and device for improving display unevenness of display screen Download PDF

Info

Publication number
CN111009207A
CN111009207A CN201911357102.8A CN201911357102A CN111009207A CN 111009207 A CN111009207 A CN 111009207A CN 201911357102 A CN201911357102 A CN 201911357102A CN 111009207 A CN111009207 A CN 111009207A
Authority
CN
China
Prior art keywords
sub
brightness compensation
brightness
value
pixel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201911357102.8A
Other languages
Chinese (zh)
Other versions
CN111009207B (en
Inventor
汪伶俐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Tianma Microelectronics Co Ltd
Original Assignee
Wuhan Tianma Microelectronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Tianma Microelectronics Co Ltd filed Critical Wuhan Tianma Microelectronics Co Ltd
Priority to CN201911357102.8A priority Critical patent/CN111009207B/en
Publication of CN111009207A publication Critical patent/CN111009207A/en
Application granted granted Critical
Publication of CN111009207B publication Critical patent/CN111009207B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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]
    • G09G3/3225—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] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix

Landscapes

  • 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)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The application provides a method and a device for improving display unevenness of a display screen, which relate to the technical field of display, wherein the method comprises the steps of obtaining first actual brightness of each sub-pixel in a display area of a display panel; calculating an initial brightness compensation value required by each sub-pixel; obtaining a plurality of brightness compensation units for the display area, obtaining a first average value of initial brightness compensation values of all sub-pixels in each brightness compensation unit, when the absolute difference value between the first average value and the initial brightness compensation value of at least one sub-pixel in any brightness compensation unit is greater than a preset difference value, dividing the brightness compensation transition area of the brightness compensation unit corresponding to the sub-pixel, and calculating a second average value of the first average values of the sub-pixels in the adjacent brightness compensation transition areas, wherein the second average value is a second actual brightness compensation value of all sub-pixels in two adjacent brightness compensation transition areas in the adjacent brightness compensation units; therefore, the display effect of the display screen is improved.

Description

Method and device for improving display unevenness of display screen
Technical Field
The invention relates to the technical field of display, in particular to a method and a device for improving display unevenness of a display screen.
Background
Since the flat panel display device has advantages of high image quality, power saving, thin body, and wide application range, it is widely applied to various consumer electronic products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, desktop computers, and the like, and becomes the mainstream of the display device. Conventional flat panel display devices include Liquid Crystal Display (LCD) devices and Organic Light-Emitting Diode (OLED) devices.
At present, in the production process of a flat display panel, because of production processes and the like, Mura defects are often generated, the Mura defects refer to the phenomenon of various marks caused by uneven brightness of the display panel, the marks can be horizontal line stripes or forty-five degree angle stripes, can be blocks which are cut straightly, can be a corner, or can be marks which have no regular expression, and the display area with various marks is usually changed into a Mura area.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for improving uneven brightness of a display screen, so as to improve brightness uniformity of the display screen with uneven display after compensation of a Mura region, and further improve display weakening of the display screen.
In a first aspect, the present application provides a method for improving display unevenness of a display screen, including:
the display panel comprises a display area, wherein the display area comprises a plurality of sub-pixels arranged in an array;
acquiring first actual brightness of each sub-pixel in the display panel under a preset gray scale;
calculating an initial brightness compensation value required by each sub-pixel according to a corresponding relation between a preset gray scale and the brightness of the sub-pixel and by combining the first actual brightness of each sub-pixel under the preset gray scale;
partitioning the display area to obtain a plurality of brightness compensation units, wherein any brightness compensation unit comprises at least one sub-pixel;
averaging the initial brightness compensation values of all the sub-pixels under a preset gray scale in each brightness compensation unit to obtain a first average value, wherein the first average value is a first actual brightness compensation value of each sub-pixel under the preset gray scale of the corresponding brightness compensation unit;
when the absolute difference value between the first average value of at least one sub-pixel in any one of the brightness compensation units under a preset gray scale and the corresponding initial brightness compensation value is greater than a preset difference value, dividing a brightness compensation transition region of the brightness compensation unit corresponding to the sub-pixel, wherein the brightness compensation transition region is positioned on one side of the brightness compensation unit close to another brightness compensation unit adjacent to the brightness compensation unit;
and calculating a second average value of the first average values of all the sub-pixels in the brightness compensation transition area of the sub-pixel and the brightness compensation transition area in the brightness compensation transition area of the adjacent brightness compensation unit, wherein the second average value is a second actual brightness compensation value of all the sub-pixels in two adjacent brightness compensation transition areas which are corresponding to the adjacent brightness compensation unit under a preset gray scale.
In a second aspect, the present application provides an apparatus for improving display unevenness of a display screen, the apparatus comprising:
the pixel brightness acquisition module is used for acquiring first actual brightness of each sub-pixel in a display area of the display panel under a preset gray scale;
the initial brightness compensation value calculating module is used for calculating an initial brightness compensation value required by each sub-pixel according to the preset corresponding relation between the gray scale and the sub-pixel brightness and by combining the first actual brightness of each sub-pixel under the preset gray scale;
the final brightness compensation value calculating module is used for dividing the display area into a plurality of brightness compensation units, and averaging the initial brightness compensation values of all the sub-pixels under a preset gray scale in each brightness compensation unit to obtain a first average value, wherein the first average value is a first actual brightness compensation value of each sub-pixel under the preset gray scale of the corresponding brightness compensation unit; when the absolute difference value between the first average value of at least one sub-pixel in any one of the brightness compensation units under a preset gray scale and the corresponding initial brightness compensation value is greater than a preset difference value, performing brightness compensation transition region division on the brightness compensation unit corresponding to the sub-pixel, and calculating a second average value of the first average values of all the sub-pixels in the brightness compensation transition region of the sub-pixel and the brightness compensation transition region in the brightness compensation unit which is adjacently arranged, wherein the second average value is a second actual brightness compensation value of all the sub-pixels in two adjacent brightness compensation transition regions, and the second brightness compensation value is a final brightness compensation value of all the sub-pixels in the two adjacent brightness compensation transition regions; when the absolute difference between the first average value of all the sub-pixels in any one of the brightness compensation units at a preset gray scale and the corresponding initial brightness compensation value is less than or equal to the preset difference, if the absolute difference between the first average value of all the sub-pixels in all the brightness compensation units adjacent to the brightness compensation unit at the preset gray scale and the corresponding initial brightness compensation value is less than or equal to the preset difference, the first actual brightness compensation value in the adjacent brightness compensation unit is the final brightness compensation value of the corresponding sub-pixel.
Compared with the prior art, the method and the device for improving the display unevenness of the display screen, provided by the invention, at least realize the following beneficial effects:
this application carries out luminance compensation with its first actual brightness compensation value through every subpixel in to display panel earlier, and then through the condition that luminance difference still appears in any subpixel in two adjacent brightness compensation transition areas between the adjacent brightness compensation unit after to the compensation with the actual brightness compensation value of second as final brightness compensation value, with this luminance difference on the weakening display panel, still appear after the compensation of display panel Mura regional the display screen that shows the inequality and carry out the improvement of luminance homogenization, improve the display effect of display screen, be favorable to promoting user's use and experience.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart illustrating a method for improving display uniformity of a display screen according to an embodiment of the present disclosure;
FIG. 2 is a top view of a display panel in a method for improving display uniformity of a display screen according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating a method for calculating an actual brightness compensation value of a group of adjacent brightness compensation units in the method for improving display non-uniformity of a display screen according to the embodiment of the present application;
fig. 4 is a schematic diagram illustrating a method for calculating an actual brightness compensation value of a group of three adjacent brightness compensation units in the method for improving display non-uniformity of a display screen according to the embodiment of the present application;
fig. 5 is another flowchart illustrating a method for improving display uniformity of a display screen according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating a second average value calculation of a group of adjacent brightness compensation units in the method for improving display uniformity of a display screen according to the embodiment of the present application;
FIG. 7 is a schematic diagram illustrating a method for calculating an actual illumination compensation value of a group of adjacent illumination compensation units shown in FIG. 6 according to an embodiment of the present disclosure;
fig. 8 is a block diagram illustrating an apparatus for improving display uniformity of a display screen according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the prior art, a method for processing a Mura region of a display panel includes: acquiring screen brightness information, detecting Mura, and compensating the brightness of the Mura area to be ideal brightness. However, the luminance of the Mura region corrected by the conventional technique may not match the change trend of the peripheral luminance, and a new unevenness may be introduced. Therefore, it is desirable to provide a method for improving a display panel in which display unevenness still occurs after the Mura compensation.
In view of this, the present invention provides a method and an apparatus for improving uneven brightness of a display screen, so as to improve brightness uniformity of the display screen with uneven display after compensation of a Mura region, and further improve display weakening of the display screen.
Fig. 1 is a flowchart illustrating a method for improving display uniformity of a display screen according to an embodiment of the present disclosure, fig. 2 is a top view illustrating a display panel in the method for improving display uniformity of a display screen according to the embodiment of the present disclosure, fig. 3 is a schematic diagram illustrating a method for calculating an actual brightness compensation value of a group of adjacent brightness compensation units in the method for improving display uniformity of a display screen according to the embodiment of the present disclosure, and fig. 4 is a schematic diagram illustrating a method for calculating an actual brightness compensation value of three adjacent brightness compensation units in the method for improving display uniformity of a display screen according to the embodiment of the present disclosure; referring to fig. 1 to 4, the present application provides a method for improving display unevenness of a display screen, including:
step 101, displaying a panel 100, wherein the display panel 100 comprises a display area 11, and the display area 11 comprises a plurality of sub-pixels 12 arranged in an array;
102, acquiring first actual brightness of each sub-pixel 12 in the display panel 100 under a preset gray scale;
103, calculating an initial brightness compensation value required by each sub-pixel 12 according to a preset corresponding relation between the gray scale and the brightness of the sub-pixel 12 and by combining the first actual brightness of each sub-pixel 12 under the preset gray scale;
104, partitioning the display area 11 to obtain a plurality of brightness compensation units 13, wherein any brightness compensation unit 13 comprises at least one sub-pixel 12;
105, averaging the initial brightness compensation values of all the sub-pixels 12 at the preset gray scale in each brightness compensation unit 13 to obtain a first average value, where the first average value is a first actual brightness compensation value of each sub-pixel 12 at the preset gray scale of the corresponding brightness compensation unit 13;
step 106, when the absolute difference between the first average value of at least one sub-pixel 12 in any one of the luminance compensation units 13 under the preset gray scale and the corresponding initial luminance compensation value is greater than the preset difference, dividing the luminance compensation transition region of the luminance compensation unit 13 corresponding to the sub-pixel 12, where the luminance compensation transition region is located at one side of the luminance compensation unit 13 close to another luminance compensation unit adjacent to the luminance compensation unit;
step 107, calculating a second average value of the first average values of all the sub-pixels 12 in the luminance compensation transition region of the sub-pixel 12 and the luminance compensation transition region of the neighboring luminance compensation unit 13, where the second average value is a second actual luminance compensation value of all the sub-pixels 12 in two neighboring luminance compensation transition regions corresponding to the neighboring luminance compensation unit 13 under the preset gray scale.
Referring to fig. 1 to 5, in particular, the present application provides a method for improving a display screen with uneven display after compensating for a Mura area of a display panel, the method comprising: a display panel 100 with a display unevenness problem to be improved is obtained through step 101, wherein a display area 11 of the display panel 100 to be improved includes a plurality of sub-pixels 12 arranged in an array, and each sub-pixel 12 can be regarded as a light emitting point. The first actual brightness of each sub-pixel 12 in the display panel 100 to be improved at the preset gray scale is obtained through step 102, that is, the brightness of the display panel 100 is obtained at the preset gray scale, so as to obtain the first actual brightness of each sub-pixel 12 at the preset gray scale.
In step 103, according to the preset corresponding relationship between the gray scale and the sub-pixels 12, the first actual brightness of each sub-pixel 12 at the preset gray scale obtained in step 102 is combined to calculate the initial brightness compensation value required by each sub-pixel 12; the initial brightness compensation value here corresponds to the difference between the target brightness and the first actual brightness of the sub-pixel 12 in the display screen to be improved, and the difference here may be a positive value, a negative value or zero. When the difference is a positive value, the corresponding sub-pixel 12 has a lower brightness than the sub-pixel 12 with the preset brightness, and the sub-pixel 12 is in a darker display state and needs to be compensated and increased in brightness; when the difference is a negative value, the corresponding sub-pixel 12 has a higher brightness than the sub-pixel 12 with the preset brightness, and the brightness needs to be weakened; when the difference is zero, the luminance of the corresponding sub-pixel 12 is the same as the preset luminance, and the luminance of the sub-pixel 12 may not need to be improved.
The display area 11 of the display panel 100 is partitioned through the step 104 to obtain a plurality of brightness compensation units 13, where the brightness compensation units 13 may cover the entire display area 11 of the display panel 100, or only cover the display area 11 with uneven display. Any of the divided luminance compensation units 13 includes at least one sub-pixel 12, for example, as shown in fig. 2, 16 sub-pixels 12 in the luminance compensation unit 131 may be used as one luminance compensation unit 13, 30 sub-pixels 12 in the luminance compensation unit 132 may be used as one luminance compensation unit 13, and 20 sub-pixels 12 in the luminance compensation unit 133 may be used as one luminance compensation unit 13; that is to say, the present application does not limit the area size of the luminance compensation unit 13 obtained by partitioning, or the number of the sub-pixels 12 included in each luminance compensation unit 13 is not specifically limited, and the adjustment is performed according to the position of the dark area/dark spot or the bright area/bright spot appearing on the display panel 100 during actual operation. In order to improve the display effect of the display screen, as shown in fig. 3, two adjacent rows and four adjacent columns of sub-pixels 12 may be used as a brightness compensation unit 13, but the present application is not limited thereto, and only an alternative partitioning manner is provided herein for reference.
Obtaining a first average value by averaging the initial brightness compensation values of all the sub-pixels 12 in the preset gray scale in each brightness compensation unit 13 in step 105, for example, as shown in fig. 3, when each brightness compensation unit 13 includes 8 sub-pixels 12 in two rows and four columns, the initial brightness compensation values of the eight sub-pixels 12 are added and then averaged, and the obtained first average value is the first average value of the eight sub-pixels 12 in two rows and four columns; the first average value is the first actual brightness compensation value of each sub-pixel 12 of the corresponding brightness compensation unit 13 at the preset gray level.
Comparing the first average value of the sub-pixel 12 in each of the adjacent brightness compensation units 13 at the preset gray scale with the corresponding initial brightness compensation value in step 106, wherein when the absolute difference between the first average value of at least one sub-pixel 12 in any one of the brightness compensation units 13 and the corresponding initial brightness compensation value is greater than the preset difference, the sub-pixel 12 will have a dark spot/bright spot; the brightness compensation transition area of the brightness compensation unit 13 where the sub-pixel 12 with the dark spot/bright spot appears is further divided, the corresponding brightness compensation unit 13 comprises at least one brightness compensation transition area, the brightness compensation transition area is arranged close to another brightness compensation unit 13 which is arranged adjacent to the brightness compensation transition area, and the row and column number of the sub-pixel 12 included in the brightness compensation transition area in one brightness compensation unit 13 can be divided according to the row and column number included in the brightness compensation unit 13 which is arranged adjacent to the brightness compensation unit; as shown in fig. 2, only some of the luminance compensation transition regions 1311, 1321, and 1331 of the luminance compensation units 131, 132, and 133 are shown, the luminance compensation transition region 1311 is disposed adjacent to the luminance compensation transition region 1321 of the luminance compensation unit 132 disposed adjacent thereto, and the luminance compensation transition region 1311 includes two columns of sub-pixels 12, the luminance compensation transition region 1321 includes three columns of sub-pixels 12, and the luminance compensation transition region 1331 of the luminance compensation unit 133 disposed adjacent to the luminance compensation transition region 1321 also includes two columns of sub-pixels 12, that is, the number of sub-pixels 12 included in the luminance compensation transition region disposed adjacent to the luminance compensation transition region is not specifically limited, the size of the luminance compensation transition region is adjusted according to the number/area of the sub-pixels 12 occupied by the dark/dark or bright area/bright area in the luminance compensation unit 13, and each luminance compensation transition region is ensured to cover the sub-pixels 12 with the dark/dark or bright area, it is also preferable to include a plurality of sub-pixels 12 with relatively normal brightness to improve the area of the sub-pixels 12 where dark/dark or bright areas/bright spots appear on the display panel 100.
Then, the second average value of the first average values of all the sub-pixels 12 in the luminance compensation transition region of the sub-pixel 12 and the luminance compensation transition region of the luminance compensation unit 13 disposed adjacent to the sub-pixel is calculated through step 107; the first actual luminance compensation value of each sub-pixel 12 obtained by the luminance compensation unit 131 shown in figure 3 after the first averaging is 7 for example, since the difference between 7 and the initial illumination compensation value 20 is large, the illumination compensation at the bottom right corner of the illumination compensation unit 131 is insufficient, a dark area still exists, therefore by using a column of sub-pixels 12 in the illumination compensation unit 131 adjacent to the illumination compensation unit 132 as the illumination compensation transition region 1311, a column of sub-pixels 12 adjacent to the luminance compensation unit 131 in the luminance compensation unit 132 serves as a luminance compensation transition area 1321, the second average value obtained by calculating the second average value of the first average values of all the sub-pixels 12 in the two adjacent brightness compensation transition areas 1321 is the second actual brightness compensation value of the sub-pixel 12 included in the two adjacent brightness compensation transition areas corresponding to the adjacent brightness compensation unit 13 under the preset gray scale. Through the steps, the first actual brightness compensation value and the second actual brightness compensation value of each brightness compensation unit 13 are obtained, and the brightness compensation of the corresponding sub-pixel 12 is performed by taking each brightness compensation unit 13 as a whole, so that the obvious too-dark or too-bright area in the same display screen is weakened, the display effect of the display screen is improved, and better use experience is brought to a user.
Specifically, fig. 3 shows two adjacent luminance compensation units 131 and 132, wherein the initial luminance compensation values of the 8 corresponding sub-pixels 12 in the luminance compensation unit 131 are 2, 4, 2, 20, and 20, respectively, and the initial luminance compensation values of the 8 corresponding sub-pixels 12 in the luminance compensation unit 132 are 21, 17, 30, 28, and 28, respectively, that is, the 16 exemplary sub-pixels 12 have lower average luminance than the target luminance, and the initial luminance compensation values required for the respective sub-pixels are positive numbers, so as to compensate the luminance of the corresponding sub-pixels 12 to the target luminance value; first average values of the brightness compensation units 131 and 132 are obtained, the first actual compensation value of each sub-pixel 12 in the brightness compensation unit 131 is 7, and the first actual compensation value of each sub-pixel 12 in the brightness compensation unit 132 is 24; because the difference between the initial luminance compensation value 20 at the lower right corner of the luminance compensation unit 131 and the first actual compensation value 7 is large, after the sub-pixel 12 at the lower right corner of the luminance compensation unit 131 is compensated by using the first actual compensation value 7, the sub-pixel 12 therein still appears in a dark state, that is, under-compensation occurs, and the initial luminance compensation value 30 at the lower left corner of the luminance compensation unit 132 and the first actual compensation value 24 also have a certain difference and also under-compensation occurs, so even after the positions adjacent to the luminance compensation unit 131 and the luminance compensation unit 132 are respectively improved by using the first actual compensation value, a dark fringe phenomenon formed by four dark spots still occurs due to the large luminance difference; therefore, in the present application, a column of sub-pixels 12 adjacent to the brightness compensation unit 132 in the brightness compensation unit 131 is used as the brightness compensation transition region 1311, a column of sub-pixels 12 adjacent to the brightness compensation unit 132 in the brightness compensation unit 131 is used as another brightness compensation transition region 1321, and the adjacently disposed brightness compensation transition regions 1311 and 1321 are averaged again, that is, the first average values 7, 24, and 24 of the sub-pixels 12 in two adjacent columns in the brightness compensation unit 131 and the brightness compensation unit 132 are averaged again to obtain the second average value 15.5, where the calculated second average value is the second actual brightness compensation value, and the second actual brightness compensation value is used as the brightness compensation value of all the sub-pixels 12 included in the adjacent brightness compensation transition regions 1311 and 1321 of the two adjacent brightness compensation units 131 and 132.
Fig. 4 shows three brightness compensation units 131, 132, and 133 adjacently disposed, wherein, the initial brightness compensation values of the 8 corresponding sub-pixels 12 in the brightness compensation unit 131 are respectively 3, 0, -3 and-3, the initial brightness compensation values of the 16 corresponding sub-pixels 12 in the brightness compensation unit 132 are respectively 15, -1, 0, -8, 5, 3, 15 and 15, the initial brightness compensation values of the 8 corresponding sub-pixels 12 in the brightness compensation unit 133 are respectively 20, 5, 6, 5 and 5, that is, in the three luminance compensation units 131, 132, and 133 exemplified here, there are the sub-pixels 12 that need to enhance the luminance, there are also the sub-pixels 12 that need to darken the luminance, and the sub-pixels 12 that have the same luminance as a preset value and may not be subjected to the improvement processing; the first actual compensation value of each sub-pixel 12 in the luminance compensation unit 131 is 0, the first actual compensation value of each sub-pixel 12 in the luminance compensation unit 132 is 3.5, and the first actual compensation value of each sub-pixel 12 in the luminance compensation unit 133 is 9, which are obtained by respectively performing first average value calculation on the sub-pixels 12 in the luminance compensation units 131, 132, and 133; it can be seen that, after the first average value is obtained by the sub-pixel 12 whose original required initial compensation brightness value on the left side in the brightness compensation unit 132 is 15 and-8, the first average value is 3.5, where the difference between the corresponding first average value and the initial brightness compensation value is large, so that the sub-pixel 12 whose original required initial compensation brightness value is 15 will have an under-compensation problem if compensated by the first average value of 3.5, the corresponding sub-pixel 12 will still show a dark state, and the sub-pixel 12 whose original required initial compensation brightness value is-8 will have an over-compensation problem if compensated by the first average value of 3.5, so that the brightness of the sub-pixel 12 whose brightness needs to be reduced is higher, therefore, the area where the 6 sub-pixels 12 on the top left corner in the brightness compensation unit 132 are located in the brightness compensation unit 132 is used as a brightness compensation transition area 1323, and the two rows of sub-pixels 12 close to the brightness compensation unit 132 in the brightness compensation unit 133 that is arranged adjacent to the brightness compensation transition area 1323 are used as a brightness compensation transition area 132 A compensation transition region 1332, which is used for calculating a second average value based on the first average value for all the sub-pixels 12 in the luminance compensation transition region 1323 and the luminance compensation transition region 1332, and obtaining the second average values of the sub-pixels 12 in the two luminance compensation transition regions 1323 and 1332, which are both 4.875, where the second average value obtained by calculation is used as a second actual luminance compensation value; for example, the original luminance compensation value originally required for the two sub-pixels 12 at the lower left corner of the luminance compensation transition unit 132 is-8, and if the first average value is 3.5 for compensation, the luminance of the two sub-pixels is made to be higher, so that the second average value is obtained by performing the second average value calculation with the luminance compensation transition region 1312 and the luminance compensation transition region 1311 in the luminance compensation unit 131 respectively through the luminance compensation transition region 1322 and the luminance compensation transition region 1321, and the obtained second average values are 2.65 and 1.75 respectively, compared with the first average value as the actual compensation value, the luminance of the sub-pixel 12 is compensated by the second actual luminance compensation value, which is beneficial to moderate the sub-pixel regions where the over-bright and over-dark regions originally appear in the luminance compensation units 133 and 132 to a certain extent, and weaken the situation of the obvious dark/dark spots or bright spots appearing in the display panel 100, favorable for good display effect of the display panel 100.
Fig. 4 also shows that the second average value is obtained in the luminance compensation transition region 1313 in the luminance compensation unit 131 and the luminance compensation transition region 1331 in the luminance compensation unit 133, and finally, the second average value obtained by the sub-pixels 12 included in every two adjacent luminance compensation transition regions is used as the corresponding second actual luminance compensation value, so as to compensate the luminance of the sub-pixels 12 with the second actual luminance compensation value, which is beneficial to relaxing the sub-pixel regions of the regions that originally appear too bright and too dark in the adjacent luminance compensation units 13, weakening the condition of the obvious dark regions/dark spots or bright regions/bright spots appearing in the display panel, and being beneficial to the good display effect of the display panel.
It should be noted that, when the first average value (the first actual brightness compensation value) of any one of the sub-pixels 12 in any one of the brightness compensation units 13 is compared with the initial brightness compensation value, and a difference having an influence on the picture display occurs, the second average value of all the sub-pixels 12 in two adjacent brightness compensation transition regions in the adjacent brightness compensation units can be further calculated, and the second average value is used as the second actual brightness compensation value of the corresponding sub-pixel 12, so as to reduce the occurrence of an obvious dark area/dark point or a bright area/bright point in the display panel 100.
Fig. 5 is another flowchart of the method for improving display non-uniformity of a display screen according to the embodiment of the present application, please refer to fig. 2-5, optionally, in step 108, when absolute differences between first average values of all sub-pixels 12 in any brightness compensation unit 13 at the preset gray level and corresponding initial brightness compensation values are less than or equal to the preset difference;
if the absolute difference between the first average value of all the sub-pixels 12 in all the brightness compensation units 13 adjacent to the first actual brightness compensation value in the adjacent brightness compensation unit 13 at the preset gray scale and the corresponding initial brightness compensation value is less than or equal to the preset difference, the first actual brightness compensation value in the adjacent brightness compensation unit 13 is the final brightness compensation value of the corresponding sub-pixel 12.
Specifically, the method for improving the uneven brightness of the display screen further includes step 108, when the absolute difference between the first average value and the initial brightness compensation value of the sub-pixel 12 in any one of the brightness compensation units 13 at the preset gray scale is less than or equal to the preset difference, it indicates that the brightness of the sub-pixel 12 in the brightness compensation unit 13 is not abnormal by using the first average value as the first actual brightness compensation value to regulate and control the brightness of the sub-pixel 12 in the brightness compensation unit 13; at this time, if the absolute difference values between the first average value of all the sub-pixels 12 in the other brightness compensation units 13 adjacent to the brightness compensation unit 13 at the preset gray scale and the corresponding initial brightness compensation value are also less than or equal to the preset difference value, it is indicated that none of the sub-pixels 12 in the adjacent brightness compensation units 13 needs to be provided with a brightness compensation transition region to improve the sub-pixels again, that is, the first actual brightness compensation value is used as the final brightness compensation value of the corresponding sub-pixel 12.
Referring to fig. 2 to fig. 5, optionally, in step 109, when the absolute difference between the first average value at the preset gray level and the corresponding initial brightness compensation value in at least one of the adjacent brightness compensation units 13 is greater than the preset difference, the second actual brightness compensation value is the final brightness compensation value of all the sub-pixels 12 in the two adjacent brightness compensation transition regions in the adjacent brightness compensation unit 13.
Specifically, the method for improving the uneven brightness of the display screen further includes step 109, when an absolute difference between a first average value and a corresponding initial brightness compensation value is greater than a preset difference in at least one brightness compensation unit 13 of the brightness compensation units 13 arranged adjacently, it indicates that the sub-pixel 12 corresponding to the first average value still cannot improve the abnormal brightness in the display area 11 of the display panel 100 if the first average value is used as a final brightness compensation value, that is, the problem that the display area 11 has a dark area/dark spot or a bright area/bright spot still exists; it is therefore necessary to find a second average value of the first average values of the sub-pixels 12 included in the adjacently disposed luminance compensation transition areas in the luminance compensation unit 13, i.e. a second actual luminance compensation value, as a final luminance compensation value for all the sub-pixels 12 in the adjacently disposed luminance compensation transition areas in the adjacently disposed luminance compensation unit 13, through step 107. By the method, the brightness uniformity of the display screen with uneven display after the Mura area compensation of the display panel is improved, the display effect of the display screen is further improved, and the use experience of a user is improved.
Fig. 6 is a schematic diagram of obtaining a second average value of a group of adjacent luminance compensation units in the method for improving display uniformity of a display screen according to the embodiment of the present application, which is further illustrated on the basis of fig. 3 to fig. 4 for reference.
The brightness compensation unit 131, the brightness compensation unit 132 and the brightness compensation unit 133 shown in fig. 6 are adjacently disposed, wherein the brightness compensation units 131, 132 and 133 respectively include 8 sub-pixels 12 disposed in two rows and four columns, and in order to further optimize the display effect of the display panel 100, after the first actual brightness compensation value is obtained for the sub-pixel 12 in each area, the second actual brightness compensation value of the sub-pixel 12 in the brightness compensation transition region adjacent to each other in the adjacent brightness compensation unit 13 is further obtained, so as to weaken the brightness difference between the adjacent brightness compensation units 13; as shown in fig. 6, if the first actual brightness compensation value is used as the final brightness compensation value and the function of improving the display effect of the three brightness compensation units 131, 132, and 133 is not achieved, for example, the brightness compensation unit 131 still has a problem of dark or bright spots in the sub-pixels 12 disposed adjacent to the brightness compensation units 132 and 133, then one sub-pixel 12 in the upper right corner of the brightness compensation unit 131 may be used as a brightness compensation transition area, one sub-pixel 12 in the upper left corner of the brightness compensation unit 132 may be used as a brightness compensation transition area, and the sub-pixels 12 included in the two adjacent brightness compensation transition areas are subjected to the calculation of the second actual brightness compensation value, where the second actual brightness compensation value is the second average value of the first average values of the two adjacent sub-pixels 12; the sub-pixel 12 at the upper left corner of the brightness compensation unit 133 and one sub-pixel 12 of the brightness compensation unit 131 are respectively used as the sub-pixels 12 included in the brightness compensation transition region, and the second actual brightness compensation value corresponding to the sub-pixels 12 is obtained as the second average value of the first average values of the two adjacent sub-pixels 12; if there is a problem of dark or bright spot in one of the sub-pixels 12 in the upper right corner of the brightness compensation unit 133, the sub-pixel 12 in the upper right corner of the brightness compensation unit 133 and one of the sub-pixels 12 of the brightness compensation unit 132 are respectively used as the sub-pixels 12 included in the brightness compensation transition region, and the second actual brightness compensation value corresponding to the sub-pixels 12 is obtained as the second average value of the first average values of the two adjacent sub-pixels 12; the luminance compensation unit 133 is close to the two sub-pixels 12 between the luminance compensation unit 131 and the luminance compensation unit 132 as the sub-pixels 12 included in one luminance compensation transition region, and further respectively combines the sub-pixel 12 at the lower right corner of the luminance compensation unit 131 (which is one luminance compensation transition region) and the sub-pixel 12 at the lower left corner of the luminance compensation unit 132 (which is one luminance compensation transition region), and the second actual luminance compensation value of the four sub-pixels 12 adjacently disposed is the second average value of the corresponding first average value.
FIG. 7 is a schematic diagram illustrating a method for calculating an actual illumination compensation value of a group of adjacent illumination compensation units shown in FIG. 6 according to an embodiment of the present disclosure; referring to fig. 7, the initial luminance compensation values calculated by the sub-pixels 12 in the luminance compensation unit 131 are respectively 2, -1, -25, -5, 26, and 6, the initial luminance compensation values calculated by the sub-pixels 12 in the luminance compensation unit 132 are respectively-5, 1, -2, 10, and the initial luminance compensation values calculated by the sub-pixels 12 in the luminance compensation unit 133 are respectively 3, -1, 5, 2, and 2; it can be seen that the three brightness compensation units 13 include the sub-pixels 12 with lower brightness and requiring higher brightness, and also include the sub-pixels 12 with higher brightness and requiring darkening; first, a first average value is obtained for the initial luminance compensation values of the sub-pixels 12 in the luminance compensation units 131, 132, and 133, respectively, to obtain a first actual luminance compensation value of 0 in the luminance compensation unit 131, a first actual luminance compensation value of-4 in the luminance compensation unit 132, and a first actual luminance compensation value of 4.5 in the luminance compensation unit 133; it can be seen that the first actual brightness compensation value of the brightness compensation unit 131 is 0, and the originally required initial brightness compensation value of the sub-pixel 12 at the upper right corner of the brightness compensation unit 131 is-25, so that the sub-pixel 12 at the upper right corner of the brightness compensation unit 131 is compensated by the first actual brightness compensation value, and then overcompensation occurs; the original required initial brightness compensation value of the sub-pixel 12 with the initial brightness compensation value 26 in the brightness compensation unit 131 is 0, so that the sub-pixel 12 is under-compensated, so that a phenomenon of large brightness difference occurs in the brightness compensation unit 131, and in order to make the brightness transition of the display frame between the adjacent brightness compensation units 131, 132, and 133 smoother, the adjacent sub-pixels 12 between the brightness compensation units 131, 132, and 133 are divided into brightness compensation transition regions in the manner shown in fig. 6, and a second average value is obtained, so that the second actual brightness compensation values of the sub-pixels 12 at the upper right corner of the brightness compensation unit 131 and the upper left corner of the brightness compensation unit 132 are both-2, the second actual brightness compensation values of the two sub-pixels 12 at the upper left corner of the brightness compensation unit 133 and the brightness compensation unit 131 are both 2.25, the second actual luminance compensation values of the two sub-pixels 12 adjacent to the luminance compensation unit 132 and the upper right corner of the luminance compensation unit 133 are both 0.25, and the second actual luminance compensation values of the two sub-pixels 12 near the middle of the luminance compensation units 131 and 132, the sub-pixel 12 at the lower right corner of the luminance compensation unit 131, and the sub-pixel 12 at the lower left corner of the luminance compensation unit 132 of the luminance compensation unit 133 are both 1.25, so that the final luminance compensation value of the sub-pixel 12 in the luminance compensation transition region adjacent to the luminance compensation unit 13 is the second actual luminance compensation value, and the final luminance compensation value of the sub-pixel 12 not adjacent to the other luminance compensation unit 13 is the first actual luminance compensation value. To a certain extent, compared with the case that the first average value is used as the actual brightness compensation value of the corresponding brightness compensation unit 13, the larger brightness difference between the brightness compensation units 13 can be weakened, and meanwhile, the phenomenon that the brightness between the adjacent brightness compensation units 13 is too high or too low is adjusted, so that the display effect of the display panel 100 is improved, and the good use experience of a user is guaranteed.
Referring to fig. 2 to fig. 4, in step 106, optionally, any luminance compensation transition region includes at least one sub-pixel 12, that is, any luminance compensation transition region may include only one sub-pixel 12, or may include a plurality of sub-pixels 12, which is not specifically limited in this application; the size of the luminance compensation transition area is adjusted and controlled according to the number/area of the sub-pixels 12 occupied by the dark area/dark spot or the bright area/bright spot in the luminance compensation unit 13, so that each luminance compensation transition area can cover the sub-pixels 12 with the dark area/dark spot or the bright area/bright spot, and preferably can also include a plurality of sub-pixels 12 with relatively normal luminance.
In step 103, optionally, the preset correspondence between the gray scale and the brightness of the sub-pixel 12 is:
and shooting a display picture of the display area 11 under a preset gray scale, and fitting to calculate the corresponding relation between the gray scale and the brightness of the sub-pixel 12.
Specifically, in step 103, a preset corresponding relationship between the gray scale and the sub-pixel 12 is needed, and the corresponding relationship is obtained by providing an image capturing device in the technical field for photographing the display area 11 of the display panel 100, using the image capturing device to photograph a display picture of the display area 11 at the preset gray scale, and directly fitting and calculating the corresponding relationship between the gray scale and the luminance of the sub-pixel 12 by using the image capturing device to provide a reference for calculating the initial luminance compensation value.
Referring to fig. 2, optionally, any brightness compensation unit 13 is located at any position in the display area 11 of the display panel 100.
Specifically, for obtaining the brightness compensation unit 13, the partition of the brightness compensation unit 13 may be performed on all the sub-pixels 12 in the display area 11 of the whole display panel 100, each of the brightness compensation units 13 obtained by partition includes different sub-pixels 12, and the present application does not specifically limit the number of the sub-pixels 12 included in any one of the brightness compensation units 13, so that any one of the brightness compensation units 13 in the present application may be located at any position in the display area 11 of the display panel 100. In the present application, the luminance compensation unit 13 may be obtained by dividing only the display area 11 in which the display unevenness still occurs after the Mura compensation, and any luminance compensation unit 13 may be located at any position in the display area 11 of the display panel 100. Therefore, a user can conveniently obtain the brightness compensation unit 13 when the brightness of the display screen is not uniform according to actual requirements, for example, when a display screen has more areas to be improved and is widely distributed, the whole display screen can be selected to be partitioned to obtain the brightness compensation unit 13, and then the final brightness compensation values corresponding to all the sub-pixels 12 in the display screen are obtained through the steps 101 to 109; for example, when only a small portion of the display screen needs to be improved, the display area 11 that needs to be improved may be partitioned to obtain a plurality of brightness compensation units 13, and the final brightness compensation values corresponding to all the sub-pixels 12 in the display screen are obtained through steps 101 to 109. It is advantageous to accelerate the luminance compensation efficiency of the display panel 100 when the range of the display area 11 that needs to be improved is small.
Referring to fig. 2, optionally, the display panel 100 further includes a non-display area 10, and the non-display area 10 surrounds the display area 11.
Specifically, the display panel 100 provided in the present application is a display panel 100 commonly known in the art, and includes a display area 11 and a non-display area 10, and the non-display area 10 is disposed to surround the display area 11. The shape of the display panel 100 is not limited in the present application, and may be a hole screen, a shaped screen, or the like. With the development of the technology, the display panel 100 without the frame area may also appear, and it should be noted that all the display panels 100 with the display area 11 are within the protection scope of the present application.
Fig. 8 is a block diagram of an apparatus for improving display uniformity of a display screen according to an embodiment of the present application, and referring to fig. 2 to 8, based on the same inventive concept, the present application further provides an apparatus for improving display uniformity of a display screen, the apparatus including:
a pixel brightness obtaining module 201, configured to obtain a first actual brightness of each sub-pixel 12 in the display area 11 of the display panel 100 at a preset gray level;
an initial brightness compensation value calculation module 202, configured to calculate, according to a preset correspondence between a gray scale and the brightness of the sub-pixel 12, an initial brightness compensation value required by each sub-pixel 12 by combining a first actual brightness of each sub-pixel 12 at the preset gray scale;
the final brightness compensation value calculating module 203 divides the display area 11 into a plurality of brightness compensation units 13, and calculates an average value of the initial brightness compensation values of all the sub-pixels 12 at a preset gray scale in each brightness compensation unit 13 to obtain a first average value, where the first average value is a first actual brightness compensation value of each sub-pixel 12 at the preset gray scale of the corresponding brightness compensation unit 13; when the absolute difference between the first average value of at least one sub-pixel 12 in any brightness compensation unit 13 at the preset gray scale and the corresponding initial brightness compensation value is greater than the preset difference, performing brightness compensation transition region division on the brightness compensation unit 13 corresponding to the sub-pixel 12, calculating a second average value of the first average values of all sub-pixels 12 in the brightness compensation transition region where the sub-pixel 12 is located and the brightness compensation transition region in the brightness compensation unit 13 adjacently arranged, where the second average value is a second actual brightness compensation value of all sub-pixels 12 in two adjacent brightness compensation transition regions, and the second brightness compensation value is a final brightness compensation value of all sub-pixels 12 in the two adjacent brightness compensation transition regions; when the absolute difference between the first average value of all the sub-pixels 12 in any one of the brightness compensation units 13 at the preset gray scale and the corresponding initial brightness compensation value is less than or equal to the preset difference, if the absolute difference between the first average value of all the sub-pixels 12 in all the brightness compensation units 13 adjacent to the preset gray scale and the corresponding initial brightness compensation value is less than or equal to the preset difference, the first actual brightness compensation value in the adjacent brightness compensation unit 13 is the final brightness compensation value of the corresponding sub-pixel 12.
Specifically, the present application further provides an apparatus for improving display unevenness of a display screen, which includes a pixel brightness obtaining module 201, an initial brightness compensation value calculating module 202, and a final brightness compensation value calculating module 203. The pixel brightness obtaining module 201 is configured to obtain a first actual brightness of each sub-pixel 12 in the display area 11 of the display panel 100 at a preset gray level.
The initial brightness compensation value calculation module 202 is configured to calculate an initial brightness compensation value required by each sub-pixel 12 according to a preset correspondence between a gray scale and the brightness of the sub-pixel 12 and by combining a first actual brightness of each sub-pixel 12 at a preset gray scale; the initial brightness compensation value here corresponds to the difference between the target brightness and the first actual brightness of the sub-pixel 12 in the display screen to be improved, and the difference here may be a positive value, a negative value or zero; when the difference is a positive value, the corresponding sub-pixel 12 has a lower brightness than the sub-pixel 12 with the preset brightness, and the sub-pixel is in a darker display state and needs to be compensated and increased in brightness; when the difference is a negative value, the corresponding sub-pixel 12 has a higher brightness than the sub-pixel 12 with the preset brightness, and the brightness needs to be weakened; when the difference is zero, the luminance of the corresponding sub-pixel 12 is the same as the preset luminance, and the luminance of the sub-pixel 12 may not need to be improved.
The final brightness compensation value calculating module 203 firstly divides the display area 11 into a plurality of brightness compensation units 13, and calculates an average value of the initial brightness compensation values of all the sub-pixels 12 at a preset gray scale in each brightness compensation unit 13 to obtain a first average value, where the first average value is a first actual brightness compensation value of each sub-pixel 12 at the preset gray scale of the corresponding brightness compensation unit 13; when the absolute difference between the first average value of at least one sub-pixel 12 in any one of the luminance compensation units 13 under the preset gray scale and the corresponding initial luminance compensation value is greater than the preset difference, the sub-pixel 12 will have a dark point/a bright point, the luminance compensation unit 13 corresponding to the sub-pixel 12 having the dark point/the bright point is subjected to luminance compensation transition region division, and then a second average value of the first average values of all the sub-pixels 12 in the luminance compensation transition region where the sub-pixel 12 is located and the luminance compensation transition region in the luminance compensation unit 13 adjacently arranged is calculated, the second average value is a second actual luminance compensation value of all the sub-pixels 12 in the two adjacently arranged luminance compensation transition regions, and the second luminance compensation value is a final luminance compensation value of all the sub-pixels 12 in the two adjacently arranged luminance compensation transition regions; when the absolute difference between the first average value of all the sub-pixels 12 in any one of the luminance compensation units 13 at the preset gray scale and the corresponding initial luminance compensation value is less than or equal to the preset difference, it indicates that the luminance of the sub-pixels 12 in the luminance compensation unit 13 is regulated and controlled by using the first average value as the first actual luminance compensation value, so that luminance abnormality is not caused; if the absolute difference values between the first average values of all the sub-pixels 12 in all the brightness compensation units 13 arranged adjacent to the sub-pixels 12 under the preset gray scale and the corresponding initial brightness compensation values are less than or equal to the preset difference value, it is indicated that none of the sub-pixels 12 in the brightness compensation units 13 arranged adjacent to the sub-pixels need to be provided with a brightness compensation transition region to improve the sub-pixels again, that is, the first actual brightness compensation value is used as the final brightness compensation value of the corresponding sub-pixel 12. The first actual brightness compensation value and the second actual brightness compensation value of each brightness compensation unit 13 are obtained through the device, and each brightness compensation unit 13 is used as a whole to perform the brightness compensation of the corresponding sub-pixel 12, so that the obvious too-dark or too-bright area in the same display screen is weakened, the display effect of the display screen is favorably improved, and better use experience is brought to a user.
Referring to fig. 2 to fig. 4, optionally, any luminance compensation transition region includes at least one sub-pixel 12, that is, any luminance compensation transition region may include only one sub-pixel 12, or may include a plurality of sub-pixels 12, which is not specifically limited in this application; the size of the luminance compensation transition area is adjusted and controlled according to the number/area of the sub-pixels 12 occupied by the dark area/dark spot or the bright area/bright spot in the luminance compensation unit 13, so that each luminance compensation transition area can cover the sub-pixels 12 with the dark area/dark spot or the bright area/bright spot, and preferably can also include a plurality of sub-pixels 12 with relatively normal luminance.
Optionally, the preset correspondence between the gray scale and the brightness of the sub-pixel 12 specifically includes:
and shooting a display picture of the display area 11 under a preset gray scale, and fitting to calculate the corresponding relation between the gray scale and the brightness of the sub-pixel 12.
Specifically, in step 103, a preset corresponding relationship between the gray scale and the sub-pixel 12 is needed, and the corresponding relationship is obtained by providing an image capturing device in the technical field for photographing the display area 11 of the display panel 100, using the image capturing device to photograph a display picture of the display area 11 at the preset gray scale, and directly fitting and calculating the corresponding relationship between the gray scale and the luminance of the sub-pixel 12 by using the image capturing device to provide a reference for calculating the initial luminance compensation value.
Referring to fig. 2 and 5, optionally, any brightness compensation unit 13 is located at any position in the display area 11 of the display panel 100.
Specifically, for obtaining the brightness compensation unit 13, the partition of the brightness compensation unit 13 may be performed on all the sub-pixels 12 in the display area 11 of the whole display panel 100, each of the brightness compensation units 13 obtained by partition includes different sub-pixels 12, and the present application does not specifically limit the number of the sub-pixels 12 included in any one of the brightness compensation units 13, so that any one of the brightness compensation units 13 in the present application may be located at any position in the display area 11 of the display panel 100. In the present application, the luminance compensation unit 13 may be obtained by dividing only the display area 11 in which the display unevenness still occurs after the Mura compensation, and any luminance compensation unit 13 may be located at any position in the display area 11 of the display panel 100. Therefore, a user can conveniently obtain the brightness compensation unit 13 when the brightness of the display screen is not uniform according to actual requirements, for example, when a display screen has more areas to be improved and is widely distributed, the whole display screen can be selected to be partitioned to obtain the brightness compensation unit 13, and then the final brightness compensation values corresponding to all the sub-pixels 12 in the display screen are obtained; for example, when only a small portion of the display screen needs to be improved, the luminance compensation unit 13 obtained by partitioning only the display area 11 that needs to be improved may be used to obtain the final luminance compensation values corresponding to all the sub-pixels 12 in the display screen. It is advantageous to accelerate the luminance compensation efficiency of the display panel 100 when the range of the display area 11 that needs to be improved is small.
Referring to fig. 2, optionally, the display panel 100 further includes a non-display area 10, and the non-display area 10 surrounds the display area 11.
Specifically, the display panel 100 provided in the present application is a display panel 100 commonly known in the art, and includes a display area 11 and a non-display area 10, and the non-display area 10 is disposed to surround the display area 11. Note that the shape of the display panel 100 is not limited in the present application, and may be a hole-digging screen, a special-shaped screen, or the like. With the development of the technology, the display panel 100 without the frame area may also appear, and it should be noted that all the display panels 100 with the display area 11 are within the protection scope of the present application.
By the embodiment, the method and the device for improving the display unevenness of the display screen, provided by the invention, at least have the following beneficial effects:
this application carries out luminance compensation with its first actual brightness compensation value through every subpixel in to display panel earlier, and then through the condition that luminance difference still appears in any subpixel in two adjacent brightness compensation transition areas between the adjacent brightness compensation unit after to the compensation with the actual brightness compensation value of second as final brightness compensation value, with this luminance difference on the weakening display panel, still appear after the compensation of display panel Mura regional the display screen that shows the inequality and carry out the improvement of luminance homogenization, improve the display effect of display screen, be favorable to promoting user's use and experience.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (12)

1. A method for improving display unevenness of a display screen is characterized by comprising the following steps:
the display panel comprises a display area, wherein the display area comprises a plurality of sub-pixels arranged in an array;
acquiring first actual brightness of each sub-pixel in the display panel under a preset gray scale;
calculating an initial brightness compensation value required by each sub-pixel according to a corresponding relation between a preset gray scale and the brightness of the sub-pixel and by combining the first actual brightness of each sub-pixel under the preset gray scale;
partitioning the display area to obtain a plurality of brightness compensation units, wherein any brightness compensation unit comprises at least one sub-pixel;
averaging the initial brightness compensation values of all the sub-pixels under a preset gray scale in each brightness compensation unit to obtain a first average value, wherein the first average value is a first actual brightness compensation value of each sub-pixel under the preset gray scale of the corresponding brightness compensation unit;
when the absolute difference value between the first average value of at least one sub-pixel in any one of the brightness compensation units under a preset gray scale and the corresponding initial brightness compensation value is greater than a preset difference value, dividing a brightness compensation transition region of the brightness compensation unit corresponding to the sub-pixel, wherein the brightness compensation transition region is positioned on one side of the brightness compensation unit close to another brightness compensation unit adjacent to the brightness compensation unit;
and calculating a second average value of the first average values of all the sub-pixels in the brightness compensation transition area of the sub-pixel and the brightness compensation transition area in the brightness compensation transition area of the adjacent brightness compensation unit, wherein the second average value is a second actual brightness compensation value of all the sub-pixels in two adjacent brightness compensation transition areas which are corresponding to the adjacent brightness compensation unit under a preset gray scale.
2. The method according to claim 1, wherein when an absolute difference between the first average value of all the sub-pixels in any one of the luminance compensation units at a predetermined gray level and the corresponding initial luminance compensation value is less than or equal to the predetermined difference;
and if the absolute difference values between the first average values and the corresponding initial brightness compensation values of all the sub-pixels in all the brightness compensation units which are adjacently arranged are less than or equal to the preset difference value, the first actual brightness compensation value in the adjacent brightness compensation unit is the final brightness compensation value of the corresponding sub-pixel.
3. The method according to claim 1, wherein when an absolute difference between the first average value at a predetermined gray level and the corresponding initial brightness compensation value in at least one of the adjacent brightness compensation units is greater than a predetermined difference, the second actual brightness compensation value is a final brightness compensation value of all the sub-pixels in two adjacent brightness compensation transition regions of the adjacent brightness compensation units.
4. The method as claimed in claim 1, wherein at least one of the sub-pixels is included in any one of the luminance compensation transition regions.
5. The method as claimed in claim 1, wherein the preset correspondence between the gray scale and the brightness of the sub-pixels is:
and shooting a display picture of the display area under a preset gray scale, and fitting and calculating the corresponding relation between the gray scale and the sub-pixel brightness.
6. The method as claimed in claim 1, wherein any one of the brightness compensation units is located at any position in the display area of the display panel.
7. The method as claimed in claim 1, wherein the display panel further comprises a non-display area surrounding the display area.
8. An apparatus for improving display uniformity of a display screen, the apparatus comprising:
the pixel brightness acquisition module is used for acquiring first actual brightness of each sub-pixel in a display area of the display panel under a preset gray scale;
the initial brightness compensation value calculating module is used for calculating an initial brightness compensation value required by each sub-pixel according to the preset corresponding relation between the gray scale and the sub-pixel brightness and by combining the first actual brightness of each sub-pixel under the preset gray scale;
the final brightness compensation value calculating module is used for dividing the display area into a plurality of brightness compensation units, and averaging the initial brightness compensation values of all the sub-pixels under a preset gray scale in each brightness compensation unit to obtain a first average value, wherein the first average value is a first actual brightness compensation value of each sub-pixel under the preset gray scale of the corresponding brightness compensation unit; when the absolute difference value between the first average value of at least one sub-pixel in any one of the brightness compensation units under a preset gray scale and the corresponding initial brightness compensation value is greater than a preset difference value, performing brightness compensation transition region division on the brightness compensation unit corresponding to the sub-pixel, and calculating a second average value of the first average values of all the sub-pixels in the brightness compensation transition region of the sub-pixel and the brightness compensation transition region in the brightness compensation unit which is adjacently arranged, wherein the second average value is a second actual brightness compensation value of all the sub-pixels in two adjacent brightness compensation transition regions, and the second brightness compensation value is a final brightness compensation value of all the sub-pixels in the two adjacent brightness compensation transition regions; when the absolute difference between the first average value of all the sub-pixels in any one of the brightness compensation units at a preset gray scale and the corresponding initial brightness compensation value is less than or equal to the preset difference, if the absolute difference between the first average value of all the sub-pixels in all the brightness compensation units adjacent to the brightness compensation unit at the preset gray scale and the corresponding initial brightness compensation value is less than or equal to the preset difference, the first actual brightness compensation value in the adjacent brightness compensation unit is the final brightness compensation value of the corresponding sub-pixel.
9. The apparatus of claim 8, wherein at least one of the sub-pixels is included in any of the luminance compensation transition regions.
10. The apparatus as claimed in claim 8, wherein the preset correspondence between the gray scale and the brightness of the sub-pixels is:
and shooting a display picture of the display area under a preset gray scale, and fitting and calculating the corresponding relation between the gray scale and the sub-pixel brightness.
11. The apparatus as claimed in claim 8, wherein any one of the brightness compensation units is located at any position in the display area of the display panel.
12. The apparatus as claimed in claim 8, wherein the display panel further comprises a non-display area surrounding the display area.
CN201911357102.8A 2019-12-25 2019-12-25 Method and device for improving display unevenness of display screen Active CN111009207B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911357102.8A CN111009207B (en) 2019-12-25 2019-12-25 Method and device for improving display unevenness of display screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911357102.8A CN111009207B (en) 2019-12-25 2019-12-25 Method and device for improving display unevenness of display screen

Publications (2)

Publication Number Publication Date
CN111009207A true CN111009207A (en) 2020-04-14
CN111009207B CN111009207B (en) 2022-07-01

Family

ID=70118561

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911357102.8A Active CN111009207B (en) 2019-12-25 2019-12-25 Method and device for improving display unevenness of display screen

Country Status (1)

Country Link
CN (1) CN111009207B (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111710277A (en) * 2020-06-28 2020-09-25 合肥维信诺科技有限公司 Compensation method and device of display panel
CN112542137A (en) * 2020-12-15 2021-03-23 Oppo广东移动通信有限公司 Brightness compensation method, chip, device, equipment and storage medium
CN112614468A (en) * 2020-12-23 2021-04-06 天马微电子股份有限公司 Brightness compensation method and system of display panel
CN113012615A (en) * 2020-09-09 2021-06-22 重庆康佳光电技术研究院有限公司 Display screen compensation method and device, computer readable storage medium and electronic equipment
CN114035757A (en) * 2021-03-09 2022-02-11 重庆康佳光电技术研究院有限公司 Dead pixel compensation method and device, computer readable storage medium and electronic equipment
CN114495812A (en) * 2022-01-11 2022-05-13 惠州视维新技术有限公司 Display panel brightness compensation method and device, electronic equipment and readable storage medium
CN114822397A (en) * 2022-05-17 2022-07-29 昆山国显光电有限公司 Data processing method and device and display panel compensation method and device
CN114898706A (en) * 2022-05-18 2022-08-12 昆山国显光电有限公司 Brightness compensation method and device of display screen and computer equipment
CN114898714A (en) * 2022-06-14 2022-08-12 昆山国显光电有限公司 Brightness compensation method, apparatus, device and medium
WO2022222176A1 (en) * 2021-04-23 2022-10-27 武汉华星光电半导体显示技术有限公司 Display apparatus and driving method therefor, and electronic device
WO2022252555A1 (en) * 2021-05-31 2022-12-08 昆山工研院新型平板显示技术中心有限公司 Grayscale compensation method and apparatus for display panel
CN115457905A (en) * 2022-10-21 2022-12-09 深圳市升宏光电科技有限公司 Adaptive dimming compensation method, device and system of LED display screen and electronic equipment
US11699381B2 (en) 2021-04-23 2023-07-11 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Display device, driving method thereof, and electronic device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105047145A (en) * 2015-09-14 2015-11-11 青岛海信电器股份有限公司 Backlight brightness control method, backlight brightness control device and display terminal
CN105741763A (en) * 2016-03-31 2016-07-06 深圳市华星光电技术有限公司 Method for eliminating Mura of OLED display panel
US20170018231A1 (en) * 2015-12-09 2017-01-19 Hisense Electric Co., Ltd. Image processing method and liquid crystal display device
CN106531050A (en) * 2016-12-27 2017-03-22 上海天马有机发光显示技术有限公司 Method, device and system for gray scale compensation of display panel
CN106782307A (en) * 2017-01-25 2017-05-31 上海天马有机发光显示技术有限公司 The gray level compensation method and gray scale compensation system of a kind of OLED display panel
CN107731194A (en) * 2017-11-21 2018-02-23 深圳市华星光电半导体显示技术有限公司 A kind of mura compensation methodes and device
CN108231013A (en) * 2015-12-09 2018-06-29 青岛海信电器股份有限公司 A kind of image processing method and liquid crystal display
CN109147685A (en) * 2018-07-30 2019-01-04 深圳市华星光电半导体显示技术有限公司 Mura compensation method
CN109256096A (en) * 2018-11-14 2019-01-22 成都中电熊猫显示科技有限公司 display brightness compensation method, device and equipment
CN110264977A (en) * 2019-06-25 2019-09-20 惠科股份有限公司 Display brightness adjustment method and device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105047145A (en) * 2015-09-14 2015-11-11 青岛海信电器股份有限公司 Backlight brightness control method, backlight brightness control device and display terminal
US20170018231A1 (en) * 2015-12-09 2017-01-19 Hisense Electric Co., Ltd. Image processing method and liquid crystal display device
CN108231013A (en) * 2015-12-09 2018-06-29 青岛海信电器股份有限公司 A kind of image processing method and liquid crystal display
CN105741763A (en) * 2016-03-31 2016-07-06 深圳市华星光电技术有限公司 Method for eliminating Mura of OLED display panel
CN106531050A (en) * 2016-12-27 2017-03-22 上海天马有机发光显示技术有限公司 Method, device and system for gray scale compensation of display panel
CN106782307A (en) * 2017-01-25 2017-05-31 上海天马有机发光显示技术有限公司 The gray level compensation method and gray scale compensation system of a kind of OLED display panel
CN107731194A (en) * 2017-11-21 2018-02-23 深圳市华星光电半导体显示技术有限公司 A kind of mura compensation methodes and device
CN109147685A (en) * 2018-07-30 2019-01-04 深圳市华星光电半导体显示技术有限公司 Mura compensation method
CN109256096A (en) * 2018-11-14 2019-01-22 成都中电熊猫显示科技有限公司 display brightness compensation method, device and equipment
CN110264977A (en) * 2019-06-25 2019-09-20 惠科股份有限公司 Display brightness adjustment method and device

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111710277A (en) * 2020-06-28 2020-09-25 合肥维信诺科技有限公司 Compensation method and device of display panel
CN113012615A (en) * 2020-09-09 2021-06-22 重庆康佳光电技术研究院有限公司 Display screen compensation method and device, computer readable storage medium and electronic equipment
CN112542137A (en) * 2020-12-15 2021-03-23 Oppo广东移动通信有限公司 Brightness compensation method, chip, device, equipment and storage medium
CN112542137B (en) * 2020-12-15 2022-05-24 Oppo广东移动通信有限公司 Brightness compensation method, chip, device, equipment and storage medium
CN112614468A (en) * 2020-12-23 2021-04-06 天马微电子股份有限公司 Brightness compensation method and system of display panel
CN112614468B (en) * 2020-12-23 2022-05-24 天马微电子股份有限公司 Brightness compensation method and system of display panel
CN114035757A (en) * 2021-03-09 2022-02-11 重庆康佳光电技术研究院有限公司 Dead pixel compensation method and device, computer readable storage medium and electronic equipment
CN114035757B (en) * 2021-03-09 2023-08-29 重庆康佳光电科技有限公司 Method and device for compensating dead pixel, computer readable storage medium and electronic equipment
WO2022222176A1 (en) * 2021-04-23 2022-10-27 武汉华星光电半导体显示技术有限公司 Display apparatus and driving method therefor, and electronic device
US11699381B2 (en) 2021-04-23 2023-07-11 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Display device, driving method thereof, and electronic device
WO2022252555A1 (en) * 2021-05-31 2022-12-08 昆山工研院新型平板显示技术中心有限公司 Grayscale compensation method and apparatus for display panel
CN114495812A (en) * 2022-01-11 2022-05-13 惠州视维新技术有限公司 Display panel brightness compensation method and device, electronic equipment and readable storage medium
CN114822397A (en) * 2022-05-17 2022-07-29 昆山国显光电有限公司 Data processing method and device and display panel compensation method and device
CN114822397B (en) * 2022-05-17 2023-11-17 昆山国显光电有限公司 Data processing method and device, display panel compensation method and device
CN114898706A (en) * 2022-05-18 2022-08-12 昆山国显光电有限公司 Brightness compensation method and device of display screen and computer equipment
CN114898706B (en) * 2022-05-18 2023-10-31 昆山国显光电有限公司 Display screen brightness compensation method and device and computer equipment
CN114898714A (en) * 2022-06-14 2022-08-12 昆山国显光电有限公司 Brightness compensation method, apparatus, device and medium
WO2023240838A1 (en) * 2022-06-14 2023-12-21 昆山国显光电有限公司 Brightness compensation method and apparatus, and device and medium
CN115457905A (en) * 2022-10-21 2022-12-09 深圳市升宏光电科技有限公司 Adaptive dimming compensation method, device and system of LED display screen and electronic equipment

Also Published As

Publication number Publication date
CN111009207B (en) 2022-07-01

Similar Documents

Publication Publication Date Title
CN111009207B (en) Method and device for improving display unevenness of display screen
US10825400B2 (en) Mura compensation method for display panel and display panel
US11335285B2 (en) Circuit and method for adjusting display brightness level to display image with an improved homogenization effect
US11069286B2 (en) Color compensation method, compensation device, and display device
US9165526B2 (en) Subpixel arrangements of displays and method for rendering the same
CN106782306B (en) A kind of brightness adjusting method and brightness control system of OLED display panel
US9805667B2 (en) Brightness compensation method of mura area and design method of mura pixel dot brightness
USRE45332E1 (en) Compensation device for non-uniform regions in flat panel display and method thereof
JP5300866B2 (en) Liquid crystal display
US7209105B2 (en) System and method for compensating for visual effects upon panels having fixed pattern noise with reduced quantization error
US8576262B2 (en) Liquid crystal display apparatus
KR102069019B1 (en) Gradation adjustment method and device
CN108877631B (en) Mura compensation method and device for display screen, computer equipment and storage medium
US20160335944A1 (en) Liquid crystal panel and driving method thereof
US20170098419A1 (en) LCD Panel and Driving Method Thereof
KR20190141779A (en) Display method of mura phenomenon compensation and display panel
JP2008310329A (en) Video display device capable of compensating for display defect
KR20190009022A (en) Display apparatus and method of driving the same
US20240046835A1 (en) Display device brightness compensation look-up table manufacturing method, device thereof, and display device
JP2018530776A5 (en)
CN109686336B (en) Display device and display control method and device thereof
KR20150078299A (en) Display device and driving method thereof
CN114898706A (en) Brightness compensation method and device of display screen and computer equipment
US20200319519A1 (en) Liquid crystal display panel
CN117496884A (en) Brightness adjusting method of display device and display device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant