CN113903306B - Compensation method and compensation device of display panel - Google Patents
Compensation method and compensation device of display panel Download PDFInfo
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- CN113903306B CN113903306B CN202111191350.7A CN202111191350A CN113903306B CN 113903306 B CN113903306 B CN 113903306B CN 202111191350 A CN202111191350 A CN 202111191350A CN 113903306 B CN113903306 B CN 113903306B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The embodiment of the invention provides a compensation method and a compensation device of a display panel, wherein the compensation method comprises the following steps: simultaneously acquiring first display data of a first display area and second display data of a second display area when a standard display panel displays a set gray scale through image acquisition equipment; the surface of a first display area of the standard display panel is covered with a brightness adjusting sheet, and the first display data is display data of light rays emitted by the first display area after being adjusted by the brightness adjusting sheet; simultaneously acquiring third display data of a first display area and fourth display data of a second display area when a display panel to be compensated displays a set gray scale through image acquisition equipment; the surface of the first display area of the display panel to be compensated is covered with a brightness adjusting sheet, and the third display data is display data obtained by adjusting light rays emitted by the first display area through the brightness adjusting sheet. The compensation method and the compensation device for the display panel provided by the embodiment of the invention can make the brightness of the compensated display panel uniform.
Description
Technical Field
The present invention relates to the field of display, and in particular, to a compensation method and a compensation apparatus for a display panel.
Background
An Organic Light Emitting Diode (OLED) display panel is a self-luminous display panel, and the OLED display panel is increasingly applied to various high-performance display fields due to its advantages of lightness, thinness, high brightness, wide viewing angle, high response speed, and wide temperature range.
However, the conventional OLED display panel is prone to display non-uniformity.
Disclosure of Invention
The compensation method and the compensation device for the display panel provided by the embodiment of the invention can make the brightness of the compensated display panel uniform.
In a first aspect, an embodiment of the present invention provides a compensation method for a display panel, where the display panel includes a first display area and a second display area, the method includes:
simultaneously acquiring first display data of the first display area and second display data of the second display area when a standard display panel displays a set gray scale; the surface of the first display area of the standard display panel is covered with a brightness adjusting sheet, and the first display data are display data obtained by adjusting light rays emitted by the first display area through the brightness adjusting sheet;
simultaneously acquiring third display data of the first display area and fourth display data of the second display area when a display panel to be compensated displays a set gray scale; the surface of the first display area of the display panel to be compensated is covered with the brightness adjusting sheet, and the third display data is display data of light rays emitted by the first display area after being adjusted by the brightness adjusting sheet;
and determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data, and compensating the display panel to be compensated.
Optionally, the first display data includes a first display brightness of the first color sub-pixel, a second display brightness of the second color sub-pixel, and a third display brightness of the third color sub-pixel; the second display data comprises a fourth display brightness of the first color sub-pixel, a fifth display brightness of the second color sub-pixel and a sixth display brightness of the third color sub-pixel;
determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data, wherein the compensation of the display panel to be compensated comprises the following steps:
determining a standard brightness ratio of the first display area and the second display area according to a first ratio of the first display brightness to the fourth display brightness, a second ratio of the second display brightness to the fifth display brightness, and a third ratio of the third display brightness to the sixth display brightness;
and determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data, and compensating the display panel to be compensated.
Optionally, the first display brightness is a display brightness average value of a first color sub-pixel of the first display area, the second display brightness is a display brightness average value of a second color sub-pixel of the first display area, and the third display brightness is a display brightness average value of a third color sub-pixel of the first display area;
the fourth display brightness is the display brightness average value of the first color sub-pixels of the second display area, the fifth display brightness is the display brightness average value of the second color sub-pixels of the second display area, and the sixth display brightness is the display brightness average value of the third color sub-pixels of the second display area.
Optionally, the obtaining of the first display data of the first display area and the second display data of the second display area when the standard display panel displays the set gray scale simultaneously includes:
simultaneously shooting a first display image when the standard display panel displays a set gray scale;
determining the display brightness of each sub-pixel of the first display area of the standard display panel and the display brightness of each sub-pixel of the second display area of the standard display panel according to the first display image;
determining the first display data according to the display brightness of each sub-pixel of the first display area of the standard display panel, and determining the second display data according to the display brightness of each sub-pixel of the second display area of the standard display panel;
and simultaneously acquiring third display data of the first display area and fourth display data of the second display area when the display panel to be compensated displays the set gray scale, wherein the method comprises the following steps:
simultaneously shooting a second display image when the display panel to be compensated displays a set gray scale;
determining the display brightness of each sub-pixel of the first display area of the display panel to be compensated and the display brightness of each sub-pixel of the second display area of the display panel to be compensated according to the second display image;
and determining the third display data according to the display brightness of each sub-pixel of the first display area of the display panel to be compensated, and determining the fourth display data according to the display brightness of each sub-pixel of the second display area of the display panel to be compensated.
Optionally, the method further includes:
obtaining the display brightness of each sub-pixel of the second display area of the display panel to be compensated after the brightness adjusting sheet is removed;
and determining a compensation value of each sub-pixel according to the display brightness of each sub-pixel and the target display brightness.
Optionally, the first display area is a transparent display area, and the second display area is a main display area;
when the same gray scale is displayed, the luminous brightness of the sub-pixels of the first display area is greater than that of the sub-pixels of the same color of the second display area;
the brightness adjusting sheet is a brightness attenuation sheet.
Optionally, the third display data includes a seventh display luminance of the first color sub-pixel, an eighth display luminance of the second color sub-pixel, and a ninth display luminance of the third color sub-pixel; the fourth display data comprises a tenth display brightness of the first color sub-pixel, an eleventh display brightness of the second color sub-pixel and a twelfth display brightness of the third color sub-pixel;
determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data, wherein the compensation of the display panel to be compensated specifically comprises: determining target brightness of each sub-pixel of a first display area of a display panel to be compensated according to the first ratio, the second ratio, the third ratio, the tenth display brightness, the eleventh display brightness and the twelfth display brightness, wherein the target brightness of the first color sub-pixel is a product of the first ratio and the tenth display brightness, the target brightness of the second color sub-pixel is a product of the second ratio and the eleventh display brightness, and the target brightness of the third color sub-pixel is a product of the third ratio and the twelfth display brightness;
determining a compensation value of the first color sub-pixel according to the target brightness of the first color sub-pixel and the seventh display brightness, determining a compensation value of the second color sub-pixel according to the target brightness of the second color sub-pixel and the eighth display brightness, and determining a compensation value of the first color sub-pixel according to the target brightness of the third color sub-pixel and the ninth display brightness.
In a second aspect, an embodiment of the present invention further provides a compensation apparatus for a display panel, where the display panel includes a first display area and a second display area, the compensation apparatus includes: the system comprises an image acquisition module and a data processing module;
the image acquisition module is connected with the data processing module;
the image acquisition module is used for simultaneously acquiring first display data of the first display area and second display data of the second display area when a standard display panel displays a set gray scale; the surface of the first display area of the standard display panel is covered with a brightness adjusting sheet, and the first display data is display data of light rays emitted by the first display area after being adjusted by the brightness adjusting sheet;
the image acquisition module is used for simultaneously acquiring third display data of the first display area and fourth display data of the second display area when a display panel to be compensated displays a set gray scale; the surface of the first display area of the display panel to be compensated is covered with the brightness adjusting sheet, and the third display data is display data of light rays emitted by the first display area after being adjusted by the brightness adjusting sheet;
the data processing module is used for determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data, and compensating the display panel to be compensated.
Optionally, the first display data includes a first display luminance of the first color sub-pixel, a second display luminance of the second color sub-pixel, and a third display luminance of the third color sub-pixel; the second display data comprises a fourth display brightness of the first color sub-pixel, a fifth display brightness of the second color sub-pixel and a sixth display brightness of the third color sub-pixel;
the data processing module comprises a first processing unit and a second processing unit:
the first processing unit is used for determining a standard brightness ratio of the first display area and the second display area according to a first ratio of the first display brightness to the fourth display brightness, a second ratio of the second display brightness to the fifth display brightness, and a third ratio of the third display brightness to the sixth display brightness;
the second processing unit is used for determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data, and compensating the display panel to be compensated.
Optionally, the first display brightness is a display brightness average value of a first color sub-pixel of the first display area, the second display brightness is a display brightness average value of a second color sub-pixel of the first display area, and the third display brightness is a display brightness average value of a third color sub-pixel of the first display area;
the fourth display brightness is the display brightness average value of the first color sub-pixels of the second display area, the fifth display brightness is the display brightness average value of the second color sub-pixels of the second display area, and the sixth display brightness is the display brightness average value of the third color sub-pixels of the second display area.
Optionally, the image obtaining module includes a first image capturing unit, a first brightness determining unit, a first data determining unit, a second image capturing unit, a second brightness determining unit, and a second data determining unit;
the first image shooting unit is used for shooting a first display image when the standard display panel displays a set gray scale;
the first brightness determining unit is used for determining the display brightness of each sub-pixel of the first display area of the standard display panel and the display brightness of each sub-pixel of the second display area of the standard display panel according to the first display image;
the first data determining unit is used for determining the first display data according to the display brightness of each sub-pixel of the first display area of the standard display panel and is also used for determining the second display data according to the display brightness of each sub-pixel of the second display area of the standard display panel;
the second image shooting unit is used for simultaneously shooting a second display image when the display panel to be compensated displays a set gray scale;
the second brightness determining unit is used for determining the display brightness of each sub-pixel of the first display area of the display panel to be compensated and the display brightness of each sub-pixel of the second display area of the display panel to be compensated according to the second display image;
the second data determining unit is configured to determine the third display data according to the display brightness of each sub-pixel in the first display area of the display panel to be compensated, and is further configured to determine the fourth display data according to the display brightness of each sub-pixel in the second display area of the display panel to be compensated.
The embodiment of the invention provides a compensation method of a display panel, wherein after a brightness adjusting sheet covers a first display area in a standard display panel, the display brightness of light emitted by sub-pixels of the first display area of the standard display panel after being adjusted by a brightness adjusting surface is close to the display brightness of sub-pixels of a second display area, first display data of the first display area in the standard display panel and second display data of the second display area can be simultaneously obtained through one-time exposure, after the same brightness adjusting sheet covers the first display area in the display panel to be compensated, the display brightness of light emitted by sub-pixels of the first display area of the display panel to be compensated after being adjusted by the brightness adjusting sheet is close to the display brightness of sub-pixels of the second display area, third display data of the first display area in the display panel to be compensated and fourth display data of the second display area can be simultaneously obtained through one-time exposure, and compensation data in the display panel to be compensated are determined according to the obtained first display data, second display data, third display data and fourth display data. The first display data and the second display data in the standard display panel can be simultaneously acquired only by exposure once, the first display data and the second display data in the standard display panel do not need to be respectively acquired by exposure twice, exposure errors caused by different camera exposure parameters of the first display data and the second display data are avoided, the third display data and the fourth display data in the display panel to be compensated can be simultaneously acquired only by exposure once, the third display data and the fourth display data in the display panel to be compensated do not need to be respectively acquired by exposure twice, exposure errors caused by different camera exposure parameters of the third display data and the fourth display data are avoided, and therefore the first display data, the second display data, the third display data and the fourth display data are more accurate, and the compensation data of the display panel to be compensated are determined according to the first display data and the second display data in the standard display panel, so that the brightness relation of the first display area and the second display area of the compensated display panel is close to the brightness requirement of the first display area and the second display area of the standard display panel.
Drawings
Fig. 1 is a schematic flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a compensation apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the invention and do not delimit the embodiments. It should be further noted that, for convenience of description, only some structures related to the embodiments of the present invention are shown in the drawings, not all of them.
With the wide development and deep application of OLED display panel technology, the pursuit of high-screen-ratio (even full-screen) display panels with better visual experience has become one of the trends of current display technology development. The high screen ratio display panel may have a Mura phenomenon in the display process, which reduces the display effect of the display panel. The conventional high-screen-ratio Display panel generally includes an UDC (Under Display Camera) Display area and a main Display area, where the UDC Display area is a screen in the screen, and is generally a Camera area of the Display panel, the Camera area is a Display area with low PPI, the lower PPI Display area has higher light transmittance to facilitate photographing, the main Display area is a Display area of the Display panel except the UDC Display area, and the PPI of the main Display area is generally higher than the PPI of the UDC Display area. In order to realize normal display, the average brightness of the UDC display area and the main screen display area is generally required to be the same, but the PPI of the UDC display area is lower than that of the main display area, so that the luminance of the sub-pixels in the UDC display area is higher than that of the sub-pixels in the main display area, for example, when the UDC display area is 200PPI and the main screen area is 400PPI, the luminance of the sub-pixels in the UDC display area is about 4 times that of the sub-pixels in the main display area. Because the luminance of sub-pixels in the UDC display area and the main display area has larger difference, optical data of the UDC display area and optical data of the main display area are acquired by exposing for two times through a camera in the existing compensation method, and Demura compensation is separately performed.
In order to make the display of the display panel uniform after compensation, embodiments of the present invention provide a compensation method and a compensation apparatus for a display panel.
Fig. 1 is a schematic flowchart of a compensation method for a display panel according to an embodiment of the present invention, and referring to fig. 1, the method includes the following steps:
s110, simultaneously acquiring first display data of a first display area and second display data of a second display area when the standard display panel displays a set gray scale; the surface of the first display area of the standard display panel is covered with a brightness adjusting sheet, and the first display data are display data obtained by adjusting light rays emitted by the first display area through the brightness adjusting sheet.
Specifically, the brightness adjusting sheet is configured to adjust brightness of the first display area entering the image acquisition device, so that a difference between display brightness of light emitted by the sub-pixels of the first display area after passing through the brightness adjusting sheet and display brightness of the sub-pixels of the second display area is within a preset range, specifically, may be ± 10%. Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention, referring to fig. 2 and fig. 3, the display panel includes a first display region 210 and a second display region 220, an area of a brightness adjusting sheet 230 is slightly larger than an area of the first display region 210, and the brightness adjusting sheet 230 completely covers the first display region 210. The first display data may include luminance data for each sub-pixel of a first display region of a standard display panel, and the second display data may include luminance data for each sub-pixel of a second display region of the standard display panel.
In the embodiment, the display brightness of the first display area is adjusted to be close to that of the second display area through the brightness adjusting sheet, then the first display area and the second display area in the standard display panel are shot in the same picture through the image acquisition equipment, and as the display brightness of the sub-pixels in the first display area is closer to that of the sub-pixels in the second display area, the first display data and the second display data in the standard display panel can be acquired simultaneously only by exposure once without respectively acquiring the first display data and the second display data in the standard display panel by exposure twice, so that exposure errors caused by different exposure parameters of the camera in the first display data and the second display data are avoided. The standard display panel is a display panel meeting the requirement of display uniformity, that is, the display panel has a standard range of brightness difference between sub-pixels of the same color in the first display area and the second display area when the sub-pixels display the same gray scale.
S120, simultaneously acquiring third display data of the first display area and fourth display data of the second display area when the display panel to be compensated displays the set gray scale; the surface of the first display area of the display panel to be compensated is covered with a brightness adjusting sheet, and the third display data is the display data of the light emitted by the first display area after being adjusted by the brightness adjusting sheet.
Specifically, the third display data may include luminance data of each sub-pixel in the first display area of the display panel to be compensated, and the fourth display data may include luminance data of each sub-pixel in the second display area of the display panel to be compensated. The display panel to be compensated represents a display panel that needs to be subjected to luminance compensation. The method comprises the steps of covering a brightness adjusting sheet in a first display area of a display panel to be compensated, shooting the first display area and a second display area of the display panel to be compensated in the same picture by using image acquisition equipment, recording the picture as a second picture, and then acquiring third display data in the first display area and fourth display data in the second display area in the second picture.
S130, determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data, and compensating the display panel to be compensated.
Specifically, the compensation data may be compensation data of a first display area in the display panel to be compensated, or compensation data of a second display area in the display panel to be compensated. The compensation criterion of the display panel to be compensated may be determined according to the first display data and the second display data of the standard display panel. The first average display brightness of each sub-pixel with the same color in the first display area of the standard display panel can be determined according to the first display data, and the second average display brightness of each sub-pixel with the same color in the second display area of the standard display panel can be determined according to the second display data. Determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data, and the fourth display data may include: and determining the compensation value of each sub-pixel according to the fourth display brightness and the target display brightness. Determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data may further include: and determining the standard brightness ratio of the first display area and the second display area according to the ratio of the first average display brightness and the second average display brightness of the same-color sub-pixels, and determining the compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data.
The embodiment of the invention provides a compensation method of a display panel, wherein after a brightness adjusting sheet covers a first display area in a standard display panel, the display brightness of light emitted by sub-pixels of the first display area of the standard display panel after being adjusted by a brightness adjusting surface is close to the display brightness of sub-pixels of a second display area, first display data of the first display area in the standard display panel and second display data of the second display area can be simultaneously obtained through one-time exposure, after the same brightness adjusting sheet covers the first display area in the display panel to be compensated, the display brightness of light emitted by sub-pixels of the first display area of the display panel to be compensated after being adjusted by the brightness adjusting sheet is close to the display brightness of sub-pixels of the second display area, third display data of the first display area in the display panel to be compensated and fourth display data of the second display area can be simultaneously obtained through one-time exposure, and compensation data in the display panel to be compensated are determined according to the obtained first display data, second display data, third display data and fourth display data. The first display data and the second display data in the standard display panel can be simultaneously acquired only by exposure once, the first display data and the second display data in the standard display panel do not need to be respectively acquired by exposure twice, exposure errors caused by different camera exposure parameters of the first display data and the second display data are avoided, the third display data and the fourth display data in the display panel to be compensated can be simultaneously acquired only by exposure once, the third display data and the fourth display data in the display panel to be compensated do not need to be respectively acquired by exposure twice, exposure errors caused by different camera exposure parameters of the third display data and the fourth display data are avoided, and therefore the first display data, the second display data, the third display data and the fourth display data are more accurate, and the compensation data of the display panel to be compensated are determined according to the first display data and the second display data in the standard display panel, so that the brightness relation of the first display area and the second display area of the compensated display panel is close to the brightness requirement of the first display area and the second display area of the standard display panel.
In addition, the standard display panel can also be a display panel with both chromaticity and display uniformity meeting requirements, and the display compensation data of the display panel to be compensated is determined according to the standard display panel, so that the display chromaticity of the display panel to be compensated is consistent with that of the standard display panel, and the display chromaticity of the display panel to be compensated meets the requirements.
Optionally, the first display data includes a first display brightness of the first color sub-pixel, a second display brightness of the second color sub-pixel, and a third display brightness of the third color sub-pixel; the second display data comprises a fourth display brightness of the first color sub-pixel, a fifth display brightness of the second color sub-pixel and a sixth display brightness of the third color sub-pixel; determining compensation data of a display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data, wherein the compensation of the display panel to be compensated comprises the following steps: determining the standard brightness ratio of the first display area and the second display area according to a first ratio of the first display brightness to the fourth display brightness, a second ratio of the second display brightness to the fifth display brightness, and a third ratio of the third display brightness to the sixth display brightness; and determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data, and compensating the display panel to be compensated.
Specifically, the first display brightness may be an average display brightness of the first color sub-pixel in the first display area of the standard display panel, or an average display brightness of the first color sub-pixel in the set area in the first display area, for example, the display brightness of the first color sub-pixel at the center position of the first display area. The second display brightness may be an average display brightness of the second color sub-pixels in the first display area of the standard display panel, or an average display brightness of the second color sub-pixels in the set area in the first display area, for example, the display brightness of the second color sub-pixels at the center position of the first display area. The third display brightness may be an average display brightness of the third color sub-pixels in the first display area of the standard display panel, or an average display brightness of the third color sub-pixels in the setting area in the first display area, for example, the display brightness of the third color sub-pixels at the center position of the first display area. The fourth display luminance may be an average display luminance of the first color sub-pixels in the second display region of the standard display panel, or an average display luminance of the first color sub-pixels in the setting region in the second display region, for example, the display luminance of the first color sub-pixels at the center position of the second display region. The fifth display luminance may be an average display luminance of the second color sub-pixels in the second display region of the standard display panel, or an average display luminance of the second color sub-pixels in the setting region in the second display region, for example, the fifth display luminance may be a display luminance of the second color sub-pixels at a center position of the second display region. The sixth display luminance may be an average display luminance of the third color sub-pixels in the second display region of the standard display panel, or an average display luminance of the third color sub-pixels in the setting region in the second display region, for example, the display luminance of the third color sub-pixels at the center position of the second display region. The first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are sub-pixels of different emission colors, and illustratively, the first color sub-pixel may be a sub-pixel emitting red light, the second color sub-pixel may be a sub-pixel emitting green light, and the third color sub-pixel may be a sub-pixel emitting blue light.
And determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data, so that the brightness ratio of the sub-pixels of the first display area and the second display area of the display panel to be compensated after compensation is the same as the brightness ratio of the sub-pixels of the first display area and the second display area of the standard display panel, and the display brightness of the first display area and the second display area of the display panel to be compensated after compensation meets the requirement of uniformity.
Optionally, the first display brightness is a display brightness average value of a first color sub-pixel of the first display area, the second display brightness is a display brightness average value of a second color sub-pixel of the first display area, and the third display brightness is a display brightness average value of a third color sub-pixel of the first display area; the fourth display brightness is the display brightness average value of the first color sub-pixels of the second display area, the fifth display brightness is the display brightness average value of the second color sub-pixels of the second display area, and the sixth display brightness is the display brightness average value of the third color sub-pixels of the second display area.
Specifically, because the display brightness of the sub-pixels has certain difference, the first ratio, the second ratio and the third ratio are determined according to the average value of the sub-pixels of each color, so that errors caused by the display difference among different sub-pixels can be reduced, the determined standard ratio is more accurate, the compensation effect is more accurate, and the uniformity of the compensated display panel is further improved.
Illustratively, if the first display luminance is denoted by Lum _ aver _ udc _ cali _ r, the second display luminance is denoted by Lum _ aver _ udc _ cali _ g, the third display luminance is denoted by Lum _ aver _ udc _ cali _ b, the fourth display luminance is denoted by Lum _ aver _ around _ cali _ r, the fifth display luminance is denoted by Lum _ aver _ around _ cali _ g, the sixth display luminance is denoted by Lum _ aver _ around _ cali _ b, the first ratio is denoted by P _ r _ cali, the second ratio is denoted by P _ g _ cali, and the third ratio is denoted by P _ b _ cali, then:
the third display data comprises a seventh display brightness of the first color sub-pixel, an eighth display brightness of the second color sub-pixel and a ninth display brightness of the third color sub-pixel; the fourth display data includes a tenth display luminance of the first color sub-pixel, an eleventh display luminance of the second color sub-pixel, and a twelfth display luminance of the third color sub-pixel.
Optionally, determining compensation data of the display panel to be compensated according to the standard luminance ratio, the third display data, and the fourth display data, and compensating the display panel to be compensated specifically includes:
determining target brightness of each sub-pixel of a first display area of a display panel to be compensated according to a first ratio, a second ratio, a third ratio, tenth display brightness, eleventh display brightness and twelfth display brightness, wherein the target brightness of the first color sub-pixel is a product of the first ratio and the tenth display brightness, the target brightness of the second color sub-pixel is a product of the second ratio and the eleventh display brightness, and the target brightness of the third color sub-pixel is a product of the third ratio and the twelfth display brightness;
and determining a compensation value of the first color sub-pixel according to the target brightness and the seventh display brightness of the first color sub-pixel, determining a compensation value of the second color sub-pixel according to the target brightness and the eighth display brightness of the second color sub-pixel, and determining a compensation value of the first color sub-pixel according to the target brightness and the ninth display brightness of the third color sub-pixel.
Specifically, the compensation value of each color sub-pixel may be determined according to a difference between the target brightness of each color sub-pixel and the corresponding actual display brightness. For example, the compensation value of the first color sub-pixel is determined according to the difference between the target brightness of the first color sub-pixel and the seventh display brightness, the compensation value of the second color sub-pixel is determined according to the difference between the target brightness of the second color sub-pixel and the eighth display brightness, and the compensation value of the third color sub-pixel is determined according to the difference between the target brightness of the third color sub-pixel and the ninth display brightness.
Optionally, determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data, and the fourth display data, and determining compensation data of the display panel to be compensated, may further include: and determining compensation data of the display panel to be compensated according to the first ratio, the second ratio, the third ratio, the fourth ratio of the seventh display brightness to the tenth display brightness, the fifth ratio of the eighth display brightness to the eleventh display brightness, and the sixth ratio of the ninth display brightness to the twelfth display brightness.
The seventh display brightness may be a display brightness average of the first color sub-pixels of the first display area, the eighth display brightness may be a display brightness average of the second color sub-pixels of the first display area, and the ninth display brightness may be a display brightness average of the third color sub-pixels of the first display area; the tenth display luminance may be a display luminance average value of the first color sub-pixels of the second display region, the eleventh display luminance may be a display luminance average value of the second color sub-pixels of the second display region, and the twelfth display luminance may be a display luminance average value of the third color sub-pixels of the second display region.
Illustratively, if the seventh display luminance is denoted as Lum _ aver _ udc _ r _1, the eighth display luminance is denoted as Lum _ aver _ udc _ g _1, the ninth display luminance is denoted as Lum _ aver _ udc _ b _1, the tenth display luminance is denoted as Lum _ aver _ around _ r _1, the eleventh display luminance is denoted as Lum _ aver _ around _ g _1, the twelfth display luminance is denoted as Lum _ aver _ around _ b _1, the fourth ratio is denoted as P _ r _1, the fifth ratio is denoted as P _ g _1, and the sixth ratio is denoted as P _ b _1, then:
then in the first display area: the target luminance of the first color sub-pixel may be Lum _ aver _ udc _ r _1 _ P _r _ cali/P _ r _1, the target luminance of the second color sub-pixel may be Lum _ aver _ udc _ g _1 _ P _g _ cali/P _ g _1, and the target luminance of the third color sub-pixel may be Lum _ aver _ udc _ b _1 _ P u b _ cali/P _ b _1. The compensation value of each sub-pixel can be determined according to the target brightness of the sub-pixels of each color and the display brightness value of each sub-pixel.
Optionally, the obtaining of the first display data of the first display area and the second display data of the second display area when the standard display panel displays the set gray scale simultaneously includes:
simultaneously shooting a first display image when the standard display panel displays a set gray scale;
determining the display brightness of each sub-pixel of a first display area of the standard display panel and the display brightness of each sub-pixel of a second display area of the standard display panel according to the first display image;
and determining first display data according to the display brightness of each sub-pixel in the first display area of the standard display panel, and determining second display data according to the display brightness of each sub-pixel in the second display area of the standard display panel.
Optionally, the obtaining of the third display data of the first display area and the fourth display data of the second display area when the display panel to be compensated displays the set gray scale simultaneously includes:
simultaneously shooting a second display image when the display panel to be compensated displays the set gray scale;
determining the display brightness of each sub-pixel of a first display area of the display panel to be compensated and the display brightness of each sub-pixel of a second display area of the display panel to be compensated according to the second display image;
and determining third display data according to the display brightness of each sub-pixel of the first display area of the display panel to be compensated, and determining fourth display data according to the display brightness of each sub-pixel of the second display area of the display panel to be compensated.
Specifically, the first display image includes an image of a first display area and an image of a second display area in the standard display panel, and the second display image includes an image of the first display area and an image of the second display area in the display panel to be compensated. The image of the first display area and the image of the second display area in the standard display panel are acquired simultaneously, namely the image of the first display area and the image of the second display area can be acquired by shooting the standard display panel once through the camera, and the compensation error caused by different camera setting parameters is avoided. Similarly, the image of the first display area and the image of the second display area in the display panel to be compensated are acquired simultaneously, so that the compensation error caused by different camera setting parameters is avoided, and the uniformity of the compensated display panel is further improved.
Optionally, the compensation method for a display panel provided in the embodiment of the present invention further includes:
obtaining the display brightness of each sub-pixel in the second display area of the display panel to be compensated after the brightness adjusting sheet is removed;
and determining a compensation value of each sub-pixel according to the display brightness of each sub-pixel and the target display brightness.
Specifically, the target brightness value of each color sub-pixel may be determined according to the brightness average value of each color sub-pixel in the second display area, or may be determined according to the brightness average value of each color sub-pixel in the central area of the second display area, which is not limited in this embodiment. By compensating the second display area, the display uniformity of the second display area is improved, and the display uniformity of the display panel is further improved.
In addition, when the display brightness of each sub-pixel in the second display area of the display panel to be compensated is obtained, the brightness adjusting sheet does not need to cover the first display area, wherein the setting parameters of the image obtaining device when the display brightness of each sub-pixel in the second display area of the display panel to be compensated is obtained are the same as the setting parameters of the image obtaining device when the third display data and the fourth display data are obtained, so that the compensation value of the first display area in the display panel to be compensated and the compensation value of the second display area in the display panel to be compensated can not generate compensation errors due to the difference of the setting parameters of the image obtaining device, and the display uniformity of the compensated display panel is further improved.
The compensation value of the second display area is a compensation gray scale value, which can be obtained according to the following formula:
N X ＝N*(L aver /L n ) 1/Gamma
wherein N is X Is the calculated compensation gray scale, N is the actual display gray scale corresponding to the actual display brightness, L n Is the actual display luminance, L, of the sub-pixel aver The target display brightness is shown, and Gamma is the gray scale brightness Gamma value of the pixel point.
Optionally, the first display area is a transparent display area, and the second display area is a main display area; when the same gray scale is displayed, the luminous brightness of the sub-pixels of the first display area is greater than that of the sub-pixels of the same color of the second display area; the brightness adjusting sheet is a brightness attenuation sheet.
Specifically, an optical device may be disposed in the first display area of the display panel to be compensated, and the optical device may be a camera, for example. The brightness attenuation sheet can enable the brightness of light emitted by the first display area in the display area to be compensated to be close to the brightness of light emitted by the second display area after the light passes through the brightness attenuation sheet.
Fig. 4 is a schematic structural diagram of a compensation apparatus for a display panel according to an embodiment of the present invention, and referring to fig. 4, the compensation apparatus includes an image obtaining module 310 and a data processing module 320; the image acquisition module 310 is connected with the data processing module 320; the image obtaining module 310 is configured to obtain first display data of a first display area and second display data of a second display area simultaneously when the standard display panel displays a set gray scale; the surface of a first display area of the standard display panel is covered with a brightness adjusting sheet, and the first display data is display data of light rays emitted by the first display area after being adjusted by the brightness adjusting sheet; the image obtaining module 310 is configured to obtain third display data of the first display area and fourth display data of the second display area when the display panel to be compensated displays the set gray scale; the surface of the first display area of the display panel to be compensated is covered with a brightness adjusting sheet, and the third display data is the display data of the light emitted by the first display area after being adjusted by the brightness adjusting sheet; the data processing module 320 is configured to determine compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data, and the fourth display data, and compensate the display panel to be compensated.
Optionally, the first display data includes a first display brightness of the first color sub-pixel, a second display brightness of the second color sub-pixel, and a third display brightness of the third color sub-pixel; the second display data comprises a fourth display brightness of the first color sub-pixel, a fifth display brightness of the second color sub-pixel and a sixth display brightness of the third color sub-pixel; the data processing module comprises a first processing unit and a second processing unit; the first processing unit is used for determining the standard brightness ratio of the first display area and the second display area according to a first ratio of the first display brightness to the fourth display brightness, a second ratio of the second display brightness to the fifth display brightness, and a third ratio of the third display brightness to the sixth display brightness; the second processing unit is used for determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data.
Optionally, the first display brightness is a display brightness average value of a first color sub-pixel of the first display area, the second display brightness is a display brightness average value of a second color sub-pixel of the first display area, and the third display brightness is a display brightness average value of a third color sub-pixel of the first display area; the fourth display brightness is the display brightness average value of the first color sub-pixels of the second display area, the fifth display brightness is the display brightness average value of the second color sub-pixels of the second display area, and the sixth display brightness is the display brightness average value of the third color sub-pixels of the second display area.
Optionally, the image obtaining module includes a first image capturing unit, a first brightness determining unit, a first data determining unit, a second image capturing unit, a second brightness determining unit, and a second data determining unit; the first image shooting unit is used for shooting a first display image when the standard display panel displays a set gray scale; the first brightness determining unit is used for determining the display brightness of each sub-pixel of a first display area of the standard display panel and the display brightness of each sub-pixel of a second display area of the standard display panel according to the first display image; the first data determining unit is used for determining first display data according to the display brightness of each sub-pixel of a first display area of the standard display panel and is also used for determining second display data according to the display brightness of each sub-pixel of a second display area of the standard display panel; the second image shooting unit is used for shooting a second display image when the display panel to be compensated displays the set gray scale; the second brightness determining unit is used for determining the display brightness of each sub-pixel of the first display area of the display panel to be compensated and the display brightness of each sub-pixel of the second display area of the display panel to be compensated according to the second display image; the second data determining unit is used for determining third display data according to the display brightness of each sub-pixel of the first display area of the display panel to be compensated and is also used for determining fourth display data according to the display brightness of each sub-pixel of the second display area of the display panel to be compensated.
The compensation device for the display panel of the display panel provided by the embodiment and the compensation method for the display panel provided by any embodiment of the invention belong to the same inventive concept, have corresponding beneficial effects, and the detailed technical details are not detailed in the embodiment, but refer to the compensation method for the display panel provided by any embodiment of the invention.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the embodiments of the present invention are not limited to the specific embodiments described herein, and that various obvious changes, adaptations, and substitutions are possible, without departing from the scope of the embodiments of the present invention. Therefore, although the embodiments of the present invention have been described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and many other equivalent embodiments may be included without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A compensation method of a display panel, wherein the display panel comprises a first display area and a second display area, the compensation method comprising:
simultaneously acquiring first display data of the first display area and second display data of the second display area when a standard display panel displays a set gray scale; the surface of the first display area of the standard display panel is covered with a brightness adjusting sheet, and the first display data is display data of light rays emitted by the first display area after being adjusted by the brightness adjusting sheet;
simultaneously acquiring third display data of the first display area and fourth display data of the second display area when a display panel to be compensated displays a set gray scale; the surface of the first display area of the display panel to be compensated is covered with the brightness adjusting sheet, and the third display data is display data of light rays emitted by the first display area after being adjusted by the brightness adjusting sheet;
determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data, and compensating the display panel to be compensated;
the pixel density of the first display area is lower than that of the second display area;
the brightness adjusting sheet is used for adjusting the brightness of the first display area entering the image acquisition equipment, so that the difference between the display brightness of the light rays emitted by the sub-pixels of the first display area after passing through the brightness adjusting sheet and the display brightness of the sub-pixels of the second display area is within a preset range.
2. The compensation method of claim 1, wherein the first display data comprises a first display luminance of a first color sub-pixel, a second display luminance of a second color sub-pixel, and a third display luminance of a third color sub-pixel; the second display data comprises a fourth display brightness of the first color sub-pixel, a fifth display brightness of the second color sub-pixel and a sixth display brightness of the third color sub-pixel;
determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data, wherein the compensation of the display panel to be compensated comprises the following steps:
determining a standard brightness ratio of the first display area and the second display area according to a first ratio of the first display brightness to the fourth display brightness, a second ratio of the second display brightness to the fifth display brightness, and a third ratio of the third display brightness to the sixth display brightness;
and determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data, and compensating the display panel to be compensated.
3. The compensation method according to claim 2, characterized in that:
the first display brightness is the display brightness average value of the first color sub-pixels of the first display area, the second display brightness is the display brightness average value of the second color sub-pixels of the first display area, and the third display brightness is the display brightness average value of the third color sub-pixels of the first display area;
the fourth display brightness is the display brightness average value of the first color sub-pixels of the second display area, the fifth display brightness is the display brightness average value of the second color sub-pixels of the second display area, and the sixth display brightness is the display brightness average value of the third color sub-pixels of the second display area.
4. The compensation method according to claim 1, characterized in that:
when the standard display panel displays the set gray scale, the first display data of the first display area and the second display data of the second display area are acquired simultaneously, and the method comprises the following steps:
simultaneously shooting a first display image when the standard display panel displays a set gray scale;
determining the display brightness of each sub-pixel of the first display area of the standard display panel and the display brightness of each sub-pixel of the second display area of the standard display panel according to the first display image;
determining the first display data according to the display brightness of each sub-pixel of the first display area of the standard display panel, and determining the second display data according to the display brightness of each sub-pixel of the second display area of the standard display panel;
the method for simultaneously acquiring third display data of a first display area and fourth display data of a second display area when a display panel to be compensated displays a set gray scale comprises the following steps:
simultaneously shooting a second display image when the display panel to be compensated displays a set gray scale;
determining the display brightness of each sub-pixel of a first display area of the display panel to be compensated and the display brightness of each sub-pixel of a second display area of the display panel to be compensated according to the second display image;
and determining the third display data according to the display brightness of each sub-pixel in the first display area of the display panel to be compensated, and determining the fourth display data according to the display brightness of each sub-pixel in the second display area of the display panel to be compensated.
5. The compensation method of claim 1, further comprising:
obtaining the display brightness of each sub-pixel of the second display area of the display panel to be compensated after the brightness adjusting sheet is removed;
and determining a compensation value of each sub-pixel according to the display brightness of each sub-pixel and the target display brightness.
6. The compensation method of claim 1, wherein:
the first display area is a transparent display area, and the second display area is a main display area;
when the same gray scale is displayed, the luminous brightness of the sub-pixels of the first display area is greater than that of the sub-pixels of the same color of the second display area;
the brightness adjusting sheet is a brightness attenuation sheet.
7. The compensation method of claim 2, wherein the third display data comprises a seventh display luminance of the first color sub-pixel, an eighth display luminance of the second color sub-pixel, and a ninth display luminance of the third color sub-pixel; the fourth display data comprises a tenth display brightness of the first color sub-pixel, an eleventh display brightness of the second color sub-pixel and a twelfth display brightness of the third color sub-pixel;
determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data, wherein the compensation of the display panel to be compensated specifically comprises:
determining target brightness of each sub-pixel of a first display area of a display panel to be compensated according to the first ratio, the second ratio, the third ratio, the tenth display brightness, the eleventh display brightness and the twelfth display brightness, wherein,
the target brightness of the first color sub-pixel is the product of the first ratio and the tenth display brightness, the target brightness of the second color sub-pixel is the product of the second ratio and the eleventh display brightness, and the target brightness of the third color sub-pixel is the product of the third ratio and the twelfth display brightness;
determining a compensation value of the first color sub-pixel according to the target brightness of the first color sub-pixel and the seventh display brightness, determining a compensation value of the second color sub-pixel according to the target brightness of the second color sub-pixel and the eighth display brightness, and determining a compensation value of the first color sub-pixel according to the target brightness of the third color sub-pixel and the ninth display brightness.
8. A compensation apparatus of a display panel, wherein the display panel includes a first display region and a second display region, the compensation apparatus comprising: the system comprises an image acquisition module and a data processing module;
the image acquisition module is connected with the data processing module;
the image acquisition module is used for simultaneously acquiring first display data of the first display area and second display data of the second display area when a standard display panel displays a set gray scale; the surface of the first display area of the standard display panel is covered with a brightness adjusting sheet, and the first display data are display data obtained by adjusting light rays emitted by the first display area through the brightness adjusting sheet;
the image acquisition module is used for simultaneously acquiring third display data of the first display area and fourth display data of the second display area when a display panel to be compensated displays a set gray scale; the surface of the first display area of the display panel to be compensated is covered with the brightness adjusting sheet, and the third display data are display data obtained by adjusting light rays emitted by the first display area through the brightness adjusting sheet;
the data processing module is used for determining compensation data of the display panel to be compensated according to the first display data, the second display data, the third display data and the fourth display data, and compensating the display panel to be compensated;
the pixel density of the first display area is lower than that of the second display area;
the brightness adjusting sheet is used for adjusting the brightness of the first display area entering the image acquisition equipment, so that the difference between the display brightness of the light rays emitted by the sub-pixels of the first display area after passing through the brightness adjusting sheet and the display brightness of the sub-pixels of the second display area is within a preset range.
9. The compensation arrangement of claim 8, wherein the first display data comprises a first display luminance of a first color sub-pixel, a second display luminance of a second color sub-pixel, and a third display luminance of a third color sub-pixel; the second display data comprises a fourth display brightness of the first color sub-pixel, a fifth display brightness of the second color sub-pixel and a sixth display brightness of the third color sub-pixel;
the data processing module comprises a first processing unit and a second processing unit:
the first processing unit is used for determining the standard brightness ratio of the first display area and the second display area according to a first ratio of the first display brightness to the fourth display brightness, a second ratio of the second display brightness to the fifth display brightness, and a third ratio of the third display brightness to the sixth display brightness;
the second processing unit is used for determining compensation data of the display panel to be compensated according to the standard brightness ratio, the third display data and the fourth display data, and compensating the display panel to be compensated.
10. The compensation apparatus of claim 9, wherein:
the first display brightness is the display brightness average value of the first color sub-pixels of the first display area, the second display brightness is the display brightness average value of the second color sub-pixels of the first display area, and the third display brightness is the display brightness average value of the third color sub-pixels of the first display area;
the fourth display brightness is the display brightness average value of the first color sub-pixels of the second display area, the fifth display brightness is the display brightness average value of the second color sub-pixels of the second display area, and the sixth display brightness is the display brightness average value of the third color sub-pixels of the second display area.
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| CN112086055A (en) * | 2020-09-15 | 2020-12-15 | 昆山工研院新型平板显示技术中心有限公司 | Brightness compensation method and equipment of display panel and display device |
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