CN113327532B - Color cast compensation method and device of display panel, computer equipment and medium - Google Patents

Color cast compensation method and device of display panel, computer equipment and medium Download PDF

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CN113327532B
CN113327532B CN202110465537.5A CN202110465537A CN113327532B CN 113327532 B CN113327532 B CN 113327532B CN 202110465537 A CN202110465537 A CN 202110465537A CN 113327532 B CN113327532 B CN 113327532B
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compensation
channel
display panel
data
pixel point
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CN113327532A (en
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姚宪
李靖宇
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Huaxingyuanchuang Chengdu Technology Co ltd
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Huaxingyuanchuang Chengdu Technology Co ltd
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction

Abstract

One embodiment of the invention discloses a color cast compensation method and device of a display panel, computer equipment and a medium, wherein the display panel comprises M multiplied by N pixel points, M represents the number of rows, M >1, N represents the number of columns, and N >1, and the method comprises the following steps: s10, acquiring multiple groups of original data of the M multiplied by N pixel points under different observation angles; s20, respectively carrying out data processing on each group of original data and acquiring brightness compensation data of each pixel point according to a preset rule; and S30, compensating the M multiplied by N pixel points in the display panel according to the brightness compensation data. According to the technical scheme, different channel reference compensation is alternately used for every pixel point in the display panel in an interlaced mode and every other pixel point in the display panel in an interlaced mode, and different angle compensation coefficients are alternately used for every other pixel point in the display panel in an interlaced mode, so that color cast compensation under a side viewing angle of the display panel is achieved.

Description

Color cast compensation method and device of display panel, computer equipment and medium
Technical Field
The invention relates to the technical field of display panels. And more particularly, to a color shift compensation method and apparatus for a display panel, a computer device, and a medium.
Background
Due to the manufacturing process or process problems, the Display panels such as Liquid Crystal Displays (LCDs), organic Light-Emitting diodes (OLEDs), micro Light-Emitting diodes (Micro leds), and submillimeter Light-Emitting diodes (minileds) have non-uniform Display in terms of brightness or chromaticity, i.e., mura phenomenon. In the prior art, a conventional compensation method is Demura operation, that is, brightness reduction adjustment is performed on an area with brightness higher than a reference, and brightness improvement adjustment is performed on an area with brightness lower than a standard.
However, conventionally produced products are Mura compensated for at front viewing angles (i.e. eyes facing the product), and in fact some products have visual differences at side viewing angles, i.e. when our eyes look at the product obliquely, there are differences at different viewing angles.
Disclosure of Invention
In view of the above, the present invention provides a color shift compensation method and apparatus for a display panel, a computer device and a medium.
In a first aspect, the present invention provides a color cast compensation method for a display panel, where the display panel includes M × N pixels, M represents a row number, M >1, N represents a column number, and N >1, the method includes:
s10, acquiring multiple groups of original data of the MXN pixel points under different observation angles;
s20, respectively carrying out data processing on each group of original data and acquiring brightness compensation data of each pixel point according to a preset rule;
and S30, compensating the M multiplied by N pixel points in the display panel according to the brightness compensation data.
In a specific embodiment, the S10 further includes:
s100, respectively shooting the display panel at multiple angles to obtain multiple groups of RGB three-channel data of the MxN pixel points at different angles;
and S102, carrying out gamma correction on the multiple groups of RGB three-channel data to obtain multiple groups of XYZ tristimulus value data corresponding to the multiple groups of RGB three-channel data.
In a specific embodiment, the S20 further includes:
s200, establishing a data compensation model by using the multiple groups of XYZ tristimulus value data;
s202, carrying out data processing on the multi-angle XYZ tristimulus value data of each pixel point according to the data compensation model to obtain multi-angle compensation coefficients of each pixel point;
and S204, acquiring brightness compensation data of each pixel point according to the preset rule and the compensation coefficient.
In a specific embodiment, the S202 further includes:
s2020, carrying out normalization processing on the multi-angle XYZ tristimulus value data of each pixel point by taking the XYZ tristimulus value data under a preset angle as a reference according to the data compensation model to obtain the multi-angle normalized XYZ tristimulus value data of each pixel point;
s2022, taking the X value as a reference denominator, acquiring compensation coefficients of the Y value and the Z value relative to the X value for the multi-angle normalized XYZ tristimulus value data of each pixel point to acquire an R channel reference compensation table, wherein the R channel reference compensation table comprises the multi-angle R channel compensation coefficients of each pixel point;
s2024, taking the Y value as a reference denominator, acquiring compensation coefficients of the X value and the Z value relative to the Y value for the multi-angle normalized XYZ tristimulus value data of each pixel point to acquire a G channel reference compensation table, wherein the G channel reference compensation table comprises the multi-angle G channel compensation coefficients of each pixel point;
s2026, taking the Z value as a reference denominator, obtaining the compensation coefficients of the X value and the Y value relative to the Z value for the multi-angle normalized XYZ tristimulus value data of each pixel point to obtain a B channel reference compensation table, wherein the B channel reference compensation table comprises the multi-angle B channel compensation coefficients of each pixel point.
In a specific embodiment, the preset rule is to perform row and column spacing compensation on the multi-angle normalized XYZ tristimulus value data of each pixel point according to the R channel compensation coefficient, the G channel compensation coefficient, and the B channel compensation coefficient, respectively.
In a specific embodiment, the preset rule includes row compensation information and column compensation information, wherein,
the line compensation information is used for determining reference compensation information of each channel of each pixel point of the mth line of the display panel, wherein 1-M is less than or equal to M, and the reference compensation information comprises the R channel compensation coefficient, the G channel compensation coefficient or the B channel compensation coefficient;
the column compensation information is used for determining angle compensation information of all pixel points in the nth column of the display panel, and N is less than or equal to 1 and less than or equal to N;
or
The line compensation information is used for determining angle compensation information of all pixel points in the mth line of the display panel, and the M is restricted to be less than or equal to 1;
the column compensation information is used for determining reference compensation information of each channel of each pixel point of the nth column of the display panel, wherein 1-N is less than or equal to N, and the reference compensation information comprises the R channel compensation coefficient, the G channel compensation coefficient or the B channel compensation coefficient.
In a specific embodiment, the row compensation information of the pixels in the adjacent rows in the display panel is different, and the column compensation information of the pixels in the adjacent columns in the display panel is different.
In a second aspect, the present invention provides a color shift compensation device for a display panel, where the display panel includes M × N pixels, M represents a row number, M >1, N represents a column number, and N >1, the device includes:
the acquisition module is used for acquiring a plurality of groups of original data of the MXN pixel points under different observation angles;
the processing module is used for carrying out data processing on each group of original data and acquiring brightness compensation data of the pixel points according to a preset rule;
and the compensation module is used for compensating the M multiplied by N pixel points in the display panel according to the brightness data.
In a third aspect, the invention provides a computer apparatus comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a method as described in the first aspect.
In a fourth aspect, the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method as described in the first aspect.
The invention has the following beneficial effects:
aiming at the existing problems, the invention sets a color cast compensation method and device, computing equipment and a medium of a display panel, realizes color cast compensation under a side view angle of the display panel by alternately using different channel reference compensation for every interlaced line and every alternate line of each pixel point in the display panel and alternately using different angle compensation coefficients for every alternate line according to a jitter compensation idea, and can perform visual optimization on the problem that compensation of other view angles can be directly influenced after the conventional specified view angle is compensated, thereby improving the display effect of the display panel and improving user experience.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart illustrating a color shift compensation method for a display panel according to an embodiment of the present application.
FIG. 2 shows a schematic image acquisition at a front view angle and a side view angle according to an embodiment of the present application.
Fig. 3 is a schematic diagram illustrating XYZ tristimulus value data collected at different angles by a certain pixel point according to an embodiment of the present application.
FIG. 4 shows a schematic diagram of a data compensation model according to an embodiment of the present application.
Fig. 5 shows normalized XYZ tristimulus values for a certain pixel point according to an embodiment of the present application.
Fig. 6a-6c are graphs illustrating luminance compensation data of a pixel according to an embodiment of the present application.
Fig. 7 shows a schematic diagram of color shift compensation of a display panel according to an embodiment of the present application.
Fig. 8 shows a schematic diagram of the principle of Mura compensation of a display panel according to an embodiment of the present application.
Fig. 9 shows a schematic diagram of the principle of Mura compensation of a display panel according to yet another embodiment of the present application.
Fig. 10 shows a schematic diagram of a color shift compensation device of a display panel according to an embodiment of the present application.
FIG. 11 shows a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
The conventional Demura compensation technology is directed to a case where luminance or chromaticity of a display panel is not uniform when a line of sight is directed to the display panel (i.e., a front view angle) to perform Mura compensation. However, no matter the material, the process, or the power supply of the Led product, the inventor finds that the light intensities of the lights with different colors in the display screen at different viewing angles are different, so that when the sight of a technician is not directly facing the Led product (i.e. the viewing angle), the mixture ratio of the mixed light perceived by human eyes is unbalanced, and the color cast of the display panel is observed, which affects the use of the user.
Therefore, the invention provides a method for carrying out color cast compensation aiming at the color cast phenomenon in a display panel under a side view angle, which comprises the following steps: acquiring a plurality of groups of original data of the M multiplied by N pixel points under different observation angles; respectively carrying out data processing on each group of original data and acquiring brightness compensation data of the pixel points according to a preset rule; and compensating the M multiplied by N pixel points in the display panel according to the brightness compensation data.
The preset rule is used for performing row-spacing and column-spacing compensation on M multiplied by N pixel points in the display panel, and the preset rule comprises row compensation information and column compensation information. It should be noted that, the row compensation information of the pixels in adjacent rows in the display panel is different, and the column compensation information of the pixels in adjacent columns in the display panel is different.
According to the method for compensating color cast of the display panel, the color cast compensation under the side viewing angle of the display panel is realized by alternately using different channel reference compensation for every pixel point in the display panel in an interlaced and alternate mode and alternately using different angle compensation coefficients in an interlaced and alternate mode according to the jitter compensation idea, the problem that compensation of other viewing angles can be directly influenced after conventional specified viewing angles are compensated can be visually optimized, the display effect of the display panel is improved, and user experience is improved.
In an embodiment, the display panel includes M × N pixels, where M represents a row number, M >1, N represents a column number, and N >1, as shown in fig. 1, the color shift compensation method includes:
and S10, acquiring multiple groups of original data of the M multiplied by N pixel points under different observation angles.
In one specific example, the display panel is photographed from multiple angles using an image capturing device, wherein the image capturing device may be a planar array chrominance camera, a high-resolution and high-precision CCD or cmos camera, or the like. The choice of camera resolution depends on factors such as the resolution, size, and shooting distance of the display panel being detected.
The method comprises the steps that a camera collects images of a display panel under different observation angles to obtain multiple groups of RGB three-channel data of M multiplied by N pixel points in the display panel under different angles, wherein an RGB color mode is a color standard in the industry, and RGB color space is not uniform visually, so that in order to accord with a perception curve of human eyes to brightness, gamma (gamma) correction needs to be carried out on the obtained RGB three-channel data to obtain XYZ tristimulus value data under a CIE space, wherein the XYZ tristimulus value data are compensation quantities corresponding to the RGB three-channel data, X corresponds to an R channel, Y corresponds to a G channel, and Z corresponds to a B channel.
As shown in fig. 2, l is an observation angle when the line of sight faces the display panel, and is marked as a positive viewing angle of 0 °; l. the 1 、l 2 、l 3 Or l 4 When the sight line does not face the display panel, the observation angle is recorded as a side viewing angle, wherein the sight line l 1 Has an observation angle of left theta 1 Line of sight l 3 Has an observation angle of right theta 2 . As will be apparent to those skilled in the art, the line of sight l 2 And line of sight l 4 Again corresponding to two different viewing angles. The value and the number of observation angles are not limited in the application, and each user-defined observation angle can be usedThe specific setting of the angle depends on the actual application.
In this embodiment, the side viewing angle is left 50 °, left 40 °, left 30 °, left 20 °, left 10 °,0 °, right 50 °, right 40 °, right 30 °, right 20 °, and right 10 ° as an example, the display panel is photographed at the above different angles, and XYZ tristimulus data corresponding to M × N pixel points is finally obtained, as shown in fig. 3, the XYZ tristimulus data is acquired by a single pixel point at different angles, wherein, in the present application, the display panel at the front viewing angle is subjected to Mura compensation by using a conventional Demura technique, and therefore, the XYZ tristimulus data at the front viewing angle of 0 ° can be used as reference datum data.
It should be understood by those skilled in the art that fig. 3 is image raw data of a single pixel point, and there are M × N groups of image raw data such as the image raw data of fig. 3 in this application to represent image information corresponding to a certain pixel point and different observation angles, and this application is not described in detail here.
And S20, respectively carrying out data processing on each group of original data and acquiring brightness compensation data of the pixel points according to a preset rule.
In a specific example, the S20 further includes:
s200, establishing a data compensation model by using the multiple groups of XYZ tristimulus value data;
according to the step S10, XYZ tristimulus value data corresponding to each pixel point at different observation angles in the display panel as shown in fig. 3 can be acquired, and further, a data compensation model is established by using the acquired XYZ tristimulus value data corresponding to each pixel point at different observation angles.
As shown in fig. 4, a data compensation model of a display panel having M =3 rows and N =4 columns of pixels is taken as an example to describe, where a plane formed by xy coordinate axes represents a display panel divided into 3 × 4 pixels, each small square represents a pixel, and the z-axis direction represents an observation angle, so as to be seen from fig. 4, each pixel corresponds to a different observation angle, for example, a pixel with plane coordinates (1, 1) corresponds to observation angles of 0 °,10 °,20 °, and 30 °, and the corresponding coordinate points in fig. 4 are: (1, 0), (1, 10), (1, 20) and (1, 30).
Those skilled in the art should understand that XYZ tristimulus values corresponding to the pixel points in the 1 st row and the 1 st column at 0 ° are stored in the (1, 0) pixel points, and XYZ tristimulus values corresponding to the pixel points in the 1 st row and the 1 st column at 10 ° and the like are stored in the (1, 10) pixel points, so that a data compensation model is established by using the acquired XYZ tristimulus values data corresponding to the pixel points at different observation angles.
S202, carrying out data processing on the multi-angle XYZ tristimulus value data of each pixel point according to the data compensation model to obtain a multi-angle compensation coefficient of each pixel point.
In a specific example, the S202 further includes:
s2020, carrying out normalization processing on the multi-angle XYZ tristimulus value data of each pixel point by taking the XYZ tristimulus value data under a preset angle as a reference according to the data compensation model to obtain the multi-angle normalized XYZ tristimulus value data of each pixel point;
for example, as shown in fig. 5, the normalized relative values at each viewing angle are obtained by using XYZ tristimulus value data at a normal viewing angle of 0 ° as a reference, wherein the compensation coefficients of the color cast corresponding to the normal viewing angle at different viewing angles can be more intuitively displayed by using a method of representing the relative values.
S2022, as shown in fig. 6b, for the multi-angle normalized XYZ tristimulus value data of each pixel, taking the X value as a reference denominator, obtaining compensation coefficients of the Y value and the Z value relative to the X value to obtain an R channel reference compensation table, where the R channel reference compensation table includes the R channel compensation coefficients of the multi-angle of each pixel.
It should be noted that RGB represents RGB light-emitting sub-pixels or color channels of the display panel, each pixel includes three RGB channels, and when performing color shift compensation on a pixel, the compensation needs to be performed on three channels of R, G, and B.
In fig. 6b, the corresponding relationship between the compensation coefficient and the angle of each channel in the R-channel reference compensation table is plotted as a curve, for example, the solid line represents the corresponding relationship between the compensation coefficient (correction ratio) and the observation angle in the R-channel, and the solid line represents a straight line with the compensation coefficient being constant 1 because of the R-channel reference compensation; the short dotted line represents the corresponding relationship between the compensation coefficient and the observation angle in the G channel under the R channel reference compensation, and the long dotted line represents the corresponding relationship between the compensation coefficient and the observation angle in the B channel under the R channel reference compensation.
S2024, as shown in fig. 6a, for the multi-angle normalized XYZ tristimulus value data of each pixel, taking the Y value as a reference denominator, obtaining the compensation coefficients of the X value and the Z value relative to the Y value to obtain a G channel reference compensation table, where the G channel reference compensation table includes the multi-angle G channel compensation coefficients of each pixel.
Similarly, the corresponding relationship between the compensation coefficient and the angle of each channel in the G-channel reference compensation table is plotted as a curve, and in fig. 6a, the solid line represents the corresponding relationship between the compensation coefficient and the observation angle in the R-channel under the G-channel reference compensation; the short dashed line represents the corresponding relation between the compensation coefficient and the observation angle in the G channel, and is the G channel reference compensation, so that the G channel reference compensation is a straight line with the constant compensation coefficient of 1; the long dotted line represents the corresponding relationship between the compensation coefficient and the observation angle in the B channel under the G channel reference compensation.
S2026, as shown in fig. 6c, for the multi-angle normalized XYZ tristimulus value data of each pixel point, taking the Z value as a reference denominator, obtaining the compensation coefficients of the X value and the Y value relative to the Z value to obtain a B channel reference compensation table, where the B channel reference compensation table includes the multi-angle B channel compensation coefficients of each pixel point.
Similarly, the corresponding relationship between the compensation coefficient and the angle of each channel in the B-channel reference compensation table is plotted as a curve, and in fig. 6c, the solid line represents the corresponding relationship between the compensation coefficient and the observation angle in the R-channel under the B-channel reference compensation; the short dashed line represents the corresponding relation between the compensation coefficient and the observation angle in the G channel under the B channel reference compensation; the long dotted line represents the correspondence between the compensation coefficient and the observation angle in the B channel, and is a straight line in which the compensation coefficient is constant at 1 because the B channel reference compensation is performed.
Thus, for a single pixel point, the compensation coefficients of the pixel point, that is, the compensation coefficients at different observation angles under R-channel reference compensation, B-channel reference compensation and G-channel reference compensation, can be obtained.
And S204, obtaining the brightness compensation data of each pixel point according to the preset rule and the compensation coefficient.
It should be noted that, through testing, color cast of each viewing angle is not completely consistent, and each pixel point in the display panel corresponds to the luminance output of all the viewing angles, but the adjustable voltage is only one path, so that no matter any one viewing angle is adjusted in a targeted manner, other viewing angles cannot be completely accurate. In another embodiment, the rows and columns may be viewed as row groups or column groups, each group comprising one or more rows and one or more columns, compensated by controlling the data of each group.
Specifically, the data compensation rule includes row compensation information and column compensation information of a display panel, assuming that the display panel includes M × N pixels, M represents a row number, M >1, N represents a column number, N >1, wherein,
the line compensation information is used for determining reference compensation information of each channel of each pixel point of the mth line of the display panel, wherein 1-M is less than or equal to M, and the reference compensation information comprises the R channel compensation coefficient, the G channel compensation coefficient or the B channel compensation coefficient;
for example, for all the pixel points in the 1 st row, R channel reference compensation is used, that is, X is unchanged, and Y and Z are compensated relatively, so as to obtain an R channel compensation coefficient; g channel reference compensation is used for all pixel points in the 2 nd row, namely Y is unchanged, and X and Z are compensated relatively to obtain a G channel compensation coefficient; and B channel reference compensation is used for all pixel points in the 3 rd row, namely Z is unchanged, and X and Y are compensated relatively to obtain a B channel compensation coefficient.
The column compensation information is used for determining observation angle compensation information of pixels in the nth column of the display panel, wherein N is restricted to 1 but not more than N.
For example, angle left 50 ° compensation data is used for all pixel points in column 1; using compensation data with an angle of 40 degrees left for all pixel points in the 2 nd column; angle 0 ° compensation data and the like are used for all pixel points in column 3.
It should be noted that the row compensation information or the column compensation information is exemplary, in an optional example, the row compensation information is used to determine angle compensation information of pixel points in an mth row of the display panel, and 1< -M ≦ M; the column compensation information is used for determining channel reference compensation information of pixels in the nth column of the display panel, wherein 1< N is less than or equal to N, and the channel reference compensation information comprises the R channel reference compensation, the G channel reference compensation or the B channel reference compensation.
For a single pixel point, the corresponding relations between the compensation coefficients of the pixel point under the R channel reference compensation, the B channel reference compensation and the G channel reference compensation and different observation angles exist, so that for the pixel point on the mth row and the nth column, the compensation coefficient corresponding to the angle compensation information can be found on the reference compensation curve of the channel corresponding to the pixel point through a preset compensation rule as long as the reference compensation information and the angle compensation information of each channel of the pixel point are determined, and therefore the brightness compensation data are obtained.
In a specific example, as shown in fig. 7, a schematic color shift compensation diagram of a display panel having M =8 rows and N =3 columns of pixel points, as can be seen from fig. 7, row-1 acts as G channel reference compensation, row-2 acts as R channel reference compensation, the first column uses compensation information of 0 °, the 2 nd column uses compensation information of 20 ° at the left, and the 3 rd column uses compensation information of 20 ° at the right, where the description is given by taking the pixel points in Row-1 and the 2 nd column as an example to perform color shift compensation:
the Row 2 and column 2 pixel points in Row-1 have corresponding relationship curves of compensation coefficients and different observation angles under R-channel reference compensation, B-channel reference compensation and G-channel reference compensation, which are similar to those shown in FIGS. 6a-c, respectively, and because G-channel reference compensation is adopted for the Row 2 and column Row-Row-1 pixel points, only the G-channel reference compensation curve similar to that shown in FIG. 6a is needed.
Specifically, when R channels in Row-1 and column-2 pixels are compensated, referring to an R channel curve corresponding to a solid line in fig. 6a, a first compensation coefficient corresponding to 20 ° left is found on the R channel curve; when compensating for the G channel in the Row-1, column-2 pixel point, see the G channel curve corresponding to the short dashed line in fig. 6a, find a second compensation coefficient corresponding to 20 ° left on the G channel curve; when the B channel in the Row-1 and column-2 pixel points is compensated, referring to a B channel curve corresponding to a long dashed line in fig. 6a, a third compensation coefficient corresponding to 20 ° left is found on the B channel curve.
Therefore, after the first compensation coefficient, the second compensation coefficient and the third compensation coefficient are determined according to the data compensation rule, brightness compensation data corresponding to the R, G and B channels corresponding to the pixel point are obtained, color cast compensation is performed on the Row-1 Row and column 2 pixel points according to the brightness compensation data, and similarly, compensation on the Row-1 Row and column 1 pixel points, the Row-1 Row and column 3 pixel points and the like is completed, so that color cast compensation of the whole display panel is completed.
Specifically, fig. 8 is a schematic diagram of the Mura compensation of the display panel in this embodiment, as shown in fig. 8, the high-precision camera acquires luminance data of the display panel to be compensated, that is, XYZ tristimulus value data, acquires known gray scale/product luminance information of a qualified product, obtains Mura information (bad information) of the display panel to be compensated by comparison, calculates a data compensation coefficient for eliminating Mura based on the information, that is, demura data, writes the Demura data in the flash memory and burns the data into the display panel (chip burn write), and thereby completes Mura compensation of the display panel to be compensated.
It should be noted that each channel compensation curve in fig. 7 is exemplary, and is used to explain the compensation principle, and does not constitute an improper limitation on the compensation relationship of the specific channel curve of the pixel.
And S30, compensating the M multiplied by N pixel points in the display panel according to the brightness compensation data.
Specifically, as shown in fig. 9, the luminance compensation data is loaded into the display circuit, and the luminance compensation data is further fed back to the voltage output terminal through the display circuit to adjust the voltage of the display panel, so as to achieve the effect of performing color shift compensation on the display panel.
According to the color cast compensation method of the display panel, the color cast compensation under the side viewing angle of the display panel is realized by alternately using different channel reference compensation for every interlaced line/row of each pixel point in the display panel and alternately using different angle compensation coefficients for every interlaced line/row according to the jitter compensation idea, the problem that the compensation of other viewing angles can be directly influenced after the conventional specified viewing angle is compensated can be visually optimized, so that the display effect of the display panel is improved, and the user experience is improved.
As shown in fig. 10, another embodiment of the present invention provides a color shift compensation apparatus for a display panel, wherein the display panel includes M × N pixels, M represents a row number, M >1, N represents a column number, and N >1, and the apparatus includes:
an obtaining module 800, configured to obtain multiple sets of original data of the mxn pixel points at different observation angles; a processing module 802, configured to perform data processing on each group of original data to obtain luminance compensation data of the pixel point; and the compensation module 804 is configured to compensate the M × N pixel points in the display panel according to the brightness data.
It will be appreciated by those skilled in the art that the color shift compensation apparatus for a display panel described above may also include other well-known structures, such as processors, memories, etc., which are not shown in fig. 10 in order to unnecessarily obscure embodiments of the present disclosure.
It should be noted that the principle and the working flow of the color shift compensation apparatus of the display panel provided in this embodiment are similar to those of the color shift compensation method of the display panel provided in the foregoing embodiment, and reference may be made to the above description for relevant points, which are not described herein again.
Aiming at the existing problems, the invention makes a color cast compensation device of a display panel, realizes color cast compensation under the side viewing angle of the display panel by alternately using different channel reference compensation for every interlaced line/row of each pixel point in the display panel and alternately using different angle compensation coefficients for every interlaced line/row according to the jitter compensation thought, and can perform visual optimization on the problem that compensation of other viewing angles can be directly influenced after conventional specified viewing angles are compensated, thereby improving the display effect of the display panel and improving user experience.
Fig. 11 shows a schematic structural diagram of a computer device according to another embodiment of the present invention. The computer device 50 shown in fig. 11 is only an example and should not bring any limitation to the function and the scope of use of the embodiments of the present invention.
As shown in fig. 11, computer device 50 is in the form of a general purpose computing device. The components of computer device 50 may include, but are not limited to: one or more processors or processing units 500, a system memory 516, and a bus 501 that couples various system components including the system memory 516 and the processing unit 500.
Bus 501 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. By way of example, such architectures include, but are not limited to, industry Standard Architecture (ISA) bus, micro-channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Computer device 50 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by computer device 50 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 516 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 504 and/or cache memory 506. The computer device 50 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 508 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 11 and commonly referred to as a "hard drive"). Although not shown in FIG. 11, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 501 by one or more data media interfaces. Memory 516 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiment one.
A program/utility 510 having a set (at least one) of program modules 512 may be stored, for example, in memory 516, such program modules 512 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 512 generally perform the functions and/or methodologies of the described embodiments of the invention.
Computer device 50 may also communicate with one or more external devices 70 (e.g., keyboard, pointing device, display 60, etc.), with one or more devices that enable a user to interact with the computer device 50, and/or with any devices (e.g., network card, modem, etc.) that enable the computer device 50 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 502. Also, computer device 50 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet) through network adapter 514. As shown in FIG. 11, network adapter 514 communicates with the other modules of computer device 50 via bus 501. It should be appreciated that although not shown in FIG. 11, other hardware and/or software modules may be used in conjunction with computer device 50, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
The processor unit 500 executes various functional applications and data processing by running a program stored in the system memory 516, for example, to implement the color shift compensation method of the display panel provided in the foregoing embodiment.
Aiming at the existing problems, the invention sets a computer device for realizing the color cast compensation method of the display panel, realizes the color cast compensation under the side viewing angle of the display panel by alternately using different channel reference compensation for every interlaced line/row of each pixel point in the display panel and alternately using different angle compensation coefficients for every interlaced line/row according to the shaking compensation idea, and can perform visual optimization on the problem that the compensation of other viewing angles can be directly influenced after the compensation is performed on the conventional specified viewing angle, thereby improving the display effect of the display panel and improving the user experience.
Another embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the color shift compensation method of the display panel provided by the foregoing embodiment.
In practice, the computer readable storage medium may take any combination of one or more computer readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present embodiment, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
Aiming at the existing problems, the invention sets a storage medium storing a color cast compensation method of a display panel, realizes color cast compensation under a side view angle of the display panel by alternately using different channel reference compensation for each pixel point in the display panel in an interlaced/row mode and alternately using different angle compensation coefficients for the interlaced/row mode according to a jitter compensation idea, and can perform visual optimization on the problem that compensation of other view angles can be directly influenced after compensation is performed on a conventional specified view angle, thereby improving the display effect of the display panel and improving user experience.
In the description of the present application, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims (10)

1. A color cast compensation method for a display panel, wherein the display panel comprises M × N pixels, M represents a row number, M >1, N represents a column number, and N >1, the method comprising:
s10, acquiring multiple groups of original data of the MXN pixel points under different observation angles;
s20, respectively carrying out data processing on each group of original data and acquiring brightness compensation data of each pixel point according to a preset rule; the preset rule comprises alternately using different channel reference compensation in an interlaced/column mode and alternately using different angle compensation in an interlaced/row mode according to each pixel point in the display panel, wherein the channels comprise an R channel, a G channel and a B channel;
and S30, compensating the M multiplied by N pixel points in the display panel according to the brightness compensation data.
2. The method of claim 1, wherein the S10 further comprises:
s100, respectively shooting the display panel at multiple angles to obtain multiple groups of RGB three-channel data of the MxN pixel points at different angles;
and S102, carrying out gamma correction on the multiple groups of RGB three-channel data to obtain multiple groups of XYZ tri-stimulus value data corresponding to the multiple groups of RGB three-channel data.
3. The method of claim 2, wherein the S20 further comprises:
s200, establishing a data compensation model by using the multiple groups of XYZ tristimulus value data;
s202, carrying out data processing on the multi-angle XYZ tristimulus value data of each pixel point according to the data compensation model to obtain a multi-angle compensation coefficient of each pixel point;
and S204, acquiring brightness compensation data of each pixel point according to the preset rule and the compensation coefficient.
4. The method of claim 3, wherein the S202 further comprises:
s2020, carrying out normalization processing on the multi-angle XYZ tristimulus value data of each pixel point by taking the XYZ tristimulus value data under a preset angle as a reference according to the data compensation model to obtain the multi-angle normalized XYZ tristimulus value data of each pixel point;
s2022, taking the X value as a reference denominator, acquiring compensation coefficients of the Y value and the Z value relative to the X value for the multi-angle normalized XYZ tristimulus value data of each pixel point to acquire an R channel reference compensation table, wherein the R channel reference compensation table comprises the multi-angle R channel compensation coefficients of each pixel point;
s2024, taking the Y value as a reference denominator, acquiring compensation coefficients of the X value and the Z value relative to the Y value for the multi-angle normalized XYZ tristimulus value data of each pixel point to acquire a G channel reference compensation table, wherein the G channel reference compensation table comprises the multi-angle G channel compensation coefficients of each pixel point;
s2026, for the multi-angle normalized XYZ tristimulus value data of each pixel point, taking the Z value as a reference denominator, obtaining compensation coefficients of the X value and the Y value relative to the Z value so as to obtain a B channel reference compensation table, wherein the B channel reference compensation table comprises the multi-angle B channel compensation coefficients of each pixel point.
5. The method as claimed in claim 4, wherein the predetermined rule is to perform row and column spacing compensation on the multi-angle normalized XYZ tristimulus value data of each pixel point according to the R channel compensation coefficient, the G channel compensation coefficient and the B channel compensation coefficient, respectively.
6. The method of claim 5, wherein the preset rule comprises row compensation information and column compensation information, wherein,
the line compensation information is used for determining reference compensation information of each channel of each pixel point of the mth line of the display panel, wherein 1< -M is less than or equal to M, and the reference compensation information comprises the R channel compensation coefficient, the G channel compensation coefficient or the B channel compensation coefficient;
the column compensation information is used for determining angle compensation information of each pixel point of the nth column of the display panel, wherein N is restricted to 1 but not more than N;
or
The line compensation information is used for determining angle compensation information of all pixel points in the mth line of the display panel, and the M is restricted to be less than or equal to 1;
the column compensation information is used for determining reference compensation information of each channel of each pixel point of the nth column of the display panel, wherein 1< -N is less than or equal to N, and the reference compensation information comprises the R channel compensation coefficient, the G channel compensation coefficient or the B channel compensation coefficient.
7. The method of claim 6, wherein the row compensation information for adjacent rows of pixels in the display panel is different and the column compensation information for adjacent columns of pixels in the display panel is different.
8. A color shift compensation apparatus for a display panel, wherein the display panel comprises M × N pixels, M represents a number of rows, M >1, N represents a number of columns, and N >1, the apparatus comprising:
the acquisition module is used for acquiring a plurality of groups of original data of the MXN pixel points under different observation angles;
the processing module is used for carrying out data processing on each group of original data and acquiring brightness compensation data of each pixel point according to a preset rule, wherein the preset rule is used for carrying out row and column spacing compensation on M multiplied by N pixel points in the display panel; the preset rule comprises alternately using different channel reference compensation according to interlaced lines/lines of each pixel point in the display panel and alternately using different angle compensation according to interlaced lines/lines of each pixel point in the display panel, wherein the channels comprise an R channel, a G channel and a B channel;
and the compensation module is used for compensating the M multiplied by N pixel points in the display panel according to the brightness compensation data.
9. A computer device, comprising:
one or more processors;
storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-7.
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