CN115101026B - Color cast compensation method and device, electronic equipment and storage medium - Google Patents

Color cast compensation method and device, electronic equipment and storage medium Download PDF

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Publication number
CN115101026B
CN115101026B CN202210827804.3A CN202210827804A CN115101026B CN 115101026 B CN115101026 B CN 115101026B CN 202210827804 A CN202210827804 A CN 202210827804A CN 115101026 B CN115101026 B CN 115101026B
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pixel data
data compensation
display panel
compensation value
determining
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CN115101026A (en
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赫明真
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Beijing Orende Microelectronics Technology Co ltd
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Beijing Orende Microelectronics 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
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours

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

Abstract

The disclosure relates to a color cast compensation method and device, electronic equipment and a storage medium. In the embodiment of the disclosure, firstly, a pixel data compensation value of a pixel in a display panel on a single channel is obtained, and according to the pixel data compensation value on the single channel, the mapping relation between the pixel data compensation value on the single channel and the brightness gain is determined, so that the influence of the pixel data compensation value is considered when the brightness gain is determined, and the color cast caused by brightness compensation is reduced, or the color cast still existing after brightness compensation is reduced; determining a pixel data compensation value of a sampling point in the display panel on a single channel, wherein the pixel data compensation value has a first brightness gain of a mapping relation; and determining the brightness gain of the pixel point of the display panel on the target channel according to the first brightness gain, wherein the brightness gain can be used for performing color cast compensation on the display panel so as to reduce color cast of the display panel.

Description

Color cast compensation method and device, electronic equipment and storage medium
Technical Field
The disclosure relates to the technical field of display, and in particular relates to a color cast compensation method and device, electronic equipment and a storage medium.
Background
In the field of display technology, research into display devices has been a major focus of this field, particularly for display panels.
The display panel is generally prone to a problem of uneven display brightness. The problem of luminance unevenness is generally eliminated by performing luminance compensation on the display panel.
However, color shift of the display panel is often caused. Moreover, due to the difference of color luminescent materials and the limitation of the manufacturing process of the display panel, the problem of color cast of the display panel can be caused, and the qualification rate of the display panel is reduced.
Disclosure of Invention
In view of this, the present disclosure proposes a solution for color cast compensation. The color cast problem of the display panel can be effectively reduced through the display panel display device, the display accuracy of the display panel is improved, and the qualification rate of the display panel is further improved.
According to an aspect of the present disclosure, there is provided a method of color cast compensation, the method including:
obtaining pixel data compensation values of a plurality of pixel points of a display panel in at least one channel, wherein the pixel data compensation values are used for eliminating uneven brightness of the display panel;
determining the mapping relation between the pixel data compensation value and the brightness gain on a single channel according to a plurality of pixel data compensation values in the single channel;
Determining a first brightness gain with the mapping relation between the pixel data compensation value of the sampling point on a single channel and the pixel data compensation value of the sampling point, wherein the sampling point is a plurality of pixel points predetermined on the display panel;
according to a plurality of first brightness gains in a target channel, determining brightness gains of pixel points of the display panel on the target channel; the target channel is any one or more channels of the display panel, and the brightness gain is used for performing color cast compensation on the display panel.
In one possible implementation manner, the determining the brightness gain of the pixel point of the display panel on the target channel according to the plurality of first brightness gains in the target channel includes:
dividing the display panel into a plurality of first areas according to the sampling points;
and determining the brightness gain of the pixel points except the sampling points in the first area on the target channel according to the first brightness gain of the sampling points in the first area on the target channel.
In one possible implementation manner, the determining the first brightness gain having the mapping relation with the pixel data compensation value of the sampling point on the single channel includes:
Determining a second area by taking the sampling point as a center according to a preset range threshold;
determining an average value of pixel data compensation values of the pixel points in the second area as the pixel data compensation value of the sampling point in the second area;
and determining the brightness gain with the mapping relation with the pixel data compensation value of the sampling point in the second area as a first brightness gain corresponding to the pixel data compensation value of the sampling point.
In one possible implementation manner, the determining, according to the pixel data compensation values in the single channel, a mapping relationship between the pixel data compensation values and the brightness gain on the single channel includes:
determining a pixel data compensation value distribution in the single channel according to a plurality of pixel data compensation values in the single channel;
and debugging the display panel according to the pixel data compensation value distribution, and determining the mapping relation.
In one possible implementation manner, the determining a pixel data compensation value distribution in the single channel according to the plurality of pixel data compensation values in the single channel includes:
dividing the pixel data compensation value into a plurality of intervals according to the value of the pixel data compensation value for any channel;
And displaying the pixel data compensation values of which the values fall into the same interval in the same color for any channel, and generating a trend chart of the pixel data compensation values as the distribution of the pixel data compensation values in the single channel.
In one possible implementation manner, the debugging the display panel according to the pixel data compensation value distribution, and determining the mapping relationship includes:
selecting a plurality of key pixel data compensation values from the pixel data compensation values;
debugging the display panel, and determining a key brightness gain corresponding to the key pixel data compensation value;
and determining the mapping relation based on the key pixel data compensation value and the key brightness gain.
In one possible implementation manner, the debugging the display panel, determining a key brightness gain corresponding to the key pixel data compensation value, includes:
receiving a target key brightness gain corresponding to a target key pixel data compensation value input by a user when the display panel is in a display state, wherein the target key pixel data compensation value is at least one of the plurality of key pixel data compensation values;
Controlling the display panel to display according to the target key brightness gain;
the above-mentioned process is iteratively performed, and the target key brightness gain input by the user last time is used as the key brightness gain corresponding to the key pixel data compensation value.
According to another aspect of the present disclosure, there is provided an apparatus for color cast compensation, the apparatus including:
a pixel data compensation value obtaining unit, configured to obtain pixel data compensation values of a plurality of pixel points of a display panel in at least one channel, where the pixel data compensation values are used to eliminate luminance non-uniformity of the display panel;
a mapping relation determining unit, configured to determine a mapping relation between a pixel data compensation value and a brightness gain on a single channel according to a plurality of pixel data compensation values in the single channel;
the first brightness gain determining unit is used for determining a first brightness gain with the mapping relation between the first brightness gain and a pixel data compensation value of a sampling point on a single channel, wherein the sampling point is a plurality of pixel points predetermined on the display panel;
a brightness gain determining unit, configured to determine brightness gains of pixel points of the display panel on a target channel according to a plurality of first brightness gains in the target channel; the target channel is any one or more channels of the display panel, and the brightness gain is used for performing color cast compensation on the display panel.
In one possible implementation manner, the brightness gain determining unit includes:
a first area determining unit, configured to divide the display panel into a plurality of first areas according to the sampling points;
and the brightness gain determining subunit is used for determining the brightness gain of the pixel points except the sampling points in the first area on the target channel according to the first brightness gain of the sampling points in the first area on the target channel.
In one possible implementation manner, the first brightness gain determining unit includes:
a second region determining unit, configured to determine a second region with the sampling point as a center according to a preset range threshold;
a sampling point pixel data compensation value determining unit, configured to determine an average value of pixel data compensation values of pixel points in the second area as a pixel data compensation value of a sampling point in the second area;
and a first luminance gain determining unit configured to determine a luminance gain having the mapping relation with the pixel data compensation value of the sampling point in the second area as a first luminance gain corresponding to the pixel data compensation value of the sampling point.
In one possible implementation manner, the mapping relation determining unit includes:
A pixel data compensation value distribution determining unit configured to determine a pixel data compensation value distribution in the single channel based on a plurality of the pixel data compensation values in the single channel;
and the mapping relation determining subunit is used for debugging the display panel according to the pixel data compensation value distribution and determining the mapping relation.
In one possible implementation manner, the pixel data compensation value distribution determining unit includes:
a pixel data compensation value dividing unit, configured to divide, for any channel, the pixel data compensation value into a plurality of sections according to the value of the pixel data compensation value;
and the trend graph generating unit is used for displaying the pixel data compensation values with the values falling into the same interval in the same color for any channel, and generating a trend graph of the pixel data compensation values as the distribution of the pixel data compensation values in the single channel.
In a possible implementation manner, the mapping relation determining subunit is configured to:
selecting a plurality of key pixel data compensation values from the pixel data compensation values;
debugging the display panel, and determining a key brightness gain corresponding to the key pixel data compensation value;
And determining the mapping relation based on the key pixel data compensation value and the key brightness gain.
In one possible implementation manner, the debugging the display panel, determining a key brightness gain corresponding to the key pixel data compensation value, includes:
receiving a target key brightness gain corresponding to a target key pixel data compensation value input by a user when the display panel is in a display state, wherein the target key pixel data compensation value is at least one of the plurality of key pixel data compensation values;
controlling the display panel to display according to the target key brightness gain;
the above-mentioned process is iteratively performed, and the target key brightness gain input by the user last time is used as the key brightness gain corresponding to the key pixel data compensation value.
According to another aspect of the present disclosure, there is provided an electronic device including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to implement the above-described method when executing the instructions stored by the memory.
According to another aspect of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon computer program instructions, wherein the computer program instructions, when executed by a processor, implement the above-described method.
According to another aspect of the present disclosure, there is provided a computer program product comprising a computer readable code, or a non-transitory computer readable storage medium carrying computer readable code, which when run in a processor of an electronic device, performs the above method.
In the embodiment of the disclosure, firstly, a pixel data compensation value of a pixel in a display panel on a single channel is obtained, and according to the pixel data compensation value on the single channel, the mapping relation between the pixel data compensation value on the single channel and the brightness gain is determined, so that the influence of the pixel data compensation value is considered when the brightness gain is determined, and the color cast caused by brightness compensation is reduced, or the color cast still existing after brightness compensation is reduced; determining a pixel data compensation value of a sampling point in the display panel on a single channel, wherein the pixel data compensation value has a first brightness gain of a mapping relation; and determining the brightness gain of the pixel point of the display panel on the target channel according to the first brightness gain, wherein the brightness gain can be used for performing color cast compensation on the display panel so as to reduce color cast of the display panel.
The embodiment of the disclosure comprehensively considers the problem of uneven brightness of the display panel and the problem of color cast of the display panel, utilizes the pixel data compensation value to determine the brightness gain, reduces the interference of the pixel data compensation value on the brightness gain, better solves the problem of color cast caused by brightness compensation or the problem of color cast still existing after brightness compensation, and improves the qualification rate of the display panel. And on the basis of solving the problem of uneven brightness, the pixel data compensation value can be directly utilized to determine the brightness gain, so that the operation steps are reduced, and the efficiency of solving the color cast problem is improved.
In another aspect, the embodiment of the disclosure can directly determine the brightness gain of the display panel by using the same mapping relation aiming at the display panel produced by the raw materials of the same manufacturer or the raw materials of the same batch, and the mapping relation is not required to be determined every time, so that the efficiency of eliminating the color cast problem is improved.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 shows a flowchart of a method of color cast compensation according to an embodiment of the present disclosure.
Fig. 2 shows a schematic diagram of sampling points and a first region distribution according to an embodiment of the present disclosure.
Fig. 3 shows a schematic view of a second region according to an embodiment of the present disclosure.
Fig. 4 shows a schematic diagram of a mapping relationship according to an embodiment of the present disclosure.
Fig. 5 shows a block diagram of a color cast compensation device according to an embodiment of the present disclosure.
Fig. 6 illustrates a block diagram of an electronic device, according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the disclosure will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In the description of the present disclosure, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of A, B, C, and may mean including any one or more elements selected from the group consisting of A, B and C.
The display panel is generally prone to a problem of uneven display brightness. In view of this problem, the brightness compensation algorithm is generally used to compensate the brightness of the pixel points of each channel in the display panel, so that the display brightness of the display panel is more uniform.
Because of the differences of the process capability and the manufacturing technology of the display panel manufacturers, the brightness of the display panels produced by the different manufacturers is uneven, the display panels are different in form and degree, and the difference is large. Therefore, from the viewpoint of economic efficiency, it is a relatively economical solution for each manufacturer to fix a set of brightness compensation algorithms for each display panel produced. This is also a relatively general solution today.
However, in actual production, there may be a difference between raw materials provided by different suppliers or a difference between raw materials of different batches of the same raw material supplier, and if a fixed brightness compensation algorithm is used, although the problem of uneven display brightness of the display panel can be eliminated, the problem of color cast of the display panel may be generated.
In addition, the problem of color display still exists or is aggravated due to the difference of luminescent materials with different colors and the process difference in the generation process.
In summary, on one hand, the display panel itself has color cast problem, which may not be solved after brightness compensation; on the other hand, the display panel may have color cast problem after brightness compensation.
The color cast problem of the display panel greatly reduces the qualification rate of the display panel and increases the production cost of enterprises.
In view of the above, the present application provides a color shift compensation method, which can perform color shift compensation based on brightness compensation of a display panel, so as to eliminate the color shift problem of the display panel.
Fig. 1 shows a flowchart of a method of color cast compensation according to an embodiment of the present disclosure. As shown in fig. 1, the method includes:
s11, obtaining pixel data compensation values of a plurality of pixel points of a display panel in at least one channel, wherein the pixel data compensation values are used for eliminating uneven brightness of the display panel.
In general, for an area with uneven brightness on a display panel, brightness compensation can be performed on pixel points in the area by using a sub-channel to solve the problem of uneven brightness of the display panel. The pixels of the display panel may have respective pixel data, which is defined herein as raw pixel data. After performing the brightness compensation operation, the pixels of the display panel obtain compensated brightness in a single channel; new pixel data can be obtained from the compensated luminance obtained. The pixel data compensation value may be a compensation value of the pixel data after brightness compensation; the pixel data compensation value may be a difference between new pixel data and original pixel data in value.
The obtained pixel data compensation value will be used in the subsequent step to determine its mapping relation to the luminance gain.
The display panel may be a liquid crystal display panel, a micro light emitting diode display panel, a mini light emitting diode display panel, a quantum dot light emitting diode display panel, an organic light emitting diode display panel, or the like. The channel may be any one of red (R), green (G), and blue (B) channels.
S12, determining the mapping relation between the pixel data compensation value and the brightness gain on a single channel according to a plurality of pixel data compensation values in the single channel;
after the display panel is started, a state is shown in which the channels are superimposed together. When the image is not loaded, taking the color of the central area of the display panel as a reference color, and if the area except the central area is unchanged relative to the reference color, indicating that color cast does not occur; conversely, if the area other than the center area is changed from the reference color, it is indicated that the color shift problem occurs. Here, the central region of the display panel may be a region range preset centering on the geometric center of the display panel.
For example, after the display panel is started, in the case of not loading an image, the center area of the display panel is displayed as white, and if a non-white color appears in an area in the lower left corner of the display panel, this area indicates that a color cast problem appears in the lower left corner of the display panel.
To eliminate color cast of the display panel, luminance gain may be performed on pixels of the display panel in channels. Since the display panel has obtained the pixel data compensation value, color cast is caused by eliminating luminance unevenness, or color cast is not eliminated after luminance compensation. Therefore, the value of the luminance gain has a correlation with the pixel data compensation value, and the correlation can be expressed as a mapping relationship between the pixel data compensation value and the luminance gain. For a single channel, a mapping relationship can be obtained.
S13, determining a first brightness gain with the mapping relation with pixel data compensation values of sampling points on a single channel, wherein the sampling points are a plurality of pixel points predetermined on the display panel.
In the embodiment of the present disclosure, some pixel points may be selected in advance on the display panel, and these pixel points are defined as sampling points. The sampling points can be selected according to a certain space interval, so that the sampling points are distributed on the whole display panel.
The size of the space interval of sampling points at different positions can be properly adjusted according to the characteristics of the screen. For example, when the screen edge is rounded, the spatial interval of the sampling points in this area can be reduced, and the density of the sampling points can be increased. When the edges of the screen are right angles, a fixed space interval can be used to uniformly select sampling points on the display panel.
The embodiment of the disclosure can determine the first brightness gain of the sampling point in the single channel by using the mapping relation. For example, at a certain sampling point, there is a pixel data compensation value of 1 on the R channel, a pixel data compensation value of 2 on the G channel, and a pixel data compensation value of 3 on the B channel. By using the mapping relationship, it is possible to determine the luminance gain 1 corresponding to the pixel data compensation value 1, the luminance gain 2 corresponding to the pixel data compensation value 2, and the luminance gain 3 corresponding to the pixel data compensation value 3. Here, the luminance gain 1, the luminance gain 2, and the luminance gain 3 are collectively referred to as a first luminance gain.
S14, determining the brightness gains of the pixel points of the display panel on the target channel according to the first brightness gains in the target channel; the target channel is any one or more channels of the display panel, and the brightness gain is used for performing color cast compensation on the display panel.
In the embodiments of the present disclosure, any one or more channels in the display panel may be determined as the target channel.
In S13 a first luminance gain of the sample point on the target channel has been obtained. Further, the brightness gain of the pixel point in the display panel can be determined according to the first brightness gain of the sampling point. For example, the brightness gain of the pixels of the display panel except the sampling point can be determined by the first brightness gain of each sampling point. The brightness gain here may be used to color cast compensate the display panel.
The embodiment of the disclosure can adopt a nearest neighbor interpolation method to determine the brightness gain of the pixel point of the display panel according to the first brightness gain of the sampling point; or a bilinear interpolation method is adopted, the brightness gain of the pixel point of the display panel is determined according to the first brightness gain of the sampling point, and the like. The embodiments of the present disclosure do not limit the method of determining the brightness gain of the display panel pixels.
In the embodiment of the disclosure, firstly, a pixel data compensation value of a pixel in a display panel on a single channel is obtained, and a mapping relation between the pixel data compensation value and a brightness gain on the single channel is determined according to the pixel data compensation value on the single channel, so that the influence of the pixel data compensation value is considered when the brightness gain is determined, the color cast caused by brightness compensation is reduced, or the color cast existing before brightness compensation is reduced, and the color cast existing after brightness compensation is reduced; determining a pixel data compensation value of a sampling point in the display panel on a single channel, wherein the pixel data compensation value has a first brightness gain of a mapping relation; and determining the brightness gain of the pixel point of the display panel on the target channel according to the first brightness gain, wherein the brightness gain can be used for performing color cast compensation on the display panel so as to reduce color cast of the display panel.
Because the embodiment of the disclosure comprehensively considers the problem of uneven brightness of the display panel and the problem of color cast of the display panel, the pixel data compensation value is utilized to determine the brightness gain, so that not only is the interference of the pixel data compensation value on the brightness gain reduced, but also the color cast problem caused by brightness compensation is better solved, or the color cast problem existing before the brightness compensation and the color cast problem still existing after the brightness compensation is solved, and the qualification rate of the display panel is improved. And on the basis of solving the problem of uneven brightness, the pixel data compensation value can be directly utilized to determine the brightness gain, so that the operation steps are reduced, and the efficiency of solving the color cast problem is improved.
In another aspect, the embodiment of the disclosure can directly determine the brightness gain of the display panel by using the same mapping relation aiming at the display panel produced by the raw materials of the same manufacturer or the raw materials of the same batch, and the mapping relation is not required to be determined every time, so that the efficiency of eliminating the color cast problem is improved.
In one possible implementation manner, the determining the brightness gain of the pixel point of the display panel on the target channel according to the plurality of first brightness gains in the target channel includes: dividing the display panel into a plurality of first areas according to the sampling points; and determining the brightness gain of the pixel points except the sampling points in the first area on the target channel according to the first brightness gain of the sampling points in the first area on the target channel.
The embodiment of the disclosure can define a region surrounded by the sampling points as a first region; there are no other sampling points within the range of the first region, other than the sampling points used to determine the range of the first region. The range covered by the display panel may be composed of a plurality of adjacent first areas.
Illustratively, fig. 2 shows a schematic diagram of sampling points and a first region distribution according to an embodiment of the present disclosure.
As shown in fig. 2, the edges of the display panel are right angles, and the space intervals between the sampling points can be set to be equal, so that the sampling points can be uniformly distributed on the display panel, and the dots in fig. 2 schematically represent the sampling points. The area surrounded by the sampling points may be a first area. As shown, sample point a 11 、a 12 、a 21 、a 22 The enclosed area may be a first area. According to the embodiment of the disclosure, the brightness gain of each pixel point in the first area on a certain channel can be determined through the first brightness gain of the sampling point on the channel. By the same method, the brightness gain of the pixel points on the display panel except the sampling points on the channel can be determined.
Because the first brightness gain of each pixel point in the first area is related to the first brightness gain of the sampling point of the first area, the influence of the brightness gain of the pixel points outside the first area can be avoided, the probability of generating excessive accumulated errors is reduced, the color cast problem can be more accurately solved, and the display accuracy of the display panel is improved.
In one possible implementation manner, the determining the first brightness gain having the mapping relation with the pixel data compensation value of the sampling point on the single channel includes: determining a second area by taking the sampling point as a center according to a preset range threshold; determining an average value of pixel data compensation values of the pixel points in the second area as the pixel data compensation value of the sampling point in the second area; and determining the brightness gain with the mapping relation with the pixel data compensation value of the sampling point in the second area as a first brightness gain corresponding to the pixel data compensation value of the sampling point.
In the embodiment of the disclosure, a region range threshold may be preset, and a second region centered on the sampling point may be defined. The second region may be a regular pattern of circles, squares, etc.
For example, if the second region is circular, the radius length of the second region may be preset, and this radius length is taken as the region range threshold.
Illustratively, fig. 3 shows a schematic view of a second region according to an embodiment of the present disclosure. As shown in fig. 3, the second region is square. The side length of the second region may be set as the region range threshold. And determining a second area taking the sampling point as the center according to the side length.
The second region may include a plurality of pixel points. The embodiment of the disclosure may use an average value of pixel data compensation values of the pixel points in the second area as the pixel data compensation value of the sampling point in the second area. Since the mapping relationship has been determined in S12, by using the mapping relationship, the luminance gain corresponding to the pixel data compensation value of the sampling point can be determined, and the luminance gain is taken as the luminance gain of the sampling point.
Since the brightness of the sampling point to be compensated may have a large error, the pixel data compensation value of the sampling point itself may have a large error. Such an error may be expressed as a large difference between the pixel data compensation value of the sampling point and the pixel data compensation value of its surrounding pixels, so that the accuracy of the luminance gain of the subsequent determination of the sampling point may be reduced by directly using the pixel data compensation value of the sampling point. Therefore, in the embodiment of the present disclosure, the average value of the pixel data compensation values of the pixel points within the second area range is taken as the pixel data compensation value of the sampling point. In this way, the accuracy of the pixel data compensation value of the determined sampling point can be improved, and the accuracy of the luminance gain of the subsequent determined sampling point can be further improved.
In one possible implementation manner, the determining, according to the pixel data compensation values in the single channel, a mapping relationship between the pixel data compensation values and the brightness gain on the single channel includes: determining a pixel data compensation value distribution in the single channel according to a plurality of pixel data compensation values in the single channel; and debugging the display panel according to the pixel data compensation value distribution, and determining the mapping relation.
The pixels of the display panel have respective brightness values on the R channel, the G channel, and the B channel, respectively. For a single channel, there may be a difference in brightness of pixels of the display panel, so there may be a difference in raw pixel data of the pixels. When the problem of uneven brightness is eliminated, there may be a difference in brightness of the pixels of the display panel to be compensated on the R, G, and B channels, respectively, so new pixel data of the pixels may be different. In summary, there may be differences in pixel data compensation values on a single channel. Thus, the pixel data compensation values for pixels on a single channel may not be the same.
The luminance unevenness may occur in any one of the regions of the display panel, and pixel data compensation values of the regions on the display panel where the luminance unevenness occurs may be different from those of the regions adjacent thereto. Therefore, the difference of the pixel data compensation values between the regions on the display panel may exhibit a region distribution law, and may be represented by the distribution of the pixel data compensation values. For example, the pixel data compensation value may be divided into a plurality of levels of the pixel data compensation value according to the value of the pixel data compensation value, and the display panel may be divided into a plurality of regions, and the pixel data compensation value levels of the respective regions may be determined.
Since the pixel data compensation value distribution can intuitively represent the difference of the pixel data compensation values of different areas on the display panel, the brightness gain of the pixels can be set to debug the display panel by using the pixel data compensation value distribution. After the color cast problem is eliminated by debugging the display panel, the obtained current brightness gain is determined to be the brightness gain corresponding to the pixel data compensation value, and then the mapping relation is determined.
The pixel data compensation value distribution makes the difference of the pixel data compensation values be blocked, so that the difference of the pixel data compensation values in different areas on the display panel can be clearly and intuitively reflected, the process of debugging the display panel is simpler and more convenient, and the efficiency of determining the mapping relation can be improved.
In one possible implementation manner, the determining a pixel data compensation value distribution in the single channel according to the plurality of pixel data compensation values in the single channel includes: dividing the pixel data compensation value into a plurality of intervals according to the value of the pixel data compensation value for any channel; and displaying the pixel data compensation values of which the values fall into the same interval in the same color for any channel, and generating a trend chart of the pixel data compensation values as the distribution of the pixel data compensation values in the single channel.
Embodiments of the present disclosure may divide pixel data compensation values into a plurality of numerical intervals, such as: (- ++7 ], [ -6, -5], [ -4, -3], [ -2, -1],0, [1,2], [3,4], [5,6], [7, ++infinity ], then setting a single interval to correspond to a certain color, and transitioning the color corresponding to the interval from a cold color to a warm color as the value of the value interval changes from small to large.
TABLE 1
Numerical interval of pixel data compensation value Corresponding colors in trend graphs
(-∞，-7] Black color
[-6，-5] Purple (purple)
[-4，-3] Deep blue
[-2，-1] Light blue
0 White color
[1，2] Yellow colour
[3，4] Orange with a color of white
[5，6] Magenta red
[7，+∞] Red colour
Next, according to the pixel data compensation value of a single pixel of the display panel on a certain channel, determining the value interval to which the pixel data compensation value belongs, and further determining the color corresponding to the single pixel. Then, the display is performed in accordance with the corresponding color to generate a trend graph of the pixel data compensation values.
It can be easily seen from the trend graph that the magnitude of the pixel data compensation values on the display panel trend on a single channel. The larger the value of the pixel data compensation value, the more the color appearing on the trend chart is biased toward the warm tone. Conversely, the smaller the value of the pixel data compensation value, the more the color developed in the trend image is biased toward a cold hue. Moreover, the degree of the pixel data compensation value at each position of the display panel can be easily seen from the trend graph, so that a reference direction can be provided for subsequent debugging of the display panel, the debugging accuracy and efficiency are improved, and the mapping relation determining efficiency can be improved.
In one possible implementation manner, the debugging the display panel according to the pixel data compensation value distribution, and determining the mapping relationship includes: selecting a plurality of key pixel data compensation values from the pixel data compensation values; debugging the display panel, and determining a key brightness gain corresponding to the key pixel data compensation value; and determining the mapping relation based on the key pixel data compensation value and the key brightness gain.
The embodiments of the present disclosure may select a plurality of values within a range of values of the pixel data compensation values as the key pixel data compensation values. The value range of the pixel data compensation value may be a value range preset according to a normal condition, or may be a value range determined according to the pixel data compensation value of the current display panel.
For example, the key pixel data compensation value may be selected according to a certain value interval within the value range of the pixel data compensation value, or the pixel data compensation value histogram may be generated by the mr, different value intervals are set for different pixel data compensation value intervals according to the pixel data compensation value histogram, and the key pixel data compensation value is selected with different densities.
For example, since the pixel data compensation value of the sampling point is also within the value range of the pixel data compensation value, the pixel data compensation value of the sampling point may be regarded as the key pixel data compensation value.
The embodiments of the present disclosure do not limit the method for selecting the key pixel data compensation value.
And then, debugging the display panel, and determining the mapping relation according to the key pixel data compensation value and the key brightness gain currently corresponding to the key pixel data compensation value when the color cast problem is eliminated.
Fig. 4 shows a schematic diagram of a mapping relationship according to an embodiment of the present disclosure.
As shown in fig. 4, the embodiment of the present disclosure may determine that the pixel data compensation value has a value range of [ -10,8], and select 10 key pixel data compensation values according to a value interval of 2, which are respectively-10, -8, -6, -4, -2,0,2,4,6,8.
By debugging the display panel, the 10 key pixel data compensation values can each correspond to a key luminance gain with the color cast problem eliminated. In FIG. 4, the key luminance gains are shown as Gain_0-Gain_8. The key pixel data compensation value is-10 corresponding to gain_0, the key pixel data compensation value is-8 corresponding to gain_1 … …, the key pixel data compensation value is 4 or 6 corresponding to gain_7, and the key pixel data compensation value is 8 corresponding to gain_8.
Then, the brightness gain corresponding to the pixel data compensation value between every two key pixel data compensation values can be determined through an interpolation method, and the brightness gain corresponding to the pixel data compensation value outside the value range is determined, so that the mapping relation is determined.
The method for determining the brightness gain corresponding to the pixel data compensation value outside the value range is described below.
For example, the brightness gain corresponding to the pixel data compensation value having a value lower than the lower limit of the value range may be set to be the same as the brightness gain corresponding to the key pixel data compensation value of the lower limit of the value range; similarly, the brightness gain corresponding to the pixel data compensation value with the value higher than the upper limit of the value range can be set to be the same as the brightness gain corresponding to the key pixel data compensation value with the upper limit of the value range. For example: setting the brightness Gain corresponding to the pixel data compensation value with the value smaller than-10 as gain_0; and setting the brightness Gain corresponding to the pixel data compensation value with the value larger than 8 as gain_8.
For example, the extrapolation may be performed by using the brightness gain corresponding to the key pixel data compensation value at the lower limit of the range and the brightness gain corresponding to the key pixel data compensation value adjacent to the key pixel data compensation value at the lower limit of the range, and calculating the brightness gain corresponding to the pixel data compensation value having a value lower than the lower limit of the range; similarly, the extrapolation may be performed by using the luminance gain corresponding to the key pixel data compensation value at the upper limit of the value range and the luminance gain corresponding to the key pixel data compensation value adjacent to the key pixel data compensation value at the upper limit of the value range, and the luminance gain corresponding to the pixel data compensation value having a value higher than the upper limit of the value range is calculated. For example: extrapolation is carried out by utilizing Gain_0 and Gain_1, and brightness Gain corresponding to a pixel data compensation value with the value smaller than-10 is calculated; and (3) performing extrapolation by using Gain_7 and Gain_8, and calculating the brightness Gain corresponding to the pixel data compensation value with the value larger than 8.
The debugging of the display panel according to the embodiments of the present disclosure is for determining a key brightness gain corresponding to a key pixel data compensation value, not for obtaining a brightness gain of the entire display panel. Therefore, the process of debugging the panel is shortened, and the efficiency of determining the mapping relation is improved; in addition, the influence of errors generated in the debugging process on the determination of the mapping relation is reduced, and the accuracy of determining the mapping relation is improved.
In one possible implementation manner, the debugging the display panel, determining a key brightness gain corresponding to the key pixel data compensation value, includes: receiving a target key brightness gain corresponding to a target key pixel data compensation value input by a user when the display panel is in a display state, wherein the target key pixel data compensation value is at least one of the plurality of key pixel data compensation values; controlling the display panel to display according to the target key brightness gain; the above-mentioned process is iteratively performed, and the target key brightness gain input by the user last time is used as the key brightness gain corresponding to the key pixel data compensation value.
In the embodiment of the disclosure, when the display panel is in a display state, a user can visually perceive that the color cast problem occurs at the position of the display panel. For example, the display panel should be white, but may be displayed in a dark red color in the lower right corner, as there may be different combinations of pixel data compensation values for the three channels, resulting in a dark red color in the display panel. Therefore, the user can set the key brightness gain for the display panel by comparing the trend graphs of the three channels (R channel, G channel and B channel); after the display panel is subjected to brightness gain operation, the user again observes whether the display panel has eliminated the problem of color cast. And if the color cast problem is eliminated, determining a mapping relation by using the key pixel data compensation value and the key brightness gain corresponding to the key pixel data compensation value. If the color cast problem is not eliminated, the user can repeat the steps to debug the display panel until the color cast problem is eliminated.
Since the end user of the display panel also perceives the displayed picture through vision, the display panel can be debugged according to the user's vision, and the display panel thus debugged more accords with the vision of the end user of the display panel.
Fig. 5 shows a block diagram of a color cast compensation device according to an embodiment of the present disclosure. As shown in fig. 5, the apparatus 50 includes:
a pixel data compensation value obtaining unit 51, configured to obtain pixel data compensation values of a plurality of pixel points of a display panel in at least one channel, where the pixel data compensation values are used to eliminate luminance unevenness of the display panel;
a mapping relation determining unit 52, configured to determine a mapping relation between the pixel data compensation value and the brightness gain on the single channel according to a plurality of the pixel data compensation values in the single channel;
a first luminance gain determining unit 53, configured to determine a first luminance gain having the mapping relation with a pixel data compensation value of a sampling point on a single channel, where the sampling point is a plurality of pixel points predetermined on the display panel;
a brightness gain determining unit 54, configured to determine brightness gains of pixel points of the display panel on a target channel according to a plurality of the first brightness gains in the target channel; the target channel is any one or more channels of the display panel, and the brightness gain is used for performing color cast compensation on the display panel.
In one possible implementation manner, the brightness gain determining unit 54 includes:
a first area determining unit, configured to divide the display panel into a plurality of first areas according to the sampling points;
and the brightness gain determining subunit is used for determining the brightness gain of the pixel points except the sampling points in the first area on the target channel according to the first brightness gain of the sampling points in the first area on the target channel.
In one possible implementation manner, the first brightness gain determining unit 53 includes:
a second region determining unit, configured to determine a second region with the sampling point as a center according to a preset range threshold;
a sampling point pixel data compensation value determining unit, configured to determine an average value of pixel data compensation values of pixel points in the second area as a pixel data compensation value of a sampling point in the second area;
and a first luminance gain determining unit configured to determine a luminance gain having the mapping relation with the pixel data compensation value of the sampling point in the second area as a first luminance gain corresponding to the pixel data compensation value of the sampling point.
In one possible implementation, the mapping relation determining unit 52 includes:
A pixel data compensation value distribution determining unit configured to determine a pixel data compensation value distribution in the single channel based on a plurality of the pixel data compensation values in the single channel;
and the mapping relation determining subunit is used for debugging the display panel according to the pixel data compensation value distribution and determining the mapping relation.
In one possible implementation manner, the pixel data compensation value distribution determining unit includes:
a pixel data compensation value dividing unit, configured to divide, for any channel, the pixel data compensation value into a plurality of sections according to the value of the pixel data compensation value;
and the trend graph generating unit is used for displaying the pixel data compensation values with the values falling into the same interval in the same color for any channel, and generating a trend graph of the pixel data compensation values as the distribution of the pixel data compensation values in the single channel.
In a possible implementation manner, the mapping relation determining subunit is further configured to:
selecting a plurality of key pixel data compensation values from the pixel data compensation values;
debugging the display panel, and determining a key brightness gain corresponding to the key pixel data compensation value;
And determining the mapping relation based on the key pixel data compensation value and the key brightness gain.
In one possible implementation manner, the debugging the display panel, determining a key brightness gain corresponding to the key pixel data compensation value, includes:
receiving a target key brightness gain corresponding to a target key pixel data compensation value input by a user when the display panel is in a display state, wherein the target key pixel data compensation value is at least one of the plurality of key pixel data compensation values;
controlling the display panel to display according to the target key brightness gain;
the above-mentioned process is iteratively performed, and the target key brightness gain input by the user last time is used as the key brightness gain corresponding to the key pixel data compensation value.
The disclosed embodiments also provide a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the above-described method. The computer readable storage medium may be a volatile or nonvolatile computer readable storage medium.
Embodiments of the present disclosure also provide a computer program product comprising computer readable code, or a non-transitory computer readable storage medium carrying computer readable code, which when run in a processor of an electronic device, performs the above method.
The embodiment of the disclosure also provides an electronic device, which comprises: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to invoke the instructions stored in the memory to perform the above method.
Exemplary electronic devices in this embodiment include, but are not limited to, desktop computers, televisions, mobile devices with large-sized screens, such as cell phones, tablet computers, and other common electronic devices that require multiple chips to be cascaded to achieve driving.
The electronic device may also be a User Equipment (UE), a mobile device, a User terminal, a handheld device, a computing device, or a vehicle mounted device, and examples of some terminals are: a display, a Smart Phone or portable device, a Mobile Phone (Mobile Phone), a tablet, a notebook, a palm top, a Mobile internet device (Mobile Internetdevice, MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (Industrial Control), a wireless terminal in unmanned (self driving), a wireless terminal in teleoperation (Remote medical Surgery), a wireless terminal in Smart Grid (Smart Grid), a wireless terminal in transportation security (Transportation Safety), a wireless terminal in Smart City (Smart City), a wireless terminal in Smart Home (Smart Home), a wireless terminal in the internet of vehicles, and the like. For example, the server may be a local server or a cloud server.
Fig. 6 illustrates a block diagram of an electronic device 1900 according to an embodiment of the disclosure. For example, electronic device 1900 may be provided as a server or terminal device. Referring to FIG. 6, electronic device 1900 includes a processing component 1922 that further includes one or more processors and memory resources represented by memory 1932 for storing instructions, such as application programs, that can be executed by processing component 1922. The application programs stored in memory 1932 may include one or more modules each corresponding to a set of instructions. Further, processing component 1922 is configured to execute instructions to perform the methods described above.
The electronic device 1900 may also include a power component 1926 configured to perform power management of the electronic device 1900, a wired or wireless network interface 1950 configured to connect the electronic device 1900 to a network, and an input/output (I/O) interface 1958. The electronic device 1900 may operate based on an operating system stored in memory 1932, such as Windows Server, mac OS XTM, unixTM, linuxTM, freeBSDTM, or the like.
In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 1932, including computer program instructions executable by processing component 1922 of electronic device 1900 to perform the methods described above.
The foregoing is merely exemplary embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
It should be noted that, in this document, 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 phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (11)

1. A method of color cast compensation, comprising:
obtaining pixel data compensation values of a plurality of pixel points of a display panel in at least one channel, wherein the pixel data compensation values are used for eliminating uneven brightness of the display panel;
determining the mapping relation between the pixel data compensation value and the brightness gain on a single channel according to a plurality of pixel data compensation values in the single channel;
determining a first brightness gain with the mapping relation between the pixel data compensation value of the sampling point on a single channel and the pixel data compensation value of the sampling point, wherein the sampling point is a plurality of pixel points predetermined on the display panel;
According to a plurality of first brightness gains in a target channel, determining brightness gains of pixel points of the display panel on the target channel; the target channel is any one or more channels of the display panel, and the brightness gain is used for performing color cast compensation on the display panel.
2. The method of claim 1, wherein determining the brightness gain of the pixels of the display panel on the target channel based on the plurality of first brightness gains in the target channel comprises:
dividing the display panel into a plurality of first areas according to the sampling points;
and determining the brightness gain of the pixel points except the sampling points in the first area on the target channel according to the first brightness gain of the sampling points in the first area on the target channel.
3. The method of claim 1, wherein determining a first luminance gain having the mapping relationship with the pixel data compensation value of the sampling point on the single channel comprises:
determining a second area by taking the sampling point as a center according to a preset range threshold;
determining an average value of pixel data compensation values of the pixel points in the second area as the pixel data compensation value of the sampling point in the second area;
And determining the brightness gain with the mapping relation with the pixel data compensation value of the sampling point in the second area as a first brightness gain corresponding to the pixel data compensation value of the sampling point.
4. The method of claim 1, wherein determining the mapping of pixel data compensation values to luminance gains on a single channel based on a plurality of the pixel data compensation values in the single channel comprises:
determining a pixel data compensation value distribution in the single channel according to a plurality of pixel data compensation values in the single channel;
and debugging the display panel according to the pixel data compensation value distribution, and determining the mapping relation.
5. The method of claim 4, wherein said determining a distribution of pixel data compensation values in said single channel from a plurality of said pixel data compensation values in said single channel comprises:
dividing the pixel data compensation value into a plurality of intervals according to the value of the pixel data compensation value for any channel;
and displaying the pixel data compensation values of which the values fall into the same interval in the same color for any channel, and generating a trend chart of the pixel data compensation values as the distribution of the pixel data compensation values in the single channel.
6. The method of claim 2, wherein the debugging the display panel according to the pixel data compensation value distribution, determining the mapping relationship, comprises:
selecting a plurality of key pixel data compensation values from the pixel data compensation values;
debugging the display panel, and determining a key brightness gain corresponding to the key pixel data compensation value;
and determining the mapping relation based on the key pixel data compensation value and the key brightness gain.
7. The method of claim 6, wherein the debugging the display panel to determine a key brightness gain corresponding to the key pixel data compensation value comprises:
receiving a target key brightness gain corresponding to a target key pixel data compensation value input by a user when the display panel is in a display state, wherein the target key pixel data compensation value is at least one of the plurality of key pixel data compensation values;
controlling the display panel to display according to the target key brightness gain;
the above-mentioned process is iteratively performed, and the target key brightness gain input by the user last time is used as the key brightness gain corresponding to the key pixel data compensation value.
8. A display driving chip, comprising: a pixel data compensation value acquisition unit, a mapping relation determination unit, a first luminance gain determination unit, a luminance gain determination unit to execute a color cast compensation method, the method comprising:
obtaining pixel data compensation values of a plurality of pixel points of a display panel in at least one channel by using the pixel data compensation value obtaining unit, wherein the pixel data compensation values are used for eliminating uneven brightness of the display panel;
determining the mapping relation between the pixel data compensation value and the brightness gain on a single channel according to a plurality of pixel data compensation values in the single channel by using the mapping relation determining unit;
determining a first brightness gain with the mapping relation with a pixel data compensation value of a sampling point on a single channel by using the first brightness gain determining unit, wherein the sampling point is a plurality of pixel points predetermined on the display panel;
determining brightness gains of pixel points of the display panel on a target channel according to a plurality of first brightness gains in the target channel by using the brightness gain determining unit; the target channel is any one or more channels of the display panel, and the brightness gain is used for performing color cast compensation on the display panel.
9. A color cast compensation device, comprising: a display having the display driving chip of claim 8.
10. The color cast compensation device of claim 9 wherein the display is: at least one of micro light emitting diode display, sub millimeter light emitting diode display, quantum dot light emitting diode display, and organic light emitting diode display.
11. The color cast compensation device of claim 9, wherein the color cast compensation device is: at least one of a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer and a vehicle-mounted computer.
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