CN110827745B - Display panel and pixel compensation data generation method and device thereof - Google Patents
Display panel and pixel compensation data generation method and device thereof Download PDFInfo
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- 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
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Abstract
The invention discloses a display panel and a method and a device for generating pixel compensation data of the display panel. The method comprises the following steps: determining target requirements, wherein the target requirements are the color coordinate requirements and the brightness requirements of the white picture which meet the requirements; calculating the brightness reference values of the sub-pixels of at least three colors of the display panel according to the color coordinate requirement and the brightness requirement; determining a gray scale compensation value of the sub-pixel of the first color according to the brightness reference value corresponding to the sub-pixel of the first color; and determining the gray scale compensation value of the sub-pixel of the second color according to the brightness reference value corresponding to the sub-pixel of the second color, and taking the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color. According to the embodiment of the invention, the storage space required by the pixel compensation data can be reduced, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a method and a device for generating pixel compensation data of a display panel and the display panel.
Background
At present, after a display panel is manufactured, optical detection is usually performed, then a compensation gray scale value is set for each sub-pixel according to an optical detection result, preset compensation gray scale value data is stored in a memory, then, when the display panel normally works, the compensation gray scale value corresponding to each sub-pixel is read from the memory, original gray scale data of the sub-pixel is compensated according to the compensation gray scale value, driving of the sub-pixel is achieved according to the compensated gray scale value data, and therefore a display effect of a display picture is improved in a gray scale value compensation mode.
However, the conventional gray scale compensation data requires a large storage space, and thus the production cost is high.
Disclosure of Invention
The embodiment of the invention provides a method and a device for generating pixel compensation data of a display panel and the display panel, which can reduce the storage space required by the pixel compensation data and reduce the production cost.
In a first aspect, an embodiment of the present invention provides a method for generating pixel compensation data of a display panel, including:
determining target requirements, wherein the target requirements are the color coordinate requirements and the brightness requirements of the white picture which meet the requirements;
calculating the brightness reference values of the sub-pixels of at least three colors of the display panel according to the color coordinate requirement and the brightness requirement;
determining a gray scale compensation value of the sub-pixel of the first color according to the brightness reference value corresponding to the sub-pixel of the first color;
determining a gray scale compensation value of the sub-pixel of the second color according to the brightness reference value corresponding to the sub-pixel of the second color, and taking the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as a compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color;
the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color are used for generating the gray scale compensation value of the sub-pixel of the second color, the first color is any one of at least three colors, and the second color is any one of at least three colors except the first color.
In a second aspect, an embodiment of the present invention provides a pixel compensation data generating apparatus for a display panel, including:
the requirement determining module is used for determining a target requirement, wherein the target requirement is a color coordinate requirement and a brightness requirement of a white picture meeting requirements;
the luminance reference value determining module is used for calculating the luminance reference values of the sub-pixels of at least three colors of the display panel according to the color coordinate requirement and the luminance requirement;
the gray scale compensation value determining module is used for determining the gray scale compensation value of the sub-pixel of the first color according to the brightness reference value corresponding to the sub-pixel of the first color;
the compensation coefficient determining module is used for determining a gray scale compensation value of the sub-pixel of the second color according to the brightness reference value corresponding to the sub-pixel of the second color, and taking the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as a compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color;
the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color are used for generating the gray scale compensation value of the sub-pixel of the second color, the first color is any one of at least three colors, and the second color is any one of at least three colors except the first color.
In a third aspect, an embodiment of the invention provides a display panel, which includes a memory, in which the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color with respect to the sub-pixel of the first color are stored;
the display panel comprises at least three colors of sub-pixels, the first color is any one of the at least three colors, and the second color is any one of the at least three colors except the first color.
According to the pixel compensation data generation method of the display panel provided by the embodiment of the invention, the gray scale compensation value of the sub-pixel of the first color and the compensation coefficients of the sub-pixels of other colors in the display panel are generated, so that the generated gray scale compensation value of the sub-pixel of the first color and the compensation coefficients of the sub-pixels of other colors of the display panel are only required to be stored, the gray scale compensation value of the sub-pixel of each color can be avoided from being stored, the compensation data amount required to be stored is reduced, and the production cost of the display panel is reduced.
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Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
Fig. 1 is a flowchart illustrating a pixel compensation data generating method of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the light emission characteristics of each color sub-pixel of the display panel according to one embodiment of the present invention;
fig. 3 is a schematic structural diagram of a pixel compensation data generating apparatus of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, 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 phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Fig. 1 is a flowchart illustrating a method for generating pixel compensation data of a display panel according to an embodiment of the present invention. As shown in fig. 1, the method comprises the steps of:
and S10, determining target requirements, wherein the target requirements are the color coordinate requirements and the brightness requirements of the white picture meeting the requirements.
Since different customers have different requirements, in order to meet the customized requirements of different customers, when determining the compensation data of each sub-pixel of the display panel, a target requirement should be first determined, which is the color coordinate and brightness requirement of the white picture meeting the customer requirements.
And S20, calculating the brightness reference value of the sub-pixel of at least three colors of the display panel according to the color coordinate requirement and the brightness requirement.
Illustratively, the display panel may be an Organic Light Emitting Diode (OLED) display panel. Each pixel of the display panel may include at least three color sub-pixels. For example, each pixel of the display panel includes three color sub-pixels, namely a red sub-pixel, a green sub-pixel and a blue sub-pixel. The coordinates of the three color sub-pixels included in each pixel are the same as the coordinates of the pixel. For example, the coordinates of the pixel are (m, n), that is, the pixel is the pixel in the mth row and the nth column, and correspondingly, the coordinates of the red sub-pixel, the green sub-pixel and the blue sub-pixel included in the pixel are all (m, n).
In some embodiments, S20 may specifically include: performing gamma calibration on the display panel according to the color coordinate requirement and the brightness requirement, so that the color coordinate average value and the brightness average value of each pixel of the display panel after gamma calibration meet the color coordinate requirement and the brightness requirement; acquiring brightness values corresponding to sub-pixels of at least three colors in each pixel of the display panel after gamma calibration, and calculating an average value of the brightness values corresponding to the sub-pixels of each color in the at least three colors; the average value of the luminance values corresponding to the sub-pixels of each color is used as a luminance reference value of the sub-pixels of each color.
After the display panel is prepared, gamma calibration can be performed on the display panel according to the color coordinate requirement and the brightness requirement. The overall color coordinates and the overall brightness of the display panel after gamma calibration meet the color coordinate requirements and the brightness requirements. Here, the overall color coordinates of the display panel may be an average value of the color coordinates of each pixel of the display panel, and the overall luminance of the display panel may be an average value of the luminance of each pixel of the display panel. However, mura (display brightness non-uniformity) may still exist in the display panel after gamma calibration. The embodiment of the invention can generate the compensation data of each sub-pixel of the display panel after gamma calibration so as to finely adjust the display panel after gamma calibration, thereby further improving the display quality of the display panel.
Under the condition that the display panel meets the color coordinate requirement and the brightness requirement, the average value of the brightness values corresponding to the sub-pixels of each color is used as the brightness reference value of the sub-pixels of the corresponding color, and then the compensation data required by the sub-pixels of each color is determined based on the brightness reference value, so that the obtained compensation data required by the sub-pixels of each color is more accurate and better meets the actual requirements of customers.
And S30, determining the gray scale compensation value of the sub-pixel of the first color according to the brightness reference value corresponding to the sub-pixel of the first color.
The sub-pixel of the first color may be a sub-pixel of any one of at least three colors of sub-pixels of the display panel. Illustratively, the display panel includes three color sub-pixels, namely a red sub-pixel, a green sub-pixel and a blue sub-pixel. Applicants have found that, as shown in FIG. 2, curve 1 is the gray scale value and luminance correspondence of the green sub-pixel, curve 2 is the gray scale value and luminance correspondence of the red sub-pixel, and curve 3 is the gray scale value and luminance correspondence of the blue sub-pixel. The brightness of each color sub-pixel increases with the increase of the gray scale value, and the brightness value corresponding to the green sub-pixel is the maximum under the same gray scale value. It can be seen that the green sub-pixel is sensitive to the change of the gray level, and under the white frame, the green sub-pixel contributes most to the brightness.
Based on the above, the sub-pixel of the first color may be a green sub-pixel, and the green sub-pixel may be used as a reference sub-pixel, and the compensation gray-scale value of the green sub-pixel and the compensation coefficient of the sub-pixel of the other color with respect to the green sub-pixel are further calculated, so that the display quality of the display panel can be ensured while the compensation data amount is reduced.
In some embodiments, S30 may specifically include: adjusting the gray-scale value of the sub-pixel of the first color according to the brightness reference value corresponding to the sub-pixel of the first color, so that the actual brightness corresponding to the gray-scale value of the adjusted sub-pixel of the first color is in accordance with the brightness reference value corresponding to the sub-pixel of the first color; and determining the gray scale compensation value of the sub-pixel of the first color based on the difference between the gray scale value of the sub-pixel of the first color after adjustment and the gray scale value of the sub-pixel of the first color before adjustment.
Continuing with the example where the first color subpixel is a green subpixel. Illustratively, the gray scale value of the green sub-pixel is continuously adjusted, and the actual brightness value corresponding to the gray scale value of the adjusted green sub-pixel is obtained until the actual brightness value corresponding to the gray scale value of the adjusted green sub-pixel meets the brightness reference value corresponding to the green sub-pixel. Here, the actual luminance value corresponding to the adjusted gray-scale value of the green sub-pixel may be in accordance with the luminance reference value corresponding to the green sub-pixel, and a difference between the actual luminance value corresponding to the adjusted gray-scale value of the green sub-pixel and the luminance reference value corresponding to the green sub-pixel may be within a preset range.
Illustratively, the display panel has m rows and n columns of pixels, each pixel including a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Correspondingly, the display panel has m rows and n columns of green sub-pixels, and the gray scale compensation value of the green sub-pixels shown in table 1 is calculated.
TABLE 1
| G11 | G12 | G13 | … | G1n |
| G21 | G22 | G23 | … | G2n |
| G31 | G32 | G33 | … | G3n |
| … | … | … | … | … |
| Gm1 | Gm2 | Gm3 | … | Gmn |
In table 1, Gmn represents the gray scale compensation value of the nth row green sub-pixel. Further, when the compensation data of the green sub-pixel is stored, the coordinate information of the green sub-pixel and the gray scale compensation value corresponding to the coordinate may be stored.
And S40, determining the gray scale compensation value of the sub-pixel of the second color according to the brightness reference value corresponding to the sub-pixel of the second color, and taking the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color.
For example, the sub-pixel of the second color may be a sub-pixel of any one color other than the sub-pixel of the first color among the sub-pixels of at least three colors included in the display panel. For example, the sub-pixel of the first color is a green sub-pixel, and the sub-pixel of the second color may be a red sub-pixel or a blue sub-pixel.
Exemplarily, the calculation formula (1) of the compensation coefficient of the red sub-pixel with respect to the green sub-pixel is as follows:
gain_Rmn＝Rmn/Gmn (1)
in the above formula (1), gain _ Rmn represents a compensation coefficient of the nth row and column of red sub-pixels with respect to the nth row and column of green sub-pixels, Rmn represents a gray scale compensation value of the nth row and column of red sub-pixels, and Gmn represents a gray scale compensation value of the nth row and column of green sub-pixels.
Illustratively, the compensation factor for the red sub-pixel versus the green sub-pixel is calculated as shown in table 2.
TABLE 2
| gain_R11 | gain_R12 | gain_R13 | … | gain_R1n |
| gain_R21 | gain_R22 | gain_R23 | … | gain_R2n |
| gain_R31 | gain_R32 | gain_R33 | … | gain_R3n |
| … | … | … | … | … |
| gain_Rm1 | gain_Rm2 | gain_Rm3 | … | gain_Rmn |
Further, when the compensation data of the red sub-pixel is stored, the coordinate information of the red sub-pixel and the compensation coefficient corresponding to the coordinate may be stored.
Exemplarily, the calculation formula (2) of the compensation coefficient of the blue sub-pixel with respect to the green sub-pixel is as follows:
gain_Bmn＝Bmn/Gmn (2)
in the above formula (2), gain _ Bmn represents a compensation coefficient of the nth row and column blue sub-pixel in the mth row relative to the nth column green sub-pixel in the mth row, Bmn represents a gray scale compensation value of the nth column blue sub-pixel in the mth row, and Gmn represents a gray scale compensation value of the nth column green sub-pixel in the mth row.
Illustratively, the compensation factor for the blue sub-pixel versus the green sub-pixel is calculated as shown in table 3.
TABLE 3
| gain_B11 | gain_B12 | gain_B13 | … | gain_B1n |
| gain_B21 | gain_B22 | gain_B23 | … | gain_B2n |
| gain_B31 | gain_B32 | gain_B33 | … | gain_B3n |
| … | … | … | … | … |
| gain_Bm1 | gain_Bm2 | gain_Bm3 | … | gain_Bmn |
Further, when the compensation data of the blue sub-pixel is stored, the coordinate information of the blue sub-pixel and the compensation coefficient corresponding to the coordinate may be stored.
In some embodiments, the step of determining the gray-scale compensation value of the sub-pixel of the second color according to the luminance reference value corresponding to the sub-pixel of the second color may specifically include: adjusting the gray-scale value of the sub-pixel of the second color according to the brightness reference value corresponding to the sub-pixel of the second color, so that the actual brightness corresponding to the gray-scale value of the adjusted sub-pixel of the second color is in accordance with the brightness reference value corresponding to the sub-pixel of the second color; and determining the gray scale compensation value of the sub-pixel of the second color based on the difference between the gray scale value of the sub-pixel of the second color after adjustment and the gray scale value of the sub-pixel of the second color before adjustment. Further, the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color is calculated, and the ratio is used as the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color.
The applicant finds that the storage space required by the gray scale compensation value of the sub-pixel is larger than that required by the compensation coefficient of the sub-pixel, and if the gray scale compensation value of the sub-pixel of each color is directly stored, the data size is larger, and the requirement on the size of the storage is higher.
According to the embodiment of the invention, the gray scale compensation value of the sub-pixel of the first color and the compensation coefficients of the sub-pixels of other colors in the display panel relative to the sub-pixel of the first color are generated, and then only the generated gray scale compensation value of the sub-pixel of the first color and the compensation coefficients of the sub-pixels of other colors in the display panel need to be stored, so that the gray scale compensation value of the sub-pixel of each color can be prevented from being stored, the compensation data amount needing to be stored is reduced, and the production cost of the display panel is reduced.
In some embodiments, the number of bits of the compensation coefficient may be 4 bits or 3 bits. The storage space required by the compensation coefficient is further reduced while the display quality of the display panel is ensured to be improved.
In some embodiments, when compensating for each color of the sub-pixels of the display panel, the gray scale compensation value of the first color sub-pixel may be directly provided to the corresponding first color sub-pixel. For the sub-pixel of the second color, the gray scale compensation value of the sub-pixel of the second color is generated according to the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color, and then the generated gray scale compensation value of the sub-pixel of the second color is provided to the corresponding sub-pixel of the second color.
In some embodiments, prior to S40, the method further comprises: judging whether the sub-pixel of the second color belongs to a non-color cast region; and if the sub-pixel of the second color belongs to the non-color-cast area, determining a compensation coefficient of the sub-pixel of the second color in the non-color-cast area relative to the sub-pixel of the first color according to the gray-scale value matching information of the sub-pixels of at least three colors in any pixel of the white picture of the display panel after gamma calibration.
For each pixel in the non-color cast region after gamma calibration, the gray-scale value matching information of the sub-pixels of at least three colors in the pixel is certain. For example, each pixel includes a red sub-pixel, a blue sub-pixel, and a green sub-pixel, and in each pixel in the non-color shifting region after gamma calibration, the gray scale ratio information of the red sub-pixel, the blue sub-pixel, and the green sub-pixel of each pixel is 1: 1: 1. and each pixel in the non-color cast region has no color cast phenomenon, and the gray scale compensation value of the sub-pixel of each color can be proportionally increased or decreased when being set so as to adjust the brightness of each pixel in the non-color cast region.
Based on this, the compensation coefficient for the red sub-pixel relative to the green sub-pixel in each pixel in the non-color-cast region is R _ global _ gain, which represents the ratio of the gray-scale value of the red sub-pixel relative to the green sub-pixel in any pixel under the white screen of the display panel after gamma calibration. It can be understood that the compensation coefficients of the plurality of red subpixels in the non-color-cast region are the same value, and thus only one compensation coefficient needs to be stored for the plurality of red subpixels in the non-color-cast region, thereby further reducing the storage space required by the compensation data.
Similarly, the compensation coefficient for the blue sub-pixel relative to the green sub-pixel in each pixel in the non-color-shift area is B _ global _ gain, which represents the ratio of the gray-scale values of the blue sub-pixel relative to the green sub-pixel in any pixel under the white screen of the display panel after gamma calibration. It can be understood that the compensation coefficients of the plurality of blue sub-pixels in the non-color-cast region are the same value, and thus only one compensation coefficient needs to be stored for the plurality of blue sub-pixels in the non-color-cast region, which further reduces the storage space required by the compensation data.
In some embodiments, at S40 may include: and determining the gray scale compensation value of the sub-pixel of the second color in any pixel in the color cast region of the display panel according to the brightness reference value corresponding to the sub-pixel of the second color, and taking the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as the compensation coefficient of all the sub-pixels of the second color relative to the sub-pixel of the first color in the color cast region.
In some embodiments, a color cast region may be a region that is cast a certain color overall. For example, a color shift region is blue overall, and correspondingly, the gray-scale adjustment range of each blue sub-pixel in the color shift region is larger than the gray-scale adjustment ranges of the red sub-pixel and the green sub-pixel. The applicant has found that the compensation coefficients of the sub-pixels of the second color with respect to the sub-pixels of the first color are equal in each pixel within the color shift region. Therefore, when calculating the compensation coefficient of the sub-pixel of the second color in the color cast region relative to the sub-pixel of the first color, only the gray scale compensation value of the sub-pixel of the second color in any one pixel in the color cast region can be determined, and then the ratio of the gray scale compensation value of the sub-pixel of the second color in the pixel to the gray scale compensation value of the sub-pixel of the first color is calculated, and the ratio is set as the compensation coefficient of all the sub-pixels of the second color in the color cast region.
According to the embodiment of the invention, only the compensation coefficient of the sub-pixel of the second color in the color cast region needs to be calculated, so that the calculation amount can be reduced. In addition, the compensation coefficients of the plurality of sub-pixels of the second color in the color cast region are the same value, and therefore only one compensation coefficient needs to be stored for the plurality of sub-pixels of the second color in the color cast region, and the storage space required by compensation data is further reduced.
Therefore, only the gray scale compensation value of the sub-pixel of the first color and the compensation coefficients of the sub-pixels of the other colors of the display panel need to be stored, so that the storage of the gray scale compensation value of the sub-pixel of each color can be avoided, the amount of compensation data required to be stored can be reduced, and the production cost of the display panel can be reduced.
An embodiment of the present invention further provides a device for generating pixel compensation data of a display panel, as shown in fig. 3, the device includes the following modules:
a requirement determining module 201, configured to determine a target requirement, where the target requirement is a color coordinate requirement and a brightness requirement of a white picture meeting requirements;
a luminance reference value determining module 202, configured to calculate luminance reference values of sub-pixels of at least three colors of the display panel according to the color coordinate requirement and the luminance requirement;
the gray scale compensation value determining module 203 is configured to determine a gray scale compensation value of the sub-pixel of the first color according to the luminance reference value corresponding to the sub-pixel of the first color;
a compensation coefficient determining module 204, configured to determine a gray scale compensation value of the sub-pixel of the second color according to the luminance reference value corresponding to the sub-pixel of the second color, and use a ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as a compensation coefficient of the sub-pixel of the second color with respect to the sub-pixel of the first color;
the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color are used for generating the gray scale compensation value of the sub-pixel of the second color, the first color is any one of at least three colors, and the second color is any one of at least three colors except the first color.
In some embodiments, the luminance reference value determination module 202 is specifically configured to:
performing gamma calibration on the display panel according to the color coordinate requirement and the brightness requirement, so that the color coordinate average value and the brightness average value of each pixel of the display panel after gamma calibration meet the color coordinate requirement and the brightness requirement;
acquiring brightness values corresponding to sub-pixels of at least three colors in each pixel of the display panel after gamma calibration, and calculating an average value of the brightness values corresponding to the sub-pixels of each color in the at least three colors;
and taking the average value of the brightness values corresponding to the sub-pixels of each color as the brightness reference value of the sub-pixels of each color.
In some embodiments, the gray compensation value determining module 203 is specifically configured to:
adjusting the gray-scale value of the sub-pixel of the first color according to the brightness reference value corresponding to the sub-pixel of the first color, so that the actual brightness corresponding to the adjusted gray-scale value of the sub-pixel of the first color meets the brightness reference value corresponding to the sub-pixel of the first color;
and determining a gray scale compensation value of the sub-pixel of the first color based on the difference between the adjusted gray scale value of the sub-pixel of the first color and the gray scale value of the sub-pixel of the first color before adjustment.
In some embodiments, the apparatus further includes a first determining unit and a non-color-cast region compensation coefficient determining unit, wherein the first determining unit is configured to determine whether the sub-pixel of the second color belongs to a non-color-cast region. If the sub-pixel of the second color belongs to the non-color-cast region, the non-color-cast region compensation coefficient determining unit is configured to determine a compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color in the non-color-cast region according to gamma-calibrated gray scale value matching information of the sub-pixel of at least three colors in any one pixel of a white image of the display panel.
In some embodiments, the compensation factor determining module 204 is specifically configured to:
and determining the gray scale compensation value of the sub-pixel of the second color in any pixel in the color cast region of the display panel according to the brightness reference value corresponding to the sub-pixel of the second color, and taking the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as the compensation coefficient of all the sub-pixels of the second color relative to the sub-pixel of the first color in the color cast region.
In some embodiments, the first color subpixel is a green subpixel.
In some embodiments, the number of bits of the compensation coefficient is 4 bits or 3 bits.
According to the pixel compensation data generation device of the display panel provided by the embodiment of the invention, the gray scale compensation value of the sub-pixel of the first color and the compensation coefficients of the sub-pixels of other colors in the display panel are generated, so that the generated gray scale compensation value of the sub-pixel of the first color and the compensation coefficients of the sub-pixels of other colors of the display panel are only required to be stored, the gray scale compensation value of the sub-pixel of each color can be avoided being stored, the compensation data amount required to be stored is reduced, and the production cost of the display panel is reduced.
An embodiment of the present invention further provides a display panel, as shown in fig. 4, the display panel 100 includes a memory. The memory stores the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color generated in any one of the above embodiments. The display panel comprises at least three colors of sub-pixels, the first color is any one of the at least three colors, and the second color is any one of the at least three colors except the first color.
In some embodiments, the display panel comprises a non-color-cast region and a color-cast region, and the compensation coefficient of the sub-pixel of the second color of the non-color-cast region relative to the sub-pixel of the first color is determined based on gray scale value matching information of the sub-pixels of at least three colors in any one pixel under a white picture of the display panel after gamma calibration; the compensation coefficient of the sub-pixel of the second color of the color cast region relative to the sub-pixel of the first color is determined based on the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color in any one pixel in the color cast region, and the compensation coefficients of the plurality of sub-pixels of the second color of the color cast region relative to the sub-pixel of the first color are the same.
According to the embodiment of the invention, the compensation coefficients of the plurality of sub-pixels of the second color in the non-color-cast region are the same value, and therefore, only one compensation coefficient needs to be stored for the plurality of sub-pixels of the second color in the non-color-cast region. Moreover, the compensation coefficients of the plurality of sub-pixels of the second color in the color cast region are the same value, and thus only one compensation coefficient needs to be stored for the plurality of sub-pixels of the second color in the color cast region. The memory space required for the compensation data can be further reduced.
In some embodiments, the compensation coefficient of all the sub-pixels of the second color with respect to the sub-pixels of the first color in the display panel is determined based on a ratio of the gray scale compensation value of the sub-pixels of the second color to the gray scale compensation value of the sub-pixels of the first color.
In some embodiments, the display panel further comprises a processor, the processor comprising a computing unit and a compensation unit;
the calculation unit is used for calculating the gray scale compensation value of the sub-pixel of the second color according to the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color;
the compensation unit is used for compensating the gray scale compensation value of the sub-pixel of the first color to the sub-pixel of the first color and compensating the gray scale compensation value of the sub-pixel of the second color to the sub-pixel of the second color.
In some embodiments, as shown in fig. 4, the display panel 100 has a display area AA and a non-display area NA, and the memory and the processor may be located in the non-display area NA of the display panel. In other embodiments, the memory and the processor may be integrated on the non-light-emitting side of the display panel 100 to reduce the occupied area of the non-display area NA and realize a narrow bezel.
In some embodiments, the first color subpixel is a green subpixel.
In some embodiments, the compensation factor corresponds to a 4-bit or 3-bit storage bit number.
Therefore, according to the display panel provided by the embodiment of the invention, the gray scale compensation value of the sub-pixel of the first color and the compensation coefficients of the sub-pixels of other colors in the display panel are stored, so that the storage of the gray scale compensation value of the sub-pixel of each color can be avoided, the compensation data amount required to be stored is reduced, and the production cost of the display panel is reduced.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (14)
1. A method for generating pixel compensation data of a display panel, comprising:
determining target requirements, wherein the target requirements are the color coordinate requirements and the brightness requirements of the white picture which meet the requirements;
calculating the brightness reference values of the sub-pixels of at least three colors of the display panel according to the color coordinate requirement and the brightness requirement;
determining a gray scale compensation value of the sub-pixel of the first color according to a brightness reference value corresponding to the sub-pixel of the first color;
determining a gray scale compensation value of the sub-pixel of the second color according to a brightness reference value corresponding to the sub-pixel of the second color, and taking the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as a compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color;
the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color are used for generating the gray scale compensation value of the sub-pixel of the second color, the first color is any one of the at least three colors, and the second color is any one of the at least three colors except for the first color.
2. The method according to claim 1, wherein the step of calculating the luminance reference values of the sub-pixels of at least three colors of the display panel according to the color coordinate requirement and the luminance requirement comprises:
performing gamma calibration on the display panel according to the color coordinate requirement and the brightness requirement, so that the color coordinate average value and the brightness average value of each pixel of the display panel after gamma calibration meet the color coordinate requirement and the brightness requirement;
acquiring brightness values corresponding to sub-pixels of at least three colors in each pixel of the display panel after gamma calibration, and calculating an average value of the brightness values corresponding to the sub-pixels of each color in the at least three colors;
and taking the average value of the brightness values corresponding to the sub-pixels of each color as the brightness reference value of the sub-pixels of each color.
3. The method according to claim 1, wherein the step of determining the gray scale compensation value of the sub-pixel of the first color according to the luminance reference value corresponding to the sub-pixel of the first color comprises:
adjusting the gray-scale value of the sub-pixel of the first color according to the brightness reference value corresponding to the sub-pixel of the first color, so that the actual brightness corresponding to the adjusted gray-scale value of the sub-pixel of the first color meets the brightness reference value corresponding to the sub-pixel of the first color;
and determining a gray scale compensation value of the sub-pixel of the first color based on the difference between the adjusted gray scale value of the sub-pixel of the first color and the gray scale value of the sub-pixel of the first color before adjustment.
4. The method according to claim 1, wherein before the step of determining the gray-scale compensation value of the sub-pixel of the second color according to the luminance reference value corresponding to the sub-pixel of the second color, the method further comprises:
judging whether the sub-pixel of the second color belongs to a non-color cast region;
if the sub-pixel of the second color belongs to the non-color-cast area, determining a compensation coefficient of the sub-pixel of the second color in the non-color-cast area relative to the sub-pixel of the first color according to gamma-calibrated gray-scale value matching information of the sub-pixels of at least three colors in any pixel of a white picture of the display panel.
5. The method according to claim 1, wherein the step of determining the gray scale compensation value of the sub-pixel of the second color according to the luminance reference value corresponding to the sub-pixel of the second color, and using the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as the compensation coefficient of the sub-pixel of the second color with respect to the sub-pixel of the first color comprises:
determining a gray scale compensation value of a sub-pixel of a second color in any pixel in a color cast region of the display panel according to a brightness reference value corresponding to the sub-pixel of the second color, and taking the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as a compensation coefficient of all the sub-pixels of the second color in the color cast region relative to the sub-pixel of the first color.
6. The method of any of claims 1-5, wherein the first color sub-pixel is a green sub-pixel.
7. The method according to any one of claims 1 to 5, wherein the compensation coefficient has a 4-bit or 3-bit number.
8. A pixel compensation data generating apparatus of a display panel, comprising:
the requirement determining module is used for determining target requirements, wherein the target requirements are the color coordinate requirements and the brightness requirements of the white picture which meet the requirements;
the brightness reference value determining module is used for calculating the brightness reference values of the sub-pixels of at least three colors of the display panel according to the color coordinate requirement and the brightness requirement;
the gray scale compensation value determining module is used for determining the gray scale compensation value of the sub-pixel of the first color according to the brightness reference value corresponding to the sub-pixel of the first color;
a compensation coefficient determining module, configured to determine a gray scale compensation value of the sub-pixel of the second color according to a luminance reference value corresponding to the sub-pixel of the second color, and use a ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color as a compensation coefficient of the sub-pixel of the second color with respect to the sub-pixel of the first color;
the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color are used for generating the gray scale compensation value of the sub-pixel of the second color, the first color is any one of the at least three colors, and the second color is any one of the at least three colors except for the first color.
9. The apparatus of claim 8, wherein the compensation factor determination module is further configured to:
judging whether the sub-pixel of the second color belongs to a non-color cast region;
if the sub-pixel of the second color belongs to the non-color-cast area, determining a compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color in the non-color-cast area according to gamma-calibrated gray scale value matching information of the sub-pixels of at least three colors in each pixel of the white picture of the display panel.
10. The apparatus of claim 8, wherein the compensation factor determination module is further configured to:
judging whether the sub-pixel of the second color belongs to a color cast area;
and if the sub-pixels of the second color belong to the color cast region, setting the values of the compensation coefficients of the plurality of sub-pixels of the second color in the color cast region to be the same value.
11. A display panel comprising a memory, wherein the memory stores the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color according to any one of claims 1 to 7;
the display panel comprises at least three colors of sub-pixels, the first color is any one of the at least three colors, and the second color is any one of the at least three colors except the first color.
12. The display panel according to claim 11, wherein the display panel comprises a non-color-shifting region and a color-shifting region, and a compensation coefficient of a sub-pixel of a second color of the non-color-shifting region with respect to a sub-pixel of the first color is determined based on gray scale matching information of sub-pixels of at least three colors in any pixel under a white screen of the display panel after gamma calibration;
the compensation coefficient of the sub-pixel of the second color of the color cast region relative to the sub-pixel of the first color is determined based on the ratio of the gray scale compensation value of the sub-pixel of the second color to the gray scale compensation value of the sub-pixel of the first color, and the compensation coefficients of the plurality of sub-pixels of the second color of the color cast region relative to the sub-pixel of the first color are the same.
13. The display panel of claim 11, wherein the compensation factor for all the sub-pixels of the second color with respect to the sub-pixels of the first color in the display panel is determined based on a ratio of the gray scale compensation value for the sub-pixels of the second color to the gray scale compensation value for the sub-pixels of the first color.
14. The display panel of claim 11, wherein the display panel further comprises a processor, the processor comprising a computing unit and a compensation unit;
the calculation unit is used for calculating the gray scale compensation value of the sub-pixel of the second color according to the gray scale compensation value of the sub-pixel of the first color and the compensation coefficient of the sub-pixel of the second color relative to the sub-pixel of the first color;
the compensation unit is used for compensating the gray scale compensation value of the sub-pixel of the first color to the sub-pixel of the first color and compensating the gray scale compensation value of the sub-pixel of the second color to the sub-pixel of the second color.
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| CN112701138B (en) * | 2020-12-25 | 2022-09-02 | 湖北长江新型显示产业创新中心有限公司 | Display panel, preparation method thereof and display device |
| CN113129813B (en) * | 2021-04-23 | 2022-04-22 | 利亚德光电股份有限公司 | White balance adjusting method and device and computer equipment |
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| CN115101026B (en) * | 2022-07-13 | 2023-09-08 | 北京欧铼德微电子技术有限公司 | Color cast compensation method and device, electronic equipment and storage medium |
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