CN111312166B - Display panel compensation method, display panel and display device - Google Patents

Display panel compensation method, display panel and display device Download PDF

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CN111312166B
CN111312166B CN202010117243.9A CN202010117243A CN111312166B CN 111312166 B CN111312166 B CN 111312166B CN 202010117243 A CN202010117243 A CN 202010117243A CN 111312166 B CN111312166 B CN 111312166B
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gray scale
bit
gray
bit gray
value
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CN111312166A (en
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黑亚君
王广
周井雄
周瑞渊
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/22Control 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
    • G09G3/30Control 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
    • G09G3/32Control 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]
    • G09G3/3208Control 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]

Abstract

The invention provides a compensation method of a display panel, the display panel and a display deviceThe device comprises: establishing a gray-scale value brightness mapping rule between m-bit gray scale and n-bit gray scale, wherein the gray-scale value brightness mapping rule comprises a brightness corresponding relation between the m-bit gray scale and the n-bit gray scale, the m bits are data bit width corresponding to preset image data of monochrome pixels in the display panel, and the n-bit gray scale comprises 2nA gray scale value, m bits of gray scale including 2mThe maximum brightness corresponding to m-bit gray scale is the same as the maximum brightness corresponding to n-bit gray scale, m and n are positive integers, and m is smaller than n; acquiring preset image data; determining a first gray scale value in m-bit gray scales corresponding to preset image data; determining a second gray scale value in the n-bit gray scale corresponding to the preset image data according to the gray scale value brightness mapping rule; compensating a second gray scale value in the n-bit gray scale; and lighting the monochrome pixel according to the second gray scale value in the compensated n-bit gray scale.

Description

Display panel compensation method, display panel and display device
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a compensation method for a display panel, and a display device.
[ background of the invention ]
Organic Light Emitting Display (OLED) is considered as the third generation Display technology following Liquid Crystal Display (LCD) panel by its advantages of lightness, thinness, active Light emission, fast response speed, wide viewing angle, rich colors, high brightness, low power consumption, high and low temperature resistance, etc.
FIG. 1A is a schematic diagram of a display panel in the prior art; fig. 1B is a schematic view of a display panel in the prior art.
As shown in fig. 1A and 1B, in the prior art, the display panel P includes a plurality of rows and columns of red pixels R, green pixels G, and blue pixels B. The red pixel R, the green pixel G or the blue pixel B are displayed on the gray scale of 0 to 255. For example, row 1, column 1 red pixels R are displayed at 3 gray levels. The row 1, column 1 green pixels G are displayed at gray level 2. The 1 st row and 1 st column blue pixels B are displayed at 1 gray level. The gray levels from 0 to 255 of the red pixel R, the green pixel G or the blue pixel B correspond to 256 kinds of brightness. In general, the display panel P has a display defect (Mura) on a screen before shipment. The display defects of the display panel P are eliminated by compensation before shipment. For example, all the red pixels R are displayed at 3 gray levels. Most normal red pixels R have the same brightness at 3 gray levels. The brightness of the few abnormal red pixels R is high or low at 3 gray levels. The abnormal red pixel R is changed from 3 gray scales to other gray scales after compensation, so that the brightness of the abnormal red pixel R meets the requirement, namely the conventional mura compensation can only compensate an integral number of gray scales. However, the abnormal pixel can be compensated to the luminance corresponding to any gray scale value from 0 gray scale to 255 gray scale after compensation. The abnormal pixels cannot be changed to more gray levels after compensation. The luminance of the abnormal pixels changed to one of the 0 gray level to the 255 gray level after compensation may still be high or low. Thus, the compensation effect of the display panel P is not good.
[ summary of the invention ]
In order to solve the above technical problems, the present invention provides a compensation method for a display panel, a display panel and a display device.
A first aspect of the present invention provides a compensation method for a display panel, including:
establishing a gray-scale value brightness mapping rule between m-bit gray scales and n-bit gray scales, wherein the gray-scale value brightness mapping rule comprises a brightness corresponding relation between the m-bit gray scales and the n-bit gray scales, the m bits are data bit widths corresponding to preset image data of monochrome pixels in the display panel, and the n-bit gray scales comprise 2nA gray scale value, the m-bit gray scale including 2mThe maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale, m and n are positive integers, and m is smaller than n;
acquiring the preset image data;
determining a first gray scale value in the m-bit gray scale corresponding to the preset image data;
determining a second gray scale value in the n-bit gray scale corresponding to the preset image data according to the gray scale value brightness mapping rule;
compensating a second gray scale value in the n-bit gray scale;
lighting the monochrome pixel according to a second gray scale value of the compensated n-bit gray scales.
A second aspect of the present invention provides a display panel, comprising a mapping module, an obtaining module, a processing module, a compensating module, a lighting module and a plurality of monochrome pixels;
the mapping module establishes a gray-scale value brightness mapping rule between an m-bit gray scale and an n-bit gray scale, wherein the gray-scale value brightness mapping rule comprises a brightness corresponding relation between the m-bit gray scale and the n-bit gray scale, the m bits are data bit widths corresponding to preset image data of the monochrome pixels in the display panel, and the n-bit gray scale comprises 2nA gray scale value, the m-bit gray scale including 2mThe maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale, m and n are positive integers, and m is smaller than n;
the acquisition module acquires the preset image data;
the processing module determines a first gray scale value in the m-bit gray scale corresponding to the preset image data;
the processing module determines a second gray scale value in the n-bit gray scale corresponding to the preset image data according to the gray scale value brightness mapping rule;
the compensation module compensates a second gray scale value in the n-bit gray scale;
the lighting module lights the monochrome pixel according to a second gray scale value in the compensated n-bit gray scale.
A third aspect of the invention provides a display device comprising the display panel.
In the present invention, the gray-scale value luminance mapping rule between the m-bit gray scale and the n-bit gray scale includes a luminance correspondence between the m-bit gray scale and the n-bit gray scale. 2 included in n-bit gray scalenA gray scale value of more than 2 included in m-bit gray scalemAnd (4) gray scale values. 2 of m-bit gray levelsmOne gray level value and 2 of n-bit gray levelsmThe gray scale values correspond one to one. n ratioOther 2 in the extra gray leveln-mIndividual gray scale value and 2 of m-bit gray scalemThe individual gray scale values do not correspond. Wherein, the first gray scale value in the m-bit gray scale corresponds to the second gray scale value in the n-bit gray scale before compensation. The compensated value range of the second gray scale value in the n-bit gray scale is 2 in the n-bit gray scalenRange of gray scale values. The compensated second gray scale value in the n-bit gray scale has brightness higher than 2 in the m-bit gray scalemBrightness corresponding to each gray scale value. Meanwhile, the maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale. The minimum brightness corresponding to the m-bit gray scale is the same as the minimum brightness corresponding to the n-bit gray scale. Thus, the accuracy of compensating for the second gray scale value in the n-bit gray scale is better than the accuracy of compensating for the first gray scale value in the m-bit gray scale.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1A is a schematic diagram of a display panel in the prior art;
FIG. 1B is a schematic diagram of a display panel in the prior art;
FIG. 2 is a flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating preset image data in a display panel according to an embodiment of the invention;
FIG. 5 is a diagram illustrating a gray scale luminance mapping rule in a display panel according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a first gray scale value of a display panel according to an embodiment of the invention;
FIG. 7 is a diagram illustrating second gray-scale values before compensation in a display panel according to an embodiment of the invention;
FIG. 8 is a diagram illustrating a compensated second gray scale value of a display panel according to an embodiment of the present invention;
FIG. 9 is a flowchart illustrating a compensation method for a display panel according to another embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a display compensation apparatus according to an embodiment of the present invention;
FIG. 11 is a flowchart illustrating a compensation method for a display panel according to another embodiment of the present invention;
FIG. 12 is a graph illustrating the luminance of a display panel and a second gray level value of n-bit compensated gray levels according to another embodiment of the present invention;
FIG. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 14 is a block diagram of another display panel according to another embodiment of the present invention;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used herein to describe devices in accordance with embodiments of the present invention, these devices should not be limited by these terms. These terms are only used to distinguish one device from another. For example, a first device may also be referred to as a second device, and similarly, a second device may also be referred to as a first device, without departing from the scope of embodiments of the present invention.
The embodiment of the invention provides a compensation method of a display panel, the display panel and a display device.
FIG. 2 is a flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention; FIG. 4 is a diagram illustrating preset image data in a display panel according to an embodiment of the invention; FIG. 5 is a diagram illustrating a gray scale luminance mapping rule in a display panel according to an embodiment of the present invention; FIG. 6 is a diagram illustrating a first gray scale value of a display panel according to an embodiment of the invention; FIG. 7 is a diagram illustrating second gray-scale values before compensation in a display panel according to an embodiment of the invention; FIG. 8 is a diagram illustrating a compensated second gray scale value in a display panel according to an embodiment of the invention.
As shown in fig. 2 to 8, the compensation method 1 for a display panel includes steps S10 to S60.
Step S10, establishing a gray scale value luminance mapping rule between m-bit gray scales and n-bit gray scales, where the gray scale value luminance mapping rule includes a luminance correspondence between the m-bit gray scales and the n-bit gray scales, the m bits are data bit widths corresponding to preset image data PIC of a monochrome pixel PIX in the display panel 2, and the n-bit gray scales include 2nA gray scale value, m bits of gray scale including 2mAnd according to the gray scale value, the maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale, m and n are positive integers, and m is smaller than n.
The display panel 2 includes M rows and N columns of monochrome pixels PIX. M, N are all positive integers. The row 1 to row M monochrome pixels PIX are sequentially disposed in the first direction D1 and extend in the second direction D2, respectively. The 1 st column to the nth column of monochrome pixels PIX are sequentially disposed in the second direction D2 and extend in the first direction D1, respectively. The first direction D1 and the second direction D2 intersect.
The n-bit gray scale includes 2nA gray scale value, m bits of gray scale including 2mAnd (4) gray scale values. The number of bits of the n-bit gray scale is greater than the number of bits of the m-bit gray scale. The maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale. For example, the m-bit gray scale is an 8-bit gray scale. The 8-bit gray scale includes 0 gray scale to 255 gray scale. The n-bit gray scale is a 9-bit gray scale. The 9-bit gray levels include gray levels 0 to 511. The brightness corresponding to the 0 gray scale to the 255 gray scale in the 8-bit gray scale is increased in sequence. The brightness corresponding to the 0 gray scale to the 511 gray scale in the 9-bit gray scale is increased in sequence. The brightness corresponding to the 0 gray scale in the 8-bit gray scale is equal to the brightness corresponding to the 0 gray scale in the 9-bit gray scale. The luminance corresponding to the 255 gray level of the 8-bit gray level is equal to the luminance corresponding to the 511 gray level of the 9-bit gray level.
The gray scale value luminance mapping rule between the m-bit gray scale and the n-bit gray scale includes a luminance correspondence between the m-bit gray scale and the n-bit gray scale. For example, the gray-scale value luminance mapping rule between the 8-bit gray scale and the 9-bit gray scale includes the luminance correspondence between the 8-bit gray scale and the 9-bit gray scale. The brightness corresponding to one of the 0 gray scale to the 64 gray scale in the 8-bit gray scale is equal to the brightness corresponding to one of the 0 gray scale to the 256 gray scale in the 9-bit gray scale. For example, the luminance corresponding to the 0 gray level among the 8-bit gray levels is equal to the luminance corresponding to the 0 gray level among the 9-bit gray levels. The brightness corresponding to the 1 gray scale of the 8-bit gray scale is equal to the brightness corresponding to the 4 gray scale of the 9-bit gray scale. The brightness corresponding to the 2 gray levels of the 8-bit gray levels is equal to the brightness corresponding to the 8 gray levels of the 9-bit gray levels. The brightness corresponding to the 64 gray levels of the 8-bit gray levels is equal to the brightness corresponding to the 256 gray levels of the 9-bit gray levels. The brightness corresponding to one of the 65-128 gray levels in the 8-bit gray levels is equal to the brightness corresponding to one of the 258-384 gray levels in the 9-bit gray levels. For example, the luminance corresponding to the gray level of 65 out of the gray levels of 8 bits is equal to the luminance corresponding to the gray level of 258 out of the gray levels of 9 bits. The brightness corresponding to the gray level of 66 bits in the gray level of 8 bits is equal to the brightness corresponding to the gray level of 260 bits in the gray level of 9 bits. The luminance corresponding to the 128 gray level of the 8-bit gray level is equal to the luminance corresponding to the 384 gray level of the 9-bit gray level. The brightness corresponding to one of the 129-255 gray levels in the 8-bit gray levels is equal to the brightness corresponding to one of the 385-511 gray levels in the 9-bit gray levels. For example, the luminance corresponding to the 129 gray level of the 8-bit gray level is equal to the luminance corresponding to the 385 gray level of the 9-bit gray level. The brightness corresponding to the 130 gray levels in the 8-bit gray levels is equal to the brightness corresponding to the 386 gray levels in the 9-bit gray levels. The luminance corresponding to the 255 gray level of the 8-bit gray level is equal to the luminance corresponding to the 511 gray level of the 9-bit gray level.
The m bits are data bit widths corresponding to preset image data PIC of the monochrome pixels PIX in the display panel 2. The preset image data PIC of the monochrome pixels PIX in the display panel 2 is binary data. And presetting the data bit width corresponding to the image data PIC as the bit number of binary data. For example, the m-bit gray scale is an 8-bit gray scale. The preset image data PIC is 8-bit binary data. Presetting 2 of image data PIC8The binary data corresponds to the gray levels 0 to 255 of the 8-bit gray levels one by one.
In step S20, preset image data PIC is acquired.
The display panel 2 includes M rows and N columns of monochrome pixels PIX. M rows and N columns of monochrome pixels PIX correspond to M × N pieces of preset image data PIC. For example, the 1 st row and 1 st column monochrome pixels PIX correspond to one preset image data PIC. The 1 st row and 2 nd column monochrome pixels PIX correspond to a preset image data PIC. The 2 nd row and 1 column monochrome pixels PIX correspond to a preset image data PIC. The M-th row and the N-th column of monochrome pixels PIX correspond to preset image data PIC.
In step S30, a first gray scale value of m-bit gray scales corresponding to the preset image data PIC is determined.
After preset image data PIC of the M rows and N columns of monochrome pixels PIX are sequentially obtained, first gray scale values in M-bit gray scales corresponding to the M rows and N columns of monochrome pixels PIX are sequentially determined. For example, the preset image data PIC of the 1 st row and 1 st column monochrome pixels PIX corresponds to 1 gray level among 8-bit gray levels. The preset image data PIC of the 1 st row and the 2 nd column of the monochrome pixels PIX corresponds to 2 gray levels in 8-bit gray levels. The preset image data PIC of the row 2 and column 1 monochrome pixels PIX corresponds to 65 gray levels of 8-bit gray levels. The preset image data PIC of the M-th row and N-th column of monochrome pixels PIX corresponds to 66 gray levels among 8-bit gray levels.
Step S40, determining a second gray scale value of the n-bit gray scale corresponding to the preset image data PIC according to the gray scale value luminance mapping rule.
After the preset image data PIC of the M rows and N columns of monochrome pixels PIX are sequentially determined corresponding to the first gray scale value in the M-bit gray scale, the preset image data PIC of the M rows and N columns of monochrome pixels PIX are sequentially determined corresponding to the second gray scale value in the N-bit gray scale before compensation. For example, the preset image data PIC of the 1 st row and 1 st column monochrome pixels PIX corresponds to 1 gray level among 8-bit gray levels. According to the gray scale value and brightness mapping rule, 1 gray scale in 8-bit gray scale corresponds to 4 gray scale in 9-bit gray scale. The preset image data PIC of the 1 st row and 1 st column monochrome pixels PIX corresponds to 4 gray levels among 9 bit gray levels. The preset image data PIC of the 1 st row and the 2 nd column of the monochrome pixels PIX corresponds to 2 gray levels in 8-bit gray levels. According to the gray scale value brightness mapping rule, 2 gray scales in 8-bit gray scales correspond to 8 gray scales in 9-bit gray scales. The preset image data PIC of the 1 st row and 2 nd column monochrome pixels PIX corresponds to 8 gray levels among 9 bit gray levels. The preset image data PIC of the row 2 and column 1 monochrome pixels PIX corresponds to 65 gray levels of 8-bit gray levels. According to the gray scale value luminance mapping rule, 65 gray scales of 8-bit gray scales correspond to 258 gray scales of 9-bit gray scales. The preset image data PIC of the row 2 and the column 1 monochrome pixels PIX corresponds to 258 gray scales in 9-bit gray scales. The preset image data PIC of the M-th row and N-th column of monochrome pixels PIX corresponds to 66 gray levels among 8-bit gray levels. According to the gray scale value luminance mapping rule, 66 gray scales of 8-bit gray scales correspond to 260 gray scales of 9-bit gray scales. The preset image data PIC of the M-th row and the N-th column of the monochrome pixels PIX corresponds to 260 gray scales in 9-bit gray scales. Wherein, the 4 gray scale, 8 gray scale, 258 gray scale and 260 gray scale in the 9-bit gray scale are the second gray scale value in the n-bit gray scale before compensation.
In step S50, a second gray scale value of the n-bit gray scales is compensated.
After the second gray scale values in the N-bit gray scales before compensation corresponding to the N rows of the M monochromatic pixels PIX are sequentially determined, the second gray scale values in the N-bit gray scales after compensation corresponding to the N rows of the M monochromatic pixels PIX are sequentially determined. M rows and N columns of single-color pixels PIX have N-bit gray scale after compensationThe second gray scale value of (1). The second gray scale value in the compensated n-bit gray scale can be 2 in the n-bit gray scalenOne of the gray scale values. For example, the second gray scale value in the n-bit gray scale before compensation corresponding to the 1 st row and 1 st column monochrome pixel PIX in the 1 st row is determined as the 4 gray scale in the 9-bit gray scale. However, the luminance of the 1 st row and 1 st column monochrome pixel PIX at the 4-gray scale of the 9-bit gray scale is larger than the average luminance of all the monochrome pixels PIX at the 4-gray scale of the 9-bit gray scale. The luminance of the 1 st row and 1 st column monochrome pixel PIX at the 2-gray scale among the 9-bit gray scales is equal to the average luminance of all the monochrome pixels PIX at the 4-gray scale among the 9-bit gray scales. Then, the second gray scale value in the compensated n-bit gray scale corresponding to the 1 st row and 1 st column monochrome pixel PIX in the 1 st row is adjusted to 2 gray scales in the 9-bit gray scale. And a second gray scale value in n-bit gray scales before compensation corresponding to the monochromatic pixel PIX on the 1 st row and the 2 nd column is determined as 8 gray scales in 9-bit gray scales. However, the luminance of the 1 st row and 2 nd column monochrome pixels PIX at the 8-gray scale among the 9-bit gray scales is smaller than the average luminance of all the monochrome pixels PIX at the 8-gray scale among the 9-bit gray scales. The luminance of the 1 st row and 2 nd column monochrome pixels PIX at the 10 th gray scale among the 9-bit gray scales is equal to the average luminance of all the monochrome pixels PIX at the 8 th gray scale among the 9-bit gray scales. Then, the second gray scale value in the compensated n-bit gray scale corresponding to the monochrome pixel PIX in the 1 st row and the 2 nd column is adjusted to 10 gray scales in the 9-bit gray scale. And determining a second gray scale value in n-bit gray scales before compensation corresponding to the monochrome pixel PIX in the 2 nd row and the 1 st row as 258 gray scales in 9-bit gray scales. However, the luminance of the 1 st column monochrome pixel PIX at the 258 gray scale of the 9-bit gray scale is larger than the average luminance of all the monochrome pixels PIX at the 258 gray scale of the 9-bit gray scale. The luminance of the monochrome pixel PIX at 257 gray scales of 9-bit gray scales of the row 2 and the column 1 is equal to the average luminance of all the monochrome pixels PIX at 258 gray scales of 9-bit gray scales. Then, the second gray scale value in the compensated n-bit gray scale corresponding to the monochrome pixel PIX in row 2 and column 1 is adjusted to 257 gray scale in the 9-bit gray scale. And determining a second gray scale value in N-bit gray scales before compensation corresponding to the M-th row and N-th column of monochrome pixels PIX as 260 gray scales in 9-bit gray scales. However, the luminance of the M-th row and N-th column of the monochrome pixels PIX at the 260 th gray scale in the 9-bit gray scale is lower than that of all the monochrome pixels PIX at the 9-bit gray scaleAverage brightness at a gray level of 260 (g). The luminance of the M-th row and N-th column of monochrome pixels PIX at the 261 th gray scale among the 9-bit gray scales is equal to the average luminance of all the monochrome pixels PIX at the 260 th gray scale among the 9-bit gray scales. Then, the second gray scale value in the compensated N-bit gray scale corresponding to the M-th row and N-th column of monochrome pixels PIX is adjusted to 261 gray scale of 9-bit gray scale. Wherein, the gray levels 2, 10, 257 and 261 of the 9-bit gray levels are the second gray level values of the compensated n-bit gray levels. The second gray scale value in the compensated n-bit gray scales is one of the gray scales from 0 to 511.
In step S60, the monochrome pixel PIX is lit up according to the second gray scale value in the compensated n-bit gray scale.
After the second gray scale values in the N-bit gray scales corresponding to the M rows and N columns of monochrome pixels PIX are sequentially compensated, the M rows and N columns of monochrome pixels PIX are lighted up according to the second gray scale values in the N-bit gray scales after respective compensation. For example, the second gray scale value in the n-bit gray scale corresponding to the 1 st row and 1 st column monochrome pixel PIX is compensated to 2 gray scale of 9-bit gray scale. The 1 st row and 1 st column monochrome pixels PIX are turned on according to the 2-gray level among the 9-bit gray levels. The second gray scale value in the n-bit gray scale corresponding to the 1 st row and 2 nd column monochrome pixel PIX is compensated to 10 gray scales in the 9-bit gray scale. The 1 st row and 2 nd column monochrome pixels PIX are turned on according to 10 gray levels among the 9-bit gray levels. The second gray scale value in the n-bit gray scale corresponding to the 1 st row monochrome pixel PIX in the 2 nd row is compensated to 257 gray scale in the 9-bit gray scale. The row 2 and column 1 monochrome pixels PIX are turned on according to 257 gray levels among the 9-bit gray levels. And compensating a second gray scale value in the N-bit gray scale corresponding to the M-th row and N-th column of monochrome pixels PIX to 261 gray scale in 9-bit gray scale. The M-th row and N-th column of monochrome pixels PIX are turned on according to the 261 gray scale of the 9-bit gray scale.
In this embodiment, the gray scale value luminance mapping rule between the m-bit gray scale and the n-bit gray scale includes establishing a luminance correspondence between the m-bit gray scale and the n-bit gray scale. n-bit gray scale including 2nA gray scale value, m bits gray scale including 2mSince n is greater than m, the number of gray scale values included in the n-bit gray scale is greater than the number of gray scale values included in the m-bit gray scale. 2 of m-bit gray levelsmA gray scale value and2 of n-bit gray levelsmThe gray scale values correspond one to one. Other 2 of n-bit gray levelsn-mIndividual gray scale value and 2 of m-bit gray scalemThe individual gray scale values do not correspond. Wherein, the first gray scale value in the m-bit gray scale corresponds to the second gray scale value in the n-bit gray scale before compensation. The compensated value range of the second gray scale value in the n-bit gray scale is 2 in the n-bit gray scalenRange of gray scale values. The compensated second gray scale value in the n-bit gray scale has brightness higher than 2 in the m-bit gray scalemBrightness corresponding to each gray scale value. Meanwhile, the maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale. The minimum brightness corresponding to the m-bit gray scale is the same as the minimum brightness corresponding to the n-bit gray scale. In the mura compensation process, one or more gray scales are compensated for the monochrome pixels needing compensation, so that the brightness of the monochrome pixels meets the requirement, the compensation precision for the second gray scale value in the n-bit gray scale is better than the compensation precision for the first gray scale value in the m-bit gray scale, and the actual gray scale brightness of the display panel cannot be changed after the demura compensation is performed because the maximum brightness corresponding to the m-bit gray scale and the n-bit gray scale is the same.
FIG. 9 is a flowchart illustrating a compensation method for a display panel according to another embodiment of the present invention; fig. 10 is a schematic structural diagram of a display compensation device according to an embodiment of the present invention.
As shown in fig. 9, compensating for the second gray scale value in the n-bit gray scale includes:
step S51, determining a luminance compensation value of a monochrome pixel PIX at a second gray level value in the n-bit gray levels;
step S52, adjusting a second gray scale value of the n-bit gray scale of the monochrome pixel PIX according to the luminance compensation value;
wherein the luminance compensation value is a difference between the luminance of the monochrome pixel PIX at the second gray scale value in the n-bit gray scale and the average luminance of all the monochrome pixels PIX at the second gray scale value in the n-bit gray scale.
As shown in fig. 9 and 10, the display compensation apparatus 3 includes an image pickup device 31, a processing device 32, and a display panel 2. The imaging device 31 is connected to the processing device 32. The processing device 32 is connected to the display panel 2. Before shipment, all the monochrome pixels PIX in the display panel 2 are lit at the second gray scale value in the same n-bit gray scale. The image pickup device 31 acquires the luminance of all the monochrome pixels PIX in the display panel 2 at the second gray scale value in the same n-bit gray scale. The processing means 32 determines the luminance of any monochrome pixel PIX in the display panel 2 at the second gray scale value in the n-bit gray scale. Meanwhile, the processing device 32 determines the average luminance of all the monochrome pixels PIX in the display panel 2 at the second gray scale value in the same n-bit gray scale. Then, the processing device 32 determines the luminance compensation value of any one of the monochrome pixels PIX in the display panel 2 at the second gray scale value in the n-bit gray scale. The luminance compensation value is a difference between the luminance of the monochrome pixel PIX at the second gray scale value in one n-bit gray scale and the average luminance of all the monochrome pixels PIX at the second gray scale value in the same n-bit gray scale. The processing device 32 transmits the luminance compensation value of any one of the monochrome pixels PIX in the display panel 2 at the second gray scale value in the n-bit gray scale to the display panel 2. After shipment, the display panel 2 determines a luminance compensation value of any one of the monochrome pixels PIX at a second gray scale value among the n-bit gray scales. The display panel 2 adjusts a second gray scale value among n-bit gray scales of any one of the monochrome pixels PIX according to the luminance compensation value. For example, the second gray scale value of the n-bit gray scales before adjustment corresponding to the 1 st row and 1 st column monochrome pixels PIX in the 1 st row is determined as the 4 gray scales of the 9-bit gray scales. However, the luminance of the 1 st row and 1 st column monochrome pixel PIX at the 4-gray scale of the 9-bit gray scale is larger than the average luminance of all the monochrome pixels PIX at the 4-gray scale of the 9-bit gray scale. The luminance of the 1 st row and 1 st column monochrome pixel PIX at the 2-gray scale among the 9-bit gray scales is equal to the average luminance of all the monochrome pixels PIX at the 4-gray scale among the 9-bit gray scales. The luminance compensation value of the 1 st row and 1 st column monochrome pixels PIX in the 1 st column is the difference between the luminance corresponding to the 4-gray level of the 9-bit gray level and the luminance corresponding to the 2-gray level of the 9-bit gray level. Then, the second gray scale value in the adjusted n-bit gray scale corresponding to the 1 st row and 1 st column monochrome pixel PIX becomes 2 gray scale of 9-bit gray scale. And determining the second gray scale value in the n-bit gray scale before adjustment corresponding to the monochromatic pixel PIX in the 1 st row and the 2 nd column as 8 gray scales in 9-bit gray scales. However, the luminance of the 1 st row and 2 nd column monochrome pixels PIX at the 8-gray scale among the 9-bit gray scales is smaller than the average luminance of all the monochrome pixels PIX at the 8-gray scale among the 9-bit gray scales. The luminance of the 1 st row and 2 nd column monochrome pixels PIX at the 10 th gray scale among the 9-bit gray scales is equal to the average luminance of all the monochrome pixels PIX at the 8 th gray scale among the 9-bit gray scales. The luminance compensation value of the row 1 and column 2 monochrome pixels PIX is the difference between the luminance corresponding to the 8-bit gray scale of the 9-bit gray scale and the luminance corresponding to the 10-bit gray scale of the 9-bit gray scale. Then, the second gray scale value in the adjusted n-bit gray scale corresponding to the monochrome pixel PIX in the 1 st row and the 2 nd column becomes 10 gray scales in the 9-bit gray scale. And determining a second gray scale value in the n-bit gray scale before adjustment corresponding to the monochromatic pixel PIX in the 2 nd row and the 1 st row as a 258 gray scale in 9-bit gray scale. However, the luminance of the 1 st column monochrome pixel PIX at the 258 gray scale of the 9-bit gray scale is larger than the average luminance of all the monochrome pixels PIX at the 258 gray scale of the 9-bit gray scale. The luminance of the monochrome pixel PIX at 257 gray scales of 9-bit gray scales of the row 2 and the column 1 is equal to the average luminance of all the monochrome pixels PIX at 258 gray scales of 9-bit gray scales. The luminance compensation value of the row 2 and column 1 monochrome pixels PIX is the difference between the luminance of 258 gray scale of the 9-bit gray scale and the luminance of 257 gray scale of the 9-bit gray scale. Then, the second gray scale value in the adjusted n-bit gray scale corresponding to the monochrome pixel PIX in row 2 and column 1 becomes 257 gray scale of 9-bit gray scale. And determining a second gray scale value in the N-bit gray scale before adjustment corresponding to the M-th row and N-th column of monochrome pixels PIX as a 260 gray scale in 9-bit gray scale. However, the luminance of the M-th row and N-th column of monochrome pixels PIX at a gray scale of 260 out of the 9-bit gray scales is smaller than the average luminance of all the monochrome pixels PIX at a gray scale of 260 out of the 9-bit gray scales. The luminance of the M-th row and N-th column of monochrome pixels PIX at the 261 th gray scale among the 9-bit gray scales is equal to the average luminance of all the monochrome pixels PIX at the 260 th gray scale among the 9-bit gray scales. The luminance compensation value of the M-th row and N-th column of monochrome pixels PIX is the difference between the luminance corresponding to the 260 gray scale of the 9-bit gray scale and the 261 gray scale of the 9-bit gray scale. Then, the second gray scale value in the adjusted N-bit gray scale corresponding to the M-th row and N-th column of monochrome pixels PIX becomes 261 gray scale of 9-bit gray scale. Thus, the display defect of the monochrome pixel PIX when adjusted to be turned on at the second gray scale value among the n-bit gray scales on the display panel 2 is eliminated.
As shown in fig. 3 to 8, m is equal to 8 and n is equal to 9.
On the one hand, the display panel 2 acquires preset image data PIC. The data bit width corresponding to the preset image data PIC is 8 bits. The data bit width corresponding to the conventional preset image data is also 8 bits. The acquired preset image data PIC is the normal preset image data. Thus, the display panel 2 can acquire any conventional preset image data. On the other hand, the second gray scale value of the n-bit gray scale corresponding to the image data PIC is 9-bit binary data. This prevents setting the second gray scale value in the n-bit gray scale corresponding to the image data PIC to have an excessively large data amount.
As shown in fig. 3 to 8, the gray-level value luminance mapping rule between the m-bit gray level and the n-bit gray level includes: x gray scale in the m-bit gray scale corresponds to 4x gray scale in the n-bit gray scale; x is a natural number and the value of x is any one of 0 to 64.
The m-bit gray scale is an 8-bit gray scale. The 8-bit gray scale includes 0 gray scale to 255 gray scale. The n-bit gray scale is a 9-bit gray scale. The 9-bit gray levels include gray levels 0 to 511. The x gray scale of the 8-bit gray scale corresponds to the 4x gray scale of the 9-bit gray scale. For example, a 0 gray level of 8-bit gray levels corresponds to a 0 gray level of 9-bit gray levels. The 1 gray level of the 8-bit gray levels corresponds to the 4 gray levels of the 9-bit gray levels. The 2 gray levels among the 8-bit gray levels correspond to the 8 gray levels among the 9-bit gray levels. The 64 gray levels among the 8-bit gray levels correspond to the 256 gray levels among the 9-bit gray levels. An x gray scale among the m-bit gray scales is used as a first gray scale value among the m-bit gray scales. The 4x gray scale of the n-bit gray scales is used to compensate a second gray scale value of the previous n-bit gray scales. The value range of the 4x gray scale in the n-bit gray scale after compensation is 0 gray scale to 256 gray scale in the n-bit gray scale. The compensated brightness of the 4x gray scale in the n-bit gray scale is more than the brightness corresponding to the 0 gray scale to 64 gray scale in the m-bit gray scale. Meanwhile, the brightness corresponding to the 64 gray levels in the m-bit gray levels is the same as the brightness corresponding to the 256 gray levels in the n-bit gray levels. The brightness corresponding to the 0 gray scale in the m-bit gray scale is the same as the brightness corresponding to the 0 gray scale in the n-bit gray scale. The mura condition is more severe at low gray levels, and thus the compensation accuracy for the 4x gray level of the n-bit gray level is better than the compensation accuracy for the x gray level of the m-bit gray level.
As shown in fig. 3 to 8, the gray-level value luminance mapping rule between the m-bit gray level and the n-bit gray level includes: the y gray scale of the m-bit gray scale corresponds to 256 plus 2 x (y-64) gray scale of the n-bit gray scale; y is a natural number and the value of y is any one of 65 to 128.
The m-bit gray scale is an 8-bit gray scale. The 8-bit gray scale includes 0 gray scale to 255 gray scale. The n-bit gray scale is a 9-bit gray scale. The 9-bit gray levels include gray levels 0 to 511. The y gray scale of the 8-bit gray scale corresponds to 256 + 2 x (y-64) gray scale of the 9-bit gray scale. For example, 65 gray levels among 8-bit gray levels correspond to 258 gray levels among 9-bit gray levels. The 66 gray levels of the 8-bit gray levels correspond to the 260 gray levels of the 9-bit gray levels. The 67 gray levels of the 8-bit gray levels correspond to the 262 gray levels of the 9-bit gray levels. The 128 gray levels of the 8-bit gray levels correspond to the 384 gray levels of the 9-bit gray levels. The y gray scale among the m-bit gray scales is used as a first gray scale value among the m-bit gray scales. 256 + 2 x (y-64) gray scale of the n-bit gray scale is used as the second gray scale value of the n-bit gray scale before compensation. The compensated value range of 256 + 2 x (y-64) gray scale in the n-bit gray scale is 258 gray scale to 384 gray scale in the n-bit gray scale. The compensated brightness of 256 + 2 x (y-64) gray scale in n-bit gray scale is more than that of 65-128 gray scale in m-bit gray scale. Meanwhile, the brightness corresponding to the 128 gray level of the m-bit gray levels is the same as the brightness corresponding to the 384 gray levels of the n-bit gray levels. The brightness corresponding to the 65 gray scale of the m-bit gray scale is the same as the brightness corresponding to the 258 gray scale of the n-bit gray scale. Thus, the accuracy of compensation for 256 + 2 × (y-64) of the n-bit gray scales is better than the accuracy of compensation for the y-bit gray scale of the m-bit gray scales.
As shown in fig. 3 to 8, the gray-level value luminance mapping rule between the m-bit gray level and the n-bit gray level includes: the z gray scale of the m-bit gray scale corresponds to 384 + (z-128) gray scale of the n-bit gray scale; z is a natural number and the value of z is any one of 129 to 255.
The m-bit gray scale is an 8-bit gray scale. The 8-bit gray scale includes 0 gray scale to 255 gray scale. The n-bit gray scale is a 9-bit gray scale. The 9-bit gray levels include gray levels 0 to 511. When z is a natural number and is any one of 129 to 255, the ratio of z gray scale in 8-bit gray scale corresponds to 9384 + (z-128) gray scale in the special gray scale. For example, 129 gray levels of 8-bit gray levels correspond to 385 gray levels of 9-bit gray levels. The 130 gray levels of the 8-bit gray levels correspond to the 386 gray levels of the 9-bit gray levels. The 131 gray levels of the 8-bit gray levels correspond to the 387 gray levels of the 9-bit gray levels. The 255 gray scale of the 8-bit gray scale corresponds to the 511 gray scale of the 9-bit gray scale. When x is a natural number and is any one of 0 to 64, the x gray scale of the 8-bit gray scale corresponds to the 4x gray scale of the 9-bit gray scale. When y is a natural number and is any one of 65-128, the y gray scale of 8-bit gray scale corresponds to 256 +/-2 x (y-64) gray scale of 9-bit gray scale. Thus, 2 in 8-bit gray scale8The brightness of each gray scale value corresponds to 2 bits of gray scale8Brightness of each gray scale value. The gray scale value luminance mapping rule between the 8-bit gray scale and the 9-bit gray scale is easy to establish. And aiming at the actual condition that mura occurs in different gray scales, gray scale value brightness mapping rules are set in a differentiated mode, data utilization is more reasonable, and compensation effect is better.
FIG. 11 is a flowchart illustrating a compensation method for a display panel according to another embodiment of the present invention; FIG. 12 is a graph illustrating the luminance of a display panel and a second gray level value of n-bit gray levels after compensation according to another embodiment of the present invention.
As shown in fig. 11 and 12, lighting the monochrome pixel PIX according to the second gray scale value in the compensated n-bit gray scale includes:
step S61, setting the gamma voltage of the monochrome pixel PIX according to the second gray scale value in the compensated n-bit gray scale;
in step S62, the monochrome pixel PIX is turned on according to the gamma voltage corresponding to the second gray scale value among the compensated n-bit gray scales.
First, a gamma voltage of one monochrome pixel PIX is set according to a second gray scale value among the compensated n-bit gray scales. Then, the monochrome pixel PIX is turned on according to a gamma voltage corresponding to a second gray scale value among the compensated n-bit gray scales. The gamma voltage of the monochrome pixel PIX corresponds to the second gray scale value of the compensated n-bit gray scale one by one. The luminance of the monochrome pixel PIX corresponds to the second gray scale value in the compensated n-bit gray scale one by one. The correspondence relationship between the luminance of the monochrome pixel PIX and the second gray scale value in the compensated n-bit gray scale is an exponential relationship. Generally, the correspondence between the vision of human eyes and the actual brightness is also nonlinear. Thus, such a display panel 2 achieves a very excellent visual experience by the gamma voltage.
Fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the invention.
As shown in fig. 13, the monochrome pixel PIX is one of a red pixel PX1, a green pixel PX2, or a blue pixel PX 3.
The monochrome pixel PIX is a red pixel PX1, a green pixel PX2, or a blue pixel PX 3. The red pixel PX1, the green pixel PX2, and the blue pixel PX3 are compensated separately. The red pixel PX1 lights up according to its second gray value among the compensated n-bit gray levels. The green pixel PX2 lights up according to the second gray-scale value of its compensated n-bit gray-scale. The blue pixel PX3 lights up according to the second gray-scale value among its compensated n-bit gray-scales. The display defect when the red pixel PX1 is lit at the second gray-scale value in the compensated n-bit gray-scale is eliminated. The display defect when the green pixel PX2 is lit at the second gray-scale value in the compensated n-bit gray-scale is eliminated. The display defect when the blue pixel PX3 is lit at the second gray-scale value in the compensated n-bit gray-scale is eliminated.
Fig. 14 is a schematic block diagram of another display panel according to an embodiment of the invention.
As shown in fig. 3 and 14, the display panel 2 includes a mapping module 21, an obtaining module 22, a processing module 23, a compensating module 24, a lighting module 25, and a plurality of monochrome pixels PIX; the mapping module 21 establishes a gray scale value luminance mapping rule between m-bit gray scales and n-bit gray scales, wherein the gray scale value luminance mapping rule includes a luminance correspondence between the m-bit gray scales and the n-bit gray scales, the m bits are data bit widths corresponding to preset image data PIC of monochrome pixels PIX in the display panel 2, and the n-bit gray scales include 2nA gray scale value, m bits of gray scale including 2mThe maximum brightness corresponding to m-bit gray scale is the same as the maximum brightness corresponding to n-bit gray scale, m and n are positive integers, and m is smaller than n; the obtaining module 22 obtains preset image data PIC; the processing module 23 determines a first gray scale value in m-bit gray scales corresponding to preset image data PIC; treatment ofThe module 23 determines a second gray scale value in the n-bit gray scale corresponding to the preset image data PIC according to the gray scale value brightness mapping rule; the compensation module 24 compensates a second gray scale value in the n-bit gray scale; the lighting module 25 lights up the monochrome pixel PIX according to the second gray scale value of the compensated n-bit gray scale.
In this embodiment, the gray-scale value luminance mapping rule between the m-bit gray scale and the n-bit gray scale includes the luminance correspondence between the m-bit gray scale and the n-bit gray scale. 2 of n-bit gray levelsnThe gray scale value is more than 2 of m bit gray scalemAnd (4) gray scale values. 2 of m-bit gray levelsmOne gray level value and 2 of n-bit gray levelsmThe gray scale values correspond one to one. Other 2 of n-bit gray levelsn-mIndividual gray scale value and 2 of m-bit gray scalemThe individual gray scale values do not correspond. Wherein, the first gray scale value in the m-bit gray scale corresponds to the second gray scale value in the n-bit gray scale before compensation. The compensated value range of the second gray scale value in the n-bit gray scale is 2 in the n-bit gray scalenRange of gray scale values. The compensated second gray scale value in the n-bit gray scale has brightness higher than 2 in the m-bit gray scalemBrightness corresponding to each gray scale value. Meanwhile, the maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale. The minimum brightness corresponding to the m-bit gray scale is the same as the minimum brightness corresponding to the n-bit gray scale. Thus, the accuracy of compensating for the second gray scale value in the n-bit gray scale is better than the accuracy of compensating for the first gray scale value in the m-bit gray scale.
Fig. 15 is a schematic structural diagram of a display device according to an embodiment of the invention.
As shown in fig. 15, the display device 4 includes a display panel 2.
The display device 4 displays an image using the display panel 2. The display device 4 may be a smartphone or similar device. The display panel 2 is described above and will not be described in detail.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. A compensation method for a display panel, comprising:
establishing a gray-scale value brightness mapping rule between m-bit gray scales and n-bit gray scales, wherein the gray-scale value brightness mapping rule comprises a brightness corresponding relation between the m-bit gray scales and the n-bit gray scales, the m bits are data bit widths corresponding to preset image data of monochrome pixels in the display panel, and the n-bit gray scales comprise 2nA gray scale value, the m-bit gray scale including 2mThe maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale, m and n are positive integers, and m is smaller than n;
acquiring the preset image data;
determining a first gray scale value in the m-bit gray scale corresponding to the preset image data;
determining a second gray scale value in the n-bit gray scale corresponding to the preset image data according to the gray scale value brightness mapping rule;
compensating a second gray scale value in the n-bit gray scale;
lighting the monochrome pixel according to a second gray scale value of the compensated n-bit gray scales; the gray scale value brightness mapping rule between the m-bit gray scale and the n-bit gray scale comprises the following steps: the x gray scale in the m-bit gray scale corresponds to the 4x gray scale in the n-bit gray scale;
x is a natural number and the value of x is any one of 0 to 64.
2. The compensation method as claimed in claim 1, wherein the compensating the second gray scale value of the n-bit gray scales comprises:
determining a luminance compensation value of one of the monochrome pixels at the second gray scale value among the n-bit gray scales;
adjusting the second gray scale value in the n-bit gray scale of the monochrome pixel according to the brightness compensation value;
wherein the luminance compensation value is a difference between the luminance of the monochrome pixel at the second gray scale value in the n-bit gray scales and an average luminance of all the monochrome pixels at the second gray scale value in the n-bit gray scales.
3. The compensation method for a display panel according to claim 1, wherein m is equal to 8 and n is equal to 9.
4. The compensation method as claimed in claim 1, wherein the gray level value luminance mapping rule between the m-bit gray level and the n-bit gray level comprises: the y gray scale of the m-bit gray scales corresponds to 256 plus 2 x (y-64) gray scale of the n-bit gray scales;
y is a natural number and the value of y is any one of 65 to 128.
5. The compensation method as claimed in claim 1, wherein the gray level value luminance mapping rule between the m-bit gray level and the n-bit gray level comprises: the z gray scale of the m-bit gray scales corresponds to 384 + (z-128) gray scales of the n-bit gray scales;
z is a natural number and the value of z is any one of 129 to 255.
6. The compensation method as claimed in claim 1, wherein said lighting up the monochrome pixel according to the second gray scale value of the compensated n-bit gray scale comprises:
setting a gamma voltage of the monochrome pixel according to the compensated second gray scale value among the n-bit gray scales;
lighting the monochrome pixel according to the gamma voltage corresponding to the second gray scale value of the compensated n-bit gray scale.
7. The compensation method for a display panel according to claim 1, wherein the monochrome pixel is one of a red pixel, a green pixel, or a blue pixel.
8. A display panel is characterized by comprising a mapping module, an acquisition module, a processing module, a compensation module, a lighting module and a plurality of monochrome pixels;
the mapping module establishes a gray-scale value brightness mapping rule between an m-bit gray scale and an n-bit gray scale, wherein the gray-scale value brightness mapping rule comprises a brightness corresponding relation between the m-bit gray scale and the n-bit gray scale, the m bits are data bit widths corresponding to preset image data of the monochrome pixels in the display panel, and the n-bit gray scale comprises 2nA gray scale value, the m-bit gray scale including 2mThe maximum brightness corresponding to the m-bit gray scale is the same as the maximum brightness corresponding to the n-bit gray scale, m and n are positive integers, and m is smaller than n;
the acquisition module acquires the preset image data;
the processing module determines a first gray scale value in the m-bit gray scale corresponding to the preset image data;
the processing module determines a second gray scale value in the n-bit gray scale corresponding to the preset image data according to the gray scale value brightness mapping rule;
the compensation module compensates a second gray scale value in the n-bit gray scale;
the lighting module lights the monochrome pixel according to a second gray scale value in the compensated n-bit gray scale.
9. A display device characterized by comprising the display panel according to claim 8.
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