CN108766372B - Method for improving mura phenomenon of display panel - Google Patents

The invention relates to a method for improving mura phenomenon of a display panel, which comprises the following steps: acquiring a mura area of a display panel; acquiring compensation data of a plurality of set gray scales in the mura area; setting a low gray level threshold value and a high gray level threshold value of the mura area; establishing a gray scale compensation data table according to the compensation data of the plurality of set gray scales, the low gray scale threshold value and the high gray scale threshold value; and performing gray scale compensation on the current gray scale of the display panel according to the gray scale compensation data table. The mura phenomenon compensation method provided by the invention performs gray scale compensation on the mura area of the display panel by only storing the compensation data of the set gray scale, the low gray scale threshold value and the high gray scale threshold value, has small storage amount of the memory and small operand, reduces the operation cost, and can adjust the size of the extracted pixel compression area block according to the actual brightness of the mura area, thereby improving the display effect of the display panel.

Method for improving mura phenomenon of display panel

Technical Field

The invention belongs to the technical field of display, and particularly relates to a method for improving a mura phenomenon of a display panel.

Background

With the development of Display technology, Liquid Crystal Displays (LCDs) have advantages of light weight, thinness, and low radiation, and gradually replace Cathode Ray Tube (CRT) Display devices. Liquid crystal displays are widely used in information terminals such as computers, smart phones, mobile phones, car navigation devices, electronic books, and the like, and are the most common display devices.

Due to defects in the manufacturing process of the liquid crystal display, the brightness of the display panel of the produced liquid crystal display is often uneven, and various mura (mura refers to the phenomenon that the brightness of the display is uneven and various marks are caused) are formed, for example, when a 65-inch display panel and a 32-inch display panel are cut in a mixed mode, mura is often generated in a splicing area. In order to improve the uniformity of the brightness of a display panel (panel), a mura compensation method is provided at present, namely, an external camera is used for shooting the mura form of a gray-scale picture (a pure white picture with different brightness), the brightness difference between the brightness of the peripheral area and the brightness of the central position is calculated by comparing the brightness of the central position of the display panel, and then the gray scale (the area brighter than the central position is used for reducing the gray scale so as to reduce the brightness, and the area darker than the central position is used for improving the gray scale so as to improve the brightness) of the mura position is reversely compensated, so that the whole display panel can achieve the more consistent brightness.

However, the amount of compensation data of the existing mura compensation method is large, which results in a large capacity of a memory for compensation data, and the size of the pixel compression area block extracted by the existing compensation method is fixed and cannot be adjusted, which results in a large amount of calculation of the mura compensation method and increases the operation cost.

Disclosure of Invention

In order to solve the above problems in the prior art, the present invention provides a method for improving a mura phenomenon of a display panel.

An embodiment of the present invention provides a method of improving a mura phenomenon of a display panel, including:

acquiring a mura area of a display panel;

acquiring compensation data of a plurality of set gray scales in the mura area;

setting a low gray level threshold value and a high gray level threshold value of the mura area;

establishing a gray scale compensation data table according to the compensation data of the plurality of set gray scales, the low gray scale threshold value and the high gray scale threshold value;

and performing gray scale compensation on the current gray scale of the display panel according to the gray scale compensation data table.

In one embodiment of the present invention, the plurality of set gray levels includes a first set gray level, a second set gray level and a third set gray level.

In an embodiment of the present invention, obtaining compensation data of a plurality of set gray scales of the mura area includes:

respectively selecting n × m pixels in the mura area under the conditions of the first set gray scale, the second set gray scale and the third set gray scale, wherein n and m are natural numbers larger than 0;

under the conditions of the first set gray scale, the second set gray scale and the third set gray scale, pixels with set numerical values are respectively contained between every two pixel points in the n transverse pixels;

under the conditions of the first set gray scale, the second set gray scale and the third set gray scale, pixels with set numerical values are respectively contained between every two pixel points in the m longitudinal pixels;

respectively obtaining the compensation data of all pixels under the conditions of the first set gray scale, the second set gray scale and the third set gray scale according to the compensation values of the n x m pixels under the conditions of the first set gray scale, the second set gray scale and the third set gray scale.

In one embodiment of the present invention, the set value is 2^M-1, wherein M is a natural number.

In an embodiment of the invention, the gray scale value of the first set gray scale is smaller than the gray scale value of the second set gray scale, and the gray scale value of the second set gray scale is smaller than the gray scale value of the third set gray scale.

In an embodiment of the invention, the low gray level threshold is smaller than the gray level value of the first set gray level.

In one embodiment of the present invention, the low gray level thresholds include an R low gray level threshold, a G low gray level threshold, and a B low gray level threshold.

In an embodiment of the invention, the high gray level threshold is greater than the gray level value of the third set gray level.

In one embodiment of the present invention, the high grayscale threshold includes an R high grayscale threshold, a G high grayscale threshold, and a B high grayscale threshold.

In an embodiment of the present invention, performing gray scale compensation on the current gray scale of the display panel according to the gray scale compensation data table includes:

acquiring the current gray scale of the display panel;

and judging the position of the current gray scale in the gray scale compensation data table so as to perform gray scale compensation on the current gray scale.

Compared with the prior art, the invention has the following beneficial effects:

the mura phenomenon compensation method provided by the invention performs gray scale compensation on the mura area of the display panel by only storing the compensation data of the set gray scale, the low gray scale threshold value and the high gray scale threshold value, has small storage amount of the memory and small operand, reduces the operation cost, and can adjust the size of the extracted pixel compression area block according to the actual brightness of the mura area, thereby improving the display effect of the display panel.

Drawings

FIG. 1 is a flowchart illustrating a method for improving mura phenomenon of a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating a method for interpolating a mura area of a display panel according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a gray scale compensation data table according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a compensation implementation architecture according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a data flow direction of a timing driver (TCON) according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.

Example one

Referring to fig. 1, fig. 1 is a flowchart illustrating a method for improving mura phenomenon of a display panel according to an embodiment of the present invention. The mura phenomenon compensation method provided by this embodiment includes the steps of:

acquiring a mura area of a display panel;

acquiring compensation data of a plurality of set gray scales in the mura area;

setting a low gray level threshold value and a high gray level threshold value of the mura area;

establishing a gray scale compensation data table according to the compensation data of the plurality of set gray scales, the low gray scale threshold value and the high gray scale threshold value;

and performing gray scale compensation on the current gray scale of the display panel according to the gray scale compensation data table.

The mura phenomenon compensation method provided by the invention performs gray scale compensation on the mura area of the display panel by only storing the compensation data of the set gray scale, the low gray scale threshold value and the high gray scale threshold value, has small storage amount of the memory and small operand, reduces the operation cost, and can adjust the size of the extracted pixel compression area block according to the actual brightness of the mura area, thereby improving the display effect of the display panel.

Step 1, providing a display panel, wherein if a mura phenomenon occurs in the display panel, for example, a bright band in a splicing area of the display panel, an area of the mura area is smaller than that of the whole display surface, so that the embodiment uses an external camera to only shoot the mura area of the display panel.

step 2.1, under the first set gray scale condition, the mura area comprises n × m pixels, namely the mura area is extracted to be pixel points comprising m rows and n columns, wherein n and m are natural numbers larger than 0;

2 can be interpolated between every two pixel points in m longitudinal pixels^NWhere N is 0,1,2,3 …, for example, the number of linearly interpolatable pixels between two pixels in m vertical pixels is 1,2, 4, 8, 16, 32, 64, 128, 256, and 512, but it should be understood that the number of interpolatable pixels between two pixels in m vertical pixels depends on the actual situation.

When the gray scale change between two adjacent selected pixel points in the mura area is small, the number of pixels required to be inserted between the two pixel points is small, then N can take a relatively small value, when the gray scale change between two adjacent selected pixel points in the mura area is large, the number of pixels required to be inserted between the two pixel points is large, then N can take a relatively large value.

Therefore, a pixel with a set numerical value can be contained between every two pixel points in the n horizontal pixels, and a pixel with a set numerical value can be contained between every two pixel points in the m longitudinal pixels;

preferably, the set value is 2^M-1, wherein M is a natural number.

Step 2.2, the data memory stores n x m compensation values respectively corresponding to the n x m pixels under the first set gray scale condition;

calculating compensation data of all pixels in the mura area under the condition of the first set gray scale by using a bilinear interpolation method according to the compensation value of the n x m pixels, and finally obtaining a first compensation gray scale of the first set gray scale after compensation;

Step 2.3, under the second set gray scale condition, the mura area comprises n × m pixels, namely the mura area is extracted to be pixel points comprising m rows and n columns, wherein n and m are natural numbers larger than 0;

2 can be interpolated between every two pixel points in m longitudinal pixels^NWhere N is 0,1,2,3 …, for example, the number of linearly interpolatable pixels between two pixels in m vertical pixels is 1,2, 4, 8, 16, 32, 64, 128, 256, and 512, but it should be understood that the number of interpolatable pixels between two pixels in m vertical pixels depends on the actual situation.

When the gray scale change between two adjacent selected pixel points in the mura area is small, the number of pixels required to be inserted between the two pixel points is small, then N can take a relatively small value, when the gray scale change between two adjacent selected pixel points in the mura area is large, the number of pixels required to be inserted between the two pixel points is large, then N can take a relatively large value.

Therefore, a pixel with a set numerical value can be contained between every two pixel points in the n horizontal pixels, and a pixel with a set numerical value can be contained between every two pixel points in the m longitudinal pixels;

preferably, the set value is 2^M-1, wherein M is a natural number.

Thus, the pixel is determined according to the selected n x m pixels

Step 2.4, the data memory stores n x m compensation values respectively corresponding to the n x m pixels under the second set gray scale condition;

and calculating the compensation data of all pixels in the mura area under the second set gray scale condition by using a bilinear interpolation method according to the compensation value of the n x m pixels, and finally obtaining a second compensation gray scale of the second set gray scale after compensation.

Step 2.5, step 2.3, under the third set gray scale condition, the mura area comprises n × m pixels, namely the mura area is extracted to be pixel points comprising m rows and n columns, wherein n and m are natural numbers larger than 0;

2 can be interpolated between every two pixel points in m longitudinal pixels^NWhere N is 0,1,2,3 …, for example, the number of linearly interpolatable pixels between two pixels in m vertical pixels is 1,2, 4, 8, 16, 32, 64, 128, 256, and 512, but it should be understood that the number of interpolatable pixels between two pixels in m vertical pixels depends on the actual situation.

When the gray scale change between two adjacent selected pixel points in the mura area is small, the number of pixels required to be inserted between the two pixel points is small, then N can take a relatively small value, when the gray scale change between two adjacent selected pixel points in the mura area is large, the number of pixels required to be inserted between the two pixel points is large, then N can take a relatively large value.

Therefore, a pixel with a set numerical value can be contained between every two pixel points in the n horizontal pixels, and a pixel with a set numerical value can be contained between every two pixel points in the m longitudinal pixels;

preferably, the set value is 2^M-1, wherein M is a natural number.

Step 2.6, the data memory stores n x m compensation values respectively corresponding to the n x m pixels under the third set gray scale condition;

and calculating the compensation data of all pixels in the mura area under the condition of the third set gray scale by using a bilinear interpolation method according to the compensation value of the n x m pixels, and finally obtaining the compensated third compensation gray scale of the third set gray scale.

The embodiment can perform the gray scale compensation of the pixels according to the gray scale change condition of two adjacent pixels in the mura area, thereby reducing the calculation difficulty, the calculation amount and the consumption of hardware storage space.

It can be known that the n × m pixels selected by the first, second and third set grayscales may be the same or different.

The gray value of the first set gray scale is smaller than that of the second set gray scale, and the gray value of the second set gray scale is smaller than that of the third set gray scale.

The present embodiment provides three setting gray levels, and obviously, four setting gray levels or even more setting gray levels can be provided, and the three setting gray levels described in the present embodiment are only a part of embodiments of the present invention, but 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.

Step 3, setting a low gray level threshold value and a high gray level threshold value of the mura area;

3.1, the low gray level threshold comprises an R low gray level threshold, a G low gray level threshold and a B low gray level threshold, wherein the R low gray level threshold is a low gray level threshold set by a red channel, the G low gray level threshold is a low gray level threshold set by a green channel, the B low gray level threshold is a low gray level threshold set by a blue channel, and the R low gray level threshold, the G low gray level threshold and the B low gray level threshold are all smaller than a first set gray level;

and 3.2, the high gray level threshold value comprises an R high gray level threshold value, a G high gray level threshold value and a B high gray level threshold value, wherein the R high gray level threshold value is a high gray level threshold value set by a red channel, the G high gray level threshold value is a high gray level threshold value set by a green channel, the B high gray level threshold value is a high gray level threshold value set by a blue channel, and the R high gray level threshold value, the G high gray level threshold value and the B high gray level threshold value are all larger than a third set gray level.

Step 4, establishing a gray scale compensation data table according to the compensation data of the plurality of set gray scales, the low gray scale threshold value and the high gray scale threshold value;

and establishing a gray scale compensation data table according to the first set gray scale and a corresponding first compensation gray scale, the second set gray scale and a corresponding second compensation gray scale, the third set gray scale and a corresponding third compensation gray scale, and the R low gray scale threshold, the G low gray scale threshold, the B low gray scale threshold, the R high gray scale threshold, the G high gray scale threshold and the B high gray scale threshold.

acquiring a current gray scale to be compensated of the display panel;

substituting the current gray scale into a gray scale compensation data table, determining the position of the current gray scale in the gray scale compensation data table according to the gray scale value of the current gray scale, namely judging the relation between the current gray scale and a first set gray scale, a second set gray scale, a third set gray scale, an R low gray scale threshold, a G low gray scale threshold, a B low gray scale threshold, an R high gray scale threshold, a G high gray scale threshold and a B high gray scale threshold, determining two most adjacent gray scale values of the current gray scale according to the gray scale value of the current gray scale according to the gray scale compensation data table, and obtaining the final output gray scale of the display panel through the gray scale compensation data table according to the two most adjacent gray scale values.

The current gray level is input into the gray level compensation data table, and the input gray level of the G low gray level threshold is M₁R is M at the input gray level of the low gray level threshold₂And the input gray scale of the B low gray scale threshold is M₃The input gray scale of the first set gray scale is M₄₁The corresponding first compensation gray scale is M₄₂The input gray scale of the second set gray scale is M₅₁The corresponding second compensation gray scale is M₅₂The input gray scale of the third set gray scale is M₆₁The corresponding third compensation gray scale is M₆₂G high gray level threshold is M₇R is a high gray level threshold of M₈The B high gray level threshold is M₉If the current gray scale is the G input gray scale, when the G input gray scale is smaller than M₁If the input gray scale is larger than M, outputting the gray scale according to the actual gray scale value of the G input gray scale₁Less than M₄₁Performing gray scale compensation on the G input gray scale by using a bilinear interpolation method according to the G low gray scale threshold and a first compensation gray scale corresponding to a first set gray scale, so as to determine an output gray scale of the G input gray scale after gray scale compensation; if the current gray scale is R input gray scale, when the R input gray scale is less than M₂If the input gray scale of the R input gray scale is larger than M, outputting the gray scale according to the actual gray scale value of the R input gray scale₂Less than M₄₁When the R input gray scale is compensated, performing gray scale compensation on the R input gray scale by using a bilinear interpolation method according to the R low gray scale threshold and a first compensation gray scale corresponding to a first set gray scale, and determining an output gray scale of the R input gray scale after gray scale compensation; if the current gray scale is the B input gray scale, when the B input gray scale is less than M₃If the input gray scale of the B input gray scale is larger than M, outputting the gray scale according to the actual gray scale value of the B input gray scale₃Less than M₄₁When the gray scale compensation is needed, performing gray scale compensation on the B input gray scale by using a bilinear interpolation method according to a B low gray scale threshold and a first compensation gray scale corresponding to a first set gray scale, and determining an output gray scale of the B input gray scale after gray scale compensation; if the gray scale value of the current gray scale is larger than M₄₁Less than M₅₁Then, a bilinear interpolation method is used to obtain a first compensation gray scale M corresponding to the first set gray scale₄₂A second compensation gray scale M corresponding to the second set gray scale₅₂Calculating an output gray scale of the current gray scale after gray scale compensation; if the gray scale value of the current gray scale is larger than M₅₁Less than M₆₁Then, a bilinear interpolation method is used to obtain a second compensation gray scale M corresponding to the second set gray scale₅₂A third compensation gray scale M corresponding to the third set gray scale₆₂Calculating an output gray scale of the current gray scale after gray scale compensation; if the current gray scale is G input gray scale, when the G input gray scale is larger than M₇If the input gray scale is larger than M, outputting the gray scale according to the actual gray scale value of the G input gray scale₆₁Less than M₇Then, use the double lineThe third compensation gray scale M corresponding to the third set gray scale according to the G high gray scale threshold value by the sexual interpolation method₆₂Performing gray scale compensation on the G input gray scale so as to determine the output gray scale of the G input gray scale after gray scale compensation; if the current gray scale is R input gray scale, when the R input gray scale is larger than M₈If the input gray scale of the R input gray scale is larger than M, outputting the gray scale according to the actual gray scale value of the R input gray scale₆₁Less than M₈Then, a bilinear interpolation method is used to obtain a third compensation gray scale M corresponding to the third set gray scale according to the R high gray scale threshold value₆₂Performing gray scale compensation on the R input gray scale so as to determine an output gray scale of the R input gray scale after gray scale compensation; if the current gray scale is the B input gray scale, when the B input gray scale is larger than M₉If the input gray scale of the B input gray scale is larger than M, outputting the gray scale according to the actual gray scale value of the B input gray scale₆₁Less than M₉Then, a bilinear interpolation method is used to compensate the third compensation gray scale M corresponding to the third set gray scale according to the B high gray scale threshold value₆₂And performing gray scale compensation on the B input gray scale so as to determine the output gray scale of the B input gray scale after gray scale compensation.

Example two

In order to better explain the mura phenomenon compensation method of the present invention, the present embodiment will describe the mura phenomenon compensation method in detail according to a specific implementation procedure.

Step 1, providing a display panel, and only shooting a mura area of the display panel by using an external camera, wherein the width of the mura area is about 50 pixels, and the mura area is determined according to the driving width of actual mura;

step 2.1, under the first set gray scale condition, preferably, 11 × 3 pixels in the display panel are selected, please refer to fig. 2, and fig. 2 is a schematic diagram of an interpolation method for a mura area of the display panel according to an embodiment of the present invention, for example, 11 horizontal pixels are respectively selected as pixel 1, pixel 5, pixel 9, pixel 13, pixel 17, pixel 21, pixel 25, pixel 29, pixel 33, pixel 37, and pixel 41, of course, these 11 points may be selected according to actual conditions, since the gray scale change of the mura area is obvious, for better compensation, the pixel points may be selected by collecting multiple images in the mura area, and a small number of pixels may be selected outside the mura area, for example, if 9 pixels are selected in the mura area, 2 pixels are selected outside the mura area, wherein pixel 1 and pixel 41 are located outside the mura area, and pixel 5, pixel 9, pixel 13, pixel 17, and pixel 41 are located outside the mura area, and pixel 5, pixel 9, pixel 13, The pixel 21, the pixel 25, the pixel 29, the pixel 33 and the pixel 37 are located in the mura area, and 3 longitudinal pixels can be selected according to actual conditions and respectively take the pixels at three different positions.

And 2.2, obtaining compensation values of the 11 x 3 pixel corresponding gray scales, and calculating the compensation values of the selected corresponding gray scales of all pixels in the mura area through the gray scale compensation of the 11 x 3 pixels according to a bilinear interpolation method, so as to determine a first compensation gray scale of the first set gray scale after gray scale compensation, wherein the first compensation gray scale is 106 after the first set gray scale is subjected to the gray scale compensation, if the first compensation gray scale is calculated, 100 gray scales are obtained.

And 2.4, obtaining compensation values of the 11 x 3 pixel corresponding gray scales, and calculating the compensation values of the selected corresponding gray scales of all pixels in the mura area through the gray scale compensation of the 11 x 3 pixels according to a bilinear interpolation method, so as to determine a second compensation gray scale of the second set gray scale after the gray scale compensation, wherein the second compensation gray scale is 192 after the gray scale compensation of 190 is obtained after calculation.

And 2.6, obtaining compensation values of the 11 x 3 pixel corresponding gray scales, and calculating the compensation values of the selected corresponding gray scales of all pixels in the mura area through the gray scale compensation of the 11 x 3 pixels according to a bilinear interpolation method, so as to determine a third compensation gray scale of the third set gray scale after the gray scale compensation, wherein if the third compensation gray scale is calculated, the second compensation gray scale is 239 after the gray scale compensation is obtained 240.

Step 3, setting a low gray level threshold value and a high gray level threshold value of the mura area;

specifically, the low gray level threshold includes an R low gray level threshold, a G low gray level threshold, and a B low gray level threshold, the input gray level of the G low gray level threshold is set to be 5, the input gray level of the R low gray level threshold is set to be 10, the input gray level of the G low gray level threshold is set to be 15, the high gray level threshold includes an R high gray level threshold, a G high gray level threshold, and a B high gray level threshold, the G high gray level threshold is set to be 245, the R high gray level threshold is set to be 250, and the B high gray level threshold is set to be 252.

And 4, establishing a gray level compensation data table according to the first set gray level and the corresponding first compensation gray level, the second set gray level and the corresponding second compensation gray level, the third set gray level and the corresponding third compensation gray level, and the R low gray level threshold, the G low gray level threshold, the B low gray level threshold, the R high gray level threshold, the G high gray level threshold and the B high gray level threshold.

If the current gray scale is the G input gray scale, outputting the gray scale according to the actual gray scale value of the G input gray scale when the G input gray scale is less than 5, and if the input gray scale of the G input gray scale is more than 5 and less than 100, performing gray scale compensation on the G input gray scale according to a G low gray scale threshold and a first compensation gray scale corresponding to a first set gray scale by using a bilinear interpolation method, so as to determine the output gray scale of the G input gray scale after gray scale compensation; if the current gray scale is an R input gray scale, outputting the gray scale according to the actual gray scale value of the R input gray scale when the R input gray scale is less than 10, and if the input gray scale of the R input gray scale is more than 10 and less than 100, performing gray scale compensation on the R input gray scale by using a bilinear interpolation method according to an R low gray scale threshold and a first compensation gray scale corresponding to a first set gray scale so as to determine the output gray scale of the R input gray scale after gray scale compensation; if the current gray scale is the B input gray scale, outputting the gray scale according to the actual gray scale value of the B input gray scale when the B input gray scale is less than 15, and if the input gray scale of the B input gray scale is greater than 15 and less than 100, performing gray scale compensation on the B input gray scale by using a bilinear interpolation method according to a B low gray scale threshold and a first compensation gray scale corresponding to a first set gray scale so as to determine the output gray scale of the B input gray scale after gray scale compensation; if the gray scale value of the current gray scale is more than 100 and less than 190, calculating the output gray scale of the current gray scale after gray scale compensation according to a first compensation gray scale corresponding to the first set gray scale and a second compensation gray scale corresponding to the second set gray scale by using a bilinear interpolation method; if the gray scale value of the current gray scale is more than 190 and less than 240, calculating the output gray scale of the current gray scale after gray scale compensation according to a second compensation gray scale corresponding to the second set gray scale and a third compensation gray scale corresponding to the third set gray scale by using a bilinear interpolation method; if the current gray scale is the G input gray scale, outputting the gray scale according to the actual gray scale value of the G input gray scale when the G input gray scale is larger than 245, and if the input gray scale of the G input gray scale is larger than 240 and smaller than 245, performing gray scale compensation on the G input gray scale according to a G high gray scale threshold and a third compensation gray scale corresponding to a third set gray scale by using a bilinear interpolation method, so as to determine the output gray scale of the G input gray scale after gray scale compensation; if the current gray scale is an R input gray scale, outputting the gray scale according to the actual gray scale value of the R input gray scale when the R input gray scale is larger than 250, and if the input gray scale of the R input gray scale is larger than 240 and smaller than 250, performing gray scale compensation on the R input gray scale according to an R high gray scale threshold and a third compensation gray scale corresponding to a third set gray scale by using a bilinear interpolation method, so as to determine the output gray scale of the R input gray scale after gray scale compensation; if the current gray scale is the B input gray scale, outputting the gray scale according to the actual gray scale value of the B input gray scale when the B input gray scale is larger than 252, and if the input gray scale of the B input gray scale is larger than 240 and smaller than 252, performing gray scale compensation on the B input gray scale according to a B high gray scale threshold and a third compensation gray scale corresponding to a third set gray scale by using a bilinear interpolation method, thereby determining the output gray scale of the B input gray scale after gray scale compensation.

EXAMPLE III

Referring to fig. 4, fig. 4 is a schematic diagram of a compensation implementation framework according to an embodiment of the present invention, and the present invention introduces a specific application of the mura phenomenon compensation method according to the present invention based on the above-mentioned embodiment.

The method comprises the steps of obtaining a current image, inputting the current image into a coordinate obtaining module (h _ v _ position), obtaining coordinates of data corresponding to the current image through the coordinate obtaining module, determining sampling values of four pixel points of the data corresponding to the current image through a table look-up module (f _ m _ e _ data _ gen), and calculating a compensation value of each set gray scale through a bilinear interpolation method of the compensation module, wherein the compensation module comprises a transverse compensation module (neocha _ x) and a longitudinal compensation module (neocha _ y), the transverse compensation module is used for calculating a compensation value of a pixel point interpolated in the transverse direction, and the longitudinal compensation module is used for calculating a compensation value of a pixel point interpolated in the transverse direction.

Referring to fig. 5, fig. 5 is a schematic diagram illustrating a data flow of a timing driver (TCON) according to an embodiment of the invention. The data of the current image is transmitted to an over-drive module (OD) through a Receiver (LVDS Receiver), then transmitted to an equipment drive content module (DGC) through the drive module (OD), then transmitted to a clock and scheduling module (CSC) through the equipment drive content module (DGC), then transmitted to an IP module through the clock and scheduling module (CSC), then transmitted to a jitter processing module (dither) through the IP module, then transmitted to a Line Buffer (Line Buffer) through the jitter processing module (dither), and finally transmitted to a converter (mini-LVDS Transmitter) through the Line Buffer (Line Buffer).

The above description is further detailed description of the method for improving mura phenomenon of a display panel according to the present invention with reference to specific preferred embodiments, and it is not to be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.