WO2017063230A1 - Mura现象补偿方法 - Google Patents

Mura现象补偿方法 Download PDF

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Publication number
WO2017063230A1
WO2017063230A1 PCT/CN2015/093072 CN2015093072W WO2017063230A1 WO 2017063230 A1 WO2017063230 A1 WO 2017063230A1 CN 2015093072 W CN2015093072 W CN 2015093072W WO 2017063230 A1 WO2017063230 A1 WO 2017063230A1
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Prior art keywords
gradation
pixel
gray
preselected
boundary
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English (en)
French (fr)
Inventor
张小宁
屠震涛
梁志虎
王恒杰
黄泰钧
梁鹏飞
王利民
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Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to GB1802025.5A priority Critical patent/GB2557759B/en
Priority to US14/892,204 priority patent/US9747851B2/en
Priority to JP2018514864A priority patent/JP6625737B2/ja
Priority to KR1020187006802A priority patent/KR102016869B1/ko
Publication of WO2017063230A1 publication Critical patent/WO2017063230A1/zh
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3666—Control of matrices with row and column drivers using an active matrix with the matrix divided into sections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0232—Special driving of display border areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a Mura phenomenon compensation method.
  • LCD Liquid crystal display
  • PDA personal digital assistant
  • the Mura phenomenon has become a bottleneck restricting LCD development.
  • the probability of occurrence of the Mura phenomenon can be reduced by increasing the level of the process or improving the purity of the raw materials.
  • the physical characteristics have been finalized.
  • the brightness of the pixel can be corrected by the gradation compensation method, thereby improving the Mura phenomenon.
  • the gradation compensation is to improve the brightness uniformity by changing the gradation value of the pixel: that is, when the pure gray image is displayed, a lower gradation value is applied to the pixel having a higher display brightness, and the pixel having a lower display brightness is displayed. A higher gray value is applied, so that the brightness of each pixel is nearly uniform after the gray level compensation, and the Mura phenomenon is improved.
  • the existing techniques for compensating for the Mura phenomenon generally require calculation and compensation of data for each gray level of all pixels of the full screen of the LCD display panel, and the amount of data is large, and the requirements for hardware storage space are high.
  • the object of the present invention is to provide a method for compensating the Mura phenomenon, which can solve the problem of time-consuming and laborious calculation of the compensation data of all the pixel points in each gray level when the LCD display panel with the Mura phenomenon is corrected in the prior art. , reduce the calculation difficulty, reduce the amount of calculation, reduce the consumption of hardware storage space, ensure the Mura compensation effect, save time and effort, simple and fast.
  • the present invention provides a Mura phenomenon compensation method, comprising the following steps:
  • Step 1 provides an LCD display panel, and divides the LCD display panel into a plurality of display partitions arranged in an array, wherein M and N are integers greater than 1, and each display partition includes M rows and N columns. Pixels, less than M ⁇ N pixels at the boundary of the LCD display panel are regarded as a boundary display partition;
  • Step 2 Select K gradations including 0 gradation and maximum gradation, K is a positive integer, and divide 0 to the maximum gradation into (K-1) gradation intervals; each includes M ⁇ N
  • the pre-selected pixel points of the determined position of the mth row and the nth column are selected in the display partitions of the pixel points, wherein 1 ⁇ m ⁇ M, 1 ⁇ n ⁇ N, and the gray of the preselected pixel points in the K gray scales is obtained.
  • Degree compensation data
  • Step 3 Calculate a first horizontal interpolation coefficient A1, a second horizontal interpolation coefficient A2, a first vertical interpolation coefficient B1, a second vertical interpolation coefficient B2, and a first gray interpolation coefficient C1 of the obtained pixel in the corresponding display partition. And a second grayscale interpolation coefficient C2;
  • Step 4 Calculate the gradation compensation data d of the gradation of the pixel point in the non-boundary display partition by using formula (1) according to the gradation compensation data of the nearest four preselected pixel points around the position where the pixel is located:
  • d1 and d5 are two boundary grays of the gray-scale interval in which the pre-selected pixel points in the upper left corner of the rectangle formed by the nearest four pre-selected pixel points around the position of the obtained pixel point are located in the gray level of the pixel point sought.
  • Gray-scale compensation data, d2 and d6 are the gray-scale intervals of the pre-selected image points in the upper right corner of the rectangle formed by the nearest four pre-selected pixel points around the position where the pixel point is located.
  • the grayscale compensation data of the two boundary gray scales, d3 and d7 are the preselected pixel points in the lower left corner of the rectangle formed by the nearest four preselected pixel points around the position where the pixel point is located, at the gray level of the pixel point sought.
  • the gray-scale compensation data of the two boundary gray levels of the gray-scale interval at which the d4 and d8 are the pre-selected pixel points in the lower right corner of the rectangle formed by the nearest four pre-selected pixel points around the position of the obtained pixel point in the requested pixel The gradation compensation data of the two boundary gradations of the gray interval in which the gradation is located.
  • the method for compensating the Mura phenomenon further includes: Step 5: selecting, in each boundary display partition, the mth row or the nth column or the pixel closest to the mth row and the nth column as preselected pixel points, and displaying the partition in each boundary
  • the gray compensation data of the known K gradations of the preselected pixels is calculated by using formula (2) to calculate the gradation compensation data of the preselected pixels in each boundary display partition at an arbitrary gradation, and the corresponding boundary display partitions are other
  • the gradation compensation data of the pixel is the same as the gradation compensation data of the preselected pixel;
  • d1 is the gradation compensation data of the right boundary of the gradation interval where the gradation of the preselected pixel is located
  • d2 is the gradation compensation data of the left boundary of the gradation interval where the gradation of the preselected pixel is located
  • the first gradation interpolation coefficient C1 is a ratio of the difference between the gradation of the gradation and the right boundary of the gradation interval and the length of the entire gradation interval
  • the second gradation interpolation coefficient C2 is the gradation of the gradation and the left boundary of the gradation interval. The difference between the difference and the length of the entire gray interval.
  • the first gray interpolation coefficient C1 is the ratio of the difference between the gray level of the obtained pixel point and the right boundary of the gray interval and the length of the entire gray interval
  • the second gray-scale interpolation coefficient C2 is a ratio of a difference between a gray level of the obtained pixel point and a left boundary of the gray-scale interval in which the pixel point is located, and a length of the entire gray-scale interval.
  • the four most preselected pixel points around the position where the pixel is located are respectively a preselected pixel of the display partition where the pixel is located, and a preselected display partition adjacent to the right of the display partition where the pixel is located.
  • the preselected pixel points of the determined position of the first row and the first column are selected in each display partition including M ⁇ N pixels; in the step 5, the first selection is performed in each of the boundary display partitions.
  • the pixel of the 1st column of 1 row is used as a preselected pixel.
  • the step 2 four memories are provided, which are first, second, third, and fourth memories respectively.
  • the first memory Gray-scale compensation data for pre-selected pixel points in odd-numbered rows of odd-numbered columns in K gradations
  • second memory for storing gray-scale compensation data of K gradations in pre-selected pixel points in odd-numbered rows and even columns
  • the three memories are used for storing the gray-scale compensation data of the pre-selected pixel points in the even-numbered rows of the odd-numbered columns in the K gray scales
  • the fourth memory is used for storing the gray-scale compensation data of the K-gradations of the pre-selected pixel points located in the even-numbered even columns.
  • the maximum gray level in the step 2 is 255 gray scales.
  • the gray scale compensation data d of the preselected pixel point at an arbitrary gray level is calculated according to formula (2):
  • d1 is the gradation compensation data of the right boundary of the gradation interval where the gradation of the preselected pixel is located
  • d2 is the gradation compensation data of the left boundary of the gradation interval where the gradation of the preselected pixel is located
  • the first gradation interpolation coefficient C1 is a ratio of the difference between the gradation of the gradation and the right boundary of the gradation interval and the length of the entire gradation interval
  • the second gradation interpolation coefficient C2 is the gradation of the gradation and the left boundary of the gradation interval. The difference between the difference and the length of the entire gray interval.
  • the gradation compensation data d of the gradation in which the pixel is located is calculated by the formula (3):
  • d1 is the gradation compensation data of the pre-selected pixel point in the upper left corner of the rectangle formed by the nearest four preselected pixel points around the position where the pixel point is located
  • d2 is the pixel point obtained by the pixel position
  • the gray-scale compensation data of the pre-selected pixel in the upper right corner of the rectangle formed by the nearest four pre-selected pixels around the position is the gray-scale compensation data of the gray level of the pixel to be obtained
  • d3 is the nearest four pre-selected pixels around the position where the pixel is located.
  • the pre-selected pixel points in the lower left corner of the rectangle formed by the dot are the gradation compensation data of the gray level of the pixel point sought, and d4 is the pre-selection of the lower right corner of the rectangle formed by the nearest four pre-selected pixel points around the position of the obtained pixel point.
  • the invention also provides a Mura phenomenon compensation method, comprising the following steps:
  • Step 1 provides an LCD display panel, and divides the LCD display panel into a plurality of display partitions arranged in an array, wherein M and N are integers greater than 1, and each display partition includes M rows and N columns. Pixels, less than M ⁇ N pixels at the boundary of the LCD display panel are regarded as a boundary display partition;
  • Step 2 Select K gradations including 0 gradation and maximum gradation, K is a positive integer, and divide 0 to the maximum gradation into (K-1) gradation intervals; each includes M ⁇ N
  • the pre-selected pixel points of the determined position of the mth row and the nth column are selected in the display partitions of the pixel points, wherein 1 ⁇ m ⁇ M, 1 ⁇ n ⁇ N, and the gray of the preselected pixel points in the K gray scales is obtained.
  • Degree compensation data
  • Step 3 Calculate a first horizontal interpolation coefficient A1, a second horizontal interpolation coefficient A2, a first vertical interpolation coefficient B1, a second vertical interpolation coefficient B2, and a first gray interpolation coefficient C1 of the obtained pixel in the corresponding display partition. And a second grayscale interpolation coefficient C2;
  • Step 4 Calculate the gradation compensation data d of the gradation of the pixel point in the non-boundary display partition by using formula (1) according to the gradation compensation data of the nearest four preselected pixel points around the position where the pixel is located:
  • d1 and d5 are two boundary grays of the gray-scale interval in which the pre-selected pixel points in the upper left corner of the rectangle formed by the nearest four pre-selected pixel points around the position of the obtained pixel point are located in the gray level of the pixel point sought.
  • Gray-scale compensation data, d2 and d6 are the gray-scale intervals of the pre-selected pixel points in the upper right corner of the rectangle formed by the nearest four pre-selected pixel points around the position where the pixel is located.
  • the grayscale compensation data of the two boundary gray scales, d3 and d7 are the preselected pixel points in the lower left corner of the rectangle formed by the nearest four preselected pixel points around the position where the pixel point is located, at the gray level of the pixel point sought
  • the method further includes: step 5, selecting, in each of the boundary display partitions, the mth row or the nth column closest to the mth row and the nth column as the preselected pixel points, and displaying the preselected pixel points in the partition through each boundary Knowing the gray-scale compensation data of K gray scales, using formula (2) to calculate the gray-scale compensation data of the pre-selected pixel points in each boundary display partition in arbitrary gray scales, and correspondingly displaying the gray-scale compensation of other pixels in the partition.
  • the data is the same as the grayscale compensation data of the preselected pixel;
  • d1 is the gradation compensation data of the right boundary of the gradation interval where the gradation of the preselected pixel is located
  • d2 is the gradation compensation data of the left boundary of the gradation interval where the gradation of the preselected pixel is located
  • the first gradation interpolation coefficient C1 is a ratio of the difference between the gradation of the gradation and the right boundary of the gradation interval and the length of the entire gradation interval
  • the second gradation interpolation coefficient C2 is the gradation of the gradation and the left boundary of the gradation interval. The ratio of the difference to the length of the entire gray interval;
  • step 3
  • the first gray interpolation coefficient C1 is the ratio of the difference between the gray level of the obtained pixel point and the right boundary of the gray interval and the length of the entire gray interval
  • the second gray-scale interpolation coefficient C2 is a ratio of a difference between a gray level of the obtained pixel point and a left boundary of the gray-scale interval in which the pixel point is located, and a length of the entire gray-scale interval;
  • the four preselected pixel points around the position where the pixel point is located are respectively the preselected pixel of the display partition where the pixel is located, and the display partition adjacent to the right of the display partition where the pixel is located.
  • the invention provides a method for compensating the Mura phenomenon.
  • a pre-selected pixel point of a certain position is selected in each display partition and obtained in an individual selection.
  • the gradation compensation data of the gradation is calculated, and then the interpolation coefficients of the obtained pixel points in the corresponding display partitions are calculated, and the compensation data of the partial pixels in the individual gray levels and the interpolation coefficients of the obtained pixel points are interpolated.
  • the grayscale compensation data of all the pixels in all gray levels reduces the calculation difficulty, reduces the calculation amount, reduces the consumption of hardware storage space, and ensures the Mura compensation effect, saving time and labor, and being simple and fast.
  • FIG. 1 is a flow chart of a method for compensating for a Mura phenomenon according to the present invention
  • FIG. 2 is a schematic diagram of dividing a display partition and preselected pixel points on a display panel in the Mura phenomenon compensation method of the present invention
  • FIG. 3 is a schematic diagram showing the relationship between eight known gradation compensation data and six interpolation coefficients of a pixel point obtained in the Mura phenomenon compensation method of the present invention
  • FIG. 4 is a schematic diagram of a method for compensating a Mura phenomenon according to the present invention, in which a display partition including 8 ⁇ 8 pixels is taken as an example, and a pixel of a first row and a first column is selected as a preselected pixel in a display partition;
  • FIG. 5 is a numerical table corresponding to the first horizontal interpolation coefficient A1 and the second horizontal interpolation coefficient A2 of the pixel points obtained from the left to right columns in the display partition shown in FIG. 4;
  • FIG. 6 is a numerical table corresponding to a first longitudinal interpolation coefficient B1 and a second longitudinal interpolation coefficient B2 of pixel points obtained from top to bottom in the display partition shown in FIG. 4;
  • FIG. 7 is a diagram showing an example of a method of generating a first grayscale interpolation coefficient C1 and a second grayscale interpolation coefficient C2 in the Mura phenomenon compensation method of the present invention
  • FIG. 8 is a schematic diagram showing the relationship between the gradation compensation data of the gradation obtained by the preselected pixel points and the gradation compensation data of the boundary gradation of the gray interval in the Mura phenomenon compensation method according to the present invention.
  • the present invention provides a Mura phenomenon compensation method, which includes the following steps:
  • Step 1 Providing an LCD display panel including X ⁇ Y (1 ⁇ X ⁇ 8192, 1 ⁇ Y ⁇ 8192) pixels, as shown in FIG. 2, dividing the LCD display panel into a plurality of array rows For the display partition of the cloth, let M and N be integers greater than 1. Each display partition includes M rows and N columns (1 ⁇ M ⁇ 8192, 1 ⁇ N ⁇ 8192) pixels, and the LCD display panel boundary is less than M. ⁇ N pixels are also treated as a boundary display partition.
  • Step 2 Select K gray scales including 0 gray scale and maximum gray scale, K is a positive integer, and divide 0 to the maximum gray scale into (K-1) gray scale intervals, where 1 ⁇ K ⁇ 999, For example, it is preferable that the maximum gray scale is 255 gray scales, and the six gray scales of 0 gray scale, 16 gray scale, 32 gray scale, 64 gray scale, 128 gray scale, and 255 gray scale are selected to divide the 0 to 255 gray scale into five.
  • the grayscale interval is (0,16), (16,32), (32,64), (64,128), (128,255); as shown in FIG.
  • the preselected pixel point P of the determined position of the first row and the first column is selected in each of the display sections including M ⁇ N pixels.
  • the step 2 provides four memories, which are first, second, third, and fourth memories respectively.
  • the first A memory is used for storing grayscale compensation data of K gray scales of preselected pixel points P located in odd rows of odd columns
  • a second memory is used for storing gray scales of K gray scales of preselected pixel points P located in odd rows and even columns.
  • the compensation data the third memory is used for storing the gray-scale compensation data of the pre-selected pixel points P in the even-numbered rows of the odd-numbered columns in the K-gradations, and the fourth memory is used to store the pre-selected pixel points P in the even-numbered even-numbered columns in the K grays. Degree of grayscale compensation data.
  • Step 3 in combination with FIG. 2 and FIG. 3, calculate a first horizontal interpolation coefficient A1, a second horizontal interpolation coefficient A2, a first vertical interpolation coefficient B1, and a second vertical interpolation coefficient B2 of the obtained pixel in the corresponding display partition.
  • the first gray interpolation coefficient C1 is the ratio of the difference between the gray level of the obtained pixel point and the right boundary of the gray interval and the length of the entire gray interval
  • the second gray-scale interpolation coefficient C2 is a ratio of a difference between a gray level of the obtained pixel point and a left boundary of the gray-scale interval in which the pixel point is located, and a length of the entire gray-scale interval.
  • the LCD display panel is divided into 135 ⁇ 240 display partitions, and each display partition includes 8 rows and 8 columns of pixel points, K
  • the gradation is 0 gradation, 16 gradation, 32 gradation, 64 gradation, 128 gradation, and 255 gradation, and 6 pixels are selected, and the pixels in the first row and the first column in each display segment are selected as preselected images.
  • the prime point P, the first, second, third, and fourth memories each have a bit depth of 48 bits, corresponding to preselected pixels for storing odd rows of odd columns, odd rows of even columns, even rows of odd columns, and even rows of even columns.
  • P gray's 6 gray levels each with 8 bits of grayscale compensation data, then:
  • the first horizontal interpolation coefficient A1 of the pixel points from the left to the right column to the eighth column is 8 pixel points of each row from left to right.
  • the first horizontal interpolation coefficient A1 is 8/8, 7/8, 6/8, 5/8, 4/8, 3/8, 2/8, and 1/8, respectively, and the corresponding second horizontal interpolation coefficient A2 is 0/8, 1/8, 2/8, 3/8, 4/8, 5/8, 6/8 and 7/8.
  • the first longitudinal interpolation coefficient B1 of the pixel points obtained from the top to bottom rows is 8/8, 7/8, 6/8, 5/8, 4/8, 3/8, 2/8, and 1/8
  • the corresponding second longitudinal interpolation coefficient B2 is 0/8, 1/8, 2/8, 3/8, 4/8, 5/8, 6/8 and 7/8.
  • the maximum gray scale is 255 gray scale, and the six gray scales of 0 gray scale, 16 gray scale, 32 gray scale, 64 gray scale, 128 gray scale, and 255 gray scale are selected to divide the 0 to 255 gray scale into five gray scales.
  • the interval is (0,16), (16,32), (32,64), (64,128), (128,255) as an example, and the 8-bit binary number 10,000,000 is regarded as 1, then in the calculation
  • a grayscale interpolation coefficient C1 and a second grayscale interpolation coefficient C2 are used: the first grayscale interpolation coefficient C1 and the second grayscale interpolation coefficient C2 are both set to an 8-bit binary number, and the highest bit is an integer bit, and the rest Bits are decimal places.
  • the gray level interval in which the gradation is obtained is determined based on the 8-bit binary gradation data signal input from the obtained pixel point. Specifically, if the highest bit of the 8-bit binary gradation data signal input by the pixel is 1, the gradation is in the (128, 255) gray interval, and when the input gradation data is less than 11,000,000, the first The decimal place of the gray interpolation coefficient C1 is the lower seven bits of the input gray data signal, the integer bit is 0, and when the input gray data is greater than or equal to 11,000,000, the decimal place of the first gray interpolation coefficient C1 is the input gray.
  • the sixth digit of the first grayscale interpolation coefficient C1 is the lower six digits of the input grayscale data signal, the remaining low digits are complemented by 0, the integer digits are taken as 0, and the second gray is used.
  • Degree interpolation coefficient C2 10,000,000-C1; if the upper two bits of the input gray data signal are 0 and the third bit is 1, the gray level is in the (32, 64) gray interval, and the first gray interpolation coefficient
  • the lower five digits of C1 are the lower five digits of the input grayscale data signal, and the remaining lower digits are complemented by 0.
  • the upper four bits of the input gray data signal are 0, and the gray level obtained is in the (0, 16) gray interval, and the first gray interpolation is performed.
  • the input gradation data signal is 00, 101, 011
  • the first gradation interpolation coefficient C1 is 00, 101, 100
  • the second gradation interpolation coefficient C2 is 01, 010, 100.
  • Step 4 Calculate the gradation compensation data d of the gradation of the pixel point in the non-boundary display partition according to formula (1) according to the gradation compensation data of the nearest four preselected pixel points P around the position where the pixel is located:
  • d1 and d5 are preselected pixel points P in the upper left corner of the rectangle formed by the nearest four preselected pixel points P around the position where the pixel point is located, at the gradation of the pixel point sought.
  • the gray-scale compensation data of the two boundary gray levels of the gray-scale interval, d2 and d6 are the pre-selected pixel points P in the upper right corner of the rectangle formed by the nearest four pre-selected pixel points P around the position where the pixel point is located.
  • the gradation compensation data of the two boundary gradations of the gradation interval in which the gradation of the pixel is located and d3 and d7 are the lower left corners of the rectangle formed by the nearest four preselected pixel points P around the position where the pixel point is located.
  • the pre-selected pixel point P is the gradation compensation data of the two boundary gradations of the gray-scale interval in which the gradation of the pixel is located, and d4 and d8 are the four pre-selected pixel points P around the position where the pixel point is located.
  • the pre-selected pixel point P in the lower right corner of the formed rectangle is the gradation compensation data of the two boundary gradations of the gradation interval in which the gradation of the obtained pixel point is located.
  • the four preselected pixel points P around the position where the pixel point is located are respectively the preselected pixel point P of the display partition where the pixel point is located, and the display partition where the pixel point is located.
  • the gradation compensation data d of the preselected pixel point P at an arbitrary gradation is calculated according to the formula (2):
  • d1 is the gradation compensation data of the right boundary of the gradation interval where the gradation of the preselected pixel P is located
  • d2 is the gradation of the preselected pixel P.
  • the grayscale compensation data of the left boundary of the grayscale interval; the first grayscale interpolation coefficient C1 is the ratio of the difference between the grayscale and the right boundary of the grayscale interval and the length of the entire grayscale interval, and the second grayscale interpolation
  • the coefficient C2 is the ratio of the difference between the desired gradation and the left boundary of the gradation interval to the length of the entire gradation interval.
  • the gradation compensation data d of the gradation in which the pixel point is located can be calculated by the formula (3):
  • d1 is the gradation compensation of the pre-selected pixel point P in the upper left corner of the rectangle formed by the nearest four preselected pixel points P around the position where the pixel point is located.
  • Data d2 is the gradation compensation data of the pre-selected pixel point P in the upper right corner of the rectangle formed by the nearest four preselected pixel points P around the position where the pixel point is located, where d3 is the desired.
  • the gray-scale compensation data of the pre-selected pixel point P in the lower left corner of the rectangle formed by the nearest four pre-selected pixel points P around the position of the pixel is the closest to the position of the pixel where the pixel is located.
  • A1 is the first horizontal interpolation coefficient of the obtained pixel point
  • A2 is the second horizontal interpolation coefficient of the obtained pixel point
  • B1 is the first longitudinal interpolation coefficient of the obtained pixel point
  • B2 is the second longitudinal interpolation of the obtained pixel point.
  • the Mura phenomenon compensation method of the present invention further includes:
  • Step 5 Select, in each boundary display partition, the mth row or the nth column closest to the mth row and the nth column as the preselected pixel P, and display the known preselected pixel point P in the partition through each boundary.
  • K gradation gray compensation data using equation (2) to calculate the gradation compensation data of the preselected pixel point P at an arbitrary gradation, corresponding to the boundary display gradation compensation data of other pixels in the partition and the preselected pixel
  • the gray scale compensation data of point P is the same.
  • d1 is the gradation compensation data of the right boundary of the gradation interval where the gradation of the preselected pixel point P is located
  • d2 is the gamma compensation of the left boundary of the gradation interval where the gradation of the preselected pixel P is located
  • the first gray-scale interpolation coefficient C1 is a ratio of the difference between the obtained gray level and the right boundary of the gray-scale interval and the length of the entire gray-scale interval
  • the second gray-scale interpolation coefficient C2 is the gray-scale and gray-scale interval The ratio of the difference between the left boundary to the length of the entire gray interval.
  • step 5 it is also preferable to select the pixel of the first row and the first column in each of the boundary display sections as the preselected pixel point P.
  • the Mura phenomenon compensation method divides an LCD display panel into a plurality of display partitions, selects a pre-selected pixel point of a certain position in each display partition, and acquires the selected gray scale in the selected gray scale.
  • the gray scale compensation data is then calculated for each interpolation coefficient of the pixel obtained in the corresponding display partition, and all the grays can be calculated by using the compensation data of the partial pixels in the individual gray levels and the interpolation coefficients of the obtained pixel points.
  • the gray level compensation data of all the pixels in the degree reduces the calculation difficulty, reduces the amount of calculation, and reduces the consumption of hardware storage space.
  • the interpolation calculation can ensure that the compensation data of each pixel point is not much different from the actual compensation data, and the effect that the naked eye can not be recognized can be effectively improved, the Mura phenomenon is effectively improved, the time and labor are saved, and the method is simple and quick.

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Abstract

一种Mura现象补偿方法，通过将LCD显示面板划分为多个显示分区，在各显示分区中均选择一确定位置的预选像素点并获取其在个别选定灰度的灰度补偿数据，然后计算所求像素点在相应显示分区内的各项插值系数，能够利用个别灰度级中部分像素点的补偿数据和所求像素点的各项插值系数插值计算出所有灰度级中所有像素点的灰度补偿数据。该方法降低了计算难度，减少了运算量，减少了硬件存储空间的消耗，并保证了Mura补偿效果。

Description

Mura现象补偿方法 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种Mura现象补偿方法。
背景技术
液晶显示器(Liquid Crystal Display，LCD)具有机身薄、省电、无辐射等众多优点，迅速成为目前市场上的主流产品，得到了广泛的应用，如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等，在平板显示领域中占主导地位。
随着LCD显示器向着更轻、更薄、更大的方向发展，因实际制程上的一些不可控因素，使LCD显示面板各处的物理特性存在差异，导致在大于一个像素点的范围内，显示纯灰度图像时亮度不均匀的现象，即业界所称的Mura现象。
Mura现象已经成为制约LCD发展的瓶颈。通过提高工艺水平或者提高原材料纯度等方法可降低Mura现象的发生概率。对于已经制作完成的LCD显示面板，其物理特性已经定型，此时可以通过灰度补偿的方式来校正像素点的亮度，进而改善Mura现象。
灰度补偿是通过改变像素的灰度值来实现亮度均匀性的改善：即在显示纯灰度图像时，对于显示亮度比较高的像素施加较低的灰度值，对于显示亮度比较低的像素，施加较高的灰度值，使得灰度补偿后各像素的亮度接近一致，实现Mura现象的改善。
现有的补偿Mura现象的技术通常需要对LCD显示面板全屏幕所有像素点分别在每个灰度级的数据进行计算与补偿，数据量庞大，对硬件存储空间的要求较高。
随着LCD显示面板尺寸的增加，现有的补偿Mura现象的技术会更加费时费力，因此需要对Mura现象的补偿方法进行改善。
发明内容
本发明的目的在于提供一种Mura现象补偿方法，能够解决现有技术在校正存在Mura现象的LCD显示面板时需要计算所有像素点分别在每个灰度级的补偿数据而造成的费时费力的问题，降低计算难度，减少运算量，减少硬件存储空间的消耗，保证Mura补偿效果，省时省力，简单快捷。
为实现上述目的，本发明提供一种Mura现象补偿方法，包括以下步骤：
步骤1、提供一LCD显示面板，将所述LCD显示面板划分为多个呈阵列式排布的显示分区，设M、N均为大于1的整数，每一显示分区均包括M行、N列像素点，LCD显示面板边界处不足M×N个像素点视为一个边界显示分区；
步骤2、选取包括0灰度和最大灰度在内的K个灰度，K为正整数，将0至最大灰度分为(K-1)个灰度区间；在每个包括M×N个像素点的显示分区中均选择第m行第n列这一确定位置的预选像素点，其中1≤m≤M，1≤n≤N，获取所述预选像素点在K个灰度的灰度补偿数据；
步骤3、计算所求像素点在相应显示分区内的第一横向插值系数A1、第二横向插值系数A2、第一纵向插值系数B1、第二纵向插值系数B2、第一灰度插值系数C1、及第二灰度插值系数C2；
步骤4、根据所求像素点所在位置周围最近的四个预选像素点的灰度补偿数据，利用公式(1)计算非边界显示分区中所求像素点所在灰度的灰度补偿数据d：
d＝C1×(B1×(d1×A1+d2×A2)+B2×(d3×A1+d4×A2))+C2×(B1×(d5×A1+d6×A2)+B2×(d7×A1+d8×A2))    (1)
其中，d1和d5为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左上角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d2和d6为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右上角的预选像点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d3和d7为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左下角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d4和d8为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右下角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据。
所述Mura现象补偿方法还包括：步骤5、在每个边界显示分区中选取第m行第n列或距第m行第n列最近的像素点作为预选像素点，通过每个边界显示分区中的预选像素点的已知K个灰度的灰度补偿数据，运用公式(2)计算出每个边界显示分区中的预选像素点在任意灰度的灰度补偿数据，相应边界显示分区内其他像素点的灰度补偿数据和该预选像素点的灰度补偿数据相同；
d＝d1×C1+d2×C2                   (2)
其中，d1为该预选像素点所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点所求灰度所处的灰度区间左边界的灰度补偿数据；第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值。
所述步骤3中：
0≤A1≤1，0≤A2≤1；且对于同一个所求像素点A1+A2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点的所在列起依次向右、到达该显示分区的右边界后转至左边界，再依次向右直至到达该预选像素点所在列的左边相邻一列，各列所求像素点的第一横向插值系数A1依次为N/N，N-1/N，……，1/N，第二横向插值系数A2依次为0/N，1/N，……，N-1/N；
0≤B1≤1，0≤B2≤1；且对于同一个所求像素点B1+B2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点的所在行起依次向下、到达该显示分区的下边界后转至上边界，再依次向下直至到达该预选像素点所在行的上边相邻一行，各行所求像素点的第一纵向插值系数B1依次为M/M，M-1/M，……，1/M，第二纵向插值系数B2依次为0/M，1/M，……，M-1/M；
根据输入所求像素点的灰度数据信号与已知的K个灰度进行比较，得到所求像素点所在灰度所处的灰度区间；0≤C1≤1，0≤C2≤1；且对于同一个所求像素点C1+C2＝1；所述第一灰度插值系数C1为所求像素点所在灰度与其所处灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求像素点所在灰度与其所处灰度区间左边界的差值与整个灰度区间长度的比值。
所述步骤4中，所求像素点所在位置周围最近的四个预选像素点分别为所求像素点所在显示分区的预选像素点、与所求像素点所在显示分区右边相邻的显示分区的预选像素点、与所求像素点所在显示分区下边相邻的显示分区的预选像素点、及与所求像素点所在显示分区右下角相邻的显示分区的预选像素点。
所述步骤2中在每个包括M×N个像素点的显示分区中均选择第1行第1列这一确定位置的预选像素点；所述步骤5中在每个边界显示分区中选取第1行第1列的像素点作为预选像素点。
所述步骤2中提供四个存储器，分别为第一、第二、第三、第四存储器，对于由多个呈阵列式排布的预选像素点组成的阵列，所述第一存储器 用于存放位于奇数行奇数列的预选像素点在K个灰度的灰度补偿数据、第二存储器用于存放位于奇数行偶数列的预选像素点在K个灰度的灰度补偿数据、第三存储器用于存放位于偶数行奇数列的预选像素点在K个灰度的灰度补偿数据、第四存储器用于存放位于偶数行偶数列的预选像素点在K个灰度的灰度补偿数据。
所述步骤2中的最大灰度为255灰度。
当所求像素点为预选像素点时，根据公式(2)计算预选像素点在任意灰度的灰度补偿数据d：
d＝d1×C1+d2×C2              (2)
其中，d1为该预选像素点所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点所求灰度所处的灰度区间左边界的灰度补偿数据；第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值。
当所求像素点所在灰度为所述K个灰度中的其中一个灰度时，所求像素点所在灰度的灰度补偿数据d由公式(3)计算：
d＝(d1×A1+d2×A2)×B1+(d3×A1+d4×A2)×B2          (3)
其中，d1为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左上角的预选像素点在所求像素点所在灰度的灰度补偿数据，d2为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右上角的预选像素点在所求像素点所在灰度的灰度补偿数据，d3为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左下角的预选像素点在所求像素点所在灰度的灰度补偿数据，d4为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右下角的预选像素点在所求像素点所在灰度的灰度补偿数据。
本发明还提供一种Mura现象补偿方法，包括以下步骤：
步骤1、提供一LCD显示面板，将所述LCD显示面板划分为多个呈阵列式排布的显示分区，设M、N均为大于1的整数，每一显示分区均包括M行、N列像素点，LCD显示面板边界处不足M×N个像素点视为一个边界显示分区；
步骤2、选取包括0灰度和最大灰度在内的K个灰度，K为正整数，将0至最大灰度分为(K-1)个灰度区间；在每个包括M×N个像素点的显示分区中均选择第m行第n列这一确定位置的预选像素点，其中1≤m≤M，1≤n≤N，获取所述预选像素点在K个灰度的灰度补偿数据；
步骤3、计算所求像素点在相应显示分区内的第一横向插值系数A1、第二横向插值系数A2、第一纵向插值系数B1、第二纵向插值系数B2、第一灰度插值系数C1、及第二灰度插值系数C2；
步骤4、根据所求像素点所在位置周围最近的四个预选像素点的灰度补偿数据，利用公式(1)计算非边界显示分区中所求像素点所在灰度的灰度补偿数据d：
d＝C1×(B1×(d1×A1+d2×A2)+B2×(d3×A1+d4×A2))+C2×(B1×(d5×A1+d6×A2)+B2×(d7×A1+d8×A2))    (1)
其中，d1和d5为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左上角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d2和d6为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右上角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d3和d7为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左下角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d4和d8为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右下角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据；
还包括：步骤5、在每个边界显示分区中选取第m行第n列或距第m行第n列最近的像素点作为预选像素点，通过每个边界显示分区中的预选像素点的已知K个灰度的灰度补偿数据，运用公式(2)计算出每个边界显示分区中的预选像素点在任意灰度的灰度补偿数据，相应边界显示分区内其他像素点的灰度补偿数据和该预选像素点的灰度补偿数据相同；
d＝d1×C1+d2×C2                 (2)
其中，d1为该预选像素点所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点所求灰度所处的灰度区间左边界的灰度补偿数据；第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值；
其中，所述步骤3中：
0≤A1≤1，0≤A2≤1；且对于同一个所求像素点A1+A2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点的所在列起依次向右、到达该显示分区的右边界后转至左边界，再依次向右直至到达该预选像素点所在列的左边相邻一列，各列所求像素点的第一横向插值 系数A1依次为N/N，N-1/N，……，1/N，第二横向插值系数A2依次为0/N，1/N，……，N-1/N；
0≤B1≤1，0≤B2≤1；且对于同一个所求像素点B1+B2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点的所在行起依次向下、到达该显示分区的下边界后转至上边界，再依次向下直至到达该预选像素点所在行的上边相邻一行，各行所求像素点的第一纵向插值系数B1依次为M/M，M-1/M，……，1/M，第二纵向插值系数B2依次为0/M，1/M，……，M-1/M；
根据输入所求像素点的灰度数据信号与已知的K个灰度进行比较，得到所求像素点所在灰度所处的灰度区间；0≤C1≤1，0≤C2≤1；且对于同一个所求像素点C1+C2＝1；所述第一灰度插值系数C1为所求像素点所在灰度与其所处灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求像素点所在灰度与其所处灰度区间左边界的差值与整个灰度区间长度的比值；
其中，所述步骤4中，所求像素点所在位置周围最近的四个预选像素点分别为所求像素点所在显示分区的预选像素点、与所求像素点所在显示分区右边相邻的显示分区的预选像素点、与所求像素点所在显示分区下边相邻的显示分区的预选像素点、及与所求像素点所在显示分区右下角相邻的显示分区的预选像素点。
本发明的有益效果：本发明提供的一种Mura现象补偿方法，通过将LCD显示面板划分为多个显示分区，在各显示分区中均选择一确定位置的预选像素点并获取其在个别选定灰度的灰度补偿数据，然后计算所求像素点在相应显示分区内的各项插值系数，能够利用个别灰度级中部分像素点的补偿数据和所求像素点的各项插值系数插值计算出所有灰度级中所有像素点的灰度补偿数据，降低了计算难度，减少了运算量，减少了硬件存储空间的消耗，并保证了Mura补偿效果，省时省力，简单快捷。
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其它有益效果显而易见。
附图中，
图1为本发明的Mura现象补偿方法的流程图；
图2为本发明的Mura现象补偿方法中对显示面板划分显示分区及预选像素点的示意图；
图3为本发明的Mura现象补偿方法中所求像素点的8个已知灰度补偿数据与6个插值系数的关系示意图；
图4为本发明的Mura现象补偿方法中以包括8×8个像素点的显示分区为例，在显示分区中选取第1行第1列像素点为预选像素点的示意图；
图5为对应于图4所示的显示分区中从左至右的各列所求像素点的第一横向插值系数A1与第二横向插值系数A2的数值表；
图6为对应于图4所示的显示分区中从上至下的各行所求像素点的第一纵向插值系数B1与第二纵向插值系数B2的数值表；
图7为本发明的Mura现象补偿方法中第一灰度插值系数C1和第二灰度插值系数C2生成方法的一个示例图；
图8为本发明的Mura现象补偿方法中预选像素点所求灰度的灰度补偿数据与其所处的灰度区间的边界灰度的灰度补偿数据之间的关系示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1，本发明提供一种Mura现象补偿方法，包括以下步骤：
步骤1、提供一包括X×Y(1＜X≤8192，1＜Y≤8192)个像素点的LCD显示面板，如图2所示，将所述LCD显示面板划分为多个呈阵列式排布的显示分区，设M、N均为大于1的整数，每一显示分区均包括M行、N列(1＜M≤8192，1＜N≤8192)像素点，LCD显示面板边界处不足M×N个像素点也视为一个边界显示分区。
步骤2、选取包括0灰度和最大灰度在内的K个灰度，K为正整数，将0至最大灰度分为(K-1)个灰度区间，其中1＜K≤999，例如：优选最大灰度为255灰度，选取0灰度、16灰度、32灰度、64灰度、128灰度和255灰度这六个灰度将0至255灰度分为五个灰度区间，分别为(0，16)、(16，32)、(32，64)、(64，128)、(128，255)；如图2所示，在每个包括M×N个像素点的显示分区中均选择第m行第n列这一确定位置的预选像素点P，其中1≤m≤M，1≤n≤N，获取所述预选像素点P在K个灰度的灰度补偿数据，优选的，在每个包括M×N个像素点的显示分区中均选择第1行第1列这一确定位置的预选像素点P。
值得一提的是，该步骤2提供四个存储器，分别为第一、第二、第三、第四存储器，对于由多个呈阵列式排布的预选像素点P组成的阵列，所述第一存储器用于存放位于奇数行奇数列的预选像素点P在K个灰度的灰度补偿数据、第二存储器用于存放位于奇数行偶数列的预选像素点P在K个灰度的灰度补偿数据、第三存储器用于存放位于偶数行奇数列的预选像素点P在K个灰度的灰度补偿数据、第四存储器用于存放位于偶数行偶数列的预选像素点P在K个灰度的灰度补偿数据。
步骤3、结合图2与图3，计算所求像素点在相应显示分区内的第一横向插值系数A1、第二横向插值系数A2、第一纵向插值系数B1、第二纵向插值系数B2、第一灰度插值系数C1、及第二灰度插值系数C2。
其中：0≤A1≤1，0≤A2≤1；且对于同一个所求像素点A1+A2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点P的所在列起依次向右、到达该显示分区的右边界后转至左边界，再依次向右直至到达该预选像素点P所在列的左边相邻一列，各列所求像素点的第一横向插值系数A1依次为N/N，N-1/N，……，1/N，第二横向插值系数A2依次为0/N，1/N，……，N-1/N(若预选像素点P所在列为左边界，则最后一列为右边界)。
0≤B1≤1，0≤B2≤1；且对于同一个所求像素点B1+B2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点P的所在行起依次向下、到达该显示分区的下边界后转至上边界，再依次向下直至到达该预选像素点P所在行的上边相邻一行，各行所求像素点的第一纵向插值系数B1依次为M/M，M-1/M，……，1/M，第二纵向插值系数B2依次为0/M，1/M，……，M-1/M(若预选像素点P所在行为上边界，则最后一行为下边界)。
根据输入所求像素点的灰度数据信号与已知的K个灰度进行比较，得到所求像素点所在灰度所处的灰度区间；0≤C1≤1，0≤C2≤1；且对于同一个所求像素点C1+C2＝1；所述第一灰度插值系数C1为所求像素点所在灰度与其所处灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求像素点所在灰度与其所处灰度区间左边界的差值与整个灰度区间长度的比值。
如图4所示，以LCD显示面板分辨率为1080×1920为例，将所述LCD显示面板划分为135×240个显示分区，每一显示分区均包括8行、8列像素点，K个灰度为0灰度、16灰度、32灰度、64灰度、128灰度和255灰度共6个灰度，选择各个显示分区中第1行、第1列的像素点为预选像 素点P，第一、第二、第三、第四存储器的位深均为48位，分别对应存储奇数行奇数列、奇数行偶数列、偶数行奇数列和偶数行偶数列的预选像素点P的6个灰度级各8位的灰度补偿数据，那么：
如图5所示，在各显示分区中，从左至右的第1列至第8列所求像素点的第一横向插值系数A1即每一行从左至右的8个所求像素点的第一横向插值系数A1依次为8/8、7/8、6/8、5/8、4/8、3/8、2/8和1/8，对应的第二横向插值系数A2依次为0/8、1/8、2/8、3/8、4/8、5/8、6/8和7/8。
如图6所示，从上至下的各行所求像素点的第一纵向插值系数B1即每一列从上至下的8个所求像素点的第一纵向插值系数B1依次为8/8、7/8、6/8、5/8、4/8、3/8、2/8和1/8，对应的第二纵向插值系数B2依次为0/8、1/8、2/8、3/8、4/8、5/8、6/8和7/8。
以最大灰度为255灰度，选取0灰度、16灰度、32灰度、64灰度、128灰度和255灰度这六个灰度将0至255灰度分为五个灰度区间，分别为(0，16)、(16，32)、(32，64)、(64，128)、(128，255)为例，将8位二进制数10,000,000看做1，那么在计算第一灰度插值系数C1与第二灰度插值系数C2时：同样设所述第一灰度插值系数C1和第二灰度插值系数C2均为一个8位二进制数，最高位为整数位，其余位为小数位。根据所求像素点输入的8位二进制灰度数据信号确定所求灰度所处的灰度区间。具体的，如果所求像素点输入的8位二进制灰度数据信号的最高位为1，则所求灰度在(128，255)灰度区间，当输入的灰度数据小于11,000,000时，第一灰度插值系数C1的小数位为输入的灰度数据信号的低七位，整数位取0，当输入的灰度数据大于等于11,000,000时，第一灰度插值系数C1的小数位为输入的灰度数据信号的低七位加1，整数位取0，第二灰度插值系数C2＝10,000,000-C1；如果输入的灰度数据信号的最高位为0，次高位为1，则所求灰度在(64，128)灰度区间，第一灰度插值系数C1的小数位高六位为输入的灰度数据信号的低六位，其余低位用0补上，整数位取0，第二灰度插值系数C2＝10,000,000-C1；如果输入的灰度数据信号的高两位为0，第三位为1，则所求灰度在(32，64)灰度区间，第一灰度插值系数C1的小数位高五位为输入的灰度数据信号的低五位，其余低位用0补上，整数位取0，第二灰度插值系数C2＝10,000,000-C1；如果输入的灰度数据信号的高三位为0，第四位为1，则所求灰度在(16，32)灰度区间，第一灰度插值系数C1的小数位高四位为输入的灰度数据信号的低四位，其余低位用0补上，整数位取0，第二灰度插值系数C2＝10,000,000-C1；如果输入的灰度数据信号的高四位为0，则所求灰度在(0，16)灰度区间，第一灰度插值 系数C1的小数位高四位为输入的灰度数据信号的低四位，其余低位用0补上，整数位取0，第二灰度插值系数C2＝10,000,000-C1。如图7所示，设输入的灰度数据信号为00,101,011，则生成第一灰度插值系数C1为00,101,100，第二灰度插值系数C2为01,010,100。
步骤4、根据所求像素点所在位置周围最近的四个预选像素点P的灰度补偿数据，根据公式(1)计算非边界显示分区中所求像素点所在灰度的灰度补偿数据d：
d＝C1×(B1×(d1×A1+d2×A2)+B2×(d3×A1+d4×A2))+C2×(B1×(d5×A1+d6×A2)+B2×(d7×A1+d8×A2))    (1)
结合图2与图3，其中，d1和d5为由所求像素点所在位置周围最近的四个预选像素点P构成的矩形中左上角的预选像素点P在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d2和d6为由所求像素点所在位置周围最近的四个预选像素点P构成的矩形中右上角的预选像素点P在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d3和d7为由所求像素点所在位置周围最近的四个预选像素点P构成的矩形中左下角的预选像素点P在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d4和d8为由所求像素点所在位置周围最近的四个预选像素点P构成的矩形中右下角的预选像素点P在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据。
优选的，如图2、图4所示，所求像素点所在位置周围最近的四个预选像素点P分别为所求像素点所在显示分区的预选像素点P、与所求像素点所在显示分区右边相邻的显示分区的预选像素点P、与所求像素点所在显示分区下边相邻的显示分区的预选像素点P、及与所求像素点所在显示分区右下角相邻的显示分区的预选像素点P。
特别地，当所求像素点为预选像素点P时，根据公式(2)计算预选像素点P在任意灰度的灰度补偿数据d：
d＝d1×C1+d2×C2                  (2)
结合图2、图3、与图8，其中，d1为该预选像素点P所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点P所求灰度所处的灰度区间左边界的灰度补偿数据；第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值。
特别地，当所求像素点所在灰度为所述K个灰度中的其中一个灰度时，所求像素点所在灰度的灰度补偿数据d可由公式(3)计算：
d＝(d1×A1+d2×A2)×B1+(d3×A1+d4×A2)×B2          (3)
结合图2与图3，其中，d1为由所求像素点所在位置周围最近的四个预选像素点P构成的矩形中左上角的预选像素点P在所求像素点所在灰度的灰度补偿数据，d2为由所求像素点所在位置周围最近的四个预选像素点P构成的矩形中右上角的预选像素点P在所求像素点所在灰度的灰度补偿数据，d3为由所求像素点所在位置周围最近的四个预选像素点P构成的矩形中左下角的预选像素点P在所求像素点所在灰度的灰度补偿数据，d4为由所求像素点所在位置周围最近的四个预选像素点P构成的矩形中右下角的预选像素P点在所求像素点所在灰度的灰度补偿数据。
A1为所求像素点的第一横向插值系数、A2为所求像素点的第二横向插值系数、B1为所求像素点的第一纵向插值系数、B2为所求像素点的第二纵向插值系数B2。
对于边界显示分区中的像素点，由于边界区域可能不足M×N个像素点，也可能不存在相应的四个已知灰度补偿数据的预选像素点P，无法采用公式(1)计算灰度补偿数据，因此，本发明的Mura现象补偿方法还包括：
步骤5、在每个边界显示分区中选取第m行第n列或距第m行第n列最近的像素点作为预选点像素P，通过每个边界显示分区中的预选像素点P的已知K个灰度的灰度补偿数据，运用公式(2)计算出该预选像素点P在任意灰度的灰度补偿数据，相应该边界显示分区内其他像素点的灰度补偿数据和该预选像素点P的灰度补偿数据相同。
d＝d1×C1+d2×C2               (2)
其中，d1为该预选像素点P所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点P所求灰度所处的灰度区间左边界的灰度补偿数据；第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值。
该步骤5中，同样优选在每个边界显示分区中选取第1行第1列的像素点作为预选像素点P。
综上所述，本发明提供的Mura现象补偿方法，通过将LCD显示面板划分为多个显示分区，在各显示分区中均选择一确定位置的预选像素点并获取其在个别选定灰度的灰度补偿数据，然后计算所求像素点在相应显示分区内的各项插值系数，能够利用个别灰度级中部分像素点的补偿数据和所求像素点的各项插值系数插值计算出所有灰度级中所有像素点的灰度补偿数据，降低了计算难度，减少了运算量，减少了硬件存储空间的消耗， 并且利用插值计算可以保证每一像素点的补偿数据和实际需要的补偿数据相差不大，达到肉眼无法识别的效果，有效改善Mura现象，省时省力，简单快捷。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (15)

  1. 一种Mura现象补偿方法，包括以下步骤：
    步骤1、提供一LCD显示面板，将所述LCD显示面板划分为多个呈阵列式排布的显示分区，设M、N均为大于1的整数，每一显示分区均包括M行、N列像素点，LCD显示面板边界处不足M×N个像素点视为一个边界显示分区；
    步骤2、选取包括0灰度和最大灰度在内的K个灰度，K为正整数，将0至最大灰度分为(K-1)个灰度区间；在每个包括M×N个像素点的显示分区中均选择第m行第n列这一确定位置的预选像素点，其中1≤m≤M，1≤n≤N，获取所述预选像素点在K个灰度的灰度补偿数据；
    步骤3、计算所求像素点在相应显示分区内的第一横向插值系数A1、第二横向插值系数A2、第一纵向插值系数B1、第二纵向插值系数B2、第一灰度插值系数C1、及第二灰度插值系数C2；
    步骤4、根据所求像素点所在位置周围最近的四个预选像素点的灰度补偿数据，利用公式(1)计算非边界显示分区中所求像素点所在灰度的灰度补偿数据d：
    d＝C1×(B1×(d1×A1+d2×A2)+B2×(d3×A1+d4×A2))
    +C2×(B1×(d5×A1+d6×A2)+B2×(d7×A1+d8×A2))    (1)
    其中，d1和d5为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左上角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d2和d6为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右上角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d3和d7为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左下角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d4和d8为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右下角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据。
  2. 如权利要求1所述的Mura现象补偿方法，还包括：步骤5、在每个边界显示分区中选取第m行第n列或距第m行第n列最近的像素点作为预选像素点，通过每个边界显示分区中的预选像素点的已知K个灰度的灰度补偿数据，运用公式(2)计算出每个边界显示分区中的预选像素点在任 意灰度的灰度补偿数据，相应边界显示分区内其他像素点的灰度补偿数据和该预选像素点的灰度补偿数据相同；
    d＝d1×C1+d2×C2       (2)
    其中，d1为该预选像素点所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点所求灰度所处的灰度区间左边界的灰度补偿数据；第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值。
  3. 如权利要求1所述的Mura现象补偿方法，其中，所述步骤3中：
    0≤A1≤1，0≤A2≤1；且对于同一个所求像素点A1+A2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点的所在列起依次向右、到达该显示分区的右边界后转至左边界，再依次向右直至到达该预选像素点所在列的左边相邻一列，各列所求像素点的第一横向插值系数A1依次为N/N，N-1/N，……，1/N，第二横向插值系数A2依次为0/N，1/N，……，N-1/N；
    0≤B1≤1，0≤B2≤1；且对于同一个所求像素点B1+B2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点的所在行起依次向下、到达该显示分区的下边界后转至上边界，再依次向下直至到达该预选像素点所在行的上边相邻一行，各行所求像素点的第一纵向插值系数B1依次为M/M，M-1/M，……，1/M，第二纵向插值系数B2依次为0/M，1/M，……，M-1/M；
    根据输入所求像素点的灰度数据信号与已知的K个灰度进行比较，得到所求像素点所在灰度所处的灰度区间；0≤C1≤1，0≤C2≤1；且对于同一个所求像素点C1+C2＝1；所述第一灰度插值系数C1为所求像素点所在灰度与其所处灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求像素点所在灰度与其所处灰度区间左边界的差值与整个灰度区间长度的比值。
  4. 如权利要求1所述的Mura现象补偿方法，其中，所述步骤4中，所求像素点所在位置周围最近的四个预选像素点分别为所求像素点所在显示分区的预选像素点、与所求像素点所在显示分区右边相邻的显示分区的预选像素点、与所求像素点所在显示分区下边相邻的显示分区的预选像素点、及与所求像素点所在显示分区右下角相邻的显示分区的预选像素点。
  5. 如权利要求2所述的Mura现象补偿方法，其中，所述步骤2中在每个包括M×N个像素点的显示分区中均选择第1行第1列这一确定位置 的预选像素点；所述步骤5中在每个边界显示分区中选取第1行第1列的像素点作为预选像素点。
  6. 如权利要求1所述的Mura现象补偿方法，其中，所述步骤2中提供四个存储器，分别为第一、第二、第三、第四存储器，对于由多个呈阵列式排布的预选像素点组成的阵列，所述第一存储器用于存放位于奇数行奇数列的预选像素点在K个灰度的灰度补偿数据、第二存储器用于存放位于奇数行偶数列的预选像素点在K个灰度的灰度补偿数据、第三存储器用于存放位于偶数行奇数列的预选像素点在K个灰度的灰度补偿数据、第四存储器用于存放位于偶数行偶数列的预选像素点在K个灰度的灰度补偿数据。
  7. 如权利要求1所述的Mura现象补偿方法，其中，所述步骤2中的最大灰度为255灰度。
  8. 如权利要求1所述的Mura现象补偿方法，其中，当所求像素点为预选像素点时，根据公式(2)计算预选像素点在任意灰度的灰度补偿数据d：
    d＝d1×C1+d2×C2      (2)
    其中，d1为该预选像素点所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点所求灰度所处的灰度区间左边界的灰度补偿数据；第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值。
  9. 如权利要求1所述的Mura现象补偿方法，其中，当所求像素点所在灰度为所述K个灰度中的其中一个灰度时，所求像素点所在灰度的灰度补偿数据d由公式(3)计算：
    d＝(d1×A1+d2×A2)×B1+(d3×A1+d4×A2)×B2    (3)
    其中，d1为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左上角的预选像素点在所求像素点所在灰度的灰度补偿数据，d2为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右上角的预选像素点在所求像素点所在灰度的灰度补偿数据，d3为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左下角的预选像素点在所求像素点所在灰度的灰度补偿数据，d4为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右下角的预选像素点在所求像素点所在灰度的灰度补偿数据。
  10. 一种Mura现象补偿方法，包括以下步骤：
    步骤1、提供一LCD显示面板，将所述LCD显示面板划分为多个呈阵列式排布的显示分区，设M、N均为大于1的整数，每一显示分区均包括M行、N列像素点，LCD显示面板边界处不足M×N个像素点视为一个边界显示分区；
    步骤2、选取包括0灰度和最大灰度在内的K个灰度，K为正整数，将0至最大灰度分为(K-1)个灰度区间；在每个包括M×N个像素点的显示分区中均选择第m行第n列这一确定位置的预选像素点，其中1≤m≤M，1≤n≤N，获取所述预选像素点在K个灰度的灰度补偿数据；
    步骤3、计算所求像素点在相应显示分区内的第一横向插值系数A1、第二横向插值系数A2、第一纵向插值系数B1、第二纵向插值系数B2、第一灰度插值系数C1、及第二灰度插值系数C2；
    步骤4、根据所求像素点所在位置周围最近的四个预选像素点的灰度补偿数据，利用公式(1)计算非边界显示分区中所求像素点所在灰度的灰度补偿数据d：
    d＝C1×(B1×(d1×A1+d2×A2)+B2×(d3×A1+d4×A2))
    +C2×(B1×(d5×A1+d6×A2)+B2×(d7×A1+d8×A2))     (1)
    其中，d1和d5为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左上角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d2和d6为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右上角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d3和d7为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左下角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据，d4和d8为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右下角的预选像素点在所求像素点所在灰度所处的灰度区间的两个边界灰度的灰度补偿数据；
    还包括：步骤5、在每个边界显示分区中选取第m行第n列或距第m行第n列最近的像素点作为预选像素点，通过每个边界显示分区中的预选像素点的已知K个灰度的灰度补偿数据，运用公式(2)计算出每个边界显示分区中的预选像素点在任意灰度的灰度补偿数据，相应边界显示分区内其他像素点的灰度补偿数据和该预选像素点的灰度补偿数据相同；
    d＝d1×C1+d2×C2      (2)
    其中，d1为该预选像素点所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点所求灰度所处的灰度区间左边界的灰度补偿数据； 第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值；
    其中，所述步骤3中：
    0≤A1≤1，0≤A2≤1；且对于同一个所求像素点A1+A2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点的所在列起依次向右、到达该显示分区的右边界后转至左边界，再依次向右直至到达该预选像素点所在列的左边相邻一列，各列所求像素点的第一横向插值系数A1依次为N/N，N-1/N，……，1/N，第二横向插值系数A2依次为0/N，1/N，……，N-1/N；
    0≤B1≤1，0≤B2≤1；且对于同一个所求像素点B1+B2＝1；在一个包括M×N个像素点的显示分区内，从该显示分区内的预选像素点的所在行起依次向下、到达该显示分区的下边界后转至上边界，再依次向下直至到达该预选像素点所在行的上边相邻一行，各行所求像素点的第一纵向插值系数B1依次为M/M，M-1/M，……，1/M，第二纵向插值系数B2依次为0/M，1/M，……，M-1/M；
    根据输入所求像素点的灰度数据信号与已知的K个灰度进行比较，得到所求像素点所在灰度所处的灰度区间；0≤C1≤1，0≤C2≤1；且对于同一个所求像素点C1+C2＝1；所述第一灰度插值系数C1为所求像素点所在灰度与其所处灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求像素点所在灰度与其所处灰度区间左边界的差值与整个灰度区间长度的比值；
    其中，所述步骤4中，所求像素点所在位置周围最近的四个预选像素点分别为所求像素点所在显示分区的预选像素点、与所求像素点所在显示分区右边相邻的显示分区的预选像素点、与所求像素点所在显示分区下边相邻的显示分区的预选像素点、及与所求像素点所在显示分区右下角相邻的显示分区的预选像素点。
  11. 如权利要求10所述的Mura现象补偿方法，其中，所述步骤2中在每个包括M×N个像素点的显示分区中均选择第1行第1列这一确定位置的预选像素点；所述步骤5中在每个边界显示分区中选取第1行第1列的像素点作为预选像素点。
  12. 如权利要求10所述的Mura现象补偿方法，其中，所述步骤2中提供四个存储器，分别为第一、第二、第三、第四存储器，对于由多个呈阵列式排布的预选像素点组成的阵列，所述第一存储器用于存放位于奇数 行奇数列的预选像素点在K个灰度的灰度补偿数据、第二存储器用于存放位于奇数行偶数列的预选像素点在K个灰度的灰度补偿数据、第三存储器用于存放位于偶数行奇数列的预选像素点在K个灰度的灰度补偿数据、第四存储器用于存放位于偶数行偶数列的预选像素点在K个灰度的灰度补偿数据。
  13. 如权利要求10所述的Mura现象补偿方法，其中，所述步骤2中的最大灰度为255灰度。
  14. 如权利要求10所述的Mura现象补偿方法，其中，当所求像素点为预选像素点时，根据公式(2)计算预选像素点在任意灰度的灰度补偿数据d：
    d＝d1×C1+d2×C2        (2)
    其中，d1为该预选像素点所求灰度所处的灰度区间右边界的灰度补偿数据，d2为该预选像素点所求灰度所处的灰度区间左边界的灰度补偿数据；第一灰度插值系数C1为所求灰度与灰度区间右边界的差值与整个灰度区间长度的比值，所述第二灰度插值系数C2为所求灰度与灰度区间左边界的差值与整个灰度区间长度的比值。
  15. 如权利要求10所述的Mura现象补偿方法，其中，当所求像素点所在灰度为所述K个灰度中的其中一个灰度时，所求像素点所在灰度的灰度补偿数据d由公式(3)计算：
    d＝(d1×A1+d2×A2)×B1+(d3×A1+d4×A2)×B2     (3)
    其中，d1为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左上角的预选像素点在所求像素点所在灰度的灰度补偿数据，d2为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右上角的预选像素点在所求像素点所在灰度的灰度补偿数据，d3为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中左下角的预选像素点在所求像素点所在灰度的灰度补偿数据，d4为由所求像素点所在位置周围最近的四个预选像素点构成的矩形中右下角的预选像素点在所求像素点所在灰度的灰度补偿数据。
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