CN108538264B - Mura compensation method and device of display panel - Google Patents
Mura compensation method and device of display panel Download PDFInfo
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Abstract
The invention provides a mura compensation method and a mura compensation device for a display panel. According to the mura compensation method of the display panel, one pixel selected in each compensation area is used as a compensation pixel, compensation data corresponding to each compensation pixel is measured and stored, compensation data of other pixels except the compensation pixel in each compensation area is calculated according to the compensation data corresponding to each compensation pixel and a preset double cubic interpolation algorithm, and compensation data of other pixels except the compensation pixel in each compensation area is calculated by using the double cubic interpolation algorithm.
Description
Technical Field
The invention relates to the technical field of display, in particular to a mura compensation method and device of a display panel.
Background
Liquid Crystal Displays (LCDs) have many advantages such as thin body, power saving, no radiation, and the like, and are widely used. Such as: liquid crystal televisions, mobile phones, Personal Digital Assistants (PDAs), digital cameras, computer screens, notebook computer screens, or the like, are dominant in the field of flat panel displays.
Most of the existing liquid crystal displays in the market are backlight liquid crystal displays (lcds), which include a liquid crystal display panel and a backlight module (backlight module). The liquid crystal display panel operates on the principle that liquid crystal molecules are filled between a thin film Transistor Array Substrate (TFT Array Substrate) and a color filter Substrate (color filter, CF), and driving voltages are applied to the two substrates to control the rotation direction of the liquid crystal molecules, so that light of the backlight module is refracted out to generate a picture.
Due to defects in the manufacturing process of the liquid crystal display device, the brightness of the display panel of the produced liquid crystal display device is often uneven, and various traces, namely mura phenomenon, appear. In order to improve the brightness uniformity of the display panel, the prior art performs mura compensation (demura) on the display panel, specifically, a professional measurement camera is used to shoot a display image of the liquid crystal display device, and a brightness difference between a central position and a peripheral position of the image is obtained to obtain compensation data, so that the brightness of the peripheral position is consistent with the brightness of the central position.
In order to save storage space and reduce production cost, in the prior art, usually, compensation data of all pixels are not stored, but a display panel is divided into a plurality of regions to be compressed, the compensation data of one pixel is selected to be stored in each region, and the compensation data of other pixels are obtained by performing bilinear interpolation on the stored compensation data of the pixels.
Disclosure of Invention
The invention aims to provide a mura compensation method of a display panel, which can make image transition smoother, reduce saw teeth, improve mura compensation effect and improve picture quality.
The invention also aims to provide a mura compensation device of a display panel, which can make image transition smoother, reduce saw teeth, improve mura compensation effect and improve picture quality.
In order to achieve the above object, the present invention provides a mura compensation method of a display panel, comprising the steps of:
step S1, dividing the display panel into a plurality of compensation regions, each compensation region including a plurality of pixels arranged in an array;
step S2, selecting a pixel in each compensation area as a compensation pixel, and measuring and storing compensation data corresponding to each compensation pixel;
step S3, calculating compensation data of other pixels except the compensation pixel in each compensation area according to the compensation data corresponding to each compensation pixel and a preset double cubic interpolation algorithm;
and step S4, performing mura compensation on the display panel according to the compensation data corresponding to each pixel.
The step S2 specifically includes:
selecting a plurality of different gray scales as measurement gray scales;
and measuring and storing compensation data corresponding to each compensation pixel under each measured gray scale.
The step S3 specifically includes:
and calculating the compensation data corresponding to the other pixels except the compensation pixel in each compensation area under each measurement gray scale according to the compensation data corresponding to each compensation pixel under each measurement gray scale and a preset double cubic interpolation algorithm.
And calculating corresponding compensation data of each pixel in the display panel under other gray scales except for each measured gray scale according to the corresponding compensation data of each pixel in the display panel under each measured gray scale and a preset segmented interpolation algorithm.
The preset double cubic interpolation algorithm is as follows:
p0 is compensation data of a pixel to be currently calculated, Pi is compensation data of an ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, Ki is weight of the ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, and Ki is Kix × Kiy, where Kix is a distance between the ith compensation pixel and the pixel to be currently calculated in a row direction, and Kiy is a distance between the ith compensation pixel and the pixel to be currently calculated in a column direction.
The preset piecewise interpolation algorithm is as follows:
wherein X is a target gray scale, Y is compensation data of a pixel to be calculated at present under the target gray scale, and X1And X2A first measurement gray scale and a second measurement gray scale respectively adjacent to the target gray scale, Y1And Y2Respectively the compensation data of the current pixel to be calculated under the first measurement gray scale and the second measurement gray scale, and X1＜X＜X2And the target gray scale is one of the other gray scales except the measured gray scales.
The present invention also provides a mura compensation apparatus of a display panel, including: the device comprises a compression unit, a measurement unit connected with the compression unit, a storage unit connected with the measurement unit, a processing unit connected with the storage unit and a compensation unit connected with the processing unit;
the compression unit is used for dividing the display panel into a plurality of compensation areas, and each compensation area comprises a plurality of pixels arranged in an array;
the measuring unit is used for selecting one pixel in each compensation area as a compensation pixel and measuring compensation data corresponding to each compensation pixel;
the storage unit is used for storing compensation data corresponding to each compensation pixel;
the processing unit is used for calculating compensation data of other pixels except the compensation pixel in each compensation area according to the compensation data corresponding to each compensation pixel and a preset bicubic interpolation algorithm;
and the compensation unit is used for carrying out mura compensation on the display panel according to the compensation data corresponding to each pixel.
The compensation data corresponding to each compensation pixel comprises: and the compensation pixel corresponds to compensation data under each measurement gray scale, and the measurement gray scales are a plurality of different preselected gray scales.
The processing unit is further used for calculating compensation data corresponding to other pixels except the compensation pixel in each compensation area under each measurement gray scale according to the compensation data corresponding to each compensation pixel under each measurement gray scale and a preset double cubic interpolation algorithm, and calculating compensation data corresponding to each pixel in the display panel under other gray scales except each measurement gray scale according to the compensation data corresponding to each pixel in the display panel under each measurement gray scale and a preset segmented interpolation algorithm.
The preset double cubic interpolation algorithm is as follows:
p0 is compensation data of a pixel to be currently calculated, Pi is compensation data of an ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, Ki is weight of the ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, and Ki is Kix × Kiy, where Kix is a distance between the ith compensation pixel and the pixel to be currently calculated in a row direction, and Kiy is a distance between the ith compensation pixel and the pixel to be currently calculated in a column direction.
The preset piecewise interpolation algorithm is as follows:
wherein X is a target gray scale, Y is compensation data of a pixel to be calculated at present under the target gray scale, and X1And X2A first measurement gray scale and a second measurement gray scale respectively adjacent to the target gray scale, Y1And Y2Respectively the compensation data of the current pixel to be calculated under the first measurement gray scale and the second measurement gray scale, and X1＜X＜X2And the target gray scale is one of the other gray scales except the measured gray scales.
The invention has the beneficial effects that: the invention provides a mura compensation method of a display panel, which measures and stores compensation data corresponding to each compensation pixel by taking a pixel selected in each compensation area as the compensation pixel, calculates the compensation data of other pixels except the compensation pixel in each compensation area according to the compensation data corresponding to each compensation pixel and a preset double cubic interpolation algorithm, and calculates the compensation data of other pixels except the compensation pixel in each compensation area by using the double cubic interpolation algorithm. The invention also provides a mura compensation device of the display panel, which can make image transition smoother, reduce saw teeth, improve mura compensation effect and improve picture quality.
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For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a schematic diagram of the area distribution of the mura compensation method of the display panel according to the present invention;
FIG. 2 is a flowchart of a mura compensation method of a display panel according to the present invention;
FIG. 3 is a schematic view of a mura compensation apparatus of a display panel according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 2, the present invention provides a mura compensation method of a display panel, including the following steps:
step S1, please refer to fig. 1, dividing the display panel into a plurality of compensation regions 100, wherein each compensation region 100 includes a plurality of pixels 101 arranged in an array;
in step S2, one pixel 101 selected in each compensation area 100 is used as a compensation pixel, and the compensation data corresponding to each compensation pixel is measured and stored.
Specifically, in the preferred embodiment of the present invention, one pixel 101 in the upper left corner of each compensation region 100 is selected as a compensation pixel, and as shown in fig. 1, the pixel a00, the pixel a10, the pixel a20, the pixel a30, the pixel a01, the pixel a11, the pixel a21, the pixel a31, the pixel a02, the pixel a12, the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23, and the pixel a33 are compensation pixels.
In specific implementation, the step S2 further includes the following steps:
selecting a plurality of different gray scales as measurement gray scales;
and measuring and storing compensation data corresponding to each compensation pixel under each measured gray scale.
For example, in the preferred embodiment of the present invention, gray level 32, gray level 60 and gray level 192 are selected as the measurement gray levels, then a professional mura measurement camera is used to measure the compensation data corresponding to each compensation pixel under gray level 32, the compensation data corresponding to gray level 60 and the compensation data under gray level 192, and finally the compensation data of each compensation pixel under gray level 32, gray level 60 and gray level 192 are stored in a preset flash memory chip.
Step S3, calculating compensation data of other pixels in each compensation area 100 except the compensation pixel according to the compensation data corresponding to each compensation pixel and a preset bicubic interpolation algorithm.
In specific implementation, the step S3 further includes the following steps:
calculating compensation data corresponding to other pixels except the compensation pixel in each compensation area 100 under each measurement gray scale according to the compensation data corresponding to each compensation pixel under each measurement gray scale and a preset double cubic interpolation algorithm;
and calculating corresponding compensation data of each pixel 101 in the display panel under other gray scales except each measured gray scale according to the corresponding compensation data of each pixel 101 in the display panel under each measured gray scale and a preset segmented interpolation algorithm.
Specifically, the preset bicubic interpolation algorithm is as follows:
p0 is compensation data of a pixel to be currently calculated, Pi is compensation data of an ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, Ki is weight of the ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, and Ki is Kix × Kiy, where Kix is a distance between the ith compensation pixel and the pixel to be currently calculated in a row direction, and Kiy is a distance between the ith compensation pixel and the pixel to be currently calculated in a column direction.
The preset piecewise interpolation algorithm is as follows:
wherein X is a target gray scale, Y is compensation data of a pixel to be calculated at present under the target gray scale, and X1And X2A first measurement gray scale and a second measurement gray scale respectively adjacent to the target gray scale, Y1And Y2Respectively the compensation data of the current pixel to be calculated under the first measurement gray scale and the second measurement gray scale, and X1＜X＜X2And the target gray scale is one of the other gray scales except the measured gray scales.
For example, the detailed process of calculating the compensation data corresponding to the other pixels except the compensation pixel in each compensation region 100 at each measurement gray scale according to the compensation data corresponding to each compensation pixel at each measurement gray scale and the preset bicubic interpolation algorithm includes: as shown in fig. 1, a pixel B is a pixel to be currently calculated, 16 compensation pixels closest to the pixel B are a pixel a00, and a pixel a00, a rectangular coordinate system is established with the position of the pixel a00 as an origin and the row direction of the pixel arrangement as an X axis, and the column direction of the pixel arrangement is a Y axis, where the coordinate of the pixel B is (1+ u, 1+ v), the pixel a00, the pixel a 360, the pixel B3, the pixel a 360, the pixel B, (1, 1), (2, 1), (3, 1), (0, 2), (1, 2), (2, 2), (3, 2), (0, 3), (1, 3), (2, 3), (3, 3), pixel B and pixel a00, pixel a10, pixel a20, pixel a30, pixel a01, pixel a11, pixel a21, pixel a31, pixel a02, pixel a12, pixel a22, pixel a32, pixel a03, pixel a13, pixel a23, and pixel a33 are spaced in the row direction by 1+ u, 1-u, 2-u, 1+ u, 1-u, 2-u, 1+ u, 1-u, and 2-u, pixel B and pixel a00, pixel a10, pixel a20, pixel a 8672, pixel a11, 3656, 11, and 3656, respectively, The distances in the column direction of the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23 and the pixel a33 are 1+ v, 1-v, 2-v and 2-v, respectively, the weight k of the pixel a00, the pixel a10, the pixel a20, the pixel a30, the pixel a01, the pixel a11, the pixel a21, the pixel a31, the pixel a02, the pixel a12, the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23 and the pixel a33 is (1+ u) the weight k of (1+ u), the u (1+ v), (1-v) 2, the pixel a 671 + u) (1-v) 1, u) 1, 1 (1) u) 1, v, u (1) 1, v) 1, u (1) u) 1, v, u (1-v), (1-u) (1-v), (2-u) (1-v), (1+ u) (2-v), u (2-v), (1-u) (2-v) and (2-u) (2-v); the compensation data of the gray scale 32 of the pixel a00, the pixel a10, the pixel a20, the pixel a30, the pixel a01, the pixel a11, the pixel a21, the pixel a31, the pixel a02, the pixel a12, the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23 and the pixel a33 are P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, P13, P14, P15, P16 respectively at the selected measurement gray scale are gray scale 32, gray scale 60 and gray scale 192, respectively, and the compensation data P of the pixel B at the gray scale 32 is:
P＝(1+u)*(1+v)*P1+u*(1+v)*P2+(1-u)*(1+v)*P3+(2-u)*(1+v)*P4+(1+u)*v*P5+u*v*P6+(1-u)*v*P7+(2-u)*v*P8+(1+u)*(1-v)*P9+u*(1-v)*P10+(1-u)*(1-v)*P11+(2-u)*(1-v)*P12+(1+u)*(2-v)*P13+u*(2-v)*P14+(1-u)*(2-v)*P15+(2-u)*(2-v)*P16；
compensation data of the pixel a00, the pixel a10, the pixel a20, the pixel a30, the pixel a01, the pixel a11, the pixel a21, the pixel a31, the pixel a02, the pixel a12, the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23 and the pixel a33 at the gray scale 64 are P1 ', P2 ', P3 ', P4 ', P5 ', P6 ', P7 ', P8 ', P9 ', P10 ', P11 ', P12 ', P13 ', P14 ', P15 ' and P16 ', respectively, and compensation data P ' of the pixel B at the gray scale 64 is:
P’＝(1+u)*(1+v)*P1’+u*(1+v)*P2’+(1-u)*(1+v)*P3’+(2-u)*(1+v)*P4’+(1+u)*v*P5’+u*v*P6’+(1-u)*v*P7’+(2-u)*v*P8’+(1+u)*(1-v)*P9’+u*(1-v)*P10’+(1-u)*(1-v)*P11’+(2-u)*(1-v)*P12’+(1+u)*(2-v)*P13’+u*(2-v)*P14’+(1-u)*(2-v)*P15’+(2-u)*(2-v)*P16’；
compensation data of the pixel a00, the pixel a01, the pixel a02, the pixel a03, the pixel a10, the pixel a11, the pixel a12, the pixel a13, the pixel a20, the pixel a21, the pixel a22, the pixel a23, the pixel a30, the pixel a31, the pixel a32 and the pixel a33 at the gray scale 192 are P1 ", P2", P3 ", P4", P5 ", P6", P7 ", P8", P9 ", P10", P11 ", P12", P13 ", P14", P15 "and P16", respectively, and then the compensation data P "of the pixel B at the gray scale 192" is:
P”＝(1+u)*(1+v)*P1”+u*(1+v)*P2”+(1-u)*(1+v)*P3”+(2-u)*(1+v)*P4”+(1+u)*v*P5”+u*v*P6”+(1-u)*v*P7”+(2-u)*v*P8”+(1+u)*(1-v)*P9”+u*(1-v)*P10”+(1-u)*(1-v)*P11”+(2-u)*(1-v)*P12”+(1+u)*(2-v)P13”+u*(2-v)*P14”+(1-u)*(2-v)*P15”+(2-u)*(2-v)*P16”。
still regarding the pixel B as the current pixel to be calculated, selecting the gray scale 50 as the target gray scale, and calculating the corresponding compensation data of each pixel 101 in the display panel under the other gray scales except for each measured gray scale according to the corresponding compensation data of each pixel 101 in the display panel under each measured gray scale and the preset piecewise interpolation algorithm: the selected measured gray levels are 32, 64 and 192, and it can be seen that the two measured gray levels adjacent to the gray level 50 are the gray level 32 and the gray level 64, and the compensation data of the pixel B at the gray levels 32 and 64 are P and P', respectively, and the compensation data of the pixel B at the gray level 50 according to the above-mentioned predetermined piecewise interpolation algorithm is: 7P/16+ 9P'/16, the compensation data of each pixel 101 under all 0-255 can be calculated by referring to the calculation method of the gray scale 50, the calculation process of each gray scale is the same as that of the gray scale 50, and the description is omitted.
Step S4, performing mura compensation on the display panel according to the compensation data corresponding to each pixel 101.
Referring to fig. 3, the present invention further provides a mura compensation apparatus for a display panel, including: the device comprises a compression unit 10, a measurement unit 20 connected with the compression unit 10, a storage unit 30 connected with the measurement unit 20, a processing unit 40 connected with the storage unit 30 and a compensation unit 50 connected with the processing unit 40;
the compression unit 10 is configured to divide the display panel into a plurality of compensation regions 100, where each compensation region 100 includes a plurality of pixels arranged in an array;
the measurement unit 20 is configured to measure compensation data corresponding to each compensation pixel by using one pixel 101 selected in each compensation area 100 as the compensation pixel;
the storage unit 30 is used for storing compensation data corresponding to each compensation pixel;
the processing unit 40 is configured to calculate compensation data of other pixels in each compensation region 100 except for the compensation pixel according to the compensation data corresponding to each compensation pixel and a preset bicubic interpolation algorithm;
the compensation unit 50 is configured to perform mura compensation on the display panel according to the compensation data corresponding to each pixel 101.
Specifically, in the preferred embodiment of the present invention, one pixel 101 in the upper left corner of each compensation region 100 is selected as a compensation pixel, and as shown in fig. 1, the pixel a00, the pixel a10, the pixel a20, the pixel a30, the pixel a01, the pixel a11, the pixel a21, the pixel a31, the pixel a02, the pixel a12, the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23, and the pixel a33 are compensation pixels.
In specific implementation, the process of measuring the compensation data corresponding to each compensation pixel specifically includes:
selecting a plurality of different gray scales as measurement gray scales;
and measuring and storing compensation data corresponding to each compensation pixel under each measured gray scale.
For example, in the preferred embodiment of the present invention, gray level 32, gray level 60 and gray level 192 are selected as the measurement gray levels, then a professional mura measurement camera is used to measure the compensation data corresponding to each compensation pixel at gray level 32, the compensation data corresponding to gray level 60 and the compensation data corresponding to gray level 192, and finally the compensation data corresponding to each compensation pixel at gray level 32, gray level 60 and gray level 192 are stored in the predetermined storage unit 30.
That is, the compensation data corresponding to each compensation pixel includes: and the compensation pixel corresponds to compensation data under each measurement gray scale, and the measurement gray scales are a plurality of different preselected gray scales.
The process of calculating, by the processing unit 40, the compensation data of the pixels other than the compensation pixel in each compensation region 100 according to the compensation data corresponding to each compensation pixel and the preset bicubic interpolation algorithm includes:
calculating compensation data corresponding to other pixels except the compensation pixel in each compensation area 100 under each measurement gray scale according to the compensation data corresponding to each compensation pixel under each measurement gray scale and a preset double cubic interpolation algorithm;
and calculating corresponding compensation data of each pixel 101 in the display panel under other gray scales except each measured gray scale according to the corresponding compensation data of each pixel 101 in the display panel under each measured gray scale and a preset segmented interpolation algorithm.
Specifically, the preset bicubic interpolation algorithm is as follows:
p0 is compensation data of a pixel to be currently calculated, Pi is compensation data of an ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, Ki is weight of the ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, and Ki is Kix × Kiy, where Kix is a distance between the ith compensation pixel and the pixel to be currently calculated in a row direction, and Kiy is a distance between the ith compensation pixel and the pixel to be currently calculated in a column direction.
The preset piecewise interpolation algorithm is as follows:
wherein X is a target gray scale, Y is compensation data of a pixel to be calculated at present under the target gray scale, and X1And X2A first measurement gray scale and a second measurement gray scale respectively adjacent to the target gray scale, Y1And Y2Respectively the compensation data of the current pixel to be calculated under the first measurement gray scale and the second measurement gray scale, and X1＜X＜X2And the target gray scale is one of the other gray scales except the measured gray scales.
The pixel B is a pixel to be currently calculated, 16 compensation pixels closest to the pixel B are a pixel a00, a pixel a00 and a pixel a00, a rectangular coordinate system is established with the position of the pixel a00 as an origin, the row direction of the pixel arrangement as an X axis and the column direction of the pixel arrangement as a Y axis, and at this time, the coordinates of the pixel B are (1+ u, 1+ v), the pixel a00, the pixel a 360, the coordinates of the pixel a 360, the (360, the pixel a 360, the pixel B, the pixel a, (2, 1), (3, 1), (0, 2), (1, 2), (2, 2), (3, 2), (0, 3), (1, 3), (2, 3), (3, 3), pixel B and pixel a00, pixel a10, pixel a20, pixel a30, pixel a01, pixel a11, pixel a21, pixel a31, pixel a02, pixel a12, pixel a22, pixel a32, pixel a03, pixel a13, pixel a23, and pixel a33 are spaced in the row direction by 1+ u, 1-u, 2-u, 1-u, 2-u, 1+ u, 1-u, and 2-u, pixel B and pixel a00, pixel a10, pixel a20, pixel a20, the distances in the column direction of the pixel a32, the pixel a03, the pixel a13, the pixel a23 and the pixel a33 are 1+ v, 1-v, 2-v and 2-v, respectively, and the weights k of the pixel a00, the pixel a10, the pixel a20, the pixel a30, the pixel a01, the pixel a11, the pixel a21, the pixel a31, the pixel a02, the pixel a12, the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23 and the pixel a33 are (1+ u) (1+ v), u (1+ v), (1-u) 1+ v), (2-u) 1, u) 1 (1+ v) u) 1, u (1) u (1) v) u (1, v) u) 1, u (1) u (1, v) u) 1, v) u (1, v) u, u (1-v), (1-u) (1-v), (2-u) (1-v), (1+ u) (2-v), u (2-v), (1-u) (2-v) and (2-u) (2-v); the compensation data of the gray scale 32 of the pixel a00, the pixel a10, the pixel a20, the pixel a30, the pixel a01, the pixel a11, the pixel a21, the pixel a31, the pixel a02, the pixel a12, the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23 and the pixel a33 are P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, P13, P14, P15, P16 respectively at the selected measurement gray scale are gray scale 32, gray scale 60 and gray scale 192, respectively, and the compensation data P of the pixel B at the gray scale 32 is:
P＝(1+u)*(1+v)*P1+u*(1+v)*P2+(1-u)*(1+v)*P3+(2-u)*(1+v)*P4+(1+u)*v*P5+u*v*P6+(1-u)*v*P7+(2-u)*v*P8+(1+u)*(1-v)*P9+u*(1-v)*P10+(1-u)*(1-v)*P11+(2-u)*(1-v)*P12+(1+u)*(2-v)*P13+u*(2-v)*P14+(1-u)*(2-v)*P15+(2-u)*(2-v)*P16；
compensation data of the pixel a00, the pixel a10, the pixel a20, the pixel a30, the pixel a01, the pixel a11, the pixel a21, the pixel a31, the pixel a02, the pixel a12, the pixel a22, the pixel a32, the pixel a03, the pixel a13, the pixel a23 and the pixel a33 at the gray scale 64 are P1 ', P2 ', P3 ', P4 ', P5 ', P6 ', P7 ', P8 ', P9 ', P10 ', P11 ', P12 ', P13 ', P14 ', P15 ' and P16 ', respectively, and compensation data P ' of the pixel B at the gray scale 64 is:
P’＝(1+u)*(1+v)*P1’+u*(1+v)*P2’+(1-u)*(1+v)*P3’+(2-u)*(1+v)*P4’+(1+u)*v*P5’+u*v*P6’+(1-u)*v*P7’+(2-u)*v*P8’+(1+u)*(1-v)*P9’+u*(1-v)*P10’+(1-u)*(1-v)*P11’+(2-u)*(1-v)*P12’+(1+u)*(2-v)*P13’+u*(2-v)*P14’+(1-u)*(2-v)*P15’+(2-u)*(2-v)*P16’；
compensation data of the pixel a00, the pixel a01, the pixel a02, the pixel a03, the pixel a10, the pixel a11, the pixel a12, the pixel a13, the pixel a20, the pixel a21, the pixel a22, the pixel a23, the pixel a30, the pixel a31, the pixel a32 and the pixel a33 at the gray scale 192 are P1 ", P2", P3 ", P4", P5 ", P6", P7 ", P8", P9 ", P10", P11 ", P12", P13 ", P14", P15 "and P16", respectively, and then the compensation data P "of the pixel B at the gray scale 192" is:
P”＝(1+u)*(1+v)*P1”+u*(1+v)*P2”+(1-u)*(1+v)*P3”+(2-u)*(1+v)*P4”+(1+u)*v*P5”+u*v*P6”+(1-u)*v*P7”+(2-u)*v*P8”+(1+u)*(1-v)*P9”+u*(1-v)*P10”+(1-u)*(1-v)*P11”+(2-u)*(1-v)*P12”+(1+u)*(2-v)P13”+u*(2-v)*P14”+(1-u)*(2-v)*P15”+(2-u)*(2-v)*P16”。
still regarding the pixel B as the current pixel to be calculated, selecting the gray scale 50 as the target gray scale, and calculating the corresponding compensation data of each pixel 101 in the display panel under the other gray scales except for each measured gray scale according to the corresponding compensation data of each pixel 101 in the display panel under each measured gray scale and the preset piecewise interpolation algorithm: the selected measured gray levels are 32, 64 and 192, and it can be seen that the two measured gray levels adjacent to the gray level 50 are the gray level 32 and the gray level 64, and the compensation data of the pixel B at the gray levels 32 and 64 are P and P', respectively, and the compensation data of the pixel B at the gray level 50 according to the above-mentioned predetermined piecewise interpolation algorithm is: 7P/16+ 9P'/16, the compensation data of each pixel 101 under all 0-255 can be calculated by referring to the calculation method of the gray scale 50, the calculation process of each gray scale is the same as that of the gray scale 50, and the description is omitted.
In summary, the present invention provides a mura compensation method and apparatus for a display panel. According to the mura compensation method of the display panel, one pixel selected in each compensation area is used as a compensation pixel, compensation data corresponding to each compensation pixel is measured and stored, compensation data of other pixels except the compensation pixel in each compensation area is calculated according to the compensation data corresponding to each compensation pixel and a preset double cubic interpolation algorithm, and compensation data of other pixels except the compensation pixel in each compensation area is calculated by using the double cubic interpolation algorithm.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (8)
1. A mura compensation method of a display panel, comprising the steps of:
step S1, dividing the display panel into a plurality of compensation regions (100), wherein each compensation region (100) comprises a plurality of pixels (101) arranged in an array;
step S2, selecting one pixel (101) in each compensation area (100) as a compensation pixel, and measuring and storing compensation data corresponding to each compensation pixel;
step S3, calculating compensation data of other pixels except the compensation pixel in each compensation area (100) according to the compensation data corresponding to each compensation pixel and a preset double cubic interpolation algorithm;
step S4, performing mura compensation on the display panel according to the compensation data corresponding to each pixel (101);
the preset double cubic interpolation algorithm is as follows:
p0 is compensation data of a pixel to be currently calculated, Pi is compensation data of an ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, Ki is weight of the ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, and Ki is Kix × Kiy, where Kix is a distance between the ith compensation pixel and the pixel to be currently calculated in a row direction, and Kiy is a distance between the ith compensation pixel and the pixel to be currently calculated in a column direction.
2. The mura compensation method of a display panel as claimed in claim 1, wherein the step S2 specifically includes:
selecting a plurality of different gray scales as measurement gray scales;
and measuring and storing compensation data corresponding to each compensation pixel under each measured gray scale.
3. The mura compensation method of the display panel as claimed in claim 2, wherein the step S3 specifically includes:
calculating compensation data corresponding to other pixels except the compensation pixel in each compensation area (100) under each measurement gray scale according to the compensation data corresponding to each compensation pixel under each measurement gray scale and a preset double cubic interpolation algorithm;
and calculating corresponding compensation data of each pixel (101) in the display panel under other gray scales except each measured gray scale according to the corresponding compensation data of each pixel (101) in the display panel under each measured gray scale and a preset segmented interpolation algorithm.
4. The mura compensation method of a display panel according to claim 3, wherein the preset piecewise interpolation algorithm is:
wherein X is a target gray scale, Y is compensation data of a pixel to be calculated at present under the target gray scale, and X1And X2A first measurement gray scale and a second measurement gray scale respectively adjacent to the target gray scale, Y1And Y2Respectively the compensation data of the current pixel to be calculated under the first measurement gray scale and the second measurement gray scale, and X1＜X＜X2And the target gray scale is one of the other gray scales except the measured gray scales.
5. A mura compensation apparatus of a display panel, comprising: the device comprises a compression unit (10), a measurement unit (20) connected with the compression unit (10), a storage unit (30) connected with the measurement unit (20), a processing unit (40) connected with the storage unit (30) and a compensation unit (50) connected with the processing unit (40);
the compression unit (10) is used for dividing the display panel into a plurality of compensation regions (100), and each compensation region (100) comprises a plurality of pixels arranged in an array;
the measuring unit (20) is used for selecting one pixel (101) in each compensation area (100) as a compensation pixel and measuring compensation data corresponding to each compensation pixel;
the storage unit (30) is used for storing compensation data corresponding to each compensation pixel;
the processing unit (40) is used for calculating compensation data of other pixels except the compensation pixels in each compensation area (100) according to the compensation data corresponding to each compensation pixel and a preset bicubic interpolation algorithm;
the compensation unit (50) is used for carrying out mura compensation on the display panel according to compensation data corresponding to each pixel (101);
the preset double cubic interpolation algorithm is as follows:
p0 is compensation data of a pixel to be currently calculated, Pi is compensation data of an ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, Ki is weight of the ith compensation pixel among 16 compensation pixels closest to the pixel to be currently calculated, and Ki is Kix × Kiy, where Kix is a distance between the ith compensation pixel and the pixel to be currently calculated in a row direction, and Kiy is a distance between the ith compensation pixel and the pixel to be currently calculated in a column direction.
6. The mura compensation apparatus of claim 5 wherein the compensation data for each compensation pixel comprises: and the compensation pixel corresponds to compensation data under each measurement gray scale, and the measurement gray scales are a plurality of different preselected gray scales.
7. The mura compensation apparatus for a display panel according to claim 6, wherein the processing unit (30) is further configured to calculate compensation data corresponding to pixels other than the compensation pixel in each compensation region (100) at each measured gray scale according to the compensation data corresponding to the compensation pixel at each measured gray scale and a predetermined bi-cubic interpolation algorithm, and calculate compensation data corresponding to pixels (101) in the display panel at other gray scales other than each measured gray scale according to the compensation data corresponding to pixels (101) in the display panel at each measured gray scale and a predetermined piecewise interpolation algorithm.
8. The mura compensation apparatus of claim 7 wherein the predetermined piecewise interpolation algorithm is:
wherein X is a target gray scale, Y is compensation data of a pixel to be calculated at present under the target gray scale, and X1And X2A first measurement gray scale and a second measurement gray scale respectively adjacent to the target gray scale, Y1And Y2Respectively the compensation data of the current pixel to be calculated under the first measurement gray scale and the second measurement gray scale, and X1＜X＜X2And the target gray scale is one of the other gray scales except the measured gray scales.
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109887456A (en) * | 2019-01-17 | 2019-06-14 | 硅谷数模半导体（北京）有限公司 | Data compression method and apparatus |
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| US11341891B2 (en) | 2020-09-10 | 2022-05-24 | Tcl China Star Optoelectronics Technology Co., Ltd. | Display panel adjustment method dividing fan-out mura region |
| CN112017611B (en) * | 2020-09-10 | 2021-06-01 | Tcl华星光电技术有限公司 | Debugging method and device for display panel |
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| CN113963672B (en) * | 2021-11-05 | 2023-02-24 | 惠州华星光电显示有限公司 | Display brightness adjusting method and device, electronic equipment and storage medium |
| CN114677988B (en) * | 2022-04-27 | 2023-05-30 | 广州华星光电半导体显示技术有限公司 | Brightness compensation method and device for display panel |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263924A (en) * | 2010-05-29 | 2011-11-30 | 比亚迪股份有限公司 | Image processing method based on bicubic interpolation and image display method |
| CN102855856A (en) * | 2012-08-30 | 2013-01-02 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display and driving method for eliminating Mura thereof |
| CN105070273A (en) * | 2015-09-02 | 2015-11-18 | 深圳市华星光电技术有限公司 | Mura area brightness compensation method and Mura pixel point brightness design method |
| CN105244001A (en) * | 2015-11-09 | 2016-01-13 | 深圳市华星光电技术有限公司 | Method and terminal for determining mura compensation value |
| CN105280149A (en) * | 2015-11-11 | 2016-01-27 | 深圳市华星光电技术有限公司 | Mura compensation data writing apparatus and method |
| CN105632443A (en) * | 2016-03-09 | 2016-06-01 | 深圳市华星光电技术有限公司 | Mura phenomenon compensation method |
| CN106910483A (en) * | 2017-05-03 | 2017-06-30 | 深圳市华星光电技术有限公司 | A kind of mura phenomenons compensation method of display panel and display panel |
| CN107180605A (en) * | 2016-03-11 | 2017-09-19 | 青岛海信电器股份有限公司 | A kind of method for eliminating display device Mura, elimination display device Mura devices and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8180180B2 (en) * | 2008-12-29 | 2012-05-15 | Arcsoft Hangzhou Co., Ltd. | Method for magnifying images and videos |
-
2018
- 2018-04-04 CN CN201810299252.7A patent/CN108538264B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263924A (en) * | 2010-05-29 | 2011-11-30 | 比亚迪股份有限公司 | Image processing method based on bicubic interpolation and image display method |
| CN102855856A (en) * | 2012-08-30 | 2013-01-02 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display and driving method for eliminating Mura thereof |
| CN105070273A (en) * | 2015-09-02 | 2015-11-18 | 深圳市华星光电技术有限公司 | Mura area brightness compensation method and Mura pixel point brightness design method |
| CN105244001A (en) * | 2015-11-09 | 2016-01-13 | 深圳市华星光电技术有限公司 | Method and terminal for determining mura compensation value |
| CN105280149A (en) * | 2015-11-11 | 2016-01-27 | 深圳市华星光电技术有限公司 | Mura compensation data writing apparatus and method |
| CN105632443A (en) * | 2016-03-09 | 2016-06-01 | 深圳市华星光电技术有限公司 | Mura phenomenon compensation method |
| CN107180605A (en) * | 2016-03-11 | 2017-09-19 | 青岛海信电器股份有限公司 | A kind of method for eliminating display device Mura, elimination display device Mura devices and display device |
| CN106910483A (en) * | 2017-05-03 | 2017-06-30 | 深圳市华星光电技术有限公司 | A kind of mura phenomenons compensation method of display panel and display panel |
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