Brightness compensation method of mura area and design method of mura pixel dot brightness

Abstract

The present invention provides a brightness compensation method of a Mura area and a design method of a Mura pixel dot brightness. By searching the right and lower normal pixel dots which are closest to the designated Mura pixel dot, and respectively recording the brightnesses of the right and lower normal pixel dots, and the distances between the right and lower normal pixel dots and the designated pixel dot, with combination of the brightnesses of the left and upper normal pixel dots adjacent to the designated Mura pixel dot, the weighted operation is executed to the brightnesses of the normal pixel dots at the right side, the lower side, the left side and the upper side to obtain the ideal brightness of the designated Mura pixel dot, and replace the original brightness of the designated Mura pixel dot with the obtained ideal brightness. Then, the brightness compensation of the Mura area is accomplished. The brightness of the Mura area after compensation is smoothly transited.

Claims

1. A brightness compensation method of a Mura area, comprising steps of: step 1, providing a display panel, and the display panel comprises a plurality of pixel dots aligned in array, and the display panel comprises a Mura area and a normal area; step 2, obtaining a brightness matrix of the display panel, and marking the Mura area, and searching and designating a first Mura pixel dot in the Mura area; step 3, searching a right normal pixel dot and a lower normal pixel dot positioned at a right side and a lower side of the designated pixel dot, of which Euclidean distances with the Mura pixel dot are shortest, and respectively recording brightnesses of the right and lower normal pixel dots, and distances between the right and lower normal pixel dots and the designated pixel dot; step 4, searching a left normal pixel dot and an upper normal pixel dot positioned at a left side and an upper side of the designated pixel dot, and respectively recording brightnesses of the left and upper normal pixel dots; step 5, executing weighted operation to the brightnesses of the normal pixel dots at the right side, the lower side, the left side and the upper side according to the brightnesses of the right and lower normal pixel dots, and the distances between the right and lower normal pixel dots and the designated pixel dot, and the brightnesses of the left and upper normal pixel dots, and the distance is the weight, to obtain an ideal brightness of the designated Mura pixel dot, and replace an original brightness of the designated Mura pixel dot with the obtained ideal brightness; step 6, searching and designating a next Mura pixel dot in the Mura area, and repeating the step 3 to the step 5 until all Mura pixel dots in the Mura area are processed to accomplish brightness compensation to the Mura area of the display panel.

2. The brightness compensation method of the Mura area according to claim 1, wherein searching and designating the Mura pixel dots in the Mura area is proceeded by following the orders from left to right, from top to bottom.

3. The brightness compensation method of the Mura area according to claim 1, wherein a weighted operation formula in the step 5 is: $\mathrm{Li}=\frac{F1\frac{L1}{D1}+F2\frac{L2}{D2}+F3L3+F4L4}{\frac{F1}{D1}+\frac{F2}{D2}+F3+F4}$ wherein Li is the ideal brightness of the designated Mura pixel dot, and L1 is the brightness of the right normal pixel dot, and L2 is the brightness of the lower normal pixel dot, and L3 is the brightness of the left normal pixel dot, and L4 is the brightness of the upper normal pixel dot, and D1 is the distance between the right normal pixel dot and the designated Mura pixel dot, and D2 is the distance between the lower normal pixel dot and the designated Mura pixel dot; F1 is an existing coefficient of the right normal pixel dot, and in case that the right normal pixel dot exists, F1=1, and in case that the right normal pixel dot does not exist, F1=0; F2 is an existing coefficient of the lower normal pixel dot, and in case that the lower normal pixel dot exists, F2=1, and in case that the lower normal pixel dot does not exist, F2=0; F3 is an existing coefficient of the left normal pixel dot, and in case that the left normal pixel dot exists, F3=1, and in case that the left normal pixel dot does not exist, F3=0; F4 is an existing coefficient of the upper normal pixel dot, and in case that the upper normal pixel dot exists, F4=1, and in case that the upper normal pixel dot does not exist, F4=0.

4. The brightness compensation method of the Mura area according to claim 3, wherein in case that one designated Mura pixel dot in the Mura area is a pixel dot of first row, first column, a brightness of the normal pixel dot, of which the Euclidean distance with the pixel dot of first row, first column is shortest, is employed to be the ideal brightness, and the ideal brightness is employed to replace an original brightness of the pixel dot of first row, first column.

5. The brightness compensation method of the Mura area according to claim 1, wherein the Mura area is at an arbitrary position in the display panel.

6. A design method of a Mura pixel dot brightness, comprising steps of: step 1, providing a display panel having Mura pixel dots and normal pixel dots, and searching and designating one Mura pixel dot in the display panel; step 2, searching a right normal pixel dot and a lower normal pixel dot positioned at a right side and a lower side of the designated pixel dot, of which Euclidean distances with the Mura pixel dot are shortest, and respectively recording brightnesses of the right and lower normal pixel dots, and distances between the right and lower normal pixel dots and the designated pixel dot; step 3, searching a left normal pixel dot and an upper normal pixel dot positioned at a left side and an upper side of the designated pixel dot, and respectively recording brightnesses of the left and upper normal pixel dots; step 4, executing weighted operation to the brightnesses of the normal pixel dots at the right side, the lower side, the left side and the upper side according to the brightnesses of the right and lower normal pixel dots, and the distances between the right and lower normal pixel dots and the designated pixel dot, and the brightnesses of the left and upper normal pixel dots, and the distance is the weight, to obtain an ideal brightness of the designated pixel dot.

7. The design method of the Mura pixel dot brightness according to claim 6, wherein a weighted operation formula in the step 4 is: $\mathrm{Li}=\frac{F1\frac{L1}{D1}+F2\frac{L2}{D2}+F3L3+F4L4}{\frac{F1}{D1}+\frac{F2}{D2}+F3+F4},$ wherein Li is the ideal brightness of the designated Mura pixel dot, and L1 is the brightness of the right normal pixel dot, and L2 is the brightness of the lower normal pixel dot, and L3 is the brightness of the left normal pixel dot, and L4 is the brightness of the upper normal pixel dot, and D1 is the distance between the right normal pixel dot and the designated Mura pixel dot, and D2 is the distance between the lower normal pixel dot and the designated Mura pixel dot; F1 is an existing coefficient of the right normal pixel dot, and in case that the right normal pixel dot exists, F1=1, and in case that the right normal pixel dot does not exist, F1=0; F2 is an existing coefficient of the lower normal pixel dot, and in case that the lower normal pixel dot exists, F2=1, and in case that the lower normal pixel dot does not exist, F2=0; F3 is an existing coefficient of the left normal pixel dot, and in case that the left normal pixel dot exists, F3=1, and in case that the left normal pixel dot does not exist, F3=0; F4 is an existing coefficient of the upper normal pixel dot, and in case that the upper normal pixel dot exists, F4=1, and in case that the upper normal pixel dot does not exist, F4=0.

8. The design method of the Mura pixel dot brightness according to claim 7, wherein in case that the designated Mura pixel dot is a pixel dot of first row, first column, a brightness of the normal pixel dot, of which the Euclidean distance with the pixel dot of first row, first column is shortest, is employed to be the ideal brightness.

9. The design method of the Mura pixel dot brightness according to claim 6, wherein in the step 1, the Mura pixel dot is searched and designated with the brightness matrix of the display panel.

10. A brightness compensation method of a Mura area, comprising steps of: step 1, providing a display panel, and the display panel comprises a plurality of pixel dots aligned in array, and the display panel comprises a Mura area and a normal area; step 2, obtaining a brightness matrix of the display panel, and marking the Mura area, and searching and designating a first Mura pixel dot in the Mura area; step 3, searching a right normal pixel dot and a lower normal pixel dot positioned at a right side and a lower side of the designated pixel dot, of which Euclidean distances with the Mura pixel dot are shortest, and respectively recording brightnesses of the right and lower normal pixel dots, and distances between the right and lower normal pixel dots and the designated pixel dot; step 4, searching a left normal pixel dot and an upper normal pixel dot positioned at a left side and an upper side of the designated pixel dot, and respectively recording brightnesses of the left and upper normal pixel dots; step 5, executing weighted operation to the brightnesses of the normal pixel dots at the right side, the lower side, the left side and the upper side according to the brightnesses of the right and lower normal pixel dots, and the distances between the right and lower normal pixel dots and the designated pixel dot, and the brightnesses of the left and upper normal pixel dots, and the distance is the weight, to obtain an ideal brightness of the designated Mura pixel dot, and replace an original brightness of the designated Mura pixel dot with the obtained ideal brightness; step 6, searching and designating a next Mura pixel dot in the Mura area, and repeating the step 3 to the step 5 until all Mura pixel dots in the Mura area are processed to accomplish brightness compensation to the Mura area of the display panel; wherein searching and designating the Mura pixel dots in the Mura area is proceeded by following the orders from left to right, from top to bottom; wherein a weighted operation formula in the step 5 is: $\mathrm{Li}=\frac{F1\frac{L1}{D1}+F2\frac{L2}{D2}+F3L3+F4L4}{\frac{F1}{D1}+\frac{F2}{D2}+F3+F4}$ wherein Li is the ideal brightness of the designated Mura pixel dot, and L1 is the brightness of the right normal pixel dot, and L2 is the brightness of the lower normal pixel dot, and L3 is the brightness of the left normal pixel dot, and L4 is the brightness of the upper normal pixel dot, and D1 is the distance between the right normal pixel dot and the designated Mura pixel dot, and D2 is the distance between the lower normal pixel dot and the designated Mura pixel dot; F1 is an existing coefficient of the right normal pixel dot, and in case that the right normal pixel dot exists, F1=1, and in case that the right normal pixel dot does not exist, F1=0; F2 is an existing coefficient of the lower normal pixel dot, and in case that the lower normal pixel dot exists, F2=1, and in case that the lower normal pixel dot does not exist, F2=0; F3 is an existing coefficient of the left normal pixel dot, and in case that the left normal pixel dot exists, F3=1, and in case that the left normal pixel dot does not exist, F3=0; F4 is an existing coefficient of the upper normal pixel dot, and in case that the upper normal pixel dot exists, F4=1, and in case that the upper normal pixel dot does not exist, F4=0; wherein in case that one designated Mura pixel dot in the Mura area is a pixel dot of first row, first column, a brightness of the normal pixel dot, of which the Euclidean distance with the pixel dot of first row, first column is shortest, is employed to be the ideal brightness, and the ideal brightness is employed to replace an original brightness of the pixel dot of first row, first column; and wherein the Mura area is at an arbitrary position in the display panel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The technical solution and the beneficial effects of the present invention are best understood from the following detailed description with reference to the accompanying figures and embodiments.

(2) In drawings,

(3) FIG. 1 is a brightness conversion curve of the pixels of respective columns of the display panel after calculating and compensating the brightness of the Mura area with Gamma value according to prior art;

(4) FIG. 2 is a flowchart of a brightness compensation method of a Mura area according to the present invention;

(5) FIG. 3 is a flowchart of a design method of a Mura pixel dot brightness according to the present invention;

(6) FIG. 4 is a diagram of the step 3 and the step 4 in the brightness compensation method of the Mura area according to the present invention and the step 2 and the step 3 in the design method of the Mura pixel dot brightness according to the present invention;

(7) FIG. 5 is an original display effect diagram of a display panel;

(8) FIG. 6 is a display effect diagram of a display panel after being compensated by the brightness compensation method of the Mura area according to the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(9) For better explaining the technical solution and the effect of the present invention, the present invention will be further described in detail with the accompanying drawings and the specific embodiments.

(10) Please refer to FIG. 2. The present invention first provides a brightness compensation method of a Mura area, comprising steps of:

(11) step 1, providing a display panel, and the display panel comprises a plurality of pixel dots aligned in array, and the display panel comprises a Mura area and a normal area;

(12) The Mura area can be at an arbitrary position in the display panel. The amount of the Mura areas can be one or more, which is determined according to the Mura detection result of the display panel.

(13) step 2, obtaining a brightness matrix of the display panel, and marking the Mura area, and searching and designating a first Mura pixel dot in the Mura area.

(14) Specifically, in the marked Mura area, searching and designating a first Mura pixel dots in the Mura area is proceeded by following the orders of from left to right, from top to bottom.

(15) step 3, referring to FIG. 4, searching a right normal pixel dot and a lower normal pixel dot positioned at a right side and a lower side of the designated pixel dot, of which Euclidean distances with the Mura pixel dot are shortest, and respectively recording brightnesses of the right and lower normal pixel dots, and distances between the right and lower normal pixel dots and the designated pixel dot.

(16) step 4, referring to FIG. 4, searching a left normal pixel dot and an upper normal pixel dot positioned at a left side and an upper side of the designated pixel dot, and respectively recording brightnesses of the left and upper normal pixel dots.

(17) step 5, executing weighted operation to the brightnesses of the normal pixel dots at the right side, the lower side, the left side and the upper side according to the brightnesses of the right and lower normal pixel dots, and the distances between the right and lower normal pixel dots and the designated pixel dot, and the brightnesses of the left and upper normal pixel dots, and the distance is the weight, to obtain an ideal brightness of the designated Mura pixel dot, and replace an original brightness of the designated Mura pixel dot with the obtained ideal brightness.

(18) Specifically, a weighted operation formula in the step 5 is:

(19) $\mathrm{Li}=\frac{F1\frac{L1}{D1}+F2\frac{L2}{D2}+F3L3+F4L4}{\frac{F1}{D1}+\frac{F2}{D2}+F3+F4}$

(20) wherein Li is the ideal brightness of the designated Mura pixel dot, and L1 is the brightness of the right normal pixel dot, and L2 is the brightness of the lower normal pixel dot, and L3 is the brightness of the left normal pixel dot, and L4 is the brightness of the upper normal pixel dot, and D1 is the distance between the right normal pixel dot and the designated Mura pixel dot, and D2 is the distance between the lower normal pixel dot and the designated Mura pixel dot; F1 is an existing coefficient of the right normal pixel dot, and in case that the right normal pixel dot exists, F1=1, and in case that the right normal pixel dot does not exist, F1=0; F2 is an existing coefficient of the lower normal pixel dot, and in case that the lower normal pixel dot exists, F2=1, and in case that the lower normal pixel dot does not exist, F2=0; F3 is an existing coefficient of the left normal pixel dot, and in case that the left normal pixel dot exists, F3=1, and in case that the left normal pixel dot does not exist, F3=0; F4 is an existing coefficient of the upper normal pixel dot, and in case that the upper normal pixel dot exists, F4=1, and in case that the upper normal pixel dot does not exist, F4=0.

(21) Particularly, when the Mura pixel dot is the pixel dot of first column, there will be no left normal pixel dot existing, i.e. F3=0; when the Mura pixel dot is the pixel dot of first row, there will be no upper normal pixel dot existing, i.e. F4=0. In case that one designated Mura pixel dot in the Mura area is a pixel dot of first row, first column, a brightness of the normal pixel dot, of which the Euclidean distance with the pixel dot of first row, first column is shortest, is employed to be the ideal brightness.

(22) step 6, searching and designating a next Mura pixel dot in the Mura area by following the orders of from left to right, from top to bottom, and repeating the step 3 to the step 5 until all Mura pixel dots in the Mura area are processed to accomplish brightness compensation to the Mura area of the display panel.

(23) FIG. 4 is illustrated, the first Mura pixel dot in the Mura area is the pixel dot of second row, second column, and the right normal pixel dot is the pixel dot of second row, fourth column, the lower normal pixel dot is the pixel dot of fourth row, second column, and the left normal pixel dot is the pixel dot of second row, first column, and the upper normal pixel dot is the pixel dot of first row, second column. After the normal pixel dots of four directions have been searched, the ideal brightness of the Mura pixel dot at second row, second column is calculated, and the calculated ideal brightness is employed to replace the original brightness. Then, the Mura pixel dot at second row, third column, the Mura pixel dot at third row, second column, the Mura pixel dot at third row, third column in the Mura area are continuously to be processed in orders until the processes to all the Mura pixel dots are finished to accomplish the brightness compensation to the Mura area shown in FIG. 4.

(24) Please compare FIG. 5 and FIG. 6. FIG. 5 shows an original display effect of a display panel which is not compensated. The brightness of the Mura area is not uniform. FIG. 6 shows that the brightness of the Mura area after being compensated by the brightness compensation method of the Mura area according to the present invention is smoothly transited, which is capable of promoting the production yield of the display panel and improving the display quality of the display panel.

(25) Please refer to FIG. 3. On the basis of the same inventive idea, the present invention further provides a design method of a Mura pixel dot brightness, comprising steps of:

(26) step 1, providing a display panel having Mura pixel dots and normal pixel dots, and searching and designating one Mura pixel dot in the display panel;

(27) Specifically, the Mura pixel dot can be at an arbitrary position in the display panel and can be searched and designated with the brightness matrix of the display panel.

(28) step 2, referring to FIG. 4, searching a right normal pixel dot and a lower normal pixel dot positioned at a right side and a lower side of the designated pixel dot, of which Euclidean distances with the Mura pixel dot are shortest, and respectively recording brightnesses of the right and lower normal pixel dots, and distances between the right and lower normal pixel dots and the designated pixel dot.

(29) step 3, referring to FIG. 4, searching a left normal pixel dot and an upper normal pixel dot positioned at a left side and an upper side of the designated pixel dot, and respectively recording brightnesses of the left and upper normal pixel dots.

(30) step 4, executing weighted operation to the brightnesses of the normal pixel dots at the right side, the lower side, the left side and the upper side according to the brightnesses of the right and lower normal pixel dots, and the distances between the right and lower normal pixel dots and the designated pixel dot, and the brightnesses of the left and upper normal pixel dots, and the distance is the weight, to obtain an ideal brightness of the designated pixel dot.

(31) Specifically, a weighted operation formula in the step 4 is:

(32) $\mathrm{Li}=\frac{F1\frac{L1}{D1}+F2\frac{L2}{D2}+F3L3+F4L4}{\frac{F1}{D1}+\frac{F2}{D2}+F3+F4}$

(33) wherein Li is the ideal brightness of the designated Mura pixel dot, and L1 is the brightness of the right normal pixel dot, and L2 is the brightness of the lower normal pixel dot, and L3 is the brightness of the left normal pixel dot, and L4 is the brightness of the upper normal pixel dot, and D1 is the distance between the right normal pixel dot and the designated Mura pixel dot, and D2 is the distance between the lower normal pixel dot and the designated Mura pixel dot; F1 is an existing coefficient of the right normal pixel dot, and in case that the right normal pixel dot exists, F1=1, and in case that the right normal pixel dot does not exist, F1=0; F2 is an existing coefficient of the lower normal pixel dot, and in case that the lower normal pixel dot exists, F2=1, and in case that the lower normal pixel dot does not exist, F2=0; F3 is an existing coefficient of the left normal pixel dot, and in case that the left normal pixel dot exists, F3=1, and in case that the left normal pixel dot does not exist, F3=0; F4 is an existing coefficient of the upper normal pixel dot, and in case that the upper normal pixel dot exists, F4=1, and in case that the upper normal pixel dot does not exist, F4=0.

(34) Particularly, when the designated Mura pixel dot is the pixel dot of first column, there will be no left normal pixel dot existing, i.e. F3=0; when the Mura pixel dot is the pixel dot of first row, there will be no upper normal pixel dot existing, i.e. F4=0. In case that the designated Mura pixel dot is a pixel dot of first row, first column, a brightness of the normal pixel dot, of which the Euclidean distance with the pixel dot of first row, first column is shortest, is employed to be the ideal brightness.

(35) After the ideal brightness of the Mura pixel dot is calculated, the calculated ideal brightness can be employed to replace the original brightness of the Mura pixel dot to achieve the objective of brightness compensation.

(36) In conclusion, in the brightness compensation method of the Mura area and the design method of the Mura pixel dot brightness according to the present invention, by searching the right and lower normal pixel dots which are closest to the designated Mura pixel dot, and respectively recording the brightnesses of the right and lower normal pixel dots, and the distances between the right and lower normal pixel dots and the designated pixel dot, with combination of the brightnesses of the left and upper normal pixel dots adjacent to the designated Mura pixel dot, the weighted operation is executed to the brightnesses of the normal pixel dots at the right side, the lower side, the left side and the upper side to obtain the ideal brightness of the designated Mura pixel dot, and replace the original brightness of the designated Mura pixel dot with the obtained ideal brightness. Then, the brightness compensation of the Mura area is accomplished. The brightness of the Mura area after compensation is smoothly transited, which is capable of promoting the production yield of the display panel and improving the display quality of the display panel.

(37) Above are only specific embodiments of the present invention, the scope of the present invention is not limited to this, and to any persons who are skilled in the art, change or replacement which is easily derived should be covered by the protected scope of the invention. Thus, the protected scope of the invention should go by the subject claims.