Display device and method of driving the same

Patent metadata

Field	Value
Publication number	US-10789870-B2
Application number	US-201816189665-A
Country	US
Kind code	B2
Filing date	Nov 13, 2018
Priority date	Dec 27, 2017
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A display device including a display panel includes a plurality of pixels corresponding to a plurality of regions, an image compensator configured to obtain compensation data for the pixels by performing respective sampling compensation operations for the regions, and to generate compensated image data by compensating input image data based on the compensation data, the compensation data being generated by performing at least two of the sampling compensation operations based on respective sampling matrices having different sizes, and a display panel driver configured to drive the display panel to display an image corresponding to the compensated image data on the display panel.

First claim

What is claimed is:

1. A display device comprising:
a display panel comprising a plurality of pixels corresponding to a plurality of regions;
an image compensator configured to obtain compensation data for the pixels by performing respective sampling compensation operations for the regions, and to generate compensated image data by compensating input image data based on the compensation data, the compensation data being generated by performing first and second sampling compensation operations of the sampling compensation operations for first and second regions of the plurality of regions based on respective first and second sampling matrices having different sizes; and
a display panel driver configured to drive the display panel to display an image corresponding to the compensated image data on the display panel.

2. The display device of claim 1 , wherein the regions comprise a first region, a second region, a third region, and a fourth region,
wherein the fourth region corresponds to at least a portion of a region at which a first stain corresponding in location to a first line extending in a first direction intersects with a second stain corresponding in location to a second line extending a second direction that is different from the first direction,
wherein the third region corresponds to at least a portion of a region corresponding to the second line,
wherein the second region corresponds to at least a portion of a region corresponding to the first line, and
wherein the first region corresponds to at least a portion of a region other than the second region, the third region, and the fourth region.

3. The display device of claim 2 , wherein the sampling compensation operations comprise a first sampling compensation operation, a second sampling compensation operation, a third sampling compensation operation, and a fourth sampling compensation operation,
wherein the first sampling compensation operation generates the compensation data for the first region based on a first sampling matrix having a size of R1 pixel-rows and C1 pixel-columns, where R1 and C1 are integers greater than 1,
wherein the second sampling compensation operation generates the compensation data for the second region based on a second sampling matrix having a size of R2 pixel-rows and C2 pixel-columns, where R2 is an integer greater than or equal to R1, and C2 is an integer greater than or equal to 1 and smaller than C1,
wherein the third sampling compensation operation generates the compensation data for the third region based on a third sampling matrix having a size of R3 pixel-rows and C3 pixel-columns, where R3 is an integer greater than or equal to 1 and smaller than R1, and C3 is an integer greater than or equal to C1, and
wherein the fourth sampling compensation operation generates the compensation data for the fourth region based on a fourth sampling matrix having a size of R4 pixel-rows and C4 pixel-columns, where R4 is an integer greater than or equal to 1 and smaller than R1, and C4 is an integer greater than or equal to 1 and smaller than C1.

4. The display device of claim 3 , wherein the image compensator is configured to perform the first sampling compensation operation, the second sampling compensation operation, the third sampling compensation operation, and the fourth sampling compensation operation sequentially.

5. The display device of claim 3 , wherein a quantity of the R2 pixel-rows is an integer multiple of a quantity of the R1 pixel-rows, and
wherein a quantity of the C3 pixel-columns is an integer multiple of a quantity of the C1 pixel-columns.

6. The display device of claim 3 , wherein the fourth sampling matrix has a size of one pixel-row and one pixel-column.

7. The display device of claim 1 , wherein the display panel driver comprises:
a compensation data storage configured to store different look-up tables for performing the sampling compensation operations; and
a data compensator configured to perform the sampling compensation operations based on the look-up tables.

8. The display device of claim 7 , wherein the data compensator is configured to perform the sampling compensation operations in an order of larger sizes of the sampling matrices.

9. The display device of claim 7 , wherein the display panel driver further comprises:
a compensation data generator configured to generate the look-up tables based on a photographed image of the display panel.

10. The display device of claim 9 , wherein the compensation data generator comprises:
a luminance profile obtainer configured to obtain a luminance profile of at least a portion of the pixels from the photographed image;
a luminance target value obtainer configured to obtain a luminance target value corresponding to a reference gray-scale value;
a luminance compensation value generator configured to generate a luminance compensation value based on the luminance profile and the luminance target value; and
a compensation data generator configured to generate the compensation data based on the luminance compensation value.

11. The display device of claim 1 , wherein the display panel comprises a first substrate on which a polarizing layer is formed, and
wherein the regions are divided based on a boundary of the polarizing layer.

12. The display device of claim 11 , wherein the boundary of the polarizing layer has a line shape.

13. The display device of claim 11 , wherein the display panel further comprises a second substrate that is opposite to the first substrate, and
wherein the polarizing layer is between the first substrate and the second substrate.

14. The display device of claim 13 , wherein the polarizing layer is a wire grid polarizing layer.

15. A method of driving a display device that comprises a plurality of pixels corresponding to a plurality of regions, the method comprising:
generating compensated image data by compensating input image data based on compensation data for the pixels; and
displaying an image corresponding to the compensated image data,
wherein the compensation data is obtained by performing respective sampling compensation operations for the regions, and
wherein the compensation data is generated by performing first and second sampling compensation operations of the sampling compensation operations for first and second regions of the plurality of regions based on respective first and second sampling matrices having different sizes.

16. The method of claim 15 , wherein the regions comprise a first region, a second region, a third region, and a fourth region,
wherein the fourth region corresponds to at least a portion of a region at which a first stain corresponding in location to a first line extending in a first direction intersects with a second stain corresponding in location to a second line extending a second direction that is different from the first direction,
wherein the third region corresponds to at least a portion of a region corresponding to the second line,
wherein the second region corresponds to at least a portion of a region corresponding to the first line, and
wherein the first region corresponds to at least a portion of a region other than the second region, the third region, and the fourth region.

17. The method of claim 16 , wherein the sampling compensation operations comprise a first sampling compensation operation, a second sampling compensation operation, a third sampling compensation operation, and a fourth sampling compensation operation,
wherein the first sampling compensation operation generates the compensation data for the first region

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Heejoon
• Moon Hoi-Sik
• Kim Mingyu
• Lee Jeongwoon

Classifications

• G09G2320/0693

  Calibration of display systems · CPC title

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G3/3611

  Control of matrices with row and column drivers · CPC title

• G09G2310/0221

  with use of split matrices (G09G3/3644 and G09G3/3666 take precedence) · CPC title

• G09G2320/0285

  using tables for spatial correction of display data · CPC title