Display device, a method of generating compensation data for a display device, and a method of operating a display device

Patent metadata

Field	Value
Publication number	US-11257462-B2
Application number	US-202016928463-A
Country	US
Kind code	B2
Filing date	Jul 14, 2020
Priority date	Oct 28, 2019
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

In a method of generating compensation data for a display device, first color, second color, and third color compensation value sets may be obtained by capturing first color, second color, and third color images displayed by the display device, respectively, white, first color, second color, and third color loading luminances may be obtained by capturing white, first color, second color, and third color loading patterns displayed by the display device, respectively, first color, second color, and third color scale factors may be calculated by dividing a luminance decrease ratio of the white loading luminance by luminance decrease ratios of the first color, second color, and third color loading luminances, respectively, and the first color, second color, and third color compensation value sets and the first color, second color, and third color scale factors may be stored in the display device.

First claim

What is claimed is:

1. A method of generating compensation data for a display device, the method comprising:
obtaining first color, second color, and third color compensation value sets by capturing first color, second color, and third color images displayed by the display device, respectively;
obtaining white, first color, second color, and third color loading luminances by capturing white, first color, second color, and third color loading patterns displayed by the display device, respectively;
calculating first color, second color, and third color scale factors by dividing a luminance decrease ratio of the white loading luminance by luminance decrease ratios of the first color, second color, and third color loading luminances, respectively, the luminance decrease ratio of the white loading luminance being based on a difference between the white loading luminance and a black loading luminance; and
storing the first color, second color, and third color compensation value sets and the first color, second color, and third color scale factors in the display device,
wherein the first color, second color, and third color scale factors are selectively utilized in compensating input image data of the display device according to whether the input image data represents a single color image or a mixed color image.

2. The method of claim 1 , wherein the obtaining of the white, first color, second color, and third color loading luminances comprise:
obtaining the white loading luminance by capturing a white image as the white loading pattern;
obtaining the first color loading luminance at a reference position by capturing, as the first color loading pattern, an image having a first color background and a white portion at the reference position;
obtaining the second color loading luminance at the reference position by capturing, as the second color loading pattern, an image having a second color background and the white portion at the reference position; and
obtaining the third color loading luminance at the reference position by capturing, as the third color loading pattern, an image having a third color background and the white portion at the reference position.

3. The method of claim 2 , wherein the first color, second color, and third color loading luminances are obtained at a plurality of reference positions comprising the reference position.

4. The method of claim 3 , wherein the first color loading luminance at the plurality of reference positions is obtained by sequentially capturing a plurality of images having the first color background and respectively having a plurality of white portions at the plurality of reference positions,
wherein the second color loading luminance at the plurality of reference positions is obtained by sequentially capturing a plurality of images having the second color background and respectively having the plurality of white portions at the plurality of reference positions, and
wherein the third color loading luminance at the plurality of reference positions is obtained by sequentially capturing a plurality of images having the third color background and respectively having the plurality of white portions at the plurality of reference positions.

5. The method of claim 3 , wherein the first color loading luminance at the plurality of reference positions is obtained by capturing a single image having the first color background and a plurality of white portions at the plurality of reference positions,
wherein the second color loading luminance at the plurality of reference positions is obtained by capturing a single image having the second color background and the plurality of white portions at the plurality of reference positions, and
wherein the third color loading luminance at the plurality of reference positions is obtained by capturing a single image having the third color background and the plurality of white portions at the plurality of reference positions.

6. The method of claim 1 , further comprising:
obtaining the black loading luminance by capturing a black loading pattern,
wherein calculating the first color, second color, and third color scale factors comprises:
calculating the luminance decrease ratio of the white loading luminance by dividing the difference between the white loading luminance and the black loading luminance by the black loading luminance;
calculating the luminance decrease ratio of the first color loading luminance by dividing a difference between the first color loading luminance and the black loading luminance by the black loading luminance;
calculating the luminance decrease ratio of the second color loading luminance by dividing a difference between the second color loading luminance and the black loading luminance by the black loading luminance;
calculating the luminance decrease ratio of the third color loading luminance by dividing a difference between the third color loading luminance and the black loading luminance by the black loading luminance;
calculating the first color scale factor by dividing the luminance decrease ratio of the white loading luminance by the luminance decrease ratio of the first color loading luminance;
calculating the second color scale factor by dividing the luminance decrease ratio of the white loading luminance by the luminance decrease ratio of the second color loading luminance; and
calculating the third color scale factor by dividing the luminance decrease ratio of the white loading luminance by the luminance decrease ratio of the third color loading luminance.

7. The method of claim 6 , wherein the first color, second color, and third color scale factors are obtained at a plurality of reference positions.

8. The method of claim 1 , wherein the white, first color, second color, and third color loading luminances are obtained at a maximum gray level, and
wherein the first color, second color, and third color scale factors are obtained at the maximum gray level.

9. The method of claim 1 , wherein the white, first color, second color, and third color loading luminances are obtained at entire gray levels used in the display device, and
wherein the first color, second color, and third color scale factors are obtained at the entire gray levels.

10. The method of claim 1 , wherein the white, first color, second color, and third color loading luminances are obtained at a plurality of reference gray levels that is a portion of entire gray levels used in the display device, and
wherein the first color, second color, and third color scale factors are obtained at the plurality of reference gray levels.

11. The method of claim 1 , wherein when the input image data represents the single color image, the input image data is compensated using the first color, second color, and third color compensation value sets to which the first color, second color, and third color scale factors are not applied, and
wherein when the input image data represents the mixed color image, the input image data is compensated using the first color, second color, and third color compensation value sets to which the first color, second color, and third color scale factors are respectively applied.

12. The method of claim 11 , wherein the first color, second color, and third color scale factors are applied to the first color, second color, and third color compensation value sets by using an equation, “FINAL_COMP_VAL=1−((1−COMP_VAL)*SCALE_FACTOR)”, and
wherein COMP_VAL represents a compensation value in a corresponding one of the first color, second color, and third color compensation value sets, SCALE_FACTOR represents a corresponding one of the first color, second color, and third color scale facto

Assignees

• Samsung Display Co Ltd

Inventors

• Hong Seok Ha
• Kwag Dong Joon
• Kim Hyung Jin
• Park Ji-Eun
• Park Hye-Sang
• Yoo Hyun Seuk
• Hwang Hee Chui

Classifications

• G09G3/2007

  Display of intermediate tones · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title

• G09G3/20 Primary

  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} · CPC title

• G09G2320/0686

  with two or more screen areas displaying information with different brightness or colours · CPC title

• G09G3/3208

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