Chrominance visual angle correction method for display, and intelligent terminal and storage medium

Patent metadata

Field	Value
Publication number	US-11900846-B2
Application number	US-202017757075-A
Country	US
Kind code	B2
Filing date	Sep 4, 2020
Priority date	Dec 9, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

The present application provides a chrominance visual angle correction method for a display, and an intelligent terminal and a storage medium. The method comprises: acquiring brightness data of different primary colors varying with the gray scale at a vertical visual angle and a squint visual angle, and generating a search database; splitting, according to the search database and a preset rule, a pixel gray scale of the display into a plurality of high and low gray scale combinations composed of high gray scales and low gray scales; calculating a scale of brightness of the plurality of high and low gray scale combinations, and acquiring a scale of brightness of high and low gray scale combination closest to a scale of vertical vision brightness as a primary color pixel gray scale.

First claim

What is claimed is:

1. A chrominance visual angle correction method for a display, comprising:
acquiring brightness data of primary colors Red (R), Green (G), and Blue (B) varying with gray scales at a vertical visual angle and at an oblique visual angle respectively, and generating a search database based on the brightness data;
splitting a pixel gray scale of the display into a plurality of high and low gray scale combinations according to the search database and a preset rule, wherein each of the plurality of high and low gray scale combinations comprises a first high gray scale and a first low gray scale corresponding to R, a second high gray scale and a second low gray scale corresponding to G, and a third high gray scale and a third low gray scale corresponding to B;
calculating a first ratio of brightness of R gray scale, brightness of G gray scale and brightness of B gray scale at the vertical visual angle before the splitting, and second ratios respectively corresponding to the plurality of high and low gray scale combinations at the oblique visual angle, wherein each of the second ratios is equal to a ratio of a sum of brightness of the first high gray scale and brightness of the first low gray scale, a sum of brightness of the second high gray scale and brightness of the second low gray scale, and a sum of brightness of the third high gray scale and brightness of the third low gray scale for one of the plurality of high and low gray scale combinations at the oblique visual angle; and
determining one of the second ratios closest to the first ratio, and determining one of the plurality of high and low gray scale combinations corresponding to the one of the second ratios as a primary color pixel gray scale.

2. The chrominance visual angle correction method for the display according to claim 1 , wherein the vertical visual angle corresponds to a first direction in which a user directly faces the display, and the oblique visual angle corresponds to a second direction with a preset angle difference from the first direction of the user and the display.

3. The chrominance visual angle correction method for the display according to claim 1 , wherein the search database comprises a first database of brightness of the primary colors at the vertical visual angle and a second database of the brightness of the primary colors at the squint visual angle; and
the generating of the search database comprises:
collecting and storing the brightness data of the primary colors at the vertical visual angle in a gray scale range of 0-255 to generate the first;
collecting and storing the brightness data of the primary colors at the oblique visual angle in the gray scale range of 0-255 to generate the second.

4. The chrominance visual angle correction method for the display according to claim 3 , wherein the preset rule is that the brightness of the pixel gray scale of the display before the splitting and after the splitting is same.

5. The chrominance visual angle correction method for the display according to claim 4 , wherein the splitting of the pixel gray scale of the display into the plurality of high and low gray scale combinations according to the search database and the preset rule comprises:
splitting the pixel gray scale of the display into the plurality of high and low gray scale combinations according to the first database and the preset rule that the brightness of the pixel gray scale of the display before the splitting and after the splitting is same, so that
for each of the primary colors, a sum of brightness of a high gray scale and brightness of a low gray scale in each of the high and low gray scale combinations is same as brightness of the pixel gray scale of the display.

6. The chrominance visual angle correction method for the display according to claim 5 , wherein the pixel gray scale of the display indicates that each pixel of the display is composed of gray scales of the primary colors R, G, and B.

7. The chrominance visual angle correction method for the display according to claim 5 , wherein a splitting rule of the pixel gray scale comprises gradually adding a preset value to a gray scale value for splitting.

8. The chrominance visual angle correction method for the display according to claim 5 , wherein the second ratios are calculated according to the second database,
the method further comprises:
writing the primary color pixel gray scale into the display.

9. The chrominance visual angle correction method for the display according to claim 8 , wherein at the vertical visual angle, the sum of the brightness of the high gray scale and the brightness of the low gray scale in each of the high and low gray scale combinations is same, and a ratio of the brightness of R gray scale, the brightness of G gray scale and the brightness of B gray scale is same; and at the oblique visual angle, the sum of the brightness of the high gray scale and the brightness of the low gray scale in each of the high and low gray scale combinations changes, and the ratio of the brightness of R gray scale, the brightness of G gray scale and the brightness of B gray scale changes.

10. The chrominance visual angle correction method for the display according to claim 1 , wherein
the brightness data of the search database is collected at every preset size of the gray scale; or
the brightness data of the search database is obtained by acquiring part of the brightness data and performing data fitting.

11. The chrominance visual angle correction method for the display according to claim 2 , wherein the preset angle difference is greater than 0° and less than 90°.

12. The chrominance visual angle correction method for the display according to claim 1 , wherein the display comprises: a light crystal display (LCD), an organic light emitting diode (OLED) display, a quantum-dot light emitting diode (QLED) display, or a micro-light emitting diode (micro-LED) display.

13. An intelligent terminal, wherein the intelligent terminal comprises: a memory, a processor, and a chrominance visual angle correction program for a display that is stored in the memory and executable by the processor, to perform operations comprising:
acquiring brightness data of primary colors Red (R), Green (G), and Blue (B) varying with gray scales at a vertical visual angle and at an oblique visual angle respectively, and generating a search database based on the brightness data;
splitting a pixel gray scale of the display into a plurality of high and low gray scale combinations according to the search database and a preset rule, wherein each of the plurality of high and low gray scale combinations comprises a first high gray scale and a first low gray scale corresponding to R, a second high gray scale and a second low gray scale corresponding to G, and a third high gray scale and a third low gray scale corresponding to B;
calculating a first ratio of brightness of R gray scale, brightness of G gray scale and brightness of B gray scale at the vertical visual angle before the splitting, and second ratios respectively corresponding to the plurality of high and low gray scale combinations at the oblique visual angle, wherein each of the second ratios is equal to a ratio of a sum of brightness of the first high gray scale and brightness of the first low gray scale, a sum of brightness of the second high gray scale and brightness of the second low gray scale, and a sum of brightness of the third high gray scale and brightness of the third low gray scale for one of the plurality of high and low gray scale combinations at the oblique visual angle; and
determining one of the second ratios closest to the first ratio,

Assignees

• Shenzhen Tcl New Tech Co Ltd

Inventors

• Xia Daxue
• Chen Lin
• Xie Renli

Classifications

• G09G3/2003 Primary

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title

• G09G2320/028

  by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction · CPC title

• G09G2320/0242

  Compensation of deficiencies in the appearance of colours · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title