Method and system for adjusting white balance, method for making liquid crystal display

Patent metadata

Field	Value
Publication number	US-9520076-B2
Application number	US-201414235546-A
Country	US
Kind code	B2
Filing date	Jan 9, 2014
Priority date	Dec 31, 2013
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

The present invention provides a method for adjusting white-balance, comprising the steps of: S 1 , entering a value of white-balance of a standard sample into a display panel; S 2 , controlling the display panel to display a test image having different grayscale value so as to attain a full grayscale value of the display panel; S 3 , determining whether the attained full grayscale value is within a specification, if yes, then proceeding into next step, and if no, then proceeding into step S 4 ; and S 4 , recalculating the white-balance value based on a difference between the attained full grayscale value and the white-balance value of the standard sample, and reentering the calculated white-balance value into display panel, and returning to step S 2 . The white balance adjusting system incorporated with such white balance adjusting method can be readily and quickly implemented into the existing production line of liquid crystal display panel.

First claim

The invention claimed is:

1. A method for adjusting white-balance, comprising the steps of:
S 1 , entering a value of white-balance of a standard sample into a display panel;
S 2 , controlling the display panel to display a test image having different grayscale value so as to attain a full grayscale value of the display panel;
S 3 , determining whether the attained full grayscale value is within a specification, if yes, then proceeding into next step, and if no, then proceeding into step S 4 ; and
S 4 , recalculating the white-balance value based on a difference between the attained full grayscale value and the white-balance value of the standard sample, and reentering the calculated white-balance value into display panel, and returning to step S 2 ;
wherein step S 2 comprises the following sub-steps:
S 21 , controlling the test image of the display panel;
S 22 , collecting brightness and colorfulness of the test image when it is displayed onto the display panel;
S 23 , converting the brightness and colorfulness under different grayscale into white field chromaticity and gamma value under different grayscale; and
S 24 , simulating a variation curve based on the white field chromaticity coordinate and gamma value according to the attained white field chromaticity and gamma value under tested grayscale, and attaining the white field chromaticity and gamma value of the display panel under full grayscale.

2. The method for adjusting white-balance as recited in claim 1 , wherein in step S 2 , the full grayscale data attained thereof is a coordinate value of a white field chromaticity coordinate and a gamma value under the full grayscale value.

3. The method for adjusting white balance as recited in claim 1 , wherein in step S 2 , a CCD image sensor is used to collect the brightness and colorfulness of the test image displayed on the display panel.

4. The method for adjusting white balance as recited in claim 1 , wherein the test image has 2 n number of different grayscale value, in which 0<n≦8, and n is a positive integer.

5. The method for adjusting white balance as recited in claim 4 , wherein the test image has sixteen (16) different values of grayscale.

6. The method for adjusting white balance as recited in claim 2 , wherein the test image has 2 n number of different grayscale value, in which 0<n≦8, and n is a positive integer.

7. The method for adjusting white balance as recited in claim 1 , wherein the test image has 2 n number of different grayscale value, in which 0<n≦8, and n is a positive integer.

8. The method for adjusting white balance as recited in claim 1 , wherein the specification of the white field chromaticity coordinate is set that the difference between the white field chromaticity coordinate and the white field chromaticity coordinate of the standard sample is located out of ±0.5% of the white field chromaticity of the standard sample; the difference between the gamma value of the display panel and the gamma value of standard sample is within ±0.2.

9. A method for making liquid crystal display, including assembling liquid crystal display panel and adjusting a white balance of the liquid crystal display panel, wherein the white balance of the liquid crystal display panel is conducted by the method for adjusting white balance as recited in claim 1 .

10. The method for making liquid crystal display as recited in claim 9 , wherein in step S 2 , the full grayscale data attained thereof is a coordinate value of a white field chromaticity coordinate and a gamma value under the full grayscale value.

11. The method for making liquid crystal display as recited in claim 9 , wherein in step S 2 , a CCD image sensor is used to collect the brightness and colorfulness of the test image displayed on the display panel.

12. The method for making liquid crystal display as recited in claim 9 , wherein the test image has 2 n number of different grayscale value, in which 0<n≦8, and n is a positive integer.

13. The method for making liquid crystal display as recited in claim 12 , wherein the test image has sixteen (16) different values of grayscale.

14. The method for making liquid crystal display as recited in claim 10 , wherein the test image has 2 n number of different grayscale value, in which 0<n≦8, and n is a positive integer.

15. The method for making liquid crystal display as recited in claim 9 , wherein the test image has 2 n number of different grayscale value, in which 0<n≦8, and n is a positive integer.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Wu Jinjun
• Kang Chih-Tsung

Classifications

• G09G3/2003 Primary

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

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title