Color shift compensation method and device

Patent metadata

Field	Value
Publication number	US-2016293121-A1
Application number	US-201514778318-A
Country	US
Kind code	A1
Filing date	Apr 22, 2015
Priority date	Apr 1, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

The color shift compensation method comprises: receiving target input gray scale data of a target sub pixel dot in a present line, and acquiring previous output gray scale data of a sub pixel dot of the previous line in the same display data line of the target sub pixel dot, and then, implementing digital to analog conversion to the target output gray scale data of the target sub pixel dot simultaneously corresponding to the target input gray scale data and the previous output gray scale data with combination of the target relationship table to acquire the target voltage of the target sub pixel dot, and ultimately, adjusting a color displayed by a target pixel where the target sub pixel dot is. With the present invention, the color shift issue due to the resistance difference of the fan section can be solved to promote the display effect.

First claim

What is claimed is:

1 . A color shift compensation method, applied in a liquid crystal display panel, wherein the liquid crystal display panel is divided into a plurality of display areas, and each display area comprises a plurality of display lines aligned in row, and each display line comprises a plurality of pixel dots aligned in column, and each pixel dot comprises at least three sub pixel dots aligned in row, wherein:
receiving target input gray scale data of a target sub pixel dot in a present line, and acquiring previous output gray scale data of a sub pixel dot of the previous line in the same display data line of the target sub pixel dot; querying target output gray scale data of the target sub pixel dot simultaneously corresponding to the target input gray scale data and the previous output gray scale data with combination of a target relationship table according to the target input gray scale data and the previous output gray scale data, wherein the target relationship table comprises corresponding relationships of input gray scale data of sub pixel dot of any row, output gray scale data of sub pixel dot of last row of the sub pixel dot of any row and output gray scale data of sub pixel dot of any row; implementing digital to analog conversion to the target output gray scale data to acquire a target voltage of the target sub pixel dot; adjusting a color displayed by a target pixel where the target sub pixel dot is according to the target voltage.

2 . The method according to claim 1 , wherein the step of querying target output gray scale data of the target sub pixel dot simultaneously corresponding to the target input gray scale data and the previous output gray scale data from the target relationship table according to the target input gray scale data and the previous output gray scale data comprises:
selecting any one display area in all display areas of the liquid crystal display panel to be a target display area; querying middle output gray scale data of the target sub pixel dot simultaneously corresponding to the target input gray scale data and the previous output gray scale data from the target relationship table according to the target input gray scale data and the previous output gray scale data, wherein the target relationship table comprises corresponding relationships of input gray scale data of sub pixel dot of any row of the target display area, output gray scale data of sub pixel dot of last row of the sub pixel dot of any row and output gray scale data of sub pixel dot of any row; acquiring a relationship coefficient between the output gray scale data of the predetermined target display area and the output gray scale data of the display area where the target sub pixel dot is; determining the target output gray scale data of the target sub pixel dot according to the middle output gray scale data and the relationship coefficient.

3 . The method according to claim 1 , wherein the target relationship table comprises corresponding relationships of input gray scale data of sub pixel dot of any row, output gray scale data of sub pixel dot of last row of the sub pixel dot of any row and output gray scale data of sub pixel dot of any row.

4 . The method according to claim 1 , wherein the step of adjusting a color displayed by a target pixel where the target sub pixel dot is according to the target voltage comprises:
adjusting a voltage of the target sub pixel dot to the target voltage; twisting liquid crystal molecules of the target sub pixel dot to a target twist angle according to the target voltage; adjusting a light intensity of the target sub pixel dot according to the target twist angle to adjust a color displayed by a target pixel where the target sub pixel dot is.

5 . The method according to claim 4 , wherein after receiving the target input gray scale data of the target sub pixel dot in the present line, and acquiring the previous output gray scale data of the sub pixel dot of the previous line in the same display data line of the target sub pixel dot, the method further comprises:
judging whether the target input gray scale data and the previous output gray scale data are identical or not; if not, then executing the step of querying the target output gray scale data of the target sub pixel dot simultaneously corresponding to the target input gray scale data and the previous output gray scale data with combination of the target relationship table according to the target input gray scale data and the previous output gray scale data.

6 . A color shift compensation device, applied in a liquid crystal display panel, wherein the liquid crystal display panel is divided into a plurality of display areas, and each display area comprises a plurality of display lines aligned in row, and each display line comprises a plurality of pixel dots aligned in column, and each pixel dot comprises at least three sub pixel dots aligned in row, wherein:
an acquiring unit, receiving target input gray scale data of a target sub pixel dot in a present line, and acquiring previous output gray scale data of a sub pixel dot of the previous line in the same display data line of the target sub pixel dot; a querying unit, querying target output gray scale data of the target sub pixel dot simultaneously corresponding to the target input gray scale data and the previous output gray scale data with combination of a target relationship table according to the target input gray scale data and the previous output gray scale data acquired by the acquiring unit, wherein the target relationship table comprises corresponding relationships of input gray scale data of sub pixel dot of any row, output gray scale data of sub pixel dot of last row of the sub pixel dot of any row and output gray scale data of sub pixel dot of any row; a digital to analog conversion unit, implementing digital to analog conversion to the target output gray scale data queried by the querying unit to acquire a target voltage of the target sub pixel dot; an adjusting unit, adjusting a color displayed by a target pixel where the target sub pixel dot is according to the target voltage acquired by the digital to analog conversion unit.

7 . The device according to claim 6 , wherein the querying unit comprises a selecting sub unit, a querying sub unit, an acquiring sub unit and a determining sub unit, wherein:
the selecting unit is employed for selecting any one display area in all display areas of the liquid crystal display panel to be a target display area; the querying sub unit is employed for querying middle output gray scale data of the target sub pixel dot simultaneously corresponding to the target input gray scale data and the previous output gray scale data from the target relationship table according to the target input gray scale data and the previous output gray scale data, wherein the target relationship table comprises corresponding relationships of input gray scale data of sub pixel dot of any row of the target display area, output gray scale data of sub pixel dot of last row of the sub pixel dot of any row and output gray scale data of sub pixel dot of any row; the acquiring sub unit is employed for acquiring a relationship coefficient between the output gray scale data of the predetermined target display area and the output gray scale data of the display area where the target sub pixel dot is; the determining sub unit is employed for determining the target output gray scale data of the target sub pixel dot according to the middle output gray scale data queried by the querying sub unit and the relationship coefficient acquired by the acquiring sub unit.

8 . The device according to claim 6 , wherein the target relationship table comprises corresponding relationshi

Assignees

• Shenzhen China Star Optoelect

Inventors

• Zeng Dekang
• Chen Yu-Yeh
• Guo Dongsheng

Classifications

• H04N1/465

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• G09G2320/0666

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• G09G2320/0223

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