IMAGE PROCESSING METHOD OF A DISPLAY FOR REDUCING COLOR SHIFT

• US 20160267685A1
• Filed: 07/13/2015
• Published: 09/15/2016
• Est. Priority Date: 03/10/2015
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Yang, Meng-Huan, Hsu, Ting-Wei, Chen, Chien-Wen
• Granted Patent: US 9,728,160 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607

Abstract

An image processing method of a display includes transforming three color image data to four color image data, passing the four color image data through a kernel filter to generate original data corresponding to a first sub pixel and a second sub pixel, and transforming original data of each sub pixel to generate display data of the sub pixel. The original data of the first sub pixel is the same as the original data of the second sub pixel. The brightness of the display data of the first sub pixel is substaintially greater than the original data of the first sub pixel. The brightness of the display data of the second sub pixel is substaintially smaller than the original data of the second sub pixel.

Claims

1. An image processing method of a display, comprising:

transforming a three color image data to a four color image data;

the four color image data passing through a kernel filter to generate original data corresponding to a first sub pixel, a second sub pixel, a third sub pixel, and a fourth sub pixel disposed in sequence, wherein the second sub pixel is adjacent to the first sub pixel and the third sub pixel, the third sub pixel is adjacent to the fourth sub pixel, and the first sub pixel, the second sub pixel, the third sub pixel, and the fourth sub pixel are sub pixels with different colors;

transforming an original data of the first sub pixel to generate a first display data of the first sub pixel, wherein a brightness of the first display data of the first sub pixel is substaintially greater than a brightness of the original data of the first sub pixel;

transforming an original data of the second sub pixel to generate a first display data of the second sub pixel, wherein a brightness of the first display data of the second sub pixel is substaintially smaller than a brightness of the original data of the second sub pixel;

transforming an original data of the third sub pixel to generate a first display data of the third sub pixel, wherein a brightness of the first display data of the third sub pixel is substaintially greater than a brightness of the original data of the third sub pixel;

transforming an original data of the fourth sub pixel to generate a first display data of the fourth sub pixel, wherein a brightness of the first display data of the fourth sub pixel is substaintially smaller than a brightness of the original data of the fourth sub pixel; and

displaying a first frame of image on the display according to the first display data of the first sub pixel, the first display data of the second sub pixel, the first display data of the third sub pixel, and the first display data of the fourth sub pixel.

2. The method of claim 1, further comprising:

transforming the original data of the first sub pixel to generate a second display data of the first sub pixel, wherein a brightness of the second display data of the first sub pixel is substaintially smaller than the brightness of the original data of the first sub pixel;

transforming the original data of the second sub pixel to generate a second display data of the second sub pixel, wherein a brightness of the second display data of the second sub pixel is substaintially greater than the brightness of the original data of the second sub pixel;

transforming the original data of the third sub pixel to generate a second display data of the third sub pixel, wherein a brightness of the second display data of the third sub pixel is substaintially smaller than the brightness of the original data of the third sub pixel;

transforming the original data of the fourth sub pixel to generate a second display data of the fourth sub pixel, wherein a brightness of the second display data of the fourth sub pixel is substaintially greater than the brightness of the original data of the fourth sub pixel; and

displaying a second frame of image on the display at least according to the second display data of the first sub pixel, the second display data of the second sub pixel, the second display data of the third sub pixel, and the second display data of the fourth sub pixel.

3. The method of claim 1, wherein the first sub pixel, the second sub pixel, the third sub pixel and the fourth sub pixel are sub pixels disposed in a same column or in a same row.

4. The method of claim 1, wherein the four color image data passes through the kernel filter to further generate original data corresponding to a fifth sub pixel, a sixth sub pixel, a seventh sub pixel, and an eighth sub pixel disposed in sequence, wherein the fifth sub pixel is adjacent to the first sub pixel, the sixth sub pixel is adjacent to the second sub pixel, the fifth sub pixel and the seventh sub pixel, the seventh sub pixel is adjacent to the third sub pixel and the eighth sub pixel, the eighth sub pixel is adjacent to the fourth sub pixel, and the fifth sub pixel, the sixth sub pixel, the seventh sub pixel, and the eighth sub pixel are sub pixels with different colors, the method further comprises:

transforming an original data of the fifth sub pixel to generate a first display data of the fifth sub pixel, wherein a brightness of the first display data of the fifth sub pixel is substaintially smaller than a brightness of the original data of the fifth sub pixel;

transforming an original data of the sixth sub pixel to generate a first display data of the sixth sub pixel, wherein a brightness of the first display data of the sixth sub pixel is substaintially greater than a brightness of the original data of the sixth sub pixel;

transforming an original data of the seventh sub pixel to generate a first display data of the seventh sub pixel, wherein a brightness of the first display data of the seventh sub pixel is substaintially smaller than a brightness of the original data of the seventh sub pixel; and

transforming an original data of the eighth sub pixel to generate a first display data of the eighth sub pixel, wherein a brightness of the first display data of the eighth sub pixel is substaintially greater than a brightness of the original data of the eighth sub pixel;

wherein displaying the first frame of image on the display according to the first display data of the first sub pixel, the first display data of the second sub pixel, the first display data of the third sub pixel, and the first display data of the fourth sub pixel is displaying the first frame of image on the display at least according to the first display data of the first sub pixel, the first display data of the second sub pixel, the first display data of the third sub pixel, the first display data of the fourth sub pixel, the first display data of the fifth sub pixel, the first display data of the sixth sub pixel, the first display data of the seventh sub pixel, and the first display data of the eighth sub pixel.

5. An image processing method of a display, comprising:

transforming a three color image data to a four color image data;

the four color image data passing through a kernel filter to generate original data corresponding to a first sub pixel, a second sub pixel, a third sub pixel, and a fourth sub pixel disposed in sequence, wherein the second sub pixel is adjacent to the first sub pixel and the third sub pixel, the third sub pixel is adjacent to the fourth sub pixel, and the first sub pixel, the second sub pixel, the third sub pixel, and the fourth sub pixel are sub pixels with different colors;

transforming an original data of the first sub pixel to generate a first display data of the first sub pixel, wherein a brightness of the first display data of the first sub pixel is substaintially greater than a brightness of the original data of the first sub pixel;

transforming an original data of the second sub pixel to generate a first display data of the second sub pixel, wherein a brightness of the first display data of the second sub pixel is substaintially greater than a brightness of the original data of the second sub pixel;

transforming an original data of the third sub pixel to generate a first display data of the third sub pixel, wherein a brightness of the first display data of the third sub pixel is substaintially smaller than a brightness of the original data of the third sub pixel;

transforming an original data of the fourth sub pixel to generate a first display data of the fourth sub pixel, wherein a brightness of the first display data of the fourth sub pixel is substaintially smaller than a brightness of the original data of the fourth sub pixel; and

displaying a first frame of image on the display at least according to the first display data of the first sub pixel, the first display data of the second sub pixel, the first display data of the third sub pixel, and the first display data of the fourth sub pixel.

6. The method of claim 5, further comprising:

transforming the original data of the first sub pixel to generate a second display data of the first sub pixel, wherein a brightness of the second display data of the first sub pixel is substaintially smaller than the brightness of the original data of the first sub pixel;

transforming the original data of the second sub pixel to generate a second display data of the second sub pixel, wherein a brightness of the second display data of the second sub pixel is substaintially smaller than the brightness of the original data of the second sub pixel;

transforming the original data of the third sub pixel to generate a second display data of the third sub pixel, wherein a brightness of the second display data of the third sub pixel is substaintially greater than the brightness of the original data of the third sub pixel;

transforming the original data of the fourth sub pixel to generate a second display data of the fourth sub pixel, wherein a brightness of the second display data of the fourth sub pixel is substaintially greater than the brightness of the original data of the fourth sub pixel; and

displaying a second frame of image on the display according to the second display data of the first sub pixel, the second display data of the second sub pixel, the second display data of the third sub pixel, and the second display data of the fourth sub pixel.

7. The method of claim 5, wherein the first sub pixel, the second sub pixel, the third sub pixel and the fourth sub pixel are sub pixels disposed in a same column or in a same row.

8. The method of claim 5, wherein the four color image data passes through the kernel filter to further generate original data corresponding to a fifth sub pixel, a sixth sub pixel, a seventh sub pixel, and an eighth sub pixel disposed in sequence, wherein the fifth sub pixel is adjacent to the first sub pixel, the sixth sub pixel is adjacent to the second sub pixel, the fifth sub pixel and the seventh sub pixel, the seventh sub pixel is adjacent to the third sub pixel and the eighth sub pixel, the eighth sub pixel is adjacent to the fourth sub pixel, and the fifth sub pixel, the sixth sub pixel, the seventh sub pixel, and the eighth sub pixel are sub pixels with different colors, the method further comprises:

transforming an original data of the fifth sub pixel to generate a first display data of the fifth sub pixel, wherein a brightness of the first display data of the fifth sub pixel is substaintially greater than a brightness of the original data of the fifth sub pixel;

transforming an original data of the sixth sub pixel to generate a first display data of the sixth sub pixel, wherein a brightness of the first display data of the sixth sub pixel is substaintially greater than a brightness of the original data of the sixth sub pixel;

transforming an original data of the seventh sub pixel to generate a first display data of the seventh sub pixel, wherein a brightness of the first display data of the seventh sub pixel is substaintially smaller than a brightness of the original data of the seventh sub pixel; and

transforming an original data of the eighth sub pixel to generate a first display data of the eighth sub pixel, wherein a brightness of the first display data of the eighth sub pixel is substaintially smaller than a brightness of the original data of the eighth sub pixel;

wherein displaying the first frame of image on the display according to the first display data of the first sub pixel, the first display data of the second sub pixel, the first display data of the third sub pixel, and the first display data of the fourth sub pixel is displaying the first frame of image on the display at least according to the first display data of the first sub pixel, the first display data of the second sub pixel, the first display data of the third sub pixel, the first display data of the fourth sub pixel, the first display data of the fifth sub pixel, the first display data of the sixth sub pixel, the first display data of the seventh sub pixel, and the first display data of the eighth sub pixel.

9. The method of claim 5, wherein:

the four color image data passes through the kernel filter to further generate original data of a fifth sub pixel from an edge in the four color image data; and

displaying the first frame of image on the display according to the first display data of the first sub pixel, the first display data of the second sub pixel, the first display data of the third sub pixel, and the first display data of the fourth sub pixel is displaying the first frame of image on the display at least according to the first display data of the first sub pixel, the first display data of the second sub pixel, the first display data of the third sub pixel, the first display data of the fourth sub pixel, and athe original data of the fifth sub pixel.

10. The method of claim 5, wherein:

transforming the original data of the first sub pixel to generate the first display data of the first sub pixel is transforming the original data of the first sub pixel to generate the first display data of the first sub pixel according to a characteristic table of color shift and viewing angle of the display;

transforming the original data of the second sub pixel to generate the first display data of the second sub pixel is transforming the original data of the second sub pixel to generate the first display data of the second sub pixel according to the characteristic table of color shift and viewing angle of the display;

transforming the original data of the third sub pixel to generate the first display data of the third sub pixel is transforming the original data of the third sub pixel to generate the first display data of the third sub pixel according to the characteristic table of color shift to view angle and the display;

transforming the original data of the fourth sub pixel to generate the first display data of the fourth sub pixel is transforming the original data of the fourth sub pixel to generate the first display data of the fourth sub pixel according to the characteristic table of color shift to view angle and the display.

11. An image processing method of a display, wherein the display comprises a plurality of pixels, each of pixel comprises a first color sub pixel, a second color sub pixel, a third color sub pixel, and a fourth color sub pixel, sub pixels of a pixel are disposed in a same row, and the method comprises:

inputting a three color image data, wherein the three color image comprises a first color data, a second color data, and a third color data; and

when a grayscale of the first color data is substaintially greater than zero and grayscales of the second color data and the third color data are zero, a grayscale displayed by the first color sub pixel is different from the grayscale of the first color data, and grayscales displayed by the second color sub pixel, the third color sub pixel, and the fourth color sub pixel are zero.

12. The method of claim 11, wherein grayscales displayed by first color sub pixels in a same row or in a same column are the same.

13. The method of claim 11, wherein grayscales displayed by first color sub pixels in two adjacent rows or in two adjacent columns are different from each other.