Drive method and drive device of liquid crystal display based on different gray scale values applied to two pixels of same color

• US 9,799,304 B2
• Filed: 03/20/2015
• Issued: 10/24/2017
• Est. Priority Date: 03/09/2015
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Chen, Yu-yeh, Guo, Dongsheng, Zhu, Jiang, Sun, Lei, Chu, Li-wei, He, Jhen-wei
• Primary Examiner(s): Lee, Benjamin C
• Assistant Examiner(s): Zheng, Xuemei
• Application Number:
  US14/443,644
• Publication Number:
  US 20160267856A1
• Time in Patent Office: 949 Days
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 5/026 Control of mixing and/or overlay of colours in general G09G5/022 and G09G5/024 take precedence

Abstract

The present invention provides a drive method and a drive device of a liquid crystal display, and the drive method comprises: receiving an image to display; employing the original gray scale values of the respective primary color components of the respective image pixels of the image to display to respectively generate a first display gray scale value and a second display gray scale value; employing the first display gray scale value and the second display gray scale value to respectively control display brightnesses of two display pixels of the same color on a liquid crystal panel, wherein the first display gray scale value is larger than the second display gray scale value. With the aforesaid arrangement, the present invention can reduce the color washout under large view angle to promote the display effect of the large view angle.

Claims

1. A drive method of a liquid crystal display, wherein the drive method comprises:

receiving an image to be displayed;

employing original gray scale values of respective primary color components of respective image pixels of the image to be displayed to respectively generate a first display gray scale value and a second display gray scale value for each of the respective primary color components in each of the respective image pixels; and

employing the first display gray scale value and the second display gray scale value associated with a primary color component in one image pixel to respectively control display brightnesses of two display pixels of the same color on a liquid crystal panel for rendering the primary color component of the image pixel, wherein the first display gray scale value is larger than the second display gray scale value;

wherein before the step of employing the original gray scale values of the respective primary color components of the respective image pixels of the image to be displayed to respectively generate the first display gray scale value and the second display gray scale value, the method further comprises;

implementing skin color detection to the image pixels of the image to be displayed to determine a nude pixel and a non-skin color pixel;

setting different skin color weights for the nude pixel and the non-skin color pixel; and

implementing adjustment to the original gray scale values of the respective primary color components of the nude pixel to make a difference between a relatively higher original gray scale value and a relatively lower original gray scale value before adjustment become larger after adjustment for the same nude pixel;

wherein the step of employing the original gray scale values of the respective primary color components of the respective image pixels of the image to be displayed to respectively generate the first display gray scale value and the second display gray scale value comprises;

employing the skin color weights to set a ratio of the first display gray scale value and the second display gray scale value for each of the respective primary color components in each of the respective image pixels so as to make the ratio of the first display gray scale value and the second display gray scale value of the nude pixel larger than the ratio of the first display gray scale value and the second display gray scale value of each of the primary color component of the non-skin color pixel.