Image Display Method for a Half-Source Driving Liquid Crystal Display

• US 20150235602A1
• Filed: 09/11/2014
• Published: 08/20/2015
• Est. Priority Date: 02/17/2014
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lin, Nan-Ying, Li, Chung-Lung, Liou, Fu-Yuan, Fu, Chung-Lin, Tseng, Hang-Chang
• Application Number:
  US14/483,164
• Publication Number:
  US 20150235602A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2310/027 Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 3/2018 by time modulation using two or more time intervals
• CPC Class Codes: G09G 3/3622 using a passive matrix G09G3/3674 - G09G3/3696 take precedence

Abstract

An image display method of a half-source-driving (HSD) liquid crystal display (LCD) for mitigating the screen flickering effect caused by applying a frame rate control (FRC) algorithm in the LCD includes providing a first gate sequence corresponding to a pixel array in the LCD display. If a target gray level of the pixel array is an average value of a first gray level and a second gray level, write the first gray level to a plurality of sub-pixels of the pixel array being charged first according to the first gate sequence, and write the second gray level smaller than the first gray level to a plurality of sub-pixels of the pixel array being charged latter according to the first gate sequence.

Claims

1. An image display method for a half-source-driving liquid crystal display, the liquid crystal display comprising a plurality of pixel arrays, a plurality of gate lines, and a plurality of data lines, each pixel array comprising a plurality of sub-pixels, two adjacent sub-pixels coupled to a data line and disposed at two different sides of the data line being coupled to two consecutive gate lines, the image display method comprising:

providing a first gate sequence to a pixel array of the liquid crystal display; and

if a target gray level of the pixel array equals to an average value of a first gray level and a second gray level, writing the first gray level to a plurality of sub-pixels of the pixel array being charged first according to the first gate sequence and writing the second gray level to a plurality of sub-pixels of the pixel array being charged latter according to the first gate sequence;

wherein the first gray level is greater than the second gray level.

2. The method of claim 1, wherein the pixel array is a 4N×

4N matrix, where N is a positive integer.

3. The method of claim 1, wherein a group of sub-pixels of the plurality of sub-pixels coupled to two odd-ordered gate lines and two even-ordered gate lines of eight consecutive gate lines are enabled based on four odd-ordered elements of the first gate sequence, and another group of sub-pixels of the plurality of sub-pixels coupled to another two odd-ordered gate lines and another two even-ordered gate lines of the eight consecutive gate lines are enabled based on four even-ordered elements of the first gate sequence.

4. The method of claim 1, further comprising:

providing a second gate sequence to the pixel array of the liquid crystal display, wherein even-ordered elements of the first gate sequence are identical to odd-ordered elements of the second gate sequence, and odd-ordered elements of the first gate sequence are identical to even-ordered elements of the second gate sequence.

5. An image display method for a half-source-driving liquid crystal display, the liquid crystal display comprising a plurality of pixel arrays, a plurality of gate lines, and a plurality of data lines, each pixel array comprising a plurality of sub-pixels, two adjacent sub-pixels coupled to the a data line and disposed at two different sides of the data line being coupled to two consecutive gate lines, the image display method comprising:

providing a first gate sequence to a pixel array of the liquid crystal display; and

if a target gray level of the pixel array is closer to a second gray level than a first gray level, writing the first gray level to a first set of sub-pixels of the pixel array being charged first according to the first gate sequence, writing the second gray level to a second set of sub-pixels of the pixel array being charged first according to the first gate sequence, and writing the second gray level to a plurality of sub-pixels of the pixel array being charged latter according to the first gate sequence;

wherein the first gray level is greater than the second gray level.

6. The method of claim 5, wherein sub-pixels of the first set of sub-pixels are not adjacent to one another.

7. The method of claim 5, wherein the first set of sub-pixels and the second set of sub-pixels have a same number of sub-pixels.

8. The method of claim 5, wherein the pixel array is a 4N×

4N matrix, where N is a positive integer.

9. The method of claim 5, wherein a group of sub-pixels of the plurality of sub-pixels coupled to two odd-ordered gate lines and two even-ordered gate lines of eight consecutive gate lines are enabled based on four odd-ordered elements of the first gate sequence, and another group of sub-pixels of the plurality of sub-pixels coupled to another two odd-ordered gate lines and another two even-ordered gate lines of the eight consecutive gate lines are enabled based on four even-ordered elements of the first gate sequence.

10. The method of claim 5, further comprising:

providing a second gate sequence to the pixel array of the liquid crystal display, wherein even-ordered elements of the first gate sequence are identical to odd-ordered elements of the second gate sequence, and odd-ordered elements of the first gate sequence are identical to even-ordered elements of the second gate sequence.

11. The method of claim 5, wherein during four consecutive image frames, each sub-pixel of the pixel array is displayed with the first gray level in three image frames and displayed with the second gray level in one image frame.

12. An image display method for a half-source-driving liquid crystal display, the liquid crystal display comprising a plurality of pixel arrays, a plurality of gate lines, and a plurality of data lines, each pixel array comprising a plurality of sub-pixels, two adjacent sub-pixels coupled to a data line and disposed at two different sides of the data line being coupled to two consecutive gate lines, the image display method comprising:

providing a first gate sequence to a pixel array of the liquid crystal display; and

if a target gray level of the pixel array is closer to a first gray level than a second gray level, writing the first gray level to a plurality of sub-pixels of the pixel array being charged first according to the first gate sequence, writing the second gray level to a first set of sub-pixels of the pixel array being charged latter according to the first gate sequence, and writing the first gray level to a second set of sub-pixels of the pixel array being charged latter according to the first gate sequence;

wherein the first gray level is greater than the second gray level.

13. The method of claim 12, wherein sub-pixels of the first set of sub-pixels are not adjacent to one another.

14. The method of claim 12, wherein the first set of sub-pixels and the second set of sub-pixels have a same number of sub-pixels.

15. The method of claim 12, wherein the pixel array is a 4N×

4N matrix, where N is a positive integer.

16. The method of claim 12, wherein a group of sub-pixels of the plurality of sub-pixels coupled to two odd-ordered gate lines and two even-ordered gate lines of eight consecutive gate lines are enabled based on four odd-ordered elements of the first gate sequence, and another group of sub-pixels of the plurality of sub-pixels coupled to another two odd-ordered gate lines and another two even-ordered gate lines of the eight consecutive gate lines are enabled based on four even-ordered elements of the first gate sequence.

17. The method of claim 12, further comprising:

providing a second gate sequence to the pixel array of the liquid crystal display, wherein even-ordered elements of the first gate sequence are identical to odd-ordered elements of the second gate sequence, and odd-ordered elements of the first gate sequence are identical to even-ordered elements of the second gate sequence.

18. The method of claim 12, wherein during four consecutive image frames each sub-pixel of the pixel array is displayed with the first gray level in one image frame and displayed with the second gray level in three image frames.