Method for Driving Liquid Crystal Display

• US 20080068319A1
• Filed: 03/07/2007
• Published: 03/20/2008
• Est. Priority Date: 09/15/2006
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lai, Ming-Sheng, Huang, Hsueh-Ying, Chou, Yu-Hui
• Application Number:
  US11/683,111
• Publication Number:
  US 20080068319A1
• Time in Patent Office: Days
• US Class Current: 345/89
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2310/0237 Switching ON and OFF the backlight within one frame
• CPC Class Codes: G09G 2310/063 Waveforms for resetting the whole screen at once
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A method for driving a liquid crystal display is disclosed. A driving voltage corresponding to a gray scale is provided during a first interval of a time period to drive a pixel in response to the gray scale, and a reset voltage responsive to the gray scale is provided during a second interval of the time period.

Claims

1. A method for driving a liquid crystal display, comprising:

providing a driving voltage corresponding to a gray scale during a first interval of a time period to drive a pixel in response to the gray scale; and

providing a reset voltage responsive to the gray scale during a second interval of the time period.

2. The method of claim 1, wherein the time period is one of a plurality of subframe times of a frame time.

3. The method of claim 1, further comprising turning on a backlight in the first interval.

4. The method of claim 3, wherein the backlight comprises a red, green, or blue backlight.

5. The method of claim 1, wherein the absolute value of the reset voltage is larger than or equal to the absolute value of the driving voltage.

6. The method of claim 1, wherein different gray scales corresponding to different driving voltages are divided into a first group of gray scales and a second group of gray scales, and when the gray scale in the first interval is one of the first group of gray scales, the reset voltage is a first voltage;

and when the gray scale in the first interval is one of the second group of gray scales, the reset voltage is a second voltage different from the first voltage.

7. The method of claim 1, wherein the reset voltage has different absolute values corresponding to different groups of gray scales.

8. A method for driving a liquid crystal display, comprising:

providing a driving voltage to a pixel to display an image during a first interval of each time period; and

providing a reset voltage to the pixel during a second interval of each time period, wherein the reset voltages in two adjacent time periods are different.

9. The method of claim 8, wherein a backlight is provided to illuminate the pixel in the first interval.

10. The method of claim 9, wherein the backlight is a red, green, or blue backlight.

11. The method of claim 8, wherein an absolute value of the reset voltage is larger than or equal to an absolute value of the driving voltage in one time period.

12. The method of claim 8, wherein gray scales corresponding to different driving voltages are divided into a first group of gray scales and a second group of gray scales, and when the gray scale in the first interval is one of the first group of gray scales, the reset voltage is a first voltage;

and when the gray scale in the first interval is one of the second group of gray scales, the reset voltage is a second voltage, which is different from the first voltage.

13. The method of claim 8, wherein the reset voltage has different absolute values corresponding to different groups of gray scales.

14. A method for driving a liquid crystal display, comprising:

providing a driving voltage corresponding to a gray scale during a first interval of a time period to drive a pixel in response to the gray scale, and providing a backlight to illuminate the pixel in the first interval; and

providing a reset voltage responsive to the backlight during a second interval of the time period.

15. The method of claim 14, wherein the time period is one of a plurality of subframe times of a frame time.

16. The method of claim 15, wherein colors of the backlights in two adjacent subframe times are different.

17. The method of claim 15, wherein the backlight provided in the subframe times is a red, green, and blue backlight sequentially.

18. The method of claim 15, wherein the reset voltage in one of two adjacent subframe times is a first voltage, and the reset voltage in the other one of two adjacent subframe times is a second voltage different from the first voltage.