Method for Driving LCD Monitor

• US 20080094332A1
• Filed: 01/21/2007
• Published: 04/24/2008
• Est. Priority Date: 10/24/2006
• Status: Active Grant

• Current Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Original Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Inventors: Tseng, Ching-Wu
• Granted Patent: US 7,948,462 B2
• Time in Patent Office: Days
• US Class Current: 345/89
• CPC Class Codes: G09G 2310/0224 Details of interlacing
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0238 Improving the black level
• CPC Class Codes: G09G 3/2022 using sub-frames
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

A method for driving an LCD monitor includes providing a common-voltage signal having a level conversion during each frame duration, dividing each frame duration into a first sub-frame duration and a second sub-frame duration according to a position having the level conversion of the common-voltage signal, driving a first set of pixel units during the first sub-frame duration according to a level of the common-voltage signal within the first sub-frame duration, and driving a second set of pixel units during the second sub-frame duration according to a level of the common-voltage signal within the second sub-frame duration.

Claims

1. A method for driving a liquid crystal display (LCD) monitor for displaying a plurality of frame data during a plurality of frame durations comprising:

providing a common-voltage signal having a level conversion during each frame duration;

dividing each frame duration into a first sub-frame duration and a second sub-frame duration according to a position having the level conversion of the common-voltage signal;

driving a first set of pixel units during the first sub-frame duration according to a level of the common-voltage signal within the first sub-frame duration; and

driving a second set of pixel units during the second sub-frame duration according to a level of the common-voltage signal within the second sub-frame duration.

2. The method of claim 1, wherein the first set of pixel units is different from the second set of pixel units.

3. The method of claim 1, wherein the first set of pixel units is corresponding to a plurality of odd horizontal lines in a panel of the LCD monitor.

4. The method of claim 1, wherein the first set of pixel units is corresponding to a plurality of even horizontal lines in a panel of the LCD monitor.

5. The method of claim 1, wherein the first set of pixel units and the second set of pixel units are arrayed interlacedly one group by one group.

6. The method of claim 5, wherein each group is corresponding to two adjacent horizontal lines in the panel of the LCD monitor.

7. The method of claim 1, wherein the first sub-frame duration is prior to the second sub-frame duration in each frame duration.

8. The method of claim 1 further comprising:

comparing brightness generated by the first set of pixel units and the second set of pixel units; and

adjusting the level of the common-voltage signal during the second sub-frame duration of each frame duration according to a brightness difference between the first set of pixel units and the second set of pixel units.