DRIVING METHOD FOR A LIQUID CRYSTAL DISPLAY

• US 20050253793A1
• Filed: 05/11/2004
• Published: 11/17/2005
• Est. Priority Date: 05/11/2004
• Status: Abandoned Application

• Current Assignee: VastView Technology Inc.
• Original Assignee: VastView Technology Inc.
• Inventors: Chen, Yi-Fan, Shen, Yuh-Ren, Chen, Cheng-Jung, Chien, Liang-Chen, Shen, Yung-Hung
• Application Number:
  US10/709,506
• Publication Number:
  US 20050253793A1
• Time in Patent Office: Days
• US Class Current: 345/87
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 2340/16 Determination of a pixel data signal depending on the signal applied in the previous frame
• CPC Class Codes: G09G 3/2025 the sub-frames having all the same time duration
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A method for driving a liquid crystal display panel is disclosed. The liquid crystal display panel has a plurality of scan lines, a plurality of data lines, and a plurality of pixels. Each pixel is connected to a corresponding scan line and a corresponding data line, and each pixel has a liquid crystal element and a switching device connected to the corresponding scan line, the corresponding data line, and the liquid crystal element. The method sequentially receives a plurality of pieces of frame data and generates at least one over-drive data impulse and an original data impulse for each pixel every frame period according to the pieces of the frame data. The over-drive data impulse and the original data impulse are applied to the data line connected to the liquid crystal element of the pixel within one frame period.

Claims

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

a plurality of scan lines;

a plurality of data lines; and

a plurality of pixels, each pixel has a switching device and a liquid crystal element, and the switching device is connected to the corresponding scan line, the corresponding data line and the liquid crystal element;

the method comprising;

continuously receiving a plurality of frame data;

producing an over-drive data voltage pulse and an original data voltage pulse according to the frame data in every frame period; and

sequentially providing the over-drive data voltage pulse and the original data voltage pulse to the liquid crystal element of the pixel in one frame period via the connected data line.

2. The method of claim 1 further comprising:

delaying the frame data to produce a plurality of corresponding delayed frame data; and

deciding a value of the over-drive data voltage pulse by comparing a present frame data with the corresponding delayed frame data.

3. The method of claim 2, wherein when comparing the present frame data with the corresponding delayed frame data, the value of the over-drive data voltage pulse is decided according to a predetermined table.

4. The method of claim 1, wherein each frame data comprises a plurality of pixel data and each pixel data corresponds to one pixel.

5. The method of claim 1 further comprising:

providing a scan voltage to the switching device via the corresponding scan line to enable the over-drive data voltage pulse and the original data voltage pulse to be supplied to the liquid crystal element.

6. A method for driving a liquid crystal display panel, the liquid crystal display panel comprising:

a plurality of scan lines;

a plurality of data lines; and

a plurality of pixels, each pixel includes a switching device and a liquid crystal element, the switching device is connected to the corresponding scan line, the corresponding data line and the liquid crystal element;

the method comprising;

receiving a clock signal, a synchronization signal, and a plurality of frame data;

producing a double-frequency clock signal in accordance with the clock signal, and producing a double-frequency synchronization signal in accordance with the double-frequency clock signal and the synchronization signal;

producing at least an over-drive data voltage pulse and an original data voltage pulse in accordance with the frame data; and

sequentially providing the over-drive data voltage pulse and the original data voltage pulse to the liquid crystal element of the corresponding pixel in accordance with the double-frequency clock signal in one frame period.

7. The method of claim 6 further comprising:

delaying the frame data to produce a plurality of corresponding delayed frame data; and

deciding a value of the over-drive data voltage pulse by comparing a present frame data with the corresponding delayed frame data.

8. The method of claim 7, wherein when comparing the present frame data with the corresponding delayed frame data, the value of the over-drive data voltage pulse is decided according to a predetermined table.

9. The method of claim 6, wherein the synchronization signal includes a horizontal synchronization signal and a vertical synchronization signal.

10. The method of claim 6, wherein the double-frequency synchronization signal includes a horizontal double-frequency synchronization signal and a vertical double-frequency synchronization signal.

11. The method of claim 6, wherein each frame data comprises a plurality of pixel data and each pixel data corresponds to one pixel.

12. The method of claim 6 further comprising:

providing a scan voltage to the switching device via the corresponding scan line to enable the over-drive data voltage pulse and the original data voltage pulse supplied to the liquid crystal element.