Driving Scheme for Multiple-fold Gate LCD

• US 20090322666A1
• Filed: 06/27/2008
• Published: 12/31/2009
• Est. Priority Date: 06/27/2008
• Status: Abandoned Application

• Current Assignee: Himax Technologies Ltd. (Himax Technologies Incorporated)
• Original Assignee: Himax Technologies Ltd. (Himax Technologies Incorporated)
• Inventors: Hsu, Guo-Ying
• Application Number:
  US12/147,598
• Publication Number:
  US 20090322666A1
• Time in Patent Office: Days
• US Class Current: 345/96
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2310/0281 Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
• CPC Class Codes: G09G 2320/0223 Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A driving scheme for a multiple-fold gate liquid crystal display (LCD), such as a double gate LCD, is disclosed. A forward driving sequence is provided to drive bank A and bank B of pixel electrodes in a number of rows. Subsequently, a reverse driving sequence is obtained to drive the bank A and the bank B in a number of neighboring rows.

Claims

1. A method of driving a liquid crystal display (LCD), having at least two banks of pixel electrodes in each row that are driven in turn during a horizontal scan cycle, said method comprising:

driving the at least two banks of a first row with a first driving sequence; and

driving the at least two banks of a second row with a second driving sequence different from the first driving sequence.

2. The method of claim 1, wherein said first row and the second row are located in a same frame.

3. The method of claim 1, wherein said first row and the second row are located in different frames.

4. The method of claim 1, further comprising line inversing to spatially and temporally inverse polarity of common electrode of neighboring row.

5. The method of claim 4, wherein said first row has the same polarity as the second row.

6. The method of claim 1, further comprising dot inversing to spatially and temporally inverse polarity of common electrode of neighboring pixel.

7. The method of claim 6, wherein said polarity of the common electrode changes approximately in a middle of the horizontal scan cycle.

8. A method of driving a double gate liquid crystal display (LCD), said method comprising:

providing a horizontal synchronization signal to start a horizontal scan cycle;

providing a forward driving sequence for driving bank A and bank B of pixel electrodes in a plurality of rows; and

reversing the forward driving sequence to obtain a reverse driving sequence for driving the bank A and the bank B of pixel electrodes in a plurality of neighboring rows.

9. The method of claim 8, wherein said driving sequence is reversed every two rows.

10. The method of claim 8, wherein said driving sequence is reversed every two frames.

11. The method of claim 8, wherein said rows with the forward driving sequence and the rows with the reverse driving sequence are located in a same frame.

12. The method of claim 8, wherein said rows with the forward driving sequence and the rows with the reverse driving sequence are located in different frames.

13. The method of claim 8, further comprising line inversing to spatially and temporally inverse polarity of common electrode of neighboring row.

14. The method of claim 13, wherein a first row with the forward driving sequence has the same polarity as a second row with the reverse driving sequence.

15. The method of claim 8, further comprising dot inversing to spatially and temporally inverse polarity of common electrode of neighboring pixel.

16. The method of claim 15, wherein said polarity of the common electrode changes approximately in a middle of the horizontal scan cycle.

17. Apparatus for driving a multiple-fold gate liquid crystal display (LCD), having at least two banks of pixel electrodes in each row, said apparatus comprising:

means for providing a forward driving sequence for the at least two banks;

means for altering the forward driving sequence; and

at least one gate driver for driving a plurality of rows of pixel electrodes according to the forward driving sequence and the altered driving sequence in turn.

18. The apparatus of claim 17, wherein said providing means is included in a timing controller or the gate driver.

19. The apparatus of claim 17, wherein said altering means is included in a timing controller or the gate driver.

20. The apparatus of claim 17, further comprising line inversion means for spatially and temporally inversing polarity of common electrode of neighboring row.

21. The apparatus of claim 17, further comprising dot inversion means for spatially and temporally inversing polarity of common electrode of neighboring pixel.

22. A double gate liquid crystal display (LCD), comprising:

a plurality of rows and columns of pixel electrodes arranged in matrix form, each row having two banks of pixel electrodes;

means for providing a forward driving sequence for the two banks;

means for providing a reverse driving sequence for the two banks; and

at least one gate driver for driving a plurality of rows of pixel electrodes according to the forward driving sequence and the reverse driving sequence in turn.

23. The apparatus of claim 22, wherein said plurality of rows are driven either according to the forward driving sequence or the reverse driving sequence every two rows.

24. The apparatus of claim 22, wherein said plurality of rows are driven either according to the forward driving sequence or the reverse driving sequence every two frames.