LIQUID CRYSTAL DISPLAY PANEL AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME

• US 20090115923A1
• Filed: 10/27/2008
• Published: 05/07/2009
• Est. Priority Date: 11/01/2007
• Status: Active Grant

• Current Assignee: Kyoritsu Optronics Co., Ltd. (Taiflex Scientific Co., Ltd.), Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: KANG, Hen-Ta, WANG, I-Fang
• Granted Patent: US 8,264,439 B2
• Time in Patent Office: Days
• US Class Current: 349/37
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/13624 having more than one switching element per pixel
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 2300/0447 for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
• CPC Class Codes: G09G 2300/0876 Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
• CPC Class Codes: G09G 2320/028 by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
• 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 LCD panel includes a data line, first and second scan lines, first and second pixels and an auxiliary electrode. The first pixel has a first pixel electrode, first and second switches. The first switch has an input terminal coupled to the data line, a control terminal coupled to the first scan line and an output terminal coupled to the first pixel electrode. The second switch has an input terminal coupled to the data line and a control terminal coupled to the first scan line. The second pixel has a second pixel electrode and a third switch. The third switch has an input terminal coupled to the data line, a control terminal coupled to the second scan line and an output terminal coupled to the second pixel electrode. The auxiliary electrode coupled to an output terminal of the second switch is adjacent to the second pixel electrode.

Claims

1. A liquid crystal display (LCOD) panel comprising:

a data line;

a first scan line and a second scan line;

a first pixel having;

a first pixel electrode;

a first switch having a first input terminal, a first control terminal and a first output terminal, wherein the first input terminal is coupled to the data line, the first control terminal is coupled to the first scan line and the first output terminal is coupled to the first pixel electrode; and

a second switch having a second input terminal, a second control terminal and a second output terminal, wherein the second input terminal is coupled to the data line, the second control terminal is coupled to the first scan line;

a second pixel having

a second pixel electrode; and

a third switch having a third input terminal, a third control terminal and a third output terminal, wherein the third input terminal is coupled to the data line, the third control terminal is coupled to the second scan line and the third output terminal is coupled to the second pixel electrode; and

an auxiliary electrode coupled to the second output terminal of the second switch and adjacent to the second pixel electrode.

2. The LCD panel according to claim 1, wherein the first pixel electrode and the second electrode receive different polarity voltages to have different polarities, so that the second pixel produces a plurality of display domains.

3. The LCD panel according to claim 1, wherein the second input terminal of the second switch is coupled to the data line via the first switch.

4. The LCD panel according to claim 1, wherein the first input terminal of the first switch is coupled to the data line via the second switch.

5. The LCD panel according to claim 1, wherein the second input terminal of the second switch is directly coupled to the data line.

6. The LCD panel according to claim 1, wherein the second pixel further has a fourth switch, the fourth switch has a fourth input terminal, a fourth control terminal and a fourth output terminal, the fourth input terminal is coupled to the data line, and the fourth control terminal is coupled to the second scan line.

7. The LCD panel according to claim 6, wherein the first, second, third and fourth switches are thin film transistors.

8. A LCD panel comprising:

a scan line;

a first data line and a second data line;

a first pixel having

a first pixel electrode;

a first switch having a first input terminal, a first control terminal and a first output terminal, wherein the first input terminal is coupled to the first data line, the first control terminal is coupled to the scan line and the first output terminal is coupled to the first pixel electrode; and

a second switch having a second input terminal, a second control terminal and a second output terminal, wherein the second input terminal is coupled to the first data line, the second control terminal is coupled to the scan line;

a second pixel having

a second pixel electrode; and

a third switch having a third input terminal, a third control terminal and a third output terminal, wherein the third input terminal is coupled to the second data line, the third control terminal is coupled to the scan line and the third output terminal is coupled to the second pixel electrode; and

an auxiliary electrode coupled to the second output terminal of the second switch and adjacent to the second pixel electrode.

9. The LCD panel according to claim 8, wherein the first pixel electrode and the second electrode receive different polarity voltages to have different polarities, so that the second pixel produces a plurality of display domains.

10. The LCD panel according to claim 8, wherein the second input terminal of the second switch is coupled to the first data line via the first switch.

11. The LCD panel according to claim 8, wherein the first input terminal of the first switch is coupled to the first data line via the second switch.

12. The LCD panel according to claim 8, wherein the second pixel further has a fourth switch, the fourth switch has a fourth input terminal, a fourth control terminal and a fourth output terminal, the fourth input terminal is coupled to the second data line, and the fourth control terminal is coupled to the scan line.

13. The LCD panel according to claim 12, wherein the first, second, third and fourth switches are thin film transistors.

14. A LCD device comprising:

a data driver;

a scan driver; and

a LCD panel having

a data line coupled to the data driver;

a first scan line and a second scan line both coupled to the scan driver;

a first pixel having

a first pixel electrode;

a first switch having a first input terminal, a first control terminal and a first output terminal, wherein the first input terminal is coupled to the data line, the first control terminal is coupled to the first scan line and the first output terminal is coupled to the first pixel electrode; and

a second switch having a second input terminal, a second control terminal and a second output terminal, wherein the second input terminal is coupled to the data line, the second control terminal is coupled to the first scan line;

a second pixel having

a second pixel electrode; and

a third switch having a third input terminal, a third control terminal and a third output terminal, wherein the third input terminal is coupled to the data line, the third control terminal is coupled to the second scan line and the third output terminal is coupled to the second pixel electrode; and

an auxiliary electrode coupled to the second output terminal of the second switch and adjacent to the second pixel electrode.

15. The LCD device according to claim 14, wherein the first pixel electrode and the second electrode receive different polarity voltages to have different polarities, so that the second pixel produces a plurality of display domains.

16. The LCD device according to claim 14, wherein the second input terminal of the second switch is coupled to the data line via the first switch.

17. The LCD device according to claim 14, wherein the first input terminal of the first switch is coupled to the data line via the second switch.

18. The LCD device according to claim 14, wherein the second pixel further has a fourth switch, the fourth switch has a fourth input terminal, a fourth control terminal and a fourth output terminal, the fourth input terminal is coupled to the data line, and the fourth control terminal is coupled to the second scan line.

19. The LCD device according to claim 18, wherein the first, second, third and fourth switches are thin film transistors.

20. A LCD device comprising:

a data driver;

a scan driver; and

a LCD panel having

a scan line coupled to the scan driver;

a first data line and a second data line both coupled to the data driver;

a first pixel having

a first pixel electrode;

a first switch having a first input terminal, a first control terminal and a first output terminal, wherein the first input terminal is coupled to the first data line, the first control terminal is coupled to the scan line and the first output terminal is coupled to the first pixel electrode; and

a second switch having a second input terminal, a second control terminal and a second output terminal, wherein the second input terminal is coupled to the first data line, the second control terminal is coupled to the scan line;

a second pixel having

a second pixel electrode; and

a third switch having a third input terminal, a third control terminal and a third output terminal, wherein the third input terminal is coupled to the second data line, the third control terminal is coupled to the scan line and the third output terminal is coupled to the second pixel electrode; and

an auxiliary electrode coupled to the second output terminal of the second switch and adjacent to the second pixel electrode.

21. The LCD device according to claim 20, wherein the first pixel electrode and the second electrode receive different polarity voltages to have different polarities, so that the second pixel produces a plurality of display domains.

22. The LCD device according to claim 20, wherein the second input terminal of the second switch is coupled to the first data line via the first switch.

23. The LCD device according to claim 20, wherein the first input terminal of the first switch is coupled to the first data line via the second switch.

24. The LCD device according to claim 20, wherein the second pixel further has a fourth switch, the fourth switch has a fourth input terminal, a fourth control terminal and a fourth output terminal, the fourth input terminal is coupled to the second data line, and the fourth control terminal is coupled to the scan line.

25. The LCD device according to claim 24, wherein the first, second, third and fourth switches are thin film transistors.