Liquid crystal display device and method for driving the same

• US 20070268229A1
• Filed: 12/20/2006
• Published: 11/22/2007
• Est. Priority Date: 05/22/2006
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Eui Tae, Kang, Byung Koo
• Granted Patent: US 8,686,932 B2
• Time in Patent Office: Days
• US Class Current: 345/100
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2310/0205 Simultaneous scanning of several lines in flat panels
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A liquid crystal display (LCD) device includes: a plurality of gate lines; a plurality of data lines that cross the gate lines to define pixel regions; a plurality of thin film transistors at the crossings of the gate and data lines, the thin film transistors of vertically adjacent pixels each connected to a shared gate line of the plurality of gate lines and on opposite sides of the shared gate line; and a plurality of pixel electrodes in the pixel regions, wherein each pixel electrode of the plurality of pixel electrodes is formed in two horizontally-adjacent pixel regions.

Claims

1. A liquid crystal display device, comprising:

a plurality of gate lines;

a plurality of data lines that cross the gate lines to define pixel regions;

a plurality of thin film transistors at the crossings of the gate and data lines, the thin film transistors of vertically adjacent pixels each connected to a shared gate line of the plurality of gate lines and on opposite sides of the shared gate line; and

a plurality of pixel electrodes in the pixel regions, wherein each pixel electrode of the plurality of pixel electrodes is formed in two horizontally-adjacent pixel regions.

2. The liquid crystal display device according to claim 1, wherein vertically-adjacent pixel electrodes on opposite sides of a gate line are simultaneously driven using the corresponding gate line.

3. The liquid crystal display device according to claim 1, wherein each pixel electrode comprises:

two sub-pixel electrodes in two horizontally-adjacent pixel regions; and

a connecting electrode between the two sub-pixel electrodes to electrically connect the two sub-pixel electrodes.

4. The liquid crystal display device according to claim 3, wherein the connecting electrode has a width smaller than that of each sub-pixel electrode.

5. The liquid crystal display device according to claim 3, wherein the connecting electrode is overlapped with a data line.

6. The liquid crystal display device according to claim 1, further comprising:

a backlight unit that irradiates light of different colors in sub-frames, respectively.

7. The liquid crystal display device according to claim 1, wherein the thin film transistors of two vertically-adjacent pixels are connected to different data lines.

8. The liquid crystal display device according to claim 1, wherein two pixel electrodes are vertically arranged between the adjacent two gate lines.

9. A liquid crystal display device, comprising:

a plurality of first and second gate lines;

a plurality of first to fourth data lines crossing the first and second gate lines to define pixel regions;

a plurality of pixels, wherein each pixel includes four horizontally-adjacent pixel regions; and

a plurality of thin film transistors (TFTs) at the crossings of the first gate lines and the first and second data lines and at the crossings of the second gate lines and the third and fourth data lines.

10. The liquid crystal display device according to claim 9, wherein the plurality of thin film transistors are arranged at opposite sides of the first gate lines and the second gate lines in zigzags.

11. The liquid crystal display device according to claim 9, wherein the plurality of pixels include,

a plurality of first pixels that receive a data signal from the first data lines in accordance with the scan pulse from the first gate lines;

a plurality of second pixels that receive a data signal from the second data lines in accordance with the scan pulse from the first gate lines;

a plurality of third pixels that receive a data signal from the third data lines in accordance with the scan pulse from the second gate lines; and

a plurality of fourth pixels that receive a data signal from the fourth data lines in accordance with the scan pulse from the second gate lines.

12. The liquid crystal display device according to claim 11, wherein the first and second pixels are vertically adjacent to each other at opposite sides of the first gate lines.

13. The liquid crystal display device according to claim 11, wherein the third and fourth pixels are vertically adjacent to each other at opposite sides of the second gate lines.

14. The liquid crystal display device according to claim 11, wherein a scan pulse is simultaneously supplied to a pair of the first and second gate lines.

15. The liquid crystal display device according to claim 9, wherein two pixels are vertically arranged between two adjacent gate lines.

16. The liquid crystal display device according to claim 9, wherein vertically-adjacent pixels at opposite sides of a pair of the first and second gate lines simultaneously are driven using the corresponding first and second gate lines.

17. The liquid crystal display device according to claim 9, further comprising:

a plurality of pixel electrodes in each pixel of the plurality of pixels, each connecting to a thin film transistor of the plurality of thin film transistors, wherein each pixel electrode comprises;

four sub-pixel electrodes in the horizontally-adjacent four pixel regions; and

connecting electrodes between the four sub-pixel electrodes to electrically connect the four sub-pixel electrodes.

18. The liquid crystal display device according to claim 17, wherein each connecting electrode has a width smaller than that of each sub-pixel electrode.

19. The liquid crystal display device according to claim 17, wherein each connecting electrode is overlapped with one of the first to fourth data lines.

20. The liquid crystal display device according to claim 9, further comprising:

a backlight unit that irradiates light of a different color in each respective sub-frame of a frame.

21. A method for driving a liquid crystal display device including a plurality of gate lines, a plurality of data lines crossing the gate lines to define pixel regions, and a plurality of pixel electrodes in the pixel regions, wherein one pixel electrode is formed in two horizontally-adjacent pixel regions, the liquid crystal display device driven in a plurality of sub-frames divided from one frame, comprising:

supplying a scan pulse to a gate line;

supplying data signals to pixels arranged to be vertically adjacent to each other at opposite sides of the gate line to charge the pixels with the data signals; and

irradiating light onto the pixels charged with the data signals.

22. A method for driving a liquid crystal display device including a plurality of first and second gate lines, a plurality of first to fourth data lines crossing the first and second gate lines to define pixel regions, and a plurality of pixels in the pixel regions, wherein one pixel is formed in horizontally-adjacent four pixel regions, comprising the steps of:

supplying a scan pulse to a pair of the first and second gate lines;

supplying data signals to pixels arranged to be vertically adjacent to each other at opposite sides of the pair of the first and second gate lines to charge the pixels with the data signals; and

irradiating light onto the pixels charged with the data signals.