Liquid crystal display device

• US 20060145983A1
• Filed: 06/09/2005
• Published: 07/06/2006
• Est. Priority Date: 12/31/2004
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, Dong-Hoon, Ryu, Ho-Jin
• Granted Patent: US 8,866,713 B2
• Time in Patent Office: Days
• US Class Current: 345/92
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0434 Flat panel display in which a field is applied parallel to the display plane
• CPC Class Codes: G09G 2320/0209 Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• 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
• 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 liquid crystal display (LCD) device capable of reducing the driving power and preventing cross talk is provided. The LCD device comprises: a plurality of data lines arranged on a substrate in a vertical direction for transmitting image data; a plurality of gate lines arranged on the substrate in a horizontal direction for transmitting a scan signal; a plurality of pixels formed at each intersection between the gate lines and the data lines and arranged on the substrate in a matrix formation; a first electrode and a second electrode respectively provided at each pixel for forming a horizontal electric field; and a plurality of first common voltage lines and second common voltage lines alternately arranged on the substrate in a horizontal direction, wherein the second electrodes provided at each pixel of a line unit are alternately connected to the first common voltage line and the second common voltage line.

Claims

1. A liquid crystal display (LCD) device comprising:

a plurality of data lines arranged on a substrate in a first direction;

a plurality of gate lines arranged on the substrate in a second direction;

a plurality of pixels formed at each intersection between the gate lines and the data lines and arranged on the substrate in a matrix configuration;

a first electrode and a second electrode respectively provided at each pixel for forming a horizontal electric field there between; and

a plurality of first common voltage lines and a plurality of second common voltage lines alternately arranged on the substrate in the second direction, wherein the second electrodes provided at each pixel in a line unit are alternately connected to the first common voltage line and the second common voltage line.

2. The LCD device of claim 1, wherein the first electrode is a pixel electrode and the second electrode is a common electrode.

3. The LCD device of claim 1, wherein the first common voltage lines are electrically connected to each other and the second common voltage lines are electrically connected to each other.

4. The LCD device of claim 1, wherein the first direction is perpendicular to the second direction.

5. The LCD device of claim 1, wherein the first common voltage lines and the second common voltage lines are formed on the substrate substantially in a horizontal direction.

6. The LCD device of claim 1, wherein a first common voltage having a pulse shape transmitted during each frame is applied to the first common voltage line, and a second common voltage having a pulse shape that is an inversion of the first common voltage is applied to the second common voltage line.

7. The LCD device of claim 1, wherein the second electrodes of the odd numbered pixels in a line unit are connected to the first common voltage lines, and the second electrodes of the even numbered pixels in the line unit are connected to the second common voltage lines.

8. The LCD device of claim 1, wherein the second electrodes of the even numbered pixels in a line unit are connected to the first common voltage lines, and the second electrodes of the odd numbered pixels in the line unit are connected to the second common voltage lines.

9. A liquid crystal display (LCD) device comprising:

a plurality of data lines arranged on a substrate in a first direction for transmitting image data;

a plurality of gate lines arranged on the substrate in a second direction to cross the data lines;

a plurality of pixels formed at each intersection between the gate lines and the data lines and arranged on the substrate in a matrix configuration;

a first electrode and a second electrode respectively provided at each pixel for forming a horizontal electric field there between; and

a plurality of first common voltage lines and a plurality of second common voltage lines alternately arranged on the substrate in a first direction, wherein the second electrodes provided at pixels in a column unit are alternately connected to the first common voltage line and the second common voltage line.

10. The LCD device of claim 9, wherein the plurality of first common voltage lines are electrically connected to each other, and the plurality of second common voltage lines are electrically connected to each other.

11. The LCD device of claim 9, wherein the second electrodes of the odd numbered pixels in a column unit are connected to the first common voltage lines, and the second electrodes of the even numbered pixels in the column unit are connected to the second common voltage lines.

12. The LCD device of claim 9, wherein the second electrodes of the even numbered pixels in a column unit are connected to the first common voltage lines, and the second electrodes of the odd numbered pixels in the column unit are connected to the second common voltage lines.

13. The LCD device of claim 11, wherein the second electrodes of the odd numbered pixels and the second electrodes of the even numbered pixels are electrically connected to each other by a conductive material.

14. The LCD device of claim 13, wherein the conductive material is indium-tin-oxide (ITO).