In plane switching mode liquid crystal display device

Abstract

Disclosed is an IPS mode LCD device, which comprises first and second substrates, N gate lines arranged on the first substrate substantially in parallel, M data lines arranged to cross the gate lines so as to define m×n pixel regions, a plurality of first switching devices formed at each crossing of the gate lines and the data lines, first electrodes electrically connected with the first switching devices, second electrodes generating a horizontal electric field along with the first electrodes in the pixel regions, a common voltage supplier generating a common voltage from an n-1th gate line and an nth gate line and supplying the generated common voltage to the second electrodes, and a liquid crystal layer formed between the first and second substrates.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

In the drawings:

FIG. 1 is a plan view illustrating a thin film transistor array substrate in a general IPS mode LCD device;

FIG. 2 is a circuit diagram illustrating an equivalent circuit of FIG. 1;

FIG. 3 is a circuit diagram illustrating an equivalent circuit of an IPS mode LCD device according to an embodiment of the present invention;

FIG. 4 is a circuit diagram illustrating an enlarged unit pixel of an IPS mode LCD device according to an embodiment of the present invention; and

FIG. 5 is an exemplary view illustrating waveforms of voltages displayed in an LCD device according to the present invention.

Claims

1. An IPS mode LCD device comprising: first and second substrates;N gate lines arranged on the first substrate substantially in parallel;M data lines arranged to cross the gate lines so as to define mxn pixel regions;a plurality of first switching devices formed at each crossing of the gate lines and the data lines;first electrodes electrically connected to the first switching devices;second electrodes generating a horizontal electric field along with the first electrodes in the pixel regions;a common voltage supplier generating a common voltage from an n-1th gate line and an nth gate line and supplying the generated common voltage to the second electrodes; anda liquid crystal layer formed between the first and second substrates.

2. The IPS mode LCD device as claimed in claim 1, wherein the common voltage supplier includes at least two resistors connected in series to the n-1th gate line and the nth gate line.

3. The IPS mode LCD device as claimed in claim 2, wherein the two resistors are formed during at least one of forming the gate lines, forming the data lines, and forming the first electrodes.

4. The IPS mode LCD device as claimed in claim 2, wherein the two resistors include at least one of a metal and a transparent conductive material.

5. The IPS mode LCD device as claimed in claim 1, wherein the first electrodes are pixel electrodes, and the second electrodes are common electrodes.

6. The IPS mode LCD device as claimed in claim 1, wherein each of the first switching devices includes a first source electrode connected to the data lines, a first gate electrode connected to the gate lines, and a first drain electrode connected to the first electrodes.

7. The IPS mode LCD device as claimed in claim 1, wherein the first switching devices are thin film transistors.

8. The IPS mode LCD device as claimed in claim 1, further comprising second switching devices supplying the common voltage generated from the common voltage supplier to the second electrodes in accordance with scan signals supplied from the gate lines.

9. The IPS mode LCD device as claimed in claim 8, wherein each of the second switching devices includes a second source electrode connected to an output terminal of the common voltage supplier, a second gate electrode connected to the gate lines, and a second drain electrode connected to the second electrodes.

10. The IPS mode LCD device as claimed in claim 8, wherein the second switching devices are thin film transistors.

11. The IPS mode LCD device as claimed in claim 1, wherein the first and second electrodes are formed of a transparent conductive material.