Array substrate for IPS mode liquid crystal display device

• US 6,879,353 B2
• Filed: 12/26/2001
• Issued: 04/12/2005
• Est. Priority Date: 12/29/2000
• Status: Expired due to Term

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Moon, Hong-Man, Lee, Deok-Won
• Primary Examiner(s): Thomas, Tom
• Assistant Examiner(s): Landau, Matthew C
• Application Number:
  US10/025,862
• Publication Number:
  US 20020085136A1
• Time in Patent Office: 1,203 Days
• Field of Search: 349/40, 349/139, 349/149
• US Class Current: 349/40
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/136204 Arrangements to prevent high voltage or static electricity failures

Abstract

The present invention provides an array substrate for an IPS-LCD device. The array substrate has an image display area and an image non-display area. A plurality of pixels are disposed in the display area. A plurality of switching devices each of that is disposed in each pixel are on the substrate. First and second lines apply signals to each switching device, and a plurality of first electrodes on the substrate are connected to each switching device. A plurality of second electrodes on the substrate are spaced apart from each first electrode. A plurality of electrostatic discharge devices are arranged in the non-display area, and each electrostatic discharge device is at a distance of more than one pixel pitch. A plurality of pads are arranged in the non-display area. A plurality of first connecting lines each of that connects each pixel to each electrostatic discharge device are arranged in the non-display area. A plurality of second connecting lines connect the electrostatic discharge devices to the pads.

Claims

1. An in-plane switching liquid crystal display device, comprising:

a substrate having a display region and a non-display region;

a plurality of pixels in the display region;

a plurality of first and second electrodes on the substrate such that an electric field is formed between the first and second electrodes substantially parallel to the substrate when a voltage is applied to the first and second electrodes;

a plurality of electrostatic discharge devices in the non-display region, wherein each electrostatic discharge device is at a distance of more than one pixel pitch from the pixels;

a plurality of first connecting lines in the non-display region, each first connecting line connecting a pixel to one of the electrostatic discharge devices,

a plurality of second connecting lines in the non-display region; and

a plurality of pads in the non-display region,

wherein one electrostatic discharge device is located between one of the first connecting lines and one of the second connecting lines,

wherein each pad is between about 1 to about 2.5 millimeters from each electrostatic discharge device.

2. The device of claim 1, further comprising a plurality of switching devices on the substrate.

3. The device of claim 2, wherein each switching device is disposed in each pixel.

4. The device of claim 2, wherein the switching device includes a thin film transistor.

5. The device of claim 1, further comprising first and second lines on the substrate.

6. The device of claim 5, wherein the first and second lines apply signals to each switching device.

7. The device of claim 6, wherein the first line includes a gate line.

8. The device of claim 6, wherein the second line includes a data line.

9. The device of claim 1, wherein the first electrodes include a pixel electrode.

10. The device of claim 1, wherein the second electrodes includes a common electrode.

11. The device of claim 1, wherein one pixel pitch is between about 1 mm to about 1.5 mm.

12. The device of claim 1, wherein each second connecting line connects each electrostatic discharge device to each pad.

13. The device of claim 1, wherein a voltage of the first connecting lines is different from a voltage of the electrostatic discharge devices.

14. The device of claim 1, wherein each first connecting line receives signal voltage of inverted phase.

15. The device of claim 1, further comprising an auxiliary line in the non-display region.

16. The device of claim 15, wherein the auxiliary line connects each of the electrostatic discharge devices.

17. The device of claim 15, wherein the auxiliary line receives a signal applied to the second electrode.