Liquid crystal display device, substrate bonding apparatus, and method for fabricating liquid crystal display device using the same

• US 7,483,114 B2
• Filed: 10/19/2004
• Issued: 01/27/2009
• Est. Priority Date: 10/20/2003
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Park, Young Suk, Chung, Hyun Sang, Lee, Hyun Kyu
• Primary Examiner(s): Nguyen; Dung
• Assistant Examiner(s): DUONG, TAI V
• Application Number:
  US10/967,263
• Publication Number:
  US 20050083478A1
• Time in Patent Office: 1,561 Days
• Field of Search: 349/42, 349/110, 349/155, 349/156, 349/157, 349/187, 349/188, 349/190
• US Class Current: 349/187
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/13415 Drop filling process

Abstract

A liquid crystal display device includes a plurality of guide walls formed at regular intervals on a first substrate, the guide walls extending lengthwise or widthwise within an active region of the first substrate, a liquid crystal material filled between the guide walls, and a second substrate being attached to the first substrate sandwiching the liquid crystal material therebetween.

Claims

1. A method for fabricating a liquid crystal display device, comprising:

providing first, and second substrates having a plurality of pixel regions;

forming guide walls on the second substrate between the pixel regions;

preheating of the liquid crystal material;

dispensing the preheated liquid crystal material on the second substrate having the guide walls formed thereon, wherein the liquid crystals are filled between the guide walls in a shape convex upward due to a surface tension of the liquid crystal material when a cohesive force of the liquid crystal molecules is greater than an adhesive force between the guide walls and the liquid crystal molecules; and

bonding the first and second substrates to each other at an atmospheric pressure, wherein the convex portion of the liquid crystal material is close contact with the first substrate, thereby preventing formation of bubbles in the liquid crystal material.

2. The method of claim 1, wherein the step of forming the guide walls includes coating and patterning an acryl group material.

3. The method of claim 1, wherein the second substrate is a thin film transistor substrate having gate lines and data lines formed thereon, and the guide walls are formed overlapping at least one of the gate lines and the data lines.

4. The method of claim 1, wherein the second substrates is a color filter substrate having a black matrix layer formed on regions except the pixel regions, and the guide walls are formed in a vertical or horizontal direction overlapping a portion of the black matrix layer.