Liquid crystal display and method for manufacturing the same

• US 8,174,665 B2
• Filed: 03/28/2011
• Issued: 05/08/2012
• Est. Priority Date: 09/28/2007
• Status: Expired due to Fees

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Bong Chul, Seo, Hyeon Jin, Kwon, Dhang, Cho, Hang Sup, Kim, Ho Su
• Primary Examiner(s): WONG, ERIC K
• Application Number:
  US13/073,567
• Publication Number:
  US 20110171766A1
• Time in Patent Office: 407 Days
• Field of Search: 349/155, 349/187
• US Class Current: 349/155
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/13392 spacers dispersed on the cell substrate, e.g. spherical particles, microfibres

Abstract

Disclosed is a liquid crystal display (LCD) device and a method for manufacturing the same, capable of maintaining a cell gap and preventing press defects caused by application of a predetermined external pressure via the use of ball spacers.

Claims

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

preparing a first substrate and a second substrate;

forming a plurality of gate lines and a plurality of data lines in respective non-pixel regions on the first substrate such that the gate lines and the data lines cross each other to define pixel regions;

forming a plurality of thin film transistors at respective crossings between the gate lines and the data lines;

forming a black matrix layer on the second substrate in portions corresponding to the non-pixel regions;

ink-jetting a spacer-forming material in predetermined portions provided on the black matrix layer between the first and second substrates to form spacers, wherein the spacer-forming material comprises at least one first ball having a first diameter, at least one second ball having a second diameter smaller than the first diameter, a liquid thermosetting binder and a solvent and wherein the ratio between the first and second balls is in the range of about 1;

2 to 1;

100; and

forming a liquid crystal layer between the first substrate and the second substrate, and joining the first substrate to the second substrate.

2. The method according to claim 1, wherein the first diameter of the first balls is about 2.0 to about 5.0 μ

m and the difference between the first diameter and the second diameter is about 0.05 to about 1.0 μ

m.

3. The method according to claim 1, wherein the spacer-forming material comprises a liquid material consisting of the liquid thermosetting binder and the solvent, and about 0.1 to about 3.0 wt % of the first and second balls, with respect to the total weight of the liquid material,

wherein the liquid thermosetting binder is present in an amount of about 1.0 to about 20.0 wt %, based on about 100 wt % of the total weight of the liquid material.

4. The method according to claim 3, further comprising:

after formation of the spacers, heating the spacers to cure the liquid thermosetting binder and vaporize the solvent.

5. The method according to claim 4, wherein the heating process is carried out at about 80 to about 300°

C.