Liquid crystal display and method for manufacturing the same

• US 8,730,436 B2
• Filed: 04/25/2012
• Issued: 05/20/2014
• Est. Priority Date: 10/05/2007
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Cho, Jun Beom, Seo, Hyeon Jin, Lee, Jeong Hoon, Kwon, Dhang, Cho, Hang Sup, Kim, Ho Su
• Primary Examiner(s): KIANNI, KAVEH C
• Application Number:
  US13/455,816
• Publication Number:
  US 20120206686A1
• Time in Patent Office: 755 Days
• Field of Search: 349/155, 349/156
• US Class Current: 349/122
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/13392 spacers dispersed on the cell substrate, e.g. spherical particles, microfibres
• 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 2201/50 Protective arrangements
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

Disclosed herein are a liquid crystal display (LCD) device and a method for manufacturing the same, capable of preventing problems (i.e., movement of balls, damage to the surfaces that face spacers upon application of predetermined pressure, and variation in cell gap) associated with the use of the ball spacers. The liquid crystal display device includes a first substrate and a second substrate facing each other, a spacer formed on the first substrate, wherein the spacer includes a plurality of balls and a solid to aggregate the balls together and adhere the balls to the first substrate, a hard coating layer formed on the second substrate facing the spacer, and a liquid crystal layer filled between the first substrate and the second substrate.

Claims

1. A liquid crystal display device comprising:

a first substrate and a second substrate facing each other;

a gate line and a data line disposed on the first substrate such that the gate line and the data line intersect each other to define a pixel region;

a thin film transistor disposed at an intersection between the gate line and the data line;

a black matrix layer disposed on the second substrate in a portions corresponding to the gate line and the data line;

a color filter layer disposed on the second substrate including the black matrix layer;

a spacer formed in a predetermined portion provided within a width of the black matrix layer, wherein the spacer comprises a plurality of balls, and a solid to aggregate the balls together and adhere the balls to the first substrate;

a hard coating layer disposed on the second substrate facing the spacer, wherein the hard coating layer has substantially hardness equivalent to that of the balls; and

a liquid crystal layer filled between the first substrate and the second substrate.

2. The liquid crystal display device according to claim 1, further comprising:

an overcoat layer disposed on the color filter layer,

wherein the hard coating layer is disposed on the overcoat layer.

3. The liquid crystal display device according to claim 1, wherein the solid includes at least one material selected from the group consisting of acrylic-based, urethane-based and epoxy-based organic compounds, and silicone compounds.

4. The liquid crystal display device according to claim 1, wherein the spacer is formed by heating a spacer-forming material, comprising a liquid material consisting of about 2 to about 20 wt % of a liquid thermosetting binder in an uncured state of the solid and a solvent, and about 0.1 to about 3.0 wt % of the balls, with respect to the total weight of the liquid material, to volatilize the solvent and cure the liquid thermosetting binder.