Liquid crystal display panel having dummy color filter and fabricating method thereof

• US 7,633,595 B2
• Filed: 12/23/2004
• Issued: 12/15/2009
• Est. Priority Date: 12/30/2003
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Park, Seung-Ryul, Kim, Woong-Kwon
• Primary Examiner(s): SCHECHTER, ANDREW M
• Application Number:
  US11/019,625
• Publication Number:
  US 20050140892A1
• Time in Patent Office: 1,818 Days
• Field of Search: 349155-157
• US Class Current: 349/156
• 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 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 1/1393 the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells G02F1/1396, G02F1/141 take precedence

Abstract

A liquid crystal display includes a gate line disposed on a substrate; a data line disposed on the substrate, a pixel area being defined by an intersection of the gate line and the data line; a thin film transistor locating at the intersection of the gate line and the data line; a color filter disposed at each pixel area on the substrate; a spacer formed on a first base surface of the thin film transistor area; a rib formed on a second base surface of the pixel area; and a dummy pattern disposed at the thin film transistor area to form a stepped difference of the first base surface and the second base surface.

Claims

1. A liquid crystal display panel, comprising:

a gate line disposed on a substrate;

a data line disposed on the substrate, a pixel area being defined by an intersection of the gate line and the data line;

a thin film transistor located at the intersection of the gate line and the data line;

a first color filter disposed on the substrate in a pixel area;

a light shielding layer formed on the thin film transistor so that the height of an upper surface of the light shielding layer is the same as that of an upper surface of the first color filter;

a dummy color filter formed on the light shielding layer;

a spacer formed on the dummy color filter; and

a rib formed on the first color filter.

2. The liquid crystal display panel according to claim 1, wherein a color of the dummy color filter is different from that of the first color filter.

3. The liquid crystal display panel according to claim 1, further comprising an organic protective film formed between the spacer and the dummy color filter and the rib and the first color filter.

4. The liquid crystal display panel according to claim 1, wherein the spacer is formed of a material identical to that of the rib.

5. A fabricating method of a liquid crystal display panel, comprising the steps of:

forming a thin film transistor on a substrate;

disposing a first protective film to protect the thin film transistor;

forming a light shielding layer on the first protective film, wherein the light shielding layer overlaps the thin film transistor;

forming a first color filter on the first protective film in a pixel area so that the height of an upper surface of the first color filter is the same as that of an upper surface of the light shielding layer;

a dummy color filter on the light shielding layer;

forming a pixel electrode connected to the thin film transistor; and

forming a spacer on the dummy color filter and a rib on the first color filter by using a same mask, wherein the rib controls the arrangement direction of a liquid crystal material.

6. The fabricating method according to claim 5, further comprising the step of disposing a second protective film to cover the dummy color filter and the first color filter.

7. The fabricating method according to claim 5, wherein the dummy color filter includes a color filter material of any one of red, green and blue color.

8. The fabricating method according to claim 5, wherein the dummy color filter includes the color filter material having a color different from a material of the first color filter.