Liquid crystal display device and fabricating method thereof

• US 20030020852A1
• Filed: 07/25/2002
• Published: 01/30/2003
• Est. Priority Date: 07/25/2001
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: Chang, Youn-Gyoung, Kim, Woong-Kwon
• Granted Patent: US 9,274,390 B2
• Time in Patent Office: Days
• US Class Current: 349/110
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio

Abstract

A liquid crystal display device includes first and second substrates facing into each other, a gate line and a data line on an inner surface of the first substrate, the gate line and the data line defining a pixel region, a thin film transistor connected to the gate line and the data line, a pixel electrode connected to the thin film transistor and disposed at the pixel region, a color filter layer disposed closer than the pixel electrode from the first substrate, the color filter layer corresponding to the pixel electrode, a black matrix over the thin film transistor, a common electrode on an inner surface of the second substrate, and a liquid crystal layer interposed between the pixel electrode and the common electrode.

Claims

1. A liquid crystal display device, comprising:

first and second substrates facing into each other;

a gate line and a data line on an inner surface of the first substrate, the gate line and the data line defining a pixel region;

a thin film transistor connected to the gate line and the data line;

a pixel electrode connected to the thin film transistor and disposed at the pixel region;

a color filter layer disposed closer than the pixel electrode from the first substrate, the color filter layer corresponding to the pixel electrode;

a black matrix over the thin film transistor;

a common electrode on an inner surface of the second substrate; and

a liquid crystal layer interposed between the pixel electrode and the common electrode.

2. The device according to claim 1, wherein the color filter layer is formed under the thin film transistor.

3. The device according to claim 1, wherein the color filter layer is formed over the thin film transistor.

4. The device according to claim 1, wherein the color filter layer has three colors of red, green, and blue.

5. The device according to claim 1, wherein the black matrix is formed of an opaque conductive material.

6. The device according to claim 1, wherein the black matrix is formed of one of chromium, molybdenum, and titanium.

7. The device according to claim 5, wherein the pixel electrode directly contacts the black matrix.

8. The device according to claim 7, wherein the pixel electrode covers at least a portion of the black matrix.

9. A fabricating method of an array substrate for a liquid crystal display device, comprising:

forming a color filter layer on a substrate;

forming a gate line and a data line on the color filter layer;

forming a thin film transistor connected to the gate line and the data line;

forming a passivation layer over the thin film transistor, the gate line, and the data line;

forming a black matrix on the passivation layer over the thin film transistor; and

forming a pixel electrode on the passivation layer, the pixel electrode being connected to the thin film transistor.

10. The method according to claim 9, wherein the black matrix is formed of an opaque conductive material.

11. The method according to claim 9, wherein the black matrix is formed of one of chromium, molybdenum, and titanium.

12. The method according to claim 10, wherein the pixel electrode directly contacts the black matrix.

13. The method according to claim 12, wherein the pixel electrode covers at least a portion of the black matrix.

14. A fabricating method of an array substrate for a liquid crystal display device, comprising:

forming a gate line and a data line on a substrate, the gate line and the data line crossing each other;

forming a thin film transistor connected to the gate line and the data line;

forming a color filter layer over the thin film transistor, the gate line, and the data line;

forming a black matrix on the color filter layer over the thin film transistor; and

forming a pixel electrode on the color filter layer, the pixel electrode being connected to the thin film transistor.

15. The method according to claim 14, wherein the black matrix is formed of an opaque conductive material.

16. The method according to claim 14, wherein the black matrix is formed of one of chromium, molybdenum, and titanium.

17. The method according to claim 15, wherein the pixel electrode directly contacts the black matrix.

18. The method according to claim 17, wherein the pixel electrode covers at least a portion of the black matrix.