Liquid crystal display panel capable of minimizing a defect rate caused by bright point and repairing method thereof

• US 7,612,861 B2
• Filed: 08/17/2005
• Issued: 11/03/2009
• Est. Priority Date: 06/13/2005
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Nam, Seung Hee, Kwon, Oh Nam
• Primary Examiner(s): QI, ZHI QIANG
• Application Number:
  US11/205,983
• Publication Number:
  US 20060279681A1
• Time in Patent Office: 1,539 Days
• Field of Search: 349/158, 349/54, 349/122
• US Class Current: 349/158
• CPC Class Codes: G02F 1/1309 Repairing; Testing

Abstract

A liquid crystal display penel includes a substrate, a hole disposed in the substrate, and an opaque substance filling in the hole. The hole is configured to be located in an area corresponding to a bright point. The liquid crystal display penel may minimize a defect ratio and improve a yield by darkening the bright point.

Claims

1. A liquid crystal display panel including an upper substrate and a lower substrate, comprising:

a hole disposed in one of the upper substrate and the lower substrate, the hole configured to be located in an area corresponding to a bright point;

an opaque substance partially filling in a lower part of the hole; and

a transparent substance filling in an upper part of the hole, wherein the transparent substance includes a transparent pigment and is formed on the opaque substance.

2. The liquid crystal display panel according to claim 1, further comprising a black matrix and a color filter on the upper substrate.

3. The liquid crystal display panel according to claim 2, wherein the opaque substance includes a colored metal substance.

4. The liquid crystal display panel according to claim 3, wherein the colored metal substance is the same substance as the black matrix.

5. The liquid crystal display panel according to claim 1, wherein the opaque substance includes a colored pigment.

6. The liquid crystal display penel according to claim 5, wherein the colored pigment includes a substance realizing the same color as the color filter.

7. The liquid crystal display panel according to claim 5, wherein the colored pigment includes the same substance as the color filter.

8. The liquid crystal display panel according to claim 5, wherein the colored pigment comprises a substance realizing one of black color and gray color.

9. The liquid crystal display panel according to claim 1, wherein the hole has a diameter of 20 μ

m to 500 μ

m.

10. A method for repairing a liquid crystal display panel having a an upper substrate and a lower substrate, comprising:

sensing an area corresponding to a bright point;

forming a hole in one of the upper substrate and the lower substrate, the hole configured to be located in the area corresponding to the bright point;

partially filling an opaque substance in a lower part of the hole; and

filling a transparent substance in an upper part of the hole, wherein the transparent substance includes a transparent pigment and is formed on the opaque substance.

11. The method according to claim 10, wherein forming the hole comprises forming the hole with at least one of a micro drill, a micro milling, or a laser.

12. The method according to claim 11, wherein forming the hole comprises supplying a light having a wavelength of about 50 nm to 300 nm with the laser.

13. The method according to claim 10, wherein the partially filling the opaque substance in the lower part of the hole comprises:

filling in an entire hole with the opaque substance; and

partially removing the opaque substance with an etchant.

14. The method according to claim 10, wherein filling in the hole comprises forming the opaque substance with the same substance as one of a black matrix and a color filter.

15. The method according to claim 14, wherein filling in the hole comprises forming the opaque substance with a substance realizing the same color as the color filter.

16. The method according to claim 10, wherein filling in the hole comprises forming the opaque substance with one of a colored pigment and a colored metal substance.

17. The method according to claim 16, wherein forming the opaque substance comprises performing one of a vacuum deposition, a spraying process and a sputtering.