IP Library Granted Patent US 7,580,092
Granted Patent B2
US 7,580,092 · App. 11/476,805 · Granted Aug 25, 2009

Liquid crystal display device and method for fabricating the same

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Quick Facts
Patent No.
US 7,580,092
App. No.
11/476,805
Granted
Aug 25, 2009
Kind
B2
Abstract

A color filter substrate includes a transparent substrate, a black matrix arranged on the transparent substrate in horizontal and vertical directions along boundaries of pixel regions, the black matrix including a reflection layer on a surface thereof, and a color filter formed on the black matrix.

Claims (30)

1. A liquid crystal display device, comprising:

a first substrate and a second substrate;

gate lines and data line perpendicularly disposed from each other on the first substrate to define a plurality of pixel regions;

a switching device formed at each pixel region

a black matrix formed on the second substrate, the black matrix including a reflection layer on a surface thereof;

a color filter formed on the black matrix; end

a liquid crystal layer formed between the first substrate and the second substrate;

a reflective polarizer at an outside surface of the first substrate; and

a backlight at the outside of the first substrate to supply light to the liquid crystal layer,

wherein the light supplied to the liquid crystal layer from the backlight is reflected from the reflection layer of the black matrix and then re-reflected from the reflective polarizer to the pixel regions.

2. The liquid crystal display device of claim 1 , wherein the reflection layer is on a side of the black matrix facing the first substrate.

3. The liquid crystal display device of claim 1 , wherein the reflection layer is on a side of the black matrix that is linear.

4. The liquid crystal display device of claim 1 , wherein the black matrix has a triangular rib shape.

5. The liquid crystal display device of claim 4 , wherein the reflection layer is on sides of the triangular rib shape of the black matrix facing the first substrate.

6. The liquid crystal display device of claim 1 , further comprising: pixel electrodes formed in pixel regions defined by crossing the gate lines and data lines on the first substrate; and

a common electrode formed on an entire surface of the color filter of the second substrate.

7. The liquid crystal display device of claim 1 , further comprising common electrodes and a pixel electrodes in pixel regions defined by crossing the gate lines and data lines on the first substrate.

8. A method for fabricating an liquid crystal display device, comprising:

providing a first substrate having a thin film transistor array with pixel regions;

providing a second substrate on which a black matrix and a color filter are formed, the black matrix arranged on the second substrate in horizontal and vertical directions along boundaries of the pixel regions, and includes a reflection layer on a surface thereof facing the second substrate;

forming a liquid crystal layer between the first substrate and the second substrate;

providing a reflective polarizer at an outside surface of the first substrate; and

providing a backlight at the outside of the first substrate to supply light to the liquid crystal layer,

wherein the light supplied to the liquid crystal layer from the backlight is reflected from the reflection layer of the black matrix and then re-reflected from the reflective polarizer to the pixel regions.

9. The method of claim 8 , wherein the providing the second substrate includes:

providing a transparent substrate;

forming an organic pattern having a triangular structure on the transparent substrate;

forming a reflection layer on a surface of the organic pattern; and

forming a color filter layer on the transparent substrate.

10. The method of claim 9 , further comprising forming a common electrode on the color filter layer.

Assignments (2)
CHANGE OF NAME Recorded Oct 27, 2008
From: LG.PHILIPS LCD CO., LTD.
To: LG DISPLAY CO., LTD.
Reel/Frame 021772/0701 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 29, 2006
From: HEO, SEUNG-HO
To: LG. PHILIPS LCD CO., LTD.
Reel/Frame 018050/0737 →