Color filter substrate and liquid crystal display apparatus having the same

• US 20050024560A1
• Filed: 03/09/2004
• Published: 02/03/2005
• Est. Priority Date: 07/31/2003
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yang, Yong-Ho, Lee, Dong-Ho
• Granted Patent: US 7,206,042 B2
• Time in Patent Office: Days
• US Class Current: 349/114
• CPC Class Codes: G02F 1/133357 Planarisation layers
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133555 Transflectors

Abstract

The LCD apparatus having a color filter substrate including a first area and a second area adjacent to the first area. The color filter substrate includes a plurality of color pixels having different colors with respect to each other. The color pixels have an element formed thereon to partially expose the substrate. A transmission electrode is formed on the color filter and on the substrate exposed through the element. At least two color pixels of the color pixels have different sizes from each other. Thus, the LCD apparatus has improved display properties.

Claims

1. A reflection-transmission LCD, comprising:

an element formed in a color filter layer to substantially minimize differences in the color reproducibility between the reflective mode operation and the transmission mode operation.

2. The reflection-transmission LCD of claim 1, wherein the element comprises a hole formed in a color filter layer.

3. The reflection-transmission LCD of claim 2, further comprising:

a red (R), green (G), and blue (B) color filter formed in the color filter layer;

a first hole formed in the red (R) color filter;

a second hole formed in the green (G) color filter; and

a third hole formed in the blue (B) color filter.

4. The reflection-transmission LCD of claim 3, wherein the second hole bigger than the first hole.

5. The reflection-transmission LCD of claim 4, wherein the third hole is smaller than the second hole.

6. The reflection-transmission LCD of claim 3, wherein the each of the red (R), green (G), and blue (B) color filter is divided into a first area and a second area arranged adjacent to each other and the first area does not contain the hole.

7. The reflection-transmission LCD of claim 6, wherein the second area of the red (R) color filter comprises two holes.

8. The reflection-transmission LCD of claim 7, wherein the second area of the green (G) color filter comprises two holes.

9. The reflection-transmission LCD of claim 7, wherein the second area corresponding to the blue (B) color filter comprises one hole.

10. The reflection-transmission LCD of claim 9, wherein the first area is a transmission area and the second area is a reflection area.

11. A reflection-transmission LCD, comprising:

a first substrate and a second substrate arranged opposite the first substrate;

a red (R), green (G), and blue (B) color filter layer formed on the first substrate;

a planarization layer formed on the first substrate; and

a hole formed in the color filter layer to substantially minimize differences in color reproducibility between reflective mode operation and transmission mode operation.

12. The reflection-transmission LCD of claim 11, wherein the planarization layer comprises a first insulating layer formed on the color filter layer and covers the at least one hole.

13. The reflection-transmission LCD of claim 12, wherein the planarization layer further comprises a second insulating layer formed on the first insulating layer for substantially planarizing step differences due to the hole formed in the color filter layer.

14. The reflection-transmission LCD of claim 13, further comprising:

a common electrode formed on the second insulating layer;

liquid crystal material arranged between the first substrate and second substrate;

a gate insulating layer formed on the second substrate; and

a third insulating layer formed on the gate insulating layer.

15. The reflection-transmission LCD of claim 14, wherein the third insulating layer is patterned into reflection portions and transmission portions.

16. The reflection-transmission LCD of claim 15, further comprising:

a transmission electrode formed on the transmission portions; and

a reflection electrode formed on the reflection portion, wherein the non-patterned portions comprise a substantially concavo-convex shape.