Transflective color liquid crystal display and method for fabricating a substrate therefor

• US 20030090610A1
• Filed: 10/28/2002
• Published: 05/15/2003
• Est. Priority Date: 10/31/2001
• Status: Active Grant

• Current Assignee: Optrex Corporation (Kyocera Corporation)
• Original Assignee: Optrex Corporation (Kyocera Corporation)
• Inventors: Mori, Haruki, Takasaki, Ichiro, Ozeki, Masao
• Granted Patent: US 7,158,198 B2
• Time in Patent Office: Days
• US Class Current: 349/113
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133555 Transflectors

Abstract

A transparent resist 13 having a certain thickness is provided on a full reflection film 11a at light reflection portions 11, and light reflection portions 12 are formed as holes having a certain depth, when one of the substrates 10 has an inner surface provided with the light reflection portions 11 made of the full reflection film 11a and the light transmission portions 12 formed as openings without the full reflection layer, and a color filter 14 is provided on each paired light reflection portion 11 and light transmission portion 12.

Claims

1. A transflective color liquid crystal display, wherein one of transparent substrates has an inner surface formed with light reflection portions made of a full reflection layer and light transmission portions formed as openings without the full reflection layer, and wherein a color filter is provided on each paired light reflection portion and light transmission portion, the full reflection layer having a transparent resist provided thereon so as to have a thickness, and the light transmission portions being formed as holes having a depth, whereby the color filters have a greater thickness at the light transmission portions than at the light reflection portions.

2. The liquid crystal display according to claim 1, wherein the color filters have a 1.2 to 4.5 times greater thickness at the light transmission portions than at the light reflection portions.

3. The liquid crystal display according to claim 1, wherein the color filters have 2.2 to 4.5 times greater thickness at the light transmission portions than at the light reflection portions.

4. The liquid crystal display according to claim 1, wherein TN liquid crystal layer is arranged.

5. The liquid crystal display according to claim 1, wherein STN liquid crystal layer is arranged.

6. The liquid crystal display according to claim 1, wherein said color filter is used for R, G and B colors.

7. The liquid crystal display according to claim 1, wherein R, G and B color filters for a pixel is arranged for a row electrode line.

8. The liquid crystal display according to claim 1, wherein said color filter has a rectangle in a substrate plane.

9. The liquid crystal display according to claim 8, wherein a shorter side of a light transmission portion of said rectangle is equal to or less than 50 μ

m.

10. The liquid crystal display according to claim 1, wherein Ag is used for said reflection layer.

11. A method for fabricating a substrate for a transflective color liquid crystal display, comprising providing one of substrates with light reflection portions made of a full reflection layer and light transmission portions formed as openings without the full reflection layer, and providing a color filter on each paired light reflection portion and light transmission portion,

the method further comprising providing a transparent resist made of a photosensitive resin only at the light reflection portions by a lithographic technique and baking the transparent resin before provision of the color filter on each paired light reflection portion and light transmission portion.