Liquid crystal display having color filters with recess structures

• US 7,746,427 B2
• Filed: 03/01/2007
• Issued: 06/29/2010
• Est. Priority Date: 10/17/2002
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Hsu, Jui-Mei
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): NGUYEN, THANH NHAN P
• Application Number:
  US11/681,142
• Publication Number:
  US 20070146586A1
• Time in Patent Office: 1,216 Days
• Field of Search: 349/106, 349/113
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 2203/03 scattering

Abstract

A liquid crystal display includes a lower substrate, an upper substrate positioned parallel with the lower substrate, and a plurality of pixel units between the lower substrate and the upper substrate. Each pixel unit includes an upper transparent electrode, a liquid crystal layer, a lower transparent electrode, and a color filter with recess structures.

Claims

1. A liquid crystal display comprising:

a lower substrate;

an upper substrate positioned parallel with the lower substrate; and

a plurality of pixel units, each of the pixel units including an upper transparent electrode, a liquid crystal layer, a lower transparent electrode, and a color filter formed on the upper substrate and above the lower substrate;

wherein a surface of each color filter has a region with a plurality of curved convex structures, and each of the pixel units respectively comprises a reflection layer with at least one opening positioned between the color filter and the lower substrate and the region with a plurality of curved convex structures is only respectively formed on a reflection region.

2. The liquid crystal display of claim 1 wherein the color filter is covered with the upper transparent electrode directly.

3. The liquid crystal display of claim 1 wherein the surface of each color filter which has the region with a plurality of curved convex structures is able to scatter light.

4. The liquid crystal display of claim 1 wherein a distribution density of the curved convex structures is used to regulate brightness and a color deepness of the liquid crystal display.

5. The liquid crystal display of claim 1 being a reflective liquid crystal display.

6. The liquid crystal display of claim 1 being a semi-transmissive and semi-reflective liquid crystal display.

7. The liquid crystal display of claim 1 further comprising a plurality of thin film transistors for respectively controlling each of the pixel units.

8. The liquid crystal display of claim 7 wherein the thin film transistors are formed on the lower substrate and below the upper substrate.

9. The liquid crystal display of claim 1 wherein each of the curved convex structures comprises a smooth surface.

10. The liquid crystal display of claim 1 wherein each of the curved convex structures comprises a spherical surface.

11. The liquid crystal display of claim 1 wherein each of the pixel units comprises three of the color filters having the region with a plurality of the curved convex structure respectively.

12. The liquid crystal display of claim 1 wherein the curved convex structures have non-uniform sizes.