Liquid crystal display having color filters with recess structures

• US 7,212,259 B2
• Filed: 09/30/2003
• Issued: 05/01/2007
• Est. Priority Date: 10/17/2002
• Status: Expired due to Fees

• Current Assignee: InnoLux Corporation
• Original Assignee: Chi Mei Optoelectronics (InnoLux Corporation)
• Inventors: Hsu, Jui-Mei
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): NGUYEN, THANH NHAN P
• Application Number:
  US10/605,416
• Publication Number:
  US 20040105050A1
• Time in Patent Office: 1,309 Days
• Field of Search: 349/106, 349/113, 349/114
• 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 plurality of curved convex structures, and the upper transparent electrode directly contacts and covers the curved convex structures on the surface of each of the color filters.

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

3. 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.

4. The liquid crystal display of claim 1 wherein each of the pixel units respectively comprises a reflection layer positioned between the color filter and the lower substrate.

5. The liquid crystal display of claim 4 being a reflective liquid crystal display.

6. The liquid crystal display of claim 4 wherein each of the reflection layers includes an opening.

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

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

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

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

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

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

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