Transflective mode liquid crystal display

• US 20050157231A1
• Filed: 12/30/2004
• Published: 07/21/2005
• Est. Priority Date: 01/16/2004
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: Innolux Display Corporation (InnoLux Corporation)
• Inventors: Yang, Chiu-Lien, Chen, Chueh-Ju
• Application Number:
  US11/026,638
• Publication Number:
  US 20050157231A1
• Time in Patent Office: Days
• US Class Current: 349/114
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]

Abstract

A transflective mode liquid crystal display (2) includes a first substrate (211) and a second substrate (210), a liquid crystal layer (230) interposed between the first substrate and the second substrate, a plurality of pixel electrodes (213) and a plurality of counter electrodes (212) formed on the first substrate, a color filter (250) disposed on an inner surface of the second substrate, and a transflective element (271) disposed on the first substrate. The color filter has a color resin layer, which comprises a transmission section and a reflection section. Brightness and color saturation of light beams emitted from the transmission section are substantially the same as those of light beams emitted from the reflection section. Therefore, the transflective mode liquid crystal display has improved color and brightness characteristics.

Claims

1. A transflective mode liquid crystal display comprising:

a first substrate and a second substrate disposed opposite each other and spaced apart a predetermined distance;

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

a plurality of pixel electrodes and a plurality of counter electrodes formed on the first substrate;

a color filter disposed on an inner surface of the second substrate, the color filter having a color resin layer, which comprises a transmission section and a reflection section; and

a transflective element disposed adjacent the first substrate;

wherein a brightness and a color saturation of light beams emitted from the transmission section are substantially the same as a brightness and a color saturation of light beams emitted from the reflection section.

2. The transflective mode liquid crystal display as claimed in claim 1, wherein the pixel electrodes and the counter electrodes are strip-shaped, zigzag shaped, or wave-shaped.

3. The transflective mode liquid crystal display as claimed in claim 2, wherein the transflective element has a transmission section and a reflection section corresponding to the transmission section and the reflection section of the color resin layer, respectively.

4. The transflective mode liquid crystal display as claimed in claim 3, wherein the transflective element is made of a dielectric material.

5. The transflective mode liquid crystal display as claimed in claim 4, wherein the reflection section of the transflective element is made of a plurality of layers of high reflectivity materials stacked one on the other, and the transmission section of the transflective element is made of a plurality of layers of high transmission materials stacked one on the other.

6. The transflective mode liquid crystal display as claimed in claim 2, wherein the reflection section of the color resin layer has a plurality of grooves, and an area of the grooves is substantially equal to an area of the color resin in the reflection section of the color resin layer.

7. The transflective mode liquid crystal display as claimed in claim 5, wherein the reflection section of the color resin layer has a plurality of grooves, and an area of the grooves is substantially equal to an area of the color resin in the reflection section of the color resin layer.

8. The transflective mode liquid crystal display as claimed in claim 2, wherein the reflection section of the color resin layer has a plurality of holes.

9. The transflective mode liquid crystal display as claimed in claim 5, wherein said reflection section of the color resin layer has a plurality of holes.

10. The transflective mode liquid crystal display as claimed in claim 9, wherein the holes are cylindrical with polygonal ends or cylindrical with circular ends.

11. The transflective mode liquid crystal display as claimed in claim 2, wherein a thickness of the color resin layer at the reflection section thereof is substantially half a thickness of the color resin layer at the transmission section thereof.

12. The transflective mode liquid crystal display as claimed in claim 5, wherein a thickness of the color resin layer at the reflection section thereof is substantially half a thickness of the color resin layer at the transmission section thereof.

13. The transflective mode liquid crystal display as claimed in claim 2, wherein a thickness of the color resin layer at the reflection section thereof is substantially equal to a thickness of the color resin layer at the transmission section thereof, and a concentration of color resin in the reflection section of the color resin layer is substantially half a concentration of color resin in the transmission section of the color resin layer.

14. The transflective mode liquid crystal display as claimed in claim 5, wherein a thickness of the color resin layer at the reflection section thereof is substantially equal to a thickness of the color resin layer at the transmission section thereof, and a concentration of color resin in the reflection section of the color resin layer is substantially half a concentration of color resin in the transmission section of the color resin layer.

15. The transflective mode liquid crystal display as claimed in claim 1, wherein an electric filed is provided to have horizontal components parallel to the first substrate.

16. A transflective mode liquid crystal display comprising:

a first substrate and a second substrate disposed opposite each other and spaced apart a predetermined distance;

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

a plurality of pixel electrodes and a plurality of counter electrodes formed on the first substrate;

a color filter disposed on an inner surface of the second substrate, the color filter having a color resin layer, which comprises a transmission area and a reflection area;

a transflective element disposed adjacent the first substrate with a transmission section and a reflection section essentially aligned with the corresponding transmission area and the reflection area, respectively; and

means for keeping a brightness and a color saturation of light beams emitted from the transmission area substantially the same as a brightness and a color saturation of light beams emitted from the reflection area.

17. A transflective mode liquid crystal display comprising:

a first substrate and a second substrate disposed opposite each other and spaced apart a predetermined distance;

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

a plurality of pixel electrodes and a plurality of counter electrodes formed on the first substrate;

a color filter disposed on an inner surface of the second substrate, the color filter having a color resin layer, which comprises a transmission area and a reflection area; and

a transflective element disposed adjacent the first substrate with a transmission section and a reflection section essentially aligned with the corresponding transmission area and the reflection area, respectively;

wherein

either the transmission area and the reflection area of the color filter or the transmission section and the reflection section of the transflective element is arranged different from each other either dimensionally or characteristically to keep a brightness and a color saturation of light beams emitted from the transmission area substantially the same as a brightness and a color saturation of light beams emitted from the reflection area.