Liquid crystal display device

• US 20070165173A1
• Filed: 12/27/2006
• Published: 07/19/2007
• Est. Priority Date: 12/28/2005
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kazuyoshi, Nagayama, Momoi, Yuichi
• Granted Patent: US 7,656,488 B2
• Time in Patent Office: Days
• US Class Current: 349/141
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/133769 comprising an active, e.g. switchable, alignment layer
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned

Abstract

An LCD device includes liquid crystal molecules of n-type liquid crystal, and a viewing-angle control pixel controlling n-type liquid crystal in a pixel. The liquid crystal molecules are inclined in vertical and horizontal directions. The liquid crystal display device may control a viewing angle in vertical and horizontal directions without forming a white sub-pixel.

Claims

1. A liquid crystal display device, comprising:

a liquid crystal molecules of n-type liquid crystal; and

a viewing-angle control pixel controlling the n-type liquid crystal in a pixel to have the liquid crystal molecules inclined in vertical and horizontal directions.

2. The device of claim 1, further comprising a substrate opposite to the viewing-angle control pixel wherein no coloring layer is formed on the substrate.

3. The device of claim 1, wherein the pixel includes RGB pixels.

4. The device of claim 3, wherein each of the RGB-pixels comprises:

a pixel electrode including a plurality of pixel holes having one of circular shape and elliptical shape; and

a common electrode exposed through the pixel holes.

5. The device of claim 1, wherein the viewing-angle control pixel comprises a first common electrode arranged in a horizontal direction and a second common electrode arranged in a vertical direction.

6. The device of claim 5, wherein the viewing-angle control pixel further comprises a pixel electrode having a pixel hole which exposes the first and the second common electrodes in the horizontal and vertical directions.

7. A liquid crystal display device, comprising:

a plurality of RGB pixels having liquid crystal molecules which change an alignment in response to application of a voltage and displaying information based on the changed alignment;

a plurality of control pixels operable to change the display of the information upon application of the voltage.

8. The device of claim 7, wherein the control pixels comprise liquid crystal molecules which change the alignment upon application of the voltage.

9. The device of claim 7, wherein the display of the information is identical in a front viewing angle, a vertical viewing angle, a horizontal viewing angle and an inclined viewing angle upon application of no voltage.

10. The device of claim 7, wherein a horizontal view of the control pixels is different from a vertical view of the control pixels upon application of the voltage.

11. The device of claim 7, wherein each of the control pixels comprises a first common electrode arranged in a horizontal direction and a second common electrode arranged in a vertical direction.

12. The device of claim 11, wherein the control pixels are arranged to be overlapped with of the RGB pixels and the display of the information is different in the horizontal direction and in the vertical direction upon application of the voltage.

13. The device of claim 8, wherein the display of the information is viewable from a predetermined direction in a first mode and the display of the information is unviewable from the direction in a second mode wherein no voltage is applied to the control pixels in the first mode and voltage is applied to the control pixels in the second mode.

14. A method for fabricating of a liquid crystal display device, comprising:

forming liquid crystal molecules of n-type liquid crystal; and

forming a viewing-angle control pixel controlling the n-type liquid crystal in a pixel; and

,

arranging the liquid crystal molecules to be inclined in vertical and horizontal directions.

15. The method of claim 14, further comprising forming a substrate opposite to the viewing-angle control pixel wherein no coloring layer is formed on the substrate.

16. The method of claim 14, further comprising forming the pixel to include RGB pixels.

17. The method of claim 16, wherein forming the pixel further comprises:

forming a pixel electrode having a plurality of pixel holes; and

forming a common electrode exposed through the pixel holes.

18. The method of claim 17, wherein the forming the pixel electrode comprises forming the pixel holes to have one of circular shape and elliptical shape.

19. The method of claim 14, wherein forming the viewing-angle control pixel comprises forming a first common electrode in a horizontal direction and a second common electrode in a vertical direction.

20. The method of claim 19, further comprises forming a pixel electrode having a pixel hole which exposes the first and the second common electrodes in the horizontal and vertical directions.