Liquid crystal display device and method of fabricating the same

• US 20070165174A1
• Filed: 12/28/2006
• 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, Yuichi, Mornoi
• Granted Patent: US 7,667,809 B2
• Time in Patent Office: Days
• US Class Current: 349/141
• CPC Class Codes: G02F 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement

Abstract

A liquid crystal display device and method of fabricating the device where the device can control a viewing angle in all directions without forming a white pixel. The liquid crystal display device includes a display control region that is controlled such that liquid crystal molecules are inclined and a viewing-angle control region that is controlled such that liquid crystal molecules are aligned in a horizontal or vertical direction, where a control voltage is supplied through a viewing angle control line independent of a common line for the display control region.

Claims

1. A liquid crystal display device comprising:

a display control region that is controlled such that liquid crystal molecules are inclined; and

a viewing-angle control region that is controlled such that liquid crystal molecules are aligned in a horizontal or vertical direction, wherein a control voltage is supplied through a viewing angle control line that is independent of a common line for the display control region.

2. The device according to claim 1, wherein a substrate opposite to the viewing-angle control region is free of a coloring layer for a color filter.

3. The device according to claim 1, wherein the liquid crystal molecules comprise n-type liquid crystal molecules.

4. The device according to claim 1 further comprising:

common electrodes on the display control region and the viewing-angle control region, the common electrodes having a plate shape; and

a pixel electrode including first pixel holes having a chevron shape “

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”

in the display control region, and second pixel holes having a linear shape in the viewing-angle control region.

5. The device according to claim 4, wherein the pixel electrode in the display control region is independent of the pixel electrode in the viewing-angle control region.

6. The device according to claim 4, wherein the first pixel holes are arranged at a predetermined interval in a horizontal or vertical direction, and the second pixel holes are arranged at a predetermined interval in a direction different from that of the first pixel holes.

7. The device according to claim 1 further comprising:

common electrodes on the display control region and the viewing-angle control region, the common electrodes having a plate shape; and

a pixel electrode including first pixel holes having a circle or ellipse shape in the display control region, and at least one of second and third pixel holes having a linear shape in the viewing-angle control region.

8. The device according to claim 7, wherein the pixel electrode in the display control region is independent of the pixel electrode in the viewing-angle control region.

9. The device according to claim 7, wherein the second pixel holes are arranged at a predetermined interval in a horizontal or vertical direction, and the third pixel holes are arranged at a predetermined interval in a direction different from that of the second pixel holes.

10. A method for fabricating of a liquid crystal display device including liquid crystal display molecules, the method comprising:

forming a gate electrode, a gate pad and a data pad on a substrate;

forming a gate insulation layer and forming a source and drain electrode on the gate electrode;

forming a first passivation layer and a photoacrylic layer on an entire surface of the substrate, and forming a contact hole therein;

forming a common electrode for a display control region where liquid crystal molecules are inclined, and forming a common electrode for a viewing-angle control region where liquid crystal molecules are inclined in horizontal and vertical directions;

forming a second passivation layer on the entire surface of the substrate, and forming a contact hole therein; and

forming a pixel electrode in the display control region, and forming a viewing-angle control electrode in the viewing-angle control region corresponding to each display control region, to incline the liquid crystal molecules in vertical and horizontal directions.

11. The method according to claim 10, wherein the liquid crystal molecules comprise n-type liquid crystal molecules.

12. The method according to claim 10, wherein the common electrodes comprise a plate shaped structure on the display control region and the viewing-angle control region, and the pixel electrode includes first pixel holes having a shape of “

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”

in the display control region, and second pixel holes having a line shape in the viewing-angle control region.

13. The method according to claim 12, wherein the pixel electrode of the display control region is formed independently of the pixel electrode of the viewing-angle control region.

14. The method according to claim 12, wherein the first pixel holes are arranged at a predetermined interval in a vertical or horizontal direction, and the second pixel holes are arranged at a predetermined interval in a direction different from that of the first pixel holes.

15. The method according to claim 10, wherein the common electrode is formed in a plate shape on the display control region and the viewing-angle control region, and the pixel electrode includes first pixel holes having a circle or ellipse shape in the display control region, and at least any one of second and third pixel holes, each having a line shape, in the viewing-angle control region.

16. The method according to claim 15, wherein the pixel electrode of the display control region is formed independently of the pixel electrode of the viewing-angle control region.

17. The method according to claim 15, wherein the second pixel holes are arranged at a predetermined interval in a horizontal or vertical direction, and the third pixel holes are arranged at a predetermined interval in a direction different from that of the second pixel holes.

18. A method for fabricating of a liquid crystal display device including liquid crystal molecules, the method comprising:

forming a display control region that is controlled such that liquid crystal molecules are inclined; and

forming a viewing-angle control region that is controlled such that liquid crystal molecules are aligned in a horizontal or vertical direction, wherein a control voltage is supplied through a viewing angle control line formed independently of a common line for the display control region.

19. The method according to claim 18, wherein a substrate opposite to the viewing-angle control region is provided that is free of a coloring layer for a color filter.

20. The method according to claim 18, wherein the liquid crystal molecules comprise n-type liquid crystal molecules.

21. The method according to claim 18 further comprising:

forming a common electrode on the display control region and the viewing-angle control region, the common electrode comprising a plate shaped structure; and

forming a pixel electrode including first pixel holes having a chevron shape “

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”

in the display control region, and second pixel holes having a linear shape in the viewing-angle control region.

22. The method according to claim 21, wherein the pixel electrode in the display control region is formed independently of the pixel electrode in the viewing-angle control region.

23. The method according to claim 21, wherein the first pixel holes are arranged at a predetermined interval in a horizontal or vertical direction, and the second pixel holes are arranged at a predetermined interval in a direction different from that of the first pixel hole.

24. The method according to claim 18 further comprising:

forming a common electrode in the display control region and the viewing-angle control region, the common electrode comprising a plate shaped structure; and

forming a pixel electrode including first pixel holes having a circle or ellipse shape in the display control region, and at least one of second and third pixel holes having a linear shape in the viewing-angle control region.

25. The method according to claim 24, wherein the pixel electrode in the display control region is formed independently of the pixel electrode in the viewing-angle control region.

26. The method according to claim 24, wherein the second pixel holes are arranged at a predetermined interval in a horizontal or vertical direction, and the third pixel holes are arranged at a predetermined interval in a direction different from that of the second pixel holes.