FFS mode liquid crystal display device with viewing angle control region and display control region and method of fabricating the same

• US 8,144,298 B2
• Filed: 03/23/2011
• Issued: 03/27/2012
• 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
• Primary Examiner(s): Nguyen, Hoan C
• Application Number:
  US13/070,246
• Publication Number:
  US 20110183574A1
• Time in Patent Office: 370 Days
• Field of Search: 349 42- 43, 349123-129, 349141-144, 257/59, 257/72, 345/92
• US Class Current: 349/144
• 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 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;

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 configured separately from a common line for the display control region;

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

forming a first pixel electrode for the display control region and a second pixel electrode for the viewing-angle control region on a same substrate, wherein voltages are applied to the first pixel electrode for the display control region and the second pixel electrode for the viewing-angle control region independently.

2. The method according to claim 1, wherein free of color layer is on a substrate opposite to the viewing-angle control region.

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

4. The method according to claim 1, wherein the first pixel electrode for the display control region includes first pixel holes having a chevron shape “

<

”

, and the second pixel electrode for the viewing-angle control region includes second pixel holes having a linear shape.

5. The method 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 hole.