IP Library Granted Patent US 6,888,608
Granted Patent B2
US 6,888,608 · App. 10/196,142 · Granted May 3, 2005

Liquid crystal display device

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Quick Facts
Patent No.
US 6,888,608
App. No.
10/196,142
Granted
May 3, 2005
Kind
B2
Abstract

A improved liquid crystal display device including two substrates each having transparent electrode thereon disposed in parallel while keeping a predetermined gap by means of pillar-shaped spacers and a liquid crystal held between said first and second substrates is proposed. In the liquid crystal display device, density or volume of the number of the pillar-shaped spacers provided in the off-display area is higher than those of a density of the number of said pillar-shaped spacers provided in the display area. This change is made continuously or stepwise along areas. The spacers are preferably disposed so that a contact area between the spacer and a rubbing cloth during the rubbing process is minimized, or so that an orientation defective area caused starting from the spacer does not extend into the pixel area, or so that a plurality of spacers are disposed along a flow of liquid crystal from filling port into the gap between the first and second substrate.

Claims (13)

1. A liquid crystal display device comprising:

first and second substrates disposed in parallel while keeping a predetermined gap; and

a liquid crystal permeating into the gap and held between said first and second substrates, said first substrate including:

a plurality of pillar-shaped resin spacers having the gap between said first and second substrates; and

a first transparent electrode for applying a voltage across said liquid crystal;

said second substrate including:

a second transparent electrode for applying the voltage across said liquid crystal,

wherein said liquid crystal display device includes an off-display area giving no display in an outer peripheral portion and a display area giving the display inwardly thereof, and

a volume of said pillar-shaped resin spacers provided in the off-display area is larger than a volume of said pillar-shaped resin spacers provided in the display area.

2. A liquid crystal display device according to claim 1 , wherein the volume of said pillar-shaped spacers provided in the off-display area becomes larger as it gets farther from the display area.

3. A liquid crystal display device according to claim 1 , wherein the off-display area is divided into a plurality of subareas in accordance with distances from the display area, and

the subarea farther from the display area among the divided subareas has a larger volume of said pillar-shaped spacers.

4. A liquid crystal display device according to claim 1 , wherein a dummy pattern is formed in a portion corresponding to said pillar-shaped spacer in the off-display area on said second substrate.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 2, 2010
From: AFPD PTE., LTD
To: AU OPTRONICS CORPORATION
Reel/Frame 024776/0183 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 28, 2010
From: KABUSHIKI KAISHA TOSHIBA
To: TOSHIBA MOBILE DISPLAY CO., LTD.
Reel/Frame 024599/0063 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 28, 2010
From: TOSHIBA MOBILE DISPLAY CO., LTD.
To: AFPD PTE., LTD.
Reel/Frame 024599/0067 →