IP Library Granted Patent US 7,193,678
Granted Patent B2
US 7,193,678 · App. 10/948,758 · Granted Mar 20, 2007

Liquid crystal display device and method for manufacturing the same

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Quick Facts
Patent No.
US 7,193,678
App. No.
10/948,758
Granted
Mar 20, 2007
Kind
B2
Abstract

A liquid crystal display device includes an array substrate having a plurality of first seal frames each forming a panel area to become a display portion and a second seal frame containing these seal frames thereinside and being of a completely closed shape as a whole outside these first seal frames. The liquid crystal display device of the invention has a structure in which the whole inside of the second seal frame including the insides of the first seal frames of the array substrate is filled with liquid crystal by a liquid crystal dripping method and thereafter the color filter substrate is stuck on the array substrate. This display makes it possible to manufacture a liquid crystal display device of an aggregate liquid crystal display panel structure improved in uniformity of gap between both substrates.

Claims (41)

1. A liquid crystal display device comprising:

a first substrate, said first substrate being provided with a first seal frame completely closed and a second seal frame completely closed, said second seal frame containing said first seal frame thereinside;

a second substrate arranged opposite to said array substrate; and

a liquid crystal layer interposed between said first substrate and said second substrate,

wherein the whole area inside said second seal frame including an area between said first seal frame and said second seal frame is filled with liquid crystal to form said liquid crystal layer, and said first substrate and said second substrate are joined-through said first seal frame and said second seal frame.

2. A liquid crystal display device according to claim 1 , further comprising a plurality of said first seal frames.

3. A liquid crystal display device according to claim 1 , wherein said liquid crystal of said liquid crystal layer is filled by a liquid crystal dripping method.

4. A liquid crystal display device according to claim 1 , wherein a material for said first seal frame and said second seal frame comprises an ultraviolet-setting and thermosetting epoxy-based adhesive agent.

5. A liquid crystal display device according to claim 1 , wherein an oriented film for said liquid crystal is formed on each of the surfaces of said first substrate and said second substrate, said surfaces being opposite to each other.

6. A method for manufacturing a liquid crystal display device, comprising:

forming a first seal frame to form a panel area and forming a second seal frame spaced apart from and containing said first seal frame thereinside and having a completely closed shape outside said first seal frame on a first substrate covered with an oriented film;

dripping liquid crystal on the whole inside of said second seal frame including the inside of said first seal frame and a space between said first seal frame and said second seal frame;

joining said first substrate and a second substrate through said first seal frame and said second seal frame in a vacuum atmosphere; and

releasing said vacuum atmosphere and hardening said first seal frame and said second seal frame.

7. A method for manufacturing a liquid crystal display device according to claim 6 , wherein said first seal frame is at least one in number.

8. A method for manufacturing a liquid crystal display device according to claim 6 , wherein a material for said first seal frame and said second seal frame comprises an ultraviolet-setting and thermosetting epoxy-based adhesive agent.

9. A method for manufacturing a liquid crystal display device according to claim 6 , wherein a spacer material is scattered and stuck on said second substrate.

10. A method for manufacturing a liquid crystal display device according to claim 6 , wherein the number of said first seal frames is plural and said method further comprises, after properly hardening said first seal frame and said second seal frame:

cutting out both said first and second substrates joined together into individual panel areas; and

washing the liquid crystal remaining around said panel areas obtained by cutting.

11. A method for manufacturing a liquid crystal display device, comprising:

forming an oriented film on each of the surfaces of a first substrate and a second substrate;

rubbing the respective surfaces of said oriented films of both said substrates;

forming plural first seal frames and a second seal frame containing said first seal frames on said first substrate;

dripping and filling liquid crystal in the whole inside of said second seal frame including the insides of said first seal frames;

scattering and sticking a spacer material on said second substrate;

forming an aggregate liquid crystal display panel structure composed of plural panels partitioned by said first seal frames by joining said first substrate and said second substrate through said first seal frames and said second seal frame in a vacuum atmosphere;

hardening said first seal frames and said second seal frame in an atmospheric pressure;

cutting and separating said aggregate liquid crystal display panel structure into individual liquid crystal display panels; and

washing out said liquid crystal remaining around said separated liquid crystal display panels, wherein said first seal frames and said second seal frame each are of a completely closed shape.

12. A method for manufacturing a liquid crystal display device, comprising:

forming a first seal frame to form a panel area and a second seal frame containing said first seal frame thereinside and having a completely closed shape outside said first seal frame on a first substrate covered with an oriented film;

dripping liquid crystal on the whole inside of said second seal frame including the inside of said first seal frame;

joining said first substrate and a second substrate through said first seal frame and said second seal frame in a vacuum atmosphere;

releasing said vacuum atmosphere and hardening said first seal frame and said second seal frame;

cutting out both said substrates joined together into individual panel areas; and

washing the liquid crystal remaining around said panel areas obtained by cuffing, wherein the number of said first seal frames is plural.

13. A liquid crystal display device according to claim 1 , wherein the first substrate comprises an array substrate.

14. A liquid crystal display device according to claim 1 , wherein the second substrate comprises a color filter substrate.

15. A liquid crystal display device according to claim 1 , wherein a gap is formed between the first seal frame and the second seal frame.

16. A liquid crystal display device according to claim 1 , wherein a spacing between the first substrate and the second substrate is substantially uniform.

Assignments (5)
SECURITY INTEREST Recorded Jul 14, 2022
From: VISTA PEAK VENTURES, LLC
To: GETNER FOUNDATION LLC
Reel/Frame 060654/0430 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 28, 2018
From: GETNER FOUNDATION LLC
To: VISTA PEAK VENTURES, LLC
Reel/Frame 045469/0023 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 10, 2011
From: NEC CORPORATION
To: GETNER FOUNDATION LLC
Reel/Frame 026254/0381 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 7, 2010
From: NEC LCD TECHNOLOGIES, LTD.
To: NEC CORPORATION
Reel/Frame 024492/0176 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 7, 2005
From: UEYAMA, HIROSHI
To: NEC LCD TECHNOLOGIES, LTD.
Reel/Frame 016142/0075 →