Structure for encapsulating a liquid crystal display device

• US 7,884,914 B2
• Filed: 11/08/2005
• Issued: 02/08/2011
• Est. Priority Date: 02/18/2004
• Status: Active Grant

• Current Assignee: AUO Corp.
• Original Assignee: AU Optronics Corporation
• Inventors: Ho, Tzu-Wei, Lo, Chang-Cheng, Chen, Kun-Hong
• Primary Examiner(s): Shosho; Callie E
• Assistant Examiner(s): KOKKINOS, NICHOLAS C
• Application Number:
  US11/268,843
• Publication Number:
  US 20060057334A1
• Time in Patent Office: 1,918 Days
• Field of Search: 428/1.53, 428/1.6, 428/1.62, 428/138, 428/139, 428/122, 428/131, 428/137, 428/1.1, 428/1.5, 428637-640, 428/194, 349/153, 349/154, 349/190, 277/312, 277/305, 277/341, 277/345, 277/269, 277/904, 277/316, 277/596, 277/605, 277/641, 383/38, D23/269
• US Class Current: 349/153
• CPC Class Codes: C09K 2323/06 Substrate layer characterised by chemical composition
• CPC Class Codes: C09K 2323/061 Inorganic, e.g. ceramic, metallic or glass
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8723 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: Y10S 277/904 Viscous seal
• CPC Class Codes: Y10T 156/1082 Partial cutting bonded sandwich [e.g., grooving or incising]
• CPC Class Codes: Y10T 428/24331 including nonapertured component
• CPC Class Codes: Y10T 428/24339 Keyed

Abstract

A structure for encapsulating a liquid crystal display device is disclosed. Openings are formed in a second material layer on a first substrate, exposing an underlying first material layer. The openings are substantially distributed over the perimeter of the first substrate. A sealant is placed in the openings, forming a sealant region for attachment of a second substrate to the first substrate. The sealant region is substantially perpendicular to a direction of length of the openings. In addition, the sealant contacts the first material layer and the second material layer through the openings.

Claims

1. An encapsulating structure for a liquid crystal display device, comprising:

a first substrate having a sealant region;

a second substrate;

a first material layer disposed on the first substrate;

a second material layer disposed on the first material layer, wherein the second material layer includes an opening with a continuous saw tooth pattern extending along the sealant region to expose the underlying first material layer; and

a sealant disposed on the second material layer in the sealant region and filled into the opening of the second material layer for attaching the second substrate to the first substrate;

wherein the sealant is adapted to contact the first material layer and the second material layer through the opening, and the sealant has substantially flat contact bottom surfaces with the first and the second material layers via the opening with the continuous saw tooth pattern extending along the sealant region.

2. The structure as claimed in claim 1, wherein the opening has a uniform width.

3. The structure as claimed in claim 1, wherein the first material layer comprises an organic polymer material.

4. The structure as claimed in claim 1, wherein the second material layer comprises a dielectric material.

5. The structure as claimed in claim 1, wherein the saw tooth pattern includes a curve saw tooth pattern.