Optically clear resin composition and display device including the same

• US 10,446,788 B2
• Filed: 07/16/2015
• Issued: 10/15/2019
• Est. Priority Date: 12/16/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: You, Jong Sung, Cho, Yong Youl
• Primary Examiner(s): Strah, Eli D.
• Application Number:
  US14/801,013
• Publication Number:
  US 20160168432A1
• Time in Patent Office: 1,552 Days
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 2457/202 LCD, i.e. liquid crystal displays
• CPC Class Codes: B32B 2457/204 Plasma displays
• CPC Class Codes: B32B 2457/206 Organic displays, e.g. OLED
• CPC Class Codes: B32B 2457/208 Touch screens
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B32B 7/14 applied in spaced arrangements, e.g. in stripes
• CPC Class Codes: C08G 18/8175 with esters of acrylic or alkylacrylic acid having only one group containing active hydrogen
• CPC Class Codes: C09J 107/00 Adhesives based on natural rubber
• CPC Class Codes: C09J 109/00 Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
• CPC Class Codes: C09J 133/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C09J 175/14 Polyurethanes having carbon-to-carbon unsaturated bonds
• CPC Class Codes: C09J 2203/318 for the production of liquid crystal displays
• CPC Class Codes: C09J 4/00 Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
• CPC Class Codes: C09J 5/06 involving heating of the applied adhesive
• CPC Class Codes: C09K 2323/03 Viewing layer characterised by chemical composition
• CPC Class Codes: C09K 2323/031 Polarizer or dye
• CPC Class Codes: C09K 2323/05 Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
• CPC Class Codes: H10K 2101/00 Properties of the organic materials covered by group H10K85/00
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/858 : comprising refractive means, e.g. lenses
• CPC Class Codes: H10K 50/868 : Arrangements for polarized light emission H10K50/86 takes precedence
• CPC Class Codes: H10K 59/8722 : Peripheral sealing arrangements, e.g. adhesives, sealants

Abstract

An optically transparent adhesive resin composition includes an ester polymer which contains an ester bond within a repeating unit, a (meth)acrylic ester polymer which contains a (meth)acrylic ester bond within the repeating unit, a rubber polymer, and a crystalline polymer.

Claims

1. A display device, comprising:

a cover window comprising a transparent area and an opaque area disposed outside the transparent area;

a display panel comprising a display area and a peripheral area disposed outside the display area;

a polarizing plate interposed between the display panel and the cover window; and

an optically transparent adhesive resin film comprising a crystalline polymer and a rubber polymer, the optically transparent adhesive resin film being configured to cover the polarizing plate and the display panel, and the optically transparent adhesive resin film has a shear strength greater than or equal to 65 N/cm² at 85°

C.,

wherein;

the crystalline polymer comprises polycaprolactone or polycarbonate-diol;

the rubber polymer comprises at least one of polybutadiene, polyisoprene, polyneoprene, polyisobutylene, cellulose acetate, or polyvinyl acetate; and

a weight ratio of the rubber polymer and the crystalline polymer is in the range of 1;

0.5 to 1;

1.2.

2. The display device of claim 1, wherein the optically transparent adhesive resin film has a glass transition temperature (Tg) in the range of 4°

C. to 10°

C.

3. The display device of claim 2, wherein the optically transparent adhesive resin film has a shear strength greater than or equal to 300 N/cm² at 25°

C.