Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical laminate and flexible display comprising same

An optical laminate, flexible display technology, applied in optics, optical components, nonlinear optics, etc., can solve the problems of reduced bending resistance, flexible display difficulties, etc., to achieve suppression of bubbles, excellent followability, and excellent bending resistance. sexual effect

Active Publication Date: 2019-12-24
DONGWOO FINE CHEM CO LTD
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when such a pressure-sensitive adhesive is used to attach a cover window on which a decorative layer is formed to a lower optical layer such as a polarizing plate or a touch sensor, bending resistance decreases under high-temperature and high-humidity conditions, and thus, the The pressure-sensitive adhesive is difficult to apply to flexible displays

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical laminate and flexible display comprising same
  • Optical laminate and flexible display comprising same
  • Optical laminate and flexible display comprising same

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0108] Preparation Example 1: Preparation of Hard Coating Film

[0109] Preparation of photocurable epoxy resin

[0110] 3-Glycidoxypropyltrimethoxysilane and water were mixed at a ratio of 23.63 g:2.70 g (0.1 mol:0.15 mol), and then introduced into a 100 mL two-necked flask. Then, 0.05 mL of ammonia as a catalyst was added to the mixture, followed by stirring at 60° C. for 6 hours to prepare a photocurable epoxy resin.

[0111] Preparation of Hard Coat Composition

[0112] A photocurable epoxy resin and diglycidyl ether were mixed in a weight ratio of 100:10, and then, based on 100 parts by weight of the mixture, 2 parts by weight of triarylsulfonium hexafluoroantimonate was mixed therewith to prepare a hard coat layer composition.

[0113] Preparation of hard coat film

[0114] The hard coat composition was coated in a thickness of 50 μm on an 80 μm thick polyimide film surface-treated with corona. The coating film was exposed to a mercury UV (ultraviolet light) l...

preparation Embodiment 2

[0115] Preparation Example 2: Preparation of a composition for forming a decorative layer

[0116] 35.0 g of a coloring agent (based on 100 parts by weight) composed of a first white pigment having an average diameter of 200 nm as C.I. Pigment White 6 and a second white pigment having a diameter size of 100 nm and a refractive index of 1.57 as C.I. The first white pigment, the amount of the second white pigment is 10 parts by weight), 4.94g of binder resin (copolymer of methacrylic acid and benzyl methacrylate, wherein methacrylic acid unit and benzyl methacrylate The molar ratio of the unit is 31:69, and the weight average molecular weight according to polystyrene is 20000), 4.32 g of BYK-180 (manufactured by BYK company) as a dispersant, and 55.74 g of propylene glycol monomethyl ether as a solvent Acetate was mixed and dispersed by a bead mill for 2 hours to prepare a colorant-dispersed composition.

[0117] 50.2 g of the colorant-dispersed composition, 29.5 g of a copolym...

preparation Embodiment 3

[0124] Preparation Example 3: Preparation of Pressure-Sensitive Adhesive Composition

[0125] 0.05 parts by weight of an adduct of trimethylolpropane and xylene diisocyanate (XDI) was mixed with 100 parts by weight of the acrylic-based copolymer of Synthesis Example 1 to prepare a pressure-sensitive adhesive composition. The pressure sensitive adhesive composition was mixed with ethyl acetate solvent to obtain a solids content of 20% by weight.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides an optical laminate, which comprise a cover window, a decoration layer and an adhesive layer, and a flexible display comprising the optical laminate, a step followability coefficient (Y) of the adhesive layer of the optical laminate being 1 or more. The optical laminate according to the present invention has excellent step followability and thus enables inhibition ofbubble generation in a stepped part, and has excellent flexural resistance in high temperature and humidity conditions and thus can be effectively used for a flexible display.

Description

technical field [0001] The present invention relates to an optical laminate and a flexible display comprising the same. More specifically, the present invention relates to an optical laminate having excellent step height followability, thereby allowing the occurrence of air bubbles in the step height portion to be suppressed, and having excellent bending resistance under high-temperature and high-humidity conditions; and comprising the Optical laminates for flexible displays. Background technique [0002] Among pressure-sensitive adhesives, optically clear adhesives (OCAs) having high transparency have been used for interlayer adhesion of laminate parts in display devices. Such an optically transparent adhesive should have high transmittance and low haze and satisfy properties such as adhesion to various substrates, heat resistance, and heat-and-moisture resistance. [0003] Recently, a flexible display device using a flexible cover window, which can maintain display perfo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/29G02B1/04G02B1/00G02B5/30G02F1/1335
CPCG02B1/04G02B5/305G02B1/14G02F1/1335G02B1/002G02B5/30C09J7/29C09J2301/312C09J7/38C09K2323/05B32B2457/208B32B2457/20B32B2405/00C09K2323/057B32B2457/202
Inventor 俞炳默姜大山林钟官
Owner DONGWOO FINE CHEM CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com