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Cover window for flexible display device and flexible display device

A technology for flexible display devices and hard coatings, applied in identification devices, applications, household appliances, etc., can solve the problems that glass is not suitable for flexible displays and is not easy to achieve excellent durability, excellent durability, and excellent curling effect

Active Publication Date: 2021-03-23
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since glass is not suitable as a cover plate for protecting such a flexible display, it is necessary to replace glass with plastic resin or the like
However, for this purpose, it is not easy to produce thin films that are sufficiently flexible while exhibiting high hardness at the glass level

Method used

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  • Cover window for flexible display device and flexible display device
  • Cover window for flexible display device and flexible display device
  • Cover window for flexible display device and flexible display device

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-1

[0097] 20 g of trimethylolpropane triacrylate (TMPTA, manufactured by Cytec, Mw = 296 g / mol, acrylate group equivalent = 99 g / mol) as a trifunctional acrylate compound, 30 g of a 9-functional urethane acrylic acid MU9800 (manufactured by Miwon, Mw=3500g / mol, acrylate group equivalent=389g / mol) as an ester compound, 50 g of MU9020 (manufactured by Miwon, Mw=4500g / mol, Acrylate group equivalent = 450 g / mol), 1 g of Irgacure 184 (manufactured by Ciba) as a photoinitiator, and 10 g of methyl ethyl ketone (MEK) were mixed to prepare an acrylate solution.

[0098] In the acrylate solution, 60 g of a solution in which 50% by weight of silica particles S1 (average particle size is 20 nm, surface-modified by a methacrylate silane coupling agent) is dispersed in n-butyl acetate and 100 g of which A solution of 30% by weight of silica particles S2 (average particle size 40 nm, surface-modified by acrylate silane coupling agent) dispersed in methyl ethyl ketone (MEK) was mixed to prepare ...

preparation example 1-2

[0100] 20 g of trimethylolpropane triacrylate (TMPTA, manufacturer: Cytec, Mw = 296 g / mol, acrylate group equivalent = 99 g / mol) as a trifunctional acrylate compound, 30 g as a 9-functional carbamate MU9800 (manufactured by Miwon, Mw=3500g / mol, acrylate group equivalent=389g / mol) of an acrylate compound, 30 g of MU9020 (manufactured by Miwon, Mw=4500g / mol) as a 10-functional urethane acrylate compound , acrylate group equivalent = 450 g / mol), 40 g of SMP-250AP (acrylic polymer, manufactured by Kyoeisha Chemical, acrylate group equivalent = 240 g / mol) as an acrylate-based polymer compound of 50% by weight to 260 g / mol, weight average molecular weight: 37000) a binder solution dissolved in propylene glycol monomethyl ether, 1 g of Irgacure 184 (manufactured by Ciba) as a photoinitiator, and 20 g of methyl ethyl ketone (MEK) were mixed to prepare Acrylate solution.

[0101] In the acrylate solution, 60 g of a solution in which 50% by weight of silica particles S1 (average partic...

preparation example 1-3 to 1-5

[0103] A coating solution for forming a hard coat layer was prepared in the same manner as in Preparation Example 1-1, except that the contents of the ingredients used were adjusted as shown in Table 1 below.

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Abstract

The present invention relates to: a cover window for a flexible display device, comprising a laminate which includes a light-transmitting substrate, and a first hard coating layer and a second hard coating layer respectively formed on both surfaces of the light-transmitting substrate, wherein the modulus ratio of the first hard coating layer to the total modulus of the laminate is 1.5 to 2.0, andthe surface pencil hardness measured from the side of the first hard coating layer is 5H or more on the basis of 750 g; and a flexible display device comprising the cover window.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2019-0059000 filed on May 20, 2019 and Korean Patent Application No. 10-2020-0057914 filed on May 14, 2020, the disclosure of which is via This reference is incorporated herein in its entirety. [0003] The present disclosure relates to a cover window for a flexible display device and a flexible display device. Background technique [0004] Recently, with the development of mobile devices such as smartphones and tablet PCs, there is a need to thin the substrate of the display. Glass or tempered glass is generally used as a material having excellent mechanical properties in windows or front panels of displays of mobile devices. However, the glass increases the weight of the mobile device due to its own weight, and has a problem of breaking due to external impact. [0005] Therefore, research on plastic resins as materials that ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/30G02B1/14G02F1/1337
CPCG09F9/301G02B1/14G02F1/133723G02F1/133305G02F1/133331C08J7/042C08J7/046C08J2379/08C08J2433/06C08J2475/16B32B27/08B32B27/281B32B27/34B32B7/023B32B27/308B32B27/20B32B2307/51B32B2457/20
Inventor 朴真荣许容准张影来
Owner LG CHEM LTD
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