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Cover window for flexible display device and flexible display device

A flexible display device and durability technology, which is applied in the field of cover windows, can solve the problems that it is not easy and glass is not suitable for flexible displays, and achieve the effect of high scratch resistance and high hardness

Active Publication Date: 2021-10-08
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, it is not easy to produce films that are sufficiently flexible for this purpose 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

[0102] 20 g of trimethylolpropane triacrylate (TMPTA) (manufactured by Cytec, Mw = 296 g / mol, acrylate group equivalent weight = 99 g / mol) as a trifunctional acrylate-based compound, 30 g as a 9-functional MU9800 (manufactured by Miwon, Mw = 3500 g / mol, acrylate group equivalent weight = 389 g / mol), 30 g of a 10-functional urethane acrylate-based compound MU9020 (manufactured by Miwon, Mw = 4500 g / mol, acrylate group equivalent weight = 450 g / mol), 40 g of them, SMP-250AP (acrylic polymer, manufactured by Kyoeisha Chemical, acrylic acid) as an acrylate-based polymer compound Ester group equivalent weight = 240 g / mol to 260 g / mol, weight average molecular weight (Mw): 37,000) binder solution dissolved in propylene glycol monomethyl ether in an amount of 50% by weight, 1 g of Irgacure 184 as a photoinitiator (manufactured by Ciba) and 20 g of methyl ethyl ketone (MEK) were mixed to prepare an acrylate solution.

[0103] 60 g of a solution in which silica particles S1 (average p...

preparation example 1-2 to 1-7

[0105] 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 components used were adjusted as shown in Table 1 below.

preparation example 2-1

[0107]30 g of MU9800 (manufactured by Miwon, Mw = 3500 g / mol, acrylate group equivalent weight = 389 g / mol) as a 9-functional urethane acrylate-based compound, 40 g of 10-functional urethane acrylate-based compound MU9020 (manufactured by Miwon, Mw=4500g / mol, acrylate group equivalent weight=450g / mol), 30g of PU340 (manufactured by Miwon, Mw=2400g) as a trifunctional urethane acrylate-based compound / mol, acrylate group equivalent weight=800 g / mol), 1 g of Irgacure 184 (manufactured by Ciba) as a photoinitiator, and 40 g of methyl ethyl ketone (MEK) were mixed to prepare an acrylate solution.

[0108] 60 g of a solution in which silica particles S1 (average particle diameter of 20 nm, surface-modified by a methacrylate silane coupling agent) was dispersed in n-butyl acetate in an amount of 50% by weight and 100 g of the silica particles A solution of S2 (average particle size of 40 nm, surface modified by acrylate silane coupling agent) dispersed in methyl ethyl ketone (MEK) i...

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Abstract

The present invention relates to a cover window for a flexible display device and a flexible display device comprising the cover window, the cover window comprising: a light-transmitting substrate; and a first hard coating layer and a second hard coating layer which are disposed on opposite surfaces of the light-transmitting substrate, respectively, wherein the first hard coating layer and the second hard coating layer have IR spectrums in which the ratio of the amide C=O peak to the ester C=O peak is within a predetermined range.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No. 10-2019-0058999 filed with the Korean Intellectual Property Office on May 20, 2019 and Korean Patent Application No. 10-2020-0057915 filed with the Korean Intellectual Property Office on May 14, 2020 interest, the disclosure of which is incorporated herein by reference 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F9/30G02B1/14
CPCG09F9/301G02B1/14C08J7/046C08J2379/08C08J2475/14B32B2255/10B32B7/12B32B2457/206B32B2307/536B32B2307/584B32B2255/28B32B15/08B32B2307/21B32B2457/208B32B2457/20B32B27/34B32B2255/26B32B2307/732B32B2307/51B32B2307/418B32B15/088B32B27/281B32B2270/00B32B15/02B32B2307/412B32B2307/546B32B15/043B32B2571/00B32B2307/306B32B27/08B32B27/308B32B27/20
Inventor 朴真荣李汉娜高京门许容准张影来都钟秀
Owner LG CHEM LTD
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