Touch window and display with the same
Disclosed is a touch window including a substrate, and an electrode layer on the substrate. A retardation difference is 0.2% or less depending on an incident angle of light in the substrate.
1. A touch window comprising:
a substrate; and
an electrode part provided on the substrate and including an electrode layer and a pattern layer having a plurality of first sub-patterns and a plurality of second sub-patterns,
wherein the electrode layer is provided only on the plurality of first sub-patterns,
wherein the plurality of second sub-patterns are provided between the plurality of first sub-patterns,
wherein a width of each first sub-pattern of the plurality of first sub-patterns is larger than a width of each second sub-pattern of the plurality of second sub patterns,
wherein a retardation difference is 0.2% or less depending on an incident angle of light in the substrate,
wherein the pattern layer comprises a photocurable resin composition comprising (a) urethane acrylate oligomer comprising one selected from the group consisting of polycarbonate polyol, polycaprolactone polyol, and combination thereof, (b) a monomer having a double bond, (c) a photoinitiator, and (d) a curing accelerator, and
wherein the monomer having the double bond includes one selected from the group consisting of 1,4-butanediol dimethacrylate, dimethylaminoethyl methacrylate, 2-ethylhexyl methacrylate, iso-decyl methacrylate, glycidyl methacrylate, n-butyl methacrylate, hexyl methacrylate, decyl methacrylate, 1,6-hexanediol dimethacrylate, ethoxylated bisphenol-A dimethacrylate, t-butylaminoethyl methacrylate, isoamyl methacrylate, isobutyl methacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, 1,3-butanediol dimethacrylate, and combination thereof.
2. The touch window of claim 1 , wherein a retardation exceeds 0 nm and is equal to or less than 5 nm depending on the incident angle of the light in the substrate.
3. The touch window of claim 1 , wherein the substrate has water absorption of 0.1% or less.
4. The touch window of claim 1 , wherein wavelength dispersion of the substrate at 400 nm to 700 nm is in a range of 0.9 to 1.1.
5. The touch window of claim 1 , wherein the substrate comprises an optically isotropic film.
6. The touch window of claim 1 , wherein the substrate comprises one selected from the group consisting of cyclic olefin copolymer (COC), cyclic olefin polymer (COP), optically isotropic polycarbonate (PC), and optically isotropic polymethyl methacrylate (PMMA).
7. The touch window of claim 1 ,
the pattern layer is disposed between the substrate and the electrode layer.
8. The touch window of claim 7 , wherein (a) the urethane acrylate oligomer comprises at least one of repetition units expressed in formula 1 and formula 2,
in which the l, m, and n are integers selected in a range of 1 to 30, respectively,
in which the p and the q are integers selected in a range of 1 to 50, respectively.
9. The touch window of claim 7 , wherein (a) the urethane acrylate oligomer further comprises one selected from the group consisting of linear polyol, circular polyol, and combination thereof.
10. The touch window of claim 7 , wherein (a) the urethane acrylate oligomer further comprises circular or linear isocyanate having at least two functional groups.
11. The touch window of claim 7 , wherein (c) the photoinitiator comprises one selected from the group consisting of 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2,2-dimethoxy-1,2-diphenylethan-1-one, 1-hydroxycyclohexylphenylketone, 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholinylpropan-1-one), bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, and combination thereof.
12. The touch window of claim 7 , wherein (d) the curing accelerator comprises one selected from the group consisting of trimethylolpropane triacrylate, glycerine propoxylated triacrylate, pentaerythritol triacrylate, dimethylolpropane tetraacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexa(meth)acrylate, dendritic acrylate expressed in formula 4, and composition thereof,
in which the a, b, c, and d are integers selected in the range of 0 to 5 while satisfying a+b+c+d=5.
13. The touch window of claim 7 , wherein the resin composition constituting the pattern layer further comprises an additive comprising one selected from the group consisting of (e) an anti-foaming agent, a wetting agent, a dispersant, a rheological additive, and combination thereof.
14. The touch window of claim 7 , wherein the resin composition constituting the pattern layer comprises (a) 10 weight % to 65 weight % of the urethane acrylate oligomer, (b) 20 weight % to 90 weight % of the monomer having the double bond, (c) 0.1 weight % to 10 weight % of the photoinitiator, (d) 3 weight % to 10 weight % of the curing accelerator, and (e) 0.5 weight % to 10 weight % of an additive.
15. The touch window of claim 1 ,
wherein the second sub-pattern is adjacent to the first sub-pattern, and
wherein the electrode layer is provided on the first sub-pattern, and a ratio of a width of the first sub-pattern to a width of the second sub-pattern is in a range of 1:0.03 to 1:0.05.
16. The touch window of claim 15 , wherein the ratio of the width of the first sub-pattern to a height of the first sub-pattern is in a range of 1:0.1 to 1:1.
17. The touch window of claim 1 ,
wherein the electrode layer is disposed in a mesh shape.
18. The touch window of claim 1 ,
wherein the electrode layer includes Cu, Au, Ag, Al, Ti, Ni and an alloy thereof.