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Touch panel member, touch panel, and touch panel display device

  • US 9,971,433 B2
  • Filed: 02/03/2016
  • Issued: 05/15/2018
  • Est. Priority Date: 03/20/2015
  • Status: Active Grant
First Claim
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1. A touch panel member comprising, in order, at leasta transparent substrate,a transparent electrode, anda protective layer provided so as to cover the transparent electrode,the protective layer comprising three or more layers having different refractive indices,all of the different refractive index layers of the protective layer satisfying Expression 1,and the protective layer satisfying Expression 2 and Expression 3 below,
0<

  • n(x)−

    n(x+1)≤

    0.20 



    (1)
    |n(electrode)−

    n(1)|≤

    0.20 



    (2)
    0.20

    n
    (1)−

    n(N) 



    (3)wherein in the expressions, among the different refractive index layers in the protective layer, the layer that is closest to the transparent electrode is designated as the 1st layer, then the 2nd layer, and so on, and the layer that is farthest from the transparent substrate is designated as the Nth layer, the refractive index of an ath layer of the protective layer is defined as n(a), a denotes an integer satisfying 1≤

    a≤

    N, x denotes an integer satisfying 1≤

    x≤

    N−

    1, and the refractive index of the transparent electrode is defined as n(electrode), wherein all of the 1st layer to the N-1th layer in the protective layer are layers comprising an inorganic material and an organic material, a pencil hardness of the Nth layer of the protective layer is a hardness of 2H or higher, and a film thickness of each of the 1st layer to the Nth layer in the protective layer is 0.02 to 5 μ

    m.

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