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Touch Screen Having Reduced Visibility Transparent Conductor Pattern

  • US 20070236618A1
  • Filed: 03/31/2006
  • Published: 10/11/2007
  • Est. Priority Date: 03/31/2006
  • Status: Active Grant
First Claim
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1. A transparent touch screen construction comprising:

  • a substrate;

    a plurality of layer stacks disposed on the substrate leaving areas of the substrate exposed and areas of the substrate covered by the stacks, each layer stack comprising a transparent conductor layer and an intermediate layer, the intermediate layer disposed between the substrate and the transparent conductor layer, the intermediate layer having an index of refraction that is less than that of the transparent conductor layer and less than that of the substrate; and

    a plurality of lead lines electrically connected to the transparent conductor layers and configured for connecting to controller electronics adapted to determine touch input information based on signals received when a touch input is coupled to the transparent conductors, wherein the difference in visible light transmission through the areas covered by the stacks and the areas exposed by the stacks has a maximum of about 1% or less and an average of about 0.5% or less.

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