Patent ID: 9348433
Filing Date: 2016-05-24
CPC Classification: G06F

Claim Text:
1. An optical touch sensing structure, comprising: a transparent substrate; and a plurality of optical particles with metallic composition, disposed on the transparent substrate, wherein when an infrared is incident on each of the optical particles with metallic composition, the infrared is reflected by each of the optical particles with metallic composition; a transparent adhesive layer, disposed on the transparent substrate, wherein a refractive index of the transparent adhesive layer is identical or similar to a refractive index of the transparent substrate, and the optical particles with metallic composition are fixed on the transparent substrate by the transparent adhesive layer, the transparent adhesive layer completely covers the transparent substrate and the optical particles with metallic composition are distributed in the transparent adhesive layer; a plurality of light absorbing portions, disposed on the transparent adhesive layer and exposing a portion of the transparent adhesive layer; and a transparent protective layer, disposed on the transparent adhesive layer and covering the light absorbing portions and the portion of the transparent adhesive layer exposed by light absorbing portions, wherein a refractive index of the transparent protective layer is identical or similar to the refractive index of the transparent substrate and identical or similar to the refractive index of the transparent adhesive layer.