OPTICAL TOUCH SENSING STRUCTURE
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United States of America Patent
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Issued Date -
Jun 19, 2014
app pub date -
Mar 31, 2013
filing date -
Dec 13, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An optical touch sensing structure includes a transparent substrate, a transparent adhesive layer and a plurality of transparent optical spheres. The transparent substrate has a top surface, and the transparent adhesive layer is disposed on the top surface of the transparent substrate. The transparent adhesive layer includes a plurality of adhesive portions. The adhesive portions are separate from one another and expose a portion of the top surface. The transparent optical spheres are disposed on the adhesive portions. The transparent optical spheres at each adhesive portion are arranged as a single layer, and the transparent optical spheres are fixed on the transparent substrate via the adhesive portions. When an infrared ray reaches each transparent optical sphere, the infrared ray is retroreflected and reflected by each transparent optical sphere.
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