Waveguide materials for optical touch screens
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United States of America Patent
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Feb 21, 2012
Grant Date -
Dec 13, 2007
app pub date -
May 1, 2007
filing date -
May 1, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to polymeric optical materials suitable for use in waveguide-based optical touch screen sensors. In particular, the materials should have a glass transition temperature (Tg) below a minimum operating temperature of the touch screen device. Preferably, waveguides composed of the materials are fabricated on polymer substrates, so that the waveguide assembly is flexible. In this case, the materials should have Tg below a Tg of the polymer substrate.
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