OPTICAL TOUCH SCREEN SYSTEMS USING WIDE LIGHT BEAMS
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United States of America Patent
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Issued Date -
Sep 23, 2010
app pub date -
Apr 15, 2010
filing date -
Feb 15, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A touch screen system, including a screen, a plurality of light sources coupled with the screen, for emitting light, a plurality of photo diodes coupled with the screen, for detecting the light emitted by the light sources, and for identifying the location of a touch on the screen when an absence of the emitted light is detected, and a plurality of lenses coupled respectively with the plurality of light sources to generate wide beams of light over a portion of the screen wherein substantially connected areas of the screen are covered by neighboring wide beams.
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