Photo-sensor type touch device and light module and optical lens for the photo-sensor type touch device
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United States of America Patent
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Dec 1, 2015
Grant Date -
Jan 3, 2013
app pub date -
Sep 7, 2012
filing date -
May 17, 2011
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Abstract
A photo-sensor type touch device includes a screen, two light modules, a sensor, and a calculating unit. The screen has a displaying region to show images thereon. The light module emits linear invisible light to the displaying region. The invisible light is substantially perpendicular to a normal of the displaying region. The sensor senses a change of the invisible light on the displaying region when an object approaches the displaying region, and sends a signal out. The calculating unit is electrically connected to the sensor to receive the signal and calculate the signal to obtain a location of the object on the displaying region.
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