Infrared touch screen
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United States of America Patent
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Jun 9, 2015
Grant Date -
Oct 4, 2012
app pub date -
Dec 10, 2010
filing date -
Dec 16, 2009
priority date (Note) -
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Abstract
This invention provides an infrared touch screen, comprising: a touch detecting region; a plurality of edges containing at least a first edge and a second edge, wherein the first edge and the second edge are opposite to each other, there are infrared emitters and infrared receivers fixed on the first edge and there are infrared emitters and infrared receivers fixed on the second edge; and a phase managing mechanism configured to control the phase alternation of the infrared touch screen which has a plurality of phases containing at least a first phase and a second phase. With the structure change and phase managing mechanism application in this infrared touch screen, the light interference caused by varying ambient light can be reduced or eliminated effectively.
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