Touch screen having a filter for filtering interfering light signals
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United States of America Patent
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Jul 19, 2016
Grant Date -
May 16, 2013
app pub date -
Jul 19, 2011
filing date -
Jul 21, 2010
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Abstract
A touch screen and a multi-channel sampling method thereof are disclosed. The touch screen comprises infrared-emitting diodes, infrared-receiving diodes, a touch detection region, first-stage processing circuits, and a second-stage processing circuit. At least two infrared-receiving diodes receive infrared light emitted from the same infrared light-emitting diode simultaneously, and the at least two infrared-receiving diodes output the received signals to the second-stage processing circuit for processing after the first-stage processing circuits filter out interfering light signals. The touch screen and the multi-channel sampling method thereof according to the present invention can be used to increase the multi-channel sampling rate of the touch screen.
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