Optical touch panel and method of detecting touch point positions on an optical touch panel
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United States of America Patent
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Feb 24, 2015
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N/A
app pub date -
May 3, 2011
filing date -
Dec 24, 2010
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Abstract
An optical touch panel and a method of detecting touch point positions on an optical touch panel are provided. The optical touch panel includes a processing unit, and at least three optical detectors divided into at least two detector groups. Each of the optical detectors is configured to output a signal indicating intensities of light detected thereby, and is associated with a detection range. The processing unit is configured to receive the signals from the optical detectors, to determine which of the optical detectors detect touch points within the respective detection range according to the signals received by the processing unit, and to obtain an optimum set of coordinates for at least one of the touch points with respect to an optimum detector group which is one of the detector groups formed by the optical detectors that detect the touch points.
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