Optical touch panel and coordinate information correction method and detecting device therefor
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United States of America Patent
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Feb 12, 2013
Grant Date -
Feb 16, 2012
app pub date -
Dec 22, 2010
filing date -
Aug 12, 2010
priority date (Note) -
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Abstract
A coordinate information correction method for an optical touch panel includes: a) determining a set of to-be-corrected included angle values according to output signals received from light detectors, each of the to-be-corrected included angle values representing an included angle between a base line and a connecting line that extends from a respective one of the light detectors to a location of an object in a light curtain region; b) calculating a set of correction values, each of which is a finite order function of a respective one of the to-be-corrected included angle values; c) calculating a set of corrected included angle values from the set of to-be-corrected included angle values and the set of correction values; and d) generating corrected coordinate information associated with the location of the object in the light curtain region from the corrected included angle values.
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