Optical touch device and method for detecting touch point
An optical touch device utilizes two images sensed by two image sensing units, which are diagonal to each other, to determine whether a number of touch points located at a central touch area is equal to 1. When the number of touch points are larger than 1, the optical touch device further utilizes another two images sensed by another two image sensing units, which are also diagonal to each other, to assist in determining the number of touch points located at the central touch area, so as to improve the accuracy of determination.
Wistron Corporation
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inventional inventional additional inventional
Shih-Wen Yu-Yen Ching-An
Chen Chen Cho