POSITION DETECTION APPARATUS FOR A TOUCH PANEL
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United States of America Patent
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Issued Date -
May 26, 2011
app pub date -
Jul 13, 2010
filing date -
Nov 20, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a position detection apparatus for a touch panel. The apparatus includes at least one light source disposed on at least a first edge of the touch panel for illumination of a surface of the touch panel, a first detector disposed on one end of a second edge of the touch panel, and a second detector disposed on the other end of the second edge of the touch panel, wherein each of the first and second detectors comprises a plane mirror reflecting an image from the surface of the touch panel and an image sensor for acquisition of the image from the plane mirror, and a position where a pointer touches the touch panel is determined according to the images acquired by the image sensors of the first and second detectors.
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