TOUCH PANEL MODULE AND METHOD FOR DETERMINING POSITION OF TOUCH POINT ON TOUCH PANEL
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United States of America Patent
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Issued Date -
Oct 1, 2009
app pub date -
May 7, 2008
filing date -
Mar 28, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A touch panel module includes a surface panel, a band splitter, an optical unit and a control unit. Retro-reflectors are respectively positioned on three peripheral sides of the surface panel, and the band splitter is positioned on the retro-reflector positioned at one peripheral side of the surface panel, where the band splitter totally reflects a light beam within a first band while a light beam with a second band transmits through the band splitter. The optical unit is utilized for generating a first band beam within the first band and for receiving a reflected first band beam from one of the retro-reflectors to generate a first signal, and the control unit performs touch point detection according to the first signal.
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