Touch input device having power profiling
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United States of America Patent
Stats
-
Jun 9, 1987
Grant Date -
N/A
app pub date -
Jun 18, 1984
filing date -
Jun 18, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An infrared touch input system having bezel glare compensation via power profiling is taught. Briefly stated, a touch input system is utilized having a four-sided frame and having an infrared transparent bezel along the inside thereof and having infrared emitters along the top and one side of the frame with infrared detectors along the sides opposite the emitters. The optical power used with emitter-detector pairs adjacent the corners of the bezel is reduced with respect to emitter-detector pairs approaching the center of the bezel. In this manner, light which is reflected after striking the side of the bezel adjacent the emitter-detector pair and which is received by the emitter is of low intensity or is ignored.
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