Method for detecting position of input devices on a screen using infrared light emission
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United States of America Patent
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Issued Date -
Feb 7, 2008
app pub date -
Aug 6, 2007
filing date -
Aug 7, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system for using IR light emitted from a wireless input device for the purpose of locating and tracking the device on a transparent sensor pad associated with an electronic display screen. The sensor pad incorporates embedded photo-sensors at the edges of the pad for detecting, identifying, and locating the input device. The input device may be powered by EM field, or light emitted by the display screen.
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