Method and system to display a virtual input device
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United States of America Patent
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N/A
Issued Date -
Jan 30, 2003
app pub date -
Jun 24, 2002
filing date -
Jun 22, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A system to project the image of a virtual input device includes a substrate bearing a diffractive pattern, and a source of collimated light, such as a laser diode. The collimated light interacts with the substrate and the pattern to project a user-viewable image that preferably is the image of a virtual input device. Interaction between a user and the projected image of the virtual input device can then be sensed, and used to input information or otherwise control a companion device, for example a PDA or a cellular telephone.
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