Touch Sensitive Display Devices
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United States of America Patent
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N/A
Issued Date -
Sep 4, 2014
app pub date -
Oct 8, 2012
filing date -
Oct 11, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Some embodiments of the present invention provide touch sensitive image display devices including: an image projector to project a displayed image onto a surface; a touch sensor light source to project a plane of light above the displayed image; a camera to capture a touch sense image from light scattered from the plane of light by an approaching object; and a signal processor to process the touch sense image to identify a location of the object. The light path to the touch sensor camera includes a keystone-distortion compensating topical element, in particular a convex curved aspherical minor.
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