Touch Sensitive Image Display Devices
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United States of America Patent
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Issued Date -
Dec 11, 2014
app pub date -
Jan 17, 2013
filing date -
Jan 20, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
We describe a touch sensitive image display device. The device comprises: an image projector to project a displayed image onto a surface in front of the device; a touch sensor light source to project light defining a touch sheet above the displayed image; a camera directed to capture a touch sense image comprising light scattered from the touch sheet by an object approaching the displayed image; and a signal processor to process a the touch sense image to identify a location of the object relative to the displayed image. The camera is able to capture an image projected by the image projector, the image projector is configured to project a calibration image, and the device includes a calibration module configured to use a calibration image from the projector, captured by the camera, to calibrate locations in said captured touch sense image with reference to said displayed image.
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