Touch Sensitive Image Display Devices

摘要

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.

主权项

1. A touch sensitive image display device, the device comprising:
an image projector to project a displayed image onto a display surface; a touch sensor light source to project light defining a touch sheet above said displayed image; a camera directed to capture a touch sense image from a region including at least a portion of said touch sheet, said touch sense image comprising light scattered from said touch sheet by an object approaching said displayed image; and a signal processor coupled to said camera, to process a said touch sense image from said camera to identify a location of said object relative to said displayed image; wherein said camera is further able to capture an image projected by said image projector; wherein said image projector is configured to project a calibration image; and wherein said touch sensitive image display device further comprises a calibration module configured to use a camera image, captured by said camera, of said calibration image to calibrate locations in said captured touch sense image with reference to said displayed image.