Touch Sensitive Display Devices

摘要

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.

主权项

1. A touch sensing system, the system comprising:
a touch sensor light source to project a plane of light above a surface; a camera having image capture optics configured to capture a touch sense image from a region including at least a portion of said plane of light, said touch sense image comprising light scattered from said plane of light 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; wherein said image capture optics are configured to capture said touch sense image from an acute angle relative to said plane of light; and wherein said image capture optics are configured to compensate for distortion resulting from said acute angle image capture.