Patent ID: 8514194

Claim:
A touch sensitive image display device for projecting a touch sensitive displayed image at an acute angle onto a surface, the device comprising: image projection optics comprising at least one light source; a remote touch sensing system to remotely detect a touch of a location within or adjacent to said displayed image and having a touch data output; and a control system having a first input coupled to said touch data output to receive data from said remote touch sensing system, wherein said control system is configured to control said device responsive to remote detection of a touch of a said location within or adjacent to said displayed image; and wherein the device further comprises: a device data input to receive data defining an image for display; wherein said image projection optics comprises a spatial light modulator (SLM) illuminated by said light source and output optics to project modulated light from said SLM onto said surface at said acute angle; wherein said control system includes memory for storing said data defining said image for display and has a second input coupled to receive said data defining said image for display and an output for driving said SLM to display data on said SLM to replay said displayed image on said surface; and wherein said remote touch sensing system further comprises a touch imaging sensor, and a system to: input touch location data from said touch imaging sensor for identifying said detected touch of a location; apply anti-distortion processing to convert said touch location data to rectangular x-y co-ordinates to provide anti-distorted detected touch data in said rectangular x-y co-ordinates; and provide said anti-distorted detected touch data to said touch data output for input to said control system.