Abstract: A display system includes a display, and a projection device configured to project, substantially simultaneously, image pixels onto the display and an optical signal encoding data onto the display.

Abstract: In accordance with one embodiment of the present disclosure, a difference is detected between a first image and a second image. The second image can include at least a portion of the first image reflected from a display panel and light from an object passing through the display panel.

Abstract: A token having a symbol can cause initiation of an application.

Abstract: An attribute of an image of an object produced by placing the object on an exterior surface of a touch screen of an interface is determined, and a property of an input to the interface is determined based on the attribute of the image.

Abstract: An interactive display system is disclosed. The interactive display system includes a display surface and a digital light processor configured to project a plurality of pixels onto said display surface to generate a viewable image. The digital light processor is further configured to substantially simultaneously project encoded optical signals to said display surface such that said viewable image is not noticeably degraded.