A rear-projection display. The display includes image modulation apparatus for projecting at least a first beam representing an image to be displayed. The display also includes a screen for receiving the first beam on a first side and displaying the image on a second side, opposite the first side. The screen includes energy-responsive apparatus for emitting near-IR light away from the second side. The display also includes a camera for detecting reflected near-IR light and processing circuitry for processing the detecting reflected near-IR light to determine a position touch on the second side.