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User input apparatus, system, method and computer program for use with a screen having a translucent surface

  • US 20060044282A1
  • Filed: 11/03/2004
  • Published: 03/02/2006
  • Est. Priority Date: 08/27/2004
  • Status: Abandoned Application
First Claim
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1. An information input apparatus comprising:

  • a translucent screen;

    an image capture device located for imaging a first side of the screen opposite a second side where user interaction occurs; and

    an image processor coupled to the output of the image capture device to determine at least one of where and when a person touches an area on the second side of the screen by a change in intensity of light emanating from the touched area relative to a surrounding area.

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