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Device and related method for converting display screen into touch panel screen

  • US 20100328200A1
  • Filed: 06/24/2010
  • Published: 12/30/2010
  • Est. Priority Date: 06/30/2009
  • Status: Abandoned Application
First Claim
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1. A light pointing touch panel display device, which converts a display screen into a touch panel screen, comprising:

  • a projection screen;

    an image projection unit for projecting an image on the projection screen;

    a light pointer for emitting a light spot signal of a specific wavelength on the projection screen;

    an image detecting unit, comprising;

    a fisheye lens for receiving the image on the projection screen to generate a fisheye distorted image; and

    an optical filter for filtering out the optical energy except the light spot signal of the specific wavelength;

    an image processing unit, coupled to the image detecting unit, for calculating a first position of the light spot on the projection screen according to the fisheye distorted image; and

    a message transmitting unit, coupled to the image processing unit, for outputting a touch panel signal according to the calculating result of the image processing unit.

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