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ELECTRONIC WHITEBOARD

  • US 20140306932A1
  • Filed: 10/11/2013
  • Published: 10/16/2014
  • Est. Priority Date: 04/12/2013
  • Status: Abandoned Application
First Claim
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1. An electronic whiteboard, comprising:

  • a frame comprising inner sides;

    an electronic paper stretched and connected to the inner sides of the frame;

    a plurality of infrared emitters positioned on the inner sides of the frame;

    a plurality of infrared receivers positioned on the inner sides of the frame; and

    a driver in communication with the infrared receivers and the electronic paper;

    wherein infrared light beams emitted from the infrared emitters interweave as a grid that is substantially parallel with and covers the electronic paper, each infrared receiver receives the infrared light beam from a respective one of the infrared emitters to detect if an object inserts into the grid and blocks the infrared light beam to detect positions and thus a trajectory of the object in the grid, and the controller drives the electronic paper to display a writing corresponding to the trajectory in shape and position.

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