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PORTABLE ELECTRONIC DEVICE WITH TOUCH SCREEN

  • US 20080278462A1
  • Filed: 12/04/2007
  • Published: 11/13/2008
  • Est. Priority Date: 05/09/2007
  • Status: Abandoned Application
First Claim
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1. A portable electronic device comprising:

  • a main body;

    a display screen mounted on the main body;

    a stylus for controlling movement of a cursor on the display screen, the stylus having a light source for generating a light spot on the display screen;

    a camera unit electrically connected with the main body and facing the display screen, the camera unit being configured for capturing images of the display screen and the light spot thereon;

    a processing unit mounted in the main body and electronically coupled to the camera unit, the processing unit being configured for receiving the images from the camera unit at a predetermined frequency, analyzing changes between the images caused by a movement of the stylus, processing and transforming the changes into a control signal to control movement of the cursor on the display screen in response to the movement of the stylus.

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