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Display pointer tracking device

  • US 6,377,242 B1
  • Filed: 12/02/1999
  • Issued: 04/23/2002
  • Est. Priority Date: 12/02/1999
  • Status: Expired due to Term
First Claim
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1. An electronic tracking device whose output is absolute x and y coordinates of a light pointer'"'"'s image on a display and synchronization information, said device comprises:

  • a microcontroller;

    video-processing logic, wherein said video processing logic further comprises;

    a processor for video data, and a processor for timing data;

    two synchronized counters;

    a latch;

    control logic, wherein said control logic further comprises;

    a high-speed comparator, and an oscillator;

    a counter control; and

    a prescaler, wherein said prescaler has a dividing ratio greater than zero but not greater than one-quarter.

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