System and method for reducing power consumption in an optical screen pointing device

  • US 6,797,937 B2
  • Filed: 10/20/2003
  • Issued: 09/28/2004
  • Est. Priority Date: 07/24/2001
  • Status: Expired due to Term
First Claim
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1. A method of switching an optical screen pointing device from a low power mode to a full power mode, the method comprising:

  • detecting a first movement with the optical screen pointing device;

    calculating a first value representing an amount of the first movement;

    storing an accumulated movement value representing an accumulation of previously detected movements;

    updating the accumulated movement value by adding the first value;

    comparing the updated accumulated movement value to a threshold value;

    determining whether to switch to the full power mode based on the comparison of the updated accumulated movement value and the threshold value.

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