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Power management apparatus and methods for portable data terminals

  • US 7,577,516 B2
  • Filed: 05/09/2006
  • Issued: 08/18/2009
  • Est. Priority Date: 05/09/2006
  • Status: Expired due to Fees
First Claim
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1. A portable data terminal comprising:

  • a central controller that has a sleep state wherein at least some of the functionality of the central controller may be limited to conserve power;

    a GPS system that outputs location data; and

    an auxiliary processor that operates using less power than the central controller when said central controller is fully activated, wherein during a power saving mode of operation the central controller operates with at least some functionality limited while the auxiliary processor monitors the output of the GPS system and signals the central controller to deactivate said sleep state based on the output of the GPS system.

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