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Determining user compass orientation from a portable device

  • US 8,332,180 B2
  • Filed: 09/03/2009
  • Issued: 12/11/2012
  • Est. Priority Date: 09/03/2009
  • Status: Active Grant
First Claim
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1. A computer-executable method of determining a current orientation of a person from a portable device transported by the person, the method comprising:

  • determining, by a computer, a current orientation of the portable device, wherein the computer includes a user orientation logic;

    determining a state of the person from sensor data collected by the portable device, wherein the determined state specifies a mode of transportation of the person;

    determining the current orientation of the person from the current orientation of the portable device and the determined state of the person, wherein the current orientation of the person is a torso orientation; and

    wherein, said step of determining the current orientation of the person comprises applying to the current orientation of the portable device a current orientation delta identifying a difference in orientation between the portable device and the person.

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