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Wearable heart rate monitor

  • US 8,948,832 B2
  • Filed: 05/30/2014
  • Issued: 02/03/2015
  • Est. Priority Date: 06/22/2012
  • Status: Active Grant
First Claim
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1. A method of operating a heart rate monitor of a wearable fitness monitoring device comprising a plurality of sensors including the heart rate monitor, the method comprising:

  • (a) operating the heart rate monitor in a first mode while also operating in a second mode configured to detect near proximity of the wearable fitness monitoring device to a user'"'"'s skin, wherein the first mode is configured to determine one or more characteristics of a user'"'"'s heartbeat waveform when the wearable fitness monitoring device is in near proximity to the user, and wherein operating the heart rate monitor in the second mode comprises pulsing a light source in the heart rate monitor at a second mode frequency and detecting light from the light source at the second mode frequency, and operating the heart rate monitor in the first mode comprises pulsing the light source in the heart rate monitor at a first mode frequency, which is different from the second mode frequency, and detecting light from the light source at the first mode frequency;

    (b) from information collected in the second mode, determining that the heart rate monitor is not proximate to the user'"'"'s skin; and

    (c) in response to determining that the heart rate monitor is not proximate to the user'"'"'s skin, ending operating the heart rate monitor in the first mode, and wherein operations (b) and (c) are carried out by a processor.

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