WEARABLE HEART RATE MONITOR
First Claim
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;
(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.
1 Assignment
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Accused Products
Abstract
Some embodiments provide a wearable fitness monitoring device including a motion sensor and a photoplethysmographic (PPG) sensor. The PPG sensor includes (i) a periodic light source, (ii) a photo detector, and (iii) circuitry determining a user'"'"'s heart rate from an output of the photo detector. Some embodiments provide methods for operating a heart rate monitor of a wearable fitness monitoring device to measure one or more characteristics of a heartbeat waveform. Some embodiments provide methods for operating the wearable fitness monitoring device in a low power state when the device determines that the device is not worn by a user. Some embodiments provide methods for operating the wearable fitness monitoring device in a normal power state when the device determines that the device is worn by a user.
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Citations
28 Claims
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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:
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(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; (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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A wearable fitness monitoring device comprising:
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a motion sensor configured to provide output corresponding to motion by a user wearing the fitness monitoring device; a photoplethysmographic sensor comprising (i) a periodic light source, (ii) a photo detector positioned to receive periodic light emitted by the periodic light source after interacting with a user'"'"'s skin, and (iii) circuitry determining a user'"'"'s heart rate from an output of the photo detector; and control logic configured to; (a) operate 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; (b) from information collected in the second mode, determine 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, end operating the heart rate monitor in the first mode. - View Dependent Claims (22)
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23. A wearable fitness monitoring device comprising:
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a motion sensor configured to provide output corresponding to motion by a user wearing the fitness monitoring device; and a photoplethysmographic sensor comprising (i) a periodic light source, (ii) a photo detector positioned to receive periodic light emitted by the periodic light source after interacting with a user'"'"'s skin, and (iii) circuitry determining a user'"'"'s heart rate from an output of the photo detector, wherein the periodic light source comprises two periodic light sources straddling the photo detector. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification