Patent ID: 8827906

Claim:
An activity tracking device, comprising, a housing, the housing including: a motion sensor and a processor, the processor configured for processing motion data produced by the motion sensor; a display screen integrated with the housing to display metrics that quantify the motion data produced by the motion sensor; a light source integrated within the housing to enable light to be directed out of the housing at a heart rate monitor location on the housing; and a light detector integrated within the housing, the light detector configured to capture an amount of the light that is reflected back to the light detector, at least a first portion of the light reflected back to the light detector is reflected from a blood vessel under a skin of a user when the user places the skin over the heart rate monitor location on the housing, the processor further being in communication with the light detector to enable processing of the reflected light, the processing configured to identify heart beats of the user and produce an indication of a heart rate, the indication of the heart rate being displayable on the display screen as an option, in addition to the metrics that quantify the motion data, wherein the heart rate monitor location includes a button and the button has an infrared (IR) light transmitting structure, the light source and the light detector are disposed substantially below the button.