Wrist-wearable device with integrated electromyography sensor and heart rate monitor

A wrist-wearable device, comprising:

• a wearable capsule, wherein the wearable capsule includes a bottom capsule portion configured to contact a user;
• an electromyography (EMG) sensor disposed within the wearable capsule, the EMG sensor configured to provide biopotential information of a user for determining a movement of the user;
• a plurality of electrodes coupled to the bottom capsule portion and electrically connected to the EMG sensor, wherein the plurality of electrodes is configured to permit transmission of biopotential information from the user to the EMG sensor;
• a photoplethysmogram (PPG) sensor disposed within the wearable capsule, the PPG sensor configured to provide information for determining a heart rate of the user;
• and
• a plurality of light pipes coupled to the PPG sensor and the bottom capsule portion, wherein the plurality of light pipes is configured to permit the transmission of light between the PPG sensor and the bottom capsule portion,
• wherein the biopotential information and information for determining the heart rate of the user is received simultaneously, and sensing of the biopotential information does not alter the information for determining heart rate of the user, and sensing of the information for determining the heart rate of the user does not alter the biopotential information.

A method to manufacture a wrist-wearable device, the method comprising:

• injecting a first material into a mold to form a first shot of a bottom capsule portion of the wrist-wearable device, wherein the first shot of the bottom capsule portion includes a plurality of light pipes configured to permit transmission of light between a photoplethysmogram (PPG) sensor and the bottom capsule portion;
• positioning a plurality of electrodes relative to the first shot of the bottom capsule portion of the wrist-wearable device, wherein the plurality of electrodes is configured to permit transmission of biopotential information from a user to an electromyography (EMG) sensor;
• and
• injecting a second material into the mold to form a second shot of the bottom capsule portion of the wrist-wearable device, wherein the second shot of the bottom capsule portion bonds the plurality of electrodes to the bottom capsule portion of the wrist-wearable device.