Wearing detection techniques for wearable devices

An apparatus for detecting contact with a wearable device, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• direct light from a first light emitting element of the wearable device to a first light detecting element of the wearable device via an optical interface, wherein the first light emitting element comprises a first diode and the first light detecting element comprises a first detector, and wherein at least one of the first light emitting element or the first light detecting element is dedicated to detecting a level of surface contact at the optical interface;
• measure, via the first light detecting element, an amount of escaped light which escaped the optical interface, wherein the amount of escaped light is indicative of the level of surface contact at the optical interface;
• and
• update one or more measurement parameters for activating a second light emitting element of the wearable device and a second light detecting element of the wearable device based at least in part on the level of surface contact in accordance with the level of surface contact at the optical interface satisfying at least a threshold value, wherein the second light emitting element comprises a second diode and the second light detecting element comprises a second detector, and wherein at least one of the second light emitting element or the second light detecting element is dedicated to measuring a physiological phenomenon at a user of the wearable device.

A non-transitory computer-readable medium storing code for detecting contact with a wearable device, the code comprising instructions executable by a processor to:

• direct light from a first light emitting element of the wearable device to a first light detecting element of the wearable device via an optical interface, wherein the first light emitting element comprises a first diode and the first light detecting element comprises a first detector, and wherein at least one of the first light emitting element or the first light detecting element is dedicated to detecting a level of surface contact at the optical interface;
• measure, via the first light detecting element, an amount of escaped light which escaped the optical interface, wherein the amount of escaped light is indicative of the level of surface contact at the optical interface;
• and
• update one or more measurement parameters for activating a second light emitting element of the wearable device and a second light detecting element of the wearable device based at least in part on the level of surface contact in accordance with the level of surface contact at the optical interface satisfying at least a threshold value, wherein the second light emitting element comprises a second diode and the second light detecting element comprises a second detector, and wherein at least one of the second light emitting element or the second light detecting element is dedicated to measuring a physiological phenomenon at a user of the wearable device.