Power optimization for smartwatch

A wireless device, comprising:

• a memory;
• a display;
• a light sensor;
• a low power image sensor;
• a motion sensor;
• and
• at least one processor communicatively coupled to the memory, the light sensor, the motion sensor and the low power image sensor, the at least one processor configured to:
• determine a change in ambient light received by the light sensor of the wireless device;
• determine positional information of the wireless device using the motion sensor, the positional information including an angle of the wireless device, a rotation of the wireless device, a movement of the wireless device, or a combination thereof;
• activate, while the display of the wireless device is turned off, the low power image sensor for a face detection process based on at least one of the change in the ambient light or the positional information of the wireless device;
• and
• turn on the display of the wireless device based on a detected face from the face detection process by the low power image sensor corresponding to an authorized user face.

A wireless device, comprising:

• means for determining a change in ambient light received by the wireless device;
• means for determining positional information of the wireless device, the positional information including an angle of the wireless device, a rotation of the wireless device, a movement of the wireless device, or a combination thereof;
• means for activating, while a display of the wireless device is turned off, a low power image sensor for a face detection process based on at least one of the change in the ambient light or the positional information of the wireless device;
• and
• means for turning on the display of the wireless device based on a detected face from the face detection process by the low power image sensor corresponding to an authorized user face.

A non-transitory computer-readable medium configured to store computer-executable instructions that, when executed by a processor of a wireless device, cause the processor to:

• determine a change in ambient light received by a light sensor of the wireless device;
• determine positional information of the wireless device using a motion sensor, the positional information including an angle of the wireless device, a rotation of the wireless device, a movement of the wireless device, or a combination thereof;
• activate, while a display of the wireless device is turned off, a low power image sensor for a face detection process based on at least one of the change in the ambient light or the positional information of the wireless device;
• and
• turn on the display of the wireless device based on a detected face from the face detection process by the low power image sensor corresponding to an authorized user face.