Patent ID: 11864864
Assignee: PIXART IMAGING INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A wearable device, comprising:
a light source configured to emit a detection light;
a light sensor configured to sense the detection light reflected from an object;
a memory; and
a microcontroller electrically connected with the light source, the light sensor and the memory, and performing a method for performing a registration process in the wearable device, the method including:
activating the light source to emit the detection light, wherein the detection light includes different light rays corresponding to different wavelengths and the detection light is adjusted to cover different wavelength ranges so as to emit at least a first light ray and a second light ray, and the first light ray is determined as a specific light ray when the first light ray causes a larger light intensity sensed by the light sensor than the second light ray;
calculating a light intensity sensed by the light sensor;
generating a registration value that serves as a threshold to detect whether the wearable device is properly worn by a person based on the light intensity, wherein the registration value is obtained when the specific light ray is emitted to the object and is determined based on the light intensity when the detection light is emitted in a specific wavelength range; and
storing the registration value in the memory.