US 11,864,864 B2
Wearable device and method for performing registration process in the wearable device
Chun-Chih Chen, Hsin-Chu (TW); Yung-Chang Lin, Hsin-Chu (TW); and Ming-Hsuan Ku, Hsin-Chu (TW)
Assigned to PIXART IMAGING INC., Hsin-Chu (TW)
Filed by PIXART IMAGING INC., Hsin-Chu (TW)
Filed on Sep. 24, 2020, as Appl. No. 17/030,546.
Prior Publication US 2022/0087529 A1, Mar. 24, 2022
Int. Cl. A61B 5/00 (2006.01)
CPC A61B 5/0064 (2013.01) [A61B 5/0082 (2013.01); A61B 5/681 (2013.01); A61B 5/6844 (2013.01); A61B 2560/0266 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for performing a registration process in a wearable device, comprising:
activating a light source of the wearable device to emit 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 a light sensor that is configured to sense the detection light reflected by or passing through an object; and
generating a registration value that serves as a threshold to detect whether or not 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 sensed when the detection light is emitted in a specific wavelength range.