公开(公告)号：US20220087529A1

公开(公告)日：2022-03-24

申请号：US17030546

申请日：2020-09-24

Applicant: PIXART IMAGING INC.

Inventor： CHUN-CHIH CHEN ,  YUNG-CHANG LIN ,  MING-HSUAN KU

IPC: A61B5/00

Abstract: A wearable device and a method for performing a registration process in the wearable device are provided. The wearable device includes a light source, a light sensor and a microcontroller that performs the method. In the method, the light source is activated to emit a detection light and the light sensor senses a reflected light. A light intensity of the reflected light is calculated. A registration value is produced based on the light intensity. Specifically, the detection light with a specific frequency to be registered in the registration value is used as a reference to detect whether the wearable device is properly worn by a person. For example, since the wearable device can be worn on the person's wrist, the registration value is used to detect whether the wearable device is away from the wrist.

公开(公告)号：US20240081649A1

公开(公告)日：2024-03-14

申请号：US18517873

申请日：2023-11-22

Applicant: PIXART IMAGING INC.

Inventor： CHUN-CHIH CHEN ,  YUNG-CHANG LIN ,  MING-HSUAN KU

IPC: A61B5/00

CPC classification number: A61B5/0064 ,  A61B5/0082 ,  A61B5/681 ,  A61B5/6844 ,  A61B2560/0266

Abstract: A wearable device and a method for performing a registration process in the wearable device are provided. The wearable device includes a light source, a light sensor and a microcontroller that performs the method. In the method, the light source is activated to emit a detection light and the light sensor senses a reflected light. A light intensity of the reflected light is calculated. Specifically, an upper limit and a lower limit are referred to for detecting whether the wearable device is properly worn by a person. For example, since the wearable device can be worn on the person's wrist, the registration value is used to detect whether the wearable device is away from the wrist.