Cornelus Hendricus Bertus Arnoldus van Dinther,David Antoine Christian Marie Roovers
申请号：
US15411096
公开号：
US20170215747A1
申请日:
2017.01.20
申请国别(地区):
US
年份:
2017
代理人:
摘要：
An optical vital signs sensor embodied as a PPG sensor is provided. The optical vital signs sensor comprises a light source to generate light at at least two wavelengths, a photo detector unit configured to detect the light of the at least two wavelengths, a contact surface to be placed against a skin of the user and an off-skin detection unit configured to detect whether the contact surface is in contact with the skin of the user based on output signals of the photo detector at the at least two wavelengths.
