公开(公告)号：US20220225006A1

公开(公告)日：2022-07-14

申请号：US17149552

申请日：2021-01-14

Applicant: Apple Inc.

Inventor： Nicholas P. Allec ,  Yuta Kuboyama ,  Xiaoyang Zhang ,  Xi Chen ,  Ryan M. Buck ,  Praveesh Chandran ,  Yifei Wang ,  Tingjun Xu

IPC: H04R1/10 ,  G02B5/28 ,  A61B5/00

Abstract: A wearable electronic device such as an earbud, wristwatch, or other device may be provided with a skin sensor. The skin sensor may use optical measurements to detect the presence of skin adjacent to the electronic device. The sensor may have first and second light-emitting devices such as infrared devices that emit light at respective first and second infrared light wavelengths. Reflected light is monitored by a photodetector. Control circuitry can initiate or pause audio playback or take other actions in response to determining from the reflected light measurements that skin is present. The sensor may have a thin-film interference filter or other optical structure that overlaps the first and second light-emitting devices to narrow the angular spread of light emitted from the skin sensor. This reduces tilt sensitivity and helps enhance skin sensor accuracy.