公开(公告)号：US20220061142A1

公开(公告)日：2022-02-24

申请号：US17417173

申请日：2019-12-17

Applicant: SIGNIFY HOLDING B.V.

Inventor： XIAJUAN WU ,  DALIBOR CVORIC ,  YE LIU ,  HAIMIN TAO ,  YUN WANG ,  HAN LU ,  JING YANG ,  DEYONG KONG ,  JING LI

IPC: H05B47/20 ,  F21V25/04

Abstract: A lamp has a safety circuit connected to first and second electrical connection terminals. A test is used to detect if the first and second electrical connection terminals are both connected to external power without an interfering impedance such a human body, and only then enable operation of the lamp. A time for the test is different from a time when another lamp in the system applies a test.