公开(公告)号：US12078320B1

公开(公告)日：2024-09-03

申请号：US18522934

申请日：2023-11-29

申请人： Guangzhou Haoyang Electronic Co., Ltd.

发明人： Yingru Peng ,  Weikai Jiang ,  Xianwen Mai ,  Wenfeng Chen

IPC分类号： F21V14/02 ,  F21V21/06 ,  F21V21/108 ,  F21V23/00 ,  H02K1/18 ,  H02K1/22 ,  F21W131/406

CPC分类号： F21V14/02 ,  F21V21/06 ,  F21V21/108 ,  F21V23/009 ,  H02K1/18 ,  H02K1/223 ,  F21W2131/406

摘要： A stage light fixture with high-stable rotational positioning including a base, a pivoting arm pivoted to the base through a pivoting shaft, and a light head pivoted to the pivoting arm through another pivoting shaft. An angular detector for detecting a rotation angle of the light head and/or the pivoting arm is further provided, which includes a stator assembly and a rotor assembly oppositely arranged each other, wherein the stator assembly has a magnet exciting coil adapted to form an alternating magnetic field in a region of the stator assembly by high-frequency periodic alternating current and voltage and a receiving coil arranged in the alternating magnetic field adapted to form an induced electromotive force; and the rotor assembly is configured to change electromagnetic coupling strength between the magnet exciting coil and the receiving coil during rotation thereof relative to the stator assembly.