公开(公告)号：US20230171903A1

公开(公告)日：2023-06-01

申请号：US17701724

申请日：2022-03-23

Applicant: NANJING LOPU CO., LTD.

Inventor： Bin ZHU ,  Chengyue LV ,  Jianming QIU ,  Lili JI ,  Chengbing GUO

IPC: H05K5/02 ,  H01L23/32 ,  F24F7/00 ,  E05F1/10 ,  E05F15/611 ,  E05F15/53 ,  E05B47/00 ,  E05B65/00 ,  E05B17/22

CPC classification number: H05K5/0204 ,  H01L23/32 ,  F24F7/00 ,  E05F1/1016 ,  E05F15/611 ,  E05F15/53 ,  E05B47/0012 ,  E05B65/006 ,  E05B17/22 ,  F24F2007/0025 ,  E05Y2201/422 ,  E05Y2201/434 ,  E05Y2201/448 ,  E05Y2201/484 ,  E05Y2201/686 ,  E05Y2800/252 ,  E05Y2900/13 ,  E05Y2900/606 ,  E05B2047/0017

Abstract: A switched-mode light-emitting diode (LED) display unit satisfying fire-fighting smoke exhaust and ventilation requirements includes an LED display unit, a mounting member, an opening-closing actuator and a pressing member. The LED display unit is mounted on the mounting member and the mounting member is mounted on a display panel by an opening-closing actuator and pressed against the display panel by a pressing member. The switched-mode LED display unit provides the pressing member that works to release the pressed mounting member after obtaining a triggering command and the opening-closing actuator that turns on the LED display unit subsequently, thereby meeting the fire smoke exhaust ventilation requirement of the internal surface or the external surface of a building.