Date of patent application: 1993.05.25
trademark
Publication (Announcement)No. CN2 160952
Announcement date 1994.04.06
Category physics
Issue date: 1993 438+02.438+08.
right of priority
Apply for (patent right) Ningbo Beilun Automation Equipment Factory
Address: 3 15806, No.4 Xingxing Road, dagan town Town, Beilun District, Ningbo, Zhejiang.
Inventor (designer) Li Zhizhong; Lin mincheng
International application
International announcement
date of entry
Patent Agency Ningbo Patent Office
Agent Liu Saiyun
abstract
The utility model discloses an optical signboard, which comprises a shell, a bottom side plate, a terminal post, a gasket, a transparent cover, a display film and an LED luminous body protruding from the shell, which are connected in series in a circuit, and the circuit adopts a nonpolar bridge rectifier circuit or is combined with a pulse signal generating circuit to form a gap flash circuit. The photoelectric signboard is connected in series in the control or secondary protection circuit, which can select and identify the fault input in the line operation equipment and remind people to deal with the fault signal, so as to alleviate the upcoming accident in time. The light-emitting area of the optical signboard is large, which is convenient to find the accident point in time, and the circuit is nonpolar, which realizes the conversion between positive and negative poles and expands the application range.
Sovereignty terms
Optical signs used in large industrial projects such as electric power, railway, metallurgy and chemical industry. Used for fault prediction, alarm, command, etc. Comprises a shell (1), a side plate (6) and a bottom plate (9), wherein the bottom plate (9) is provided with a terminal (7) and an insulating gasket (8), a printed circuit board (5) is inserted into the shell (9), and a display film is arranged on the inner wall of the shell. B.b. The LED luminous body has five faces that emit light and protrude from the shell (1); The cross section of the transparent cover (2) is circular.