Countermeasure circuit for maintaining the lighting state of LED, information display device or lighting equipment related to the station where the countermeasure circuit is installed

摘要

PROBLEM TO BE SOLVED: To maintain a lighting state of an LED provided in an electric device such as an information display device or a lighting fixture, a countermeasure circuit for maintaining the lighting state of the LED, and an information display device relating to a station provided with the countermeasure circuit. Or the purpose is to provide lighting equipment. SOLUTION: This is a countermeasure circuit A for maintaining a lighting state of an LED, which is mainly composed of a power supply 8 and two substrates 1 and a substrate 2, and the power supply 8 is passed through a substrate 1, a substrate 2 and an electric wire 3. Electrically connected, a plurality of semiconductor light emitting elements 4 are provided in series in the same polar direction on each substrate, and corresponding to each semiconductor light emitting element 4, a constant voltage element is provided, and a constant voltage diode 5 is arranged in parallel. , The configuration is provided in the opposite direction. [Selection diagram] Fig. 1