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1. 发明专利

JP2002197590A EMERGENCY POWER SUPPLY CIRCUIT FOR LIGHT EMITTING DIODE TRAFFIC LIGHT 失效
公开(公告)号：JP2002197590A
公开(公告)日：2002-07-12
申请号：JP2000404558
申请日：2000-12-22
申请人： IRIE AKIO , TAKAGI TAKEKI
发明人： IRIE AKIO , TAKAGI TAKEKI
IPC分类号： H05B37/02 , B61L5/18 , G08G1/07 , H02J9/06
摘要： PROBLEM TO BE SOLVED: To obtain an autonomous system capable of automatically performing change- over into previously charged power when the main power source of a traffic light is interrupted, flickering red or yellow high luminance light emitting diodes while restricting power consumption to the minimum by a control circuit, attaining the smoothness of traffic on roads and railroads and securing the power source of the traffic light, and not depending on an alternative generator in an emergency. SOLUTION: Charging is normally performed in the large capacity aluminum electrolytic capacitor 7 of an emergency time power source circuit for a light emitting diode traffic signal which is incorporated in a traffic light body. When power is interrupted, a relay 1 in a unit 13 flickers the red or yellow signal light 12. A current charged in the capacitor performs the intermittent lighting of the light emitting diodes of the traffic light 12 by a chopper circuit 15 through the use of control waveforms (a waveform turning on/off at about one second interval which is the intermittent wave of several micro seconds to tens of micro seconds) which are generated by a multi-vibrator 14. Then power consumption in the large aluminum electrolytic capacitor 7 is decreased to about a quarter.

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