Drive circuit for a solar lamp with automatic electrical control

Details Drive circuit for a solar lamp with automatic electrical control Drive circuit for a solar lamp with automatic electrical control

1995-07-26

1997-06-24

Pascal, Robert

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

315158, 315149, 315 48, 315DIG7, 315DIG2, H05B 3900

Patent

active

056420161

ABSTRACT:
A solar lamp drive circuit is arranged to delay start-up while a current is supplied to the lamp filament to warm up the filament. During operation, the back e.m.f. induced in the lamp is sampled, and, if operating conditions deteriorate, the current to the filament is reapplied automatically and the power supply to the lamp increased.

REFERENCES:
patent: 3389299 (1968-06-01), Bell
patent: 4398128 (1983-08-01), Wollank
patent: 4410930 (1983-10-01), Yachabach
patent: 4486820 (1984-12-01), Baba et al.
patent: 4746841 (1988-05-01), Ogawa
patent: 5155668 (1992-10-01), Tanner et al.
patent: 5179326 (1993-01-01), Nilssen
patent: 5217296 (1993-06-01), Tanner et al.

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