Current inverter for an incandescent lamp in a car radio

Details Current inverter for an incandescent lamp in a car radio Current inverter for an incandescent lamp in a car radio

1990-03-13

1992-06-30

Pellinen, A. D.

Electricity: electrical systems and devices

Polarity reversing

315 77, 315209R, 4551592, 455345, 307 108, H05B 3906

Patent

active

051269147

ABSTRACT:
A lamp power control circuit for electric equipment which has a power supply, supplies power to incandescent lamps fitted to operating parts of electric equipment and is provided with a current-direction inverter unit. This current-direction inverter unit inverts the direction of the electric current flowing through an incandescent lamp in response to a signal generated in response to manual operation of the operating parts. Consequently the effect of electromigration on filaments of incandescent lamps is decreased and occurrence of the notching is reduced, thus extending the life of lamps.

REFERENCES:
patent: 3849607 (1974-11-01), Carbrey
patent: 4292467 (1981-09-01), Odlen et al.
patent: 4400651 (1983-08-01), Nelle

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