Soft start of lamp filament

Details Soft start of lamp filament Soft start of lamp filament

1994-01-28

1995-09-19

Pascal, Robert J.

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Plural load device systems

315291, 315102, 315105, H05B 3700

Patent

active

054518415

ABSTRACT:
A method is provided in which a relatively cold lamp filament may be turned on for a brief period of time, then turned off, then turned on again, then off again, and this process repeated for successively longer periods of on time, until eventually the filament power is left on continuously. This "pulse starting" may be controlled by a programmable microcontroller in association with a power supply to the lamp filament. The result is a longer lasting lamp filament.

REFERENCES:
patent: 2466053 (1949-04-01), Shaper
patent: 4255690 (1981-03-01), Lecornet
patent: 5015921 (1991-05-01), Carlson et al.

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