Compact fluorescent lamp unit having first and second sealed end

Details Compact fluorescent lamp unit having first and second sealed end Compact fluorescent lamp unit having first and second sealed end

1995-06-29

1997-05-13

Pascal, Robert

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Filament, electric heater, or resistance in shunt with the...

315 58, 315 71, 313344, H05B 3700, H01J 100

Patent

active

056295863

ABSTRACT:
A compact fluorescent lamp unit has a phosphor coated bulb of which first and second sealed end portions. A pair of filaments is disposed in the bulb. The filament contains an emitter for enhancing thermionic emission of electrons therefrom and is caused to be cut off by the self-generated heat when the emitter is substantially dissipated. The lamp device has an inverter circuit containing a resonant capacitor disposed between each one end of the filament coils to pass a resonant current through the capacitor during the operation of the lamp. The filament coil is substantially composed of a tungsten wire having a diameter corresponding to 8 MG though 12 MG and is normally operated with a lamp current ranging from 250 mA to 350 mA. The filament coil has a cold resistance ranging from 2 .OMEGA. to 4 .OMEGA. and an output voltage of the inverter circuit exhibits more than 260 volts when the fluorescent lamp is substituted by a resistor having 5 .OMEGA..

REFERENCES:
patent: 4311942 (1982-01-01), Skeist et al.
patent: 4647820 (1987-03-01), Chermin et al.
patent: 4686412 (1987-08-01), Johnson
patent: 4871944 (1989-10-01), Skwirut et al.

Affiliated with

Also associated with

Rating

Compact fluorescent lamp unit having first and second sealed end does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compact fluorescent lamp unit having first and second sealed end, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact fluorescent lamp unit having first and second sealed end will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1387696