Discharge lamp lighting device

Details Discharge lamp lighting device Discharge lamp lighting device

1983-05-05

1984-12-11

Dixon, Harold

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Discharge device and/or rectifier in the cathode or heater...

315207, 315243, 315DIG7, H05B 3900

Patent

active

044880871

ABSTRACT:
A discharge lamp lighting device comprises a discharge lamp (1) with a pair of filaments (101a, 101b), an inductive balast (2) coupled with said lamp (1) and a power supply, a non-linear dielectric element (4) coupled across said lamp (1), a semiconductor switch (3) coupled substantially parallel with said non-linear dielectric element (4), and delay means ((6,7,303c,304b,303d), (8,303c,304b,303b), (9,10,60), (6,11)) for shifting firing phase of said semiconductor switch (3) so that a spike voltage induced by said non-linear dielectric element increases gradually for every cycle of a power supply voltage.

REFERENCES:
patent: 3836817 (1974-09-01), Tchang et al.
patent: 3978368 (1976-08-01), Tomura et al.
patent: 4165475 (1979-08-01), Pegg et al.
patent: 4381476 (1983-04-01), Adachi et al.
patent: 4442380 (1984-04-01), Adachi

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