Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Discharge device and/or rectifier in the cathode or heater...
Patent
1976-02-11
1977-08-02
La Roche, Eugene R.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Discharge device and/or rectifier in the cathode or heater...
315106, 315205, 315DIG2, H05B 41232
Patent
active
040398951
ABSTRACT:
A device for starting a discharge lamp by means of a transistor starter provided with an auxiliary transistor for stopping the starting procedure if the lamp fails to ignite.
A zener diode is included in the control circuit of the auxiliary transistor, a capacitor is connected in parallel across the lamp, and a self-inductor is included in the connection from the lamp to the main transistor. The auxiliary transistor has a second function in that, by the action of the zener diode, the auxiliary transistor delays the conduction of the main transistor so that a large rise of the voltage between the lamp electrodes is produced, which provides a more reliable ignition of the lamp within a large temperature range.
REFERENCES:
patent: 3857060 (1974-12-01), Chermin
patent: 3875459 (1975-04-01), Remery et al.
patent: 3919590 (1975-11-01), Remery et al.
Chermin Hubertus Mathias Jozef
Luursema Meerten
Rozenboom Jaap
Smulders Herman Adrianus Godefridus
Franzblau Bernard
La Roche Eugene R.
Trifari Frank R.
U.S. Philips Corporation
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