Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Induction-type discharge device load
Patent
1992-12-24
1995-01-17
Mis, David
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Induction-type discharge device load
315151, 315158, 315307, 315308, 315360, 315DIG7, H05B 4124, H05B 4136
Patent
active
053828780
ABSTRACT:
An auto-starting lamp system comprises an electrodeless high intensity discharge lamp of the type including an arc tube that contains an ionizable fill, an excitation coil surrounding the arc tube for exciting an arc discharge in the ionizable fill at least during steady state lamp operation, and a starter circuit for facilitating arc discharge of the ionizable fill. The system further comprises a controllable r.f. power source for powering the lamp excitation coil, and an electrical network for matching the impedance of the excitation coil to the impedance of the r.f. power source. The impedance-matching network has the same impedance-matching relation during both lamp start-up and steady state lamp operation. A system controller causes the r.f. power source, during lamp start-up, to ramp up in power to a peak level preferably substantially in excess of a steady state lamp operating power level, and then to decrease from the peak level. Preferably, the system further comprises circuitry for re-powering the starter circuit after a predetermined period of time has elapsed that is sufficiently long as to prevent thermal damage to the lamp resulting from powering the starter circuit. The system preferably further comprises control circuitry for alternately turning on and turning off power to the starter circuit after the lamp ionizable fill recovers an ability to reach full arc discharge after being extinguished.
REFERENCES:
patent: 4656397 (1987-04-01), Chappell et al.
patent: 4763044 (1988-08-01), Nuckolls et al.
patent: 4894591 (1990-01-01), Witting
patent: 5004955 (1991-04-01), Nilssen
patent: 5019751 (1991-05-01), Flory, IV et al.
patent: 5047692 (1991-09-01), Borowiec et al.
patent: 5068578 (1991-11-01), Wegener
patent: 5103143 (1992-04-01), Daub
patent: 5118997 (1992-06-01), El-Hamamsy
patent: 5134345 (1992-07-01), El-Hamamsy et al.
El-Hamamsy Sayed-Amr A.
Secen Michael M.
Thomas Edward J.
Corwin Stanley C.
General Electric Company
Hawranko George E.
Mis David
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