Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1990-02-20
1991-09-10
Laroche, Eugene R.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315 82, 315175, 315224, 315DIG7, H04B 4100, H04B 3700
Patent
active
050476955
ABSTRACT:
A method and a ballast circuit are disclosed for operating a xenon-metal halide lamp particularly suited for automotive applications with a direct curernt (DC) levels having selectable amount of ripple imposed thereon. The ripple provides for acoustically straightening the arc between the electrodes of the xenon-metal halide lamp. The DC acoustic operation has the capability of utilizing cataphoresis effect so as to provide a less distracting forward beam illumination for a vehicle.
REFERENCES:
patent: 3746920 (1973-07-01), Flatley
patent: 4117453 (1978-09-01), Hodgson et al.
patent: 4749913 (1988-06-01), Stuermer et al.
patent: 4904907 (1990-02-01), Allison et al.
Allen Gary R.
Allison Joseph M.
Davenport John M.
Hansler Richard L.
Corwin Stanley C.
Dinh Son
General Electric Company
Hawranko George E.
LaRoche Eugene R.
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