High-pressure discharge lamp operating circuit

Details High-pressure discharge lamp operating circuit High-pressure discharge lamp operating circuit

1984-04-24

1986-05-06

Moore, David K.

Electric lamp and discharge devices: systems

Plural power supplies

Plural diverse pulsating or a.c. supplies

315175, 315 86, 315DIG7, H05B 4114, H05B 4126

Patent

active

045874603

ABSTRACT:
A high pressure discharge lamp in which discharge between a pair of main electrodes in an arc tube of the discharge lamp is sustained by a D.C. or high frequency current. The circuit comprises discharge mode controller for controlling the discharge such that mainly a low-frequency discharge is produced between the main electrodes at least within a predetermined time from initiation of the discharge within the arc tube, and subsequently transferred to the D.C. or high-frequency discharge.

REFERENCES:
patent: 3170084 (1965-02-01), Retzer
patent: 3189790 (1965-06-01), Nuckolls
patent: 3373313 (1968-03-01), Prines et al.
patent: 3875459 (1975-04-01), Remery et al.
patent: 4362971 (1982-12-01), Sloan, Jr.

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