Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Reexamination Certificate
2005-02-01
2005-02-01
Vu, David (Department: 2828)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Impedance or current regulator in the supply circuit
C315S082000, C315S307000
Reexamination Certificate
active
06850015
ABSTRACT:
A high pressure discharge lamp starter device comprises a starter circuit OC and control element CC. The starter circuit OC is capable of starting up an essentially mercury free high-pressure discharge lamp HPL containing a rare gas and a metal halide. The control element CC controls the starter circuit OC to start up the high pressure discharge lamp HPL, supply a lamp power larger than twice a rated lamp power, reduce lamp power such that light output is not significantly larger compared to that during a stable light emission time and the light output does not rapidly increase, when a metal halide charged in the high pressure discharge lamp HPL is abruptly vaporized, thereafter, gradually reduce the lamp power so as to settle the rated lamp power.
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15thTechnical Meeting on Plasma Physics of Light Sources and its applications, Illuminating Engineering Institute, Dec. 4, 2000, pp. 69-73.
Ishizuka Akio
Kawatsuru Shigehisa
Cooper & Dunham LLP
Harison Toshiba Lighting Corp.
Vu David
White John P.
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