Ballast for high pressure discharge lamp

Details Ballast for high pressure discharge lamp Ballast for high pressure discharge lamp

2006-12-26

2006-12-26

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S224000, C315S291000, C315S247000

Reexamination Certificate

active

07154228

ABSTRACT:
In a ballast circuit for supplying a high pressure discharge lamp and comprising an up-converter and a bridge circuit, the output voltage of the up-converter is controlled at a higher level immediately after the ignition of the lamp and at a lower level during stationary operation. Stabilization of the discharge immediately after ignition of the lamp and a relatively small power dissipation are both realized in this ballast circuit.

REFERENCES:
patent: 6046551 (2000-04-01), Kita
patent: 6392364 (2002-05-01), Yamamoto et al.
patent: 6437515 (2002-08-01), Kamoi et al.
patent: 10025610 (2001-07-01), None
patent: 0415496 (1991-03-01), None
patent: 1043919 (2000-10-01), None

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