Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1992-03-20
1996-06-04
Pascal, Robert J.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315158, 315360, 315DIG7, G05F 100
Patent
active
055236561
ABSTRACT:
A circuit arrangement for operating a high-pressure discharge lamp provided with a ballast circuit VI for generating a current through the high-pressure discharge lamp from a supply voltage. A controller is provided for controlling the power consumed by the high-pressure discharge lamp. The run-up behavior of the high-pressure discharge lamp is governed by an apparatus III for controlling the luminous flux of the high-pressure discharge lamp and by a device IV for the automatic activation of the controller after the run-up of the high-pressure discharge lamp. As a result, the luminous flux of a high-pressure discharge lamp operated by the circuit arrangement has the same, substantially constant value during substantially the entire time duration of the run-up of the high-pressure discharge lamp as during stationary lamp operation.
REFERENCES:
patent: 3483428 (1969-12-01), Plante
patent: 4190795 (1980-02-01), Schultheis
patent: 4682084 (1987-07-01), Kuhnel et al.
patent: 5043635 (1991-08-01), Talbott et al.
Blocker Edward
Franzblau Bernard
Pascal Robert J.
Shingleton Michael B.
U.S. Philips Corporation
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