Rare gas fluorescent lamp apparatus

Details Rare gas fluorescent lamp apparatus Rare gas fluorescent lamp apparatus

2007-02-13

2007-02-13

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000

Reexamination Certificate

active

11232945

ABSTRACT:
When a control unit is operated by a lighting control signal, when a reference voltage source unit outputs the reference voltage, voltage inputted into an error amplifier from a time constant circuit increases gradually with passage of time so as to reach the reference voltage. The error amplifier compares the voltage, which gradually increases with a power to be impressed to a lamp. An inverter circuit controls power to be supplied to the lamp according to the error signal. Thereby, the lamp power is controlled at time immediately after the lamp lighting signal is inputted. In addition, by providing a thermo-sensitive element for detecting circumference environmental temperature, it is possible to reduce influence to the light intensity due to the circumference environmental temperature. Further, the time constant circuit and the thermo-sensitive element may be provided in the detecting circuit.

REFERENCES:
patent: 6288501 (2001-09-01), Nakamura et al.
patent: 6437519 (2002-08-01), Ito
patent: 6495971 (2002-12-01), Greenwood et al.
patent: 6605906 (2003-08-01), Okamoto et al.
patent: 7002305 (2006-02-01), Kambara et al.
patent: 2002/0167284 (2002-11-01), Okamoto et al.
patent: 2005/0012473 (2005-01-01), Samejima et al.
patent: 05-335091 (1993-12-01), None

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