Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2006-03-06
2008-10-21
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S360000
Reexamination Certificate
active
07439690
ABSTRACT:
A lighting control technology for a discharge lamp can be capable of suppressing start-up variations of luminous flux in consideration of variations in lamp voltage. A discharge lamp lighting apparatus can include a lamp voltage detection circuit and a lamp current detection circuit for detecting a lamp voltage and a lamp current of a discharge lamp, respectively. The lamp can include a control circuit for performing a starting-time control for applying a current or power several times as high as a rated value of the lamp in order to light the discharge lamp substantially instantaneously, and a stable-time control for lighting the discharge lamp stably at substantially constant rated power. The lamp current or lamp power can be controlled from a starting time to a stable time in accordance with the voltage value detected by the lamp voltage detection circuit. The starting-time control can be switched to the stable-time control depending on an increase in the voltage value detected by the lamp voltage detection circuit from the starting time to the stable time and depending on a lapse of an arbitrary time.
REFERENCES:
patent: 5140229 (1992-08-01), Yagi et al.
patent: 5142203 (1992-08-01), Oda et al.
patent: 5151631 (1992-09-01), Oda et al.
patent: 5481163 (1996-01-01), Nakamura et al.
patent: 5485061 (1996-01-01), Ukita et al.
patent: 6163115 (2000-12-01), Ishizuka
patent: 6583587 (2003-06-01), Ito et al.
patent: 6693393 (2004-02-01), Konishi et al.
patent: 6960886 (2005-11-01), Ishizuka
patent: 7002305 (2006-02-01), Kambara et al.
patent: 2004/0090188 (2004-05-01), Ishizuka et al.
patent: 2003338393 (2003-11-01), None
Cermak Kenealy & Vaidya LLP
Stanley Electric Co. Ltd.
Tran Thuy Vinh
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