Controllable power supply circuit for an illumination system...

Details Controllable power supply circuit for an illumination system... Controllable power supply circuit for an illumination system...

2005-08-01

2010-12-21

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S307000, C315SDIG002

Reexamination Certificate

active

07855516

ABSTRACT:
A method for reducing acoustic noise produced during use of a lamp dimmer detects whether the dimmer is a leading edge (101) or a trailing edge dimmer (102). A nominal firing time of a leading edge dimmer is determined and a post-correction applied to a voltage applied to the dimmer starting from the nominal firing time so as to build-up the voltage gradually during a predetermined post-correction time period and thereby reduce the rate of rise of the leading edge thereof. A nominal cutoff time of a trailing edge dimmer is determined and a pre-correction applied to a voltage applied to the dimmer starting from the nominal cut-off time so as to diminish the voltage gradually during a predetermined pre-correction time period and thereby reduce the rate of rise of the leading edge thereof. Other methods are disclosed for soft starting filament lamps and controlling dimmer circuits.

REFERENCES:
patent: 4528494 (1985-07-01), Bloomer et al.
patent: 5600233 (1997-02-01), Warren et al.
patent: 5740021 (1998-04-01), Lecheler et al.
patent: 6034790 (2000-03-01), Kamei et al.
patent: 6097158 (2000-08-01), Manor et al.
patent: 6246182 (2001-06-01), Yamasaki et al.
patent: 7443107 (2008-10-01), Shannon et al.
patent: 2002/0071299 (2002-06-01), Franck et al.
patent: 2003/0127994 (2003-07-01), Patchornik et al.
patent: 2003/0168996 (2003-09-01), Brevetti et al.
patent: 1 220 579 (2002-07-01), None
patent: WO 03/058801 (2003-07-01), None

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