Electric lamp and discharge devices: systems – Current and/or voltage regulation
Reexamination Certificate
2011-03-08
2011-03-08
Owens, Douglas W (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
C315S308000
Reexamination Certificate
active
07902769
ABSTRACT:
An exemplary embodiment provides a current regulator for controlling variable brightness levels for solid state lighting. The current regulator is couplable to a phase-modulating switch, such as a dimmer switch, which is coupled to an AC line voltage. An exemplary current regulator includes a rectifier; a switching power supply providing a first current; an impedance matching circuit; and a controller. The impedance matching circuit is adapted to provide a second current through the phase-modulating switch when a magnitude of the first current is below a first predetermined threshold, such as a holding current of a triac of the phase-modulating switch. The controller is adapted to determine a root-mean-square (RMS) voltage level provided by the phase-modulating switch from the AC line voltage and to determine a duty cycle for pulse-width current modulation by the switching power supply in response to the comparison of the RMS voltage level to a nominal voltage level.
REFERENCES:
patent: 6011357 (2000-01-01), Gradzki et al.
patent: 6175195 (2001-01-01), Janczak et al.
patent: 6577512 (2003-06-01), Tripathi et al.
patent: 6597127 (2003-07-01), Takahashi et al.
patent: 6628089 (2003-09-01), Suomi
patent: 6809498 (2004-10-01), Nakamura et al.
patent: 6870327 (2005-03-01), Takahashi et al.
patent: 6977472 (2005-12-01), Matsubayashi et al.
Rodriguez Harry
Shteynberg Anatoly
A Minh D
Exclara, Inc.
Gamburd Nancy R.
Gamburd Law Group LLC
Owens Douglas W
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