Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1990-02-23
1992-08-18
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315306, 315284, 315310, 315DIG4, 315241R, H05B 4136
Patent
active
051402289
ABSTRACT:
A control circuit is disclosed that can be used to control the light intensity of a fluorescent lamp. A first embodiment of the control circuit includes one variable inductor and a plurality of fixed inductors. A switch is used to connect one of the inductors to the fluorescent lamp in parallel. The intensity of the light output from the lamp is varied either by adjusting the inductance of the variable inductor, or by switching between the fixed inductors. A second embodiment uses a variable capacitor in place of the variable inductor and uses fixed capacitors in place of the fixed inductors.
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Dinh Son
LaRoche Eugene R.
Stocker & Yale, Inc.
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