发明申请
US20090200955A1 COMBINED BALLAST FOR FLUORESCENT LAMP AND LIGHT EMITTING DIODE AND METHOD OF DRIVING SAME 失效
用于荧光灯和发光二极管的组合电池及其驱动方法

COMBINED BALLAST FOR FLUORESCENT LAMP AND LIGHT EMITTING DIODE AND METHOD OF DRIVING SAME
摘要:
A circuit or combined ballast for driving a fluorescent lamp and at least one light emitting diode (LED) includes an integrated driver circuit having an alternating current (AC) circuit that includes at least one ballast coil for driving the fluorescent lamp and a direct current circuit for driving the LED having a secondary winding inductively coupled with the fluorescent lamp ballast coil for driving the LED. A method of driving a lamp assembly includes at least one fluorescent lamp and at least one light emitting diode (LED) and a combined driver circuit for supplying both the fluorescent lamp and the LED. The combined driver circuit supplies high voltage AC supply to a first portion of the driver circuit to the fluorescent lamp, supplies low voltage DC supply in a second portion of the driver circuit to the LED, and provides a secondary winding in the second portion of the driver circuit that is inductively coupled with a ballast coil in the first portion of the driver circuit that drives the fluorescent lamp.
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