Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Reexamination Certificate
2002-12-19
2008-12-23
Vo, Tuyet (Department: 2821)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
C361S093100
Reexamination Certificate
active
07468878
ABSTRACT:
A high frequency electronic ballast for main loads, such as an HID lamp, includes a regulated low voltage output to drive auxiliary loads. A low voltage microcontroller generates a low voltage drive signal in response to voltage and frequency of a high voltage power supply. A switch operably connected to the high voltage power supply and responsive to the low voltage drive signal provides the regulated low voltage output to drive the auxiliary devices, such as a back-up incandescent lamp and/or an insulation detector. In one embodiment, the low voltage output may be responsive to the HID lamp power, e.g., a control signal from a ballast microcontroller, so that the back-up incandescent lamp is energized when the HID lamp is not providing sufficient illumination.
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Deurloo Oscar J.
Hollander Jonathan
Orlov Dimitry
Koninklijke Philips Electronics , N.V.
Vo Tuyet
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