Fluorescent ballast with inherent end-of-life protection

Details Fluorescent ballast with inherent end-of-life protection Fluorescent ballast with inherent end-of-life protection

2009-07-09

2011-12-27

Crawford, Jason M (Department: 2819)

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Radiant energy controlled regulation of the current supply...

C315S224000, C315S247000, C315S272000, C315S291000, C315S307000

Reexamination Certificate

active

08084949

ABSTRACT:
A ballast with end-of-life (“EOL”) protection is presented in which the voltage across a lamp at EOL is controlled to prevent the lamp from overheating, while the voltage across the lamps not at EOL is maintained to allow normal operation of those lamps, and when a new lamp is added to the ballast, the AC voltage across all lamps is controlled to allow ignition of the newly added lamp without cycling the power of the ballast.

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International Search Report issued in connection with corresponding International Application No. PCT/US2010/037396on Aug. 31, 2010.

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