Diagnosis device, diagnosis method, and lamp ballast circuit...

Details Diagnosis device, diagnosis method, and lamp ballast circuit... Diagnosis device, diagnosis method, and lamp ballast circuit...

2011-03-22

2011-03-22

Nguyen, Hoai-An D (Department: 2858)

Electricity: measuring and testing

Electric lamp or discharge device

Electric lamp

C324S522000, C315S291000

Reexamination Certificate

active

07911210

ABSTRACT:
The present invention relates a diagnosis device for detecting an end of lamp life of a lamp, a diagnosis method, and a lamp ballast circuit using the same. The diagnosis device generates a reference lamp voltage by adding a predetermined reference voltage to a distributed voltage corresponding to a lamp voltage applied to a lamp and generates an integrated lamp voltage by integrating the reference lamp voltage. The diagnosis device compares the integrated lamp voltage with a normal range that an integrated lamp voltage has when the lamp is in a normal state.

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FSFR-Series—Fairchild Power Switch (FPS) for Half-Bridge Resonant Converters, 2007, pp. 1-17, Fairchild Semiconductor Corporation.

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