Discharge lamp operating circuit using piezoelectric transformer

Details Discharge lamp operating circuit using piezoelectric transformer Discharge lamp operating circuit using piezoelectric transformer

1998-08-26

2000-08-29

Riley, Shawn

Electric power conversion systems

Current conversion

Including automatic or integral protection means

323901, H02H 7122

Patent

active

06111765&

ABSTRACT:
A circuit for operating a discharge lamp having circut input terminals for connection to a supply voltage source and an inverter coupled to the circuit input terminals for generating an AC voltage at a frequency f from a supply voltage supplied by the supply voltage source. A piezotransformer has transformer input terminals coupled to the inverter output terminals. Terminals for lamp connection are coupled to the inverter output terminals and is provided for detecting whether the lamp has ignited. A protective device is coupled between the output terminals of the inverter and the transformer output terminals so that the inverter is effectively protected against damage due to ignition pulses generated by the piezotransformer.

REFERENCES:
patent: 5548189 (1996-08-01), Williams
patent: 5705877 (1998-01-01), Shimada
patent: 5731652 (1998-03-01), Shimada
patent: 5739679 (1998-04-01), Takehara et al.
patent: 5760619 (1998-06-01), Yamaguchi
patent: 5834907 (1998-11-01), Takehara
patent: 5894184 (1999-04-01), Furuhashi et al.

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