Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Patent
1997-02-07
1999-09-28
Kinkead, Arnold
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
315283, 315209PZ, 315209R, H05B 4124
Patent
active
059594128
ABSTRACT:
There is provided an inverter circuit for a discharge tube which does not degrade a lighting brightness of a discharge tube even if a driving frequency is increased in order to miniaturize a step-up transformer and so forth, or which does not degrade a lighting brightness of a discharge tube, this is because a voltage applying to a discharge tube is decreased even if peripheral parasitic capacitance of the discharge tube is increased. The inverter circuit for the discharge tube comprises a high frequency oscillating circuit OS and a step-up transformer for boosting an output of the OS, and the discharge tube DT is connected to a secondary side thereof. An impedance matching circuit 10 for matching the impedance of a circuit until the secondary side and the discharge tube is connected to the secondary side of the step-up transformer which consists of a magnetic leakage flux type wire wound transformer having a secondary winding including at least one closely coupled section which is closely coupled to a primary winding and one loosely coupled section which is loosely coupled to the primary winding respectively or a piezoelectric transformer.
REFERENCES:
patent: 4286194 (1981-08-01), Sherman
patent: 4937834 (1990-06-01), Egawa
patent: 5416387 (1995-05-01), Cuk et al.
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