Inverter

Details Inverter Inverter

2009-04-08

2011-10-25

Ismail, Shawki S (Department: 2819)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C363S095000, C349S070000

Reexamination Certificate

active

08044604

ABSTRACT:
A soft start circuit generates a soft start voltage which changes over time when light emission of an EEFL is started. A pulse modulator receives a feedback voltage that corresponds to the output voltage of an inverter and the soft start voltage, and adjusts the duty ratio of a pulse signal PWM such that these two voltages match one another using a feedback operation. A striking control circuit monitors an error signal which is asserted when an abnormal state occurs. In a case in which the error signal has been asserted at a detection timing after the soft start voltage has reached a target voltage, the striking control circuit resets and restarts the soft start circuit. A driver controls the switching of the voltage at the primary coil of a transformer according to the pulse signal received from the pulse modulator.

REFERENCES:
patent: 7236377 (2007-06-01), Fukumoto
patent: 7944652 (2011-05-01), Fukumoto
patent: 2004/0130921 (2004-07-01), Fukumoto
patent: 2003-323994 (2003-11-01), None

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