Low noise inverter for EL lamp

Details Low noise inverter for EL lamp Low noise inverter for EL lamp

1996-05-06

1998-08-04

Lee, Benny

Electric lamp and discharge devices: systems

Regulation of the control current and/or potential applied...

3151693, 3151692, 315209R, 363 16, 323212, G05F 100

Patent

active

057898707

ABSTRACT:
An EL lamp is charged to a first polarity with a series of high voltage pulses, discharged at a controlled rate, charged to a second polarity with a series of high voltage pulses, and discharged at a controlled rate, thereby producing an alternating current through the lamp. A flyback circuit provides the high voltage pulses. The polarity of the pulses is reversed periodically at a low frequency and the EL lamp is prevented from discharging through the flyback circuit by a phase shift circuit that produces a discharge pulse in advance of each change of polarity of the high voltage pulses. The discharge pulse interrupts the high voltage pulses and discharges the EL lamp through a constant current load.

REFERENCES:
patent: 4527096 (1985-07-01), Kindlmann
patent: 4982314 (1991-01-01), Miki
patent: 5172032 (1992-12-01), Alessio
patent: 5313141 (1994-05-01), Kimball
patent: 5418434 (1995-05-01), Kamens et al.
patent: 5502357 (1996-03-01), Kimball
patent: 5559402 (1996-09-01), Corrigan, III
patent: 5576601 (1996-11-01), Koenck et al.
patent: 5581160 (1996-12-01), Fujita

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