Inverter circuit for illuminating an electroluminescent lamp

Details Inverter circuit for illuminating an electroluminescent lamp Inverter circuit for illuminating an electroluminescent lamp

1997-06-09

2000-03-14

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 40, 363 56, 3151693, 315209R, H05B 3308

Patent

active

060381531

ABSTRACT:
An inverter circuit (10) for driving an electroluminescent lamp (14) reduces humming noise by discharging the electroluminescent lamp (14) through a resistor circuit (32). A charging circuit (36 or 38) charges the electroluminescent lamp (14) to a first voltage level during a charge cycle. The electroluminescent lamp (14) is subsequently discharged to a second voltage level through the resistor circuit (32), which prolongs the transition from the first voltage level to the second voltage level, thereby reducing the humming noise components of the inverter circuit (10).

REFERENCES:
patent: 4281374 (1981-07-01), Archer
patent: 4319164 (1982-03-01), Tulleners
patent: 5144203 (1992-09-01), Fujita et al.
patent: 5313141 (1994-05-01), Kimball
patent: 5502357 (1996-03-01), Kimball
patent: 5519288 (1996-05-01), Tatsumi et al.
patent: 5539707 (1996-07-01), Wood
patent: 5557175 (1996-09-01), Wood
patent: 5686797 (1997-11-01), Sanderson
patent: 5789870 (1998-08-01), Remson

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