Power circuit with energy recovery for driving an electrolumines

Details Power circuit with energy recovery for driving an electrolumines Power circuit with energy recovery for driving an electrolumines

1994-08-24

1996-09-24

Pascal, Robert

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

315205, 315226, 345 76, 345211, 34082581, G09G 330, H05B 3700

Patent

active

055594026

ABSTRACT:
A drive circuit for an EL device defines a power cycle and performs energy recovery. During a charging phase of the power cycle, a first energy storage device (i.e., inductor) sequentially releases small energy portions from a power source into the EL device. The energy portions incrementally accumulate to create a high energy potential across the EL device. During a discharging phase of the power cycle, a second energy storage device (i.e., inductor) sequentially accepts small energy portions from the EL device to decrementally discharge the EL device. A switching scheme is implemented to pump the energy storage devices to sequentially release or accept the small energy portions. Energy recovery is performed by capturing some of the EL device discharge energy and introducing it back to the EL device during a subsequent charging phase.

REFERENCES:
patent: 4527096 (1985-07-01), Kindlmann
patent: 4859911 (1989-08-01), Kinnard et al.
patent: 4864182 (1989-09-01), Fujioka
patent: 5227696 (1993-07-01), Asars
TEL Timex Electroluminescence specification and application note; May 20, 1993.
"Energy Recovery in EL Drive Systems," Jung, C. C., Gielow, T. A. SPIE vol. 624; Advances in Display Technology VI (1986).
"New Energy Recovery Sustain Circuit for the AC Plasma Display" Weber, L. F., Wood, M. B.; SID 87 Digest (1987).
"A Low-Power Drive Scheme for AC TFEL Displays;" Higgins, M. L.; SID 85 Digest; (1985).
"Power Supply for Electroluminescence Aiming Integrated Circuit " Ueno, F., Inoue, T., Oota, I., Harada, I.; IEEE (1992).

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