Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Patent
1989-12-12
1992-06-09
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
315DIG7, 331113A, H05B 4136
Patent
active
051210320
ABSTRACT:
A small fluorescent light turning on power supply device for a liquid crystal TV for operating the back light of the liquid crystal display TV. The invention is characterized in that a resonance type turning capacitor C.sub.S is connected to the light for preventing continuous electric power consumption, coil L.sub.dc is connected between a power supply source and a filter resistor R.sub.S is connected to switching elements, and a capacitor C is connected between the collectors of said two switching elements. According to the invention, an economical small resonance type current source power supply device which is free of noise and switching stress and simultaneously reduces electric power loss to a minimum, can be obtained.
REFERENCES:
patent: 3691450 (1972-09-01), Cox
patent: 3863180 (1975-01-01), Parson
patent: 3973165 (1976-08-01), Hester
patent: 4051413 (1977-09-01), Abadie 315219
Dinh Son
LaRoche Eugene R.
Samsung Electronics Co,. Ltd.
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