Light source including parallel driven low pressure RF fluoresce

Details Light source including parallel driven low pressure RF fluoresce Light source including parallel driven low pressure RF fluoresce

1992-10-16

1994-06-28

Pascal, Robert J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315246, 315254, 315324, 315344, 315205, 315 35, H05B 4116

Patent

active

053250249

ABSTRACT:
A fluorescent light source includes multiple fluorescent lamp tubes driven in parallel by a single RF source. The fluorescent lamp tubes can be twin tube fluorescent lamps or straight fluorescent lamps. RF electrical energy is capacitively coupled to low pressure discharges within each fluorescent lamp tube. External capacitive coupling electrodes can be formed at or near the ends of each fluorescent lamp tube. Alternatively, cold cathode electrodes can be located within the fluorescent lamp tubes. Ballasting of the fluorescent lamp tubes is provided by capacitive coupling between the plasma of the low pressure discharge and the electrodes, thus eliminating the need for external ballasting components.

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patent: 4427923 (1984-01-01), Proud et al.
patent: 4631449 (1986-12-01), Peters, Jr.
patent: 4798997 (1989-01-01), Egami et al.

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