Light source including parallel driven low pressure rf...

Details Light source including parallel driven low pressure rf... Light source including parallel driven low pressure rf...

H - Electricity

01

J

H01J 61/42 (2006.01) H01J 61/56 (2006.01) H01J 65/04 (2006.01) H05B 41/24 (2006.01)

Patent

CA 2108435

ABSTRACT OF THE DISCLOSURE LIGHT SOURCE INCLUDING PARALLEL DRIVEN LOW PRESSURE RF FLUORESCENT LAMPS 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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