Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Plural discharge devices and/or rectifiers in the supply...
Patent
1990-04-09
1991-04-09
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Plural discharge devices and/or rectifiers in the supply...
315 51, 315101, 315105, 313492, 313619, H01J 6110, H05B 3700
Patent
active
050067621
ABSTRACT:
A negative glow fluorescent lamp includes a light-transmissive envelope enclosing a fill material which emits ultraviolet radiation upon excitation, a phosphor coating on an inner surface of the envelope, the phosphor coating emitting visible light upon absorption of ultraviolet radiation, a cathode located within the envelope for emitting electrons, first and second cathode leads extending through the envelope, an anode located in the envelope and spaced from the cathode for collecting electrons and first and second diodes coupled between opposite ends of the anode and the first and second cathode leads, respectively. The glow lamp can include one or more insulating discharge barriers which surround the cathode and block electron bombardment of the cathode during positive half cycles of the AC voltage. The discharge barriers are preferably as large in area as is practical and can be coated with an ultraviolet-reflecting material or with a phosphor layer. The glow lamp operates from an AC voltage and requires only two electrical connections. Lumen maintenance is improved because electron bombardment of the cathode is eliminated. A simple, low-cost ballast can be utilized.
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Bessone Carlo S.
GTE Products Corporation
LaRoche Eugene R.
Yoo Do Hyun
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