Additional electrode for three-level output and improved startin

Details Additional electrode for three-level output and improved startin Additional electrode for three-level output and improved startin

1999-03-10

2000-09-12

Wong, Don

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Discharge device load

315 59, 313306, H01J 744

Patent

active

061182176

ABSTRACT:
A sealed lamp unit for a three-way fluorescent lamp system comprises first and second lamp electrodes located at respective end points of, and extending into, the sealed lamp unit. The sealed lamp unit comprises at least one gas, which breaks-down when an electrical voltage potential is created within the sealed lamp unit. A third lamp electrode is located between the first and second lamp electrodes and extends into the sealed lamp unit. A brightness level of light output from the sealed lamp unit is a function of energizing selected electrodes. A color of the light is independent of the brightness level. A first extended wire connection is electrically connected between the first and second lamp electrodes. A first capacitive impedance, electrically connected in series along the first extended wire connection, limits a current flow through the first extended wire connection. A breakdown voltage path within the sealed lamp unit is modified as a function of a position of the third lamp electrode.

REFERENCES:
patent: 4348612 (1982-09-01), Morton
patent: 4450510 (1984-05-01), Nilssen
patent: 5627433 (1997-05-01), Fulop et al.
patent: 5821699 (1998-10-01), Moisin
patent: 6051930 (2000-04-01), Hammer et al.

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