Grid controlled gas discharge lamp

Details Grid controlled gas discharge lamp Grid controlled gas discharge lamp

1992-06-08

1993-12-28

O'Shea, Sandra L.

Electric lamp and discharge devices

Discharging devices with apertured electrode interposed...

313492, 313597, H01J 146, H01J 162

Patent

active

052742997

ABSTRACT:
A low pressure gas discharge lamp (such as a fluorescent lamp) which includes a wire mesh grid disposed within the lamp envelope so as to intercept the electrons flowing between the lamp electrodes. A lead wire extends from the grid to the outside of the lamp envelope, when the grid is provided with a negative voltage with respect to the surrounding plasma the lamp may switched off. The grid controlled lamp eliminates the need for a solid state power switch in the lamp driving circuitry. As such, the lamp current flows only through the lamp not through the electronic ballast/lamp driving circuitry. With the lamp current removed from the ballast circuitry, power dissipation problems in the driver circuitry is eliminated. The grid controlled lamp design greatly facilitates circuit design.

REFERENCES:
patent: 2117246 (1938-05-01), Hagland
patent: 2725497 (1955-11-01), Mason
patent: 2899586 (1959-10-01), Hernqvist
patent: 3376457 (1968-04-01), Hoeh
patent: 4521718 (1985-06-01), Byszewski et al.
patent: 4620135 (1986-10-01), Donaldson

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