Tubular fluorescent lamp with intermediate electrode

Details Tubular fluorescent lamp with intermediate electrode Tubular fluorescent lamp with intermediate electrode

1990-06-15

1992-08-11

DeMeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313492, 313493, H01J 6142, H01J 6132, H01J 6104

Patent

active

051382237

ABSTRACT:
In a fluorescent lamp, a curved discharge path is constituted by a plurality of bulbs and a cap interconnecting end portions of the bulbs. Terminal electrodes are provided at end portions of the bulbs, which are situated at both ends of the discharge path. An intermediate electrode is arranged within the cap. A voltage is applied selectively between the intermediate electrode and the terminal electrodes, thereby selectively enabling the bulbs to emit light. The bulbs may have apertures having different widths and positions. Different types of phosphor layers may be formed on the inner surfaces of the bulbs, thereby selectively emitting light of different wavelengths.

REFERENCES:
patent: 2102190 (1937-12-01), Barclay
patent: 2267118 (1941-12-01), Marden
patent: 4208618 (1980-06-01), Heine
patent: 4335331 (1982-06-01), Watanabe et al.
patent: 4524301 (1985-06-01), Cohen et al.
patent: 4665341 (1987-05-01), Imamura et al.
patent: 4695763 (1987-09-01), Ogasawara et al.
patent: 4743799 (1988-05-01), Loy
patent: 4961024 (1990-10-01), Kodama et al.

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