Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1994-12-02
1996-07-16
O'Shea, Sandra L.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313492, 313613, 313600, 313609, H01J 162, H01J 1702, H01J 1730
Patent
active
055369995
ABSTRACT:
A flat planar fluorescent lamp having barrier structures overlaying the electrodes is described. The barrier structures include barrier walls and platforms between the electrodes and the lamp cover with passageways between the platforms and the lamp cover. The barrier structures cause the electric discharge between the lamp electrodes to pass between the platforms and the lamp cover. The interior of the lamp and the top of the platform are coated with a fluorescent material such that the lamp produces light throughout its interior, including the region directly above the electrode, thereby providing a source of light in an area which would otherwise be a dark region surrounding the electrode. In one embodiment, a cold electrode, a hot electrode, an ion barrier, and a tubulation are formed in a glass seal as a single unit, placing the terminals of the electrodes and the tipped-off tubulation in a small region of the lamp to permit easier access and alignment. Two tubulations are used to permit the lamp to be pumped at locations adjacent the two electrodes to reduce problems associated with free ions in the region around the electrode. In one embodiment, a metal lamp body having an insulative coating and including an integral barrier structure is formed using conventional metal stamping techniques. In another embodiment, the lamp body is formed from glass which is shaped according to known techniques to form an integral barrier wall. The platform is then attached to the integral barrier wall and supported at its sides by ledges formed in the sidewall and channel wall of the lamp.
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Ning John
O'Shea Sandra L.
Winsor Corporation
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