Fluorescent lamp with external electrode housing and method for

Details Fluorescent lamp with external electrode housing and method for Fluorescent lamp with external electrode housing and method for

1997-06-26

1998-12-15

O'Shea, Sandra

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313491, 313631, 313633, 313634, H01J 162, H01J 6304, H01J 1704, H01J 6104

Patent

active

058501223

ABSTRACT:
A planar fluorescent lamp employing both hot cathode and cold cathode operation is described. The lamp includes a first transparent cover bonded atop a metal body with a serpentine channel therein. The lamp body is coated with an insulative coating and the glass solder bead bonds the cover to the lamp at its perimeter and along the ridges defining the serpentine channel. An alternative embodiment of the lamp includes a second transparent cover bonded above the first transparent cover enabling the fluorescent material to be contained in a second enclosure, isolated from the source of light energy. A second alternative embodiment conceals the electrodes of the lamp beneath the lamp body and provides plasma slots to allow the concealed electrodes to energize the lamp. Another alternative embodiment utilizes a conductive transparent coating on the lamp cover to allow the lamp cover to supplement the lamp body as a cold cathode.

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