Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Patent
1995-03-16
1996-11-12
Bell, Janyce
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
427157, 427162, 427266, 427282, 427404, 4274193, B05D 506
Patent
active
055738079
ABSTRACT:
The present invention is for improved thick film electroluminescent lamps and displays which provide a moisture barrier for the phosphor layer of the electroluminescent lamp and allows all of the contacts for the lamp or the display to reside within the footprint of the lamp. The moisture barrier is provided without employing a pair of encapsulating polymer sheets. The resulting lamps and displays are provided with vias which allow leads to be attached to a front electrode and one or more back electrodes employed to provide a potential across a phosphor layer therebetween causing the phosphor to emit light. A second dielectric layer is deposited over the underlying architecture of the lamp or display and forms a seal with an exposed continuous phosphor free band of the front electrode, which surrounds the perimeter of the lamp and also seals with a phosphor free contact region at the bottom of the via which it passes down. The second layer also seals any passages provided which traverse the lamp or display. The present invention also describes a method for fabrication of such electroluminescent lamps and displays.
REFERENCES:
patent: 5074817 (1991-12-01), Song
patent: 5156924 (1992-10-01), Taniguchi et al.
Bell Janyce
Leading Edge Industries, Inc.
Weins Michael J.
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