Electroluminescent lamp devices using monolayers of electroluminescent materials
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United States of America Patent
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Feb 20, 1990
Grant Date -
N/A
app pub date -
Dec 31, 1987
filing date -
Dec 31, 1987
priority date (Note) -
Expired
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Abstract
An electroluminescent (EL) lamp element and a process for making same. The EL lamp element has a monolayer of phosphor particles deposited in a resin binder material. The sizes of the particles are controllably pre-selected to lie within a selected range thereof. The thickness of the resin binder layer is about one-half that of the average particle size so that the tendency of the resin to migrate through the particles and to cover the surfaces of the particles is prevented. A second resin binder layer is then deposited over the exposed surfaces of phosphor particles to form a relatively thin monolayer of particles uniformly distributed in the resin binder layers. If desired, the particles can be coated with a colloidal silica material to prevent any agglomeration thereof when depositing them in the resin binder layer.
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