Electroluminescent display with interlayer for improved forming
First Claim
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1. An electroluminescent display, comprising:
- a substantially transparent nonconductive substrate means;
at least one substantially transparent conductive first electrode means disposed on said substrate means;
a substantially transparent insulative interlayer means disposed on said substrate means and said first electrode means;
powder phosphor means disposed over said interlayer means; and
at least one conductive second electrode means disposed over said phosphor means;
said interlayer means having a uniform thickness for breaking down and passing a uniform current to uniformly heat an adjacent portion of said phosphor means in response to an electrical forming voltage applied between said first and second electrode means; and
said phosphor means having means for forming a substantially transparent luminescent film in response to said electric forming voltage and the heating provided by said interlayer means.
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Abstract
An electroluminescent D.C. display panel has a transparent substrate, transparent anodes, a metal oxide interlayer, an electroluminescent powder phosphor, and cathodes formed in stacked relation on the substrate. The metal oxide interlayer allows the panel to be formed relatively quickly at substantially reduced forming currents.
30 Citations
35 Claims
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1. An electroluminescent display, comprising:
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a substantially transparent nonconductive substrate means; at least one substantially transparent conductive first electrode means disposed on said substrate means; a substantially transparent insulative interlayer means disposed on said substrate means and said first electrode means; powder phosphor means disposed over said interlayer means; and at least one conductive second electrode means disposed over said phosphor means; said interlayer means having a uniform thickness for breaking down and passing a uniform current to uniformly heat an adjacent portion of said phosphor means in response to an electrical forming voltage applied between said first and second electrode means; and said phosphor means having means for forming a substantially transparent luminescent film in response to said electric forming voltage and the heating provided by said interlayer means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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11. An electroluminescent matrix display, comprising:
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a substantially transparent substrate; a plurality of spaced parallel substantially transparent conducting anodes disposed on said substrate; a plurality of spaced parallel conducting cathodes disposed over said anodes in perpendicular spaced relation to the anodes; electroluminescent phosphor means disposed between said anodes and cathodes at crossover points of the anodes and cathodes, said phosphor means contacting said cathodes; and an insulative film disposed between and contacting said anodes and said phosphor means and having a uniform thickness and composition for facilitating forming of said electroluminescent phosphor means, said film selected from the group consisting of aluminum oxide, magnesium oxide, magnesium fluoride, yttrium oxide, and zinc sulfide. - View Dependent Claims (12, 13)
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Specification