US PATENT SUBCLASS 313 / 506
.~.~ Plural layers

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

483  DF  WITH LUMINESCENT SOLID OR LIQUID MATERIAL {4}
498  DF  .~ Solid-state type {8}
506.~.~ Plural layers {3}
507  DF  .~.~.~> With photosensitive layer
508  DF  .~.~.~> With piezoelectric layer
509  DF  .~.~.~> With dielectric layer

DEFINITION

Classification: 313/506

(under subclass 498) Subject matter including more than one layer of material disposed between two electrodes and wherein one of the layers is luminescent.

(1) Note. The plural layers may, for example, be two or more luminescent layers.