US PATENT SUBCLASS 313 / 498
.~ Solid-state type

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.~ Solid-state type {8}
499  DF  .~.~> Semiconductor depletion layer type {2}
502  DF  .~.~> With phosphor embedding material
503  DF  .~.~> With particular phosphor or electrode material {1}
505  DF  .~.~> With electrode matrix
506  DF  .~.~> Plural layers {3}
510  DF  .~.~> With character display (e.g., digits or letters)
511  DF  .~.~> Flexible
512  DF  .~.~> With envelope or encapsulation

DEFINITION

Classification: 313/498

(under subclass 483) Subject matter in which the luminescent material is an insulating material that emits light based on the principle of intrinsic luminescence, i.e., where an applied electric field generates free carriers in the device (since the material, being an insulator, has no free carriers to be accelerated by the applied field) to initiate light emission mechanism(s) in the material, or other solid-state material (e.g., semiconductor) which either operates by a mechanism not `elsewhere classified, or only nominally recites a mechanism (e.g., injection luminescence) elsewhere classified.

(1) Note. Intrinsic luminescence is to be distinguished from injection luminescence, the latter being the mechanism of operation of incoherent luminescent active solid state devices which are properly classified as ORs in Class 257. Typical injection luminescence devices include pn junctions (including), Schottky barriers, metal-insulator-semiconductor (MIS) structures, and traveling high speed domains, e.g., Gunn domain and acoustoelectric wave generated domains.

(2) Note. When structural details of an incoherent light emitting injection solid-state type luminescent element are claimed, classification as an original (OR) is in Class 257.

(3) Note. When structural details of a coherent light emitting solid-state type luminescent element are claimed, classification as an original (OR) is in Class 372.

SEE OR SEARCH CLASS

257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),

10, 11, 21, 53-56, 113-118, 184-189, 225-234, 257, 258, 290-294, and 414-466 for radiation-sensitive active semiconductors injection luminescent devices, and subclasses 613+ for active semiconductor injection luminescent devices containing group II-VI compounds.