US PATENT SUBCLASS 349 / 50
.~.~.~.~ Diode

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

19  DF  PARTICULAR EXCITATION OF LIQUID CRYSTAL {6}
33  DF  .~ Electrical excitation of liquid crystal (i.e., particular voltage pulses, AC vs. DC, threshold voltages, etc.) {8}
41  DF  .~.~ With particular switching device {2}
49  DF  .~.~.~ Two terminal nonlinear switching device (e.g., N-I-N, S-I-S, Ferroelectric, etc.) {3}
50.~.~.~.~ Diode

DEFINITION

Classification: 349/50

Diode:

(under subclass 49) Subject matter wherein the switching device has a rectifying function.

(1) Note. Excluded from this subclass are photodiodes used for optically exciting the liquid crystal. For such excluded subject matter, see SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

25, and 28, for using photodiodes for optically exciting a liquid crystal cell.

SEE OR SEARCH CLASS

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

91, for using diodes in a liquid crystal device.