US PATENT SUBCLASS 349 / 132
.~.~.~.~ For parallel alignment

Current as of: June, 1999
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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

56  DF  PARTICULAR STRUCTURE {7}
84  DF  .~ Having significant detail of cell structure only {17}
122  DF  .~.~ Particular nonoptical film or layer (e.g., adhesive layer, barrier layer) {3}
123  DF  .~.~.~ Alignment layer {6}
132.~.~.~.~ For parallel alignment {2}
133  DF  .~.~.~.~.~> With chiral smectic liquid crystal (includes ferroelectric liquid crystal) {2}
136  DF  .~.~.~.~.~> With particular pretilt angle (i.e., with liquid crystal other than chiral smectic)

DEFINITION

Classification: 349/132

For parallel alignment:

(under subclass 123) Subject matter wherein the alignment layer causes the liquid crystal molecules to be oriented homogeneously or substantially parallel to a supporting surface (i.e., substrate).

(1) Note. This alignment is sometimes caused by rubbing or otherwise forming grooves in the surface of the layer.

(2) Note. This type of alignment is typically found in conjunction with the twisted nematic field effect type liquid crystal devices.