Patent · US Expired

Modified polysugar as the alignment layer for liquid-crystal displays

US5405552A · kind A · utility

9Cited by

4References

9Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Dietmar Jungbauer · Weiterstadt, DE
Norbert Rosch · Frankfurt am Main, DE
Javier Manero · Frankfurt, DE

Key dates

Filing date	Aug 9, 1993
Grant date	Apr 11, 1995
Priority date	—
Expiry date	Aug 9, 2013

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/141
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Modified polysugar as an alignment layer for liquid-crystal displays An alignment layer for liquid-crystal displays (LCDs) contains PA1 a) at least one oligomer/polymer of a 6-membered cyclic sugar unit all or some of whose free OH groups may be derivatized and which carries equatorial substituents in the 2-, 3- and 6-positions on the ring, and PA1 b) at least one compound from the group consisting of macrocyclic compounds, cryptands, coronands, podands, mercapto compounds and ionophores. LCDs which contain an alignment layer according to the invention are particularly distinguished by good contrast and bright-transmission values and by good alignment of the liquid crystal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.