Photoactive propane derivatives and orientation layers
US6653499B1 · kind B1 · utility
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12Claims
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Key dates
| Filing date | Jun 7, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jun 7, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133711
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of formula (I) may be used as alignment layers in liquid crystal devices wherein X1-5 are idependently selected from H, F, CN, phenylene, C1-10 alkyl, whereby when X1=X2, then X1,2=H and when X3=X4, then X3,4=H, S1-3 are spacer units, PG1-3 are photoisomerisable/dimerisable groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.