TRIAZINE RING BASED POLYMERS FOR PHOTOINDUCED LIQUID CRYSTAL ALIGNMENT, LIQUID CRYSTAL ALIGNMENT LAYER CONTAINING THE SAME, LIQUID CRYSTAL ELEMENT USING THE ALIGNMENT LAYER AND METHOD OF MANUFACTURING THE SAME
US7067566B2 · kind B2 · utility
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3References
14Claims
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Key dates
| Filing date | Nov 11, 2002 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | Oct 1, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Triazine ring based polymers for photoinduced liquid crystal alignment introduces photoactive groups for inducing, reinforcing, improving and preserving liquid crystal alignment, for example photoreactor such as cinnamate, coumarin, chalcone and maleimide, as a chain to have at least one photoactive group. One of the photoactive groups can experience Fries rearrangement which induces liquid crystal alignment, and other groups can experience photodimerization, photoisomerization, photocrosslinkng or photodegradation to reinforce, change or preserve the generated alignment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.