Alignment film for LCD using photoreactive polymer and LCD comprising the same
US7541073B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2006 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Jul 3, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a composition for forming a liquid crystal alignment film, which comprises a photoreactive polymer including a multicyclic compound having a photoreactive group on a main chain thereof. The present invention also provides a liquid crystal alignment film produced using the composition, and a liquid crystal display including the liquid crystal alignment film. The photoreactive polymer including the multicyclic compound on the main chain thereof has a high glass transition temperature, thus thermal stability is excellent. Since lattice vacancy is relatively large, the photoreactive group is capable of moving relatively freely in the main chain of the polymer, thus it is possible to improve a slow photoreaction rate, which is considered a disadvantage of a conventional polymer material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.