Optical compensation films with birefringence enhancing substituents for liquid crystal display
US8304079B2 · kind B2 · utility
3Cited by
14References
96Claims
0Family size
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Key dates
| Filing date | Mar 29, 2007 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Oct 1, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Optical compensation films (positive C-plate) with anisotropic subunits (OASUs) that are aromatic rings substituted with birefringence enhancing substituents (BES) and have high positive birefringence throughout the wavelength range 400 nm<λ<800 nm are provided. The optical compensation films may be processed by solution casting to yield a polymer film with high birefringence without the need for stretching, photopolymerization, or other processes. Such optical compensation films are suitable for use as a positive C-plate in LCDs, particularly IPS-LCDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.