Optically anisotropic film, brightness increasing film, laminated optical film, and image display device using the same
US7755728B2 · kind B2 · utility
7Cited by
4References
7Claims
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Key dates
| Filing date | Mar 29, 2006 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Jan 27, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/03
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optically anisotropic film comprising a liquid crystal compound forming a nematic phase or smectic A phase, the liquid crystalline phase satisfying the following inequality:Δn(450 nm)/Δn(550 nm)<1.0in which each Δn (λ) represents an intrinsic birefringence at a wavelength of λ, wherein the optically anisotropic film (A) has an absolute in-plane retardation (Re) of 40 nm or less and a retardation in the thickness direction (Rth) of −10 nm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.