Red colored film, red colored composition, color filter and liquid crystal display device
US7763672B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 29, 2006 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Jun 19, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/031
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A red-colored film in which when an elliptically polarized light is incident on the film in a direction 45° aslant from a normal line direction with respect to a surface of the film, a light transmitted through the film has an average amplitude transmittance ratio (av. tan Ψ) in a wavelength region of 575 to 635 nm, which satisfies the following equation (1):0.960<av. tan Ψ<1.040 (1).A red-colored composition contains a red pigment A having a BET specific surface area in the range from 90 to 140 m2/g, a red pigment B having a BET specific surface area in the range from 70 to 85 m2/g, and a pigment carrier formed of a transparent resin, a precursor of the transparent resin or a mixture of the tarns parent resin and precursor thereof. A color filter has the red-colored film as a red color filter segment. The liquid crystal display device includes the color filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.