Broadband reflection type brightness enhancement polarizer and liquid crystal display having the same
US7510748B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2006 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Apr 18, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/031
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a broadband reflection type brightness enhancement polarizer, which includes a cholesteric liquid crystal film laminate having a broadband selective reflecting wavelength range in which a plurality of cholesteric liquid crystal films having selective reflecting wavelength ranges different from each other by having different mixture ratios of a curable nematic liquid crystal compound expressed by the chemical formula 1 and a curable chiral compound expressed by the chemical formula 2 are laminated; and a film having ¼λ phase difference laminated on one surface of the cholesteric liquid crystal film laminate. This polarizer has wide selective reflecting wavelength ranges of the cholesteric liquid crystal films composing the polarizer, so the entire visible ray range can be covered just by laminating several cholesteric liquid crystal films. Accordingly, the polarizer may be manufactured relatively thinner, so the brightness can be greatly improved when the polarizer is applied to a liquid crystal display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.