Chiral additives for cholesteric displays
US6830789B2 · kind B2 · utility
84Cited by
6References
30Claims
0Family size
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Key dates
| Filing date | Sep 24, 2001 |
| Grant date | Dec 14, 2004 |
| Priority date | — |
| Expiry date | Sep 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13718
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A unique class of chiral additive materials is disclosed for use in cholesteric displays that possess a helical twist power substantially independent of temperature. The additives have a solubility and a helical twist power large enough to be used as a single chiral component with little dilution of the physical properties of the nematic liquid crystal host mixture. The chiral additives may be used in combination with non-chiral additives to provide a helical twisting power substantially independent of temperature suitable for cholesteric displays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.