Chiral doping agents with variable spiral pitch induction and application thereof to a reflective color display
US6680003B2 · kind B2 · utility
3Cited by
0References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2001 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Jun 21, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention concerns chiral doping agents allowing a modification to be induced in the spiral pitch of a cholesteric liquid crystal, said doping agents including a biactivated chiral unit at least one of whose functions allows a chemical link to be established with an isomerisable group, for example by radiation, said group possibly having a polymerisable or co-polymerisable end chain. These new chiral doping agents find application in particular in a color display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.