Liquid crystalline medium and liquid crystal device
US9650573B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2014 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/3422
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates a liquid crystalline medium comprising one or more liquid crystalline compounds, one or more dichroic dyes, and one or more compounds capable of promoting or inducing homeotropic alignment to the adjacent liquid crystal medium at a given temperature selected from the group of compounds (A), having a three-dimensional structure, a molecular weight of greater than 450 Da, and one or more anchor groups, or the group of organic compounds (B) having one or more ring groups, and one or more anchor groups.The invention furthermore relates to a temperature-reactive device for the regulation of light transmission, containing such liquid crystalline medium, and a process for the temperature-dependent control of light transmission through the layer of such liquid-crystalline medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.