Single layer multi-state ultra-fast cholesteric liquid crystal device and the fabrication methods thereof
US6674504B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Dec 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13775
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A device and method of manufacturing a single layer multi-state ultra-fast cholesteric liquid crystal includes two optically transparent states with a liquid crystal arranged therebetween, and changing the optical states of the liquid crystal ranging from one state to any combination of broadband reflection, tunable narrow band reflection, light scattering, and transparency in accordance with a voltage applied to the device. A surfactant can be added to reduce the response time and a dichroic dye may be added to include the property of light absorption and reduce the bandwidth. The device can provide any and all of the aforementioned optical states for infrared light, visible light, and ultra-violet light. The desired outputs can be formed according to need, so that predetermined optical states can operate with either no voltage or a particular voltage or voltage range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.