Flexoelectro-optic liquid crystal device
US8330931B2 · kind B2 · utility
5Cited by
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32Claims
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Key dates
| Filing date | Jul 4, 2005 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Mar 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13775
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for controlling the polarization state of transmitted light comprises first and second cell walls enclosing a layer of a chiral liquid crystal material. The material has a uniformly orientated helical axis in the absence of an applied field, and electrodes for applying an electric field substantially normal to the helical axis. An applied electric field flexoelectrically couples to the molecules, causing distortion of the helical structure and hence changes the bulk birefringence of the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.