Bistable polymer dispersed cholesteric liquid crystal displays
US6061107A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | May 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1334
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Polymer/cholesteric liquid crystal dispersions are provided in which the liquid crystal phase separated from the polymer matrix to form droplets. The cholesteric liquid crystals were positive dielectric anisotropic. At a zero field condition, the liquid crystal in the droplets was bistable, that is, the liquid crystal can be in either the reflecting planar state or the scattering focal conic state. When the liquid crystal 101 was in the planar texture, the helical axis of the liquid crystal was more or less perpendicular to the cell surface; colored light 105 was Bragg reflected. When the liquid crystal 101 was in the focal conic texture, the helical axis was more or less parallel to the cell surface, incident light was scattering 106 in the forward direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.