Color image forming apparatus comprising ferroelectric smectic liquid crystal having at least two stable states
US4712878A · kind A · utility
17Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Jan 16, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/141
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image-forming apparatus, comprising: a liquid crystal cell comprising an electroconductive member, an electric charge-accepting member, and a ferroelectric liquid crystal interposed therebetween; charging means for imparting an electric charge to the electric charge-accepting member sufficient to form an electric field exceeding the threshold voltage of the ferroelectric liquid crystal; and a multi-color optical filter disposed in the neighborhood of the electroconductive member and comprising a plurality of filter elements of which adjacent ones have mutually different spectral characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.