Diagonally offset, dielectric anisotropy inversion, liquid crystal, microshutters
US4671616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1986 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Mar 10, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/1252
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal optical device including a plurality of optical shutters is provided. The optical device includes a first glass substrate having N common electrodes disposed thereon and a second glass substrate having N signal electrodes disposed thereon, the glass substrates spaced apart and opposed to each other so that the electrodes are crossed. A liquid crystal material including a nematic liquid crystal having dielectric anisotropy which becomes 0 at a crossing frequency (fC) of 100 KHz or below at atmospheric temperatures including a optically active material encapsulated between the glass substrates. Polarizing plates are disposed on the outside of the liquid crystal panel and the device is driven in a N time-sharing mode by applying the driving signals to the common electrode and the signal electrodes. The optical device is particularly well suited for use in an optical printer in view of the rapid response times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.