Method and apparatus for electronic switching of a reflective color display
US5251048A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1992 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | May 18, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0486
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light modulating apparatus comprising a liquid crystal light modulating material confined between substrates, elongated electrically-conductive paths supported on opposite sides of the light modulating material by the substrates and a pair of gating systems for supplying voltage pulses to the electrically conductive paths for addressing the light modulating material is disclosed. The light modulating material includes polydomains of polymer network dispersed in a chiral nematic liquid crystal having positive dielectric anisotropy. This material is confined by the substrates between inner surfaces treated to promote homogeneous alignment of the liquid crystal near the inner surfaces. The apparatus provides energy efficient passive control of a bistable light modulating material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.