Unipolar drive for cholesteric liquid crystal displays
US6710760B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2000 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Sep 7, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reflective memory display is disclosed which includes: a flexible polymeric substrate; a patterned first conductor disposed over the substrate; and a layer including a polymeric dispersed cholesteric liquid crystal material coated over the first patterned conductor. The memory display further includes a patterned second conductor disposed over the polymeric dispersed cholesteric liquid crystal; and control means for repeatedly applying selective unipolar voltages across particular portions of the patterned first and second conductors to cause electric fields which are applied to portions of the polymeric dispersed cholesteric liquid crystal layer to change its reflectance thereby presenting a series of different reflectance images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.