Bistable twisted nematic mode reflective liquid crystal display
US6469768B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1999 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Apr 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display includes front and rear insulating substrates, each having inner and outer surfaces. The inner surface of the rear substrate faces the inner surface of the front substrate. A transparent electrode is formed on the inner surface of the front substrate, and a mirror electrode made with a reflective material is formed on the inner surface of the rear substrate. A polarizer is attached on the outer surface of the front substrate, and homogeneously aligning films are coated on the transparent and the mirror electrodes, followed by rubbing unidirectionally. A liquid crystal layer is interposed between the homogeneously aligning films on the two substrates. The liquid crystal layer is composed of a nematic liquid crystal material which has positive dielectric anisotropy and a chiral dopant to have a twisted structure. The molecular director in the liquid crystal layer is initially in the &pgr;-twisted state. When a high reset voltage is applied to the liquid crystal display, the molecular director is rearranged in a homeotropically deformed state. A selection voltage lower than the reset voltage is applied to obtain one of the zero-twisted state and the &pgr;-twis…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.