Optical wave guide driven liquid crystal display employing optical switching for input
US5589961A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | May 24, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12038
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical wave guide, an optical input device, fabrication methods thereof, and a liquid crystal display apparatus using the optical wave guide and optical input device are disclosed. The optical wave guide includes: a core region having a refractive index n.sub.c through which an optical signal is transmitted; and a cladding layer in which low refractive index layers having a refractive index n.sub.1 and high refractive index layers having a refractive index n.sub.h are alternately deposited. A side face of the core region is covered with the cladding layer, and the refractive indices satisfy conditions of n.sub.1 <n.sub.h, and n.sub.1 <n.sub.c. The optical input device includes: a transparent substrate; the optical wave guide formed in the transparent substrate; an optical input portion; and a plurality of optical output portions for connecting a side face of the optical wave guide to a surface of the transparent substrate. The optical signal from the optical input portion is transmitted through the optical wave guide and output from the optical output portions to the outside of the transparent substrate. The liquid crystal display apparatus includes: a display medium; a plurali…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.