Light pipe valve liquid crystal transmissive display for direct imaging on photosensitive materials
US4297022A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1979 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Dec 3, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F9/305
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal light pipe display for direct imaging onto photosensitive materials, having a non-conductive, transparent first sheet and a non-conductive substantially opaque second sheet, each having substantially planar inner and outer surfaces. The non-conductive sheets are disposed adjacent to one another with their inner surfaces opposing one another in spaced-apart relationship separated by a sealed-in, normally transparent, liquid crystal material. The non-conductive sheets each have a transparent conductive electrical coating disposed on their inner surface, of a plurality of discrete character forming segments with means connected thereto for electrically coupling said segments to an external power source. The second non-conductive sheet has a plurality of discrete transparent light pipes formed therethrough, each of which are aligned with one of said character forming segments. First and second linear polarizer sheets are secured to the outer surface of said first non-conductive sheet and to the outer surface of the second non-conductive sheet. When the adjacent character forming segments are actuated by the power source, light from an external light source is transmitt…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.