Method of manufacturing an image display medium capable of displaying an image repeatedly, and image display medium capable of displaying an image repeatedly
US6836304B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2001 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Mar 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G17/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of manufacturing an image display medium for encapsulating powdered display elements uniformly between opposed substrates, and an image display medium. Spacer particles are formed in a grid pattern on a first flat substrate pulled out from a first film roll by a first electrostatic application apparatus, and spacers are formed on the first flat substrate by fixing by a first fixer. Then, black particles are applied on the entire surface by a second electrostatic application apparatus, and then white particles are applied on the entire surface by a third electrostatic application apparatus. Subsequently, black particles and white particles are removed from each upper surface of the spacers by a blade, and a second flat substrate pulled out from a second film roll is superimposed thereon, and each upper surface of the spacers is fixed to the second flat substrate by a second fixer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.