Image display apparatus
US7903323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2010 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Feb 1, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1671
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image display apparatus comprising two substrates at least one of which is transparent, ribs for maintaining a distance between the substrates and display particles that are sealed between the substrates in a powder state, and displaying an image by generating an electric field between the substrates so that the display particles are moved,wherein of contact faces to the display particles in the gap between the substrates, at least the contact faces of ribs to the display particles have an arithmetic average roughness Ra in a range from 0.01 to 0.20 μm and an average interval Sm of irregularities in a range from 0.5 to 2.5 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.