Magnetic display unit
US4750003A · kind A · utility
3Cited by
2References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1987 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Aug 31, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F9/375
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic display unit in which a magnetic panel encloses a colored liquid in which magnetic particles are dispersed. A recording head moves over the panel and has a plurality of electromagnets arranged with at least three electromagnets on each of parallel lines inclined to the direction of movement of the recording heads with all the electromagnets being arranged on equal pitch perpendicular to this movement direction. The electromagnets are selectively actuated as the recording head moves to write a dot pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.