Dot matrix character printing using constrained memory
US4458333A · kind A · utility
21Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1981 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Dec 21, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0031
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a wire matrix printer control system, some characters from a finite alphabet are locally stored as compressed dot matrix objects reflectively symmetric about at least one axis. Upon being referenced and ascertained as a compressed object, the bits are applied to the printhead in column major order up to the axis of symmetry and then applied in reverse column major order. For uncompressed objects, the bits are applied only in column major order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.