Character recording device
US4251821A · kind A · utility
15Cited by
8References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 11, 1979 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Oct 11, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/1204
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A dot character recording device in which a recording surface is scanned with a laser beam modulated in accordance with the dot patterns of characters to be recorded. The time width of the modulating signal is adjusted in accordance with the beam position in order to maintain a constant scanning line and hence character dot width. Preferably, the pulse width of the modulating signal is increased in the scanning direction at recording positions where the density of the beam would otherwise be low so as to apply additional optical energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.