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US4437122A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1981 |
| Grant date | Mar 13, 1984 |
| Priority date | — |
| Expiry date | Sep 12, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0091
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention enhances the resolution and quality of characters of a system receiving the information initially in the form of video display pixels and providing hard copy output. This is accomplished by storing at least three successive lines of video data in successive, parallel connected shift registers, applying the outputs of the shift registers to a decoder, and generating driving signals for the printer head. The decoder compares the pixels on the same line as well as in preceeding and succeeding lines that surround each specific input pixel to generate the printer head driving signals according to whether straight or curved line segments are to be formed. In effect, the printer increases the density of the information elements and simultaneously provides rounding off of character edges and smoothing of diagonals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.