Raster image processor for all points addressable printer
US5237655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1990 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Jul 5, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A raster image processor for an all points addressable printer includes at least three digital computer controlled processing units arranged in a parallel processing pipe line. The first unit is a master processing unit that receives printing instructions and generates rendering commands. The record unit is connected to the first unit by a dedicated bus, and receives the rendering commands over the bus and generates bit maps corresponding to the rendering commands. The third unit is a memory unit connected to the second unit by a second dedicated bus, and receives the bit maps from the second unit and stores them in a page memory. All three units are connected by a communications and control bus for overall coordination of the units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.