Method and control system architecture for controlling tone reproduction in a printing device
US5471313A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1993 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Feb 24, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B15/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A controls system architecture for an image output terminal (IOT) has a hierarchical structure which isolates subsystem controls for purposes of efficient algorithm design, analysis and implementation. The architecture is preferably divided into three levels and has a controls supervisor which provides subsystem isolation functions and reliability assurance functions. The architecture improves image quality of IOT outputs by controlling the operation of the IOT to ensure that a toner reproduction curve of an output image matches a tone reproduction curve of an input image, despite several uncontrollable variables which change the tone reproduction curve of the output image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.