Control system for aspect ratio and magnification of a raster output scanner
US5530642A · kind A · utility
12Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Nov 14, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/1135
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A control system for a ROS scanner in which the aspect ratio and magnification of an image is controlled by precise, real-time control of the relative velocities of the polygon mirror and the photoreceptor. Values related to monitored measurements of polygon mirror and photoreceptor velocity are mathematically combined with a reference clock value and other factors to yield real-time control signals. The control signals operate the polygon and photoreceptor motors to obtain a desired magnification and aspect ratio of images created on the photoreceptor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.