Electronic color printing system
US4977411A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Nov 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04786
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A line-at-a-time printer is realized by directing a collimated light beam through an interaction area of an electro-optic light modulator while successive sheets of data samples are sequentially applied to electrodes positioned across the width of the modulator. A modulated line latent image is formed on the surface of a photoreceptor, the photoreceptor being indexed to create successive exposed, modulated line images on its surface. Electronic registration control of successive images, for example in a color printing process, is achieved by a control system which triggers the light beam source between the time interval during which data signals are loaded into the modulator. In one embodiment the pulse sourcing is accomplished through a feedback loop which includes a sensor for monitoring movement of the photoreceptor and application of the light source pulses and the data samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.