Apparatus for making a screen reproduction of an image
US4012584A · kind A · utility
38Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1975 |
| Grant date | Mar 15, 1977 |
| Priority date | — |
| Expiry date | Jan 29, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In apparatus for making a half-tone reproduction of an image and having a row of light source elements which together expose a line across a component screen area of a film to be exposed, screen-representing signals are electronically generated when pulses exist in corresponding locations of a pair of shift register devices having trains of pulses moving in opposite directions. Each shift register device may comprise a pair of shift registers having trains of pulses moving in the same direction, the relative phase of the pulse trains in the two shift registers varying with the picture signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.