Film transportation display device
US4432628A · kind A · utility
13Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1982 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Aug 23, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
When the film is being transported, a signal forming circuit produces a pulse signal. Based on this pulse signal, a prescribed plurality of signals are formed and applied to a decoder driver so that a plurality of displaying areas positioned side by side in a display are actuated successively in one direction. As the displayed pattern appears to flow, the camera operator is able to recognize that film transportation is in progress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.