Frame-rate converting film scanner with two-dimensional solid state image sensing array
US4338634A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Nov 17, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/38
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A frame-rate converting film scanner includes means for continuously advancing film at a selected frame rate and for projecting an image of the moving film onto a solid state image sensor for producing a television signal at a standard television field rate. The solid state image sensor includes: (1) a two-dimensional array of image sensing elements having a width equal to the width of the projected image of a film frame and a height equal ot the projected image of 2+X/Y film frames, where X is the projection rate of the film in frames per second and Y is the field rate of the standard video signal in fields per second, (2) a two-dimensional frame storage array, (3) an output register, and (4) a "drain gate" disposed between the image sensing array and the frame storage array and operable in a first mode to transfer signals from the image sensing array to the storage array and in a second mode to drain signals from the image sensing array. The image of the moving film is projected on the image sensing array to produce an imagewise pattern of photocharge and the sensing array is operated to move the pattern of photocharge accumulated in the array in synchronism with the moving image…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.