发明名称 |
Switchable pulldown film projection system |
摘要 |
A switchable pulldown film projection system comprising a film transport system for transporting film through a projector. The film transport system has a plurality of sprockets with teeth for engaging perforations on the film, and a pair of motors that rotate the sprockets and move the film in a frame-by-frame manner past an aperture in the projector. The motors are controlled by an electronic controller that changes the rotational output of the motors based on a signal related to the format of the film in terms of the number of perforations spanned by each frame on the film. The controller enables the system to switch between a variety of different film formats, on the same projector and on the same strip of film, without substantially interrupting or delaying operation of the projector.
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申请公布号 |
US5946076(A) |
申请公布日期 |
1999.08.31 |
申请号 |
US19960598033 |
申请日期 |
1996.02.07 |
申请人 |
MAXIVISION CINEMA TECHNOLOGY |
发明人 |
GOODHILL, DEAN K.;BEHRNS, DON P. |
分类号 |
G03B1/24;G03B21/48;(IPC1-7):G03B21/48 |
主分类号 |
G03B1/24 |
代理机构 |
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代理人 |
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主权项 |
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