Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Hitachi Ltd
Original Assignee
Hitachi Ltd
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Filing date
Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP11746375ApriorityCriticalpatent/JPS5241532A/en
Publication of JPS5241532ApublicationCriticalpatent/JPS5241532A/en
PURPOSE: To provide a film projection device which can maintain an image in a bright state, even though at the time of light blocking due to a shutter.