OVERHEAD PROJECTOR

PROBLEM TO BE SOLVED: To magnifiable and projectable not only an opaque original but also a transmissible original in high articulation. SOLUTION: The image of an original 1 placed on a transparent original platen 4 so as to face down is picked up by a camera 7. The transmissible original 1 is light...

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Bibliographic Details
Main Author TOYA KIYOTAKA
Format Patent
LanguageEnglish
Published 11.08.2000
Edition7
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CALCULATING
CINEMATOGRAPHY
COMPUTING
COUNTING
ELECTROGRAPHY
HOLOGRAPHY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To magnifiable and projectable not only an opaque original but also a transmissible original in high articulation. SOLUTION: The image of an original 1 placed on a transparent original platen 4 so as to face down is picked up by a camera 7. The transmissible original 1 is lighted by an original illumination 5, and also the back surface of the original 1 is lighted by a backlight unit 16 provided at an original cover 3. A picture signal from the camera 7 is inputted to a projection type display device 12, so that the content of the original 1 is projected on a screen. Lookup tables 9a and 9b for gamma correction are switched by a changeover switch 10 in the case of the opaque original and in the case of the transmissible original.
Bibliography:Application Number: JP19990024817