IMAGE PICKUP DEVICE

PURPOSE:To reduce a time required for image pickup, to remarkably increase the number of consecutive image pickup frames, and to extend the service life of a camera by closing a shutter when the exposure light quantity of a solid-state image pickup element arrives at required light quantity. CONSTIT...

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Bibliographic Details
Main Author KONDO KENICHI
Format Patent
LanguageEnglish
Published 25.05.1993
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEMICONDUCTOR DEVICES
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Summary:PURPOSE:To reduce a time required for image pickup, to remarkably increase the number of consecutive image pickup frames, and to extend the service life of a camera by closing a shutter when the exposure light quantity of a solid-state image pickup element arrives at required light quantity. CONSTITUTION:Light is made incident on the solid-state image pickup element 13 by the aperture of the shutter, and photoelectric conversion is performed by a photodiode 21 and a vertical transfer CCD 22, and an electric charge generated in the photodiode 21 is accumulated in each diode. Thence, the electric charge swept out to a drain 25 is integrated at a drain current integrator 11. When the output of the integrator 11 arrives at a reference value as appropriate light quantity, it is supplied to a comparator 12, and a system controller 9 outputs a closing signal for the shutter.
Bibliography:Application Number: JP19910311374