Image sensing apparatus having exposure level and

专利名称：Image sensing apparatus having exposure

level and dynamic range control circuit

发明人：Yasuhiro Komiya,Takeshi Mori,Tatsuo

Nagasaki

申请号：US07/771433申请日：19911004公开号：US05264940A公开日：19931123

摘要：In the exposure control circuit of an image input device according to thepresent invention, the rays of light from the subject pass through a diaphragm adjustingthe amount of light and undergoes photoelectric conversion at a CCD imaging element.The image signal read from the CCD imaging element is accumulated more than once atan accumulating circuit. The luminance of the subject is detected at a luminance detector.Based on the detected luminance, a condition setting circuit sets the amount of incidentlight, exposure time, and the number of additions to suitable values. With those suitablesettings, the amount of light through the diaphragm, the exposure time of the CCDimaging element, and the number of accumulations by the accumulating circuit arecontrolled so as to enable the subject to be photographed under the best condition.

申请人：OLYMPUS OPTICAL CO., LTD.

代理机构：Frishauf, Holtz, Goodman & Woodward

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