发明名称 ELECTRONIC SHUTTER CONTROLLER AND ELECTRONIC CAMERA USING THE SAME
摘要 PROBLEM TO BE SOLVED: To provide an electronic shutter controller and an electronic camera that prevent properly hunting without deteriorating tracking performance to the luminance change of an object. SOLUTION: A discrimination section 15 discriminates whether a current shutter speed is to be maintained, or quickened by one step or slowed down, based on a comparison result of a peak signal value by comparators 11-1, 11-2 and provides an output of a discrimination result to a shutter speed decision circuit 18. A hunting detection section 16 detects whether or not hunting takes place based on a change in a shutter speed by the shutter speed decision circuit 18 or a change in the discrimination result by the discrimination section 15 and informs a detection pulse generating section 17 of it, when hunting takes place. When hunting occurs, the detection pulse generating section 17 generates a detection pulse, whose pulse interval is set longer and outputs it to a peak hold circuit 9, the discrimination section 15 and the hunting detection section 16 and the processing to decide the shutter speed is executed based on the detection pulse.
申请公布号 JP2000069374(A) 申请公布日期 2000.03.03
申请号 JP19980249199 申请日期 1998.08.19
申请人 NIKON CORP 发明人 SUZUKI KENJI
分类号 H04N5/335;H04N5/341;H04N5/351;H04N5/353;H04N5/357;H04N5/363;H04N5/372;H04N5/378;(IPC1-7):H04N5/335 主分类号 H04N5/335
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