IMAGE SENSING ELEMENT AND AN IMAGE SENSING METHOD CAPABLE OF MAKING RELATIVE IMAGE NOISE ABOUT IMAGE BRIGHTNESS OF EACH POSITION OF IMAGE PICKUP DEVICE IDENTICAL

摘要

PURPOSE: An image sensing device and an image sensing method is provided to prevent image of relatively bright part from being saturated with maximum brightness and measure image brightness of relatively dark part during maximum photographing time.;CONSTITUTION: An optical sensor unit (100) converts light which is reflected by subject and is inputted into electric signal and produces output. A comparison unit (200) determines the output whether to reach predetermined reference value for predetermined maximum photographing time. In case that the output reaches the predetermined reference value for the predetermined first photographing time, a clock unit (300) measures arrival time of the output. A memory unit (500) produces and stores brightness of image by using measured value by the comparison unit and the clock unit.;COPYRIGHT KIPO 2013;[Reference numerals] (100) Optical sensor unit; (200) Comparison unit; (210) Reference value collection unit; (300) Clock unit; (310) Reference clock; (320) Counter; (330) Start control unit; (400) Image brightness calculation unit; (500) Memory unit; (AA) Light; (BB) Shutter