| 摘要 |
PURPOSE:To prevent the saturating state of an output signal, by detecting that signals photoelectric converted in excess of a prescribed level in output signal group per one frame are shared and adjusting the frame storage time through the detected value. CONSTITUTION:If video signals photoelectric converted in excess of a prescribed level take place during one frame scanning period, an F/F circuit 4 is set with an output of an analog comparator 2 and an AND gate 9 is closed. Thus, a U/D counter 5 is up-counted. The count value of the counter 5 shows the amount of signals photoelectric converted in excess of the prescribed level. This output is fetched to a latch circuit 12 and applied to an image sensor 1 via a D/A converter 10 and a V/F converter 13. Thus, the storage time of the image sensor 1 can be controlled. |
