Endoscope control unit and endoscope unit

An endoscope control unit, the endoscope control unit ordering a CMOS imaging device to capture an image and to carry out signal processing for supplying an image signal to a monitor, the CMOS imaging device being mounted in an electronic endoscope, the CMOS imaging device generating the image signal on the basis of the captured image, the endoscope control unit comprising:

• an imaging device controller that orders the CMOS imaging device to generate a frame's worth of image signal every first period, the first period being shorter than a second period, the image to be displayed on the monitor being refreshed every second period in order to display a moving image, the image corresponding to one frame of the image signal;
• and
• a first signal-processing circuit that outputs one frame of the image signal generated by the CMOS imaging device to the monitor every second period.