DISPLAY DEVICE OF EXPOSING TIME OF ELECTRONIC IMAGE PICKUP DEVICE

摘要

PURPOSE:To make the titled device correspond to a display sequence of a camera using a silver salt film by driving a counter for a period corresponding to a light emitting time by a reference pulse signal and converting the output of the counter into a shutter second value to display the converted value. CONSTITUTION:A prescribed reference pulse signal generated from a reference pulse generating circuit 1 is passed through a gate circuit 3 by a period of pulse width corresponding to the light emitting period of a gate control circuit 2 and inputted to the counter 4. The counter 4 executes counting by using the period of the reference pulse as the minimum unit time and the counted output value is inputted to an arithmetic circuit 5 and converted into an exposing time. Since the counted output value itself coincides with the exposing time by making the reference pulse signal period correspond to the counted output value '1' the counter, the constitution of the circuit 5 can be simplified. The exposing time is converted into the relation corresponding to the shutter second values set up in an ordinary camera and then displayed on a display circuit 6.