| 摘要 |
PURPOSE:To superimpose a stable display on a screen with simple circuit constitution by providing a circuit inhibiting a clock of instruction execution from being inputted to a microcomputer during a remaining time which is s division of a unit horizontal scanning period divided by a unit instruction execution time of the microcomputer. CONSTITUTION:A horizontal synchronizing signal and an original signal for synchronism are outputted from a synchronizing signal generator 1 of a display device of a video camera, the synchronizing signal is inputted to an image pickup element 2 and an inhibiting circuit 3 and also the synchronism original signal for executing instruction is inputted to the circuit 3. The circuit 3 is provided with a count circuit 7, an FF circuit 8 and an AND circuit 9, and the clock of instruction execution is inhibited from being inputted to the computer 4 within the remaining time being a division of the unit horizontal scanning period by the unit instruction executing time of the microcomputer 4. Further, the computer 4 executes the display instruction based on the clock of the circuit 3, mixes the video signal and the display control from the circuit 3, the result is applied to an electric view finder so as to simplify the constitution. |
