| 摘要 |
PROBLEM TO BE SOLVED: To reduce change in position and generation of omission caused by expansion/reduction of picture. SOLUTION: The video signal of a master picture is supplied from an input terminal 1 to a changeover switch 2 and switched with the video signal of a slave picture, and this video signal is supplied through an RGB drive circuit 3 to a picture tube 4. Besides, the video signal of the slave picture is supplied from an input terminal 5 to a formation circuit 6 for slave picture signal, reduced into arbitrary size and extracted at the timing of arbitrary position and the video signal of the slave picture is formed. Further, a command signal from a command means is supplied through an input terminal 8 to a microcomputer 9. Concerning this microcomputer 9, the command signal is supplied to a central processing unit(CPU) 10, the control signal of a display size is formed by a display size change processing means 11 (software), and the control signal of display position is formed by a display position moving processing means 12 (software). |
