| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a change in a position and the occurrence of missing due to the expansion/reduction of a screen. <P>SOLUTION: A video signal of a master screen is supplied to a changeover switch 2 from an input terminal 1 and switched to a video signal of a slave screen that is described later, and the video signal is supplied to a picture tube 4 through an RGB drive circuit 3. The video signal of the slave screen is supplied from an input terminal 5 to a slave screen signal formation circuit 6, reduced to an optional size, and extracted at timing of an optional position to form a video signal of the slave screen. Further, a command signal from a commanding means is supplied to a microcomputer 9 through an input terminal 8. In the microcomputer 9, the command signal is supplied to a central processing unit (CPU) 10, a display size change processing means 11 (software) forms a control signal of a display size, and a display position movement processing means 12 (software) forms a control signal of a display position. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
