| 摘要 |
PURPOSE:To prevent a computer picture from flowing by interrupting the supply of an RCB signal from a computer to a color television video equipment when the computer and a color television receiver are in super-imposed mode. CONSTITUTION:When the computer 8 and the color television receiver 6 are in super-imposed mode and external video devices 4, 5 are used as the sources of video signals, an RGB signal from the computer 8 is cut off by AND gates 24a- 24c and are not sent to the color television receiver 6. Since a computer picture due to the RGB signal is not displayed on the color television receiver 6, the computer picture is prevented from flowing. |
