| 摘要 |
PURPOSE:To reduce the degree of unnatural feeling when the video signals of 4:3 standard aspect are shown on a display screen of 16:9 wide aspect ratio. CONSTITUTION:The vertical synchronizing signal Vs is supplied to a vertically deflected drive signal generating circuit 1, and the optional waveform data are also supplied to the circuit 1 from a waveform memory 2. Thus a vertically deflected drive signal Vd is produced. The drive signal is supplied to one of the ends of a vertically deflected yoke 5 from the circuit 1 through a resistor 3 and an output amplifier 4. The other end of the yoke 5 is grounded through a resistor 6. Then the signal acquired at the junction of the resistor 6 is fed back to the amplifier 4 through a resistor 7. Thus the display having the normal vertical linearity is assured in a normal state by the waveform data given from the memory 2. Furthermore a mode switching signal is supplied to the memory 2 so that the waveform data are changed. Thus the display is carried out with he part nearby at least one of upper and lower ends compressed in the vertical direction. |
