| 摘要 |
PURPOSE:To provide a multiscan display device executing surely a degaussing which is performed by making a degaussing switch ON during a pixcture display. CONSTITUTION:The multiscan display has a microcomputer part 11 generating a control signal 'B' corresponding to the frequency of a vertical synchronizing signal, a vertical oscillator 12 generating sawtooth waves 'C' based on the control signal 'B' and an amplifier 13 generating a vertical deflection signal 'D' based on the sawtooth waves 'C' and the correction signal of a vertical correcting part 14. When the ON of a degaussing switch is detected, a vertical deflection magnetic field having a frequency deviated by a prescribed amount from the frequency of the vertical synchronizing signal based on predetermined data is generated in the period of time when a degaussed magnetic field is generated and then the vertical synchronism is lost. Since the interference between the vertical deflection magnetic field and the degaussed magnetic field is eliminated, a normal degaussing is performed and thereafter a screen display having no electron deviation is obtained. This device is suitable for the multiscan display device utilized in a DTP and a plate making., etc. |
