| 摘要 |
PURPOSE:To prevent the production of spike voltage, by delaying the black signal only for a given time, when the change point from white to black is detected, in the resistance diode matrix drive type multistylus electrode used for the formation of latent image of electrostatic recorder. CONSTITUTION:When the changing point is detected at the white to black changing point detector 1 to the input video signal V relating to one bit of video signal, the signal delayed at the delay production circuit 2 is taken for AND with the signal V at the AND circuit 3, the output picture signal P is delayed for tau at the change point, and video signal is delayed only at the part changing white to black, and the applying time of the signal for other part is unchanged. The block selection signal and the video signals V1, V2... in synchronizing with it are fed to the row and column of the resistance diode matrix drive type multistylus electrode and the stylus electrode is driven, which is connected to the junctions P1, P2... of the series circuit consisting of resistances and diodes, preventing the spike voltage to achieve the removal of ghost image. |
