| 摘要 |
PURPOSE:To lower the peak value of discharge current by dividing at least either one of a scanning electrode and a maintaining discharge electrode into plural groups in a maintaining discharge period and providing a phase difference between pulse voltages to be applied. CONSTITUTION:A positive polarity charge image is stored on the surface of a protection film layer, and many scanning electrodes are divided into four scanning electrode groups in the maintaining discharge period succeeding to the write period, and negative pulse voltages Vs shown by SCN(A)-SCN(D) are applied to respective scanning electrode groups. In this case, the phase difference is provided so that the rise time of the negative pulse voltage Vs of the SCN(A), the rise time of the negative pulse voltage Vs of the SCN(B), the rise time of the negative pulse voltage Vs of the SCN(C) and the rise time of the negative pulse voltage Vs of the SCN(D) are delayed successively. Further, in an erasure period, a negative narrow width erasure pulse voltage Ve is applied to all maintaining discharge electrodes. |
