| 摘要 |
PURPOSE:To obtain a good image without turbulance by determining the timing of reading out data for impressing on a recording electrode corresponding to the timing synchronized to cycle of rotary magnetic field. CONSTITUTION:A Hall sensor element 101 is installed approximately on a surface of a nonmagnetic cylinder 102, density of magnetic flux on the surface of the cylinder is measured, transformed to voltage, and inputted to a memory controller 105 in pulse shape. A clock which records the data to a shift resister 107 synchronized with the cycle of change of the density of the magnetic flux on the non magnetic cylinder 102, an address which outputs the data to a mem ory 106, and timing of transferring the data of the shift resister 107 to a line buffer 108 is created by the memory controller 105. Then the timing of impress ing the data to the recording electrode 111 is carried out by the signal Sig 1. Therefore, the state of napping during recording is made constant during recording, and variance in dot size in a sub scanning direction of the dot is eliminated. Thus, image quality is improved. |
