| 摘要 |
PROBLEM TO BE SOLVED: To obtain images of good reproducibility by detecting a fly amount of a toner, judging a density of the toner and controlling a parameter of an image formation apparatus. SOLUTION: A CPU 102 judges a density of a toner detected by a detector and feeds back to a parameter of an image formation apparatus. A development bias control circuit 104 changes a development bias, and a control circuit 106 and a lens control circuit 108 change a voltage for flying the toner and a lens voltage respectively. The CPU 102 processes signals of an impression time of the voltage for flying the toner and the number of print times between latch cycles at a control circuit 113 for a control electrode, sends to a high voltage IC114 of the control electrode, thereby changing the impression time of the voltage for flying the toner and the number of print times between the latch cycles. Since the fly amount of the developing agent is detected and the density is judged, thereby controlling the parameter of the image formation apparatus as above, images of good reproducibility can be obtained in a direct print system. |
