| 摘要 |
PURPOSE:To perform the integration of each color of image data by one integration means in common and to drastically simplify the constitution of a circuit without deteriorating basic performance as for the replenishment of toner. CONSTITUTION:Lines of the image signals of the respective colors C, M, Y and K whose colors are corrected by a color correction circuit 30 are thinned in a sub-scanning direction and the image signals are successively supplied to a common image data integration circuit 32. Then, the integration thereof is executed for each color. The integrated values of the image data of the respective colors from the integration circuit 32 are inputted to a CPU 35 after the integration is finished and toner replenishing time for respectively driving the toner carrying screws of the toner hoppers of the respective colors is calculated according to the program of the CPU 35. An output signal showing the calculated toner replenishing time is successively sent to a toner replenishment circuit 36 and the toner of prescribed quantity is replenished in a developing device by driving a carrying screw of the toner hopper by the toner replenishing time. Then, the mixing ratio of the toner and the carrier of two-component developer is always kept constant. |
