| 摘要 |
An apparatus for controlling a toner density accurately in response to printing data include a toner sensor, a memory, a data input unit, a toner supply amount controlling unit, and a CPU. The toner sensor detects the toner density and generates a toner density detection value. The memory stores a toner density set-up value and an operational constant data table having an operational constant corresponding to the printing data. The toner supply amount controlling unit supplies the toner in response to a control signal generated from the CPU. The CPU determines the operational constant by using the operational constant data table, and controls the toner supply amount controlling unit by using the control signal generated from the operational constant, the toner density detection value, and the toner density set-up value.
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