| 摘要 |
The image forming device, by providing an amount of toner remaining detection system, calculates the amount of relative change in the electrostatic capacitance in the amount of toner remaining over a prescribed number of sheets of recording paper (R) to sense the amount of toner remaining, and indicates that the amount of toner remaining is too low when it is judged that the amount of relative change in the electrostatic capacitance of said amount of toner remaining exceeds a reference amount of change, sensing of the amount of toner remaining and indication that it is too low are performed based on the relative change in one sensing signal relating to the amount of toner remaining, comparing two sensing signals relating to the amount of toner remaining as in the past is eliminated, and the process for adjusting the sensing output is made unnecessary.
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