| 摘要 |
A method to control the driving of a developing roller includes controlling a driving stop point of the developing roller which is independently driven, wherein the driving stop point of the developing roller is determined by adding the print medium feed time from a virtual print medium start point to a virtual image end point and the time a photosensitive drum takes to rotate from an exposure point to a developing point on the photosensitive drum, so that the developing roller is driven only for the time during which an electrostatic latent image is developed.
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