IMAGE FORMATION APPARATUS

摘要

An image formation apparatus includes an image carrier; a charge member; an exposure unit; a development member; a measurement unit that measures a stop time period when a rotation of the image carrier is being stopped, or a physical amount that varies as the stop time period increases; a setting unit that sets a polarity of an initial voltage to be applied to the development member, the polarity being determined based on the stop time period or the physical amount measured by the measurement unit; and a power source unit that applies the initial voltage with the polarity set by the setting unit to the development member, at rotation start time of the image carrier.

主权项

1. An image formation apparatus comprising:
an image carrier including a peripheral surface with a photosensitive element; a charge member placed facing the peripheral surface and configured to charge the peripheral surface; an exposure unit that exposes with light a charged region of the peripheral surface charged by the charge member to form an electrostatic latent image; a development member placed facing the peripheral surface at a position downstream of the charge member in a rotation direction of the image carrier, and configured to develop the electrostatic latent image with a developer; a measurement unit that measures a stop time period when a rotation of the image carrier is being stopped, or a physical amount that varies as the stop time period increases; a setting unit that sets a polarity of an initial voltage to be applied to the development member, the polarity determined based on the stop time period or the physical amount measured by the measurement unit; and a power source unit that applies the initial voltage with the polarity set by the setting unit to the development member, at rotation start time of the image carrier.