Patent ID: 8983320
Filing Date: 2015-03-17
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: a latent-image bearing body to be rotationally driven; a charging unit to uniformly charge a surface of the latent-image bearing body; a latent-image writing unit to write a latent image to the surface after the charging unit uniformly charges the surface; a development unit to develop the latent image to form a toner image; a development power source to output a development bias to be supplied to the development unit, and a bias control unit to perform a process of periodically changing an output of the development bias from the development power source based on development bias control data, wherein, after a start of an image forming operation, the bias control unit performs a process of constantly maintaining the output of the development bias at an adjustment bias value for imaging with a pre-adjusted and fixed bias value, the adjustment bias value being a central value in a periodic fluctuation range of the output of the development bias, and at a timing at which a difference of the development bias from the adjustment bias value in the periodic fluctuation range is less than or equal to a predetermined threshold value, the bias control unit performs switching from the process of constantly maintaining the output of the development bias at the adjustment bias value to the process of periodically changing the output of the development bias based on the development bias control data.