Patent ID: 8977151
Filing Date: 2015-03-10
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a latent image support member; a latent image forming unit for forming an electrostatic latent image on the latent image support member in accordance with image data; a developer support member for supporting a developer including toner and for supplying the toner to the latent image support member to develop the electrostatic latent image; a voltage applying device for applying a developing bias, which is a superimposed voltage of a DC voltage and an AC voltage, to the developer support member; a first selecting device for selecting a screen ruling in accordance with the image data; and a second selecting device for selecting a frequency of the AC voltage, wherein the second selecting device selects a first frequency when the first selecting device selects a first screen ruling, and selects a second frequency lower than the first frequency when the first selecting device selects a second screen ruling higher than the first screen ruling.