Patent ID: 7599647
Filing Date: 2009-10-06
Classification: G03G

Abstract:
1. A charging device which is installed in an electrophotographic apparatus and charges at a predetermined potential a surface of an electrostatic latent image carrier which is driven for rotation, the charging device comprising: at least one wire which is subjected to application of a high voltage and placed at a position that faces the electrostatic latent image carrier so that an axial direction of the wire is orthogonal to a rotational direction of the electrostatic latent image carrier; a shield electrode which shields the wire and has an open surface that faces the electrostatic latent image carrier; and a meshed grid electrode which is placed so as to face the open surface of the shield electrode, wherein: the grid electrode is arranged to be a fine-meshed grid electrode as a circumferential velocity of the electrostatic latent image carrier is low, and to be a coarse-meshed grid electrode as a circumferential velocity of the electrostatic latent image carrier is high.