| 摘要 |
Provided is an image forming device provided with a corona charging unit that charges a light sensitive body, wherein minute changes in the potential of the surface of the light sensitive body can be recognized visually as changes in toner image. An image forming device is capable of implementing a first mode wherein an electrostatic latent image is formed by an exposure means and a toner image formed on the surface of the light sensitive body, and a second mode wherein a toner image for adjusting inclination with respect to the surface of the light sensitive body in the longitudinal direction of the corona charging unit is output without substantially forming an electrostatic latent image using the exposure means. The vibration voltage for superimposition on development bias in the second mode is set such that the amount of change in toner image density to the amount of change in development contrast within a prescribed range of toner image density is greater with the development bias used in the second mode than with the development bias used in the first mode, and also the development contrast in the second mode is set such that the toner image density is within the prescribed range. |
