Patent ID: 7826754

Claim:
An image forming apparatus comprising: a photosensitive member, a photosensitive layer formed on a surface of the photosensitive member; a charging device that charges the photosensitive member; a developing device that forms a toner image on the surface of the photosensitive member; a thickness detecting unit that detects a thickness of the photosensitive layer on a basis of a value of a current supplied to the charging device; and a parameter setting unit, wherein when the thickness detecting unit detects the thickness of the photosensitive layer, the parameter setting unit sets at least one of a charge parameter for the charging device and a development parameter to be different from that used in forming an image on a recording medium by transferring a toner image formed on the surface of the photosensitive member onto the recording medium, wherein: the parameter setting unit sets a bias voltage applied to the developing device as the development parameter for the developing device, and when the thickness detecting unit detects the thickness of the photosensitive layer, the parameter setting unit sets the development parameter so as to provide a period in which a value of a bias voltage is larger than that used in forming the image on the recording medium.