Patent ID: 6172696
Filing Date: 2001-01-09
Classification: B41J,H04N

Abstract:
An image forming apparatus comprising:a photosensitive drum;a stepping motor for directly driving and rotating the photosensitive drum; andan optical unit for scanning the photosensitive drum, which is rotated by the stepping motor, one scanning line at a time using an optical beam to form a latent image on the photosensitive drum,wherein .theta. (.degree.) indicating a step angle of the stepping motor, p (mm) indicating a distance between scanning lines on the photosensitive drum, and d (mm) indicating a diameter of the photosensitive drum are set so as to satisfy a following equation to make the optical unit scan the photosensitive drum by one scanning line every time the photosensitive drum is rotated n steps by the stepping motor, n being a positive integer: n.multidot..theta.=(360.multidot.p)/(.pi..multidot.d).