| 摘要 |
<p>PURPOSE:To make written letters having high density printing quality, by arranging LEDs zigzag in plural rows in parallel to the axial direction of a photoreceptor, keeping the same state with respect to the photoreceptor. CONSTITUTION:An exposure section 6 consists of a plural of LED12 and an LED assembly 13, and a plural of LED12 are made zigzag arranged in 2 rows in parallel to the axial direction of a photoreceptor with same pitch. Each LED faces to the axis of the photoreceptor 4, and the distance between the surface of the photoreceptor 4 and each LED is kept as same as G2. The edge of each LED is situated on the circumference of a radius of (R+G2) about the photoreceptor axis where its radius is denoted as R.</p> |
