| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide image forming apparatus and method capable of performing scanning control of a light beam well using a photosensor without imposing a damage to a latent image carrier. <P>SOLUTION: Prior to lighting a laser light source, a decision is made whether power of the apparatus has been just turned on or not, and the amplitude of a deflector is set at a minimum level or above by causing resonance oscillation of the deflector based on initial driving conditions corresponding to the decision results. Subsequently, the laser light source is lighted. Consequently, the light beam passes at least through a horizontal synchronous sensor in scanning already at the lighting time of the laser light source. Concentration of the light beam on a part of a photosensitive body can thereby be prevented and deterioration of the photosensitive body can be prevented surely. Furthermore, a scanning light beam passes through the horizontal synchronous sensor and a horizontal synchronous signal is outputted surely from the horizontal synchronous sensor. As a result, scanning speed of the light beam can be adjusted with high precision based on that signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
