| 摘要 |
<p>An image forming apparatus including: optical sensor (10) to receive a bias current and to divide the bias current into two output currents, according to positions of a light beam on the optical sensor; and a signal processor (210) to detect horizontal synchronization signals using the output currents, to calculate a positional deviation of the horizontal synchronization signals, and to control a recording time of video data according to the positional deviation.</p> |
