| 摘要 |
<p>PURPOSE:To prevent occurrence of a malfunction by applying an effectively controller high voltage to a light emitting element such as an end light emission type EL element, etc. CONSTITUTION:The image forming apparatus comprises a drive controller 32 for controlling a common driver 34 and a line head 35 according to control signals Cm and Li, and a delay circuit 32a which outputs a control signal Hv by delaying an output timing by a time T2 from the signals Cm and Li. The apparatus further comprises an output controller 33a which applies OFF positive and negative high voltages Vp and Vn and ON positive and negative high voltages Vr and Vm generated from a high-voltage power source 33 at an output timing of the signal Hv from the circuit 32a to a line head 35 via the driver 34.</p> |
