IMAGE FORMING APPARATUS

摘要

In APC, if light power control with different target light powers is continuously executed, the amplitude of an output signal from a light-receiving element after the light power control is changed is generated, and a long time is required for completion of the light power control after the change. To address the problem, light power control with the same target light power is continuously executed on at least two light-emitting points in APC.

主权项

1. An image forming apparatus, comprising:
a light source including a plurality of light-emitting points that emit light beams for exposing a photosensitive member; a light-receiving unit configured to receive the plurality of light beams emitted from the plurality of light-emitting points; a light power control unit configured to execute first light power control controlling driving current supplied to each of the plurality of light-emitting points, so that a light power of the light beams received by the light-receiving unit becomes a first light power, and second light power control controlling the driving current supplied to each of the plurality of light-emitting points, so that the light power of the light beams received by the light-receiving unit becomes a second light power; and a bias current control unit configured to control a value of bias current supplied to each of the plurality of light-emitting points based on results of the first light power control and the second light power control by the light power control unit, wherein the light power control unit is configured to execute the first light power control and the second light power control on the plurality of light-emitting points at different timings and continuously executes the first light power control on at least two or more light-emitting points among the plurality of light-emitting points.