Patent ID: 9632449
Date: 2017-04-25
CPC Classifications: G03G,H04N

Claim:
1. An image forming apparatus comprising: a light emitting unit configured to emit light by being supplied with a current; a light receiving unit configured to receive the light emitted from the light emitting unit and output a value related to a light reception amount; and a control unit configured to control light emission from the light emitting unit, wherein, after reception of an image forming instruction, the control unit performs adjustment for adjusting a superimposed current of first and second currents, and the second current through comparison between the value output from the light receiving unit and a reference value set based on a target setting signal, and after the adjustment, supplies the superimposed current of the first and the second currents or the second current to the light emitting unit to cause the light emitting unit to emit light, wherein the adjustment includes a first adjustment for adjusting the first current by supplying the superimposed current of the first and the second currents to the light emitting unit, and a second adjustment for adjusting the second current by supplying the second current to the light emitting unit without supplying the first current thereto, wherein, upon reception of the image forming instruction, the control unit performs adjustment in order of the second adjustment for the first time, the first adjustment for the first time, the second adjustment for the second time, and the first adjustment for the second time, and wherein an execution period of the second adjustment for the first time is longer than an execution period of the second adjustment for the second time.