Patent ID: 9482984
Filing Date: 2016-11-01
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: a semiconductor laser configured to emit a laser beam by receiving a current, wherein a light amount of the laser beam corresponds to a value of the current; a photosensitive member configured to be exposed to the laser beam emitted from the semiconductor laser so that an electrostatic latent image is formed thereon; a light receiving unit configured to receive the laser beam emitted from the semiconductor laser; a driving current supply unit configured to supply a driving current to the semiconductor laser based on an image signal and configured to control a value of the driving current based on a reception result of the light receiving unit; and a correction current supply unit including a first correction current generation unit configured to generate a first correction current that attenuates over time from a peak value thereof and a second correction current generation unit configured to generate a second correction current that attenuates over time from a peak value thereof and of which an attenuation speed is lower than that of the first correction current, configured to supply the first correction current and the second correction current to the semiconductor laser in synchronization with a supply start of the driving current to the semiconductor laser to superimpose the first correction current and the second correction current on the driving current, and configured to control the peak value of the first correction current and the peak value of the second correction current based on the reception result of the light receiving unit, wherein the peak value of the first correction current is larger than the peak value of the second correction current.