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US 2019/0072871 A1Published application
Image forming apparatus that performs exposure for discharging photoconductive drum
AssigneeCanon Kabushiki Kaisha
InventorKazunori Miyake
Life of this patent
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Abstract
In an image forming apparatus that executes exposure for discharging a photoconductive drum by a light emitting unit by which an electrostatic latent image is formed, a duty ratio of a drive signal for a driving unit that exposes the photoconductive drum for performing discharging of the photoconductive drum is set to be 100%, and it is thereby possible to suppress generation of radiation noise resulting from the drive signal for the discharging.
Claims14
An image forming apparatus comprising:
- a plurality of photoconductive drums;
- a plurality of light emitting units each of which emits light with which a corresponding one of the photoconductive drums is exposed in a case where a driving current is supplied, the light emitting units being separately provided correspondingly to the plurality of photoconductive drums;
- a driving unit that supplies the driving current to each of the light emitting units in accordance with a drive signal, the drive signal being an ON/OFF signal by which the light emitting unit is turned on or off;
- and
- a controller that transmits the drive signal to the driving unit, the controller selectively transmitting the drive signal generated on a basis of input image data for forming an electrostatic latent image on each of the photoconductive drums or the drive signal a duty ratio of which is 100% for performing discharging of the photoconductive drum.
2 more elements
An image forming apparatus, comprising:
- a photoconductive drum;
- a light emitting unit which emits light with which the photoconductive drum is exposed in a case where a driving current is supplied;
- a driving unit that supplies the driving current to the light emitting unit in accordance with a drive signal, the drive signal being an ON/OFF signal by which the light emitting unit is turned on or off;
- and
- a controller that transmits the drive signal to the driving unit, the controller selectively transmitting the drive signal generated on a basis of input image data for forming an electrostatic latent image on the photoconductive drum or the drive signal a duty ratio of which is 100% for performing discharging of the photoconductive drum.
2 more elements
Dependencies are inferred from the claim text.