IMAGE FORMING APPARATUS
An image forming apparatus comprising: an image bearing member (201) configured to bear a developer image; a developer bearing member (302) configured to bear developer; and a detection unit (220) configured to detect a developer amount on the image bearing member (201); wherein, in an image forming...
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| Hauptverfasser: | , , , |
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | An image forming apparatus comprising: an image bearing member (201) configured to bear a developer image; a developer bearing member (302) configured to bear developer; and a detection unit (220) configured to detect a developer amount on the image bearing member (201); wherein, in an image forming mode, the developer image is formed on the image bearing member (201) by supply of developer from the developer bearing member (302) to the image bearing member (201) and
in a detection mode, a detection developer image used for detection is formed on the image bearing member (201) and a developer amount of the detection developer image is detected by the detection unit (220), changing of a peripheral speed ratio, resulting in change of the developer amount per unit area, enables the detection unit to detect the developer amount with sufficient accuracy. |
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