Back to results
US 8,543,021 B2Granted
Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShiro Sakata, Yusuke Saito, Mitsunari Ito
Life of this patent
Estimating the term…
Abstract
The image forming apparatus calculates a surface voltage of an image bearing member based on a first charge start voltage, which is obtained when a first voltage application section applies a first DC voltage to a charge section, and a second charge start voltage, which is obtained when a second voltage application section applies a second DC voltage to the charge section. This allows a high-quality image to be formed irrespective of a change in circumstance or drum layer thickness.
Claims6
An image forming apparatus, comprising:
- an image bearing member;
- a first voltage application section for applying a first DC voltage to a charge section for charging the image bearing member;
- a second voltage application section for applying a second DC voltage, which has a polarity reverse to a polarity of the first DC voltage, to the charge section for charging the image bearing member;
- and
- a calculation section for calculating a surface voltage of the image bearing member based on a first charge start voltage between the charge section and the image bearing member, which is obtained when the first voltage application section applies the first DC voltage to the charge section, and a second charge start voltage between the charge section and the image bearing member, which is obtained when the second voltage application section applies the second DC voltage to the charge section.
2 more elements
Dependencies are inferred from the claim text.