IMAGE FORMING APPARATUS
First Claim
1. An image forming apparatus comprising:
- a photosensitive member;
a charging member configured to charge the photosensitive member to form an unexposed portion on the photosensitive member;
an exposure device configured to expose the photosensitive member charged by the charging member to form an exposed portion on the photosensitive member;
a voltage applying member configured to apply a voltage to the photosensitive member;
a detecting unit configured to detect a value of a current flowing to the photosensitive member when a voltage is supplied to the voltage applying member or a value of a voltage applied to the photosensitive member when a current is supplied to the voltage applying member;
an acquiring unit configured to acquire information concerning a difference between potential of the unexposed portion and potential of the exposed portion, based on detection results of the detecting unit at times when the voltage is applied by the voltage applying member to each of the unexposed portion formed in a region chargeable by the charging member in a rotation axis direction of the photosensitive member and the exposed portion formed in a region exposable by the exposure device in the rotation axis direction of the photosensitive member; and
a control unit configured to control an image forming condition based on the information concerning the difference.
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Accused Products
Abstract
An image forming apparatus includes a detecting unit detecting a value of a current flowing to a photosensitive member when a voltage is supplied to a voltage applying member or a value of a voltage applied to the photosensitive member when a current is supplied to the voltage applying member, an acquiring unit acquiring information concerning a difference between potentials of the unexposed portion and the exposed portion, based on detection results of the detecting unit at times when the voltage is applied by the voltage applying member to each of an unexposed portion formed in a region chargeable by a charging member in a rotation axis direction of the photosensitive member and an exposed portion formed in a region exposable by the exposure device in the rotation axis direction of the photosensitive member, and a control unit controlling an image forming condition based on the information concerning the difference.
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Citations
15 Claims
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1. An image forming apparatus comprising:
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a photosensitive member; a charging member configured to charge the photosensitive member to form an unexposed portion on the photosensitive member; an exposure device configured to expose the photosensitive member charged by the charging member to form an exposed portion on the photosensitive member; a voltage applying member configured to apply a voltage to the photosensitive member; a detecting unit configured to detect a value of a current flowing to the photosensitive member when a voltage is supplied to the voltage applying member or a value of a voltage applied to the photosensitive member when a current is supplied to the voltage applying member; an acquiring unit configured to acquire information concerning a difference between potential of the unexposed portion and potential of the exposed portion, based on detection results of the detecting unit at times when the voltage is applied by the voltage applying member to each of the unexposed portion formed in a region chargeable by the charging member in a rotation axis direction of the photosensitive member and the exposed portion formed in a region exposable by the exposure device in the rotation axis direction of the photosensitive member; and a control unit configured to control an image forming condition based on the information concerning the difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification