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US 11,599,051 B1Granted
Image forming apparatus and method for determining a cause of deterioration
AssigneeToshiba Tec Kabushiki Kaisha
InventorYasunari Miyazaki
Life of this patent
Estimating the term…
Abstract
An image forming apparatus includes a photoconductor, a charger, a detection unit, and a determination unit. The charger charges the photoconductor. The detection unit detects an actual charging potential of the photoconductor after the photoconductor is charged by the charger. The determination unit determines one of a plurality of causes related to a charging abnormality of the photoconductor based on a relationship between a standard charging potential of the photoconductor to be obtained by charging by the charger and a charging potential detected by the detection unit.
Claims13
An image forming apparatus, comprising:
- a photoconductor;
- a charger that charges the photoconductor;
- a detector that detects an actual charging potential of the photoconductor after the photoconductor is charged by the charger;
- and
- a processor that can execute instructions to perform operations, comprising:
- determining one of a plurality of causes related to a charging abnormality of the photoconductor based on a relationship between a standard charging potential of the photoconductor obtained by charging by the charger and a charging potential detected by the detector;
- determining the cause based on an amount of deviation of the charging potential detected by the detector from a standard potential range if the charging potential detected by the detector is deviated from the standard potential range including the standard charging potential of the photoconductor as a central value;
- determining that the photoconductor or the charger is abnormal if the charging potential detected by the detector is included within a first potential range that is in contact with a potential side lower than the standard potential range;
- determining that a system of the image forming apparatus or the detector is abnormal if the charging potential detected by the detector is included within a second potential range that is in contact with a potential side lower than the first potential range;
- and
- determining that the detector is abnormal if the charging potential detected by the detector is included within a third potential range that is in contact with a potential side lower than the second potential range.
8 more elements
A method for an image forming apparatus, comprising:
- detecting an actual charging potential of a photoconductor by a charger after the photoconductor is charged by the charger;
- determining one of a plurality of causes related to a charging abnormality of the photoconductor based on a relationship between a standard charging potential of the photoconductor obtained by charging by the charger and a charging potential detected;
- determining the cause based on an amount of deviation of the charging potential detected from a standard potential range if the charging potential detected is deviated from the standard potential range including the standard charging potential of the photoconductor as a central value;
- determining that the photoconductor or the charger is abnormal if the charging potential detected is included within a first potential range that is in contact with a potential side lower than the standard potential range;
- determining that a system of the image forming apparatus is abnormal if the charging potential detected is included within a second potential range that is in contact with a potential side lower than the first potential range;
- and
- determining that a detector is abnormal if the charging potential detected is included within a third potential range that is in contact with a potential side lower than the second potential range.
4 more elements
An image forming apparatus, comprising:
- a photoconductor;
- a charger that charges the photoconductor;
- a detector that detects an actual charging potential of the photoconductor after the photoconductor is charged by the charger;
- and
- a processor that can execute instructions to perform operations, comprising:
- determining one of a plurality of causes related to a charging abnormality of the photoconductor based on a relationship between a standard charging potential of the photoconductor obtained by charging by the charger and a charging potential detected by the detector;
- determining the cause based on an amount of deviation of the charging potential detected by the detector from a standard potential range if the charging potential detected by the detector is deviated from the standard potential range including the standard charging potential of the photoconductor as a central value;
- determining that the charger is abnormal if the charging potential detected by the detector is included within a fourth potential range that is in contact with a potential side higher than the standard potential range;
- and
- determining that a system of the image forming apparatus or the detector is abnormal if the charging potential detected by the detector is included within a fifth potential range that is in contact with a potential side higher than the fourth potential range.
7 more elements
Dependencies are inferred from the claim text.