Image forming apparatus with variable process speed

An image forming apparatus is provided which is capable of forming higher-quality images by detecting a toner concentration with higher accuracy to attain appropriate toner supply and image density. A value obtained by adding a correction value based on a temperature, humidity, a print coverage, or...

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Bibliographic Details
Main Authors FUJITA SYOUICHI, ITOYAMA MOTOYUKI, MURATA MITSUHIRO
Format Patent
LanguageEnglish
Published 13.04.2010
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:An image forming apparatus is provided which is capable of forming higher-quality images by detecting a toner concentration with higher accuracy to attain appropriate toner supply and image density. A value obtained by adding a correction value based on a temperature, humidity, a print coverage, or the like to a developer concentration adjustment value is set as a control voltage value Vc which is to be inputted to a toner concentration sensor, and an output value of the toner concentration sensor is detected for each of process speeds. A difference between the output value detected and a value at reference process speed is calculated and based on the difference, a correction value is further calculated. Such another calculation of the correction value with use of the output value detected allows for highly accurate correction.
Bibliography:Application Number: US20080041702