Image forming apparatus

JP7884372B2Active Publication Date: 2026-07-03CANON KK
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Patent Information

Application Number
JP2022086233
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-05-26
Publication Date
2026-07-03
Estimated Expiration
2042-05-26

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Abstract

To achieve both a reduction in the consumption of toner in a test image used for color shift correction and stable detection of the test image.SOLUTION: A correction pattern includes an overlapping pattern in which a toner image in a first single color is formed as a lower layer and a toner image in a second single color having the smaller area than that of the toner image in the first single color is formed as an upper layer. The overlapping pattern is formed so that a dynamic range D is less than 1.0 and larger than 0.5, which is calculated from a first light receiving amount V1 acquired by receiving reflected light from the toner image in the first single color, a second light receiving amount V2 acquired by receiving reflected light from the toner image in the second single color, a light receiving amount V1' when a gradation value of the toner image in the first single color is 100%, and a light receiving amount V2' when a gradation value of the toner image in the second single color is 100%.SELECTED DRAWING: Figure 9
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Citation Information

Patent Citations

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    JP2008203670A

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    JP2010113286A

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    JP2012042674A

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    JP2016212266A

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    JP2019117359A