IMAGE FORMING APPARATUS, AND PATTERN DETECTION METHOD FOR IMAGE FORMING APPARATUS

To improve the accuracy in detecting toner patterns for color shift correction formed on an image carrier.SOLUTION: An image forming apparatus comprises: an image carrier 103 that carries a toner image; an image forming unit 201 that forms, in a sub scanning direction of the image carrier 103, patte...

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Main Authors SHIMODA JUNICHI, KEMMOCHI TAKUYA, FUNADA NAOHIRO, TAKEI KAZUFUMI, ISHIZUKA NATSUKO
Format Patent
LanguageEnglish
Japanese
Published 26.09.2019
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:To improve the accuracy in detecting toner patterns for color shift correction formed on an image carrier.SOLUTION: An image forming apparatus comprises: an image carrier 103 that carries a toner image; an image forming unit 201 that forms, in a sub scanning direction of the image carrier 103, pattern image being a set of constant intervals for the same color sequentially for every sets of a plurality of colors; an image detection unit 203 that detects the pattern images formed on the image carrier 103; and a CPU 204 that, among the detected pattern images, recognizes if the interval between the adjacent pattern images is a set interval for the same color and excludes images in which the interval is not the set interval.SELECTED DRAWING: Figure 3 【課題】像担持体に形成された色ずれ補正用のトナーパターンの検出精度を向上させる。ことを目的とする。【解決手段】トナー像を担持する像担持体１０３と、像担持体１０３の副走査方向に、同色について一定間隔の組とするパターン像を複数色の組ごとに順で形成する像形成部２０１と、像担持体１０３に形成されたパターン像を検出する像検出部２０３と、検出された前記パターン像のうち、同色について隣接するパターン像の間隔が設定間隔であるかを認識し、設定間隔ではない像を除外するＣＰＵ２０４と、を備える。【選択図】図３
Bibliography:Application Number: JP20180051795