IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To estimate humidity in order to set an image forming condition without including a dedicated humidity sensor or a leakage current detection part and a wiring pattern of a substrate.SOLUTION: A wiring W3 that is a feedback line included in a developing voltage application circu...

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Main Authors KANEHARA KOHEI, KATO HIROTAKA, SHIMAMURA YASUHIRO, HAMAYA MASASHI, MANO KEISUKE
Format Patent
LanguageEnglish
Japanese
Published 25.07.2016
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To estimate humidity in order to set an image forming condition without including a dedicated humidity sensor or a leakage current detection part and a wiring pattern of a substrate.SOLUTION: A wiring W3 that is a feedback line included in a developing voltage application circuit 120 is disposed adjacent to a terminal T1 formed at an end of a wiring W1 that is an output line of a charging voltage application circuit 110. A leakage current I1 flowing to a ground voltage from the terminal T1 from which a high voltage is output through the wiring W3 is detected with a detection resistor R5. Since the leakage current I1 depends on humidity, humidity can be estimated from the leakage current I1 and an image forming condition can be appropriately set according to humidity.SELECTED DRAWING: Figure 4 【課題】画像形成条件を設定するために、専用の湿度センサあるいはリーク電流検出部および基板の配線パターンを備えず、湿度を推定する。【解決手段】現像電圧印加回路１２０に含まれるフィードバック線である配線Ｗ３を帯電電圧印加回路１１０の出力線である配線Ｗ１の端部に形成される端子Ｔ１に隣接して配設する。高電圧が出力される端子Ｔ１から配線Ｗ３を介して接地電圧に流れるリーク電流Ｉ１を検出抵抗Ｒ５により検出する。リーク電流Ｉ１は湿度に依存するため、リーク電流Ｉ１から湿度を推定することができ、湿度に応じて画像形成条件を適切に設定することができる。【選択図】図４
Bibliography:Application Number: JP20150007458