Invention Publication
- Patent Title: Electrophotographic apparatus
- Patent Title (中): 电子照相设备
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Application No.: EP99119452.3Application Date: 1999-09-30
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Publication No.: EP0991262A2Publication Date: 2000-04-05
- Inventor: Yamazaki, Koji , Nakayama, Yuji , Kawada, Masaya , Ohwaki, Hironori
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: 30-2, 3-chome, Shimomaruko, Ohta-ku Tokyo JP
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: 30-2, 3-chome, Shimomaruko, Ohta-ku Tokyo JP
- Agency: Pellmann, Hans-Bernd, Dipl.-Ing.
- Priority: JP29441598 19981001
- Main IPC: H04N1/06
- IPC: H04N1/06
Abstract:
The present invention relates to an electrophotographic apparatus in which maximum potential difference ΔVD (volt) in a potential of a dark portion of the electrostatic image in the longitudinal direction, maximum potential difference ΔVL in a potential of a light portion of the electrostatic image in the longitudinal direction, a value a (1/volt) represented by (variation amount in density, in the longitudinal direction, in the image formed by developing the light portion with the developing means)/(the maximum potential difference ΔVD) and a value b (1/volt) represented by (variation amount in density, in the longitudinal direction, in the image formed by developing the light portion with the developing means)/(the maximum potential difference ΔVL) satisfy a relation: 0.3 ≤ a × ΔVD + b × ΔVL ≤ 0.3 in which 100 ≥ |ΔVD| ≥ 20 and 100 ≥ |ΔVL| ≥ 20.
Public/Granted literature
- EP0991262A3 Electrophotographic apparatus Public/Granted day:2003-04-09
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