Numerical analysis of image defects in single component magnetic development in electrophotography

Tomoyuki Ito*, Hiroyuki Kawamoto, Hideki Okamoto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In order to cope with image defects observed in the electrophotography using the single-component magnetic development system, a two dimensional numerical simulation has been carried out considering effects of multiple physics. The electrostatic field generated by the bias voltage applied and the electric charge on the photoreceptor and the toner particles are calculated using the finite difference method. The pressure equation is also solved by the finite difference method to obtain the flow field induced by motion of the photoreceptor and the development sleeve. The magnetic field is expressed by superposition of fields created by two-dimensional magnetic dipoles to extrapolate measured magnetic flux density on the development sleeve. Total force exerted on each toner particle by those fields are calculated and motion is tracked considering adhesion onto solid surfaces to estimate density distribution of toner particles on the photoreceptor. Two types of image defects are simulated. One is low-density area observed near a white line with dark background. The other is a phenomenon that large particles contained in the development particles are intensively developed on a non-image area close to a solid patch. Countermeasure against the image defect is also simulated.

Original languageEnglish
Pages (from-to)418-425
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number2
Publication statusPublished - 2006 Feb
Externally publishedYes


  • Electrophotography
  • Electrostatic Force
  • Finite Difference
  • Information Processing Equipment
  • Magnetic Force
  • Single-Component Magnetic Development System

ASJC Scopus subject areas

  • Mechanical Engineering


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