Image formation apparatus using an electrophotographic process

Details Image formation apparatus using an electrophotographic process Image formation apparatus using an electrophotographic process

2008-07-22

2008-07-22

Dote, Janis L (Department: 1795)

Electrophotography

Image formation

Photoconductive member

C430S058650, C430S058850, C430S059200, C399S168000, C399S176000, C347S130000, C347S131000

Reexamination Certificate

active

07403735

ABSTRACT:
An image formation apparatus using an elecrophotographic process for obtaining a high quality image with tone value R2of equal to or more than 0.98 is provided. The resolution for light-writing is equal to or more than 1200 dpi and/or light-writing is performed based on image data formed by applying halftone processing at a line frequency of equal to or more than 200 lpi. Light-writing means is accomplished with a laser light beam with a beam diameter equal to or less than 35 μm. The photoconductor includes a charge generating layer containing a charge generating material and a charge transfer layer containing a charge transfer material laminated on a conductive support. The ionization potential of the charge generating material Ip(CG) and ionization potential of the charge transfer material Ip(CT) satisfy the relationship of Ip(CG)≧Ip(CT).

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