Electrophotographic apparatus and electrophotograph image...

Details Electrophotographic apparatus and electrophotograph image... Electrophotographic apparatus and electrophotograph image...

2006-01-31

2006-01-31

Lee, Thomas D. (Department: 2624)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003200

Reexamination Certificate

active

06992795

ABSTRACT:
An electrophotographic apparatus which represents halftone through use of halftone spots formed of a plurality of dots, to thereby reproduce an image and which forms a virtual development region of a predetermined area at a predetermined location within dots by means of exposure of a photosensitive drum to a beam and which reproduces a real development region by causing toner to adhere to the virtual development region. In order to prevent an area narrower than a predetermined width from arising in the virtual development region, an area which is originally designated to become narrow is formed into an area of certain width, to thereby prevent formation of a much narrower real development region, which would otherwise be caused by an excessively low surface potential of the narrow area. The area of halftone spots is partially increased in the virtual development region at a single gray-scale level.

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