Exposure apparatus and image forming apparatus

Details Exposure apparatus and image forming apparatus Exposure apparatus and image forming apparatus

2005-12-01

2008-10-07

Pham, Hai C (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

Reexamination Certificate

active

07432945

ABSTRACT:
An exposure apparatus includes a line head and a rotatable photosensitive drum, which is exposed by light from the line head. The line head includes N (“N” being 2 or greater) EL element column. In each EL element column, the area S of a light-emitting pixel of the EL element is constant within a corresponding column. When the column number of the EL element columns is from 1 to N, the area of the light-emitting pixel of the EL element in each column is Si=S1/(2n−1) (where, “i” is the column number of each EL element column and a natural number from 1 to N, and “S1” is the area of the light-emitting pixel of the EL element of a first column). One or more EL elements selected from N EL elements within the N EL element columns perform exposure on the same unit drawing region on the photosensitive drum.

REFERENCES:
patent: 4314261 (1982-02-01), Martinage
patent: 4746935 (1988-05-01), Allen
patent: 4775896 (1988-10-01), Umeda et al.
patent: 2004/0125196 (2004-07-01), Nomura et al.
patent: 05-221021 (1993-08-01), None
patent: A-2003-054035 (2003-02-01), None
patent: 2003-341140 (2003-12-01), None

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