Image formation apparatus exposing photoconductor according to i

Details Image formation apparatus exposing photoconductor according to i Image formation apparatus exposing photoconductor according to i

1997-03-12

1999-09-07

Vu, Kim Yen

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358455, 358471, 347131, 347254, B41B 1500, B41J 2385, H04N 140

Patent

active

059499630

ABSTRACT:
In a digital full color copying machine, one pixel on a photoconductor is divided into four subdivided small pixels. Functions a-d are assigned to each subdivided small pixel. Functions a-d are linear functions with density data as a parameter. The slope of functions a-d becomes smaller in sequential order. Exposure data of the four subdivided small pixels is calculated according to the density data of a pixel and functions a-d to expose each subdivided small pixel. A peak can be established in the exposure amount distribution to form a deeper latent image. Accordingly, resolution and graininess of the halftone area are improved.

REFERENCES:
patent: 4816863 (1989-03-01), Lee
patent: 5189441 (1993-02-01), Fukui et al.

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