Image forming apparatus directly correcting an image data in res

Details Image forming apparatus directly correcting an image data in res Image forming apparatus directly correcting an image data in res

1993-10-19

1995-02-14

Reinhart, Mark J.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

355208, B41J 2435

Patent

active

053899555

ABSTRACT:
An image forming apparatus detects a potential of a latent image of a reference gradation pattern formed on a photosensitive member and controls the latent image potential so as to be fixed to maintain a good gradation characteristic. The apparatus comprises image data conversion means for converting input image data in accordance with conversion information, a RAM for storing electrostatic latent image potential data for an input coverage value in an initial condition, an optical system for exposing a reference pattern of an input coverage value on the photosensitive member to light to form an electrostatic latent image, an electrostatic potential sensor for detecting a potential of the electrostatic latent image of the reference pattern formed by the optical system, and means for comparing such detected potential data and potential data stored in the RAM and modifying, when the difference between them is greater than a predetermined value, the conversion information for the image data conversion means so that the electrostatic latent image potential at a same input image data value may be substantially equal to the electrostatic latent image potential in the predetermined condition.

REFERENCES:
patent: 4571068 (1986-02-01), Tarumi et al.
patent: 4619522 (1986-10-01), Imai
patent: 5237369 (1993-08-01), Maruta et al.

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