Recording image density control method for electrophotography

Details Recording image density control method for electrophotography Recording image density control method for electrophotography

1982-11-04

1987-01-27

Grimley, Arthur T.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 14D, 355 14C, 430 30, G03G 1500

Patent

active

046391177

ABSTRACT:
A recording image density control method for electrophotography comprising the steps of forming at least two latent electrostatic image patterns with different electric potentials on the surface of a photoconductor; developing the latent electrostatic images patterns to toner image patterns by use of toner contained in the developer; detecting data relevant to image density for each developed toner image pattern (such as the image density of each developed toner image pattern, for instance, by a toner image pattern, for instance, by a photosensor), with a different resolution for each image pattern; determining the ratio of the data for one image pattern to the data for the other image pattern by A/D conversion; and controlling at least one recording image density controlling parameter, such as the amount of the toner supplied to a development apparatus, in accordance with the ratio for controlling recording image density, whereby recording image density can be controlled.

REFERENCES:
patent: 3922380 (1975-11-01), Rowell et al.
patent: 4026643 (1977-05-01), Bergman
patent: 4277162 (1981-07-01), Kasahara et al.
patent: 4326646 (1982-04-01), Lavery et al.
patent: 4341461 (1982-07-01), Fantozzi
patent: 4372672 (1983-02-01), Pries

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