Color electrophotographic copying process

Details Color electrophotographic copying process Color electrophotographic copying process

1985-08-30

1987-09-01

Braun, Fred L.

Photocopying

Including fiber optics

355 14E, G03G 1301, G03G 1501

Patent

active

046905413

ABSTRACT:
A color electrophotographic copying process utilizing the Carlson process. A colored original to be copied is color-separated and read by a solid-state image pickup device. Color compensation or gradation compensation is carried out on the basis of the data read by the solid-state image pickup device. When the color compensation is effected, amounts of masking are determined on the basis of the data read by the solid-state image pickup device, and the color-separated latent images are partially erased in an area-modulating manner dependent on the determined amounts of masking with an eraser having a light-emitting dot array. When the gradation compensation is effected, the latent images are partially erased with the eraser in an area-modulating manner dependent on the determined amounts of masking, or an appropriate gradation reproduction curve is selected on the basis of the data read by the solid-state image pickup device.

REFERENCES:
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patent: 4215930 (1980-08-01), Miyakawa et al.
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patent: 4239374 (1980-12-01), Tatsumi et al.
patent: 4318597 (1982-03-01), Kotani et al.
patent: 4469433 (1984-09-01), Kurata et al.

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