Color balance adjusting apparatus for full-color copier

Details Color balance adjusting apparatus for full-color copier Color balance adjusting apparatus for full-color copier

1993-07-30

1994-08-30

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355208, 355246, 355327, 358461, G03G 2100

Patent

active

053432827

ABSTRACT:
A color balance adjusting apparatus is used for a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image. The color balance adjusting apparatus includes an infrared sensor for detecting toner density of the toner image formed with a toner having any one color of the first, second and third colors. The apparatus further includes automatic adjustment means which determines a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and which determines optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity. Using this apparatus, automatic adjustment of the color balance for each copy mode can be effected in a short time with lesser consumption of electricity and supplies.

REFERENCES:
patent: 4277162 (1981-07-01), Kasahara et al.
patent: 4989043 (1991-01-01), Suzuki et al.
patent: 5005049 (1991-04-01), Matsushita
patent: 5206686 (1993-04-01), Fukui et al.
patent: 5210572 (1993-05-01), MacDonald et al.

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