Color image forming apparatus having mono-color image forming fu

Details Color image forming apparatus having mono-color image forming fu Color image forming apparatus having mono-color image forming fu

1992-02-28

1994-04-26

Grimley, A. T.

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Contact printing

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355203, 355209, 358529, G03G 1500

Patent

active

053071352

ABSTRACT:
This invention relates to a color image forming apparatus which is capable of forming a mono-color image based on the color image input data. The apparatus includes a circuit for determining the highest value of the image input data. This circuit is called the highest value image data outputting circuit. The highest input color data value is found by comparing the values of the image data for the three primary colors (yellow, magenta and cyan) and outputting the value for the color having the highest input value. The apparatus further includes a mono-color image forming portion which forms a mono-colored image based on the output of the highest value image data outputting circuit.

REFERENCES:
patent: 4668978 (1987-05-01), Gokita
patent: 4893179 (1990-01-01), Ito
patent: 4924413 (1990-05-01), Suwannukul
patent: 4941184 (1990-07-01), Sato
patent: 5014093 (1991-05-01), Ng
Patent Abstracts of Japan, vol. 14, No. 530 (P-1134) Nov. 21, 1990, & JP-A-22 23 966 (Canon) Sep. 6, 1990.

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