Printer

Details Printer Printer

1999-04-05

2000-08-22

Brase, Sandra

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

358401, B41J 2385, G01D 1506, G03G 1501

Patent

active

061080179

ABSTRACT:
A color image recording apparatus operates in a color print mode and in a monochrome printing mode. A set of color print heads are driven in accordance with corresponding color image data. A monochrome print head is driven in accordance with black image data. A controller transmits in parallel or in serial the color image data and the black image data to the corresponding print heads in a color printing mode. The controller transmits the black image data faster in the monochrome printing mode than in the color printing mode, thereby increasing printing speed. The controller may include signal processing circuits such as compressing circuits and expanding circuit for the respective color image data and black image data. In the monochrome printing mode, the controller divides the black image data into a plurality of segments and supplies the segments in parallel to the signal processing circuits. The signal processing circuits process the segments and supply the processed data to the monochrome print head in a predetermined sequence, thereby increasing printing speed.

REFERENCES:
patent: 4893179 (1990-01-01), Ito
patent: 4905091 (1990-02-01), Suzuki et al.
patent: 5003494 (1991-03-01), Ng
patent: 5175632 (1992-12-01), Hayashi et al.
patent: 5627653 (1997-05-01), Nakazato
patent: 5646749 (1997-07-01), Omi et al.

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