Method and apparatus for generating a dot clock signal for contr

Details Method and apparatus for generating a dot clock signal for contr Method and apparatus for generating a dot clock signal for contr

1997-12-18

2000-06-20

Barlow, John

Incremental printing of symbolic information

Ink jet

Medium and processing means

347 43, B41J 214

Patent

active

06076922&

ABSTRACT:
An ink jet printer includes an image transfer drum and a print head for ejecting drops of ink toward the image transfer drum as the drum rotates relative to the print head undergo. A control mechanism controls operation of the print head relative to rotation of the drum in response to a dot clock signal. The control mechanism includes a position encoder which generates an encoder signal at a frequency dependent on rotation of the image transfer drum and a digital phase locked loop circuit which receives the encoder signal and generates the dot clock signal at a frequency equal to the frequency of the encoder signal multiplied by a rational number.

REFERENCES:
patent: 4833375 (1989-05-01), Del Signore, II
patent: 5381170 (1995-01-01), Mutoh
patent: 5446358 (1995-08-01), Nakata
patent: 5600352 (1997-02-01), Knierim et al.
patent: 5659587 (1997-08-01), Knierim

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