Image scanner and image scanning method

Details Image scanner and image scanning method Image scanner and image scanning method

1993-06-16

1995-12-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358409, 358412, 358496, H04N 104, H04N 136

Patent

active

054734452

ABSTRACT:
In a high-speed image scanner, a driving method is proposed which needs no timing adjustment between the sensor driving pulse and the motor drive pulse required when the motor shifts from an accelerated state to a constant-speed state. The period of the sensor driving pulse is selected to be equal to or 1/N (N=integer) of that of the motor drive pulse at the time of constant-speed operation, and the phases of the sensor driving pulse and motor drive pulse are controlled independently of each other. Thus, even though the sensor driving pulse and the motor drive pulse are out of good timing, each line of the image can be surely read.

REFERENCES:
patent: 4663672 (1987-05-01), Sakamoto
patent: 4992888 (1991-02-01), Nagashima
patent: 5278675 (1994-01-01), Kamiyama

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