Method for determining sampling timing and image reading...

Details Method for determining sampling timing and image reading... Method for determining sampling timing and image reading...

2006-04-12

2010-06-01

Paik, Steven S (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

C345S213000, C348S537000

Reexamination Certificate

active

07726569

ABSTRACT:
An image reading apparatus comprises: a photoelectric converter that converts image data into an electric signal and outputs the image data; a clock controller that generates a plurality of sampling signals having different phases to sample a level of an output signal of the photoelectric converter; a phase determination unit that compares signal levels in a sampling order, each of the signals obtained by sampling, using a respective sampling signal, the output signal of the photoelectric converter, so as to determine an optimum phase of the plurality of the sampling signals when a condition is fulfilled in which an absolute value of a variation between signal levels being compared is less than a threshold value; a storage unit in which the optimum phase is stored; and a sampling unit that samples the output signal of the photoelectric converter using the sampling signal having the optimum phase.

REFERENCES:
patent: 6340993 (2002-01-01), Hasegawa et al.
patent: 2003/0156107 (2003-08-01), Sakashita
patent: 2004/0100583 (2004-05-01), Yoneno
patent: 2005/0162708 (2005-07-01), Takahashi
patent: 2005/0275436 (2005-12-01), Shih et al.
patent: A-06-255146 (1994-08-01), None
patent: A-10-290399 (1998-10-01), None

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