Lexmark International, Inc.

Marvell International Limited

Karl Mark Thompson

Mark Lane Mayberry

Douglas G Keithley

Keith Bryan Hardin

Chengwu Cui

Zachary Nathan Fister

Christopher Wilson Case

Joseph Kamal Yackzan

Bennett Fornal

A method of calibrating a document scanner contact image sensor scan bar having an LED array to increase LED sensor array output and/or reduce total color scan line cycle time.

Method of calibrating a contact image sensor scan bar in a document scanner

A method for reducing electromagnetic emissions by an image scanner comprises cyclically dithering a frequency of a clock signal of the image scanner by repeated dither cycles, determining a phase of the dither cycle when a scan pass of a page of a document commences; and commencing all subsequent scan passes of the page of the document at a particular phase shift from the determined phase of the dither cycle.

Method and apparatus for scanning an image

A method for adjusting a controller of a scanner includes obtaining a scan of a predefined image. The method further includes moving the sensor-element signals of the control signal pattern generated by the controller earlier in the pattern by at least one unit and obtaining an additional scan. The obtaining and moving are repeated until a comparison of a latest additional scan to the image is worse than a comparison of a second-latest additional scan to the image. Another method obtains a noise-reducing heuristic which modifies a time parameter of a sensor-element signal. A set of repeated scans of a same scan line is obtained, noise is measured there from, the time parameter is modified by one predetermined unit, and the process repeats until the noise measured from the latest set of repeated scans is worse than that from the second-latest set of repeated scans.

Method for adjusting a controller of a scanner

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Midway, KY, United States of America

Karl Mark Thompson