The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 2005
Filed:
Apr. 15, 2003
Marc Alan Herwald, Lexington, KY (US);
Gretchen Yvonne Gibson, Lexington, KY (US);
Michael Anthony Marra, Iii, Lexington, KY (US);
Joseph Kamal Yackzan, Lexington, KY (US);
Marc Alan Herwald, Lexington, KY (US);
Gretchen Yvonne Gibson, Lexington, KY (US);
Michael Anthony Marra, III, Lexington, KY (US);
Joseph Kamal Yackzan, Lexington, KY (US);
Lexmark International, Inc., Leington, KY (US);
Abstract
A scanning operation is synchronized with the motion of a scan mechanism. Encoder signals indicative of a position of the scan mechanism relative to a scan platen or an object being scanned are received. These encoder signals may include a single channel phase signals are channel A and channel B phase signals. Transitions of the encoder signals are detected. Scan pulses for triggering a scan operation by a scan element are generated based on transitions of the encoder signals. Differences in the encoder signal resolution and a desired scan resolution are compensated for in the generation of the scan pulses. A transfer signal is generated in synchronization with the scan pulses for controlling output of data from the scan element. Variations of the velocity of the scan mechanism cause variations of the frequency at which the scan pulses are generated. Variations in the velocity of the scan mechanism are accounted for during this synchronization by varying the duration of the transfer state of the transfer signal in relation to the variations of the scan pulse frequency. The duration of the exposure state of transfer signal is kept constant, ensuring a constant exposure time for the scanning device.