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:
Oct. 26, 2010
Filed:
Jul. 21, 2008
Jun Watanabe, Tokyo, JP;
Yuji Ieiri, Kanagawa, JP;
Kohichi Sadano, Kanagawa, JP;
Tsuyoshi Yamada, Kanagawa, JP;
Jun Watanabe, Tokyo, JP;
Yuji Ieiri, Kanagawa, JP;
Kohichi Sadano, Kanagawa, JP;
Tsuyoshi Yamada, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image process control unit processing an image data and generating a control signal, and a drive pattern generation unit to generate a drive pattern to drive a recording head, based on the control signal, the drive pattern generation unit generating at least a first drive pattern and a second drive pattern which is different from the first drive pattern. The drive pattern generation unit sets a reference potential of the second drive pattern as a target reference potential and applying a pattern end of the first drive pattern to one of a pull-up pattern and a pull-down pattern operation before the second drive pattern is performed, wherein the drive pattern generation unit generates one of the pull-up pattern and the pull-down pattern based on a slope value obtained by comparing the target reference potential and the end potential.