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:
Aug. 21, 2001
Filed:
Jul. 10, 2000
Fuminori Takizawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A drive method and a drive of an ink-jet recording head which is capable of improving recording speed widely, and which is capable of materializing high quality recording without extending recording time even though the number of gradations increase, are provided. One-printing period T is divided into a plurality of segment T,, T,. The method and device cause plural kinds of drive-voltage-waveform SD,to SD,to be generated in accordance with size of an ink-drop in every respective segment T,, T,. The method and device select arbitrary drive-voltage-waveforms from among the plural kinds of drive-voltage-waveforms SD,to SD,supplied in every respective segment T,, T,to supply to a vibration generator in every respective segment T,, T,. Thus it becomes possible to obtain a plurality of gradations during one-printing period T. It is capable of obtaining high quality printing image while improving recording speed widely. Further, printing time is not extended even though the number of gradations increase.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile