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:
Dec. 14, 2004
Filed:
Dec. 05, 2002
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/938 ; H02K 3/300 ; H02K 3/500 ; H02K 7/00 ; H03M 1/76 ;
U.S. Cl.
CPC ...
B41J 2/938 ; H02K 3/300 ; H02K 3/500 ; H02K 7/00 ; H03M 1/76 ;
Abstract
An inkjet head driving circuit driving piezoelectric actuators for ink ejection provided on an inkjet head H includes one D/A converter that converts a digital signal into an analog voltage and outputs the analog voltage, and a waveform generating portion into which an output voltage of the D/A converter is input, and which generates a voltage rising waveform when the output voltage of the D/A converter is larger than a predetermined potential that is midway between a maximum value and a minimum value of that output voltage, and generates a voltage rising waveform when the output voltage of the D/A converter is smaller than the predetermined potential.