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. 14, 2012
Filed:
Jan. 17, 2007
Atsushi Oshima, Shiojiri, JP;
Kunio Tabata, Shiojiri, JP;
Osamu Shinkawa, Chino, JP;
Toshiyuki Suzuki, Shiojiri, JP;
Tomoki Hatano, Higashiomi, JP;
Atsushi Oshima, Shiojiri, JP;
Kunio Tabata, Shiojiri, JP;
Osamu Shinkawa, Chino, JP;
Toshiyuki Suzuki, Shiojiri, JP;
Tomoki Hatano, Higashiomi, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A head drive device of an inkjet printer having a nozzles and corresponding actuators that jet liquid drops. A drive section that generates a drive signal to the actuators. The head drive device includes a drive waveform signal which is used as a reference of a signal to control drive of the actuators. A modulating section modulates a pulse of a drive waveform signal generated by the drive waveform generating system. A low pass filter smoothes a power-amplified modulated signal subjected to the power amplification by the digital power amplifier and supplies the signal as a drive signal to the actuators. A frequency characteristics adjusting section adjusts frequency characteristics of the low pass filter as a function of the number of the actuators.