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:
Jun. 19, 2012
Filed:
Jan. 25, 2007
Toshiyuki Suzuki, Shiojiri, JP;
Kunio Tabata, Shiojiri, JP;
Osamu Shinkawa, Chino, JP;
Tomoki Hatano, Higashiomi, JP;
Atsushi Oshima, Shiojiri, JP;
Toshiyuki Suzuki, Shiojiri, JP;
Kunio Tabata, Shiojiri, JP;
Osamu Shinkawa, Chino, JP;
Tomoki Hatano, Higashiomi, JP;
Atsushi Oshima, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
With an appropriate signal transmission form, a drive pulse output circuit is mounted to an ink jet head, so that waveform distortion of an actuator drive pulse for jet of ink drops is inhibited or prevented. Modulated signal data in memory is read to output a modulated signal, which is power-amplified by a digital power amplifier. The amplified digital signal is smoothed to be output to an actuator as a drive pulse. As a result, the digital power amplifier having high amplification efficiency efficiently amplifies the power of the modulated signal, thereby eliminating the need to use a cooling unit. The drive pulse output circuit can be mounted to the ink jet heads, thereby shortening the transmission path of an actuator drive pulse, which inhibits or prevents any waveform distortion of the drive pulse. The transmission of the modulated signal data DATA is implemented with a low frequency.