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:
Nov. 01, 2011
Filed:
Jun. 11, 2009
Shinichi Miyazaki, Suwa, JP;
Katsunori Yamazaki, Matsumoto, JP;
Hiroyuki Yoshino, Matsumoto, JP;
Kinya Matsuzawa, Shiojiri, JP;
Shoichi Iino, Nirasaki, JP;
Shinichi Miyazaki, Suwa, JP;
Katsunori Yamazaki, Matsumoto, JP;
Hiroyuki Yoshino, Matsumoto, JP;
Kinya Matsuzawa, Shiojiri, JP;
Shoichi Iino, Nirasaki, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A load driving circuit that generates a desired voltage waveform to drive a load includes a target voltage waveform output section that outputs a target voltage waveform to be applied to the load. Power supply sections generate electrical power with voltage values different from each other. Negative feedback control sections between the power supply sections and the load supply electrical power from the corresponding power supply sections to the load and execute negative feedback control of a value of a voltage applied to the load for matching the voltage value and the target voltage waveform. A power supply connection section selects one of the power supply sections based on the value of the voltage applied to the load or the voltage value of the target voltage waveform and connects the selected power supply section to the load and disconnects the rest of the power supply sections from the load.