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:
Mar. 31, 2020
Filed:
Jan. 08, 2019
Applicant:
Toshiba Tec Kabushiki Kaisha, Shinagawa-ku, Tokyo, JP;
Inventor:
Kazuhiro Hara, Numazu Shizuoka, JP;
Assignee:
TOSHIBA TEC KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/18 (2006.01); B41J 2/045 (2006.01); B41J 2/175 (2006.01); H01L 41/04 (2006.01);
U.S. Cl.
CPC ...
B41J 2/18 (2013.01); B41J 2/04548 (2013.01); B41J 2/04581 (2013.01); B41J 2/17596 (2013.01); H01L 41/042 (2013.01); B41J 2202/12 (2013.01);
Abstract
In accordance with an embodiment, a liquid circulation device comprises a plurality of piezoelectric pumps configured to circulate liquid in a replenishing tank to a liquid discharge head through an operation of a piezoelectric actuator thereof; a DC power supply; a switching circuit configured to switch an output of the DC power supply to supply a driving voltage to the piezoelectric actuator of the piezoelectric pump; and a control circuit configured to control the driving voltage by controlling a switching timing of the switching circuit.