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. 27, 2018
Filed:
Jun. 08, 2016
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Ryutaro Kusunoki, Mishima Shizuoka, JP;
Shuhei Yokoyama, Mishima Shizuoka, JP;
Meng Fei Wong, Mishima Shizuoka, JP;
TOSHIBA TEC KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An ink jet head includes a pressure chamber connected to a nozzle, an actuator configured to cause liquid in the pressure chamber to be ejected from the nozzle by deforming a wall of the pressure chamber, and a drive circuit configured to apply voltage to the actuator to drive the actuator. When a droplet of the liquid is ejected from the nozzle, the voltage applied to the actuator is changed from a first value to a second value that causes the pressure chamber to expand, and then changed from a third value that is equal to the second value or between the first value and the second value to the first value after a time period λ, which is a primary natural oscillation period of the actuator when the pressure chamber and the nozzle are filled with the liquid.