Fluid ejection device, driving method of fluid ejection device, and operating instrument

Patent metadata

Field	Value
Publication number	US-8998938-B2
Application number	US-56815609-A
Country	US
Kind code	B2
Filing date	Sep 28, 2009
Priority date	Oct 1, 2008
Publication date	Apr 7, 2015
Grant date	Apr 7, 2015

Abstract

A fluid ejection device includes: a fluid chamber whose capacity is variable; an inlet flow path and an outlet flow path communicating with the fluid chamber; a capacity changing unit which changes the capacity of the fluid chamber; a fluid supplying unit which supplies fluid to the inlet flow path; a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber; a vibrating unit which vibrates a component in the vicinity of the fluid ejection opening; a vibration detecting unit which detects the level of vibration of the component in the vicinity of the fluid ejection opening; and an operation control unit which controls operation of the capacity changing unit based on the level of the vibration detected by the vibration detecting unit.

First claim

What is claimed is:

1. A fluid ejection device comprising:
a fluid chamber whose capacity is variable;
an inlet flow path and an outlet flow path communicating with the fluid chamber;
a capacity changing unit which changes the capacity of the fluid chamber, the capacity changing unit including a piezoelectric element;
a fluid supplying unit which supplies fluid to the inlet flow path;
a nozzle including a fluid ejection opening disposed at an end of the outlet flow path op…

Assignees

• Seto Takeshi
• Kawasumi Kazuo
• Hama Yasuyoshi
• Kojima Hideki
• Ono Yasuhiro
• Seiko Epson Corp

Inventors

• Seto Takeshi
• Kawasumi Kazuo
• Hama Yasuyoshi
• Kojima Hideki
• Ono Yasuhiro

Classifications

• A61B17/3203 Primary

  Human Necessities · mapped topic