Patent ID: 6745626
Filing Date: 2004-06-08
Classification: B41J,G01F

Abstract:
A liquid detection device attached on a liquid container for detecting a liquid consumption status of the liquid contained in the liquid container, the liquid detection device comprising:a vibrating section symmetrical about a center thereof; a piezoelectric element; a vibrating plate on which said piezoelectric element is mounted, said vibrating plate including a vibrating region having an upper surface and a lower surface, a part of said lower surface contacting the liquid contained in the liquid container when the module is mounted on the liquid container; an upper electrode disposed on an upper surface of said piezoelectric element and extending from said vibrating region of said vibrating plate towards the outside of said vibrating region; and a lower electrode disposed on a lower surface of said piezoelectric element and extending from said vibrating region of said vibrating plate towards the outside of said vibrating region, said lower electrode extending substantially on the same plane as said upper electrode extends on.