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:
Jun. 06, 2017
Filed:
Aug. 16, 2016
Ryuichi Hayashi, Kanagawa, JP;
Ryuichi Hayashi, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A liquid droplet ejecting device is provided that includes a liquid droplet ejecting head having a nozzle, a pressure chamber that accommodates liquid and is in communication with the nozzle, and a piezoelectric element that is arranged to face the pressure chamber; a drive waveform generation unit configured to generate a drive waveform that drives the piezoelectric element and has a potential that varies with respect to a reference potential; a detection unit configured to detect a relationship between a detected potential of a residual oscillation waveform that is generated within the pressure chamber after driving the piezoelectric element and a first threshold corresponding to a potential higher than the reference potential; and a state determination unit configured to determine whether the nozzle and/or the pressure chamber is in an abnormal state based on the detected relationship between the detected potential and the first threshold.