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:
Dec. 03, 2024
Filed:
Nov. 10, 2021
Hitoshi Kida, Kanagawa, JP;
Hitoshi Kida, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A head drive controller to drive a head to discharge a liquid, the head drive controller includes a drive waveform generator configured to generate a drive voltage waveform to drive the head, a switch coupled to the head and the drive waveform generator, the switch configured to select passing or non-passing of the drive voltage waveform generated by the drive waveform generator to the head. The drive voltage waveform includes a first expansion waveform element to expand a pressure chamber in the head, and a second expansion waveform element to expand the pressure chamber, the second expansion waveform element having a slew rate smaller than a slew rate of the first expansion waveform element.