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. 27, 2022
Filed:
Nov. 20, 2020
Satomi Araki, Kanagawa, JP;
Satomi Araki, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A liquid discharge apparatus includes a liquid discharge head and circuitry. The liquid discharge head includes a nozzle to discharge liquid. The circuitry is configured to: generate and output a common drive waveform including a drive pulse for discharging liquid from the nozzle of the liquid discharge head; select a waveform portion of the drive pulse to be applied to a pressure generating element of the liquid discharge head; and output a selection signal for designating the waveform portion selected. The drive pulse includes at least an expansion waveform element for expanding a pressure chamber of the liquid discharge head and a holding waveform element for holding a state expanded by the expansion waveform element. The selection signal includes a deselection signal for deselecting at least a part of a waveform portion preceding the expansion waveform element having, as a terminal, a state held by the holding waveform element.