Seiko Epson Corporation

Screen Holdings Co., Ltd.

Naoki Yonekubo

Toshiki Usui

Kiyoomi Mitsuki

Toshiyuki Yamagata

Kinya Ozawa

Koji Takano

A liquid ejecting device includes: a piezoelectric element that is deformed by applying at least one drive waveform among a plurality of drive waveforms to the piezoelectric element, the plurality of drive waveforms including a first drive waveform and a second drive waveform; a cavity that is filled with a liquid and is increased or decreased in internal pressure due to deformation of the piezoelectric element; a nozzle that communicates with the cavity, and ejects the liquid as a liquid droplet; and a selection section that selects at least one drive waveform from the plurality of drive waveforms, the liquid droplet including a first liquid droplet ejected when the first drive waveform has been selected, and a second liquid droplet ejected when the second drive waveform has been selected, an ejection volume of the first liquid droplet being almost equal to an ejection volume of the second liquid droplet.

Liquid ejecting device, head unit, and liquid ejecting method

A drive signal includes a first drive signal and a second drive signal. The first drive signal includes a prior pulse section including a first contraction element and a discharging pulse section including a first expansion element pulling in a meniscus and the second contraction element discharging a droplet of liquid from the nozzle orifice. The second drive signal includes the discharging pulse section and a vibration control pulse section including a second expansion element controlling a residual vibration of the meniscus. A piezoelectric element is driven with the first drive signal when viscosity of the liquid is equal to or more than a first set value and is driven with the second drive signal when the viscosity is equal to or less than a second set value.

Control method of and control device for controlling liquid ejection head, and liquid ejecting apparatus

A contraction portion of a vibration pulse includes a first contraction element which occurs subsequent to an expansion portion, a contraction maintaining element which follows the first contraction element, and a second contraction element which follows the contraction maintaining element, and when a time from a start point time of the expansion portion to an end point time of the expansion portion is set as t, a time from the end point time of the expansion portion to a start point time of the contraction portion is set as t, and a natural vibration period of ink in an ink flow path including a pressure chamber is set as Tc, the start point time (t+t) of the contraction portion is set to be in the range of any one of the following expressions (1) and (2).(t+t)&#x3c;t+3Tc/8 &#x2003;&#x2003;(1)(t+t)&#x3e;t+5Tc/8 &#x2003;&#x2003;(2)

Growing community of inventors

Shiojiri, Japan

Naoki Yonekubo