Seiko Epson Corporation

Junhua Zhang

Hitotoshi Kimura

Minoru Usui

Kinya Ozawa

Akihisa Wanibe

Akira Ichihashi

Minoru Yajima

Takahiro Katakura

Tomoaki Takahashi

Yuji Aoki

Satoru Hosono

Toshihisa Saruta

Kenichi Seguchi

Takayoshi Katsumura

Yoshiyuki Suzuki

A circulation head includes an upstream port and a downstream port that are in communication with a pressure chamber, and includes three ink tanks (first to third tanks). Each of the ink tanks (the first to third tanks) includes an ink inlet/outlet port that is in communication with the upstream port and the downstream port, and an opening/closing valve that independently opens and closes the ink inlet/outlet port of each of the ink tanks (the first to third tanks) with respect to the upstream port and the downstream port.

Liquid ejection device

A channel structure includes a channel is formed in a channel member and a plurality of openings that allow the channel to communicate with an outside. The plurality of openings are closed by respective lid members. At least one of the lid members that closes at least one of the plurality of openings has air permeability.

Liquid discharge head and channel structure

A method for driving a liquid ejecting apparatus is provided. The apparatus includes a liquid ejecting head having nozzles in a nozzle surface and being configured to eject a liquid from the nozzles, a wiper being used for wiping the nozzle surface, and a maintenance liquid supply mechanism being configured to supply a maintenance liquid with which it is possible to suppress deterioration of recovery performance of, among the nozzles, a defective nozzle from which the liquid is not ejected properly. The method includes: a first liquid ejection of performing liquid ejecting operation to eject the liquid from the nozzles toward a medium; a wiping of performing wiping operation to wipe the nozzle surface by means of the wiper, with the liquid ejecting operation suspended, and put the maintenance liquid into the nozzles; and a second liquid ejection of resuming the liquid ejecting operation after the wiping.

Liquid ejecting apparatus driving method, and liquid ejecting apparatus

A liquid ejecting apparatus includes a recording head including a plurality of nozzles from which liquid is ejected, a plurality of pressure chambers which communicate with each nozzle, respectively, a piezoelectric element which causes liquid to be ejected from the nozzle by causing a pressure fluctuation in the liquid in the pressure chamber, and a printer controller which is connected to the piezoelectric element through an individual signal line, and supplies a driving signal which drives the piezoelectric element through the individual signal line. The individual signal line is provided as many as n times (here, n is natural number of 2 or more) or more of the number of pressure chambers.

Liquid ejecting apparatus

A liquid ejecting apparatus includes a liquid ejecting head that is provided with a plurality of nozzle openings that discharge a liquid, and pressure generation units that generate pressure changes in pressure generation chambers that are respectively in communication with the nozzle openings, a detection unit that detects a discharge fault of liquid droplets of the liquid ejecting head for each of the nozzle openings, and a control unit that controls the pressure generation units, in which the control unit has a discharge prohibition mode in which the driving of a pressure generation unit that corresponds to a nozzle opening in which a discharge fault is detected, is prohibited after the corresponding discharge fault is detected while recording is underway.

Liquid ejecting apparatus, control device, recording system, and program

A method for manufacturing a liquid ejecting head including a laminate formed of a flow path substrate having a flow path communicating with nozzle openings that eject a liquid, a first electrode, a piezoelectric layer, and a second electrode, the method including stacking the first electrode, the piezoelectric material, the second electrode, and a reinforcing member on top of one another to form a laminate; heating the laminate to form a piezoelectric layer made of the piezoelectric material; bonding the laminate to the flow path substrate on a first electrode side; and removing the reinforcing member.

Method for manufacturing liquid ejecting head

A liquid ejecting apparatus includes a liquid ejecting head in which liquid is ejected from a nozzle as liquid droplets using a driving signal generated by a driving signal generation unit, wherein the driving signal generation unit fits a difference between a maximum voltage and a minimum voltage, and generates a first driving signal that is transmitted when an ambient temperature is within a predetermined low temperature range, and a second driving signal that is transmitted when the temperature is within a predetermined high temperature range, further the first and second driving signals include a first element that forms a liquid column by pressurizing the pressure chamber and projecting the liquid in the nozzle, and a second element that projects the pressure chamber in a projecting direction of the liquid column from a position where a liquid surface inside the nozzle is connected to an internal surface of the nozzle.

When a nozzle abnormality detecting mechanism detects an abnormality of the nozzle, in the maintenance process of causing the drive waveform to be applied plural times to the actuator corresponding to the nozzle that the detecting mechanism detects as being abnormal, and thereby causing the ejecting operation to be performed, at least a first-time drive waveform applied to the actuator is a flushing pulse which causes a meniscus in the nozzle not to be positively attracted from an initial position to the pressure chamber, but causes the meniscus to be extruded to the ejection side and thereby causes the liquid to be ejected from the nozzle.

Liquid ejecting apparatus, control method of liquid ejecting head, and control method of liquid ejecting apparatus

The degree of thickening of ink for each of nozzles based on dot pattern data is calculated based on a thickening value Z(n+1)=Z(n)&#xd7;a&#xd7;bs&#xd7;bm&#xd7;bl, and information the dot pattern data corresponding to the nozzle, which indicates that small dots are formed in when the thickening value is equal to or greater than a threshold is replaced with information indicating that middle dots which are larger than the small dots are formed.

Liquid discharge apparatus, control method of liquid discharge apparatus, and device driver, and printing system

The degree of thickening of ink for each of nozzles based on dot pattern data is calculated based on a thickening value Z (n+1)=Z (n)&#xd7;a&#xd7;bs&#xd7;bm&#xd7;bl, and information the dot pattern data corresponding to the nozzle, which indicates that small dots are formed in when the thickening value is equal to or greater than a threshold is replaced with information indicating that middle dots which are larger than the small dots are formed. On the other hand, in a case where the thickening value is returned to be smaller than the threshold (a previous state) when after the thickening value becomes equal to or greater than the threshold, information of the dot pattern data corresponding to the nozzle, which indicates that the small dots are formed is maintained as it is without being replaced.

Line type liquid discharge apparatus, control method of line type liquid discharge apparatus, and device driver, and printing system

By providing a rotating body which supports three-dimensional recording media on a support surface in a direction which intersects with a gravity direction and which has a rotating shaft in the direction which intersects with the support surface, and a recording head which carries out recording onto recording media by discharging ink in a direction which intersects with the rotating shaft, recording is carried out with high quality with respect to the recording media while firmly supporting the three-dimensional recording media.

Recording apparatus

An ink jet type recording head includes a plurality of pressure generation chambers which are filled with ink, and piezoelectric elements which eject ink droplet through nozzle openings which are provided so as to correspond to each pressure generation chamber by applying pressure to the ink in each pressure generation chamber. The pressure generation chamber has a shape such that the piezoelectric element in the opposite side to a protrusion side in which at least a portion of the piezoelectric element protrudes out of the pressure generation chamber is deformed more easily than that in the protrusion side.

Liquid ejecting head and liquid ejecting apparatus

Provided is a manufacturing method of a liquid ejecting head having a flow-path forming substrate in which a liquid flow path is provided to communicate with a nozzle opening through which liquid is discharged. The method includes performing wet etching on both surfaces of the flow-path forming substrate and forming the liquid flow path by removing a burr that is formed when the wet etching is performed on the flow-path forming substrate.

Manufacturing method of liquid ejecting head

A maintenance pulse is a pulsed waveform that includes an expansion element that causes a pressure chamber to expand, a contraction element that causes the pressure chamber that is expanded by the expansion element to contract, and a reexpansion element that causes the pressure chamber that is contracted by the contraction element to expand again, and satisfies the following condition (1) when a time from the beginning of the contraction element to the beginning of the reexpansion element is given the term T1, and a specific vibration period that is caused in the liquid inside the pressure chamber is given the term Tc.1.2&#xd7;1&#x3c;1.5&#xd7;&#x2003;&#x2003;(1)

A time from a start end of a contraction portion of a first middle dot drive pulse of a first drive signal to a start end of the contraction portion of a second middle dot drive pulse of a second drive signal is set to Tc/2 or more and Tc or less in the same unit period. In addition, a time from a start end of a preliminary portion of a first small dot drive pulse to a start end of a preliminary portion of a second small dot drive pulse is set to Tc or more. Thus, while a piezoelectric vibrator corresponding to the other side of adjacent nozzles is driven by the second drive signal, a piezoelectric vibrator corresponding to one side of adjacent nozzles is driven by the first drive signal.

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Shiojiri, Japan

Junhua Zhang