Seiko Epson Corporation

Shushi Makita

Kinya Ozawa

Ryoichi Tanaka

Akihito Sao

Shinichi Itaya

Masako Fukuda

Noriaki Yamashita

Ryosuke Tsuchihashi

A liquid discharge apparatus includes a drive signal generation section configured to generate a plurality of drive pulses that is supplied to a pressure generation unit to change a pressure in liquid in a pressure chamber communicated with a nozzle. The plurality of drive pulses include: first and second discharge pulses to discharge liquid from the nozzle; and first and second micro-vibration pulses to not discharge liquid. The first discharge pulse and the first micro-vibration pulse are included in a first period included in a repetition cycle. The second discharge pulse and the second micro-vibration pulse are included in a second period included in the repetition cycle and later than the first period. The length from a start of the first period to the first micro-vibration pulse differs from the length from a start of the second period to the second micro-vibration pulse.

Liquid discharge apparatus

A liquid discharge apparatus includes a filter configured to filter liquid to be discharged from a nozzle, a vibration detection mechanism configured to detect vibration of ink in an ink flow path generated by the driving of a piezoelectric element as an actuator; and a calculation circuit configured to obtain a detection value obtained by the vibration detection mechanism and perform calculation by using the detection value, wherein the vibration detection mechanism detects vibration of n (1&#x3c;n&#x2266;m) nozzles out of m nozzles included in the recording head, and the calculation circuit determines a state of the filter on the basis of a result of the calculation performed by using the detection value obtained by the vibration detection mechanism.

Liquid discharge apparatus and method of controlling the same

A nonaqueous ink composition for ink jet recording includes a solvent represented by general formula (1) and having a hydrophile-lipophile balance value of 10.5 to 20.0: where Rdenotes an alkyl group having 1 to 4 carbon atoms.

Nonaqueous ink composition for ink jet recording and ink jet recording method

An ink composition for ink jet textile printing at least includes a disperse dye and a solvent represented by the following Formula (1): (in Formula (1), Rdenotes an alkyl group having 1 to 4 carbon atoms). The solvent represented by the Formula (1) has an HLB value of 10.5 or more and 20.0 or less.

Ink composition for ink jet textile printing and ink jet textile printing process

A liquid ejecting head includes a nozzle; a pressure chamber communicating with the nozzle; a pressure chamber substrate having pressure chambers defined by partition walls; a pressure generator generating pressure change in liquid inside the pressure chamber; and a bottom joined to the pressure chamber substrate by adhesive; and an organic solvent-based ink ejected from the nozzle by driving a piezoelectric element and generating the pressure change in the pressure chamber, and when a width of the pressure chamber in an arrangement direction of the pressure chambers is W and a width of the adhesive in the arrangement direction of the pressure chambers in a state where the adhesive has flowed out from between a lower end portion of the partition wall and the bottom to the pressure chamber side and is then solidified is L, the following expression is satisfied, 0.05&#x2266;L/W&#x2266;0.3.

Liquid ejecting head and liquid ejecting apparatus

A piezoelectric element changes a pressure in a pressure chamber and ejects ink from nozzles. A driving signal generating section generates a driving signal that includes an ejection pulse PA and PB which eject ink to a piezoelectric element, and a first transition element between the ejection pulse PA and PB. A starting end and a terminal end of the ejection pulse PA are set to a reference electric potential VA, and a starting end and a terminal end of an ejection pulse PB are set to a reference electric potential VB. An electric potential difference between the reference electric potential VA and the lowest electric potential of the ejection pulse PA is smaller than an electric potential difference between the reference electric potential VB and a highest electric potential of the ejection pulse PB, and the reference electric potential VA is lower than the reference electric potential VB.

Liquid ejecting apparatus and method of controlling the same

Liquid ejecting apparatus and related methods of operation are disclosed. A liquid ejecting apparatus includes an ejecting head having liquid-ejecting nozzles, a platen disposed to support a recording medium and face the ejecting head, a movement section that moves the ejecting head relative to the platen, a heater that heats the platen, a temperature sensor to detect a temperature of the ejecting head, a driving waveform generation section that generates a driving waveform to drive the ejecting head in accordance with the detected temperature, and a liquid ejection control section that supplies the driving waveform to the ejecting head to eject liquid for printing on the recording medium in a printing area. The driving waveform is generated according to a temperature of the ejecting head that is detected when the ejecting head has come to an area outside the printing area.

Liquid ejecting apparatus and control method of liquid ejecting apparatus

Liquid ejecting apparatus and control methods thereof are disclosed. A liquid ejecting apparatus includes an ejecting head having liquid-ejecting nozzles, a platen disposed to support a recording medium and face the ejecting head, a heater that heats the platen, a temperature sensor to detect a temperature of the ejecting head, and a control section that causes liquid to be ejected from the nozzles. If a change in a temperature of the ejecting head and/or a temperature of the ejecting head exceeds a predetermined range, the control section stops ejection of liquid for printing from the nozzles in the absence of a user input to continue printing. After the control section stops the ejection of liquid, a response process can be carried out.

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Matsumoto, Japan

Shushi Makita