Abstract: A liquid ejecting apparatus includes a first ejector; a common driving signal generator configured to generate a common driving signal having a pressure generation pulse including a first element maintained at a first potential, a second element succeeding the first element and maintained at a second potential different from the first potential, and a third element succeeding the second element and maintained at a third potential different from the second potential; a selection control signal generator configured to generate a selection control signal including a first pulse and a second pulse succeeding the first pulse in a time period corresponding to the second element; and a driving waveform selector configured to supply the second potential of the second element to the pressure generating element of the first ejector at the time of the generation of a pulse selected from the first and second pulses of the selection control signal.

Abstract: A liquid ejecting apparatus includes a first ejector; a common driving signal generator configured to generate a common driving signal having a pressure generation pulse including a first element maintained at a first potential, a second element succeeding the first element and maintained at a second potential different from the first potential, and a third element succeeding the second element and maintained at a third potential different from the second potential; a selection control signal generator configured to generate a selection control signal including a first pulse and a second pulse succeeding the first pulse in a time period corresponding to the second element; and a driving waveform selector configured to supply the second potential of the second element to the pressure generating element of the first ejector at the time of the generation of a pulse selected from the first and second pulses of the selection control signal.

Abstract: An ink is ultra-permeation ink which has a surface tension in a range of 25 mN/m or greater and 35 mN/m or less, and a printer is capable of switching between a single-pass mode in which a specific landing pattern is formed on the recording paper by scan performed once and a multi-pass mode in which the specific landing pattern is formed on the landing target by scan performed a plurality of times. A controller performs control such that a total amount of ink which lands on a region in which the specific landing pattern is formed is relatively great in a case of the single-pass mode compared to a case of the multi-pass mode.

Abstract: A liquid ejecting apparatus includes a pressure generation unit that causes a liquid to be ejected from a nozzle opening that communicates with a flow channel and a liquid holding unit that supplies a liquid to the flow channel, and the pressure generation unit performs microvibration driving when the liquid holding unit is replaced.

Abstract: A drive signal generating circuit of the liquid ejection apparatus may output a second drive signal including a first unit signal including a set of two ejection drive pulses, and a fine vibration drive pulse, and a second unit signal including a set of two ejection drive pulses; and at a steady speed area of the recording head, both the first unit signal and the second unit signal are output according to one timing signal while at an acceleration or deceleration area of the recording head, one first unit signal is output according to one timing signal.

Abstract: A liquid ejecting apparatus includes a pressure generation unit that causes a liquid to be ejected from a nozzle opening that communicates with a flow channel and a liquid holding unit that supplies a liquid to the flow channel, and the pressure generation unit performs microvibration driving when the liquid holding unit is replaced.

Abstract: A liquid ejecting apparatus includes a liquid ejecting head, a driving signal generating section, a drive control section, and a sealing section. The liquid ejecting head includes a continuous liquid path and a pressure generating section. The liquid path contains a pressure space and a nozzle opening. The driving signal generating section generates a driving signal containing a driving pulse that drives the pressure generating section. The driving pulse includes a first pulse for causing discharge of droplets and a second pulse that is generated to the pressure generating section at a generation interval T set in a range represented by the following expression: (n?1/4)Tc<T<(n+1/4)Tc, where Tc is a natural oscillation period of the liquid within the pressure space. The sealing section seals the nozzle opening of the liquid ejecting head when the pressure generating section is driven by the second pulse.

Abstract: A drive signal generating circuit of the liquid ejection apparatus may output a second drive signal including a first unit signal including a set of two ejection drive pulses, and a fine vibration drive pulse, and a second unit signal including a set of two ejection drive pulses; and at a steady speed area of the recording head, both the first unit signal and the second unit signal are output according to one timing signal while at an acceleration or deceleration area of the recording head, one first unit signal is output according to one timing signal.

Abstract: An apparatus includes a mechanism that transports a medium in a transportation direction; nozzle lines each composed of nozzles aligned in the transportation direction, the nozzle lines arranged adjacent to one another in a movement direction orthogonal to the transportation direction; a mechanism that moves the nozzle lines in the movement direction; and a controller for repeating operation of discharging liquid from each nozzle line being moved bi-directionally during outward and homeward movement and operation of transporting the medium in a period between the outward and homeward discharging operation by transportation amount corresponding to nozzle-line length.

Abstract: A liquid ejecting apparatus includes a liquid ejecting head, a driving signal generating section, a drive control section, and a sealing section. The liquid ejecting head includes a continuous liquid path and a pressure generating section. The liquid path contains a pressure space and a nozzle opening. The driving signal generating section generates a driving signal containing a driving pulse that drives the pressure generating section. The driving pulse includes a first pulse for causing discharge of droplets and a second pulse that is generated to the pressure generating section at a generation interval T set in a range represented by the following expression: (n?1/4)Tc<T<(n+1/4)Tc, where Tc is a natural oscillation period of the liquid within the pressure space. The sealing section seals the nozzle opening of the liquid ejecting head when the pressure generating section is driven by the second pulse.

Abstract: A liquid ejecting apparatus includes a liquid ejecting head and a driving signal generating device. The liquid ejecting head includes a pressure generating device and a pressure chamber in communication with a nozzle opening. The pressure generating device generates pressure fluctuation in liquid in the pressure chamber. The liquid ejecting head discharges the liquid from the nozzle opening in the form of a liquid droplet. The driving signal generating device generates a driving signal that includes a discharge pulse for discharging the liquid droplet during every discharge period. The driving signal generating device sets, into the discharge pulse, an expansion element for expanding the pressure chamber, a discharge element for discharging the liquid droplet by contracting the pressure chamber, and a vibration damping element for suppressing residual vibration, which occurs in the pressure chamber after the liquid droplet is discharged, by further contracting the pressure chamber.

Abstract: A liquid ejecting apparatus includes a liquid ejecting head and a driving signal generating device. The liquid ejecting head includes a pressure chamber and a pressure generating device. The pressure chamber is in communication with a nozzle opening. The pressure generating device is capable of generating pressure fluctuation in liquid present in the pressure chamber. The liquid ejecting head discharges the liquid present in the pressure chamber from the nozzle opening in the form of a liquid droplet by operation of the pressure generating device. The driving signal generating device generates a driving signal that includes a discharge pulse for discharging the liquid droplet by driving the pressure generating device during every discharge period.

Abstract: After assembling an ink jet recording head which includes a plurality of nozzle orifices forming at least one nozzle row, pressure chambers each communicated with the associated nozzle orifice, pressure generating elements each generating pressure fluctuation in ink provided in the associated pressure chamber to eject an ink droplet from the associated nozzle orifice, a natural period of the ink pressure fluctuation in the pressure chamber of the assembled recording head is measured. Then the assembled recording head is classified into a plurality of ranks, based on the measured natural period.

Abstract: A droplet discharge device is provided which can maintain predetermined liquid discharge characteristics even in the case where a drawing liquid of a high viscosity is used. A droplet discharge device which discharges liquid filled into a droplet discharge head, has a filling apparatus which switches between a first liquid and a second liquid of a lower viscosity than the first liquid, and fills the droplet discharge head.

Abstract: In an apparatus for measuring an ejection velocity of a liquid droplet ejected from a nozzle orifice of a head device which is provided with a pressure chamber communicated with the nozzle orifice and an actuator which varies pressure of liquid contained in the pressure chamber, a driver generates a drive signal to drive the actuator to eject a liquid droplet from the nozzle orifice. A photo emitter emits a light beam so as to intersect a space through which the liquid droplet passes. A photo receiver receives the light beam which has been passed through the space. A calculator calculates an ejection velocity of the liquid droplet based on a timing at which the actuator is driven and a change in a photo-receiving state of the photo receiver.

Abstract: In an apparatus for measuring a natural period of liquid in a pressure chamber formed in a head device which is provided with a nozzle orifice communicated with the pressure chamber and an actuator which varies pressure of the liquid contained in the pressure chamber, a driver generates a plurality of drive signals, each of which drives the actuator to eject a liquid droplet from the nozzle orifice under a condition different from the conditions established by the other drive signals. A light emitter emits a light beam so as to intersect a space through which the liquid droplet passes. A light receiver receives the light beam which has been passed through the space. A first calculator calculates an ejection velocity of the liquid droplet based on a timing at which the actuator is driven and a change in a photo-receiving state of the light receiver, with regard to every drive signal.

Abstract: A first evaluation signal includes a first excitation element adapted to excite pressure fluctuation in liquid contained in the pressure chamber and a first ejection element which follows the excitation element after a first time period to eject a first liquid droplet from the nozzle. A second evaluation signal includes a second excitation element adapted to excite pressure fluctuation in liquid contained in the pressure chamber and a second ejection element which follows the excitation element after a second time period to eject a second liquid droplet from the nozzle which is longer than the first time period. The first evaluation signal is supplied to the pressure generating element to measure a first ejected amount of the first liquid droplet. The second evaluation signal is supplied to the pressure generating element to measure a second ejected amount of the second liquid droplet. An ejected amount ratio of the first ejected amount and the second ejected amount is calculated.

Abstract: A pressure generating element is associated with a pressure chamber communicated with a nozzle orifice. The pressure generating element is operable to generate pressure fluctuation in liquid contained in the pressure chamber to eject a liquid droplet from the nozzle orifice, when a drive signal is supplied thereto. An identifier is provided with ID information including a first deviation of an ejected liquid amount from a designed value when a drive signal at a first, regular drive frequency is supplied, and a second deviation of an ejected liquid amount from the designed value when a drive signal at a second, operable maximum drive frequency is supplied.

Abstract: A droplet discharge device is provided which can maintain predetermined liquid discharge characteristics even in the case where a drawing liquid of a high viscosity is used. A droplet discharge device which discharges liquid filled into a droplet discharge head, has a filling apparatus which switches between a first liquid and a second liquid of a lower viscosity than the first liquid, and fills the droplet discharge head.

Abstract: A pressure generating element is associated with a pressure chamber communicated with a nozzle orifice. The pressure generating element is operable to generate pressure fluctuation in liquid contained in the pressure chamber to eject a liquid droplet from the nozzle orifice, when a drive signal is supplied thereto. An identifier is provided with ID information including a first deviation of an ejected liquid amount from a designed value when a drive signal at a first, regular drive frequency is supplied, and a second deviation of an ejected liquid amount from the designed value when a drive signal at a second, operable maximum drive frequency is supplied.