Ricoh Company, Ltd.

Ricoh Printing Systems, Ltd.

Hitachi Printing Solutions, Ltd.

Hitachi Koki Co., Ltd.

Asahi Kasei Pharma Corporation

Hitoshi Kida

Takahiro Yamada

Shinya Kobayashi

Kunio Satou

Kazuo Shimizu

Katsunori Kawasumi

Satoru Tobita

Tomohiko Koda

Takeshi Takemoto

Toshitaka Ogawa

Hidetoshi Fujii

Lee Chahn

Yoshikane Matsumoto

Kenichi Kugai

Akemi Ouchi

Koki Matsubara

Shunsuke Kaneko

Hiroya Tokita

Susumu Saito

Mamoru Okano

Kenji Yamada

Tsutomu Maekawa

Osamu Machida

Takuji Torii

Makoto Kurosawa

Kunihiro Tamahashi

Nobuhiro Noto

Shun Goto

Hiroomi Kozawa

Katsuya Kawai

Hiromichi Kuriyama

Nobuhiro Kurosawa

Tatsuya Dan

Kazunobu Hayashi

Takashi Sekino

Eiichi Toyama

Yoshihiro Arai

Yoshihito Kanzawa

Naoto Ueda

A liquid discharge apparatus includes a liquid discharger and circuitry. The liquid discharger includes a nozzle to discharge liquid. The circuitry is configured to generate and output a common drive waveform including a plurality of drive pulses for discharging the liquid; select one or more of the plurality of drive pulses from the common drive waveform and apply the one or more of the plurality of drive pulses to a pressure generating element of the liquid discharger; and adjust, with different adjustment values, application waveform shapes of at least two of the plurality of drive pulses applied to the pressure generating element.

Liquid discharge apparatus, head drive control method, and head drive control device

A head drive controller to drive a head to discharge a liquid, the head drive controller includes a drive waveform generator configured to generate a drive voltage waveform to drive the head, a switch coupled to the head and the drive waveform generator, the switch configured to select passing or non-passing of the drive voltage waveform generated by the drive waveform generator to the head. The drive voltage waveform includes a first expansion waveform element to expand a pressure chamber in the head, and a second expansion waveform element to expand the pressure chamber, the second expansion waveform element having a slew rate smaller than a slew rate of the first expansion waveform element.

Head drive controller and liquid discharge apparatus

An electronic device includes a switching element, a first common-electrode wiring, at least a part of the first common-electrode wiring being covered with the switching element, a plurality of second common-electrode wirings branched from the part of the first common-electrode wiring covered with the switching element, a plurality of individual power-output terminals arranged in a row in the switching element, and a plurality of individual-electrode wirings arranged in a row, the plurality of individual-electrode wirings being connected to the plurality of individual power-output terminals, respectively. Each of the plurality of second common-electrode wirings is disposed between the plurality of individual-electrode wirings.

Electronic device, liquid discharge head, liquid discharge device, liquid discharge apparatus, and electronic apparatus

A liquid discharge apparatus includes a head and a switching device. The head includes a piezoelectric element and a pressure chamber configured to discharge liquid. The switching device is configured to select application or non-application of a drive voltage waveform to the piezoelectric element. The drive voltage waveform includes a discharge waveform to pressurize and discharge the liquid in the pressure chamber and a damping waveform to suppress residual vibration in the pressure chamber. The damping waveform is disposed after the discharge waveform in time series. The switching device includes a switch and a diode. The switch is configured to be turned on in a falling waveform element of each of the discharge waveform and the damping waveform. The diode is connected in parallel with the switch in a direction opposite to the falling waveform element of each of the discharge waveform and the damping waveform.

Liquid discharge apparatus and head drive control device

A liquid discharge head includes a body to discharge liquid, a first wiring substrate extending from the body, and a second wiring substrate electrically connected to the first wiring substrate. The body includes a nozzle face in which a plurality of nozzles, from which the liquid is discharged, is formed. The second wiring substrate is disposed along a direction perpendicular to the nozzle face of the body, a principal surface of the first wiring substrate is disposed along a short side of the body, and a principal surface of the second wiring substrate is disposed along a longitudinal direction of the body.

Liquid discharge head, liquid discharge device, and liquid discharge apparatus

A flexible member includes a first member, a second member overlapping the first member, and a plurality of second reinforcing portions. The first member includes a non-overlapping region not overlapping the second member. The non-overlapping region includes an edge portion of the first member. The second member includes a plurality of first reinforcing portions between which the non-overlapping region is interposed. Each of the plurality of second reinforcing portions overlaps both a first area of the second member in which one of the plurality of first reinforcing portions is formed and a second area of the second member other than the first area when the flexible member is projected from a direction perpendicular to a surface of the flexible member.

Flexible member, wiring member, liquid discharge head, liquid discharge device, liquid discharge apparatus, electronic device

A wiring substrate includes a plurality of wiring patterns, a protective layer to cover the plurality of wiring patterns and regions between the plurality of wiring patterns, and a plurality of terminals communicating with the plurality of wiring patterns, respectively, the plurality of terminals not covered by the protective layer. Pitch between the plurality of terminals adjacent to each other includes a first pitch and a second pitch wider than the first pitch. At least one of the plurality of wiring patterns, the terminals of which are adjacent to each other at the second pitch, includes a portion of expanded width having a width wider than a width of the plurality of terminals. The portion of expanded width is covered with the protective layer.

Wiring substrate, wiring member, liquid discharge head, liquid discharge device, and liquid discharge apparatus

A liquid discharge head includes a plurality of nozzles to discharge a liquid; a plurality of pressure generators corresponding to the plurality of nozzles; a driver IC to output a drive waveform to each of the plurality of pressure generators; a substrate on which the driver IC is mounted; and a drive voltage supply wire to supply drive voltage to the plurality of pressure generators, disposed on the substrate. In plan view, the driver IC has a rectangular shape and at least part of the drive voltage supply wire crosses over a longer side of the driver IC.

A liquid discharge head includes a plurality of nozzles to discharge liquid droplets; a plurality of piezoelectric elements, each corresponding to a corresponding one of the plurality of nozzles and disposed along a nozzle alignment direction along which the plurality of nozzles is aligned; an actuator member on which the plurality of piezoelectric elements is aligned; and wiring disposed along the nozzle alignment direction, connected to the plurality of piezoelectric elements, and included in the actuator member, the wiring including a first wiring pattern to which the plurality of piezoelectric elements is connected, the first wiring pattern including a near side proximal to and a far side distal from a source of a drive signal for the piezoelectric elements. The near side and the far side are connected via a second wiring pattern.

A control circuit is disposed in which an analog switch is built, an ON/OFF-timing of the analog switch can be controlled, and mask-patterns can be set, which mask-patterns are used for switching ON/OFF the analog switch can be selected by analog-switch-selection data, and a number of the mask-patterns which can be set can be selected. The circuit includes mask-pattern-setting units for setting one of the mask-patterns by one of switching control signals; and a selection unit for selecting a mode from modes including a first mode in which the number of mask-patterns is smaller and a second mode in which the number of mask-patterns is larger. When the first mode is selected by the selection unit, to one mask-pattern-setting unit which is not selected by the analog-switch-selection data, the same switching control signal that is supplied to another mask-pattern-setting unit which is selected by the analog-switch-selection data is supplied.

Control circuit and control method thereof, liquid droplet ejection head and image forming apparatus

A droplet discharging head includes: a nozzle substrate that includes a nozzle opening to discharge a droplet therethrough; a liquid chamber substrate that includes liquid pressure chambers communicating with the nozzle openings; a vibration plate arranged to face the nozzle substrate with the liquid chamber substrate interposed therebetween; piezoelectric elements that are provided to face the liquid pressure chambers with the vibration plate interposed therebetween and are arranged in a predetermined direction; a driving element provided, in a flip-chip implementation, on a flow path substrate that includes the nozzle substrate, the liquid chamber substrate, the vibration plate, and the piezoelectric elements; and a first reinforcing wire that is disposed to at least one of the flow path substrate and the driving element, has a band shape extending in a direction along a row of the piezoelectric elements, and is connected to a common electrode shared by the piezoelectric elements.

Droplet discharging head and image forming apparatus

A method for manufacturing a liquid discharging head, the method including forming a plurality of nozzles that discharge liquid droplets, forming a plurality of piezoelectric elements that generate pressure for discharging liquid droplets from the respective nozzles; and performing a repolarization process on the piezoelectric elements to set non-uniformity of the droplet discharging characteristics of the nozzles to be in a predetermined range by combining adjustment of a polarization sensitivity and adjustment of a polarization voltage for each of the piezoelectric elements.

Method of manufacturing liquid discharging head

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Hitachinaka, Japan

Hitoshi Kida