Seiko Epson Corporation

Sony Ericsson Mobile Communications Japan, Inc.

Bridgestone Corporation

Sony Mobile Communications Japan, Inc.

Sony Ericsson Mobile

Sony Mobile Communications Inc.

Yoichiro Kondo

Kota Onishi

Takahiro Kamijo

Hiroshi Kato

Katsuya Suzuki

Kuniharu Suzuki

Kentaro Yoda

Manabu Yamazaki

Mikimoto Jin

Haruhiko Sogabe

Toru Kashimura

Hirofumi Okada

Masayuki Kamiyama

Nobutaka Shiozaki

Eiju Hirai

Motoki Takabe

Tetsuo Takagi

Daisuke Yamada

Hiroaki Okui

Shunya Fukuda

Dai Nozawa

Fumiya Takino

Minoru Hasegawa

Naohiro Sasaka

Asami Okamoto

Hiroyuki Isoi

Hiroshi c/o Sony Ericsson Mobile Comm Japan Inc Kato

Katsuya c/o Sony Ericsson Mobile Comm Japan Inc Suzuki

Kuniharu c/o Sony Ericsson Mobile Comm Japan Inc Suzuki

Manabu c/o Sony Ericsson Mobile Comm Japan Inc Yamazaki

Yoda Kentaro

A drive circuit unit is provided in a head unit together with a head and is configured to generate a drive signal for driving the head. The drive circuit unit includes a base board that includes a drive-circuit-unit-side connector coupled to a head-side connector; and a plurality of drive circuit boards on each of which a drive circuit configured to generate a drive signal is mounted, wherein the base board is disposed such that the base board extends in a direction intersecting with a nozzle surface of the head, and the plurality of drive circuit boards is disposed on the base board.

Drive circuit unit, head unit, and liquid ejecting apparatus

Provided is a drive circuit unit that drives a head including a discharge section discharging, based on a drive signal, a liquid from a nozzle in a first direction, the drive circuit unit including: a fan; and a power supply board disposed on a side in a second direction opposite to the first direction with respect to the head, supplying power to a drive circuit, and having a first surface on which the fan is mounted, in which a height of a first object, which is a highest of objects mounted on the first surface in a direction orthogonal to the first surface, is equal to or less than a length of the head in a transport direction, and the first surface is a surface parallel to the first direction or a surface oblique to the first direction.

Drive circuit unit, head unit, and liquid discharge apparatus

A liquid discharge device including a substrate that includes a first through-hole, a first drive circuit, a second drive circuit, a third drive circuit, a metal frame, and a first screw that is inserted through the first through-hole and attaches the metal frame to the substrate, in which the first drive circuit outputs a first drive signal, the second drive circuit outputs a second drive signal, the third drive circuit outputs a third drive signal, the first drive circuit, the second drive circuit, and the third drive circuit are located side by side in an order of the first drive circuit, the second drive circuit, and the third drive circuit on the substrate along one direction, and the first through-hole is located between the first drive circuit and the second drive circuit in the one direction.

Liquid discharge device and head drive circuit

A liquid discharge device including a first drive circuit, a second drive circuit, a third drive circuit, a fourth drive circuit, a connector coupled to a discharge head, and a substrate that includes a first wiring which couples the connector and the first drive circuit outputting a first drive signal, a second wiring which couples the connector and the second drive circuit outputting a second drive signal, a third wiring which couples the connector and the third drive circuit outputting a third drive signal, and a fourth wiring which couples the connector and the fourth drive circuit outputting a fourth drive signal, in which the first wiring is shorter than the second wiring, the third wiring, and the fourth wiring, and the fourth wiring is longer than the first wiring, the second wiring, and the third wiring.

A liquid discharge device includes a first discharge portion, a second discharge portion, a first drive circuit outputs a first drive signal that the first discharge portion discharges a liquid having a first discharge amount, a second drive circuit outputs a second drive signal that the first discharge portion does not discharge a liquid, a third drive circuit outputs a third drive signal that the second discharge portion discharges a liquid having a second discharge amount, and a fourth drive circuit outputs a fourth drive signal that the second discharge portion does not discharge the liquid, in which the third drive circuit is located between the first drive circuit and the second drive circuit along the one direction, and a shortest distance between the fourth drive circuit and the second drive circuit is shorter than a shortest distance between the fourth drive circuit and the third drive circuit.

A liquid discharge device including a discharge head, a head drive circuit that outputs a first drive signal, and a second drive signal, and a coupling member includes a first wiring that propagates the first drive signal, a second wiring that propagates the second drive signal, a third wiring that propagates a reference voltage signal, and a base material provided with the first wiring, the second wiring, and the third wiring, in which the first wiring and the second wiring are provided on a first surface of the base material, the third wiring is provided on a second surface different from the first surface of the base material, and at least one of the first wiring and the second wiring is located so as to overlap with at least a part of the third wiring in a first direction along a direction from the first surface to the second surface.

Liquid discharge device

An electronic device including a substrate, a first electronic component provided on the substrate, a second electronic component provided on the substrate and having a thickness in a normal direction of the substrate smaller than that of the first electronic component, a first heat conductive member in contact with the first electronic component, a second heat conductive member in contact with the second electronic component, and a heat sink attached to the substrate, in which the heat sink includes a base portion provided so as to cover the first electronic component and the second electronic component and attached to the substrate, a first protruding portion that protrudes from the base portion toward the first electronic component and is in contact with the first heat conductive member, and a second protruding portion that protrudes from the base portion toward the second electronic component and is in contact with the second heat conductive member, and a length of the first protruding portion in the normal direction is shorter than a length of the second protruding portion in the normal direction.

Electronic device

A liquid ejecting apparatus includes a liquid ejecting head, a first drive signal, a second drive signal output circuit, a third drive signal output circuit that outputs a third drive signal, having a smaller voltage amplitude than voltage amplitudes of other drive signals, to drive the liquid ejecting head, and a first conductive component including a first conductive section that electrically couples the liquid ejecting head to the first drive signal output circuit, a second conductive section that electrically couples the liquid ejecting head to the second drive signal output circuit, and a third conductive section that electrically couples the liquid ejecting head to the third drive signal output circuit. The first conductive section is positioned between the second conductive section and the third conductive section.

Liquid ejecting apparatus, head driving circuit, and liquid ejecting head

A liquid ejecting apparatus includes a drive element, and a drive circuit that outputs a drive signal that drives the drive element, wherein the drive circuit includes a modulation circuit that modulates a base drive signal to output a modulation signal, an amplifier circuit that amplifies the modulation signal to output an amplified modulation signal, a demodulation circuit that demodulates the amplified modulation signal to output the drive signal, and a substrate on which the modulation circuit, the amplifier circuit, and the demodulation circuit are provided, wherein the substrate includes a base material includes a metal and a first layer laminated on the base material, wherein the first layer includes a first propagation wire through which at least one of the amplified modulation signal and the drive signal propagates, and wherein the base material has a thickness greater than a thickness of the first layer.

Liquid ejecting apparatus and circuit substrate

A drive circuit for driving a first drive element having a first terminal and a second terminal and driving a second drive element having a third terminal and a fourth terminal, includes a first drive signal output circuit that is electrically coupled to the first terminal and outputs a first drive signal, a second drive signal output circuit that is electrically coupled to the third terminal and outputs a second drive signal, a reference voltage signal output circuit that outputs a reference voltage signal having a constant reference voltage value, and a first switch circuit having one end electrically coupled to an output terminal of the reference voltage signal output circuit and the other end electrically coupled to the second terminal and the fourth terminal. The first switch circuit switches whether or not to supply a second constant voltage signal to the second terminal and the fourth terminal.

Drive circuit and liquid ejecting apparatus

A drive circuit includes a drive signal output circuit that outputs a drive signal supplied to the piezoelectric element and a first constant voltage signal that is constant at a first voltage value; a switch circuit having one end electrically coupled to an output terminal of the drive signal output circuit and the other end electrically coupled to the first terminal of the piezoelectric element, and a reference voltage signal output circuit that is electrically coupled to the second terminal of the piezoelectric element and outputs a second constant voltage signal which is constant at a second voltage value, in which before the reference voltage signal output circuit starts to output the second constant voltage signal, the one end and the other end of the switch circuit are controlled to be non-conductive, and the drive signal output circuit outputs the first constant voltage signal.

A drive circuit includes a first voltage output circuit coupled to a first terminal and outputting a first voltage signal, a second voltage output circuit coupled to a second terminal and outputting a second voltage signal, and a drive signal output circuit coupled to the first terminal and outputting a drive signal. In a first mode, the second voltage output circuit outputs the second voltage signal and the drive signal output circuit outputs the drive signal whose voltage value varies. In a second mode, the second voltage output circuit outputs the second voltage signal and the drive signal output circuit outputs the drive signal which is constant at a third voltage value. In a third mode, the first voltage output circuit outputs the first voltage signal and the second voltage output circuit outputs the second voltage signal.

A drive circuit that drives a piezoelectric device including a drive signal selection control circuit which controls supply of the drive signal to the piezoelectric element, the drive circuit including a drive signal output circuit that outputs the drive signal, a power supply voltage signal output circuit that outputs a power supply voltage signal, and a power supply voltage control circuit that controls supply of the power supply voltage signal to the drive signal selection control circuit, in which the drive signal output circuit includes a modulation circuit, an amplification circuit, a demodulation circuit, a feedback circuit, and a discharge circuit, a first wiring electrically couples the drive signal selection control circuit and the power supply voltage control circuit to each other, and the discharge circuit is electrically coupled to a second wiring through which the drive signal output from the demodulation circuit propagates, through the feedback circuit.

A drive circuit for driving a first drive element having a first terminal and a second terminal and driving a second drive element having a third terminal and a fourth terminal, includes a first drive signal output circuit that is electrically coupled to the first terminal and outputs a first drive signal, and a second drive signal output circuit that is electrically coupled to the third terminal and outputs a second drive signal. The first drive signal output circuit includes a first reference voltage signal output circuit that outputs a first reference voltage signal. The first reference voltage signal output circuit is electrically coupled to the second terminal and the fourth terminal. The second drive signal output circuit is not electrically coupled to the second terminal and the fourth terminal. The first drive signal output circuit starts startup after the second drive signal output circuit.

A head unit includes piezoelectric elements configured to be driven in accordance with a drive signal to discharge liquid from nozzles, a protection plate protecting the piezoelectric elements, a head chip including a selection circuit disposed on the protection plate, the selection circuit being configured to select to supply or not to supply the drive signal to the piezoelectric elements, a heat sink, and a thermal conductor coupling the head chip and the heat sink.

Growing community of inventors

Chino, Japan

Yoichiro Kondo