Seiko Epson Corporation

Toru Kashimura

Yoichiro Kondo

Hiroshi Sugita

Eiju Hirai

Tetsuo Takagi

Dai Nozawa

Yuki Watanabe

Motoki Takabe

Hiroaki Okui

Koji Kitazawa

Osamu Tonomura

Asami Okamoto

A liquid discharge device in which an inter-wiring region between a first wiring through which a first drive signal, and a second wiring through which a second drive signal propagates includes a wide inter-wiring region in which an inter-wiring distance between the first wiring and the second wiring is larger than a sum of a wire width of a fourth wiring and a minimum diameter of a via wiring, and a narrow inter-wiring region in which the inter-wiring distance is smaller than the sum of the wire width of the fourth wiring and the minimum diameter of the via wiring, and larger than a wire width of the via wiring, and a third wiring is not located in the narrow inter-wiring region between a virtual line coupling a first terminal and a second terminal, and the wide inter-wiring region, in the inter-wiring region of a first wiring layer.

Liquid discharge device and wiring substrate

A liquid discharge device including a drive circuit substrate that drives a piezoelectric element of a liquid discharge head, and that includes a substrate which includes a first wiring layer having a first wiring through which the first drive signal propagates, a second wiring layer having a second wiring through which the second drive signal propagates, and a third wiring layer located between the first wiring layer and the second wiring layer and having a fourth wiring through which the reference voltage signal propagates, in which a third wiring through which the third drive signal propagates is provided on any one of the first wiring layer, the second wiring layer, and the third wiring layer.

Liquid discharge device and drive circuit substrate

A liquid discharge device in which a drive circuit substrate that outputs a first drive signal supplied to a first electrode, a substrate, a first drive circuit that has a first circuit element in which a ground potential is supplied to one end and outputs the first drive signal, a first capacitor in which one end is electrically coupled to the second electrode and a ground potential is supplied to the other end, and a second capacitor in which one end is electrically coupled to the second electrode and a ground potential is supplied to the other end, the substrate includes a first surface and a second surface, the first capacitor is a chip capacitor, the second capacitor is an electrolytic capacitor, the first circuit element and the first capacitor are provided on the first surface, and the second capacitor is provided on the second surface.

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 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 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 length of a path between the input section and the third energy generation element in the wiring section is shorter than a length of a path between the input section and the first energy generation element in the wiring section and shorter than a length of a path between the input section and the second energy generation element in the wiring section.

Liquid ejecting head and liquid ejecting apparatus

A liquid discharging apparatus that includes a discharging head for discharging liquid, a driving circuit for generating a driving signal, and a circuit board, in which the driving circuit includes a coil and a capacitor, the circuit board includes a first layer, a second layer, first wiring provided at the first layer, second wiring provided at the second layer, and interlayer wiring, the first wiring couples a first start point and a first end point, and is provided in a circumferential shape, the second wiring couples a second start point and a second end point, and is provided in a circumferential shape, the interlayer wiring electrically couples the first end point and the second start point, the first wiring and the second wiring partially overlap each other, and the first wiring, the second wiring, and the interlayer wiring constitute at least a part of the coil.

Liquid discharging apparatus and circuit board

A liquid ejecting apparatus includes a liquid discharging head having a nozzle and a piezoelectric element, a driving signal generating circuit, a reference voltage signal generating circuit, a substrate on which the driving signal generating circuit and the reference voltage signal generating circuit are provided, a first wire, a second wire, and a coil, in which the driving signal generating circuit generates a driving signal, the reference voltage signal generating circuit generates a reference voltage signal, the piezoelectric element is driven based on the driving signal supplied to one end of the piezoelectric element and the reference voltage signal supplied to the other end of the piezoelectric element, the first wire propagates the driving signal to the one end, and the second wire propagates the reference voltage signal to the other end through the coil.

Liquid ejecting apparatus and driving circuit

There is provided a liquid discharge head including a drive IC that outputs the first signal and the second signal, and a wiring substrate having a first side and a second side longer than the first side, electrically connected to the drive IC, and propagating the first signal and the second signal, in which the wiring substrate includes a first electrode to which the first signal is input, a second electrode to which the second signal is input, a third electrode electrically connected to the first electrode, and a fourth electrode electrically connected to the second electrode, and in a direction along the second side, the second electrode is positioned between the first electrode and the third electrode, and the third electrode is positioned between the second electrode and the fourth electrode.

Liquid discharge head, liquid discharge apparatus, and wiring substrate

A liquid discharge apparatus includes: a signal line supplied with a print data signal including first data and second data; a discharge head including a plurality of nozzles including a first nozzle and a second nozzle that discharge liquid in accordance with the print data signal; a first register that is connected to the signal line, captures the first data corresponding to the first nozzle, and holds the first data; a second register that is connected to the signal line, captures the second data corresponding to the second nozzle, and holds the second data; and a register selection circuit that exclusively selects either capturing the first data by the first register or capturing the second data by the second register based on register selection data.

Liquid discharge apparatus for performing printing

A liquid ejecting apparatus includes a first ejecting section that includes a first drive element and ejects liquid by driving the first drive element, a first drive circuit that includes a first transistor and outputs a first drive signal to the first drive element, a second drive circuit that includes a second transistor and outputs a second drive signal to the first drive element, a circuit substrate on which the first drive circuit and the second drive circuit are mounted. The first drive circuit is mounted on a first surface of the circuit substrate, and the second drive circuit is mounted on a second surface of the circuit substrate, and the first transistor and the second transistor are disposed at position that do not overlap one another in plan view of the circuit substrate.

Liquid ejecting apparatus and circuit board

There is provided a head unit including: a first board; a driving module, and a second board; and a flexible wiring board which connects the first board and the second board to each other, in which the flexible wiring board includes a first wiring layer, a second wiring layer which opposes the first wiring layer, a first output terminal which is connected to a first end of the driving element, a second output terminal which is connected to a second end of the driving element, a first wiring which is connected to the first output terminal, a second wiring which is connected to the second output terminal, and a through-hole which connects the first wiring layer and the second wiring layer, in which the second wiring is provided on the second wiring layer, and in which the second wiring and the second output terminal are connected to each other.

Growing community of inventors

Shiojiri, Japan

Toru Kashimura