Canon Kabushiki Kaisha

Mitsubishi Electric Corporation

Yoshiyuki Nakagawa

Kazuhiro Yamada

Shuzo Iwanaga

Shintaro Kasai

Takuro Yamazaki

Akiko Hammura

Koichi Ishida

Takatsugu Moriya

Akiko Saito

Toru Nakakubo

Shingo Okushima

Ryo Kasai

Tatsuya Yamada

Tomohiro Sato

Noriyasu Nagai

Naozumi Nabeshima

Shinji Kishikawa

Tomoki Ishiwata

Masataka Sakurai

Takatsuna Aoki

Masafumi Morisue

Seiichiro Karita

Ken Tsuchii

Yohei Nakamura

Takashi Sugawara

Tomoko Kudo

Ayako Iwasaki

Eisuke Nishitani

Akira Yamamoto

Yasuhiko Osaki

Ayako Tozuka

Yumi Komamiya

Tatsurou Mori

Yoshihiro Hamada

Atsushi Teranishi

Ayako Maruyama

Masahiro Kobayashi

Takashi Kato

Yusuke Onuki

Mikio Sanada

Yasushi Matsuno

Zentaro Tamenaga

Tomoyuki Inoue

Sho Suzuki

Akira Shibasaki

Yu Nishimura

Masahiko Kubota

Koji Yamaguchi

Hideki Ina

Takashi Ikeda

Keiji Tomizawa

Yutaka Kano

Atsunori Terasaki

Masashi Hayashi

Ryoji Kanri

Akihiko Okano

Takayuki Sekine

Takashi Okagawa

Masao Furukawa

Yusuke Imahashi

Ryo Yoshida

Tetsuya Tazawa

Kentaro Muro

Tetsuo Yamashita

Yukinobu Suzuki

Akihiro Kawano

Atsushi Hiramoto

Shingo Nakano

Yoshihisa Kawamura

Shin-ichi Hakamada

Koji Hara

Seiichi Kamiya

Naoko Shimizu

Masao Ishioka

Naoto Fukuda

Kazuhiro Ooishi

Takahide Takeishi

Shin-Ichi Hakamada

In a liquid ejection head capable of suppressing a decrease in printing quality, circulation efficiency J at an ejection orifice on a downstream side in a flow direction in a channel is set high.

Liquid ejection head

A liquid ejection head that is compact and whose reliability of an electrical connection portion is high includes a plurality of sets of element substrates in which a plurality of ejection elements ejecting a liquid of the same type is arrayed and a plurality of sets of electrical wiring members for supplying electric power to the element substrates. Each element substrate is arrayed in a second direction inclined with respect to a first direction in which the plurality of ejection elements is arrayed. Each electrical wiring member is connected to a terminal arranged at one end portion of the corresponding element substrate and extends in a third direction intersecting the first direction and the second direction.

Liquid ejection head, liquid ejection apparatus, and ejection module

To provide a liquid ejection module capable of arranging ejection openings for a high resolution and suppressing an increase in wiring resistance without decreasing liquid circulation efficiency, a liquid delivery mechanism is arranged below an energy generating element, a plurality of penetrating flow paths are provided to correspond to a plurality of pressure chambers, respectively, and electric wiring is routed between adjacent penetrating flow paths.

Liquid ejection module

A liquid ejection head includes a plurality of nozzles arranged along a first direction of an ejection surface, a plurality of pressure chambers communicating with the plurality of individual nozzles and provided with actuators configured to apply, to a liquid, pressures for ejecting the liquid from the nozzles, a plurality of discrete flow paths communicating with the plurality of individual pressure chambers, a common flow path communicating with the plurality of individual discrete flow paths via discrete opening portions and extending in the first direction, and a damper mechanism disposed to face the common flow path in a direction crossing the ejection surface to absorb a pressure fluctuation in the liquid in the common flow path. The common flow path is provided with a partition wall disposed between the discrete opening portions adjacent in the first direction to extend in the direction crossing the ejection surface.

A liquid ejection head includes: an ejection port array being an array of ejection ports; a plurality of pressure chambers corresponding respectively to the ejection ports and communicating with the ejection ports; individual supply channels and individual collection channels communicating with the pressure chambers; a common supply channel communicating with surfaces of the individual supply channels opposite to surfaces thereof communicating with the pressure chambers; a common collection channel communicating with surfaces of the individual collection channels opposite to surfaces thereof communicating with the pressure chambers; and a damper member forming a wall of a part of at least one of the common supply channel or the common collection channel. The common supply channel and the common collection channel are formed so as to extend in a first direction along the ejection port array, and are disposed side by side in a second direction crossing the ejection port array.

A liquid ejection head and liquid ejection apparatus are capable of reducing or preventing a decrease in image quality without increasing the chip size. To achieve this, a configuration is employed in which a bonding layer is not provided between a liquid supply substrate and channel partitions between common supply channels and common collection channels, and a minute communication portion is provided there.

Liquid ejection head and liquid ejection apparatus

A liquid ejection head including an ejection port forming part, a flow path forming part including a liquid chamber, and an individual supply flow path configured to supply liquid to the liquid chamber, and a substrate including a supply flow path configured to supply liquid to the individual supply flow path and an outflow flow path configured to cause liquid to flow out of the liquid chamber, wherein a height of the individual supply flow path is larger than a height from a surface of the liquid chamber facing the ejection port to the ejection port forming member, and when viewed from the direction perpendicular to the surface of the substrate, a sidewall surface of the liquid chamber on a side with the supply flow path (1) coincides with an end surface of the ejection port, or (2) is disposed within the ejection port.

A liquid ejection head includes a print element substrate including multiple ejection openings, pressure chambers, a common flow path, and pumps, the pumps being configured to circulate liquid between the common flow path and the pressure chamber; and a flow path member laminated to the print element substrate. The flow path member includes a supply flow path and a collection flow path, the supply flow path being configured to supply liquid to the print element substrate, and the collection flow path being configured to collect liquid that is not ejected. The supply flow path and the collection flow path have liquid connection with the same common flow path. A circulating pump generates a flow of liquid flowing in an order of the supply flow path, the common flow path, and the collection flow path, the circulating pump being provided at a position different from the print element substrate.

A liquid ejection head includes an ejection opening; a passage in which an energy generation element is disposed; an ejection opening portion that allows communication between the ejection opening and the passage; a supply passage for allowing the liquid to flow into the passage; and an outflow passage for allowing the liquid to flow out to the outside. An expression of H×P×W>1.7 is satisfied when a height of the passage is set to H [μm], a length of the ejection opening portion is set to P [μm], and a length of the ejection opening portion is set to W [μm].

Liquid ejection head, liquid ejection apparatus, and method of supplying liquid

A method is provided for determining, in a liquid ejection apparatus, a state of a liquid ejection from an ejection port. The liquid ejection apparatus includes the ejection port configured to eject a liquid, a substrate comprising an electrothermal conversion element configured to generate heat for ejecting the liquid from the ejection port, and a temperature detection unit configured to detect temperature information on the substrate. The method includes performing a first comparison process to compare the temperature information on the substrate detected at a first timing by the temperature detection unit with a first threshold value, and performing a second comparison process to compare the temperature information on the substrate detected at a second timing by the temperature detection unit with a second threshold value.

Liquid ejection apparatus and determination method for determining ejection state

Provided is a liquid ejection module capable of enhancing the strength of an orifice plate while achieving favorable ejection operation at each ejection port. To that end, the liquid ejection module includes a functional layer in which a plurality of energy generating elements are arranged, a flow channel forming layer in which pressure chambers, individual flow channels, and a common flow channel are formed, and an orifice plate having ejection ports formed therein. The functional layer, the flow channel forming layer and the orifice plate are stacked. In the flow channel forming layer, a beam is formed, extending from a flow channel wall of the common flow channel toward the individual flow channels and supporting the orifice plate in a region facing a first opening.

Liquid ejection module and liquid ejection head

A liquid ejecting head has a laminated flow path member on which a supply flow path for individually supplying a plurality of liquids to an element substrate and a collection flow path for individually collecting the liquids are formed. The supply flow path includes first and second common supply flow paths for horizontally leading first and second liquids to positions corresponding to a plurality of element substrates. The first and second common supply flow paths are formed in the same layer of the laminated flow path member. The collection flow path includes a first common collection flow path for horizontally collecting the first liquid and a second common collection flow path for horizontally collecting the second liquid from positions corresponding to the plurality of element substrates. The first and second common collection flow paths are formed in the same layer of the laminated flow path member.

Liquid ejecting head and liquid ejecting apparatus

A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.

Liquid discharge head and liquid discharge method

A liquid discharge head includes a liquid discharge substrate that has a discharge-orifice row, pressure generating elements, and pressure chambers. The liquid discharge head discharges a liquid in a block-by-block manner using sequential driving. The discharge-orifice row is disposed so as to incline at an angle θ=Arctan (d1/d2) relative to a direction extending orthogonal to the conveyance direction of the medium, in which d1 (μm) is a disposition spacing of the discharge orifices in the discharge-orifice row in the conveyance direction and d2 (μm) is a disposition spacing of the discharge orifices in the discharge-orifice row in the direction orthogonal to the conveyance direction. A partition wall is formed between adjacent pressure chambers so as to separate the adjacent pressure chambers from each other. The partition wall has a communicating portion that communicates the adjacent pressure chambers with each other.

Liquid discharge head

Growing community of inventors

Kawasaki, Japan

Yoshiyuki Nakagawa