Canon Kabushiki Kaisha

Kao Corporation

The University of Tokyo

Yupo Corporation

Mitsubishi Denki Kabushiki Kaisha

Nec Corportion

Kao Kabushiki Kaisha

Kao Kabushiki Kaisha (kao Corporation)

Koa Kabushiki Kaisha (kao Corporation)

Koichi Ishida

Shuzo Iwanaga

Yoshiyuki Nakagawa

Shintaro Kasai

Takatsugu Moriya

Akiko Saito

Tomohiro Sato

Nobuhito Yamaguchi

Hiroshi Arimizu

Arihito Miyakoshi

Masahiko Kubota

Yoshinori Itoh

Akiko Hammura

Shingo Okushima

Shinji Kishikawa

Ken Takeuchi

Ken Tsuchii

Makoto Takamiya

Takayasu Sakurai

Yumi Komamiya

Yusuke Imahashi

Makoto Aoki

Kazuhiro Yamada

Ryo Kasai

Yoshinori Misumi

Toru Nakakubo

Masaki Oikawa

Masataka Sakurai

Yuzuru Ishida

Tatsuya Yamada

Tomoki Ishiwata

Takayuki Sekine

Ayako Iwasaki

Ayako Tozuka

Tadashi Yasufuku

Kimihiko Hori

Manabu Kaneda

Akira Sakaguchi

Keiji Yoshii

Yasuhiro Komori

Tomohiro Uemura

Shuichi Tsuchiya

Kumiko Tajima

Tomoko Nomura

Keiko Suzuki

Teruyoshi Hatanaka

Takuro Yamazaki

Masakazu Kobayashi

Maki Kato

Hiroshi Koike

Yoshihiro Hamada

Seiichiro Iida

Tsubasa Funabashi

Tamio Shikano

Katsukuni Nitta

Toshio Uesaka

Takuji Kume

Yoshinao Miura

Kyoko Tanaka

Seiji Honma

Tamaki Saburi

Toshihiko Kayukawa

Yusuke Itaba

Yoji Jokura

Yuri Kato

A liquid ejection head includes a print element substrate having an ejection port surface in which a plurality of ejection ports are arranged and a temperature control unit that controls a temperature of the ejection port surface. The print element substrate ejects a liquid from the plurality of ejection ports onto a medium moved by the liquid ejection head relatively to the liquid ejection head. The ejection port surface includes a region on a downstream side of the ejection port surface in a direction in which the medium relatively moves when the medium is viewed from the liquid ejection head, and includes a region on an upstream side of the ejection port surface in the relative moving direction. The temperature control unit control the temperature of the ejection port surface so that a temperature of the downstream side region becomes higher than a temperature of the upstream side region.

Liquid ejection head and liquid ejection 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

An element substrate of a liquid ejection head includes an ejection opening array in which multiple ejection openings are arranged along a predetermined direction, pressure chambers communicating with the ejection openings, and heat generating elements for ejecting liquid, supplied to the pressure chambers, through the ejection openings. The element substrate also includes a predetermined supply path extending in the predetermined direction and communicating with the pressure chambers, a predetermined collection path communicating with the pressure chambers, multiple liquid supply ports communicating with the supply path at different positions in the predetermined direction, and a liquid collection port communicating with the collection path. Among the multiple liquid supply ports, at least a liquid supply port located at an end portion in the predetermined direction has an opening area larger than the opening area of the liquid collection port.

Liquid ejection head, liquid ejection apparatus, and printing apparatus

A liquid discharge head includes a flow passage forming member, an element substrate including a liquid discharge element and a surface on which a conductive member made from a metallic material is disposed, and an intermediate layer made from a resin material and configured to join the flow passage forming member and the surface of the element substrate to each other. The intermediate layer is disposed in a state, separated from the conductive member, where the conductive member is exposed from the intermediate layer. The conductive member is covered with the flow passage forming member.

A liquid ejection head including recording element substrates each including ejection opening rows in which ejection openings ejecting liquid are arranged, the plurality of ejection opening rows being juxtaposed in a relative movement direction with respect to the printed medium. In the relative movement direction of the printed medium when the printed medium is viewed from the liquid ejection head, and in the plurality of ejection opening rows provided in the recording element substrate, among the plurality of recording element substrates, positioned on an upstream side in the relative movement direction, arrangement intervals of ejection openings in an end area of an ejection opening row positioned on a most upstream side in the relative movement direction are smaller than arrangement intervals of ejection openings in an end area of an ejection opening row positioned on a most downstream side in the relative movement direction.

Liquid ejection head and recording apparatus

A liquid ejection head including first and second recording element substrates adjacent in a direction intersecting a relative movement direction include ejection opening rows that include ejection openings arranged in the intersecting direction. A straight line connecting the ejection openings in end portions on a second recording element substrate side in the first recording element substrate and a straight line connecting the ejection openings in end portions on a first recording element substrate side in the second recording element substrate are inclined towards a middle area side of the first recording element substrate, and arrangement intervals of the ejection openings in an end portion area on the second recording element substrate side of a first ejection opening row is larger than arrangement intervals of the ejection openings in an end portion area on the first recording element substrate side of a second ejection opening row.

A liquid discharge head includes a recording element configured to generate thermal energy and a discharge orifice disposed at a position facing the recording element. A bubble is generated in liquid by the thermal energy, liquid between the bubble and the discharge orifice is discharged from the discharge orifice by the pressure of the generated bubble, and the bubble communicates with the atmosphere on the outside of the discharge orifice.

A print element substrate and a liquid ejection head capable of suppressing degradation of a print quality caused by a white stripe/black stripe etc., is actualized without using a high degree of microfabrication technology. As a result of asymmetric deformation by swelling in a direction of relative movement to a print medium, print elements having different liquid droplet ejection directions are made to coexist and arrayed for that purpose.

Print element substrate and liquid ejection head

A liquid discharging head includes a discharge port that discharges a liquid, a pressure chamber that communicates with the discharge port, and an energy generating element that is disposed in the pressure chamber. In the liquid discharging head, the discharge port is provided with a plurality of projections that project towards a central portion of the discharge port from an inner peripheral edge of the discharge port, and an interval between the projections at a location where the projections are closest to each other is 5 &#x3bc;m or less.

Liquid discharging head and liquid discharging device

A print head substrate includes: a substrate surface including a plurality of printing elements and a plurality of pads disposed along a first side and electrically connected to the printing elements, the substrate surface having an acute angle portion formed by the first side and a second side; and a test element group (TEG) area including a TEG not electrically connected to the printing elements, at least a part of the TEG area being located between the second side and a pad closest to a vertex of the acute angle portion among the pads.

Print head substrate and method of manufacturing the same, and semiconductor substrate

A plurality of pressure chambers are formed in a circulation channel for liquid in order to array ejection ports in a high density in association with the circulation channel. The circulation channel is connected to a penetration supply path and a penetration recovery path that penetrate a substrate.

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Tokyo, Japan

Koichi Ishida