Canon Kabushiki Kaisha

Tomoko Kudo

Ryo Kasai

Nobuyuki Hirayama

Tatsuo Furukawa

Kazuhiro Yamada

Yoshiyuki Nakagawa

Takuro Yamazaki

Takashi Sugawara

Masafumi Morisue

Takaaki Yamaguchi

Masataka Sakurai

Yoshiyuki Imanaka

Kimiyuki Hayasaki

Masaki Oikawa

Hideo Tamura

Keiji Tomizawa

Kousuke Kubo

Kengo Umeda

Koichi Omata

Tomoyuki Inoue

Toshio Negishi

Ryoji Oohashi

Yoshihiro Hamada

Yuuji Tamaru

A liquid ejection head includes a pair of electrodes disposed on a first surface of a substrate forming part of a flow path for a liquid. The electrodes of the pair of electrodes are adjacent to each other in a transverse direction of the electrodes, and the liquid moves in the transverse direction upon application of a voltage across the electrodes. The electrodes each include a ridge portion disposed on the first surface and an electrode wiring line connected to a power source for applying the voltage. The electrode wiring line covers an upper surface of the ridge portion and side surfaces of the ridge portion and extends from parts covering the side surfaces of the ridge portion to a downstream side and an upstream side with respect to a direction in which the liquid moves, so as to cover the first surface.

Liquid ejection head and method for manufacturing the same

A liquid ejection head including: a substrate; an energy generating element, which is provided on the substrate and is utilized to eject liquid; a first film provided on the energy generating element; a flow path forming member, which has an ejection orifice from which the liquid is ejected and forms a flow path of the liquid between the substrate and the flow path forming member; and an electrode, which generates a flow of the liquid, wherein the electrode includes the first film.

Liquid ejection head and method of manufacturing the same

A liquid ejection head is manufactured by forming on a substrate an energy generating element for ejecting a liquid, an integrated circuit for driving the energy generating element, a supply port for the liquid so as to penetrate through the substrate, an electrode for generating a liquid flow, and a flow path forming member having an ejection orifice for ejecting the liquid such that a flow path for the liquid is formed between the substrate and the flow path forming member. The electrode is formed over high and low of a stepped shape formed on the substrate in at least one step selected from the steps of forming the energy generating element, forming the integrated circuit and forming the supply port.

A liquid ejecting head includes an element substrate including a common liquid chamber connected to a liquid supply source, a pressure chamber connected to the common liquid chamber and including inside an element to generate energy used for ejecting liquid, a bubble generating chamber connected to the common liquid chamber and including inside a pump to cause a flow of the liquid, and a connection flow path connecting the pressure chamber and the bubble generating chamber. The liquid ejecting head includes a first anti-cavitation film over the element to generate the energy and a second anti-cavitation film over the pump, and the first anti-cavitation film and the second anti-cavitation film have different film thicknesses.

Liquid ejecting head

Provided is a liquid ejection head including: a substrate; an energy-generating element, which is arranged on the substrate, and is used for ejecting a liquid; a flow path forming member, which has an ejection orifice for ejecting the liquid, and is configured to form a flow path of the liquid between the flow path forming member and the substrate; an electrode configured to generate a flow of the liquid; and a wiring, which is arranged so as to be brought into contact with the flow path forming member, and is configured to supply electric power to the electrode, in which the flow path forming member contains an organic material, and in which the electrode and the wiring are each formed of a conductive adhesive layer containing at least one of conductive diamond-like carbon or tin-doped indium oxide.

A liquid ejection head including a substrate, an energy generating element which is provided on the substrate and is used for ejecting a liquid, a flow passage forming member which includes an ejection orifice, which ejects the liquid, and which forms a flow passage of the liquid between the flow passage forming member and the substrate, and an electrode which is provided on a surface of the flow passage forming member which adjoins the flow passage and which generates a flow of the liquid, in which at least a portion of the electrode is covered within the flow passage forming member.

Liquid ejection head

A liquid ejection head includes a substrate including an electrically insulating film, an energy generating element provided on the substrate and configured to generate energy used to eject a liquid, a flow path formed through the substrate and communicating with an ejection port configured to eject a liquid, and a wiring layer formed in the electrically insulating film of the substrate, used to drive the energy generating element, provided apart from a wall defining the flow path, and provided to surround the flow path in a plan view of the substrate.

Liquid ejection head and liquid ejection apparatus

If the shape of an element substrate is a parallelogram, a trapezoid, an uneven shape, or the like, there is no region where a driver transistor corresponding to a heater in the vicinity of an end portion of the element substrate is arranged, and thus the heater cannot be arranged near the end portion. The layout arrangement of driving circuits suitable for the substrate shape is required while suppressing an increase in the area of the element substrate. In an embodiment of this invention, the diffusion layer of the drain electrode of a driver transistor for driving a heater is divided in a direction perpendicular to that in which heaters are arranged, and the divided portions are connected to form one driver transistor. The divided portions are arranged stepwise.

Element substrate and liquid discharge head

A substrate includes a first and a second element arrays in each of which a plurality of elements is arrayed along a first direction of the substrate, a first and a second pad arrays in which a plurality of pads is arrayed along respective two opposite sides extending along a second direction of the substrate, a reception circuit configured to receive data for driving the elements, a data circuit configured to generate data corresponding to the first and the second element array, respectively based on the received data, a signal generation circuit configured to generate a period signal for determining a drive period of the elements based on the generated data, and an output circuit configured to output information related to the substrate.

Recording element substrate

A printing element substrate, comprising a plurality of printing elements which form a plurality of groups, a first generating unit configured to generate a threshold signal set for each of the plurality of groups and a ramp signal, based on an externally received digital signal, and second generating units, which are arranged in correspondence with the respective groups, configured to generate, based on the ramp signal and the threshold signal, enable signals for setting a period during which the printing element is driven.

Printhead substrate, printhead, and printing apparatus

An embodiment of this invention relates to an element substrate that implements size reduction of the element substrate and simplification of the arrangement as well as a highly-reliable print operation, a printhead using the same, and a printing apparatus including the printhead. In the element substrate according to this embodiment, the slope of a ramp wave is changed to generate a plurality of pulses using one reference voltage. The slope of the ramp wave can be changed by changing the mirror ratio or the capacitance of a comparator as well as by changing the resistance of a DAC.

Element substrate, printhead, and printing apparatus

A print head is provided that well preserves ink characteristics upon printing by way of performing effective ink preliminary heating. The print head has heaters and ejection openings formed at locations corresponding to the heaters. Viewed from the side from which ink is ejected, a sub-heater is established in the print head between the ink supply port and the print elements so as to surround the ink supply port.

A printhead substrate comprises: a plurality of printing elements arrayed in a predetermined direction; first logic circuits arranged in correspondence with respective groups each assigned to a predetermined number of adjacent printing elements, and configured to select a printing element to be driven from the printing elements belonging to each of the groups; driving circuits configured to drive the printing elements based on signals output from the first logic circuits; second logic circuits configured to supply externally input printing data to the first logic circuits corresponding to the respective groups; and electricity storage units arranged in the respective groups, connected to a power supply line for supplying power to at least one of the first logic circuits, the second logic circuits, and the driving circuits, and configured to store charges in accordance with a voltage applied through the power supply line.

Printhead substrate, printhead and printing apparatus

A recording element substrate which is provided with a first recording element group and a second recording element group, each group including a plurality of recording elements. The recording element substrate includes a first terminal configured to input a data signal, a second terminal configured to input a latch signal, a shift register configured to receive the data signal input from the first terminal, a first latch circuit configured to latch data stored in the shift register based on the latch signal of a first pulse width input from the second terminal, a second latch circuit configured to latch the data stored in the shift register based on the latch signal of a second pulse width which is shorter than the first pulse width of the latch signal input from the second terminal, a first driving circuit configured to control driving of the recording elements included in the first recording element group based on a signal output from the first latch circuit, and a second driving circuit configured to control driving of the recording elements included in the second recording element group based on a signal output from the second latch circuit.

Recoding element substrate, recording head equipped with the same, recording head cartridge, and recording apparatus

A recording head having a plurality of recording elements that are grouped into a plurality of blocks and ejecting ink by driving the recording elements in a time-divisional manner includes driving units configured to drive the recording elements, an input unit configured to receive an enable signal that defines a period during which the driving of the recording elements is enabled at one ink ejection, and a control unit configured to control the time-divisional driving by the driving units on the basis of pulses detected during the period defined by the enable signal received by the input unit.

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Kawasaki, Japan

Tomoko Kudo