Patents by Inventor Takamitsu Tokuda
Takamitsu Tokuda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11917748Abstract: Provided is an electric wiring member supported by a support member that supports a recording element substrate configured to eject a liquid. The electric wiring member has a signal line for transmitting a drive signal used for driving the recording element substrate, a power line for supplying drive power to the recording element substrate, and a heat generating resistive line for heating the support member. The power line is arranged between the signal line and the heat generating resistive line.Type: GrantFiled: March 16, 2022Date of Patent: February 27, 2024Assignee: Canon Kabushiki KaishaInventor: Takamitsu Tokuda
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Publication number: 20230311486Abstract: An object of the present disclosure is to reduce a width of a flexible electric wiring board and to downsize a print head. An aspect of the present disclosure provides a flexible electric wiring board including: a selection unit configured to select one type of a drive signal out of a plurality of types of drive signals for driving a piezoelectric element; a plurality of drive signal lines including drive signal lines to transmit the plurality of types of the drive signals to the selection unit, respectively; and a control signal line configured to transmit a control signal to the selection unit in order to select the one type of the drive signal, in which the plurality of types of the drive signal lines have mutually different line widths.Type: ApplicationFiled: March 29, 2023Publication date: October 5, 2023Inventors: TAKAMITSU TOKUDA, SHINGO OKUSHIMA
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Publication number: 20230088138Abstract: A flexible printed circuit board whose end part side is connected to a print element substrate capable of ejecting ink using a print element, so as to be capable of transmitting a signal from a control part of a printing apparatus to the print element substrate via wiring and to be capable of transmitting a signal from the print element substrate to the control part via the wiring, wherein a side part side of high-potential wiring includes at least one of a regulation part that regulates penetration of ink and a wiring part that is configured with low-potential ground wiring and low-potential liquid signal line whose signal value transmitted by the control part or operation based on a signal is monitored.Type: ApplicationFiled: September 13, 2022Publication date: March 23, 2023Inventors: Takuma Kodoi, Takamitsu Tokuda, Satoshi Kimura
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Publication number: 20220304141Abstract: Provided is an electric wiring member supported by a support member that supports a recording element substrate configured to eject a liquid. The electric wiring member has a signal line for transmitting a drive signal used for driving the recording element substrate, a power line for supplying drive power to the recording element substrate, and a heat generating resistive line for heating the support member. The power line is arranged between the signal line and the heat generating resistive line.Type: ApplicationFiled: March 16, 2022Publication date: September 22, 2022Inventor: Takamitsu Tokuda
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Patent number: 10987922Abstract: A printing apparatus, comprises: a printhead substrate; an application circuit for applying a driving signal to the driving element; a ground line connected to the application circuit; a plurality of temperature sensors that detects temperature relate to the printhead substrate, wherein the cathode side of the plurality of temperature sensors connects the ground line via a resistance; a first selection circuit, on an anode side of the plurality of temperature sensors, that selects one temperature sensor; a second selection circuit, on the cathode side of the plurality of temperature sensor, that selects the one temperature sensor; and a temperature signal output circuit that outputs a temperature signal in accordance with a difference between a voltage of an anode side and a voltage of a cathode side of the selected temperature sensor.Type: GrantFiled: August 1, 2019Date of Patent: April 27, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Ryo Kasai, Kengo Umeda, Takamitsu Tokuda
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Patent number: 10864725Abstract: An element substrate including heaters, drivers for each heater, and a diode, and connected to an external apparatus having a circuit for detecting a temperature based on a detection signal from the diode, comprises: a first wiring grounded, connected to one end of the diode, and serving as a reference voltage of the detection signal; a second wiring connected to the first wiring near the diode; a first pad connected to the first wiring; and a second pad connected to the second wiring. When the substrate is connected to the apparatus, a wiring serving as a reference voltage for a side where the detection signal of the circuit of the apparatus is inputted is connected to the second pad via the first pad connected to a ground serving as a reference voltage of the apparatus.Type: GrantFiled: October 30, 2019Date of Patent: December 15, 2020Assignee: CANON KABUSHIKI KAISHAInventor: Takamitsu Tokuda
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Publication number: 20200139706Abstract: An element substrate including heaters, drivers for each heater, and a diode, and connected to an external apparatus having a circuit for detecting a temperature based on a detection signal from the diode, comprises: a first wiring grounded, connected to one end of the diode, and serving as a reference voltage of the detection signal; a second wiring connected to the first wiring near the diode; a first pad connected to the first wiring; and a second pad connected to the second wiring. When the substrate is connected to the apparatus, a wiring serving as a reference voltage for a side where the detection signal of the circuit of the apparatus is inputted is connected to the second pad via the first pad connected to a ground serving as a reference voltage of the apparatus.Type: ApplicationFiled: October 30, 2019Publication date: May 7, 2020Inventor: Takamitsu Tokuda
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Patent number: 10538084Abstract: A liquid ejection head includes an element substrate for ejecting a liquid, an integrated circuit board outputting a control signal for controlling the element substrate, and an electrical wiring board connected electrically to the element substrate. The electrical wiring board has a signal line connector to which control signals are inputted and electrical wiring board connectors to which an electric signal for driving the liquid ejection head is inputted. The signal line connector and the electrical wiring board connectors are disposed on opposite sides to each other relative to a center line extending orthogonally to a longitudinal direction of the electrical wiring board.Type: GrantFiled: June 29, 2018Date of Patent: January 21, 2020Assignee: Canon Kabushiki KaishaInventors: Takuma Kodoi, Takuya Iwano, Takamitsu Tokuda
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Publication number: 20190381790Abstract: A printing apparatus, comprises: a printhead substrate; an application circuit for applying a driving signal to the driving element; a ground line connected to the application circuit; a plurality of temperature sensors that detects temperature relate to the printhead substrate, wherein the cathode side of the plurality of temperature sensors connects the ground line via a resistance; a first selection circuit, on an anode side of the plurality of temperature sensors, that selects one temperature sensor; a second selection circuit, on the cathode side of the plurality of temperature sensor, that selects the one temperature sensor; and a temperature signal output circuit that outputs a temperature signal in accordance with a difference between a voltage of an anode side and a voltage of a cathode side of the selected temperature sensor.Type: ApplicationFiled: August 1, 2019Publication date: December 19, 2019Inventors: Ryo Kasai, Kengo Umeda, Takamitsu Tokuda
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Patent number: 10406808Abstract: A printing apparatus, comprises: a printhead substrate; an application circuit for applying a driving signal to the driving element; a ground line connected to the application circuit; a plurality of temperature sensors that detects temperature relate to the printhead substrate, wherein the cathode side of the plurality of temperature sensors connects the ground line via a resistance; a first selection circuit, on an anode side of the plurality of temperature sensors, that selects one temperature sensor; a second selection circuit, on the cathode side of the plurality of temperature sensor, that selects the one temperature sensor; and a temperature signal output circuit that outputs a temperature signal in accordance with a difference between a voltage of an anode side and a voltage of a cathode side of the selected temperature sensor.Type: GrantFiled: June 15, 2018Date of Patent: September 10, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Ryo Kasai, Kengo Umeda, Takamitsu Tokuda
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Publication number: 20190009533Abstract: A liquid ejection head includes an element substrate 10 for ejecting a liquid, an integrated circuit board 14 outputting a control signal for controlling the element substrate, and an electrical wiring board 11 connected electrically to the element substrate. The electrical wiring board 11 has a signal line connector 25 to which control signals are inputted, electrical wiring board connectors 22-24 to which electric signal for driving the liquid ejection head is inputted. The signal line connector 25 and the electrical wiring board connectors 22-24 are disposed on opposite sides to each other relative to a center line C extending orthogonally to a longitudinal direction of the electrical wiring board 11.Type: ApplicationFiled: June 29, 2018Publication date: January 10, 2019Inventors: Takuma Kodoi, Takuya Iwano, Takamitsu Tokuda
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Publication number: 20190001667Abstract: A printing apparatus, comprises: a printhead substrate; an application circuit for applying a driving signal to the driving element; a ground line connected to the application circuit; a plurality of temperature sensors that detects temperature relate to the printhead substrate, wherein the cathode side of the plurality of temperature sensors connects the ground line via a resistance; a first selection circuit, on an anode side of the plurality of temperature sensors, that selects one temperature sensor; a second selection circuit, on the cathode side of the plurality of temperature sensor, that selects the one temperature sensor; and a temperature signal output circuit that outputs a temperature signal in accordance with a difference between a voltage of an anode side and a voltage of a cathode side of the selected temperature sensor.Type: ApplicationFiled: June 15, 2018Publication date: January 3, 2019Inventors: Ryo Kasai, Kengo Umeda, Takamitsu Tokuda
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Patent number: 9033439Abstract: An apparatus including: a control unit configured to control a switch that performs switching between a charging path for charging a first power storage unit provided in a carriage having a printhead mounted thereon by power supplied from a power source and a charging path for charging the first power storage unit by power supplied from a second power storage unit that is provided in a main body of the printing apparatus equipped with the carriage and has a capacity higher than the first power storage unit; and a determining unit configured to determine whether or not the second power storage unit has a power storage capacity less than a threshold value, wherein the control unit controls the switch such that the first power storage unit can be charged by the power supplied from the power source if it is determined by the determining unit that the power storage capacity of the second power storage unit is less than the threshold value.Type: GrantFiled: April 4, 2014Date of Patent: May 19, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Takamitsu Tokuda, Masao Mori, Kimiyuki Hayasaki
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Publication number: 20140307013Abstract: An apparatus including: a control unit configured to control a switch that performs switching between a charging path for charging a first power storage unit provided in a carriage having a printhead mounted thereon by power supplied from a power source and a charging path for charging the first power storage unit by power supplied from a second power storage unit that is provided in a main body of the printing apparatus equipped with the carriage and has a capacity higher than the first power storage unit; and a determining unit configured to determine whether or not the second power storage unit has a power storage capacity less than a threshold value, wherein the control unit controls the switch such that the first power storage unit can be charged by the power supplied from the power source if it is determined by the determining unit that the power storage capacity of the second power storage unit is less than the threshold value.Type: ApplicationFiled: April 4, 2014Publication date: October 16, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Takamitsu Tokuda, Masao Mori, Kimiyuki Hayasaki
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Patent number: 8672452Abstract: A liquid discharge head includes a liquid discharge head substrate including a discharge port through which a liquid is discharged, and a plurality of energy generating elements that generate energy for discharging the liquid from the discharge port, and a circuit board having flexibility including a pair of differential transmission lines for transmitting differential transmission signals used as logical signals for driving the energy generating elements, to the liquid discharge head substrate, and a voltage supply line for supplying a voltage applied to the energy generating elements to obtain the energy, to the liquid discharge head substrate, wherein the pair of differential transmission lines is provided on one surface of the circuit board, and the voltage supply line is provided on the other surface of the circuit board, which is on a reverse side of the one surface.Type: GrantFiled: May 11, 2011Date of Patent: March 18, 2014Assignee: Canon Kabushiki KaishaInventors: Kimiyuki Hayasaki, Takamitsu Tokuda, Kengo Umeda, Nobuyuki Hirayama, Takaaki Yamaguchi, Yoshiyuki Imanaka, Tatsuo Furukawa
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Publication number: 20110285788Abstract: A liquid discharge head includes a liquid discharge head substrate including a discharge port through which a liquid is discharged, and a plurality of energy generating elements that generate energy for discharging the liquid from the discharge port, and a circuit board having flexibility including a pair of differential transmission lines for transmitting differential transmission signals used as logical signals for driving the energy generating elements, to the liquid discharge head substrate, and a voltage supply line for supplying a voltage applied to the energy generating elements to obtain the energy, to the liquid discharge head substrate, wherein the pair of differential transmission lines is provided on one surface of the circuit board, and the voltage supply line is provided on the other surface of the circuit board, which is on a reverse side of the one surface.Type: ApplicationFiled: May 11, 2011Publication date: November 24, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kimiyuki Hayasaki, Takamitsu Tokuda, Kengo Umeda, Nobuyuki Hirayama, Takaaki Yamaguchi, Yoshiyuki Imanaka, Tatsuo Furukawa