Patents by Inventor Hidehiko Fujimura
Hidehiko Fujimura 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: 11828957Abstract: A display apparatus includes a laser radiation device, an object detection device, and a control device. The laser radiation device is configured to radiate laser light of a predetermined wavelength range to a display position in a gas to form a plasma in the display position. The object detection device is configured to detect presence or absence of an object in a predetermined space. The control device is configured to determine the predetermined space on a basis of the display position and intensity of the laser light scattered in the display position or having passed the display position.Type: GrantFiled: October 15, 2021Date of Patent: November 28, 2023Assignee: Canon Kabushiki KaishaInventors: Tsunenori Ashibe, Hidehiko Fujimura, Hiroyuki Kubo
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Patent number: 11552441Abstract: A display device includes a laser irradiation device and a control device. The laser irradiation device is configured to irradiate an irradiation point located at a display position in air, with a laser beam having a wavelength equal to or larger than 380 nm and equal to or smaller than 780 nm and produce plasma at the display position. The control device is configured to control intensity of the laser beam emitted from the at least one laser irradiation device so that a relationship between intensity of plasma light emitted from the plasma at the display position and intensity of scattered light produced from the laser beam and scattered by the plasma becomes a predetermined relationship to display a color pixel.Type: GrantFiled: November 15, 2019Date of Patent: January 10, 2023Assignee: Canon Kabushiki KaishaInventors: Tsunenori Ashibe, Hidehiko Fujimura, Katsuhiro Watanabe, Hiroyuki Morimoto, Shunsuke Kuboyama, Toshiji Nishiguchi
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Publication number: 20220036783Abstract: A display apparatus includes a laser radiation device, an object detection device, and a control device. The laser radiation device is configured to radiate laser light of a predetermined wavelength range to a display position in a gas to form a plasma in the display position. The object detection device is configured to detect presence or absence of an object in a predetermined space. The control device is configured to determine the predetermined space on a basis of the display position and intensity of the laser light scattered in the display position or having passed the display position.Type: ApplicationFiled: October 15, 2021Publication date: February 3, 2022Inventors: Tsunenori Ashibe, Hidehiko Fujimura, Hiroyuki Kubo
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Publication number: 20200184861Abstract: A display device includes a laser irradiation device and a control device. The laser irradiation device is configured to irradiate an irradiation point located at a display position in air, with a laser beam having a wavelength equal to or larger than 380 nm and equal to or smaller than 780 nm and produce plasma at the display position. The control device is configured to control intensity of the laser beam emitted from the at least one laser irradiation device so that a relationship between intensity of plasma light emitted from the plasma at the display position and intensity of scattered light produced from the laser beam and scattered by the plasma becomes a predetermined relationship to display a color pixel.Type: ApplicationFiled: November 15, 2019Publication date: June 11, 2020Inventors: Tsunenori Ashibe, Hidehiko Fujimura, Katsuhiro Watanabe, Hiroyuki Morimoto, Shunsuke Kuboyama, Toshiji Nishiguchi
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Patent number: 9895887Abstract: Provided is a liquid ejection head capable of stably ejecting a liquid at a practical liquid droplet velocity without separating minute liquid droplets before ejection of main liquid droplets in the case of reducing the amount of liquid droplets by reducing a nozzle diameter of the liquid ejection head. In a liquid ejection head including a nozzle for ejecting a liquid, a recess portion recessed relative to a nozzle inner wall surface is formed on a nozzle inner wall in a region having a nozzle inner diameter of 15 ?m or less.Type: GrantFiled: June 23, 2014Date of Patent: February 20, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Junri Ishikura, Yo Watanabe, Norihiko Ochi, Hidehiko Fujimura
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Patent number: 9796180Abstract: A liquid ejection device includes a piezoelectric transducer having a plurality of pressure chambers, a plurality of partitions dividing the plurality of pressure chambers, and a plurality of electrodes formed in the plurality of pressure chambers, respectively. The plurality of partitions each includes a first side wall and a second side wall that is positioned on a back surface side of the first side wall. The first side wall includes a first wall surface positioned at an upper portion thereof, the first wall surface being positioned so as to be set back in a normal direction from a second wall surface positioned below the first wall surface. A first electrode is formed on the second wall surface, and a second electrode is formed on the second side wall. An upper end of the second electrode is higher than an upper end of the first electrode.Type: GrantFiled: May 1, 2015Date of Patent: October 24, 2017Assignee: Canon Kabushiki KaishaInventors: Koji Kitani, Hidehiko Fujimura, Shumpei Tatsumi
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Patent number: 9630406Abstract: The present invention improves rigidity in a joining portion between a substrate and piezoelectric element, and provides a liquid discharging device having improved vibration properties. A liquid discharging device includes a pressure chamber made up of a space surrounded by a pair of side walls, a floor wall, and a ceiling wall; a substrate configured to make up at least one of the floor wall or ceiling wall; a liquid supplying unit configured to fill the pressure chamber with liquid; and an electrode having a pair of side walls made of piezoelectric elements, configured to apply voltage to the piezoelectric elements in order to shrink the volume of the pressure chamber by deforming the piezoelectric elements and to discharge liquid from the pressure chamber; wherein the tip side face portion of the piezoelectric element is restrained as to the substrate.Type: GrantFiled: November 12, 2012Date of Patent: April 25, 2017Assignee: Canon Kabushiki KaishaInventors: Youichi Fukaya, Hidehiko Fujimura, Norihiko Ochi
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Publication number: 20170100931Abstract: A liquid ejection device, including a piezoelectric transducer including a plurality of pressure chambers; a plurality of partitions dividing the plurality of pressure chambers; and a plurality of electrodes formed in the plurality of pressure chambers, respectively, wherein the plurality of partitions each include a first side wall and a second side wall that is positioned on a back surface side of the first side wall, wherein the first side wall includes a first wall surface positioned in an upper portion thereof, the first side wall being positioned so as to be set back from a second wall surface positioned below the first wall surface, a first electrode is formed on the second wall surface, a second electrode is formed on the second side wall, and a height of an upper end of the second electrode is larger than a height of an upper end of the first electrode.Type: ApplicationFiled: May 1, 2015Publication date: April 13, 2017Inventors: Koji Kitani, Hidehiko Fujimura, Shumpei Tatsumi
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Patent number: 9365037Abstract: To reduce a liquid discharge amount by vibrating meniscuses at high acceleration with displacement of partitions, a plurality of partitions, each formed of a piezoelectric material, are provided to thereby form a plurality of pressure chambers. Each of electrode pairs for shear-deforming each partition is arranged on both sides of a corresponding one of the partitions. A nozzle plate having nozzles each connected to one of the pressure chambers is arranged on the side of a first end of the pressure chambers. Each pressure chamber is formed such that the width of the pressure chamber becomes long as it approaches, from the first end, a second end on the opposite side.Type: GrantFiled: January 28, 2014Date of Patent: June 14, 2016Assignee: Canon Kabushiki KaishaInventors: Youichi Fukaya, Hidehiko Fujimura
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Publication number: 20160136952Abstract: Provided is a liquid ejection head capable of stably ejecting a liquid at a practical liquid droplet velocity without separating minute liquid droplets before ejection of main liquid droplets in the case of reducing the amount of liquid droplets by reducing a nozzle diameter of the liquid ejection head. In a liquid ejection head including a nozzle for ejecting a liquid, a recess portion recessed relative to a nozzle inner wall surface is formed on a nozzle inner wall in a region having a nozzle inner diameter of 15 ?m or less.Type: ApplicationFiled: June 23, 2014Publication date: May 19, 2016Inventors: Junri Ishikura, Yo Watanabe, Norihiko Ochi, Hidehiko Fujimura
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Patent number: 9193163Abstract: A liquid discharge apparatus in which controllability of liquid discharge speed is improved is provided. A pair of electrodes is arranged so as to divide a partition into a movable region to which an electric field for shear-deforming the partition at a portion on a nozzle side is applied and an immovable region to which the electric field is not applied at a portion on a common liquid chamber side. It is assumed that a cross-section area of a cross section along a face perpendicular to a longitudinal direction at a second end of an individual liquid chamber is S2, and a cross-section area along a face perpendicular to the longitudinal direction at a first boundary point closest to a first end on a boundary between the movable region and the immovable region is S1. The cross-section area S2 is made wider than the cross-section area S1.Type: GrantFiled: January 28, 2014Date of Patent: November 24, 2015Assignee: Canon Kabushiki KaishaInventors: Norihiko Ochi, Hidehiko Fujimura
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Publication number: 20140313262Abstract: The present invention improves rigidity in a joining portion between a substrate and piezoelectric element, and provides a liquid discharging device having improved vibration properties. A liquid discharging device includes a pressure chamber made up of a space surrounded by a pair of side walls, a floor wall, and a ceiling wall; a substrate configured to make up at least one of the floor wall or ceiling wall; a liquid supplying unit configured to fill the pressure chamber with liquid; and an electrode having a pair of side walls made of piezoelectric elements, configured to apply voltage to the piezoelectric elements in order to shrink the volume of the pressure chamber by deforming the piezoelectric elements and to discharge liquid from the pressure chamber; wherein the tip side face portion of the piezoelectric element is restrained as to the substrate.Type: ApplicationFiled: November 12, 2012Publication date: October 23, 2014Applicant: Canon Kabushiki KaishaInventors: Youichi Fukaya, Hidehiko Fujimura, Norihiko Ochi
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Publication number: 20140217198Abstract: A liquid discharge apparatus in which controllability of liquid discharge speed is improved is provided. A pair of electrodes is arranged so as to divide a partition into a movable region to which an electric field for shear-deforming the partition at a portion on a nozzle side is applied and an immovable region to which the electric field is not applied at a portion on a common liquid chamber side. It is assumed that a cross-section area of a cross section along a face perpendicular to a longitudinal direction at a second end of an individual liquid chamber is S2, and a cross-section area along a face perpendicular to the longitudinal direction at a first boundary point closest to a first end on a boundary between the movable region and the immovable region is S1. The cross-section area S2 is made wider than the cross-section area S1.Type: ApplicationFiled: January 28, 2014Publication date: August 7, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Norihiko Ochi, Hidehiko Fujimura
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Patent number: 7111755Abstract: It is an object of this invention to make the amounts of liquid discharged from the nozzles of a liquid discharge head uniform. To achieve this object, there is provided a liquid discharge apparatus for discharging a liquid to a medium using a liquid discharge head having a plurality of nozzles for discharging the liquid, characterized by comprising a discharge amount changing device which can change the amounts of liquid discharged from the respective nozzles of the liquid discharge head independently of each of the plurality of nozzles, the discharge amount changing device including a voltage control device which can change a driving voltage value of a driving pulse to be supplied to each of the plurality of nozzles.Type: GrantFiled: June 27, 2003Date of Patent: September 26, 2006Assignee: Canon Kabushiki KaishaInventors: Yoshihiro Koyama, Seiichirou Satomura, Makoto Akahira, Hidehiko Fujimura
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Patent number: 6860779Abstract: A method for manufacturing an airtight vessel seals an evacuation tube after evacuating the inside of the vessel using the evacuation tube. A getter previously disposed in the vessel is activated followed by fusing a part of the evacuation tube to seal the vessel while heating the vessel.Type: GrantFiled: May 11, 1999Date of Patent: March 1, 2005Assignee: Canon Kabushiki KaishaInventors: Hidehiko Fujimura, Toru Aruga, Masaaki Ogura
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Patent number: 6851780Abstract: In order that the volume of a liquid drop can increase and the drop can reach with high precision even if the distance between a head nozzle and a plotted base is short, there is provided a driving method for a liquid discharge head including: a discharge port for discharging liquid; a pressure-applying portion communicating with the discharge port, for applying a pressure for discharge to the liquid; and a pressure generating device for generating the pressure, the method including a step of applying a first discharge pulse for discharging liquid and a second discharge pulse for discharging liquid to the pressure generating device in a sequential manner in response to an instruction of one-dot discharge, in which the pulse width of the first discharge pulse, the pulse width of the second discharge pulse, and a rest time between the first discharge pulse and the second discharge pulse are determined so that a first liquid discharged in response to the first discharge pulse has a volume equal to or greater thaType: GrantFiled: September 30, 2003Date of Patent: February 8, 2005Assignee: Canon Kabushiki KaishaInventors: Hidehiko Fujimura, Ryoko Horie
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Publication number: 20040061731Abstract: In order that the volume of a liquid drop can increase and the drop can reach with high precision even if the distance between a head nozzle and a plotted base is short, there is provided a driving method for a liquid discharge head including: a discharge port for discharging liquid; a pressure-applying portion communicating with the discharge port, for applying a pressure for discharge to the liquid; and a pressure generating device for generating the pressure, the method including a step of applying a first discharge pulse for discharging liquid and a second discharge pulse for discharging liquid to the pressure generating device in a sequential manner in response to an instruction of one-dot discharge, in which the pulse width of the first discharge pulse, the pulse width of the second discharge pulse, and a rest time between the first discharge pulse and the second discharge pulse are determined so that a first liquid discharged in response to the first discharge pulse has a volume equal to or greater thaType: ApplicationFiled: September 30, 2003Publication date: April 1, 2004Applicant: CANON KABUSHIKI KAISHAInventors: Hidehiko Fujimura, Ryoko Horie
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Publication number: 20040023567Abstract: It is an object of this invention to make the amounts of liquid discharged from the nozzles of a liquid discharge head uniform. To achieve this object, there is provided a liquid discharge apparatus for discharging a liquid to a medium using a liquid discharge head having a plurality of nozzles for discharging the liquid, characterized by comprising a discharge amount changing device which can change the amounts of liquid discharged from the respective nozzles of the liquid discharge head independently of each of the plurality of nozzles, the discharge amount changing device including a voltage control device which can change a driving voltage value of a driving pulse to be supplied to each of the plurality of nozzles.Type: ApplicationFiled: June 27, 2003Publication date: February 5, 2004Applicant: Canon Kabushiki KaishaInventors: Yoshihiro Koyama, Seiichirou Satomura, Makoto Akahira, Hidehiko Fujimura
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Patent number: 6676238Abstract: A driving method for a liquid discharge head having a discharge port for discharging liquid; a pressure-applying portion communicating with the discharge port, for applying discharge pressure to the liquid; and a pressure generating device for generating the pressure. The method includes a step of applying first and second discharge pulses for discharging liquid, to the pressure generating device in a sequential manner in response to a one-dot discharge instruction. The pulse widths of the first and second discharge pulses and a rest time between the first and second discharge pulses are determined so that the volume of a first liquid discharged in response to the first discharge pulse is equal to or greater than that of a second liquid discharged in response to the second discharge pulse and the discharge speed of the first liquid is lower than the discharge speed of the second liquid.Type: GrantFiled: September 12, 2002Date of Patent: January 13, 2004Assignee: Canon Kabushiki KaishaInventors: Hidehiko Fujimura, Ryoko Horie
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Publication number: 20030067500Abstract: In order that the volume of a liquid drop can increase and the drop can reach with high precision even if the distance between a head nozzle and a plotted base is short, there is provided a driving method for a liquid discharge head including: a discharge port for discharging liquid; a pressure-applying portion communicating with the discharge port, for applying a pressure for discharge to the liquid; and a pressure generating device for generating the pressure, the method including a step of applying a first discharge pulse for discharging liquid and a second discharge pulse for discharging liquid to the pressure generating device in a sequential manner in response to an instruction of one-dot discharge, in which the pulse width of the first discharge pulse, the pulse width of the second discharge pulse, and a rest time between the first discharge pulse and the second discharge pulse are determined so that a first liquid discharged in response to the first discharge pulse has a volume equal to or greater thaType: ApplicationFiled: September 12, 2002Publication date: April 10, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Hidehiko Fujimura, Ryoko Horie