Patents by Inventor Takashi Iwaki

Takashi Iwaki 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).

  • Patent number: 10812039
    Abstract: An acoustic wave resonator includes: a piezoelectric substrate that is a lithium tantalate substrate or a lithium niobate substrate and has a thickness of 20 ?m or less; a support substrate that has an upper surface bonded with a lower surface of the piezoelectric substrate And is a glass substrate mainly composed of silicon oxide; a plurality of electrode fingers that are located on an upper surface of the piezoelectric substrate, excite an acoustic wave, and include a metal film mainly composed of at least one of Cr, Mo, and W.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: October 20, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Masafumi Iwaki, Takashi Matsuda
  • Patent number: 10763822
    Abstract: An acoustic wave resonator includes: a piezoelectric substrate; and an IDT that is located on the piezoelectric substrate and includes comb-shaped electrodes facing each other, each of the comb-shaped electrodes having grating electrode and a bus bar connected to the grating electrodes, a duty ratio of grating electrodes of the comb-shaped electrodes in a center region of an overlap region differing from a duty ratio of grating electrodes of the comb-shaped electrodes in an edge region of the overlap region in an arrangement direction of the grating electrodes, the grating electrodes of each of the comb-shaped electrodes overlapping with the grating electrodes of the other in the overlap region, a grating electrode of a first one of the comb-shaped electrodes in the center region having a different width from a grating electrode of a second one of the comb-shaped electrodes in the center region.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: September 1, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Takashi Matsuda, Masafumi Iwaki
  • Patent number: 10700662
    Abstract: An acoustic wave device includes: a piezoelectric substrate; and a pair of comb-shaped electrodes that is located on the piezoelectric substrate, includes a metal film, and excites a surface acoustic wave, the metal film being mainly composed of a metal having a melting point equal to or higher than a melting point of Pt, the metal film having a first region in which a crystal grain has a columnar shape and a second region that is located on and/or under the first region in a stacking direction and has less crystallinity than the first region or has an amorphous structure.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: June 30, 2020
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Shinpei Miura, Satoshi Imasu, Takashi Matsuda, Masafumi Iwaki
  • Patent number: 10539576
    Abstract: An object of the present invention is to develop and provide a lung cancer differential marker with which lung cancer can be diagnosed conveniently and highly sensitively without depending only on increase or decrease in protein expression level between cancer patients and healthy persons. Another object of the present invention is to develop and provide a glycan marker capable of distinguishing histological types of lung cancer. Of serum glycoproteins, glycopeptide and glycoprotein groups whose glycan structures were altered specifically in lung cancer cell culture supernatants were identified, and they are provided as lung cancer differential markers.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: January 21, 2020
    Assignees: National Institute of Advanced Industrial Science and Technology, Tokyo Medical University
    Inventors: Hisashi Narimatsu, Akira Togayachi, Yuzuru Ikehara, Hiroyuki Kaji, Atsushi Kuno, Takashi Ohkura, Hideki Matsuzaki, Yoshitoshi Hirao, Jun Iwaki, Minako Abe, Masaharu Nomura, Masayuki Noguchi
  • Patent number: 10483944
    Abstract: A multiplexer includes: a first filter including a series resonator connected in series and a parallel resonator connected in parallel between a common terminal and a first terminal, each of the series resonator and the parallel resonator including an IDT located on a piezoelectric substrate, first and second regions being alternately located in an extension direction of electrode fingers, which excite an acoustic wave, within an overlap region of the IDT in which the electrode fingers overlap, a width of at least one of the electrode fingers in the second region being greater than that in the first region, one or some resonators of the parallel resonator and the series resonator having a larger number of the second regions than a remaining resonator; and a second filter connected between the common terminal and a second terminal and having a passband higher than a passband of the first filter.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: November 19, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Hidetaro Nakazawa, Masafumi Iwaki, Takashi Matsuda
  • Patent number: 10461718
    Abstract: An acoustic wave resonator includes: a piezoelectric substrate; and an IDT that is located on the piezoelectric substrate and includes first regions and second regions alternately arranged in an extension direction of electrode fingers, which excite an acoustic wave, in an overlap region in which the electrode fingers overlap, at least one electrode finger of the electrode fingers in the second regions having a different width from the at least one electrode finger in the first regions, a width of an outer second region of the second regions in the extension direction differs from a width of an inner second region of the second regions.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 29, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Hidetaro Nakazawa, Masafumi Iwaki, Tabito Tanaka, Takashi Matsuda
  • Patent number: 10359669
    Abstract: A display apparatus according to one embodiment of the present disclosure comprises a display panel, a light guiding plate that emits light, the light being derived from a light source, through a front surface of the light guiding plate toward a rear surface of the display panel, a spacer that forms a void between the display panel and the light guiding plate, and an optical sheet disposed at the void, the optical sheet having a surface to face the rear surface of the display panel and a surface to face the front surface of the light guiding plate. In the display apparatus, the spacer is formed using a shape memory alloy.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: July 23, 2019
    Assignee: Sakai Display Products Corporation
    Inventors: Takashi Iwaki, Nobuhiro Yonezawa, Daishi Ishikawa
  • Patent number: 10361678
    Abstract: An acoustic wave resonator includes: a piezoelectric substrate; and an IDT located on the piezoelectric substrate and including a pair of comb-shaped electrodes facing each other, each of the pair of comb-shaped electrodes including a grating electrode exciting an acoustic wave and a bus bar to which the grating electrode is connected, wherein an anisotropy coefficient in a cross region where the grating electrodes of the pair of comb-shaped electrodes cross each other is positive; an anisotropy coefficient in a gap region located between a tip of the grating electrode of one of the pair of comb-shaped electrodes and the bus bar of the other is less than the anisotropy coefficient in the cross region, and an acoustic velocity of an acoustic wave propagating through the gap region is equal to or less than an acoustic velocity of an acoustic wave propagating through the cross region at an antiresonant frequency.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: July 23, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Masafumi Iwaki, Yoshio Satoh, Tabito Tanaka, Hidetaro Nakazawa, Takashi Matsuda, Jun Tsutsumi
  • Publication number: 20190222195
    Abstract: An acoustic wave resonator includes: a piezoelectric substrate; and an IDT that is located on the piezoelectric substrate and includes comb-shaped electrodes facing each other, each of the comb-shaped electrodes having grating electrode and a bus bar connected to the grating electrodes, a duty ratio of grating electrodes of the comb-shaped electrodes in a center region of an overlap region differing from a duty ratio of grating electrodes of the comb-shaped electrodes in an edge region of the overlap region in an arrangement direction of the grating electrodes, the grating electrodes of each of the comb-shaped electrodes overlapping with the grating electrodes of the other in the overlap region, a grating electrode of a first one of the comb-shaped electrodes in the center region having a different width from a grating electrode of a second one of the comb-shaped electrodes in the center region.
    Type: Application
    Filed: October 30, 2018
    Publication date: July 18, 2019
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Takashi MATSUDA, Masafumi IWAKI
  • Patent number: 10355668
    Abstract: An acoustic wave device includes: a Y-cut X-propagation lithium tantalate substrate having a cut angle of 20° or more and 48° or less; and a grating electrode that is composed of one or more metal films laminated on the substrate, and excites an acoustic wave, wherein when a density of each metal film in the one or more metal films is represented by ?i, a Poisson's ratio of each metal film is represented by Pi, a film thickness of each metal film is represented by hi, a density of Cu is represented by ?0, a Poisson's ratio of Cu is represented by P0 and a pitch is represented by ?, a total value of “(hi/?)×(?i/?0)×(Pi/P0)” for each metal film with respect to the one or more metal films is more than 0.08.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: July 16, 2019
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Masafumi Iwaki, Yoshio Sato, Tabito Tanaka, Hidetaro Nakazawa, Takashi Matsuda, Jun Tsutsumi
  • Publication number: 20190207583
    Abstract: An acoustic wave device includes: a piezoelectric substrate; and a pair of comb-shaped electrodes that is located on the piezoelectric substrate, includes a metal film, and excites a surface acoustic wave, the metal film being mainly composed of a metal having a melting point equal to or higher than a melting point of Pt, the metal film having a first region in which a crystal grain has a columnar shape and a second region that is located on and/or under the first region in a stacking direction and has less crystallinity than the first region or has an amorphous structure.
    Type: Application
    Filed: November 21, 2018
    Publication date: July 4, 2019
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Shinpei MIURA, Satoshi IMASU, Takashi MATSUDA, Masafumi IWAKI
  • Patent number: 10191211
    Abstract: A display apparatus comprises: a display panel which displays an image on one surface thereof, a light guide plate disposed to face the other surface of the display panel; a plurality of optical sheets interposed between the display panel and the light guide plate; and a spacer which is sandwiched between the display panel and the light guide plate to secure a space for interposing the optical sheets therebetween, wherein the spacer has a space holding layer fixed to the light guide plate and securing the space, and a fixed layer sandwiched between the display panel and the space holding layer and fixed to the display panel, wherein the thickness of the space holding layer is thicker than a total of the thicknesses of the plurality of optical sheets except for an optical sheet nearest to the display panel.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: January 29, 2019
    Assignee: Sakai Display Products Corporation
    Inventors: Nobuhiro Yonezawa, Takashi Iwaki
  • Publication number: 20180039015
    Abstract: A display apparatus comprises: a display panel which displays an image on one surface thereof, a light guide plate disposed to face the other surface of the display panel; a plurality of optical sheets interposed between the display panel and the light guide plate; and a spacer which is sandwiched between the display panel and the light guide plate to secure a space for interposing the optical sheets therebetween, wherein the spacer has a space holding layer fixed to the light guide plate and securing the space, and a fixed layer sandwiched between the display panel and the space holding layer and fixed to the display panel, wherein the thickness of the space holding layer is thicker than a total of the thicknesses of the plurality of optical sheets except for an optical sheet nearest to the display panel.
    Type: Application
    Filed: March 2, 2015
    Publication date: February 8, 2018
    Inventors: Nobuhiro Yonezawa, Takashi Iwaki
  • Publication number: 20170205654
    Abstract: A display apparatus according to one embodiment of the present disclosure comprises a display panel, a light guiding plate that emits light, the light being derived from a light source, through a front surface of the light guiding plate toward a rear surface of the display panel, a spacer that forms a void between the display panel and the light guiding plate, and an optical sheet disposed at the void, the optical sheet having a surface to face the rear surface of the display panel and a surface to face the front surface of the light guiding plate. In the display apparatus, the spacer is formed using a shape memory alloy.
    Type: Application
    Filed: September 26, 2014
    Publication date: July 20, 2017
    Inventors: Takashi Iwaki, Nobuhiro Yonezawa, Daishi Ishikawa
  • Patent number: 9557734
    Abstract: A control computer as a master apparatus in a control network system includes a packet generation unit. The packet generation unit: selects a control command for writing a data from among packet generation information; references the packet generation information for each of the selected control command; and includes a data for write which is read from an address in a storage section corresponding to the each control command, in a control packet to generate the control packet. A communication unit transmits the generated control packet to a controlled object as a slave device.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: January 31, 2017
    Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    Inventors: Tatsuya Maruyama, Tsutomu Yamada, Shinji Yonemoto, Takashi Iwaki, Hironori Ohashi, Yutaka Matsumoto, Ichiro Takahashi
  • Patent number: 9379763
    Abstract: Provided is a wireless device and a wireless network capable of readily communicating wirelessly using different frequency bands and wireless formats to match the state of wireless communication at the installation location of the facility being monitored. A wireless device for performing wireless communication using a wireless module suited to the state of communication, the wireless device being provided with a plurality of wireless modules on a base substrate, wherein the wireless modules are a plurality of wireless modules between which the frequency and/or the wireless format differ. The wireless device is characterized in being provided with: a device controller for selecting a wireless module suited to the state of communication, the device controller being detachably mounted on the base substrate and connected to the plurality of wireless modules by signal wires; and a terminal block for external connection and a communication interface, which are connected to the device controller.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: June 28, 2016
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hajime Kihara, Norihisa Yanagihara, Takashi Iwaki, Takayoshi Fujioka
  • Patent number: 9176271
    Abstract: A light guide plate that uses a resin film as a material for the light guide plate, that has a reflecting or scattering pattern formed by printing, and that guides a light propagating in the film to exit and emerge from the front surface thereof. The light guide plate is thinner and highly flexible, and has high reliability and durability. A base material of the light guide plate is formed from a thermosetting polyurethane sheet with a thickness of 0.4 mm or less. When a dot pattern is formed by ink-jetting, a white UV curable ink, for which the thermosetting polyurethane exhibits a swellability such that the thermosetting polyurethane increases by 10% or more in weight as a result of being soaked in the ink for one hour at a room temperature, is used as the ink.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: November 3, 2015
    Assignee: NIPPON MEKTRON, LTD.
    Inventors: Kazuyuki Ozaki, Yasushi Katsuta, Takashi Iwaki, Hayato Takada
  • Patent number: 9148297
    Abstract: An information processor capable of ensuring time synchronization accuracy, ensuring EtherCAT command consistency, and easily developing the software based on a 2-port configuration even when a communication path error occurs includes: an arithmetic section; at least two communication sections each including a transmission section and a reception section; and a redundant communication control section that controls a communication path between the arithmetic section and the communication section. The redundant communication control section includes: a communication path state determination section that determines a network path state; and a redundant path switching section that switches connection between the arithmetic section and at least two communication sections.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: September 29, 2015
    Assignee: HITACHI, LTD.
    Inventors: Tatsuya Maruyama, Tsutomu Yamada, Norihisa Yanagihara, Shinji Yonemoto, Takashi Iwaki, Hironori Ohashi, Yutaka Matsumoto
  • Patent number: 8913514
    Abstract: A communication control unit and a communication control system are provided in which control devices can synchronously operate. In a communication control system in which a communication control unit and multiple control devices having an actuator to operate a control target are connected via a network, the communication control unit provides a control command to the control devices, synchronizes times of the communication control unit and the control devices, obtains communication delays relative to the control devices, collects control start times of the control devices, obtains a time by subtracting the control start time from a predetermined time as a start time of the control device, calculates a time obtained by subtracting the communication delay from the start time for each control device, and transmits the control command to the control devices before the earliest time of the calculated times.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: December 16, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuya Maruyama, Tsutomu Yamada, Shinji Yonemoto, Takashi Iwaki, Hironori Ohashi, Yutaka Matsumoto
  • Patent number: 8788735
    Abstract: An interrupt control unit provides controls on an interrupt from an accelerator to a CPU based on a packet transmitted to or received from a controlled object. The interrupt control unit includes: a storage part for storing therein an interrupt control timing table in which a condition of switching a mode of the interrupt control is described; and an interrupt control mode switching part for switching the mode of the interrupt control to the CPU between a permission mode and a mask mode, based on the interrupt control timing table in the storage part.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: July 22, 2014
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Tatsuya Maruyama, Tsutomu Yamada, Norihisa Yanagihara, Shinji Yonemoto, Takashi Iwaki, Hiroshi Fujii