Patents by Inventor Takeshi Nakao

Takeshi Nakao 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).

  • Publication number: 20220321091
    Abstract: An acoustic wave device includes a support, a piezoelectric layer on the support, a functional electrode at the piezoelectric layer, a frame-shaped support frame on the piezoelectric layer and surrounding the functional electrode in plan view in a stacking direction of the support and the piezoelectric layer, and a lid covering an opening of the support frame, wherein the support includes a first cavity overlapping at least a portion of the functional electrode in the plan view, a second cavity defined by the piezoelectric layer, the support frame, and the lid between the piezoelectric layer and the lid, the piezoelectric layer includes a through hole communicating with the first and second cavities, and a gas is provided in the first and second cavities.
    Type: Application
    Filed: March 29, 2022
    Publication date: October 6, 2022
    Inventors: Hisashi YAMAZAKI, Seiji KAI, Takeshi NAKAO
  • Publication number: 20220321097
    Abstract: An acoustic wave device includes a support including a support substrate, a piezoelectric layer on the support, a functional electrode at the piezoelectric layer, a frame-shaped support frame on the piezoelectric layer and surrounding the functional electrode in a plan view in a stacking direction of the support and the piezoelectric layer, and a lid covering an opening of the support frame, wherein the support includes a first cavity at a position overlapping at least a portion of the functional electrode in the plan view, a second cavity defined by the piezoelectric layer, the support frame, and the lid between the piezoelectric layer and the lid, the piezoelectric layer includes a through hole communicating with the first and second cavities, and the first and second cavities are under vacuum.
    Type: Application
    Filed: March 29, 2022
    Publication date: October 6, 2022
    Inventors: Hisashi YAMAZAKI, Seiji KAI, Takeshi NAKAO
  • Patent number: 11441449
    Abstract: A securing tool for a heat retention block covering a turbine casing main body includes: a securing rod, one end of which has an engaging portion with a protrusion; and a socket. The socket includes a guide groove, into which the protrusion of the securing rod is inserted, and a recessed groove. The guide groove includes a first guide groove, which extends in the socket axis direction from a starting end to a terminal end, and a second guide groove, the starting end of which is connected to the terminal end, and which extends from the starting end to a terminal end in a circumferential direction relative to the socket axis. The second guide groove is connected to the recessed groove.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: September 13, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hyota Abe, Yuji Kurokawa, Takuya Izumi, Takeshi Nakao, Keisuke Ide, Osamu Koga
  • Publication number: 20220029599
    Abstract: An acoustic wave device includes a support substrate including silicon, a piezoelectric layer in which a rotated Y-cut X-propagation lithium tantalate is included, and an IDT electrode. A film thickness of the piezoelectric layer is less than or equal to about 1?. When ?111 is an angle between a directional vector k111, and a direction of silicon and n is an arbitrary integer, the angle ?111 is in a range of about 0°+120°×n??111?45°+120°×n or in a range of about 75°+120°×n??111?120°+120°×n when the IDT electrode is on a positive surface of the piezoelectric layer and the angle ?111 is in a range of about 15°+120°×n??111?105°+120°×n when the IDT electrode is on the negative surface of the piezoelectric layer.
    Type: Application
    Filed: October 4, 2021
    Publication date: January 27, 2022
    Inventors: Hideki IWAMOTO, Akira MICHIGAMI, Tsutomu TAKAI, Takeshi NAKAO
  • Publication number: 20210408994
    Abstract: An acoustic wave device includes a support substrate, a piezoelectric film, a functional electrode, and a support. The support substrate includes a cavity. The piezoelectric film is provided on the support substrate to cover the cavity. The functional electrode is provided on the piezoelectric film to overlap the cavity when viewed in a plan view. The support is in the cavity of the support substrate to support the piezoelectric film. The functional electrode includes electrodes arranged in a direction crossing the thickness direction of the piezoelectric film. The electrodes include a first electrode and a second electrode. The first electrode and the second electrode oppose each other in a direction crossing the thickness direction of the piezoelectric film and are connected to different potentials. Adjacent ones of the electrodes overlap each other in a direction orthogonal to a longitudinal direction of the first electrode.
    Type: Application
    Filed: September 10, 2021
    Publication date: December 30, 2021
    Inventors: Shou NAGATOMO, Hideki IWAMOTO, Takeshi NAKAO
  • Publication number: 20210277798
    Abstract: A securing tool for a heat retention block covering a turbine casing main body includes: a securing rod, one end of which has an engaging portion with a protrusion; and a socket. The socket includes a guide groove, into which the protrusion of the securing rod is inserted, and a recessed groove. The guide groove includes a first guide groove, which extends in the socket axis direction from a starting end to a terminal end, and a second guide groove, the starting end of which is connected to the terminal end, and which extends from the starting end to a terminal end in a circumferential direction relative to the socket axis. The second guide groove is connected to the recessed groove.
    Type: Application
    Filed: May 11, 2018
    Publication date: September 9, 2021
    Inventors: Hyota ABE, Yuji KUROKAWA, Takuya IZUMI, Takeshi NAKAO, Keisuke IDE, Osamu KOGA
  • Patent number: 9210388
    Abstract: In a laser source module aligning laser beams from laser sources for three colors, red, green, and blue on a single combined beam optical axis, decreasing relative displacements of beam spots of three colors, occurring due to thermal deformation by temperature rise, is achieved by a laser source module including plural laser sources, each incorporating a laser having a laser chip installed on a heat sink and a lens converting a light radiated from the laser into a laser beam, and a beam combining unit aligning the laser beams from the laser sources on a single combined beam optical axis, wherein the lasers in at least two or more ones of the laser sources are arranged so that their laser beams will be decentered toward a same direction on the combined beam optical axis upon displacement of an emission point of the laser chip away from the heat sink.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: December 8, 2015
    Assignee: HITACHI-LG DATA STORAGE, INC.
    Inventors: Atsushi Kazama, Takeshi Nakao, Yasuo Amano
  • Patent number: 9196818
    Abstract: A boundary acoustic wave device includes an LiTaO3 piezoelectric substrate, a first dielectric medium layer disposed on the piezoelectric substrate, a second dielectric medium layer disposed on the first medium layer and having a sound velocity different from the first medium layer, and an interdigital electrode disposed at the boundary between the piezoelectric substrate and the first medium layer. The sound velocity of the first medium layer is less than the sound velocity of LiTaO3. The sound velocity of the second medium layer is greater than the sound velocity of LiTaO3. The inequality (h/?)×a?0.05 is satisfied, where H is the thickness of the first medium layer, h is the thickness of the interdigital electrode, ? is the period of electrode fingers of the interdigital electrode, and a is the ratio of the density of a metal of the interdigital electrode to the density of Au.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: November 24, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takashi Yamane, Takeshi Nakao
  • Patent number: 9036233
    Abstract: A laser light source module includes a housing and a heat sink that is thermally connected to the housing. The housing includes a laser element that emits laser light, a laser holder that is made of metal to hold the laser element, a laser light receiving element that receives laser beam from the laser element, a mirror element that reflects the laser light to scan a screen, an optical element that is disposed on the optical axis of the laser light. The laser holder is thermally connected to the housing with a thermally conductive member. A protrusion is formed on the thermally conductive member. The protrusion and the springiness of the thermally conductive member are used to press the laser holder against the housing in the same direction as the direction of laser light emission.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: May 19, 2015
    Assignee: HITACHI-LG DATA STORAGE, INC.
    Inventors: Wataru Sato, Takeshi Nakao
  • Patent number: 8810104
    Abstract: A surface acoustic wave device includes a piezoelectric substrate, at least one interdigital transducer (IDT) electrode provided on the piezoelectric substrate, and an insulator layer to improve a temperature characteristic arranged so as to cover the IDT electrode. When a surface of the insulator layer is classified into a first surface region under which the IDT electrode is positioned and a second surface region under which no IDT electrode is positioned, the surface of the insulator layer in at least one portion of the second surface region is higher than the surface of the insulator layer from the piezoelectric substrate in at least one portion of the first surface region by at least about 0.001?, where the wavelength of an acoustic wave is ?.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: August 19, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Shunsuke Kido, Takeshi Nakao, Yasuharu Nakai, Kenji Nishiyama, Michio Kadota
  • Patent number: 8693075
    Abstract: Optical beams emitted by optical sources are incident on a mirror surface of a scan mirror in a substantially vertical direction and reflected in a substantially vertical direction by the scan mirror. The mirror surface of the scan mirror is driven to repeatedly rotate two-dimensionally by a predetermined scan angle by a scan mirror drive circuit. A polarized beam splitter causes the optical beam emitted by the optical source to be incident on the scan mirror through a quarter wave plate, and outputs the optical beam that has been reflected by the scan mirror and passed through the quarter wave plate toward the screen. A scan angle expander is arranged on the output side of the polarized beam splitter, whereby the scan angle of the optical beam is increased by N times.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: April 8, 2014
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventors: Takeshi Nakao, Kunikazu Ohnishi, Hiromi Kita, Norio Hosaka
  • Patent number: 8677582
    Abstract: A method for fabricating an acoustic wave device includes the steps of forming an insulating material layer on a piezoelectric substrate, forming a patterned photoresist on the insulating material layer, patterning the insulating material layer, and forming a piezoelectric-substrate exposed depression corresponding to a region where an interdigital transducer electrode is to be formed on a first insulator layer composed of the insulating material layer, depositing a metallic material on the piezoelectric substrate to form the interdigital transducer electrode in the piezoelectric-substrate exposed depression such that the overall interdigital transducer electrode is thinner than the first insulator layer and coating the photoresist with a metallic material, removing the photoresist and the metallic material on the photoresist, and depositing a second insulator layer so as to cover the interdigital transducer electrode and the first insulator layer.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: March 25, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Shunsuke Kido, Takeshi Nakao, Yasuharu Nakai, Kenji Nishiyama, Michio Kadota
  • Patent number: 8436510
    Abstract: A boundary acoustic wave device includes a piezoelectric substrate made of single-crystalline LiTaO3, a first medium layer disposed on the piezoelectric substrate and made of a dielectric, a second medium layer disposed on the first medium layer and made of a dielectric having a sound velocity different from that of the first medium layer, and at least one interdigital electrode disposed at the boundary between the piezoelectric substrate and the first medium layer. The sound velocity of the first medium layer is less than the sound velocity of LiTaO3. The sound velocity of the second medium layer is greater than the sound velocity of LiTaO3. The inequality (h/?)×a?0.05 is satisfied, where H is the thickness of the first medium layer, h is the thickness of the interdigital electrode, ? is the period of electrode fingers of the interdigital electrode, and a is the ratio of the density of a metal of the interdigital electrode to the density of Au.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: May 7, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Takashi Yamane, Takeshi Nakao
  • Patent number: 8427032
    Abstract: A surface acoustic wave device prevents a decrease in yield and a decrease in reliability, such as an impulse withstand voltage, and achieves good frequency characteristics, even when using higher frequencies. The surface acoustic wave device includes an IDT electrode disposed on a piezoelectric substrate, and a first insulating film and at least one second insulating film disposed on the IDT electrode, and utilizes a higher-order mode of an SH wave, in which the acoustic velocity of a surface acoustic wave in the first insulating film located closer to the IDT electrode than the insulating film at an outermost surface is higher than the acoustic velocity of a surface acoustic wave in the second insulating film located at the outermost surface.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: April 23, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kenji Nishiyama, Takeshi Nakao, Michio Kadota
  • Publication number: 20130076800
    Abstract: In a light beam scanning projection apparatus which scans a light beam emitted from a laser light source, an image display apparatus is configured including a plurality of light beams, a reflection mirror for reflecting the light beams to project them onto a screen or the like, and a mirror driving unit for driving the reflection mirror so that the plurality of light beams are incident on the reflection mirror with different optical axes and projected on different projection areas, thereby displaying a single image with a plurality of images. Further, by forming a single image by causing a plurality of the light beams to have predetermined relative angles thereamong so as to make a plurality of images overlap on each other with slight shifts, a scanning projection apparatus is provided with which the luminance of the image is improved while conforming to safety standards.
    Type: Application
    Filed: July 19, 2012
    Publication date: March 28, 2013
    Inventors: Michio HATAGI, Takeshi Nakao, Tomoto Kawamura, Kunikazu Ohnishi, Hiromi Kita
  • Publication number: 20130070206
    Abstract: In a laser source module aligning laser beams from laser sources for three colors, red, green, and blue on a single combined beam optical axis, decreasing relative displacements of beam spots of three colors, occurring due to thermal deformation by temperature rise, is achieved by a laser source module including plural laser sources, each incorporating a laser having a laser chip installed on a heat sink and a lens converting a light radiated from the laser into a laser beam, and a beam combining unit aligning the laser beams from the laser sources on a single combined beam optical axis, wherein the lasers in at least two or more ones of the laser sources are arranged so that their laser beams will be decentered toward a same direction on the combined beam optical axis upon displacement of an emission point of the laser chip away from the heat sink.
    Type: Application
    Filed: March 26, 2012
    Publication date: March 21, 2013
    Applicant: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Atsushi KAZAMA, Takeshi NAKAO, Yasuo AMANO
  • Patent number: 8390400
    Abstract: An acoustic wave element includes an IDT electrode in contact with a piezoelectric material and including a plurality of electrode fingers, which include first and second electrode fingers that adjoin each other in an acoustic wave propagation direction and that connect to different potentials and a first dummy electrode finger facing the first electrode finger via a gap located on an outer side in an electrode finger length direction of the first electrode finger. At an area near the gap, first protrusions are provided in at least one of the first electrode finger and the first dummy electrode finger, the first protrusion protruding in the acoustic wave propagation direction from at least one of side edges of the at least one of the first electrode finger and the first dummy electrode finger. The acoustic wave element has greatly improved resonance characteristics of a resonance frequency and prevents short-circuit failure between electrode fingers and degradation in insulation properties.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: March 5, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hajime Kando, Shunsuke Kido, Takeshi Nakao, Daisuke Yamamoto
  • Publication number: 20130003022
    Abstract: A polarizing prism is shaped in the form of a hexahedron. A polarizing beam splitter film (PBS film) is arranged approximately in a diagonal direction of the hexahedron. The polarizing prism holds a relationship of A<B when the dimension thereof in an outgoing direction (Y direction) of a light beam to a screen is A and the dimension thereof in an incident direction (X direction) of a light beam from a light source is B. For example, the polarizing prism is shaped in the form of a rectangular parallelepiped. At a plane on which the light beam is launched from a scanning mirror, one end of the PBS film is placed so as to intersect with the incident plane at an angle of approximately 45° at a position deviated inside by a difference between the dimensions A and B from the end of the incident plane.
    Type: Application
    Filed: June 26, 2012
    Publication date: January 3, 2013
    Inventors: Teppei Tanaka, Takeshi Nakao, Masato Sugiyama, Michio Hatagi, Tomoto Kawamura, Hiromi Kita, Kunikazu Ohnishi
  • Publication number: 20120327373
    Abstract: The present invention provides a scan-type image display device. In the scan-type image display device, laser light sources respectively generate light beams of green, red and blue, which in turn are combined by dichroic mirrors to generate a first beam and a second beam. A deflecting mirror device two-dimensionally scans the first and second beams under the rotation of a deflecting mirror thereof. The outgoing directions of the first and second beams have an angular difference relative to the vertical direction of a screen, and an interval between the first and second laser beams is set to be larger than an aperture diameter defined by laser safety standards.
    Type: Application
    Filed: June 19, 2012
    Publication date: December 27, 2012
    Inventors: Norio HOSAKA, Eiji Tsubono, Takeshi Nakao, Fumio Haruna
  • Publication number: 20120275002
    Abstract: Optical beams emitted by optical sources are incident on a mirror surface of a scan mirror in a substantially vertical direction and reflected in a substantially vertical direction by the scan mirror. The mirror surface of the scan mirror is driven to repeatedly rotate two-dimensionally by a predetermined scan angle by a scan mirror drive circuit. A polarized beam splitter causes the optical beam emitted by the optical source to be incident on the scan mirror through a quarter wave plate, and outputs the optical beam that has been reflected by the scan mirror and passed through the quarter wave plate toward the screen. A scan angle expander is arranged on the output side of the polarized beam splitter, whereby the scan angle of the optical beam is increased by N times.
    Type: Application
    Filed: April 19, 2012
    Publication date: November 1, 2012
    Inventors: Takeshi NAKAO, Kunikazu Ohnishi, Hiromi Kita, Norio Hosaka