Patents by Inventor Kenji Okishiro

Kenji Okishiro 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: 20230302562
    Abstract: A copper-ceramic joint body having high joint strength is provided. The copper-ceramic joint body includes: a copper member made of Cu or Cu alloy; a ceramic member joined to the copper member and made of nitride of Si or Al; and a joint layer formed on joint surfaces of the copper member and the ceramic member, and containing Cu and Mg and further containing at least one type of active metal elements selected from a group of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Ca, Y, Ce, La, Sm, Yb, Nd, Gd and Er, and shear strength of the joint layer is equal to or higher than 10 MPa.
    Type: Application
    Filed: March 23, 2023
    Publication date: September 28, 2023
    Inventors: Takashi NOGAWA, Shun TAKANO, Kenji OKISHIRO, Atsushi OKAMOTO
  • Patent number: 10424428
    Abstract: An object is to provide a super-conducting coil and a magnetic resonance imaging device that are quench-free by reducing Joule heat generated upon occurrence of separation of members even in a high magnetic field. The super-conducting coil in accordance with the present invention includes a spool and a super-conducting wire wound around the spool. The coil further includes, between the spool and the super-conducting wire, a first resin layer containing thermoplastic resin, a second resin layer containing thermosetting resin, and a mixed layer, the mixed layer being positioned between the first resin layer and the second resin layer and containing a mixture of the thermoplastic resin and the thermosetting resin.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: September 24, 2019
    Assignee: HITACHI, LTD.
    Inventors: Masahiro Kawasaki, Kenji Okishiro, Tadashi Arai, Akihisa Miyazoe
  • Publication number: 20170092397
    Abstract: An object is to provide a super-conducting coil and a magnetic resonance imaging device that are quench-free by reducing Joule heat generated upon occurrence of separation of members even in a high magnetic field. The super-conducting coil in accordance with the present invention includes a spool and a super-conducting wire wound around the spool. The coil further includes, between the spool and the super-conducting wire, a first resin layer containing thermoplastic resin, a second resin layer containing thermosetting resin, and a mixed layer, the mixed layer being positioned between the first resin layer and the second resin layer and containing a mixture of the thermoplastic resin and the thermosetting resin.
    Type: Application
    Filed: June 17, 2015
    Publication date: March 30, 2017
    Applicant: HITACHI, LTD.
    Inventors: Masahiro KAWASAKI, Kenji OKISHIRO, Tadashi ARAI, Akihisa MIYAZOE
  • Publication number: 20150060367
    Abstract: The present invention provides a coagulation processing method capable of adding a sufficiently-dissolved coagulant aqueous solution to being processed water and materializing high-efficiency coagulation processing, a coagulation processing unit, and a water processing apparatus. A coagulation processing unit includes a coagulant aqueous solution storage tank 1 to have a stirrer 5 and store a coagulant aqueous solution, a particle size distribution measurement device 50 to measure the particle size distribution of the coagulant aqueous solution in the coagulant aqueous solution storage tank 1, a coagulation tank 11 to mix being processed water with an added coagulant aqueous solution and form a coagulation, a coagulation removing section 9 to remove the coagulation from the being processed water containing the coagulation, and a control section 6 to control the stirrer 5 so that a median size in the particle size distribution of the coagulant aqueous solution may be not more than 1.
    Type: Application
    Filed: July 31, 2014
    Publication date: March 5, 2015
    Inventors: Satoshi ISHII, Kenji OKISHIRO, Hiroshi SASAKI
  • Publication number: 20150053621
    Abstract: Provided are a method for treating water and a flocculant used in the method. The method includes the steps of adding a first polymer compound formed by multiply binding a first repeating unit into water to be treated, and adding a second polymer compound formed by multiply binding a second repeating unit into the water. The first repeating unit includes a first linked main chain which constructs a main chain via repeatedly bound one another, and an adsorption site directly or indirectly bound to the first linked main chain so as to adsorb organic compounds contained in the water to be treated. The second repeating unit has a similar structure to the first repeating unit except that the number of carbon atoms in the second linked main chain is different from that in the first linked main chain. The flocculant includes the first and second polymer compounds.
    Type: Application
    Filed: August 19, 2014
    Publication date: February 26, 2015
    Applicant: Hitachi, Ltd.
    Inventors: Kenji OKISHIRO, Satoshi ISHII, Hiroshi SASAKI
  • Patent number: 8633950
    Abstract: An image display device for special uses which improves a color resolution of a particular color and increases a color reproducibility is provided. In the image display device, an area in which a gradient is gentle is provided to a partial region of a gamma curve denoted by a relationship of an input value (gray level) and an output value (luminance relative value) so that chromaticity points on chromaticity coordinates are unevenly distributed, thereby improving a chromatic resolving power (color resolution) of a particular color. In this manner, the color reproducibility of special monitors which display images of a particular color range represented by a monitor for remote metical care and a monitor for surgical operation can be improved.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: January 21, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Okishiro, Toshiaki Kusunoki, Kenichi Yamamoto
  • Patent number: 8183758
    Abstract: An object of the present invention is to provide a moving picture displayable liquid crystal display device capable of attaining satisfactory moving picture characteristics, color reproducibility and reliability at the same time.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: May 22, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kenji Okishiro, Shin Imamura, Masatoshi Shiiki
  • Patent number: 7994717
    Abstract: A high-luminance plasma display panel has a plurality of discharge cells including a phosphor film emitting visible rays by excitation caused by ultraviolet light generated by the discharge of a discharge gas. The phosphor film has at least two layers of a phosphor layer and a reflecting layer, and the phosphor layer is arranged closer to the discharge space side than the reflecting layer. A film thickness Wt of the phosphor film is 40 ?m or less, and a film thickness Wp of the phosphor layer, a particle diameter dp of a phosphor that is at least a part of components of the phosphor layer, a film thickness Wr of the reflecting layer, and a particle diameter dr of a reflecting material that is at least a part of components of the reflecting layer satisfy 2dp?Wp?5dp and 2dr?Wr?Wt?Wp.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: August 9, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Okishiro, Keizo Suzuki, Tatsuya Miyake, Choichiro Okazaki
  • Patent number: 7977880
    Abstract: A plasma display panel is provided with a discharge cell comprising a discharge space, a phosphor film contacting with the discharge space, a holding portion (barrier ribs and a dielectric layer) sectioning the discharge space and holding the phosphor film on an opposite side to the discharge space side, and gas filled in the discharge space and emitting ultraviolet light by discharge. The phosphor film comprises a phosphor layer emitting visible rays by excitation caused by ultraviolet light and a reflecting layer reflecting visible rays, the phosphor layer is provided between the reflecting layer and the discharge space, a film thickness of the reflecting layer is 15 ?m or thinner, and a refractive index of the reflecting layer is 1.7 or higher.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: July 12, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Naohiro Horiuchi, Kenji Okishiro, Go Saitou
  • Publication number: 20110134160
    Abstract: An image display device for special uses which improves a color resolution of a particular color and increases a color reproducibility is provided. In the image display device, an area in which a gradient is gentle is provided to a partial region of a gamma curve denoted by a relationship of an input value (gray level) and an output value (luminance relative value) so that chromaticity points on chromaticity coordinates are unevenly distributed, thereby improving a chromatic resolving power (color resolution) of a particular color. In this manner, the color reproducibility of special monitors which display images of a particular color range represented by a monitor for remote medical care and a monitor for surgical operation can be improved.
    Type: Application
    Filed: December 7, 2010
    Publication date: June 9, 2011
    Applicant: HITACHI, LTD.
    Inventors: Kenji OKISHIRO, Toshiaki KUSUNOKI, Kenichi YAMAMOTO
  • Patent number: 7940354
    Abstract: A liquid crystal display device by the use of such a high quality light source in order to suppress brightness distribution and chromaticity distribution of a light source. The liquid crystal display device comprises a white light source provided with a blue phosphor that emits blue light, a green phosphor that emits green light, and a red phosphor that emits red light and a liquid crystal display panel having color filters to adjust the amount of transmitted light from the white light source for every pixel and transmit any one of blue, green, and red lights for every pixel, where the red phosphor to be used is represented by a composition formula (Y1-x-y,Gdx,Euy)2O3. At this time, it is desirable that the conditions of 0.45?x?0.85 and 0.025?y?0.040 respectively are satisfied.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: May 10, 2011
    Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.
    Inventors: Kenji Okishiro, Masatoshi Shiiki
  • Patent number: 7916115
    Abstract: A liquid crystal display including a blink backlight system light source and a liquid crystal panel for adjusting the amount of light transmitted from the light source. The light source is made of a plurality of light emitting tubes each having one or more kinds of phosphors, and having a turned-on state and a turned-off state within one frame. A luminance factor area of light from each of the phosphors is substantially equal to that of light from any other phosphor in at least one of a luminance rise time when the light source changes from the turned-off state to the turned-on state and a luminance fall time when the light source changes from the turned-on state to the turned-off state.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: March 29, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Kenji Okishiro, Yoshinori Aono, Masaaki Komatsu, Masatoshi Shiiki
  • Publication number: 20100090582
    Abstract: A high-luminance plasma display panel has at least has a plurality of discharge cells including a phosphor film emitting visible rays by excitation caused by ultraviolet light generated by the discharge of a discharge gas. The phosphor film has at least two layers of a phosphor layer and a reflecting layer, and the phosphor layer is arranged closer to the discharge space side than the reflecting layer. A film thickness Wt of the phosphor film is 40 ?m or less, and a film thickness Wp of the phosphor layer, a particle diameter dp of a phosphor that is at least a part of components of the phosphor layer, a film thickness Wr of the reflecting layer, and a particle diameter dr of a reflecting material that is at least a part of components of the reflecting layer satisfy 2dp?Wp?5dp and 2dr?Wr?Wt?Wp.
    Type: Application
    Filed: December 12, 2006
    Publication date: April 15, 2010
    Applicant: HITACHI, LTD.
    Inventors: Kenji Okishiro, Keizo Suzuki, Tatsuya Miyake, Choichiro Okazaki
  • Publication number: 20090153049
    Abstract: A plasma display panel is provided with a discharge cell comprising a discharge space, a phosphor film contacting with the discharge space, a holding portion (barrier ribs and a dielectric layer) sectioning the discharge space and holding the phosphor film on an opposite side to the discharge space side, and gas filled in the discharge space and emitting ultraviolet light by discharge. The phosphor film comprises a phosphor layer emitting visible rays by excitation caused by ultraviolet light and a reflecting layer reflecting visible rays, the phosphor layer is provided between the reflecting layer and the discharge space, a film thickness of the reflecting layer is 15 ?m or thinner, and a refractive index of the reflecting layer is 1.7 or higher.
    Type: Application
    Filed: August 15, 2008
    Publication date: June 18, 2009
    Inventors: Naohiro Horiuchi, Kenji Okishiro, Go Saitou
  • Patent number: 7466375
    Abstract: A liquid crystal display device includes a light source and a liquid crystal display panel. The light source includes a blue-emitting phosphor configured to emit blue light, a green-emitting phosphor configured to emit green light, and a red-emitting phosphor configured to emit red light. The liquid crystal display panel includes color filters configured to control the transmittance of light from the light source and transmit one of blue, green, and red light on a pixel basis. The green-emitting phosphor is represented by a compositional formula of (La1?x?y,Tbx,Cey)PO4, wherein “x” and “y” are compositional ratios satisfying both the following conditions: 0.500<(x+y)<0.700 and 1.20<(y/x)<2.00. The compositional ratios “x” and “y” preferably satisfy the following conditions: 0.50<(x+y)<0.65 and 1.50<(y/x)<1.70.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: December 16, 2008
    Assignee: Hitachi Displays, Ltd.
    Inventors: Kenji Okishiro, Masatoshi Shiiki
  • Publication number: 20080218664
    Abstract: In conventional fluorescent lamps and imaging devices using the same, there have been challenges that lighting efficiency should be enhanced and variation in emission colors should be reduced. The present invention has solved these challenges by providing a novel fluorescent lamp. The phosphor layers of the fluorescent lamp is composed of at least two types of phosphors, in which at least the most outer surface is a phosphor layer made of one of the phosphors (the first phosphor); and the rest portion of the phosphor layers, is made of mixed phosphors including a plurality of phosphors having respective emitting colors.
    Type: Application
    Filed: February 20, 2008
    Publication date: September 11, 2008
    Inventors: Shin IMAMURA, Kenji Okishiro, Masaki Nishikawa
  • Publication number: 20070121032
    Abstract: A liquid crystal display device includes a light source and a liquid crystal display panel. The light source includes a blue-emitting phosphor configured to emit blue light, a green-emitting phosphor configured to emit green light, and a red-emitting phosphor configured to emit red light. The liquid crystal display panel includes color filters configured to control the transmittance of light from the light source and transmit one of blue, green, and red light on a pixel basis. The green-emitting phosphor is represented by a compositional formula of (La1?x?y,Tbx,Cey)PO4, wherein “x” and “y” are compositional ratios satisfying both the following conditions: 0.500<(x+y)<0.700 and 1.20<(y/x)<2.00. The compositional ratios “x” and “y” preferably satisfy the following conditions: 0.50<(x+y)<0.65 and 1.50<(y/x)<1.
    Type: Application
    Filed: November 22, 2006
    Publication date: May 31, 2007
    Inventors: Kenji Okishiro, Masatoshi Shiiki
  • Publication number: 20060208998
    Abstract: A liquid crystal display including a blink backlight system light source and a liquid crystal panel for adjusting the amount of light transmitted from the light source. The light source is made of a plurality of light emitting tubes each having one or more kinds of phosphors, and having a turned-on state and a turned-off state within one frame. A luminance factor area of light from each of the phosphors is substantially equal to that of light from any other phosphor in at least one of a luminance rise time when the light source changes from the turned-off state to the turned-on state and a luminance fall time when the light source changes from the turned-on state to the turned-off state.
    Type: Application
    Filed: December 16, 2002
    Publication date: September 21, 2006
    Inventors: Kenji Okishiro, Yoshinori Aono, Masaaki Komatsu, Masatoshi Shiiki
  • Publication number: 20060170325
    Abstract: A liquid crystal display device by the use of such a high quality light source in order to suppress brightness distribution and chromaticity distribution of a light source. The liquid crystal display device comprises a white light source provided with a blue phosphor that emits blue light, a green phosphor that emits green light, and a red phosphor that emits red light and a liquid crystal display panel having color filters to adjust the amount of transmitted light from the white light source for every pixel and transmit any one of blue, green, and red lights for every pixel, where the red phosphor to be used is represented by a composition formula (Y1-x-y,Gdx,Euy)2O3. At this time, it is desirable that the conditions of 0.45?x?0.85 and 0.025?y?0.040 respectively are satisfied.
    Type: Application
    Filed: January 27, 2006
    Publication date: August 3, 2006
    Inventors: Kenji Okishiro, Masatoshi Shiiki
  • Patent number: 7027023
    Abstract: To provide a high-quality liquid crystal display device that does not produce image sticking and that can realize high response speed, a third electrode is provided that is different from a common electrode or a pixel electrode, and a voltage applied to the third electrode is varied within one frame period to drive a liquid crystal using a strong electric field and a uniform horizontal electric field in an initial stage within one frame period, while driving the liquid crystal only with the uniform horizontal electric field in a latter stage within one frame period.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: April 11, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Okishiro, Hitoshi Oaku, Ikuo Hiyama, Katsumi Kondou