Patents by Inventor Eiichi KANAUMI

Eiichi KANAUMI 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: 11316082
    Abstract: A method of producing a wavelength converting member is provided. The method includes forming a quantum dot layer on a bottom organic layer, and forming a top organic layer on the quantum dot layer. The quantum dot layer includes quantum dots. A moisture vapor transmission rate of the top organic layer and the bottom organic layer is at least 0.006 g/(m2·day) and less than 9 g/(m2·day).
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: April 26, 2022
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Eiichi Kanaumi
  • Patent number: 11202581
    Abstract: To provide a blood flow sensor in which a fluctuation of measurement results is suppressed during measurement of the blood flow volume. A probe portion is provided with a sensor portion which has a laser diode generating laser light, a photodiode receiving light, and a sensor housing having a contact surface contacting a subject and which irradiates a subject with the laser light generated by the laser diode through the contact surface, receives reflected light from the subject in the photodiode, and outputs a signal relating to the received light amount, a holding portion holding the sensor housing so as to be movable in an up-and-down direction crossing the contact surface, and a coil spring absorbing and transmitting external force applied to the holding portion to the sensor portion.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: December 21, 2021
    Inventors: Eiichi Kanaumi, Hiroaki Ogino, Tomoyuki Ogawa
  • Patent number: 10948412
    Abstract: Particularly provided is a method and a system for screening nanoparticles which allow effective search of conditions for surface modification of nanoparticles and reduction in the time, the labor, and the amount of a sample required for the surface modification compared with conventional techniques. The method for screening nanoparticles includes the steps of: dividing a nanoparticle suspension for a respective plurality of containers provided in a containment receptacle; performing surface modification on nanoparticles under different conditions for the respective containers; preparing evaluation samples by adding a dispersion medium into each container and mixing the nanoparticles and the dispersion medium; and performing evaluation on the evaluation sample in each container by optical analysis.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: March 16, 2021
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, NS MATERIALS INC.
    Inventors: Hiroyuki Nakamura, Maki Saeki, Masanori Tanaka, Eiichi Kanaumi
  • Patent number: 10815425
    Abstract: A quantum dot has a property that, when subjected to a GC-MS qualitative analysis at 350° C., octadecene (ODE) is present while oleylamine (OLA) is absent. A light emitting apparatus has a fluorescent layer covering and disposed immediately above a light emitting side of a light emitting device. The fluorescent layer, which is disposed immediately above the light emitting device, is formed of a resin with quantum dots dispersed therein. Deteriorations of light emission intensities at respective RGB peak wavelengths of the light emitting device after light emission for 1000 hours at 85° C. are all within 30% of a light emission intensity of the light emitting device before the light emission. Black discoloration caused by the deteriorations of the light emission intensities at the respective RGB peak wavelengths of the light emitting device does not occur in the resin.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: October 27, 2020
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Eiichi Kanaumi, Yoshikazu Nageno
  • Patent number: 10676667
    Abstract: To provide a quantum dot and manufacturing method of the dot particularly capable of reducing organic residues adhering to the quantum dot surface and of suppressing the black discoloration occurrence of a layer including the quantum dot positioned immediately above a light emitting device, and a compact, sheet member, wavelength conversion member and light emitting apparatus with high luminous efficiency using the quantum dot, a quantum dot of the present invention has a core portion including a semiconductor particle, and a shell portion with which the surface of the core portion is coated, and is characterized in that a weight reduction up to 490° C. is within 75% in a TG-DTA profile. Further, the quantum dot of the invention is characterized in that oleylamine (OLA) is not observed in GC-MS qualitative analysis at 350° C.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: June 9, 2020
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Eiichi Kanaumi, Yoshikazu Nageno
  • Patent number: 10670230
    Abstract: A wavelength conversion member having quantum dots is provided. The wavelength conversion member includes a quantum dot layer including quantum dots, and an organic film on a surface of the quantum dot layer. The quantum dot layer includes a first layer disposed on a first side of the wavelength conversion member that is closest to a light emitting device or on a light input surface side, and a second layer disposed on a second side of the wavelength conversion member that is farthest from the light emitting device or on a light output surface side. A light scattering agent is included in the first layer and the second layer. The quantum dots are not included in the first layer and are included in the second layer.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: June 2, 2020
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Eiichi Kanaumi
  • Patent number: 10656319
    Abstract: There is provided a high-efficiency and high-definition liquid crystal display device in which a white light source is constituted by using a fluorescent substance composed of a quantum dot having a minute particle size, and an LED light-emitting element, light from the light source is allowed to be incident from one lateral surface of a backlight provided on a rear surface of the liquid crystal display device, and thus an amount of the quantum dot fluorescent substance that is used is reduced, and the thickness of the liquid crystal display device is made smaller as a whole.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: May 19, 2020
    Assignee: NS MATERIALS INC.
    Inventors: Shingo Kokudo, Eiichi Kanaumi
  • Patent number: 10598844
    Abstract: It is an object of the present invention to provide a wavelength conversion member capable of appropriately performing color conversion compared to the prior arts and a light-emitting apparatus, a light-emitting element, a light source apparatus, and a display apparatus using the wavelength conversion member. A wavelength conversion member of the present invention includes a light incident surface, a light emission surface and a side face that connects between the light incident surface and the light emission surface, and includes a container provided with a storage space inside the side face, a wavelength conversion substance that fills the inside of the storage space and a colored layer formed on the side face.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: March 24, 2020
    Assignee: NS MATERIALS INC.
    Inventors: Shingo Kokudo, Akiharu Miyanaga, Eiichi Kanaumi, Tetsuji Ito, Yoshikazu Nageno
  • Patent number: 10598843
    Abstract: To provide a wavelength converting member that allows for improved yield, in which air bubbles can be prevented from being left in a resin containing a wavelength converting material; a light emitting device, a light emitting element, a light source unit, a display device, and a light guide member using the wavelength converting member; and a method of producing the wavelength converting member. A wavelength converting member has a receptacle provided with a receiving space; and a molding containing a wavelength converting material, placed in the receiving space. This allows air bubbles from being left in the wavelength converting material and improves the yield.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: March 24, 2020
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Eiichi Kanaumi, Shingo Kokudo
  • Patent number: 10578791
    Abstract: To provide a light guide member which has less components than conventional ones and has stable wavelength conversion efficiency; and a light source unit using the light guide member. A light guide member includes: a light guide plate; a receiving space formed in the light guide plate to face a light entrance plane; and a wavelength converting material placed in the receiving space. With the use of the light guide member, the number of components can be reduced and stable wavelength conversion efficiency can be achieved. Further, the production process can be facilitated and the production cost can be reduced.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: March 3, 2020
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Eiichi Kanaumi, Shingo Kokudo
  • Publication number: 20200006604
    Abstract: A method of producing a wavelength converting member is provided. The method includes forming a quantum dot layer on a bottom organic layer, and forming a top organic layer on the quantum dot layer. The quantum dot layer includes quantum dots. A moisture vapor transmission rate of the top organic layer and the bottom organic layer is at least 0.006 (g/m2·day) and less than 9 (g/m2·day).
    Type: Application
    Filed: September 11, 2019
    Publication date: January 2, 2020
    Applicant: NS MATERIALS INC.
    Inventors: Akiharu MIYANAGA, Eiichi KANAUMI
  • Publication number: 20200006603
    Abstract: A wavelength converting member is provided. The wavelength converting member includes a quantum dot layer and an outer layer. The quantum dot layer includes quantum dots. The outer layer is on an outer side of the quantum dot layer. A moisture vapor transmission rate of the outer layer is at least 0.006 (g/m2·day) and less than 9 (g/m2·day).
    Type: Application
    Filed: September 11, 2019
    Publication date: January 2, 2020
    Applicant: NS MATERIALS INC.
    Inventors: Akiharu MIYANAGA, Eiichi KANAUMI
  • Publication number: 20190383467
    Abstract: A wavelength conversion member having quantum dots is provided. The wavelength conversion member includes a quantum dot layer including quantum dots, and an organic film on a surface of the quantum dot layer. The quantum dot layer includes a first layer disposed on a first side of the wavelength conversion member that is closest to a light emitting device or on a light input surface side, and a second layer disposed on a second side of the wavelength conversion member that is farthest from the light emitting device or on a light output surface side. A light scattering agent is included in the first layer and the second layer. The quantum dots are not included in the first layer and are included in the second layer.
    Type: Application
    Filed: August 29, 2019
    Publication date: December 19, 2019
    Applicant: NS MATERIALS INC.
    Inventors: Akiharu MIYANAGA, Eiichi KANAUMI
  • Publication number: 20190369427
    Abstract: To provide a liquid crystal display device having a stable optical property, a liquid crystal display device includes a liquid crystal display panel having a counter substrate, a TFT substrate, and a liquid crystal layer disposed between the substrates, a light guide plate disposed on a back side of the liquid crystal display panel, a seal member configured to seal a gap between the counter substrate and the light guide plate, and a quantum dot-containing sheet disposed between the TFT substrate and the light guide plate. The quantum dot-containing sheet is sealed with the seal member.
    Type: Application
    Filed: November 13, 2017
    Publication date: December 5, 2019
    Applicant: NS Materials Inc.
    Inventors: Eiichi KANAUMI, Akiharu MIYANAGA
  • Patent number: 10436418
    Abstract: To provide a wavelength conversion member, molded body, wavelength conversion apparatus, sheet member, light emitting apparatus, light guide apparatus and display apparatus particularly capable of suppressing the black discoloration occurrence of a resin layer positioned immediately above a light emitting device as compared with conventional techniques, the present invention provides an LED apparatus having a storage portion, an LED chip disposed inside the storage portion, and a resin layer filled inside the storage portion, the resin layer is comprised by having a first resin layer on the side close to an LED device, and a second resin layer on the side far from the LED device, a light scattering agent is included in at least the first resin layer, and quantum dots are not included in the first resin layer and are included in the second resin layer.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: October 8, 2019
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Eiichi Kanaumi
  • Publication number: 20190298251
    Abstract: Provided is a measuring instrument which is portable while enabling the measurement of the accumulation level of fluorescent substances accumulated in the skin.
    Type: Application
    Filed: October 24, 2017
    Publication date: October 3, 2019
    Inventors: Eiichi KANAUMI, Tomoyuki OGAWA, Akiharu MIYANAGA
  • Patent number: 10422937
    Abstract: To provide a wavelength converting member in which the occurrence of blackening can be suppressed compared to the prior art; and a light emitting device, a light emitting element, a light source unit, and a display device using the wavelength converting member. The wavelength converting member includes: a receptacle including a light entrance plane and a light exit plane opposite to the light entrance plane and provided with a receiving space inside the light entrance plane and the light exit plane; and a wavelength conversion layer having quantum dots that is placed in the receiving space. The distance between the light entrance plane and the wavelength conversion layer is longer than the distance between the light exit plane and the wavelength conversion layer.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: September 24, 2019
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Shingo Kokudo, Eiichi Kanaumi, Tetsuji Ito, Yoshikazu Nageno
  • Publication number: 20190157516
    Abstract: A resin molded product is provided and capable of increasing a degree of freedom of a shape compared to prior arts, further provided with increased durability against environmental changes and improved reliability, a manufacturing method thereof, and a wavelength conversion member and an illumination member. The resin molded product is implemented by molding resin in which quantum dots are dispersed. The resin preferably contains a dispersant composed of metal soap. For example, a wavelength conversion bar (fluorescent bar) interposed between a light-emitting device such as an LED and a light-guiding board is molded using quantum-dot-containing resin.
    Type: Application
    Filed: January 24, 2019
    Publication date: May 23, 2019
    Applicant: NS MATERIALS INC.
    Inventors: Kazuyuki YAMASHITA, Eiichi KANAUMI, Akiharu MIYANAGA
  • Patent number: 10266769
    Abstract: To provide a quantum dot and manufacturing method of the dot particularly capable of reducing organic residues adhering to the quantum dot surface and of suppressing the black discoloration occurrence of a layer including the quantum dot positioned immediately above a light emitting device, and a compact, sheet member, wavelength conversion member and light emitting apparatus with high luminous efficiency using the quantum dot, a quantum dot of the present invention has a core portion including a semiconductor particle, and a shell portion with which the surface of the core portion is coated, and is characterized in that a weight reduction up to 490° C. is within 75% in a TG-DTA profile. Further, the quantum dot of the invention is characterized in that oleylamine (OLA) is not observed in GC-MS qualitative analysis at 350° C.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: April 23, 2019
    Assignee: NS MATERIALS INC.
    Inventors: Akiharu Miyanaga, Eiichi Kanaumi, Yoshikazu Nageno
  • Publication number: 20190025211
    Abstract: Particularly provided is a method and a system for screening nanoparticles which allow effective search of conditions for surface modification of nanoparticles and reduction in the time, the labor, and the amount of a sample required for the surface modification compared with conventional techniques. The method for screening nanoparticles includes the steps of: dividing a nanoparticle suspension for a respective plurality of containers provided in a containment receptacle; performing surface modification on nanoparticles under different conditions for the respective containers; preparing evaluation samples by adding a dispersion medium into each container and mixing the nanoparticles and the dispersion medium; and performing evaluation on the evaluation sample in each container by optical analysis.
    Type: Application
    Filed: August 19, 2016
    Publication date: January 24, 2019
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, NS MATERIALS INC.
    Inventors: Hiroyuki NAKAMURA, Maki SAEKI, Masanori TANAKA, Eiichi KANAUMI