Patents by Inventor Yoshinori Murazaki

Yoshinori Murazaki 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: 20240052240
    Abstract: Provided is an oxide fluorescent material having a light emission peak in a wavelength range from red light to near-infrared light. The oxide fluorescent material has a composition including: a first element M1 being at least one element selected from the group consisting of Li, Na, K, Rb, and Cs; a second element M2 being at least one element selected from the group consisting of Ca, Sr, Mg, Ba, and Zn; Ge; O (oxygen); and Cr, the composition optionally including: a third element M3 being at least one element selected from the group consisting of Si, Ti, Zr, Sn, Hf, and Pb; and a fourth element M4 being at least one element selected from the group consisting of Eu, Ce, Tb, Pr, Nd, Sm, Yb, Ho, Er, Tm, Ni, and Mn. When the molar ratio of Ge, or the total molar ratio of the third element M3 and Ge in the case of comprising the third element M3, in 1 mol of the composition of the oxide fluorescent material is 6, the molar ratio of the first element M1 is 1.5 or more and 2.
    Type: Application
    Filed: November 8, 2021
    Publication date: February 15, 2024
    Applicant: NICHIA CORPORATION
    Inventor: Yoshinori MURAZAKI
  • Publication number: 20230167358
    Abstract: To provide an oxide fluorescent material that has a light emission peak wavelength in a wavelength range of from red light to near infrared light. The oxide fluorescent material has a composition encompassed in a compositional formula represented by the following formula (1): (Li1-tM1t)u(Ga1-vM2v)5Ow:Crx,Niy,M3z,??(1) wherein in the formula (1), M1 represents at least one kind of an element selected from the group consisting of Na, K, Rb, and Cs; M2 represents at least one kind of an element selected from the group consisting of B, Al, Sc, In, and a rare earth element; M3 represents at least one kind of an element selected from the group consisting of Si, Ge, Sn, Ti, Zr, Hf, Bi, V, Nb, and Ta; and t, u, v, w, x, y, and z each satisfy 0?t?1.0, 0.7?u?1.6, 0?v<1.0, 7.85?w?11.5, 0.05?x?1.2, 0?y?0.5, 0.25<x+y?1.2, y<x, and 0?z?0.5.
    Type: Application
    Filed: November 30, 2022
    Publication date: June 1, 2023
    Applicant: NICHIA CORPORATION
    Inventor: Yoshinori MURAZAKI
  • Publication number: 20220169923
    Abstract: An oxide fluorescent material comprises: at least one first element M1 selected from Li, Na, K, Rb, and Cs; at least one second element M2 selected from Mg, Ca, Sr, Ba, and Zn; at least one third element M3 selected from B, Al, Ga, In, and rare earth elements; at least one fourth element M4 selected from Si, Ti, Ge, Zr, Sn, Hf, and Pb; O; and Cr, wherein when the molar ratio of the at least one fourth element M4 in 1 mol of the composition is 5, the molar ratio of the at least one first element M1 is 0.7 or more and 1.3 or less, the molar ratio of the at least one second element M2 is 1.5 or more and 2.5 or less, the molar ratio of the at least one third element M3 is 0.7 or more and 1.3 or less, the molar ratio of oxygen is 12.9 or more and 15.1 or less, and the molar ratio of Cr is more than 0 and 0.2 or less, and wherein the oxide fluorescent material has a light emission peak wavelength in a range of 700 nm or more and 1,050 nm or less in a light emission spectrum of the oxide fluorescent material.
    Type: Application
    Filed: November 30, 2021
    Publication date: June 2, 2022
    Applicant: NICHIA CORPORATION
    Inventor: Yoshinori MURAZAKI
  • Patent number: 11292963
    Abstract: Provided is a wavelength converting member and a method of producing the same. Proposed is a wavelength converting member including: a fluorescent material containing at least one kind selected from a nitride-based fluorescent material and an oxynitride-based fluorescent material; and an aluminate containing at least one kind selected from the group consisting of a rare earth aluminate and an alkaline earth metal aluminate. Further, a method of producing a wavelength converting member, including: preparing a molded body obtained by mixing a fluorescent material containing at least one kind selected from a nitride-based fluorescent material and an oxynitride-based fluorescent material and an aluminate containing at least one kind selected from the group consisting of a rare earth aluminate and an alkaline earth metal aluminate; and sintering the molded body to obtain a wavelength converting member containing the fluorescent material and the aluminate, is proposed.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: April 5, 2022
    Assignee: NICHIA CORPORATION
    Inventor: Yoshinori Murazaki
  • Patent number: 11162025
    Abstract: A boron nitride fluorescent material, having at least one light emission peak wavelength in a range of 480 nm or more and less than 650 nm as excited with light having a light emission peak wavelength in a range of 250 nm or more and 460 nm or less, and comprising: at least one element A selected from the group consisting of alkaline earth metal elements; nitrogen and boron; and optionally at least one element M1 selected from the group consisting of Tb, Sm, Pr, Ce, Mn, and Yb.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: November 2, 2021
    Assignee: NICHIA CORPORATION
    Inventor: Yoshinori Murazaki
  • Patent number: 10700242
    Abstract: Provided is a method of producing a wavelength conversion member, comprising the steps of forming a fluorescent material layer on the top surface of a substrate and filling a translucent material into the fluorescent material layer. The fluorescent material layer contains fluorescent material particles and has voids between the fluorescent material particles. The translucent material has a lower refractive index than the fluorescent material particles and is filled into a part of the voids to form a filled region in a manner to allow the voids to be partially left unfilled with the translucent material.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: June 30, 2020
    Assignee: NICHIA CORPORATION
    Inventor: Yoshinori Murazaki
  • Publication number: 20190309222
    Abstract: A boron nitride fluorescent material, having at least one light emission peak wavelength in a range of 480 nm or more and less than 650 nm as excited with light having a light emission peak wavelength in a range of 250 nm or more and 460 nm or less, and comprising: at least one element A selected from the group consisting of alkaline earth metal elements; nitrogen and boron; and optionally at least one element M1 selected from the group consisting of Tb, Sm, Pr, Ce, Mn, and Yb.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 10, 2019
    Applicant: NICHIA CORPORATION
    Inventor: Yoshinori MURAZAKI
  • Publication number: 20190177607
    Abstract: Provided is a wavelength converting member and a method of producing the same. Proposed is a wavelength converting member including: a fluorescent material containing at least one kind selected from a nitride-based fluorescent material and an oxynitride-based fluorescent material; and an aluminate containing at least one kind selected from the group consisting of a rare earth aluminate and an alkaline earth metal aluminate. Further, a method of producing a wavelength converting member, including: preparing a molded body obtained by mixing a fluorescent material containing at least one kind selected from a nitride-based fluorescent material and an oxynitride-based fluorescent material and an aluminate containing at least one kind selected from the group consisting of a rare earth aluminate and an alkaline earth metal aluminate; and sintering the molded body to obtain a wavelength converting member containing the fluorescent material and the aluminate, is proposed.
    Type: Application
    Filed: December 6, 2018
    Publication date: June 13, 2019
    Applicant: NICHIA CORPORATION
    Inventor: Yoshinori MURAZAKI
  • Publication number: 20180182932
    Abstract: Provided is a method of producing a wavelength conversion member, comprising the steps of forming a fluorescent material layer on the top surface of a substrate and filling a translucent material into the fluorescent material layer. The fluorescent material layer contains fluorescent material particles and has voids between the fluorescent material particles. The translucent material has a lower refractive index than the fluorescent material particles and is filled into a part of the voids to form a filled region in a manner to allow the voids to be partially left unfilled with the translucent material.
    Type: Application
    Filed: December 26, 2017
    Publication date: June 28, 2018
    Applicant: NICHIA CORPORATION
    Inventor: Yoshinori MURAZAKI
  • Patent number: 9823557
    Abstract: A wavelength converting member includes at least a first, second, and third regions, circumferentially on a disc-shaped light-transmissive substrate. The first region includes, from a light incident direction, a first and second phosphor layers. The first phosphor layer includes a first phosphor to absorb at least part of incident light and to emit a first light having a wavelength different from the incident light. The first phosphor layer defines an indentation in a surface on the second phosphor layer side, with a depth a half or more of the thickness of a portion of the first phosphor layer absent of the indentation. The second phosphor layer includes a second phosphor to absorb at least part of the first light emitted by the first phosphor and to emit a second light having a wavelength different from the first light, and is disposed in the indentation of the first phosphor layer.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: November 21, 2017
    Assignee: Nichia Corporation
    Inventors: Naoki Saka, Yoshinori Murazaki, Isamu Niki
  • Publication number: 20170153536
    Abstract: A wavelength converting member includes at least a first, second, and third regions, circumferentially on a disc-shaped light-transmissive substrate. The first region includes, from a light incident direction, a first and second phosphor layers. The first phosphor layer includes a first phosphor to absorb at least part of incident light and to emit a first light having a wavelength different from the incident light. The first phosphor layer defines an indentation in a surface on the second phosphor layer side, with a depth a half or more of the thickness of a portion of the first phosphor layer absent of the indentation. The second phosphor layer includes a second phosphor to absorb at least part of the first light emitted by the first phosphor and to emit a second light having a wavelength different from the first light, and is disposed in the indentation of the first phosphor layer.
    Type: Application
    Filed: February 13, 2017
    Publication date: June 1, 2017
    Inventors: Naoki SAKA, Yoshinori MURAZAKI, Isamu NIKI
  • Patent number: 9609293
    Abstract: A wavelength converting member includes at least a first, second, and third regions, circumferentially on a disc-shaped light-transmissive substrate. The first region includes, from a light incident direction, a first and second phosphor layers. The first phosphor layer includes a first phosphor to absorb at least part of incident light and to emit a first light having a wavelength different from the incident light. The first phosphor layer defines an indentation in a surface on the second phosphor layer side, with a depth a half or more of the thickness of a portion of the first phosphor layer absent of the indentation. The second phosphor layer includes a second phosphor to absorb at least part of the first light emitted by the first phosphor and to emit a second light having a wavelength different from the first light, and is disposed in the indentation of the first phosphor layer.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: March 28, 2017
    Assignee: NICHIA CORPORATION
    Inventors: Naoki Saka, Yoshinori Murazaki, Isamu Niki
  • Publication number: 20160150200
    Abstract: A wavelength converting member includes at least a first, second, and third regions, circumferentially on a disc-shaped light-transmissive substrate. The first region includes, from a light incident direction, a first and second phosphor layers. The first phosphor layer includes a first phosphor to absorb at least part of incident light and to emit a first light having a wavelength different from the incident light. The first phosphor layer defines an indentation in a surface on the second phosphor layer side, with a depth a half or more of the thickness of a portion of the first phosphor layer absent of the indentation. The second phosphor layer includes a second phosphor to absorb at least part of the first light emitted by the first phosphor and to emit a second light having a wavelength different from the first light, and is disposed in the indentation of the first phosphor layer.
    Type: Application
    Filed: November 20, 2015
    Publication date: May 26, 2016
    Inventors: Naoki SAKA, Yoshinori MURAZAKI, Isamu NIKI
  • Patent number: 8872203
    Abstract: In a semiconductor light-emitting device, light from a laser diode is output to the outside after the luminance of the light being enhanced. It includes a support body provided with lead terminals, one or more laser diodes mounted on the support body, a cylindrical reflector fixed to the support body to surround the laser diode(s) and provided with a light reflection surface formed on an inner surface thereof, and a cap placed to cover an opening distal end face of the reflector and held at an opening distal end part of the reflector, the cap being provided at a central part thereof with a solid fluorescent member including a fluorescent substance that is excited by the light from the laser diode and emits light different in colors from light emitted by the laser diode.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: October 28, 2014
    Assignee: Nichia Corporation
    Inventors: Shinichi Nagahama, Atsutomo Hama, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi, Yoshinori Murazaki
  • Patent number: 8648523
    Abstract: The light emitting device comprises a light emitting element, a red phosphor formed from a nitride phosphor and a green phosphor formed from a halosilicate, wherein the emission spectrum has a first peak at a wavelength between 440 nm and 470 nm, a second peak at a wavelength between 510 nm and 550 nm and a third peak at a wavelength between 630 nm and 670 nm, and the minimum relative light emission intensity between the second peak wavelength and the third peak wavelength is 80% or less of whichever the lower of the relative light emission intensity of the second peak wavelength and the relative light emission intensity of the third peak wavelength.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: February 11, 2014
    Assignee: Nichia Corporation
    Inventors: Yoshinori Murazaki, Masafumi Harada, Suguru Takashima
  • Patent number: 8384092
    Abstract: A light emitting device that has excellent color rendering performance is provided. The light emitting device comprises, a light emitting element, a red phosphor formed from a nitride phosphor that emits light when excited by the light from the light emitting element, a green phosphor formed from a halosilicate that emits light when excited by the light from the light emitting element and a YAG phosphor emitting light when excited by the light from the light emitting element.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: February 26, 2013
    Assignee: Nichia Corporation
    Inventors: Yoshinori Murazaki, Masafumi Harada, Suguru Takashima
  • Patent number: 8197111
    Abstract: A light emitting device includes an excitation light source that emits excitation light, a wavelength conversion member, a light guide, and a light guide distal end member. The wavelength conversion member absorbs the excitation light emitted from the excitation light source, converts its wavelength, and releases light of a predetermined wavelength band. The light guide in which the center part (core) of its cross section has a refractive index that is higher than the refractive index of the peripheral portion (cladding) guides the excitation light emitted from the excitation light source to the wavelength conversion member. The light guide distal end member supports a distal end of the light guide on the wavelength conversion member side. The light guide distal end member is formed from a material that reflects the excitation light and/or the light that has undergone wavelength conversion.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: June 12, 2012
    Assignee: Nichia Corporation
    Inventors: Atsutomo Hama, Tomotaka Honda, Shinichi Nagahama, Junji Takeichi, Yoshinori Murazaki, Hiroto Tamaki, Yukihiro Hayashi
  • Patent number: 8169131
    Abstract: A lamp includes a light-emitting body that converts electric energy into light energy and a translucent glass covering the light-emitting body, wherein a phosphor layer is provided on at least inner or outer surface of the translucent glass. The phosphor layer includes a fluorescent material including a first phosphor that at least partially converts energy emitted by an excitation source, which emits ultraviolet having a wavelength of about 365 nm, to a first emission spectrum that is different from the energy, and a second phosphor that at least partially converts the first emission spectrum to a second emission spectrum. Peak wavelengths of the emission spectrum of the first and second phosphors have a relation of complementary colors so that when the light created due to the peak wavelengths of the first and second phosphors are mixed, the resulting light is in the white region.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: May 1, 2012
    Assignee: Nichia Corporation
    Inventors: Yoshinori Murazaki, Shinpei Kinoshita, Masatoshi Kameshima, Suguru Takashima, Hiroto Tamaki
  • Patent number: 8130342
    Abstract: Disclosed a liquid crystal display device including a backlight device including a white-emitting LED device which emits a white light arising from a color mixture created through a combination of a blue-emitting LED, a red-emitting phosphor and a green-emitting phosphor, and a color filter equipping color pixels exhibiting plural colors including a red pixel and formed on a transparent substrate, wherein the white-emitting LED device is enabled to exhibit an emission spectrum having a first peak wavelength falling within a range of 440-470 nm, a second peak wavelength falling within a range of 510-550 nm and a third peak wavelength falling within a range of 630-670 nm, and a red display chromaticity of the liquid crystal display device is confined within a region bounded by lines connecting four points (0.620, 0.280), (0.620, 0.300), (0.680, 0.315) and (0.680, 0.280) based on an xy chromaticity coordinate system.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: March 6, 2012
    Assignees: Toppan Printing Co., Ltd., Nichia Corporation
    Inventors: Yoshiko Ishimaru, Hidesato Hagiwara, Yoshinori Murazaki, Suguru Takashima, Masafumi Harada
  • Patent number: 8076847
    Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: December 13, 2011
    Assignee: Nichia Corporation
    Inventors: Hiroto Tamaki, Takahiro Naitou, Yoshinori Murazaki