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).
-
Patent number: 7488432Abstract: The present invention provides a fluorescent material comprising a light-storing first phosphor that at least partially converts energy emitted by an excitation source 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 that is different from the first emission spectrum; a lamp equipped with such a fluorescent material; a light-emitting device that produces a whitish afterglow, comprising such a fluorescent material for converting the emission by an LED chip; and a display unit comprising a display equipped with a plurality of such light-emitting devices.Type: GrantFiled: October 27, 2004Date of Patent: February 10, 2009Assignee: Nichia CorporationInventors: Yoshinori Murazaki, Shinpei Kinoshita, Masatoshi Kameshima, Suguru Takashima, Hiroto Tamaki
-
Publication number: 20090003400Abstract: 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: ApplicationFiled: September 10, 2008Publication date: January 1, 2009Applicant: NICHIA CORPORATIONInventors: Shinichi Nagahama, Atsutomo Hama, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi, Yoshinori Murazaki
-
Publication number: 20080315235Abstract: A light emitting device is provided that has a semiconductor light emitting element and a phosphor which converts a part of the luminescence spectrum emitted from the semiconductor light emitting element. The luminescence spectrum of the semiconductor light emitting element is located between a near ultraviolet region and a short-wavelength visible region, and the phosphor is made by adding a red luminescent activator to a base material of a blue luminescent phosphor. Thereby, improving the color shading generated by the dispersion of the spectra of the light emitting elements and obtaining the light emitting device having a high brightness and a good color rendering properties. With the light emitting device, it is possible to provide the light sources for the lighting apparatus of medical treatments, the flash plate of a copying machine, etc., in which a good color rendering property is required.Type: ApplicationFiled: August 25, 2008Publication date: December 25, 2008Inventor: Yoshinori Murazaki
-
Patent number: 7432642Abstract: A light emitting device is provided that has a semiconductor light emitting element and a phosphor which converts a part of the luminescence spectrum emitted from the semiconductor light emitting element. The luminescence spectrum of the semiconductor light emitting element is located between a near ultraviolet region and a short-wavelength visible region, and the phosphor is made by adding a red luminescent activator to a base material of a blue luminescent phosphor. Thereby, improving the color shading generated by the dispersion of the spectra of the light emitting elements and obtaining the light emitting device having a high brightness and a good color rendering properties. With the light emitting device, it is possible to provide the light sources for the lighting apparatus of medical treatments, the flash plate of a copying machine, etc., in which a good color rendering property is required.Type: GrantFiled: April 25, 2002Date of Patent: October 7, 2008Assignee: Nichia CorporationInventor: Yoshinori Murazaki
-
Publication number: 20080089089Abstract: A light emitting device, comprises: an excitation light source that emits excitation light; a wavelength conversion member that absorbs the excitation light emitted from the excitation light source, converts its wavelength, and releases light of a predetermined wavelength band; a 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), and which guides the light emitted from the wavelength conversion member to the outside; and wherein the wavelength conversion member is produced by laminating a plurality of layers that wavelength-convert different wavelengths of light.Type: ApplicationFiled: September 28, 2005Publication date: April 17, 2008Applicant: NICHIA CORPORATIONInventors: Atsutomo Hama, Tomotaka Honda, Shinichi Nagahama, Junji Takeichi, Yoshinori Murazaki, Hiroto Tamaki, Yukihiro Hayashi
-
Publication number: 20080030976Abstract: A light emitting apparatus with high emission intensity and that is superior in weather resistance and reliability is obtained. The light emitting apparatus includes a light source and a wavelength-converting member for converting the wavelength of light emitted from the light source, wherein the wavelength-converting member contains a phosphor subjected to a cleaning treatment and/or a coating treatment, in a glass material having a composition of SiO2: 30 to 50%, Li2O: 0 to 15%, Na2O: 0 to 10%, K2O: 0 to 10%, Li2O+Na2O+K2O: 20 to 30%, B2O3: 5 to 15%, MgO: 0 to 10%, BaO: 0 to 10%, CaO: 0 to 10%, SrO: 0 to 10%, Al2O3: 0 to 10%, ZnO: 0 to 15%, TiO2: 10 to 20%, Nb2O5: 1 to 5%, La2O3: 0 to 5%, and TiO2+Nb2O5+La2O3: 11 to 20% by mole percentage.Type: ApplicationFiled: August 2, 2007Publication date: February 7, 2008Inventors: Yoshinori Murazaki, Yoshiki Sato
-
Publication number: 20070200095Abstract: There is provided a phosphor emitting light of high brightness and having high weatherability, which has a composition represented by the following general formula: (M11?yRy)aMgM2bM3cOa+2b+(3/2)cX2 wherein M1 is at least one element selected from the group consisting of Ca, Sr, Ba, Zn and Mn, M2 is at least one element selected from the group consisting of Si, Ge and Sn, M3 is at least one element selected from the group consisting of B, Al, Ga and In, X is at least one element selected from the group consisting of F, Cl, Br and I, R is at least one element selected from the group consisting of rare earth elements with Eu being an inevitable element, and y, a, b and c satisfy the following relationships of 0.0001?y?0.3, 7.0?a<10.0, 3.0?b<5.0 and 0?c<1.0.Type: ApplicationFiled: February 1, 2007Publication date: August 30, 2007Applicant: NICHIA CORPORATIONInventor: Yoshinori Murazaki
-
Publication number: 20070195538Abstract: An optical component that can be attached to an end portion of an optical guiding member, and a light converting member used in the optical component. The optical component comprises a cap having an engaging portion defining a bore engaged with an end member of a light guiding member, and an arranging portion defining a opening connected to the bore in the engaging portion, and a light converting member disposed in the opening formed in the arranging portion.Type: ApplicationFiled: December 12, 2006Publication date: August 23, 2007Applicant: NICHIA CORPORATIONInventors: Atsutomo Hama, Yoshinori Murazaki, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi
-
Patent number: 7247257Abstract: To minimize the variability in the emitted light color and improve the unevenness of color tone, a light emitting device comprises a light emitting element and a fluorescent substance that is excited by the light emitting element, wherein the light emitting element has an emission spectrum in a region from ultraviolet to visible light of short wavelengths, and the fluorescent substance has an emission spectrum that includes two or more emission peaks with at least two peaks of the two or more peaks being in the relation of complementary colors of each other.Type: GrantFiled: March 21, 2006Date of Patent: July 24, 2007Assignee: Nichia CorporationInventors: Yoshinori Murazaki, Takashi Ichihara
-
Patent number: 7091656Abstract: To minimize the variability in the emitted light color and improve the unevenness of color tone, a light emitting device comprises a light emitting element and a fluorescent substance that is excited by the light emitting element, wherein the light emitting element has an emission spectrum in a region from ultraviolet to visible light of short wavelengths, and the fluorescent substance has an emission spectrum that includes two or more emission peaks with at least two peaks of the two or more peaks being in the relation of complementary colors of each other.Type: GrantFiled: April 19, 2002Date of Patent: August 15, 2006Assignee: Nichia CorporationInventors: Yoshinori Murazaki, Takashi Ichihara
-
Publication number: 20060163999Abstract: To minimize the variability in the emitted light color and improve the unevenness of color tone, a light emitting device comprises a light emitting element and a fluorescent substance that is excited by the light emitting element, wherein the light emitting element has an emission spectrum in a region from ultraviolet to visible light of short wavelengths, and the fluorescent substance has an emission spectrum that includes two or more emission peaks with at least two peaks of the two or more peaks being in the relation of complementary colors of each other.Type: ApplicationFiled: March 21, 2006Publication date: July 27, 2006Applicant: Nichia CorporationInventors: Yoshinori Murazaki, Takashi Ichihara
-
Publication number: 20060038477Abstract: 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: ApplicationFiled: October 18, 2005Publication date: February 23, 2006Applicant: Nichia CorporationInventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
-
Publication number: 20050212397Abstract: The present invention provides a fluorescent material comprising a light-storing first phosphor that at least partially converts energy emitted by an excitation source 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 that is different from the first emission spectrum; a lamp equipped with such a fluorescent material; a light-emitting device that produces a whitish afterglow, comprising such a fluorescent material for converting the emission by an LED chip; and a display unit comprising a display equipped with a plurality of such light-emitting devices.Type: ApplicationFiled: October 27, 2004Publication date: September 29, 2005Applicant: NICHIA CORPORATIONInventors: Yoshinori Murazaki, Shinpei Kinoshita, Masatoshi Kameshima, Suguru Takashima, Hiroto Tamaki
-
Publication number: 20050179364Abstract: A light emitting device related to the present invention, which has a semiconductor light emitting element and a phosphor which converts a part of the luminescence spectrum emitted from the semiconductor light emitting element, characterized in that the luminescence spectrum of the semiconductor light emitting element is located between a near ultraviolet region and a short-wavelength visible region, and the phosphor is made by adding a red luminescent activator to a base material of a blue luminescent phosphor, thereby improving the color shading generated by the dispersion of the spectra of the light emitting elements and obtaining the light emitting device having a high brightness and a good color rendering properties. With this, it is possible to provide the light sources for the lighting apparatus of medical treatments, the flash plate of a copying machine, etc., in which a good color rendering property is required.Type: ApplicationFiled: April 25, 2002Publication date: August 18, 2005Inventor: Yoshinori Murazaki
-
Publication number: 20050156496Abstract: A light emitting device that emits light of various colors by blending lights emitted by two or more kinds of fluorescent materials which are substantially directly excited by the light emitted by an excitation source having principal emission peak in a range from 250 nm to 500 nm. Each of the fluorescent material is of a direct-transition type.Type: ApplicationFiled: September 16, 2004Publication date: July 21, 2005Inventors: Suguru Takashima, Masatoshi Kameshima, Hiroto Tamaki, Junji Takeichi, Yoshinori Murazaki, Shinpei Kinoshita
-
Publication number: 20040135504Abstract: 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: ApplicationFiled: November 24, 2003Publication date: July 15, 2004Inventors: Hiroto Tamaki, Masatoshi Kemeshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
-
Publication number: 20040095063Abstract: To minimize the variability in the emitted light color and improve the unevenness of color tone, a light emitting device comprises a light emitting element and a fluorescent substance that is excited by the light emitting element, wherein the light emitting element has an emission spectrum in a region from ultraviolet to visible light of short wavelengths, and the fluorescent substance has an emission spectrum that includes two or more emission peaks with at least two peaks of the two or more peaks being in the relation of complementary colors of each other.Type: ApplicationFiled: October 20, 2003Publication date: May 20, 2004Inventors: Yoshinori Murazaki, Takashi Ichihara
-
Patent number: 6617781Abstract: A red light emitting afterglow photoluminescence phosphor is a rare earth oxysulfide phosphor activated by Europium, which chemical formula is as follows: Ln2O2S:Eux,My 0.00001≦x≦0.5 0.00001≦y≦0.3 wherein Ln is at least one selected from the group consisting of Y, La, Gd and Lu; M is a coactivator which is at least one selected from the group consisting of Mg, Ti, Nb, Ta and Ga in the chemical formula.Type: GrantFiled: February 20, 2001Date of Patent: September 9, 2003Assignee: Nichia CorporationInventors: Yoshinori Murazaki, Kiyotaka Arai
-
Publication number: 20010043042Abstract: A red light emitting afterglow photoluminescence phosphor is a rare earth oxysulfide phosphor activated by Europium, which chemical formula is follows:Type: ApplicationFiled: February 20, 2001Publication date: November 22, 2001Inventors: Yoshinori Murazaki, Kiyotaka Arai
-
Patent number: 5859496Abstract: An afterglow lamp has a light emitting section for converting electric energy to optical energy. A fluorescent layer is excited to emit-light by the light emitting section and is represented by the general formula (M.sub.1-p-q, Eu.sub.p Q.sub.q)O.multidot.n(Al.sub.1-m B.sub.m).sub.2 O.sub.3 .multidot.kP .sub.2 O.sub.5 .multidot..alpha.X. The values of p, q, n, m, k, .alpha. and .alpha./n are in the ranges 0.0001.ltoreq.p.ltoreq.0.5, 0.0001.ltoreq.q.ltoreq.0.5, 0.5.ltoreq.n.ltoreq.3.0, O.ltoreq.m.ltoreq.0.5, O.ltoreq.k.ltoreq.0.2, O.ltoreq..alpha..ltoreq.0.5, and O.ltoreq..alpha./n.ltoreq.0.4. M is at least one selected from a group of divalent metals including Mg; Q is a coactivator and at least one selected from a group including Mn, Zr, Nb, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; and X is at least one selected from halogen elements.Type: GrantFiled: May 10, 1996Date of Patent: January 12, 1999Assignee: Nichia Chemical Industries, Ltd.Inventors: Yoshinori Murazaki, Keiji Ichinomiya