Patents by Inventor Yasumasa Ooya
Yasumasa Ooya 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: 10886434Abstract: A white LED lamp including: a conductive portion; a light emitting diode chip mounted on the conductive portion, for emitting a primary light having a peak wavelength of 360 nm to 420 nm; a transparent resin layer including a first hardened transparent resin, for sealing the light emitting diode chip; and a phosphor layer covering the transparent resin layer, the phosphor layer being formed by dispersing a phosphor powder into a second hardened transparent resin, and the phosphor powder receiving the primary light and radiating a secondary light having a wavelength longer than that of the primary light. An energy of the primary light contained in the radiated secondary light is 0.4 mW/lm or less.Type: GrantFiled: November 6, 2014Date of Patent: January 5, 2021Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Tsutomu Ishii, Hajime Takeuchi, Yasumasa Ooya, Katsutoshi Nakagawa, Yumi Kanno, Masaki Toyoshima, Yasuhiro Shirakawa, Ryo Sakai
-
Patent number: 10473274Abstract: According to one embodiment, there is provided a white light source system including white light sources. An absolute value of a difference between (P(?)×V(?))/(P(?max1)×V(?max1)) and (B(?)×V(?))/(B(?max2)×V(?max2)) for each of the white light sources satisfies a relational expression represented by |((P(?)×V(?))/(P(?max1)×V(?max1))?(B(?)×V(?))/(B(?max2)×V(?max2))|?0.15 The white light source system has a light emission characteristic of white light emitted by the system is continuously changed along with an elapse of time by changing a mixing ratio of light beams from the white light sources.Type: GrantFiled: December 20, 2017Date of Patent: November 12, 2019Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Masahiko Yamakawa, Ryoji Tsuda, Yasumasa Ooya, Tatsunori Itoga, Yasuhiro Shirakawa, Junji Taniguchi
-
Patent number: 10107457Abstract: A lighting apparatus according to an embodiment includes a globe, an optical element including a scattering portion inside and transparent to visible light, and a light source disposed to be opposed to a light incident surface of the optical element. The scattering portion is disposed inside the globe.Type: GrantFiled: April 7, 2017Date of Patent: October 23, 2018Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Hiroshi Ohno, Mitsuaki Kato, Hiromichi Hayashihara, Hiroyasu Kondo, Ryoji Tsuda, Yasumasa Ooya
-
Publication number: 20180135813Abstract: According to one embodiment, there is provided a white light source system including white light sources. An absolute value of a difference between (P(?)×V(?))/(P(?max1)×V(?max1)) and (B(?)×V(?))/(B(?max2)×V(?max2)) for each of the white light sources satisfies a relational expression represented by |((P(?)×V(?))/(P(?max1)×V(?max1))?(B(?)×V(?))/(B(?max2)×V(?max2))|?0.15 The white light source system has a light emission characteristic of white light emitted by the system is continuously changed along with an elapse of time by changing a mixing ratio of light beams from the white light sources.Type: ApplicationFiled: December 20, 2017Publication date: May 17, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Masahiko YAMAKAWA, Ryoji TSUDA, Yasumasa OOYA, Tatsunori ITOGA, Yasuhiro SHIRAKAWA, Junji TANIGUCHI
-
Publication number: 20170211749Abstract: A lighting apparatus according to an embodiment includes a globe, an optical element including a scattering portion inside and transparent to visible light, and a light source disposed to be opposed to a light incident surface of the optical element. The scattering portion is disposed inside the globe.Type: ApplicationFiled: April 7, 2017Publication date: July 27, 2017Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Hiroshi OHNO, Mitsuaki KATO, Hiromichi HAYASHIHARA, Hiroyasu KONDO, Ryoji TSUDA, Yasumasa OOYA
-
Publication number: 20170167666Abstract: An optical element according to an embodiment is formed from a material transparent to visible light and has a rotationally symmetrical shape with respect to the central axis. A cavity containing no transparent material is provided inside the optical element. The inner surface of the cavity has a shape in which a boundary line of the cavity along which a plane including the central axis intersects the inner surface includes a curve portion expanding toward the outside of the optical element. The inner surface of the cavity does not include any surface recessed inwardly.Type: ApplicationFiled: February 28, 2017Publication date: June 15, 2017Applicants: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Hiroshi OHNO, Mitsuaki KATO, Hiromichi HAYASHIHARA, Hiroyasu KONDO, Ryoji TSUDA, Yasumasa OOYA
-
Patent number: 9660149Abstract: An LED light emitting device is provided that has high color rendering properties and is excellent color uniformity and, at the same time, can realize even luminescence unattainable by conventional techniques. A phosphor having a composition represented by formula: (Sr2-X-Y-Z-?BaXMgYMnZEu?)SiO4 wherein x, y, z, and ? are respectively coefficients satisfying 0.1<x<1, 0<y<0.5, 0<z<0.1, y>z, and 0.01<?<0.2 is provided. The phosphor is used in combination with ultraviolet and blue light emitting diodes having a luminescence peak wavelength of 360 to 470 nm to form an LED light emitting device.Type: GrantFiled: October 23, 2015Date of Patent: May 23, 2017Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Tsutomu Ishii, Yoshitaka Funayama, Yumi Ito, Yasumasa Ooya, Ryo Sakai, Katsutoshi Nakagawa, Hajime Takeuchi, Yasuhiro Shirakawa
-
Publication number: 20160049558Abstract: An LED light emitting device is provided that has high color rendering properties and is excellent color uniformity and, at the same time, can realize even luminescence unattainable by conventional techniques. A phosphor having a composition represented by formula: (Sr2-X-Y-Z-?BaXMgYMnZEu?)SiO4 wherein x, y, z, and ? are respectively coefficients satisfying 0.1<x<1, 0<y<0.5, 0<z<0.1, y>z, and 0.01<?<0.2 is provided. The phosphor is used in combination with ultraviolet and blue light emitting diodes having a luminescence peak wavelength of 360 to 470 nm to form an LED light emitting device.Type: ApplicationFiled: October 23, 2015Publication date: February 18, 2016Inventors: Tsutomu Ishii, Yoshitaka Funayama, Yumi Ito, Yasumasa Ooya, Ryo Sakai, Katsutoshi Nakagawa, Hajime Takeuchi, Yasuhiro Shirakawa
-
Patent number: 9228718Abstract: In one embodiment, an LED light bulb includes an LED module, a base part on which the LED module is disposed, and a globe attached to the base part. The LED module includes an ultraviolet to violet light-emitting LED chip mounted on a surface of a substrate. The globe has a shape in which a cross section in a direction in parallel to the surface of the substrate is circular. A phosphor screen emitting white light by absorbing the ultraviolet to violet light emitted from the LED chip is provided on an inner surface of the globe. The globe has a shape in which a diameter D1 at an attaching part to the base part is smaller than a diameter D2 at a maximum portion of the cross section.Type: GrantFiled: March 12, 2013Date of Patent: January 5, 2016Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Yasumasa Ooya, Masahiko Yamakawa, Yasuhiro Shirakawa, Katsutoshi Nakagawa
-
Patent number: 9169436Abstract: An LED light emitting device is provided that has high color rendering properties and is excellent color uniformity and, at the same time, can realize even luminescence unattainable by conventional techniques. A phosphor having a composition represented by formula: (Sr2-X-Y-Z-?BaXMgYMnZEu?)SiO4 wherein x, y, z, and ? are respectively coefficients satisfying 0.1<x<1, 0<y<0.5, 0<z<0.1, y>z, and 0.01<?<0.2 is provided. The phosphor is used in combination with ultraviolet and blue light emitting diodes having a luminescence peak wavelength of 360 to 470 nm to form an LED light emitting device.Type: GrantFiled: May 14, 2012Date of Patent: October 27, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Tsutomu Ishii, Yoshitaka Funayama, Yumi Ito, Yasumasa Ooya, Ryo Sakai, Katsutoshi Nakagawa, Hajime Takeuchi, Yasuhiro Shirakawa
-
Patent number: 9115855Abstract: A white light source 1 of an embodiment has color temperature of 2600 [K] or more and less than 3200 [K]. The white light source of the embodiment has a ratio of a minimum emission intensity to a maximum emission intensity in a wavelength region of from 450 to 610 [nm] on an emission spectrum of 0.16 or more and less than 0.35.Type: GrantFiled: September 13, 2013Date of Patent: August 25, 2015Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Tatsunori Itoga, Masahiko Yamakawa, Yasumasa Ooya
-
Patent number: 9039218Abstract: A white LED lamp including: a conductive portion; a light emitting diode chip mounted on the conductive portion, for emitting a primary light having a peak wavelength of 360 nm to 420 nm; a transparent resin layer including a first hardened transparent resin, for sealing the light emitting diode chip; and a phosphor layer covering the transparent resin layer, the phosphor layer being formed by dispersing a phosphor powder into a second hardened transparent resin, and the phosphor powder receiving the primary light and radiating a secondary light having a wavelength longer than that of the primary light. An energy of the primary light contained in the radiated secondary light is 0.4 mW/Im or less.Type: GrantFiled: September 14, 2012Date of Patent: May 26, 2015Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Tsutomu Ishii, Hajime Takeuchi, Yasumasa Ooya, Katsutoshi Nakagawa, Yumi Ito, Masaki Toyoshima, Yasuhiro Shirakawa, Ryo Sakai
-
Publication number: 20150060926Abstract: A white LED lamp including: a conductive portion; a light emitting diode chip mounted on the conductive portion, for emitting a primary light having a peak wavelength of 360 nm to 420 nm; a transparent resin layer including a first hardened transparent resin, for sealing the light emitting diode chip; and a phosphor layer covering the transparent resin layer, the phosphor layer being formed by dispersing a phosphor powder into a second hardened transparent resin, and the phosphor powder receiving the primary light and radiating a secondary light having a wavelength longer than that of the primary light. An energy of the primary light contained in the radiated secondary light is 0.4 mW/lm or less.Type: ApplicationFiled: November 6, 2014Publication date: March 5, 2015Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.Inventors: Tsutomu Ishii, Hajime Takeuchi, Yasumasa Ooya, Katsutoshi Nakagawa, Yumi Ito, Masaki Toyoshima, Yasuhiro Shirakawa, Ryo Sakai
-
Patent number: 8955996Abstract: In one embodiment, an LED light bulb includes an LED module, a base portion on which the LED module is disposed, and a globe attached to the base portion. The LED module includes an ultraviolet to violet light-emitting LED chip mounted on a substrate. A lighting circuit and a bayonet cap are provided in and on the base portion. A fluorescent film is provided on an inner surface of the globe, and emits white light by absorbing ultraviolet to violet light emitted from the LED chip. The fluorescent film has a film thickness in a range of 80 to 800 ?m. In the LED light bulb, an amount of ultraviolet light which leaks from the globe is 0.1 mW/nm/lm or less.Type: GrantFiled: December 11, 2012Date of Patent: February 17, 2015Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Yasumasa Ooya, Masahiko Yamakawa, Yasuhiro Shirakawa, Katsutoshi Nakagawa
-
Patent number: 8933475Abstract: A light emitting device 1 according to an embodiment includes a planar alumina substrate, a semiconductor light-emitting element mounted on the alumina substrate, and a phosphor layer. The phosphor layer includes a silicone resin layer provided to cover an upper surface and a side surface of the semiconductor light-emitting element and a phosphor emitting visible light by being excited with light emitted from the semiconductor light-emitting element. The phosphor is dispersed in the silicone resin layer. The alumina substrate has a water absorption rate of 5% or more and 60% or less, and an adhesion strength between the alumina substrate and the silicone resin layer is 1 N or more.Type: GrantFiled: September 11, 2012Date of Patent: January 13, 2015Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Katsutoshi Nakagawa, Yasumasa Ooya, Yoshitaka Funayama, Daichi Usui
-
Patent number: 8896004Abstract: Disclosed are a white LED, which has color reproducibility comparable with that of a cold-cathode tube and improved brightness, and a backlight and a liquid crystal display device comprising the white LED. The white LED comprises at least one light emitting element selected from ultraviolet light emitting diodes, purple light emitting diodes, ultraviolet light emitting lasers, and purple light emitting lasers, and a phosphor layer. The phosphor layer comprises a green phosphor satisfying formula 1, a blue phosphor satisfying formula 2 or 3, and a red phosphor satisfying formula 4 or 5: a trivalent cerium- and terbium-activated rare earth boride phosphor represented by formula 1: M1-x-yCexTbyBO3 wherein M represents at least one element selected from Sc (scandium), Y (yttrium), La (lanthanum), Gd (gadolinium), and Lu (lutetium); and x and y are respective numbers of 0.03<x<0.3 and 0.03<y<0.3; a divalent europium-activated halophosphate phosphor represented by formula 2: (M2, Eu)10(PO4)6.Type: GrantFiled: April 25, 2006Date of Patent: November 25, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Ryo Sakai, Yasuhiro Shirakawa, Hajime Takeuchi, Tsutomu Ishii, Yasumasa Ooya
-
Patent number: 8872421Abstract: Certain embodiments provide a white LED for a backlight of a liquid crystal display device, which comprises an ultraviolet (or violet) light emitting element and a phosphor layer that contains a green phosphor selected from trivalent cerium- and terbium-activated rare earth borate phosphors, a blue phosphor selected from divalent europium-activated halophosphate phosphors and divalent europium-activated aluminate phosphors, and a red phosphor selected from europium-activated lanthanum oxysulfide phosphors and europium-activated yttrium oxysulfide phosphors as the contained amounts of the respective phosphors relative to the total amount of the phosphors as follows: 35-50% by weight of the green phosphor content; 50-70% by weight of the blue phosphor content; and 1-10% by weight of the red phosphor content.Type: GrantFiled: February 29, 2012Date of Patent: October 28, 2014Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Hajime Takeuchi, Ryo Sakai, Tsutomu Ishii, Yasumasa Ooya, Yasuhiro Shirakawa
-
Patent number: 8796915Abstract: In one embodiment, an LED light bulb includes an LED module, a base part on which the LED module is disposed, and a globe attached to the base part. The LED module includes an ultraviolet to violet light-emitting LED chip mounted on a substrate. A lighting circuit and a bayonet cap are provided at the base part. A phosphor screen emitting white light by absorbing the ultraviolet to violet light emitted from the LED chip is provided on an inner surface of the globe. The phosphor screen has a color in which a* is ?10 or more and +10 or less, b* is 0 (zero) or more and +30 or less, and L* is +40 or more when a body color thereof is represented by an L*a*b* color system.Type: GrantFiled: February 22, 2013Date of Patent: August 5, 2014Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Yasumasa Ooya, Masahiko Yamakawa, Yasuhiro Shirakawa, Katsutoshi Nakagawa
-
Patent number: 8632202Abstract: In a embodiment, a white LED for a backlight of a liquid crystal display device conforming to the EBU standard includes an ultraviolet (purple) light-emitting element, and a phosphor layer which contains 1 to 10 wt % of a green phosphor including a divalent europium-activated silicate phosphor, 40 to 80 wt % of a blue phosphor including at least one selected from a divalent europium-activated halo-phosphate phosphor and a divalent europium-activated aluminate phosphor, and 10 to 50 wt % of a red phosphor including at least one selected from a europium-activated lanthanum oxysulfide phosphor and a europium-activated yttrium oxysulfide phosphor.Type: GrantFiled: September 9, 2011Date of Patent: January 21, 2014Assignees: Kabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.Inventors: Hajime Takeuchi, Ryo Sakai, Tsutomu Ishii, Yasumasa Ooya, Yasuhiro Shirakawa
-
Publication number: 20140009061Abstract: A white light source 1 of an embodiment has color temperature of 2600 [K] or more and less than 3200 [K]. The white light source of the embodiment has a ratio of a minimum emission intensity to a maximum emission intensity in a wavelength region of from 450 to 610 [nm] on an emission spectrum of 0.16 or more and less than 0.35.Type: ApplicationFiled: September 13, 2013Publication date: January 9, 2014Applicants: Toshiba Materials Co., Ltd., Kabushiki Kaisha ToshibaInventors: Tatsunori ITOGA, Masahiko Yamakawa, Yasumasa Ooya