Patents by Inventor Kazuhiko Kuroki
Kazuhiko Kuroki 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).
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Patent number: 5858563Abstract: In an organic electroluminescent device according to the present invention, at least a luminescent layer using an organic material is provided between a hole injection electrode and an electron injection electrode, and a luminescent material composed of a condensed polycyclic aromatic compound having condensed rings each having a benzene ring as a basic unit the number of which is in the range of 2 to 10, along with an organic material having hole transporting characteristics, is contained as the organic material in the luminescent layer.Type: GrantFiled: February 20, 1996Date of Patent: January 12, 1999Assignee: Sanyo Electric Co., Ltd.Inventors: Takeshi Sano, Takanori Fujii, Yuji Hamada, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5818323Abstract: A magnetoresistive device has an alloy film, including a ferromagnetic substance and a non-magnetic substance which is not soluble in solid phase in the ferromagnetic substance or is in a eutectic relation with the ferromagentic substance. The ferromagnetic substance forms grains in the non-magnetic substance, and the grains preferably have anisotropic shapes. The non-magnetic substance is conducting. The alloy film is composed of a plurality of alloy film stripes. Alternatively the magneto-resistive device includes a non-magnetic layer arranged between first and second magnetic layers, wherein the non-magnetic layer has 10 to 50 weight percent of grains of a magnetic substance dispersed therein.Type: GrantFiled: September 7, 1995Date of Patent: October 6, 1998Assignee: Sanyo Electric Co., Ltd.Inventors: Atsushi Maeda, Satoru Oikawa, Toshio Tanuma, Minoru Kume, Kazuhiko Kuroki
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Patent number: 5680091Abstract: A magnetoresistive device includes a substrate and a magnetic film which is formed by alternately stacking magnetic and non-magnetic layers with each other on the substrate. The substrate is prepared to have a texture on its surface, and the magnetic film is formed on this substrate so that a texture is formed along the interface between the magnetic and non-magnetic layers. The texture can be an atomic level texture with step features dimensioned dependent upon the lattice constant, or may be an etched texture of features having desired dimensions in a specified range.Type: GrantFiled: September 7, 1995Date of Patent: October 21, 1997Assignee: Sanyo Electric Co., Ltd.Inventors: Atsushi Maeda, Toshio Tanuma, Minoru Kume, Kazuhiko Kuroki
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Patent number: 5604002Abstract: An optical recording medium includes a recording layer, and a masking layer which is converted to a state having small absorption at the wavelength of a reproducing beam due to progress of decoloration caused by a thermal reaction upon irradiation with the reproducing beam, or due to facilitation of decoloration caused by a photon mode photochromic reaction through temperature rise upon irradiation with the reproducing beam.Type: GrantFiled: March 21, 1995Date of Patent: February 18, 1997Assignee: Sanyo Electric Co., Ltd.Inventors: Tsuyoshi Tsujioka, Toshio Harada, Kazuhiko Kuroki, Fumio Tatezono
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Patent number: 5456988Abstract: An electroluminescent device having a hole injection electrode, an electron injection electrode, and at least an organic emitting layer therebetween, said organic emitting layer includes an 8-quinolinol derivative-metal complex whose ligand is selected from the group consisting of chemical formulas 102 through 106:chemical formula 102 ##STR1## chemical formula 103 ##STR2## chemical formula 104 ##STR3## chemical formula 105 ##STR4## chemical formula 106 ##STR5##Type: GrantFiled: February 1, 1993Date of Patent: October 10, 1995Assignee: Sanyo Electric Co., Ltd.Inventors: Takeshi Sano, Masayuki Fujita, Takanori Fujii, Yoshitaka Nishio, Yuji Hamada, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5432014Abstract: There is disclosed an electroluminescent (EL) element having an electron injection electrode, a hole injection electrode, and at least one layer therebetween, the layer comprising either a Rhodamine metal complex, a chromone metal complex, an azomethine metal complex, or another metal complex whose ligand is either thiobromine, flaviosin, or acriflavine.Type: GrantFiled: November 25, 1992Date of Patent: July 11, 1995Assignee: Sanyo Electric Co., Ltd.Inventors: Takeshi Sano, Masayuki Fujita, Takanori Fujii, Yoshitaka Nishio, Yuji Hamada, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5422612Abstract: In a dielectric filter according to the present invention, a depressed part is formed by removing a portion of an outer peripheral conductor on the open face side of each of a plurality of one-end face short-circuited type coaxial resonators or a portion of the outer peripheral conductor including a dielectric member. A dielectric substrate having a plurality of capacitance forming electrodes for forming antiresonance capacitances between the electrodes and inner peripheral conductors of the coaxial resonators formed thereon is mounted on the depressed part, and a reactance element for coupling the capacitance forming electrodes is provided on the dielectric substrate.Type: GrantFiled: September 22, 1993Date of Patent: June 6, 1995Assignee: Sanyo Electric Co., Ltd.Inventors: Yasumi Kobayashi, Kousuke Takeuchi, Kachio Ikeda, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5345202Abstract: In a dielectric filter according to the present invention, a depressed part is formed by removing a portion of an outer peripheral conductor on the open face side of each of a plurality of one-end face short-circuited type coaxial resonators or a portion of the outer peripheral conductor including a dielectric member. A dielectric substrate having a plurality of capacitance forming electrodes for forming antiresonance capacitances between the electrodes and inner peripheral conductors of the coaxial resonators formed thereon is mounted on the depressed part, and a reactance element for coupling the capacitance forming electrodes is provided on the dielectric substrate.Type: GrantFiled: September 22, 1993Date of Patent: September 6, 1994Assignee: Sanyo Electric Co., Ltd.Inventors: Yasumi Kobayashi, Kousuke Takeuchi, Kachio Ikeda, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5319342Abstract: A magnetic core (2) is formed so as to be vertically thin and segmentable into an upper segment (3) and a lower segment (4). An inner portion (2a) and two outer portions (2b), (2b) of the magnetic core (2) are interconnected so as to form a closed magnetic circuit. A substrate (9) is inserted between the two outer portions (2b), (2b), while the inner portion (2a) is inserted into a through hole (10) of the substrate (9). A scroll pattern coil (11) is formed on each of front surface (9a) and rear surface (9b) of the substrate (9) outside the through hole (10). Further, a bobbinless winding coil (13) is inserted into an annular space between the inner portion (2a) and the through hole (10).Type: GrantFiled: June 23, 1993Date of Patent: June 7, 1994Assignee: Kami Electronics Ind. Co., Ltd.Inventor: Kazuhiko Kuroki
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Patent number: 5309422Abstract: A light separating element designed to have parallel first and second external surfaces, a first polarizing film disposed on the first external surface and arranged to reflect a first portion of a first component in a first direction and transmit a second portion of the first component and all of a second component in a second direction. Further, a second polarizing film can be disposed on a second external surface which reflects a first portion of the second component in a third direction and transmits a second portion of the first and second components in a fourth direction. Further, the first portion of the second component is reflected by the second polarizing film to strike the first polarizing film. The first polarizing film transmitting a first portion of the second component in a fifth direction or a reflecting surface disposed on the second external surface and arranged to reflect a second portion of a first component and all of a second component in a third direction toward the polarizing film.Type: GrantFiled: June 2, 1992Date of Patent: May 3, 1994Assignee: Alps Electric Co., Ltd.Inventors: Kazuhiko Kuroki, Hiroshi Shiozaki
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Patent number: 5293141Abstract: In a dielectric filter according to the present invention, a depressed part is formed by removing a portion of an outer peripheral conductor on the open face side of each of a plurality of one-end face short-circuited type coaxial resonators or a portion of the outer peripheral conductor including a dielectric member. A dielectric substrate having a plurality of capacitance forming electrodes for forming antiresonance capacitances between the electrodes and inner peripheral conductors of the coaxial resonators formed thereon is mounted on the depressed part, and a reactance element for coupling the capacitance forming electrodes is provided on the dielectric substrate.Type: GrantFiled: March 18, 1992Date of Patent: March 8, 1994Assignee: Sanyo Electric Co., Ltd.Inventors: Yasumi Kobayashi, Kousuke Takeuchi, Kachio Ikeda, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5244851Abstract: A microwave ceramic composition containing as main components substances expressed by a composition formula of x.BaO - y TiO.sub.2 - z.Nd.sub.2 O.sub.3 (where 0.05<=x<=0.25, 0.60<=y<=0.85, and 0.05<=z<=0.225) when their molar fractions are taken as x, y and z (x+y+z=1) and containing as a subcomponent one type selected from the group consisting of In.sub.2 O.sub.3, Bi.sub.2 O.sub.5, GeO.sub.2 and V.sub.2 O.sub.5.Type: GrantFiled: February 21, 1992Date of Patent: September 14, 1993Assignee: Sanyo Electric Co., Ltd.Inventors: Hisakazu Takahashi, Yoko Baba, Kenichi Ezaki, Yasuhiko Okamoto, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5188993Abstract: A microwave dielectric ceramic composition which is obtained by selecting, in a composition formula of (A.sup.1+.sub.1/2 .multidot.B.sup.3+.sub.1/2) TiO.sub.3, Li.sup.1+ and Nd.sup.3+, Co.sup.3+ or Pr.sup.3+ as A.sup.1+ and B.sup.3+, respectively. The dielectric ceramic composition expressed by (A.sup.1+.sub.1/2 .multidot.B.sup.3+.sub.1/2) TiO.sub.3 has a high dielectric constant and has a temperature coefficient of resonance frequency .tau.f which is large on the minus side. MgO, CoO, ZnO, CaCO.sub.3 or SrCO.sub.3 is added to such a dielectric ceramic composition expressed by (A.sup.1+.sub.1/2 .multidot.B.sup.3+.sub.1/2 /TiO.sub.3, to improve the Q value of the dielectric ceramic composition.Type: GrantFiled: January 22, 1992Date of Patent: February 23, 1993Assignee: Sanyo Electric Co., Ltd.Inventors: Hisakazu Takahashi, Yoko Baba, Kenichi Ezaki, Yasuhiko Okamoto, Kenichi Shibata, Kazuhiko Kuroki, Shigeyuki Yasuyama
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Patent number: 5132258Abstract: A microwave dielectric ceramic composition containing as main components substances expressed by a composition formula of x.multidot.TiO.sub.2 -y.multidot.ZrO.sub.2 -z.multidot.SnO.sub.2 (where 0.30.ltoreq.x.ltoreq.0.60, 0.25.ltoreq.y.ltoreq.0.60, and 0.025.ltoreq.z.ltoreq.0.20) when their molar fractions are taken as x, y and z (x+y+z=1), and containing as additives predetermined amounts of one type selected from the group consisting of MnO, Al.sub.2 O.sub.3, CuO, Li.sub.2 O and Ga.sub.2 O.sub.3 and predetermined amounts of one type selected from the group consisting of Nb.sub.2 O.sub.5 and Ta.sub.2 O.sub.5.Type: GrantFiled: August 20, 1991Date of Patent: July 21, 1992Assignee: Sanyo Electric Co., Ltd.Inventors: Hisakazu Takahashi, Yoko Baba, Kenichi Ezaki, Yasuhiko Okamoto, Kenichi Shibata, Kazuhiko Kuroki
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Patent number: 5059847Abstract: A surface acoustic wave device comprising a single crystal silicon substrate and a piezoelectric thin film of single crystal or C-axis-oriented polycrystalline aluminum nitride formed on the surface of the substrate. The C-axis of the piezoelectric thin film is set in a direction in which the projection vector of the C-axis on a plane containing the axis of propagation direction of a surface acoustic wave and a normal axis of the substrate makes an inclination angle .theta. of up to 60 degrees with the axis of propagation direction, whereby the device is given a coupling coefficient of at least 2% is given as maximum coupling coefficient of the device.Type: GrantFiled: April 10, 1990Date of Patent: October 22, 1991Assignee: Sanyo Electric Co., Ltd.Inventors: Toshiharu Tanaka, Kenichi Shibata, Kousuke Takeuchi, Masakazu Sakata, Hiroshi Okano, Kazuhiko Kuroki
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Patent number: 5036199Abstract: A liquid crystal chopper comprising a pair of electrically conductive substrates, a spacer keeping the substrates so as to define a space between the substrates, and a liquid crystal of DSM type which is enclosed in the space, with a dielectric anisotropy of -0.5 or more and not exceeding 0. An infrared sensor using the liquid crystal chopper in the above construction as a chopper mechanism to intermittently interrupt infrared rays incident upon the pyroelectric element. The infrared sensor has a short response time at the liquid crystal chopper and consumes less power.Type: GrantFiled: February 20, 1990Date of Patent: July 30, 1991Assignee: Sanyo Electric Co., Ltd.Inventors: Masakazu Sakata, Kenichi Shibata, Kousuke Takeuchi, Toshiharu Tanaka, Hiroshi Okano, Toshikazu Tsujino, Kazuhiko Kuroki
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Patent number: 4997244Abstract: An optical wavelength converting device includes a substrate, and a waveguide layer of a nonlinear organic material formed on one major surface of the substrate and having a thickness tapered along one axis parallel to the major surface, in which a waveguide with a desired thickness can be selected in a direction normal to the axis.Type: GrantFiled: November 16, 1989Date of Patent: March 5, 1991Assignee: Sanyo Electric Co., Ltd.Inventors: Yoshitaka Nishio, Yuji Hamada, Takanori Fujii, Masakazu Sakata, Yoshikazu Tsujino, Kazuhiko Kuroki
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Patent number: 4989958Abstract: A focus adjusting apparatus comprises a focus lens device provided in an optical system. The focus lens device comprises a transparent container of a rectangular prism form, a lens member supported in the container and formed of poly(acrylic amide) gel as a polymer gel substance having electro-reactive deformability, and a pair of transparent electrodes, the container being filled with water-aceton mixture solution. The lens member is formed by two lens materials having different proportions of acrylic acid group. A voltage is applied to the transparent electrodes under control of an automatic focusing circuit to cause electric field in the container, whereby the lens member is deformed in a concentric spherical form to form a lens. When the application of the voltage is stopped, the lens member returns to the initial form. A focal distance of the lens member is changed according to degrees of such deformation of the lens member.Type: GrantFiled: November 2, 1988Date of Patent: February 5, 1991Assignee: Sanyo Electric Co., Ltd.Inventors: Yuji Hamada, Takanori Fujii, Masakazu Sakata, Yoshitaka Nishio, Yoshikazu Tsujino, Kazuhiko Kuroki, Yukinori Kuwano
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Patent number: 4950900Abstract: An infrared gas analyzer using a pyroelectric infrared sensor, which includes a heating unit for heating the infrared sensor, a heating sensor for detecting its heating temperature and a temperature sensor for detecting the ambient temperature of the infrared sensor, and controls the heating unit so as to retain the ambient temperature of the infrared sensor at a constant so that the output error is small irrespective of the change in ambient temperature.Type: GrantFiled: March 8, 1989Date of Patent: August 21, 1990Assignee: Sanyo Electric Co., Ltd.Inventors: Kousuke Takeuchi, Kenichi Shibata, Toshiharu Tanaka, Seiji Nishikawa, Kazuhiko Kuroki, Shoichi Nakano