Patents by Inventor Masahiro Yanagisawa
Masahiro Yanagisawa 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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Publication number: 20110222139Abstract: An electrochromic display apparatus is disclosed that includes a stacked body which includes a display electrode and an electrochromic layer that are stacked on each other; a film which includes through holes, and is disposed on one of the display electrode and the electrochromic layer of the stacked body; and an opposed substrate on which an opposed electrode that faces toward the display electrode is formed.Type: ApplicationFiled: March 11, 2011Publication date: September 15, 2011Applicant: RICOH COMPANY, LTD.,Inventors: Yoshihisa NAIJO, Tohru Yashiro, Shigenobu Hirano, Masahiro Yanagisawa, Masahiro Masuzawa, Akishige Murakami, Hiroyuki Takahashi, Koh Fujimura, Yoshinori Okada
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Publication number: 20110134508Abstract: An electrophoretic liquid is disclosed that includes first particles that have the property of scattering light over an entire visible range and are positively or negatively charged; second particles that have the property of absorbing light of a specific wavelength range in the visible range and scattering light of ranges other than the specific wavelength range and are charged to a polarity opposite to that of the first particles; and a dispersion medium that has the property of allowing the light of the specific wavelength range absorbed by the second particles to pass through and absorbing the light of the ranges other than the specific wavelength range. In the electrophoretic liquid, the first particles and the second particles are dispersed in the dispersion medium.Type: ApplicationFiled: August 4, 2009Publication date: June 9, 2011Inventors: Ikue Kawashima, Masahiro Masuzawa, Masahiro Yanagisawa, Yoshihisa Naijo
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Patent number: 7952791Abstract: Disclosed is an electrophoretic particle comprising a polymer component on a surface thereof which polymer component is a copolymer obtained from materials comprising at least a monomer component represented by a following general formula (I): wherein R represents a hydrogen atom or a methyl group, and a monomer component represented by a following general formula (II): wherein R1 represents a hydrogen atom or a methyl group, R1, represents a hydrogen atom or an alkyl group whose carbon number is 1 to 4, n represents a natural number, and x represents an integer of 1 to 3.Type: GrantFiled: May 9, 2008Date of Patent: May 31, 2011Assignee: Ricoh Company, Ltd.Inventors: Masahiro Yanagisawa, Yoshihisa Naijo
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Publication number: 20110064355Abstract: Excess optical power in a waveguide device is appropriately terminated. According to one embodiment of the present invention, the waveguide device comprises a termination structure filled with a light blocking material for terminating light from the end section of a waveguide. This termination structure can be formed by forming a groove on an optical waveguide by removing the clad and core, and filling the inside of that groove with a material attenuating the intensity of the light (light blocking material). In this manner, light that enters into the termination structure is attenuated by the light blocking material, and influence on other optical devices as a crosstalk component can be suppressed. With such termination structure, not only the influence on optical devices integrated on the same substrate, but also the influence on other optical devices directly connected to that substrate can be suppressed.Type: ApplicationFiled: May 26, 2009Publication date: March 17, 2011Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NTT ELECTRONICS CORPORATIONInventors: Shunichi Soma, Takashi Goh, Yasuaki Hashizume, Masahiro Yanagisawa, Takanori Ishikawa, Mitsuru Nagano, Atsushi Murasawa, Masayuki Okuno
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Publication number: 20110051142Abstract: There is provided a novel optical sensor utilizing a surface plasmon resonance technique which is capable of detecting a substance to be detected with high sensitivity independently of a wavelength of irradiated light and is capable of obtaining information, other than a refraction index, on the substance to be detected. At the center of a surface of a metallic film 2 which is formed on a substrate and has no aperture, a circular depression 4 with a diameter of 0.1 to 250 nm is formed and with the depression 4 defined as a center, a plurality of depressions 3 are concentrically formed at intervals of 450 to 530 nm.Type: ApplicationFiled: March 17, 2009Publication date: March 3, 2011Applicant: Waseda UniversityInventors: Masahiro Yanagisawa, Takuya Nakanishi, Naonobu Shimamoto, Mikiko Saito, Tetsuya Osaka
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Patent number: 7880955Abstract: An electrophoretic dispersion solution includes a nonpolar solvent and plural kinds of electrophoretic particles. At least one kind of the electrophoretic particles has, on surfaces, a copolymer including a first monomer that has a charged group and a second monomer expressed by a first formula represented as R denotes a hydrogen atom or a methyl group, R? denotes a hydrogen atom or an alkyl group with a carbon number of 1 through 4, n is a natural number, and x denotes an integer of 1 through 3. At least another kind of the electrophoretic particles include, on surfaces, a polymer including a third monomer expressed by a second formula represented as a component of the polymer. R denotes a hydrogen atom or a methyl group and R?? denotes an alkyl group with a carbon number of 4 or larger.Type: GrantFiled: June 12, 2009Date of Patent: February 1, 2011Assignee: Ricoh Company, Ltd.Inventors: Yoshihisa Naijo, Masahiro Yanagisawa
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Patent number: 7856163Abstract: A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.Type: GrantFiled: August 1, 2005Date of Patent: December 21, 2010Assignee: Nippon Telegraph and Telephone CorporationInventors: Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi, Masahiro Yanagisawa, Senichi Suzuki, Yasuhiro Hida, Motohaya Ishii, Munehisa Tamura
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Publication number: 20100274541Abstract: A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.Type: ApplicationFiled: July 12, 2010Publication date: October 28, 2010Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi, Masahiro Yanagisawa, Senichi Suzuki, Yasuhiro Hida, Motohaya Ishii, Munehisa Tamura
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Publication number: 20100002287Abstract: An electrophoretic dispersion solution includes a nonpolar solvent and plural kinds of electrophoretic particles. At least one kind of the electrophoretic particles has, on surfaces, a copolymer including a first monomer that has a charged group and a second monomer expressed by a first formula represented as R denotes a hydrogen atom or a methyl group, R? denotes a hydrogen atom or an alkyl group with a carbon number of 1 through 4, n is a natural number, and x denotes an integer of 1 through 3. At least another kind of the electrophoretic particles include, on surfaces, a polymer including a third monomer expressed by a second formula represented as as a component of the polymer. R denotes a hydrogen atom or a methyl group and R? denotes an alkyl group with a carbon number of 4 or larger.Type: ApplicationFiled: June 12, 2009Publication date: January 7, 2010Applicant: RICOH COMPANY, LTD.Inventors: Yoshihisa NAIJO, Masahiro Yanagisawa
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Patent number: 7580597Abstract: The present invention provides an optical functional circuit where a holographic wave propagation medium is applied and a circuit property is excellent such as small transmission loss and crosstalk. The optical functional circuit where a plurality of circuit elements are formed on a substrate includes the wave propagation medium for converting an optical path of a leakage light so that the leakage light that is not emitted from a predetermined output port of the circuit element is not coupled to a different circuit element. This wave propagation medium is constituted by an optical waveguide that is provided with a clad layer formed on the substrate and a core embedded in the clad layer, and a part of the optical waveguide is formed in accordance with a refractive index distribution which is multiple scattered.Type: GrantFiled: July 1, 2005Date of Patent: August 25, 2009Assignee: Nippon Telegraph and Telephone CorporationInventors: Tsutomu Kitoh, Yohei Sakamaki, Toshikazu Hashimoto, Takashi Saida, Hiroshi Takahashi, Masahiro Yanagisawa, Ikuo Ogawa, Tomohiro Shibata, Senichi Suzuki
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Publication number: 20090207476Abstract: Disclosed is an electrophoretic particle comprising a polymer component on a surface thereof which polymer component is a copolymer obtained from materials comprising at least a monomer component represented by a following general formula (I): wherein R represents a hydrogen atom or a methyl group, and a monomer component represented by a following general formula (II): wherein R1 represents a hydrogen atom or a methyl group, R1? represents a hydrogen atom or an alkyl group whose carbon number is 1 to 4, n represents a natural number, and x represents an integer of 1 to 3.Type: ApplicationFiled: May 9, 2008Publication date: August 20, 2009Inventors: Masahiro Yanagisawa, Yoshihisa Naijo
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Publication number: 20090109145Abstract: When not receiving the next display-switch starting signal even after a specified time elapses from the application of a previous display driving voltage, a driving unit applies another preparatory driving voltage for generating a preparatory electric field capable of improving the response of colored particles to a driving electric field to an extent so as not to change the arrangement of the colored particles between pixel electrodes and a transparent electrode for a preparatory driving time.Type: ApplicationFiled: October 28, 2008Publication date: April 30, 2009Inventors: Atsushi Okada, Masahiro Yanagisawa, Yoshihisa Naijo
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Publication number: 20080273829Abstract: A planar lightwave circuit is provided which can be easily fabricated by an existing planar-lightwave-circuit fabrication process, which can lower the propagation loss of signal light and which can convert inputted signal light so as to derive desired signal light. A planar lightwave circuit having a core and a clad which are formed on a substrate, has input optical waveguide(s) (111) which inputs signal light, mode coupling part (112) for coupling a fundamental mode of the inputted signal light to a higher-order mode and/or a radiation mode, or mode re-coupling part (113) for re-coupling the higher-order mode and/or the radiation mode to the fundamental mode, and output optical waveguide(s) (114) which outputs signal light. The mode coupling part or the mode re-coupling part is an optical waveguide which has core width and/or height varied continuously.Type: ApplicationFiled: August 1, 2005Publication date: November 6, 2008Applicant: Nippon Telegraph and Telephone CorporationInventors: Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi, Masahiro Yanagisawa, Senichi Suzuki, Yasuhiro Hida, Motohaya Ishii, Munehisa Tamura
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Publication number: 20080232736Abstract: The present invention provides an optical functional circuit where a holographic wave propagation medium is applied and a circuit property is excellent such as small transmission loss and crosstalk. The optical functional circuit where a plurality of circuit elements are formed on a substrate includes the wave propagation medium for converting an optical path of a leakage light so that the leakage light that is not emitted from a predetermined output port of the circuit element is not coupled to a different circuit element. This wave propagation medium is constituted by an optical waveguide that is provided with a clad layer formed on the substrate and a core embedded in the clad layer, and a part of the optical waveguide is formed in accordance with a refractive index distribution which is multiple scattered.Type: ApplicationFiled: July 1, 2005Publication date: September 25, 2008Applicant: Nippon Telegraph and Telephone CorporationInventors: Tsutomu Kitoh, Yohei Sakamaki, Toshikazu Hashimoto, Takashi Saida, Hiroshi Takahashi, Masahiro Yanagisawa, Ikuo Ogawa, Tomohiro Shibata, Senichi Suzuki
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Publication number: 20080193769Abstract: An object of the present invention is to provide white colored fine particles with high white reflectance and not easily precipitating in a dispersion medium compared to inorganic white pigments, a method of producing the fine particles, an image display medium and an image display apparatus having a high whiteness like a paper and an excellent display memorability using the fine particles. Therefore, the fine particles contain a polymer of a compound expressed by the following formula (1). In the above formula (1), R represents a hydrogen atom, a halogen atom, an alkyl group or an alkenyl group, “m” represents an integer of 1 to 10, and at least one of R represents the alkenyl group.Type: ApplicationFiled: August 30, 2005Publication date: August 14, 2008Inventors: Masahiro Yanagisawa, Seigou Kawaguchi
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Patent number: 7397977Abstract: A wave transmission medium includes an input port 3-1 and an output port 3-2. A field distribution 1 and a field distribution 2 are obtained by numerical calculations. The field distribution 1 is a field distribution of the propagation light (forward propagation light) launched into the input port 3-1. The field distribution 2 is a field distribution of the phase conjugate light (reverse propagation light) resulting from reversely transmitting from the output port side an output field that is expected to be output from the output port 3-2 when an optical signal is launched into the input port 3-1. According to the field distributions 1 and 2, a spatial refractive index distribution is calculated such that the phase difference between the propagation light and reverse propagation light is eliminated at individual points (x, z) in the medium.Type: GrantFiled: December 25, 2003Date of Patent: July 8, 2008Assignee: Nippon Telegraph and Telephone CorporationInventors: Toshikazu Hashimoto, Ikuo Ogawa, Takeshi Kitagawa, Senichi Suzuki, Masahiro Yanagisawa, Tomohiro Shibata, Masaki Koutoku, Hiroshi Takahashi, Ryou Nagase, Masaru Kobayashi, Shuichiro Asakawa, Yoshiteru Abe, Tsutomu Kitoh, Takaharu Ohyama
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Patent number: 7313297Abstract: Disclosed is a wavelength multi/demultiplexer for separating two wavelength bands with a narrow wavelength spacing. A dielectric multilayer filter is provided in an intersection portion where two optical waveguides intersect each other and separates incident light to the dielectric multilayer filter to transmitted light and reflected light. Here, the distance X from the multilayer surface on the light-incident side of the dielectric multilayer to the central intersection point of the two intersecting optical waveguides is arranged to satisfy 0?X?d/2 (where “d” represents the thickness of the dielectric multilayer). With this configuration, a multi/demultiplexer can be realized that shows good wavelength response without spectral degradation even for two wavelengths having narrow wavelength spacing.Type: GrantFiled: September 10, 2004Date of Patent: December 25, 2007Assignee: Nippon Telegraph and Telephone CorporationInventors: Masahiro Yanagisawa, Taisuke Oguchi, Yasuyuki Inoue, Yoshinori Hibino, Yasuhiro Hida, Motohaya Ishii
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Patent number: 7189415Abstract: The present invention relates to a pharmaceutical composition useful for rapid disintegration, which comprises a sparingly soluble medicament held on a gel-forming water-soluble polymer as a solid dispersion, wherein it contains a salt substance that comprises an alkali and a weak or strong acid and has an endothermic standard enthalpy of solution or heat of solution. Since rapid disintegration of the pharmaceutical composition of the present invention and rapid dissolution of the medicament contained in the preparation can be made in the digestive tracts pH-independently, good bioavailability can be attained.Type: GrantFiled: November 30, 2004Date of Patent: March 13, 2007Assignee: Astellas Pharma Inc.Inventors: Hirokazu Takagi, Atsushi Kajiyama, Masahiro Yanagisawa
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Publication number: 20070014856Abstract: The present invention relates to a pharmaceutical composition useful for rapid disintegration, which comprises a sparingly soluble medicament held on a gel-forming water-soluble polymer as a solid dispersion, wherein it contains a salt substance that comprises an alkali and a weak or strong acid and has an endothermic standard enthalpy of solution or heat of solution. Since rapid disintegration of the pharmaceutical composition of the present invention and rapid dissolution of the medicament contained in the preparation can be made in the digestive tracts pH-independently, good bioavailability can be attained.Type: ApplicationFiled: September 19, 2006Publication date: January 18, 2007Inventors: Hirokazu Takagi, Atsushi Kajiyama, Masahiro Yanagisawa
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Patent number: 7082671Abstract: A recording/reproduction element is mounted on a magnetic head slider via a piezoelectric element so that a displacement of the piezoelectric element performs fine control of the position of the recording/reproduction, thus enabling fine spacing and high track positioning accuracy. This improves linear recording density and track density. A pair of electrodes are formed on both sides of a piezoelectric element to constitute a piezoelectric actuator. One electrode is arranged opposite the rear surface (air flow out end) of a magnetic head slider 11. A recording/reproduction element is arranged on and electrically insulated from the other electrode. The piezoelectric element includes a piezoelectric element displaced in a spacing direction, enabling fine spacing control, a piezoelectric element displaced in the track direction, enabling fine track position control, and a piezoelectric element displaced in a magnetic disc rotation direction, enabling reduction of jitter of a reproduction signal.Type: GrantFiled: June 24, 2004Date of Patent: August 1, 2006Assignee: TDK CorporationInventor: Masahiro Yanagisawa