Patents by Inventor Isao Fujiwara
Isao Fujiwara 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: 20150093625Abstract: A separator for a non-aqueous electrolyte secondary battery includes a first layer containing thermoplastic fibers, and a second layer formed on at least one side of the first layer and containing cellulose fibers as a main component. The first layer includes a mixed portion in which the thermoplastic fibers and the cellulose fibers are mixed, the mixed portion being disposed at an interface with the second layer. A total weight per area of the cellulose fibers contained in the second layer and the mixed portion is more than 5 g/m2 and 20 g/m2 or less.Type: ApplicationFiled: September 18, 2014Publication date: April 2, 2015Inventors: NOBUHIRO HIRANO, ISAO FUJIWARA, MASARU WATANABE
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Patent number: 8937696Abstract: A cellulose acylate film containing a cellulose acylate and a sugar ester compound having from 1 to 12 pyranose structures or furanose structures in which at least one hydroxyl group is esterified, the film satisfying 40 nm?Re(550)?60 nm and 100 nm?Rth(550)?140 nm, and having a dimensional change of ?0.5 to 0.5% and an internal haze of at most 0.1%.Type: GrantFiled: April 14, 2011Date of Patent: January 20, 2015Assignee: FUJIFILM CorporationInventors: Yoshiaki Hisakado, Jun Takeda, Isao Fujiwara, Masato Nagura, Nobutaka Fukagawa
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Patent number: 8836897Abstract: A liquid crystal display device comprising a liquid crystal cell and a polarizer arranged on at least one outer side of the liquid crystal cell, wherein the liquid crystal cell includes a pair of substrates at least one of which has an electrode and which are arranged oppositely to each other, and a liquid crystal layer sandwiched between the substrates, and at least one substrate includes at least three color pixels of B, G and R satisfying the following formula (1-1), and the polarizer includes a polarizing element and a film satisfying the following formula (1-2) and containing an optically-anisotropic layer: ?20 nm?{Rth[cell](630)?Rth[cell](440)}?28 nm,??(1-1) 1 nm<Re(630)?Re(440)?12 nm.??(1-2).Type: GrantFiled: April 13, 2012Date of Patent: September 16, 2014Assignee: FUJIFILM CorporationInventors: Jun Takeda, Makoto Ishiguro, Isao Fujiwara, Hirofumi Toyama, Yoji Ito
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Patent number: 8477275Abstract: An optical film contains a cellulose acylate film, and at least two layers of an optically anisotropic layer A and an optically anisotropic layer B, wherein the cellulose acylate film satisfies the specific formulae, Re(548) of the optically anisotropic layer A is from 80 to 190 nm and the slow axis of the optically anisotropic layer A is at 45°±10° with respect to the film conveying direction, and the optically anisotropic layer B satisfies the specific formulae.Type: GrantFiled: October 13, 2011Date of Patent: July 2, 2013Assignee: Fujifilm CorporationInventors: Hirofumi Toyama, Isao Fujiwara, Jun Takeda, Yoji Ito
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Publication number: 20120262651Abstract: A liquid crystal display device comprising a liquid crystal cell and a polarizer arranged on at least one outer side of the liquid crystal cell, wherein the liquid crystal cell includes a pair of substrates at least one of which has an electrode and which are arranged oppositely to each other, and a liquid crystal layer sandwiched between the substrates, and at least one substrate includes at least three color pixels of B, G and R satisfying the following formula (1-1), and the polarizer includes a polarizing element and a film satisfying the following formula (1-2) and containing an optically-anisotropic layer: ?20 nm?{Rth[cell](630)?Rth[cell](440)}?28 nm,??(1-1) 1 nm<Re(630)?Re(440)?12 nm.??(1-2).Type: ApplicationFiled: April 13, 2012Publication date: October 18, 2012Applicant: FUJIFILM CORPORATIONInventors: Jun TAKEDA, Makoto ISHIGURO, Isao FUJIWARA, Hirofumi TOYAMA, Yoji ITO
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Publication number: 20120092594Abstract: An optical film contains a cellulose acylate film, and at least two layers of an optically anisotropic layer A and an optically anisotropic layer B, wherein the cellulose acylate film satisfies the specific formulae, Re(548) of the optically anisotropic layer A is from 80 to 190 nm and the slow axis of the optically anisotropic layer A is at 45°±10° with respect to the film conveying direction, and the optically anisotropic layer B satisfies the specific formulae.Type: ApplicationFiled: October 13, 2011Publication date: April 19, 2012Applicant: FUJIFILM CORPORATIONInventors: Hirofumi TOYAMA, Isao FUJIWARA, Jun TAKEDA, Yoji ITO
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Publication number: 20110255037Abstract: A cellulose acylate film containing a cellulose acylate and a sugar ester compound having from 1 to 12 pyranose structures or furanose structures in which at least one hydroxyl group is esterified, the film satisfying 40 nm?Re(550)?60 nm and 100 nm?Rth(550)?140 nm, and having a dimensional change of ?0.5 to 0.5% and an internal haze of at most 0.1%.Type: ApplicationFiled: April 14, 2011Publication date: October 20, 2011Applicant: FUJIFILM CorporationInventors: Yoshiaki Hisakado, Jun Takeda, Isao Fujiwara, Masato Nagura, Nobutaka Fukagawa
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Patent number: 7928686Abstract: An electric motor control device includes a direct current power source; an inverter interposed between an electric motor and the direct current power source, the inverter device controlling an exchange of electric power therebetween; an inverter control unit that generates PWM pulses having a duty ratio corresponding to voltage command signals and sends the PWM pulses to the inverter in order to switch the inverter; a frequency changing unit that changes a carrier frequency of the PWM pulses generated by the inverter control unit in a manner corresponding to a frequency control signal; and a motor control unit.Type: GrantFiled: October 31, 2008Date of Patent: April 19, 2011Assignee: Aisin AW Co., Ltd.Inventors: Subrata Saha, Isao Fujiwara, Keisuke Nishimura, Kazuma Hasegawa, Yoshinori Oono, Seiichi Kinugasa
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Publication number: 20110052954Abstract: To provide an electrode plate capable of retaining a larger amount of active material and having a composite material layer uniform in thickness, a positive electrode plate (6) or a negative electrode plate (7) is formed by laminating a composite material layer (1) of the active material on a surface of a current collector plate (2) in strip form. A slope in a thickness direction (X/Z) of the end surfaces of the composite material layer (1) along the longer sides of the current collector plate (2) is “0<(X/Z)?1”.Type: ApplicationFiled: February 4, 2010Publication date: March 3, 2011Applicant: PANASONIC CORPORATIONInventors: Isao Fujiwara, Takao Kuromiya, Yasuhiro Ueyama
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Publication number: 20110045356Abstract: In a battery in which each of a positive electrode plate 4 and a negative electrode plate 8 is formed by coating a surface of a strip-shaped current collector 5, 9 with an active material layer 6, 10 and in which an electrode group 13 formed by winding or stacking the positive electrode plate 4 and the negative electrode plate 8 with a separator 2 interposed therebetween and an electrolyte are housed in a battery case 14, at least a predetermined portion of the separator 2 associated with either a coating start/terminal end 6a, 10a of the active material layer 6, 10 or an end of the current collector 5, 9 is formed as a modified physical-property portion 2a having a strength against a crush.Type: ApplicationFiled: May 20, 2009Publication date: February 24, 2011Inventors: Isao Fujiwara, Mikinari Shimada, Seiichi Kato
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Publication number: 20090191460Abstract: An object of the present invention is to provide a nonaqueous secondary battery with high capacity and less cycle degradation and a method for producing thereof. The nonaqueous secondary battery of the present invention comprises a positive electrode having a positive electrode current collector and a positive electrode mixture layer disposed on the positive electrode current collector, a negative electrode having a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector and a separator disposed between the positive electrode and the negative electrode, wherein the positive electrode mixture layer or the negative electrode mixture layer contains active material particles and a particulate binder adhered to the surface of the active material particles.Type: ApplicationFiled: December 30, 2008Publication date: July 30, 2009Applicant: PANASONIC CORPORATIONInventors: Isao FUJIWARA, Yasuhiro UEYAMA, Takao KUROMIYA
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Publication number: 20090115362Abstract: An electric motor control device includes a direct current power source; an inverter interposed between an electric motor and the direct current power source, the inverter device controlling an exchange of electric power therebetween; an inverter control unit that generates PWM pulses having a duty ratio corresponding to voltage command signals and sends the PWM pulses to the inverter in order to switch the inverter; a frequency changing unit that changes a carrier frequency of the PWM pulses generated by the inverter control unit in a manner corresponding to a frequency control signal; and a motor control unit.Type: ApplicationFiled: October 31, 2008Publication date: May 7, 2009Applicant: AISIN AW CO., LTD.Inventors: Subrata Saha, Isao Fujiwara, Keisuke Nishimura, Kazuma Hasegawa, Yoshinori Oono, Seiichi Kinugasa
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Patent number: 7489099Abstract: An electric drive control apparatus and method calculates a current command value based on an electric machine target torque that represents a target value of a torque of an electric machine; calculates a current deviation between the current command value and a current applied to the electric machine; calculates a first inductance and a second inductance that each have a different amount of change caused by a change in the current; calculates an interference term based on the first inductance; calculates a proportional term and an integral term based on the current deviation and the second inductance; and calculates a voltage command value based on the interference term, the proportional term and the integral term.Type: GrantFiled: March 26, 2007Date of Patent: February 10, 2009Assignee: Aisin AW Co., Ltd.Inventors: Isao Fujiwara, Zhiqian Chen
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Patent number: 7460353Abstract: A high-voltage capacitor is intended for use in a high-voltage capacitor device having at least two through conductors. The high-voltage capacitor includes a dielectric porcelain, an individual electrode, and a common electrode. At least two spaced individual electrodes are provided on one surface of the dielectric porcelain and intended to be connected one-to-one to the through conductors positioned outside the dielectric porcelain. The common electrode is provided on the other surface of the dielectric porcelain.Type: GrantFiled: March 23, 2006Date of Patent: December 2, 2008Assignee: TDK CorporationInventors: Yukihiko Shirakawa, Tsukasa Sato, Isao Fujiwara, Hisashi Tanaka
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Patent number: 7339333Abstract: A general-purpose comparator can be used as a comparison processing module to reduce the costs of a motor drive control apparatus. The apparatus has an electric machine; a magnetic pole position computation processing module; a pattern generation processing module; a switching angle computation processing module which computes a switching angle where switching is done in a next control period based on a pulse pattern; a comparison processing module which compares the magnetic pole position with the computed switching angle to generate a comparison signal; and an on-off output processing module which generates a PWM signal based on the comparison signal indicative of the comparison result. In this case, because the magnetic pole position is compared with the computed switching angle to generate the PWM signal based on the comparison signal, a general-purpose comparator can be used as the comparison processing module.Type: GrantFiled: July 22, 2005Date of Patent: March 4, 2008Assignee: Aisin AW Co., Ltd.Inventors: Zhiqian Chen, Isao Fujiwara
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Publication number: 20070241715Abstract: An electric drive control apparatus and method calculates a current command value based on an electric machine target torque that represents a target value of a torque of an electric machine; calculates a current deviation between the current command value and a current applied to the electric machine; calculates a first inductance and a second inductance that each have a different amount of change caused by a change in the current; calculates an interference term based on the first inductance; calculates a proportional term and an integral term based on the current deviation and the second inductance; and calculates a voltage command value based on the interference term, the proportional term and the integral term.Type: ApplicationFiled: March 26, 2007Publication date: October 18, 2007Applicant: AISIN AW CO., LTD.Inventors: Isao Fujiwara, Zhiqian Chen
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Publication number: 20070139782Abstract: An anti-reflection film which includes a transparent substrate, a diffusion layer and a low refractive index layer in this order, wherein the diffusion layer shows such a scattered light profile measured by a goniophotometer that a ratio of an intensity of scattered light at an angle of 30° to an intensity of transmitted light at an angle of 0° is 0.01 to 0.2%, and wherein an average mirror reflectance of incident light at an angle of 5° is not more than 2.5% in the wavelength region of 450 to 650 nm.Type: ApplicationFiled: February 13, 2007Publication date: June 21, 2007Inventors: Yoji Ito, Isao Fujiwara, Takumi Ando
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Patent number: 7190525Abstract: A diffusion film includes a transparent substrate and a diffusion layer. The diffusion layer shows a specific scattered light profile measured by a goniophotometer. In the scattered light profile, a ratio of an intensity of scattered light at an angle of 30° to an intensity of transmitted light at an angle of 0° is 0.01 to 0.2%.Type: GrantFiled: October 11, 2002Date of Patent: March 13, 2007Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoji Ito, Isao Fujiwara, Takumi Ando
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Publication number: 20070047174Abstract: A high-voltage feed-through capacitor includes: a capacitor element; a grounding metal fitting; an insulating resin; two through conductors; an insulating cover; and an insulating tube. The capacitor element has two separate electrodes on one side and one common electrode on the other side and is mounted on one side of the grounding metal fitting with the common electrode being connected to the same side of the grounding metal fitting. The insulating resin fills a space inside the capacitor element. Each through conductor has a rod-like conductor portion passing through the grounding metal fitting and the capacitor element and connected to the separate electrode. At least a portion of the insulating tube is attached to the rod-like conductor portion within the capacitor element. The insulating cover is attached to the rod-like conductor portion to have one end thereof in contact with one end of the insulating tube.Type: ApplicationFiled: June 1, 2006Publication date: March 1, 2007Applicant: TDK CorporationInventors: Tsukasa Sato, Yukihiko Shirakawa, Isao Fujiwara, Hisashi Tanaka
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Patent number: 7184256Abstract: A high-voltage feed-through capacitor includes: a capacitor element; a grounding metal fitting; an insulating resin; two through conductors; an insulating cover; and an insulating tube. The capacitor element has two separate electrodes on one side and one common electrode on the other side and is mounted on one side of the grounding metal fitting with the common electrode being connected to the same side of the grounding metal fitting. The insulating resin fills a space inside the capacitor element. Each through conductor has a rod-like conductor portion passing through the grounding metal fitting and the capacitor element and connected to the separate electrode. At least a portion of the insulating tube is attached to the rod-like conductor portion within the capacitor element. The insulating cover is attached to the rod-like conductor portion to have one end thereof in contact with one end of the insulating tube.Type: GrantFiled: June 1, 2006Date of Patent: February 27, 2007Assignee: TDK CorporationInventors: Tsukasa Sato, Yukihiko Shirakawa, Isao Fujiwara, Hisashi Tanaka