Patents by Inventor Izuru Shinjo
Izuru Shinjo 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: 6630821Abstract: A magnetic detection device capable of detecting moving direction of a toothed magnetic movement body is provided. The magnetic detection device comprises a circuit for converting output signals of plural magneto-resistance effect elements 21 and 22 located in moving direction of toothed magnetic movable body to a ternary signal of a high level, a low level 1 and a low level 2, and in which a binary signal of the high level and the low level 1 is output when the toothed magnetic movement body is rotated in forward direction and a binary signal of the high level and the low level 2 is output when the toothed magnetic movement body is rotated in reverse direction.Type: GrantFiled: March 8, 2001Date of Patent: October 7, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Hiroshi Sakanoue, Naoki Hiraoka
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Patent number: 6577122Abstract: A magnetic detection apparatus is able to ensure good performance in detecting the position of an detected portion even with a shift or displacement in the position of a magnetoelectric conversion element. The magnetic detection apparatus includes at least one magnetoelectric conversion element 15 disposed to face one of teeth 12a and grooves 12b of a rotating member 11, a magnet 14 with a direction of magnetization thereof oriented in a direction perpendicular to a radial direction of the rotating member 11 in which the magnet 14 faces the rotating member 11, and a magnetic guide 21 having a first pole projection 21a and a second pole projection 21b formed in a spaced apart relation with respect to each other in a radial direction of the magnetic moving object in which the magnetic guide 21 faces one of the teeth 21a and the grooves 21b of the rotating member 11.Type: GrantFiled: July 12, 2001Date of Patent: June 10, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiro Yokotani, Izuru Shinjo, Takuji Nada, Tatsuya Fukami
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Patent number: 6528992Abstract: A magnetic detector for detecting a rotational angle of a gear-like rotary member of magnet material generates twice as many pulses as the number of projected or recessed portions of the rotary member of magnetic material. The magnetic detector comprises a magnet for generating a magnetic field, a rotary member of magnetic material disposed with a predetermined gap retaining relative to the magnet, and an magnetic field sensing device for detecting changes in the magnetic field by movement of the moving member of magnetic material. The magnetic field sensing device is disposed relative to the magnet so that a center axis of the magnetic field sensing device is aligned with a center axis of the magnet wherein a magnetic field acting on the magnetic field sensing device changes from positive to negative and from negative to positive with the movement of the moving member of magnetic material.Type: GrantFiled: October 9, 1998Date of Patent: March 4, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Yasuyoshi Hatazawa, Takuji Nada, Masahiro Yokotani
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Publication number: 20020153881Abstract: A magnetic field sensing element comprises an underlayer formed on a substrate, a giant magnetoresistance element formed on the underlayer for detecting a change in a magnetic field, and an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in a magnetic field detected by the giant magnetoresistance element, wherein the giant magnetoresistance element and the integrated circuit are formed on the same surface.Type: ApplicationFiled: June 5, 2002Publication date: October 24, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka, Yasuyoshi Hatazawa
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Patent number: 6427316Abstract: A method of manufacturing a rotation sensor is provided. In the method, an insert conductor having a predetermined shape and having at least a connector terminal and a conversion device terminal is provided. The insert conductor is insert-molded in a resin base such that at least the connector terminal and the conversion device terminal of the insert conductor remain exposed from the resin base. A resin connector part is molded such that the resin connector part encircles the connector terminal. Also, a magnetoelectric conversion device is connected to the conversion device terminal of the insert conductor, and positioning parts are provided at a tip of the resin base. In addition, the magnetoelectric conversion device is sandwiched between the positioning parts to securely hold the magnetoelectric conversion device, and a press fit part is formed at the tip of the resin base.Type: GrantFiled: November 2, 1999Date of Patent: August 6, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Noriaki Hayashi, Naoki Hiraoka, Wataru Fukui, Yutaka Ohashi
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Publication number: 20020101233Abstract: A magnetic detection apparatus is able to ensure good performance in detecting the position of an detected portion even with a shift or displacement in the position of a magnetoelectric conversion element. The magnetic detection apparatus includes at least one magnetoelectric conversion element 15 disposed to face one of teeth 12a and grooves 12b of a rotating member 11, a magnet 14 with a direction of magnetization thereof oriented in a direction perpendicular to a radial direction of the rotating member 11 in which the magnet 14 faces the rotating member 11, and a magnetic guide 21 having a first pole projection 21a and a second pole projection 21b formed in a spaced apart relation with respect to each other in a radial direction of the magnetic moving object in which the magnetic guide 21 faces one of the teeth 21a and the grooves 21b of the rotating member 11.Type: ApplicationFiled: July 12, 2001Publication date: August 1, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Masahiro Yokotani, Izuru Shinjo, Takuji Nada, Tatsuya Fukami
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Patent number: 6426620Abstract: A magnetic field sensing element comprises an underlayer formed on a substrate, a giant magnetoresistance element formed on the underlayer for detecting a change in a magnetic field, and an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in a magnetic field detected by the giant magnetoresistance element, wherein the giant magnetoresistance element and the integrated circuit are formed on the same surface.Type: GrantFiled: May 10, 1999Date of Patent: July 30, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka, Yasuyoshi Hatazawa
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Patent number: 6392407Abstract: In a rotation angle detecting device, a circuit scale thereof is reduced and a manufacturing cost thereof is lowered.Type: GrantFiled: November 28, 2001Date of Patent: May 21, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Naohiro Mishiro, Izuru Shinjo, Masahiro Yokotani
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Publication number: 20020030487Abstract: A magnetic detection device capable of detecting moving direction of a toothed magnetic movement body is provided.Type: ApplicationFiled: March 8, 2001Publication date: March 14, 2002Inventors: Izuru Shinjo, Hiroshi Sakanoue, Naoki Hiraoka
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Patent number: 6339324Abstract: The invention provides a magnetic object motion sensor which can operate with high accuracy not only when a magnetic object moves at high speeds but also even when it moves at low speeds, which can be produced with a greater production tolerance and a greater dimensional tolerance.Type: GrantFiled: September 11, 2000Date of Patent: January 15, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Sakanoue, Noriaki Hayashi, Izuru Shinjo, Naoki Hiraoka, Wataru Fukui, Yutaka Ohashi
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Patent number: 6326779Abstract: A magnetic detector having high productivity is provided by producing a connector and a base as separate units, electrically interconnecting them, forming a cut-out portion in a press-in portion of the base, and injecting a thermosetting resin adhesive into a whole case. The case also has a recess portion that prevents excess injected resin from leaking to the outside of the case. The structure of the base also allows for easier injection of resin and simplified connection of the magnetic resistance element to the base.Type: GrantFiled: October 14, 1998Date of Patent: December 4, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Takuji Nada, Yasuyoshi Hatazawa, Naoki Hiraoka
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Publication number: 20010045827Abstract: A magnetic detector is disclosed which can output pulses as many as twice the number of projected or recessed portions of a rotary member of magnetic material. The magnetic detector comprises a magnet for generating a magnetic field, a rotary member of magnetic material disposed with a predetermined gap retaining relative to the magnet and being able to change the magnetic field generated by the magnet, and an in-plane-sensitive magnetic field sensing device for detecting changes in the magnetic field by movement of the moving member of magnetic material. The magnetic field sensing device is arranged in a region where a magnetic field acting on the magnetic field sensing device changes from positive to negative and from negative to positive with the movement of the moving member of magnetic material.Type: ApplicationFiled: October 9, 1998Publication date: November 29, 2001Inventors: IZURU SHINJO, YASUYOSHI HATAZAWA, TAKUJI NADA, MASAHIRO YOKOTANI
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Patent number: 6323644Abstract: The present invention improves the sensitivity and expands the temperature range of operation of a magnetic detection device used in conjunction with rotary shafts such as those found in automobiles. A magnetic detection element consists of a giant magnetoresistance element and an integrated circuit for performing a predetermined operational processing based on the variation of magnetic field detected by the giant magnetoresistance element, and the magnetic detection element is operated in the magnetic field in the range of exceeding the magnetic field for maximizing the resistance value of the giant magnetoresistance element and below the field obtained by multiplying the saturation magnetic field of the giant magnetoresistance element by 0.8.Type: GrantFiled: October 22, 1999Date of Patent: November 27, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Ikuya Kawakita
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Patent number: 6255811Abstract: A magnetic detector to detect a magnetic object's rotation and movement using a magnetoresistive element having hysteresis. The magnetoresistive element is set so as to tilt from the magnetizing direction of a magnet up to a predetermined angle &thgr; between the rotational magnetic object to be detected and the magnet. The magnetic detector provides a high accuracy signal that corresponds to the distance between the rotational magnetic object to be detected and the magnetoresistive element. The signal obtained is independent of the rotational direction or rotational speed of the magnetic object to be detected or the atmospheric temperature of an apparatus. Moreover, the temperature dependency of the output signal (amplitude) of the magnetoresistive element is decreased.Type: GrantFiled: August 11, 1997Date of Patent: July 3, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yasuyoshi Hatazawa, Izuru Shinjo, Wataru Fukui
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Patent number: 6246234Abstract: Disclosed is a magnetic detector in which a GMR device is operated within the limited range of a magnetic field so as to optimize a temperature characteristic of changes in resistance value and to improve noise resistance. The magnetic detector comprises a magnet (4) for generating a magnetic field, a rotary member (2) of magnetic material arranged with a predetermined gap left relative to the magnet and provided with projections capable of changing the magnetic field generated by the magnet, and a giant magnetoresistance device (3) of which resistance value is changed depending on the magnetic field changed by the rotary member of magnetic material. The giant magnetoresistance device is arranged to have such a predetermined gap relative to the magnet that the giant magnetoresistance device operates under a magnetic field applied to change in a predetermined amplitude range, e.g.Type: GrantFiled: October 20, 1998Date of Patent: June 12, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiro Yokotani, Izuru Shinjo, Yasuyoshi Hatazawa
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Patent number: 6239595Abstract: A magnetic field sensing element comprises an underlayer formed on a substrate, a giant magnetic resistance element formed on the underlayer for detecting a change in a magnetic field, and an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in a magnetic field detected by the giant magnetic resistance element, wherein the giant magnetic resistance element and the integrated circuit are formed on the same surface.Type: GrantFiled: November 19, 1998Date of Patent: May 29, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Yasuyoshi Hatazawa, Tatsuya Fukami, Motohisa Taguchi, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka
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Patent number: 6211669Abstract: Disclosed is a magnetic detector in which a GMR device is operated within the limited range of a magnetic field so as to optimize changes in resistance value of the GMR device and to improve noise resistance. The magnetic detector comprises a magnet (4) for generating a magnetic field, a rotary member (2) of magnetic material arranged with a predetermined gap left relative to the magnet and provided with projections capable of changing the magnetic field generated by the magnet, and a giant magnetoresistance device (3) of which resistance value is changed depending on the magnetic field changed by the rotary member of magnetic material. The giant magnetoresistance device is arranged in such a position with a predetermined gap relative to the magnetic field generating means that the giant magnetoresistance device is subject to a bias magnetic field applied with the intensity of magnetic field in a predetermined range, e.g.Type: GrantFiled: October 20, 1998Date of Patent: April 3, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiro Yokotani, Izuru Shinjo, Yasuyoshi Hatazawa, Naoki Hiraoka
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Patent number: 6204662Abstract: A magnetic field sensing element comprising a giant magnetic resistance element formed on a substrate for detecting a change in a magnetic field, an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in the magnetic field, and an input side protective resistor and an output side protective resistor provided on the input side and the output side, respectively, of the integrated circuit, wherein the metal film from which the input side resistor and the output side resistor are formed is identical to the metal film from which the integrated circuit is formed.Type: GrantFiled: October 21, 1998Date of Patent: March 20, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Yasuyoshi Hatazawa, Takuji Nada, Masahiro Yokotani
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Patent number: 6194893Abstract: A magnetic detector is disclosed with a power-on function which can essentially eliminate temperature characteristics of a magnetic field sensing device and improve edge detecting accuracy of alternately projected and recessed portions of a moving member of magnetic material. The magnetic detector comprises a magnet for generating a magnetic field, a rotary member of magnetic material disposed with a predetermined gap remaining relative to the magnet and having alternately projected and recessed portions to change the magnetic field generated by the magnet, a magnetoresistive device comprising a plurality of magnetic field sensing elements and detecting changes in the magnetic field by movement of the rotary member of magnetic material, and a magnetic guide for adjusting changes in the magnetic field caused by the alternately projected and recessed portions of the rotary member of magnetic material.Type: GrantFiled: September 30, 1998Date of Patent: February 27, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiro Yokotani, Yasuyoshi Hatazawa, Izuru Shinjo, Takuji Nada
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Patent number: 6177793Abstract: A magnetic detector D is disclosed which can perform precise detection even when a moving member of magnetic material is rotating at a very low speed, and can output a signal corresponding to recessed and projected portions of the moving member of magnetic material when the power is turned on and when the rotary member of magnetic material is stopped. The magnetic detector includes a rotary member of magnetic material, a detecting unit for detecting a displacement of the rotary member of magnetic material, an AC coupling circuit for removing a DC component from an output signal of the detecting unit, a comparison circuit for converting an output signal of the AC coupling circuit into a binary signal, an output circuit for outputting an output signal of the comparison circuit, and a variable resistor for setting a comparison level for the comparison circuit to a level between two different signal levels.Type: GrantFiled: September 30, 1998Date of Patent: January 23, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Yasuyoshi Hatazawa, Takuji Nada, Masahiro Yokotani