Patents by Inventor Shiro YOSHIDOMI
Shiro YOSHIDOMI 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: 11860007Abstract: An encoder includes a scale and a sensor. The scale has first and second absolute patterns. The sensor includes a light source, and first and second absolute light receivers. The first and second absolute light receivers receive light from the first and second absolute patterns, respectively. The first absolute light receiver receives light from the first pattern and includes first and second light receiving elements. Each first light receiving elements outputs a first signal with a first phase. Each second light receiving elements outputs a first signal with a second phase. The first and second light receiving elements are arranged alternately. The second absolute light receiver includes third and fourth light receiving elements. Each third light receiving element outputs a second signal with the first phase. The third and fourth light receiving elements are arranged alternately. Each fourth light receiving element outputs a second signal with the second phase.Type: GrantFiled: December 22, 2022Date of Patent: January 2, 2024Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Hiroshi Takada, Yasushi Yoshida, Shiro Yoshidomi, Masanobu Harada, Yasuhiro Matsutani, Daisuke Furukawa
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Publication number: 20230129497Abstract: An encoder includes a scale and a sensor. The scale has first and second absolute patterns. The sensor includes a light source, and first and second absolute light receivers. The first and second absolute light receivers receive light from the first and second absolute patterns, respectively. The first absolute light receiver receives light from the first pattern and includes first and second light receiving elements. Each first light receiving elements outputs a first signal with a first phase. Each second light receiving elements outputs a first signal with a second phase. The first and second light receiving elements are arranged alternately. The second absolute light receiver includes third and fourth light receiving elements. Each third light receiving element outputs a second signal with the first phase. The third and fourth light receiving elements are arranged alternately. Each fourth light receiving element outputs a second signal with the second phase.Type: ApplicationFiled: December 22, 2022Publication date: April 27, 2023Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Hiroshi TAKADA, Yasushi YOSHIDA, Shiro YOSHIDOMI, Masanobu HARADA, Yasuhiro MATSUTANI, Daisuke FURUKAWA
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Patent number: 11566920Abstract: An encoder includes a scale and a sensor. The scale has first and second absolute patterns. The sensor includes a light source, and first and second absolute light receivers. The first and second absolute light receivers receive light from the first and second absolute patterns, respectively. The first absolute light receiver receives light from the first pattern and includes first and second light receiving elements. Each first light receiving elements outputs a first signal with a first phase. Each second light receiving elements outputs a first signal with a second phase. The first and second light receiving elements are arranged alternately. The second absolute light receiver includes third and fourth light receiving elements. Each third light receiving element outputs a second signal with the first phase. The third and fourth light receiving elements are arranged alternately. Each fourth light receiving element outputs a second signal with the second phase.Type: GrantFiled: July 17, 2020Date of Patent: January 31, 2023Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Hiroshi Takada, Yasushi Yoshida, Shiro Yoshidomi, Masanobu Harada, Yasuhiro Matsutani, Daisuke Furukawa
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Publication number: 20210018890Abstract: An encoder includes a scale and a sensor. The scale has first and second absolute patterns. The sensor includes a light source, and first and second absolute light receivers. The first and second absolute light receivers receive light from the first and second absolute patterns, respectively. The first absolute light receiver receives light from the first pattern and includes first and second light receiving elements. Each first light receiving elements outputs a first signal with a first phase. Each second light receiving elements outputs a first signal with a second phase. The first and second light receiving elements are arranged alternately. The second absolute light receiver includes third and fourth light receiving elements. Each third light receiving element outputs a second signal with the first phase. The third and fourth light receiving elements are arranged alternately. Each fourth light receiving element outputs a second signal with the second phase.Type: ApplicationFiled: July 17, 2020Publication date: January 21, 2021Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Hiroshi TAKADA, Yasushi YOSHIDA, Shiro YOSHIDOMI, Masanobu HARADA, Yasuhiro MATSUTANI, Daisuke FURUKAWA
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Patent number: 9625283Abstract: An encoder includes a track having optical effecters arranged to have an absolute pattern in a measurement direction, a light source configured to emit diffusion light to the track, and a light receiving array configured to have light receiving elements arranged in the measurement direction and to receive light reflected or transmitted by the track. The light receiving elements fall within an area which is positioned corresponding to an area between the optical effecters and to which the light reflected by the track dose not reach.Type: GrantFiled: October 29, 2014Date of Patent: April 18, 2017Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi Yoshida, Yasuhiro Matsutani, Shiro Yoshidomi, Hiroshi Takada, Yuji Arinaga, Ikuma Murokita, Masanobu Harada, Hiroki Kondo
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Patent number: 9562794Abstract: An encoder includes a plurality of slit tracks, a point light source, a first light-receiving array, a second light-receiving array, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The first light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern. The second light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns. The third light-receiving array is configured to receive light reflected by the slit track comprising an absolute pattern.Type: GrantFiled: November 4, 2014Date of Patent: February 7, 2017Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi Yoshida, Yasuhiro Matsutani, Shiro Yoshidomi, Hiroshi Takada, Yuji Arinaga, Ikuma Murokita, Masanobu Harada, Hiroki Kondo
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Patent number: 9436166Abstract: An encoder includes a plurality of slit tracks, a point light source, a first to third light-receiving arrays. The plurality of slit tracks respectively comprises a plurality of reflection slits. The point light source emits diffusion light to the plurality of slit tracks. The first light-receiving array receives light reflected by the slit track comprising an incremental pattern. The second light-receiving array receives light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns, and is disposed at a position on a side of a direction where the point light source is disposed, than the first light-receiving array, The third light-receiving array receives light reflected by the slit track comprising an absolute pattern, and is disposed at a position on a side of a direction where the point light source is disposed, than the first light-receiving array.Type: GrantFiled: November 4, 2014Date of Patent: September 6, 2016Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi Yoshida, Yasuhiro Matsutani, Shiro Yoshidomi, Hiroshi Takada, Yuji Arinaga, Ikuma Murokita, Masanobu Harada, Hiroki Kondo
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Patent number: 9423279Abstract: An optical module includes: a light source configured to emit diffusion light to tracks; one light receiving array and another light receiving array which are arranged across the light source in a width direction substantially vertical to the measurement direction; a light receiving array arranged between the one light receiving array and the light source, and configured to receive light which is reflected at the tracks having a first incremental pattern; and a light receiving array arranged between the another first light receiving array and the light source, and configured to receive light which is reflected at the tracks having a second incremental pattern which pitch is longer than a pitch of the first incremental pattern.Type: GrantFiled: October 29, 2014Date of Patent: August 23, 2016Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi Yoshida, Yasuhiro Matsutani, Shiro Yoshidomi, Hiroshi Takada, Yuji Arinaga, Ikuma Murokita, Masanobu Harada, Hiroki Kondo
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Publication number: 20160161295Abstract: An encoder includes an object body having an absolute pattern formed along a measurement direction, a light source positioned such that the light source emits light to the absolute pattern of the object body, and light receiving elements aligned along the measurement direction such that the light receiving elements receive the light transmitted through or reflected by the absolute pattern of the object body. The light receiving elements include a first light receiving element having a polygonal shape and having a first region in the polygonal shape and a second region formed on an inner side of the first region such that the second region has an optical sensitivity lower than an optical sensitivity of the first region and that the first region includes corner portions of the polygonal shape.Type: ApplicationFiled: December 7, 2015Publication date: June 9, 2016Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Koji UEMURA, Yuji ARINAGA, Shiro YOSHIDOMI, lkuma MUROKITA, Hiroshi TAKADA, Jiro MURAOKA
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Publication number: 20160164383Abstract: An encoder includes an absolute pattern, a light source, and a plurality of light reception elements. The absolute pattern is disposed in a measurement direction. The light source is configured to emit light to the absolute pattern. The plurality of light reception elements are arranged in the measurement direction and configured to receive the light emitted from the light source and transmitted through or reflected by the absolute pattern. The plurality of light reception elements include at least one first light reception element having an edge in the measurement direction. The edge is inclined relative to a width direction perpendicular to the measurement direction.Type: ApplicationFiled: November 24, 2015Publication date: June 9, 2016Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Hiroshi TAKADA, Yuji ARINAGA, Shiro YOSHIDOMI, Ikuma MUROKITA, Koji UEMURA, Jiro MURAOKA
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Patent number: 9335185Abstract: The encoder includes a plurality of slit tracks, a point light source, two first light-receiving arrays, two second light-receiving arrays, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The two first light-receiving arrays are disposed sandwiching the point light source in a width direction substantially orthogonal to the measurement direction. The two second light-receiving arrays are disposed sandwiching the point light source in the measurement direction. The third light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern that differs in pitch from other incremental patterns, and is disposed at a position in a direction where the first light-receiving array is disposed than the point light source.Type: GrantFiled: November 4, 2014Date of Patent: May 10, 2016Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi Yoshida, Yasuhiro Matsutani, Shiro Yoshidomi, Hiroshi Takada, Yuji Arinaga, Ikuma Murokita, Masanobu Harada, Hiroki Kondo
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Patent number: 9281729Abstract: A rotation detector provided in a motor unit according to an embodiment includes a first support and a second support, a pair of magnetic field generator, at least one magnetic field detector, and a first magnetic member and a second magnetic member. The pair of magnetic field generator is provided on the first support in a manner facing the second support, and has opposite polarities. The magnetic field detector is formed by winding a coil around a magnetic element whose magnetized direction changes in the longitudinal direction, and is provided on the second support in such a manner that a longitudinal-direction side of the magnetic element faces the first support. Each of the first magnetic member and the second magnetic member is made of a magnetic material, and covers a longitudinal-direction end of the magnetic field detector facing the first support.Type: GrantFiled: September 3, 2013Date of Patent: March 8, 2016Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Shiro Yoshidomi, Ikuma Murokita, Yuji Arinaga, Yasushi Yoshida, Jiro Muraoka, Shoji Oyama
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Publication number: 20150123585Abstract: An optical module includes: a light source configured to emit diffusion light to tracks; one light receiving array and another light receiving array which are arranged across the light source in a width direction substantially vertical to the measurement direction; a light receiving array arranged between the one light receiving array and the light source, and configured to receive light which is reflected at the tracks having a first incremental pattern; and a light receiving array arranged between the another first light receiving array and the light source, and configured to receive light which is reflected at the tracks having a second incremental pattern which pitch is longer than a pitch of the first incremental pattern.Type: ApplicationFiled: October 29, 2014Publication date: May 7, 2015Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi YOSHIDA, Yasuhiro MATSUTANI, Shiro YOSHIDOMI, Hiroshi TAKADA, Yuji ARINAGA, Ikuma MUROKITA, Masanobu HARADA, Hiroki KONDO
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Publication number: 20150122982Abstract: An encoder includes a track having optical effecters arranged to have an absolute pattern in a measurement direction, a light source configured to emit diffusion light to the track, and a light receiving array configured to have light receiving elements arranged in the measurement direction and to receive light reflected or transmitted by the track. The light receiving elements fall within an area which is positioned corresponding to an area between the optical effecters and to which the light reflected by the track dose not reach.Type: ApplicationFiled: October 29, 2014Publication date: May 7, 2015Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi YOSHIDA, Yasuhiro MATSUTANI, Shiro YOSHIDOMI, Hiroshi TAKADA, Yuji ARINAGA, Ikuma MUROKITA, Masanobu HARADA, Hiroki KONDO
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Publication number: 20150123586Abstract: The encoder includes a plurality of slit tracks, a point light source, two first light-receiving arrays, two second light-receiving arrays, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The two first light-receiving arrays are disposed sandwiching the point light source in a width direction substantially orthogonal to the measurement direction. The two second light-receiving arrays are disposed sandwiching the point light source in the measurement direction. The third light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern that differs in pitch from other incremental patterns, and is disposed at a position in a direction where the first light-receiving array is disposed than the point light source.Type: ApplicationFiled: November 4, 2014Publication date: May 7, 2015Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi YOSHIDA, Yasuhiro MATSUTANI, Shiro YOSHIDOMI, Hiroshi TAKADA, Yuji ARINAGA, Ikuma MUROKITA, Masanobu HARADA, Hiroki KONDO
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Publication number: 20150122980Abstract: An encoder includes a plurality of slit tracks, a point light source, a first light-receiving array, a second light-receiving array, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The first light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern. The second light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns. The third light-receiving array is configured to receive light reflected by the slit track comprising an absolute pattern.Type: ApplicationFiled: November 4, 2014Publication date: May 7, 2015Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi YOSHIDA, Yasuhiro MATSUTANI, Shiro YOSHIDOMI, Hiroshi TAKADA, Yuji ARINAGA, Ikuma MUROKITA, Masanobu HARADA, Hiroki KONDO
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Publication number: 20150123587Abstract: An encoder includes a plurality of slit tracks, a point light source, a first light-receiving array, and a second light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The first light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern, and is disposed at a position in a first direction than the point light source. The second light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern that differs in pitch from the slit track corresponding to the first light-receiving array, and is disposed at a position in a second direction than the point light source. The second direction forms an angle ? with respect to the first direction.Type: ApplicationFiled: November 4, 2014Publication date: May 7, 2015Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi YOSHIDA, Yasuhiro MATSUTANI, Shiro YOSHIDOMI, Hiroshi TAKADA, Yuji ARINAGA, Ikuma MUROKITA, Masanobu HARADA, Hiroki KONDO
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Publication number: 20150123588Abstract: An encoder includes a plurality of slit tracks, a point light source, a first to third light-receiving arrays. The plurality of slit tracks respectively comprises a plurality of reflection slits. The point light source emits diffusion light to the plurality of slit tracks. The first light-receiving array receives light reflected by the slit track comprising an incremental pattern. The second light-receiving array receives light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns, and is disposed at a position on a side of a direction where the point light source is disposed, than the first light-receiving array, The third light-receiving array receives light reflected by the slit track comprising an absolute pattern, and is disposed at a position on a side of a direction where the point light source is disposed, than the first light-receiving array.Type: ApplicationFiled: November 4, 2014Publication date: May 7, 2015Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Yasushi YOSHIDA, Yasuhiro MATSUTANI, Shiro YOSHIDOMI, Hiroshi TAKADA, Yuji ARINAGA, Ikuma MUROKITA, Masanobu HARADA, Hiroki KONDO
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Publication number: 20140197823Abstract: A rotation detector of a motor according to an embodiment includes a first support and a second support, a pair of magnetic field forming units, at least one magnetic field detector, and a first magnetic member and a second magnetic member. The first magnetic member and the second magnetic member are each made of a magnetic material, cover longitudinal-direction both ends of the magnetic field detector facing the first support, respectively, and face each other with a gap interposed therebetween at a longitudinal-direction mid-portion of the magnetic field detector in the longitudinal direction. A dimension of each of the magnetic field forming units in a tangential direction of a circumference is larger than a dimension of the corresponding magnetic field forming unit in a radial direction and is larger than the distance of the gap.Type: ApplicationFiled: January 14, 2014Publication date: July 17, 2014Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Shiro YOSHIDOMI, Ikuma MUROKITA, Yasushi YOSHIDA, Jiro MURAOKA, Shoji OYAMA
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Publication number: 20140062366Abstract: A rotation detector provided in a motor unit according to an embodiment includes a first support and a second support, a pair of magnetic field generator, at least one magnetic field detector, and a first magnetic member and a second magnetic member. The pair of magnetic field generator is provided on the first support in a manner facing the second support, and has opposite polarities. The magnetic field detector is formed by winding a coil around a magnetic element whose magnetized direction changes in the longitudinal direction, and is provided on the second support in such a manner that a longitudinal-direction side of the magnetic element faces the first support. Each of the first magnetic member and the second magnetic member is made of a magnetic material, and covers a longitudinal-direction end of the magnetic field detector facing the first support.Type: ApplicationFiled: September 3, 2013Publication date: March 6, 2014Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Shiro YOSHIDOMI, Ikuma MUROKITA, Yuji ARINAGA, Yasushi YOSHIDA, Jiro MURAOKA, Shoji OYAMA