Patents by Inventor Naoki Kojima
Naoki Kojima 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: 20180323733Abstract: A brushless motor (18) which supplies currents to coils (U1, U2, V1, V2, W1, and W2) and rotates a rotor (27), the brushless motor comprising a control apparatus (37) which switches and selectively executes: first energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at first timing, and to continue the energization for a first period to control the rotation number of the rotor (27); and second energization control to start energization to the coils (U1, U2, V1, V2, W1, and W2) at second timing advanced by an electric angle with respect to the first timing, and to continue the energization for a second period longer than the first period to control the rotation number of the rotor (27).Type: ApplicationFiled: April 20, 2018Publication date: November 8, 2018Inventors: Tomohiko Annaka, Hiroto Tanaka, Naoki Kojima, Toru Furusawa, Tomofumi Kobayashi
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Patent number: 10116186Abstract: A motor case (31) in which a stationary portion (35) is fixed, and a gear case (41) in which a gear mechanism (SD) is accommodated are made of aluminium, most heat generated from the stationary portion (35) at the time of actuation of a brushless wiper motor (20) can be directly dissipated outside from the motor case (31). That is, compared with conventional technique, heat transmitted to the motor case (31) can be efficiently dissipated outside, and the motor case (31) does not reach high temperature. Therefore, as a matter of course, reduction in size and weight can be achieved, suppression of electromagnetic noise can be achieved, and heat-resistance strength can be enhanced. Expensive components capable of resisting high temperatures are not required, and reduction in manufacturing cost can be achieved.Type: GrantFiled: March 26, 2014Date of Patent: October 30, 2018Assignee: Mitsuba CorporationInventors: Takeshi Kanai, Hiroto Tanaka, Tomohiko Annaka, Naoki Kojima, Hirokazu Shoda
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Patent number: 10020474Abstract: A cell block includes holding sections that hold a battery cell arrayed body of a lower layer between a lower holding frame member and a middle holding frame member, hold a battery cell arrayed body of an upper layer between the middle holding frame member and an upper holding frame member, and hold the battery cell arrayed body of the upper layer and the battery cell arrayed body of the lower layer in a state displaced from each other in the row direction. Lower fastening sections are disposed at positions below a battery cell and projects in the row direction beyond the battery cell arrayed body of the lower layer, and join the lower holding frame member and the middle holding frame member with each other by fastening.Type: GrantFiled: April 12, 2011Date of Patent: July 10, 2018Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida
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Patent number: 9967528Abstract: With respect to an image of at least one color component included among a plurality of color components, an image processing apparatus decides a position shift correction amount for reducing a shift between a position indicated by data and a position in the image in a projected state, and applies position shift correction to the image based on the position shift correction amount that has been decided. The image processing apparatus calculates an edge intensity to be used in edge emphasis processing for the image based on the position shift correction amount, and executes the edge emphasis processing with respect to the image after the position shift correction based on the calculated edge intensity.Type: GrantFiled: May 17, 2017Date of Patent: May 8, 2018Assignee: CANON KABUSHIKI KAISHAInventor: Naoki Kojima
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Publication number: 20180123105Abstract: The present invention proposes a structure of a battery module in which a spacer can slide by means of a guide member constituting the battery module and can be positioned. A battery module according to the present invention is a battery module 9 provided with a battery block 8 in which a plurality of rectangular battery cells 1 are arranged and laminated, and includes a spacer 2 which intervenes between the plurality of battery cells 1, guide members 4 and 5 which slidably support the spacer 2 along a laminating direction of the battery cells 1, and end plates 3 as a pair which are respectively arranged on one side and the other side of the guide members 4 and 5 in a sliding direction and which sandwich the battery block 8 from both sides in the sliding direction.Type: ApplicationFiled: December 26, 2017Publication date: May 3, 2018Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Naoya TOKOO, Osamu KUBOTA, Hidekazu FUJIMURA, Michihiro KIMURA, Naoki KOJIMA, Takashi SUZUKI
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Patent number: 9923494Abstract: A brushless motor comprises: a stator 21 having armature coils 21a, 21b, and 21c; a rotor 22 which is rotated by a revolving magnetic field; and a switching element 30a, wherein the brushless motor has a rotation number control unit 33 which switches between low-speed and high-speed mode, wherein in the low-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at predetermined energization timing and controls a duty ratio to control the rotation number of the rotor 22, and in the high-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at energization timing advanced from the energization timing for the low-speed mode, thereby performing field weakening control of weakening the revolving magnetic field from that of the low-speed mode to control the rotation number of the rotor 22.Type: GrantFiled: July 24, 2017Date of Patent: March 20, 2018Assignee: Mitsuba CorporationInventors: Masaaki Kimura, Hiroto Tanaka, Tamotsu Iwazaki, Tomohiko Annaka, Naoki Kojima, Junya Kitazawa
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Patent number: 9912024Abstract: The present invention addresses the problem of obtaining a battery capable of achieving a uniform temperature among a plurality of battery cells in a simple configuration while achieving size and weight reductions, and a battery module using the battery block. The battery block of the present invention has a structure such that a pair of end plates is disposed at both ends of a plurality of battery cells in an arranged direction; first spacers are disposed between the plurality of battery cells; and second spacers are disposed between the battery cells and the end plates. The first spacers have a space for allowing a flow of cooling gas. The second spacers block the flow of the cooling gas between the battery cells and the end plates and have a thermal insulating property for suppressing heat transmission between the battery cells and the end plates.Type: GrantFiled: October 11, 2013Date of Patent: March 6, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Yuki Ejiri, Naoki Kojima, Michihiro Kimura
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Patent number: 9893333Abstract: Provided are a battery block and a secondary battery module capable of holding a plurality of battery cells stably and so reducing a load applied to a welding part of a conductive member that is connected to an electrode by welding or the like. The battery block includes a lower holding frame and a middle holding frame, one of which includes two protrusions that are in contact with an outer peripheral face of each battery cell and the other includes a pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction. Then, one of an upper holding frame and the middle holding frame includes two protrusions that are in contact with an outer peripheral face of each battery cell and the other includes a pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction.Type: GrantFiled: April 10, 2013Date of Patent: February 13, 2018Assignees: HITACHI AUTOMOTIVE SYSTEMS, LTD., NISSAN MOTOR CO., LTD.Inventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida, Shigeyuki Kiyota, Yoshiyuki Tanaka, Toyoki Iguchi, Hiroaki Saitou
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Publication number: 20180041078Abstract: An electric motor includes a yoke having a cylindrical section, two pairs of permanent magnets disposed at an inner circumferential surface of the cylindrical section to oppose each other, and an armature rotatably supported further inside in a radial direction than the permanent magnets, wherein at least a pair of first flat sections opposing each other in the radial direction are formed at the cylindrical section, and the permanent magnets are disposed at positions distant from the first flat sections.Type: ApplicationFiled: October 16, 2017Publication date: February 8, 2018Inventors: Yoshichika Kawashima, Teppei Tokizaki, Naoki Kojima
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Patent number: 9876207Abstract: The present invention proposes a structure of a battery module in which a spacer can slide by means of a guide member constituting the battery module and can be positioned. A battery module according to the present invention is a battery module 9 provided with a battery block 8 in which a plurality of rectangular battery cells 1 are arranged and laminated, and includes a spacer 2 which intervenes between the plurality of battery cells 1, guide members 4 and 5 which slidably support the spacer 2 along a laminating direction of the battery cells 1, and end plates 3 as a pair which are respectively arranged on one side and the other side of the guide members 4 and 5 in a sliding direction and which sandwich the battery block 8 from both sides in the sliding direction.Type: GrantFiled: May 28, 2014Date of Patent: January 23, 2018Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Naoya Tokoo, Osamu Kubota, Hidekazu Fujimura, Michihiro Kimura, Naoki Kojima, Takashi Suzuki
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Patent number: 9831728Abstract: An electric motor includes a yoke having a cylindrical section, two pairs of permanent magnets disposed at an inner circumferential surface of the cylindrical section to oppose each other, and an armature rotatably supported further inside in a radial direction than the permanent magnets, wherein at least a pair of first flat sections opposing each other in the radial direction are formed at the cylindrical section, and the permanent magnets are disposed at positions distant from the first flat sections.Type: GrantFiled: May 25, 2012Date of Patent: November 28, 2017Assignee: Mitsuba CorporationInventors: Yoshichika Kawashima, Teppei Tokizaki, Naoki Kojima
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Publication number: 20170339381Abstract: With respect to an image of at least one color component included among a plurality of color components, an image processing apparatus decides a position shift correction amount for reducing a shift between a position indicated by data and a position in the image in a projected state, and applies position shift correction to the image based on the position shift correction amount that has been decided. The image processing apparatus calculates an edge intensity to be used in edge emphasis processing for the image based on the position shift correction amount, and executes the edge emphasis processing with respect to the image after the position shift correction based on the calculated edge intensity.Type: ApplicationFiled: May 17, 2017Publication date: November 23, 2017Inventor: Naoki Kojima
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Publication number: 20170324357Abstract: A brushless motor comprises: a stator 21 having armature coils 21a, 21b, and 21c; a rotor 22 which is rotated by a revolving magnetic field; and a switching element 30a, wherein the brushless motor has a rotation number control unit 33 which switches between low-speed and high-speed mode, wherein in the low-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at predetermined energization timing and controls a duty ratio to control the rotation number of the rotor 22, and in the high-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at energization timing advanced from the energization timing for the low-speed mode, thereby performing field weakening control of weakening the revolving magnetic field from that of the low-speed mode to control the rotation number of the rotor 22.Type: ApplicationFiled: July 24, 2017Publication date: November 9, 2017Inventors: Masaaki Kimura, Hiroto Tanaka, Tamotsu Iwazaki, Tomohiko Annaka, Naoki Kojima, Junya Kitazawa
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Publication number: 20170317564Abstract: A driving apparatus having an electric motor configured to rotate a rotating shaft (27) by a supplied current, the driving apparatus comprising: a control board (49) which is positioned relative to the electric motor, and on which electronic components for controlling the electric motor is mounted; a plurality of first terminals (58, 59, 60) which are mounted on the control board (49), the first terminals (58, 59, 60) carrying a current; a plurality of second terminals (44, 45, 46) connected to the respective first terminals (58, 59, 60), the second terminals (44, 45, 46) carrying a current, the second terminals (44, 45, 46) being disposed outside the rotating shaft (27) in a radial direction of the rotating shaft (27) and arranged along a circumferential direction of the rotating shaft (27).Type: ApplicationFiled: October 26, 2015Publication date: November 2, 2017Inventors: Yukiyoshi Iso, Naoki Kojima
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Publication number: 20170313283Abstract: In a brushless wiper motor, first and second pressing claws (43a and 43b) are formed on an outer periphery (OP) of steel sheets (34a) forming a stator core (34), and press-fitted to an inner periphery (IP) of the motor housing unit (31) so that the stator core (34) is fixed to the motor housing unit (31), base end portions of the first and second pressing claws (43a and 43b) are respectively connected to first and second walls formed on the outer periphery (OP) of the steel sheets (34a), and tip end portions of the first and second pressing claws (43a and 43b) each serves as a free end, and are directed in a circumferential direction of the stator core (34).Type: ApplicationFiled: November 4, 2015Publication date: November 2, 2017Inventors: Naoki Kojima, Masaaki Kimura, Yukiyoshi Iso
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Publication number: 20170289493Abstract: When deforming a first image into a second image and generating a third image which contains the second image, coordinate values indicating a position of each of a plurality of grid points after deformation disposed in the second image are stored, and it is determined whether or not a pixel of interest in the third image locates in the second image, based on the stored coordinate values.Type: ApplicationFiled: October 1, 2015Publication date: October 5, 2017Inventor: Naoki Kojima
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Publication number: 20170237870Abstract: A device control apparatus (mobile equipment) wirelessly receives specification information related to a specifications of a device from the device when a first connection with the device is established using the short distance wireless communication, performs settings related to a process to be executed in the device depending on the specifications of the device on the basis of the specification information, and executes a process of the settings, which depend on the specifications of the device, in the device when a second connection with the device is established using the short distance wireless communication.Type: ApplicationFiled: May 3, 2017Publication date: August 17, 2017Inventors: Naoki KOJIMA, Taisuke KANEKO
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Patent number: 9735717Abstract: A brushless motor comprises: a stator 21 having armature coils 21a, 21b, and 21c; a rotor 22 which is rotated by a revolving magnetic field; and a switching element 30a, wherein the brushless motor has a rotation number control unit 33 which switches between low-speed and high-speed mode, wherein in the low-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at predetermined energization timing and controls a duty ratio to control the rotation number of the rotor 22, and in the high-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at energization timing advanced from the energization timing for the low-speed mode, thereby performing field weakening control of weakening the revolving magnetic field from that of the low-speed mode to control the rotation number of the rotor 22.Type: GrantFiled: April 19, 2017Date of Patent: August 15, 2017Assignee: Mitsuba CorporationInventors: Masaaki Kimura, Hiroto Tanaka, Tamotsu Iwazaki, Tomohiko Annaka, Naoki Kojima, Junya Kitazawa
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Publication number: 20170222581Abstract: A brushless motor comprises: a stator 21 having armature coils 21a, 21b, and 21c; a rotor 22 which is rotated by a revolving magnetic field; and a switching element 30a, wherein the brushless motor has a rotation number control unit 33 which switches between low-speed and high-speed mode, wherein in the low-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at predetermined energization timing and controls a duty ratio to control the rotation number of the rotor 22, and in the high-speed mode, the rotation number control unit 33 supplies current to the armature coils 21a, 21b, and 21c at energization timing advanced from the energization timing for the low-speed mode, thereby performing field weakening control of weakening the revolving magnetic field from that of the low-speed mode to control the rotation number of the rotor 22.Type: ApplicationFiled: April 19, 2017Publication date: August 3, 2017Inventors: Masaaki Kimura, Hiroto Tanaka, Tamotsu Iwazaki, Tomohiko Annaka, Naoki Kojima, Junya Kitazawa
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Patent number: 9685682Abstract: A secondary battery module 1 of the present invention stores cell blocks 40 in a module case 2, and cools battery cells 101 in the cell blocks 40 by circulating coolant to the inside of the cell blocks by introduction of the coolant into the module case 2. The secondary battery module has a structure of communicating coolant circulation ports 22 that open to a case wall section 21 of the module case 2 and coolant circulation ports 62a that open to the cell blocks 40 with each other by a communication member 71, and passing wiring through a space region 80 formed outside the communication member 71 and between the case wall section 21 and the cell blocks 40. Thus, wiring can be executed without interfering flow of the coolant, and the total secondary battery module 1 can be miniaturized.Type: GrantFiled: August 31, 2011Date of Patent: June 20, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida