Abstract: An optical waveguide structure containing a plurality of core portions for transmitting light (L), in which adjacent core portions are arranged with substantially parallel central axes, and the optical paths of the light (L) that is transmitted through the adjacent core portions are in opposite directions, wherein each core portion has a tapered section in which the area of the cross-section in a direction substantially perpendicular to the central axis decreases gradually in the direction of the optical path of the light (L). A highly reliable electronic device containing the optical waveguide structure is also provided.

Abstract: A system includes a managing terminal, a mobile device, and cameras. The mobile device sends, when it is near one of the cameras, positional information of the mobile device and a uniquely created identifier via a network to the managing terminal and displays information indicating the identifier in the form of a video image. The camera shoots the video image being displayed by the mobile device and including the information indicating the identifier to create a second video image including the information and sends the second video image via a network to the managing terminal. The managing terminal receives the second video image, extracts the identifier therefrom, and stores, if the identifier matches the identifier sent from the mobile device, the IP address assigned to the camera and the positional information with a correspondence established therebetween.

Abstract: An optical waveguide film includes at least one optical waveguide area having an X-direction and a Y-direction orthogonal to the X-direction. Such an optical waveguide film includes a plurality of core portions arranged side by side within the same layer so as to extend along the X-direction, each of the core portions having side surfaces, and the core portions adjoining to each other in the Y-direction being arranged through a gap therebetween; and a plurality of cladding portions provided so as to cover the side surfaces of each of the core portions, each of the cladding portions formed of a resin having an optical refractive index smaller than that of each of the core portions, and the cladding portion between the adjoining core portions providing each gap. In the optical waveguide film, a size of the gap between the adjoining core portions varies along the X-direction in at least a part of the optical waveguide area.

Abstract: A controller applies slight rotational torque to a drive gear of a reduction mechanism also in a predetermined range in which a motor does not produce any steering operation assist force. That is, the motor is caused to produce slight rotational torque not enough to drive a driven gear, and the rotational torque direction is reversed under a given condition. Accordingly, a backlash between the drive gear and the driven gear is eliminated.

Abstract: An optical waveguide structure containing a plurality of core portions for transmitting light (L), in which adjacent core portions are arranged with substantially parallel central axes, and the optical paths of the light (L) that is transmitted through the adjacent core portions are in opposite directions, wherein each core portion has a tapered section in which the area of the cross-section in a direction substantially perpendicular to the central axis decreases gradually in the direction of the optical path of the light (L). A highly reliable electronic device containing the optical waveguide structure is also provided.

Abstract: An object is to provide an optical waveguide that has low optical coupling loss when optically coupled with an optical element and that is capable of performing high-quality optical communication, a method for efficiently producing the optical waveguide, an optical waveguide module that is provided with the optical waveguide and is capable of performing high-quality optical communication, a method for efficiently producing the optical waveguide module, and an electronic apparatus.

Abstract: A controller applies slight rotational torque to a drive gear of a reduction mechanism also in a predetermined range in which a motor does not produce any steering operation assist force. That is, the motor is caused to produce slight rotational torque not enough to drive a driven gear, and the rotational torque direction is reversed under a given condition. Accordingly, a backlash between the drive gear and the driven gear is eliminated.

Abstract: An optical waveguide is provided. The optical waveguide includes a plurality of core portions and a plurality of clad portions in which each core portion being provided between a pair of clad portions. Each of the plurality of clad portions comprises: a low refractive-index area being in contact with the core portion, wherein a refractive index of the low refractive-index area is lower than that of the plurality of core portions; and a plurality of high refractive-index areas separated from the core portion through the low refractive-index area, wherein a refractive index of the plurality of high refractive-index areas is higher than the refractive index of the low refractive-index area. The plurality of high refractive-index areas are provided in the clad portion in an aligned manner or in a scattered manner. The plurality of high refractive-index areas are constituted of the same kind of material as a constituent material of the plurality of core portions.

Abstract: A system includes a managing terminal, a mobile device, and cameras. The mobile device sends, when it is near one of the cameras, positional information of the mobile device and a uniquely created identifier via a network to the managing terminal and displays information indicating the identifier in the form of a video image. The camera shoots the video image being displayed by the mobile device and including the information indicating the identifier to create a second video image including the information and sends the second video image via a network to the managing terminal. The managing terminal receives the second video image, extracts the identifier therefrom, and stores, if the identifier matches the identifier sent from the mobile device, the IP address assigned to the camera and the positional information with a correspondence established therebetween.

Abstract: An optical waveguide film includes at least one optical waveguide area having an X-direction and a Y-direction orthogonal to the X-direction. Such an optical waveguide film includes a plurality of core portions arranged side by side within the same layer so as to extend along the X-direction, each of the core portions having side surfaces, and the core portions adjoining to each other in the Y-direction being arranged through a gap therebetween; and a plurality of cladding portions provided so as to cover the side surfaces of each of the core portions, each of the cladding portions formed of a resin having an optical refractive index smaller than that of each of the core portions, and the cladding portion between the adjoining core portions providing each gap. In the optical waveguide film, a size of the gap between the adjoining core portions varies along the X-direction in at least a part of the optical waveguide area.

Abstract: It is an object of the present invention to provide an electric power steering apparatus to be small and compact. The control housing 30 is installed between the motor housing 25 of the electric motor 18 and the gear housing 22. The ECU controlling the electric motor 18 is accommodated in the accommodating room S formed within the control housing 30. The motor housing 25 accommodates the bus bar 45 connected to the coil 44 of the stator 36, and the resolver 40 detecting the rotational position of the rotor 35. The resolver 40 is installed within the bus bar mounting member 262 in inner side of radial direction. The partition 52 is mounted on the control housing 30 and the fixing screw 81 is engaged with the insulating member 84 by the way that the fixing screw 81 is inserted into insulating member 84 from its bottom surface side.

Abstract: A vehicle steering apparatus includes a steering member; a steering shaft connected to the steering member; a torque sensor for detecting a steering torque inputted into the steering member; and an electric motor for generating power that is transmitted to the steering shaft based on the steering torque detected by the torque sensor. The electric motor includes an annular rotor and an annular stator. The annular rotor includes an annular rotor core which coaxially surrounds the steering shaft and is rotatable together with a part of the steering shaft. An annular accommodation space is formed between an outer circumference of the steering shaft and an inner circumference of the annular rotor core, and at least a part of the torque sensor is disposed within the annular accommodation space.

Abstract: It is an object of the present invention to provide an electric power steering apparatus to be small and compact. The control housing 30 is installed between the motor housing 25 of the electric motor 18 and the gear housing 22. The ECU controlling the electric motor 18 is accommodated in the accommodating room S formed within the control housing 30. The motor housing 25 accommodates the bus bar 45 connected to the coil 44 of the stator 36, and the resolver 40 detecting the rotational position of the rotor 35. The rosolver 40 is installed within the bus bar mounting member 262 in inner side of radial direction. The partition 52 is mounted on the control housing 30 and the fixing screw 81 is engaged with the insulating member 84 by the way that the fixing screw 81 is inserted into insulating member 84 from its bottom surface side.

Abstract: A rotation sensor including a rotor mounted to a rotating shaft and having a conductive sensing unit which varies in width circumferentially thereof; and stationary cores each having an exciting coil being flown with an alternating exciting current for establishing a magnetic circuit with respect to the rotor and a core body formed of insulative magnetic material for retaining the exciting coil, and being mounted to the fixing member and disposed so as to oppose to the rotor at a distance in the axial direction of the shaft, wherein a core peripheral wall portion is formed in a corresponding area on the core body where the sensing unit project when viewed in the direction orthogonal to the sensing surface of the rotor, and the core peripheral wall portion is not formed in the area which is not corresponding thereto.

Abstract: A vehicle steering apparatus includes a steering shaft connected to a steering member and a cylindrical steering column rotatably supporting the steering shaft. An electric motor generates power on the basis of the steering torque detected by the torque sensor. The electric motor includes a pipe-shaped rotor core which coaxially surrounds the steering shaft and can rotate together with the steering shaft. At least a part of the torque sensor is disposed in the inward position of the rotor core in the radial direction.

Abstract: In a rotation sensor including a rotor 10 mounted to a rotating shaft S and having a conductive sensing unit 12 whereof the width varies in the circumferential direction; and stationary cores 31, 32, 41, 42 each including an exciting coil for forming a magnetic circuit with respect to the sensing unit of the rotor by allowing AC exciting current to flow therein, and a core body formed of magnetic material and retaining the exciting coil, and being mounted to the fixed member and disposed so as to oppose to the sensing unit of the rotor at a distance in the axial direction of the shaft, the stationary cores are disposed at two positions each having a central angle with respect to the axis of the shaft other than substantially 180°, so that the rotation sensor which is superior in mountability, is low in cost, and is superior in detection accuracy over a wider range is provided.

Abstract: In a rotation sensor including a rotor 10 mounted to a rotating shaft S and having a conductive sensing unit 12 whereof the width varies in the circumferential direction; and stationary cores 31, 32, 41, 42 each including an exciting coil for forming a magnetic circuit with respect to the sensing unit of the rotor by allowing AC exciting current to flow therein, and a core body formed of magnetic material and retaining the exciting coil, and being mounted to the fixed member and disposed so as to oppose to the sensing unit of the rotor at a distance in the axial direction of the shaft, the stationary cores are disposed at two positions each having a central angle with respect to the axis of the shaft other than substantially 180°, so that the rotation sensor which is superior in mountability, is low in cost, and is superior in detection accuracy over a wider range is provided.

Abstract: A rotation sensor including a rotor mounted to a rotating shaft and having a conductive sensing unit which varies in width circumferentially thereof; and stationary cores each having an exciting coil being flown with an alternating exciting current for establishing a magnetic circuit with respect to the rotor and a core body formed of insulative magnetic material for retaining the exciting coil, and being mounted to the fixing member and disposed so as to oppose to the rotor at a distance in the axial direction of the shaft, wherein a core peripheral wall portion is formed in a corresponding area on the core body where the sensing unit project when viewed in the direction orthogonal to the sensing surface of the rotor, and the core peripheral wall portion is not formed in the area which is not corresponding thereto.