Abstract: A current detector includes a magnetic core that is molded by sintering powder made from a magnetic material, and a current detection busbar. The current detection busbar is a conductor including a penetrating portion that penetrates a hole portion of the magnetic core in a first direction in which a current flows, and terminal portions that are in connection with the penetrating portion on both sides in the first direction. The width of the terminal portions is larger than the maximum width of the hole portion, and the minimum width of the cross-sectional contour of the penetrating portion is larger than the thickness of the terminal portions. An insulating casing holds the magnetic core, the current detection busbar, and the Hall element, while keeping them from coming into contact with each other.

Abstract: In a current detection device for detecting current in a busbar, a reduction in device size may be realized by employing a small magnetic core. The prevention or reduction of excessive heat generation by the busbar, the facilitation of the attachment task, and a reduction in the amount of space required for the attachment task may also be realized. The folded-back busbar is U-shaped with a bar-shaped penetration portion that passes through a hole portion of a magnetic core, two bar-shaped extension portions, and two flat plate-shaped penetration portions. The width of each terminal portion is larger than the widths of the penetration portion and the extension portions. An insulating casing supports the magnetic core, a Hall element, and the folded-back busbar in a fixed positional relationship, with the two terminal portions being exposed to the outside.

Abstract: A semiconductor laser device includes: a substrate having a principal plane; a photonic crystal layer having an epitaxial layer of gallium nitride formed on substrate in a direction in which principal plane extends and a low refractive index material having a refractive index lower than that of epitaxial layer; an n-type clad layer formed on substrate; a p-type clad layer formed on substrate; an active layer that is interposed between n-type clad layer and p-type clad layer and emits light when a carrier is injected thereinto; and a GaN layer that covers a region directly on photonic crystal layer. Thus, the semiconductor laser device can be manufactured without fusion.

Abstract: An electric junction box includes a current detection device. The current detection device has a magneto-electric conversion element and a magnetic core having a disposing space in which this magneto-electric conversion element is disposed, to detect magnetic flux occurring on the magnetic core as a current. The magnetic core has a bus bar insertion space through which a bus bar from which the current is to be detected is inserted, which bus bar has an insertion portion which is formed not to be larger than a width size of the disposing space in the magnetic core and to be inserted into the disposing space.

Abstract: There are provided a deformed bus bar for electrically connecting terminals of adjacent battery cells in an assembled battery, a core having both ends opposed to each other across a clearance and continuously formed around a hollow portion through which a part of the deformed bus bar penetrates, and a Hall IC disposed in the clearance for outputting an electric signal depending on a magnetic flux.

Abstract: An electric junction box includes a current detection device. The current detection device has a magneto-electric conversion element and a magnetic core having a disposing space in which this magneto-electric conversion element is disposed, to detect magnetic flux occurring on the magnetic core as a current. The magnetic core has a bus bar insertion space through which a bus bar from which the current is to be detected is inserted, which bus bar has an insertion portion which is formed not to be larger than a width size of the disposing space in the magnetic core and to be inserted into the disposing space.

Abstract: A semiconductor laser device (1) includes: a substrate (3) having a principal plane (3a); a photonic crystal layer (7) having an epitaxial layer (2a) of gallium nitride formed on substrate (3) in a direction in which principal plane (3a) extends and a low refractive index material (2b) having a refractive index lower than that of epitaxial layer (2a); an n-type clad layer (4) formed on substrate (3); a p-type clad layer (6) formed on substrate (3); an active layer (5) that is interposed between n-type clad layer (4) and p-type clad layer (6) and emits light when a carrier is injected thereinto; and a GaN layer (12) that covers a region directly on photonic crystal layer (7). Thus, the semiconductor laser device can be manufactured without fusion.

Abstract: Disclosed herein is a head-up display for a motor vehicle having a dashboard with a top surface, which comprises a projector enclosed in the dashboard, the projector including a light source, an object from which visual information is to be displayed and a lens, an aperture formed on the top surface of the dashboard which is covered by the lens or a transparent member for preventing dust or the like from entering thereinto, a reflecting member provided in front of a driving seat on which light projected from the projector through the aperture is reflected to produce the image of the visual information thereon, and a reflection preventing member for preventing the reflection of light entering from the outside of the vehicle on the lens of the projector or on the transparent member. An antireflection coating such as a black paint is applied on the upper surface of the reflection preventing member.

Abstract: A magnetic record/playback system of a rotating head type comprising switching device for switching the drive mode of a capstan motor to a low speed drive mode when the operation mode of the magnetic record/playback system is switched from a normal play mode to a still picture mode, level detecting device for producing a pulse in accordance with a period where a level of the envelope of a signal reproduced from the rotating head is below a predetermined level, signal supply for producing a logical product signal of the produced pulse and a head switching pulse of the rotating head, device for stopping the capstan being driven in the low speed drive mode in response to the logical product signal, and control device for controlling the detected level so that the width of the output pulse from the level detecting device is constant.

Abstract: A helical scanning rotary head type magnetic video recording and reproducing apparatus for recording and reproducing a video signal sequentially by a rotary head such that each field of the video signal follows a record locus which is oblique to the length of a magnetic tape is disclosed, in which when the apparatus is switched from a normal playback mode to a still image playback mode, a capstan is switched to a low speed drive mode and a lowest level point of an envelope of a reproduced output of the rotary head is detected and the capstan is stopped when the detected point lies at a rotary head switching point.