Abstract: In a biaxial optical deflector, multiple mirror units are arranged in an array. Each of the mirror units includes one mirror and one mirror driver coupled to said mirror for rocking the mirror.
Abstract: A piezoelectric actuator is formed like a rectangular flat plate, and includes a substrate layer, a lower electrode layer, a piezoelectric layer, and an upper electrode layer formed in this order from bottom to top in a thickness direction. The upper electrode layer is constituted of a plurality of electrode segments separated in a surface direction, and connection wires connecting the electrode segments which are adjoining in the surface direction.
Abstract: An optical semiconductor element comprises: an AlN substrate; an n-type semiconductor layer composed of an AlGaN layer, the AlGaN layer being grown on the AlN substrate and being pseudomorphic with the AlN substrate, an Al composition or the AlGaN layer being reduced with an increase in distance from the AlN substrate; an active layer which is grown on the n-type semiconductor layer; and a p-type semiconductor layer which is grown on the active layer.
Abstract: Provided is an optical scanner including: a mirror driving unit which drives a scanning mirror which reflects light from a light source based on a drive signal; an optical sensor which detects scanning light entering first and second detection positions set on both sides of a range of the maximum scan angle within the range; and a calibrating unit which calibrates the intensity of the drive signal based on the time point at which the detection is performed and the frequency and intensity of the drive signal.
Abstract: A group III nitride semiconductor element includes an active layer between an n-type layer and a p-type layer and has a mesa structure containing the p-type layer, and includes an n electrode on the n-type layer and a p electrode on the p-type layer. The p electrode is obtained by sequentially laminating a first metal layer, a conductive layer and a second metal layer in this order. The resistivity of the conductive layer is higher than the resistivity of the first metal layer.
Abstract: An ultraviolet light-emitting element includes a support substrate, a group III-V nitride semiconductor layer structure mounted on a mounting surface of the support substrate and including an n-type semiconductor layer, a light-emitting layer, a p-type cladding layer and a p-type contact layer stacked in this order on the support substrate, and an n-type electrode and a p-type electrode mounted on the n-type semiconductor and p-type contact layer, respectively. The support substrate has an indented portion formed on at least a part of a light emitting surface of the support substrate opposite to a mounting surface of the n-type semiconductor layer. An area of the n-type semiconductor layer surface exposed to the outside is at least 20% and at most 90% in largeness. Areas of the p-type contact layer surface and p-type electrode surface exposed to the outside are at least 5% and at most 50% in largeness.
Abstract: A semiconductor light-emitting apparatus includes: a wiring substrate; multiple semiconductor light-emitting elements mounted via multiple eutectic layers, respectively, on the wiring substrate; and a wavelength-converting plate via multiple transparent adhesive layers on upper surfaces of the semiconductor light-emitting elements, respectively. A standard deviation of thicknesses of the transparent adhesive layers is smaller than a standard deviation of thicknesses of the eutectic layers.
Abstract: A group III nitride semiconductor light emitting element includes an active layer between an n-type layer and a p-type layer, having an n-electrode on the n-type layer and a p-electrode on the p-type layer, and having a mesa structure containing the p-type layer. In a top view of the group III nitride semiconductor light emitting element, the distance between a portion of an end part of the mesa structure and the periphery of the p-electrode is ? or more of a diffusion length Ls.
Abstract: A light-emitting device having a plurality of light-emitting elements closely adjacently disposed in spite of using only one substrate is provided. One or more light-emitting elements are flip-chip mounted on each of upper surface and lower surface of a substrate. The light-emitting elements are disposed so that the light-emitting elements on the upper surface of the substrate and the light-emitting elements on the lower surface of the substrate are closely adjacent to each other when they are seen from above the substrate. The light-emitting elements mounted on the upper surface of the substrate have light-emitting surfaces as the upper surfaces, and the light-emitting elements mounted on the lower surfaces of the substrate have light-emitting surfaces on the substrate side. The substrate transmits at least lights emitted by the light-emitting elements mounted on the lower surface of the substrate.
Abstract: To provide a technique capable of accurately obtaining the attitude of a vehicle in the pitch direction. A device controls the optical axis of a vehicular lamp in accordance with an attitude change in pitch direction of the vehicle having (a) an angle calculation part which obtains acceleration associated with the vertical and the horizontal direction at a predetermined time interval, obtains a first and a second acceleration related to the vertical and the horizontal direction by eliminating the gravitational acceleration component from each acceleration, calculates a vehicle traveling direction acceleration based on the two accelerations, and obtains a vehicle attitude angle based on a correlation between the acceleration and the vehicle traveling direction acceleration, and (b) an optical axis setting part which generates a control signal for controlling the optical axis of the lamp based on the vehicle attitude angle, and provides the control signal to the lamp.
Abstract: A semiconductor light-emitting apparatus is constructed by a substrate; a semiconductor light-emitting element mounted on the substrate; a wavelength-converting structure, provided on the semiconductor light-emitting element, at least an outer edge portion of the wavelength-converting structure having an uneven top surface; and a white-light reflective layer provided on the substrate to surround sidewalls of the semiconductor light-emitting element and the wavelength-converting structure. The white-light reflective layer further includes an additional transparent resin layer excluding the reflective fillers on at least the outer edge portion of the wavelength-converting structure. The additional transparent resin layer is coupled to the transparent resin layer.
Abstract: A vehicle lighting apparatus includes: a light source; a reflector that reflects light emitted from the light source toward a vehicle travel direction; a light distribution control unit that controls light distribution of light reflected by the reflector; and a projection lens that projects the light of which the light distribution is controlled by the light distribution control unit toward the vehicle travel direction, wherein the light distribution control unit has a structure in which a plurality of reflection elements are provided to be aligned in a vehicle width direction, and wherein light that is incident on the projection lens from an upper direction of the plurality of reflection elements of the light reflected by the reflector forms a light distribution pattern that includes a cutoff line which is defined by an upper end of the plurality of reflection elements, and light that is incident on the plurality of reflection elements is reflected toward the projection lens to thereby form a complementary l
Abstract: Provided is a hydrogen concentration measuring device capable of measuring with high accuracy a hydrogen concentration over an extensive range by a simple configuration. The device includes: a sensor chip which detects the electric resistance of a sensing film; an optical measurement unit which detects the transmitted light intensity of the film; and a controller. The controller performs measurement processing such that a hydrogen concentration in the gas atmosphere is measured based on the detected electric resistance in a first measurement range and based on the detected transmitted light intensity in a second measurement range and is determined so as to reduce a difference between the hydrogen concentration based on the detected electric resistance and the hydrogen concentration based on the detected transmitted light intensity in the overlap of the first measurement range and the second measurement range.
December 16, 2016
Date of Patent:
May 28, 2019
STANLEY ELECTRIC CO., LTD., TOKYO UNIVERSITY OF SCIENCE FOUNDATION
Abstract: An electro-chemical device having a cell thickness of 1 ?m-1000 ?m, comprising a first and a second substrate disposed to face each other, and having electrodes on facing surfaces, transparent electrolyte solution sandwiched between the first and the second substrates, containing electro-deposition material containing Ag, mediator, supporting electrolyte, and solvent, and having optical density not larger than 0.1 in visible light range of wavelength 400 nm-800 nm.
Abstract: A photo-detection device includes a substrate; a photo semiconductor element provided on the substrate; a first resin layer including first transparent resin, provided on the photo semiconductor element; and a second resin layer including second transparent resin provided on the substrate. The second resin layer is divided into a filler-including resin lower section including optical-shielding fillers, provided on the substrate and surrounding a sidewall of the photo semiconductor element, and a filler-excluding resin upper section excluding the optical-shielding fillers, provided on the filler-including resin lower section and surrounding at least a part of a sidewall of the first resin layer.
Abstract: To provide a technique capable of accurately obtaining the attitude of a vehicle in the pitch direction. A device controls the optical axis of a vehicular lamp in accordance with an attitude change in pitch direction of the vehicle having (a) an angle calculation part which obtains a first acceleration value, a second acceleration value, and a vehicle speed, at each predetermined time intervals respectively, calculates vehicle traveling direction acceleration based on the vehicle speed, further obtains a first slope and a second slope from the correlation between the vehicle traveling direction acceleration and the first and the second acceleration value respectively, and a vehicle attitude angle based on the ratio between the two slopes, and (b) an optical axis setting part which generates a control signal for controlling the optical axis of the lamp based on the vehicle attitude angle, and provides the control signal to the lamp.
Abstract: A vehicle lighting fixture capable of improving the visual recognizability when seen from its front oblique direction is provided. The vehicle lighting fixture includes: a light guide plate having a front light emission surface extending in a circular arc shape. A plurality of lens cut surfaces is formed in the front light emission surface to extend in a circular arc shape, the lens cut surfaces being recessed rearward and formed in a concentric manner. A structural body is provided to the rear surface thereof to diffuse and reflect light guided within the light guide plate in order for the light to exit through the front light emission surface. The light guide plate is formed in a substantially circular truncated conical shape where the light guide plate on an outer peripheral side is located rearward more than on an inner peripheral side.
Abstract: An n-type electrode includes a first electrode layer to be formed on an n-type group III nitride single crystal layer and a second electrode layer formed on the first electrode layer and in which at least the first electrode layer contains nitrogen atoms and oxygen atoms and an atomic ratio of the oxygen atoms to the nitrogen atoms is 0.2 or more and 2.0 or less.
Abstract: A lens body is provided which is disposed in front of a light source and configured to emit light forward from the light source along a forward/rearward reference axis extending in a forward/rearward direction of a vehicle, the lens body including an incidence part; a first reflecting surface configured to totally reflect light entering from the incidence part; a second reflecting surface configured to totally reflect at least some of the light totally reflected by the first reflecting surface; and a light emitting surface, wherein the first reflecting surface includes an elliptical spherical shape rotatably symmetrical with respect to a major axis extending in the forward/rearward direction, in first and second focal points constituted by the elliptical shape of the first reflecting surface, the second focal point disposed at a rear side between the first and second focal points is disposed in the vicinity of the light source, the second reflecting surface extends rearward from a point spaced a predetermined
Abstract: A lens body includes a first reflecting surface totally reflecting entered light, a second reflecting surface totally reflecting at least some of the light totally reflected at the first reflecting surface, and a light emitting surface emitting light passed through forward, wherein the first reflecting surface includes an elliptical spherical shape with reference to a front-focal point and a rear-focal point disposed parallel with each other in the forward/rearward direction, the rear-focal point disposed in a vicinity of a light source, the light emitting surface has a first leftward/rightward emission region and a second leftward/rightward emission region adjacent to the first leftward/rightward emission region in a leftward/rightward direction, the first leftward/rightward emission region refracts the entered light in a direction approaching a forward/rearward reference axis, and the second leftward/rightward emission region refracts at least some of the entered light in a direction getting away from the f