Abstract: Provided is an optical scanning device capable of preventing abnormal vibration occurring in a micro mirror. The optical scanning device includes a micro mirror that reflects light beams, torsion bars that rotate the micro mirror around a Y-axis, a movable frame that is disposed around the micro mirror, and meander-type piezoelectric actuators that rotate the micro mirror around an X-axis. The movable frame has a rectangular shape, and has a rib provided on the rear surface of the movable frame. Corner regions of four corners of the movable frame have a removal region where no rib is partially provided or a rib with a thickness thinner than other regions is provided.

Abstract: An eyeglass-type video display device includes a video generation device and an eyeglass body. The video generation device includes a MEMS optical deflector and a VCSEL mounted on the same substrate, and a planar mirror and a rotating mirror arranged above the substrate. Light emitted from an emission part is emitted obliquely upward from one longitudinal-direction end side of the substrate through the planar mirror, the rotating mirror, and a revolving mirror. The video generation device is attached to an arm of the eyeglass body such that the emission direction of the light becomes a direction that is obliquely forward with respect to an inner side surface of the arm.

Abstract: Semiconductor light emitting elements are configured to be mounted on the substrate, a frame is configured to be vertically provided on the substrate in an annular or oval-annular shape so as to surround the semiconductor light emitting elements, and a sealing portion is configured to seal an inner wall of the frame, an upper surface of the substrate inside the frame, and the semiconductor light emitting elements. The sealing portion includes a first resin portion configured to have a concave surface having at least one rotational plane having a central axis of the frame as a rotational axis, and a second resin portion configured to cover the concave surface of the first resin portion and having a convex external surface, and the sealing portion has an external surface in which an external surface of the first resin portion and an external surface of the second resin portion are integrated.

Abstract: To improve pedestrian visibility. Provided is a headlight controller connectable to a first headlight and a second headlight spaced apart in a vehicle width direction at the front of the vehicle, the headlight controller including: a rainfall amount detection means installed in the vehicle; and a controller installed in the vehicle, where the controller is connected to the rainfall amount detection means, and the controller carries out control such that when rainfall amount detected by the rainfall amount detection means is equal to or more than a predetermined value, irradiation light from the first headlight becomes relatively darker than irradiation light from the second headlight.

Abstract: To accurately identify positions of preceding vehicles. A vehicle position identification apparatus having a controller, where the controller (a) acquires position data of each forward vehicle, each position data including a left side position and a right side position of each forward vehicle, and (b) for each position data at a first time and a second time, associates the left side position with a first axis and the right side position with a second axis and obtains a distance between each of the position data on coordinates, or obtains the amount of change in the left side position along the first axis and the amount of change in the right side position along the second axis, and based on the distance or each of the amount of change, identifies a correspondence relationship between each of the position data and each forward vehicle and generates data which indicates the correspondence relationship.

Abstract: An optical scanning device includes a standing plate part which has an inclined groove and a through hole at positions above a vertical cavity surface emitting laser (VCSEL) and a micro electro mechanical systems (MEMS) optical deflector, and which is fixed to a substrate. A plate-shaped mirror and a rotary mirror have one end portions thereof in the Y-axis direction supported by the inclined groove and the through hole, respectively. The through hole has the shape of a rotating body having an axis in the Y-axis direction as the centerline thereof.

Abstract: To make it possible to grasp the road surface condition more reliably when the road surface on which the irradiation pattern is formed is captured by a camera. A controller for lighting control installed in a vehicle that is equipped with a camera that captures the surroundings of the vehicle, a monitor that displays images captured by the camera, and an irradiation unit capable of irradiating light on a road surface within a range that can be captured by the camera, and in which the controller performs operation control of the irradiation unit, where the controller performs operation control of the irradiation unit so that it prevents the irradiation unit from performing light irradiation during each intermittently occurring capturing period of the camera, and causes the irradiation unit to irradiate light during a non-capturing period between the capturing periods.

Abstract: An optical device includes a metal reflective layer substantially made of a metal material, a first light transmissive layer disposed on the metal reflective layer, an optical multilayer reflective film disposed on the first light transmissive layer and including a plurality of sublayers stacked on each other and having different refractive indexes, and a wavelength converting layer disposed on the optical multilayer reflective film and containing a fluorescent material capable of absorbing incident excitation light and generating fluorescent light having a lower energy. The wavelength converting layer is capable of generating mixed light containing the excitation light and the fluorescent light in response to irradiation with the excitation light.

Abstract: A light emitting device includes a semiconductor light emitting element which emits excitation light having a peak wavelength in a range of 440 to 450 nm and a fluorescent body layer which is provided on the semiconductor light emitting element, is excited by the excitation light from the semiconductor light emitting element, and contains a first fluorescent body and a second fluorescent body which emit first fluorescent light and second fluorescent light. The first fluorescent light has a peak wavelength in a range of 540 to 575 nm, and the second fluorescent light has a peak wavelength in a range of 590 to 605 nm. In mixed color light of the radiation light, the intensity of the radiation light of the semiconductor light emitting element is 1/10 to 1/60 of the intensity of the combined light of the radiation light from the first fluorescent body and the second fluorescent body.

Abstract: A liquid crystal element includes a first substrate, a second substrate arranged to face the first substrate, a first pixel electrode corresponding to a first pixel region arranged on the first substrate on the second substrate side, a second pixel electrode corresponding to a second pixel region arranged on the first substrate on the second substrate side, a common electrode arranged on the first substrate side of the second substrate, and a liquid crystal layer arranged between a group of the first and second pixel electrodes and the common electrode, where the first pixel electrode and the second pixel electrode are provided on different layers on the first substrate, and their ends are arranged so as to partially overlap each other in a plan view.

Abstract: A vehicle has a function of drawing a notification display on a road surface with light. In a case where a shift position of the vehicle is a P range and a switch for turning off the drawing is selected, it is permitted to turn off the light of the drawing of the notification display. As another condition, in a case where there is no approaching object around the vehicle when the vehicle moves rearward and the switch for turning off the drawing is selected, it is permitted to turn off the light of the drawing of the notification display.

Abstract: A semiconductor light emitting device includes a semiconductor light emitting laminate, and an SOI substrate including an upper semiconductor layer, an interlayer insulating film, and a lower semiconductor layer. The SOI substrate includes a first wiring electrode provided on the upper semiconductor layer through an insulating film and corresponding to a p-electrode, a second wiring electrode connected to the upper semiconductor layer and corresponding to an n-electrode, an anode that is provided on the lower semiconductor layer and connected to a first wiring electrode by a first via electrode passing through the SOI substrate, a cathode that is provided on the lower semiconductor layer through an insulating film and connected to the upper semiconductor layer by a second via electrode reaching the upper semiconductor layer. The p-electrode and the n-electrode are respectively bonded to the first wiring electrode and the second wiring electrode.

Abstract: To reduce uneven brightness of light irradiated from a vehicle lighting system. The system includes a lamp unit and a control unit where the lamp unit includes: a light source that emits light; a liquid crystal element using the light emitted from the light source to form irradiation light; and a lens projecting the irradiation light; where the light from the light source enters the element at an angle including a direction inclined from the normal of a light incident surface of the element; where the light incident surface has a first region in which most light enters from a viewing direction of the element and a second region in which most light enters from other directions, and where the control unit drives the element by setting a first voltage of the first region to be low and setting a second voltage of the second region to be high.

Abstract: A piezoelectric element includes: a Pt film for a lower electrode provided on a plane of a Si substrate; a PZT film provided on the Pt film; and a Pt film for an upper electrode provided on the PZT film. The PZT film includes a perpendicularly oriented part having a c-axis in a direction perpendicular to the Pt film, and an obliquely oriented part having a c-axis inclined with respect to the c-axis of the perpendicularly oriented part. The c-axis distribution of the obliquely oriented part is discrete with respect to the c-axis distribution of the perpendicularly oriented part.

Abstract: An object of the present invention is to provide an ultraviolet semiconductor light-emitting element that allows a user to easily confirm whether or not it is driven to emit the deep ultraviolet light. An ultraviolet semiconductor light-emitting element according to the present invention includes a single crystal AlN substrate, an n-type AlGaN layer, an active layer, and a p-type AlGaN layer. The n-type AlGaN layer is formed on the single crystal AlN substrate. The active layer is formed on the n-type AlGaN layer. The active layer has a light emission peak wavelength of 250 nm or more and 280 nm or less. The p-type AlGaN layer is formed on the active layer. The C concentration in the single crystal AlN substrate is 3×1017 atoms/cm3 or more.

Abstract: A semiconductor light-emitting device includes a translucent substrate, a row of light-emitting elements on the substrate, an insulating layer, and first and second electrode pads. Each light-emitting element includes a first semiconductor layer of a first conductivity type formed on the substrate, a light-emitting layer formed on the first semiconductor layer, a second semiconductor layer of opposite conductivity type formed on the light-emitting layer, a first electrode on the first semiconductor layer, and a second electrode on the second semiconductor layer. The insulating layer covers the light-emitting elements so as to form a first opening and a second opening. The first opening exposes the first electrode of the light-emitting element in one end side of the row of light-emitting elements. The second opening exposes the second electrode of the light-emitting element in another end side of the row of light-emitting elements.

Abstract: A light deflector 130 includes: a control unit 106 configured to generate a resonant drive signal for resonantly driving an MEMS mirror 133, and a non-resonant drive signal for non-resonantly driving the MEMS mirror 133; a resonant sensor 144 configured to detect the resonant drive of the MEMS mirror 133 and generate a resonant sensor signal; and a sensor signal processing unit 103 configured to acquire a phase difference between the resonant drive signal generated by the control unit 106 and the resonant sensor signal, in a case where the MEMS mirror 133 is resonantly driven in a Y-axis direction, also the MEMS mirror 133 is non-resonantly driven in an X-axis direction, and scanning is performed. The control unit 106 calculates an amplitude of the non-resonant drive of the MEMS mirror 133 on the basis of a change in the above phase difference.

Abstract: A method for manufacturing a GaN-based surface-emitting laser by an MOVPE includes: (a) growing a first cladding layer with a {0001} growth plane; (b) growing a guide layer on the first cladding layer; (c) forming holes in a surface of the guide layer by etching, the holes being two-dimensionally periodically arranged within a plane parallel to the guide layer; (d) etching the guide layer by using an etchant having selectivity to the {0001} plane and a {10?10} plane of the guide layer; (e) supplying a gas containing a nitrogen source to cause mass transport without supplying a group-III material gas, and then supplying the group-III material gas for growth, whereby a first embedding layer closing openings of the holes is formed to form a photonic crystal layer; and (f) growing an active layer and a second cladding layer in this order on the first embedding layer.

Abstract: A lighting tool for a vehicle includes light source and light guide body that guides light emitted from the light source, and the light guide body has first light guide portion disposed in front of the light source, second light guide portion that is branched off from the first light guide portion and that extends so as to go around toward a side of the light source, incidence portion that is located on a back surface side of the first light guide portion and that is configured to cause the light emitted from the light source to enter the inside of the first light guide portion, and side emitting portion that is located on a side of the first light guide portion facing the second light guide portion and that is configured to emit some of the light entered from the incidence portion toward the second light guide portion.

Abstract: A semiconductor light emitting device includes: a light emitting element assembly including a semiconductor light emitting element including a support substrate and a light emitting semiconductor layer provided on the support substrate, and a light guide member adhered to the semiconductor light emitting element by an element adhesive layer; and a first coating film adhered to a side surface of the light emitting element assembly by a side wall adhesive layer and formed of an inorganic material, which is a light reflector configured to cover the side surface.