Stanley Electric Patente

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A semiconductor light emitting element (10) includes: a pit formation layer having a pyramidal pit caused by a threading dislocation (TD) generated in the first semiconductor layer; an active layer (14); and an electron blocking layer (15) formed on the active layer to cover the recess portion. The active layer is formed on the pit formation layer and having an embedded portion formed so as to embed the pit and a recess portion formed on a surface of the embedded portion to correspond to the pit. The recess portion (RC) of the active layer has an apex formed at a position existing in a layered direction of the active layer within the active layer.

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There is provided a light-emitting element which includes a first semiconductor layer, a second semiconductor layer having an electrical conductivity that is different from that of the first semiconductor layer and an active layer disposed between the first and second layers, and a first and second electrodes respectively disposed on surfaces of the first and second semiconductor layers. The first electrode comprises a plurality of electrode pieces separated from each other; and each of the electrode pieces comprises a power feed pad, and an extended portion connected to the pad and that extends in a direction away from the pad, and a terminal end portion of the extended portion of an electrode piece is opposed to a terminal end portion of the extended portion of the other electrode piece across a gap.

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Vehicle lighting unit (10) allows the brightnesses of light observed through vertically arranged lenses to substantially match when the lenses are viewed from a certain viewpoint. A first reflector (13) includes a revolved ellipsoidal reflector having a first focal point (F1 13 ) at or near a semiconductor light-emitting device (12) and a second focal point (F2 13 ) at or near the vehicle rear-side focal point of a first lens (11A), and a second reflector (15) includes a revolved ellipsoidal reflector having a first focal point (F1 15 ) at or near the semiconductor light-emitting device (12) and a second focal point (F2 15 ) between the second reflector (15) and a third reflector (16). The third reflector (16) is inclined at an upward angle such that light emitted from the semiconductor light-emitting device (12), reflected by the second reflector (15), focused at the second focal point (F2 15 ) of the second reflector (15), reflected by the third reflector (16), and passing through the second lens (11B) is directed at a predetermined upward angle.

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A lighter and smaller light-emitting device (for use in a vehicle lighting unit) using a light-emitting body (13) and a manufacturing method of the light-emitting body (13) are provided. The light-emitting device can include a light source (14) configured to emit light for excitation, and a light-emitting body (13) configured to absorb excitation light to emit fluorescence light. The light-emitting body (13) can include: a first light-transmitting member (30a) with a plate shape and having a first surface (13a), a second surface (13b) opposite to the first surface (13a), and an outer peripheral surface between the first surface (13a) and the second surface (13b); a phosphor layer (31) disposed on the outer peripheral surface of the first light-transmitting member (30a); a second light transmitting member (30b) disposed on an outer peripheral surface of the phosphor layer (31); and a light-shielding member (15) (such as a reflection film) configured to cover the first surface (13a). In this light-emitting device, the light source (14) can be disposed such that the excitation light therefrom can be incident on the second surface (13b), pass through the first light-transmitting member (30a), and reach the phosphor layer (31).

A semiconductor light emitting apparatus includes semiconductor lamination of n-type layer, active layer, and p-type layer; recess penetrating the lamination from the p-type layer and exposing the n-type layer; n-side electrode formed on the n-type layer at the bottom of the recess and extending upward above the p-type layer; a p-side electrode formed on the p-type layer and having an opening surrounding the recess in plan view, the n-side electrode extending from inside to above the recess; and an insulating layer disposed between the p-side and the n-side electrodes on the p-type layer, the p-side electrode constituting a reflective electrode reflecting light incident from the active layer, the n-side electrode including a reflective electrode layer covering the opening in plan view and reflects light incident from the emission layer side, the reflective electrode layer having peripheral portion overlapping peripheral portion of the p-side electrode in plan view.

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A vehicle lamp (10) is provided, which is capable of changing the clearness of a contrast boundary line (CL1, CL2) correspondingly to a traveling state or a traveling environment of a vehicle (V0). The vehicle lamp (10) is mounted in a vehicle (V0) and configured to form a prescribed light distribution pattern including a contrast boundary line (CL1, CL2), the vehicle lamp (10) including: a sensor (12, 20) provided in the vehicle (V0); and a clearness control unit (16) configured to change clearness of the contrast boundary line (CL1, CL2) correspondingly to a detection result of the sensor (12, 20).

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A light source apparatus having a plurality of light-emitting device arrays, each extending in a first direction and adjacently disposed in a second direction that crosses the first direction is disclosed. Each of the plurality of light-emitting device arrays comprises a plurality of light-emitting devices arranged along the first direction and is the same in length. Among the plurality of light-emitting device arrays, the number of the respective light-emitting devices of a first light-emitting device array at one end in a second direction is smaller than the number of the respective light-emitting devices of a second light-emitting device array adjacent to the first light-emitting device array. The surface area of the light-emitting units of the respective light-emitting devices of the first light-emitting device array is larger than that of the light-emitting units of the respective light-emitting devices of the second light-emitting device array adjacent to the first light-emitting device array.

A headlight controller, an optical unit (20L, 20R) and a vehicle headlight can include a headlight controller and an optical unit (20L, 20R). The headlight controller can include a system controller (11) and a camera (10) photographing vehicles located in a forward direction thereof, and the system controller (11) can be configured to output a control signal to provide various favorable light distribution patterns by using image data output from the camera (10) in accordance with traffic conditions. The optical unit (20L, 20R) can be configured to emit beam lights each having a light-emitting angle using lights emitted from first and second white LEDs (LED1-LED7) via a projector lens (41) so that the beam lights can be used as a high and low beam without movable parts. Thus, the disclosed subject matter can include providing vehicle headlights that can form various favorable light distribution patterns by utilizing the characteristics of the controller and the optical unit (20L, 20R) in accordance with the traffic conditions.