Abstract: A lighting apparatus that, despite using an optical element whose front and back surfaces are both flat, can efficiently diffuse illumination light of a semiconductor light-emitting element to prevent luminance unevenness and the like is provided. The lighting apparatus includes: a base member (30, 45, 54); a semiconductor light-emitting element (62) fixed to the base member; and an optical element (70) whose surface (70b) facing the semiconductor light-emitting element and surface (70a) on an opposite side to the semiconductor light-emitting element are flat surfaces parallel to each other, wherein the optical element has a plurality of at least either recesses (71, 72) or through holes, in at least one of the facing surface and the opposite surface.

Abstract: A semiconductor light-emitting element mounting module includes a metal conductor plate including at least one connection surface formed on one side thereof, wherein a semiconductor light-emitting element is connectable to the connection surface; a pair of terminals provided away from the connection surface and which are connectable to the connection surface to be electrically conductive therewith; a surface-insulation portion formed from a resin material, wherein the surface-insulation portion covers the entire surface of the metal conductor plate except for the connection surface. The pair of terminals are connectable with a corresponding pair of terminals that are provided on another semiconductor light-emitting element mounting module.

Abstract: A connector including a receptacle connector and a plug connector. The receptacle connector includes a receptacle insulator in which an accommodation recess is formed, and receptacle contacts mounted on a circuit board, supported by the receptacle insulator. The plug connector includes a plug insulator which is accommodated in the accommodation recess, plug contacts which are supported by the plug insulator, and cables, one ends of which are connected to the plug contacts. Each receptacle contact includes a bifurcated connecting portion. Each plug contact includes a contacting portion held between a bifurcated connecting portion. Engaging/holding grooves are formed on a portion of the plug insulator which faces a bottom surface of the accommodation recess. Each contacting portion is shaped into a flat plate which projects in an opposite direction to that of the other ends of the cables. The receptacle contacts are orientated in a common direction.

Abstract: A connector including a receptacle connector and a plug connector. The receptacle connector includes a receptacle insulator in which an accommodation recess is formed, and receptacle contacts mounted on a circuit board, supported by the receptacle insulator. The plug connector includes a plug insulator which is accommodated in the accommodation recess, plug contacts which are supported by the plug insulator, and cables, one ends of which are connected to the plug contacts. Each receptacle contact includes a bifurcated connecting portion. Each plug contact includes a contacting portion held between a bifurcated connecting portion. Engaging/holding grooves are formed on a portion of the plug insulator which faces a bottom surface of the accommodation recess. Each contacting portion is shaped into a flat plate which projects in an opposite direction to that of the other ends of the cables. The receptacle contacts are orientated in a common direction.