Nichia Corporation

Yohei Kawano

Kohei Shima

Akira Asano

A light source unit includes light-emitting elements, a light-shielding body, and a rod lens including a first end surface, a second end surface, and a side surface. The light-shielding body is separated from the side surface, covers the side surface, includes an opening exposing at least a portion of the second end surface, and includes a tip protruding further than the second end surface in a first direction from the first end surface toward the second end surface. A first plane crosses the first direction and is at the same first-direction position as the tip. A second plane crosses the first direction and is at the same position as the second end surface or between the tip and second end surface in the first direction. A first surface area of the opening at the first plane is greater than a second surface area of the opening at the second plane.

Light source unit, light source module, and lighting device

A light-emitting device includes an optical member including first and second light emitting elements, first and second light condenser portions, and a light guide portion. The first light condenser portion is disposed at a position corresponding to the first light-emitting element, and condenses a portion of light emitted from the first light-emitting element. The second light condenser portion surrounds the first light condenser portion, and condenses a portion of the light that is not incident to the first light condenser portion among the light emitted from the first light-emitting element. The light guide portion is disposed at a periphery of the second light condenser portion and at a position corresponding to the second light-emitting element, and guides light emitted from the second light-emitting element by causing total reflection in an interior of the light guide portion. A full width at half maximum of light exiting from the light guide portion is larger than a full width at half maximum of light exiting from the first light condenser portion.

Light-emitting device, lighting device, and optical member

A light-emitting device includes a concentrator, a first tubular body surrounding the concentrator, one or more first light-emitting elements disposed at a position corresponding to the concentrator, and a plurality of second light-emitting elements. The first tubular body is transparent. The first tubular body has a plurality of recesses formed in an end portion of the first tubular body. Portions of the first tubular body between the recesses form light guide portions. The plurality of second light-emitting elements are disposed at positions corresponding to a plurality of the light guide portions.

A light pipe includes an emission end portion with a light exit surface and a back surface opposite the light exit surface; a columnar light-guide portion protruding from the back surface; and at least one annular light-guide portion protruding from the back surface and concentrically surrounding the columnar light-guide portion; and a gap separating the annular light-guide portion and the columnar light-guide portion. An illumination device includes a light source unit having an annular array of light emitting diodes; a reflector; and the light pipe positioned between the light source unit and the reflector.

Growing community of inventors

Tokushima, Japan

Yohei Kawano