Nichia Corporation

Kohei Shima

Yohei Kawano

Akira Asano

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.

Growing community of inventors

Tokushima, Japan

Kohei Shima