Nichia Corporation

Takao Kosugi

Hiroto Tamaki

Tadao Hayashi

Daisuke Oyamatsu

Takafumi Sugiyama

Takayoshi Wakaki

Yoshiki Sato

Jun Kawamata

Daisuke Sanga

Kunihito Sugimoto

Dai Wakamatsu

Takuya Okada

Keisuke Sejiki

A wavelength converting device includes a heat dissipating member, a wavelength converting member, and a connecting member. The wavelength converting member is disposed on the heat dissipating member and contains a fluorescent material and a holding body including aluminum oxide, magnesium oxide, zirconium oxide, lutetium oxide, titanium oxide, chromium oxide, tungsten oxide, divanadium pentoxide, molybdenum trioxide, sodium oxide, yttrium oxide, silicon dioxide, boron oxide, or diphosphorus pentoxide. The connecting member contains a metal material and connecting the heat dissipating member and the wavelength converting member. The wavelength converting member includes an upper surface, side surfaces, and a lower surface. The connecting member is thermally connected to the side surfaces and the lower surface of the wavelength converting member.

Wavelength converting device

A wave-length conversion inorganic member can includes a base body and an inorganic particle layer on the base body. The inorganic particle layer can include particles of an inorganic wave-length conversion substance which is configured to absorb light of a first wave-length and to emit light of a second wave-length different from the first wave-length. The inorganic particle layer can include an agglomerate of a plurality of the particles. Each of the plurality of the particles are in contact with at least one of the other particles or the base body. A cover layer comprises an inorganic material, and the cover layer continuously covers a surface of the base body and surfaces of the particles. The inorganic particle layer has an interstice enclosed by the particles, or by the particles and one of the base body and the cover layer.

Wave-length conversion inorganic member, and method for manufacturing the same

(Problem to be Solved) To provide a wavelength converting device which can efficiently exhaust heat from the wavelength converting member using a heat dissipating member. (Solution) The wavelength converting device includes a heat dissipating member, a wavelength converting member disposed on the heat dissipating member, and a connecting member which connects the heat dissipating member and the wavelength converting member. Particularly, the wavelength converting member includes an upper surface, side surfaces, and a lower surface, and the connecting member is thermally connected to the side surfaces and the lower surface of the wavelength converting member.

The light emitting device comprising a light emitting element; and a wavelength converting member having a first face and a second face, in which light emitted from the light emitting element enters in through the first face, and a part of the second face serves as a light emitting face, wherein the light emitting element further comprises a reflection control structure around the light emitting face of the second face, and the reflection control structure comprises a reflection film on the wavelength converting member and an anti-reflection film on the reflection film.

Light emitting device

Growing community of inventors

Anan, Japan

Takao Kosugi