Toyoda Gosei Co., Ltd.

Naoki Yoshimura

Yuji Takahashi

Koichi Ota

Yoshinobu Suehiro

Hisaki Kato

Akira Mabuchi

Kanae Matsumura

Kuniyoshi Kondo

Kazuhiro Sakai

Tadashi Endo

Masakazu Komatsu

Mamoru Mitomo

A light emitting apparatus has a light emitting element with an emission wavelength in the range of 360 to 550 nm and a rare-earth element doped oxide nitride phosphor or cerium ion doped lanthanum silicon nitride phosphor. Part of light radiated from the light emitting element is wavelength-converted by the phosphor. The light emitting apparatus radiates white light generated by a mixture of the wavelength-converted light and the other part of light radiated from the light emitting element.

Light emitting apparatus and light emitting method

A novel configuration of a light-emitting apparatus that can emit white light, in which a primary light source composed of a group III nitride compound semiconductor is used in combination with a secondary light source including a fluorescent material which emits light of a green luminescent color when the fluorescent material is excited by light emitted from the primary light source. A tertiary light source for emitting red light may be further used in combination with the primary and secondary light sources.

Light-emitting apparatus

An alicyclic epoxy resin is used as a material for forming a member for sealing a Group III nitride compound semiconductor light-emitting device.

Light-emitting system with alicyclic epoxy sealing member

Growing community of inventors

Aichi-ken, Japan

Naoki Yoshimura