Toyoda Gosei Co., Ltd.

Tadashi Endo

Yuji Takahashi

Koichi Ota

Yoshinobu Suehiro

Koichi Kaga

Akihito Ota

Naoki Yoshimura

Mamoru Mitomo

Masakazu Komatsu

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 light-emitting device with an emission wavelength range of from 360 nm to 550 nm and a fluorescent material made of Ca&#x2014;Al&#x2014;Si&#x2014;O&#x2014;N oxynitride activated with Euare used so that a part of light emitted from the light-emitting device is emitted while the wavelength of the part of light is converted by the fluorescent material.

Light-emitting unit having specific fluorescent material

Growing community of inventors

Fukuoka-ken, Japan

Tadashi Endo