Kyocera Corporation

Akira Miyake

Kousuke Katabe

Daisuke Sakumoto

Shingo Matsuura

Yuki Mori

Tomoya Tabuchi

Emi Mukai

Takashi Sawai

Masayuki Mori

A light emission device includes a substrate, a light emission element, and a wavelength converter. The substrate has a first surface. The light emission element is mounted on the first surface and emits excitation light. The wavelength converter is positioned on at least a portion of the first surface and the light emission element. The wavelength converter converts the excitation light into illumination light. The substrate includes at least one of a recess or a projection. The recess has a second surface and a third surface. The second surface is positioned below the first surface. The third surface connects the second surface and the first surface to each other. The projection projects upward from the first surface. The wavelength converter is in contact with at least one of at least a portion of the second surface or at least a portion of the projection.

Light emission device and illumination apparatus

To improve the luminance of light emitted by a light-emitting device, the light-emitting device includes a base () that has an opening part () constituted by a light-reflecting surface () and a bottom surface (), a light-emitting chip () that is mounted on the bottom surface () of the opening part (), a transparent member () that covers the light-emitting chip (), and an optical member () that is disposed on the transparent member (). The transparent member () is disposed on the bottom surface () of the opening part () in a state where the transparent member () is spaced away from the light-reflecting surface () of the opening part ().

Light-emitting device

A light-emitting device includes a substrate, a pair of electrode layers disposed on the substrate, a light-emitting element disposed between the pair of electrode layers to keep a first space with each of the pair of electrode layers while electrically connecting with each of the pair of electrode layers, and a pair of reflection layers, each extending in overlapping relation from one to the other one of the pair of electrode layers as seen in a transparent plan view. The light-emitting element is disposed between the pair of reflection layers to keep a second space with each of the pair of reflection layers.

Light-emitting device with reflection layers

A light emitting device includes a base, a sub-mount substrate, and a frame member. The light emitting device further includes a light emitting element and a wavelength converting member. The sub-mount substrate is disposed on the base, and has an upper surface made of a ceramic sintered body. The frame member has a light reflecting portion made of porous ceramics, is disposed on the base, and surrounds the sub-mount substrate. The light emitting element is mounted on the sub-mount substrate. The wavelength converting member covers the light emitting element and the light reflecting portion of the frame member.

Light emitting device and illumination device

A light emitting device includes a base on which a wiring conductor is formed from the top surface to the bottom surface or the side face; a light emitting chip mounted on the top surface of the base and electrically connected with the wiring conductor; a first light transmitting member which covers the light emitting chip; a second light transmitting member provided above the first light transmitting member to cover the first light transmitting member, the second light transmitting member being formed of a light transmitting material containing fluorescent materials for converting in wavelength the light emitted from the light emitting chip; and a third light transmitting member provided between the first and second light transmitting members, wherein the refractive index nof the first light transmitting member, the refractive index nof the second light transmitting member and the refractive index nof the third light transmitting member satisfy the relation: n&#x3c;nand n&#x3c;n, thereby achieving higher light extraction efficiency, higher optical intensity of radiation, and higher axial luminosity and brightness.

Growing community of inventors

Higashiomi, Japan

Akira Miyake