Light emitting device

Patent metadata

Field	Value
Publication number	US-2017317469-A1
Application number	US-201715499021-A
Country	US
Kind code	A1
Filing date	Apr 27, 2017
Priority date	Apr 28, 2016
Publication date	Nov 2, 2017
Grant date	—

Abstract

A light-emitting device includes: a base having a depressed portion upwardly opening, the depressed portion having a bottom surface, surrounding surfaces and at least one placement surface disposed at a position higher than the bottom surface; at least one semiconductor laser element mounted on or above the bottom surface; and a wavelength conversion member enclosed in the depressed portion to convert a wavelength of light from the at least one semiconductor laser element, the wavelength conversion member having a lower surface disposed on the at least one placement surface and a circumferential edge partly surrounded by the surrounding surfaces.

First claim

What is claimed is:

1 . A light-emitting device comprising:
a base having a depressed portion upwardly opening, the depressed portion having a bottom surface, surrounding surfaces and at least one placement surface disposed at a position higher than the bottom surface; at least one semiconductor laser element disposed on or above the bottom surface; and a wavelength conversion member enclosed in the depressed portion to convert a wavelength of light emitted from the at least one semiconductor laser element, the wavelength conversion member having a lower surface disposed on the at least one placement surface and a circumferential edge partly surrounded by the surrounding surfaces.

2 . The light-emitting device according to claim 1 ,
wherein in a plan view, the wavelength conversion member is substantially rectangular and has a first corner and a second corner that are opposed to each other, and wherein the surrounding surfaces have at least one first surrounding surface to surround the first corner and at least one second surrounding surface to surround the second corner.

3 . The light-emitting device according to claim 1 , further comprising at least one wiring layer,
wherein the depressed portion has at least one connecting surface at a position higher than the bottom surface and lower than the at least one placement surface, and each of the at least one wiring layer is disposed on each of the at least one connecting surface.

4 . The light-emitting device according to claim 1 , further comprising a reflective member disposed directly under the wavelength conversion member and on the bottom surface so as to reflect the light emitted from the at least one semiconductor laser element.

5 . The light-emitting device according to claim 1 ,
wherein the wavelength conversion member has:
a light-shielding holding member having a through hole; and
a fluorescent-material-containing member containing a fluorescent material and disposed in the through hole.

6 . The light-emitting device according to claim 1 , further comprising a lid covering an opening of the depressed portion, the lid having a light-transmissive member to transmit light from the wavelength conversion member.

7 . The light-emitting device according to claim 6 ,
wherein the lid has a light-shielding holding member having a through hole to pass the light from the wavelength conversion member, and wherein the light-transmissive member is secured to the light-shielding holding member of the lid so as to cover the through hole of the light-shielding holding member of the lid.

Assignees

• Nichia Corp

Inventors

• Kiyota Seiji

Classifications

• H01S5/02296

  Electricity · mapped topic

• H01S5/02276

  Electricity · mapped topic

• H01S5/02292 Primary

  Electricity · mapped topic

• H01S5/0087

  for illuminating phosphorescent or fluorescent materials, e.g. using optical arrangements specifically adapted for guiding or shaping laser beams illuminating these materials · CPC title

• H01S5/02257 Primary

  using windows, e.g. specially adapted for back-reflecting light to a detector inside the housing · CPC title