Light emitting device

Patent metadata

Field	Value
Publication number	US-9249963-B2
Application number	US-201214357091-A
Country	US
Kind code	B2
Filing date	Nov 1, 2012
Priority date	Nov 8, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

Disclosed is a light emitting device. The light emitting device includes a body having a cavity, a light emitting part in the cavity, a reflective layer on an inner surface of the cavity, and a light conversion layer adjacent to the reflective layer. The light emitting device includes a body having the cavity, a light emitting part in the cavity, and a light conversion part on a path of a light from the light emitting part. The light conversion part includes a first light conversion lens part, and a second light conversion lens part beside the first light conversion lens part.

First claim

The invention claimed is:

1. A light emitting device comprising:
a body having a cavity;
a light emitting part in the cavity;
a light conversion part on a path of a light from the light emitting part;
a first capping part interposed between the light emitting part and the light conversion part; and
a heat transfer part in the first capping part,
wherein the light conversion part comprises:
a first light conversion lens part; and
a second light conversion lens part beside the first light conversion lens part, and

wherein the heat transfer part includes a light transmissive part.

2. The light emitting device of claim 1 , wherein the first and second light conversion lens parts comprise a curved surface.

3. The light emitting device of claim 1 , wherein the first light conversion lens part converts the light from the light emitting part into a light having a first wavelength band, and the second light conversion lens part converts the light from the light emitting part into a light having a second wavelength band.

4. The light emitting device of claim 3 , wherein the light conversion part further comprises a third light conversion lens part provided beside the second light conversion lens part to convert the light from the light emitting part into a light having a third wavelength band.

5. The light emitting device of claim 1 , further comprising a second capping part covering the light conversion part, wherein the first capping part represents thermal conductivity higher than thermal conductivity of the second capping part.

6. The light emitting device of claim 4 , further comprising a transmissive region between the light conversion lens parts.

7. A light emitting device comprising:
a substrate;
a light emitting part on the substrate;
a heat radiation part covering the light emitting part; and
a light conversion part on the heat radiation part,
wherein the heat radiation part comprises:
a first heat conductive layer covering the light emitting part;
a first adiabatic layer on the first heat conductive layer;
a second heat conductive layer on the first adiabatic layer; and
a second adiabatic layer on the second heat conductive layer.

8. The light emitting device of claim 7 , wherein the first adiabatic layer covers a portion of a top surface of the first heat conductive layer, and
wherein the first heat conductive layer comprises:
a first heat transfer part corresponding to the first adiabatic layer; and
a first heat discharge part extending from the first heat transfer part and exposed from the first adiabatic layer.

9. The light emitting device of claim 8 , wherein the second adiabatic layer covers a portion of a top surface of the second heat conductive layer, and
wherein the second heat conductive layer comprises:
a second heat transfer part corresponding to the second adiabatic layer; and
a second heat discharge part extending from the second heat transfer part and exposed from the second adiabatic layer.

10. The light emitting device of claim 4 , wherein the heat transfer part includes a transparent layer.

Assignees

• Lg Innotek Co Ltd

Inventors

• Oh Jeong Taek
• Lee Yu Won

Classifications

• H10H20/8516

  having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer or wavelength conversion layer with a concentration gradient · CPC title

• H10H20/8514

  characterised by their shape, e.g. plate or foil · CPC title

• H10H20/8513

  having two or more wavelength conversion materials · CPC title

• H10H20/8583

  not being in contact with the bodies · CPC title

• H10H20/8515 Primary

  not being in contact with the bodies · CPC title