Light emitting module

Patent metadata

Field	Value
Publication number	US-9333905-B2
Application number	US-201414155631-A
Country	US
Kind code	B2
Filing date	Jan 15, 2014
Priority date	Jan 30, 2013
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

The light emitting module includes a plurality of light emitting elements; a fluorescent substance resin layer containing a fluorescent substance which is excited by light emitted from the plurality of light emitting elements to emit visible light; a reflective surface configured to reflect light emitted from the plurality of light emitting elements and the fluorescent substance resin layer; and a light guiding body layer provided between the reflective surface and the fluorescent substance resin layer, and configured to guide light emitted from the plurality of light emitting elements or the fluorescent substance.

First claim

What is claimed is:

1. A light emitting module comprising:
a plurality of light emitting elements;
a fluorescent substance resin layer containing a fluorescent substance which is excited by light emitted from the plurality of light emitting elements to emit visible light;
a reflective surface configured to reflect light emitted from the plurality of light emitting elements and the fluorescent substance resin layer;
a light guiding body layer provided between the reflective surface and the fluorescent substance resin layer, and configured to guide light emitted from the plurality of light emitting elements or the fluorescent substance; and
a scattering processing unit provided on at least one of the reflective surface and an interface between the fluorescent substance resin layer and the light guiding body layer, the scattering processing unit being configured to scatter a part of the light emitted from the plurality of light emitting elements and stepped in at least one of a hemispherical shape, an uneven shape, a trapezoidal shape, and a cone shape,
wherein the fluorescent substance of the fluorescent substance resin layer includes a yellow fluorescent substance and a blue fluorescent substance.

2. The light emitting module of claim 1 , wherein the light guiding body layer has a different refractive index from the fluorescent substance resin layer.

3. The light emitting module of claim 2 , wherein the light guiding body layer is made of a material having a higher refractive index than the fluorescent substance resin layer.

4. The light emitting module of claim 1 , wherein the plurality of light emitting elements are provided within the light guiding body layer.

5. The light emitting module of claim 2 , wherein the plurality of light emitting elements are provided within the light guiding body layer.

6. The light emitting module of claim 3 , wherein the plurality of light emitting elements are provided within the light guiding body layer.

7. The light emitting module of claim 1 , wherein at least a part of each of the plurality of light emitting elements is positioned within the fluorescent substance resin layer.

8. The light emitting module of claim 2 , wherein at least a part of each of the plurality of light emitting elements is positioned within the fluorescent substance resin layer.

9. The light emitting module of claim 3 , wherein at least a part of each of the plurality of light emitting elements is positioned within the fluorescent substance resin layer.

10. The light emitting module of claim 1 , wherein the plurality of light emitting elements are disposed in a predetermined two-dimensional shape, and are formed to be connected in line by at least one of the fluorescent substance resin layer and the light guiding body layer.

11. The light emitting module of claim 2 , wherein the plurality of light emitting elements are disposed in a predetermined two-dimensional shape, and are formed to be connected in line by at least one of the fluorescent substance resin layer and the light guiding body layer.

12. The light emitting module of claim 3 , wherein the plurality of light emitting elements are disposed in a predetermined two-dimensional shape, and are formed to be connected in line by at least one of the fluorescent substance resin layer and the light guiding body layer.

13. The light emitting module of claim 1 , wherein the fluorescent substance resin layer is formed as a fluorescent substance paste, by mixing the yellow fluorescent substance and the blue fluorescent substance with each other in a weight ratio 2:1, and mixing a mixed fluorescent substance in an amount of 1.8 vol % with a binder material made of a liquid or gel silicon resin.

Assignees

• Koito Mfg Co Ltd

Inventors

• Nomura Akihiro
• Sugimori Shogo

Classifications

• H10W90/00

  Package configurations · CPC title

• F21W2103/00

  Exterior vehicle lighting devices for signalling purposes · CPC title

• H10H20/882

  Scattering means (H10H20/82 takes precedence) · CPC title

• H10H20/851

  Wavelength conversion means · CPC title

• H01L25/0753

  Electricity · mapped topic