Lighting module and lighting device comprising same

Patent metadata

Field	Value
Publication number	US-11828969-B2
Application number	US-202217986227-A
Country	US
Kind code	B2
Filing date	Nov 14, 2022
Priority date	Mar 22, 2019
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A lighting device disclosed in an embodiment of the invention includes a substrate; a plurality of light emitting devices on the substrate; a first reflective layer on the substrate; a resin layer on the first reflective layer; and a second reflective layer on the resin layer. The resin layer includes a first surface from which light emitted from the plurality of light emitting devices is emitted, and a second surface opposite to the first surface, wherein the first surface of the resin layer includes a first exit surface having a first curvature, and a second exit surface having a flat surface or a second curvature, wherein a maximum distance from the second surface to the first exit surface may be greater than a maximum distance from the second surface to the second exit surface.

First claim

What is claimed is:

1. A lighting device comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate;
a first reflective layer disposed on the substrate;
a resin layer disposed on the first reflective layer; and
a second reflective layer disposed on the resin layer,
wherein the resin layer includes a first surface from which light emitted from the plurality of light emitting devices is emitted, and a second surface opposite to the first surface,
wherein the resin layer includes a third surface and a fourth surface opposite to the third surface,
wherein the resin layer is disposed between the first reflective layer and the second reflective layer,
wherein the third surface of the resin layer is disposed on the first reflective layer,
wherein the second reflective layer is disposed on the fourth surface of the resin layer,
wherein the plurality of light emitting devices includes a first light emitting device disposed in a first row and a second light emitting device disposed in a second row,
wherein the first surface of the resin layer includes a first exit surface facing to the first light emitting device and having a first curvature, and a second exit surface facing to the second light emitting device and having a flat surface or a second curvature,
wherein a plurality of first light emitting devices is arranged in the first row, and
wherein a plurality of second light emitting devices is arranged in the second row.

2. The lighting device of claim 1 ,
wherein the first exit surface has a same thickness as a thickness of the resin layer.

3. The lighting device of claim 2 ,
wherein the first exit surface is disposed between the first reflective layer and the second reflective layer.

4. The lighting device of claim 1 , wherein the second exit surface has a same thickness as a thickness of the resin layer.

5. The lighting device of claim 4 ,
wherein the second exit surface is disposed between the first reflective layer and the second reflective layer, and
wherein a minimum distance between the first surface and the second surface is greater than the thickness of the resin layer.

6. The lighting device of claim 1 ,
wherein the resin layer includes a convex portion having the first exit surface,
wherein the convex portion includes an upper surface on which the third surface extends flat.

7. The lighting device of claim 6 ,
wherein the convex portion includes a lower surface on which the third surface extends flat.

8. The lighting device of claim 7 ,
wherein a thickness of the convex portion is equal to an interval between the first reflective layer and the second reflective layer.

9. The lighting device of claim 1 ,
wherein the resin layer includes a plurality of convex portions having the first exit surface, respectively,
wherein the plurality of convex portions is disposed between the first reflective layer and the second reflective layer.

10. A lighting device comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate;
a first reflective layer disposed on the substrate;
a resin layer disposed on the first reflective layer; and
a second reflective layer disposed on the resin layer,
wherein the resin layer includes a first surface from which light emitted from the plurality of light emitting devices is emitted, and a second surface opposite to the first surface,
wherein the resin layer includes a lower surface and an upper surface opposite to the lower surface,
wherein the resin layer is disposed between the first reflective layer and the second reflective layer,
wherein the lower surface of the resin layer is disposed on the first reflective layer,
wherein the second reflective layer is disposed on the upper surface of the resin layer,
wherein the plurality of light emitting devices is arranged in at least one row,
wherein the first surface includes a plurality of first light exit surfaces facing each of the plurality of light emitting devices, and at least one second exit surface disposed between the plurality of first light exit surfaces,
wherein each of the plurality of first exit surfaces includes a convex surface,
wherein the resin layer includes a plurality of convex portions having each of the plurality of first exit surfaces, and
wherein each of the plurality of convex portions includes a flat upper surface extending from the upper surface of the resin layer and a flat lower surface extending from the lower surface of the resin layer.

11. The lighting device of claim 10 ,
wherein each of the plurality of first exit surfaces has a same thickness as a thickness of the resin layer.

12. The lighting device of claim 11 ,
wherein each of the plurality of convex portions is disposed between the first reflective layer and the second reflective layer.

13. The lighting device of claim 10 ,
wherein the second exit surface has a same thickness as a thickness of the resin layer.

14. The lighting device of claim 13 ,
wherein the second exit surface is disposed between the first reflective layer and the second reflective layer.

15. The lighting device of claim 10 ,
wherein the second surface is disposed between the first reflective layer and the second reflective layer and has a same thickness as a thickness of the resin layer.

16. The lighting device of claim 10 ,
wherein the upper surface of each of the plurality of convex portions has a hemispherical shape.

17. The lighting device of claim 16 ,
wherein the lower surface of each of the plurality of convex portions has a hemispherical shape.

18. The lighting device of claim 10 ,
wherein the upper surface and the lower surface of each of the plurality of convex portions are parallel,
wherein a minimum distance between the first surface and the second surface is greater than a thickness of the resin layer.

19. The lighting device of claim 10 ,
wherein the second convex surface has a flat surface or a second curvature.

20. A lighting device comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate;
a first reflective layer disposed on the substrate;
a resin layer disposed on the first reflective layer; and
a second reflective layer disposed on the resin layer,
wherein the resin layer includes a first surface from which light emitted from the plurality of light emitting devices is emitted, and a second surface opposite to the first surface,
wherein the resin layer includes a third surface and a fourth surface opposite to the third surface,
wherein the resin layer is disposed between the first reflective layer and the second reflective layer,
wherein the third surface of the resin layer is disposed on the first reflective layer,
wherein the second reflective layer is disposed on the fourth surface of the resin layer,
wherein the plurality of light emitting devices includes a first light emitting device disposed in a first row and a second light emitting device disposed in a second row,
wherein the first surface of the resin layer includes a first exit surface facing to the first light emitting device and having a first curvature, and a second exit surface facing to the second light emitting device and having a flat surface or a second curvature,
wherein the first exit surface has a same thickness as a thickness of the resin layer.

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Seong Jin
• Choi Hyun Ho

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/853

  characterised by their shape · CPC title

• H10H29/142

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10H20/814

  having reflecting means, e.g. semiconductor Bragg reflectors · CPC title

• H10H20/856

  Reflecting means · CPC title