Light module and lighting device having same

Patent metadata

Field	Value
Publication number	US-10753546-B2
Application number	US-201716098645-A
Country	US
Kind code	B2
Filing date	Apr 28, 2017
Priority date	May 4, 2016
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

A lighting module disclosed in an embodiment comprises: a substrate; a light-emitting element arranged on the substrate; and a resin member arranged on the substrate and the light-emitting element. The resin member comprises a plurality of side surfaces and an exit surface on the upper portion thereof. The plurality of side surfaces of the resin member comprise a first side surface adjacent to the light emitting device, a second side surface facing the first side surface, and third and fourth side surfaces arranged between the first and second side surfaces so as to face each other. The exit surface of the resin member comprises a light extraction structure having a large length in a first direction and having a concavo-convex pattern in a second direction that is perpendicular to the first direction. The light emitting device comprises an exit area corresponding to a part of the second side surface in the first direction. The thickness of the second side surface, in connection with the resin member, may be smaller than the thickness of the first side surface.

First claim

The invention claimed is:

1. A lighting module comprising:
a substrate;
a light emitting device disposed on the substrate; and
a resin member disposed on the substrate and the light emitting device,
wherein the resin member includes a plurality of side surfaces and an exit surface on an upper portion thereof,
the plurality of side surfaces of the resin member include a first side surface adjacent to the light emitting device, a second side surface facing the first side surface, and a third side surface and a fourth side surface disposed between the first and second side surfaces and facing each other,
the exit surface of the resin member includes a light extraction structure having a concavo-convex pattern disposed in a first direction,
the light emitting device includes an emitting region facing to a portion of the second side surface in the first direction, and
a thickness of the second side surface is smaller than that of the first side surface in the resin member,
wherein the concavo-convex pattern has a long length in a second direction orthogonal to the first direction,
wherein the light emitting device, the resin member, and the substrate overlap in a vertical direction, and
wherein an upper end height of the second side surface of the resin member is lower than an upper end height of the first side surface.

2. The lighting module of claim 1 , wherein a thickness of the resin member is a gradually smaller as it is farther from the light emitting device, and
wherein a distance the substrate and the exit surface of the resin member is gradually smaller as a distance from the light emitting device to the second side surface increases.

3. The lighting module of claim 2 , comprising at least one of a multi-layered reflective member and a single-layered reflective layer between the resin member and the substrate.

4. The lighting module of claim 1 , wherein the resin member is arranged in plural in the first direction on the substrate,
the light emitting device is disposed in each of the plurality of resin members, and
the light emitting devices disposed in each of the resin members is disposed in the first direction.

5. The lighting module of claim 1 , wherein the resin member includes a first region in which the light emitting device is disposed, and a second region between the first region and the second side surface,
the light extraction structure is disposed on the first and second regions, and
the light extraction structure of the second region has a gradually lower height as it is farther from the light emitting device.

6. The lighting module of claim 1 , wherein the resin member includes first and second resin members adjacent to each other,
the light emitting device includes a first light emitting device disposed adjacent to a first side surface of the first resin member and a second light emitting device disposed adjacent to a first side surface of the second resin member, and
the first and second resin members include a protrusion portion covering the first and second light emitting devices.

7. The lighting module of claim 6 , wherein the first resin member has a concave recess in a direction of the first light emitting device from the second side surface,
a protrusion portion of the second resin member is disposed in the recess of the first resin member, and
wherein the protrusion portion of the second resin member is protruded in a direction of the first light emitting device,
an upper surface of the protrusion portion has a rough surface.

8. The lighting module of claim 1 , wherein the exit surface of the resin member includes a first region adjacent to the first side surface, a second region overlapped with the light emitting device in the vertical direction, and a third region between the second region and the third side surface,
the second region includes at least one of a concave portion and a convex portion,
the concave portion has a concave curved surface and a long length in the second direction of the resin member, and
the second region is disposed lower than an upper surface of the first region.

9. The lighting module of claim 1 , wherein the exit surface of the resin member includes a plurality of concave portions having a concave curved surface and a convex portion disposed between the concave portions,
the concave portions have a long length in the second direction, and is alternately arranged in the first direction from the first side surface toward the second side surface of the resin member,
the exit surface of the resin member includes a first region including a concave portion adjacent to the first side surface and at least a portion of which is overlapped with the light emitting device in the vertical direction, a second region including a region in which a virtual straight line connecting at least two uppermost ends of the convex portions is inclined, a third region including at least one concave portion disposed between the second region and the second side surface, and a fourth region including at least one concave portion disposed between the third region and the second side surface.

10. The lighting module of claim 9 , wherein a distance between the substrate and an uppermost end of the convex portion adjacent to the second region in the third region is smaller than a distance between the substrate and the uppermost end of the convex portion adjacent to the fourth region, and
a height of the convex portion disposed in the first region is higher than a height of the convex portion disposed in the third region, and the convex portion disposed in the fourth region has a gradually lower height as it is adjacent to the second side surface of the resin member.

11. The lighting module of claim 1 , wherein the exit surface of the resin member includes a first region at least a portion of which is overlapped with the light emitting device in the vertical direction, a second region including a concave portion having a predetermined depth in a direction of the substrate between the first region and the second side surface, and a third region disposed between the second region and the second side surface,
wherein the first region includes the light extraction structure,
the second region has a height lower than a height of an uppermost end of the first region,
the concave portion of the second region includes a first reflective surface having a surface inclined in a direction toward the substrate, and a second reflective surface having a surface inclined in a direction away from the substrate,
wherein the first and second reflective surfaces have a long length in the second direction,
the light extraction structure disposed in the third region has a long length in the second direction and is arranged in the first direction, and
a lowermost end of the concave portion is higher than an upper surface of the light emitting device and is not overlapped with the light emitting device and the substrate in the vertical direction.

12. A lighting module comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate; and
a resin member disposed on the substrate and the plurality of light emitting devices,
wherein the resin member includes a plurality of side surfaces and an exit surface on an upper portion,
wherein the exit surface of the resin member includes a light extraction structure,
wherein the plurality of light emitting devices includes a first light emitting device and a second light emitting device spaced from the first light emitting device in a first direction,
wherein the resin member includes a first resin member surrounding a periphery of the first light emitting dev

Assignees

• Lg Innotek Co Ltd

Inventors

• Hwang Seong Jin
• Kang Se Eun
• Kim Jin Hee
• Jin Gyeong Il

Classifications

• F21S43/28135

  Structures encapsulating the light source · CPC title

• G02F1/133606

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02B5/02

  Diffusing elements; Afocal elements · CPC title

• F21W2107/10

  for land vehicles · CPC title

• F21V7/22

  characterised by materials, surface treatments or coatings, e.g. dichroic reflectors · CPC title