Lighting module and lighting device having same

Patent metadata

Field	Value
Publication number	US-10648626-B2
Application number	US-201716096022-A
Country	US
Kind code	B2
Filing date	Apr 21, 2017
Priority date	Apr 29, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A lighting module disclosed in an embodiment comprises: a plurality of light emitting devices on a substrate; and a reflector arranged in the direction of emission of light from each light emitting device on the substrate. The light emitting device has a light exit surface, and the reflector has a reflecting surface concave toward the substrate, at least a portion of the reflecting surface corresponding to the light exit surface of the light emitting device. The reflecting surface is arranged at a height that increases gradually in proportion to the interval from the light emitting device arranged in the light incident direction. The reflecting surface comprises a plurality of convex portions arranged in a first direction and first bridge portions that connect between the plurality of convex portions. The first bridge portions are arranged along the convex portions and are arranged to be lower than a straight line that connect high points of adjacent convex portions. The convex portions and the first bridge portions have the same length in a second direction, which is perpendicular to the first direction, and the area of the convex portions may be larger than the area of the first bridge portions.

First claim

The invention claimed is:

1. A lighting module comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate; and
a reflector disposed in a light-emitting direction of each of the plurality of light emitting devices on the substrate,
wherein the light emitting device has an exit surface emitting light,
the reflector has a reflective surface concave toward the substrate, at least a portion of which corresponds to the exit surface of the light emitting device,
the reflective surface is disposed at a gradually higher height as it is farther from the light emitting device disposed in an incident direction,
the reflective surface includes a plurality of convex portions arranged in a first direction and first bridge portions connecting between the plurality of convex portions,
the first bridge portions are disposed along the convex portions,
the first bridge portions are disposed to be lower than a straight line connecting high points of adjacent convex portions,
the convex portions and the first bridge portions have the same length in a second direction orthogonal to the first direction,
an area of the convex portions is larger than that of the first bridge portions,
wherein the reflective surface of the reflector includes an open region in which a lower region adjacent to the light emitting device is opened in the incident direction,
wherein the open region has a recess corresponding to a center portion of the exit surface of the light emitting device, and
wherein the recess is recessed deeper in an emission direction of the light emitting device.

2. The lighting module of claim 1 , wherein the reflective surface includes concave portions disposed between the convex portions, which are arranged in the first direction, and the first bridge portions, and the convex portions include a convex curved surface or an inclined surface.

3. The lighting module of claim 2 , wherein the reflective surface includes a plurality of second bridge portions disposed in the first direction,
the concave portions include an inclined surface or a curved surface,
the concave portions and the first bridge portions have the same length in the second direction, and
the plurality of second bridge portions cross the first bridge portions.

4. The lighting module of claim 1 , wherein the reflective surface has a deeper depth as it is adjacent to a center portion,
the depth is an interval in a straight line connecting opposite edges in the first direction and opposite edges in the second direction,
the first bridge portions have a number smaller than that of the convex portions arranged in the first direction, and
an interval between the first bridge portions is the same or is gradually narrower as it is farther from the light emitting device.

5. The lighting module of claim 1 ,
wherein a length in the second direction is greater than that in the first direction in the open region, and
a length of the open region in the second direction is greater than that of the light emitting device in the second direction.

6. The lighting module of claim 5 ,
wherein a maximum length of the recess in the second direction is smaller than a length of the light emitting device in the second direction.

7. The lighting module of claim 1 , wherein an interval between the plurality of light emitting devices is disposed to be longer than a bottom length of the reflector disposed between the light emitting devices,
an inner portion of the reflector is spaced apart from the substrate, and
the reflector is formed of a resin material and has a support sidewall supported at the substrate.

8. The lighting module of claim 1 , wherein a portion of the reflector connects between the reflectors or is disposed to be overlapped with the light emitting device.

9. The lighting module of claim 1 , wherein a lower end of the reflective surface is disposed to be lower than an optical axis of the light emitting device, or is disposed to be lower than an upper surface of the substrate.

10. The lighting module of claim 1 , wherein the reflector has a coupling portion protruding toward the substrate.

11. A lighting module comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate in a first direction; and
a plurality of reflectors disposed on the substrate in the first direction,
wherein each of the plurality of reflectors has a reflective surface concave toward an upper surface of the substrate,
wherein each of the plurality of light emitting devices includes a front portion facing the reflective surface of the each of the plurality of reflectors and a rear portion opposite to the front portion,
wherein the each of the plurality of reflectors is spaced apart from the front portion and the rear portion of the each of the light emitting devices,
wherein a bottom of the each of the reflectors includes a length less than an interval between the light emitting devices in the first direction,
wherein each reflective surface of the reflectors includes a lower region adjacent to the front portion of the each of the light emitting devices and an upper region having a height higher than a height of the lower region,
wherein the upper region of the reflective surface has the height higher than a height of an upper surface of the light emitting device,
wherein the front portion of the light emitting device includes an exit surface facing the lower region of the reflective surface of the each of the reflectors, and
wherein the exit surface of the light emitting device is disposed in a direction perpendicular to the upper surface of the substrate.

12. The lighting module of claim 11 , wherein the reflective surface has a higher height as a distance from light emitting device increases, and
wherein the reflective surface includes a plurality of convex portions having a convex curved surface.

13. The lighting module of claim 12 , wherein the plurality of convex portions are disposed between a lower end and an upper end of the reflective surface of the reflector, and
wherein the each of the plurality of convex portions extends in a second direction orthogonal to the first direction.

14. The lighting module of claim 11 , wherein the plurality of reflectors do not overlap in a vertical direction with each of the light emitting devices.

15. The lighting module of claim 11 , wherein the light emitting device and the reflector are alternately arranged in the first direction.

16. The lighting module of claim 11 , wherein the each of the light emitting devices comprises:
a body having a cavity in the front portion and formed of resin;
a plurality of lead frames in the cavity; and
a light emitting chip disposed on at least one of the plurality of lead frames,
wherein an upper surface of the body has a lower height than that of the upper region of the reflector, and
wherein the each of the light emitting devices has a length in the first direction smaller than a width in a second direction.

17. The lighting module according to claim 11 , wherein the reflective surface includes a plurality of convex portion and a first bridge portion connecting between the plurality of convex portions,
wherein the first bridge portion extends in the second direction orthogonal to the first direction along the convex portions, and
wherein an area of an upper surface of the convex portion is greater than an area of upper surface of the first bridge portion.

18. The lighting module of claim 17 , wherein the reflective surface includes a first reflective

Assignees

• Lg Innotek Co Ltd

Inventors

• Hwang Seong Jin

Classifications

• F21S43/31

  Optical layout thereof · CPC title

• F21S43/14 Primary

  Light emitting diodes [LED] · CPC title

• F21S41/148

  the main emission direction of the LED being perpendicular to the optical axis · CPC title

• F21S43/26

  Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255 · CPC title

• F21V7/048

  with facets structure · CPC title