Lighting apparatus and automotive lamp comprising same

Patent metadata

Field	Value
Publication number	US-12140286-B2
Application number	US-202218279466-A
Country	US
Kind code	B2
Filing date	Mar 11, 2022
Priority date	Mar 11, 2021
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

The lighting device disclosed in the embodiment of the invention includes a substrate; a plurality of light emitting devices disposed on the substrate and emitting light in at least a first direction; a resin layer sealing the plurality of light emitting devices; and an optical member disposed on the resin layer, wherein the resin layer may include a first light blocking portion integrally formed with the resin layer and having a transmittance lower than that of the resin layer on an emission-side region of each of the plurality of light emitting devices.

First claim

The invention claimed is:

1. A lighting device comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate and emitting light in at least a first direction;
a resin layer sealing the plurality of light emitting devices;
an optical member disposed on the resin layer; and
wherein the resin layer includes a first light blocking portion integrally formed with the resin layer and having a transmittance lower than that of the resin layer on an emission side region of each of the plurality of light emitting devices, and
wherein the resin layer includes a fourth light blocking portion disposed around the light emitting devices.

2. The lighting device of claim 1 , wherein the first light blocking portion has an area larger than an area of each of the light emitting devices on a region facing to an emission surface of each of the light emitting devices.

3. The lighting device of claim 1 , wherein the resin layer includes a second light blocking portion disposed on a region that does not overlap with each of the light emitting devices and the first light blocking portion in a vertical direction, and
wherein an upper surface of the second light blocking portion is exposed to an upper surface of the resin layer.

4. The lighting device of claim 1 ,
wherein the optical member includes a third light blocking portion disposed on a region that does not overlap with each of the light emitting devices and the first light blocking portion in a vertical direction.

5. A lighting device comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate and emitting light in at least a first direction;
a resin layer sealing the plurality of light emitting devices;
an optical member disposed on the resin layer; and
a reflective member disposed between the substrate and the resin layer,
wherein the resin layer includes a first light blocking portion integrally formed with the resin layer and having a transmittance lower than that of the resin layer on an emission side region of each of the plurality of light emitting devices,
wherein the resin layer includes a second light blocking portion disposed in a region that does not overlap with the light emitting devices and the first light blocking portions in a vertical direction,
wherein the optical member includes a third light blocking portion disposed in a region that does not overlap with the light emitting devices and the first light blocking portions in the vertical direction,
wherein an upper surface of the second light blocking portion is exposed to an upper surface of the resin layer, and
wherein the resin layer includes a fourth light blocking portion disposed around the light emitting devices.

6. The lighting device of claim 1 , wherein the optical member is a reflective layer,
wherein the resin layer is disposed between the reflective layer and the reflective member,
wherein the first light blocking portion is disposed between an emission surface of each of the light emitting devices and a side surface of the resin layer,
wherein each of the substrate, the resin layer, and the reflective layer has a plurality of convex portions in which the emission-side region of each of the light emitting devices is convex outward.

7. The lighting device of claim 1 , wherein the first light blocking portion is exposed on an upper surface of the resin layer, and at least a portion of the first light blocking portion overlaps each of the light emitting devices in a vertical direction,
wherein the first light blocking portion includes a first region extending from each of the light emitting devices in a direction toward an emission side of each of the light emitting devices, and a second region extending in a second direction on both sides of the first region.

8. The lighting device of claim 1 , wherein the first light blocking portion has a transmittance of 50% or less for light emitted from the light emitting device,
wherein a difference between transmittance and reflectance of the first light blocking portion is in a range of 1% to 30%.

9. The lighting device of claim 1 ,
wherein the first light blocking portion is made of a white resin material.

10. The lighting device of claim 1 ,
wherein the first light blocking portion is formed of a same resin material as the resin layer.

11. The lighting device of claim 1 ,
wherein the first light blocking portion has a thickness of a region disposed on a same straight line as a center of the light emitting device, which is thicker than a thickness of an outer region,
wherein the optical member includes at least one of a diffusion agent, a phosphor, and ink particles.

12. A lamp comprising at least one of a tail light, a turn signal light, a reversing light, a brake light, and a daytime running light,
wherein the lamp is a vehicle lamp having a lighting device according to claim 1 .

13. A lighting device comprising:
a substrate;
a plurality of light emitting devices disposed on the substrate and emitting light in at least a first direction;
a resin layer sealing the plurality of light emitting devices;
an optical member disposed on the resin layer; and
a reflective member disposed between the substrate and the resin layer,
wherein the resin layer includes first light blocking portions integrally formed with the resin layer and having a transmittance lower than that of the resin layer in an emission side region of each of the plurality of light emitting devices,
wherein the first light blocking portions are disposed inside the resin layer spaced apart from a surface of the resin layer, and
wherein the first light blocking portions are regions in the resin layer in which a material of the resin layer is discolored.

14. The lighting device of claim 13 , wherein the first light blocking portions are formed within the resin layer without an interface with the material of the resin layer.

15. The lighting device of claim 14 , wherein the first light blocking portions are the regions where the resin layer is discolored to white.

16. The lighting device of claim 13 , wherein the first light blocking portions have a refractive index higher than that of the resin layer and are regions in which the material of the resin layer is discolored.

17. The lighting device of claim 13 , wherein each of the first light blocking portions is a discolored region made of the same material as that of the resin layer.

18. The lighting device of claim 17 ,
wherein each of the first light blocking portions has an area larger than an area of each of the light emitting devices in a region facing an emission surface of each of the light emitting devices.

19. The lighting device of claim 17 , wherein the resin layer includes second light blocking portions disposed in a region that does not overlap the light emitting devices and the first light blocking portions in a vertical direction,
wherein an upper surface of each of the second light blocking portions is exposed to an upper surface of the resin layer, and
wherein the second light blocking portions are regions in which the same material as the material of the resin layer is discolored.

20. The lighting device of claim 17 , wherein the resin layer includes a fourth light blocking portion disposed around the light emitting devices, and
wherein the fourth light blocking portion is a region in which the same material as the material of the resin layer is discolored.

Assignees

• Lg Innotek Co Ltd

Inventors

• Ahn Kyoung Soo
• Yang Hyun Duck
• Moon Young Min
• Jang Kee Youn

Classifications

• H10W90/00

  Package configurations · CPC title

• F21W2107/10

  for land vehicles · CPC title

• H10H20/856

  Reflecting means · CPC title

• H10H20/852

  Encapsulations · CPC title

• H10H20/8515

  not being in contact with the bodies · CPC title