Lighting device

Patent metadata

Field	Value
Publication number	US-12188650-B2
Application number	US-202418408067-A
Country	US
Kind code	B2
Filing date	Jan 9, 2024
Priority date	Aug 16, 2018
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

A lighting device includes a substrate, light sources having a first light source on the substrate, a resin layer sealing the plurality of light sources on the substrate; and a light transmitting layer on the resin layer. A surface of the resin layer has an upper surface and side surfaces, and the side surfaces of the resin layer has a convex curved surface. The light transmitting layer has a first flat region on the upper surface of the resin layer and a second curved region on the side surfaces of the resin layer. The convex curved surface of the resin layer and the second curved region of the light transmitting layer overlap the first light source in a vertical direction, and a corner between two adjacent the side surfaces of the resin layer has a convex curved surface.

First claim

The invention claimed is:

1. A lighting device comprising:
a substrate;
a plurality of light sources disposed on the substrate;
a resin layer disposed on the substrate and sealing the plurality of light sources; and
a light transmitting layer disposed on the resin layer,
wherein a surface of the resin layer has an upper surface and a plurality of side surfaces,
wherein at least one of the plurality of side surfaces of the resin layer has a convex curved surface,
wherein the light transmitting layer has a first region disposed on the upper surface of the resin layer and a second region disposed on the plurality of side surfaces of the resin layer,
wherein the second region extends from an end of the first region toward the substrate and including a convex curved surface,
wherein three or more of the plurality of light sources are arranged in the resin layer in a column direction,
wherein three or more of the plurality of light sources are arranged in the resin layer in a row direction,
wherein the plurality of light sources includes a first light source arranged to an outermost side of the light sources,
wherein the first region of the light transmitting layer is parallel to the upper surface of the resin layer,
wherein the convex curved surface of the resin layer and the second region of the light transmitting layer overlap the first light source in a vertical direction perpendicular to an upper surface of the substrate,
wherein a number of light sources vertically overlapping the first region of the light transmitting layer among the plurality of light sources is greater than a number of the first light source,
wherein a corner between two adjacent side surfaces of the plurality of side surfaces of the resin layer has a convex curved surface,
wherein a radius of curvature of the second region of the light transmitting layer is greater than a sum of a maximum thicknesses of the resin layer and a thickness of the light transmitting layer in the vertical direction, and
wherein an inner side of the first light source is disposed further outside than a straight line perpendicular to a boundary point between the first region and the second region of the light transmitting layer.

2. The lighting device of claim 1 , wherein each of the plurality of side surfaces of the resin layer has a convex curved surface,
wherein the light transmitting layer is in physical contact with the surface of the resin layer.

3. The lighting device of claim 1 , wherein a distance between a center of the first light source and an outer surface of the light transmitting layer in the vertical direction is greater than a minimum distance between the center of the first light source and an outer surface of the light transmitting layer in a horizontal direction.

4. The lighting device of claim 3 , wherein the minimum distance between the center of the first light source and the outer surface of the light transmitting layer in the horizontal direction is smaller than a distance between two adjacent light sources.

5. The lighting device of claim 4 , wherein the minimum distance between the center of the first light source and the outer surface of the light transmitting layer in the horizontal direction is in a range of 44% to 55% of the distance between two adjacent light sources.

6. The lighting device of claim 5 , wherein the distance between adjacent light sources is in a range of 5.5 mm to 6.5 mm.

7. The lighting device of claim 1 , wherein the radius of curvature of the second region of the light transmitting layer is in a range of 5.5 mm to 6.0 mm.

8. The lighting device of claim 1 , wherein the light transmitting layer includes a red ink.

9. The lighting device of claim 1 , wherein the light transmitting layer includes a red phosphor and a red ink.

10. A lighting device comprising:
a flexible substrate;
a plurality of light sources disposed on the substrate and electrically connected to the substrate;
a resin layer disposed on the substrate and sealing the plurality of light sources; and
a light transmitting layer disposed on the resin layer and including a phosphor,
wherein a surface of the resin layer has an upper surface and a plurality of side surfaces,
wherein the plurality of side surfaces of the resin layer has a convex curved surface,
wherein the light transmitting layer has a first region disposed on the upper surface of the resin layer and a second region disposed on the plurality of side surfaces of the resin layer,
wherein the second region extends from an end of the first region toward the substrate and including a convex curved surface,
wherein three or more of the plurality of light sources are arranged in the resin layer in a column direction,
wherein three or more of the plurality of light sources are arranged in the resin layer in a row direction,
wherein the plurality of light sources includes a first light source arranged to an outermost side of the light sources,
wherein the first region of the light transmitting layer is parallel to the upper surface of the resin layer,
wherein the convex curved surface of the resin layer and the second region of the light transmitting layer overlap the first light source in a vertical direction perpendicular to an upper surface of the substrate,
wherein a number of light sources vertically overlapping the first region of the light transmitting layer among the plurality of light sources is greater than a number of the first light source,
wherein a plurality of corners between two adjacent side surfaces of the plurality of side surfaces of the resin layer has a convex curved surface,
wherein a radius of curvature of the second region of the light transmitting layer is greater than a sum of a maximum thicknesses of the resin layer and a thickness of the light transmitting layer in the vertical direction, and
wherein an inner side of the first light source is disposed further outside than a straight line perpendicular to a boundary point between the first region and the second region of the light transmitting layer.

11. The lighting device of claim 10 ,
wherein the light transmitting layer includes a red ink.

12. The lighting device of claim 10 , wherein a distance between a center of the first light source and an outer surface of the light transmitting layer in the vertical direction is greater than a minimum distance between the center of the first light source and an outer surface of the light transmitting layer in a horizontal direction.

13. The lighting device of claim 12 , wherein the minimum distance between the center of the first light source and the outer surface of the light transmitting layer in the horizontal direction is smaller than a distance between two adjacent light sources.

14. The lighting device of claim 13 , wherein the minimum distance between the center of the first light source and the outer surface of the light transmitting layer in the horizontal direction is in a range of 44% to 55% of the distance between two adjacent light sources.

15. The lighting device of claim 14 , wherein the distance between adjacent light sources is in a range of 5.5 mm to 6.5 mm.

16. The lighting device of claim 10 , wherein the radius of curvature of the second region of the light transmitting layer is in a range of 5.5 mm to 6.0 mm.

17. The lighting device of claim 10 , wherein the sum of the thickness of the resin layer and the thickness of the first region of the light transmitting layer in the vertical direction is in a range of 5.5 mm to 6.0 mm.

18. The lighting device of claim

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Jung Ju
• Han Sa Rum

Classifications

• H10H29/853

  characterised by their shape · CPC title

• H10H29/8515

  not being in contact with the bodies · CPC title

• H10H20/8506

  Containers · CPC title

• H10H20/853

  characterised by their shape · CPC title

• H10H20/8514

  characterised by their shape, e.g. plate or foil · CPC title