Lighting device

Patent metadata

Field	Value
Publication number	US-11359786-B2
Application number	US-202017422231-A
Country	US
Kind code	B2
Filing date	Jan 23, 2020
Priority date	Jan 24, 2019
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

A lighting device disclosed in an embodiment of the invention includes a plurality of light sources disposed on a substrate; a resin layer disposed on the substrate and the plurality of light sources; a phosphor layer disposed on the resin layer, and an ink layer disposed on the phosphor layer, wherein the ink layer has a first ink layer and a second ink layer having a height greater than that of the first ink layer with respect to the upper surfaces of the phosphor layer, and it possible to provide a three-dimensional image of the 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 the plurality of light sources;
a phosphor layer disposed on the resin layer; and
an ink layer disposed on the phosphor layer;
wherein the ink layer has a first ink layer disposed on the phosphor layer and a second ink layer having a height greater than a height of the first ink layer with respect to upper surface of the phosphor layer,
wherein the second ink layer is disposed on the first ink layer.

2. The lighting device of claim 1 , wherein the height of the first ink layer on a lower surface of the ink is ⅕ or more of the height from the lower surface of the ink layer to an upper surface of the second ink layer.

3. The lighting device of claim 2 , wherein the upper surface of the first ink layer is on contact with the upper surface of the second ink layer, and
wherein the upper surface of the first ink layer is parallel to the upper surface of the second ink layer.

4. The lighting device of claim 3 , wherein the first ink layer includes a plurality of ink layers having different heights.

5. The lighting device of claim 4 , wherein the first ink layer includes a first-first ink layer on the phosphor layer and a first-second ink layer having a height smaller than a height of the first-first ink layer with respect to the upper surface of the phosphor layer.

6. The lighting device of claim 5 , wherein widths of the first-first ink layer, the first-second ink layer, and the second ink layer are different from each other.

7. The lighting device of claim 2 , wherein an upper surface of the ink layer is inclined with respect to the upper surface of the second ink layer.

8. The lighting device of claim 2 , wherein an upper surface of the ink layer includes a curved surface.

9. The lighting device of claim 1 , wherein the height of the second ink layer is a same as a thickness of the phosphor layer.

10. The lighting device of claim 1 , wherein the first ink layer implements a light in a first pattern by light emitted from the plurality of light sources, and the second ink layer implements a light in a second pattern different from a shape of the first pattern,
when a luminance of the light is 10 candela or less, a brightness of a region of the first pattern is brighter than a brightness of a region of the second pattern, and
when a luminance of the light is 60 candela or more, the brightness of the region of the first pattern corresponds to the brightness of the region of the second pattern.

11. A lighting device comprising:
a substrate;
a plurality of light sources disposed on the substrate;
a resin layer disposed on the substrate and the plurality of light sources;
a phosphor layer disposed on the resin layer; and
an ink layer disposed on the phosphor layer,
wherein an upper portion of the ink layer includes a plurality of convex portions and a plurality of concave portions respectively disposed between adjacent convex portions,
wherein an upper surface of each of the convex portions is disposed at a position higher than a bottom of the concave portion.

12. The lighting device of claim 11 , wherein the plurality of convex portions is disposed along a periphery of each of the plurality of concave portions.

13. The lighting device of claim 11 , wherein the plurality of convex portions is connected to each other, and
wherein each of the plurality of concave portions has an inclined surface or a concave curved surface.

14. The lighting device of claim 11 , wherein each of the plurality of convex portions has a same with of upper surface from each other and has the width smaller than a bottom width of each of the plurality of concave portions.

15. A lighting device comprising:
a substrate;
a plurality of light sources disposed on the substrate;
a resin layer disposed on the substrate and the plurality of light sources;
a phosphor layer disposed on the resin layer; and
an ink layer disposed on an upper surface and a plurality of side surfaces of the phosphor layer,
wherein the ink layer includes a first ink layer disposed on the upper surface and the side surfaces of the phosphor layer and a second ink layer having a plurality of convex portions on the upper surface of the first ink layer,
wherein the ink layer includes a plurality of concave portions concave between the plurality of convex portions, and
wherein a height from a lower surface of the ink layer to an upper surface of the second ink layer is disposed to be higher than a height of the upper surface of the first ink layer.

16. The lighting device of claim 15 , wherein the height from the lower surface of the ink layer to the upper surface of the first ink layer is ⅕ or more of the height from the lower surface of the ink layer to the upper surface of the second ink layer, and
wherein side surfaces of the ink layer extend to each of the side surfaces of the phosphor layer and have a flat plane.

17. The lighting device of claim 15 , wherein the lower surface of the first ink layer is in contact with the upper surface of the phosphor layer, and
wherein the upper surface of the first ink layer is parallel to the upper surface of the second ink layer and is a bottom of each of the concave portions.

18. The lighting device of claim 15 , wherein each of the plurality of concave portions has a stepped structure with different depths.

19. The lighting device of claim 15 , wherein the plurality of concave portions is separated from each other, and
wherein the plurality of convex portions is connected to each other.

Assignees

• Lg Innotek Co Ltd

Inventors

• Park Hoon
• Han Sa Rum
• Lee Jung Ju

Classifications

• H10W90/00

  Package configurations · CPC title

• H10H20/8506

  Containers · CPC title

• H10H20/854

  characterised by their material, e.g. epoxy or silicone resins · CPC title

• H10H20/851

  Wavelength conversion means · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title