Lighting device

Patent metadata

Field	Value
Publication number	US-9970604-B2
Application number	US-201314383394-A
Country	US
Kind code	B2
Filing date	Mar 5, 2013
Priority date	Mar 8, 2012
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

Provided is a lighting device, including: one or more light emitting units formed on a printed circuit board; a resin layer which is formed on the light emitting units so that the light emitting units are embedded in the resin layer; and a diffusion member formed on an upper side of the resin layer, wherein a protruding optical pattern is formed on at least one of an upper side of the printed circuit board and a lower surface of the diffusion member, whereby various geometric optical patterns can be implemented, an entire thickness can be reduced and when a product is designed, a degree of freedom in design can be improved according to the securing of flexibility.

First claim

The invention claimed is:

1. A lighting device, comprising:
at least one light emitting unit provided over a printed circuit board;
a resin layer disposed over the light emitting unit and surrounding the light emitting unit;
a diffusion member disposed on the resin layer; and
an optical pattern layer disposed between the resin and the diffusion member,
wherein the optical pattern layer includes a first optical sheet disposed on an upper surface of the resin layer and a second optical sheet disposed on the first optical sheet,
wherein the diffusion member includes a surface facing the second optical sheet, wherein the surface of the diffusion member includes first patterned protrusions, and
wherein the second optical sheet includes a surface facing the diffusion member, wherein the surface of the second optical sheet includes second patterned protrusions,
wherein the first patterned protrusions are arranged in a first direction on the surface of the diffusion member, and the first patterned protrusions are vertically overlapped with the light emitting unit,
wherein the second patterned protrusions are arranged in the first direction on the surface of the second optical sheet, and the second patterned protrusions are vertically overlapped with the light emitting unit, and
wherein a spacing part is disposed between the first patterned protrusions and the second patterned protrusions.

2. The lighting device of claim 1 , further comprising a reflection member provided between the printed circuit board and the resin layer, wherein the reflection member includes third patterned protrusions, and a reflection pattern is disposed between the reflection member and the resin layer.

3. The lighting device of claim 1 , wherein the light emitting unit comprises side view type light emitting diodes.

4. The lighting device of claim 1 , further comprising an adhesive layer disposed between the first optical sheet and the second optical sheet.

5. The lighting device of claim 1 , wherein an optical pattern for shielding and reflecting emitted light is disposed on an upper surface of the first optical sheet or a lower surface of the second optical sheet.

6. The lighting device of claim 5 , wherein the optical pattern is disposed in a structure in which a diffusion pattern including one or more materials selected from TiO 2 , CaCO 3 , BaSO 4 , Al 2 O 3 and silicon overlaps with a light shielding pattern including Al or a mixture of Al and TiO 2 .

7. The lighting device of claim 6 , wherein the diffusion pattern is disposed in a structure in which the diffusion pattern is printed on the light shielding pattern.

8. The lighting device of claim 1 , wherein the resin layer is composed of an ultraviolet curing resin including an oligomer, wherein the oligomer comprises any one material selected from urethane acrylate, epoxy acrylate, polyester acrylate and acrylic acrylate.

9. The lighting device of claim 1 , wherein the printed circuit board comprises a flexible printed circuit board.

10. The lighting device of claim 1 , wherein the first patterned protrusions are disposed in the first direction on the entire surface of the diffusion member, and the second patterned protrusions are disposed in the first direction on the entire surface of the second optical sheet.

11. The lighting device of claim 1 , wherein the first patterned protrusions extend in the first direction from a first edge of the surface of the diffusion member to a second edge of the surface of the diffusion member.

12. A lighting device comprising:
at least one light emitting device;
a resin layer on the light emitting device;
a diffusion member on the resin layer;
a first optical sheet on an upper surface of the resin layer; and
a second optical sheet on the first optical sheet,
wherein the diffusion member includes first patterned protrusions to face the second optical sheet, and
wherein the second optical sheet includes second patterned protrusions to face the diffusion member,
wherein the first patterned protrusions are arranged in a first direction on the surface of the diffusion member, and the first patterned protrusions are vertically overlapped with the light emitting device,
wherein the second patterned protrusions are arranged in the first direction on the surface of the second optical sheet, and the second patterned protrusions are vertically overlapped with the light emitting device, and
wherein a spacing part is disposed between the first patterned protrusions and the second patterned protrusions.

13. The lighting device of claim 12 , comprising:
a circuit board, wherein the at least one light emitting device is on the circuit board;
a reflection member between the circuit board and the resin layer, wherein the reflection member includes third patterned protrusions, and
a reflection pattern between the reflection member and the resin layer.

14. The lighting device of claim 12 , wherein the light emitting device includes side view type light emitting diodes.

15. The lighting device of claim 12 , comprising an adhesive layer between the first optical sheet and the second optical sheet.

16. The lighting device of claim 12 , wherein the first patterned protrusions are disposed in the first direction on the entire surface of the diffusion member, and the second patterned protrusions are disposed in the first direction on the entire surface of the second optical sheet.

17. The lighting device of claim 12 , wherein the first patterned protrusions extend in the first direction from a first edge of the surface of the diffusion member to a second edge of the surface of the diffusion member.

Assignees

• Lg Innotek Co Ltd

Inventors

• Yang Hyun Duck
• Park Moo Ryong
• Park Kwang Ho

Classifications

• G02B6/0021 Primary

  for housing at least a part of the light source, e.g. by forming holes or recesses · CPC title

• G02B6/0041

  provided in the bulk of the light guide · CPC title

• F21K9/60 Primary

  Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction · CPC title

• G02B6/0016

  Grooves, prisms, gratings, scattering particles or rough surfaces · CPC title

• F21K9/50 Primary

  Mechanical Engineering · mapped topic