LIGHTING DEVICE

• US 20130235577A1
• Filed: 03/05/2013
• Published: 09/12/2013
• Est. Priority Date: 03/07/2012
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: KIM, Chul Hong, PARK, Moo Ryong, PARK, Kwang Ho
• Granted Patent: US 8,858,025 B2
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21S 41/151 arranged in one or more lines
• CPC Class Codes: F21S 41/192 Details of lamp holders, terminals or connectors
• CPC Class Codes: F21S 41/24 Light guides
• CPC Class Codes: F21S 41/285 Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
• CPC Class Codes: F21S 41/37 characterised by their material, surface treatment or coatings
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21S 43/195 Details of lamp holders, terminals or connectors
• CPC Class Codes: F21S 43/20 characterised by refractors, transparent cover plates, light guides or filters
• CPC Class Codes: F21S 43/239 plate-shaped
• CPC Class Codes: F21S 43/245 emitting light from one or more of its major surfaces
• CPC Class Codes: F21S 43/249 with two or more light sources being coupled into the light guide
• CPC Class Codes: F21S 43/28135 Structures encapsulating the light source
• CPC Class Codes: F21S 43/31 Optical layout thereof
• CPC Class Codes: F21S 43/33 characterised by their material, surface treatment or coatings
• CPC Class Codes: F21S 43/50 characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
• CPC Class Codes: F21V 13/12 Combinations of only three kinds of elements
• CPC Class Codes: F21V 21/00 Supporting, suspending, or attaching arrangements for lighting devices F21V17/00, F21V19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q, stands for supporting apparatus or articles in general F16M11/00; Hand grips
• CPC Class Codes: F21V 7/22 characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• CPC Class Codes: G02B 6/0035 : provided on the surface of the light guide or in the bulk of it
• CPC Class Codes: G02B 6/0041 : provided in the bulk of the light guide
• CPC Class Codes: G02B 6/0051 : Diffusing sheet or layer
• CPC Class Codes: G02B 6/0055 : Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0065 : Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/0073 : Light emitting diode [LED]
• CPC Class Codes: G02B 6/0088 : of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/009 : of the light source in the package G02B6/0021 takes precedence
• CPC Class Codes: G02F 1/133606 : including a specially adapted diffusing, scattering or light controlling members
• CPC Class Codes: H01L 25/0753 : the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 : Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 : Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/44 : characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/60 : Reflective elements
• CPC Class Codes: H05K 1/185 : Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit semiconductor chips encapsulated by interconnect and support structures H01L23/5389, H01L24/00
• CPC Class Codes: H05K 2201/10106 : Light emitting diode [LED]
• CPC Class Codes: H05K 3/387 : for electroless plating H05K3/4661 takes precedence

Abstract

Provided is a lighting device, including: a printed circuit board; one or more light emitting units formed on the printed circuit board; a resin layer which is formed on the printed circuit board, in which the light emitting units are embedded; a diffusion plate formed on an upper side of the resin layer, whereby an entire thickness of the lighting device can be reduced, and when the product is designed, a degree of freedom in design can be improved because flexibility is secured.

Claims

1. A lighting device, comprising:

a printed circuit board;

one or more light emitting units formed on the printed circuit board;

a resin layer which is formed on the printed circuit board, in which the light emitting units are embedded; and

a diffusion plate formed on an upper side of the resin layer.

2. The lighting device of claim 1, further comprising a light reflection unit which is formed on at least any one of one side and another side of the resin layer.

3. The lighting device of claim 2, wherein the light reflection unit is formed in a structure in which the light reflection unit is directly adhered to the resin layer, or a structure in which the light reflection unit is adhered to the resin layer using an adhesive material.

4. The lighting device of claim 2, further comprising a light reflection unit supporting unit which is formed on an outer surface of the light reflection unit.

5. The lighting device of claim 1, further comprising an indirect radiation unit which is formed to be spaced apart from the resin layer and reflects light irradiated from the light emitting units.

6. The lighting device of claim 5, wherein the indirect radiation unit comprises the light reflection unit which is formed on at least any one of one side and another side of the resin layer, and an indirect radiation air gap is formed between a side of the resin layer and the light reflection unit.

7. The lighting device of claim 6, further comprising a support unit which is formed on the outer surface of the light reflection unit and in a lower part of the printed circuit board.

8. The lighting device of claim 2, wherein the light reflection unit is formed of a material including a white pigment or a metal.

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

10. The lighting device of claim 1, wherein the light emitting units are composed of side view type light emitting diodes.

11. The lighting device of claim 1, wherein a first air gap is formed between the resin layer and the diffusion plate.

12. The lighting device of claim 1, further comprising a reflection member which is formed between the printed circuit board and the resin layer and has a structure in which the light emitting units pass through the reflection member.

13. The lighting device of claim 12, wherein a reflection pattern is formed on the reflection member.

14. The lighting device of claim 13, wherein the reflection pattern is formed with a reflective ink including any one of TiO₂, CaCO₃, BaSO₄, Al₂O₃, Silicon and PS.

15. The lighting device of claim 1, further comprising a first optical sheet which is formed on an upper surface of the resin layer and diffuses emitted light.

16. The lighting device of claim 15, further comprising a second optical sheet formed on the first optical sheet.

17. The lighting device of claim 16, wherein an optical pattern for shielding or reflecting the light emitted to an upper surface of the first optical sheet or a lower surface of the second optical sheet is formed.

18. The lighting device of claim 17, wherein the optical pattern is formed in a structure in which a diffusion pattern formed using a light shielding ink including one or more materials selected from TiO₂, CaCO₃, BaSO₄, Al₂O₃ and silicon overlaps with a light shielding pattern formed using a light shielding ink including Al or a mixture of Al and TiO₂.

19. The lighting device of claim 18, wherein the diffusion pattern is formed in a structure in which it is printed on at least one surface of an upper surface and a lower surface of the light shielding pattern.

20. The lighting device of claim 1, wherein the resin layer is composed of an ultraviolet curing resin including a oligomer.

21. The light device of claim 20, wherein the oligomer comprises any one material selected from urethane acrylate, epoxy acrylate, polyester acrylate and acrylic acrylate.

22. The light device of claim 1, wherein the resin layer further comprises beads composed of any one selected from silicon, silica, glass bubble, PMMA, urethane, Zn, Zr, Al₂O₃ and acryl.

23. The lighting device of claim 6, wherein the light reflection unit is formed of a material including a white pigment or a metal.