Lighting device

Patent metadata

Field	Value
Publication number	US-10845528-B2
Application number	US-201716346996-A
Country	US
Kind code	B2
Filing date	Nov 3, 2017
Priority date	Nov 4, 2016
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

Disclosed in an embodiment is a lighting device comprising: a light conversion module including one surface and the other surface; and a light source module disposed at a side surface of the light conversion module, wherein the light source module comprises a plurality of light emitting elements disposed so as to be spaced in a first direction, the first direction is a thickness direction of the light conversion module, and at least one among the plurality of light emitting elements is disposed higher than the one surface of the light conversion module in the first direction.

First claim

The invention claimed is:

1. A lighting device comprising:
a light conversion module having a first surface, a second surface, and a side surface between the first surface and the second surface; and
a light source module disposed on the side surface of the light conversion module,
wherein the light source module includes a plurality of light emitting elements disposed to be spaced apart from each other in a first direction,
the first direction is a thickness direction of the light conversion module from the first surface to the second surface, and
at least a first one of the plurality of light emitting elements is disposed higher than the second surface of the light conversion module in the first direction, and at least a second one of the plurality of light emitting elements is disposed lower than the second surface of the light conversion module in a second direction opposite to the first direction.

2. The lighting device of claim 1 , wherein the light conversion module includes a base substrate, a light guide layer disposed on the base substrate, and a reflection pattern layer disposed between the base substrate and the light guide layer.

3. The lighting device of claim 2 , wherein:
the reflection pattern layer includes a plurality of optical patterns; and
the plurality of optical patterns extend in a direction perpendicular to a proceeding direction of light emitted from the plurality of light emitting elements.

4. The lighting device of claim 1 , wherein the second one of the plurality of light emitting elements is disposed to face the side surface of the light conversion module.

5. The lighting device of claim 1 , wherein light emitted from the first one of the light emitting elements located higher than the second surface of the light conversion module in the first direction is incident on the second surface of the light conversion module, and light emitted from the second one of the light emitting elements is incident on the side surface of the light conversion module.

6. The lighting device of claim 2 , wherein the reflection pattern layer includes a reflection layer disposed between the base substrate and the light guide layer, and an optical layer disposed between the reflection layer and the light guide layer and including a plurality of optical patterns protruding toward the reflection layer.

7. The lighting device of claim 6 , comprising a separation part disposed between the reflection layer and the optical layer.

8. The lighting device of claim 2 , wherein the reflection pattern layer includes an optical layer disposed between the base substrate and the light guide layer and including a plurality of optical patterns, and a reflection layer disposed on the plurality of optical patterns.

9. The lighting device of claim 1 , wherein:
the light source module includes a first light source module including a first circuit board and a plurality of light emitting elements disposed on the first circuit board and a second light source module including a second circuit board and a plurality of light emitting elements disposed on the second circuit board; and
an extending direction of each of the first circuit board and the second circuit board has a predetermined angle.

10. The lighting device of claim 1 , further comprising a second plate in which the light source module is disposed and a first plate in which the light conversion module is disposed, and
wherein an inner angle between the first plate and the second plate is within a range of 10 degree to 80 degree.

11. The lighting device of claim 1 , further comprising a reflector configured to collect light emitted from the light emitting elements,
wherein the reflector includes a slit formed in a direction parallel to the first direction.

12. The lighting device of claim 1 , wherein a distance between two of the plurality of light emitting elements is in a range of 5 mm to 50 mm.

13. The lighting device of claim 1 , wherein more than half of the plurality of light emitting elements are disposed higher than the second surface of the light conversion module.

14. The lighting device of claim 2 , wherein the light guide layer has a haze of 2% or less, and wherein a light transmission rate of the light guide layer is greater than or equal to 80%.

15. The lighting device of claim 2 , wherein a thickness of the light guide layer is in a range of 100 μm to 250 μm.

16. The lighting device of claim 1 , wherein the light source module includes a circuit board that extends in the first direction from a first end to a second end, the circuit board includes a first point on a virtual plane corresponding to the second surface of the light conversion module, and the first one of the plurality of light emitting elements is disposed on the circuit board between the first point and the second end of the circuit board.

17. A lighting device comprising:
a light conversion module having a first surface, a second surface, and a side surface between the first surface and the second surface; and
a light source module disposed on the side surface of the light conversion module,
wherein the light source module includes a plurality of light emitting elements disposed to be spaced apart from each other in a first direction,
the first direction is a thickness direction of the light conversion module from the first surface to the second surface, and
a first one of the plurality of light emitting elements is disposed higher in the first direction than a virtual plane corresponding to the second surface of the light conversion module, and a second one of the plurality of light emitting elements is disposed lower than the virtual plane corresponding to the second surface of the light conversion module, wherein light emitted from the first one of the light emitting elements located higher in the first direction than the virtual plane is incident on the second surface of the light conversion module, and light emitted from the second one of the light emitting elements is incident on the side surface of the light conversion module.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lim Eay Jin
• Lee Dong Hyun

Classifications

• H10H20/855

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

• G02B30/00

  Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images (in microscopes G02B21/22) · 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

• G02B6/0055 Primary

  Reflecting element, sheet or layer · CPC title

• F21K9/68

  Details of reflectors forming part of the light source · CPC title