LIGHTING DEVICE

• US 20150138829A1
• Filed: 05/07/2013
• Published: 05/21/2015
• Est. Priority Date: 05/10/2012
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Jang, Chul Ho
• Granted Patent: US 10,001,596 B2
• Time in Patent Office: Days
• US Class Current: 362/606
• CPC Class Codes: F21S 8/061 with a non-rigid pendant, i.e. a cable, wire or chain
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 19/0045 by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2113/00 Combination of light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0016 Grooves, prisms, gratings, scattering particles or rough surfaces
• 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 6/0038 Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
• CPC Class Codes: G02B 6/0043 provided on the surface of the light guide
• CPC Class Codes: G02B 6/0046 Tapered light guide, e.g. wedge-shaped light guide
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0061 to provide homogeneous light output intensity
• CPC Class Codes: G02B 6/0078 Side-by-side arrangements, e.g. for large area displays

Abstract

A lighting device may be provided that includes: a body; a first light source and a second light source, which are disposed on the body and are disposed symmetrically with each other with respect to a central axis of the body; a first light guide unit which is disposed on the first light source and is coupled to the body; and a second light guide unit which is disposed on the second light source and is coupled to the body. The first light guide unit and the second light guide unit are disposed symmetrically with each other with respect to the central axis of the body.

Claims

1. A lighting device comprising:

a body;

a first light source and a second light source, which are disposed on the body and are disposed symmetrically with each other with respect to a central axis of the body;

a first light guide unit which is disposed on the first light source and is coupled to the body; and

a second light guide unit which is disposed on the second light source and is coupled to the body,

wherein the first light guide unit and the second light guide unit are disposed symmetrically with each other with respect to the central axis of the body, and

wherein the thickness of each of the first and the second light guide units is reduced from one side to the other side thereof.

2. The lighting device of claim 1,

wherein the body comprises a first receiver receiving the first light source, and a second receiver receiving the second light source,

and wherein the first receiver receives one side of the first light guide unit, and the second receiver receives one side of the second light guide unit.

3. The lighting device of claim 2, further comprising:

a first fixing plate which is disposed in the first receiver and disposed between the first light source and the body; and

a second fixing plate which is disposed in the second receiver and disposed between the second light source and the body.

4. The lighting device of claim 3, wherein the body comprises a coupling portion which is coupled to one sides of the first and the second fixing plates.

6. The lighting device of claim 1,

wherein the body comprises a first surface on which the first light source is disposed, and a second surface on which the second light source is disposed,

and wherein the first and the second surfaces form an acute angle with the central axis of the body.

8. The lighting device of claim 1, wherein each of the first and the second light guide units has a shape curved upward or downward.

10. The lighting device of claim 1,

wherein the first light guide unit comprises a portion disposed between one side and the other side thereof,

and wherein the thickness of the portion is reduced from one side to the other side of the first light guide unit.

11. The lighting device of claim 1, further comprising an optical part which is disposed on at least one of the top surface and the bottom surface of the first light guide unit and controls a distribution pattern of light which is emitted through the top surface and the bottom surface of the first light guide unit or controls a distribution ratio between the light which is emitted through the top surface and the light which is emitted through the bottom surface of the first light guide unit.

12. The lighting device of claim 11, wherein the optical part has a print pattern or a prism structure.

5. (canceled)

7. (canceled)

13. The lighting device of claim 7, further comprising a reflector disposed on at least one of the top surface, the bottom surface and the plurality of sides of the first light guide unit.

14. The lighting device of claim 13, wherein the reflector is disposed on one side of the first light guide unit.

9. (canceled)

15-16. -16. (canceled)

17. A lighting device comprising:

a body;

a first light source and a second light source, which are disposed on the body, are disposed symmetrically with each other with respect to a central axis of the body and comprise at least one light emitting device;

a first light guide unit which has one side optically coupled to the first light source; and

a second light guide unit which has one side optically coupled to the second source,

wherein the body comprises a first surface on which the first light source is disposed, and a second surface on which the second light source is disposed,

and wherein the first and the second surfaces form an acute angle with the central axis of the body.

18. The lighting device of claim 17, wherein the one side of the first light guide unit comprises at least one curved portion on which light from the light emitting device is incident.

19. The lighting device of claim 18, wherein the curved portion totally reflects all of the light emitted from the light emitting device.

20. The lighting device of claim 19, wherein the curved portion comprises a prism structure for allowing a part of the light from the light emitting device to pass therethrough.

21. The lighting device of claim 18, wherein the curved portion allows a part of the light from the light emitting device to pass therethrough.

22. The lighting device of claim 20, further comprising a cover which is disposed under the one sides of the first and the second light guide units and allows the light from the curved portion to pass therethrough.

23. The lighting device of claim 22, wherein the cover is made of an opaque material and comprises an optical transmitting plate for allowing the light from the curved portion to pass therethrough.

24. A lighting device comprising:

a body which has a side;

a light source which comprises a substrate disposed on the side of the body and a light emitting device disposed on a side of the substrate; and

a light guide unit which is disposed on the light source and comprises a side having a surface on which light from the light emitting device is incident,

wherein the side of the light guide unit further comprises a curved portion on which the light has passed through the surface is incident,

and wherein a critical angle of the curved portion is greater than an incident angle of the light incident on the curved portion.

25. The lighting device of claim 24, comprising a cover disposed under the side of the light guide unit, wherein the curved portion has a range from the side of the light guide unit to a first point, and wherein the first point is an intersection between the light guide unit and a segment connecting the light emitting device with one end of the cover.