Edge lit lighting device

• US 9,459,397 B2
• Filed: 09/11/2013
• Issued: 10/04/2016
• Est. Priority Date: 03/12/2013
• Status: Active Grant

• Current Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Original Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Inventors: Boomgaarden, Mark Penley, Romeu, Ricardo, Holland, Eric, Kelley, Ryan
• Primary Examiner(s): Coughlin, Andrew
• Assistant Examiner(s): ZIMMERMAN, GLENN D
• Application Number:
  US14/024,280
• Publication Number:
  US 20140268870A1
• Time in Patent Office: 1,119 Days
• Field of Search: 362/623, 362/624, 362/625, 362/626
• US Class Current: 1/1
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• 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 6/0045 by shaping at least a portion of the light guide
• CPC Class Codes: G02B 6/0063 for extracting light out both the major surfaces of the light guide
• CPC Class Codes: G02B 6/0076 Stacked arrangements of multiple light guides of the same or different cross-sectional area

Abstract

An edge lit lighting device including a housing, a power circuit, a light source, and an optic. The power circuit may be carried by the housing, and adapted to form an electrical connection with an external power source. The light source may be carried by the housing and electrically connected to the power circuit. The optic may be carried by the housing and positioned in optical communication with the light source. The optic may further include a receiving surface positioned adjacent to the light source, and first and second emitting surfaces. The first emitting surface may include a plurality of features configured to redirect light defined as redirected light in a direction of the second emitting surface, the redirected light being emitted from the second emitting surface. The lighting device may further include pluralities of optics of light sources.

Claims

1. An edge lit lighting device comprising:

a rectangular prism shaped housing comprising an upper housing having a lower surface;

a plurality of light sources attached to the lower surface; and

a plurality of primary optics, each primary optic being associated with a light source of the plurality of light sources and positioned in optical communication with the associated light source, each primary optic comprising

a receiving surface positioned adjacent to the associated light source,

a first surface, and

a second emitting surface;

wherein the primary optics are carried by the planar surfaces of the rectangular prism shaped housing;

wherein the second emitting surface comprises a plurality of features configured to redirect light in the direction of the first surface;

wherein the plurality of light sources and plurality of primary optics are positioned so as to emit light in the direction of a secondary optic; and

wherein a primary optic of the plurality of primary optics is positioned so as to emit light in a direction approximately orthogonal to another primary optic of the plurality of primary optics.

2. The lighting device of claim 1 wherein at least two polygonal primary optics are oriented at angles of 90 degrees or greater with respect to each other.

3. The lighting device of claim 1 wherein the plurality of primary optics are attached to a lower housing.

4. The lighting device of claim 3 wherein each of the upper housing, the secondary optic, and the lower housing cooperate to define an optical chamber;

and wherein the optical chamber is sealed fluidically from the environment surrounding the lighting device.

5. The lighting device of claim 1 wherein the secondary optic comprises a plurality of sections;

wherein each primary optic of the plurality of primary optics is associated with a section of the plurality of sections of the secondary optic; and

wherein each primary optic of the plurality of primary optics is configured to emit light in the direction of its associated section of the secondary optic.

6. The lighting device of claim 1 wherein the light source comprises a plurality light-emitting diodes (LEDs).

7. The lighting device of claim 6 wherein the plurality of LEDs are arranged into a geometric configuration corresponding to an arrangement of the plurality of primary optics.

8. The lighting device of claim 1 wherein the light source is configured to provide light generally uniformly across a length of the receiving surface of each primary optic of the plurality of primary optics.

9. The lighting device of claim 1 wherein each primary optic of the plurality of primary optics is configured to emit light from the second emitting surface generally uniformly in a left-to-right perspective.

10. The lighting device of claim 1 wherein each primary optic of the plurality of primary optics is configured to emit light from the second emitting surface generally uniformly in a top-to-bottom perspective.

11. The lighting device of claim 1 wherein the second emitting surface of the plurality of primary optics is substantially smooth.

12. The lighting device of claim 1 wherein the plurality of features comprises alternating generally horizontal sections and slanted sections.

13. The lighting device of claim 1 wherein at least one of the plurality of primary optics and the secondary optic comprises a color conversion layer configured to receive light within a first wavelength range and to emit light within a second wavelength range.

14. The lighting device of claim 1 wherein at least one primary optic of the plurality of primary optics has a generally rectangular configuration.

15. The lighting device of claim 1 wherein a primary optic of the plurality of primary optics is oriented at an angle of approximately 90 degrees from another primary optic of the plurality of primary optics.