LED luminaire light redirection shield

• US 8,511,865 B2
• Filed: 05/09/2011
• Issued: 08/20/2013
• Est. Priority Date: 05/10/2010
• Status: Active Grant

• Current Assignee: Leotek Corporation
• Original Assignee: Leotek Electronics USA Corporation (Lite-On Technology Corporation)
• Inventors: Tu, Chin-Wang, Wang, Shih Chang, Hsu, Pin-Hao, Cheng, Yi-Kai
• Primary Examiner(s): Alavi, Ali
• Application Number:
  US13/103,752
• Publication Number:
  US 20120008320A1
• Time in Patent Office: 834 Days
• Field of Search: 362/228, 362/231, 362/279, 362/280, 362290-293, 362/341, 362/342
• US Class Current: 362/342
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21V 11/02 using parallel laminae or strips, e.g. of Venetian-blind type F21V11/06 takes precedence
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• CPC Class Codes: F21V 7/05 plane
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lamp that includes a housing forming an open cavity, a plurality of LEDs configured to produce a light output disposed in the cavity, a lens disposed over the LEDs for focusing and/or diffusing the light output, and a redirection shield disposed in the cavity. The redirection shield includes a base plate with a plurality of apertures formed therein, and a plurality of shielding plates extending from a top surface of the base plate. The LEDs extend through the apertures. The shielding plates block a portion of the light output such that an overall light distribution of the light output from the LED lamp is asymmetric.

Claims

1. An LED lamp, comprising:

a redirection shield that includes;

a base plate with a plurality of apertures formed therein in the form of spaced apart continuous open elongated slots, and

a plurality of shielding plates extending from a top surface of the base plate; and

a plurality of LEDs configured to produce a light output and extending through the apertures such that multiple ones of the plurality of LEDs extend through each of the continuous open elongated slots, wherein each of the shielding plates is adjacent to and blocks a portion of the light output directly from a multitude of the plurality of LEDs such that an overall light distribution of the light output from the LED lamp is asymmetric.

2. The LED lamp of claim 1, wherein the shielding plates are configured with a light absorptive material that blocks the light output portion by light absorption.

3. The LED lamp of claim 1, wherein the shielding plates are configured with a light reflecting material that blocks the light output portion by light reflectivity.

4. The LED lamp of claim 1, wherein:

the LEDs are arranged in a plurality of rows and columns.

5. The LED lamp of claim 4, wherein the shielding plates extend from the top surface of the base plate in an orthogonal manner.

6. The LED lamp of claim 4, wherein for each of the rows of LEDs, one of the shielding plates extends from the top surface of the base plate and along the row of LEDs, and leaning toward the LEDs of the row.

7. The LED lamp of claim 4, wherein for each of the rows of LEDs, one of the shielding plates extends from the top surface of the base plate and along the row of LEDs, and leaning away from the LEDs of the row.

8. The LED lamp of claim 4, wherein each of the rows of LEDs extends through one of the continuous open elongated slots.

9. The LED lamp of claim 4, wherein each of the columns of LEDs extends through one of the continuous open elongated slots.

10. The LED lamp of claim 1, wherein at least one of the shielding plates extends from the top surface of the base plate in a concave or convex manner.

11. The LED lamp of claim 1, wherein one of the shielding plates varies in dimension or shape relative to another one of the shielding plates.

12. The LED lamp of claim 1, wherein the shielding plates are configured to asymmetrically block the light output from the LEDs.

13. The LED lamp of claim 1, wherein at least one of the shielding plates extends from the top surface of the base plate in a planar manner.

14. The LED lamp of claim 1, wherein at least one of the shielding plates has an L-shape that extends up and partially over at least one of the rows of the LEDs.

15. An LED lamp, comprising:

a housing forming an open cavity;

a plurality of LEDs configured to produce a light output disposed in the cavity;

a lens disposed over the LEDs; and

a redirection shield disposed in the cavity that includes;

a base plate with a plurality of apertures formed therein in the form of spaced apart continuous open elongated slots, and

a plurality of shielding plates extending from a top surface of the base plate, wherein the LEDs extend through the apertures such that multiple ones of the plurality of LEDs extend through each of the continuous open elongated slots, and wherein each of the shielding plates is adjacent to and blocks a portion of the light output directly from a multitude of the plurality of LEDs such that an overall light distribution of the light output from the LED lamp is asymmetric.

16. The LED lamp of claim 15, wherein:

the LEDs are arranged in a plurality of rows and columns.

17. The LED lamp of claim 16, wherein the shielding plates extend from the top surface of the base plate in an orthogonal manner.

18. The LED lamp of claim 16, wherein for each of the rows of LEDs, one of the shielding plates extends from the top surface of the base plate and along the row of LEDs, and leaning toward the LEDs of the row.

19. The LED lamp of claim 16, wherein for each of the rows of LEDs, one of the shielding plates extends from the top surface of the base plate and along the row of LEDs, and leaning away from the LEDs of the row.

20. The LED lamp of claim 16, wherein each of the rows of LEDs extends through one of the continuous open elongated slots.

21. The LED lamp of claim 16, wherein each of the columns of LEDs extends through one of the continuous open elongated slots.

22. The LED lamp of claim 15, wherein at least one of the shielding plates extends from the top surface of the base plate in a concave or convex manner.

23. The LED lamp of claim 15, wherein one of the shielding plates varies in dimension or shape relative to another one of the shielding plates.

24. The LED lamp of claim 15, wherein the lens focuses or diffuses the light output.

25. The LED lamp of claim 15, wherein the shielding plates are configured to asymmetrically block the light output from the LEDs.

26. The LED lamp of claim 15, wherein the shielding plates are configured with a light absorptive material that blocks the light output portion by light absorption.

27. The LED lamp of claim 15, wherein the shielding plates are configured with a light reflecting material that blocks the light output portion by light reflectivity.

28. The LED lamp of claim 15, wherein at least one of the shielding plates extends from the top surface of the base plate in a planar manner.

29. The LED lamp of claim 15, wherein at least one of the shielding plates has an L-shape that extends up and partially over at least one of the rows of the LEDs.