Lighting Assembly with LEDs and Four-Part Optical Elements

Patent metadata

Field	Value
Publication number	US-2017287371-A1
Application number	US-201715627089-A
Country	US
Kind code	A1
Filing date	Jun 19, 2017
Priority date	Jul 30, 2012
Publication date	Oct 5, 2017
Grant date	—

Abstract

A lighting assembly includes LEDs and associated optical elements. Each optical element includes a first portion, a second portion, a third portion and a fourth portion. The second portion of the optical element intersects with the first portion of the optical element in a region between the first portion and the second portion. The first portion of the optical element and the second portion of the optical element are shaped so that at least one surface normal of the first portion intersects with at least one surface normal of the second portion. The third portion of the optical element extends beyond the region between the first portion of the optical element and the second portion of the optical element in a direction away from the associated LED. The fourth portion is positioned proximate the respective LED below the first, second and third portions.

First claim

What is claimed is:

1 . An apparatus comprising a lighting assembly for illumination of an area, the lighting assembly comprising:
a plurality of light emitting diodes (LEDs); and a plurality of optical elements, wherein each optical element of the plurality of optical elements is proximate an associated LED of the plurality of LEDs; wherein each optical element of the plurality of optical elements includes a first portion, a second portion, a third portion and a fourth portion; wherein the second portion of the optical element intersects with the first portion of the optical element in a region between the first portion of the optical element and the second portion of the optical element, wherein the first portion of the optical element and the second portion of the optical element are shaped so that at least one surface normal of the first portion of the optical element intersects with at least one surface normal of the second portion of the optical element and wherein the first and the second portions of the optical element are configured so that the light from the associated LED exits the associated optical element through the first and the second portions; wherein the third portion of the optical element extends beyond the region between the first portion of the optical element and the second portion of the optical element in a direction away from the associated LED; and wherein the fourth portion is positioned proximate the respective LED, wherein the first, second and third portions are positioned above the fourth portion, the fourth portion having a first boundary enclosing a first surface adjacent the respective LED and a second boundary enclosing a second surface adjacent the first, second and third portions, the first boundary being smaller than the second boundary.

2 . The apparatus of claim 1 , wherein the lighting assembly is configured so that light directed from the lighting assembly is directed in a manner that does not create hot spots or result in dead spots on an area being illuminated regardless of whether all of the LEDs of the plurality of LEDs or some of the LEDs of the plurality of LEDs are functional.

3 . The apparatus of claim 1 , wherein the lighting assembly is configured so that when all LEDs are operational the lighting assembly will illuminate an area with a uniformity that achieves a 3:1 ratio of average illumination to minimum illumination across the area.

4 . The apparatus of claim 1 , wherein the lighting assembly is configured so that when some of the LEDs fail to be operational the apparatus will illuminate an area with a uniformity that achieves a 3:1 ratio of average illumination to minimum illumination across the area.

5 . The apparatus of claim 1 , wherein the lighting assembly is configured so that failure of one or more LEDs of the plurality of LEDs will cause an illumination level of light emitted from the lighting assembly to decrease while a uniformity of the light emitted from the lighting assembly remains substantially the same.

6 . The apparatus of claim 1 , wherein the lighting assembly is configured to illuminate an area having a width of 24 feet.

7 . The apparatus of claim 6 , wherein the area comprises a display surface of a billboard.

8 . The apparatus of claim 1 , wherein each optical element of the plurality of optical elements is separate from other optical elements of the plurality of optical elements.

9 . The apparatus of claim 1 , wherein all of the plurality of optical elements are part of a single substrate.

10 . The apparatus of claim 1 , wherein the lighting assembly is configured to simultaneously direct light with a substantially rectangular wavefront from each of the optical elements.

11 . An apparatus comprising a lighting assembly for illumination of an area, the assembly comprising:
a plurality of light emitting diodes (LEDs); and a plurality of optical elements, wherein each optical element of the plurality of optical elements is proximate an associated LED of the plurality of LEDs; wherein each optical element of the plurality of optical elements includes:
a first element;
a second element that intersects with the first element in a region between the first element and the second element, wherein the first element and the second element are shaped so that at least one surface normal of the first element intersect with at least one surface normal of the second element;
a third element extending beyond the region between the first element and the second element in a direction away from the associated LED; and
a fourth element positioned proximate the respective LED, wherein the first, second and third elements are positioned above the fourth element, the fourth element having a first boundary enclosing a first surface adjacent the respective LED and a second boundary enclosing a second surface adjacent the first, second and third elements, the first boundary being smaller than the second boundary.

12 . The apparatus of claim 11 , wherein the lighting assembly is configured so that light directed from the lighting assembly is directed in a manner that does not create hot spots or result in dead spots on an area being illuminated regardless of whether all of the LEDs of the plurality of LEDs or some of the LEDs of the plurality of LEDs are functional.

13 . The apparatus of claim 11 , wherein the lighting assembly is configured so that when all LEDs are operational the lighting assembly will illuminate an area with a uniformity that achieves a 3:1 ratio of average illumination to minimum illumination across the area.

14 . The apparatus of claim 11 , wherein the lighting assembly is configured so that when some of the LEDs fail to be operational the apparatus will illuminate an area with a uniformity that achieves a 3:1 ratio of average illumination to minimum illumination across the area.

15 . The apparatus of claim 11 , wherein the lighting assembly is configured so that failure of one or more LEDs of the plurality of LEDs will cause an illumination level of light emitted from the lighting assembly to decrease while a uniformity of the light emitted from the lighting assembly remains substantially the same.

16 . The apparatus of claim 11 , wherein the lighting assembly is configured to illuminate an area having a width of 24 feet.

17 . The apparatus of claim 16 , wherein the area comprises a display surface of a billboard.

18 . The apparatus of claim 11 , wherein each optical element of the plurality of optical elements is separate from other optical elements of the plurality of optical elements.

19 . The apparatus of claim 11 , wherein all of the plurality of optical elements are part of a single substrate.

20 . The apparatus of claim 11 , wherein the lighting assembly is configured to simultaneously direct light with a substantially rectangular wavefront from each of the optical elements.

21 . An apparatus comprising a lighting assembly for illumination of an area, the lighting assembly comprising:
a plurality of light emitting diodes (LEDs); and a plurality of optical elements, wherein each optical element of the plurality of optical elements is proximate an associated LED of the plurality of LEDs, wherein each optical element of the plurality of optical elements comprises:
a first side, a second side opposite the first side, and a third side perpendicular to the first side and the second side,
a first portion disposed at the first side,
a second portion disposed at the second

Assignees

• Ultravision Tech Llc

Inventors

• Auyeung David Siucheong
• Hall William Y
• Magarill Simon

Classifications

• F21Y2105/16

  square or rectangular, e.g. for light panels · CPC title

• F21V29/74

  with fins or blades · CPC title

• F21V29/503

  of light sources (cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H10H20/858) · CPC title

• G02B19/0028

  refractive and reflective surfaces, e.g. non-imaging catadioptric systems · CPC title

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title