Glare reduced compact lens for high intensity light source

Patent metadata

Field	Value
Publication number	US-9995439-B1
Application number	US-201414336276-A
Country	US
Kind code	B1
Filing date	Jul 21, 2014
Priority date	May 14, 2012
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

Compact reflective lens for a high intensity light emitting diode light sources having improved output beam characteristics are disclosed. The reflective lenses can be configured to increase output intensity, control output light characteristics, and reduce glare.

First claim

What is claimed is:

1. A light source comprising:
a light assembly comprising a plurality of LED light sources configured to output light;
a heat sink coupled to the light assembly configured to dissipate heat generated by the light assembly;
a lens assembly configured to:
receive light from said light assembly; and
emit first and second light at a plurality of angles relative to a central geometric axis of said plurality of LED light sources,
wherein said first light is emitted at angles in a range of 0-30 degrees and has a first maximum intensity, and said second light is emitted at angles above 30 degrees has a second maximum intensity, and

a glare reduction element disposed relative to said light assembly such that at least a portion of said light from said light assembly is incident upon said glare reduction element to restrict said second maximum intensity such that the ratio of said second maximum intensity to said first maximum intensity is less than 1:1000.

2. The light source of claim 1 , wherein the ratio of the first maximum intensity to the second maximum intensity is within a range from about 1:1000 to about 1:5000.

3. The light source of claim 1 , wherein the second angle is within a range from about 30 degrees to about 45 degrees relative to the central geometric axis.

4. The light source of claim 1 , wherein the lens assembly comprises
a lens characterized by a first diameter, wherein the glare reduction element is characterized by a second diameter; and
wherein a ratio between the second diameter and the first diameter is within a range from about 1:2.5 to about 1:4.5.

5. The light source of claim 4 , wherein,
the ratio between the second diameter and the first diameter is within a range of about 1:2.7 to about 1:4.3; and
the maximum beam intensity is within a range from about 3000 candle power to about 3100 candle power for a source scaled to 100 lumens.

6. The light source of claim 1 , wherein the lens assembly comprises a lens characterized by a diameter and a height,
wherein a ratio between the diameter and the height is within a range from about 5:1 to about 7:1.

7. The light source of claim 1 , wherein said a glare reduction element is a discrete element.

8. The light source of claim 7 , wherein said glare reduction element is disposed on said lens assembly such that said central geometric axis passes through said glare reduction element.

9. The light source of claim 4 , wherein said glare reduction element is disposed on said lens assembly such that said central geometric axis passes through said glare reduction element.

10. The light source of claim 1 , wherein said glare reduction element is a magnet or magnetic.

Assignees

• Soraa Inc

Inventors

• Shum Frank Tin Chung
• Krames Michael Ragan

Classifications

• F21V13/04

  the elements being reflectors and refractors {(for vehicle rear lights F21S43/40)} · CPC title

• F21K9/54 Primary

  Mechanical Engineering · mapped topic

• F21V7/0016 Primary

  on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes · CPC title

• F21V17/105 Primary

  using magnets · CPC title

• F21V29/74

  with fins or blades · CPC title