LED devices for offset wide beam generation

• US 10,400,996 B2
• Filed: 03/04/2019
• Issued: 09/03/2019
• Est. Priority Date: 08/14/2008
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Inventors: Holder, Ronald G., Rhoads, Greg
• Primary Examiner(s): Han, Jason M
• Application Number:
  US16/292,097
• Publication Number:
  US 20190203912A1
• Time in Patent Office: 183 Days
• Field of Search: 362240, 362245, 36224902, 36231102, 362327-329
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 17/101 permanently, e.g. welding, gluing or riveting
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21V 7/0066 specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified F21V7/16 - F21V7/30 take precedence
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A light source is combined with an optic and a reflector. Light incident onto to the reflector is reflected with a single reflection. The reflector occupies a portion of a solid angle around the light source to the exclusion of the optic at least with respect to any optical function. The reflector directly receives a second portion of light. The optic occupies substantially all of the remaining portion of the predetermined solid angle to directly receive a first portion of light from the light source. A reflected beam from the reflector is reflected into a predetermined reflection pattern. The inner and/or outer surface of the optic is shaped to refract or direct light which is directly transmitted into the optic from the light source from a first portion of light and/or reflected into the optic from the reflector from the reflected beam into a predetermined beam.

Claims

1. A light source comprising:

a light emitting diode; and

an optic that is disposed adjacent the light emitting diode and that comprises;

a first side oriented to receive light produced by the light emitting diode;

a second side that opposes the first side and that is oriented to emit the light received by the optic via the first side; and

a reflector disposed between the second side and the light emitting diode so as to reflect a portion of the light produced by the light emitting diode, the reflector having a curved shape and extending in an azimuthal angle of approximately 180 degrees about the light emitting diode,

wherein the second side comprises;

a base region that is substantially flat and that meets a bulbous region to form a corner between the bulbous region and the base region, wherein the corner peripherally circumscribes the bulbous region.

2. The light source of claim 1, wherein the first side comprises a cavity and wherein at least a portion of the reflector is disposed in the cavity.

3. The light source of claim 1, wherein the base region comprises a flange.

4. The light source of claim 1, wherein all of the bulbous region is rotationally symmetric.

5. The light source of claim 1, wherein the second side of the optic substantially consists of:

the bulbous region;

the base region; and

the corner.

6. The light source of claim 1, wherein the second side of the optic consists of:

the bulbous region;

the base region; and

the corner.

7. The light source of claim 1, wherein the base region is flat.

8. The light source of claim 1, wherein the bulbous region of the second side is environmentally exposed.

9. A light source comprising:

a light emitting diode; and

an optic that is disposed adjacent the light emitting diode and that comprises;

a first side positioned to receive light produced by the light emitting diode;

a second side that is disposed opposite the first side and that is positioned to emit the light produced by the light emitting diode; and

a reflector disposed between the second side and the light emitting diode, the reflector having a curved shape and extending in an azimuthal angle greater than 165 degrees and less than 270 degrees about the light emitting diode,

wherein the second side of the optic comprises;

a base region and a bulbous region; and

wherein an end of the reflector is disposed in a notch, the notch located in the bulbous region and on the first side of the optic, wherein the notch terminates before reaching the second side of the optic.

10. The light source of claim 9, wherein the second side of the optic comprises a corner formed between the base region and the bulbous region, wherein the bulbous region is circumscribed by the corner.

11. The light source of claim 9, wherein the base comprises a flange that is disposed so as to be substantially outside of range of the light produced by the light emitting diode.

12. The light source of claim 9, wherein at least the bulbous region of the second side is environmentally exposed.

13. The light source of claim 9, wherein the reflector is disposed on a first side of the light emitting diode in order to reflect a portion of the light across the optic to create an asymmetrical distribution of the light produced by the light emitting diode.

14. A light source comprising:

a light emitting diode; and

an optic that is positioned to receive light emitted by the light emitting diode, the optic comprising;

a first side that is oriented towards the light emitting diode;

a second side that opposes the first side and that comprises;

a corner that extends peripherally with respect to the light emitting diode; and

a surface region that is circumscribed by the corner; and

a reflector disposed between the second side and the light emitting diode, the reflector having a curved shape and extending in an azimuthal angle greater than 165 degrees and less than 270 degrees about the light emitting diode.

15. The light source of claim 14, wherein the reflector is oriented to produce an asymmetrical pattern of light.

16. The light source of claim 14, wherein the second side further comprises a base region that extends outward from the corner, and

wherein the corner is formed between the base region and the surface region.

17. The light source of claim 14, wherein the surface region extends over the light emitting diode.

18. The light source of claim 14, wherein the reflector is disposed between the surface region and the light emitting diode.

19. The light source of claim 14, wherein the surface region is bulbous.

20. The light source of claim 14, wherein the first side comprises a concave area that forms a cavity.