Device for Redirecting the Luminous Flux Emitted by One or More LED

• US 20090310368A1
• Filed: 04/30/2007
• Published: 12/17/2009
• Est. Priority Date: 04/28/2006
• Status: Active Grant

• Current Assignee: Incerti & Simonini Di Incerti Edda & C. S.N.C.
• Original Assignee: Incerti & Simonini Di Incerti Edda & C. S.N.C.
• Inventors: Incerti, Edda, Cucchi, Mauro
• Granted Patent: US 7,967,478 B2
• Time in Patent Office: Days
• US Class Current: 362/326
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 7/0016 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 Class Codes: F21V 7/0091 using total internal reflection
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00
• CPC Class Codes: G02B 19/0071 adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source

Abstract

The invention relates to a device for redistributing with axis rotated to 90° of the luminous flow emitted by one or more LEDs as secondary optical component for the construction of sources, lamps, illuminating bodies, and solid state optical signalling apparatuses. In one of its basic forms the invention comprises a main optical element (1) and an optical protection case (20) coupled by a pin (5) obtained in the element (1) and a cavity (21) obtained in the case (20).

Claims

1. A device for redistributing the luminous flow emitted by one or more LEDs (34) as indicated in FIG. 1 and characterised in that it comprises a main combined reflection/refraction optical element (1) made of PC and provided with:

a profile indicated by (2) that inferiorly by revolution around the axis of symmetry defines a surface characterising a conical cavity with the vertex positioned in opposite direction relative to the primary lenses of the LEDs (34),

a profile indicated by (4) that superiorly by revolution around the axis of symmetry defines a surface characterising a cupola-shaped cavity with the vertex positioned in the direction of the primary lenses of the LEDs (34);

a profile indicated by (3) that laterally by revolution around the axis of symmetry defines a surface characterising a cone frustum shaped solid with the vertex positioned in the direction of the primary lenses of the LEDs (34),

for the purposes of the 90°

rotation of the optical axis of the photometric solid emitted as well as to the variation of the upper and lower angles referred to said axis relative to that of the LEDs (34).

2. The device as claimed in claim 1, characterised in that said device is provided with a pin (5) for coupling to other components.

3. The device as claimed in claim 2, characterised in that said device is coupled on an optical protection case (20) by means of an inner cavity (21) for housing the pin (5) obtained in an inner thickening (23).

4. The device as claimed in claim 3, characterised in that said device is provided with an optical protection case (20) whose upper thickened region (23) determines a convex surface (22) so constructed as to have optical characteristics of diffuse reflection which concurs in the definition of the photometric solid.

5. The device as claimed in claim 4, characterised in that said device is provided with an optical protection case (20) provided with a cavity (24) for connection to a commercial solid state source.

6. The device as claimed in claim 5, as indicated in FIG. 2, characterised in that interposed between the surface (22) on the thickened region (23) and the main optical element (1) is an additional optical element (40) made of plastic material with added metal-coating having specular reflecting surface (41) which concurs in the definition of the photometric solid.

7. The device as claimed in claim 6, characterised in that the optical element (40) is provided with diffuse reflecting surface (41) which concurs in the definition of the photometric solid.

8. The device as claimed in claim 6, characterised in that the main optical element (1) and the additional element (40) are distanced by a spacer element (50).

9. The device as claimed in claim 7, characterised in that the main optical element (1) and the additional element (40) are distanced by a spacer element (50).

10. The device as claimed in claim 6, as indicated in FIG. 3 characterised in that the main optical element (1) has in the central part a hole (6) instead of the pin (5) in order to allow the insertion of a separate pin (60) provided with a retaining head (61) to reduce the slight luminous flow dispersed along the direction of the optical axis of the LEDs (34).

11. The device as claimed in claim 7, as indicated in FIG. 3 characterised in that the main optical element (1) has in the central part a hole (6) instead of the pin (5) in order to allow the insertion of a separate pin (60) provided with a retaining head (61) to reduce the slight luminous flow dispersed along the direction of the optical axis of the LEDs (34).

12. The device as claimed in claim 8, as indicated in FIG. 3 characterised in that the main optical element (1) has in the central part a hole (6) instead of the pin (5) in order to allow the insertion of a separate pin (60) provided with a retaining head (61) to reduce the slight luminous flow dispersed along the direction of the optical axis of the LEDs (34).

13. The device as claimed in claim 9, as indicated in FIG. 3, characterised in that the main optical element (1) has in the central part a hole (6) instead of the pin (5) in order to allow the insertion of a separate pin (60) provided with a retaining head (61) to reduce the slight luminous flow dispersed along the direction of the optical axis of the LEDs (34).

14. The device as claimed in claim 10, characterised in that the separate pin (60) is made of metallic material.

15. The device as claimed in claim 14, characterised in that the separate pin (60) is superficially coated with polished nickel.

16. The device as claimed in claim 14, characterised in that the separate pin (60) is superficially coated with polished chrome.

17. The device as claimed in claim 11, characterised in that the separate pin (60) is made of metallic material.

18. The device as claimed in claim 17, characterised in that the separate pin (60) is superficially coated with polished nickel.

19. The device as claimed in claim 17, characterised in that the separate pin (60) is superficially coated with polished chrome.

20. The device as claimed in claim 12, characterised in that the separate pin (60) is made of metallic material.

21. The device as claimed in claim 20, characterised in that the separate pin (60) is superficially coated with polished nickel.

22. The device as claimed in claim 20, characterised in that the separate pin (60) is superficially coated with polished chrome.

23. The device as claimed in claim 13, characterised in that the separate pin (60) is made of metallic material.

24. The device as claimed in claim 23, characterised in that the separate pin (60) is superficially coated with polished nickel.

25. The device as claimed in claim 23, characterised in that the separate pin (60) is superficially coated with polished chrome.

26. The device as claimed in claim 1, characterised in that the material whereof the main optical element (1) is made is PMMA.

27. The device as claimed in claim 1, characterised in that the material whereof the main optical element (1) is made is glass.

28. The device as claimed in claim 1, characterised in that the material whereof the main optical element (1) is made is crystal.

29. The device as claimed in claim 1, characterised in that the material whereof the optical protection case (20) is made is PMMA.

30. The device as claimed in claim 1, characterised in that the material whereof the optical protection case (20) is made is glass.

31. The device as claimed in claim 1, characterised in that the material whereof the optical protection case (20) is made is crystal.

32. The device as claimed in claim 1, characterised in that the material whereof the additional optical element (40) is made is metal.

33. The device as claimed in claim 1, characterised in that the spacer element (50) is obtained as an appendage of the additional optical element (40).

34. The device as claimed in claim 1, characterised in that the spacer element (50) is obtained as an appendage of the main optical element (1).

35. The device as claimed in claim 1, as described and illustrated herein with reference to the figures of the accompanying drawings and for the aforementioned purposes.

36. The device according to claim 1 and as described and illustrated herein with reference to the figures of the accompanying drawings and for the aforementioned purposes.