Light-directing apparatus with protected reflector-shield and lighting fixture utilizing same

• US 7,891,835 B2
• Filed: 07/15/2008
• Issued: 02/22/2011
• Est. Priority Date: 07/15/2008
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: Ruud Lighting Incorporated (Wolfspeed, Inc.)
• Inventors: Wilcox, Kurt S.
• Primary Examiner(s): Lee; Jong-Suk (James)
• Assistant Examiner(s): WEINBERG, STANLEY M
• Application Number:
  US12/173,149
• Publication Number:
  US 20100014290A1
• Time in Patent Office: 952 Days
• Field of Search: 362/217.02, 362/217.05, 362242-248, 362/327, 362/328, 362/509, 362/520
• US Class Current: 362/245
• 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: F21S 8/085 of high-built type, e.g. street light
• CPC Class Codes: F21V 11/16 using sheets without apertures, e.g. fixed
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 13/10 the elements being reflectors and screens
• CPC Class Codes: F21V 13/12 Combinations of only three kinds of elements
• CPC Class Codes: F21V 14/00 Controlling the distribution of the light emitted by adjustment of elements reflectors with provision for adjusting the curvature F21V7/16; light filters or the like with provision for controlling the colour or intensity F21V9/40; screens using adjustable parallel laminae or strips F21V11/04; screens using iris-type diaphragms F21V11/10; screens using movable sheets without apertures F21V11/18; adjustable mountings for lighting devices F21V21/14
• CPC Class Codes: F21V 17/005 with keying means, i.e. for enabling the assembling of component parts in distinctive positions, e.g. for preventing wrong mounting
• CPC Class Codes: F21V 19/02 with provision for adjustment, e.g. for focusing
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 9/40 with provision for controlling spectral properties, e.g. colour, or intensity
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light-directing apparatus for off-axial preferential-side distribution of light from a light emitter having an emitter axis, including a lensing member positioned over the light emitter a shield member embedded within the lensing member in a position in the path of light emitted toward a non-preferential side. The lensing member having a proximal end substantially transverse the emitter axis and an outer surface configured for refracting light from the emitter. The shield member may be snugly received in a shield-receiving void of an inner surface of the lensing member. Alternatively, the shield member is embedded by the lensing member having been molded thereabout. Another aspect of this invention is a lighting fixture utilizing such light-directing apparatus.

Claims

1. A light-directing apparatus for off-axial preferential-side distribution of light from a light emitter having an emitter axis, comprising:

a lensing member positioned over the light emitter and having;

a proximal end substantially transverse the emitter axis and defining a shield-insertion opening;

an inner surface defining an off-axis shield-receiving void extending from the shield-insertion opening; and

an outer surface configured for refracting light from the emitter in a predominantly off-axial direction toward a preferential side; and

a shield member snugly received in the shield-receiving void in a position in the path of light emitted toward a non-preferential side, the shield member including;

a shield portion extending into the path of light emitted toward the non-preferential side and including a reflective front surface in the path of light emitted toward the non-preferential side to redirect such light toward the preferential side; and

a base portion extending from the shield portion away from the light emitter at the proximal end of the lensing member.

2. The light-directing apparatus of claim 1 wherein the proximal end of the lensing member further defines an emitter-insertion opening and the inner surface defines an emitter-receiving void extending from the emitter-insertion opening and facing the emitter.

3. The light-directing apparatus of claim 2 wherein the shield-insertion opening and the emitter-receiving opening are in communication and form a single proximal-end opening.

4. The light-directing apparatus of claim 3 wherein the shield-receiving void is contiguous with the emitter-receiving void.

5. The light-directing apparatus of claim 1 wherein the reflective front surface is entirely within the lensing member.

6. The light-directing apparatus of claim 5 wherein the reflective front surface of the shield member is of non-planar configuration.

7. The light-directing apparatus of claim 6 wherein the reflective front surface of the shield member has a plurality of sections angled with respect to each other.

8. The light-directing apparatus of claim 7 wherein the sections are each substantially planar.

9. The light-directing apparatus of claim 1 wherein the light emitter comprises an LED.

10. The light-directing apparatus of claim 1 wherein:

the light emitter is an LED package including at least one LED and a primary lens over the LED;

the lensing member is a secondary lens placed over the primary lens; and

the shield member includes a reflective front surface generally facing the primary lens.

11. The light-directing apparatus of claim 1 wherein the lensing member includes an outward flange around the opening at the proximal end.

12. A lighting fixture with a plurality of light emitters spaced from one another on a mounting board, each light emitter having an emitter axis substantially parallel to the axes of the other light emitters, and a light-directing apparatus positioned over the light emitters for off-axial preferential-side distribution of light from the emitters, the light-directing apparatus comprising:

a plurality of lensing members each positioned over one light emitter and each having;

a proximal end substantially transverse the emitter axis and defining a shield-insertion opening;

an inner surface defining an off-axis shield-receiving void extending from the shield-insertion opening; and

an outer surface configured for refracting light from the emitter in a predominantly off-axial direction toward a preferential side; and

a plurality of shield members snugly received in the shield-receiving void of the corresponding lensing member in a position in the path of light emitted toward a non-preferential side, each shield member including;

a shield portion extending into the path of light emitted toward the non-preferential side and including a reflective front surface in the path of light emitted toward the non-preferential side to redirect such light toward the preferential side; and

a base portion extending from the shield portion away from the light emitter at the proximal end of the lensing member.

13. The lighting fixture of claim 12 wherein the proximal end of the lensing member further defines an emitter-insertion opening and the inner surface defines an emitter-receiving void extending from the emitter-insertion opening and facing the emitter.

14. The lighting fixture of claim 13 wherein the shield-insertion opening and the emitter-receiving opening are in communication and form a single proximal-end opening.

15. The lighting fixture of claim 14 wherein the shield-receiving void is contiguous with the emitter-receiving void.

16. The light-directing apparatus of claim 12 wherein the reflective front surface is entirely within the lensing member.

17. The light-directing apparatus of claim 16 wherein the reflective front surface of the shield member is of non-planar configuration.

18. The light-directing apparatus of claim 12 wherein the light emitter comprises an LED.

19. The light-directing apparatus of claim 12 wherein the lensing member includes an outward flange around the opening at the proximal end.

20. A light-directing apparatus for off-axial preferential-side distribution of light from a light emitter having an emitter axis, comprising:

a lensing member positioned over the light emitter and having;

a proximal end substantially transverse the emitter axis and defining a shield-insertion opening;

an inner surface defining an off-axis shield-receiving void extending from the shield-insertion opening; and

an outer surface configured for refracting light from the emitter in a predominantly off-axial direction toward a preferential side; and

a shield member snugly received in the shield-receiving void in a position in the path of light emitted toward a non-preferential side, the shield member including a reflective front surface entirely within the lensing member in the path of light emitted toward the non-preferential side to redirect such light toward the preferential side, the reflective front surface being of non-planar configuration and having a plurality of sections angled with respect to each other, each section being substantially planar.

21. A lighting fixture with a plurality of light emitters spaced from one another on a mounting board, each light emitter having an emitter axis substantially parallel to the axes of the other light emitters, and a light-directing apparatus positioned over the light emitters for off-axial preferential-side distribution of light from the emitters, the light-directing apparatus comprising:

a plurality of lenses each positioned over one light emitter and each having;

a proximal end transverse the emitter axis; and

an outer surface configured for refracting light from the emitter; and

a plurality of shield members each disposed within the corresponding lens in a position in the path of light emitted from the corresponding light emitter toward a non-preferential side, each shield member including a reflective front surface entirely within the corresponding lens in the path of light emitted by the corresponding light emitter toward the non-preferential side to redirect such light toward the preferential side, the reflective front surface being of non-planar configuration and having a plurality of sections angled with respect to each other, the sections being each substantially planar.

22. The lighting fixture of claim 21 wherein each lens is a separate piece.

23. The lighting fixture of claim 21 wherein the lenses have preferential sides in the same lateral direction, thereby to facilitate illumination toward one lateral direction.

24. The lighting fixture of claim 21 wherein the lenses have preferential sides in different lateral directions, thereby to facilitate illumination in different lateral directions.

25. The lighting fixture of claim 24 wherein:

the lenses are arranged in a substantially circular pattern; and

each lens has a preferential side oriented in a substantially radially outward direction with respect to the circular pattern.

26. The lighting fixture of claim 21 wherein:

the proximal end of each lens defines a shield-insertion opening and an emitter-insertion opening; and

each lens includes an inner surface which defines an off-axis shield-receiving void extending from the shield-insertion opening and an emitter-receiving void extending from the emitter-insertion opening and facing the corresponding emitter.

27. The lighting fixture of claim 26 wherein each shield member is snugly received in the shield-receiving void of a corresponding one of the lenses.

28. The lighting fixture of claim 21 wherein each shield member is embedded by the lensing member having been molded thereabout.

29. The light-directing apparatus of claim 21 wherein the light emitter comprises an LED.

30. The lighting fixture of claim 21 wherein:

each light emitter is an LED package including at least one LED and a primary lens over the LED;

each lens is a secondary lens placed over a corresponding primary lens; and

each shield member includes a reflective front surface generally facing the primary lens.

31. The lighting fixture of claim 30 wherein each secondary lens is a separate piece.