High flux light emitting diode (LED) reflector arrays

• US 20050128744A1
• Filed: 12/11/2003
• Published: 06/16/2005
• Est. Priority Date: 12/11/2003
• Status: Active Grant

• Current Assignee: Dialight Corporation (Dialight PLC)
• Original Assignee: Dialight Corporation (Dialight PLC)
• Inventors: Verdes, Anthony, You, Chenhua, Lomberg, Markus, Yang, Yubo, Abdelhafez, Mohamed, Hertrich, Michael
• Granted Patent: US 7,281,818 B2
• Time in Patent Office: Days
• US Class Current: 362/241
• CPC Class Codes: F21V 17/12 by screwing
• CPC Class Codes: F21V 19/0035 the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 23/005 the substrate is supporting also the light source
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• CPC Class Codes: F21V 23/0457 the sensor sensing the operating status of the lighting device, e.g. to detect failure of a light source or to provide feedback to the device
• CPC Class Codes: F21V 7/0083 Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane combination of two or more reflectors F21V7/0025
• CPC Class Codes: F21V 7/09 with a combination of different curvatures
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A reflector device to be utilized with light emitting diodes (LEDs), and particularly with high-flux LEDs. In the reflector structure individual reflector portions surround at least one LED. Light output from each individual LED is reflected by sloping walls of each individual reflector portion and is redirected. As a result, light that may otherwise be lost is redirected to a more useful direction. Each individual reflector portion can have a cross-section of a conic shape, a complicated curve, and can also be oval in shape. A light device can be realized by utilizing such a master reflector with an LED light source.

Claims

1. A light reflector device configured to be used with a printed circuit board on which a plurality of light emitting diodes (LEDs) are mounted, comprising:

(a) a master reflector including a plurality of individual reflectors, one of said plurality of individual reflectors configured to surround at least one of the plurality of LEDs, each individual reflector including reflective surfaces surrounding the respective at least one of the plurality of LEDs.

2. A light reflector device according to claim 1, wherein said master reflector is made of molded plastic, and said reflective surfaces include an aluminum coating.

3. A light reflector device according to claim 1, wherein each individual reflector surrounds plural of the respective plurality of LEDs arranged linearly.

4. A light reflector device according to claim 1, wherein each individual reflector surrounds a single respective of the plurality of LEDs.

5. A light reflector device according to claim 1, wherein each individual reflector has a conic cross-section.

6. A light reflector device according to claim 1, wherein each individual reflector has a cross-section of a complicated curve.

7. A light reflector device according to claim 1, wherein each individual reflector has an oval shape around an axis of the respective one of the plurality of LEDs.

8. A light reflector device according to claim 1, wherein at least one of said individual reflectors is unsymmetric relative to the respective LED.

9. A light reflector device according to claim 1, further comprising:

(b) a light absorbing member extending from said master reflector.

10. A light reflector device according to claim 1, wherein each individual reflector includes a light absorbing area.

11. A light reflector device according to claim 1, wherein each individual reflector has the reflective surfaces as one of smooth surfaces or faceted surfaces.

12. A light reflector device according to claim 1, wherein each individual reflector includes on a reflective surface a specialized reflective zone to direct light to a sensor.

13. A light device comprising:

(a) a printed circuit board on which a plurality of light emitting diodes (LEDs) are mounted;

(b) a master reflector including a plurality of individual reflectors, one of said plurality of individual reflectors configured to surround at least one of the plurality of LEDs, each individual reflector including reflective surfaces surrounding the respective at least one of the plurality of LEDs.

14. A light reflector device according to claim 13, wherein said master reflector is made of molded plastic, and said reflective surfaces include an aluminum coating.

15. A light reflector device according to claim 13, wherein each individual reflector surrounds plural of the respective plurality of LEDs arranged linearly.

16. A light reflector device according to claim 13, wherein each individual reflector surrounds a single respective of the plurality of LEDs.

17. A light reflector device according to claim 13, wherein each individual reflector has a conic cross-section.

18. A light reflector device according to claim 13, wherein each individual reflector has a cross-section of a complicated curve.

19. A light reflector device according to claim 13, wherein each individual reflector has an oval shape around an axis of the respective one of the plurality of LEDs.

20. A light device according to claim 13, further comprising;

(c) connecting screws configured to secure said printed circuit board to said master reflector.

21. A light device according to claim 13, further comprising:

(c) a lens mounted to said master reflector.

22. A light device according to claim 13, wherein at least one of said individual reflectors is unsymmetric relative to the respective surrounded LED.

23. A light device according to claim 13, further comprising:

(c) a light absorbing member extending from said master reflector.

24. A light device according to claim 13, wherein each individual reflector includes a light absorbing area.

25. A light reflector device according to claim 13, wherein each individual reflector has the reflective surfaces as one of smooth surfaces or faceted surfaces.

26. A light reflector device according to claim 13, wherein each individual reflector includes on a reflective surface a specialized reflective zone to direct light to a sensor.

27. A light reflector device configured to be used with a printed circuit board on which a plurality of light emitting diodes (LEDs) are mounted, comprising:

(a) master reflecting means including a plurality of individual reflecting means, one of said plurality of individual reflecting means surrounding at least one of the plurality of LEDs and for reflecting light output from the respective at least one of the plurality of LEDs.

28. A light reflector device according to claim 27, further comprising:

(b) light absorbing means for absorbing impinging light.

29. A light device comprising:

(a) means for supporting a plurality of light emitting diodes (LEDs);

(b) master reflecting means including a plurality of individual reflecting means, one of said plurality of individual reflecting means surrounding at least one of the plurality of LEDs and for reflecting light output from the respective at least one of the plurality of LEDs.

30. A light device according to claim 29, further comprising:

(c) means for securing said means for supporting to said master reflecting means.

31. A light device according to claim 29, further comprising:

(c) optic means mounted to said master reflecting means.

32. A light device according to claim 29, further comprising:

(c) light absorbing means for absorbing impinging light.

33. A light device according to claim 29, wherein at least one individual reflecting means includes means for directing a portion of light output from a surrounded LED to a light sensor.