Light reflector device for light emitting diode (LED) array
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 is realized by utilizing such a master reflector with an LED light source.
1. A light device comprising:
(a) a printed circuit board on which a plurality of light emitting diodes (LEDs) are mounted, a light intensity distribution output from the LEDs having 50% intensity values at about +/−60 degrees;
(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 an opening through which a respective at least one of the plurality of LEDs can pass, and including reflective surfaces as sidewalls of the opening surrounding the respective at least one of the plurality of LEDs; and
wherein one of the LEDs is placed in a center of a respective individual reflector at a position such that light output from the one LED beyond +/−50 degrees impinges on the reflective sidewalls to be reflected, and each individual reflector modifies a light intensity portion of the respective surrounded LED to provide a light output in which an intensity value near 0 degrees is about one-half intensity peaks beyond 20 degrees and beyond −20 degrees.
2. A light 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 device according to claim 1 , wherein each individual reflector surrounds plural of the respective plurality of LEDs arranged linearly.
4. A light device according to claim 1 , wherein each individual reflector surrounds a single respective of the plurality of LEDs.
5. A light device according to claim 1 , wherein each individual reflector has a conic cross-section.
6. A light device according to claim 1 , wherein each individual reflector has a cross-section of a complicated curve.
7. A light 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 device according to claim 1 , further comprising;
(c) connecting screws configured to secure said printed circuit board to said master reflector.
9. A light device according to claim 1 , further comprising:
(c) a lens mounted to said master reflector.
10. A light device according to claim 1 , wherein at least one of said individual reflectors is unsymmetric relative to the respective surrounded LED.
11. A light device according to claim 1 , further comprising:
(c) a light absorbing member extending from said master reflector.
12. A light device according to claim 1 , wherein each individual reflector includes a light absorbing area.
13. A light reflector device according to claim 1 , wherein each individual reflector has the reflective surfaces as one of smooth surfaces or faceted surfaces.
14. A light device according to claim 1 , further comprising:
(b) a light sensor;
wherein each individual reflector includes on a reflective surface a specialized reflective zone to direct light to the light sensor.
15. A light device according to claim 1 , the intensity peaks of the intensity pattern are located at approximately +35 degrees and −35 degrees.
16. A light device comprising:
(a) means for supporting a plurality of light emitting diodes (LEDs), a light intensity distribution output from the LEDs having 50% intensity values at about +/−60 degrees;
(b) master reflecting means including a plurality of individual reflecting means, one of said plurality of individual reflecting means including an opening through which a respective at least one of the plurality of LEDs can pass, and including reflective surfaces as sidewalls of the opening 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; and
wherein one of the LEDs is placed in a center of a respective individual reflecting means at a position such that light output from the one LED beyond +/−50 degrees impinges on the reflective sidewalls to be reflected, and each individual reflecting means modifies a light intensity portion of the surrounded LED to provide a light output in which an intensity value near 0 degrees is about one-half intensity peaks beyond 20 degrees and beyond −20 degrees.
17. A light device according to claim 16 , further comprising:
(c) means for securing said means for supporting to said master reflecting means.
18. A light device according to claim 16 , further comprising:
(c) optic means mounted to said master reflecting means.
19. A light device according to claim 16 , further comprising:
(c) light absorbing means for absorbing impinging light.
20. A light device according to claim 16 , further comprising:
(b) a light sensor;
wherein each individual reflector includes on a reflective surface a specialized reflective zone to direct light to the light sensor.
21. A light device according to claim 16 , the intensity peaks of the intensity pattern are located at approximately +35 degrees and −35 degrees.