Multiple LED focused lighting device
View Patent ↗A multiple LED based lighting device for commercial indoor or outdoor architectural applications is disclosed. The lighting device uses multiple LEDs which are arranged in a symmetrical array in order to combine their light output. The LEDs are supported in a fixed position and have a conical reflector to assist in focusing the light output. A heat sink is attached to the LEDs to allow for use of high power for greater light output. The multiple LEDs are mounted relative to an optic fiber which has a core and cladding material to retain light based on total internal reflection. The light output from the LEDs are cast on the optic fiber which may provide side lighting effects from the perimeter of the optic fiber or emit light from the opposite end of the optic fiber.
1. A high output light emitting diode based lighting device, comprising:
a support bracket having a bottom surface and two opposite first and second ends;
a vertical support arm attached to the first end of the support bracket;
an optic fiber attached to the vertical support arm, the optic fiber having a core material and a surrounding cladding material with a receiving end fixed in relation to the support bracket;
a mounting arm attached to the second end of the support bracket, the mounting arm including multiple collars facing the receiving end of the optic fiber; and
a light emitting diode reflector assembly attached to each of the multiple collars, the light emitting diode reflector assembly having a conical body having an open end mated with the collar, and an opposite closed end holding a light emitting diode.
2. The lighting device of claim 1 wherein the conical body has a reflective interior surface and is shaped to focus light output from the light emitting diode to the optic fiber end.
3. The lighting device of claim 2 wherein the reflective interior surface is evaporated aluminum.
4. The lighting device of claim 1 further comprising a heat sink thermally coupled to the light emitting diodes.
5. The lighting device of claim 1 wherein the light emitting diode assembly includes a heat sink having a plate with a top side coupled to the conical body and a bottom side having protruding vanes.
6. The lighting device of claim 1 wherein the optic fiber includes a black jacket and emits light from the emitting end of the optic fiber.
7. The lighting device of claim 1 wherein the cladding material is translucent allowing light to leave the optic fiber along the perimeter of the optic fiber.
8. The lighting device of claim 1 wherein the optic fiber is bent in a non-linear shape.
9. The lighting device of claim 1 , wherein the multiple LEDs emit different colors producing a combined color from the optic fiber.
10. The lighting device of claim 1 , wherein the multiple LEDs emit the same color light.
11. A high output light emitting diode based lighting device, comprising:
a base member having a bottom surface and two opposite first and second ends;
a vertical support attached to the first end of the base support;
an optic fiber attached to the vertical support, the optic fiber having a core material and a surrounding cladding material with a receiving end fixed in relation to the base member;
a mounting support attached to the second end of the support base, the mounting support including multiple collars facing the receiving end of the optic fiber; and
a light emitting diode reflector assembly attached to each of the multiple collars, the light emitting diode reflector assembly having a conical body having an open end mated with the collar, and an opposite closed end holding a light emitting diode.
12. The lighting device of claim 11 wherein the conical body has a reflective interior surface and is shaped to focus light output from the light emitting diode to the optic fiber end.
13. The lighting device of claim 12 wherein the reflective interior surface is evaporated aluminum.
14. The lighting device of claim 11 , wherein the multiple LEDs emit the same color light.