초록 ▼

A lighting device having a dual LED point-source assembly containing two high flux LEDs mounted facing each other with LED lenses positioned between the LEDs. At least one heat sink is attached to one of the LEDs. The heat sinks serve to transfer heat from the LEDs to the outside environment. In one

A lighting device having a dual LED point-source assembly containing two high flux LEDs mounted facing each other with LED lenses positioned between the LEDs. At least one heat sink is attached to one of the LEDs. The heat sinks serve to transfer heat from the LEDs to the outside environment. In one embodiment the lighting device is positioned within a fresnel lens to produce a horizontally uniform distribution of light.

대표청구항 ▼

What is claimed is: 1. A marine safety lighting device comprising: (a) a coaxially aligned lighting subassembly having: (i) an LED module including a first lens and a second lens substantially identical to the first lens, each lens having a first side and a second opposed side, wherein the first si

What is claimed is: 1. A marine safety lighting device comprising: (a) a coaxially aligned lighting subassembly having: (i) an LED module including a first lens and a second lens substantially identical to the first lens, each lens having a first side and a second opposed side, wherein the first side of the first lens faces and abuts the first side of the second lens forming a lens interface, a first LED coaxially aligned with the first lens and attached to the second side of the first lens, a second LED coaxially aligned and facing the first LED, the second LED coaxially aligned with the second lens and attached to the second side of the second lens, a first thermally conductive mount attached to a side of the first LED opposed to the first lens, and a second thermally conductive mount attached to a side of the second LED opposed to the second lens, and (ii) a first heat sink having a first side and a second side, wherein the first side is mounted to a first end of the lighting subassembly and in thermal communication with the first thermally conductive mount of the LED module, (iii) a second heat sink mounted to a second end of the lighting subassembly and in thermal communication with the second thermally conductive mount of the LED module, (iv) a base unit secured to the second side of the first heat sink, and (v) a tubular member surrounding the LED module, wherein the tubular member links the first heat sink to the second heat sink and the base unit to form a mid-portion of the external surface of the lighting subassembly; (b) a power source for providing electrical power to the lighting subassembly; (c) a fresnel lens having a bull's eye, the fresnel lens encircling the lighting subassembly with the bull's eye aligned with the lens interface, whereby substantially all light emitted from the LED module passes through the tubular member first and then the bull's eye in uniformly distributed coordinates. 2. The lighting device of claim 1, wherein the first and second heat sinks are circular disks. 3. The lighting device of claim 1, wherein a first end of the tubular member is mounted in a first groove in the first heat sink and a second opposed end of the tubular member is mounted in a second groove in the base unit. 4. The lighting device of claim 1, wherein the tubular member is made of an optically transparent, heat resistant material. 5. The lighting device of claim 1, wherein the fresnel lens is hinged to a housing of a marine safety light. 6. The lighting device of claim 1, wherein the first heat sink, the second heat sink, and the base unit have a plurality of apertures for providing air circulation between a first air space located between the LED module and the tubular member and a second air space located between the tubular member and the fresnel lens. 7. The lighting device of claim 1, wherein the lighting device further comprises a power controller for regulating the polarity, voltage, and current limits of the electricity going to the LEDs. 8. The lighting device of claim 1, further comprising a threaded light socket base. 9. The lighting device of claim 1, further comprising a threaded light socket base electrically connected to the LED module. 10. The lighting device of claim 1, further comprising an air circulation means for removing heat generated by the LED module. 11. The lighting device of claim 1, wherein the first and second lens are trapezoidal. 12. A modular lighting subassembly for replacing a light source mounted in a fresnel lens of a marine safety light, the lighting subassembly including: (a) a stacked pair of contrapositioned substantially identical LED modules, wherein each LED module comprises: a light-emitting LED having a driving current of at least one Watt, a thermally conductive mount having a first side of the LED mounted on one side of the mount, and a trapezoidal LED lens coaxially aligned with the LED, the lens having a first transverse surface and second transverse surface parallel to the first transverse surface, wherein the first transverse surface is adhered to a second side of the LED opposite the thermally conductive mount, the LED lens refracts the light emanating from the LED to enhance the emission of light from a side of the LED, wherein the second transverse surface of the LED lens attached to the LED of one LED module faces and adjoins the second transverse surface of the LED lens mounted to the other LED; (b) a first heat sink having a first side and a second side, wherein the first side is positioned on a first end of the lighting subassembly and thermally communicating with at least one thermally conductive mount; (c) a second heat sink mounted on a second end of the lighting subassembly; (d) a base unit secured to the second side of the second heat sink; (e) an optically transparent tubular member encircling the stacked pair of LED modules, wherein a first end of the tubular member is mounted in a first groove in the first heat sink and a second end of the tubular member is mounted in a second groove in the base unit; and (f) a fresnel lens having a bull's eye, the fresnel lens encircling the tubular member with the bull's eye aligned with the stacked pair of LED modules, whereby substantially all light emitted from the LED modules passes through the bull's eye in uniformly distributed coordinates. 13. The lighting subassembly of claim 12 having a plurality of stacked pairs of LED modules. 14. The lighting subassembly of claim 12, wherein the first transverse surface is shorter than the second transverse surface. 15. The lighting subassembly of claim 12, wherein the second heat sink is mountable on a portion of a housing covered by the fresnel lens. 16. The lighting subassembly of claim 12, wherein the first heat sink and the base unit have a plurality of apertures, the apertures passing from a first air space located between the tubular member and the stacked pair of LED modules and a second air space located between the fresnel lens and the lighting subassembly. 17. The lighting subassembly of claim 12, further comprising a threaded light socket base electrically connected to the LEDs. 18. The lighting subassembly of claim 12, further comprising an air circulation means for removing heat generated by the stacked pair of LED modules. 19. The lighting subassembly of claim 12, having two stacked pairs of LED modules, wherein a height of the two stacked pairs of LED modules is less than or equal to a height of the bull's eye. 20. The lighting subassembly of claim 12, wherein a diameter of the first transverse surface is similar to a diameter of the LED. 21. The lighting subassembly of claim 12, wherein the first heat sink is larger than one LED module. 22. The lighting subassembly of claim 12, wherein the light refracted by the stacked pair of LED lens passes first through the tubular member and then through the bull's eye of the fresnel lens. 23. A marine safety lighting device comprising: (a) a coaxially aligned lighting subassembly having: (i) an LED module including a first lens and a second lens substantially identical to the first lens, each lens having a first side and a second opposed side, wherein the first side of the first lens faces and abuts the first side of the second lens forming a lens interface, a first LED coaxially aligned with the first lens and attached to the second side of the first lens, a second LED coaxially aligned and facing the first LED, the second LED coaxially aligned with the second lens and attached to the second side of the second lens, (ii) a first heat sink having a first side and a second side, wherein the first side is mounted to a first end of the lighting subassembly and in thermal communication with the first LED, (iii) a second heat sink mounted to a second end of the lighting subassembly and in thermal communication with the second LED, and (iv) a tubular member surrounding the LED module; (b) a fresnel lens having a bull's eye, the fresnel lens encircling the lighting subassembly with the bull's eye aligned with the lens interface, whereby substantially all light emitted from the LED module passes through the tubular member first and the bull's eye secondly in uniformly distributed coordinates. 24. The lighting device of claim 23, wherein a diameter of the second side of the first lens is similar to a diameter of the first LED. 25. The lighting device of claim 23, wherein the first LED is similar in size to the first lens. 26. The lighting device of claim 23, wherein a height of the LED module is less than or equal to the height of the first heat sink. 27. The lighting device of claim 23, wherein a height of the LED module is less than or equal to the height of the bull's eye.