LED flashlight
First Claim
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1. A lighting device comprising:
- a source of energy;
a light source coupled to said source of energy;
a reflector that reflects light including a first open end, a second end, and a parabolic profile extending between said first open end and said second end, wherein the focus of said parabolic profile is located outside said parabolic profile;
a holder that holds said light source relative to said reflector such that light generated by said light source is reflected by said reflector.
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Abstract
A lighting device with improved optical performance and efficiency is provided. The lighting device includes a source of energy, a light source, a reflector and a holder. The reflector has a first open end, a second end, and a parabolic profile extending between the first open end and second end. The focus of the parabolic profile is located outside of the profile. The reflector may also be movable relative to the light source. The lighting device may include a circuit that delivers a pulsed or thermally compensated pulsed current to the light source. The light device may also include a heat sink housing.
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Citations
55 Claims
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1. A lighting device comprising:
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a source of energy;
a light source coupled to said source of energy;
a reflector that reflects light including a first open end, a second end, and a parabolic profile extending between said first open end and said second end, wherein the focus of said parabolic profile is located outside said parabolic profile;
a holder that holds said light source relative to said reflector such that light generated by said light source is reflected by said reflector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A flashlight comprising:
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a portable source of energy;
an LED lamp that substantially radiates light spherically over an angle less than 180°
coupled to the portable source of energy; and
a parabolic reflector that reflects light radiated by said LED lamp, said reflector including a first open end, a second open end and an axis extending between said ends, wherein the focus of said parabolic reflector is not located between said first open end and said second open end, wherein the focal length is between 0.020-0.050 inch. - View Dependent Claims (19)
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20. A flashlight comprising:
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a portable source of power;
a light source coupled to said portable source of power including an LED and a lens, wherein said lens is arranged over the LED such that light substantially radiates from said light source at an angle less than 180°
relative to the LED position; and
a movable parabola shaped reflector for reflecting light radiating from said light source including a first open end, a second open end, and a parabolic profile extending between the first open end and the second open end, wherein the focus of the parabola is located outside the parabolic profile. - View Dependent Claims (21, 22)
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23. A flashlight comprising:
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a source of energy;
a light source coupled to said source of energy;
a reflector for reflecting light from said light source including a first open end, a second open end, and a parabolic profile extending between said first open end and said second open end, said first open end adapted to emit a light beam, wherein the focus of said parabolic profile is not located between the first open end and the second open end; and
a current modulating circuit coupled to said light source, wherein said current modulating circuit delivers a pulsed current to said light source. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A flashlight comprising:
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a portable source of energy;
an LED lamp that substantially radiates light spherically over an angle less than 180°
coupled to said portable source of energy; and
a reflector that reflects light radiated by said LED lamp including a first open end, a second open end, and a parabolic profile extending between said first open end and said second open end, said parabolic profile conforming to a profile according to the equation r2=4 fz, wherein “
r”
is the radius of the parabolic profile normal to the axis of the reflector, “
f”
is the distance between the focal point and the vertex of said parabolic profile set at between 0.020-0.050 inch, and “
z”
is the distance in the reflector axis direction;
wherein said first open end has a diameter larger than said second open end, wherein said second open end has a diameter between 0.20-0.30 inch. - View Dependent Claims (32, 33)
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34. A flashlight comprising:
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a portable source of energy;
an LED lamp including a first lead and a second lead; and
an electrical circuit including a heat sink housing that electrically couples said first lead and said portable source of energy, wherein said heat sink housing is thermally coupled to said LED lamp to substantially dissipate heat generated therefrom. - View Dependent Claims (35)
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36. An energy source assembly comprising:
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a plurality of energy sources; and
a housing adapted to receive said plurality of energy sources, said housing including a plurality of conductors, a first electrode, a second electrode and an outer feature;
wherein said plurality of conductors are selectively disposed to electrically couple said plurality of energy sources in an electrical circuit arrangement, wherein said electrical circuit arrangement includes a first terminal and a second terminal, wherein said first terminal is coupled to said first electrode, wherein said second terminal is coupled to said second electrode, and wherein said second electrode is disposed about the outer feature of said housing. - View Dependent Claims (37, 38, 39, 40, 41)
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42. A lighting device comprising:
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an energy source assembly including a plurality of energy sources and a housing, said housing adapted to receive said plurality of energy sources, said housing having a plurality of conductors, a first electrode, a second electrode and an outer feature, wherein said plurality of conductors are selectively disposed to electrically couple said plurality of energy sources in an electrical circuit arrangement, wherein said electrical circuit arrangement includes a first terminal and a second terminal, wherein said first terminal is coupled to said first electrode, wherein said second terminal is coupled to said second electrode, and wherein said second electrode is disposed about the outer feature of said housing;
a light source coupled to said plurality of energy sources; and
a barrel configured to receive said energy source assembly, wherein said barrel is suitable to conduct electricity;
wherein said second electrode of said energy source assembly electrically contacts said barrel. - View Dependent Claims (43, 44, 45, 46, 47, 48)
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49. A lighting device comprising:
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a source of energy;
a light source coupled to said source of energy;
a temperature responsive resistor disposed to detect the temperature of said light source;
a current modulating circuit coupled to said temperature responsive resistor, wherein said current modulating circuit delivers a thermally compensated pulsed current to said light source. - View Dependent Claims (50, 51, 52, 53, 54, 55)
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Specification