LED flashlight
First Claim
Patent Images
1. A flashlight comprising:
- a source of energy;
an LED light source coupled to said source of energy by an electrical circuit; and
a reflector that reflects light emanating from said LED light source, said reflector including a first open end, a second end, and a parabolic profile extending between said first open end and said second end;
wherein the electrical circuit includes a switch assembly having a substantially hollow heat sink housing that holds said LED light source relative to said reflector such that light generated by said LED light source is reflected by said reflector; and
wherein the substantially hollow heat sink housing forms part of the electrical circuit and thermally conducts heat from the LED light source.
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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.
100 Citations
19 Claims
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1. A flashlight comprising:
- a source of energy;
an LED light source coupled to said source of energy by an electrical circuit; and
a reflector that reflects light emanating from said LED light source, said reflector including a first open end, a second end, and a parabolic profile extending between said first open end and said second end;
wherein the electrical circuit includes a switch assembly having a substantially hollow heat sink housing that holds said LED light source relative to said reflector such that light generated by said LED light source is reflected by said reflector; and
wherein the substantially hollow heat sink housing forms part of the electrical circuit and thermally conducts heat from the LED light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a source of energy;
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15. A flashlight comprising:
- a source of energy;
an LED light source coupled to said source of energy by an electrical circuit;
a reflector for reflecting light from said LED 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 said first open end is larger than said second end, wherein the ratio between the distance of the second end from the vertex of said parabolic profile and the distance of the focus from the vertex of said parabolic profile is greater than 2.5;
1; and
a switch assembly having a substantially hollow heat sink housing that holds the LED light source relative to the reflector such that light generated by the LED light source is reflected by the reflector;
wherein the substantially hollow heat sink housing forms part of the electrical circuit and thermally conducts heat from the LED light source. - View Dependent Claims (16, 17, 18, 19)
- a source of energy;
Specification