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US 7,401,960 B2Granted
Light emitting diode headlamp
AssigneeTruck-Life Co., Inc.
InventorsGregory R. Pond, Philip C. Roller, Chris A. Suckow, Ronald D. Madison, Timothy DiPenti, Todd Kolstee
Life of this patent
Estimating the term…
Abstract
A light emitting diode headlamp capable of low beam and high beam functions. The light emitting diode headlamp assembly comprises high-flux light emitting diodes, a reflector subassembly, a first and second light transmissive member, and a heat sink.
Claims23
A headlamp, comprising:
- a plurality of light emitting diodes, each diode being adapted to produce a plurality of light rays;
- a housing formed of a material for transferring heat away from said plurality of light emitting diodes;
- an outer light transmissive member with an inner and outer face, said outer light transmissive member adapted to engage with said housing to define a three-dimensional space therebetween;
- at least one inner light transmissive member adjacent to said outer light transmissive member, said at least one inner light transmissive member being adapted to direct a portion of said light rays produced by one of said plurality of light emitting diodes towards said outer light transmissive member;
- at least one alignment mechanism, wherein said at least one inner light transmissive member is fixedly secured to said at least one alignment mechanism such that said at least one inner light transmissive member is aligned generally parallel to said outer light transmissive member and in front of said array of light emitting diodes;
- a unitary reflector subassembly positioned within said space, said reflector subassembly including an array of parabolic reflector units, each reflector unit having a base portion with an opening formed therein for accommodating one diode of said plurality of light emitting diodes, each of said unitary reflector units being adapted to direct a portion of said light rays directly through said outer light transmissive member;
- and
- a driver circuit with a current regulation mechanism.
5 more elements
A headlamp assembly comprising:
- at least two headlamps comprising a plurality of high-flux light emitting diodes as a light source, each light emitting diode being adapted to produce a plurality of light rays;
- each of said at least two headlamps comprising:
- a housing;
- an outer light transmissive member hermetically sealed with said housing, thereby defining a three-dimensional space;
- a plurality of reflector units positioned within said space and operatively arranged to correspond to said plurality of light emitting diodes, each reflector unit of said plurality of reflector units being adapted to direct a portion of said light rays emitted from one light emitting diode of said plurality of light emitting diodes directly through said outer light transmissive member;
- at least one inner light transmissive member adjacent to said outer light transmissive member, said at least one inner light transmissive member being adapted to collect a portion of said light rays emitted by one light emitting diode of said plurality of light emitting diodes;
- at least one alignment mechanism such that each of said at least one inner light transmission member corresponds to one of said plurality of high-flux light emitting diodes;
- a heat dissipating mechanism;
- and
- a driver circuit with a current regulation mechanism, said driver circuit operatively arranged to drive said plurality of light emitting diodes.
7 more elements
Dependencies are inferred from the claim text.