All-LED visible light and IR light headlamp
View Patent ↗A headlamp for a vehicle (air, land or sea) providing a planar array of infrared (IR) light-emitting diodes (LEDs) and visible light LEDs, and arranged and mounted within a housing so as to provide for cooling of the LEDs without forced convection, by conducting heat from the LEDs to protruding cooling fins. A switch system is also provided, for enabling either the visible light or the infrared light, and for selecting a high-beam or low-beam pattern. The beam pattern is provided in some embodiments so as to meet US Federal Motor Vehicle standards.
1. A headlamp system for a vehicle, comprising:
a housing ( 22 ) including a base component ( 22 b ) having a plurality of protruding cooling fins ( 22 f ), and a top component ( 22 a ), the top component affixed to and covering the base component ( 22 b );
a planar array ( 28 ) of LED-lens units ( 40 41 42 44 ) sandwiched between the base component ( 22 b ) and the top component ( 22 a ), the LED-lens units ( 40 41 42 44 ) disposed in a desired arrangement, at least one of the LED-lens units ( 40 ) providing high beam white light, at least one of the LED-lens units ( 42 ) providing high beam infrared light, at least one of the LED-lens units ( 41 ) providing low beam white light, and at least one of the remaining LED-lens units ( 44 ) providing low beam infrared light; and
one or more switches electrically configured and connected for controlling operation of the LED-lens units ( 40 41 42 44 );
wherein the cooling fins ( 22 f ) protruding from the housing ( 22 ) are connected by a thermally conducting path to the LED-lens units ( 40 41 42 44 ) and the cooling fins and conducting path are such as to provide sufficient heat removal from the LED-lens units by only conduction and radiation.
2. The headlamp of claim 1 , wherein the one or more switches comprise headlamp switches electrically configured and connected for controlling on and off operation of the LED-lens units ( 40 41 42 44 ), a high-beam switch for selecting a high beam or a low beam, and an infrared switch for switching between white light and infrared light.
3. The headlamp of claim 1 , further comprising an aluminum substrate ( 12 ) upon which the planar array of LED-lens units are affixed, and the aluminum substrate ( 12 ) forms part of the thermally conducting path.
4. The headlamp of claim 1 , wherein the LED-lens units ( 40 41 42 44 ) comprise one or more lenses so as to provide the high beam and low beam according to a motor vehicle specification.
5. The headlamp of claim 1 , wherein both the housing ( 22 ) and the cooling fins ( 22 f ) are aluminum and form part of the thermally conducting path.
6. The headlamp of claim 1 , wherein the desired arrangement of LED-lens units ( 40 41 42 44 ) is a pattern of alternating rows of high and low beam IR LED-lens units and high and low beam white light LED-lens units.
7. The headlamp of claim 1 , wherein the LED-lens units ( 40 41 42 44 ) are LED-substrate units and the housing ( 22 ) is an aluminum housing, and the LED-substrate units and the housing ( 22 ) form part of the thermally conducting path.
8. The headlamp of claim 1 , wherein at least one of the LED-lens units ( 40 41 42 44 ) comprises a lens-less LED and a lens attached thereto forming an assembly, and the assembly is mounted to an LED-substrate ( 12 ).
9. The headlamp of claim 1 , wherein at least one of the LED-lens units ( 40 41 42 44 ) comprises an LED ( 14 ) having a primary lens integral therewith, mounted to an LED substrate ( 12 ), and also a secondary lens ( 16 ), wherein the secondary lens ( 16 ) works in conjunction with the primary lens to create a desired beam pattern.
10. The headlamp of claim 1 , wherein at least one of the LED-lens units ( 40 41 42 44 ) comprises a plurality of dies ( 40 d ) thermally bonded to an LED-substrate ( 12 ), and a single lens ( 40 c 41 c 42 c 44 c 46 d ) in spaced relation to the plurality of dies ( 40 d ) for forming a beam from light emitted by the plurality of dies.
11. The headlamp of claim 1 , further comprising at least one fill light ( 46 a 46 b 46 c ), the at least one fill light comprising a plurality of dies ( 40 d ) thermally bonded to an aluminum substrate ( 12 ), and a single lens ( 46 d ) in spaced relation to the plurality of dies ( 40 d ), the light emitted by the plurality of dies ( 40 d ) serving as a single LED light source, for forming a beam pattern to augment and refine the beam pattern created by the operational LED-lens units ( 40 41 42 44 ) so as to meet the requirements of a motor vehicle specification.