LED lamp unit, in particular for automotive lamps
View Patent ↗An automotive LED lamp unit includes a plate-like mounting member, LED light sources arranged on two opposite sides of the plate-like mounting member, and a heat sink. The heat sink includes cooling fins and a tapered portion facing the LED light sources and being connected to one end of the plate-like mounting member.
1. An automotive LED lamp unit, comprising:
a plate-like mounting member comprising two opposing sides and side edges between the two opposing sides;
LED light sources arranged on the two opposing sides of the plate-like mounting member;
a heat sink, comprising:
a tapered end facing the LED light sources and being connected to one of the side edges at one end of the plate-like mounting member to achieve the emission of the LED light in a large solid angle;
a non-tapered end, wherein a thickness of the non-tapered end is more than twice the thickness of the plate-like mounting member; and
cooling fins;
an electrical connector base, wherein the heat sink is arranged between the electrical connector base and the plate-like mounting member.
2. The LED lamp unit of claim 1 , wherein the cooling fins define gaps extending between the tapered end and a backside of the heat sink away from the LED light sources.
3. The LED lamp unit of claim 2 , further comprising a fan arranged at the backside of the heat sink.
4. The LED lamp unit of claim 3 , wherein the plate-like mounting member, the LED light sources, the heat sink, and the fan together comprise a maximum diameter and a maximum length of a standard automotive bulb.
5. The LED lamp unit of claim 4 , wherein the maximum diameter comprises 15 mm and the maximum length comprises 50 mm.
6. The LED lamp unit of claim 1 , wherein the plate-like mounting member is formed integrally with the heat sink.
7. The LED lamp unit of claim 1 , wherein the plate-like mounting member is mechanically connected to the heat sink.
8. An automotive headlamp comprising the LED lamp unit of claim 1 and a reflector that at least partly surrounds the LED lamp unit.
9. An automotive lamp, comprising:
an LED lamp unit, comprising:
a plate-like mounting member comprising two opposing sides and side edges between the two opposing sides;
LED light sources arranged on the two opposing sides of the plate-like mounting member;
a wedge-shaped heat sink, comprising:
a tapered end facing the LED light sources and being connected to one longitudinal end of the plate-like mounting member to achieve an emission of LED light in a large solid angle;
a non-tapered end, wherein a thickness of the non-tapered end is more than twice the thickness of the plate-like mounting member; and
cooling fins;
an electrical connector base, wherein the heat sink is arranged between the electrical connector base and the plate-like mounting member; and
a reflector that at least partly surrounds the LED lamp unit, wherein the plate-like mounting member, the LED light sources, and the heat sink are completely arranged inside a volume surrounded by the reflector.
10. The automotive headlamp of claim 9 , wherein the automotive LED lamp unit further comprises a fan arranged about a backside of the heat sink, the backside being located away from the LED light sources.
11. The automotive headlamp of claim 10 , wherein the fan is completely arranged inside the volume surrounded by the reflector.
12. The automotive headlamp of claim 10 , wherein the cooling fins define gaps extending between the tapered end and the backside of the heat sink.