Leadframe LED lighting assembly
View Patent ↗A lighting assembly and a lamp for a motor vehicle are described. A leadframe 14 out of a metal sheet material comprises a first part 14 c and a second part 14 b not directly electrically connected. An LED element 16 is fixed to the leadframe 14 . A first contact part 24 a is connected to the first leadframe part 14 c and a second contact part 24 b is connected to the second leadframe part 14 b . The LED element 16 is disposed to emit light when operated. In order to achieve a desired directed emission of light in a simple way, the leadframe 14 comprises a light direction section 20 a, 20 b including a reflective surface 30 a, 30 b arrange to reflect the light emitted from the LED element 16.
1. A lighting assembly including:
a leadframe stamped out of a metal sheet material, the leadframe comprising at least a first leadframe part and a second leadframe part having a separation between them, wherein:
the first leadframe part comprises:
a first flat portion;
a first inclined section bent at a first edge; and
a second inclined section bent at a second edge opposite the first edge, the first and the second inclined sections being longitudinally offset from each other; and
the second leadframe part comprises:
a second flat portion;
a third inclined section bent at the first edge and located opposite the second inclined section of the first leadframe part; and
a fourth inclined section bent at the second edge, the third and the fourth inclined sections being longitudinally offset from each other;
a plurality of spaced LED elements fixed to the leadframe and bridging the first leadframe part and the second leadframe part, each of the plurality of spaced LED elements comprising a packaging with at least a first contact tab and a second contact tab wherein the first contact tab comprises a contact surface arranged on and connected to the first flat portion, and wherein the second contact tab comprises a contact surface arranged on and connected to the second flat portion;
wherein the plurality of spaced LED elements forms the only electrical connection between said first leadframe part and said second leadframe part;
wherein the plurality of spaced LED elements is disposed to emit light when operated; and
wherein the first, the second, the third, and the fourth inclined sections form light direction sections including reflective surfaces arranged to reflect light emitted from the plurality of spaced LED elements.
2. The lighting assembly according to claim 1 , wherein the metal sheet material is bent and thereby configured to form the light direction sections.
3. The lighting assembly according to claim 1 , wherein the light direction sections are shaped such that at least 10% of the light emitted from each of the plurality of spaced LED elements is reflected at the reflective surfaces.
4. The lighting assembly according to claim 3 , wherein the light direction sections are formed such that more than 50% of the light emitted from each of the plurality of spaced LED elements is reflected at the reflective surfaces.
5. The lighting assembly according to claim 1 , wherein the leadframe comprises at least a first and a second reflective surface arranged on opposite sides of each of the plurality of spaced LED elements.
6. The lighting assembly according to claim 1 , wherein the reflective surfaces have a reflectivity above 50%.
7. The lighting assembly according to claim 6 , wherein the reflective surfaces are diffusely reflective.
8. The lighting assembly according to claim 1 , wherein a reflective surface of said reflective surfaces is a colored surface.
9. The lighting assembly according to claim 1 , wherein the leadframe is fixed to a carrier.
10. The lighting assembly according to claim 1 , wherein the second flat portions are arranged at least substantially in a plane, and wherein the light direction sections of the leadframe are inclined to the plane.
11. A lamp for a motor vehicle including an assembly according to claim 1 .