LED strips with conical structure for collimated light emission
The present invention relates to an LED strip, comprising a plurality of LEDs mounted on a LED mounting surface of a flat, flexible substrate, wherein said LED mounting surface is light reflective, wherein said flexible substrate is shaped to form at least one conical structure, and wherein a subset of said plurality of LEDs is located inside at least one of the at least one conical structure.
1. An LED strip, comprising a plurality of LEDs mounted on a LED mounting surface of a flat, flexible substrate, wherein said LED mounting surface is light reflective, wherein said flexible substrate is shaped to form at least one conical structure, and a subset of said plurality of LEDs ( 3 ) is located inside at least one of the at least one conical structure,
wherein said conical structure includes a first LED strip portion and a second LED strip portion, said first and second LED strip portions being joined by a conically curved LED strip portion, such that said first and second LED strip portions intersect each other adjacent to the curved LED strip portion.
2. The LED strip according to claim 1 , comprising a plurality of conical structures.
3. The LED strip according to claim 1 , wherein the first and second LED strip portions intersect each other at an angle of substantially 90 degrees.
4. The LED strip according to claim 1 , including a plurality of conical structures, such that said LED strip follows one of a rectangular path, a polygon path and a meander path.
5. An LED strip ( 1 ), comprising a plurality of LEDs mounted on a LED mounting surface of a flat, flexible substrate, wherein said LED mounting surface is light reflective, wherein said flexible substrate is shaped to form at least one conical structure, and a subset of said plurality of LEDs is located inside at least one of the at least one conical structure,
wherein said flexible substrate comprises at least one flap portion which is bendable over said subset of LEDs to form said conical structure.
6. The LED strip according to claim 5 , wherein the conical structure includes a generally flat portion of said substrate, and a dome formed by the at least one flap.
7. The LED strip according to claim 5 , wherein said flap is formed within an outer contour of said flexible substrate and is surrounded by said flexible substrate, such that when said flap is bent over said one of said LEDs, a hole is formed in said flexible substrate.
8. The LED strip according to claim 5 , wherein said flexible substrate comprises a first flap which is bendable over said subset of LEDs to form said conical structure with an opening in a first direction, and a second flap which is bendable over said subset of LEDs to form said conical structure with an opening in a second direction.
9. The LED strip according to claim 8 , wherein said first flap and said second flap are both formed within an outer contour of said flexible substrate and are surrounded by said flexible substrate, such that when one of said first and second flaps is bent over said subset of LEDs, a hole is formed in said flexible substrate.
10. The LED strip according to claim 5 , wherein said flexible substrate comprises at least two flap portions, located on opposite sides of said subset of LEDs, such that said two flap portions are bendable in opposite directions over said subset of LEDs to form said conical structure.
11. The LED strip according to claim 1 , wherein a reflectivity of said mounting surface is at least 80%.
12. The LED strip according to claim 1 , wherein each conical structure is filled with a transparent filling material.
13. The LED strip according to claim 12 , wherein said filling material includes a scattering particles or a phosphor material.
14. A luminaire comprising the LED strip according to claim 1 .