LED package structure
A light emitting diode (LED) package structure includes a circuit board, a reflective cup, a LED chip and a lens structure. The reflective cup is mounted on the circuit board, wherein the reflective cup and the circuit board collectively form a concave cup with an opening. The reflective cup has a first metal ring in the concave cup. The LED chip is mounted on the circuit board and within the concave cup. The lens structure has a second metal ring configured to join the first metal ring to cover the opening.
1. A light emitting diode (LED) package structure comprising:
a circuit board;
a reflective cup disposed on the circuit board, wherein the reflective cup and the circuit board collectively form a concave cup having an opening, the reflective cup has a first metal ring in the concave cup;
a LED chip disposed on the circuit board and within the concave cup; and
a lens structure having a second metal ring configured to join the first metal ring to cover the opening, wherein a bottom surface of the reflective cup has a third metal ring, and the circuit board has a fourth metal ring configured to join the third metal ring.
2. The LED package structure of claim 1 further comprising a metal paste or a glass paste disposed between the first and second metal rings, and disposed between the third and fourth metal rings.
3. The LED package structure of claim 1 further comprising a polymer adhesive disposed between the first and second metal rings, and disposed between the third and fourth metal rings.
4. The LED package structure of claim 1 , wherein the first metal ring and the third metal ring are connected to each other and have substantially the same diameter.
5. The LED package structure of claim 1 , wherein the circuit board has a stage on which the LED chip is mounted, a top of the stage is higher than an interface between the reflective cup and the circuit board.
6. The LED package structure of claim 1 , wherein the lens structure comprises a flat lens or a convex lens.
7. The LED package structure of claim 1 , wherein the lens structure is embedded in the concave cup.
8. The LED package structure of claim 1 , wherein the first, second, third and fourth metal rings are continuously closed metal rings.
9. The LED package structure of claim 1 , wherein the first, second, third and fourth metal rings are discontinuous metal rings.
10. The LED package structure of claim 1 , wherein an inner surface of the concave cup has a light reflective coating.
11. The LED package structure of claim 1 further comprising another pair of first and second metal rings with a different diameter configured to secure the lens structure to the reflective cup.
12. The LED package structure of claim 11 further comprising a polymer adhesive disposed between the another pair of first and second metal rings.
13. The LED package structure of claim 1 further comprising another pair of third and fourth metal rings with a different diameter configured to secure the reflective cup to the circuit board.
14. The LED package structure of claim 13 further comprising a polymer adhesive disposed between the another pair of third and fourth metal rings.