Light-emitting device and method for manufacturing the light-emitting device

1. A light-emitting device, comprising:

an encapsulation housing and

a light engine arranged in the encapsulation housing comprising a first side and a second side opposite to the first side,

wherein the light engine is arranged in the encapsulation housing in such a manner that a cavity is formed between the light engine and the encapsulation housing,

wherein at least an exit surface of a light source arranged on the first side of the light engine is located in the cavity; and

wherein the encapsulation housing comprises a first housing portion and a second housing portion, wherein the first housing portion comprises a receiving groove for receiving the second housing portion, the second housing portion is separated from the cavity by the light engine, and the second side of the light engine is enclosed by the second housing portion.

2. The light-emitting device according to claim 1 , wherein the light-emitting device has a strip-shape, the first housing portion, the second housing portion, and the light engine extend along a longitudinal direction of the light-emitting device.

3. The light-emitting device according to claim 2 , wherein the encapsulation housing further comprises end caps at its two ends, the end caps are connected to the first housing portion and the second housing portion, in a form-fitted manner.

4. The light-emitting device according to claim 3 , wherein the end caps are connected to the first housing portion and the second housing portion in a binding manner.

5. The light-emitting device according to claim 2 , wherein the first housing portion and the second housing portion are made from flexible material.

6. The light-emitting device according to claim 5 , wherein the first housing portion is made from silica gel or PU glue and the second housing portion is made from silica gel or PU glue.

7. The light-emitting device according to claim 6 , wherein the receiving groove further comprises a side groove formed in a side wall of the first housing portion defining the receiving groove, the side groove extends in the longitudinal direction of light-emitting device.

8. The light-emitting device according to claim 1 , wherein the receiving groove and the cavity are integrally formed in the first housing portion.

9. The light-emitting device according to claim 1 , wherein the light engine comprises a flexible circuit board.

10. The light-emitting device according to claim 1 , wherein the light-emitting device is a flexible LED lighting strip.

11. The light-emitting device according to claim 1 , wherein the cavity is an air layer.

12. The light-emitting device according to claim 1 , wherein the receiving groove forms the second housing portion.

13. A method for manufacturing a light-emitting device, the method comprising:

a) providing a first housing portion within which a receiving groove and a cavity are formed in a connection manner;

b) arranging a light engine between the cavity and the receiving groove in a manner that a first side of the light engine provided with a light source faces the cavity, and a second side of the light engine faces the receiving groove, wherein at least an exit surface of the light source is located in the cavity and wherein the second side of the light engine is opposite to the first side of the light engine; and

c) filling the receiving groove with encapsulation material to form a second housing portion; enclosing the second side of the light engine with the light source by the second housing;

wherein the light engine separates the cavity from the second housing portion.

14. The method according to claim 13 , wherein the first housing portion is made from silica gel or PU glue through an extrusion process and the second housing portion is made from silica gel or PU glue through a potting process.

15. The method according to claim 14 , wherein a) further comprises forming a side groove in a side wall of the first housing portion defining the receiving groove, so as to receive an overflow of encapsulation material.

16. The method according to claim 13 , wherein c) further comprises providing end caps at two ends of the light-emitting device, wherein the end caps are connected to the first housing portion and the second housing portion in a binding manner.

17. A light-emitting device, comprising:

an encapsulation housing and

a light engine arranged in the encapsulation housing comprising a first side and a second side opposite to the first side,

wherein the light engine is arranged in the encapsulation housing in such a manner that a cavity is formed between the light engine and the encapsulation housing,

wherein at least an exit surface of a light source arranged on the first side of the light engine is located in the cavity;

wherein the encapsulation housing comprises a first housing portion and a second housing portion, wherein the first housing portion comprises a receiving groove for forming the second housing portion, the second housing portion is separated from the cavity by the light engine, and a second side of the light engine is enclosed by the second housing portion;

wherein the light-emitting device has a strip-shape, the first housing portion, the second housing portion, and the light engine extend along a longitudinal direction of the light-emitting device;

wherein the first housing portion and the second housing portion are made from flexible material;

wherein the first housing portion is made from silica gel or PU glue and the second housing portion is made from silica gel or PU glue.

18. The light emitting device according to claim 17 , wherein the receiving groove further comprises a side groove formed in a side wall of the first housing portion defining the receiving groove, the side groove extends in the longitudinal direction of light-emitting device.