Lens device and light source module using the same
View Patent ↗A lens device and a light source module using the same are provided. The lens device comprises a lens and a patterned light shielding layer. The lens has a middle light emitting surface and a periphery light emitting surface surrounding the middle light emitting surface. The patterned light shielding layer is formed on the periphery light emitting surface of the lens.
1. A lens device, comprising:
a lens having a middle light emitting surface and a periphery light emitting surface, wherein the periphery light emitting surface surrounds the middle light emitting surface; and
a patterned light shielding layer formed on the periphery light emitting surface of the lens and separated from a boundary of the periphery light emitting surface;
wherein the patterned light shielding layer has an annular shape and has a plurality of hollowed spots arranged as at least an annular pattern.
2. The lens device according to claim 1 , wherein the patterned light shielding layer is an ink layer.
3. The lens device according to claim 2 , wherein a color of the ink layer is white.
4. The lens device according to claim 3 , wherein the reflectivity of the white ink layer is higher than 80%.
5. The lens device according to claim 1 , wherein the patterned light shielding layer comprises a plurality of light shielding spots arranged as at least a row of an annular pattern.
6. The lens device according to claim 5 , wherein a shape of each light shielding spot is a circular, elliptical or polygonal shape.
7. The lens device according to claim 5 , wherein the light shielding spots are mutually separated by an interval.
8. The lens device according to claim 5 , wherein the light shielding spots comprise a plurality of first light shielding spots and a plurality of second light shielding spots, the first light shielding spots are arranged as a first annular pattern on the lens, the second light shielding spots are arranged as a second annular pattern on the lens, and the second annular pattern surrounds the first annular pattern.
9. The lens device according to claim 8 , wherein an area of each second light shielding spot is larger than that of each first light shielding spot.
10. The lens device according to claim 1 , wherein a shape of each hollowed spot is a circular, elliptical or polygonal shape.
11. The lens device according to claim 1 , wherein the hollowed spots are mutually separated by an interval.
12. The lens device according to claim 1 , wherein the hollowed spots comprises a plurality of first hollowed spots and a plurality of second hollowed spots, the first hollowed spots are arranged as a third annular pattern on the lens, the second hollowed spots are arranged as a fourth annular pattern on the lens, and the fourth annular pattern surrounds the third annular pattern.
13. The lens device according to claim 12 , wherein an area of each second hollowed spot is larger than that of each first hollowed spot.
14. A light source module, comprising:
a light emitting diode (LED); and
a lens device according to claim 1 disposed on an optical path of the LED.
15. The light source module according to claim 14 , further comprising at least an optical film disposed on the optical path of the lens device.
16. A light source module, comprising:
a LED; and
a lens device according to claim 2 disposed on an optical path of the LED.
17. A light source module, comprising:
a LED; and
a lens device according to claim 3 disposed on an optical path of the LED.
18. A light source module, comprising:
a LED; and
a lens device according to claim 4 disposed on an optical path of the LED.
19. A light source module, comprising:
a LED; and
a lens device according to claim 5 disposed on an optical path of the LED.