Lens device and light source module using the same

Patent metadata

Field	Value
Publication number	US-9441797-B2
Application number	US-201414219037-A
Country	US
Kind code	B2
Filing date	Mar 19, 2014
Priority date	Sep 4, 2013
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

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.

First claim

What is claimed is:

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.

Assignees

• Lextar Electronics Corp

Inventors

• Huang Chih-Min
• Yang Kuang-Neng
• Wu Kun-Hua

Classifications

• G02B19/0066

  in the form of an LED array · CPC title

• F21V5/04

  of lens shape · CPC title

• G02B5/003

  Light absorbing elements · CPC title

• F21K9/60 Primary

  Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction · CPC title

• G02B19/0071

  adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source · CPC title