Lens and light emitting apparatus having the same

• US 8,616,729 B2
• Filed: 12/19/2012
• Issued: 12/31/2013
• Est. Priority Date: 11/19/2009
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Bak, Gyu Hyeong
• Primary Examiner(s): Ton, Anabel
• Application Number:
  US13/719,518
• Publication Number:
  US 20130107544A1
• Time in Patent Office: 377 Days
• Field of Search: 362/257, 362/311.02, 362/311.01, 362/249.02, 362/308, 362/296.05, 362/311.06
• US Class Current: 362/257
• CPC Class Codes: F21V 17/101 permanently, e.g. welding, gluing or riveting
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0066 in the form of an LED array
• CPC Class Codes: G02B 19/0071 adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

Provided is a lens. The lens includes a lens body including a convex top surface having a first recessed part at a central portion thereof and a flat surface at a circumference thereof and a flat bottom surface having a second recessed part at a central portion thereof; and a plurality of lens supports on the bottom surface of the lens body, wherein a ratio of a maximum depth (a) of the first recessed part, from the top surface of the lens body to a bottom surface of the first recessed part, to a maximum thickness (h) of the lens body, from the top surface of the lens body to the bottom surface of the lens body, ranges from 0.06 to 0.1.

Claims

1. A lens comprising:

a lens body having a convex top surface comprising a first recessed part at a central portion thereof and a flat surface at a circumference thereof and a flat bottom surface comprising a second recessed part at a central portion thereof; and

a plurality of lens supports on the bottom surface of the lens body,

wherein a ratio of a maximum depth (a) of the first recessed part, from the top surface of the lens body to a bottom surface of the first recessed part, to a maximum thickness (h) of the lens body, from the top surface of the lens body to the bottom surface of the lens body, ranges from about 0.06 to about 0.1.

2. The lens according to claim 1, wherein a ratio of a maximum depth (b) of the second recessed part, from a top surface of the second recessed part to the bottom surface of the lens body, to the maximum thickness (h) of the lens body ranges, from the top surface of the lens body to the bottom surface of the lens body, from about 0.5 to about 0.75.

3. The lens according to claim 1, wherein a ratio of a maximum depth (b) of the second recessed part, from a top surface of the second recessed part to the bottom surface of the lens body, to the maximum depth (a) of the first recessed part, from the top surface of the lens body to a bottom surface of the first recessed part, ranges from about 6.25 to about 10.

4. The lens according to claim 1, wherein a ratio of a maximum width (d) of the second recessed part, the longest distance between two points at a bottom surface of the second recessed part, to a maximum width (j) of the lens body, the longest distance between two points at the bottom surface of the lens body, ranges from about 0.14 to about 0.25.

5. The lens according to claim 1, wherein the maximum thickness (h) of the lens body ranges from about 4 mm to about 5 mm, and wherein the maximum depth (a) of the first recessed part ranges from about 0.3 mm to about 0.4 mm.

6. The lens according to claim 2, wherein the maximum thickness (h) of the lens body ranges from about 4 mm to about 5 mm, and wherein the maximum depth (b) of the second recessed part ranges from about 2.5 mm to about 3 mm.

7. The lens according to claim 3, wherein the maximum depth (a) of the first recessed part ranges from about 0.3 mm to about 0.4 mm, and wherein the maximum depth (b) of the second recessed part ranges from about 2.5 mm to about 3 mm.

8. The lens according to claim 1, wherein the first recessed part and the second recessed part vertically overlap each other.

9. The lens according to claim 1, wherein the plurality of lens supports comprises at least three or more lens supports.

10. The lens according to claim 1, wherein the first recessed part is formed of downwardly concave shape and the second recessed part is formed of upwardly concave shape.

11. A lens comprising:

a lens body having a convex top surface comprising a first recessed part at a central portion thereof and a flat surface at a circumference thereof and a flat bottom surface comprising a second recessed part at a central portion thereof; and

a plurality of lens supports on the bottom surface of the lens body,

wherein a ratio of a maximum depth (b) of the second recessed part, from a top surface of the second recessed part to the bottom surface of the lens body, to the maximum thickness (h) of the lens body ranges, from the top surface of the lens body to the bottom surface of the lens body, from about 0.5 to about 0.75.

12. The lens according to claim 11, wherein a ratio of the maximum depth (b) of the second recessed part, from a top surface of the second recessed part to the bottom surface of the lens body, to a maximum depth (a) of the first recessed part, from the top surface of the lens body to a bottom surface of the first recessed part, ranges from about 6.25 to about 10.

13. The lens according to claim 12, wherein the ratio of a maximum depth (a) of the first recessed part, from the top surface of the lens body to a bottom surface of the first recessed part, to the maximum thickness (h) of the lens body, from the top surface of the lens body to the bottom surface of the lens body, ranges from about 0.06 to about 0.1.

14. The lens according to claim 11, wherein a ratio of a maximum width (d) of the second recessed part, the longest distance between two points at a bottom surface of the second recessed part, to a maximum width (j) of the lens body, the longest distance between two points at the bottom surface of the lens body, ranges from about 0.14 to about 0.25.

15. The lens according to claim 11, wherein the maximum thickness (h) of the lens body ranges from about 4 mm to about 5 mm, and wherein the maximum depth (b) of the second recessed part ranges from about 2.5 mm to about 3 mm.

16. The lens according to claim 12, wherein the maximum depth (a) of the first recessed part ranges from about 0.3 mm to about 0.4 mm, and wherein the maximum depth (b) of the second recessed part ranges from about 2.5 mm to about 3 mm.

17. The lens according to claim 13, wherein the maximum thickness (h) of the lens body ranges from about 4 mm to about 5 mm, and wherein the maximum depth (a) of the first recessed part ranges from about 0.3 mm to about 0.4 mm.

18. The lens according to claim 11, wherein the plurality of lens supports comprises at least three or more lens supports.

19. A lens comprising:

a lens body having a convex top surface comprising a first recessed part at a central portion thereof and a flat surface at a circumference thereof and a flat bottom surface comprising a second recessed part at a central portion thereof; and

a plurality of lens supports on the bottom surface of the lens body,

wherein the first recessed part is formed of downwardly concave shape and the second recessed part is formed of upwardly concave shape,

wherein a ratio of a maximum depth (a) of the first recessed part, from the top surface of the lens body to a bottom surface of the first recessed part, to a maximum thickness (h) of the lens body, from the top surface of the lens body to the bottom surface of the lens body, ranges from about 0.06 to about 0.1,

wherein a ratio of a maximum depth (b) of the second recessed part, from a top surface of the second recessed part to the bottom surface of the lens body, to the maximum thickness (h) of the lens body ranges, from the top surface of the lens body to the bottom surface of the lens body, from about 0.5 to about 0.75,

wherein a ratio of the maximum depth (b) of the second recessed part, from a top surface of the second recessed part to the bottom surface of the lens body, to the maximum depth (a) of the first recessed part, from the top surface of the lens body to a bottom surface of the first recessed part, ranges from about 6.25 to about 10, and

wherein a ratio of a maximum width (d) of the second recessed part, the longest distance between two points at a bottom surface of the second recessed part, to a maximum width (j) of the lens body, the longest distance between two points at the bottom surface of the lens body, ranges from about 0.14 to about 0.25.

20. The lens according to claim 19, wherein the maximum thickness (h) of the lens body ranges from about 4 mm to about 5 mm, wherein the maximum depth (a) of the first recessed part ranges from about 0.3 mm to about 0.4 mm, wherein the maximum depth (b) of the second recessed part ranges from about 2.5 mm to about 3 mm, and wherein the maximum width (j) of the lens body ranges from about 13 mm to about 19 mm.