Light-emitting device package and lighting apparatus including the package

• US 9,837,588 B2
• Filed: 01/28/2016
• Issued: 12/05/2017
• Est. Priority Date: 02/06/2015
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Joo, Yang Hyun, Park, Sang Jun
• Primary Examiner(s): Roman, Angel
• Assistant Examiner(s): QUINTO, KEVIN V
• Application Number:
  US15/008,659
• Publication Number:
  US 20160233397A1
• Time in Patent Office: 677 Days
• Field of Search: None
• CPC Class Codes: H01L 2224/49107 on the semiconductor or solid-state body
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

A light-emitting device package and a lighting apparatus including the light-emitting device package are provided. The light-emitting device package may include a body, a light-emitting device provided on the body, a phosphor layer provided on the body and the light-emitting device, and a lens provided on the phosphor layer that refracts and reflects light discharged from the light-emitting device and having a lens body. The lens body may include a side portion, a recess having a curved surface and provided at a center of an upper surface of the lens body, and an edge portion having a convex rounded shape and provided between the recess and the side portion.

Claims

1. A lighting apparatus, comprising:

a light-emitting device package; and

an optical member provided above the light-emitting device package,

wherein the light-emitting device package comprises;

a body;

a light-emitting device provided on the body;

a phosphor layer provided on the body and the light-emitting device; and

a lens provided on the phosphor layer that refracts and reflects light discharged from the light-emitting device and having a lens body, wherein the lens body includes;

a side portion;

a recess having a curved surface and provided at a center of an upper surface of the lens body; and

an edge portion having a convex rounded shape and provided between the recess and the side portion,

wherein the lens has a same planar area as a planar area of the phosphor layer in a direction perpendicular to an optical axis, and

wherein a full width at half maximum of the light-emitting device package measured at the optical member is within a range from 63 mm to 73 mm.

2. The apparatus according to claim 1, wherein the lens further includes a protrusion configured to protrude from the side portion in a direction perpendicular to an optical axis.

3. The apparatus according to claim 1, wherein the recess is symmetrical about an optical axis.

4. The apparatus according to claim 1, wherein the lens is thinnest at an optical axis.

5. The apparatus according to claim 1, wherein a vertical distance between a lowermost apex of the recess and a virtual reference surface that extends from an outermost upper surface of the body is within a range from 0.37 mm to 0.57 mm.

6. The apparatus according to claim 1, wherein the recess has a depth within a range from 0.44 mm to 0.74 mm.

7. The apparatus according to claim 1, wherein the recess is provided in a region defined by points spaced apart from an optical axis by a distance L/4, where L is a width of the lens.

8. The apparatus according to claim 1, wherein the recess has a radius of curvature within a range from 1.0 mm to 5.5 mm.

9. The apparatus according to claim 1, wherein a height from a virtual reference surface that extends from an outermost upper surface of the body to an uppermost surface of the lens is within a range from 0.81 mm to 1.11 mm.

10. The apparatus according to claim 1, wherein the edge portion has a radius of curvature within a range from 0.1 mm to 0.5 mm.

11. The apparatus according to claim 1, wherein the side portion is inclined by 10°

in relation to a vertical line parallel to an optical axis.

12. The apparatus according to claim 1, further including first and second lead frames spaced apart from each other in a width direction of the lens,

wherein the light-emitting device includes a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer, and

wherein the first and second conductive semiconductor layers are electrically connected to the first and second lead frames, respectively.

13. The apparatus according to claim 1, wherein a distance between the optical member and the lens is 40 mm.

14. The apparatus according to claim 1, wherein color deviation between a center of the light-emitting device package and a point spaced apart from the center by 2.7 mm in a direction perpendicular to an optical axis, measured at the optical member, is within a range from 4% to 5%.

15. The apparatus according to claim 1, wherein the lens body further includes a top portion provided between the edge portion and the recess.

16. The apparatus according to claim 15, wherein a height from a virtual reference surface that extends from an outermost upper surface of the body to the top portion is within a range from 0.81 mm to 1.11 mm.

17. The apparatus according to claim 15, wherein the top portion of the lens is spaced apart from an optical axis by L/4, where L is a width of the lens.