Light emitting device package and lighting system using the same

• US 8,916,887 B2
• Filed: 02/08/2012
• Issued: 12/23/2014
• Est. Priority Date: 07/29/2011
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kim, Tae Jin
• Primary Examiner(s): KIM, SU C
• Application Number:
  US13/368,660
• Publication Number:
  US 20130026500A1
• Time in Patent Office: 1,049 Days
• Field of Search: 257/88, 257/98, 257/E33.061, 257/E33.069, 438/34, 438/35, 313/504
• US Class Current: 257/88
• CPC Class Codes: C09K 11/0883 Arsenides; Nitrides; Phosphides
• CPC Class Codes: C09K 11/7738 with alkaline earth metals
• CPC Class Codes: C09K 11/7739 with halogens
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/49113 the connectors connecting different bonding areas on the semiconductor or solid-state body to a common bonding area outside the body, e.g. converging wires
• 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 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/07 Polyamine or polyimide
• CPC Class Codes: H01L 2924/1301 Thyristor
• CPC Class Codes: H01L 33/50 Wavelength conversion elements

Abstract

A light emitting device package of the embodiment includes a body including cavities; first and second lead electrodes disposed in the cavity of the body; a light emitting device disposed in the cavities, electrically connected to at least one of the first and second lead electrodes and emitting a first main peak wavelength in the range of 410˜460 nm; and a first resin layer having first phosphor on the light emitting device, wherein the first phosphor of the first resin layer emits light of a second main peak wavelength in the range of 461 nm˜480 nm by exciting some light having the first main peak wavelength, and the first and second main peak wavelengths have the wavelength different from each other and contain the light having the same color.

Claims

1. A light emitting device package, comprising:

a body including a cavity;

first and second lead electrodes disposed in the cavity of the body;

a light emitting device disposed in the cavity, electrically connected to at least one of the first and second lead electrodes and emitting a first main peak wavelength in the range of 410˜

460 nm;

a first resin layer having first phosphor on the light emitting device;

a second phosphor emitting light of a third main peak in the cavity; and

a second resin layer on the first resin layer, and the first phosphor in the second resin layer,

wherein the first phosphor of the first resin layer emits light of a second main peak wavelength in the range of 461 nm˜

480 nm by exciting some light having the first main peak wavelength, and the first and second main peak wavelengths have the wavelength different from each other and contain light having a same color,

wherein the light emitting device is a blue LED chip,

wherein the first phosphor is a blue phosphor,

wherein the first phosphor emits a blue light having a wavelength difference of 5 nm to 69 nm from the first main peak wavelength, and

wherein the second phosphor emits the light of the third main peak longer than the second main peak.

2. The light emitting device package according to claim 1, wherein the light emitting device emits the light of the first main peak wavelength in the range of 420 nm±

5 nm, and the first phosphor emits the light of the second main peak wavelength in the range of 470 nm±

5 nm.

3. The light emitting device package according to claim 1, wherein the second phosphor is disposed in the second resin layer, and

wherein the second phosphor include at least two of red, green, and yellow phosphors.

4. The light emitting device package according to claim 3, wherein the light emitted from the light emitting device, the first and second phosphors are mixed color into white light.

5. The light emitting device package according to claim 3, further comprising a transparent resin layer separated from the first and second phosphors under the first resin layer.

6. The light emitting device package according to claim 1, wherein the first phosphor include at least one selected from the group consisting of BaMgA1₁₀O₁₇:

Eu(Mn), Sr₅Ba₃MgSi₂O₈;

Eu²⁺, Sr₂P₂O₇;

Eu²⁺, SrSiAl₂O₃N₂;

Eu²⁺, (Ba<sub>1−

x</sub>Sr_x)SiO₄;

Eu²⁺(0<

x<

1), (Sr,Ca,Ba,Mg)₁₀(PO₄)₆C₁₂;

Eu²⁺, and CaMgSi₂O₆;

Eu²⁺.

7. The light emitting device package according to claim 1, wherein a diameter of the first phosphor is formed in the range of 1 μ

m to 10 μ

m.

8. The light emitting device package according to claim 1, further comprising a transparent third resin layer separated from the first phosphor on the second resin layer.

9. The light emitting device package according to claim 8, further comprising a third phosphor in the third resin layer, wherein the third phosphor emits blue light having a wavelength difference of 5 nm to 69 nm from the first main peak wavelength.

18. The light emitting device package according to claim 3, wherein a content of the first phosphor in the first resin layer has the content greater than a content of the second phosphor in the second resin layer.

10. A light emitting device package, comprising:

a body including a first cavity;

first and second lead electrodes disposed in the first cavity;

a light emitting device disposed in the first cavity, electrically connected to at least one of the first and second lead electrodes and emitting a first blue wavelength;

a first resin layer disposed on the light emitting device and including first phosphor emitting a second blue wavelength longer than the first blue wavelength;

a second phosphor emitting light of wavelength longer than the second blue wavelength in the first cavity; and

a second cavity of the first lead electrode recessed from a bottom surface of the first cavity, and a third cavity of the second lead electrode recessed from a bottom surface of the first cavity,

wherein the light emitting device includes a first light emitting device disposed in the second cavity and a second light emitting device disposed in the third cavity, and the first light emitting device and the second light emitting device emit main peak wavelengths different from each other,

wherein the first and second light emitting devices are the blue LED chip,

wherein the first phosphor of the first resin layer emits a second blue wavelength in the range of 461 nm˜

480 nm,

wherein the light emitting device is a blue LED chip,

wherein the first phosphor is a blue phosphor, and

wherein the first phosphor emits the second blue wavelength having a wavelength difference of 5 nm to 69 nm from the first blue wavelength.

11. The light emitting device package according to claim 10, wherein the wavelength difference between the first and second blue wavelength is about 45˜

55 nm.

12. The light emitting device package according to claim 10, wherein the first light emitting device emits the main peak wavelength of 410 nm˜

430 nm, and the second light emitting device emits the light of the wavelength longer than the first light emitting device.

13. The light emitting device package according to claim 12, wherein the first resin layer is disposed in the second cavity and third cavity, the first phosphor of the first resin layer disposed in the second cavity emit the main peak wavelength in the range of 465 nm˜

475 nm, and the first phosphor of the first resin layer disposed in the third cavity emit the main peak wavelength in the range of 469 nm˜

480 nm.

14. The light emitting device package according to claim 13, further comprising a second resin layer including second phosphor on the first resin layer,

wherein the second phosphor emit the light of the wavelength longer than the second blue wavelength, and

wherein the second phosphor includes a yellow phosphor and a red phosphor.

15. The light emitting device package according to claim 14, wherein the lights emitted from the light emitting device, the first and second phosphor are mixed to be white light.

16. The light emitting device package according to claim 13, further comprising a third resin layer including the first phosphor on the second resin layer,

wherein the content of the first phosphor of the third resin layer is different from the content of the first phosphor of the first resin layer.

17. A lighting system, comprising:

a substrate; and

a plurality of light emitting device package disposed on the substrate,

wherein the light emitting device package includes;

a body including cavities;

first and second lead electrodes disposed in the cavity of the body;

a light emitting device disposed in the cavity, electrically connected to at least one of the first and second lead electrodes and emitting a first main peak wavelength in the range of 410 ˜

460 nm;

a first resin layer having first phosphor on the light emitting device;

a second phosphor emitting light of a third main peak in the cavity; and

a second resin layer on the first resin layer, and the first phosphor in the second resin layer,

wherein the first phosphor of the first resin layer emits light of a second main peak wavelength in the range of 461 nm˜

480 nm by exciting some light having the first main peak wavelength, and the first and second main peak wavelengths have the wavelength different from each other and contain light having a same color,

wherein the light emitting device is a blue LED chip,

wherein the first phosphor is a blue phosphor,

wherein the first phosphor emits a blue light having a wavelength difference of 5 nm to 69 nm from the first main peak wavelength, and

wherein the second phosphor emits the light of the third main peak longer than the second main peak.