IP Library › Granted Patent US 10,559,724
Granted Patent B2
US 10,559,724 · App. 15/783,514 · Granted Feb 11, 2020

Light emitting device and method of manufacturing same

Inventor: Tadao Hayashi (Tokushima, JP)
Assignee: NICHIA CORPORATION
H01L33/504H01L33/486H01L33/60H01L33/505H01L33/62
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Quick Facts
Patent No.
US 10,559,724
App. No.
15/783,514
Granted
Feb 11, 2020
Kind
B2
Abstract

A light emitting device includes a light emitting element, a reflective member, and a covering member. The light emitting element includes a light extraction surface, an electrode-formed surface on a side opposite to the light extraction surface, lateral surfaces positioned between the light extraction surface and the electrode-formed surface, and a pair of electrodes on the electrode-formed surface. At least a part of the pair of the electrodes is exposed outside the light emitting device. The reflective member covers the lateral surfaces of the light emitting element while being in contact with at least a part of the light emitting element, the part of the pair of the electrodes being exposed from the reflective member. The covering member includes a lens portion on an upper surface thereof. The covering member covers the light emitting element and the reflective member while being in contact with the reflective member.

Claims (46)

1. A light emitting device comprising:

a light emitting element including a light extraction surface, an electrode-formed surface on a side opposite to the light extraction surface, lateral surfaces positioned between the light extraction surface and the electrode-formed surface, and a pair of electrodes on the electrode-formed surface;

a reflective member covering the lateral surfaces of the light emitting element, the part of the pair of the electrodes being exposed from the reflective member;

a first light-transmissive member arranged at least between lateral surfaces of the light emitting element and the reflective member, the first light-transmissive member being in contact with the lateral surfaces of the light emitting element;

a covering member including a lens portion on an upper surface thereof, the covering member covering the light emitting element and the reflective member;

a wavelength conversion member arranged over the light extraction surface of the light emitting element, the wavelength conversion member including a light-transmissive portion; and

a second light-transmissive member arranged between the wavelength conversion member and the covering member with an outer edge of the second light-transmissive member being disposed on an outer side of an outer edge of the light-transmissive portion of the wavelength conversion member, as seen in a plan view, a thickness of the second light-transmissive member as measured between the wavelength conversion member and the covering member being smaller than a thickness of the wavelength conversion member.

2. The light emitting device according to claim 1 , further comprising

a gas portion between the light extraction surface of the light emitting element and the covering member.

3. The light emitting device according to claim 2 , wherein

an outer edge of the gas portion is disposed on an inner side of an outer edge of the light emitting element, as seen in the plan view.

4. The light emitting device according to claim 1 , wherein

the wavelength conversion member further includes a light shielding portion disposed around the light-transmissive portion.

5. The light emitting device according to claim 4 , further comprising

a gas portion between the light extraction surface of the light emitting element and the covering member, wherein

an outer edge of the gas portion is disposed on an outer side of the outer edge of the light-transmissive portion, as seen in a plan view.

6. The light emitting device according to claim 1 , further comprising:

an additional light emitting element; and

an additional reflective member, wherein

the covering member further includes an additional lens portion covering the additional light emitting element and the additional reflective member, the additional lens portion being continuously and integrally formed with the lens portion.

7. The light emitting device according to claim 1 , wherein

at least a part of the pair of the electrodes is exposed outside the light emitting device.

8. The light emitting device according to claim 1 , wherein

the reflective member is in contact with at least a part of the light emitting element.

9. The light emitting device according to claim 8 , wherein

the reflective member is in contact with at least a part of the electrode-formed surface of the light emitting element.

10. The light emitting device according to claim 1 , wherein

the covering member is in contact with the reflective member.

11. The light emitting device according to claim 1 , wherein

a lower surface of the covering member is substantially flush with a lower surface of the reflective member.

12. The light emitting device according to claim 1 , wherein

the outer edge of the second light-transmissive member is disposed on an outer side of an outer edge of lateral surfaces of the light emitting element, as seen in the plan view.

13. The light emitting device according to claim 1 , wherein

the first light-transmissive member extends between the light extraction surface of the light emitting element and the wavelength conversion member.

14. The light emitting device according to claim 13 , wherein

the outer edge of the second light-transmissive member is disposed on an outer side of an outer edge of the first light-transmissive member, as seen in the plan view.

15. The light emitting device according to claim 13 , wherein

an outer edge of the first light-transmissive member is disposed on an outer side of the outer edge of the light-transmissive portion of the wavelength conversion member, as seen in the plan view.

16. The light emitting device according to claim 1 , wherein

an outer edge of the reflective member extends along a direction perpendicular to the light extraction surface of the light emitting element, in a cross-sectional view taken along a plane perpendicular to the light extraction surface of the light emitting element.

17. The light emitting device according to claim 1 , wherein

an outer edge of the reflective member extends along a direction parallel to the lateral surfaces of the light emitting element, in a cross-sectional view taken along a plane perpendicular to the light extraction surface of the light emitting element.

18. The light emitting device according to claim 13 , wherein

the second light-transmissive member is spaced apart from the additional light-transmissive member.

19. The light emitting device according to claim 1 , wherein

the second light-transmissive member is in contact with a part of the covering member, a part of the light reflective member, and a part of the wavelength conversion member.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 13, 2017
From: HAYASHI, TADAO
To: NICHIA CORPORATION
Reel/Frame 043861/0654 →
Priority Claims (1)
JP 2016-205208 · Oct 19, 2016 · national
Continuity (1)
Related Publication 20180108815A1 · Apr 19, 2018