IP Library › Granted Patent US 12669233
Granted Patent B2
US 12669233 · App. 18/991,214 · Granted Jun 30, 2026

Light-emitting device including light-transmissive member disposed above wavelength conversion member via air layer

Inventors: Yusaku Funakura (Tokushima, JP); Masato Aihara (Komatsushima, JP); Toru Taruki (Tokushima, JP)
Assignee: NICHIA CORPORATION
F21V7/0025F21V7/0066F21V7/09F21V9/30H10H20/85H10H20/8504H10H20/8506H10H20/856
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Quick Facts
Patent No.
US 12669233
App. No.
18/991,214
Granted
Jun 30, 2026
Kind
B2
Abstract

A light-emitting device includes first and second portions. The first portion includes a light-emitting element, a wavelength conversion member, and a first reflective member covering lateral surfaces of the light-emitting element and the wavelength conversion member. The second portion includes a light-transmissive member disposed above the wavelength conversion member via an air layer, and a second reflective member disposed around the light-transmissive member. An upper surface of the first reflective member has a first upper surface disposed around the wavelength conversion member and a second upper surface disposed outwardly of the first upper surface. A lower surface of the second reflective member has a first lower surface disposed around the light-transmissive member and a second lower surface disposed outwardly of the first lower surface. The air layer extends between the first upper surface of the first reflective member and the first lower surface of the second reflective member.

Claims (43)

1 . A light-emitting device comprising:

a first portion including

a light-emitting element,

a wavelength conversion member disposed on an upper surface of the light-emitting element, and

a first reflective member covering a lateral surface of the light-emitting element and a lateral surface of the wavelength conversion member; and

a second portion including

a light-transmissive member disposed above the wavelength conversion member via an air layer, and

a second reflective member disposed around the light-transmissive member in a plan view, wherein

an upper surface of the first reflective member has a first upper surface disposed around the wavelength conversion member and a second upper surface disposed outwardly of the first upper surface in the plan view,

a lower surface of the second reflective member has a first lower surface disposed around the light-transmissive member and a second lower surface disposed outwardly of the first lower surface in the plan view, and

the air layer extends in a region between the first upper surface of the first reflective member and the first lower surface of the second reflective member.

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

a third portion including a third reflective member between the first portion and the second portion, wherein

the third portion is disposed between the second upper surface of the first reflective member and the second lower surface of the second reflective member, and

the air layer is in contact with the third reflective member.

3 . The light-emitting device according to claim 1 , wherein

the second upper surface is positioned higher than the first upper surface in the first reflective member.

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

the second upper surface is positioned lower than the first upper surface in the first reflective member.

5 . The light-emitting device according to claim 1 , wherein

the second lower surface is positioned lower than the first lower surface in the second reflective member.

6 . The light-emitting device according to claim 1 , wherein

the second lower surface is positioned higher than the first lower surface in the second reflective member.

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

the second upper surface is disposed along an entire periphery on an outside of the first upper surface.

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

the second lower surface is disposed along an entire periphery on an outside of the first lower surface.

9 . The light-emitting device according to claim 1 , wherein

the second upper surface is intermittently disposed along a periphery on an outside of the first upper surface.

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

the second lower surface is intermittently disposed along a periphery on an outside of the first lower surface.

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

the second upper surface is positioned lower than the first upper surface in the first reflective member, and

the second lower surface is positioned lower than the first lower surface in the second reflective member.

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

the second upper surface is positioned higher than the first upper surface in the first reflective member, and

the second lower surface is positioned higher than the first lower surface in the second reflective member.

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

the second upper surface and the first upper surface are on the same plane in the first reflective member, and

the second lower surface is positioned lower than the first lower surface in the second reflective member.

14 . The light-emitting device according to claim 1 , wherein

the second upper surface is positioned higher than the first upper surface in the first reflective member, and

the second lower surface and the first lower surface are on the same plane in the second reflective member.