US 12,424,817 B2Granted

Light-emitting device

AssigneeNichia Corporation

InventorsKazuya Eto, Soichiro Miura, Takuya Hashimoto, Masatoshi Nakagaki

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Abstract

A light-emitting device includes first and second light-emitting elements, upper submounts, and a lower submount. The upper submounts include a first submount having a first upper surface and a first lateral surface located on a same side as an emission end surface of the first light-emitting element, and a second submount having a second upper surface and a second lateral surface located on a same side as an emission end surface of the second light-emitting element. In a top plan view, the first lateral surface is located forward relative to the second lateral surface, and the emission end surface of the first light-emitting element is located forward relative to the emission end surface of the second light-emitting element. At least a portion of the first lateral surface is protruded forward relative to an edge along which an upper surface and a lateral surface of the lower submount meet.

Claims18

Dependent claims

A light-emitting device comprising:

a first light-emitting element having a first emission end surface including one or more first light-emitting points each configured to emit a first light;
a second light-emitting element having a second emission end surface including one or more second light-emitting points each configured to emit a second light;
a plurality of upper submounts;
and
a lower submount,
wherein
the plurality of upper submounts include
a first submount including a first upper surface on which the first light-emitting element is disposed, and a first lateral surface extending from the first upper surface and located on a same side as the first emission end surface of the first light-emitting element, and
a second submount including a second upper surface on which the second light-emitting element is disposed, and a second lateral surface extending from the second upper surface and located on a same side as the second emission end surface of the second light-emitting element,
the lower submount including an upper surface on which the first submount and the second submount are disposed, and a front lateral surface extending from the upper surface and located on a same side as the first lateral surface of the first submount and the second lateral surface of the second submount,
in a top plan view of the upper surface of the lower submount, with a propagating direction of the first light along an optical axis being forward,
the first lateral surface of the first submount is located more forward than the second lateral surface of the second submount,
the first emission end surface of the first light-emitting element is located more forward than the second emission end surface of the second light-emitting element, and
at least a portion of the first lateral surface of the first submount is protruded more forward than an edge along which the upper surface and the front lateral surface of the lower submount meet.

11 more elements

A light-emitting device comprising:

a first light-emitting element having a first emission end surface including one or more first light-emitting points each configured to emit a first light;
a second light-emitting element having a second emission end surface including one or more second light-emitting points each configured to emit a second light;
a first submount having a first upper surface, on which the first light-emitting element is disposed, and a first lateral surface extending from the first upper surface and located on a same side as the first emission end surface of the first light-emitting element;
a second submount having a second upper surface on which the second light-emitting element is disposed, and a second lateral surface extending from the second upper surface and located on a same side as the second emission end surface of the second light-emitting element;
and
a package including a base portion having a mounting surface, lateral wall portions surrounding the mounting surface and extending upward, and a mounting block portion having an upper surface located higher than the mounting surface,
wherein the first submount and the second submount are disposed on the upper surface of the mounting block portion,
the mounting block portion further has a front lateral surface located on a same side as the first lateral surface and the second lateral surface, and extending from the upper surface of the mounting block portion, and
in a top plan view of the upper surface of the mounting block portion, with a propagating direction of the first light along an optical axis being forward,
the first lateral surface of the first submount is located more forward than the second lateral surface of the second submount,
the first emission end surface of the first light-emitting element is located more forward than the second emission end surface of the second light-emitting element, and
at least a portion of the first lateral surface of the first submount is protruded more forward than an edge along which the upper surface and the front lateral surface meet.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/727,594Filed 22 Apr 2022
Priority: JP 2021-07342623 Apr 2021
Published: US 2022/0344896 A127 Oct 2022
Granted: 23 Sep 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H01S 5/02315
Mount members, e.g. sub-mount members: support members, e.g. bases or carriers
H01S 5/02216
Characterised by the shape of the housings: butterfly-type, i.e. with electrode pins extending horizontally from the housings
H01S 5/02345
Mounting configuration of laser chips: wire-bonding
H01S 5/02469
Arrangements for thermal management: passive cooling, e.g. where heat is removed by the housing as a whole or by a heat pipe without any active…