Light emitting device

Patent metadata

Field	Value
Publication number	US-9587811-B2
Application number	US-201314077321-A
Country	US
Kind code	B2
Filing date	Nov 12, 2013
Priority date	Nov 13, 2012
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A light emitting device includes a flexible substrate member having a base member and a plurality of wiring portions disposed on a surface of the base member, a plurality of light emitting elements arranged on the surface of the base member and electrically connected to the plurality of wiring portions, and a plurality of sealing members sealing corresponding parts of the substrate member and the light emitting elements respectively. The substrate is curved so that at least a part of periphery of the sealing member is arranged at a position lower than the position on which the light emitting element is disposed.

First claim

What is claimed is:

1. A light emitting device comprising:
a flexible substrate member having a base member and a pair of wiring portions disposed on a surface of the base member with a groove being defined between the pair of wiring portions;
a plurality of light emitting elements disposed on the surface of the base member and electrically connected to the pair of wiring portions with each of the light emitting elements being mounted on the pair of wiring portions in a flip-chip manner with the groove being arranged under each of the light emitting elements; and
a plurality of sealing members each sealing a part of the base member and a corresponding one of the light emitting elements,
the substrate member having an elongated shape extending in a longitudinal direction, and the substrate member being in a curved state in a lateral direction which is perpendicular to the longitudinal direction, a length of the substrate in the longitudinal direction being longer than a width of the substrate in the lateral direction, and at least a part of periphery of each of the sealing members, which is disposed on the pair of wiring portions on which a corresponding one of the light emitting elements is arranged, being positioned lower than an upper surface of the pair of wiring portions with respect to the lateral direction, and
the groove arranged under each of the light emitting elements extending along the longitudinal direction.

2. The light emitting device according to claim 1 , further comprising
a fixing member configured to maintain the curved state of the substrate member.

3. The light emitting device according to claim 1 , wherein
the substrate member has a locking section respectively at both end portions in the lateral direction.

4. The light emitting device according to claim 1 , wherein
the light emitting elements are arranged in a single line in the longitudinal direction on the surface of the substrate member.

5. The light emitting device according to claim 1 , wherein
the substrate member is curved with a curvature radius R of about 50 mm to 3 mm.

6. The light emitting device according to claim 2 , wherein
the fixing member includes one of a protruded portion, a recessed portion, a projection, a hole, a through hole, and a slit.

7. The light emitting device according to claim 3 , wherein
the locking section includes one of a protruded portion, a recessed portion, a projection, a hole, a through hole, and a slit.

8. The light emitting device according to claim 1 , wherein
at least a part of the periphery of the sealing member is arranged on a covering layer.

9. A light emitting device comprising:
a flexible substrate member having a base member and a pair of wiring portions disposed on a surface of the base member with a groove being defined between the pair of wiring portions, the substrate member having an elongated shape extending in a longitudinal direction, a length of the substrate in the longitudinal direction being longer than a width of the substrate in the lateral direction, and the substrate member being in a curved state in a lateral direction which is perpendicular to the longitudinal direction;
a plurality of light emitting elements disposed on the surface of the base member and electrically connected to the pair of wiring portions with each of the light emitting elements being mounted on the pair of wiring portions in a flip-chip manner with the groove being arranged under each of the light emitting elements; and
a plurality of sealing members each sealing a part of the base member and a corresponding one of the light emitting elements,
the substrate member having a fixing member configured to maintain the curved state of the substrate member, and
the groove arranged under each of the light emitting elements extending along the longitudinal direction.

10. The light emitting device according to claim 9 , wherein
the fixing member includes one of a protruded portion, a recessed portion, a projection, a hole, a through hole, and a slit.

11. A light emitting device comprising:
a flexible substrate member having a base member and a pair of wiring portions disposed on a surface of the base member with a groove being defined between the pair of wiring portions, the substrate member having an elongated shape extending in a longitudinal direction, a length of the substrate in the longitudinal direction being longer than a width of the substrate in the lateral direction, and the substrate member being in a curved state in a lateral direction which is perpendicular to the longitudinal direction;
a plurality of light emitting elements disposed on the surface of the base member and electrically connected to the pair of wiring portions with each of the light emitting elements being mounted on the pair of wiring portions in a flip-chip manner with the groove being arranged under each of the light emitting elements; and
a plurality of sealing members each sealing a part of the base member and a corresponding one of the light emitting elements,
the substrate member having a locking section respectively at both end portions in a lateral direction, and
the groove arranged under each of the light emitting elements extending along the longitudinal direction.

12. The light emitting device according to claim 11 , wherein
the locking section includes one of a protruded portion, a recessed portion, a projection, a hole, a through hole, and a slit.

Assignees

• Nichia Corp

Inventors

• Kamada Kazuhiro

Classifications

• F21V7/30

  the coatings comprising photoluminescent substances · CPC title

• F21V31/005

  Sealing arrangements therefor · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21Y2103/10

  comprising a linear array of point-like light-generating elements · CPC title

• F21S4/22 Primary

  flexible or deformable, e.g. into a curved shape · CPC title