IP Library Granted Patent US 9,905,545
Granted Patent B2
US 9,905,545 · App. 15/267,775 · Granted Feb 27, 2018

Light emitting device

Inventor: Keiichi Maki (Asahikawa, JP)
Assignee: Toshiba Hokuto Electronics Corporation
H01L25/0756H01L25/0753H01L33/38H01L33/52H01L33/58H01L33/62H01L2924/0002
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Quick Facts
Patent No.
US 9,905,545
App. No.
15/267,775
Granted
Feb 27, 2018
Kind
B2
Abstract

A light emitting device includes a base with a light transmissivity, a first light emitting element which has an electrode formed on only one surface, the electrode being connected to a conductor layer formed on the base, a second light emitting element which has an electrode formed on only one surface, the electrode being connected to the conductor layer formed on the base, and which emits light with a different color from a color of light emitted from the first light emitting element, and a resin layer that holds the first and second light emitting elements against the base.

Claims (48)

1. A light emitting device comprising:

a first light emitting element comprising a first electrode formed on one surface for power supply, and emitting a first color light;

a first upper base which has a light transmissivity, comprises a first conductor layer electrically connected to the first electrode, and formed in a curved shape along the first light emitting element;

a first insulation resin layer that holds the first light emitting element against the first upper base;

a first lower base which is substantially flat, supports the first insulation resin layer and the first light emitting element, and has a light transmissivity;

a second light emitting element comprising a second electrode formed on one surface for power supply, emitting a second color light, and arranged in a manner overlapping the first light emitting element;

a second upper base which has a light transmissivity, comprises a second conductor layer electrically connected to the second electrode, and is formed in curved shape along the second light emitting element;

a second insulation resin layer that holds the second light emitting element against the second upper base;

a second lower base which is substantially flat, supports the second insulation resin layer and the second light emitting element, and has a light transmissivity; and

an intermediate resin layer that is present between the curved second upper base and the flat first lower base.

2. The light emitting device according to claim 1 , wherein a luminosity of each of the light emitting elements is individually adjustable.

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

each respective upper base is connected to a plurality of the light emitting elements; and

a distance between adjacent light emitting elements is equal to or less than 1500 μm.

4. The light emitting device according to claim 1 , comprising a diffuser that diffuses light from the light emitting elements.

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

a thickness of each respective insulation resin layer is equal to or lower than a thickness of each respective light emitting element including the electrode.

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

the upper bases curve to cover the light emitting elements and push the conductor layers to the electrodes of the light emitting elements.

7. A light emitting device comprising:

a first light emitting element comprising a first electrode formed on one surface for power supply, and emitting a first color light;

a first upper base which has a light transmissivity, comprises a first conductor layer electrically connected to the first electrode, and formed in a curved shape along the first light emitting element;

a first insulation resin layer that holds the first light emitting element against the first upper base;

a first lower base that supports the first insulation resin layer and the first light emitting element, and has a light transmissivity;

a second light emitting element comprising a second electrode formed on one surface for power supply, emitting a second color light, and arranged in a manner overlapping the first light emitting element;

a second upper base which has a light transmissivity, comprises a second conductor layer electrically connected to the second electrode, and is formed in curved shape along the second light emitting element;

a second insulation resin layer that holds the second light emitting element against the second upper base;

a second lower base which supports the second insulation resin layer and the second light emitting element, and has a light transmissivity; and

an intermediate resin layer that is present between the curved second upper base and the first lower base.

8. The light emitting device according to claim 7 , wherein a luminosity of each of the light emitting elements is individually adjustable.

9. The light emitting device according to claim 7 , wherein:

each respective upper base is connected to a plurality of the light emitting elements; and

a distance between adjacent light emitting elements is equal to or less than 1500 μm.

10. The light emitting device according to claim 7 , comprising a diffuser that diffuses light from the light emitting elements.

11. The light emitting device according to claim 7 , wherein:

a thickness of each respective insulation resin layer is equal to or lower than a thickness of each respective light emitting element including the electrode.

12. The light emitting device according to claim 7 , wherein:

the upper bases curve to cover the light emitting elements and push the conductor layers to the electrodes of the light emitting elements.

13. A light emitting device comprising:

a first light emitting element comprising a first electrode formed on one surface for power supply;

a first upper base which has a light transmissivity, comprises a first conductor layer electrically connected to the first electrode, and formed in a curved shape along the first light emitting element;

a first insulation resin layer that holds the first light emitting element against the first upper base;

a first lower base that supports the first insulation resin layer and the first light emitting element, and has a light transmissivity;

a second light emitting element comprising a second electrode formed on one surface for power supply, and at least arranged in a manner disposed close to the first light emitting element;

a second upper base which has a light transmissivity, comprises a second conductor layer electrically connected to the second electrode, and is formed in curved shape along the second light emitting element;

a second insulation resin layer that holds the second light emitting element against the second upper base;

a second lower base which supports the second insulation resin layer and the second light emitting element, and has a light transmissivity; and

an intermediate resin layer that is present between the curved second upper base and the first lower base.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 29, 2021
From: TOSHIBA HOKUTO ELECTRONICS CORPORATION
To: NICHIA CORPORATION
Reel/Frame 058223/0932 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 16, 2016
From: MAKI, KEIICHI
To: TOSHIBA HOKUTO ELECTRONICS CORPORATION
Reel/Frame 039766/0786 →
Priority Claims (1)
JP 2014-061993 · Mar 25, 2014 · national
Continuity (2)
Continuation PCTJP2015001600 · Mar 23, 2015
Related Publication 20170005078A1 · Jan 5, 2017