Light source and lighting device including the same

Patent metadata

Field	Value
Publication number	US-9599289-B2
Application number	US-201213667511-A
Country	US
Kind code	B2
Filing date	Nov 2, 2012
Priority date	Nov 2, 2011
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

In some embodiments, a light source including a first electrode that includes a projection and a depression, a second electrode including a projection and a depression, an insulating layer disposed between the first electrode and the second electrode, and a light-emitting element straddling the insulating layer and disposed on the projection of the first electrode and on the projection of the second electrode. In other embodiments, a lighting device including a base that includes a first terminal and a second terminal that are configured to be electrically connected to the light source to supply current to the light-emitting element. In some embodiments, the lighting device is a lighting bulb, and in other embodiments, the lighting device is tube-shaped.

First claim

What is claimed is:

1. A light source comprising:
an electrode-assembly comprising a first electrode including a projection and a depression, a second electrode including a projection and a depression, and an insulating layer disposed between the first electrode and the second electrode to configure the electrode assembly in a shape of a rectangular parallelepiped; and
two or more light-emitting elements, each of the two or more light-emitting elements with a p-electrode and a n-electrode arranged on the electrode-assembly to straddle the insulating layer of the electrode-assembly, the p-electrode and the n-electrode of each of the two or more light-emitting elements being electrically disposed on the projection of the first electrode and on the projection of the second electrode of the electrode-assembly that has the shape of a rectangular parallelepiped,
the projection of the first electrode fitting in the depression of the second electrode on contact with the insulating layer and the projection of the second electrode fitting in the depression of the first electrode on contact with the insulating layer to configure the electrode-assembly, and
the two or more light-emitting elements being arranged on two or more surfaces of the electrode-assembly that has the shape of the rectangular parallelepiped.

2. A light source comprising:
an electrode-assembly comprising a first electrode including projections and depressions, and a second electrode including projections and depressions, an insulating layer disposed between the first electrode and the second electrode to configure the electrode assembly in a shape of a rectangular parallelepiped; and
light-emitting elements, each with a p-electrode and a n-electrode being arranged on the electrode-assembly to straddle the insulating layer of the electrode-assembly, and the p-electrode and the n-electrode of each of the light-emitting elements being disposed on each of the projections of the first electrode and on each of the projections of the second electrode of the electrode-assembly that has the shape of a rectangular parallelepiped,
the projections of the first electrode fitting in the depressions of the second electrode on contact with the insulating layer, and the projections of the second electrode fitting in the depressions of the first electrode on contact with the insulating layer to configure the electrode-assembly, and
the light-emitting elements being arranged on two or more surfaces of the electrode-assembly that has the shape of the rectangular parallelepiped.

3. The light source according to claim 2 :
wherein the electrode-assembly includes the first electrode, the second electrode, and the insulating layer sandwiched by the first electrode and the second electrode, and the electrode-assembly includes an elongated shape with a first end and a second end that is positioned at an opposite side of the first end of the elongated shape of the electrode-assembly.

4. The light source according to claim 3 :
wherein the electrode-assembly includes the first end, the second end at the opposite side of the first end, and peripheral side surfaces between the first end and the second end.

5. The light source according to claim 4 :
wherein the light-emitting elements that straddle the insulating layer and are mounted on the projections of the first electrode and on the projections of the second electrode are aligned in a straight line at a first side surface of the peripheral side surfaces of the electrode-assembly.

6. The light source according to claim 5 :
wherein the light-emitting elements that straddle the insulating layer of the electrode-assembly are mounted on the projections of the first electrode and on the projections of the second electrode are aligned in a straight line at a second side surface that is positioned at an opposite side of the first side surface of the peripheral side surfaces of the electrode assembly.

7. The light source according to claim 6 further comprising:
one or more of the light-emitting elements straddling the insulating layer of the electrode-assembly and being mounted on the first electrode and the second electrode at the second end of the elongated shape of the electrode-assembly.

8. The light source according to claim 1 :
wherein the light-emitting element is a light-emitting diode element.

9. The light source according to claim 1 :
wherein the light-emitting element is a light-emitting package including a substrate with an anode electrode and a cathode electrode and including a light-emitting diode element that is mounted on the substrate and electrically connected to the anode electrode and the cathode electrode of the substrate.

10. The light source according to claim 2 :
wherein the light-emitting elements are light-emitting diode elements.

11. The light source according to claim 2 :
wherein the light-emitting elements are light-emitting packages each including a substrate with an anode electrode and a cathode electrode and including a light-emitting diode element that is mounted on the substrate and electrically connected to the anode electrode and the cathode electrode of the substrate.

12. A lighting device comprising:
a base including a first terminal and a second terminal;
the light source according to claim 1 ; and
the first electrode of the light source configured to be electrically connected to the first terminal of the base and the second electrode of the light source configured to be electrically connected to the second terminal of the base.

13. A lighting device comprising:
the light source according to claim 3 ;
an upper cover covering from above the second end of the elongated shape of the electrode-assembly included in the light source;
a lower cover being positioned at the first end of the elongated shape of the electrode-assembly included in the light source; and
the lower cover including an opening passing through the lower cover from an upper side to a lower side of the lower cover, and
the first end of the elongated shape of the electrode-assembly included in the light source being inserted in the opening of the lower cover from the upper side of the lower cover.

14. The lighting device according to claim 13 ,
wherein the lower cover is made from a metal.

15. The lighting device according to claim 13 ,
wherein the upper cover is made from a material selected from glass and resin.

16. The lighting device according to claim 14 further comprising:
a connector including a first terminal and a second terminal and being positioned in the opening of the lower cover to receive the first end of the elongated shape of the electrode-assembly included in the light source; and
a circuit being positioned under the connector in the opening of the lower cover and electrically connected to the first terminal and the second terminal of the connector.

17. The lighting device according to claim 16 ,
wherein the circuit includes a converter circuit that converts alternating current to direct current that is configured to be supplied to the connector.

18. The lighting device according to claim 14 further comprising:
a circuit being positioned in the opening of the lower cover, and electrically connected to the first electrode and the second electrode of the electrode-assembly included in the light source.

19. The lighting device according to claim 18 ,
wherein the circuit includes a converter circuit that converts alternating current to direct current that is configured to drive the light-emitting

Assignees

• Citizen Electronics
• Citizen Watch Co Ltd

Inventors

• Imai Sadato

Classifications

• F21Y2107/30

  on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21K9/232 Primary

  specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb · CPC title