Lighting device

Patent metadata

Field	Value
Publication number	US-10344920-B2
Application number	US-201815860670-A
Country	US
Kind code	B2
Filing date	Jan 3, 2018
Priority date	Apr 1, 2017
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A lighting device includes a filament, a filament fixing element, a driving circuit, a lamp holder and a bulb shell. The filament has a long strip bottom, installed with a plurality of LED modules. The filament fixing element has a bearing surface and a heat dissipation part. The bearing surface connects to the long strip bottom of the filament. The heat dissipation part is connected to the bearing surface to dissipate the heat. The driving circuit provides a suitable current to the filament for emitting light. The lamp holder houses the drive circuit and carries the filament fixing element. The bulb shell and the lamp holder constitute an accommodating space for receiving the filament and the filament fixing element.

First claim

The invention claimed is:

1. A lighting device, comprising:
a filament, provided with a long strip bottom, installed with a plurality of LED modules;
a filament fixing element, provided with a bearing surface and a heat dissipation part, the bearing surface connected to the long strip bottom of the filament, the heat dissipation part connected to the bearing surface to dissipate the heat of the bearing surface through the heat dissipation part;
a driving circuit, provided a suitable current to the filament for emitting light;
a lamp holder, housing the drive circuit and carried the filament fixing element;
a bulb shell, constituted an accommodating space with the lamp holder for receiving the filament and the filament fixing element; and
a sub-light-bar fixing element, connected to the filament fixing element, and the sub-light-bar fixing element also provided with a filament.

2. The lighting device of claim 1 , wherein the filament fixing element comprises a metal plate, the bottom of the metal plate fixed to the lamp holder, the top surface of the metal plate provided with the bearing surface, a main portion of the metal plate used as the heat dissipation part.

3. The lighting device of claim 2 , wherein the filament fixing element has two or more metal plates, the top surface of the two or more metal plates provided with the bearing surface for carrying the two or more filaments, and the two or more metal plates connected to each other to form a three-dimensional unfolded structure, to make the two or more filaments emitted in different directions.

4. The lighting device of claim 3 , wherein a corresponding card slot provides between the two or more metal plates for stabilizing the three-dimensional expanded structure of the two or more metal plates.

5. The lighting device of claim 1 , wherein the bearing surface of the filament fixing element comprises a groove for arranging the filament.

6. The lighting device of claim 1 , wherein the filament fixing element comprises aluminum.

7. The lighting device of claim 1 , wherein the filament fixing element has at least one hollow hole.

8. The lighting device of claim 1 , wherein the filament fixing element has an optical surface for guiding the light emitted by the filament to a predetermined direction.

9. The lighting device of claim 1 , wherein the filament is fixed to the filament fixing element by gluing.

10. The lighting device of claim 9 , wherein the filament is fixed to the filament fixing element by heat dissipation glue.

11. The lighting device of claim 1 , wherein the heat of the driving circuit is also dissipated through the filament fixing element.

12. The lighting device of claim 1 , wherein the lamp holder further comprises a heat dissipation element, the heat dissipation element of the lamp holder assisting the filament fixing element to dissipate heat.

13. The lighting device of claim 1 , wherein the filament is provided with a flexible substrate, the plurality of LED modules provided on the flexible substrate, and bearing surface of the filament fixing element curved, to make the long strip bottom of the filament maintained in bent in a predetermined shape.

14. The lighting device of claim 1 , wherein the filament fixing element further comprises a conductor for directing the current of the driving circuit to the filament.

15. The lighting device of claim 1 , wherein the filament fixing element fixes the filament in an elastic holding manner and provides the conduction of the filament current.

16. The lighting device of claim 1 , wherein the filament fixing element comprises a transparent material to make the filament visually suspended in the accommodating space of the bulb shell.

17. The lighting device of claim 1 , wherein the filament fixing element is a cross-shaped three-dimensional structure.

Assignees

• Xiamen Eco Lighting Co Ltd

Inventors

• Cao Liangliang
• Su Lilei
• Li Wanzhen
• Zeng Maojin
• Huang Xiaojuan
• Zhang Lianwei
• Fu Mingyan

Classifications

• F21V29/74

  with fins or blades · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21V17/101

  permanently, e.g. welding, gluing or riveting · CPC title

• F21V19/005

  by permanent fixing means, e.g. gluing, riveting or embedding in a potting compound · CPC title

• F21K9/238

  Arrangement or mounting of circuit elements integrated in the light source · CPC title