LED filament module and LED light bulb

• US 10,473,271 B2
• Filed: 12/01/2016
• Issued: 11/12/2019
• Est. Priority Date: 08/17/2015
• Status: Active Grant

• Current Assignee: Zhejiang Super Lighting Electric Appliance Company Limited
• Original Assignee: Zhejiang Super Lighting Electric Appliance Company Limited
• Inventors: Jiang, Tao, Li, Liqin, Fei, Heping, Yao, Wentao, Zhou, Lvhui, Wang, Cheng, Wang, Jin
• Primary Examiner(s): Gramling, Sean P
• Application Number:
  US15/366,535
• Publication Number:
  US 20170084809A1
• Time in Patent Office: 1,076 Days
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21Y 2103/33 annular
• CPC Class Codes: F21Y 2103/37 U-shaped
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/45014 Ribbon connectors, e.g. rectangular cross-section
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

An LED filament module and an LED light bulb are disclosed. The LED filament module includes one or more LED filaments, a first connecting portion, and a second connecting portion. The LED filaments are spaced from each other. Each of the LED filaments includes a first conductive electrode and a second conductive electrode opposite to the first conductive electrode. The first connecting portion is connected with the first conductive electrodes. The second connecting portion is connected with the second conductive electrodes. The LED filament module has a first type. The LED filaments, the first connecting portion, and the second connecting portion of the first type are in a three dimensional form. One or two between the first connecting portion and the second connecting portion of the first type has a torus shape.

Claims

1. A LED filament module, comprising

a plurality of LED filaments spaced from each other, wherein each of the LED filaments comprises a first conductive electrode and a second conductive electrode opposite to the first conductive electrode;

a first connecting portion connected with the first conductive electrodes;

a second connecting portion connected with the second conductive electrodes;

a plurality of filament brackets, wherein the filament brackets are connected between the first connecting portion and the second connecting portion, and each of the LED filaments is respectively attached to each of the filament brackets,

wherein, the first connecting portion comprises insulation portions, the second connecting portion comprises insulation portions, the first connecting portion and the second connecting portion are made by conductive materials except the insulation portions, and the insulation portions of the first connecting portion and the second connecting portion are arranged in a staggered manner to allow currents to flow through each of the LED filaments in one direction.

2. The LED filament module of claim 1, wherein one or both of the first connecting portion and the second connection portion have a torus shape.

3. The LED filament module of claim 2, wherein at least one of the first connecting portion and the second connecting portion has an opening.

4. The LED filament module of claim 1, wherein while the LED filaments, the first connecting portion, and the second connecting portion are flatted, the LED filaments, the first connecting portion, and the second connecting portion form a sector outline.

5. The LED filament module of claim 4, wherein while the LED filaments, the first connecting portion, and the second connecting portion are flatted, the first connecting portion and the second connecting portion respectively have arc shapes.

6. The LED filament module of claim 5, wherein while the LED filaments, the first connecting portion, and the second connecting portion are flatted, the arc length of the arc shape of the first connecting portion is less than that of the second connecting portion.

7. The LED filament module of claim 6, wherein the LED filaments, the first connecting portion, and the second connecting portion form a shape of frustum of a cone.

8. The LED filament module of claim 1, wherein while the LED filaments, the first connecting portion, and the second connecting portion are flatted, the LED filaments, the first connecting portion, and the second connecting portion form a rectangular outline.

9. The LED filament module of claim 8, wherein while the LED filaments, the first connecting portion, and the second connecting portion are flatted, the first connecting portion and the second connecting portion respectively have straight shapes.

10. The LED filament module of claim 9, wherein while the LED filaments, the first connecting portion, and the second connecting portion are flatted, the straight length of the straight shape of the first connecting portion is substantially equal to that of the second connecting portion.

11. The LED filament module of claim 10, wherein the LED filaments, the first connecting portion, and the second connecting portion form a shape of column.

12. The LED filament module of claim 1, wherein the LED filaments, the first connecting portion, and the second connecting portion are formed in one piece.

13. The LED filament module of claim 1, wherein the LED filaments, the first connecting portion, and the second connecting portion are a jig-shaped member.

14. The LED filament module of claim 1, wherein each of the filament brackets respectively extends along an axial direction of the respective one of the LED filament.

15. The LED filament module of claim 14, wherein the filament brackets comprise materials with conductibility.

16. The LED filament module of claim 14, wherein each of the filament brackets respectively extends along the axial direction of the respective one of the LED filament from the first connecting portion to the second connecting portion.

17. The LED filament module of claim 14, wherein each of the filament brackets is separated into two parts comprising a top filament bracket and a bottom filament bracket, the top filament brackets are connected with the first connecting portion, the bottom filament brackets are connected with the second connecting portion, the length of the top filament bracket and the bottom filament bracket is less than a half of the length of the LED filament.

18. The LED filament module of claim 1, wherein the LED filaments are equally spaced or the LED filaments are unequally spaced.

19. The LED filament module of claim 14, wherein the first connecting portion and the second connecting portion are made by conductive materials, and each of the filament brackets comprises an insulation portion to prevent currents from flowing through the filament brackets.

20. The LED filament module of claim 14, wherein the first connecting portion and the second connecting portion are made by conductive materials, each of the filament brackets is separated into two parts comprising a top filament bracket and a bottom filament bracket, the top filament brackets are connected with the first connecting portion, the bottom filament brackets are connected with the second connecting portion, and the top filament bracket and the bottom filament bracket of each of the filament brackets are physically separated to prevent currents from flowing through the filament brackets.

21. The LED filament module of claim 1, wherein each of the LED filaments comprises:

a plurality of LED chips, electrically connected together;

two conductive electrodes, disposed corresponding to the plurality of LED chips, the conductive electrodes being electrically connected with the plurality of LED chips; and

a flexible light conversion coating, coating on each side of the LED chips and a portion of the conductive electrodes, and exposing a portion of two of the conductive electrodes, and the light conversion coating comprising an adhesive and a plurality of particles, the plurality of particles at least comprises phosphors.

22. The LED filament module of claim 21, wherein a percentage of the particles in the flexible light conversion coating is greater than a percentage of the adhesive in the flexible light conversion coating.

23. The LED filament module of claim 22, wherein the flexible light conversion coating further comprises at least one thermal conduction path formed by at least a part of the particles which are adjacent to and contact one another, the at least one thermal conduction path has an internal end and an external end, the internal end of the at least one thermal conduction path contacts one of the LED chips, and the external end of the at least one thermal conduction path contacts the surface of the flexible light conversion coating away from the LED chips and is exposed from the surface of the flexible light conversion coating.

24. The LED filament module of claim 1, wherein each of the LED filaments comprises:

a plurality of LED chips electrically connected together;

two conductive electrodes disposed corresponding to the plurality of LED chips, the conductive electrodes being electrically connected with the plurality of LED chips; and

a flexible light conversion coating comprising a top layer and a base layer, the flexible light conversion coating coating on each side of the LED chips and a portion of the conductive electrodes and exposing a portion of the conductive electrodes, the LED chips interposed between the base layer and the top layer,

wherein the top layer comprises a first adhesive and a plurality of first particles and the base layer comprises a second adhesive and a plurality of second particles, the plurality of first particles at least comprises phosphors, and the plurality of second particles at least comprises phosphors.

25. The LED filament module of claim 24, wherein a percentage of the plurality of first particles in the top layer is greater than a percentage of the first adhesive in the top layer, and a percentage of the plurality of second particles in the base layer is greater than a percentage of the second adhesive in the base layer.

26. The LED filament module of claim 25, wherein the flexible light conversion coating further comprises at least two of the thermal conduction paths comprising a first thermal conduction path formed by at least a part of the first particles which are adjacent to and contact one another and a second thermal conduction path formed by at least a part of the second particles which are adjacent to and contact one another, the external end of the first thermal conduction path contacts a first surface of the flexible light conversion coating away from the LED chips and is exposed from the first surface of the flexible light conversion coating, the external end of the second thermal conduction path contacts a second surface of the flexible light conversion coating away from the LED chips and is exposed from the second surface of the flexible light conversion coating, the first surface and the second surface are opposite to each other, and one of first surface and the second surface is an illumination surface of the LED filament.

27. An LED light bulb, comprising:

a bulb shell;

a bulb base connected with the bulb shell;

a driving circuit disposed in the bulb base;

two conductive supports installed in the bulb shell and electrically connected to the driving circuit;

an LED filament module installed in the bulb shell, comprising;

a first connecting portion and a second connecting portion, the first and the second connecting portions electrically connecting to the two conductive supports both of the first connecting portion and the second connecting portion have a shape surrounding the center axle of the bulb base;

a plurality of LED filaments, each of the LED filaments comprising a first conductive electrode and a second conductive electrode opposite to the first conductive electrode, the first conductive electrodes being connected to the first connecting portion, and the second conductive electrodes being connected to the second connecting portion; and

a plurality of filament brackets, wherein the filament brackets are connected between the first connecting portion and the second connecting portion, and each of the LED filaments is respectively attached to each of the filament brackets,

wherein, the first connecting portion comprises insulation portions, the second connecting portion comprises insulation portions, the first connecting portion and the second connecting portion are made by conductive materials except the insulation portions, and the insulation portions of the first connecting portion and the second connecting portion are arranged in a staggered manner to allow currents to flow through each of the LED filaments in one direction.

28. The LED light bulb of claim 27, further comprising a stand and at least one supporting arm, the supporting arms comprises a hook end and a fixed end, the hook end extends radially from the stand for connecting with one of the connecting portions, and the fixed end is embedded into the stand.

29. The LED light bulb of claim 28, further comprising at least two supporting arms and there is a gap between any two of the fixed ends of the supporting arms in the stand to keep the supporting arms being insulated from each other.

30. The LED light bulb of claim 28, wherein the hook end of the supporting arm forms a hook structure, and one of the connecting portions is hung on the hook structure of the hook end.

31. The LED light bulb of claim 30, wherein one of the connecting portions is tightly fitted in the hook structure.

32. The LED light bulb of claim 27, wherein both of the two conductive supports are connected to the second connecting portion or both of the two conductive supports are connected to the first connecting portion.

33. The LED light bulb of claim 27, wherein one of the two conductive supports is connected to the second connecting portion, and the other one of the two conductive supports is connected to the first connecting portion.

34. The LED light bulb of claim 27, wherein each of the LED filaments comprises a main illuminating face and secondary illuminating faces, the main illuminating faces of all of the LED filaments face toward outside of the LED light bulb or inside of the LED light bulb, or the main illuminating faces of a part of the LED filaments face toward outside of the LED light bulb.

35. The LED light bulb of claim 27, wherein the length of the first connecting portion is less than that of the second connecting portion.

36. The LED light bulb of claim 35, wherein the LED filament module has a shape of frustum of a cone.

37. The LED light bulb of claim 27, wherein the length of the first connecting portion is substantially equal to that of the second connecting portion.

38. The LED light bulb of claim 37, wherein the LED filament module has a shape of column.

39. The LED light bulb of claim 27, wherein each of the filament brackets respectively extends along an axial direction of the respective one of the LED filaments.

40. The LED light bulb of claim 39, wherein the filament brackets comprise materials with conductibility.

41. The LED light bulb of claim 39, wherein each of the filament brackets respectively extends along the axial direction of the respective one of the LED filaments from the first connecting portion to the second connecting portion.

42. The LED light bulb of claim 27, wherein the LED filaments are equally spaced or unequally spaced.