LED bulb lamp

Patent metadata

Field	Value
Publication number	US-10655792-B2
Application number	US-201715723297-A
Country	US
Kind code	B2
Filing date	Oct 3, 2017
Priority date	Sep 28, 2014
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

An LED filament includes LED chips in an array, two conductive electrodes, conductive wires, an enclosure coating, and an auxiliary piece. The chips are connected with one another. The electrodes are corresponding to the chips. Each electrode is connected to a corresponding LED chip at an end of the array. The wires connect the chips and the electrodes. The wires are respectively between every two adjacent chips and between each of the electrodes and the corresponding chip at an end of the array. The coating is on two or more sides of the array and the two electrodes. A portion of each of the electrodes is exposed from the coating. The auxiliary piece is in the coating and overlaps one of the wires between each of the electrodes and the corresponding one of the two chips respectively at two ends of the array on a radial direction of the filament.

First claim

What is claimed is:

1. An LED filament comprising:
a plurality of LED chips arranged in an array and electrically connected with one another;
two conductive electrodes disposed corresponding to the LED chips at two ends of the array, respectively;
a plurality of conductive wires comprising a plurality of first conductive wires and two second conductive wires, the plurality of the first conductive wires respectively electrically connecting every two adjacent LED chips of the array, and the two second conductive wires respectively connecting the two conductive electrodes with the LED chips at the two ends of the array;
an enclosure coating on at least two sides of the array and the two conductive electrodes, a portion of each of the two conductive electrodes being exposed from the enclosure; and
at least one auxiliary piece disposed in the enclosure coating and overlapping at least one of the two second conductive wires on a radial direction of the LED filament.

2. The LED filament of claim 1 , wherein each of the two conductive electrodes comprises a connecting region electrically connected to the corresponding LED chip at the end of the array via one of the two second conductive wires, and the at least one auxiliary piece extends from a side of the corresponding connecting region along an axial direction of the LED filament.

3. The LED filament of claim 2 , wherein the at least one auxiliary piece is connected to a side of the corresponding connecting region.

4. The LED filament of claim 2 , wherein the at least one auxiliary piece further overlaps at least a portion of the corresponding connecting region and at least a portion of the corresponding LED chip at the end of the array on the radial direction of the LED filament.

5. The LED filament of claim 2 , wherein a width of the connecting region on the radial direction of the LED filament is equal to a width of the enclosure on the radial direction of the LED filament.

6. The LED filament of claim 2 , wherein a width of the at least one auxiliary piece on the radial direction of the LED filament is less than a width of the connecting region on the radial direction of the LED filament.

7. The LED filament of claim 1 , wherein the at least one auxiliary piece further overlaps one or more of the LED chips on the radial direction.

8. The LED filament of claim 1 , wherein the at least one auxiliary piece further overlaps all of the first conductive wires on the radial direction.

9. The LED filament of claim 1 , wherein the number of the at least one auxiliary piece is two, and the two auxiliary pieces respectively overlap the two second conductive wires on the radial direction.

10. The LED filament of claim 1 , wherein the number of the at least one auxiliary piece is two, and each of the two auxiliary pieces overlaps all of the first conductive wires on the radial direction.

11. The LED filament of claim 1 , wherein the at least one auxiliary piece is divided into a plurality of segments, and the segments of the at least one auxiliary piece respectively overlap the first and second conductive wires on the radial direction.

12. The LED filament of claim 1 , wherein the second conductive wire is shorter than the first conductive wire.

13. An LED filament comprising:
a plurality of LED chips arranged in an array and electrically connected with one another;
two conductive electrodes disposed corresponding to the LED chips at two ends of the array, respectively;
a plurality of conductive wires comprising a plurality of first conductive wires and two second conductive wires, the plurality of the first conductive wires respectively electrically connecting every two adjacent LED chips of the array, and the two second conductive wires respectively connecting of the two conductive electrodes with the LED chips at the two ends of the array;
an enclosure coating on at least two sides of the array and the two conductive electrodes, a portion of each of the two conductive electrodes being exposed from the enclosure; and
at least one auxiliary piece disposed in the enclosure coating, the at least one auxiliary piece disposed at a side of at least one of the two second conductive wires and a side of the conductive electrode connecting to the at least one of the two second conductive wires.

14. The LED filament of claim 13 , wherein each of the two conductive electrodes comprises a connecting region electrically connected to the corresponding LED chip at the end of the array via one of the two second conductive wires, and the at least one auxiliary piece extends from a side of the corresponding connecting region along the axial direction of the LED filament.

15. The LED filament of claim 14 , wherein the at least one auxiliary piece is connected to a side of the corresponding connecting region.

16. The LED filament of claim 14 , wherein a width of the connecting region on a radial direction of the LED filament is equal to a width of the enclosure on the radial direction of the LED filament.

17. The LED filament of claim 14 , wherein a width of the at least one auxiliary piece on a radial direction of the LED filament is less than a width of the connecting region on the radial direction of the LED filament.

18. The LED filament of claim 13 , wherein the at least one auxiliary piece overlaps one or more of the LED chips on a radial direction of the LED filament.

19. The LED filament of claim 13 , wherein the at least one auxiliary piece overlaps all of the first conductive wires on a radial direction of the LED filament.

20. The LED filament of claim 13 , wherein the number of the at least one auxiliary piece is two, and the two auxiliary pieces respectively overlap the two second conductive wires on a radial direction of the LED filament.

21. The LED filament of claim 13 , wherein the number of the at least one auxiliary piece is two, and each of the two auxiliary pieces overlaps all of the first conductive wires on a radial direction of the LED filament.

22. The LED filament of claim 13 , wherein the at least one auxiliary piece is divided into a plurality of segments, and the segments of the at least one auxiliary piece respectively overlap the first conductive wires on a radial direction of the LED filament.

23. The LED filament of claim 13 , wherein the second conductive wire is shorter than the first conductive wire.

24. An LED light bulb, comprising:
a bulb shell;
a bulb base connected with the bulb shell;
two conductive supports disposed in the bulb shell;
a driving circuit electrically connected with the two conductive supports and the bulb base; and
an LED filament, comprising:
a plurality of LED chips arranged in an array and electrically connected with one another;
two conductive electrodes disposed corresponding to the LED chips at two ends of the array, respectively, wherein the two conductive electrodes are respectively connected to the two conductive supports;
a plurality of conductive wires comprising a plurality of first conductive wires and two second conductive wires, the plurality of the first conductive wires respectively electrically connecting every two adjacent LED chips of the array, and the two second conductive wires respectively connecting the two conductive electrodes with the LED chips at the two ends of the array;
an enclosure coating on at least two sides of the array and the two conductive electrodes, a portion of each of the two conductive electrodes being expos

Assignees

• Zhejiang Super Lighting Electric Appliance Co Ltd

Inventors

• Jiang Tao

Classifications

• F21K9/68

  Details of reflectors forming part of the light source · CPC title

• F21Y2109/00

  Light sources with light-generating elements disposed on transparent or translucent supports or substrates · CPC title

• F21V29/503

  of light sources (cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H10H20/858) · CPC title

• F21K9/61

  using light guides · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title