LED tube lamp

• US 9,927,071 B2
• Filed: 04/20/2017
• Issued: 03/27/2018
• Est. Priority Date: 09/28/2014
• Status: Active Grant

• Current Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Original Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Inventors: Jiang, Tao
• Primary Examiner(s): TRAN, ANH Q
• Application Number:
  US15/492,486
• Publication Number:
  US 20170219169A1
• Time in Patent Office: 341 Days
• Field of Search: None
• CPC Class Codes: B23K 1/0016 Brazing of electronic components
• CPC Class Codes: B23K 2101/42 Printed circuits
• CPC Class Codes: B23K 3/047 electric
• CPC Class Codes: C03C 21/002 to perform ion-exchange between alkali ions C03C21/005 takes precedence
• CPC Class Codes: C03C 27/048 consisting of an adhesive specially adapted for that purpose
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21K 9/235 Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps F21K9/238 takes precedence
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/272 Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts F21K9/278 takes precedence
• CPC Class Codes: F21K 9/275 Details of bases or housings, i.e. the parts between the light-generating element and the end caps; Arrangement of components within bases or housings F21K9/278 takes precedence
• CPC Class Codes: F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21V 15/015 Devices for covering joints between adjacent lighting devices; End coverings
• CPC Class Codes: F21V 17/101 permanently, e.g. welding, gluing or riveting
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 25/02 coming into action when lighting device is disturbed, dismounted, or broken
• CPC Class Codes: F21V 25/04 breaking the electric circuit
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 3/061 : the material being glass
• CPC Class Codes: F21V 3/10 : characterised by coatings
• CPC Class Codes: F21V 7/22 : characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
• CPC Class Codes: F21V 7/28 : characterised by coatings
• CPC Class Codes: F21Y 2101/00 : Point-like light sources
• CPC Class Codes: F21Y 2103/00 : Elongate light sources, e.g. fluorescent tubes
• CPC Class Codes: F21Y 2103/10 : comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 : Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/37 : Converter circuits
• CPC Class Codes: H05B 45/50 : responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
• CPC Class Codes: H05B 6/105 : using a susceptor

Abstract

An LED tube lamp comprises a plurality of LED light sources, two end caps, a lamp tube, and an LED light strip. The lamp tube extends in a first direction along a length of the lamp tube, and has two ends respectively sleeved to the end caps. The LED light strip is disposed inside the lamp tube, and the LED light sources are on the LED light strip. Each end cap comprises an electrically insulating tube and a magnetic metal member. The magnetic metal member is fixedly on an inner circumferential surface of the electrically insulating tube and interposed between the electrically insulating tube and the end of the lamp tube. The LED tube lamp further comprises a hot melt adhesive on the inner surface of the magnetic metal member and adhered to the outer peripheral surface of the end of the lamp tube.

Claims

1. An LED tube lamp, comprising:

a plurality of LED light sources;

two end caps;

a lamp tube extending in a first direction along a length of the lamp tube, and having two ends respectively sleeved to each of the end caps;

an LED light strip disposed inside the lamp tube, and the plurality of the LED light sources being on the LED light strip;

wherein each of the end caps comprises;

an electrically insulating tube; and

a magnetic metal member, on an inner circumferential surface of the electrically insulating tube and interposed between the electrically insulating tube and the end of the lamp tube; and

the LED tube lamp comprises a hot melt adhesive on the inner surface of the magnetic metal member and adhered to the outer peripheral surface of the end of the lamp tube.

2. The LED tube lamp as claimed in claim 1, wherein the magnetic metal member is partially overlapped with the lamp tube in the radial direction.

3. The LED tube lamp as claimed in claim 1, wherein the whole magnetic metal member is inside the electrically insulating tube.

4. The LED tube lamp as claimed in claim 1, wherein the magnetic metal member includes at least one opening.

5. The LED tube lamp as claimed in claim 1, wherein the magnetic metal member includes an indentation depressed under the inner surface of the magnetic metal member.

6. The LED tube lamp as claimed in claim 1, wherein the magnetic metal member includes an embossment is raised from the inner surface of the magnetic metal member.

7. The LED tube lamp as claimed in claim 1, wherein the electrically insulating tube is divided into a first tubular part and a second tubular part, an inner diameter of the first tubular part for supporting the magnetic metal member is larger than the inner diameter of the second tubular part, and a stepped structure is formed at the connection of the first tubular part and the second tubular part.

8. The LED tube lamp as claimed in claim 1, wherein the electrically insulating tube further comprises a supporting portion on the inner surface of the electrically insulating tube to be extending inwardly, and the magnetic metal member is axially abutted against an upper edge of the supporting portion.

9. The LED tube lamp as claimed in claim 8, wherein the electrically insulating tube further comprises a protruding portion on the inner surface of the electrically insulating tube to be extending inwardly, and the magnetic metal member is radially abutted against a side edge of the protruding portion and the outer surface of the magnetic metal member and the inner surface of the electrically insulating tube is spaced apart with a gap.

10. The LED tube lamp as claimed in claim 9, wherein the protruding portion and the supporting portion are connected along the axial direction and the magnetic metal member is axially abutted against the upper edge of the supporting portion while radially abutted against the side edge of the protruding portion.

11. The LED tube lamp as claimed in claim 10, wherein the protruding portion is arranged along the circumferential direction of the electrically insulating tube to have a circular configuration.

12. The LED tube lamp as claimed in claim 10, wherein the protruding portion is in the form of a plurality of bumps arranged on the inner surface of the electrically insulating tube.

13. The LED tube lamp as claimed in claim 1, further comprising a power supply in one of the end caps or separately in both of the end caps, wherein the LED light strip is electrically connected the LED light sources with the power supply.

14. An LED tube lamp, comprising:

a plurality of LED light sources;

two end caps, each comprising an electrically insulating tube;

a lamp tube extending in a first direction along a length of the lamp tube, and having two ends respectively sleeved to each of the end caps;

an LED light strip disposed inside the lamp tube, and the plurality of the LED light sources being on the LED light strip;

wherein the LED tube lamp comprises a hot melt adhesive including permeability powders and, the hot melt adhesive is coated on the inner surface of the end cap and adhere the end cap and the lamp tube.

15. The LED tube lamp as claimed in claim 14, wherein a relative permeability of the permeability powder ranges from about 10² to about 10⁶.

16. The LED tube lamp as claimed in claim 14, wherein the permeability powders is iron, nickel, cobalt, alloy, or any combination thereof.

17. The LED tube lamp as claimed in claim 16, wherein the weight percentage of the permeability powders with respect to the hot melt adhesive is about 10% to about 50%.

18. The LED tube lamp as claimed in claim 16, wherein the powders has mean particle size of about 1 to about 30 μ

m.

19. The LED tube lamp as claimed in claim 14, wherein the permeability powders is uniformly distributed in the hot melt adhesive.

20. The LED tube lamp as claimed in claim 14, wherein the permeability powders is random distributed in the hot melt adhesive.

21. The LED tube lamp as claimed in claim 14, further comprising a power supply in one of the end caps or separately in both of the end caps, wherein the LED light strip is electrically connected the LED light sources with the power supply.

22. An LED tube lamp, comprising:

a plurality of LED light sources;

two end caps;

a lamp tube extending in a first direction along a length of the lamp tube, and having two ends respectively sleeved to each of the end caps;

an LED light strip on the inner circumferential surface of the lamp tube and having an end portion extending inside one of the end caps, and the plurality of the LED light sources being on the LED light strip;

wherein each of the end caps comprises;

an electrically insulating tube; and

a magnetic metal member, on an inner circumferential surface of the electrically insulating tube and interposed between the electrically insulating tube and the end of the lamp tube; and

the LED tube lamp comprises a hot melt adhesive on the inner surface of the magnetic metal member and adhered to the outer peripheral surface of the end of the lamp tube.

23. The LED tube lamp as claimed in claim 22, further comprising a power supply in one of the end caps or separately in both of the end caps, wherein the LED light strip is electrically connected the LED light sources with the power supply.