LED tube lamp

• US 9,945,520 B2
• Filed: 04/10/2017
• Issued: 04/17/2018
• 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, Xu, Hong, Li, Liqin, Yang, Chang
• Primary Examiner(s): TRAN, ANH Q
• Application Number:
  US15/483,368
• Publication Number:
  US 20170211753A1
• Time in Patent Office: 372 Days
• Field of Search: None
• 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 9/278 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 23/02 the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• 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 3/02 characterised by the shape
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/10 characterised by coatings
• 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 45/00 Circuit arrangements for operating light-emitting diodes [LED]

Abstract

An LED tube lamp includes a glass tube, a plurality of LED light sources, two end caps respectively sleeving two end portions of the glass tube, a power supply in one of the end caps or separately in both of the end caps, and an LED light strip in the glass tube. The plurality of LED light sources is on the LED light strip. Each of the end caps comprises a plurality of openings formed thereon. The plurality of openings dissipating heat resulted from the power supply are divided into two sets. The two sets of the plurality of openings are symmetric to each other with respect to a virtual central axis of the end cap.

Claims

1. An LED tube lamp, comprising:

a glass tube covered by a heat shrink sleeve and having two end portions;

a plurality of LED light sources;

two end caps respectively sleeving the two end portions of the glass tube;

a power supply in one of the end caps or separately in both of the end caps; and

an LED light strip on an inner surface of the glass tube forming a freely extending end portion at one end along a longitudinal direction of the glass tube, the freely extending end portion directly soldered to the power supply, the plurality of LED light sources being on the LED light strip;

wherein each of the end caps comprises;

an end wall; and

two conductive pins on the end wall.

2. The LED tube lamp according to claim 1, further comprising at least two openings on the end wall symmetric to each other with respect to a plane passing through the middle of a line connecting the two pins and perpendicular to the line connecting the two pins.

3. The LED tube lamp according to claim 2, wherein the at least two openings are on a surface of the end wall on which the two pins are disposed.

4. The LED tube lamp according to claim 3, wherein the at least two openings are separately in a shape of an arc.

5. The LED tube lamp according to claim 4, wherein the at least two openings are in a shape of arcs with different sizes.

6. The LED tube lamp according to claim 5, wherein the sizes of the arcs of the at least two openings gradually vary.

7. The LED tube lamp according to claim 6, wherein the heat shrink sleeve is substantially transparent with respect to the wavelength of light from the LED light sources.

8. The LED tube lamp according to claim 1, wherein the number of the at least two openings is six in two sets, and the three openings in one set are in a shape of three arcs with gradually varying sizes.

9. The LED tube lamp according to claim 1, wherein at least a part of the openings are arranged along an arc and spaced apart from each other.

31. The LED tube lamp according to claim 1, wherein the LED light strip is a bendable circuit sheet.

32. The LED tube lamp according to claim 1, wherein the end cap comprises a metal part.

10. An LED tube lamp, comprising:

a glass tube comprising an inner surface and an outer surface, at least part of the inner surface of the glass tube has a rough surface, the glass tube having two end portions;

a plurality of LED light sources;

two end caps respectively sleeving the two end portions of the glass tube;

a power supply in one of the end caps or separately in both of the end caps; and

an LED light strip on the inner surface of the glass tube forming a freely extending end portion at one end along a longitudinal direction of the glass tube, the freely extending end portion directly soldered to the power supply, the plurality of LED light sources being on the LED light strip.

11. The LED tube lamp according to claim 10, wherein the roughness of the rough surface is substantially from 0.1 to 40 μ

m.

12. The LED tube lamp according to claim 10, wherein each of the end caps comprises a plurality of openings thereon, and the two sets of the plurality of openings are symmetric to each other with respect to a virtual central axis of the end cap.

13. The LED tube lamp according to claim 12, wherein the plurality of openings dissipate heat resulted from the power supply.

14. The LED tube lamp according to claim 10, wherein the plurality of openings are separately in a shape of an arc.

15. The LED tube lamp according to claim 14, wherein the number of the plurality of openings is three, and the three openings are in a shape of three arcs with gradually varying sizes.

16. The LED tube lamp according to claim 10, wherein the plurality of openings are separately in a shape of a circle.

17. The LED tube lamp according to claim 16, wherein the number of the plurality of openings is three, and the three openings are arranged in a shape of an arc.

18. The LED tube lamp according to claim 12, wherein at least a part of the openings are arranged along an arc and spaced apart from each other.

33. The LED tube lamp according to claim 10, wherein the LED light strip is a bendable circuit sheet.

34. The LED tube lamp according to claim 10, wherein the end cap comprises a metal part.

19. An LED tube lamp, comprising:

a glass tube having two end portions;

a plurality of LED light sources;

two end caps respectively sleeving the two end portions of the glass tube, each of the end caps comprising two pins and a plurality of openings, the two pins being on a surface of the end cap, the plurality of openings being on the surface of the end cap and divided into two sets, and the two sets of the openings being symmetric to each other with respect to a plane passing through the two pins;

a power supply disposed in at least one of the end caps; and

an LED light strip on an inner surface of the glass tube forming a freely extending end portion at one end along a longitudinal direction of the glass tube, the freely extending end portion directly soldered to the power supply, the plurality of LED light sources being on the LED light strip.

20. The LED tube lamp according to claim 19, wherein the power supply comprises a current-limiting element, and the plurality of openings dissipate heat resulted from the power supply.

21. The LED tube lamp according to claim 20, wherein the plurality of openings are separately in a shape of an arc.

22. The LED tube lamp according to claim 20, wherein the surface of the end cap is vertical to the length direction of the glass tube.

23. The LED tube lamp according to claim 21, wherein the plurality of openings are in a shape of arcs with different sizes.

24. The LED tube lamp according to claim 23, wherein the sizes of the arcs of the plurality of openings gradually vary.

25. The LED tube lamp according to claim 20, wherein the plurality of openings are separately in a shape of a circle.

26. The LED tube lamp according to claim 25, wherein the number of the plurality of openings is three, and the three openings are arranged in a shape of an arc.

27. The LED tube lamp according to claim 20, wherein the plurality of openings are a combination in a shape of an arc and a circle.

28. The LED tube lamp according to claim 20, wherein at least a part of the openings are arranged along an arc and spaced apart from each other.

35. The LED tube lamp according to claim 19, wherein the LED light strip is a bendable circuit sheet.

36. The LED tube lamp according to claim 19, wherein the end cap comprises a metal part.

39. The LED tube lamp according to claim 20, wherein the current-limiting element comprises a resistor, a capacitor, an inductor, or any combination thereof.

40. The LED tube lamp according to claim 20, wherein the current-limiting element is configured for reducing EMI (electromagnetic interference).

41. The LED tube lamp according to claim 20, wherein the current-limiting element is an element of, or constitutes, a terminal adapter circuit.

42. The LED tube lamp according to claim 19, wherein the power supply comprises a rectifying circuit and a filtering circuit disposed in at least one of the end caps, and the plurality of openings are for dissipating heat from the power supply.

43. The LED tube lamp according to claim 19, wherein the power supply comprises a fuse connected to one of the two pins of one of the end caps, and the plurality of openings are for dissipating heat from the power supply.

49. The LED tube lamp according to claim 19, wherein the power supply further comprises a circuit board with two second bond pads.

50. The LED tube lamp according to claim 49, wherein each of the second bond pads comprises a through-hole.

51. The LED tube lamp according to claim 50, wherein the circuit board comprises an electrically insulating hole formed and disposed between the two second bond pads.

52. The LED tube lamp according to claim 19, wherein the power supply further comprises a circuit board with an electrically insulating hole.

53. The LED tube lamp according to claim 52, wherein the electrically insulating hole is formed and disposed near the edge of the circuit board.

54. The LED tube lamp according to claim 19, wherein the light bar comprises two first bond pads at a first end.

55. The LED tube lamp according to claim 54, wherein each of the first bond pads comprises a notch at an edge of the LED light bar.

56. The LED tube lamp according to claim 55, wherein at least one of the first bond pads is formed with a solder ball above the notch after soldering is completed, and a diameter of the solder ball is larger than a diameter of the notch.

57. The LED tube lamp according to claim 19, wherein the power supply further comprises a circuit board with a different width from the width of the light bar.

58. The LED tube lamp according to claim 19, wherein the power supply comprises a printed circuit board and the light bar comprises a bendable circuit sheet.

29. An LED tube lamp, comprising:

a glass tube;

a plurality of LED light sources;

two end caps respectively at two opposite ends of the glass tube;

a power supply in one of the end caps or separately in both of the end caps; and

an LED light strip on an inner surface of the glass tube forming a freely extending end portion at one end along a longitudinal direction of the glass tube, the freely extending end portion directly soldered to the power supply, the plurality of LED light sources being on the LED light strip;

wherein each of the end caps comprises;

an end wall;

two pins on the end wall; and

at least two openings on the end wall symmetric to each other with respect to a plane passing through the middle of a line connecting the two pins and perpendicular to the line connecting the two pins.

30. The LED tube lamp according to claim 29, wherein the at least two openings are separately in a shape of an arc.

37. The LED tube lamp according to claim 29, wherein the LED light strip is a bendable circuit sheet.

38. The LED tube lamp according to claim 29, wherein the end cap comprises a metal part.

44. The LED tube lamp according to claim 29, wherein the power supply comprises a current-limiting element disposed in at least one of the end caps, and the at least two openings are for dissipating heat from the power supply.

45. The LED tube lamp according to claim 44, wherein the current-limiting element comprises a resistor, a capacitor, an inductor, or any combination thereof.

46. The LED tube lamp according to claim 44, wherein the current-limiting element is configured for reducing EMI.

47. The LED tube lamp according to claim 29, wherein the power supply comprises a rectifying circuit and a filtering circuit disposed in at least one of the end caps, and the at least two openings are for dissipating heat from the power supply.

48. The LED tube lamp according to claim 29, wherein the power supply comprises a fuse connected to one of the two pins of one of the end caps, and the at least two openings are for dissipating heat from the power supply.

59. The LED tube lamp according to claim 29, wherein the power supply further comprises a circuit board with two second bond pads.

60. The LED tube lamp according to claim 59, wherein each of the second bond pads comprises a through-hole.

61. The LED tube lamp according to claim 60, wherein the circuit board comprises an electrically insulating hole formed and disposed between the two second bond pads.

62. The LED tube lamp according to claim 29, wherein the power supply further comprises a circuit board with an electrically insulating hole.

63. The LED tube lamp according to claim 62, wherein the electrically insulating hole is formed and disposed near the edge of the circuit board.

64. The LED tube lamp according to claim 29, wherein the light bar comprises two first bond pads at a first end.

65. The LED tube lamp according to claim 64, wherein each of the first bond pads comprises a notch at an edge of the LED light bar.

66. The LED tube lamp according to claim 65, wherein at least one of the first bond pads is formed with a solder ball above the notch after soldering is completed, and a diameter of the solder ball is larger than a diameter of the notch.

67. The LED tube lamp according to claim 29, wherein the power supply further comprises a circuit board with a different width from the width of the light bar.

68. The LED tube lamp according to claim 29, wherein the power supply comprises a printed circuit board and the light bar comprises a bendable circuit sheet.