LED tube lamp

• US 10,352,540 B2
• Filed: 02/20/2017
• Issued: 07/16/2019
• Est. Priority Date: 12/05/2014
• Status: Active Grant

• Current Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Original Assignee: Jiaxing Super Lighting Electric Appliance Co., Ltd.
• Inventors: Jiang, Tao, Li, Li-Qin, Xu, Hong
• Primary Examiner(s): Alavi, Ali
• Application Number:
  US15/437,084
• Publication Number:
  US 20170159894A1
• Time in Patent Office: 876 Days
• 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: 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 19/009 the support means engaging the vessel of the source
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• 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 23/023 Power supplies in a casing F21V23/003 takes precedence
• CPC Class Codes: F21V 25/04 breaking the electric circuit
• 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 3/0615 the material diffusing light, e.g. translucent glass
• CPC Class Codes: F21V 3/10 characterised by coatings
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• 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]

Abstract

An LED tube lamp including a glass lamp tube, an end cap disposed at one end of the glass lamp tube, a power supply provided inside the end cap, an LED light strip disposed inside the glass lamp tube with a plurality of LED light sources mounted on. At least a part of an inner surface of the glass lamp tube is formed with a rough surface, and the glass lamp tube is covered by a heat shrink sleeve. The LED light strip has a bendable circuit sheet which is made of a metal layer structure to electrically connect the LED light sources with the power supply. The glass lamp tube and the end cap are secured by a highly thermal conductive silicone gel with its thermal conductivity not less than 0.7 w/m·k.

Claims

1. An LED tube lamp, comprising:

a tube, comprising;

a main body; and

two rear end regions respectively at two ends of the main body, wherein an outer diameter of each of the rear end regions is less than that of the main body;

two end caps respectively sleeving the two rear end regions, each of the end caps comprising;

a metal ring member substantially coaxial with the tube, the metal ring member sleeving the respective rear end region;

an insulating end wall substantially perpendicular to the axial direction of the tube; and

two pins on the insulating end wall for receiving an external driving signal;

an LED light strip disposed on an inner circumferential surface of the main body with a plurality of LED light sources mounted thereon;

a power supply disposed at one end or two ends of the tube and configured to drive the plurality of LED light sources; and

an adhesive disposed between each of the metal ring members and each of the rear end regions;

wherein a rough layer is formed on the inner circumferential surface of the main body and the roughness of the rough layer is higher than that of the outer surface of the main body, so that the light emitted from the LED light sources passing through the rough layer and then through the main body.

2. The LED tube lamp of claim 1, wherein the LED light strip further comprises a mounting region and a connecting region, the plurality of LED light sources are mounted on the mounting region, the connecting region electrically connecting the plurality of LED light sources to the power supply.

3. The LED tube lamp of claim 2, wherein the mounting region is attached on the inner circumferential surface of the main body and the connecting region is detached from the inner surface of the tube to form a freely extending end portion.

4. The LED tube lamp of claim 3, wherein a portion of the freely extending end portion of the LED light strip is in the tube and another portion of the freely extending end portion of the LED light strip is extending beyond an end of the tube and into the end cap.

5. The LED tube lamp of claim 4, wherein the power supply comprises a circuit board, the circuit board being disposed in the end cap, the freely extending end portion of the LED light strip being directly soldered to the circuit board of the power supply.

6. The LED tube lamp of claim 2, wherein the power supply comprises a plurality of electronic components mounted on the connecting region.

7. The LED tube lamp of claim 6, wherein the LED light strip comprises a first wiring layer, a dielectric layer and a second wiring layer, the dielectric layer is disposed between the first wiring layer and the second wiring layer, the plurality of LED light sources are mounted on the first wiring layer.

8. The LED tube lamp of claim 7, wherein the second wiring layer is a piece of metal material and a thickness of the second wiring layer is great than the first wiring layer.

9. The LED tube lamp of claim 8, wherein the LED light strip further comprises a protective layer disposed on the first wiring layer.

10. The LED tube lamp of claim 1, wherein the LED tube lamp further comprises a diffusion film covering the outer surface of the main body, so that the light emitted from the LED light sources passing through the rough layer and then through the diffusion film.

11. The LED tube lamp of claim 10, wherein the LED tube lamp further comprises an adhesive film contained in-between the tube of glass and the diffusion film.

12. The LED tube lamp of claim 10, wherein the tube is a glass tube and the LED tube lamp further comprises an anti-reflection layer coated on the inner surface of the tube which is capable of reducing a reflection occurring at an interface between the glass lamp tube'"'"'s inner surface and air and allowing more light from the LED light sources transmitting through the glass lamp tube;

and wherein the light output from the LED light sources transmits through the anti-reflection layer, the rough layer, the diffusion film, and the tube.

13. An LED tube lamp, comprising:

a tube, comprising;

a main body; and

two rear end regions respectively at two ends of the main body;

two end caps respectively sleeving the two rear end regions, each of the end caps comprising;

a lateral wall substantially coaxial with the tube, the lateral wall sleeving the respective rear end region;

an end wall substantially perpendicular to the axial direction of the tube; and

two pins on the end wall for receiving an external driving signal;

an LED light strip disposed on an inner circumferential surface of the main body with a plurality of LED light sources mounted thereon;

a power supply comprising a circuit board and configured to drive the plurality of LED light sources, the circuit board disposed inside one of the rear end regions and one of the end caps;

an adhesive disposed between each of the lateral wall and each of the rear end regions; and

a diffusion film disposed on the glass lamp tube so that light emitted from the LED light sources passing through the inner surface of the glass lamp tube and then passing through the diffusion film on the glass lamp tube.

14. The LED tube lamp of claim 13, wherein a portion of the circuit board, one of the rear end regions, the adhesive and one of the lateral wall are stacked sequentially in a radial direction of the LED tube lamp.

15. The LED tube lamp of claim 14, wherein an outer diameter of each of the rear end regions is less than the outer diameter of the main body.

16. The LED tube lamp of claim 14, wherein the LED light strip further comprises a mounting region and a connecting region, the plurality of LED light sources are mounted on the mounting region, the connecting region electrically connecting the plurality of LED light sources to the power supply.

17. The LED tube lamp of claim 16, wherein the mounting region is attached on the inner circumferential surface of the main body and the connecting region is detached from the inner surface of the tube to form a freely extending end portion.

18. The LED tube lamp of claim 17, wherein the freely extending end portion of the LED light strip is directly soldered to the circuit board of the power supply.

19. The LED tube lamp of claim 14, wherein the LED light strip comprises a first wiring layer, a dielectric layer and a second wiring layer, the dielectric layer is disposed between the first wiring layer and the second wiring layer, and the plurality of LED light sources are mounted on the first wiring layer.

20. The LED tube lamp of claim 19, wherein the second wiring layer is a piece of metal material and the thickness of the second wiring layer is great than the first wiring layer.

21. The LED tube lamp of claim 20, wherein the LED light strip further comprises a protective layer disposed on the first wiring layer.

22. The LED tube lamp of claim 14, wherein the LED tube lamp further comprises an adhesive film contained in-between the glass lamp tube and the diffusion film.

23. The LED tube lamp of claim 14, wherein the LED tube lamp further comprises an anti-reflection layer coated on the inner surface of the tube.