LED tube lamp

• US 9,903,537 B2
• Filed: 02/29/2016
• Issued: 02/27/2018
• 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
• Primary Examiner(s): Alavi, Ali
• Application Number:
  US15/056,106
• Publication Number:
  US 20160178137A1
• Time in Patent Office: 729 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 glass lamp tube covered by a heat shrink sleeve with the thickness of the heat shrink sleeve being 20 μ

m to 200 μ

m, wherein at least a part of an inner surface of the glass lamp tube is formed with a rough surface and the roughness of the inner surface is higher than that of an outer surface of the glass lamp tube;

two end caps, each having at least one pin, and each coupled to a respective end of the glass lamp tube;

a power supply disposed in one of the end caps, or disposed in a separated manner in the two end caps; and

an LED light strip disposed inside the glass lamp tube with a plurality of LED light sources mounted on the LED light strip;

wherein the LED light strip has a bendable circuit sheet or a flexible circuit board which is made of a metal layer structure and mounted on the inner surface of the glass lamp tube to electrically connect the LED light sources with the power supply, the length of the bendable circuit sheet or flexible circuit board is larger than the length of the glass lamp tube, and the glass lamp tube and the end cap are secured by a highly thermal conductive silicone gel.

2. The LED tube lamp of claim 1, wherein the thermal conductivity of the highly thermal conductive silicone gel is not less than 0.7 w/m·

k.

3. The LED tube lamp of claim 1, wherein the thickness of the metal layer structure ranges from 10 μ

m to 50 μ

m.

4. The LED tube lamp of claim 3, wherein the metal layer structure is a patterned wiring layer.

5. The LED tube lamp of claim 1, wherein the roughness of the inner surface ranges from 0.1 to 40 μ

m.

6. The LED tube lamp of claim 1, wherein the glass lamp tube is coated with an anti-reflection layer with a thickness of one quarter of the wavelength range of light coming from the LED light sources.

7. The LED tube lamp of claim 6, wherein the refractive index of the anti-reflection layer is a square root of the refractive index of the glass lamp tube with a tolerance of ±

20%.

8. The LED tube lamp of claim 1, wherein the bendable circuit sheet or flexible circuit board has its ends extending beyond two ends of the glass lamp tube to respectively form two freely extending end portions.

9. The LED tube lamp of claim 1, further comprising one or more reflective films to reflect light from the plurality of LED light sources.

10. The LED tube lamp of claim 1, wherein the glass lamp tube comprises a diffusion film so that the light emitted from the plurality of LED light sources is transmitted through the diffusion film and the glass lamp tube.

11. The LED tube lamp of claim 1, wherein the glass lamp tube is covered with an adhesive film.

12. An LED tube lamp, comprising:

a glass lamp tube, wherein at least a part of an inner surface of the glass lamp tube is formed with a rough surface and the roughness of the inner surface is higher than that of the outer surface;

two end caps, each having at least one pin, and each coupled to a respective end of the glass lamp tube;

a power supply disposed in one of the end caps, or disposed in a separated manner in the two end caps; and

an LED light strip disposed inside the glass lamp tube with a plurality of LED light sources mounted on the LED light strip;

wherein the LED light strip has a bendable circuit sheet or a flexible circuit board mounted on an inner surface of the glass lamp tube to electrically connect the LED light sources with the power supply, the length of the bendable circuit sheet or flexible circuit board is larger than the length of the glass lamp tube, and the glass lamp tube and the end cap are secured by a highly thermal conductive silicone gel.

13. The LED tube lamp of claim 12, wherein the thermal conductivity of the highly thermal conductive silicone gel is not less than 0.7 w/m·

k.

14. The LED tube lamp of claim 12, wherein the thickness of the metal layer structure ranges from 10 μ

m to 50 μ

m.

15. The LED tube lamp of claim 14, wherein the metal layer structure is a patterned wiring layer.

16. The LED tube lamp of claim 12, further comprising one or more reflective films to reflect light from the plurality of LED light sources.

17. An LED tube lamp, comprising:

a glass lamp tube covered by a heat shrink sleeve;

two end caps, each having at least one pin, and each coupled to a respective end of the glass lamp tube;

a power supply disposed in one of the end caps, or disposed in a separated manner in the two end caps; and

an LED light strip disposed inside the glass lamp tube with a plurality of LED light sources mounted on the LED light strip;

wherein the LED light strip has a bendable circuit sheet or a flexible circuit board which is made of a metal layer structure and mounted on an inner surface of the glass lamp tube to electrically connect the LED light sources with the power supply, the length of the bendable circuit sheet or flexible circuit board is larger than the length of the glass lamp tube, and the glass lamp tube and the end cap are secured by a highly thermal conductive silicone gel.

18. The LED tube lamp of claim 17, further comprising one or more reflective films to reflect light from the plurality of LED light sources.

19. The LED tube lamp of claim 17, wherein the thickness of the metal layer structure ranges from 10 μ

m to 50 μ

m.

20. The LED tube lamp of claim 19, wherein the metal layer structure is a patterned wiring layer.