LED tube lamp

• US 9,618,168 B1
• Filed: 07/15/2016
• Issued: 04/11/2017
• 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: Li, Liqin, Yang, Chang, Jiang, Tao, Xu, Hong
• Primary Examiner(s): TRAN, ANH Q
• Application Number:
  US15/211,717
• Publication Number:
  US 20170089530A1
• Time in Patent Office: 270 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 3/04 Heating appliances soldering lamps or blowpipes F23D; electric heating in general H05B
• CPC Class Codes: B23K 3/08 Auxiliary devices therefor cleaning pipes or tubes or systems of pipes or tubes, e.g. before soldering, B08B9/02
• 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 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• 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 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 3/049 Patterns or structured surfaces for diffusing light, e.g. frosted surfaces
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/10 characterised by coatings
• CPC Class Codes: F21V 7/24 characterised by the material
• 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, two end caps, a power supply, and an LED light strip. The glass tube includes a main body region, two rear end regions, and two transition regions connecting the main body region and the rear end regions. The end cap is disposed at one end of the glass tube and the power supply is provided inside the end cap. The LED light strip is disposed inside the glass tube and has LED light sources disposed thereon. The LED light strip includes a bendable circuit sheet mounted on inner surface of the glass tube. The bendable circuit sheet of the LED light strip is formed with a freely extending end portion at one end, and the freely extending end portion is electrically connected to the power supply. The glass tube and the end cap are secured by a hot melt adhesive.

Claims

1. 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 is formed with a rough surface and the roughness of the rough surface is higher than that of the outer surface, the glass tube also comprises a main body region, two rear end regions, and two two-arc-shaped transition regions connecting the main body region and the rear end regions;

two end caps disposed at two ends of the glass tube;

a power supply provided inside the end cap(s); and

an LED light strip disposed inside the glass tube and provided with a plurality of LED light sources disposed thereon;

wherein the LED light strip includes a bendable circuit sheet mounted on an inner surface of the glass tube to electrically connect the LED light sources with the power supply, the projected length of the bendable circuit sheet is larger than the length of the glass tube to form a freely extending end portion at one end of the bendable circuit sheet along a longitudinal direction of the glass tube, the freely extending end portion is electrically connected to the power supply, and the glass tube and the end cap are secured by a hot melt adhesive.

2. The LED tube lamp of claim 1, wherein the roughness of the rough surface is from 0.1 to 40 μ

m.

3. The LED tube lamp of claim 1, wherein the bendable circuit sheet comprises a circuit layer and a circuit protecting layer, the circuit protecting layer is disposed on the circuit layer.

4. The LED tube lamp of claim 1, wherein the rough surface is formed as a light scattering region.

5. The LED tube lamp of claim 4, further comprising a reflective film disposed on a part of the inner surface of the glass tube which is not formed with the rough surface.

6. The LED tube lamp of claim 5, wherein a ratio of a length of the reflective film disposed on the inner surface of the glass tube extending along the circumferential direction of the glass tube to a circumferential length of the tube is about 0.3 to 0.5.

7. The LED tube lamp of claim 1, wherein the power supply is in one end cap or divided into two parts respectively in the two end caps.

8. An LED tube lamp, comprising:

a glass tube covered by a heat shrink sleeve, the glass tube comprises a main body region, two rear end regions, and two transition regions narrowed down or tapering smoothly and continuously from the main body region to the rear end regions connecting the main body region and the rear end regions;

two end caps disposed at two ends of the glass tube;

a power supply provided inside the end cap(s); and

an LED light strip disposed inside the glass tube and provided with a plurality of LED light sources disposed thereon;

wherein the LED light strip includes a bendable circuit sheet mounted on an inner surface of the glass tube to electrically connect the LED light sources with the power supply, the projected length of the bendable circuit sheet is larger than the length of the glass tube to form a freely extending end portion at one end of the bendable circuit sheet along a longitudinal direction of the glass tube, the freely extending end portion is electrically connected to the power supply, and the glass tube and the end cap are secured by a hot melt adhesive.

9. The LED tube lamp of claim 8, wherein the thickness of the heat shrink sleeve ranges from 20 μ

m to 200 μ

m.

10. The LED tube lamp of claim 8, wherein the heat shrink sleeve is substantially transparent with respect to the wavelength of light from the LED light sources.

11. The LED tube lamp of claim 8, wherein the bendable circuit sheet comprises a circuit layer and a circuit protecting layer, the circuit protecting layer is disposed on the circuit layer.

12. The LED tube lamp of claim 8, further comprising a reflective film disposed on a part of the inner surface of the glass tube.

13. The LED tube lamp of claim 12, wherein a ratio of a length of the reflective film disposed on the inner surface of the glass tube extending along the circumferential direction of the glass tube to a circumferential length of the tube is about 0.3 to 0.5.

14. The LED tube lamp of claim 8, wherein the power supply is in one end cap or divided into two parts respectively in the two end caps.

15. An LED tube lamp, comprising:

a glass tube comprising a main body region, two rear end regions, and two transition regions narrowed down or tapering smoothly and continuously from the main body region to the rear end regions connecting the main body region and the rear end regions;

two end caps disposed at two ends of the glass tube;

a power supply provided inside the end cap(s), the power supply comprises a print circuit board; and

an LED light strip disposed inside the glass tube and provided with a plurality of LED light sources disposed thereon;

wherein the LED light strip includes a bendable circuit sheet mounted on an inner surface of the glass tube, the projected length of the bendable circuit sheet is larger than that of the glass tube to form a freely extending end portion at one end of the bendable circuit sheet along a longitudinal direction of the glass tube, the freely extending end portion of the bendable circuit sheet is electrically connected to the printed circuit board of the power supply.

16. The LED tube lamp of claim 15, wherein the power supply further comprises at least one electronic component disposed on one side of the printed circuit board, and the freely extending end portion is electrically connected to the printed circuit board through the other side.

17. The LED tube lamp of claim 16, wherein the bendable circuit sheet comprises a circuit layer and a circuit protecting layer disposed on the circuit layer.

18. The LED tube lamp of claim 17, wherein the circuit protecting layer of the freely extending end portion contacts the other side of the printed circuit board.

19. The LED tube lamp of claim 18, wherein the printed circuit board comprises a through hole, and the freely extending end portion comprises a notch corresponding to the through hole.

20. The LED tube lamp of claim 19, further comprising a soldering material penetrating the through hole and filling into the notch, so as to make the freely extending end portion be electrically connected to the printed circuit board.