LED tube lamp

Patent metadata

Field	Value
Publication number	US-9629215-B2
Application number	US-201615065890-A
Country	US
Kind code	B2
Filing date	Mar 10, 2016
Priority date	Sep 28, 2014
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

An LED tube lamp is disclosed. The LED tube lamp includes a tube, a terminal adapter circuit, a first rectifying circuit, a filtering circuit, an LED lighting module and an anti-flickering circuit. The tube has a first pin and a second pin for receiving an external driving signal. The terminal adapter circuit has two fuses respectively coupled to the first and second pins. The first rectifying circuit is coupled to the first and second pins for rectifying the external driving signal to generate a rectified signal. The filtering circuit is coupled to the first rectifying circuit for filtering the rectified signal to generate a filtered signal. The LED lighting module is coupled to the filtering circuit and the LED lighting module having an LED module, wherein the LED lighting module is configured to receive the filtered signal and generate a driving signal, and the LED module receives the driving signal and emits light. The anti-flickering circuit is coupled between the filtering circuit and the LED lighting module, and a current higher than a set anti-flickering current flows the anti-flickering circuit when a peak value of the filtered signal is higher than a minimum conduction voltage of the LED module.

First claim

What is claimed is:

1. An LED tube lamp, comprising:
a tube provided with a first pin and a second pin for receiving an external driving signal from one end of the tube;
a first rectifying circuit, coupled to the first and second pins for rectifying the external driving signal to generate a rectified signal, the first rectifying circuit including a terminal adapter circuit having two fuses respectively coupled to the first and second pins;
a filtering circuit, coupled to the first rectifying circuit for filtering the rectified signal to generate a filtered signal;
an LED lighting module coupled to the filtering circuit, the LED lighting module including an LED module, wherein the LED lighting module is configured to receive the filtered signal and generate a driving signal, and the LED module is configured to receive the driving signal to emit light; and
an anti-flickering circuit, coupled between the filtering circuit and the LED lighting module, wherein, the anti-flickering circuit is configured to, when a peak value of the filtered signal exceeds a minimum conduction voltage of the LED module, reduce flickering effect in light emission of the LED module by allowing flow of a current higher than a predetermined anti-flickering current to pass through the anti-flickering circuit,
wherein the LED module is formed on an LED light strip, and
wherein the LED light strip includes at least a first pad connected to the filtering circuit, and at least a through hole adjacent to the first pad.

2. The LED tube lamp of claim 1 , wherein the anti-flickering circuit comprises at least one resistor.

3. The LED tube lamp of claim 2 , wherein the rectifying circuit is a full-wave rectifying circuit.

4. The LED tube lamp of claim 1 , further comprising an over voltage protection circuit coupled to a first filtering output terminal and a second output terminal of the filtering circuit, wherein the over voltage protection circuit is configured to, when a voltage level of the filtered signal exceeds a predetermined over voltage value, detect the filtered signal for clamping the voltage level of the filtered signal.

5. The LED tube lamp of claim 4 , wherein the over voltage protection circuit comprises a voltage clamping diode.

6. The LED tube lamp of claim 1 , wherein a frequency of the external driving signal is an amount in the range of 20 k-50 k Hz.

7. The LED tube lamp of claim 1 , wherein the LED module comprises at least two LED units, and each LED unit comprises at least two LEDs.

8. The LED tube lamp of claim 1 , wherein the first and second pins are respectively disposed at two opposite end cap of the LED tube lamp to form a single pin at each end of LED tube lamp.

9. The LED tube lamp of claim 1 , further comprising a second rectifying circuit coupled to a third pin and a fourth pin for rectifying the external driving signal concurrently with the first rectifying circuit.

10. The LED tube lamp of claim 9 , wherein the first and second pins are disposed on one end cap of the LED tube lamp and the third and fourth pins are disposed on the other cap end thereof.

11. The LED tube lamp of claim 10 , further comprising a first filament-simulating circuit having filament-simulating terminals coupled to the first and second pins, and a second filament-simulating circuit having filament-simulating terminals coupled to the third and fourth pins.

12. An LED tube lamp, comprising:
a tube provided with a first pin and a second pin for receiving an external driving signal from one end of the tube;
a first rectifying circuit, coupled to the first and second pins for rectifying the external driving signal to generate a rectified signal;
a filtering circuit, coupled to the first rectifying circuit for filtering the rectified signal to generate a filtered signal;
an LED lighting module coupled to the filtering circuit, the LED lighting module having an LED module, wherein the LED lighting module is configured to receive the filtered signal and generate a driving signal, and the LED module is configured to receive the driving signal to emit light;
an anti-flickering circuit, coupled between the filtering circuit and the LED lighting module, wherein the anti-flickering circuit is configured to, when a peak value of the filtered signal exceeds a minimum conduction voltage of the LED module, reduce flickering effect in light emission of the LED module by allowing flow of a current higher than a predetermined anti-flickering current to pass through the anti-flickering circuit; and
an over voltage protection circuit, coupled to a first filtering output terminal and a second output terminal of the filtering circuit, wherein the over voltage protection circuit is configured to, when a voltage level of the filtered signal exceeds a predetermined over voltage value, detect the filtered signal for clamping the voltage level of the filtered signal,
wherein the LED module is formed on an LED light strip, and
wherein the LED light strip includes at least a first pad connected to the filtering circuit, and at least an opening formed on the first pad.

13. The LED tube lamp of claim 12 , wherein the anti-flickering circuit comprises at least one resistor.

14. The LED tube lamp of claim 12 , wherein the rectifying circuit is a full-wave rectifying circuit.

15. The LED tube lamp of claim 12 , wherein the over voltage protection circuit comprises a voltage clamping diode.

16. The LED tube lamp of claim 12 , wherein a frequency of the external driving signal is an amount in the range of 20 k-50 k Hz.

17. The LED tube lamp of claim 12 , wherein the LED module comprises at least two LED units, and each LED unit comprises at least two LEDs.

18. The LED tube lamp of claim 12 , further comprising a second rectifying circuit coupled to a third pin and a fourth pin for rectifying the external driving signal concurrently with the first rectifying circuit.

19. The LED tube lamp of claim 18 , wherein the first and second pins are disposed on one end cap of the LED tube lamp and the third and fourth pins are disposed on the other cap end thereof.

20. The LED tube lamp of claim 19 , further comprising two filament-simulating circuits, wherein one filament-simulating circuit has filament-simulating terminals coupled to the first and second pins, and the other filament-simulating circuit has filament-simulating terminals coupled to the third and fourth pins.

21. The LED tube lamp of claim 12 , further comprising two fuses, wherein one fuse is coupled to the first pin and the other fuse is coupled to the second pin.

22. The LED tube lamp of claim 12 , wherein the first and second pins are respectively disposed at two opposite end caps of the LED tube lamp to form a single pin at each end of LED tube lamp.

23. An LED tube lamp, comprising:
a filtering circuit configured to receive a rectified external driving signal and filter the rectified external driving signal to generate a filtered signal;
an LED lighting module coupled to the filtering circuit, the LED lighting module having an LED module, wherein the LED lighting module is configured to receive the filtered signal and generate a driving signal, and the LED module is configured to receive the driving signal to emit light; and
an anti-flickering circuit, coupled between the filtering circuit and the LED lighting module, wherein the anti-flickering circuit is configured to, when a peak value of the filtered signal exceeds a minimum conduction voltage of th

Assignees

• Jiaxing Super Lighting Electric Appliance Co Ltd
• Jiaxing Super Lighting Electric Appliance Co Ltd

Inventors

• Xiong Aiming
• Hu Hechen
• Ye Qifeng

Classifications

• F21V7/28

  characterised by coatings · CPC title

• H05B45/37

  Converter circuits · CPC title

• H05B45/50

  responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits · CPC title

• F21Y2101/00

  Point-like light sources · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title