US 2018/0124889 A1 · LED TUBE LAMP

Abstract

An LED tube lamp is disclosed. An installation detection circuit is configured in the LED tube lamp configured to receive an external driving signal. The installation detection circuit is configured to detect during one or more pulse signals whether the LED tube lamp is properly installed on a lamp socket, based on detecting a signal generated from the external driving signal. The installation detection circuit includes a switch circuit coupled to the pulse generating circuit, wherein the one or more pulse signals control turning on and off of the switch circuit. The installation detection circuit is further configured to: when it is detected during one or more pulse signals that the LED tube lamp is not properly installed on the lamp socket, control the switch circuit to remain in an off state to cause a power loop of the LED tube lamp to be open; and when it is detected during one or more pulse signals that the LED tube lamp is properly installed on the lamp socket, control the switch circuit to remain in a conducting state to cause the power loop of the LED tube lamp to maintain a conducting state.

Claims48

Dependent claims

A light-emitting diode (LED) tube lamp, comprising:

a lamp tube;
two end caps, each having at least one external connection terminal, and each coupled to a respective end of the lamp tube, wherein at least a first and second external connection terminal of the external connection terminals of the two end caps are for receiving an external driving signal;
a rectifying circuit, coupled to at least the first and second external connection terminals of the end caps, for rectifying the external driving signal to produce a rectified signal;
a filtering circuit, coupled to the rectifying circuit, for filtering the rectified signal to produce a filtered signal;
an LED module, disposed in a power loop of the LED tube lamp, coupled to the filtering circuit and configured to be driven based on the filtered signal for emitting light;
and
a light strip including a bendable circuit sheet positioned along an axial direction of the lamp tube and having two opposite ends detached from an inner surface of the lamp tube.

4 more elements

A light-emitting diode (LED) tube lamp, comprising:

a tube;
two end caps, each coupled to a respective end of the tube;
an LED light strip disposed inside the tube and mounted with a plurality of LED light sources;
and
a power supply module comprising a printed circuit board electrically connected to the LED light strip by soldering;
wherein the LED light strip comprises at least one first soldering pad at a first end of the LED light strip, and the printed circuit board of the power supply module comprises at least one second soldering pad corresponding to the first soldering pad of the LED light strip, and
wherein the LED light strip comprises a circuit layer, the LED light strip further comprises two opposite surfaces which are a first surface and a second surface, the first surface is a surface of the circuit layer, the second surface is a surface disposed on an inner circumferential surface of the tube, several LED light sources are disposed on the first surface and are electrically connected to the circuit layer, and
wherein the printed circuit board comprises two opposite surfaces which are a top surface and a bottom surface, the bottom surface faces the circuit layer of the LED light strip, and the at least one second soldering pad is a soldering pad disposed on the bottom surface of the printed circuit board, and
wherein the first surface of the LED light strip is connected to the bottom surface of the printed circuit board with a soldering material.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/835,273Filed 7 Dec 2017

Priority

CN 201410507660.928 Sep 2014

Published

3 May 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification34 codes

H05B 45/34
Driver circuits: voltage stabilisation; Maintaining constant voltage
F21K 9/27
Light sources comprising attachment means: retrofit light sources for lighting devices with two fittings for each light source, e.g. for…
F21K 9/272
Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes: details of end…
F21V 3/061
Characterised by the material: the material being glass

Family

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