摘要:
An LED tube lamp comprises a lamp tube, a diffusive layer covered on a surface of the lamp tube, two end caps, a light strip, LED light sources on the light strip, and a power supply. Each of the two end caps is coupled to a respective end of the lamp tube. The light strip is attached to an inner circumferential surface of the lamp tube. The power supply module comprises a printed circuit board electrically connected to the light strip, a rectifying circuit and a filtering circuit coupled to the rectifying circuit. An end of the light strip is detached from the inner circumferential surface of the lamp tube and electrically connected to the printed circuit board.
摘要:
An LED tube lamp is disclosed. The LED tube lamp includes a lamp tube, a first external connection terminal and a second external connection terminal coupled to the lamp tube and for receiving an external driving signal, a rectifying circuit coupled to the first external connection terminal and the second external connection terminal and configured to rectify the external driving signal to produce a rectified signal, a filtering circuit coupled to the rectifying circuit and configured to filter the rectified signal to produce a filtered signal, an LED module coupled to the filtering circuit and configured to receive the filtered signal for emitting light; and a conduction-delaying circuit coupled to the rectifying circuit and comprising a conduction-delaying device, wherein the conduction-delaying circuit is configured such that when the external driving signal is initially input to the LED tube lamp, the conduction-delaying device is in an open-circuit state, and then the conduction-delaying device will enter a conducting state when voltage across the conduction-delaying device exceeds the conduction-delaying device's trigger voltage value, wherein the conducting state of the conduction-delaying device causes the LED module to conduct current for emitting light.
摘要:
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.
摘要:
A light-emitting diode (LED) tube lamp with overcurrent and/or overvoltage protection capabilities includes a lamp tube, a first rectifying circuit, a filtering circuit, an LED lighting module, and a protection circuit. The lamp tube has pins for receiving an external driving signal. The first rectifying circuit is for rectifying the external driving signal to produce a rectified signal. The filtering circuit is for filtering the rectified signal to produce a filtered signal. The LED lighting module includes an LED module, wherein the LED lighting module is configured to receive the filtered signal to produce a driving signal, and the LED module is for receiving the driving signal for emitting light. The protection circuit is configured to determine whether to enter a protection state, wherein upon entering the protection state, the protection circuit works to limit or restrain the level of the filtered signal.
摘要:
An LED light tube includes a glass tube, end caps, an LED light strip, LED light sources, and a power supply module. The end caps are respectively attached at two ends of the glass tube. The LED light strip is attached to an inner circumferential surface of the glass tube. The LED light sources are mounted on the LED light strip. The power supply module is electrically connected to the LED light strip. Each of the end caps includes a lateral wall and an end wall. The lateral wall is substantially coaxial with the glass tube and connected to the glass tube. The end wall is substantially perpendicular to an axial direction of the lateral wall and connected to an end of the lateral wall away from the glass tube. The power supply module includes a rectifying circuit and a filtering circuit electrically connected to the rectifying circuit.
摘要:
An LED tube lamp includes a tube having two ends, two end caps respectively at the two ends of the tube, a power supply module in one or both of the end caps, an LED light strip in the tube; and LED light sources on the LED light strip. Each of the end caps includes a lateral wall substantially coaxial with the tube and an end wall substantially perpendicular to an axial direction of the lateral wall. An axial direction of one or more openings of each of the end caps is substantially parallel with the axial direction of the lateral wall. The LED light sources are electrically connected to the power supply module via the LED light strip. The power supply module includes a fuse, and the fuse is positioned close to the end wall of the first end cap.
摘要:
An LED tube lamp comprises a glass tube, two end caps, an LED light strip inside the glass tube, a plurality of LED light sources on the LED light strip, a power supply module and an adhesive. The glass tube comprises a main body has an outer surface and two rear end regions respectively at two ends of the main body. The outer diameter of each of the rear end regions is less than that of the main body. Each of the end caps comprises a tubular wall sleeving over the respective rear end region and an end wall substantially perpendicular to the axial direction of the tubular wall and connected to an end of the tubular wall. The diameter of the outer surface of the main body is substantially the same as the diameter of the outer surface of the tubular wall. The power supply, comprises a rectifying circuit and a filtering circuit, is configured to drive the plurality of LED light sources. The adhesive is disposed between each of the inner surface of the tubular wall and the outer surface of each of the rear end regions.
摘要:
An LED tube lamp with overvoltage protection capability is provided. The LED tube lamp includes a lamp tube, two external connection terminals, a rectifying circuit, a filtering circuit, an LED module, and a protection circuit. The protection circuit is coupled between two input terminals of the LED module and configured to perform overvoltage protection when determining that a voltage level between the two input terminals of the LED module reaches or is higher than a predefined voltage value, wherein the protection circuit includes a diode and the predefined voltage value is in a range of about 40V to about 600V.
摘要:
An LED tube lamp includes a tube having two ends, two end caps respectively at the ends of the tube, a power supply in one or both of the end caps, an LED light strip in the tube; and a plurality of LED light sources on the LED light strip. Each of the end caps comprises a lateral wall substantially coaxial with the tube, an end wall substantially perpendicular to an axial direction of the lateral wall, and at least one opening penetrating through the end wall. An axial direction of the at least one opening is substantially parallel with an axial direction of the lateral wall. The LED light sources electrically connected to the power supply via the LED light strip.
摘要:
An LED tube lamp comprises a tube, an LED light strip inside the tube, a plurality of LED light sources on the LED light strip, a power supply, and a first and a second end caps. The power supply comprises a circuit board, a plurality of electronic components and a heat-dissipating element. The plurality of electronic components and the heat-dissipating element are on the circuit board. The first end cap and the second end cap are respectively attached at two ends of the tube. The first end cap comprises a lateral wall and an end wall having an opening. The lateral wall is substantially coaxial with the tube and connected to the tube. The end wall is substantially perpendicular to an axial direction of the lateral wall and connected to an end of the lateral wall away from the tube. At least some of the plurality of electronic components and the heat-dissipating element are disposed inside the first end cap. The heat-dissipating element is closer to the opening on the end wall of the first end cap than the electronic components in the end cap are.