Abstract: 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.

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein a lateral outline of the LED lamp detours around an axis of the LED lamp 360 degrees to turn around to form an contour of the LED lamp, any point on the outline me

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell; a power source having a first portion and a second portion; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working, and the first chamber is located between bottom of the LED lamp and an upper portion of the lamp neck; and a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink; wherein a lateral outline of the LED lamp detours around the axis of the LED lamp 360 degrees to turn around to form a contour of the LED lamp, the outline includes an out

Abstract: An LED (light emitting diode) lamp comprising: a lamp shell; a passive heat dissipating element having a heat sink connected to the lamp shell, wherein the heat sink comprises fins and a base; a power source disposed in the lamp shell; a light emitting element connected to the base of the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source; a first channel defined in a chamber of the lamp shell for dissipating heat generated from the power source while the LED lamp is working; and a second channel defined in the heat sink and between the fins and the base for dissipating the heat of the heat sink, which is generated from the LED chips and transferred to the heat sink; wherein the first channel comprises a first end on the light emitting element to allow air flowing from outside of the LED lamp into the chamber, and a second end on the upper portion of the lamp shell to allow air flowing from inside of the chamber out to the LED lamp; wherein th

Abstract: An LED lamp includes: a lamp shell; a passive heat dissipating element having a heat sink, wherein the heat sink comprises fins and a base; a power source; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips; a first heat dissipating channel formed in a first chamber of the lamp shell; a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink; and a lamp cover connected with the heat sink and having a light output surface and an end surface; wherein a chamber is formed between the light cover and the light emitting surface, and the light emitting surface and the LED chips are located in the chamber, the chamber has first apertures and second apertures, the first apertures are configured to communicate with the outside, and the second apertures are configured to communicate simultaneously with both the first heat dissipating channel and the second heat dissipating channel.

Abstract: An LED lamp includes: a lamp shell including a lamp head and a lamp neck, the lamp head connects to the lamp neck; a passive heat dissipating element having a heat sink connected to the lamp shell, wherein the heat sink comprises fins, a total height of the lamp neck and the lamp head is greater than a height of the heat sink; a power source disposed in the lamp shell; and a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips electrically connected to the power source.

Abstract: An LED tube lamp includes a lamp tube; an LED light strip disposed inside the lamp tube and comprising a mounting region and a connecting region, a plurality of LED light sources mounted on the mounting region and at least two first connecting pads arranged on the connecting region; a fixing structure disposed inside the lamp tube and extending along the longitudinal direction of the lamp tube, the fixing structure comprising a first end fixedly connected to an inner circumferential surface of the lamp tube and second end fixedly connected to the LED light strip; a power supply module disposed on the fixing structure and electrically connecting to the LED light strip via the two first connecting pads, the power supply module comprising a circuit board separate from the light strip and a plurality of electronic components mounted on the circuit board; and two end caps attached to two ends of the lamp tube respectively.

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink; a power source having a first portion and a second portion; and a light emitting surface comprising LED chips; wherein the sleeve of the lamp shell is made of a material having lower thermal conductivity than that of material of the heat sink; wherein the sleeve of the lamp shell is encircle covered by the heat sink, such that the second portion of the power source and the heat sink of the passive heat dissipating element are thermally insulated by the sleeve to prevent thermal effecting from the heat sink to the power source in the sleeve.

Abstract: An LED lamp includes: a lamp head; a passive heat dissipating element having a heat sink; a power source; a light emitting surface comprising LED chips electrically connected to the power source; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover; wherein the first heat dissipating channel comprises a first end and a second end; wherein the second heat dissipating channel comprises a third end on the light emitting surface; wherein the power source includes a power board and a plurality of electronic components mounted thereon; wherein the first heat dissipating channel includes an inner channel and an outer channel, a transformer of the electronic components includes a core and coils, the core has a second chamber in which the coils are disposed, an opening is formed at a side of the second chamber in a radial direction to expose the coils, the opening corresponds to the inner channel or the outer channel.

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve, the lamp head connects to the lamp neck which connects to the sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell, wherein the heat sink comprises fins and a base; a power source; a light emitting surface; a first heat dissipating channel formed in a first chamber of the lamp shell; a second heat dissipating channel formed in the heat sink and between the fins and the base; a lamp cover connected with the heat sink and having a light output surface and an end surface; wherein the base of the heat sink has a lower end located under the base, the lower end protrudes from the light emitting surface in an axis of the LED lamp; another side of the base of the heat sink, which is opposite to the lower end, has a back side, an end of each of the fins of the heat sink extends to connect with the back side, when the LED lamp is being hung, in an inward radial direction, the back side is upwardly sl

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve, the lamp head connects to the lamp neck which connects to the sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell, wherein the heat sink comprises fins and a base; a power source; a light emitting surface; a first heat dissipating channel formed in a first chamber of the lamp shell; a second heat dissipating channel formed in the heat sink and between the fins and the base; a lamp cover connected with the heat sink and having a light output surface and an end surface; wherein a third aperture is located in a central region of the light emitting surface, and the third aperture forms an air intake of both the first heat dissipating channel and the second heat dissipating channel; wherein the light emitting surface has an inner border and an outer border encircling the inner border, both the inner border and the outer border separately upward extend along the axial direction of the LED lamp t

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve, the lamp head connects to the lamp neck which connects to the sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell, wherein the heat sink comprises fins and a base; a power source; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips; a first heat dissipating channel formed in a first chamber of the lamp shell; a second heat dissipating channel formed in the heat sink and between the fins and the base; a lamp cover connected with the heat sink and having a light output surface and an end surface; wherein the light emitting surface includes three LED chip sets, each of the three LED sets has LED chips, the light emitting surface is divided into three areas comprising an inner ring, a middle ring and an outer ring, the three LED chip sets are respectively located in the inner ring, the middle ring and the outer ring, when at leas

Abstract: An LED lamp includes: a lamp shell; a passive heat dissipating element; a power source; a light emitting surface comprising LED chips; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover having a light output surface and an end surface, wherein the end surface is formed with a vent; wherein the first heat dissipating channel comprises a first end and a second end; wherein the second heat dissipating channel comprises a third end; wherein the first end is projected onto the end surface in an axis of the LED lamp to occupy an area on the end surface, which is defined as a first portion, another area on the end surface is defined as a second portion, and the vent in the first portion is greater than the vent in the second portion in area.

Abstract: An LED lamp includes: a lamp head; a passive heat dissipating element having a heat sink; a power source; a light emitting surface comprising LED chips electrically connected to the power source; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover; wherein the first heat dissipating channel comprises a first end and a second end; wherein the second heat dissipating channel comprises a third end on the light emitting surface; wherein the power board is divided into a first mounting zone and a second mounting zone, total weight of the electronic components on the second mounting zone is greater than total weight of the electronic components on the first mounting zone, the first mounting zone is provided with a counterweight to balance the two zones of the power board in weight.

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink; a power source; a light emitting surface; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover; wherein the sleeve has an upper portion and a lower portion, the upper portion is connected to the lower portion through an air guiding surface, a diameter of cross-section of the air guiding surface downward tapers off along the axis of the LED lamp.

Abstract: A driving method for driving an LED tube lamp is disclosed. The LED tube lamp includes a lamp tube, two end caps, an LED module, and a power supply module including an electric shock detection circuit. The driving method is capable of detecting whether a human touches the conductive part of the LED tube lamp when one end of the LED tube lamp has been inserted into a lamp socket.

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell, the heat sink comprises fins and a base; a power source; a light emitting surface connected to the heat sink of the passive heat dissipating element and includes LED chip sets having LED chips; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover connected with the heat sink and having a light output surface and an end surface, the end surface is formed with a vent to let air flow from outside of the LED lamp into both the first heat dissipating channel and the second heat dissipating channel through the vent.

Abstract: A ballast-bypass light-emitting diode (LED) tube lamp includes at least a first and second external connection terminal, the first and second external connection terminals respectively connected to opposite sides of the ballast by-pass LED tube lamp. The tube lamp includes an LED module, configured to emit light in response to a driving current, and a power supply module, electrically connected to the first and second external connection terminals for receiving an AC driving signal and configured to provide the driving current to the LED module. The power supply module comprises a rectifying circuit, a filtering circuit, a driving circuit, and a circuit electrically connected to the driving circuit and configured to operate in response to whether a foreign external impedance is connected to the LED tube lamp.

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell, the heat sink comprises fins and a base; a power source; a light emitting surface connected to the heat sink of the passive heat dissipating element and includes LED chip sets having LED chips; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover connected with the heat sink and having a light output surface and an end surface, the end surface is formed with a vent to let air flow from outside of the LED lamp into both the first heat dissipating channel and the second heat dissipating channel through the vent. The sleeve has an upper portion and a lower portion, the upper portion of the sleeve is connected to the lower portion of the sleeve through an air guiding surface, a diameter of cross-section of the air guiding surface downward tapers off along the axis of the LED lamp.

Abstract: An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell, the heat sink comprises fins and a base; a power source; a light emitting surface connected to the heat sink of the passive heat dissipating element and includes LED chip sets having LED chips; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover connected with the heat sink and having a light output surface and an end surface, the end surface is formed with a vent to let air flow from outside of the LED lamp into both the first heat dissipating channel and the second heat dissipating channel through the vent. A distance is kept between distal ends of the fins and the sleeve, and air exists in the distance between the fins and the sleeve of the lamp shell.