Light-emitting diode (LED) fluorescent lamp and connecting circuit thereof

Abstract

The embodiment of the invention discloses a light-emitting diode (LED) fluorescent lamp and a connecting circuit thereof. The LED fluorescent lamp comprises an LED fluorescent tube; the LED fluorescent tube comprises a first end cap and a second end cap, which comprise two pins respectively; a first inductor and a first bridge rectifier circuit are parallelly connected between the two pins of the first end cap; a second inductor and a second bridge rectifier circuit are parallelly connected between the two pins of the second end cap; a third inductor is serially connected between one pin of the first end cap and one pin of the second end cap; a forth inductor is serially connected between the other pin of the first end cap and the other pin of the second end cap; the output end of the first bridge rectifier circuit and the output end of the bridge rectifier circuit are parallelly connected with an LED lamp group which comprises an LED light source group and a circuit for supplying constant current and constant voltage. By the invention, the LED fluorescent lamp can be used for directly replacing a fluorescent lamp under the condition of no change of a peripheral circuit of the conventional fluorescent lamp.

Description

technical field [0001] The invention relates to the LED field, in particular to an LED fluorescent lamp and a fluorescent lamp connection circuit. Background technique [0002] Among traditional lighting sources, straight tube fluorescent lamps and circular fluorescent lamps have been widely used in commercial lighting, office lighting and home lighting. Such as figure 1 , figure 2 Shown are the circuit diagrams of two common fluorescent lamps at present. Such as figure 1 As shown, the first common fluorescent lamp circuit includes an electronic ballast and a fluorescent tube. The mains power (that is, commonly referred to as alternating current) is input from the input end of the electronic ballast, and is output after being converted by the electronic ballast. Two channels of direct current signals, one of which is simultaneously input to the two pin input terminals of one end cover of the fluorescent lamp, and the other channel of direct current signal is simultaneou...

AI Technical Summary

Problems solved by technology

[0011] Since fluorescent lamps have been widely used in daily life, brackets, lamp panels and peripheral circuits specially designed for fluorescent lamps have already been deployed in large quantities. If the peripheral circuits of fluorescent lamps that have been formed are changed in order to use LED fluorescent lamps, it will increase a lot of cost. , and waste a lot of resources

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