Light emitting diode lamp using alternating current voltage

Abstract

A light emitting diode lamp includes: a pair of first pins which are electrically connected to one another; a pair of second pins which are electrically connected to one another; a light emitting diode device module having one or more light emitting diode devices; a bridge diode which is electrically connected to the first pins and the second pins so as to be applied with external alternating current via the first pins and the second pins and converts the applied alternating current to direct current and is connected to both ends of the light emitting diode device module so as to supply the converted direct current to the light emitting diode device module; and one or more inductors which are provided between at least one of the pair of the first pins and the pair of the second pins and the bridge diode.

Description

technical field [0001] The present invention relates to a light-emitting diode lamp, and in particular to a light-emitting diode lamp that can be used by connecting directly to a common AC voltage without using a very expensive switching mode power supply (Switching Mode Power Supply, SMPS) that is required to operate a conventional light-emitting diode light. LED lights. Background technique [0002] Conventional fluorescent lamps are usually supplied with an alternating current of 90 to 1500V (peak voltage) to emit light. On the other hand, Light Emitting Diode (LED) lamps are devices that can replace such conventional fluorescent lamps and high-intensity discharge lamps, and DC current and the converted DC current is applied to the LED lamp to emit light. Likewise, conventional LED lights use SMPS as a power supply device to emit light. [0003] Since this LED lamp is a semiconductor using direct current, if the alternating current applied to the fluorescent lamp is ap...

AI Technical Summary

Problems solved by technology

[0008] However, LED lamps using this circuit are useful as a technology that excludes expensive SMPS, but it is difficult to be practically used due to certain problems.

[0009] First of all, when the voltage fluctuates between AC 90 to 120V, the output current (the output of the transistor constant current circuit) fluctuates greatly, so that the current applied to the LED device will change rapidly in response to the voltage change, and it is difficult to ensure the stability of the LED device reliability and its problem is that the power consumption changes according to the applied voltage

In addition, there is a flickering phenomenon in which LED lights are repeatedly turned on (ON) and turned off (OFF) in a very short period of time in the frequency range of about 50 Hz, so users of LED lights in this case feel dizzy or eyestrain

For this reason, it is difficult to practically apply it

[0010] Secondly, because it does not have a circuit for compensating power factor, its power factor and light efficiency are poor, and because the method for generating a constant current is unstable, although in a specific environment (AC 220V) the LED lamp is constructed as The power consumption level is 20W, but the power consumption becomes more than 27W when AC 225V is applied, so the LED lamp may be damaged

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