KR101684384B1 - Afterglow protention circuit of LED lighting luminaire and the LED lighting luminaire consisting of them - Google Patents

Abstract

The present invention relates to an afterglow prevention circuit of an LED lighting apparatus and/or an LED lamp apparatus capable of preventing an afterglow phenomenon, which refers to a status in which an LED is flickered with a minute brightness caused by an induced electromotive force which is continuously supplied to the LED and serves as a micro electric current induced between a voltage terminal and the ceiling or a ground such as a wall surface when a DC electric current having a set-voltage supplied to the LED is shut off by the operation of a lighting switch, and an LED lighting apparatus and/or an LED lamp apparatus including the same. The afterglow prevention circuit (40) according to the present invention is installed on the LED lighting apparatus and/or the LED lamp apparatus, which includes: a DC converting unit (20) to rectify and convert AC electric current, which is supplied from at least one of voltage terminals among a neutral terminal (N) and voltage terminals (R, S, T) of a main power supply unit (10) through a first lead wire (L1) and a second lead wire (L2), into DC electric current having a set-voltage; an LED lighting unit (30) having at least one LED which is turned on/off by receiving the DC electric current having a set-voltage output from the DC converting unit (20); and a lighting switch (SW) to switch the first lead wire (L1). The afterglow prevention circuit (40) includes: at least one resistor element (R1, R2) to reduce the DC electric current having a set-voltage output from the DC converting unit (20) to the level of switching voltage; and an SCR switch (Q1) to connect the LED lighting unit (30) with the DC converting unit (20), which are in a disconnected state, when the switching voltage is detected.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an afterglow prevention circuit for an LED lighting fixture, and a LED lighting fixture including the LED lighting fixture,

The present invention relates to an afterglow prevention circuit for an LED lighting / LED lighting apparatus and an LED lighting / LED lighting apparatus including the same, and more particularly, And an LED lighting / LED lighting device afterglow prevention circuit which prevents the afterglow phenomenon in which the LED is supplied with a minute brightness, because the induction electromotive force, which is induced by the induced current between the ground and the ground, is continuously supplied to the LED And an LED lighting / LED lighting device configured by the LED lighting device.

Traditionally, incandescent lamps and fluorescent lamps were mainly used for luminaires installed on the ceiling or wall of an interior room.

However, the incandescent lamp has a disadvantage in that the incandescent lamp is inexpensive compared to a fluorescent lamp, has a very high power consumption, has a very large heating value, and has a short service life.

In addition, although the fluorescent lamp is expensive compared to an incandescent lamp, the fluorescent lamp has a low power consumption and a long service life. However, the fluorescent lamp is cut off due to its service life after a certain period of time.

In recent years, there has been proposed a luminaire using a LED (Ligft emitting diode) lamp which has a very low current consumption and a semi-permanent lifetime in comparison with a fluorescent lamp and is capable of emitting light close to natural light. In recent years, Is being actively promoted.

The LED having such an advantage is a power supply device (switching mode power supply, for example) that converts an AC current into a DC current of a set voltage and inputs the DC current to an LED lighting unit including LEDs, SMPS) additionally converts and supplies the alternating current into the direct current of the set voltage to light the LED.

1, the LED lamp 1 'is connected to the neutral terminal N and the voltage terminal S of the main power source 10 through the first lead L1 and the second lead L2, A DC converting unit (20) for rectifying and supplying the supplied AC current to a DC current of a set voltage; An LED lighting unit 30 having one or more LEDs supplied with a DC current of a set voltage outputted from the DC conversion unit 20; And a lighting switch (SW) for controlling the connection state of the first lead wire (L).

Here, the lead wire of any one of the first lead wire and the second lead wire is usually connected to the neutral node N of the main power source, and the remaining lead wire is connected to one of the R phase, the S phase, and the T phase, And the DC converting unit receives an alternating current of 220 V from the neutral terminal N and one of the voltage terminals R, S and T of the main power unit.

Therefore, when the first lead wire is connected by the lighting switch and the circuit is connected, the alternating current input through the neutral stage and the voltage stage is converted into the direct current of the set voltage through the DC converting unit, When the first lead wire is disconnected by the lighting switch, the connection of the circuit is cut off and the LED is turned off.

However, even if the first lead wire is disconnected by the lighting switch, the LED lamp may be connected to the ceiling or the wall surface of the building through the voltage terminal connected to the second lead wire. The induction electromotive force Ie which is a fine current flows between the grounding portions G and the induction electromotive force Ie induced by the induced electromotive force Ie causes the LEDs constituting the LED lighting portion 30 to be turned on at a low illuminance, Is inevitably generated.

When the after-lighting phenomenon occurs in which the LEDs constituting the LED lighting unit are lit at low illuminance, current is continuously consumed by the induction electromotive force, unnecessary current consumption occurs, and the life of each component constituting the LED lighting circuit On the other hand, it is difficult to take a comfortable sleep or rest, and users may complain about the afterglow phenomenon.

In order to prevent this phenomenon, most of the afterglow phenomenon is prevented by disposing the lighting switch disposed on the first lead wire drawn out from the neutral stage on the second lead wire drawn out from the voltage end.

However, since the majority of ordinary people do not have such electric expertise, a professional worker having a professional knowledge will come back to the site to move the light switch disposed on the first lead wire to the second lead wire, It causes unnecessary manpower and waste of time.

KR 10-2000-0000588 A KR 10-1040135 B1

It is an object of the present invention, which is devised to solve the above-described problems, to provide a method of driving a light emitting diode, in which a minute current induced between a voltage terminal and a grounding portion such as a ceiling or a wall surface, And a LED lighting / LED lighting device including the LED lighting device / LED lighting device's afterglow prevention circuit which is continuously supplied to prevent a afterglow phenomenon in which the LED is turned on with a minute brightness.

The above object is achieved by the following constitutions provided in the present invention.

In the LED lighting / LED lighting device according to the present invention,

An AC current supplied from one of the voltage terminals R, S and T of the neutral terminal N and the voltage terminal R of the main power source 10 is set through the first lead L1 and the second lead L2 A DC converting unit (20) for rectifying and rectifying the DC voltage into a DC current; An LED lighting unit 30 having one or more LEDs supplied with a DC current of a set voltage outputted from the DC conversion unit 20; And a lighting switch (SW) for switching the first lead line (L1). The LED lighting / LED lighting device (40)

The afterglow prevention circuit 40 includes one or more resistors R1 and R2 for reducing the direct current of the set voltage supplied from the DC converter 20 to a switching voltage, And an SCR switch (Q1) for connecting the part between the DC converter (20) and the DC converter (20).

Preferably, the afterglow prevention circuit 40 is provided with a capacitor C2 for delaying the switching voltage, which is reduced by the resistance elements R1 and R2 and supplied to the SCR switch Q1, To protect the SCR switch (Q1).

More preferably, the afterglow prevention circuit 40 is provided with a diode D1 disposed between the DC converting unit 20 and the LED lighting unit 30 to prevent backflow, and the induced electromotive force The LED lighting unit 30 and the DC converting unit 20 are reversed to prevent the afterimage phenomenon that the LED of the LED lighting unit 30 lights up with a minute brightness.

Meanwhile, the LED lighting / LED lighting device according to the present invention is characterized by including the afterglow prevention circuit according to the present invention.

As described above, the afterglow prevention circuit of the LED lighting / LED lamp according to the present invention is characterized in that, when a DC current of a set voltage is supplied from the DC conversion unit to the DC conversion unit and between the DC conversion unit and the LED lighting unit, And if the DC current of the set voltage is not supplied from the DC converting unit, the DC converting unit and the LED lighting unit are disconnected.

Therefore, when the input of the alternating current is interrupted by the lighting switch, the induced electromotive force, which is a microcurrent, is guided to the lighting circuit by the grounding part, and the afterimage phenomenon that the LED lighting part lights up with low illuminance by the induced electromotive force is prevented do.

Thus, the unnecessary current is consumed by the afterglow phenomenon, and the lifespan of each component constituting the LED lighting circuit is shortened, while the problems that it is difficult to take a comfortable sleep or rest can be solved.

Particularly, when a conventional afterglow spot is generated, a construction specialist revisits the site, and the disadvantage that labor and time are wasted by disposing the lighting switch disposed on the first lead wire on the second lead wire is solved.

1 is a block diagram showing a conventional LED lighting / LED lamp,
FIG. 2 is a block diagram showing an LED lighting / LED lamp with a afterglow prevention circuit according to the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of a LED lighting device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an LED lighting / LED lamp with a afterglow prevention circuit according to the present invention. FIG.

As shown in FIG. 2, the LED lighting / LED lighting apparatus 1 according to the present invention is provided in various LED lighting apparatuses such as an LED indoor lamp and an outdoor lamp provided with an LED lighting unit 30, And the LED is turned on.

As shown in FIG. 2, the LED lighting / LED lighting device 1 includes a neutral terminal N of the main power source 10 and a voltage terminal R of the main power source 10 through a first lead L1 and a second lead L2, S, and T) is rectified to a DC current of a predetermined voltage, and converts the rectified AC current into a DC current; An LED lighting unit 30 having one or more LEDs supplied with a DC current of a set voltage outputted from the DC conversion unit 20; And a switch (SW) for switching the first lead wire.

The LEDs are arranged in series or parallel to the substrate 31 to form the LED lighting unit 30. The lead wire L1 of any one of the first lead wire L1 and the second lead wire L2 is normally And the remaining lead line L2 is connected to the voltage terminal S of one of the voltage terminals R, S and T so that the neutral terminal N and one voltage terminal S are connected to the neutral terminal N, S).

The DC converter 20 for rectifying the AC current and converting the AC current into a DC current of a set voltage is formed of a bridge rectifier BD and is connected to the first and second lead wires L1 and L2 through an AC The current is rectified to a direct current and converted.

The smoothing capacitor C1 for smoothing the direct current through the charging and discharging of the rectified and rectified direct current is disposed in the direct current converting unit 20 so that the direct current current flowing through the smoothing capacitor C1, So that the DC current of the set voltage smoothed to the LED lighting unit 30 is continuously supplied.

That is, the smoothing capacitor C1 smoothens a direct current whose voltage is increased or decreased by a frequency through a charge and discharge operation, and supplies a direct current of a set voltage to the LED lighting unit 30, Keep it lit continuously without blinking.

Therefore, when the first lead line L1 disconnected by the lighting switch SW is connected and the circuit is connected, the alternating current inputted through the neutral stage N and one of the voltage stages R, S and T is DC converter 20 and is converted into a DC current of a set voltage and is converted and input to the LED lighting unit 30 in which the LEDs are arranged to turn on each LED.

When the first lead L1 is disconnected via the switch SW, the circuit formed between the neutral terminal N and one of the voltage terminals R, S and T is disconnected and the LED is turned off do.

In this embodiment, when the LED lighting / LED lighting device 1 is implemented, the first lead line L1 is disconnected by the lighting switch SW, and the voltage terminal S and the ceiling of the building Which is a microcurrent flowing between the voltage terminal S and the ground G, by preventing the induced electromotive force Ie, which is a microcurrent of a voltage induced between the ground G and the ground G, from flowing along the LED illumination, So that the LED of the LED lighting unit 30 is turned on at a low illuminance to prevent the afterglow phenomenon.

To this end, in the present embodiment, the afterglow prevention circuit 40 is disposed between the DC conversion unit 20 and the LED lighting unit 30 so as to be disposed between the voltage stage S and the grounding unit G So that a so-called afterglow phenomenon in which each LED of the LED lighting unit 30 is turned on at a low illuminance is prevented by the induced electromotive force which is a fine current flowing.

The afterglow prevention circuit 40 includes at least one resistance element R1 and R2 for reducing the direct current of the set voltage supplied from the DC conversion section 20 to a switching voltage, And an SCR switch (Q1) for connecting the circuit portion between the DC converter (30) and the DC converter (20).

In the present embodiment, the afterglow prevention circuit 40 is provided with a capacitor C2 for delaying the switching voltage, which is reduced by the resistance elements R1 and R2 and supplied to the SCR switch Q1, By causing the switching voltage to be temporarily delayed by the Denshi element C2 and then supplied to the SCR switch Q1, the SCR switch Q1 is protected by the initial switching voltage.

Therefore, when the first lead L1 is connected by the switch SW and an AC current is supplied from the main power supply 10 to the DC converter 20, the afterglow prevention circuit 40 performs the DC- DC converter unit 20 and the LED lighting unit 30 by a DC current provided from the LED unit 20.

That is, the DC converter 20 rectifies and converts an AC current into a DC current of a set voltage, and the DC current of the set voltage is converted by the resistance elements R1 and R2 constituting the afterglow prevention circuit 40 into a switching voltage And the SCR switch Q1 detects the decompressed switching voltage and connects the disconnected LED lighting unit 30 and the DC conversion unit 20. [

Thus, when the user connects the first lead L1 through the lighting switch SW, the LEDs constituting the LED lighting unit 30 are steadily lighted by receiving the direct current of the set voltage.

When the first lead L1 is disconnected by the lighting switch SW and the supply of the alternating current to the DC converting unit 20 is interrupted, the DC current of the set voltage stored in the smoothing capacitor C1 is supplied from the LED At the same time, the SCR switch (Q1) of the afterglow prevention circuit (40) disconnects between the DC conversion unit (20) and the LED lighting unit (30).

Thus, the LED lighting / LED lighting apparatus 1 including the afterglow prevention circuit according to the present invention is disconnected between the DC conversion unit 20 and the LED lighting unit 30 by the afterglow prevention circuit at the time of lighting off, The induced electromotive force Ie, which is a minute current between the LED illumination and the grounding portion, is supplied to the LED lighting unit 30 by the induction mechanism so that the afterglow phenomenon in which the LED is lit at low brightness can be prevented.

Also, in this embodiment, a diode D1 for preventing reverse flow is disposed between the DC converter 20 and the LED lighting unit 30.

This configuration prevents the afterimage phenomenon in which the LED of the LED lighting unit 30 is finely turned on while the induction electromotive force, which is the induced current, is circulated between the LED lighting unit 30 and the DC conversion unit 20 .

1. LED lighting / LED lighting fixture
10. Main Power N. Neutral Power
R, S, T. Voltage stage
L1. The first lead wire L2. The second lead wire
SW. Light switch
20. The DC-
BD. Bridge Stopper C1. Smoothing capacitor
30. LED Illumination 31. Substrate (PCB)
40. Afterglow prevention circuit
R1, R2. Resistor element C2. Capacitor device
Q1. SCR switch G. Ground terminal

Claims (4)

A first lead L1 connecting the neutral stage N of the main power supply unit 10 and the DC conversion unit 20 and a second lead L1 connecting the neutral point N of the main power supply unit 10 and the voltage terminal R, (20) for rectifying an AC current supplied from the main power supply unit (10) through a second lead wire (L2) connecting the step and the DC converter (20) to a DC current of a set voltage and converting the AC current into a DC current of a set voltage; An LED lighting unit 30 having one or more LEDs supplied with a DC current of a set voltage outputted from the DC conversion unit 20; And a light switch (SW) for switching the first lead line (L1)
The afterglow prevention circuit 40 includes one or more resistors R1 and R2 for reducing the direct current of the set voltage supplied from the DC converter 20 to a switching voltage, And an SCR switch Q1 for connecting the portion between the DC-DC converter 20 and the DC-DC converter 20, and a capacitor 29 for delaying the switching voltage, which is reduced by the resistance elements R1 and R2 and supplied to the SCR switch Q1 And a diode D1 which is disposed between the DC converting unit 20 and the LED lighting unit 30 and prevents reverse flow,
The afterglow prevention circuit 40 turns on the switch SW so that the DC conversion unit 20 and the LED lighting unit 30 are turned on by the SCR switch Q1 when the first lead L1 is connected, When the first lead line L1 is disconnected by turning off the light switch SW and the DC conversion unit 20 and the LED lighting unit 30 are turned on by turning off the SCR switch Q1, Wherein the afterglow prevention circuit prevents the afterglow phenomenon caused by the induced electromotive force. delete delete An LED lighting fixture comprising the afterglow prevention circuit according to claim 1.

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