KR101267957B1 - Apparatus for control of led lamp - Google Patents

Abstract

The present invention is a LED lighting control device, by rectifying the AC input power supply voltage to switch the light emitting diode array having a tap (TAP) structure differently according to the input voltage level, high efficiency, high power factor, low frequency characteristics, circuit and structure Its purpose is to use an AC input power source with the characteristics of simplicity.
SUMMARY OF THE INVENTION An object of the present invention is to provide an LED lighting control device including an LED array unit and an LED control unit for controlling the point and turn-off of each LED of the LED array unit, wherein the LED array unit is connected in parallel to the line voltage from the rectifying unit, and the plurality of LEDs. And a plurality of LED groups connected in parallel, with tabs formed between the LED groups, and an LED control unit configured to switch on / off each tab of the LED array unit; A power supply switching unit for switching the line voltage from the rectifying unit and the power supply of the LED control unit from the respective tabs of the LED array unit to be supplied differently according to the line voltage level according to the output of the signal control unit; A line voltage detector detecting a line voltage applied from the rectifier; A comparison unit comparing the reference voltage of the line voltage detection unit; A signal controller for controlling the power supply switching unit and the current controller according to the output signal of the comparator; And a current controller for controlling a maximum current for controlling the tap switching unit according to the control signal of the signal controller.

Description

LED lighting controller {Apparatus for Control of LED Lamp}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode (hereinafter referred to as LED) lighting device using an AC input power source, and more particularly, to a light emitting diode array having a TAP structure according to an input voltage level by rectifying an AC input power supply voltage. The present invention relates to an LED lighting control device using an AC input power source that features high efficiency, high power factor, low frequency characteristics, and simplicity of circuit and structure by switching differently.

In general, lighting devices require high efficiency, high power factor, and low frequency electrical characteristics in the commercialization market, as well as high lifespan, low cost, simplification of parts, simplicity of production, and environmental friendliness.

According to the requirements of the market, lighting designers are responding to the changing lighting market by using various light sources, and the LED lighting market is expanding and gaining popularity due to various advantages of the LED light source among a wide range of lighting devices.

The basic control method for implementing LED lighting device can be divided into voltage control method and current control method.

The voltage control method is a method of controlling the amount of light emitted by controlling the voltage across the LED consisting of one or more LEDs. The current control method is a method of controlling the amount of light emitted by controlling the current flowing through the LED. Due to the characteristics of the LED, it has a large current change characteristic with a small voltage change across the LED in the forward direction. In addition, since the voltage characteristics change a lot with temperature, the LED lighting device generally uses a current control method.

1 is an example of a basic voltage control method using an AC input power source according to the prior art, a method of detecting the voltage across the LED to control the output voltage in comparison with the reference voltage. AC TO DC conversion circuits range from simple smoothing to complex circuits using PFC ICs.

A simple smoothing circuit using a capacitor has a disadvantage in that it is difficult to make a high power factor lighting device. When using a PFC IC, the power factor is good, but the circuit is complicated and requires many parts.

In the case of the linear method among the methods of controlling the output voltage, the input voltage has to be larger than the output voltage, and power loss occurs in the linear element, resulting in a decrease in efficiency.

In the case of the switching method, the efficiency is improved, but there are disadvantages in that the circuit is complicated, high frequency characteristics are generated, and the price is expensive. In addition, the voltage control method has a disadvantage in that the brightness of the lighting device is changed when the heating of the lighting device because the current characteristics at the same output voltage changes a lot when the LED array.

2 is a block diagram showing an example of a basic current control method using an AC input power according to the prior art, the current control method is a method for controlling the current flowing in the LED array by detecting a current flowing in the LED array to be.

The advantage of such a current control method is that it is easier to control due to the electrical characteristics of the LED than the current control method, and there is an advantage that the brightness change of the lighting device is small since the current change is small even when the LED array generates heat.

 Figure 3 is a block diagram of a current control lighting device using a switching method commonly used AC input power, the current flowing through the LED array is voltage-converted through the current sensor resistor and the reference of the converted voltage and operational amplifier The output voltage is controlled compared to the voltage, and consequently the current in the LED array is controlled.

Such a switching type lighting device has the advantage of having high efficiency characteristics, but because of the complicated circuit and the large part price, it is widely used for relatively large power and expensive lighting device.

Figure 4 is a graph showing an embodiment of the basic voltage, current characteristics of the LED, the important factors to be considered in the lighting device power efficiency, light efficiency, power factor (PF), EMI, EMC, lifetime of the lighting device, price, The simplification of components, the stability and the emotional sensation of lighting, and the lighting designers consider the various factors to design the lighting device.

The present invention rectifies the AC input power supply voltage to switch the light emitting diode array having a tap (TAP) structure differently according to the input voltage level, thereby providing high efficiency, high power factor, low frequency characteristics, AC characteristics characterized by simplicity of circuit and structure. It is an object of the present invention to provide an LED lighting control device using an input power source.

LED lighting control device for achieving the object of the present invention is controlled by the line voltage supplied from the rectifying unit for full-wave rectifying the supplied AC power, the LED array unit, and the point, the light off of each LED of the LED array unit In the LED lighting control device consisting of an LED control unit, wherein the LED array unit is connected in parallel to the line voltage from the rectifying unit, a plurality of LEDs are composed of a plurality of LED groups (DG1 ~ DGN) connected in parallel, the Taps (TAP 1 to TAP N) are formed between each LED group (DG1 to DGN), and the LED control unit includes: a tap switching unit for switching on / off each tap (TAP 1 to TAP N) of the LED array unit; A power supply switching unit for converting and switching the power supply path of the LED control unit to be supplied by selecting one of the line voltage and each of the taps according to the voltage level of the line voltage supplied from the rectifying unit; A line voltage detector detecting a line voltage applied from the rectifier; A comparison unit comparing the reference voltage of the line voltage detection unit; A signal control unit controlling the power supply switching unit and the current control unit according to the output signal of the comparison unit; And a current control unit controlling the tap switching unit to be turned on / off according to a control signal of the signal controller and controlling a maximum current of the tap switching unit.

A current detector added between the tap switching unit and the signal control unit and detecting a current flowing in the tap switching unit; And a protection circuit unit for detecting an overcurrent, an overvoltage, or an over temperature from the current detection unit, and controlling the signal control unit according to a detection result to protect each subcircuit.

The rectifier includes a bridge circuit for full-wave rectifying and outputting AC power.

LED lighting control device according to the present invention is a capacitor, the difficulty of the efficient design of the lighting device brought about by the complexity of the circuit and the excessive use of the components and the capacitor of the LED lighting device control means, the size increase by the use of the inductor, High efficiency, high power factor, long life, component simplification and low cost can be achieved over a wide range of AC input voltage without using inductor.

Further, according to the present invention, the switching element of the tap switching unit is configured in parallel with the tap of the LED array so as to efficiently switch the LED according to the line input voltage so as to consume low power of the control device. By minimizing the power consumption of the lighting device it is possible to increase the efficiency of the lighting device.

In addition, according to the present invention, by configuring the LED array so that the line input power voltage waveform and the current waveform of the LED is approximated, there is an effect that can realize a high power factor of the LED lighting device.

In addition, according to the present invention, it is possible to adjust the maximum current flowing in the LED according to the voltage level of the line voltage according to the setting value of the current control unit to implement a high power factor of the LED of the LED lighting control device.

In addition, according to the present invention, by realizing the power supply of the power supply unit to be supplied through the line voltage and different taps according to the level of the input power voltage through the power supply switching unit to minimize the power consumption of the entire LED lighting control device by realizing The efficiency of this lighting device is maximized.

1 is a block diagram of an LED lighting control device showing an example of a basic voltage control method using an AC input power source.
2 is a block diagram of an LED lighting control device showing an example of a basic current control method using an AC input power source.
3 is a block diagram of a current control lighting apparatus using a switching method that is most commonly applied using an AC input power source.
4 is a diagram illustrating an example of basic voltage and current characteristics of a light emitting diode (LED).
5 is a view showing an LED lighting control device using an AC input power source according to a preferred embodiment of the present invention.
FIG. 6 illustrates a line voltage obtained by rectifying one cycle of an AC voltage having an AC input voltage of 220V.
7 is a diagram illustrating an output waveform of a line voltage detector.
8 is a timing diagram of each block.
Fig. 9 shows an example of the VI characteristics of each group of the single light emitting diode VI characteristics and the N series grouped light emitting diode array portions.
FIG. 10 is a view illustrating a current characteristic of the light emitting diode array unit in each section, constituting the light emitting diode array unit having the characteristics of FIG. 9.
11 is a diagram illustrating input voltage characteristics of a power supply voltage supply unit in each line voltage section.
12 is a diagram illustrating voltage, current, and power characteristics when a power source input to a power voltage supply unit receives only a line voltage.
FIG. 13 is a diagram illustrating characteristics when the maximum current limit of each current controller is implemented differently.
14 is a diagram illustrating a voltage current characteristic set to provide overvoltage protection when 10% overvoltage is applied.

Referring to the configuration and operation of the LED lighting control device according to an embodiment of the present invention in detail with reference to the accompanying drawings as follows.

FIG. 5 is a block diagram of an LED lighting control device according to an embodiment of the present invention, wherein the bridge circuit 101 for full-wave rectifying and converting the supplied AC power is turned on by the line voltage supplied from the bridge circuit 101. The LED array unit 110, and the LED control unit 120 for controlling the point, the light off of each LED of the LED array unit 110.

The LED array unit 110 is connected in parallel to the line voltage from the bridge circuit 101, and consists of a plurality of LED groups (DG1 ~ DGN) connected in parallel, a plurality of LEDs, each LED group ( Taps TAP 1 to TAP N are formed between DG1 to DGN.

The LED controller 120 detects a tap switching unit 140 for switching on / off each tap (TAP 1 to TAP N) of the LED array unit 110 and a current flowing through the tap switching unit 140. A current detecting unit 151, a protection circuit unit 152 for detecting an overcurrent, an overvoltage or an over temperature from the current detecting unit 151, and generating a control signal for protecting each circuit according to the detection result; A power supply switching unit 131 for switching and switching the supply power supplied to the control unit 120 to be supplied from each tap of the lLEDdjfpdlqn110 with the line voltage supplied from the bridge circuit 101, and the LED control unit 120 A power supply unit 132 for supplying driving power to the power supply unit, a line voltage detector 133 for detecting a line voltage applied from the bridge circuit 101, and a comparison unit for comparing the reference voltages of the line voltage detector 133 with each other. 170, the output signal and the beam of the comparison unit 170 A signal controller 170 controlling the power supply switching unit 131 and the current controller 190 according to a control signal of the circuit unit 152, and the tap switching unit 140 according to a control signal of the signal controller 180. ) And a current control unit 190 for controlling the maximum current of the tap switching unit 140.

The tap switching unit 140 is composed of each tap switch 1 to 3 connected in parallel between each tap (TAP 1 to 3) and the current detection unit of the LED array unit 110, each tap switch is a current control unit ( 190 is controlled to control.

The comparator 170 is configured with comparators 1 to 3 to control the respective taps TAP 1 to 3, and comparators reference voltages 1 to 3 for setting the reference voltages of the comparators 1 to 3 are the comparators 1 to 3. It is set differently according to each, and it is configured to be changeable.

The signal controller 10 controls each current controller 1 to 3 of the current controller 190 according to an output signal from each of the comparators 1 to 3 of the comparator 170 or a control signal from the protection circuit unit 152. Each signal controller 1 to 3 is controlled.

The current controller 190 controls on / off of each of the tap switches 1 to 3 of the tap switching unit 140 by a control signal of the signal controller 180, and controls the maximum current of each of the tap switches 1 to 3. The current controllers 1 to 3 correspond to the tap switches 1 to 3 one to one so as to control the maximum current of the LED array unit 110 by controlling.

The operation of the LED lighting control device according to the embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 5 to 15.

5 is a block diagram of the LED lighting control device according to an embodiment of the present invention, the bridge circuit 101 is a line voltage for supplying power to the LED lighting device of the present invention by full-wave rectifying the commercial AC power (AC) Output

The LED array unit 110 is turned on by the output line voltage of the bridge circuit unit 101, each LED group grouped into one group by connecting one or more LEDs in series and parallel to a plurality (DG1 ~ DG3) It is composed.

The plurality of n LED groups DG1 to DGn grouped in this way are connected in series, and have a single tap structure between each group and the group connected in series.

For example, the tap TAP1 is formed between the LED group DG1 and the LED group DG2, and the tap Tn n-1 is formed between the LED group DG n-1 and the LED group DG n. The cathode terminal of the last LED group DG n is formed with a tap TAP n. In this way, n taps TAP 1 to n are formed in the n LED groups DG 1 to n.

Here, the LED group DG may be configured as a plurality (n), and in the present invention, three LED groups DG1 to DG3 and respective taps TAP1 to TAP3 will be described as an embodiment.

The LED array unit 110 is a diagram showing the LED VI characteristics of the LED array unit 110, as shown in Figure 4, the turn-on voltage, voltage, current characteristics of the LED is determined by the combination of the parallel and parallel LED. .

The current detector 151 detects a current of the LED array unit 110 flowing through the tap switching unit 140 connected in parallel with the LED array unit 110.

The tap switching unit 140 is composed of three tap switches 1 to 3 connected in parallel between the three taps TAP1 to TAP3 of the LED array unit 110 and the current detection unit 151, respectively. The on / off and maximum current are determined by the current controllers 1 to 3.

The current controller 190 controls each tap switch 1 to 3 to be turned on / off individually according to the control signal of the signal controller 180, and controls the maximum current of each tap switch 1 to 3 to provide an LED array unit. Each current controller 1 to 3 connected to each of the tap switches 1 to 3 is configured to control the maximum current flowing through each of the taps TAP1 to TAP3 of the 110.

Each of the signal controllers 1 to 3 of the signal controller 180 controls each of the current controllers 1 to 3 and the power supply switching unit 131 by the outputs of three different comparators 1 to 3, respectively. Is done.

The comparator 170 includes comparators reference voltages 1 to 3 set differently from the respective signal controllers 180 and the comparators 1 to 3 for comparing and outputting the outputs of the line voltage detector 133.

The comparator reference voltage units 160 are set to different comparator reference voltages 1 to 3 corresponding to the comparators 1 to 3.

The line voltage detector 133 detects the line voltage AC110 to 220V of the high voltage rectified by the bridge circuit 101 to drop the voltage and input the comparators 1 to 3.

The power supply switching unit 131 performs a switching role such that the power supply unit 132 is connected to a line voltage and different taps TAP1 to TAP3 according to the output of each signal controller 180.

The power voltage supply unit 132 includes the power supply switching unit 131 to supply driving power to each circuit of the present invention.

6 is a diagram illustrating a line voltage rectified by one cycle of an AC voltage having an AC input voltage of 220 V rectified by the bridge circuit 101, and FIG. 7 is a voltage output waveform detected by the line voltage detector 133 in FIG. 5. Indicates.

가 되며, 상기 라인전압검출부(133)에 의해 1/100로 전압강하할 경우 라인전압검출부의 피크전압은 3.11V가 된다. The peak voltage of the line voltage rectified by the bridge circuit 101 is

When the voltage drops to 1/100 by the line voltage detector 133, the peak voltage of the line voltage detector is 3.11V.

In addition, the reference voltage sources 1 to 3 of each of the comparators 1 to 3 are set to one embodiment so as to be the following Equation 1 and the operation is described as follows.

As shown in FIG. 7, when the AC voltage of the bridge circuit 101 is full-wave rectified, the operation of each voltage section is described. In the section where the line voltage is 0 to 103.7V, the reference voltage of the comparator 1 is 1.04. When V is detected and the detection voltage of the line voltage detector 133 is input to the inverting terminal of the comparator 1, the comparator 1 output is in a high state.

In addition, the outputs of the comparator 2 and the comparator 3 are also in a HIGH state.

In this case, when the outputs of each of the comparators 1 to 3 are all high, the signal controller 180 may turn on the tap switch 1 of the tap switch 140 to switch the tap TAP1. To control.

In addition, the tap switches 2 and 3 of the tap switching unit 140 respectively control the current controllers 2 and 3 to be in an OFF state. Accordingly, the LED group DG1 emits light, and the current path flows through the LED group DG1 and the tap TAP1, and the tap switch 1 and the current detector 151.

In addition, at this time, the power supply switching unit 131 controls the power supply switching unit 131 to receive power from the line voltage, and the connection between the power supply unit 132 and the taps TAP1 and TAT2 is turned off.

Subsequently, in the section where the line voltage is 103.7 V to 207.3 V, the comparator 1 sends a low output and the comparator 2 and comparator 3 outputs become high. In this case, the signal controller 180 controls the current controller 2 so that the tap switch 2 of the tap switching unit 140 for switching the tap 2 (TAP2) is turned on.

At this time, the tap switch 1 and the tap switch 3 control the current controller 2 and the current controller 3 to be in an OFF state.

Accordingly, current flows through the LED groups DG1 and DG2, the tap 2 (TAP2), the tap switch 2, and the current detector 151, and the LED groups DG1 and DG2 emit light.

Also, in this voltage section, the power supply unit 132 controls the power supply switching unit 131 to receive power from the tap 1 (TAP1), and the connection between the power supply unit 132 and the line voltage and the tap 2 (TAP2) Turn it off.

In the section where the line voltage is 207.3 V to 311 V, the comparator 1 and the comparator 2 output a low output, and the comparator 3 outputs a high. In this case, the signal controller 180 controls the current controller 3 to turn on the tap switch 3 of the tap switching unit 140 for switching the tap 3 (TAP3).

Also, at this time, the tap switch 1 and the tap switch 2 control the current controller 1 and the current controller 2 to be in an off state. Accordingly, the current flows through the LED groups DG1, DG2 and DG3, the tap 3, the tap switch 3, and the current detector 151, and the LED groups DG1, DG2 and DG3 emit light.

Also, in this voltage section, the power supply unit 132 controls the power supply switching unit 131 to receive the power voltage from the tap 2 (TAP2), and connects the power supply unit 132 to the line voltage and the tap 1 (TAP1). Should be off.

Subsequently, when the line voltage decreases, the same operation is performed in reverse order.

Through this process, the LED groups DG1 to DG3 emit light according to the voltage level of the line voltage during AC input.

In the above operation period, the power consumption of the LED control unit 120 except for the LED array 110 is generated in the switching element of the tap switching unit 140 and the components of the control circuit.

The present invention is characterized in that each tap switching unit 140 connected to each tap (TAP1 ~ TAP3) of the grouped LED groups (DG1 ~ DG3) in a parallel structure, each tab (TAP1 ~ TAP3) due to this structure At the time of switching, only one tap switch connected to the tap and the current detector 151 is kept on, thereby minimizing power consumption in the switching device.

FIG. 8 is a timing diagram of each block, and illustrates timing charts of the comparators 1 to 3 of the comparator 170 and the tap switches 1 to 3 of the tap switching unit 140 according to the input AC power.

FIG. 9 shows an example of the V-I characteristics of a single LED and the V-I characteristics of each group of LED array units in which N LEDs are connected in series.

FIG. 10 illustrates the LED array unit having the V-I characteristic of FIG. 9 and shows current characteristics of the LED array unit in each section.

11 shows input voltage characteristics of the power supply unit in each line voltage section.

12 shows voltage current and power consumption characteristics when a power source input to a power supply unit is supplied at a line voltage and when the power source is supplied by the method of the present invention.

In the present invention, by varying the power source input to the power supply unit 132 for each line voltage section, it is configured to minimize power consumption in the power supply device.

That is, the power supply unit 132 has an effect of significantly reducing the power consumption of the control circuit than when the power supply to the LED control unit 120 through the line voltage.

In the case of the LED lighting device having the three-tap (TAP1 to TAP3) structure described above, if the current consumption in the LED control unit 120 is constant, the same power is consumed in the range of 0 to 104 V, and the line is in the range of 104 to 207 V. The power consumption is reduced by half than when powered directly from voltage.

Likewise, it is reduced to 1/3 in the 207 ~ 311V range. The characteristic of the power supply method of the present invention is to implement the power consumption by the LED control unit 120 by section by varying the path to receive power for each section even if the line voltage is increased.

This minimizes the power consumption in the control circuit other than the LED to maximize the efficiency of the LED lighting device according to the present invention.

As shown in FIG. 12, when the power is supplied at the line voltage and when the power is supplied by the power supply 132, the power consumption decreases by the colored portion. This minimizes the power consumption other than the LED, thereby maximizing the efficiency of the LED lighting device can achieve a high efficiency lighting device.

Each of the current controllers 190 serves to limit the maximum current of the LED as well as the switching of the tap switching unit 140.

In addition, as shown in FIG. 13, the configuration of each LED group DG1, DG2, and DG3 is the same, and the maximum current of each current control unit is set to be 'current controller 3> current controller 2> current controller 1'. This is an example of a method of implementing a high power factor by adjusting the maximum current according to the voltage section of the line voltage.

Experimentally, each LED group (DG1 ~ DG3) is configured in the same way, the maximum current of each current controller 1 to 3 is configured to be the same, even if a 20W class LED lighting device is configured to achieve a power factor of 0.95 or more The high power factor lighting system was implemented.

In addition, when the maximum current of each of the current controllers 1 to 3 as described above it was possible to implement a high power factor lighting device with a power factor of 0.97 or more. This characteristic satisfies the luminaire specification.

The current detection unit 151 and the protection circuit unit 152 detects an overcurrent of the LED and turns off all the tap switching units 140 when the current is greater than the set current, thereby performing a protection function to prevent destruction of the lighting device due to the overcurrent. do.

In addition, in the present invention, when the line voltage is input over the design value, the current limit is configured according to the set value of the current control unit 190.

For example, if the AC input voltage of the bridge circuit 101 is 230V, the output of each of the comparators 1 to 3 becomes LOW in a section in which the line voltage is 311V or more, and the signal controller 180 protects the overvoltage. To control the respective current control unit 190 so that each tap switch 1 to 3 of the tap switching unit 140 for switching each tap (TAP1 ~ TAP3) is turned off to protect the lighting device due to overvoltage It can work.

At this time, all the LEDs are turned off. In this voltage section, the power supply unit 132 controls the power supply switching unit 120 to receive the power voltage from the line voltage, and turns off the connection between the power supply unit 132 and the taps 1 and 2 (TAP1 and TAP3). .

After that, the line voltage drops to operate as described above in the section where the line voltage is 207.3V to 311V.

Therefore, the set value of the comparator reference voltage 3 needs to be set slightly higher in consideration of the actual AC input margin.

FIG. 14 shows voltage and current characteristics set by the protection circuit unit 152 to protect each circuit from overvoltage when 10% overvoltage is applied. Here, 'A' is the line voltage at the time when the current is limited by the current controller 3, and 'B' is the line voltage at the time when the protection circuit is operated by the comparator 3 reference voltage.

As described above, in order to realize high efficiency, the present invention minimizes power consumption in the tap switching element through a parallel structure of the tap switching unit in order to minimize power consumption in control circuits other than the light emitting diodes. In order to minimize the consumption, the power supply route of the control circuit is changed for each line voltage section so that the power consumption in the control circuit is minimized even if the line voltage is high. By doing so, it is possible to achieve superior power efficiency than conventional SMPS-structured lighting devices.

 In addition, the LED lighting device has a tap structure for high power factor and low THD.

As described above, according to the present invention, the size of the control device generated by using a complicated control circuit generated in a conventional SMPS light emitting diode lighting device and a reduction in the lifetime of the lighting device by using a short-lived electrolytic capacitor, a capacitor and an inductor, etc. In the present invention, a high efficiency, high power factor, and low THD can be realized while the control circuit is simply implemented without problems.

As described above, the present invention minimizes power consumption in the LED control circuit 120 except for the LED array unit 110, thereby maximizing the light conversion efficiency of the LED lighting device and substantially matching the voltage waveform of the line voltage. High power factor can be realized as the current flows. In addition, the design of the lighting device due to the simplification of the control circuit has many advantages in the design of the price competitiveness and the design of the lighting device apparatus over the existing SMPS type lighting device.

101: bridge circuit unit 110: LED array unit
120: LED control unit 131: power supply switching unit
132: power supply unit 133: line voltage detection unit
140: tap switching unit 151: current detection unit
152: protection circuit section 160: comparator reference voltage section
170: comparison unit 180: signal control unit
190: current control unit

Claims (10)

In the LED lighting control device consisting of an LED array part that is turned off and on by the line voltage supplied from the rectifying unit for full-wave rectifying the supplied AC power, and an LED control unit that controls the point and off of each LED of the LED array unit,
The LED array unit,
It is connected in parallel to the line voltage from the rectifier, a plurality of LEDs are composed of a plurality of LED groups (DG1 ~ DGN) connected in parallel, parallel, the tap (TAP 1 ~ TAP) between each LED group (DG1 ~ DGN) N) is formed,
The LED control unit,
A tap switching unit for switching on / off respective taps (TAP 1 to TAP N) of the LED array unit;
A power supply switching unit for converting and switching the power supply of the power supply unit by selecting one of a line voltage or each of the taps in the power supply path of the LED controller according to the voltage level of the line voltage supplied from the rectifier;
A line voltage detector detecting a line voltage applied from the rectifier;
A comparison unit comparing the output of the line voltage detection unit with a reference voltage;
A signal control unit controlling the power supply switching unit and the current control unit according to the output signal of the comparison unit;
And a current control unit controlling the tap switching unit to be turned on / off according to a control signal of the signal controller and controlling a maximum current of the tap switching unit.
The method of claim 1,
It is added between the tap switching unit and the signal control unit,
A current detector for detecting a current flowing in the tap switching unit; And
And a protection circuit unit for detecting an overcurrent, an overvoltage, or an over temperature from the current detection unit, and generating a control signal for protecting each subcircuit according to the detection result.
3. The method according to claim 1 or 2,
The tap switching unit is composed of a respective tap switch connected in parallel between each tab and the current detection unit of the LED array unit, each tap switch is connected to be controlled by the current control unit.
The method of claim 1,
The power supply switching unit is configured to switch the line voltage from the rectifying unit so that the power supply of the LED control unit is differently supplied according to the line voltage level from each tap of the LED array unit according to the output of the signal control unit. Device.
The method of claim 4, wherein
LED lighting control device further comprises a power supply for supplying driving power to the LED control unit and the power supply switching unit in addition to the power supply switching unit.
The method of claim 1,
The comparator comprises a plurality of comparators to control the respective tabs, the reference voltage unit for setting the reference voltage of each comparator is set differently according to each comparator, LED lighting control device, characterized in that the variable can be set.
The method of claim 1,
The current control unit corresponds to each tap switch to turn on / off each tap switch of the tap switching unit according to a control signal of the signal controller, and control the maximum current of each tap switch to control the maximum current of the LED array unit. LED lighting control device comprising a plurality of current controllers.
The method of claim 1,
And the tap switching unit, the current control unit, the signal control unit, the comparison unit, the line voltage detection unit, the power supply switching unit, and the power supply unit are configured as one integrated circuit.
The method of claim 1,
And the signal control unit controls the power supply switching unit according to a control signal from a protection circuit unit for detecting an overcurrent, an overvoltage, or an overtemperature.
The method of claim 9,
And the signal controller comprises respective signal controllers for controlling each current controller of the current controller according to an output signal from each comparator of the comparator or a control signal from the protection circuit.

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