KR20150125875A - LED Lighting Apparatus and Driving Method Thereof Using Electric Power Control - Google Patents

Abstract

Disclosed are a light emitting diode (LED) lighting apparatus using electric power control, and a method for operating a lighting apparatus. According to an aspect of an embodiment of the present invention, the LED lighting apparatus comprises: a filter connected to an input power (VS) port, and performing a part or the entire of a function among harmonic attenuation, power factor control, and current limit; a rectification unit connected to an output of the filter and rectifying alternating current power source passing through the filter into direct current power source; an LED load circuit including a plurality of LED modules connected to both ends of the rectification unit and applied with output voltage of the rectification unit to be operated; a switching unit connected to each node of the LED load circuit and switching to control the number of the LED modules which are turned on among the LED modules; a control unit connected to the LED load circuit and the switching unit, and sensing voltage (v_L) and current (i_L) of the LED modules which are turned on to calculate power (P_L) of the LED modules which are turned on in order to control a switch of the switching unit to be turned on/off to control the power (P_L) of the LED modules which are turned on in a certain range; and a control unit power supply circuit connected to the rectification unit and supplying constant voltage to the control unit.

Description

TECHNICAL FIELD [0001] The present invention relates to an LED lighting apparatus and a lighting apparatus using power control,

The present embodiment relates to an LED lighting device for controlling the power of an LED to operate within a certain range even when an input voltage fluctuates by calculating a power of an LED (Light Emitting Diode) and an operation method thereof.

The contents described below merely provide background information related to the present embodiment and do not constitute the prior art.

LED (Light Emitting Diode) has advantages of low power consumption, long life span of semi-permanent life and brightness characteristic comparable to conventional fluorescent lamps, and therefore active research has been actively conducted, LED light, which is a substitute for a discharge lamp, is widely used as so-called EL light.

When only a simple passive element having no active element (for example, an amplifier, a switch element, a comparator, etc.) using feedback is used in a circuit for driving an LED, the output characteristic is changed when an input voltage fluctuates. This operates in an undesired power range or operates out of a required standard such as a power factor and a total harmonic distortion (THD), thereby lowering the reliability of the LED driving circuit.

The main purpose of the present embodiment is to provide an LED lighting apparatus using power control that switches the respective switches statically to operate the LED power within a certain range despite the variation of the input voltage.

According to an aspect of the present invention, there is provided a power supply apparatus including: a filter unit connected to an input power supply (VS) port and performing a function of a part or all of harmonic attenuation, power factor adjustment, and load voltage adjustment; A rectifier connected to an output of the filter unit and rectifying the AC power through the filter unit to a DC power source; An LED load circuit including a plurality of LEDs (Light Emitting Diode) modules connected to both ends of the rectifying unit, the LED load circuit being operated by receiving an output voltage of the rectifying unit; A switching unit connected to each node of the LED load circuit for switching the number of the LED modules to be turned on so as to be adjusted; And a controller for controlling the LED load circuit and the switching unit to calculate the power (P _L ) of the lit LED module by sensing the voltage (v _L ) of the lit LED module and the current (i _L ) A control unit for controlling on / off of the switch of the switching unit so that the power (P _L ) of the LED module is controlled within a predetermined range; And a control unit power supply circuit connected to the rectification unit and supplying a constant voltage to the control unit.

According to another aspect of the present invention, there is provided a power supply apparatus including: a filter unit connected to an input power supply (VS) port and performing a function of a part or all of harmonic attenuation, power factor adjustment, and load voltage adjustment; A rectifier connected to an output of the filter unit and rectifying the AC power through the filter unit to a DC power source; An LED load circuit including a plurality of LEDs (Light Emitting Diode) modules connected to both ends of the rectifying unit, the LED load circuit being operated by receiving an output voltage of the rectifying unit; A switching unit connected to each node of the LED load circuit for switching the number of the LED modules to be turned on so as to be adjusted; And a controller for controlling the LED load circuit and the switching unit to calculate the power (P _L ) of the lit LED module by sensing the voltage (v _L ) of the lit LED module and the current (i _L ) A control unit for controlling on / off of the switch of the switching unit so that the power (P _L ) of the LED module is controlled within a predetermined range; And a control unit power supply circuit connected to the rectifying unit and supplying a constant voltage to the control unit. In a first operation, the LED lighting apparatus operates in a mode in which all the LEDs and resistors operate.

According to still another aspect of the present invention, there is provided a method of controlling a power amplifier, comprising the steps of filtering harmonic attenuation of a power source VS, power factor adjustment, and load voltage regulation to perform some or all of the functions; Rectifying the filtered AC power to DC power and supplying power to the LED load circuit; Switching the LED load circuit so that the number of LED modules to be turned on is adjusted; And the power (P _L of the voltage to detect the current (i _L) of the LED module light and (v _L) calculates the power (P _L) of the lit LED modules the lighting LED modules of the lighting of the LED module And controlling the on / off of the switch so as to be controlled within a predetermined range.

Further, a process of filtering to perform some or all of the harmonic attenuation of the input power supply VS, the power factor adjustment and the load voltage adjustment; Rectifying the filtered AC power to DC power and supplying power to the LED load circuit; Switching the LED load circuit so that the number of LED modules to be turned on is adjusted; And the power (P _L of the voltage to detect the current (i _L) of the LED module light and (v _L) calculates the power (P _L) of the lit LED modules the lighting LED modules of the lighting of the LED module And controlling the switches to be turned on or off within a predetermined range, wherein the LEDs are operated in a mode in which all the LEDs and the resistors operate during a first operation .

As described above, according to the present embodiment, the power of the LED is calculated in the LED lighting apparatus, and the LED power can be constantly maintained by switching each switch statically even when the input voltage fluctuates.

1 is a block diagram showing a configuration of an LED lighting apparatus.
2 (a) is a diagram showing a change in power of an LED load circuit according to an input voltage in an LED lighting apparatus.
FIG. 2 (b) is a diagram showing changes in V _L and i _L when the switch is turned off (when the number of LED modules to be lit is increased).
3 is a diagram showing a change in the voltage of the LED load circuit according to an input voltage with all the switches of the LED illumination device turned off.
4 is a diagram showing an initial mode determined according to the magnitude of the input voltage.
5 is a flowchart showing a method of operating the LED lighting apparatus.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. Throughout the specification, when an element is referred to as being "comprising" or "comprising", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise . In addition, '... Quot ;, " module ", and " module " refer to a unit that processes at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software.

Fig. 1 shows a configuration of an LED lighting apparatus according to an embodiment of the present invention.

1, an LED lighting apparatus according to an embodiment of the present invention includes a filter unit 110, a rectifying unit 120, an LED load circuit 130, a switching unit 140, a control unit 150, Circuitry 160.

The filter unit 110 is connected to an AC power source (input power source). That is, the filter unit 110 includes the AC power supply is connected in parallel to the (input power), C ₃ (third capacitive element), and the AC power supply (input power) and L ₁ (inductance element) connected in series, L ₁ (inductance element) C ₁ (first capacitance element) which is connected in parallel with, and L ₁ comprises a C ₂ (the second capacitive element) is connected _(inductance element) and in series. Here, C ₃ (third capacitance element) implements a circuit for compensating the power factor. In addition, L ₁ (inductance element), C ₁ (first capacitance element), C ₂ (second capacitance element) are included in the filter section 110 to improve the harmonic filter and the power factor, Circuit.

The rectifying unit 120 is connected to the output of the filter unit 110 to rectify the AC power generated by the filter unit 110 to DC power. At this time, the full bridge rectifier may be used as the rectifier 120, but the present invention is not limited thereto.

The rectifying unit 120 has a C _L connected in parallel with the rectifying unit 120. C _L is a purpose of removing ripples that may be included in the power source rectified by the rectifying unit 120.

The LED load circuit 130 includes an LED array connected in series between both ends of the rectifying section 120. [ An output voltage generated in the rectified view 120 is applied to the LED array so that the LED is turned on. LED array is composed of a plurality of LED modules (n ₀ to n _4). In FIG. 1, the LED module indicates that a plurality of LEDs are connected in series. However, the present invention is not limited thereto, and a single LED may be used depending on the degree of brightness desired by the designer.

A further resistor (R _P ) is connected in series to the last LED module in the LED load circuit (130). If an undesirable overvoltage is applied to the load of the circuit, an overcurrent flows to the LED module, which may significantly increase or even destroy the temperature of the LED module. Therefore, an additional resistor in series with the LED module prevents overcurrent from flowing. In addition, since it is possible to control not only the LED load but also the resistive load to control the power statically, there is no effect even if a series resistance is connected in series to control the power statically.

The switching unit 140 is connected to each of the nodes connected between the LED modules included in the LED load circuit to control the lighting of the LED module. In one embodiment of the invention, the transistor acts as a switch. That is, when the gate voltage of the transistor is not applied (the switch is off), the current flows to the LED module, not the transistor, at the node. When the gate voltage of the transistor is applied (switched on), the internal resistance of the transistor becomes much smaller than the internal resistance of the LED module. Therefore, all the load current flows into the transistor, and no current flows to the LED module connected in parallel with the transistor. By controlling the gate voltage of the transistor in this way, the transistor can act as a switch to control the number of LED modules operating. That is, the number of LED modules to be turned on differs depending on how many switches are turned on. In an embodiment of the present invention, a MOSFET (Metal Oxide Silicon Field Effect Transistor) serves as a switch but is not limited to a MOSFET (Metal Oxide Silicon Field Effect Transistor), and can control the flow of current Devices are all possible. For the sake of convenience, the metal oxide semiconductor field effect transistor (MOSFET) is described as an increase-type MOSFET (Metal Oxide Silicon Field Effect Transistor). However, the metal oxide silicon field effect transistor may be replaced with a depletion type metal oxide silicon field effect transistor will be.

The controller 150 is coupled to the switching unit and the LED load circuit, v _L (the voltage of the lighting LED modules) and i _L (light current of the LED module) the detection by P _L (light power of the LED module) And controls the switching unit. Controller 150 v _L (the voltage of the LED), _L i (current of the LED) and receiving power as an input, and has a signal for controlling the switching unit to switch the output value. Here, the signal for controlling the switch may be a voltage value.

The method by which the controller 150 detects v _L will be described with reference to Equation (1).

[Equation 1]

v _Lm is a value detected by the control unit 150. v _Lmd is a value obtained by digitizing v _Lm for the controller 150 to recognize. Here, 1023 bits means a bit value that can be obtained when the controller 150 has 10 bits, and 5V corresponds to a reference voltage value of the controller 150. 1023 bits and 5V may vary depending on the type or setting value of the controller 150. [ For example, if the controller is 8 bits instead of 10 bits, the value of 1023 bits is 255 bits. v _Lm corresponds to the value where v _L is voltage divided by R ₁ and R ₂ . Also, since v _Lmd is only a value obtained by digitizing v _Lm , v _L can be detected by the process of Equation (1) by detecting v _Lmd .

The method by which the controller 150 detects i _L is described with reference to Equation (2).

&Quot; (2) "

v _cm corresponds to the non-digitized value of the value that the controller 150 wants to detect. v _cmd denotes a value obtained by digitizing v _cm for the control unit 150 to detect. Due to the nature of the OP-AMP, no current flows through the input terminals, so all of i _L flows into R _C. Therefore, we can obtain v _C from Ohm's law. From the obtained v _C , v _cm can be calculated using the property that the potential of the (+) input corresponding to the other characteristics of the OP-AMP is the same as the potential of the (-) input. v _cmd is a value obtained by digitizing the v _cm to be recognized by the control unit 150, so that it is possible to detect i _L by Equation (2) using the digital value recognized by the controller 150.

The method of calculating P _L will be described with reference to Equation (3).

&Quot; (3) "

The average power can be obtained by integrating the voltage and the current for a certain time. However, in the embodiment of the present invention, since v _L and i _L are detected as digitized values, it is possible to calculate P _L from v _Lmd and v _cmd instead of v _L and i _L from Equation (3).

The calculated P _L is compared with a predetermined power value by the control unit to control the switch of the switching unit 140 and controls the switch such that P _L is within a certain range. In the embodiment of the present invention, since the transistor is used as the switch, the switch control is controlled by whether or not the gate voltage is applied to the transistor.

In an embodiment of the present invention, an MCU (Micro Controller Unit) is used as an example of the controller 150. [ However, the present invention is not necessarily limited thereto, but may be variously modified or modified in various manners without departing from the intrinsic characteristics of the present embodiment, such as detecting v _L and i _L values to calculate P _L and controlling the gate voltage of the transistor.

The control unit power supply circuit 160 is connected in parallel with some elements of the rectifying unit 120 to receive a rectified voltage. In the control unit power supply circuit 160, C _P1 and C _P2 serve as a voltage distribution circuit and provide a certain range of voltages to the LDO. The LDO does not allow the input voltage of all ranges to be lowered to a certain level, but the rated voltage for operation is fixed, so that C _P1 and C _P2 serve to distribute the rectified voltage to input the rated voltage. In the control unit power supply circuit 160, a low dropout regulator (LDO) is a device for supplying a constant voltage to the controller 150. Since a very small and constant voltage must be supplied to the control unit 150, the control unit 150 functions to drop a certain range of voltages distributed by C _P1 and C _P2 to a reference voltage and to constantly provide them. The control unit power supply circuit 160 is also connected to the control unit to supply the control unit 150 with a constant voltage dropped by the C _P1 and C _P2 and the LDO.

FIG. 2 (a) is a view showing a variation of P _L according to V _S in an LED lighting apparatus, and FIG. 2 (b) is a diagram showing changes in V _L and i _L when the switch is turned off Fig.

In FIG. 2, it can be seen that the modes are classified into 1 to 6. The mode means a period in a range which is located between the P _L P _L, P _L and _{min, max.} That is, the interval between P _{L , min} and P _{L, max} forms one mode. In this case, when P _L is smaller than P _{L , min} due to increase or decrease of V _{S ,} or when it is larger than P _{L , max} , P _L is changed to P _{L, min} and P _{L , max} And has a mode of increasing or decreasing from the existing mode. For example, it will be in a current mode 2 state to Mode 1 when increasing the P _L mode is made smaller in order is smaller than the P _L P _{L, min} to control the power to the static, P _L is P _{L , max} is larger than P _L, and if P _L is decreased to control the power statically, the mode becomes larger and becomes mode 3. In FIG. 2, however, it is expressed as existing up to mode 6, but the present invention is not limited thereto. Configurable P _{L , min} Alternatively _, by changing P _{L , max} , the range of the mode can be adjusted. The larger the P _{L , min} , or the smaller the P _{L , max} for the implementation of the desired V _S control range, the more the number of modes will be needed.

LED is because it is not an ideal diode, for example, in mode 2, change the mode 3 at the P _L, at _max V _{S2, max} value and the P _{L, max} looking to reduce the V _S P _L, V in _{min S2 , and min} have different values. Therefore, a graph showing the change in P _L forms a hysteresis. Here, hysteresis refers to a hysteresis phenomenon in which, when a value moves with a period or range, it falls back to a different value without returning to the origin.

According to the design process, designers P _{L, max} (lit LED maximum value of the module _power), P _{L, min} (lit LED module power of the minimum value) and v _{S, op} (the input voltage at the operating point) P _{L, op} (LED module power that is turned on at the operating point). Also, P _h (hysteresis power difference) is set to a desired value at design time. Here, P _h (hysteresis power difference) means a difference between P _{L , min} and P _{L , h} (the minimum value of P _L in V _{S , max} in each mode). If there is no hysteresis (P _h = 0), the objective is to design the circuit so that P _{L , min} and P _{L , h will be the} same, but with P _h , arbitrarily. The hysteresis is such that if the input voltage has small variations at the V _S point (eg, V _{s1 , min} and V _{s1 , max} or V _{s2 , min} and V _{s2 , max} ) In order to prevent flickering due to the phenomenon, it must be considered in circuit design.

If P _{L , max} (the maximum value of the LED module power that is lit), P _{L , min} (the minimum value of the lit LED module power), and V _{S , op 1} , C ₁ , C ₂ , C _L, and the number of LEDs that operate in the mode set by default can be found experimentally. Hereinafter, a mode set by default will be described as being selected as the mode 2.

When increasing V _S from V _{S , op} , P _L also increases as V _S increases. _, The voltage value when P _L becomes P _{L , max} becomes V _{S2 , max} (input voltage when P _{L , max} in mode 2). Also _, when decreasing V _{S , op} to V _S , the voltage value when P _L becomes P _{L , min} becomes V _{S1, min} (input voltage when P _{L , min} in mode 1). In other words, V _{S2 , max} and V _{S1 , min} can be found by adjusting V _S in the default mode 2.

If P _L is set to P _{L , max} while operating in mode 2, the number of LED modules to be lit is added to decrease P _L. As can be seen from FIG. 2 (b), when the number of LED modules to be lit is added, that is, when the switch is turned off, v _L increases slightly, whereas i _L decreases sharply. Thus, P _L is reduced overall. When P _L decreases _, the number of LED modules turned on when P _L becomes P _{L , h} (the minimum value of P _L in V _{S , max} in each mode) becomes the number of LEDs to operate in mode 3.

If reducing the number of LED modules for light from P _L, mode 2 in _min state, that is, when the switch is on, FIG. 2 (b) in the case as opposed to in, v _L is slightly decreased, but it i _L is compared It increases greatly. Therefore, P _L increases as a whole. P _L increases and changes from mode 2 to mode 1. If V _S is increased again, P _L becomes P _{L , max} . The voltage value when P _L becomes P _{L , max} becomes V _{S1 , max} (input voltage when P _{L , max} in mode 1).

Geochimyeon the above-mentioned process, it is possible to obtain the number of LED modules for operating the _{S1 V, min,} V _{S1, max,} V _{S2, max,} and mode 3. By repeating these processes, the input voltage at P _{L , min} and P _{L, max of} each mode can be known and the number of LED modules to be controlled to operate in each mode can be obtained. By calculating the number of LED modules to be controlled to operate in each mode, if P _L is P _{L , min} Or P _{L , max} , the control unit 150 controls the switch of the switching unit 140 to control the number of the LED modules to be lit to control the constant P _L to control the number of the LED modules.

Figure 3 is a view showing a change in the LED voltage of the load circuit (v _L) of the input voltage (V _S) in a state of all switches of the LED illumination apparatus strap, Figure 4 is in accordance with the magnitude of the input voltage (V _S) And Fig.

All LED modules and resistors should be operated when the LED lighting device is started for the first time. If all the LED modules and resistors are not operating, the less the number of LED modules to operate, the more the overcurrent flows to the circuit, which may adversely affect the LED module. In order to prevent this overcurrent and to safely start the first drive, all the switches of the switching part are turned off so that all LED modules and resistors operate.

When the controller is first driven, it must know V _S to determine what mode it is. However, since the value of V _S is not input directly, the value of V _S is indirectly detected as shown in FIG. 3 by detecting v _L by the method described in Equation (1). FIG. 3 is a graph showing changes in v _L according to V _S with all switches turned off. As described above, when the LED lighting device is first driven, it is driven with the switch turned off so that all LED modules and resistors operate to prevent overcurrent from flowing. The controller 150 detects v _L in this state and indirectly finds V _S corresponding to the detected v _L as shown in FIG. At this time, V _S corresponding to v _L is measured in advance and inputted to the control unit.

4 will determine which mode the first driving from V _S found out. After determining the mode, the mode is moved to the mode determined from the mode 6. Here, mode 6 is a mode in which all the LED modules and the resistors operate. The reason for starting the mode 6 in the first driving is that all the LED modules and the resistors are operated for preventing the overcurrent as mentioned above. The number of the LED modules is controlled so that the LED module operates in a mode determined from V _S by using the number of LED modules to be controlled to operate in the respective modes obtained in FIG.

Although FIG. 4 shows up to mode 6, since the designer can design the number of modes as desired, the first operation mode may not be the mode 6. As the number of modes varies, the range of V _S also varies. Even if it is different, it can be obtained by the method mentioned in Fig.

5 is a flowchart showing a method of operating the LED lighting apparatus.

The control unit 150 determines whether or not the LED lighting apparatus is driven for the first time (S510).

When the LED lighting apparatus is driven for the first time, the control unit finds V _S from V _L (S520).

Controller LED must control to operate _{in, P L, max, P L} , min, P L, op , and P each mode of V _{S, max,} V _{S, min,} and each mode from _h, find the V _S from V _L The number of modules is detected (S530).

The control unit determines which mode should be operated using the sensed V _S , and controls the number of the LED modules to operate in the determined mode (S540).

The control unit controls the operation of the LED lighting apparatus depending on whether the user operates the LED lighting apparatus (S550).

If the operation of the LED lighting apparatus is inputted from the user, the control unit calculates the value of the current PL (S560).

The control unit determines whether the calculated PL value is greater than PL, max (S570).

The control unit controls so that the LED is turned on so that the value of PL is less than PL, max for the static control of power when the calculated PL value is larger than PL, max (the LED module to be lit is increased) S580).

If the calculated PL value is not greater than PL, max, the control unit determines whether the value of PL is smaller than PL, min (S590).

The control unit controls so that when the calculated value of the PL is less than PL min, the value of the PL is set to a value larger than PL, min (to reduce the number of LED modules to be turned on) for static control of the power S600).

Although it is described in FIG. 5 that the processes S510 to S600 are sequentially executed, this is merely illustrative of the technical idea of the embodiment of the present invention. In other words, those skilled in the art will appreciate that the present invention can be implemented by changing the order described in FIG. 6 without departing from the essential characteristics of an embodiment of the present invention, or by executing one of steps S510 to S600 It should be noted that FIG. 5 is not limited to the time-series order since various modifications and variations may be applied to the above-described processes in parallel.

Meanwhile, the processes shown in FIG. 5 can be implemented as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. That is, a computer-readable recording medium includes a magnetic storage medium (e.g., ROM, floppy disk, hard disk, etc.), an optical reading medium (e.g., CD ROM, And the like). The computer-readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.

The foregoing description is merely illustrative of the technical idea of the present embodiment, and various modifications and changes may be made to those skilled in the art without departing from the essential characteristics of the embodiments. Therefore, the present embodiments are to be construed as illustrative rather than restrictive, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

110: filter section 120: rectifying section
130: LED load circuit 140:
150: control unit 160: control unit power supply circuit

Claims (16)

A filter unit connected to the input power supply (V _S ) port and performing a function of some or all of harmonic attenuation, power factor adjustment, and load voltage regulation;
A rectifier connected to an output of the filter unit and rectifying the AC power through the filter unit to a DC power source;
An LED load circuit including a plurality of LEDs (Light Emitting Diode) modules connected to both ends of the rectifying unit, the LED load circuit being operated by receiving an output voltage of the rectifying unit;
A switching unit connected to each node of the LED load circuit for switching the number of the LED modules to be turned on so as to be adjusted;
And a controller for controlling the LED load circuit and the switching unit to calculate the power (P _L ) of the lit LED module by sensing the voltage (v _L ) of the lit LED module and the current (i _L ) A control unit for controlling on / off of the switch of the switching unit so that the power (P _L ) of the LED module is controlled within a predetermined range; And
And a control unit power supply circuit connected to the rectification unit to supply a constant voltage to the control unit. The method according to claim 1,
The LED load circuit includes:
Further comprising a resistor connected to the last LED module to prevent an overcurrent from flowing to the LED load circuit. The method according to claim 1,
Wherein,
And the voltage and current of the lit LED module are sensed using a resistor or a resistor and an OP-AMP. The method according to claim 1,
Wherein,
When the power of the lit LED module is the maximum value (P _{L , max} ) of the power of the predetermined lit LED module, the number of the lit LED modules is increased to decrease the power of the lit LED module, By grasping the number of lit LED modules that are equal to the minimum value (P _{L, h} ) of P _L at V _{S , max} of each mode, it is possible to grasp the specified number of LED modules that control each mode LED lighting device characterized by. 5. The method of claim 4,
Wherein,
When the power of the lit LED module is out of a predetermined range, by increasing or decreasing the number of the lit LED modules to a specified number of the LED modules controlling the respective modes, Is controlled to be constant. The method according to claim 1,
The power of the lit LED module,
Wherein the hysteresis loop has characteristics of a hysteresis loop and the hysteresis loop adjusts the power difference (P _h ) of the hysteresis loop and the voltage difference (V _h ) of the hysteresis loop to adjust the size of the hysteresis loop. The method according to claim 1,
Wherein,
The input voltage V _s is increased or decreased at the LED power P _{L , op} at the predetermined operating point so that the power of the LED module is changed to the maximum value P _{L , max} of the LED module power And the value of the input voltage (V _S ) corresponding to each mode is grasped by detecting the input voltage at the same time. 8. The method of claim 7,
Wherein,
And the range of the mode can be adjusted. The method according to claim 1,
The control unit power supply circuit includes:
And an LDO (Low Dropout Regulator) for supplying a constant voltage lower than the rectified voltage to the control unit. 10. The method of claim 9,
The control unit power supply circuit includes:
And a capacitor for supplying a voltage in a predetermined range to the LDO (Low Drop Out Regulator). A filter unit connected to the input power supply (V _S ) port and performing a function of some or all of harmonic attenuation, power factor adjustment, and load voltage regulation;
A rectifier connected to an output of the filter unit and rectifying the AC power through the filter unit to a DC power source;
An LED load circuit including a plurality of LEDs (Light Emitting Diode) modules connected to both ends of the rectifying unit, the LED load circuit being operated by receiving an output voltage of the rectifying unit;
A switching unit connected to each node of the LED load circuit for switching the number of the LED modules to be turned on so as to be adjusted;
And a controller for controlling the LED load circuit and the switching unit to calculate the power (P _L ) of the lit LED module by sensing the voltage (v _L ) of the lit LED module and the current (i _L ) A control unit for controlling on / off of the switch of the switching unit so that the power (P _L ) of the LED module is controlled within a predetermined range; And
And a control unit power supply circuit connected to the rectification unit and supplying a constant voltage to the control unit,
And in a first operation, operates in a mode in which all the LEDs and resistors operate. 12. The method of claim 11,
The LED lighting device includes:
And determines which mode corresponds to the input power. 13. The method of claim 12,
The input power source
And detects the voltage of the LED to determine an input power corresponding thereto. 14. The method of claim 13,
The LED lighting device includes:
Wherein the LED lighting device operates in a mode in which all the LEDs and resistors operate in a mode identified by the input power source. Filtering to perform some or all of the harmonic attenuation of the input power supply (V _S ), power factor adjustment and load voltage regulation;
Rectifying the filtered AC power to DC power and supplying power to the LED load circuit;
Switching the LED load circuit so that the number of LED modules to be turned on is adjusted; And
The voltage on the lighting LED modules (v _L) and the current of the LED module, the lighting power of the light of the LED module to detect (i _L) power of the lit LED module to calculate (P _L) (P _L) And controlling the on / off of the switch to be controlled within a predetermined range. Filtering to perform some or all of the harmonic attenuation of the input power supply (V _S ), power factor adjustment and load voltage regulation;
Rectifying the filtered AC power to DC power and supplying power to the LED load circuit;
Switching the LED load circuit so that the number of LED modules to be turned on is adjusted; And
The voltage on the lighting LED modules (v _L) and the current of the LED module, the lighting power of the light of the LED module to detect (i _L) power of the lit LED module to calculate (P _L) (P _L) And controlling the on / off of the switch to be controlled within a predetermined range,
And in a first operation, operates in a mode in which all of the LEDs and resistors are in operation.

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