KR20160031126A - Dimmable led lghiting device - Google Patents

Abstract

The present invention relates to a dimmable AC driven-light emitting diode lighting device and, more particularly, to an AC driven-light emitting diode lighting device which represents a soft dimming characteristic in the entire section at a dimming level by using a triac dimmer configured to perform dimming control by using phase control. According to the present invention, the light emitting diode lighting device comprises: a dimmer for generating and outputting controlled AC power; a rectification unit for generating and outputting driving voltage; a dimming level detection unit for outputting a detected dimming level signal; a first light emitting diode group to n^th light emitting diode group (n is a positive integer which is greater than or equal to two) individually including one or more light emitting diodes; and a light emitting diode driving module for constant-current-controlling driving current of the light emitting diode.

Description

TECHNICAL FIELD [0001] The present invention relates to a dimmable LED lighting device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device (LED) lighting device, and more particularly, to an illumination device for an AC driving light emitting device capable of realizing stable AC driving and exhibiting an ideal level of dimming using a dimmer.

2. Description of the Related Art Generally, a light emitting diode (LED) device such as a light emitting device can be driven only by a direct current (DC) power source due to diode characteristics. Accordingly, the conventional light emitting device using the light emitting device is limited in its use, and a separate circuit such as a switching power supply (SMPS) must be included in order to use the power supply of an AC (AC) 220V currently used in the home. As a result, the circuit of the light emitting device becomes complicated, and the manufacturing cost of the light emitting device becomes high.

In order to solve such a problem, researches on a light emitting device capable of driving a plurality of light emitting cells in series or in parallel and also driving an AC power source are actively under way.

In order to solve the problems of the related art as described above, a sequential driving method of a light emitting element using an AC power source has been proposed. According to such a sequential driving method, assuming a lighting apparatus including three light emitting element groups, in a situation where the input voltage increases with time, the first light emitting element group starts emitting light first at Vf1, At a high voltage Vf2, the second light emitting element group is connected in series with the first light emitting element group, so that the second light emitting element group starts emitting light, and at the voltage Vf3 higher than Vf2, And the third light emitting element group connected in series with the first light emitting element group start emitting light. Further, in a situation where the input voltage decreases with time, the third light emitting element group stops emitting light first in Vf3, the second light emitting element group stops emitting light in Vf2, and the first light emitting element group is turned off By stopping the light emission, the light emitting element driving current is designed to approximate the input voltage.

Meanwhile, the dimming control of the light emitting device refers to a change in luminous flux or luminance (lux) of the light emitting device illumination device, that is, the brightness of the light source in general, depending on the applied supply voltage, A dimmable light source means a device that performs such illumination control functions in a lighting device. Such a dimmable system is provided in a light emitting device illumination device for reducing power consumption of the light emitting device lighting device and for efficient operation. Particularly, the heat generated due to the continuous light emission operation in the light emitting device is a cause of deteriorating the quality and efficiency of the lighting operation. Therefore, it is becoming common to add a dimming function to the light emitting device illumination device in order to reflect the user's demand and at the same time reduce the power consumption. In the light emitting device lighting apparatus to which the dimming function is added, in the case of the light emitting device lighting apparatus using the direct current power source as described above, the alternating current power source is converted into the direct current by using the switching power supply (SMPS) It is possible to expect a certain degree of dimming control characteristics. However, in the case of the above-described AC driving light emitting device lighting apparatus, since the light emitting element is driven only by the voltage rectified by the AC power supply, the dimming function is not easy to implement and the linearity is secured in the dimming control In particular, in the case of a sequential driving type AC driving light emitting device dimmer, when the number of light emitting element groups to emit light is changed according to the magnitude of the driving voltage (for example, The internal resistance of the AC power supply line and the dimmer is changed at a time point exceeding the driving voltage separated by two or more stages, The power voltage is temporarily lowered or raised at the same time when the next step is turned on or off, and the driving voltage is shaken due to the phenomenon that unstable phenomenon may occur In the case of an AC driving light emitting device illumination device having a dimming function according to the related art, it is difficult to obtain an ideal illuminance changing characteristic in all dimming levels, and a phenomenon that the luminous flux changes irregularly in a part of the dimming control period There is a problem that this occurs.

SUMMARY OF THE INVENTION The present invention is intended to solve the problems of the prior art as described above.

An object of the present invention is to provide an AC-driven light emitting device illumination device having an ideal dimming characteristic over a whole illumination level.

Another object of the present invention is to provide an AC driving light emitting device lighting device that exhibits very good lighting characteristics in cooperation with a TRIAC dimmer configured to perform dimming control using phase cut control .

It is another object of the present invention to provide an AC driving light emitting device illumination device which improves the fluctuation phenomenon repeatedly lighting up and off during sequential driving of light emitting element groups.

It is another object of the present invention to provide an AC driving light emitting device lighting apparatus that performs more efficient dimming control because the driving current of a light emitting element interlocked with a driving voltage phase-controlled according to a dimming level changes together.

In addition, the present invention has a limiting function of keeping the driving current of the light emitting element for one-stage driving at a constant value even at the lowest dimming level, so that even if the first dimming level of the dimmer is too low, It is another object to provide a driving light emitting device illumination device.

In order to achieve the above-described object of the present invention and to achieve the specific effects of the present invention described below, the characteristic structure of the present invention is as follows.

According to an aspect of the present invention, there is provided a dimmer comprising: a dimmer receiving an AC power and controlling an AC power input according to a selected dimming level to generate and output a controlled AC power; A rectifier for receiving and controlling the AC power outputted from the dimmer to generate and output a driving voltage; A light control level detector for detecting the selected light control level by receiving the driving voltage and outputting the detected light control level signal; A first light emitting element group to a nth light emitting element group (n is a positive integer of 2 or more) each including one or more light emitting elements each of which is sequentially driven according to the control of the light emitting element driving module upon receiving the driving voltage; And a controller for controlling the sequential driving of the first to n < th > light emitting element groups according to the determined voltage level of the driving voltage, and based on the light control level signal, And a light emitting element driving module for controlling the constant current of the light emitting element.

The light emitting element driving module may be configured to determine a reference value of the light emitting element driving current in proportion to a magnitude of the dimming level signal and to control a maximum value of the light emitting element driving current based on the determined reference value.

The light emitting element driving module may be configured to control the magnitude of the light emitting element driving current differently for each driving period.

Preferably, the light emitting element driving module controls the nth light emitting element driving current to sequentially increase from the first light emitting element driving current for the first driving period to the nth driving period for the nth driving period.

Preferably, the dimmer may be a triac (TRIAC) dimmer.

Preferably, the dimmable AC-driven light emitting device illumination device is connected between the triac dimmer and the rectifying part, and a TRIAC trigger current is flowed to the AC power input or to the rectified voltage output Or a closed current holding circuit that operates with a dummy load.

Preferably, the ignition current holding circuit may be a bleeder circuit.

Preferably, the dimmable AC driving light emitting device illumination device further includes an EMI filter connected between the dimmer and the rectifying part to attenuate high frequency noise of the phase controlled AC power.

Preferably, the dimmer-capable AC driving light-emitting-device lighting apparatus further includes a surge protector connected to the output terminal of the rectifier to protect the circuit.

Preferably, the dim level detection unit may be configured to average the drive voltage to detect the dim level.

Preferably, the dimming level detecting section may include an RC integration circuit.

Preferably, the dimming level detecting unit may further include a voltage limiting circuit that limits the driving voltage to a maximum voltage or less.

Preferably, the dimming level detector is embedded in the light emitting element driving module as an rms converter to convert the driving voltage into a DC signal.

Preferably, the light emitting element driving module may be configured to selectively enable and disable the dimming control function.

Preferably, the light-emitting element driving module may further include an automatic sensing circuit for sensing the connection of the dimming circuit and automatically selecting the allowance and inhibition of the dimming control function.

The light emitting diode driving module may further include a driving voltage stabilizing part for reducing and stabilizing the driving voltage supplied to the light emitting element driving module.

Wherein the bleeder circuit is an active bleeder, the light emitting element driving module includes a bleeder terminal; And a bleeder resistor connected to the bleeder terminal.

The light emitting element driving module may include a low voltage blocking circuit.

The light emitting element driving module includes a temperature control unit. The temperature control unit detects the temperature of the light emitting element driving module, compares the detected temperature with at least two reference temperatures, and stops or permits the driving of the light emitting element driving module , The reference temperature at which the driving of the light emitting element driving module is stopped or allowed is different from each other.

Wherein the temperature control unit allows the light emitting element drive module when the first reference temperature has a temperature lower than the second reference temperature and the detected temperature is equal to or lower than the first reference temperature, When the temperature is equal to or higher than the reference temperature 2, the light emitting element driving module is stopped.

After the light emitting element driving module is stopped by the detected temperature, the temperature of the light emitting element driving module is maintained at the first reference temperature.

Wherein the light emitting element driving module comprises: a minimum voltage level correcting unit for compensating for a rise of a driving voltage level in a minimum interval of a rated voltage; And a maximum voltage level correcting unit for compensating for a decrease in the level of the driving voltage in a maximum interval of the rated voltage.

The light emitting element driving module is connected to an output terminal of the switch unit through a variable resistor for varying the light emitting element driving current levels of the first to nth light emitting element groups.

According to the first preferred embodiment of the present invention, it is possible to provide an AC driving light emitting device illuminating device exhibiting a smooth dimming characteristic over the whole illuminance level.

Further, according to the present invention, it is possible to provide an AC driving light emitting device illumination device that exhibits good dimming characteristics in cooperation with a triac dimmer configured to perform dim control using phase control.

In addition, according to the present invention, it is possible to provide an AC driving light emitting device illumination device that improves irregular shaking when sequential driving of light emitting element groups.

According to another aspect of the present invention, there is provided an AC driving light emitting device illumination device that performs dimming control more efficiently by using a phase-controlled driving voltage and a light emitting device driving current whose size is adjusted according to a dimming level You can expect.

Further, according to the present invention, it is possible to provide an AC driving light-emitting device illumination device capable of eliminating irregular shaking phenomenon by keeping the light-emitting element driving current for one-stage driving at a predetermined value or more even at the lowest dimming level .

FIG. 1 is a view showing a schematic configuration of a dimmable AC-driven light emitting device lighting apparatus according to a first preferred embodiment of the present invention.
2 is a circuit diagram of a dimmable AC-driven light emitting device lighting apparatus according to a first preferred embodiment of the present invention.
FIG. 3 is a block diagram illustrating a light emitting device driving module according to a first embodiment of the present invention. Referring to FIG.
4 is a circuit diagram of a light emitting element group driving unit according to a first preferred embodiment of the present invention.
5 is a waveform diagram illustrating a relationship between a driving voltage and a driving voltage of a light emitting device according to a dimming level according to a first preferred embodiment of the present invention.
FIG. 6A is a graph showing a relation between a dimming voltage, an optical output, and a flux according to dimming levels of a dimmable AC-driven LED device according to a first embodiment of the present invention.
6B is a graph showing an upper limit, a lower limit, and a relationship that can be implemented according to an exemplary embodiment of the light output according to the dimming level of the dimmable AC driving light emitting device according to the first preferred embodiment of the present invention to be.
7 is a diagram illustrating a configuration of an LED driving module according to a second embodiment of the present invention.
8 is a circuit diagram of a light emitting element group driving unit according to a second embodiment of the present invention.
9 is a diagram showing driving currents of the light emitting element group according to the adim control signal of FIG.
10 is a diagram showing a configuration of a temperature control unit according to a second embodiment of the present invention.
11 is a diagram showing LED driving timings by the temperature controller according to the second embodiment of the present invention.
12 is a graph showing LED drive timings by the maximum and minimum voltage level correction according to the second embodiment of the present invention.
FIG. 13 is a waveform showing the LED driving timing by the low voltage blocking circuit according to the second embodiment of the present invention.
14 is a circuit diagram showing a LED driving apparatus according to a third embodiment of the present invention.
FIG. 15 is a waveform diagram showing a voltage waveform of an AC power input to a LED driving apparatus according to a third embodiment of the present invention, a current waveform, and a waveform of a driving voltage supplied to an LED group.
16 is a circuit diagram showing an LED driving apparatus according to a fourth embodiment of the present invention.
17 is a circuit diagram showing an LED driving module according to a fifth embodiment of the present invention.
18 is a circuit diagram showing an LED driving module according to the sixth embodiment of the present invention.
19 is a circuit diagram showing an LED driving module according to a seventh embodiment of the present invention.
20 is a view showing a lighting device of an AC driving light emitting device according to an eighth embodiment of the present invention.
FIG. 21 is a flowchart showing a driving method of a lighting apparatus of an AC driving light emitting device according to an eighth embodiment of the present invention.
22A and 22B are waveforms showing the relationship between the driving current and the driving current of the light emitting element group according to the dimming level according to the eighth embodiment of the present invention.
Fig. 23 is a waveform showing the relationship between the drive current and the blister current of the light emitting element group according to the dimming level change of the present invention.
24 is a waveform showing a pulse width modulation signal according to dimming level control according to a pulse width modulation dimmer.
FIG. 25 is a diagram showing a configuration of an AC driving light emitting device lighting device (hereinafter referred to as 'light emitting device lighting device') capable of color temperature control according to an embodiment of the present invention.
26 is a view showing a configuration of an AC driving light-emitting device illuminating device capable of color temperature control according to another embodiment of the present invention.
27 is a waveform diagram showing the relationship between the driving voltage and the driving current of the light-emitting device illuminating device of Fig.
28 is a view showing a configuration of an AC driving light emitting device illumination device capable of color temperature control according to another embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, the specific shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention in connection with the first embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

[Preferred Embodiment of the Present Invention]

In the embodiment of the present invention, the term 'light emitting element group' means a plurality of light emitting elements (or a plurality of light emitting cells) connected in series / parallel / serial / parallel manner and operates as a unit under the control of the light emitting element driving module Quot; means a set of light emitting elements that are controlled (i.e., turned on / off).

The term 'light-emitting element driving module' refers to a module that receives and controls the light-emitting element by receiving an alternating-current voltage. In the present specification, the driving of the light-emitting element is controlled by using the rectified voltage. It is not intended to be limiting, but should be interpreted broadly and broadly.

The term 'first forward voltage level Vf1' refers to a threshold voltage level at which the first light emitting element group can be driven, and the term 'second forward voltage level Vf2' Group and the second light emitting element group, and the term 'third forward voltage level Vf3' means a threshold voltage level capable of driving the first through third light emitting element groups connected in series, . That is, 'nth forward voltage level (Vfn)' means a threshold voltage level capable of driving the first through the n-th light emitting element groups connected in series. On the other hand, the forward voltage level of each light emitting element group may be the same or different depending on the number / characteristics of the light emitting elements constituting the light emitting element group.

The term " sequential driving method " refers to a driving method of a light emitting element driving module that receives an input voltage whose magnitude changes with time and drives a light emitting element, and sequentially emits a plurality of light emitting element groups And sequentially turns off the plurality of light emitting element groups according to the decrease of the applied input voltage.

The term " first driving period " means a time period during which only the first light emitting element group emits light, and the term " second driving period " means that only the first light emitting element group and the second light emitting element group Means a time period during which light is emitted. Therefore, the 'n-th stage driving period' means a time period during which all of the first to nth light emitting element groups emit light while the group of the (n + 1) th light emitting element group does not emit light.

In this specification, terms such as V1, V2, V3, ..., t1, t2, ..., T1, T2, T3, etc. used for expressing a specific voltage, Are not used to represent absolute values but to indicate relative values used to distinguish one another.

The configuration and function of the light emitting device illumination apparatus 1000

FIG. 1 is a schematic configuration diagram of an illuminating device capable of dimming according to a first preferred embodiment of the present invention (hereinafter referred to as a 'light emitting device illuminating device'), 1 is a circuit diagram of a dimmable AC-driven light emitting device illumination device according to an embodiment. Hereinafter, the configuration and function of the light emitting device illumination apparatus 1000 according to the present invention will be described in general with reference to FIGS. 1 and 2. FIG.

The light emitting device illuminating apparatus 1000 according to the present invention includes a dimmer 100, an EMI filter 110, a rectifying unit 120, a surge protecting unit 130, a dimming level detecting unit 140, And a light emitting device emitting unit 300.

The dimmer 100 according to the present invention receives an AC voltage V _AC from an AC voltage source and controls the input AC voltage V _AC according to a selected dimming level according to a user's operation to generate a controlled AC power And output. The dimmer 100 according to the present invention includes a triac dimmer, a pulse width modulation (PWM) dimmer, and an analog voltage dimmer (not shown) for changing the AC voltage by using a TRIAC Analog Voltage Dimmer), and equivalent light dimmers. That is, the dimmer 100 according to the present invention controls an AC voltage according to a selected dimming level to generate / output a controlled AC power source, and outputs an AC power source (or a controlled AC power source controlled by the dimmer 100) It should be noted that any dimmer can be used as long as it is a dimmer that allows the dim level selected by the dim level detector 140 to be detected to be detected from a rectified regulated rectified voltage. Hereinafter, the present invention will be described with reference to an embodiment in which a triax dimmer is adopted as the dimmer 100 according to the present invention, but the scope of the present invention is not limited thereto. , Embodiments using one of the various dimmers as described above are also within the scope of the present invention.

When the dimmer 100 is implemented using the triac dimmer as described above, the dimmer 100 adjusts the alternating current input based on the dimming level selected (or automatically selected) according to the user's manipulation, cut to generate and output a phase controlled AC voltage. As the triac dimmer adopts the technique already known, the detailed description will be omitted. Although the dimmer 100 according to the present invention is shown in FIG. 1 and FIG. 2 as being included in one apparatus, it is for convenience of explanation and understanding, and actually, And may be connected to the light emitting device lighting apparatus 1000 as a lead wire.

On the other hand, when the dimmer 100 is constructed using a triac dimmer, it is necessary to process a TRIAC Trigger Current. Therefore, the light emitting device lighting apparatus 1000 according to the present invention is connected between the dimmer 100 and the rectifying unit 120, and supplies the triac arc current to the alternating current power input or the rectified voltage output, And a switching current holding circuit 105 which is operated by a switching control signal. In FIG. 2, an example of such a holding current holding circuit 105 is shown to be implemented as a Bleeder circuit consisting of a bleeder capacitor C _B and a bleeder resistor R _B connected in series therewith have. However, it should be apparent to those skilled in the art that the ignition current holding circuit 105 according to the present invention is not limited to the circuit shown in Fig. 2, and that one of various voltage stabilizing circuits known in the art will be.

In addition, as described above, when the triac dimmer is used as the dimmer 100 according to the present invention, high frequency noise is generated at the turn-on time due to the physical characteristics of the triac element. The EMI filter 110 according to an embodiment of the present invention is connected to the output terminal of the dimmer 100 and the output terminal of the rectifier section 100. In this case, the high frequency noise may cause damage or malfunction of the light emitting device 1000, 120, respectively. The noise eliminator 110 according to the present invention performs a function of attenuating the high frequency noise of the phase-controlled AC voltage output from the dimmer 100. Since the noise eliminator 110 adopts a known technique, detailed description thereof will be omitted.

The rectification part 120 according to the present invention also functions to generate a driving voltage (V _P) by rectifying the AC voltage phase control which is output from a dimmer 100, and outputs the generated drive voltage (V _P) . As such a rectifying part 120, one of various known rectifying circuits such as a full-wave rectifying circuit, a half-wave rectifying circuit and the like can be used. The driving voltage V _P output from the rectifying unit 120 is output to the light control level detecting unit 140, the light emitting device driving module 200, and the light emitting device emitting unit 300. FIG. 2 shows an embodiment in which the rectifying section 120 is configured using a bridge full wave rectifier circuit composed of four diodes.

The light emitting device illumination apparatus 1000 according to the present invention further includes a surge protection unit 130 for protecting the light emitting element driving module 200 and the light emitting device emitting unit 300 from overvoltage and / . The surge protection unit 130 is connected to the output terminal of the rectification unit 120 and is configured to perform a function of protecting the elements of the light emitting device illumination apparatus 1000 from an overvoltage and / or an overcurrent. In the embodiment shown in FIG. 2, the surge protection unit 130 of the present invention is configured with a resistor R ₁ and a TVS diode (TVS). It should be apparent to those skilled in the art that the surge protection section 130 is not limited to the circuit shown in FIG. 2, and that one of a variety of known surge protection circuits may be employed as needed.

The plurality of light emitting element groups included in the light emitting element emitting unit 300 may be controlled by the light emitting element driving module 200, Are sequentially emitted, and sequentially turned off. 1 and 2 illustrate a light emitting device emitting unit including a first light emitting device group 310, a second light emitting device group 320, a third light emitting device group 330, and a fourth light emitting device group 340 It is apparent to those skilled in the art that the number of light emitting element groups included in the light emitting element emitting portion 300 can be variously changed as necessary.

The first, second, third, and fourth light emitting element groups 310, 320, 330, and 340 may be the same or different from each other, Or may have different forward voltage levels. For example, the first, second, third, and fourth light emitting element groups 310, 320, 330, and 340 may include different numbers of light emitting element elements The first light emitting device group 310, the second light emitting device group 320, the third light emitting device group 330, and the fourth light emitting device group 340 will have different forward voltage levels. On the other hand, for example, the first light emitting element group 310, the second light emitting element group 320, the third light emitting element group 330, and the fourth light emitting element group 340 include the same number of light emitting element elements The first light emitting element group 310, the second light emitting element group 320, the third light emitting element group 330 and the fourth light emitting element group 340 will have the same forward voltage level .

The dimming level detector 140 according to the present invention receives the driving voltage V _P output from the rectifier 120 and detects the currently selected dim level based on the inputted driving voltage V _P , And outputs the received light intensity level signal to the light emitting element driving module 200. More specifically, the dim level detection unit 140 according to the present invention can be configured to average the drive voltage V _P whose voltage level varies with time to detect the dim level. As described above, since the dimmer 100 according to the present invention is configured to cut the phase of the AC voltage V _AC according to the selected dimming level, when the driving voltage V _P is averaged, the currently selected dimming level is detected . When the dimming level detector 140 is configured in this manner, the dim level signal Adim corresponding to the specific dim level output from the dim level detector 140 may be a DC signal having a constant voltage value. For example, if the dim level is 100%, the corresponding dim level signal (Adim) is 2V and if the dim level is 90%, the corresponding dim level signal (Adim) is 1.8V and the dim level is 50% The corresponding dimming level signal (Adim) may be 1V, and so on. The value of the dim level signal Adim corresponding to this specific dim level and its range can be changed by appropriately selecting the values of the circuit elements constituting the dim level detector 140. [ In Fig. 2, an embodiment in which such a dimming level detecting section 140 is constituted by an RC integration circuit 144 including one resistor R ₄ and one capacitor C ₁ is shown. At this time, the resistor R ₄ is for setting the lowest light emitting element driving current (I _LED ) limit. Therefore, since the lowest light emitting element driving current I _LED is limited through the resistor R ₄ , the lowest light emitting element driving current I _LED can be maintained even at the lowest light emitting level, The dimming characteristic can be improved.

The dimming level detector 140 according to the present invention may further include a voltage limiting circuit 142 that limits the dimming level detector 140 to a maximum voltage or less of the input driving voltage V _P. In general, the maximum voltage level of the driving voltage V _P supplied to the light emitting device 300 is a very high voltage, and therefore, the dim level is detected using the driving voltage V _P as it is, There is a risk that the light emitting element driving module 200 may be damaged when inputted into the driving module 200. In order to solve such a problem, the dimming level detector 140 according to the present invention includes a voltage limiting circuit 142 that limits the input driving voltage V _P to a maximum voltage (for example, 15 V) . In Fig. 2, an embodiment in which such a voltage limiting circuit 142 is implemented using resistors R _{2 and} R ₃ and a Zener diode ZD is shown. Here, the voltage limiting circuit 142 operates as a maximum dimming suppression circuit for reducing the tolerance of the Zener diode ZD.

The dimming level detector 140 according to the first embodiment of the present invention includes three resistors R ₂ and R _3, , R ₄ ), one capacitor (C ₁ ), and one Zener diode (ZD). At this time, the resistor R ₄ is for setting the lowest light emitting element driving current I _LED limit, and the resistors R _{2 and} R ₃ and the Zener diode ZD are operated as the maximum dimming suppression circuit.

1 and 2 illustrate an embodiment in which the dimming level detector 140 of the present invention as described above is implemented as a separate circuit outside the light emitting element driving module 200. However, The dimming level detector 140 according to the present invention may be implemented as an rms converter and may be embedded in the light emitting device driver module 200.

Light-emitting element driving module 200 according to the present invention receives the driving voltage (V _P) output from the rectifying part 120, and determines the magnitude of the driving voltage (V _P) is input, it is determined the drive voltage (V _P Emitting elements 300 (more specifically, each of the plurality of light-emitting element groups 310 to 340 included in the light-emitting element emitters 300) according to the size of the light-emitting element emitters 300. In general, the maximum voltage level of the driving voltage V _P supplied to the light emitting device 300 is a relatively high voltage, and therefore, using the driving voltage V _P as it is is not limited to the light emitting device driving module 200 It can be damaged. In order to prevent this, the light emitting device lighting apparatus 1000 according to the present invention includes a driving voltage stabilizing unit 150 between a driving voltage (V _P ) input node and a driving voltage input terminal of the light emitting device lighting apparatus 1000 can do. 2, the driving voltage stabilization unit 150 according to the present invention may comprise a capacitor (C ₂₎ to stabilize the resistance (R ₆₎ and a drive voltage (V _P) for stepping down the drive voltage (V _P) . Of course, the driving voltage stabilizer 150 according to the present invention is not limited to that shown in FIG. 2, and it will be apparent to those skilled in the art that one of various known circuits can be adopted as needed.

The light emitting element driving module 200 according to the present invention receives the light intensity level signal Adim output from the light intensity level detector 140 and outputs the light emitting element driving current Iim based on the inputted light intensity level signal Adim _Lt ; / RTI > _LEDs ). More specifically, the light emitting element driving module 200 according to the present invention determines a light emitting element driving current reference value (Adim_I _ref ) that is dimmed and controlled in proportion to an input dimming level signal (Adim) And to perform constant current control for the light emitting element driving current I _LED based on the current reference value Adim_I _ref . When the dimming control is performed in this manner, the emission time of the light emitting device emitting portion 300 is controlled by the driving voltage V _P whose phase is controlled (that is, phase-cut according to the dimming level) The magnitude of the light-emitting element driving current I _LED is controlled simultaneously based on the dimming level, so that a smooth dimming characteristic is exhibited over the entire dimming level. In addition, through the above-described structure, it is possible to expect an effect of eliminating the irregular shaking phenomenon. The detailed configuration and function of the light emitting element driving module 200 according to the present invention will be described later with reference to FIG. 3 to FIG.

Meanwhile, the light emitting element driving module 200 according to the present invention may be configured to selectively enable and disable the dimming control function. The light-emitting element driving module 200 may be configured to allow the dimming control function through jumper setting. Further, according to the embodiment, an automatic sensing circuit (not shown) for automatically selecting whether or not to allow the dimming control function can be included in the light emitting element driving module 200. The automatic detection circuit is configured to determine whether or not the dimming circuit is connected, and to automatically select whether to allow the dimming control function according to whether the dimming circuit is connected or not. Such an automatic detection circuit may, for example, detect the presence or absence of a triac dimmer voltage, allow the dimming control function in the presence of the triac dimmer voltage, and prohibit the dimmer control function in the absence of the triac dimmer voltage Lt; / RTI > Various other auto-sensing circuits may be used.

2, the maximum light emitting element driving current setting resistor R ₅ is a resistor for setting the maximum light emitting element driving current limit when the dimming control function is prohibited or when the dimming level is 100%. Therefore, by changing the resistance value of the maximum light emitting element driving current setting resistor R ₅ , the maximum light emitting element driving current reference value I _ref can be changed. Therefore, in consideration of the above-mentioned dimming level detector 140 together with the dimming level detector 140, in the light emitting device lighting apparatus according to the present invention, the minimum light emitting element driving current limitation can be set through the resistor R ₄ , The device driving current limit can be set through the resistor R ₅ .

The configuration and function of the light emitting element driving module 200

FIG. 3 is a configuration diagram of a light emitting element driving module according to a first embodiment of the present invention, and FIG. 4 is a circuit diagram of a light emitting element group driving unit according to the first embodiment of the present invention. Hereinafter, the configuration and function of the light emitting device driving module 200 according to the present invention and the driving control process of the light emitting device lighting apparatus 1000 will be described in detail with reference to FIGS. 3 to 4. FIG.

3, the light emitting device driving module 200 according to the present invention includes a plurality of light emitting device group drivers 220, a light emitting device driving module 220, A control unit 210 and an internal power generation unit 230. 3, the light emitting element driving module 200 according to the present invention may be implemented as an integrated circuit (IC). The light emitting element driving module 200 includes a driving voltage input terminal VP to which a driving voltage V _P is inputted, light-level signal (Adim) the light-level signal input terminal (Adim), maximum drive current setting resistor (R _s) connected to that connection terminal (Rset), a ground terminal (GND) that is grounded is connected to the input, the fourth light emitting element between group 340 connected to the cathode end the fourth current path (P ₄₎ is connected to connection terminals (ST4), the cathode end and the fourth light emitting element group 340, the anode terminal of the third light emitting element group 330 is of the third current path (P ₃₎ of connections with the connectors (ST3), the cathode of the second light emitting element group 320, end and a second current between the third light emitting element group 330, the anode short path (P ₂₎ is connected to connection terminal (ST2), the cathode of the first light emitting element group 310, a second end and a light emitting element group 320, the first current path (P ₁₎ connected end that is connected between the anode terminal It may include (ST1). In the embodiment shown in FIG. 3, the light emitting element driving module 200 is shown as including eight terminals, but it will be apparent to those skilled in the art that the number of terminals can be changed as needed.

The internal power generator 230 according to the present invention performs a function of generating and supplying an internal DC power source V _cc necessary for driving the light emitting element driving module 200 by lowering and smoothing the driving voltage V _P . The internal power generator 230 may be implemented as a smoothing circuit including a resistor and a capacitor.

The light emitting element driving control unit 210 determines the voltage level of the driving voltage V _P inputted from the rectifying unit 120 and sequentially outputs the light emitting element groups 310 to 340 according to the voltage level of the driving voltage V _P And controls the driving. More specifically, the light emitting element driving control unit 210 controls the light emitting element driving control unit 210 such that the voltage level of the driving voltage V _P is between the first forward voltage level Vf1 and the second forward voltage level Vf2 Only the first current path P ₁ is connected and the remaining current paths are opened so that only the first light emitting element group 310 emits light. The light emitting element drive control unit 210 may control the light emitting element driving control unit 210 such that the voltage level of the driving voltage V _P is between the second forward voltage level Vf2 and the third forward voltage level Vf3, (P ₂ ) are connected and the remaining current paths are opened to control the first light emitting element group 310 and the second light emitting element group 320 to emit light. Similarly, in the third-stage operation period in which the voltage level of the driving voltage V _P is between the third forward voltage level Vf3 and the fourth forward voltage level Vf4, the light- Only the path P ₃ is connected and the remaining current paths are opened to control the first to third light emitting element groups 310 to 330 to emit light. In the fourth stage operation period in which the voltage level of the driving voltage V _P is equal to or higher than the fourth forward voltage level Vf4, only the fourth current path P ₄ is connected, and the remaining current paths And controls the first to third light emitting element groups 310 to 340 to emit light. Accordingly, the light emitting element driving control unit 210 according to the present invention controls the sequential driving of the light emitting element groups 310 to 340 according to the voltage level of the driving voltage V _P through the above-described method .

In order to perform the dimming control function, the light emitting element drive control unit 210 according to the present invention determines the light emitting element drive current reference value I _ref , which is a reference for the constant current control, according to the dimming level signal (Adim) , And output the determined light emitting element driving current reference value I _ref to the light emitting element group driving units 220. [ The light emitting element driving current reference value I _ref output from the light emitting element driving controller 210 is a reference value for controlling the constant current of the light emitting element driving current I _LED in the light emitting element group drivers 220. In order to improve the power factor (PF) and the total harmonic distortion (THD) characteristics, the light emitting element drive control unit 210 according to the present invention may further include a light emitting diode The first driving current reference value I _ref1 , the second driving current reference value I _ref2 , the third driving current reference value I _ref3 , the fourth driving current reference value I _ref4 so as to be approximated to the waveform of the voltage V _p , May be set to be different from each other so that the first light emitting element driving current I _LED1 through the fourth light emitting element driving current I _LED4 can be approximated to a sine wave. That is, the reference value may be set to sequentially rise from the first driving current reference value I _ref1 in the first driving section to the fourth driving current reference value I _ref4 in the fourth driving section. The fourth drive current reference value I _ref4 may be set to 100 mA and the third drive current reference value I _ref3 may be set to the fourth drive current reference value I _ref4 And the second driving current reference value I _ref2 may be set to any value between 80mA and 95mA which is 80% to 95% of the fourth driving current reference value I _ref4 , And the first driving current reference value I _ref1 may be set to any value from 30 mA to 65 mA which is 30% to 65% of the fourth driving current reference value I _ref4 . Since the above example assumes that the dim level is selected to be 100%, the first driving current reference value I _ref1 to the fourth driving current reference value I _ref4 are determined according to the changed dimming level as the dim level is changed And the newly determined first driving current reference value I _{ref1 '} to the fourth driving current reference value I _ref4' will be output. Here, the fourth driving current reference value I _ref4 may be the maximum light emitting element driving current I _LEDmax set according to the resistance value of the maximum light emitting element driving current setting resistor R ₅ The first driving current reference value I _ref1 , the second driving current reference value I _ref2 and the third driving current reference value I _ref3 are obtained by _decreasing the fourth driving current reference value I _ref4 in accordance with a preset reduction ratio May be a reference value. Hereinafter, in order to distinguish the dimming level from the maximum driving current reference value I _ref when the dimming level is 100% or when the dimming control function is prohibited, the driving current when the dimming control function is allowed and the dim level is not 100% The reference value is referred to as a dimming controlled driving current reference value (Adim_I _ref ). Concrete contents according to the dimming level will be described later with reference to FIG.

The light emitting element group driving units 220 according to the present invention perform a function of connecting or opening each of the current paths P ₁ to P ₄ under the control of the light emitting element driving control unit 210, Current control for the current ILED. 3, the first light emitting element group driver 222 is connected between the first light emitting element group 310 and the second light emitting element group 320 through the first current path P ₁ , , And is configured to connect or open the first current path (P ₁ ) under the control of the light emitting element drive control unit (210). The second light emitting element group driving unit 224 is connected between the second light emitting element group 320 and the third light emitting element group 330 through the second current path P ₂ , 210 to open or close the second current path P ₂ . Similarly, the third light emitting element group driving unit 226 is connected between the third light emitting element group 310 and the fourth light emitting element group 340 through the third current path P ₃ , Or to open or close the third current path P ₃ under the control of the control circuit 210. Finally, the fourth light emitting element group driving unit 228 is connected to the fourth light emitting element group 340 through the fourth current path P ₄ , and is controlled by the light emitting element driving control unit 210 to generate a fourth current And to connect or open path P ₄ .

The light emitting element group drivers 222 to 228 according to the present invention are configured to perform a constant current control function in addition to on / off control functions of the paths P ₁ , P ₂ , P ₃ and P ₄ . 4 is a circuit diagram of a first light emitting element group driving unit 222 according to a first embodiment of the present invention. 4, the configuration of the first light emitting element group driver 222 is the same as that of the second light emitting element group driver 224 to the fourth light emitting element group driver 228 for convenience of explanation and understanding. Referring to FIG. 4, the configuration and function of the first light emitting element group driver 222 according to the present invention will be described in detail.

Referring to FIG. 4, the first light emitting device group driving unit 222 according to the present invention includes one electronic switching device Q ₁ , one sensing resistor Rsense ₁ , and one differential amplifier OP ₁ . The first light emitting element group driving unit 222 according to the present invention may be connected to the pull-up resistor unit 410 connected to the switch SW ₁ or to the pull-up resistor unit 420 connected to the terminal Can be connected. This switch SW ₁ can be controlled by an automatic detection circuit (not shown) as described above. That is, when no external dimmer circuit is detected or the dimming control function is prohibited according to the jumper setting, the auto sensing circuit controls the switch SW ₁ to connect the first light emitting element group driver 222 to the pull- When the external dimming circuit is detected, the automatic sensing circuit controls the switch SW ₁ to connect the first light emitting element group driving part 222 to the pull-up resistor part 420 connected to the terminal of the Adim do.

The electronic switching element Q ₁ is turned on according to the control of the light emitting element driving controller 210 to connect the first current path P ₁ and turn on to open the first current path P ₁ . As such an electronic switching device Q ₁ , a bipolar junction transistor (BJT), a field effect transistor (FET), or the like can be used, and the type thereof is not limited. FIG. 4 shows an embodiment in which the electronic switching device Q ₁ according to the present invention is implemented as a P-type MOSFET.

A maximum first drive current reference value I _ref1 or a first drive current reference value Adim_I _ref1 outputted from the light emitting element drive controller 210 is input as a reference value to the non-inverting input terminal of the differential amplifier OP ₁ , voltage corresponding to the non-inverting input terminal, the sensing resistance (Rsense1) voltage values that span across (that is, the first current path (P ₁₎ of the first light emitting device drive current (I _LED1) that flows through the differential amplifier (OP ₁₎ Value) is input. A differential amplifier (OP ₁₎ will be maintained in the input reference value comparing the voltage value inputted through the voltage and the inverting input which is input through the non-inverting input terminal, and the first light emitting device drive current (I _LED1) based on the comparison result A constant current control function is performed by controlling the gate voltage of the electronic switching device Q ₁ .

Similarly to the first light emitting element group driver 222, the second light emitting element group driver 224 to the fourth light emitting element driver 228 according to the present invention may also include one electronic switching element, one sensing resistor, And may include an amplifier.

Accordingly, the second light emitting element group driver 224 connects or opens the second current path P ₂ and outputs the second maximum driving current reference value I _ref2 output from the light emitting element driving controller 210 or the dimming control The constant current control is performed so that the second light emitting element driving current I _LED2 can be maintained at the input reference value by using the second driving current reference value Adim_I _ref2 as the reference value. Likewise, the third light emitting element group driver 226 connects or opens the third current path P ₃ and outputs a third maximum driving current reference value I _ref3 or dimming control The constant current control is performed so that the third light emitting element driving current I _LED3 can be maintained at the input reference value using the third driving current reference value Adim_I _ref3 as the reference value. Lastly, the fourth light emitting element group driving unit 228 also connects or opens the fourth current path P ₄ and outputs the fourth maximum driving current reference value I _ref4 or the dimming The constant current control is performed so that the fourth light emitting element driving current ILED ₄ can be maintained at the input reference value by using the controlled fourth driving current reference value Adim_I _ref4 as a reference value.

In the dimming control of the light emitting device lighting apparatus 1000 An example

FIG. 5 is a waveform diagram illustrating a relationship between a light emitting element driving voltage and a light emitting element driving current according to a dimming level based on a positive half period of an AC voltage according to a first exemplary embodiment of the present invention. Referring to FIGS. 2, 3 and 5, a dimming control process performed in the light emitting device illumination apparatus 1000 according to the present invention will be described in detail.

First, the waveforms of the driving voltage V _P and the light emitting element driving current I _LED are shown at the top of FIG. 5 (i.e., FIG. 5 (a)) when the dimming level is set to 100%. Table 1 below is a table summarizing the relationship between the driving period, the operation state of the light emitting element groups, and the driving current of the light emitting element in this case.

Driving section Light emitting element
Group 1 Light emitting element
Group 2 Light emitting element
Group 3 Light emitting element
Group 4 I _LED t1 ~ t2 ON OFF OFF OFF I _ref1 t2 to t3 ON ON OFF OFF I _ref2 t3 to t4 ON ON ON OFF I _ref3 t4 to t5 ON ON ON ON I _ref4 t5 to t6 ON ON ON OFF I _ref3 t6 to t7 ON ON OFF OFF I _ref2 t7 ~ t8 ON OFF OFF OFF I _ref1

As shown in the figure, since the selected dim level is 100%, phase control does not occur with respect to the input AC power source (V _AC ), so that phase control does not occur with respect to the driving voltage (V _P ). 5 (a), the dimming level detecting unit 140 detects the dim level by averaging the driving voltage V _P , and outputs the detected dim level signal Adim to the light emitting element driving And outputs it to the module 200. At this time, the dim level detected is 100%, and the dim level signal Adim inputted to the LED driving module 200 is a constant voltage signal corresponding to the dim level of 100%. Therefore, in this case, the light emitting device illuminating apparatus 1000 is controlled in the same manner as the general four-stage sequential driving method.

5A, at a time point t1 when the voltage level of the driving voltage V _P rises and reaches the first forward voltage level Vf1 with the lapse of time, the light emitting element driving control unit 210 The first light emitting element group driving part 222 is turned on and connected to the first current path P ₁ according to the control of the first light emitting element driving part 222, _And the first light emitting element group 310 emits light. At this time, the luminous element drive controller 210 outputs the maximum first drive current reference value I _ref1 to the first light emitting element group driver 222 as a reference value for the constant current control because the dimming level is 100% group drive 222 is a first light emitting device drive current (I _LED1) for detecting, and the constant current to be maintained at a first light emitting device drive current (I _LED1) up to a first drive current reference value (I _ref1) control .

Subsequently, at a time point t2 when the voltage level of the driving voltage _Vp further rises and reaches the second forward voltage level Vf2 with the lapse of time, The first light emitting element group driving part 222 is turned off and the second light emitting element group driving part 224 is turned on so that the second current path P ₂ is connected to thereby connect the second current path P ₂ The second light emitting device driving current I _LED2 flows through the first light emitting device group 310 and the second light emitting device group 320 emits light. At this time, the luminous element drive controller 210 outputs the second maximum driving current reference value I _ref2 to the second luminosity element group driver 224 as a reference value for the constant current control since the dimming level is 100% group drive 222 is a second light emitting device drive current (I _LED2) of the detection, and the second light emitting device drive current (I _LED2) up to the constant current to be maintained second drive as a current reference value (I _ref2) control .

Similarly, at the time point t3 when the voltage level of the driving voltage _Vp further rises and reaches the third forward voltage level Vf3 with the lapse of time, the light emitting element drive control section 210 controls the second The light emitting element group driver 224 is turned off and the third light emitting element group driver 226 is turned on to connect the third current path P ₃ . The third light emitting element driving current I _LED3 flows through the third current path P ₃ and the first to third light emitting element groups 310 to 330 emit light. At this time, the luminous element drive control unit 210 outputs the third maximum driving current reference value I _ref3 as a reference value for constant current control to the third luminosity element group driver 226 because the luminosity level is 100% group drive 226 is a third light emitting device drive current (I _LED3) detection, and the third light emitting device drive current (I _LED3) so that can be held up to the third drive current reference value (I _ref3) constant current control .

At the time point t4 when the voltage level of the driving voltage V _P further rises and reaches the fourth forward voltage level Vf4 with the lapse of time, The light emitting element group driving unit 226 is turned off and the fourth light emitting element group driving unit 228 is turned on to connect the fourth current path P ₄ . Accordingly, the fourth light emitting element driving current I _LED4 flows through the fourth current path P ₄ , and the first to fourth light emitting element groups 340 to 350 emit light. At this time, the luminous element drive controller 210 outputs the maximum fourth drive current reference value I _ref4 as a reference value for constant current control to the fourth luminosity element group driver 228 because the luminosity level is 100% group drive 228 is a constant current control so that it can be maintained at a fourth light emitting device drive current (I _LED4) is detected, and the fourth light emitting device drive current (I _LED4) is up to the fourth drive current reference value (I _ref4) the .

On the other hand, at a time point t5 when the driving voltage _Vp reaches the maximum value and the voltage level drops to become less than the fourth forward voltage level Vf4 with the lapse of time, The fourth light emitting element group driving unit 228 is turned off and the third light emitting element group driving unit 226 is turned on to connect the third current path P ₃ . The third light emitting element driving current I _LED3 flows through the third current path P ₃ and the first to third light emitting element groups 310 to 330 emit light. The third light emitting element group driving part 226 detects the third light emitting element driving current I _LED3 and the third light emitting element driving current I _LED3 detects the third maximum driving current I _LED3 , The constant current control function is performed so as to be maintained at the reference value I _ref3 .

At a time point t6 when the driving voltage _Vp falls below the third forward voltage level Vf3 with the lapse of time, the light emitting element driving control unit 210 controls the third light emitting element The element group driving unit 226 is turned off and the second light emitting element group driving unit 224 is turned on to connect the second current path P ₂ . The second light emitting device driving current I _LED2 flows through the second current path P ₂ and the first light emitting device group 310 and the second light emitting device group 320 emit light. In this case, the second light emitting element group driving part 224 controls the constant current control function so that the second light emitting element driving current I _LED2 can be maintained at the maximum second driving current reference value I _ref2 .

Finally, at a time t7 at which the driving voltage _Vp falls below the second forward voltage level Vf2 with the lapse of time, the light emitting element driving control unit 210 controls the second The light emitting element group driving part 224 is turned off and the first light emitting element group driving part 222 is turned on to connect the first current path P ₁ . Accordingly, only the first light emitting element group 310 emits light, and the first light emitting element group driving part 222 can maintain the first light emitting element driving current I _{LED1 as} the first maximum driving current reference value I _ref1 So that the constant current control function is performed.

Next, the driving voltage _Vp and the light emitting element driving current I (for example, in FIG. 5 (b)) in the case where a relatively high dimming level _LED ') are shown. Table 2 below is a table summarizing the relationship between the driving period, the operating state of the light emitting element groups, and the driving current of the light emitting element in this case.

Driving section Light emitting element
Group 1 Light emitting element
Group 2 Light emitting element
Group 3 Light emitting element
Group 4 I _LED ' t3 to t4 ON ON ON OFF Adim_I _{ref3 '} t4 to t5 ON ON ON ON Adim_I _{ref4 '} t5 to t6 ON ON ON OFF Adim_I _{ref3 '} t6 to t7 ON ON OFF OFF Adim_I _{ref2 '} t7 ~ t8 ON OFF OFF OFF Adim_I _{ref1 '}

Referring to FIG. 5B, since the light control level is 80%, the phase control is performed with respect to the driving voltage V _P , and therefore, until the voltage level of the driving voltage V _P reaches 0V maintain. 5 (b), the dimming level detector 140 detects the dim level by averaging the driving voltage V _P , and outputs the detected dim level signal Adim to the light emitting element driving And outputs it to the module 200. At this time, the dim level detected will be 80%, and the dim level signal Adim inputted to the LED driving module 200 will be a constant voltage signal corresponding to the dim level of 80%. Therefore, in the embodiment shown in FIG. 5 (b), the light emitting element driving module 200 performs light control control based on the dimming level of 80%.

The voltage level of the driving voltage V _P rises to the third forward voltage level Vf3 at the time point t3 so that the third light emitting element group driving section 226 is turned on and the third current path P ₃ is turned on . The third light emitting device driving current I _LED3 'flows through the third current path P ₃ and the first to third light emitting device groups 310 to 330 emit light. At this time, the luminous element drive control unit 210 supplies the dimming-controlled third driving current reference value Adim_I _ref3 corresponding to the dimming level of 80% as the reference value for the constant current control to the third light emitting element group driving unit 226, respectively. Here, the dimming-controlled third driving current reference value Adim_I _ref3 corresponding to the dimming level of 80% can be determined in various ways. In the first embodiment, the dimming-controlled third driving current reference value Adim_I _ref3 corresponding to the dimming level of 80% is "a * (dim level signal _Adim corresponding to 80% dimming level) * ( (The maximum third driving current reference value I _ref3 ) "(where a is an arbitrary constant for allowing the light output or luminous flux of the luminous means lighting apparatus 1000 to be 80% of the maximum luminous power or luminous flux ). Alternatively, in another embodiment, the dimming-controlled third driving current reference value Adim_I _ref3 corresponding to the dimming level of 80% is determined to be "b * 0.8 * (maximum third driving current reference value I _ref3 )" (Where, b is an arbitrary constant for allowing the light output or luminous flux of the luminous means illumination apparatus 1000 to be 80% of the maximum luminous power or luminous flux). Alternatively, in another embodiment, an equation or a graph for the dimming level and the dimming-controlled third driving current reference value Adim_I _ref3 is stored, and the dimming control is performed using an equation or a graph according to the detected dimming level The third driving current reference value Adim_I _ref3 may be determined. In addition to a variety of other ways, and can be determined this light-controlled third drive current reference value (Adim_I _ref3), in proportion to the dimming level, notwithstanding the above, various modifications and transformation that is determined is the light-control control of the third drive current reference value (Adim_I _ref3) And fall within the scope of the present invention. The dimming-controlled first driving current reference value Adim_I _ref1 , the dimming-controlled second driving current reference value Adim_I _ref2 and the dimming-controlled fourth driving current reference value Adim_I _ref4 may be determined in the same manner.

At a time point t4 when the voltage level of the driving voltage _Vp further rises and reaches the fourth forward voltage level Vf4 with the passage of time, The group driving unit 226 is turned off and the fourth light emitting element group driving unit 228 is turned on to connect the fourth current path P ₄ . Accordingly, the fourth light emitting element driving current I _LED4 'flows through the fourth current path P ₄ and the first to fourth light emitting element groups 340 to 350 emit light. At this time, the light emitting element driving control unit 210 outputs the fourth driving current reference value Adim_I _ref4 controlled by the dimming control corresponding to the dimming level of 80% to the fourth light emitting element group driving unit 228, The constant current control unit 228 detects the fourth light emitting element driving current ILED _{4 '} and controls the fourth light emitting element driving current I _LED4 ' to be maintained at the dimming controlled fourth driving current reference value Adim_I _ref4 Function.

On the other hand, at a time point t5 when the driving voltage _Vp reaches the maximum value and the voltage level drops to become less than the fourth forward voltage level Vf4 with the lapse of time, The fourth light emitting element group driving unit 228 is turned off and the third light emitting element group driving unit 226 is turned on to connect the third current path P ₃ . The third light emitting device driving current I _LED3 'flows through the third current path P ₃ and the first to third light emitting device groups 310 to 330 emit light. In this case, the third light emitting element group driving unit 226 detects the third light emitting element driving current I _LED3 ', and the third light emitting element driving current I _LED3 ' is 80% A constant current control function is performed so as to be maintained at the dimming-controlled third driving current reference value Adim_I _ref3 corresponding to the dimming level.

At a time point t6 when the driving voltage _Vp falls below the third forward voltage level Vf3 with the lapse of time, the light emitting element driving control unit 210 controls the third light emitting element The element group driving unit 226 is turned off and the second light emitting element group driving unit 224 is turned on to connect the second current path P ₂ . Accordingly, the second light emitting device driving current I _LED2 'flows through the second current path P ₂ , and the first light emitting device group 310 and the second light emitting device group 320 emit light. In this case, the second light emitting element group driving unit 224 drives the second light emitting element group driving unit 224 such that the second light emitting element driving current I _LED2 'has a dimming controlled second driving current reference value Adim_I _ref2 ) _so as to maintain the constant current control function.

Finally, at a time t7 at which the driving voltage _Vp falls below the second forward voltage level Vf2 with the lapse of time, the light emitting element driving control unit 210 controls the second The light emitting element group driving part 224 is turned off and the first light emitting element group driving part 222 is turned on to connect the first current path P ₁ . Accordingly, only the first light emitting element group 310 emits light, and the first light emitting element group driving unit 222 generates the first light emitting element driving current I _LED1 'corresponding to the dimming control level of 80% The constant current control function is performed so that it can be maintained at the drive current reference value Adim_I _ref1 .

Next, the driving voltage VP and the light emitting element driving current ILED when a relatively low dimming level (for example, 40%) is set in the lower end of Fig. 5 (i.e., Are shown. Table 3 below is a table summarizing the relationship between the driving period, the operation state of the light emitting element groups, and the light emitting element driving current in this case.

Driving section Light emitting element
Group 1 Light emitting element
Group 2 Light emitting element
Group 3 Light emitting element
Group 4 I _LED '' t4 'to t5 ON ON ON ON Step_I _ref4 '' t5 to t6 ON ON ON OFF Step_I _ref3 '' t6 to t7 ON ON OFF OFF Adim_I _ref2 '' t7 ~ t8 ON OFF OFF OFF Adim_I _ref1 ''

Referring to (c) of Figure 5, the light control level was a phase control occurred with respect to 40%, so the driving voltage (V _P), therefore, the time (t5 '), the voltage level of the drive voltage (V _P) 0V to Lt; / RTI > 5C, the dimming level detector 140 detects the dim level by averaging the driving voltage V _P , and outputs the detected dim level signal Adim to the light emitting element driving And outputs it to the module 200. At this time, the dim level detected will be 40%, and the dim level signal Adim inputted to the LED driving module 200 will be a constant voltage signal corresponding to the dim level of 40%. Therefore, in the embodiment shown in FIG. 5C, the light emitting element driving module 200 performs the dimming control based on the dimming level of 40%.

The voltage level of the driving voltage V _P rises to the fourth forward voltage level Vf4 at the time point t5 so that the fourth light emitting element group driving unit 228 is turned on under the control of the light emitting element driving control unit 210, And the fourth current path P ₄ is connected. Accordingly, the fourth light emitting element driving current I _LED4 '' flows through the fourth current path P ₄ and the first to fourth light emitting element groups 340 to emit light. At this time, the light emitting device driving control unit 210 outputs the fourth driving current reference value Adim_I _ref4 ', which is the dimming control corresponding to the dimming level of 40%, to the fourth light emitting diode group driving unit 228, The driving unit 228 detects the fourth light emitting element driving current I _LED4 '' and the fourth light emitting element driving current I _LED4 '' is maintained at the dimming controlled fourth driving current reference value Adim_I _ref4 ' So that a constant current control function is performed.

On the other hand, at a time point t5 when the driving voltage _Vp reaches the maximum value and the voltage level drops to become less than the fourth forward voltage level Vf4 with the lapse of time, The fourth light emitting element group driving unit 228 is turned off and the third light emitting element group driving unit 226 is turned on to connect the third current path P ₃ . Accordingly, the third light emitting element driving current I _LED3 '' flows through the third current path P ₃ and the first to third light emitting element groups 330 to 330 emit light. At this time, in the same manner as described above, the third light emitting element group driver 226 detects the third light emitting element driving current I _LED3 '', and the third light emitting element driving current I _LED3 ' The third driving current reference value Adim_I _ref3 'corresponding to the dimming level of 40% input from the element driving control unit 210 is controlled.

At a time point t6 when the driving voltage _Vp falls below the third forward voltage level Vf3 with the lapse of time, the light emitting element driving control unit 210 controls the third light emitting element The element group driving unit 226 is turned off and the second light emitting element group driving unit 224 is turned on to connect the second current path P ₂ . Accordingly, the second light emitting device driving current I _LED2 '' flows through the second current path P ₂ , and the first light emitting device group 310 and the second light emitting device group 320 emit light. At this time, as described above, the second light emitting element group driver 224 is configured such that the second light emitting element driving current I _LED2 '' has a second dimming control current value corresponding to a dimming level of 40% Adim_I _ref2 ').

Finally, at a time t7 at which the driving voltage _Vp falls below the second forward voltage level Vf2 with the lapse of time, the light emitting element driving control unit 210 controls the second The light emitting element group driving part 224 is turned off and the first light emitting element group driving part 222 is turned on to connect the first current path P ₁ . Accordingly, only the first light emitting element group 310 emits light, and the first light emitting element group driving unit 222 _outputs the first light emitting element driving current I _LED1 '' to the light control controlled apparatus 300 corresponding to the dimming level of 40% 1 drive current reference value (Adim_I _ref1 ').

FIG. 6A is a graph showing the relationship between the dimming voltage, the optical output, and the flux according to the dimming level of the dimmable AC driving light emitting device according to the first preferred embodiment of the present invention, FIG. 5 is a graph showing a relationship that can be implemented according to an upper limit, a lower limit, and an exemplary embodiment of a light output according to a dim level of a dimmable AC-driven LED device according to a first preferred embodiment of the present invention. 6A and 6B, when the light emitting device illuminating apparatus 1000 according to the present invention is used, the light output of the light emitting device illuminating apparatus 1000 and the light flux have a soft dimming characteristic over the entire illuminance level And it can be confirmed that irregular shaking does not occur.

FIG. 7 is a diagram illustrating a configuration of an LED driving module according to a second embodiment of the present invention, and FIG. 8 is a circuit diagram of a light emitting element group driving unit according to the second embodiment of the present invention.

FIG. 9 is a view showing driving currents of a light emitting element group according to the control signal of FIG. 8, FIG. 10 is a diagram illustrating a configuration of a temperature control unit according to a second embodiment of the present invention, FIG. 5 is a diagram illustrating LED driving timings by a temperature control unit according to a second embodiment of the present invention.

7 to 10, configurations other than the LED driving module 500 according to the second embodiment of the present invention are the same as those of the light emitting device lighting apparatus according to the first embodiment of the present invention. .

The LED driving module 500 includes an internal bias reference setting unit 511, a low voltage shutdown circuit UVLO, a start-up 512, a reference current setting unit 530, a temperature control unit 540, A light emitting level detection unit 553, a reference voltage selection unit 555, a driving current setting unit 559, a switch unit 570, first to fourth light emitting element groups LED1 to LED4, . The LED driving module 500 may control the driving of the first to fourth LED groups LED1 to LED4 by a dimming level control signal according to dim levels. Referring to FIG. 10, at least one or more of the first to fourth light emitting element groups LED1 to LED4 may be driven according to the light control level control signal (Adim control signal).

The internal bias reference setting unit 511 generates a driving voltage of the internal configuration of the LED driving module 500 using the power supply voltage VCC. The internal bias reference setting unit 511 receives the drive module enable signal from the power supply voltage VCC and the start-up 512 and outputs the bias voltage to the reference current setting unit 530 and the reference voltage selector 555 Respectively. Here, the internal bias reference setting unit 511 may include a function of providing the driving voltage of the temperature controller 540 and detecting the temperature, though it is not particularly limited.

The temperature control unit 540 detects the temperature of the LED driving module 500 and enables driving of the LED driving module 500 below the first reference temperature, 500 are disabled.

Here, the general LED driving module is allowed or prohibited to drive the LED driving module at a reference temperature or more. As a result, the conventional LED driving module has a problem that flicker phenomenon occurs due to repeated permission or inhibition of driving the LED driving module around the one reference temperature.

The temperature at which the driving of the LED driving module 500 is prohibited and the temperature at which the LED driving module 500 is allowed to be driven are different from each other. Therefore, the temperature controller 540 can improve the flicker phenomenon that may occur by setting the first and second reference temperatures that are allowed and prohibited to drive the LED driving module 500 to be different from each other and the same. The temperature controller 540 will be described in detail with reference to FIGS. 10 and 11. FIG.

The low voltage blocking circuit (UVLO) has a function of cutting off the low voltage driving by using the inputted driving voltage (VP). Accordingly, the first to fourth light emitting element groups LED1 to LED4 are driven stably. The undervoltage lockout circuit UVLO may include a first resistor R1, first and second zener diodes D1 and D2, and a start-up 512. Here, the low-voltage interruption circuit (UVLO) is not limited to the above-described configuration, and various circuits for interrupting the low-voltage driving can be used in a different configuration.

The start-up 512 generates a start enable signal informing the driving start time of the LED driving module 500. The start-up 512 may generate a temperature control enable signal POR for driving the temperature controller 540.

The active bleeder comprises a bleeder resistance (R _BLD) connected to the firing current reference setting section (530) with the bleeder port (Bleeder). The active bleeder has a function for preventing malfunction of the dimmer. Particularly, the active bleeder can select the capacity of the bleeder resistor _RBLD connected to the driving voltage VP so that the dimmer is normally driven above the reference current at which the dimmer operates.

A buffer 551 is positioned between the ADIM terminal and the dimming level detector 553 and a reference voltage selector 555. A RSET terminal is connected between the reference voltage selector 555 and the driving current setting unit 559, do.

A dimming level is detected according to a driving voltage phase-converted by the dimmer, and a driving current reference value corresponding to the dimming level is determined and driven, will not be described in detail with reference to the first embodiment of the present invention.

Here, in the second embodiment of the present invention, the first to fourth driving current reference values for driving the first to fourth light emitting element groups LED1 to LED2 may be changed using the variable resistor R6. The variable resistor R6 may be connected to the switch end of the LED driving module 500. [

The temperature controller 540 will be described in detail with reference to FIG. 9 and FIG.

9 to 11, the temperature controller 540 includes a temperature sensor TS, a first resistor Rt1, a second resistor Rt2, a first temperature detector 542, a second temperature detector 543, a comparison unit 545, and a control unit 547.

The temperature controller 540 has a function of detecting the temperature of the LED driving module and controlling the driving of the LED driving module to prevent malfunction of the LED driving module due to high temperature. The first and second temperature detectors 542 and 543 have different first and second reference temperatures. For example, the first reference temperature may be 130 ° C, and the second reference temperature may be 150 ° C.

The comparison unit 545 outputs a high signal at a temperature lower than the first reference temperature (130 ° C or less) of the temperature control unit enable signal POR and the first temperature detection unit 542, And outputs a signal.

The selection unit 547 allows or prohibits driving of the driving current setting unit by using the signal input from the comparison unit 545 and the signal input from the second temperature detection unit 542. Specifically, the second temperature detector 543 outputs a high signal at a second reference temperature or higher (150 ° C or higher), and outputs a low signal at a temperature lower than the second reference temperature. When the high signal is input from the comparator 545, the selector 547 turns on the switching element Q ₄ to allow driving of the driving current setting unit to drive the LED driving module. If a high signal is input from the second temperature detector 543, the selector 547 turns off the switching element Q ₄ to prohibit driving of the driving current setting unit to stop the LED driving module . Here, the selection unit 547 maintains the driving of the LED driving module in a stopped state until a high signal is input from the first temperature detection unit 542 after the driving is inhibited.

More specifically, referring to Table 4 below,

Temperature The comparator The second temperature detector Q ₄ 0 ° C to 130 ° C High Low OFF 131 ° C to 149 ° C Low Low OFF 150 ° C ~ Low High ON 149 ° C to 131 ° C Low Low ON (Hold)

Referring to Table 4, the comparator 545 compares the high signal of the first reference temperature controller 542 with the high signal of the temperature controller enable signal POR in a temperature range of 0 ° C. to 130 ° C. The second temperature detection unit 543 outputs a low signal to the selection unit 547 because the detected temperature is lower than 150 ° C. It allows the operation of turning off the LED drive module, wherein the selection unit 547 is the comparison unit 545 and a high signal to turn the switch (Q ₄₎ using a low-signal of the second temperature detector (543) of.

The comparator 545 compares the low signal of the first reference temperature controller 542 and the high signal of the temperature controller enable signal POR to the selector 547 in a period of 131 ° C to 149 ° C, And the second temperature detector 543 outputs a low signal to the selector 547 because the detected temperature is less than 150 ° C. The selector 547 turns off the switch Q ₄ by using the low signal of the comparator 545 and the low signal of the second temperature detector 543 to allow driving of the LED driving module.

The comparator 545 outputs a low signal of the first reference temperature controller 542 and a high signal of the temperature controller enable signal POR to the selector 547 in a period longer than 150 ° C, And the second temperature detection unit 543 outputs a high signal to the selection unit 547 because the detected temperature is 150 ° C or higher. The selector 547 turns on the switch Q ₄ by using the low signal of the comparator 545 and the high signal of the second temperature detector 543 to prohibit driving of the LED driving module.

The comparator 545 compares the low signal of the first reference temperature controller 542 with the high signal of the temperature controller enable signal POR during the temperature range of the LED drive module 149 ° C to 131 ° C, And the second temperature detector 543 outputs a low signal to the selector 547 because the detected temperature is less than 150 ° C. The selection unit 547 turns on the switch (Q ₄₎ using a low-signal of the low signal and the second temperature detector (543) of the comparison unit (545) turns on prohibits the driving of the LED drive module. Here, the temperature of the LED driving module is changed from a low signal to a high signal from the first temperature detector 542 during a period in which the temperature of the LED driving module falls from 150 ° C to 150 ° C . The temperature of the LED driving module is 149 ° C to 131 ° C in a period from the second temperature detector 543 to a low signal to a low signal from the first temperature detector 542 It is defined as Hold period.

The present invention differs from a temperature at which the driving of the LED driving module is inhibited and a temperature at which the driving of the LED driving module is permitted. Accordingly, the temperature controller 540 sets the first and second reference temperatures (for example, 130 ° C and 150 ° C) at which the driving of the LED driving module is allowed and prohibited, Can be improved.

12 is a graph showing LED drive timings by the maximum and minimum voltage level correction according to the second embodiment of the present invention.

The LED driving module of the present invention further includes a maximum and minimum driving voltage level correcting unit (not shown). A typical LED drive module has a drive voltage that is proportional to the increase in rated voltage. The maximum and minimum driving voltage level correction units of the present invention are configured such that the level of the reference driving voltage provided to the LED driving module at any minimum rated voltage period is compensated and the reference driving voltage supplied to the LED driving module at any maximum rated voltage interval The level is compensated. Specifically, when the rated voltage of the LED driving module is AC 185V to 265V, the minimum driving voltage level correction unit increases the voltage level of about 5% of the basic driving voltage at the minimum rated voltage (AC 185V) The level correction section reduces the voltage level of approximately 5% of the basic drive voltage at the maximum rated voltage (AC 265V). That is, the maximum and minimum driving voltage level correcting units of the present invention compensate the voltage level within ± 5% of the reference driving voltage according to the magnitude of the rated voltage, thereby realizing the LED driving module stable to the variation of the rated voltage.

Therefore, the LED driving module of the present invention can realize stable driving by increasing or decreasing the driving voltage in the minimum and maximum intervals of the rated voltage, respectively.

13 is a waveform diagram showing LED driving timings by the low voltage blocking circuit according to the second embodiment of the present invention.

As shown in FIG. 13, the low voltage cut-off circuit (UVLO) of the present invention disables or permits the driving of the LED driving module in a driving voltage period having a certain voltage level, The driving module can be stopped and stable driving of the light emitting element group can be realized. The low voltage interruption circuit (UVLO) of the second embodiment is described as limiting the driving of the LED driving module in the low voltage interval of 20% or less. However, the present invention is not limited to this, and the low voltage interval can be changed as much as possible.

FIG. 14 is a timing chart showing the LED driving apparatus according to the third embodiment of the present invention, FIG. 15 is a graph showing the voltage waveform of the AC power input to the LED driving apparatus according to the third embodiment of the present invention, And a waveform diagram showing a waveform of a driving voltage supplied to the LED group.

14 and 15, the LED driving apparatus according to the third embodiment of the present invention includes a power supply unit V _AC , a full wave rectifying unit 910, an LED light emitting module 930, and an LED driving module 920, .

The power supply unit (V _AC ) generates an AC voltage of a high voltage.

A fuse F ₁ is provided between the power supply unit V _AC and the LED light emitting module 930. The fuse F ₁ has a function of protecting the wiring and circuits of the LED driving device by interrupting the supply of an excessive input voltage over a predetermined voltage level through the power supply unit V _AC . Although not shown in the figure, the fuse F ₁ may be replaced by resistors (not shown) connected to input / output terminals of the power supply unit V _AC .

The full-wave rectification unit 910 may be composed of four diodes D1 to D4 and full-wave rectifies an AC voltage from the power supply unit V _AC to generate a full-wave rectified voltage. In the present invention, the full-wave rectified voltage is defined as a driving voltage for driving the LED light emitting module 930. In the embodiment of the present invention, the bridge full-wave rectifying circuit using the four diodes D1 to D4 is limited. However, the present invention is not limited to this and may be any one of various rectifying circuits such as a full wave rectifying circuit and a half wave rectifying circuit.

The LED light emitting module 930 may include a plurality of LED groups. For example, the plurality of LED groups include first through fourth LED groups (LED1, LED2, LED3, LED4). The first through fourth LED groups LED1, LED2, LED3, and LED4 may be sequentially driven by the LED driving module 920. [ The LED light emitting module 930 configured by the first through fourth LED groups LED1, LED2, LED3, and LED4 is described in the embodiment of the present invention. However, the present invention is not limited thereto, . In addition, the number of LEDs of each of the first to fourth LED groups (LED1, LED2, LED3, LED4) may be the same or different. Here, the first to fourth LED groups (LED1, LED2, LED3, LED4) may have different forward voltage levels.

The LED light emitting module 930 includes first to fourth capacitors C ₁ , C ₂ , C ₃ , and C ₄ . The first to fourth capacitors _{(C 1. C 2, C} 3, C 4) may be connected to the first to fourth LED group (LED1, LED2, LED3, LED4 ) in parallel. Specifically, the first capacitor C ₁ and the first LED group LED 1 are connected in parallel between an input terminal of the full wave rectifier 910 and the second LED group LED 2. The second capacitor C ₂ and the second LED group LED 2 are connected in parallel between the first and third LED groups LED 1 and LED 3. The third capacitor C ₃ and the third LED group LED 3 are connected in parallel between the second and fourth LED groups LED 2 and LED 4. The fourth capacitor C ₄ and the fourth LED group LED 4 are connected in parallel between the third LED group LED 3 and the LED driving module 920.

The first to fourth capacitors _{(C 1. C 2, C} 3, C 4) is a driving voltage is defined as a full-wave rectified voltage for driving the first to fourth LED group (LED1, LED2, LED3, LED4 ) And supplying the compensated driving voltage to the LED group to prevent the flicker phenomenon caused by on / off of the switch for controlling the driving of each LED group.

The LED light emitting module 930 includes first to third diodes D ₅ , D ₆ , and D ₇ . The first to third diodes D ₅ , D ₆ and D ₇ may be connected between the first to fourth LED groups LED 1, LED 2, LED 3 and LED 4. Specifically, the first diode (D ₅₎ is connected in series between a first and a group 2 LED (LED1, LED2). The first diode D ₅ is connected in series between the first and second capacitors C _{1 and} C ₂ . The second diode D ₆ is connected in series between the second and third LED groups LED 2 and LED 3. The second diode D ₆ is connected in series between the second and third capacitors C ₂ and C ₃ . The third diode D ₇ is connected in series between the third and fourth LED groups LED 3 and LED 4. The third diode D ₇ is connected in series between the third and fourth capacitors C ₃ and C ₄ .

The first through the third diode _{(D 5, D 6, D} 7) are the first to the period in which the driving is started and cut off of the first to the 4 LED group (LED1, LED2, LED3, LED4 ) by sequentially driving the fourth capacitor is compensated drive voltage charged in the _{(C 1. C 2, C} 3, C 4) has a function to be supplied to the LED group.

The driving of the first to fourth LED groups LED1, LED2, LED3 and LED4 is defined as a period in which the driving voltage is higher than the first forward voltage level Vf1 and lower than the second forward voltage level Vf2 , And the first LED group (LED1) is driven under the control of the LED driving module 920 during the first period. The first capacitor C ₁ is charged with the energy of the second forward voltage level Vf 2 higher than the first forward voltage level Vf 1.

The second period is defined as a period in which the driving voltage is equal to or higher than the second forward voltage level Vf2 and lower than the third forward voltage level Vf3 and is controlled by the LED driving module 920 during the second period, The LED groups (LED1, LED2) are driven. The second capacitor C ₂ is charged with the energy of the third forward voltage level Vf 3 higher than the second forward voltage level Vf 2. Here, the first capacitor C ₁ supplies the compensated driving voltage charged in the current rising period of the switch for driving the second LED group LED 2 through the first diode D ₅ to improve the flicker .

The third period is defined as a period in which the driving voltage is higher than the third forward voltage level Vf3 and lower than the fourth forward voltage level Vf4, The LED groups (LED1, LED2, LED3) are driven. The third capacitor C ₃ is charged with the energy of the third forward voltage level Vf3 and the fourth forward voltage level Vf4. Here, the second capacitor (C ₂ ) supplies the compensated driving voltage, which is charged in the current rising period of the switch for driving the third LED group (LED 3), through the second diode (D ₆ ) to improve the flicker .

The fourth period is defined as a period in which the driving voltage is higher than the fourth forward voltage level Vf4 and lower than the fifth forward voltage level Vf5 and is controlled by the LED driving module 920 during the fourth period, The LED groups (LED1, LED2, LED3, LED4) are driven. The fourth capacitor C ₄ is charged with the energy of the fourth forward voltage level Vf 4 and the fifth forward voltage level Vf 5. Here, the third capacitor C ₃ supplies the compensated driving voltage charged in the current rising period of the switch for driving the fourth LED group (LED 4) through the third diode D ₇ to improve the flicker .

The LED driving apparatus of the present invention can control the first through fourth LED groups (LED1, LED2, LED3, LED4) with the same driving current for constant current.

15, in order to improve the power factor (PF) and the total harmonic distortion (THD) characteristic, the LED driving apparatus according to the present invention includes a driving current The values of the reference currents of the first to fourth LED groups LED1, LED2, LED3 and LED4 are set to be different from each other so that the waveform of the first to fourth LED groups LED1, LED2, LED3, LED4) can be approximated to a sinusoidal waveform. For example, the fourth LED group (LED4) may be configured to control the driving current to a constant current of 100 mA by a control signal of 4V. The third LED group (LED3) may be configured to control the driving current to a constant current of 80 mA to 95 mA by a control signal of 3V. The second LED group (LED2) may be configured to control a constant current from 65 mA to 80 mA by a control signal of 2V. Also, the first LED group (LED1) can be configured to control the driving current to a constant current from 30 mA to 65 mA by a control signal of 1V.

As described above, the LED driving apparatus according to an embodiment of the present invention includes a plurality of LED groups, each of which includes a plurality of LED groups, The flicker phenomenon due to the off-state can be improved.

In addition, the present invention can improve the power factor PF and the total harmonic distortion (THD) characteristics by setting the reference current values of the first to fourth LED groups (LED1, LED2, LED3, LED4) to be different from each other.

16 is a circuit diagram showing an LED driving apparatus according to a fourth embodiment of the present invention.

16, the LED driving apparatus according to the fourth embodiment of the present invention is the same as the LED driving apparatus according to the embodiment of the present invention except for the valley-fill circuit 940, A description thereof will be omitted.

The valley-fill circuit 940 is connected between the full wave rectification part 910 and the LED light emitting module 930. The valley-fill circuit 940 has a function for improving the power factor PF. The valley-fill circuit 940 includes fourth to sixth diodes D ₈ , D ₉ and D ₁₀ and includes fifth and sixth capacitors C _{5 and} C ₆ and a resistor R .

As described above, the LED driving apparatus according to another embodiment of the present invention includes the LED driving module 920, the LED driving module 920, The flicker phenomenon due to the off-state can be improved.

In addition, the present invention can improve the power factor (PF) characteristic by connecting the valley-fill circuit 940 between the full wave rectification part 910 and the LED light emitting module 930.

FIG. 17 is a logo showing the LED driving module according to the fifth embodiment of the present invention, FIG. 18 is a logo showing the LED driving module according to the sixth embodiment of the present invention, FIG. Fig. 2 is a circuit diagram showing an LED driving module according to an embodiment.

17 to 19, the LED driving modules 920, 1020 and 1120 can be variously modified.

17, the LED driving module 920 includes a first constant current driving circuit QM ₁ and a first resistor R ₁ connected to the first LED group LED ₁ , and the first constant current driving circuit And a first Zener diode DZ ₁ for stable constant-current driving of the constant current source QM ₁ . The LED driving module 920 includes a second constant current driving circuit QM ₂ and a second resistor R ₂ connected to the second LED group LED ₂ and the second constant current driving circuit QM ₂ a second Zener diode (DZ ₂₎ for stable constant-current drive. The LED driving module 920 includes a third constant current driving circuit QM ₃ and a third resistance R ₃ connected to the third LED group LED ₃ and the third constant current driving circuit QM ₃ a third Zener diode (DZ ₃₎ for a stable constant-current drive. The LED driving module 920 includes a fourth constant current driving circuit QM ₄ and a fourth resistance R ₄ connected to the fourth LED group LED ₄ and the fourth constant current driving circuit QM ₄ a fourth Zener diode (DZ ₄₎ for a stable constant-current drive.

The first to fourth constant current drive circuits QM ₁ , QM ₂ , QM ₃ and QM ₄ may be n-type depletion metal-oxide semiconductor field-effect transistors (MOSFETs), Junctin gate field- Effect transistors, MOSFETs (Metal-Oxide Semiconductor Field-Effect Transistors), and BJTs (Bipolar Junction Transistors).

18 and 19, the LED driving modules 1020 and 1120 include driving control units 1021 and 1121, and the first through fourth resistors R ₁ , R _{2 ,} R _{3 ,} R ₄ ) may all be the same or different.

Here, the control signals of the drive control unit (1021, 1121) in the first to the fourth constant current driving circuit according to (Vc _1, Vc _2, Vc _3, Vc ₄ or Vc _5, Vc _6, Vc _7, Vc ₈₎ (QM ₁ , QM ₂ , QM ₃ , QM ₄ ).

The constant current drive circuits (QM ₁ , QM ₂ , QM ₃ , QM) of the LED drive modules (920, 1020, 1120) are sequentially driven by compensating drive voltages charged in capacitors connected in parallel to each of a plurality of LED groups Flicker phenomenon due to on / off of the scan lines ₄ and ₄ can be improved.

In addition, the present invention can improve the power factor PF and the total harmonic distortion (THD) characteristics by setting the reference current values of the first to fourth LED groups (LED1, LED2, LED3, LED4) to be different from each other.

20 is a view illustrating a lighting device of an AC driving light emitting device according to an eighth embodiment of the present invention, and FIG. 21 is a view illustrating a driving method of a lighting device of an AC driving light emitting device according to an eighth embodiment of the present invention It is a flowchart.

20, the lighting apparatus of the AC driving light emitting device of the present invention includes a triac dimmer 1200, a lighting current holding circuit 1205, a rectifying unit 1220, a dimming level control unit 1240, A light emitting device 1300, and a light emitting device emitting unit 1400.

The triax dimmer 1200 receives an AC voltage V _AC from an AC voltage source and generates an AC voltage whose phase is modulated according to a dimming level selected by a user's operation of the inputted AC voltage V _AC . The triax dimmer 1200 generates a phase-controlled AC voltage by phase-trimming an _AC voltage V _AC according to a dimming level selected from a user. Since the triac dimmer is a known technique, a detailed description thereof will be omitted.

The switching current holding circuit 1205 is connected between the triac dimmer 1200 and the rectifying part 1220 and supplies a triac arc current to the alternating current power input or to the rectified voltage output or to a dummy load And a switching current holding circuit 1205 which is connected to the switching circuit. For example, the holding current holding circuit 1205 may be a bleeder circuit composed of a bleeder capacitor and a bleeder resistor connected in series. Here, the ignition current holding circuit 1205 according to the present invention is not limited to the bleeder circuit, and one of the voltage stabilizing circuits can be employed.

The rectifying unit 1220 rectifies the phase-modulated AC voltage to generate a driving voltage, and outputs the generated driving voltage. The rectifying unit 1220 is not particularly limited, and any one of various known rectifying circuits such as a full-wave rectifying circuit, a half-wave rectifying circuit, and the like can be used. For example, the rectifying unit 1220 may be a bridge full wave rectifying circuit composed of four diodes. The driving voltage generated from the rectifying unit 1220 is output to the dimming level controller 1240, the phase modulation reference setting unit 1250, the light emitting element group driving module 1280 and the light emitting device emitting unit 1400.

The light emitting device emitting unit 1400 includes a plurality of light emitting device groups. The plurality of light emitting element groups are sequentially emitted and extinguished. The light emitting device emitting unit 1400 is limited to the first to fourth light emitting device groups 1410 to 1440. However, the present invention is not limited thereto, and the number of the light emitting device groups can be variously changed. The first to fourth light emitting element groups 1410 to 1440 may have different forward voltage levels. For example, when the first to fourth light emitting element groups 1410 to 1440 each include a different number of light emitting elements, they have different forward voltage levels.

The dimming level control unit 1240 detects a currently selected dimming level based on the driving voltage provided from the rectifying unit 1220 and outputs the detected dimming level signal to the light emitting diode driving module 1300. More specifically, the dimming level controller 1240 according to the present invention can detect a dim level by averaging a driving voltage whose voltage level varies with time. Since the triaxial dimmer 1200 is configured to cut the phase of the alternating voltage V _AC according to the dimming level selected by the user, the currently selected dimming level can be detected when the driving voltage is averaged. The detected dim level signal may be a DC signal having a constant voltage value. For example, if the dim level is 100%, the corresponding dim level signal is 2V, the corresponding dim level signal is 1.8V when the dim level is 90%, and the corresponding dim level signal if the dim level is 50% 1V and so on. The dim level signal corresponding to the dim level can be changed into various circuit designs. An RC integration circuit or the like can be used.

The light emitting element driving module 1300 includes an internal power generation unit 1301, a light control level detection unit 1260, a driving level detection unit 1250, a bleeder current detection unit 1303, and a driving current control unit 1280.

The internal power generator 1301 supplies driving power for operating the respective components.

The dim level detection unit 1260 has a dim level reference value. The dimming level reference value may be preset and changed by the user. Specifically, the dimming level reference value may be set in a shortest driving period in which the first to fourth light emitting element groups 1410 to 1440 are all driven in a period where defects such as flicker occur or a low dimming level. For example, the dimming level reference value may be set in an interval in which the first to fourth light emitting element groups 1410 to 1440 are all driven.

The driving current controller 1280 compares the dimming level reference value and the dimming level signal Adim of the dimming level detector 1260 and outputs the dimming level signal Adim to the first to fourth The driving of the light emitting element groups 1410 to 1440 can be cut off.

The driving current controller 1280 controls the sequential driving of the first through fourth light emitting element groups 1410 through 1440 according to the voltage level of the driving voltage input from the rectifier 1220. That is, the AC driving light emitting device illumination device has first to seventh sections for sequentially driving the first to fourth light emitting element groups 1410 to 340. In the first period, the voltage level of the driving voltage input from the rectifier 1220 is defined as a period between the first forward voltage level and the second forward voltage level, and during the first period, only the first current path P ₁ And the first light emitting element group 1410 emits light. In the second period, the voltage level of the driving voltage inputted from the rectifier 1220 is defined as a period between the second forward voltage level and the third forward voltage level, and the second current path P ₂ Are connected to the first and second light emitting element groups 1410 and 1420 to emit light. In the third period, the voltage level of the driving voltage input from the rectifying unit 1220 is defined as a period between the third forward voltage level and the fourth forward voltage level, and during the third period, the third current path P ₃ Are connected to the first to third light emitting element groups 1410 to 1430 to emit light. In the fourth period, the voltage level of the driving voltage input from the rectifying unit 1220 is defined as a fourth forward voltage level period, and the fourth current path P ₄ is connected during the fourth period, And the four light emitting element groups 1410 to 1440 emit light. In the fifth period, the voltage level of the driving voltage input from the rectifier 1220 is defined as a period between the fourth forward voltage level and the third forward voltage level, and during the fifth period, the third current path P ₃ Are connected to the first to third light emitting element groups 1410 to 1430 to emit light. In the sixth period, the voltage level of the driving voltage inputted from the rectifier 1220 is defined as a period between the third forward voltage level and the second forward voltage level, and during the sixth period, the second current path P ₂ Are connected to the first and second light emitting element groups 1410 and 1420 to emit light. In the seventh period, the voltage level of the driving voltage input from the rectifier 1220 is defined as a period between the second forward voltage level and the first forward voltage level, and during the seventh period, the first current path P ₁ And the first light emitting element group 1410 emits light. The first and seventh sections may be defined as a first stage driving section, the second and sixth sections may be defined as a second stage driving section, and the third and fifth sections may be defined as a third stage driving section And the fourth section may be defined as the fourth section driving section.

The light emitting element driving module 1300 further includes a driving level detector 1250 for controlling driving current magnitudes of the first to fourth light emitting element groups 1410 to 1440 according to dim levels. The driving level detector 1250 may be proportionally set according to the dimming level. The driving level detector 1250 includes a driving current resist set in advance corresponding to the dimming level.

20 and 21, the driving method of the lighting apparatus of the AC driving light emitting element of the present invention generates an AC voltage phase-modulated by the triac dimmer 1220 according to the dimming level selected by the user's operation (S100)

The rectifying unit 1220 rectifies the phase-controlled AC voltage to generate a driving voltage, and outputs the generated driving voltage (S200)

The dimming level control unit 1240 detects a currently selected dimming level based on the driving voltage supplied from the rectifying unit 1220 and outputs the detected dimming level signal to the light emitting diode driving module 1300. S300)

The light emitting element driving module 1300 compares the light control level signal with the light control level reference value (S400). The light emitting element drive module 1300 compares the light control level signal with the light control level reference value, And stops driving the first to fourth light emitting element groups 1410 to 1440 when the light emitting element group is below the dimming level reference value. The light emitting element driving module 1300 provides a driving current corresponding to the light control level to at least one of the first to fourth light emitting element groups 1410 to 1440 when the light control level signal is equal to or higher than the light control level reference value (S500) Here, the light emitting element driving module 1300 compares the light control level signal with the light control level reference value during the driving period of the first to fourth light emitting element groups 1410 to 1440. [

The light emitting element driving module 1300 cuts off the driving currents supplied to the first to fourth light emitting element groups 1410 to 1440 when the dim level signal is less than the dimming level reference value at step S600. The light emitting element driving module 1300 compares the light control level signal with the light control level reference value during a period in which the driving of the first to fourth light emitting element groups 1410 to 1440 is stopped. Accordingly, the light emitting diode driving module 1300 of the present invention compares the dimming level signal with the dimming level reference value during the driving period and the driving stop period of the first to fourth light emitting element groups 1410 to 1440, The driving of the first to fourth light emitting element groups 1410 to 1440 can be controlled. The dimming level reference value may be defined as a minimum driving value for driving the first to fourth light emitting element groups 1410 to 1440. Accordingly, when the dim level signal is less than the minimum driving value for driving the first to fourth light emitting element groups 1410 to 1440, the driving current supplied to the first to fourth light emitting element groups 1410 to 1440 is cut off.

The present invention can prevent the non-uniform luminance including the flicker by blocking the driving currents of all the first to fourth light emitting element groups 1410 to 1440 at a light control level lower than a predetermined light control level reference value. In particular, the present invention relates to a light emitting device having a plurality of light emitting element groups sequentially driven by a plurality of light emitting element groups, each of the plurality of light emitting element groups including a flicker And non-uniform dimming characteristics can be improved.

In addition, the present invention can improve the dimming characteristics that vary according to the characteristics of the triaxial dimmer 1200 by blocking the driving currents of all of the first to fourth light emitting element groups 1410 to 1440 based on a preset dimming level reference value So that the compatibility of the dimmer can be improved.

As shown in FIG. 22, the light emitting element driving module 1300 of the present invention limits the supply period of the driving current supplied to the first to fourth light emitting element groups according to the light intensity level signal based on the dimming level reference value Alternatively, the magnitude of the driving current may be controlled, or the magnitude of the driving current and the driving current may be controlled to control the first to fourth light emitting element groups according to varying dimming characteristics.

23 is a waveform chart showing the relationship between the driving current and the bleeder current of the light emitting element group according to the dimming level change of the present invention, and FIG. 24 is a graph showing a pulse width modulated signal It is one waveform.

As shown in FIG. 23, in the lighting apparatus of the AC driving light emitting element of the present invention, the maximum value (100%) of the driving voltage dimming control input from the rectifying section is the maximum, the bleeder current is the holding current section at the maximum forward voltage section .

Further, in the lighting apparatus, in the Mid (50%) in which the driving voltage inputted from the rectifying section includes 50% dimming control, the bleeder current is generated in the latch current section from the time when the light emitting element driving current is supplied, The current section may extend from the latch section.

Further, in the lighting device, in the 20% section including the dimming control in which the driving voltage inputted from the rectifying section is 20%, the bleeder current is generated from the latch current section from the time when the light emitting element driving current is supplied, May extend from the latch section.

The above lighting apparatus can use a TRIAC dimmer as well as a pulse width modulation (PWM) dimmer. Referring to FIGS. 23 and 24, the lighting apparatus of the present invention can control a driving current supplied to the light emitting element group using a pulse width modulation (PWM) dimmer.

In the lighting apparatus of the present invention, the magnitude of the driving current of the light emitting element is controlled in proportion to the dimming level set by the user, so that the dimming characteristic is smooth over the dimming level. In addition, the lighting apparatus of the AC driving light emitting device of the present invention can reduce the driving current provided to all the light emitting element groups at a dim level lower than a predetermined dimming level reference value to improve flicker or non-uniform dimming characteristics. For example, the present invention can improve the flicker and non-uniform dimming characteristics by restricting the driving of all of the plurality of light emitting element groups in a section that is less than a preset light intensity level reference value (a section that gradually decreases in the fourth stage driving section). Here, the dimming level reference value may be set within a range of 90 to 0 based on the first period of the modulated AC voltage.

In addition, the present invention can improve the dimming characteristics that vary depending on the characteristics of the dimmer, thereby improving the compatibility of the dimmer.

FIG. 25 is a diagram showing a configuration of an AC driving light emitting device lighting device (hereinafter referred to as 'light emitting device lighting device') capable of color temperature control according to an embodiment of the present invention.

25, the lighting apparatus of the AC driving light emitting element capable of controlling the color temperature of the present invention includes a dimmer 2100, a lighting current holding circuit 2105, a rectifying unit 2120, a first dimming level detector 2140, A second driving light level detector 2141, a first driving module 2150, a second driving module 2160, and first and second light emitting device emitting units 2170 and 2180. The illuminating device of the light emitting device can control the color temperature according to the user's selection by using the dimmer 2100. That is, the present invention can change the color temperature by individually controlling the driving of the first and second light emitting element emitters 2170 and 2180 based on the alternating voltage modulated by the dimmer 2100.

The dimmer 2100 receives an AC voltage V _AC from an AC voltage source and generates and outputs an AC power that is modulated to a dim level selected by a user's operation of the inputted AC voltage V _AC . The dimmer 2100 includes a triac dimmer, a pulse width modulation (PWM) dimmer, and an analog voltage dimmer for changing the AC voltage by using TRIAC to phase-cut the AC power. , And dimmers equivalent thereto. That is, the dimmer 2100 generates / outputs the AC voltage modulated according to the selected dimming level, and outputs the dimming level selected by the dimming level detector 2140, which will be described later, from the AC voltage modulated by the dimmer 2100 Any dimmer can be used as long as the dimmer can be detected. Although the dimmer 2100 is a triaxial dimmer according to an embodiment of the present invention, the scope of the present invention is not limited thereto. As long as the gist of the present invention is included in the scope of the present invention, It will be obvious that embodiments using one are also within the scope of the present invention.

The dimmer 2100 receives an AC voltage V _AC from an AC voltage source and generates an AC voltage whose phase is modulated according to the dimming level selected by the user's operation of the inputted AC voltage V _AC . The dimmer 2100 generates a phase-controlled AC voltage by phase-cutting an _AC voltage V _AC according to a dimming level selected by the user. Here, since the triax dimmer is a known technique, a detailed description will be omitted.

The ignition current holding circuit 2105 is connected between the dimmer 2100 and the rectifier 2120 and supplies a triac arc current to the AC power input or to a rectified voltage output or to a dummy load And a switching current holding circuit 2105 which is connected to the switching circuit. For example, the holding current holding circuit 2105 may be a bleeder circuit composed of a bleeder capacitor and a bleeder resistor connected in series. Here, the ignition current holding circuit 2105 according to the present invention is not limited to the bleeder circuit, and one of the voltage stabilizing circuits may be adopted.

The rectifying unit 2120 rectifies the phase-modulated AC voltage to generate a driving voltage, and outputs the generated driving voltage. The rectifying unit 2120 is not particularly limited, and any one of a variety of known rectifying circuits such as a full-wave rectifying circuit and a half-wave rectifying circuit can be used. For example, the rectifying part 2120 may be a bridge full wave rectifying circuit composed of four diodes.

Each of the first and second dimming level detectors 2140 and 2141 detects the currently selected dimmer level based on the driving voltage supplied from the rectifier 2120 and outputs the first and second dimmer Level signals Adim1 and Adim2 to the first and second driving modules 2150 and 2160, respectively. More specifically, the first and second dimming level detectors 2140 and 2141 according to the present invention can detect a dim level by averaging a driving voltage whose voltage level varies with time. Since the dimmer 2100 is configured to cut the phase of the AC voltage V _AC according to the dimming level of the user's choice, the dimming level currently selected can be detected when the driving voltage is averaged. The first and second dimming level signals Adim1 and Adim2 may be a DC signal having a constant voltage value corresponding to the dimming level. The first and second dimming level signals (Adim1, Adim2) are inversely proportional to each other. For example, if the dim level is 80%, the first dim level signal (Adim1) is 1.8V corresponding to 80% dimming level and the second dim level signal (Adim2) ), Which is inversely proportional to 0.2V. The first dimming level signal Adim1 is 0.2V corresponding to a dimming level of 20% and the second dimming level signal Adim2 is the first dimming level signal Adim1 when the dim level is 20% RTI ID = 0.0 > 1.8V < / RTI > Here, when the dim level is 50%, the first dim level signal (Adim1) is 1.0V corresponding to 50% dimming level, and the second dim level signal (Adim2) is the first dim level signal Adim1). ≪ / RTI >

The first driving module 2150 controls the first light emitting device emitter 2170 in response to the first dimming level signal Adim1. For example, the first driving module 2150 sequentially drives the first light emitting diode groups LED1-1 to LED 1-4 during a plurality of periods (first to seventh intervals). In the first period, the voltage level of the driving voltage inputted from the rectifying unit 2120 is defined as a period between the first forward voltage level and the second forward voltage level, and during the first period, the first current path (P _1-1 Are connected to emit the 1-1 light emitting element group (LED1-1). In the second period, the voltage level of the driving voltage input from the rectifying unit 2120 is defined as a period between the second forward voltage level and the third forward voltage level, and during the second period, the second current path P _{1 -2} ) are connected and the 1-1 and 1-2 light emitting element groups (LED1-1, LED1-2) emit light. In the third period, the voltage level of the driving voltage inputted from the rectifying unit 2120 is defined as a period between the third forward voltage level and the fourth forward voltage level, and during the third period, the third current path P _{1 -3} ) are connected to emit light in the 1-1 to 1-3 light emitting element groups (LED1-1 to LED1-3). In the fourth period, the voltage level of the driving voltage input from the rectifying unit 2120 is defined as a fourth forward voltage level interval, and the fourth current path P _1-4 is connected during the fourth period, The light emitting element groups (LED1-1 to LED1-4) emit light. In the fifth period, the voltage level of the driving voltage input from the rectifying unit 2120 is defined as a period between the fourth forward voltage level and the third forward voltage level, and during the fifth period, the third current path P _{1 -3} ) are connected to emit light in the 1-1 to 1-3 light emitting element groups (LED1-1 to LED1-3). In the sixth period, the voltage level of the driving voltage inputted from the rectifier 2120 is defined as a period between the third forward voltage level and the second forward voltage level, and during the sixth period, the second current path P _{1 -2} ) are connected and the 1-1 and 1-2 light emitting element groups (LED1-1 and LED1-2) emit light. In the seventh period, the voltage level of the driving voltage inputted from the rectifier 2120 is defined as a period between the second forward voltage level and the first forward voltage level, and during the seventh period, the first current path P _{1 -1} ) are connected to emit light of the 1-1 light emitting element group (LED1-1). The first and seventh sections may be defined as a first stage driving section, the second and sixth sections may be defined as a second stage driving section, and the third and fifth sections may be defined as a third stage driving section And the fourth section may be defined as the fourth section driving section. Each of the first light emitting element groups (LED1-1 to LED 1-4) may have a different forward voltage level. For example, when the first light emitting element groups (LED1-1 to LED 1-4) include different numbers of light emitting elements, they have different forward voltage levels. The first light emitting device emitter 2170 may sequentially emit light corresponding to the AC voltage modulated in phase according to the first dimming level signal Adim1 of the first driving module 2150, Can be implemented.

The second driving module 2160 controls the second light emitting device emitter 2180 in response to the second dimming level signal Adim2. For example, the second driving module 2160 may sequentially drive the third light emitting device groups LED2-1 to LED2-4 during a plurality of periods (first to seventh intervals). The sequential drive of the second light emitting device emitter 2180 will not be described in detail with reference to the description of the first drive module 2150 and the first emitter light emitter 2170. The second driving module 2160 may further include a pulse width modulating unit (not shown). The second light emitting device emitter 2180 may be driven to correspond to a pulse width modulation signal from the second driving module 2160. For example, the second light emitting device emitter 2180 may include red LED light emitting devices, and may implement warm white.

The light emitting device illuminating device according to the embodiment of the present invention controls the driving of the first and second light emitting device emitters 2170 and 2180 according to the dimming level selected by the dimmer 2100, The color temperature can be controlled by controlling the driving ratios of the first light emitting device emitter 2170 and the second emitter device emitting light 2180 that realize warm white.

26 is a view showing a configuration of an AC driving light-emitting device illuminating device capable of color temperature control according to another embodiment of the present invention.

As shown in FIG. 26, the AC driving light emitting device illumination device capable of controlling the color temperature of the present invention includes a first rectifying part 2220, a first driving module 2250, and a first light emitting device emitting part 2270.

The illuminating device of the light emitting device includes a dimmer 2200, a second rectifying unit 2221, a dimming level detecting unit 2240, a second driving module 2260, and a second light emitting device emitter 2280.

The light emitting device illuminating device includes the first driving module 2250 for driving the first light emitting device emitter 2270 and the second light emitting device emitter 2280 according to a dimming level selected by the user The color temperature can be controlled by individually controlling the second drive module 2260 that drives the second drive module 2260. [ That is, the alternating voltage modulated by the dimmer 2200 (for example, the phase-modulated alternating voltage) may be supplied to the second light emitting device emitter 2280 for controlling the color temperature to change the color temperature. Here, the second light emitting device emitter 2280 may be a red light emitting device.

The first rectifier 2220 receives an AC voltage V _AC from an AC voltage source, rectifies the AC voltage to generate a driving voltage, and outputs the generated driving voltage. The first rectifying part 2220 is not particularly limited, and one of various known rectifying circuits such as a full-wave rectifying circuit, a half-wave rectifying circuit, and the like can be used. For example, the first rectification part 2220 may be a bridge full wave rectification circuit composed of four diodes.

The first driving module 2250 controls the first light emitting device emitter 2270 in response to a driving voltage input from the first rectifier 2220. For example, the first driving module 2250 sequentially drives the first light emitting diode groups LED1-1 to LED 1-4 during a plurality of periods (first to seventh intervals). The sequential driving of the first light emitting device emitters 2270 will be described in detail with reference to the light emitting device illuminating devices of the embodiment of the present invention.

The dimmer 2200 receives an AC voltage V _AC from an AC voltage source and generates an AC voltage whose phase is modulated according to a dimming level selected by a user's operation of the inputted AC voltage V _AC . Here, the dim level corresponds to the color temperature. The dimmer 2200 includes a triac dimmer, a pulse width modulation (PWM) dimmer, and an analog voltage dimmer that changes the ac voltage by using a TRIAC to phase- , And dimmers equivalent thereto. That is, the dimmer 2200 generates / outputs the AC voltage modulated according to the selected dimming level, and outputs the dimming level selected by the dimming level detector 2240, which will be described later, from the AC voltage modulated by the dimmer 2200 Any dimmer can be used as long as the dimmer can be detected. Although the dimmer 2200 is a triaxial dimmer according to an embodiment of the present invention, the scope of the present invention is not limited thereto. As long as the gist of the present invention is included in the scope of the present invention, It will be obvious that embodiments using one are also within the scope of the present invention.

The second rectifying unit 2221 rectifies the phase-modulated AC voltage to generate a driving voltage, and outputs the generated driving voltage. The second rectification part 2221 is not particularly limited, and one of various known rectification circuits such as a full-wave rectification circuit, a half-wave rectification circuit, and the like can be used. For example, the second rectification part 2221 may be a bridge full wave rectification circuit composed of four diodes.

The dimming level detector 2240 detects the currently selected dimmer level based on the driving voltage provided from the second rectifier 2221 and outputs a dim level signal Adim to the second driving module 2260). More specifically, the dimming level detector 2240 according to the present invention can detect a dim level by averaging a driving voltage whose voltage level varies with time. Since the dimmer 2200 is configured to cut the phase of the AC voltage V _AC according to the dimming level selected by the user, the dimming level currently selected can be detected when the driving voltage is averaged. The dim level signal (Adim) may be a DC signal having a constant voltage value corresponding to the dimming level.

The second driving module 2260 controls the second light emitting device emitter 2280 in response to the dimming level signal Adim. For example, the second driving module 2260 sequentially drives the second light emitting diode groups LED2-1 to LED2-4 during a plurality of periods (first to seventh intervals). The sequential driving of the second light emitting device emitter 2280 will be described in detail with reference to the light emitting device illuminator of the embodiment of the present invention. In another embodiment, the second driving module may include a pulse width modulation unit, and the second light emitting device emitting units may be connected to each other in series so as to be simultaneously driven, and the pulse width modulation signal from the pulse width modulation unit As shown in FIG. For example, the second light emitting device emitting unit may include red LED light emitting devices, and may implement warm white.

The light emitting device illuminating device according to another embodiment of the present invention controls the driving of the second light emitting device emitter 2280 according to the dimming level selected by the control of the dimmer 2200, The color temperature can be controlled by driving the element light emitting portion 2270 and controlling the driving of the second light emitting element emitting portion 2280 which implements warm white.

27 is a waveform diagram showing the relationship between the driving voltage and the driving current of the light-emitting device illuminating device of Fig.

As shown in FIG. 27, the light emitting device illuminating device according to another embodiment of the present invention receives an AC voltage V _AC from an AC voltage source, rectifies the _AC voltage V _AC , and in response to the generated driving voltage, . For example, the first light emitting device emitting section is sequentially driven during a plurality of sections (first to seventh sections) within one period.

Referring to the first LED current, the first light emitting device emitting unit is sequentially driven in one cycle.

On the other hand, the AC voltage Vp whose phase is modulated through the dimmer according to the user's selection can be divided into a plurality of sections (first to third sections) according to the phase-modulated magnitude. Here, the plurality of sections are not limited to the first to third sections, and may be divided into four or more sections. For example, a plurality of sub-intervals in the first to third intervals. In another embodiment of the present invention, the phases are classified into the low period, the mid period, and the high period according to the magnitude of the modulated phase.

And the second light emitting device emitting unit is sequentially driven in response to the driving voltage in which the phase-modulated AC voltage is rectified. Here, the second light emitting device emitting unit is varied in the ON duration and the current level magnitude according to the phase-modulated magnitude.

Referring to the second LED current, it can be seen that the ON period and the current level magnitude vary depending on the magnitude of the phase modulated in one period of the second light emitting device emitting unit.

28 is a diagram illustrating a configuration of a light emitting device illumination device capable of color temperature control according to another embodiment of the present invention.

28, the light emitting device illuminating apparatus according to another embodiment of the present invention includes first and second dimmers 2300 and 2301, first and second rectifying sections 2320 and 2321, Second dimming level detection units 2340 and 2341, first and second driving modules 2350 and 2360, and first and second light emitting device emitting units 2370 and 2380. The illuminating device of the light emitting device can control the luminance and color temperature according to the user's selection by using the first and second dimmers 2300. That is, the present invention can change the luminance by controlling the driving of the first light emitting device emitting portion 2370 based on the alternating voltage modulated by the first dimmer 2300. Here, the first light emitting device emitter 2370 may include a blue LED light emitting device and a yellow fluorescent material to realize white.

The color temperature can be changed by controlling the driving of the second light emitting element emitter 2380 based on the alternating voltage modulated by the second dimmer 2301. Here, the second light emitting device emitting unit 2380 may be a red LED emitting device.

The first and second driving modules 2350 and 2360 optionally include a function of enabling and disabling the dimming control function.

The first and second dimmers 2300 and 2301, the first and second rectifying sections 2320 and 2321, the first and second dimming level detecting sections 2340 and 2341, the first and second driving modules 2350 and 2360 ), And the first and second light emitting device emitting units 2370 and 2380 will not be described in detail with reference to the light emitting device illuminating apparatus of the embodiment of the present invention.

The light emitting device illuminating apparatus according to another embodiment of the present invention controls the driving of the first light emitting device emitter 2370 according to the dimming level selected by the control of the first dimmer 2300, And the color temperature can be controlled by controlling the driving of the second light emitting device emitter 2380 according to the dimming level selected by the control of the second dimmer 2301. [

Although various embodiments have been described above, the present invention is not limited to the specific embodiments. In addition, the elements described in the specific embodiments may be applied to the same or similar elements in other embodiments without departing from the spirit of the present invention.

1000: Light emitting device illumination device
100: Dimmer 105: Closing current circuit
110: EMI filter 120: rectification part
130: surge protection unit 140: dimming level detection unit
200: light emitting element driving module 300: light emitting element emitting part
210: light emitting element driving control part 220: light emitting element group driving part
UVLO: Undervoltage shutoff circuit 540: Temperature control

Claims (67)

A dimmer that receives an AC power and controls an AC power input according to a selected dimming level to generate and output a controlled AC power;
A rectifier for receiving and controlling the AC power outputted from the dimmer to generate and output a driving voltage;
A light control level detector for detecting the selected light control level by receiving the driving voltage and outputting the detected light control level signal;
A first light emitting element group to a nth light emitting element group (n is a positive integer of 2 or more) each including one or more light emitting elements each of which is sequentially driven according to the control of the light emitting element driving module upon receiving the driving voltage; And
The driving voltage control unit controls the sequential driving of the first to nth light emitting element groups according to the determined voltage level of the driving voltage and controls the driving current of the light emitting element based on the dimming level signal And a light emitting element driving module for controlling a constant current.
The method according to claim 1,
Wherein the light emitting element driving module determines a reference value of the light emitting element driving current in proportion to the magnitude of the dimming level signal and controls a maximum value of the light emitting element driving current based on the determined reference value. Lighting device.
The method according to claim 1,
Wherein the light emitting element driving module controls the magnitude of the light emitting element driving current differently for each driving period.
The method of claim 3,
Wherein the light emitting element driving module controls the nth light emitting element driving current to sequentially increase from the first light emitting element driving current for the first driving period to the nth driving period for the nth driving period. .
The method according to claim 1,
Wherein the dimmer is a TRIAC dimmer.
The method of claim 5,
The above-described dimmable AC-driven light emitting device illumination device includes:
A switching current holding circuit connected between the triax dimmer and the rectifying section for supplying a TRIAC trigger current to the AC power input or to a rectified voltage output or operating a dummy load, Further comprising: a light-emitting diode (LED).
The method of claim 6,
Wherein the ignition current holding circuit is a bleeder circuit.
The method of claim 5,
Wherein the dimmer-capable AC driving light-emitting device illuminating device further comprises a noise filter (EMI filter) connected between the dimmer and the rectifying part to attenuate high-frequency noise of the phase-controlled AC power. .
The method according to claim 1,
Wherein the dimming-capable AC driving light-emitting device illuminating device further comprises a surge protecting part connected to an output end of the rectifying part to protect the circuit.
The method according to claim 1,
Wherein the dimming level detector detects a dim level by averaging the driving voltage.
The method of claim 10,
Wherein the dimming level detector comprises an RC integrator circuit.
The method of claim 10,
Wherein the dimming level detecting unit further includes a voltage limiting circuit for limiting the driving voltage to a maximum voltage or less.
The method according to claim 1,
Wherein the dimming level detecting unit is incorporated as an rms converter in the light emitting element driving module to convert the driving voltage into a DC signal.
The method according to claim 1,
Wherein the light emitting element driving module is capable of selectively enabling and disabling the dimming control function.
15. The method of claim 14,
Wherein the light emitting element driving module further comprises an automatic sensing circuit for sensing whether or not the dimming circuit is connected and automatically selecting the allowance and inhibition of the dimming control function.
The method according to claim 1,
The dimmer-capable AC-driving light-emitting-device illumination device includes:
Further comprising a driving voltage stabilizing part for reducing and stabilizing the driving voltage supplied to the light emitting element driving module.
The method of claim 7,
Wherein the bleeder circuit is an active bleeder,
The light emitting element driving module includes a bleeder terminal; And
And a bleeder resistor connected to the bleeder terminal.
The method according to claim 1,
And the light emitting element driving module includes a low voltage blocking circuit.
The method according to claim 1,
Wherein the light emitting element driving module includes a temperature control unit,
The temperature control unit detects the temperature of the light emitting element driving module and compares the detected temperature with at least two reference temperatures to stop or allow the driving of the light emitting element driving module, Wherein the reference temperatures are different from each other.
The method of claim 19,
Wherein the at least two reference temperatures include first and second reference temperatures,
The temperature control unit may be configured such that the first reference temperature has a temperature lower than the second reference temperature,
Allowing the light emitting element driving module when the detected temperature is equal to or lower than the first reference temperature,
And stops the light emitting element driving module when the detected temperature is equal to or higher than the second reference temperature.
The method of claim 20,
And the temperature of the light emitting element driving module is maintained at a resting state until the first reference temperature after the light emitting element driving module is stopped by the detected temperature.
The method according to claim 1,
Wherein the light emitting element driving module comprises: a minimum voltage level correcting unit for compensating for a rise of a driving voltage level in a minimum interval of a rated voltage; And
And a maximum voltage level correcting unit for compensating for a decrease in the level of the driving voltage in a maximum interval of the rated voltage.
The method according to claim 1,
Wherein the light emitting element driving module is configured such that a variable resistor for varying the light emitting element driving current levels of the first to n < th >
A full-wave rectification section for full-wave rectifying an AC voltage;
An LED light emitting module driven by a full-wave rectified driving voltage from the full wave rectification part; And
And an LED driving module for controlling the LED light emitting module,
Wherein the LED light emitting module includes a plurality of LED groups, the plurality of LED groups each including a capacitor connected in parallel, and a diode connected between the plurality of LED groups.
27. The method of claim 24,
Wherein the capacitor is in one-to-one correspondence with the plurality of LED groups.
27. The method of claim 24,
And the diode is forward-connected between the plurality of LED groups.
27. The method of claim 24,
And a valley-fill circuit connected between the full wave rectification section and the LED light emitting module.
27. The method of claim 24,
Wherein the plurality of LED groups includes first to fourth LED groups,
The first through fourth LED groups are forward-connected,
Wherein the capacitor includes first to fourth capacitors,
Wherein the first LED group and the first capacitor are connected in parallel between an input terminal of the full wave rectification section and the second LED group.
29. The method of claim 28,
And the second LED group and the second capacitor are connected in parallel between the first LED group and the third LED group.
29. The method of claim 28,
And the third LED group and the third capacitor are connected in parallel between the second LED group and the fourth LED group.
29. The method of claim 28,
And the fourth LED group and the fourth capacitor are connected in parallel between the third LED group and the LED driving module controlling the fourth LED group.
29. The method of claim 28,
The diode includes first to third diodes,
Wherein the first diode is serially connected between the first and second LED groups,
The second diode being serially connected between the second and third LED groups,
And the third diode is connected in series between the third and fourth LED groups.
29. The method of claim 28,
Wherein the LED driving module includes a first constant current driving circuit and a first resistor connected to the first LED group,
And a first Zener diode for stable constant current driving of the first constant current driving circuit.
34. The method of claim 33,
Wherein the LED driving module includes a second constant current driving circuit and a second resistor connected to the second LED group,
And a second zener diode for stable constant current driving of the second constant current driving circuit.
35. The method of claim 34,
Wherein the LED driving module includes a third constant current driving circuit and a first resistor connected to the third LED group,
And a third zener diode for stable constant current driving of the third constant current driving circuit. 36. The method of claim 35,
Wherein the LED driving module includes a fourth constant current driving circuit and a fourth resistor connected to the fourth LED group,
And a fourth Zener diode for stable constant current driving of the fourth constant current driving circuit.
37. The method of claim 36,
Wherein the first to fourth resistors are different in magnitude from each other. 37. The method of claim 36,
Wherein the first to fourth resistors have the same size.
A triac dimmer that modulates the phase of the ac power according to the selected dim level to generate a modulated ac voltage;
A rectifying part for full-wave rectifying the phase-modulated AC voltage from the triac dimmer to generate a driving voltage;
A light control level detector for detecting a light control level according to the driving voltage;
A phase modulation reference setting unit for setting a phase modulation reference value to be compared with the detected dimming level; And
And a light emitting element driving module for performing constant current control on the plurality of light emitting element groups by comparing the detected dimming level with the phase modulation reference value,
Wherein the light emitting device driving module includes a light emitting device current cutoff unit that cuts off a driving current supplied to the plurality of light emitting device groups when the dim level is lower than the phase modulation reference value.
42. The method of claim 39,
Wherein the plurality of light emitting element groups are sequentially driven in first to n < th >
41. The method of claim 40,
Wherein the phase modulation reference value is set within the n-th stage driving period in which the plurality of light emitting element groups are all driven.
42. The method of claim 39,
Wherein the light-emitting device current interruption unit simultaneously blocks driving currents supplied to all the plurality of light-emitting element groups.
42. The method of claim 38,
Wherein the light emitting element driving module further comprises a comparator for comparing the detected dimming level with the phase modulation reference value.
42. The method of claim 38,
Wherein the light emitting element driving current setting unit further includes a driving current control unit for controlling driving current magnitudes of the plurality of light emitting element groups according to dimming levels.
45. The method of claim 44,
Wherein the driving current control unit includes a driving current register that is proportionally set according to the dimming level.
42. The method of claim 39,
A switching current holding circuit connected between the triax dimmer and the rectifying section for supplying a TRIAC trigger current to the AC power input or to a rectified voltage output or operating a dummy load, Further comprising:
47. The method of claim 46,
Wherein the ignition current holding circuit is a bleeder circuit.
A dimmer for modulating the input AC voltage according to the selected dimming level;
A rectifier for full-wave rectifying the modulated AC voltage output from the dimmer to generate and output a driving voltage;
A first and a second dimming level detector for receiving the driving voltage of the rectifier to detect the selected dimmer level and outputting first and second dimmer levels according to the detected dimmer level;
A first driving module for controlling the first light emitting device emitting unit using the first dimming level signal of the first dimming level detecting unit; And
And a second driving module for controlling the second light emitting device emitting unit using the second dimming level signal of the second dimming level detecting unit,
Wherein the first and second light emitting devices are driven in inverse proportion to each other.
49. The method of claim 48,
Wherein the first and second dimming level signals are DC signals having a constant voltage value in inverse proportion to each other.
49. The method of claim 48,
Wherein the first driving module sequentially drives the first light emitting device emitters for a plurality of periods according to the modulated AC voltage.
49. The method of claim 48,
Wherein the second driving module sequentially drives the second light emitting device emitters for a plurality of periods according to the modulated AC voltage.
49. The method of claim 48,
Wherein the second driving module further comprises a pulse width modulating unit for generating a pulse width modulated signal and the second light emitting device emitting unit is driven by the pulse width modulated signal.
49. The method of claim 48,
The dimmer may be any one of a triac dimmer, a pulse width modulation (PWM) dimmer, and an analog voltage dimmer for changing the phase of an AC power source using a TRIAC Emitting device.
49. The method of claim 48,
And the second light emitting device emitting part includes a red LED light emitting device.
A first rectifying unit for full-wave rectifying an AC voltage input from an AC voltage source to generate and output a first driving voltage;
A first driving module for sequentially driving the first light emitting device emitters in response to the first driving voltage;
A dimmer that modulates an AC voltage input from the AC voltage source according to a selected dimming level;
A second rectifying unit for full-wave rectifying the modulated AC voltage output from the dimmer to generate and output a second driving voltage;
A dimming level detector for detecting the selected dimming level by receiving the driving voltage of the second rectifier and outputting a dim level signal according to the detected dim level; And
And a second driving module for controlling the second light emitting device emitting unit using the dimming level signal of the dimming level detecting unit.
55. The method of claim 55,
Wherein the second driving module sequentially drives the second light emitting device emitters for a plurality of periods according to the modulated AC voltage.
55. The method of claim 55,
Wherein the second driving module further comprises a pulse width modulating unit for generating a pulse width modulated signal and the second light emitting device emitting unit is driven by the pulse width modulated signal.
55. The method of claim 55,
The dimmer may be any one of a triac dimmer, a pulse width modulation (PWM) dimmer, and an analog voltage dimmer for changing the phase of an AC power source using a TRIAC Emitting device.
55. The method of claim 55,
Wherein the dimmer is a triaxial dimmer and is divided into a plurality of sections according to a magnitude of a phase modulated.
55. The method of claim 55,
And the second light emitting device emitting part includes a red LED light emitting device.
A first dimmer that modulates the AC voltage input from the AC voltage source according to the selected dimming level,
A first rectifier for full-wave rectifying the AC voltage modulated from the first dimmer to generate and output a first driving voltage;
A first dimmer level detector for detecting the selected dimmer level by receiving the first driving voltage of the first rectifier and outputting a first dimmer level signal according to the detected dimmer level;
A second driving module for sequentially driving the first light emitting device emitters in response to the first dimming level signal;
A second dimmer that modulates an AC voltage input from the AC voltage source according to a selected dimming level;
A second rectifier for full-wave rectifying the modulated AC voltage output from the second dimmer to generate and output a second driving voltage;
A second dimming level detector for receiving the driving voltage of the second rectifier to detect the selected dimming level and outputting a second dimmer level signal according to the detected dimmer level; And
And a second driving module for controlling the second light emitting device emitting unit using the second dimming level signal.
62. The method of claim 61,
Wherein the second driving module sequentially drives the second light emitting device emitters for a plurality of periods according to the modulated AC voltage.
62. The method of claim 61,
Wherein the second driving module further comprises a pulse width modulating unit for generating a pulse width modulated signal and the second light emitting device emitting unit is driven by the pulse width modulated signal.
62. The method of claim 61,
The first and second dimmers include a triac dimmer, a pulse width modulation (PWM) dimmer, and an analog voltage dimmer that changes the alternating voltage by using a TRIAC. Dimmer).
62. The method of claim 61,
Wherein the first and second dimmers are triac dimmers and are divided into a plurality of sections according to a magnitude of a phase modulated.
62. The method of claim 61,
And the second light emitting device emitting part includes a red LED light emitting device.
60. The method of claim 49 or 61,
Wherein the plurality of sections includes a Low section, a Mid section, and a High section, and each of the Low section, the Mid section, and the High section includes at least one or more sub sections.

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