KR20150025288A - Lighting Apparatus for Removing Residual Light of Light Emitting Module - Google Patents

Abstract

The present invention relates to a lighting apparatus for removing residual light of a light emitting module. The lighting apparatus for removing residual light of a light emitting module includes: a rectifier which rectifies AC power to generate DC power; a light emitting module including at least one light emitting module unit serially connected to each other and to receive current necessary in light emission from the DC power; a current driver which receives DC power from the rectifier to control on/off of at least one of light emitting module units; and at least one charge/discharge device. The charge/discharge device includes a residual light removing unit connected in parallel to both ends of the different light emitting module units among the light emitting module.

Description

Technical Field [0001] The present invention relates to a lighting apparatus for removing residual light of a light emitting module,

An embodiment of the present invention relates to a light emitting device illumination device for removing residual light of a light emitting module. More particularly, the present invention relates to a light emitting device lighting device that removes residual light from a light emitting module, which may be caused by a parasitic capacitance existing in a light emitting device lighting device, ≪ / RTI >

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

LED (Light Emitting Diode) is a bipolar device that emits light. Due to its fast response, low power consumption, and semi-permanent lifetime, it is used in various fields such as LCD backlight, LED traffic light and LED lighting have.

The LED light emitting unit is generally provided with a DC voltage for illumination, and a DC voltage is generated by full-wave rectification of a general household AC power source. The power source in which the AC AC voltage is full-wave rectified is connected to the LED light emitting unit, and the power source rectified is also used as a power source of the LED current driving unit for controlling the LED light emitting unit.

The LED current driver controls a current of a proper magnitude in consideration of a power factor or a desired light emitting current with respect to the light emitting portion in accordance with the full-wave rectified power source.

In this case, a heat is generated in the LED light emitting unit and the LED current driving unit constituting the LED lighting device, and a metal PCB is used to mount the LED light emitting unit and the LED current driving unit for heat dissipation. If a PCB is used, place a heat radiation pattern on the PCB. For this reason, there is a relatively large parasitic capacitance between each constituent node and the GND node constituting the LED lighting device on the PCB, which may adversely affect the operation of the LED lighting apparatus.

According to the embodiment of the present invention, it is possible to remove the residual light of the light emitting element, which may be caused by the parasitic capacitance existing in the light emitting device illuminating device, according to the change of the magnitude of the power source voltage inputted to the light emitting device constituting the light emitting device illuminating device The light emitting device lighting device according to the present invention has a main purpose.

According to an embodiment of the present invention, there is provided a light emitting device lighting apparatus for removing residual light, comprising: a rectifying unit for rectifying an AC power source to generate a DC power source; A light emitting module unit including at least one light emitting module unit connected in series and supplied with a current required for light emission from the direct current power supply; A current driver for receiving a DC power from the rectifying unit and controlling ON / OFF of at least one of the one or more light emitting module units; And one or more charging / discharging elements, wherein the one or more charging / discharging elements include residual light eliminating portions connected in parallel to both ends of different ones of the one or more light emitting module units. A light emitting device illumination device for removing light is provided.

Here, it is preferable that the charging / discharging devices are connected to each of all the light emitting module units in parallel.

The charging and discharging element may include at least one of a resistive element, a capacitive element, a rectifying diode and a switching element. When the charging and discharging element includes a resistive element, the magnitude of the resistance value of one of the resistive elements May be larger than the size of the forward equivalent resistance of the parallel-connected light emitting module unit when the light emitting module unit connected in parallel to any one of the resistive elements is turned on.

The resistance value of any one of the resistive elements may be smaller than a forward equivalent resistance of the parallel-connected light emitting module units when the parallel-connected light emitting module units are turned off.

The charge / discharge device may include a capacitor. In this case, the impedance magnitude of one of the capacitors according to the frequency of the direct current power source is determined by the impedance of the capacitors connected in parallel It may be larger than the size of the forward equivalent resistance of the light emitting module unit.

The impedance of any one of the capacitors may be smaller than the forward equivalent resistance of the parallel-connected light emitting module units when the parallel-connected light emitting module units are turned off.

According to another aspect of the present invention, there is provided a light emitting device lighting apparatus for removing residual light, comprising: a first rectifying unit for rectifying AC power to generate a first DC power; A second rectifying unit rectifying the AC power to generate a second DC power; A light emitting module unit including at least one light emitting module unit connected in series and supplied with a current required for light emission from the first direct current power supply; And a current driver for controlling on / off of at least one of the one or more light emitting module units by receiving second DC power from the second rectifying unit. And a light emitting device.

The light emitting device illuminating device may further include a capacitor connected in parallel to both ends of the output of the second rectifying unit.

According to the embodiment of the present invention, the residual light of the light emitting device, which may be generated by the parasitic capacitance existing in the light emitting device illuminating device, is removed according to the change of the magnitude of the power supply voltage inputted to the light emitting device constituting the light emitting device illuminating device There are advantages to be able to.

1 is a view showing an AC direct lighting type LED lighting apparatus 100 according to an embodiment of the present invention.
2 is a diagram illustrating the configuration of the current driving unit 130. As shown in FIG.
3 illustrates the reason why the light emitting module unit 120 is not completely extinguished by the charging / discharging current of the parasitic capacitor of the PCB when the current driving unit 130 controls the driving current of the light emitting module unit 120 to be 0 FIG.
4 is a schematic diagram of a residual light removing unit 440 constituted of residual light removing capacitors C _r1 , C _r2 , C _r3 , and C _r4 as charge / discharge elements in an AC direct lighting type LED lighting apparatus 100 according to an embodiment of the present invention. Fig.
FIG. 5 is a _graph showing the charge / discharge operation of the parasitic capacitors C _p1 , C _p2 , C _p3 , C _p4 and C _p5 and the residual light removing capacitors C _r1 , C _r2 , C _r3 and C _r4 in the circuit of FIG. Fig.
6 is a diagram showing an equivalent circuit of the first light emitting module unit 121 when N LED elements included in the first light emitting module unit 121 are in a conduction mode.
7 is a schematic diagram illustrating a residual light removing unit 640 composed of resistive elements (R ₁ , R ₂ , R ₃ , and R ₄ ) as charge / discharge elements in an AC direct LED lighting apparatus 100 according to an embodiment of the present invention And FIG.
8 is a _graph showing the relationship between the charge and discharge operations of the parasitic capacitors C _p1 , C _p2 , C _p3 , C _p4 and C _p5 and the residual light removing resistors R ₁ , R ₂ , R ₃ and R _{4 in} FIG. And FIG.
9 is a view showing an AC direct lighting type LED lighting apparatus 900 according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

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

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

1 is a view showing an AC direct lighting type LED lighting apparatus 100 according to an embodiment of the present invention.

1, an AC direct lighting type LED lighting apparatus 100 according to an embodiment of the present invention may include a rectifying unit 110, a light emitting module unit 120, and a current driving unit 130, In some cases, some components may be omitted or other components may be added.

The rectifying unit 110 rectifies the AC power source 101 to generate a DC power source. Here, the rectifying unit 110 may generate DC power through full-wave rectification or half-wave rectification, but for the sake of convenience, only DC power generation by full-wave rectification will be described below.

The light emitting module unit 120 includes one or more light emitting module units 121, 122, 123 and 124 connected in series and is supplied with a current required for light emission by a DC power source generated from the rectifying unit 110. That is, the light emitting module unit 120 includes a first light emitting module unit 121, a second light emitting module unit 122, a third light emitting module unit 123 and a fourth light emitting module unit 124. Although the number of the light emitting module units 121, 122, 123, and 124 constituting the light emitting module unit 120 is four in the above description, the present invention is not limited thereto and one or more various numbers of the light emitting module units may be used .

Each of the light emitting module units 121, 122, 123, and 124 includes at least one LED (light emitting diode) element. For example, the first light emitting module unit 121 includes three LED elements 121a, 121b and 121c. 1, three LED elements are included in each of the light emitting module units 121, 122, 123 and 124. However, the present invention is not limited thereto, and one or more various numbers of LED elements may be connected to the light emitting module units 121 and 122 , 123 and 124, respectively.

One or more LED elements 121a, 121b, and 121c included in one light emitting module unit 121, 122, 123, and 124 may be connected in series or in parallel, or may be connected in series and in parallel. have.

One end of the light emitting module part 120 is connected to the (+) output terminal of the rectifying part 110 and the other end of the light emitting module part 120 is connected to the current driving part 130. The light emitting module units 121, 122, 123 and 124 constituting the light emitting module unit 120 are connected in series to each other and the contacts between the light emitting module units 121, 122, 123, (Not shown).

The current driver 130 receives DC power from the rectifier 110 and controls ON / OFF of one or more of the light emitting module units 121, 122, 123 and 124.

2 is a diagram illustrating the configuration of the current driving unit 130. As shown in FIG.

As shown in FIG. 2, the current driving unit 130 may include one or more driving current units 131, 132, 133, and 134 and a control unit 135.

The control unit 135 controls the currents of the driving current portions 131, 132, 133, and 134 by receiving the DC power (i.e., rectified power) generated by the rectifying unit 110.

The DC power source rectified and output by the rectifying unit 110 is supplied to the light emitting module unit 120 and used as a power source voltage of the current driving unit 130. The current driving unit 130 is connected to each of the light emitting module units 121, 122, 123, and 124 in consideration of the power factor of the AC direct lighting type LED lighting apparatus 100 or the desired light emitting current in accordance with the voltage of the direct current power, 132, 133, and 134 so that the current flowing in the driving current units 131, 132, 133, and 134 can flow at an appropriate magnitude.

For example, when the current flows in the first driving current portion 131 and the current flows in the second to fourth driving current portions 132, 133, and 134, a driving current is supplied only to the first light emitting module unit 121 And the driving current is not supplied to the remaining light emitting module units 122, 123, and 124. In a similar manner, the control unit 135 controls the driving current portions 131, 132, 133, and 134 so that the current selectively flows to the remaining light emitting module units 122, 123, and 124.

2 is a diagram illustrating the operation of the current driving unit 130. The current driving unit 130 is not limited to the configuration shown in FIG. 2, and the operation of the light emitting module unit 120 can be controlled in various ways have.

As described above, a metal PCB may be used to prevent heat from being generated in the light emitting module units 121, 122, 123, and 124 and the current driving unit 130, or a heat radiation pattern may be used in a general PCB . By using this method, parasitic capacitance is relatively large between each of the constituent nodes constituting the LED lighting device on the PCB and the GND node, which negatively affects the operation of the AC direct lighting type LED lighting apparatus 100 Lt; / RTI >

In addition, it is general that the brightness of the LED lighting is required to be adjusted. In the case of adjusting the brightness of the LED lighting, the brightness of the LED must be adjustable from the rated brightness to the complete lighting. In addition, there is a case where the light emitting module unit 120 is completely turned off to protect the AC direct lighting type LED lighting apparatus 100 from various malfunctioning conditions of LED elements such as temperature.

However, due to the characteristics of the LED elements constituting each of the light emitting module units 121, 122, 123 and 124, the LED elements are not completely turned off even in the leakage current of several hundred nA, so that the residual light may exist.

In the present embodiment, the expression "removal of residual light" is used. However, when the size of the residual light generated in the light emitting module units 121, 122, 123 and 124 remains negligible, Since the effect is the same as the effect of removing light, we use expressions such as "remove residual light" or "light off".

Parasitic capacitors having parasitic capacitances may equally exist in each constituent node Node on the PCB on which the AC direct LED lighting apparatus 100 is mounted. If the voltage of the output terminal of the rectifying part 110 is generated by a slight resistive load and the ripple voltage is generated (that is, when the output voltage has a large amplitude), the light emitting module units 121 and 122 123, and 124 are turned off, the LED elements constituting the light emitting module units 121, 122, 123, and 124 may not be completely extinguished by the charge / discharge current of the parasitic capacitor, so that the residual light may exist. Such residual light is not adjustable in the current driver 130.

3 illustrates the reason why the light emitting module unit 120 is not completely extinguished by the charging / discharging current of the parasitic capacitor of the PCB when the current driving unit 130 controls the driving current of the light emitting module unit 120 to be zero Fig.

3, R _eq (the equivalent resistance of the current driving unit 130) represents the bias current of the current driving unit 130 with respect to the input voltage of the current driving unit 130 as an equivalent resistance. Due to the presence of R _eq , the ripple is generated even when the driving current of the light emitting module unit 120 is controlled to 0 with respect to the output voltage of the rectifying unit 110.

Even when the current driving unit 130 controls the driving current of the light emitting module unit 120 to be 0, ripple is generated in the output voltage of the rectifying unit 110. Therefore, during the increase of the output ripple voltage of the rectifying unit 110, The parasitic capacitors C _p1 , C _p2 , C _p3 , C _p4 and C _p5 are charged. The charging current flows through the light emitting module units 121, 122, 123 and 124 while the parasitic capacitors C _p1 , C _p2 , C _p3 , C _p4 and C _p5 are charged, And 124, respectively.

On the other hand, reverse Ricky the parasitic capacitors (C _p1, C _p2, C _p3, C _p4, C _p5) the by the charge each of the light emitting module unit (121, 122, 123, 124) filled in while the ripple voltage is reduced if (Leakage) current is discharged.

When the driving current of the light emitting module unit 120 is controlled to be 0, the parasitic capacitors C _p1 , C _p2 , C _p3 , C _p4 , C the charge and discharge are repeated periodically to _p5). 3, the charging / discharging current of the parasitic capacitor flows much more in the light emitting module unit closer to the (+) output terminal of the rectifying unit 110, and the residual light is larger than the light emitting module unit distant from the output terminal of the rectifying unit 110 appear.

In order to completely turn off the light emitting module unit 120, a separate switch for disconnecting the input power may be used. However, in this case, since the power of the current driving unit 130 is also cut off, the current driving unit 130 There is a problem that the light emitting module unit 120 can not be controlled.

Another method of removing residual light is to prevent the output voltage of the rectifying part 110 from being jarred by the equivalent resistance load R _eq when a large value capacitor is connected in parallel to the output terminal of the rectifying part 110 However, this causes a problem that the operation power factor of the AC direct lighting type LED lighting apparatus 100 is significantly lowered.

Therefore, in the AC direct lighting type LED lighting apparatus 100, when the driving current of the light emitting module unit 120 is made 0 in the current driving unit 130, the light emitting module unit 120 can be completely extinguished If the current driving unit 130 controls the current to flow again in the light emitting module unit 120, the current driving unit 130 can be reduced to a normal lighting state.

4 is a schematic diagram of a residual light removing unit 440 constituted of residual light removing capacitors C _r1 , C _r2 , C _r3 , and C _r4 as charge / discharge elements in an AC direct lighting type LED lighting apparatus 100 according to an embodiment of the present invention. Fig.

On the other hand, the charge and discharge element may include at least one of a resistive element and a capacitive element. For example, as the charging and discharging element, there can be used a resistance element, a capacitor, a rectifying diode and other switching elements which do not affect the normal lighting operation and can flow current.

As shown in FIG. 4, the residual photodetector 440 includes residual light removing capacitors C _r1 , C _r2 , C _r3 , and C _r4 as one or more charge / discharge elements, and the residual light removing capacitors C _r1 , C _r2 , C _r3 , and C _r4 are connected in parallel at both ends of different light emitting module units among the one or more light emitting module units 121, 122, 123, and 124.

The capacitance values of the remaining light removing capacitors C _r1 , C _r2 , C _r3 , and C _r4 are sufficiently small to the extent that residual light from the light emitting module 120 can be removed.

FIG. 5 is a _graph showing the charge / discharge operation of the parasitic capacitors C _p1 , C _p2 , C _p3 , C _p4 and C _p5 and the residual light removing capacitors C _r1 , C _r2 , C _r3 and C _r4 in the circuit of FIG. Fig.

5, when the current driving unit 130 controls the driving current flowing through the light emitting module units 121, 122, 123, and 124 to be zero, while the output ripple voltage of the rectifying unit 110 increases, (C _p1 , C _p2 , C _p3 , C _p4 , C _p5 ).

In this case, the first parasitic capacitors (C _p1) remaining parasitic capacitor (C _p2, C _p3, C _p4, C _p5) is removed, that the charge path of the residual light capacitor (C _r1, C _r2, C _r3, C _r4), except The current flowing to the light emitting module units 121, 122, 123 and 124 is removed to set the capacitances of the remaining light removing capacitors C _r1 , C _r2 , C _r3 and C _r4 to be charged through the light emitting module units 121, 122, 123, and 124 can be completely turned off.

Thus, even when the current driving unit 130 controls the driving current flowing through the light emitting module units 121, 122, 123, and 124 to be zero, the parasitic capacitors C _p1 , C _r2 , C _r3 , and C _r4 ) that are generated by repeating charging and discharging with respect to each of the remaining light-removing capacitors C _r1 , C _p2 , C _p3 , C _p4 , and C _p5 .

When the light emitting module units 121, 122, 123 and 124 operate under the control of the current driving unit 130 to operate normally (that is, conduct), the remaining light removing capacitors C _r1, C _r2, C _r3, C when using a sufficiently small value, the amount of _r4), the commercial AC power source (remaining light removal capacitor (C _r1 at the frequency 120 Hz of the rectified voltage for 60 Hz), C _r2, C _r3 and C _r4 act substantially as an open circuit and may not affect the normal lighting operation of the light emitting module units 121, 122, 123 and 124.

The impedance of the remaining light removing capacitors C _r1 , C _r2 , C _r3 and C _r4 according to the frequency of the DC power source is determined by the impedance of the light emitting module units 121, 122, 123, The capacitance capacity is set so as to be much larger than the size of the forward equivalent resistance of the light emitting module units 121, 122, 123, and 124 when the light emitting module units 121, 122, 123, and 124 are normally turned on.

For example, the first remaining light removal capacitor capacity (C _r1) is, the impedance magnitude of the residual light removal capacitor (C _r1) with respect to the frequency of the direct current power generated at the output terminal of the rectification part 110, a first residual light removal capacitor Is set to be much larger than the resistance value of the forward equivalent resistance of the first light emitting module unit 121 when the first light emitting module unit 121 connected in parallel to the first light emitting module unit C _r1 is turned on (i.e., at the time of conduction). For example, the impedance of the residual light-eliminating capacitor C _r1 is set to be 100 times or more larger than the resistance value of the forward equivalent resistance of the light-emitting module unit when any one of the light-emitting module units is turned on.

6 is a diagram showing an equivalent circuit of the first light emitting module unit 121 when N LED elements included in the first light emitting module unit 121 are in a conduction mode.

In Figure 6, υ _o is the N LED voltage applied to the device a first light-emitting module unit 121 consisting of a (that is, the output voltage of the rectification part 110), and means, r ₁ is the LED elements one in the conduction mode, It means forward internal equivalent resistance at the time of conduction. Also, υ ₁ refers to the minimum voltage drop is applied to the LED element to become the LED element in a conducting mode, and i _o denotes the current flowing through the first light emitting module unit 121 in the conduction mode. Therefore, the forward equivalent resistance at the time of conduction of the first light emitting module unit 121 when all the LED elements of the first light emitting module unit 121 become the conduction mode is expressed by Equation (1).

The forward equivalent resistance at the time of conduction is obtained only for the first light emitting module unit 121 in Equation 1, but the forward equivalent resistance at the time of conduction is obtained for all the light emitting module units 121, 122, 123, .

If the frequency of the AC power source 101 is 60 Hz, the first light emitting module unit 121 operates in response to the DC power supplied from the output terminal of the rectifying unit 110, The frequency of the ripple occurring at the frequency is 120 Hz. Therefore, the impedance Z _c of the residual light eliminating capacitor C _r1 is expressed by Equation (2).

In Equation (2), C ₁ is the capacitance of the residual light eliminating capacitor C _r1 ,? Is 2? F, and f is the frequency of the ripple voltage generated at the output terminal of the rectifying unit 110.

In Equation (2), the impedance is obtained only for the first residual light eliminating capacitor (C _r1 ). Similarly, for other residual light removing capacitors (C _r2 , C _r3 , and C _r4 ), the impedance can be obtained in the same manner.

On the other hand, when the current driving unit 130 controls the driving current flowing through the light emitting module units 121, 122, 123 and 124 to be 0, the forward direction when the light emitting module units 121, 122, 123, The value of the equivalent resistance is set so as to be much larger than the impedance of the remaining light removing capacitors C _r1 , C _r2 , C _r3 , and C _r4 connected in parallel to the corresponding light emitting module units 121, 122, 123, (C _r1 , C _r2 , C _r3 , and C _r4 ) are set. In this case, while the ripple voltage generated at the output terminal of the rectifying part 110 is decreasing, the charging charge of the parasitic capacitors C _p1 , C _p2 , C _p3 , C _p4 and C _p5 becomes the residual light removing capacitors C _r1 and C _r2 , C _r3 , C _r4 ), and can be completely turned off.

Here, when the light emitting module units 121, 122, 123 and 124 connected in parallel to the magnitudes of the impedances to the residual light removing capacitors C _r1 , C _r2 , C _r3 and C _r4 are turned off, C _r2 , C _r3 , and C _r4 are set to be equal to or less than 1/100 times the size of the forward equivalent resistance value of the remaining light-eliminating capacitors C _r1 , C _r2 , C _r3 , and C _r4 .

7 is a schematic diagram illustrating a residual light removing unit 640 composed of resistive elements (R ₁ , R ₂ , R ₃ , and R ₄ ) as charge / discharge elements in an AC direct LED lighting apparatus 100 according to an embodiment of the present invention 7 shows the parasitic capacitors C _p1 , C _p2 , C _p3 , C _p4 and C _p5 and the residual light removing resistors R ₁ , R ₂ , R ₃ , R ₄ in the charge / discharge operation.

7 and 8 together.

7, when the remaining light removing resistors R ₁ , R ₂ , R ₃ and R ₄ are connected in parallel to the light emitting module units 121, 122, 123 and 124, the residual light removing capacitors C _r1, C _r2, C _r3, C _r4), the light emitting module unit (121, 122, 123, 124), each similar to the case of connection in parallel with the parasitic capacitors (C _p1, C _p2, C _p3, the C _p4, C _p5 can be performed.

When the current driving unit 130 operates in the completely unlit light mode by controlling the driving current flowing through the light emitting module units 121, 122, 123 and 124 to be 0, the parasitic capacitor C _p1 , C _p2 , C _p3 , C _p4 , C _p5 ). At this time, the paths for charging the remaining parasitic capacitors C _p2 , C _p3 , C _p4 and C _p5 except the first parasitic capacitor C _p1 are the remaining light removing resistors R ₁ , R ₂ , R ₃ , R ₄ R ₂ , R ₃ , and R ₄ ) so that the light emitting unit 120 is completely turned off by setting the magnitude of the resistance values of the remaining light removing resistors R ₁ , R ₂ , R ₃ , and R ₄ .

Here, the light emitting module unit (121, 122, 123, 124) when operating in normal light under the control of the current driver 130, and the remaining light to remove the resistance element _{(R 1, R 2, R} 3, R 4) A value sufficiently larger than the resistance value of the forward equivalent resistance at the time of conduction of the light emitting module units 121, 122, 123, and 124 connected in parallel thereto is used as the resistance value. In this case, the current flowing from the commercial AC power supply voltage to the remaining light removing resistors R ₁ , R ₂ , R ₃ and R ₄ is negligible compared to the current flowing to the light emitting module units 121, 122, 123 and 124 The normal lighting operation of the light emitting module units 121, 122, 123, and 124 is not affected.

Thus, the remaining light to remove the resistance element _{(R 1, R 2, R} 3, R 4) to the resistance value of, the remaining light to remove the resistance element parallel-connected light-emitting respectively in _{(R 1, R 2, R} 3, R 4) The resistance values of the remaining light removing resistors R ₁ , R ₂ , R ₃ and R ₄ are set so as to be much larger than the resistance value of the forward equivalent resistance at the time of conduction of the module units 121, 122, 123 and 124. For example, when each of the resistance values of the remaining light removing resistors R ₁ , R ₂ , R ₃ and R _{4 is} connected to each of the resistors R ₁ , R ₂ , R ₃ and R _{4 in} parallel, Is set to be 100 times or more than the resistance value.

Meanwhile, the remaining light to remove the resistance element _{(R 1, R 2, R} 3, R 4) to the resistance value of a is, the light emitting module when the parallel-connected light-emitting module unit (121, 122, 123, 124) thereof is turned off So that the residual light can be removed by setting it to be much smaller than the resistance value of the forward-direction equivalent resistance of the unit. For example, when the resistance values of the residual light removing resistors R ₁ , R ₂ , R ₃ and R ₄ are parallel-connected and the light emitting module units 121, 122, 123 and 124 are turned off, Is set to be less than 1/100 times the size of the forward equivalent resistance.

9 is a view showing an AC direct lighting type LED lighting apparatus 900 according to another embodiment of the present invention.

9, an AC direct lighting type LED lighting apparatus 900 according to another embodiment of the present invention includes a first rectifying part 910, a light emitting module 920, a current driving part 930, and a second rectifying part 940 ). ≪ / RTI >

The first rectifier 910 rectifies the AC power source 901 to generate a first DC power source.

The second rectifying unit 940 rectifies the AC power source 901 to generate a second DC power source.

The first rectifying unit 910 and the second rectifying unit 940 rectify the AC power supply 901 to generate the first DC power supply and the second DC power supply, respectively. In FIG. 1, the rectifying unit 110 is connected to the AC power supply 901 are rectified to generate DC power, so that detailed description thereof will be omitted.

The light emitting module unit 920 includes one or more light emitting module units 921, 922, 923, and 924 connected in series and receives a current required for light emission from the first DC power source generated by the first rectifying unit 910.

One end of the light emitting module section 920 is connected to the (+) output terminal of the first rectifying section 910 and the other end of the light emitting module section 920 is connected to the current driving section 930. In addition, the light emitting module units 921, 922, 923, and 924 constituting the light emitting module unit 920 are connected in series to each other, and the contacts between the light emitting module units 121, 122, 123, Lt; / RTI >

Here, the operation of the light emitting module unit 920, which receives the current required for light emission from the first DC power supply and performs illumination, is performed by the operation of the light emitting module unit 120 that receives the current required for light emission from the DC power source The detailed description will be omitted.

 The current driving unit 930 receives the second DC power from the second rectifying unit 940 and controls ON / OFF of at least one of the one or more light emitting module units 921, 922, 923, and 924 .

That is, when the drive current of the light emitting module unit 920 is controlled to zero to completely turn off the light emitting module units 921, 922, 923, and 924, the first direct current power source 910, As a method of not using a resistive load at the output terminal of the first rectifying part 910 in order to prevent the voltage from leaking, unlike in FIG. 1, the DC power generated in one rectifying part is supplied to the light emitting module part 920 and the current driving part 930 ) Are not provided as power inputs in parallel. Therefore, the second DC power source generated from the second rectifying unit 940 is used as the DC power source connected to the current driving unit 930.

9, when the current driving unit 930 sets the driving current of the light emitting module unit 920 to 0, the voltage of the DC power output terminal of the first rectifying unit 910 connected to the light emitting module unit 920, Since there is no resistance load, when a DC power input ripple voltage is generated at the beginning of operation, no discharge occurs after charging, so that the voltage supplied to the light emitting module unit 920 can be in a DC state with little ripple . Accordingly, it is possible to prevent the charging / discharging current by the parasitic capacitor as shown in FIG. 2 from flowing continuously through the light emitting module unit 920.

(+) Output terminal and the (-) output terminal of the second rectifying section 940 which provides the second direct current power supplied to the current driving section 930 for more stable operation of the AC direct lighting type LED lighting apparatus 900, The input capacitors C _b may be connected in parallel. In this case, the power supply voltage for the stable current driver 930 can be provided while minimizing the influence on the overall power factor of the AC direct lighting type LED lighting apparatus 900.

As described above, in the AC direct LED lighting apparatus 100 according to an embodiment of the present invention and the AC direct LED lighting apparatus 900 according to another embodiment of the present invention, the light emitting module units 120 and 920, When it is necessary to completely turn off the lamp, it is possible that the lamp is completely turned off by the dimming or the lamp is completely turned off by the operation of the protection circuit. In this case, the power supply voltage provided to the current driver 930 is also cut off, so that the current driver 930 drives the light emitting module units 120 and 920 to be driven However, the embodiments of the present invention have the advantage of solving this problem.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them.

The description above is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

100, 900: AC direct lighting type LED lighting device
101, 901: AC power source 110: rectification part
120, 920: light emitting module unit 121, 921: first light emitting module unit
122, 922: second light emitting module unit 123, 923: third light emitting module unit
124, 924: fourth light emitting module unit 130, 930:
131: first driving current section 132: second driving current section
133: third driving current section 134: fourth driving current section
135: control unit 140, 440, 640:
910: first rectifying part 940: second rectifying part

Claims (10)

A light emitting device illumination device for removing residual light,
A rectifying unit for rectifying an AC power source to generate a DC power source;
A light emitting module unit including at least one light emitting module unit connected in series and supplied with a current required for light emission from the direct current power supply;
A current driver for receiving a DC power from the rectifying unit and controlling ON / OFF of at least one of the one or more light emitting module units; And
Wherein the at least one charging / discharging element comprises at least one charging / discharging element, wherein the at least one charging / discharging element is connected to both ends of different light emitting module units among the one or more light emitting module units,
Wherein the light emitting module includes a plurality of light emitting devices.
The method according to claim 1,
Wherein the charge / discharge elements are connected in parallel to all of the light emitting module units.
The method according to claim 1,
Wherein the charging / discharging element includes at least one of a resistive element, a capacitive element, a rectifying diode, and a switching element.
The method according to claim 1,
Wherein the charge / discharge element includes a capacitor,
Wherein an impedance magnitude of one of the capacitors according to the frequency of the DC power source is greater than a size of a forward equivalent resistance of the parallel-connected light emitting module unit when the light emitting module unit connected in parallel to any one of the capacitors is turned on A light emitting device illumination device for removing residual light from a light emitting module.
5. The method of claim 4,
Wherein the impedance of any one of the capacitors is smaller than the forward equivalent resistance of the parallel-connected light-emitting module unit when the parallel-connected light-emitting module unit is turned off. Device.
The method according to claim 1,
Wherein the charge / discharge element includes a capacitor,
The impedance magnitude of one of the capacitors according to the frequency of the direct current power source may be,
When the light emitting module unit connected in parallel to any one of the capacitors is turned on, the size of the light emitting module unit becomes at least 100 times larger than the size of the forward equivalent resistance of the parallel connected light emitting module units, Wherein the light emitting module has a forward equivalent resistance of 1/100 times or less the size of the forward equivalent resistance of the parallel-connected light emitting module unit.
The method according to claim 1,
Wherein said charge / discharge element includes a resistive element,
Wherein the size of the equivalent resistance of any one of the resistive elements is larger than the size of the forward equivalent resistance of the parallel-connected light emitting module units when the light emitting module units connected in parallel to any one of the resistive elements are turned on. And the remaining light is removed.
8. The method of claim 7,
Wherein a size of the equivalent resistance of any one of the resistive elements is smaller than a size of the forward equivalent resistance of the parallel connected light emitting module units when the parallel connected light emitting module units are turned off, Light emitting device illumination device.
A light emitting device illumination device for removing residual light,
A first rectifying unit for rectifying an AC power source to generate a first DC power source;
A second rectifying unit rectifying the AC power to generate a second DC power;
A light emitting module unit including at least one light emitting module unit connected in series and supplied with a current required for light emission from the first direct current power supply; And
And a current driving unit for controlling on / off of at least one of the one or more light emitting module units by receiving second DC power from the second rectifying unit,
Wherein the light emitting module includes a plurality of light emitting devices.
10. The light-emitting device illuminating device according to claim 9,
Further comprising a capacitor connected in parallel to both ends of the output of the second rectifying unit to remove residual light of the light emitting module.

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