WO2012050348A2

WO2012050348A2 - Power factor compensation type led lighting apparatus

Info

Publication number: WO2012050348A2
Application number: PCT/KR2011/007546
Authority: WO
Inventors: 임춘택; 김봉철; 이병훈; 김현재
Original assignee: 한국과학기술원; (주)옵토마인드
Priority date: 2010-10-13
Filing date: 2011-10-11
Publication date: 2012-04-19
Also published as: WO2012050348A3

Abstract

A power factor compensation type LED lighting apparatus according to one embodiment of the present invention provides an LED lighting apparatus comprising: a compensation circuit including a connective terminal provided at both end portions thereof to be coupled with a socket of a rapid start type stabilizer,and a serial inductance-capacitance element serially connected to an inductance element and a capacitance element to be connected between the connective terminal of one end portion and the connective terminal of the other end portion among both end portions; and an LED load circuit including a rectification circuit connected to both ends of the capacitance element to rectify the AC current of the both ends of the capacitance element to DC current, and an LED module connected to both ends of the rectification circuit to be driven by the received DC current.

Description

Power factor correction LED lighting device

Embodiment of the present invention relates to a power factor correction type LED lighting device for the LED. More particularly, the present invention relates to a power factor correction type LED lighting device that can be directly used for a rapid start ballast that is used in a conventional fluorescent lamp, but has a good power factor and can be designed to match an output power to an LED.

LED has a lot of advantages such as low power consumption, semi-permanent long life and brightness characteristics comparable to the existing fluorescent lamps. Therefore, many studies are being conducted all over the world. It is a trend that is widely used as LED lighting (el light).

In general, a fluorescent lamp is a kind of mercury discharge tube having negative resistance characteristics, and a ballast is required as a device for stably maintaining a lighting state after induction by inducing the discharge of the fluorescent lamp. The ballast applies high voltage to start the discharge necessary for the initial lighting of the fluorescent lamp and supplies stable voltage and current to the fluorescent lamp after the lighting.

On the other hand, the lighting using the LED can be directly operated by a constant voltage current, without the component of the ballast, unlike the fluorescent lamp, the power required to generate the illuminance, such as fluorescent lamp has the advantage that half of the fluorescent lamp. However, if you want to replace the existing fluorescent lighting with LED lighting, remove the ballast and fluorescent lamps and install. However, in the case of the quick lighting equation, the ballast is generally firmly attached to the building ceiling, and thus it is not easy to remove the ballast, which requires a specialist's help and thus a costly problem.

Therefore, it is possible to use the method of replacing the fluorescent lamp with the LED lamp while leaving the existing fast-lighting ballast intact, but simply replacing the existing fluorescent lamp with the LED lamp will not only reduce the input power factor but also generate excessive harmonics of the input current. In addition, there is a problem that the output power is sensitive to temperature or input voltage.

In order to solve this problem, one embodiment of the present invention, in replacing the existing mercury discharge fluorescent lamp with a light emitting device using a light emitting device such as LED power factor characteristics without removing the pre-installed quick-lighting ballast for the lighting of the fluorescent lamp The purpose is to provide a method that can produce a good illumination similar to the conventional fluorescent lamps.

In order to achieve the above object, an embodiment of the present invention, in the power factor correction type LED lighting device, each of the connection terminals provided on both ends of the LED lighting device to be coupled to the socket of the quick-lighting ballast, the both ends A compensation circuit including an inductance element and a series inductance-capacitance element in which a capacitance element is connected in series so as to be connected between a connection terminal of one end and a connection terminal of the other end; And an LED load circuit having a rectifying circuit connected to both ends of the capacitance element to rectify AC current at both ends of the capacitance element into a DC current, and an LED module connected to both ends of the rectifying circuit to receive and drive the DC current. It provides an LED lighting apparatus characterized in that.

The LED lighting apparatus may include: a first switch having two connection terminals at both ends thereof and selecting one connection terminal of the one end connected to one end of the series inductance-capacitance element; And a second switch for selecting one connection terminal of the other end connected to the other end of the series inductance-capacitance element.

The capacitance of the capacitance element may be set such that the power factor at the power input terminal of the quick-lighting ballast is one.

The capacitance of the inductance element may be set so that the quick lighting ballast and the compensation circuit resonate with the frequency of the input power supply of the quick lighting ballast.

In addition, another embodiment of the present invention, in order to achieve the above object, in the power factor correction type LED lighting device, each of the two connection terminals provided on both ends of the LED lighting device to be coupled to the socket of the quick-lighting ballast And a first inductance element and a second inductance element connected in series between any one connection terminal of the one end and the other connection terminal of the one end, between any one connection terminal of the other end and the other connection terminal of the other end. A third inductance element and a fourth inductance element connected in series, a capacitance element connected between a connection point between said first inductance element and said second inductance element and a connection point between said third inductance element and said fourth inductance element; Compensation circuit; And an LED load circuit having a rectifying circuit connected to both ends of the capacitance element to rectify AC current at both ends of the capacitance element into a DC current, and an LED module connected to both ends of the rectifying circuit to receive and drive the DC current. It provides an LED lighting apparatus characterized in that.

Capacitance of the first inductance element, the second inductance element, the third inductance element and the fourth inductance element may include the quick lighting ballast, the first inductance element, the second inductance element, the third inductance element, and the The fourth inductance element and the capacitance element may be set to resonate with the frequency of the input power supply of the quick turn-on ballast.

The first inductance element, the second inductance element, the third inductance element and the fourth inductance element may have the same inductance capacity.

In addition, another embodiment of the present invention, in order to achieve the above object, in the power factor correction type LED lighting device, each of the two connection terminals provided on both ends of the LED lighting device to be coupled to the socket of the quick-lighting ballast ; A first resistance element having one end connected to one connection terminal of one end of both ends of the LED lighting device; A second resistance element having one end connected to the other connection terminal of the one end; A third resistance element having one end connected to one connection terminal of the other end of both ends of the LED lighting device; A fourth resistance element having one end connected to the other connection terminal of the other end; A first inductance element having one end connected to a contact point of the other end of the first resistance element and the other end of the second resistance element; A second inductance element having one end connected to a contact point of the other end of the third resistance element and the other end of the fourth resistance element; A compensation circuit having a capacitance element connected in series between the other end of the first inductance element and the other end of the second inductance element; And an LED load circuit having a rectifying circuit connected to both ends of the capacitance element to rectify AC current at both ends of the capacitance element into a DC current, and an LED module connected to both ends of the rectifying circuit to receive and drive the DC current. It provides an LED lighting apparatus characterized in that.

The capacitance of the first inductance element and the second inductance element may be set such that the quick turn on ballast, the first inductance element, the second inductance element, and the capacitance element resonate with a frequency of an input power supply of the quick turn on ballast. have.

The first inductance element and the second inductance element may be set to have the same inductance capacity.

The first resistive element, the second resistive element, the third resistive element and the fourth resistive element may be set to have the same capacitance.

In order to achieve the above object, another embodiment of the present invention, a power factor correction type LED lighting device, each of the two connection terminals provided on both ends of the LED lighting device to be coupled to the socket of the quick-lighting ballast; A first resistance element having one end connected to one connection terminal of one end of both ends of the LED lighting device; A second resistance element having one end connected to the other connection terminal of the one end; A third resistance element having one end connected to one connection terminal of the other end of both ends of the LED lighting device; A fourth resistance element having one end connected to the other connection terminal of the other end; A compensation circuit in which an inductance element and a capacitance element are connected in series between a contact of the other end of the first resistance element and the other end of the second resistance element and the contact of the other end of the third resistance element and the other end of the fourth resistance element; And an LED load circuit having a rectifying circuit connected to both ends of the capacitance element to rectify AC current at both ends of the capacitance element into a DC current, and an LED module connected to both ends of the rectifying circuit to receive and drive the DC current. It provides an LED lighting apparatus characterized in that.

Here, the first resistor element, the second resistor element, the third resistor element and the fourth resistor element may be set to have the same capacitance.

As described above, according to the embodiment of the present invention, in installing the LED lighting lamp replacing the fluorescent lamp at the rear end of the pre-equipped quick-lighting ballast, the power factor of the input terminal is close to 1 while the power factor of the input stage is stably applied by applying a compensation circuit. It has the effect of making it work.

FIG. 1 is a diagram illustrating an illumination system including an LED lighting device 100 and a quick lighting ballast 130 according to a first embodiment of the present invention including a compensation circuit 110 and an LED load circuit 120.

FIG. 2 shows a block diagram of an illumination system comprising an LED lighting device 100 and a fast-lighting ballast 130 according to a first embodiment of the present invention comprising a compensation circuit 110 and an LED load circuit 120. Drawing.

3 is a diagram illustrating a circuit diagram of the compensation circuit 110, the LED load circuit 120, and the quick-lighting ballast 130.

FIG. 4 is a diagram of the circuit shown in FIG. 3 as an equivalent circuit including an ideal single auto transformer.

FIG. 5 is a diagram illustrating an equivalent circuit in which the ideal single auto transformer is removed from the equivalent circuit shown in FIG. 4 and the impedance of the secondary side T2 is moved to the primary side T1.

FIG. 6 is a diagram illustrating an illumination system including an LED lighting device 600 according to a second embodiment of the present invention including a compensation circuit 610 and an LED load circuit 120.

FIG. 7 illustrates an illumination system including an LED lighting device 700 according to a third embodiment of the present invention including a compensation circuit 710 and an LED load circuit 120.

8 is a diagram illustrating an illumination system including an LED lighting device 800 according to a fourth embodiment of the present invention including a compensation circuit 810 and an LED load circuit 820.

9 is a diagram illustrating an illumination system including an LED lighting device 900 according to a fifth embodiment of the present invention including a compensation circuit 910 and an LED load circuit 920.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

FIG. 1 is a diagram illustrating an illumination system including an LED lighting device 100 and a quick lighting ballast 130 according to a first embodiment of the present invention including a compensation circuit 110 and an LED load circuit 120. FIG. 2 shows a block diagram of an illumination system comprising an LED lighting device 100 and a fast-lighting ballast 130 according to a first embodiment of the present invention comprising a compensation circuit 110 and an LED load circuit 120. 3 is a diagram illustrating a circuit diagram of the compensation circuit 110, the LED load circuit 120, and the quick-lighting ballast 130.

As shown in Figures 1 to 3, the compensation circuit 110 according to the first embodiment of the present invention is both ends of the LED lighting device 100 to be coupled to the sockets (132a, 132b) of the quick-lighting ballast 130 Respectively provided with

connection terminals

112a and 112b, and an inductance element L1 and a capacitance between the connection terminal 112a of one end and the connection terminal 112b of the other end of both ends of the

connection terminal

112a and 112b. Device C1 has a series inductance-capacitance element 114 connected in series.

The LED load circuit 120 is connected to both ends of the capacitance element C1 to rectify the alternating current of both ends of the capacitance element into a direct current and a rectifier circuit 122 connected to both ends of the rectifier circuit to receive the DC current generated from the rectifier circuit 122. The LED module 124 is driven and received. In FIG. 3, a full bridge rectifier was used as the rectifier circuit 122 and an LED array connected in parallel to the full bridge rectifier was used as the LED module 124, but the present invention is not limited thereto.

When the quick-lighting ballast 130 of FIG. 3 is made to use a general straight fluorescent lamp as a load circuit, a and b are the quick-lighting ballast 130 in FIG. 1 to which two connection terminals 112a of one end of the fluorescent lamp are coupled. C and d represent the connection parts of the other end of the socket 132b of the quick-lighting ballast 130 to which the two connection terminals 112b of the other end of the fluorescent lamp are coupled.

The fast-lighting ballast 130 is a saturable reactor (inductance component of T ₂ ) and a ballast capacitor (Cm) at the frequency of the input power supply when the load circuit (for example, a fluorescent lamp) is directly connected. ), The large current is flowed to the fluorescent lamp to turn on the fluorescent lamp, and after the fluorescent lamp is turned on, the saturable reactor is saturated, and thus the inductance of the saturable reactor decreases and the saturation reactor and the ballast capacitor (Cm) Resonance does not occur. Therefore, since the voltage applied to the fluorescent lamp is greatly reduced, the current input to the fluorescent lamp is decreased, and the load current, which is the output of the fluorescent lamp, is kept constant while satisfying the power factor of the input terminal.

In FIG. 3, the compensation circuit 110 includes a series inductance-capacitance element between one connection a of the socket end 132a of the quick-lighting ballast 130 and one connection d of the other end of the socket 132b. 114 is connected. Here, the series inductance-capacitance element 114 includes a compensation inductor L1 used as an inductance element and a compensation capacitor C1 used as a capacitance element, and the LED load circuit 120 includes the amount of the compensation capacitor C1. The terminals are connected in parallel.

The LED load circuit 120 may include a full bridge rectifier D1, D2, D3, and D4 constituting the rectifier circuit 122, an LED array constituting the LED module 124, and an output capacitor C ₂ .

As shown in FIG. 3, when the quick-lighting ballast 130 is directly used for the LED load circuit 120 without the compensation circuit 110, the output power required for the LED module 124 becomes approximately half of the fluorescent lamp at the same level of illumination. Then, the current flowing through the quick-lighting ballast 130 is also reduced, which results in the reduction of the capacitive current in the quick-lighting ballast 130 and thus the power input terminal of the quick-lighting ballast 130. The power factor of becomes lag. Therefore, a compensation circuit 110 is required to prevent the power factor of the power input terminal of the quick-lighting ballast 130 from being reduced and set the power factor to 1, and the compensation circuit 110 is connected to the LED load circuit 120. Install the compensation capacitor C ₁ in parallel. When only the compensation capacitor C ₁ is provided in the compensation circuit 110 in order to set the power factor of the power input terminal of the quick-lighting ballast 130 to 1, the resonance frequency at the power input terminal is changed so that the resonance frequency does not change. Compensation inductor L ₁ may be added in series with capacitor C ₁ to adjust the resonant frequency to match the frequency of the input power supply of the fast-lighting ballast 130.

The LED load circuit 120 may be configured in various forms, and instead of the output capacitor C ₂ , an inductor (not shown) may be provided between the LED module 124 and the rectifier circuit 122 to reduce an output current change. In this case, the output current change may be reduced by combining values of the inductor (not shown) and the output capacitor C ₂ . Alternatively, the output capacitor C ₂ may be omitted to allow flickering noise that is twice the power frequency (120 Hz). In addition, the half-bridge rectifier may be used as the rectifier circuit 122 instead of the full bridge rectifier, and in the rectifier circuit 122, LEDs may be used in series and in parallel. As such, various LED load circuits 120 may be used, and the type of load circuits that may be used as the LED load circuits 120 is not limited to those mentioned in the present embodiment.

On the other hand, LED (Light Emitting Diode) that can be used as the material of the LED module 124 in the LED load circuit 120 in this embodiment is an organic light emitting diode (OLED), Active Matrix Organic Light Emitting (AMOLED) And various light emitting devices such as diodes.

Replacing an actual autotransformer with an ideal single transformer involves the magnetization inductance L _{m on} the primary side (T1) and L _lk equivalently representing the leakage inductance on the primary and secondary sides. n ₁ and n ₂ indicate the number of turns of the primary side T1 and the secondary side T2 coils, respectively, and the LED load circuit 120 may be equivalently modeled as R _o . Here, it is assumed that the number of turns n ₂ of the secondary side T2 coil is equivalently variable to reflect the characteristics of the saturable reactor at the secondary side T2.

FIG. 5 is a diagram illustrating an equivalent circuit in which the ideal single auto transformer is removed from the equivalent circuit shown in FIG. 4 and the impedance of the secondary side T2 is moved to the primary side T1. Where L ₂ is the sum of L _lk and L ₁ , and I _m and I ₁ represent the current flowing through the magnetizing inductance and the current flowing through the inductance L ₂ , respectively. V _o denotes the output voltage and n denotes the turn ratio (n ₁ + n ₂ ) / n ₁ of the primary side T1 and the secondary side T2 of the transformer.

In FIG. 5, inductance L ₂ and equivalent impedances Z ₁ and Z ₂ may be represented by Equation 1.

Equation 1

As described above, the size of L ₁ and C ₁ is determined so that the power factor at the input power side is 1, which is 20 W as the output of a general home EL lamp (that is, the LED load circuit 120 connected to the fluorescent lamp terminal). It can be assumed and sized. At this time, the condition that the resonance frequency (f _s ) of the power supply input terminal and the frequency of the input power supply can be expressed as Equation 2.

Equation 2

In Equation 2, V _s represents the voltage of the input power supply, V _o represents the output voltage across the equivalent impedance Z ₂ .

Thus, Equation 2 is composed of three independent equations, it can be selected by calculating the L ₁ , C ₁ , R _o value that satisfies the three equations of Equation 2 at the same time. However, in practice, the experiments are performed on the values calculated in Equation 2 in determining L ₁ , C ₁ , and R _o because of the supersaturation characteristics of the secondary side T2 and the approximate characteristics of Equation 2 in the quick lighting ballast 130. Some correction is needed. As such, when R _{o, which} is the load value of the LED load circuit 120, is determined, in order for the LED lighting device 100 to obtain a desired output (that is, an output by the desired load value R _o of the LED load circuit 120). In addition, the input power factor is 1, and the frequency of the input power and the resonant frequency match so that the harmonics of the input current are minimized so that the values of the inductor L ₁ and the capacitor C ₁ of the compensation circuit 110 can be determined. have.

On the other hand, the R _o value of the load value can be changed according to the connection form of the LED in the LED load circuit 120. In other words, if the LEDs are connected in series or in parallel in the LED load circuit 120, the equivalent R _o may change. As the number of LEDs connected in series to the LED array increases, the equivalent R _o increases and parallels. As the number of LED arrays connected to each other increases, the equivalent R _o decreases.

In the relationship between Equation 1 and Equation 2, when the frequency of the input power supply is set to 50 Hz (f ₂ ) instead of 60 Hz (f ₁ ), the values of both the inductor and the capacitor of the quick lighting ballast 130 are It is usually set to be proportional to f ₁ / f ₂ times. Therefore, when both the value of the inductor and the capacitor used in the compensation circuit 110 set the frequency of the input power to twice f ₁ / f ₂ of the value in the case of 60Hz (f _1), the impedance Z1, Z2 of the formula (1) is The size does not change. That is, the leakage inductance L _lk of the primary and secondary sides, the size of the capacitor Cm, and the capacitor C1 of the compensation circuit 110 are changed according to the change of the frequency f ₂ of the input power source. If the size of the compensation inductor L1 is also set to f ₁ / f ₂ times, the impedances Z1 and Z2 may be frequency independent.

The compensation circuit 610 of FIG. 6 uses the compensation inductor L ₁ of the compensation circuit 110 shown in FIG. 3 regardless of the polarity of the four coupling terminals of the

sockets

132a and 132b of the quick lighting ballast 130. In order to connect and operate the 610 and the LED load circuit 120, the compensation circuit 110 includes two

connection terminals

612a and 612b at both ends of the LED lighting device 600, respectively. _{One end} of each inductor L _1a (first inductance element), L _1b (second inductance element), L _1c (third inductance element), L _1d (fourth inductance element) having the same inductance value as compensation inductor L ₁ Part is connected to each

connection terminal

612a, 612b, and the other end of L _1a , L _1b is at one end of the compensation capacitor C1, and the other end of L _1c , L _1d is at the other end of the compensation capacitor C1. Can connect

In the case of Figure 6, the inductor L _1a, L _1b, L _1c, respectively, of the current flowing in L _1d because it is half (I _1/2) of the current (I ₁₎ flowing through the inductor L ₁ of Figure 3, each inductor (L _1a , L _1b, L _1c, the sum of the power consumption in the power consumption of the L _1d) is _{_{L 1 (I 1/2)}} 2/2 then four inductors _{_{(L 1a, L 1b, L}} 1c, L 1d) is L _₁ I ₁ ^2/2 becomes equal to the power consumption since the compensation inductor _{_{^{(L 1 I 1 2/2}}} ) L ₁ of the current I ₁ flowing in the case of Fig. Therefore, even if the compensation inductor 110 is connected to each of the four coupling terminals of the

sockets

132a and 132b of the fast-lighting ballast 130, the increase in power consumption does not occur, and the cost of connecting the compensation inductors to four. Only additionally, the compensation circuit 110 can be implemented without a significant increase in cost.

In FIG. 7, the voltages of the two terminals a and b of the socket one end 132a of the quick-lighting ballast 130 are referred to as Va and Vb, and the other end of the socket 132b of the quick-lighting ballast 130 is shown in FIG. 3. When the voltages of the two terminals c and d are Vc and Vd, (V _a > V _b > V _c > V _d ), and the voltage difference between a and b and the voltage difference between c and d are 220 V. Case has a predetermined voltage difference (typically about 4 Vrms). That is, | V _a -V _b | = | V _c -V _d | ≒ (4V) _rms .

In the circuit of FIG. 7, the voltage rating is 220V based on the point of (V _a > V _b > V _c > V _d ) and | V _a -V _b | = | V _c -V _d | ≒ (4V) _rms . For example, V _a -V _d where the input voltage is lower than 220V, V _b -V _c where it is higher than 220V, and V _a -V _c or V _b -V _d where the input voltage is near 220V is the input terminal of the compensation circuit 110. You can use the switch to select. In this case, the switch may include a first switch 716a for connecting one end of the series inductance capacitance element and a connection terminal 712a of one end of the connection terminals provided at both ends of the LED lighting device 100, and the other of the series inductance capacitance element. A second switch 716b for connecting the connection terminal 712b of the other end among the connection terminals of both ends of the stage and the LED lighting device 100 may be included.

1 to 7 show a 1-light lighting system, FIG. 8 shows a 2-light lighting system, and does not show the actual connection relationship between the compensation circuit 810 and the LED load circuit 820. When the compensation circuit 810 and the LED load circuit 820 is connected to the two-illumination lighting system (822, 824) is a view for explaining the principle to analyze the operating characteristics of the lighting system.

In the case of the two-lamp lighting system, as in the case of the first-class lighting system, one conventional fluorescent lamp uses the compensation circuit 110 and the LED load circuit 120, and this is a rapid lighting ballast of the conventional two-lamp fluorescent lighting system (830). The LED lighting apparatus 800 is inserted into two positions of fluorescent lamps connected to the same method. In practice, since the operating point of the fast-lighting ballast of the first-class lighting system and the second-class lighting system is different, the LED lighting device 800 having the same parameter value as that applied to the first-class lighting system is applied to the second-class lighting system as it is. It may not show the operating characteristics. However, even in this case, it is experimentally confirmed that the output power and input power factor characteristics are similar, and if better characteristics are required, the capacity of the compensating inductor and the compensating capacitor is adapted to the second lighting system using Equations 1 to 2. You can design

In addition, the same design principle applies to a three-light system and a four-light system, and the present invention is not limited to the number of fluorescent lamps that can be inserted into the lighting system.

(Example 5)

As shown in FIG. 9, the compensation circuit 910 according to the fifth embodiment of the present invention may be coupled to both ends of the LED lighting apparatus 900 so that the compensation circuit 910 may be coupled to the sockets 932a and 932b of the quick-lighting ballast 930. Each of the

connection terminals

912a and 912b provided with the first resistance element (a ', b') connected to the connection terminal 912a of one end of both ends of the

connection terminals

912a and 912b, respectively, One end of R _b1 ) and one end of second resistance element R _b2 are connected, the other end of first resistance element R _b1 and the other end of second resistance element R _b2 are connected to each other, and The contact point of the other end of the first resistance element R _b1 and the other end of the second resistance element R _b2 is connected to one end of the first inductance element L _c1 . In addition, one end of the third resistance element R _b3 and the fourth resistance element are respectively provided at two connection points c 'and d' connected to the connection terminal 912b of the other end among the both ends of the

connection terminals

912a and 912b. One end of R _b4 is connected, the other end of the third resistance element R _b3 and the other end of the fourth resistance element R _b4 are connected to each other, and the other end of the third resistance element R _b3 is The contact of the other end of the fourth resistance element R _{b4 is} connected to one end of the second inductance element L _c2 .

Both ends of the capacitance element Cc are connected between the other end of the first inductance element L _c1 and the other end of the second inductance element L _c2 , respectively.

The connection points a 'and b' are connected to the output terminals a and b of the quick-lighting ballast 930, respectively, and the connection points c 'and d' are respectively connected to the output terminals c and d of the quick-lighting ballast 930. do.

Each of the resistors R _b1 , R _b2 , R _b3 , and R _b4 may have the same value. Inductance elements L _c1 and L _c2 may also have the same value.

The LED load circuit 920 is connected to both ends of the capacitance element Cc to rectify the alternating current of both ends of the capacitance element into a direct current and a rectifier circuit 122 connected to both ends of the rectifier circuit to receive the DC current generated from the rectifier circuit 922. An LED module 924 is received and driven. In FIG. 9, a full bridge rectifier is used as the rectifier circuit 922 and an LED array connected in parallel to the full bridge rectifier is used as the LED module 924, but the rectifier circuit and the LED module in the present invention are not limited thereto.

When the quick-lighting ballast 930 of FIG. 9 is made to use a general straight fluorescent lamp as a load circuit, a and b are the quick-lighting ballast 130 in FIG. 1 in which two connection terminals 912a of one end of the fluorescent lamp are coupled. C and d represent the connection parts of the other end of the socket 132b of the quick-lighting ballast 130 to which the two connection terminals 112b of the other end of the fluorescent lamp are coupled.

The LED load circuit 920 may include a full bridge rectifier D1, D2, D3, and D4 constituting the rectifier circuit 922, an LED array constituting the LED module 924, and an output capacitor C _o .

In FIG. 9, similarly to FIG. 3, a compensation circuit 910 is used to prevent the power factor of the power input terminal of the quick-lighting ballast 930 from decreasing and to set the power factor to 1, and the compensation circuit 910 uses the LED load circuit. Install the compensation capacitor C _c in parallel with 920. When only the compensation capacitor Cc is provided in the compensation circuit 910 in order to set the power factor of the power input terminal of the fast-lighting ballast 930 to 1, the resonant frequency at the power input terminal is changed, so that the compensation capacitor is not changed. Compensation inductance elements L _c1 and L _c2 may be added in series at both ends of C _c to adjust the resonance frequency to match the frequency of the input power supply of the quick lighting ballast 130.

In the case of FIG. 9, unlike the case of using four inductance elements in FIG. 6, only two inductance elements having similar capacities are used, but have the same advantages as those of FIG. 6.

In the case of FIG. 9, when the values of the resistors R _b1 , R _b2 , R _b3 , and R _b4 and the capacitance of the inductance elements L _c1 and L _c2 are configured, the resistors R _b1 , R _b2 and R _b3 , R _b4 , respectively, is also half (I _1/2 ) of the current I ₁ flowing in the inductor L ₁ of FIG. 3, and thus, each inductance element L _c1 , L _{c2 of} FIG. power consumption is _{_{L 1 (I 1/2)}} 2/2 then the inductance element reduces the sum of the power consumption of the (L _c1, L _c2), and each resistor element (R _b1, R _b2, R _b3, R _b4) Power consumption is increased by some, but by using only two inductance elements, the size and cost of the compensation circuit 910 can be minimized compared to the case of using four. Therefore, even if the compensation inductor is connected to the four coupling terminals of the

sockets

132a and 132b of the fast-lighting ballast 930, the increase in power consumption does not occur much, and the compensation inductor is connected to two. Since only the additional cost is generated, a small compensation circuit 910 can be implemented while reducing the cost.

Meanwhile, in FIG. 9, one of the first inductance element L _c1 and the second inductance element L _c2 may be omitted. In this case, one of the first inductance element L _c1 and the second inductance element L _c2 is omitted, so that the contact of the other end of the first resistance element R _b1 and the other end of the second resistance element R _b2 The compensating capacitance element C _c and the non-omitted inductance element L _c1 or L _c2 are connected in series between the other end of the third resistance element R _b3 and the contact of the other end of the fourth resistance element R _b4 . do.

In the above description, all elements constituting the embodiments of the present invention are described as being combined or operating in combination, but the present invention is not necessarily limited to the embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more.

In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be included, unless otherwise stated, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

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

As described above, the present invention provides stable light output while the power factor of the input terminal is close to 1 by applying a compensation circuit when installing a light emitting device such as an LED to replace a fluorescent lamp at the rear end of a pre-equipped quick-lighting ballast. The invention is useful because it is effective.

CROSS-REFERENCE TO RELATED APPLICATION

This patent application is filed with a patent application No. 10-2010-0099802 filed in Korea on October 13, 2010, and patent application Nos. 10-2011-0096623 and filed in Korea on September 24, 2011 If you claim priority under U.S. Patent Act No. 119 (a) (35 USC § 119 (a)) to Patent Application No. 10-2011-0101093, filed in Korea on May 5, all of these are incorporated by reference. Incorporated into this patent application. In addition, if this patent application claims priority for the same reason as above for a country other than the United States, all the contents thereof are incorporated into this patent application by reference.

Claims

In the power factor correction type LED lighting device,

Compensation circuits each having connection terminals at both ends of the LED lighting apparatus so as to be coupled to the sockets of the quick-lighting ballast, and inductance elements and capacitance elements connected in series between the connection terminals of one end and the other ends of the both ends. ; And

An LED load circuit having a rectifying circuit connected to both ends of the capacitance element to rectify the AC current at both ends of the capacitance element into a DC current, and an LED module connected to both ends of the rectifying circuit to receive and drive the DC current.

LED lighting apparatus comprising a.
The method of claim 1,

The LED lighting device,

Two connection terminals are provided at each of the two ends,

A first switch for selecting one connection terminal of one end of the series inductance-capacitance element connected to one end of the series inductance-capacitance element; And

A second switch for selecting one connection terminal of the other end connected to the other end of the series inductance-capacitance element

LED lighting apparatus characterized in that it further comprises.
The method of claim 1,

The capacitance of the capacitance element,

LED lighting apparatus, characterized in that the power factor at the power input terminal of the quick-lighting ballast is set to be 1.
The method of claim 1,

And the capacitance of the inductance element is set such that the quick lighting ballast and the compensation circuit resonate with a frequency of an input power supply of the quick lighting ballast.
In the power factor correction type LED lighting device,

Two connection terminals each provided at both ends of the LED lighting apparatus so as to be coupled to a socket of a quick-lighting ballast; A first inductance element and a second inductance element connected in series between one connection terminal of one end of the both ends of the LED lighting device and the other connection terminal of the one end; A third inductance element and a fourth inductance element connected in series between one connection terminal of the other end of the LED lighting device and the other connection terminal of the other end; A compensation circuit having a capacitance element connected between a connection point between said first inductance element and said second inductance element and a connection point between said third inductance element and said fourth inductance element; And

An LED load circuit having a rectifying circuit connected to both ends of the capacitance element to rectify the AC current at both ends of the capacitance element into a DC current, and an LED module connected to both ends of the rectifying circuit to receive and drive the DC current.

LED lighting apparatus comprising a.
The method of claim 5,

The capacitance of the capacitance element,

LED lighting apparatus, characterized in that the power factor at the power input terminal of the quick-lighting ballast is set to be 1.
The method of claim 5,

Capacitance of the first inductance element, the second inductance element, the third inductance element and the fourth inductance element may include the quick lighting ballast, the first inductance element, the second inductance element, the third inductance element, and the And the fourth inductance element and the capacitance element are set to resonate with the frequency of the input power supply of the quick-lighting ballast.
The method of claim 5,

And the first inductance element, the second inductance element, the third inductance element and the fourth inductance element have the same inductance capacity.
In the power factor correction type LED lighting device,

Two connection terminals each provided at both ends of the LED lighting apparatus so as to be coupled to a socket of a quick-lighting ballast; A first resistance element having one end connected to one connection terminal of one end of both ends of the LED lighting device; A second resistance element having one end connected to the other connection terminal of the one end; A third resistance element having one end connected to one connection terminal of the other end of both ends of the LED lighting device; A fourth resistance element having one end connected to the other connection terminal of the other end; A first inductance element having one end connected to a contact point of the other end of the first resistance element and the other end of the second resistance element; A second inductance element having one end connected to a contact point of the other end of the third resistance element and the other end of the fourth resistance element; A compensation circuit having a capacitance element connected in series between the other end of the first inductance element and the other end of the second inductance element; And

An LED load circuit having a rectifying circuit connected to both ends of the capacitance element to rectify the AC current at both ends of the capacitance element into a DC current, and an LED module connected to both ends of the rectifying circuit to receive and drive the DC current.

LED lighting apparatus comprising a.
The method of claim 9,

The capacitance of the first inductance element and the second inductance element is set such that the quick-lighting ballast, the first inductance element, the second inductance element and the capacitance element are resonant with the frequency of the input power supply of the quick-lighting ballast. LED lighting device characterized in that.
The method of claim 9,

And the first inductance element and the second inductance element have the same inductance capacity.
The method of claim 9,

The first inductance element and the second inductance element has the same inductance capacity,

And the first resistive element, the second resistive element, the third resistive element and the fourth resistive element have the same capacitance.
In the power factor correction type LED lighting device,

Two connection terminals each provided at both ends of the LED lighting apparatus so as to be coupled to a socket of a quick-lighting ballast; A first resistance element having one end connected to one connection terminal of one end of both ends of the LED lighting device; A second resistance element having one end connected to the other connection terminal of the one end; A third resistance element having one end connected to one connection terminal of the other end of both ends of the LED lighting device; A fourth resistance element having one end connected to the other connection terminal of the other end; A compensation circuit in which an inductance element and a capacitance element are connected in series between a contact of the other end of the first resistance element and the other end of the second resistance element and the contact of the other end of the third resistance element and the other end of the fourth resistance element; And

An LED load circuit having a rectifying circuit connected to both ends of the capacitance element to rectify the AC current at both ends of the capacitance element into a DC current, and an LED module connected to both ends of the rectifying circuit to receive and drive the DC current.

LED lighting apparatus comprising a.
The method according to claim 9 or 13,

And the first resistive element, the second resistive element, the third resistive element and the fourth resistive element have the same capacitance.