KR200426136Y1 - Electrodeless fluorescent lamp using magnetic induction - Google Patents

Abstract

An electrodeless fluorescent lamp using magnetic induction is disclosed. The electrodeless fluorescent lamp is formed by bending a 'U' shape at the lower end of the main body and the main body where the power socket is formed, and having both the first bulb and the second bulb, the first bulb and the second bulb filled with the encapsulating gas therein. It is provided with a connection bulb for connecting the inside of the main body is equipped with a high frequency generator for generating a high frequency. In addition, a ferrite core coupled to the high frequency generator is applied to the circumferential surface of the connection bulb to apply high frequency to the bulbs. The high frequency may react with the encapsulating gas to induce ultraviolet rays, and the induced ultraviolet rays may react with the fluorescent material applied to the inner surface of the bulb to emit gas rays. These electrodeless fluorescent lamps can be driven at relatively low operating frequencies, thereby reducing electromagnetic interference. In addition, the long life can be reduced environmental pollution of heavy metal gas.

Electrodeless, Bulb, High Frequency, Oscillation, EMI, Rectification, PFC

Description

ELECTRODEELESS FLUORESCENT LAMP USING MAGNETIC INDUCTION}

1 is a perspective view showing an electrodeless fluorescent lamp of the present invention.

Figure 2 is a front view showing the electrodeless fluorescent lamp of the present invention.

Figure 3 is a side view showing an electrodeless fluorescent lamp of the present invention.

4 is a block diagram of an electrodeless fluorescent lamp having a high frequency generator according to an embodiment of the present invention.

5 is a view for explaining the driving principle of the electrodeless fluorescent lamp.

FIG. 6 is a diagram for describing the oscillation control circuit of FIG. 4.

FIG. 7 is a diagram for describing the decision circuit of FIG. 6.

<Explanation of symbols for the main parts of the drawings>

10: electrodeless fluorescent lamp 100: main body

200: High frequency generator 210: EMI filter

220: rectifier 230: PFC circuit

240: DC / AC inverter 250: oscillation control circuit

310: first bulb 320: second bulb

330 ： Connection bulb 400 ： Ferrite core

The present invention relates to an electrodeless fluorescent lamp, and more particularly to an electrodeless fluorescent lamp that emits gas rays through magnetic induction.

An electrodeless fluorescent lamp is a lamp that emits visible light using the principle of magnetic induction and self discharge in lamp design. In the electrodeless fluorescent lamp, when a high frequency (250 KHz) is applied to a ferrite core primary coil, a magnetic field is generated around the coil. The magnetic field passes through a bulb corresponding to the secondary circuit, and generates electromotive force in the secondary circuit. Electrons are accelerated in the bulb by the generated electromotive force, and the ultraviolet rays emitted from the plasma emit visible light while passing through the phosphor coated inside the glass tube.

These electrodeless fluorescent lamps significantly reduce power consumption and dramatically increase their lifetime. Accordingly, since the heavy metal gas that is discarded can be reduced, the electrodeless fluorescent lamp is in the spotlight as an environmentally friendly light source. The principle of the electrodeless fluorescent lamp is 1907 PC. It has been proposed by Hewitt, and various types of electrodeless fluorescent lamps have been commercialized in recent years. In 1991, Matsushita introduced 'Everlight', an electrodeless fluorescent lamp. Everlight operates at 13.56MHz and has an efficiency of 37.0 lm / W. In 1991, Philips introduced a 'QL' lamp that operates at 2.65MHz and has an efficiency of 65.0 lm / W. In 1994, GE introduced Genura, which operates at 2.65MHz and has an efficiency of 48.0 lm / W. In the same year, Osram announced Endura, which operates at 0.25MHz and has an efficiency of 75.0 lm / W.

However, these conventional electrodeless fluorescent lamps operate at a relatively high frequency, which may cause electromagnetic interference, deteriorate the stability of the driving circuit, and there is still room for improvement in power efficiency.

In addition, it can be said that the design of the bulb which is creative yet unique in response to the needs of various consumers is required. Therefore, research on electrodeless fluorescent lamps with excellent design, long life, high efficiency, and high color rendering are urgently needed.

Accordingly, an object of the present invention is to provide an electrodeless fluorescent lamp that emits stable visible light while increasing light efficiency by using a high frequency AC power source.

Another object of the present invention is to provide an electrodeless fluorescent lamp that is original, unique, long life, high efficiency and high color rendering.

Another object of the present invention is to provide an electrodeless fluorescent lamp that is easy to manufacture and easy to use due to its simple structure.

According to a preferred embodiment of the present invention for achieving the above object of the present invention, the electrodeless fluorescent lamp is formed with a main body provided with a power socket, bent in a 'U' shape at the lower end of the main body, It may include a first bulb and a second bulb filled with the inclusion gas, the connecting bulb connecting the first bulb and the second bulb. The bulb gas is filled in the bulbs. In addition, a high frequency generator capable of generating a high frequency is mounted inside the main body, and the connection bulb is electrically connected to the high frequency generator so that a ferrite core for applying a high frequency to the bulbs is coupled. The high frequency may react with the encapsulation gas to induce ultraviolet rays.

Three wavelengths of fluorescent materials are coated on the inner surfaces of the first, second, and connection bulbs, and the ultraviolet rays pass through the fluorescent materials to emit visible light.

The high frequency generator converts a DC signal generated from an incoming AC signal to generate an output AC signal oscillating at a frequency higher than the frequency of the incoming AC signal and at least in series with a terminal of the output AC signal. A first lamp signal is generated through one capacitor and at least one inductor, and a second lamp signal is generated from the first lamp signal using a passive element, and the first lamp signal and the second lamp signal are absent. An oscillation control circuit for supplying the two terminals of the coil of the electrode fluorescent lamp.

The high frequency generator may include an EMI filter for filtering electromagnetic waves of the incoming AC signal, and a rectifier for generating the DC signal from the electromagnetic wave filtered signal, and when generating the DC signal from the electromagnetic wave filtered signal. The PFC circuit may further include a PFC circuit configured to control a phase of the signal filtered by the electromagnetic wave to correct a power factor of the AC signal.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited to the embodiments. Like reference numerals in the drawings denote like elements.

1 is a perspective view showing an electrodeless fluorescent lamp of the present invention, Figure 2 is a front view showing the electrodeless fluorescent lamp of the present invention, Figure 3 is a side view showing the electrodeless fluorescent lamp of the present invention.

As shown therein, the electrodeless fluorescent lamp is composed of a main body, a high frequency generator, a bulb and a ferrite core.

The main body 100 is formed in a square shape, and the central portions of two opposite sides facing each other are bent inwardly. A power socket 110 connected to an external power device is formed at the center of the main body 100. A screw is formed on the circumferential surface of the power socket 110 to be firmly coupled to the external power device. Inside the main body 100 is a high frequency generator (not shown) for generating a high frequency.

A bulb 300 is formed at the lower side of the main body 100. The bulb 300 includes a first bulb 310 and a second bulb 320 formed in a 'U' shape, and a connection bulb 330 connecting the first bulb 310 and the second bulb 320. It is composed of

The first bulb 310 includes a first side 312 and a second side 314 having a circular cross section, and the first side 312 and the second side 314 are the main body 100. Is joined to the corner part of the. In addition, the second bulb 320 includes a third side 322 and a fourth side 324 having a circular cross section, and are coupled to the remaining corners of the main body 100.

The connection bulb 330 is composed of a pair, a first connection bulb 330 connecting the first side 312 and the third side 322, the second side 314 and the fourth And a second connection bulb 330 connecting the sides 324.

The ferrite core 400 is formed in a donut shape and mounted on the first connection bulb 330 and the second connection bulb 330, respectively. That is, the ferrite core 400 has a hole formed at the center thereof, and the first connection bulb 330 and the second connection bulb 330 pass through the hole. The high frequency ferrite core 400 is electrically connected to the high frequency generator to apply a high frequency to the first bulb 310, the second bulb 320, the first connecting bulb 330, and the second connecting bulb 330. can do.

Three wavelength fluorescent materials are coated on inner surfaces of the first bulb 310, the second bulb 320, the first connection bulb 330, and the second connection bulb 330. Ultraviolet rays generated in the second bulb 320, the first connection bulb 330, and the second connection bulb 330 pass through the three-wavelength fluorescent substance to emit visible light. As the fluorescent material used in the present invention, a rare earth light emitting material mainly composed of three light emitting color components of red, green, and blue may be used. Rare earth fluorescent materials include rare earth elements (15 to 57-71), Soanclium (So), and Yttrium (Y) to add 17 elements. Rare earth elements are 4f-electron in their atomic structure. Due to the peculiarity of the shell, it has a narrow and sensitive absorption or light emission in the visible wavelength range. There are 17 rare earth elements, which have similar chemical properties and are mixed together, so the procedure is very complex. When used as a fluorescent material, it is used separately, so it is important to separate rare earth elements when making a three-wavelength lamp.

The bulb of the electrodeless fluorescent lamp used to replace the conventional filament has the specifications shown in Table 1.

As shown in the above table, the bulb for the electrodeless fluorescent lamp used in the present invention has a lower power consumption than the conventional incandescent bulb. In addition, in terms of efficiency, it can be seen that the bulb for the electrodeless fluorescent lamp is superior to six times as high as 90 (lm / W), whereas the incandescent bulb is 15 (lm / W).

4 is a block diagram of an electrodeless fluorescent lamp having a high frequency generator according to an embodiment of the present invention, Figure 5 is a view for explaining the driving principle of the electrodeless fluorescent lamp, Figure 6 is the oscillation control of FIG. It is a figure for demonstrating a circuit, and FIG. 7 is a figure for demonstrating the decision circuit of FIG.

As shown in the drawing, the high frequency generator 200 of the electrodeless fluorescent lamp 10 includes an electromagnetic interference (EMI) filter 210, a rectifier 220, a power factor correlation circuit 230, and a DC / A DC-to-AC inverter 240, and an oscillation control circuit 250.

The bulb 300 is a light source capable of emitting light to the electrodeless without a filament (light filament) or a light emitting plate having a normal fluorescent lamp inside the discharge tube. The first bulb 310 and the second bulb 320 may be made of a 'U' shape. However, the present invention is not limited thereto, and the first bulb 310 and the second bulb 320 may be manufactured in other shapes such as a quadrangle, a coil type, a parallelogram, and the like according to a user's request.

The first bulb 310 and the second bulb 320 receive high frequency AC power from the high frequency generator 200 through a coil wound around the ferrite core 400. As shown in FIG. 5, the terminals of the coil wound around the ferrite core 400 are connected to the high frequency generator 200 to receive a high frequency AC power.

When a high frequency AC power is applied from the high frequency generator 200, the first bulb 310 and the second bulb 320 are operated according to an operation of a coil wound around the ferrite core 400 of the electrodeless fluorescent lamp 10. And an induction electric field is generated inside the connection bulb 330. The induction electric field generated in this way excites the encapsulated gas inside the first bulb 310, the second bulb 320, and the connection bulb 330, for example, an inert gas such as mercury. As the electrons excite the other particles again, ultraviolet light is generated by the high energy gas particles. At this time, the visible light is finally emitted by the reaction of the three-wavelength fluorescent material applied to the inside of the first bulb 310, the second bulb 320, and the connection bulb 330 with ultraviolet rays. Since the electrodeless fluorescent lamp 10 has a long lifespan unlike a general electrode lamp such as a metal lamp or a sodium lamp, the electrodeless fluorescent lamp 10 reduces pollution of heavy metal gas and provides an environmentally friendly light source.

Hereinafter, the high frequency generator 200 generating the high frequency AC power to drive the first bulb 310, the second bulb 320, and the connection bulb 330 will be described in detail. In particular, the high frequency generator 200 is manufactured at low cost and stable to the first bulb 310, the second bulb 320, and the connecting bulb 330 having a long lifespan with a high light efficiency, for example, 80lm / W or more. Was designed to drive. The high frequency AC power generated by the high frequency generator 200 has a lower operating frequency than that of the related art, for example, 0.1 to 0.4 MHz, thereby reducing electromagnetic interference.

In FIG. 4, the EMI filter 210 included in the high frequency generator 200 filters electromagnetic waves of an incoming alternating current (AC) signal, for example, a 220-volt AC power signal in a home. The voltage level of the power supply to the home may not be ideally supplied due to instability of the supplier's equipment or the external environment, eg thunder, lightning or other factors, to minimize the effects of electromagnetic interference that may occur. The EMI filter 210 is required for this purpose. The EMI filter 210 limits the incoming AC signal not to become larger or smaller than a predetermined size.

The rectifier 220 generates a direct current (DC) signal from the signal from which the electromagnetic wave is filtered. A bridge type diode circuit may be used as the rectifier 220.

In addition, when the rectifier 220 generates the DC signal from the signal from which the electromagnetic wave is filtered, the PFC circuit 230 may be used to correct a power factor of the incoming AC signal. The PFC circuit 230 reduces reactive power by controlling the phase of the signal filtered by the electromagnetic wave using a power capacitor. The PFC circuit 230 may supply stable current to subsequent circuits, minimize power loss, and reduce interference of electromagnetic waves.

As such, the DC signal stably generated according to the operation of the rectifier 220 and the PFC circuit 230 is converted into an AC signal by the DC / AC inverter 240, and the DC / AC inverter 240 Generates an output AC signal oscillating at a frequency higher than the frequency of the AC signal introduced into the EMI filter 210. For example, the frequency of the AC signal introduced into the EMI filter 210 is typically about 60 Hz, and the frequency of the output AC signal from the DC / AC inverter 240 may be 0.25 MHz.

The output AC signal generated from the DC / AC inverter 240 is controlled by the oscillation control circuit 250 and then supplied to two terminals A1 and A2 of the coil of the electrodeless fluorescent lamp 10. That is, the oscillation control circuit 250 generates a first ramp signal through at least one capacitor and at least one inductor connected in series with the terminal of the output AC signal, and generates a passive device. ) Generates a second ramp signal from the first ramp signal. The oscillation control circuit 250 supplies the first lamp signal and the second lamp signal to two terminals A1 and A2 of the coil of the electrodeless fluorescent lamp 10.

Referring to FIG. 6, the oscillation control circuit 250 may include a first capacitor C1, a second capacitor C2, a first inductor L1, a third capacitor C3, a transformer L2, The first resistor R1 and the second resistor R2 are included. In addition, the oscillation control circuit 250 may include a protection circuit 251, a determination circuit 252, a first MOSFET Q1, a second MOSFET Q2, a first auxiliary circuit 256, and a second auxiliary circuit ( 257).

The first capacitor C1 is connected between the terminal of the output AC signal generated by the DC / AC inverter 240 and the first node ND1. The second capacitor C2 is connected between the first node ND1 and the second node ND2. The first inductor L1 is connected between the second node ND2 and one terminal A1 of the coil of the electrodeless fluorescent lamp 10. That is, the output AC signal is a first lamp signal through the first capacitor C1, the second capacitor C2, and the first inductor L1, and the first lamp signal is the electrodeless fluorescent lamp. It is supplied to one terminal A1 of the coil of (10).

The third capacitor C3 is connected between the terminal A1 of the first ramp signal and the third node ND3. The first resistor R1 is connected between the third node ND3 and the ground GND. The first coil of the transformer L2 is connected between the third node ND3 and the other terminal A2 of the coil of the electrodeless fluorescent lamp 10. That is, the first ramp signal is a second ramp signal by the first coil of the third capacitor C3, the first resistor R1, and the transformer L2, and the second ramp signal is the second ramp signal. The other terminal A2 of the coil of the electrodeless fluorescent lamp 10 is supplied. The first coil of the transformer L2 connected between the third node ND3 and the terminal A2 of the second ramp signal acts as an inductor.

The decision circuit 252 uses the first ramp signal at A1 and a signal received from the second coil of the transformer L2 interacting with the first coil of the transformer L2 between A2 and ND3. According to the dimmer control signal DIM, a first dimmer signal DMO1 and a second dimmer signal DMO2 for determining oscillation frequencies of the first ramp signal and the second ramp signal are generated.

The dimmer control signal DIM is generated by the second resistor R2 connected between the predetermined element in the determination circuit 252 and the ground GND. The second resistor R2 may be a variable resistor, and the brightness of the first bulb 310, the second bulb 320, and the connection bulb 330 may be adjusted as the value of the second resistor R2 is changed. Make it possible. That is, the brightness can be adjusted by dividing the road or the room by varying the second resistor R2, thereby contributing to the reduction of power consumption.

For this dimmer operation, the drain of the first MOSFET Q1 is connected to the power supply VCC, and the source of the second MOSFET Q2 is connected to the ground GND. The first MOSFET Q1 and the second MOSFET Q2 are preferably N-channel MOSFETs (Metal-Oxide-Semiconductor Field Effect Transistors).

The first auxiliary circuit 256 adjusts the voltage of the first dimmer signal DMO1 between the gate and the source of the first MOSFET Q1, and adjusts the voltage of the first dimmer signal DMO1. Supply to the gate of the first MOSFET (Q1). The first auxiliary circuit 256 may include a transformer, a resistor, a diode, etc. to adjust the voltage of the first dimmer signal DMO1.

The second auxiliary circuit 340 adjusts the voltage of the second dimmer signal DMO2 between the gate and the source of the second MOSFET Q2, and adjusts the voltage of the second dimmer signal DMO2. Supply to the gate of the second MOSFET (Q2). The second auxiliary circuit 257 may include a resistor, a diode, and the like to adjust the voltage of the second dimmer signal DMO2.

As described above, when the first dimmer signal DMO1 and the second dimmer signal DMO2 are adjusted to drive the first MOSFET Q1 and the second MOSFET Q2, The voltage or frequency is changed, and thus the frequencies of the first lamp signal and the second lamp signal supplied to the two terminals A1 and A2 of the coil of the electrodeless fluorescent lamp 10 may vary. To this end, the first dimmer signal DMO1 and the second dimmer signal DMO2 may have an AC shape having a predetermined frequency.

For example, a frequency of a signal supplied to the first bulb 310, the second bulb 320, and the connection bulb 330 by the first dimmer signal DMO1 and the second dimmer signal DMO2 is increased. As it increases, the value of the inductance component of the coil wound around the ferrite core of the electrodeless fluorescent lamp 10 is increased, so that the brightness of the first bulb 310, the second bulb 320 and the connecting bulb 330 decreases. And power consumption is reduced. On the contrary, when the frequency of the signal supplied to the first bulb 310, the second bulb 320, and the connection bulb 330 decreases due to the first dimmer signal DMO1 and the second dimmer signal DMO2. In addition, the value of the inductance component of the coil wound around the ferrite core of the electrodeless fluorescent lamp 10 is decreased, so that the brightness of the first bulb 310, the second bulb 320, and the connection bulb 330 increases. Power consumption is also increased.

 In addition, the determination circuit 252 may generate a protection signal PROT indicating a short circuit or an opening of the first ramp signal or the second ramp signal. Accordingly, the protection circuit 251 selectively outputs the high frequency output AC signal generated by the DC / AC inverter 240 to the first capacitor C1 according to the protection signal PROT. The first lamp signal or the second lamp signal may be opened or shorted by the cause at the first bulb 310, the second bulb 320, and the connection bulb 330. When the first lamp signal or the second lamp signal is open, the DC / AC inverter 240 because the first bulb 310, the second bulb 320, and the connection bulb 330 do not operate normally. It is not necessary to output the output AC signal of the high frequency generated by the first capacitor (C1). In addition, when the first lamp signal or the second lamp signal is short-circuited, overcurrent may damage the coil of the electrodeless fluorescent lamp 10 or the circuit of each part of the oscillation control circuit 250. It is not necessary to output the high frequency output AC signal generated by the DC / AC inverter 240 to the first capacitor C1.

Referring to FIG. 7, the decision circuit 252 includes a comparator 253, a frequency determiner 254, and a protection signal generator 255.

The comparison unit 253 is a signal introduced into the first bulb 310, the second bulb 320 and the connection bulb 330, that is, the first ramp signal at A1 and between the A2 and ND3 A signal received from the second coil of the transformer L2 which interacts with the first coil of the transformer L2 is collected, and a corresponding DC voltage is detected. Accordingly, the comparison unit 253 compares the detected predetermined DC voltage with the DC voltage corresponding to the dimmer control signal DIM generated through the second resistor R2 in FIG. 3.

According to the comparison result of the comparison unit 253, the frequency determiner 254 may fix the frequency of the first ramp signal and the second ramp signal to the first dimmer signal DMO1 and the second dimmer. The frequency of the signal DMO2 is increased or decreased by a predetermined amount. For example, in order to fix the frequencies of the first ramp signal and the second ramp signal at a frequency higher (or lower) than the current frequency, the first dimmer signal DMO1 and the second dimmer signal DMO2. Do not raise (or lower) the frequency of at once. When the frequencies of the first dimmer signal DMO1 and the second dimmer signal DMO2 are increased (or decreased) by a predetermined magnitude, the comparison unit 253 according to the feedback of the first ramp signal and the second ramp signal. The comparison result is different, and accordingly, the frequency determiner 254 determines whether to further increase (or decrease) the frequencies of the first dimmer signal DMO1 and the second dimmer signal DMO2. Generate dimmer signals.

In addition, the protection signal generator 255 may generate a protection signal PROT indicating a short circuit or an opening of the first lamp signal or the second lamp signal. The protection signal generator 255 is a signal introduced into the first bulb 310, the second bulb 320, and the connection bulb 330, that is, between the first ramp signal at A1 and between A2 and ND3. The protection signal PROT is generated from a signal received from the second coil of the transformer L2 interacting with the first coil of the transformer L2. Accordingly, the protection circuit 251 selectively outputs the high frequency output AC signal generated by the DC / AC inverter 240 to the first capacitor C1 of FIG. 3 according to the protection signal PROT. .

Apparatus and method according to the present invention can be implemented in the form of program instructions that can be executed by various computer means may be recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention, or may be known and available to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, according to the present invention, there is an effect of emitting stable visible light while increasing the light efficiency by using a high frequency AC power source.

In addition, there is an effect that can produce a high color as well as unique, individual, long life and high efficiency.

In addition, the simple structure provides an electrodeless fluorescent lamp that is easy to manufacture and easily used.

In addition, since it can be driven at a relatively low operating frequency, electromagnetic interference is reduced, and the brightness can be adjusted by dividing the road or the room, thereby reducing the power consumption.

It also operates to ensure a long life, reducing pollution of heavy metal gases and being environmentally friendly.

As described above, the present invention has been described with reference to a preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

Claims (6)

A main body in which a power socket is formed; A first bulb and a second bulb formed at a lower end of the main body in a 'U' shape and filled with a gas filled therein; A connection bulb connecting both sides of the first bulb and the second bulb; A high frequency generator mounted inside the main body to generate a high frequency; And A ferrite core connected to the high frequency generator and coupled to the connection bulb to apply the high frequency to the first, second and connection bulbs; The electrodeless fluorescent lamp comprising a high frequency induces ultraviolet light by reacting with the encapsulation gas. The method of claim 1, An electrodeless fluorescent lamp, characterized in that the three-wavelength fluorescent material is coated on the inner surface of the first and second bulb and the connecting bulb. The method of claim 2, The first and second bulbs and the connecting bulb is an electrodeless fluorescent lamp characterized in that the ultraviolet light passes through the three-wavelength fluorescent material to emit visible light. The method of claim 1, The high frequency generator A DC / AC inverter for generating an output AC signal that oscillates a DC signal generated from an incoming AC signal at a frequency higher than a frequency of the incoming AC signal; And Generating a first ramp signal through at least one capacitor and at least one inductor serially connected to a terminal of the output AC signal, and generating a second ramp signal from the first ramp signal using a passive element; An oscillation control circuit for supplying a lamp signal and the second lamp signal to two terminals of a coil of an electrodeless lamp; Electrodeless fluorescent lamp comprising a. The method of claim 4, wherein The high frequency generator An EMI filter for filtering electromagnetic waves of the incoming AC signal; And A rectifier for generating the DC signal from the signal filtered by the electromagnetic wave; Induction fluorescent lamp further comprises a. The method of claim 5, The high frequency generator And generating a DC signal from the electromagnetic wave filtered signal, further comprising a PFC circuit controlling a phase of the electromagnetic wave filtered signal to correct a power factor of the incoming AC signal. lamp.

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