KR100806857B1 - Induction Fluorescent Lamp - Google Patents

Abstract

The present invention relates to an electrodeless fluorescent lamp, and more particularly, to an electrodeless fluorescent lamp that blocks electromagnetic leakage.

In order to achieve the above object, the present invention provides a light emitting device comprising: a bulb formed by mutually bonding an outer tube having a discharge space therein and an inner tube formed inside the outer sphere to form the discharge space; A base coupled from the bottom of the bulb; An antenna inserted from the base and received in the inner tube and forming a magnetic field in the discharge space; The metal protective plate is accommodated inside the base and shields electromagnetic waves radiated from the antenna toward the inner wall of the base.

The electrodeless fluorescent lamp according to the present invention has an advantageous effect of blocking electromagnetic waves.

Description

Electrodeless fluorescent lamp

1 is a cross-sectional view showing the structure of a typical electrodeless fluorescent lamp.

2 is a cross-sectional view of an electrodeless fluorescent lamp according to an embodiment of the present invention.

3 is a cross-sectional view illustrating an example of a position where an electromagnetic shielding plate is provided according to the present embodiment.

4 is a view for explaining a grounding part according to the present embodiment.

The present invention relates to an electrodeless fluorescent lamp, and more particularly, to an electrodeless fluorescent lamp that blocks electromagnetic leakage.

Hereinafter, the characteristics of the electrodeless fluorescent lamp will be described.

An electrodeless fluorescent lamp seals a bulb without a filament and an electrode inside a bulb, installs an external electrode outside the bulb, forms a magnetic field in the bulb by the external electrode, and emits light by gas discharge. More specifically, the electrodeless fluorescent lamp emits light in the bulb when a high frequency magnetic field is generated in the antenna. First, the mercury atom filled in the discharge space emits ultraviolet rays, and the temperature inside the bulb increases due to the light emission. When the temperature is above a certain temperature, the amalgam contained in the exhaust pipe emits mercury atoms to emit light.

In general, an electrodeless fluorescent lamp discharges a mixture of argon, krypton, and mercury, which are typical inert gases in a bulb, by a high frequency power source applied from the outside, and the ultraviolet rays emitted from the mercury are visible through the phosphor coated on the inner surface of the bulb. It is emitted by light rays. Since the electrodeless fluorescent lamp does not use an electrode, the electrodeless fluorescent lamp has a lifespan of 8 to 10 times compared to a fluorescent lamp which is commonly used, and has an excellent lighting effect.

1 is a cross-sectional view showing the structure of a typical electrodeless fluorescent lamp. Hereinafter, the structure of an electrodeless fluorescent lamp will be described with reference to FIG. 1.

In the electrodeless fluorescent lamp as shown in FIG. 1, the inner tube 21 is bonded to the outer opening 11 of the bulb 10 in which the discharge space 12 is formed, and protects the inner tube 21. In order to lower the bulb 10, the base 20 is coupled. The discharge space 12 is formed between the outer wall of the inner tube 21 and the inner wall of the bulb 10. The exhaust pipe 22 is connected to the discharge space 12 below the inner tube 21. The exhaust pipe 22 is for exhausting air and impurities in the bulb 10 and is formed by sealing by tip off after the discharge gas is sealed. Referring to FIG. 1, two exhaust pipes 22a and 22b are provided, and two exhaust pipes 22 are provided on the side of the inner tube 21. The amalgam 23 is formed in one exhaust pipe 22a. To accommodate the exhaust process and the discharge gas to the other exhaust pipe (22b) while receiving.

Below. The problem of the electrodeless fluorescent lamp described above will be described.

In the case of an inductively coupled electrodeless fluorescent lamp, an alternating magnetic field is formed in the discharge space 12 in the bulb 10 by an alternating current supplied by a high frequency electronic component. In this case, since the high frequency electronic component uses a signal having a high frequency (various frequency bands are possible, for example, 2.65Mhz frequency), problems due to electromagnetic waves may occur. Problems with electromagnetic waves can occur when electromagnetic waves are absorbed by animals or by other electronic devices. When the high frequency component of the electrodeless fluorescent lamp is absorbed by the human body, it may adversely affect the human body, and when absorbed by other electronic products, a problem of electromagnetic interference (EMI) may occur.

The present invention has been proposed to solve the problems of the prior art, and an object of the present invention is to propose an electrodeless fluorescent lamp that blocks electromagnetic leakage.

It is still another object of the present invention to propose an electrodeless fluorescent lamp which blocks electromagnetic waves leaking out of a lamp emitting purpose.

Another object of the present invention is to propose an electrodeless fluorescent lamp which prevents internal corrosion which may occur due to ultraviolet radiation at the bottom of the bulb from which the coating material is removed.

In order to achieve the above object, the present invention is a bulb formed by mutually bonding an outer tube having a discharge space therein and an inner tube formed inside the outer sphere to form the discharge space; A base coupled from the bottom of the bulb; An antenna inserted from the base and received in the inner tube and forming a magnetic field in the discharge space; The metal protective plate is accommodated inside the base and shields electromagnetic waves radiated from the antenna toward the inner wall of the base.

Preferably, the metal protective plate is characterized in that the copper paste is coated.

Preferably, the fluorescent lamp further comprises a grounding portion connected to the metal protection plate to emit a current induced in the metal protection plate to the outside of the fluorescent lamp.

Specific features and effects of the invention will be further embodied by one embodiment of the invention described below. Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

2 is a cross-sectional view of an electrodeless fluorescent lamp according to an embodiment of the present invention. Hereinafter, the electrodeless fluorescent lamp according to the present embodiment will be described with reference to FIG. 2.

The electrodeless fluorescent lamp according to the present embodiment includes a bulb 10, a base 20 coupled to the lower side of the bulb 10, and an antenna 31 inserted from the base 20. Preferably, the bulb 10 is formed by mutually bonding an outer tube 11 having a discharge space therein and an inner tube 21 accommodating the antenna 31. Preferably, the bottom 24 of the bulb includes at least one exhaust pipe 22.

Hereinafter, specific features and a manufacturing method of the fluorescent lamp of FIG. 2 will be described.

The bulb 10 includes a substantially spherical outer sphere 11 having a discharge space 12 therein, and an inner tube 21 inserted into the outer sphere 11.

The fluorescent material 13 is coated on the inner wall of the outer opening 11, and a discharge space 12 is formed in a space between the inner wall of the outer opening 11 and the inner tube 21. The discharge space 12 is filled with a discharge gas composed of an ionizable metal vapor atom and an inert gas.

The inner tube 21 accommodates the antenna 31. The inner tube 21 preferably has a side wall extending from the lower end thereof to be joined to the lower end of the outer opening 11 to seal the discharge space 12.

At least one exhaust pipe 22 preferably protrudes downward from the lower end 24 of the bulb. In addition, the upper end of the exhaust pipe 22 is connected to the discharge space 12, the lower end is preferably closed. Specifically, the exhaust pipe 22 is for injecting the discharge gas into the discharge space 12, the lower end of the exhaust pipe 22 is preferably sealed after the discharge gas is injected closed. Although the number of the exhaust pipes 22 is not limited, it is preferable that the amalgam 23 is accommodated in one exhaust pipe 22a and two exhaust pipes are formed in the other exhaust pipe 22b so as to perform exhaust.

The base 20 is preferably made of a non-conductive material of plastics, it is preferable that the base 20 is coupled from the bottom of the bulb 10 to be easy to carry. The base 20 is coupled from the lower side of the bulb, may cover the device such as the exhaust pipe (22). That is, the base 20 may protect the inside of the fluorescent lamp. The inner side of the base 20, the bulb fixing protrusion 27 and the antenna fixing end 32 is seated on the bulb engaging projection 27, the lower end of the bulb 24 is seated at the time of coupling between the bulb 10 and the base 20 More preferably, the coupling protrusion 26 is formed.

The antenna 31 is preferably inserted from the base 20 into the inner tube 21. More specifically, the upper portion of the antenna 31 is located in the inner tube 21, the antenna fixing end 32 is more preferably seated in the antenna fixing end coupling protrusion 26. The antenna 31 includes a coil 31a and a core 31b and forms a magnetic field around the metal vapor atoms and the inert gas in the bulb 10. In this case, the metal vapor atoms and the inert gas are accelerated by the formed alternating magnetic field, and outgoing occurs, and ultraviolet rays are emitted by the free electrons emitted by the collided particles. The emitted ultraviolet light is incident on the fluorescent material 13 to generate visible light.

Hereinafter, the electromagnetic shielding plate proposed in this embodiment will be described.

Electromagnetic waves radiated from the antenna 31 are radiated in various directions, and in the case of the electromagnetic waves radiated to the outer wall of the bulb 10, the electromagnetic wave is leaked by adding a coating material that shields the electromagnetic waves and passes visible light at the time of phosphor coating. Can be blocked.

In this case, in order to bond the outer opening 11 and the inner tube 21, the coating material applied to the lower end of the outer opening 21 should be removed. That is, due to the bonding of the outer opening 11 and the inner tube 21, the coating material may not be present at the lower end 24 of the bulb. In this case, leakage of electromagnetic waves may occur in the direction of the lower end 24 of the bulb. That is, electromagnetic waves may leak in addition to the purpose of light emission.

Hereinafter, an electromagnetic shielding plate additionally provided to block electromagnetic waves leaking in addition to the purpose of light emission. This embodiment proposes to include an electromagnetic shielding plate 25 in the base.

3 is a cross-sectional view illustrating an example of a position where an electromagnetic shielding plate is provided according to the present embodiment.

As shown in FIG. 3, the electromagnetic shielding plate 25 accommodated inside the base 20 is further provided. Since the electromagnetic shielding plate 25 is positioned between the inner side 28 of the base 20 and the antenna 31, the electromagnetic shielding plate 25 may shield electromagnetic waves emitted from the antenna 31. That is, electromagnetic waves radiated downward from the antenna 31 are shielded by the electromagnetic shielding plate 25.

More preferably, the electromagnetic shielding plate 25 has a substantially cylindrical shape. Since the base 20 has a cylindrical shape, when the electromagnetic shielding plate 25 is manufactured in a cylindrical shape, the base 20 is easily inserted into the base 20 and accommodated therein. When the electromagnetic shielding plate 25 is a cylinder, its outer diameter is designed to be smaller than that of the base 20.

When the electromagnetic shielding plate 25 is a cylinder, the electromagnetic shielding plate 25 may be designed to cover the entire inside of the base 20 by freely designing the height of the cylinder, or may be designed to cover only a part of the base. .

As shown in FIG. 3, the electromagnetic shielding plate is preferably fixed to any part 29 of the inner side of the base. The fixed position is freely defined.

The electromagnetic shielding plate 25 is preferably a metal protective plate made of metal. As the main component of the metal protective plate, any metal having excellent electrical conductivity and workability, such as copper, chromium, nickel, silver, molybdenum, tungsten, and aluminum, can be used. On the other hand, copper is most preferable in terms of price, electrical conductivity, and processing.

The electromagnetic shielding plate 25 may be variously formed in addition to the metal protective plate. For example, the metal protective plate may be formed in a constant pattern. That is, after the non-metal plate is first formed on the inner side 28 of the base, a metal protective plate having a specific pattern may be formed on a portion of the inner side 28 of the base according to a predetermined pattern to block the leakage of electromagnetic waves. In addition, an additional absorption layer may be further provided on the metal protective plate. That is, a separate absorbing layer may be further generated after fabricating or before fabricating the metal protective plate. The absorption layer may be formed in a form in which a metal powder having ferrite properties is dispersed in a polymer resin such as a polyurethane resin, an acrylic resin, or silicon. Ferrite has a dielectric dipole inside, and this dielectric polarization is resisted in a certain form according to the electromagnetic wave. In this case, the dielectric heat is generated by changing the electromagnetic wave incident on the absorbing layer by the resistance heat generated by the dielectric polarization. Can absorb substantially. Alternatively, the absorption layer may be a layer containing a fluid to absorb electromagnetic waves.

Hereinafter, a ground part connected to the electromagnetic shielding plate 25 will be described.

The ground part is connected to the electromagnetic shielding plate and is a device for discharging the current induced in the electromagnetic shielding plate to the outside to the fluorescent lamp, it is preferably provided in addition to the fluorescent lamp proposed in this embodiment. Preferably, the ground portion is a conductive wire, and emits a current to the outside through the conductive wire to block electromagnetic waves. That is, as shown in FIG. 4, it is preferable to provide a grounding portion to the electromagnetic shielding plate and the external conductive wire 40 to discharge current induced in the electromagnetic shielding plate to the outside.

It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

The present invention has the following effects.

The present invention proposes an electrodeless fluorescent lamp that blocks electromagnetic leakage. In the case of an electrodeless fluorescent lamp, when the power consumption increases to 100 watts or more, the problem of electromagnetic leakage becomes more serious. The present invention proposes an electromagnetic shielding plate of various structures to block the electromagnetic wave leaking in addition to the purpose of lamp light emission.

Claims (3)

A bulb formed by mutually joining an outer sphere having a discharge space therein and an inner tube formed inside the outer sphere to form the discharge space; A base coupled from the bottom of the bulb; An antenna inserted from the base and received in the inner tube and forming a magnetic field in the discharge space; A metal protective plate accommodated inside the base and shielding electromagnetic waves radiated from the antenna toward the inner wall of the base; Induction fluorescent lamps. The method of claim 1, The metal protective plate is a cylindrical copper plate having a diameter smaller than the diameter of the inner wall of the base Characterized Induction fluorescent lamps. The method according to claim 1 or 2, And a ground part connected to the metal protection plate to emit a current to the outside of the fluorescent lamp. Induction fluorescent lamps.

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