KR20060014207A - Fluorescent lamp with coil antenna and surface light source device using the same - Google Patents

Abstract

The present invention relates to a fluorescent lamp having a coil antenna electrode and a surface light source device using the same. In the fluorescent lamp having the coil antenna electrode, high-density plasma discharge is performed by the first electric field generated between the electrodes and the second electric field induced by the magnetic field of each electrode, thereby obtaining high luminance visible light. Therefore, high brightness visible light can be obtained even if a small number of fluorescent lamps are used when mounted in a large area surface light source device. In addition, the manufacturing method of a fluorescent lamp is easy, and manufacturing cost can be made low.

Description

Fluorescent lamp with coil antenna and surface light source device using same {FLUORESCENT LAMP WITH COIL ANTENNA AND SURFACE LIGHT SOURCE DEVICE USING THE SAME}             

1 is a perspective view of a fluorescent lamp having a coil antenna electrode according to an embodiment of the present invention;

2 is a cross-sectional view A-A of the fluorescent lamp of FIG. 1;

3 is a B-B cross-sectional view of the fluorescent lamp of FIG. 1;

4 is a partial cross-sectional view showing an example of a superimposed winding coil antenna electrode;

5 is a perspective view showing an example in which a coil antenna electrode is installed in an antenna cap;

FIG. 6 is a partial cross-sectional view taken along line A-A of the fluorescent lamp with the antenna cap of FIG. 5;

7 is a perspective view showing an example in which the width of the open end coil of the coil antenna electrode is thickly modified;

8 is a cross-sectional view A-A of the fluorescent lamp of FIG. 7;

9 is a perspective view showing an example in which the coil antenna electrode is formed of a band coil;

10 is a perspective view showing an example in which electrode plates are additionally installed on both sides of a fluorescent lamp;

FIG. 11 is an A-A cross sectional view of the fluorescent lamp of FIG. 10; FIG.

12 to 18 are partial cross-sectional views showing various forms of the internal electrodes as an example in which the internal electrodes are additionally installed in the discharge tube;

19 is a side view showing an example in which a flat coil antenna is installed at both end sides of a fluorescent lamp;

20 is a plan sectional view showing an example in which a coil antenna electrode is installed in a fluorescent lamp of a circle type;

21 and 22 are partial cross-sectional views showing an example in which only the coil antenna electrode is installed inside the fluorescent lamp;

23 is a perspective view showing an example in which a magnetic core is additionally installed at both ends of a discharge tube;

24 is a sectional view taken along line A-A of the fluorescent lamp of FIG. 19;

25 is a perspective view of a surface light source device using a fluorescent lamp having a coil antenna electrode of the present invention;

FIG. 26 is a sectional view taken along line A-A of the surface light source device of FIG. 25; FIG.

27 is a perspective view showing a continuous antenna cap structure;

28 is a circuit diagram showing an example in which coil antenna electrodes are connected in parallel;

29 and 30 show examples of current balancing circuits; And

31 is a circuit diagram illustrating an example in which coil antenna electrodes are connected in series.

The present invention relates to a fluorescent lamp and a surface light source device using the same, and more particularly, to a fluorescent lamp having a coil antenna electrode and a surface light source device using the same.

The surface light source is widely used as a backlight unit of a liquid crystal display panel, a general lighting device, an advertisement display panel, and the like. Liquid crystal display devices employed in televisions, computer monitors, and the like require a back light unit (BLU) for irradiating light from the rear end as a non-light emitting element. In general, the backlight unit is largely a cold cathode fluorescent lamp (CCFL) method, and a flat-format fluorescent lamp (FFL) type surface light source device in which the substrate on which the phosphor layer is distributed is assembled. Is being used. In addition, as fluorescent lamps used for backlights, external electrode fluorescent lamps (EEFLs) in which both electrodes are installed outside the tube, electrodeless fluorescent lamps which do not form electrodes, and the like are also used.

The cold cathode fluorescent lamp is divided into an edge light method and a direct light method in which a plurality of light sources are superimposed on a plane according to the arrangement of the light sources. The method using such a cold cathode fluorescent lamp is unsuitable for a large liquid crystal display panel in view of its characteristics, and a flat fluorescent lamp system is mainly employed.

The general structure of the flat fluorescent lamp is composed of a rear substrate and a front substrate bonded to the rear substrate at a predetermined interval through a frame to form a flat discharge space. The discharge space is filled with discharge gases such as xenon, neon, and mercury (Hg). Phosphors are applied to the inner surface of the discharge space, and a plurality of electrodes are alternately arranged in parallel on the rear substrate, and a dielectric barrier is provided thereon. As power is applied to the discharge electrode, the phosphor layer is excited by ultraviolet rays generated as a dielectric barrier discharge between the electrodes to generate visible light.

Large area display devices require large area surface light sources suitable for them. However, the conventional surface light source devices as described above are expensive to manufacture a large area, there is a problem that it is not easy to obtain a uniform high brightness visible light in a wide plane. Therefore, there is a need for a surface light source device that has a structure that is easy to manufacture for large area, obtains uniform and high luminance visible light in a wide plane, and can lower manufacturing cost.

An object of the present invention has been proposed to solve the above-mentioned problems, and has a structure that is easy to manufacture for large area, obtains uniform high luminance visible light on a wide plane, and can lower manufacturing cost. The present invention provides a lamp and a surface light source device using the same.

According to one aspect of the present invention for achieving the object of the present invention as described above, the fluorescent lamp comprises: a tubular discharge tube is coated with a phosphor layer on the inner surface and filled with discharge gas; A power supply for supplying AC power; A first coil antenna electrode wound at one end of the discharge tube and connected at one end to an output end of the power supply source and open at the other end; And a second coil antenna electrode wound at the other end of the discharge tube and connected to the ground and open at the other end thereof, the first electric field and the first and second antenna electrodes generated between the first and second coil antenna electrodes. The induced electromotive force by the second electric field induced from the magnetic field generated by the magnetic field is transferred to the discharge space inside the discharge tube to accelerate the plasma discharge and the ions.

In this embodiment, the first and second coil antenna electrodes are wound in two or more stages.

In this embodiment, the overlaid first and second antenna electrodes include an insulating material between each end.

In this embodiment, each of the first and second coil antenna electrodes is mounted and includes a pair of antenna caps respectively mounted at both ends of the discharge tube.

In this embodiment, one end of the first coil antenna electrode connected to the output end of the power supply source is disposed at the end of the discharge tube and the other end opened is directed toward the center of the discharge tube; One end of the second coil antenna electrode connected to the ground is positioned at the end of the discharge tube and the other end opened is disposed toward the center of the discharge tube.

In this embodiment, the widths of the open end coils of the first and second coil antenna electrodes are relatively wide.

In this embodiment, the first and second coil antenna electrodes toward the center at both ends of the discharge tube is increased in width of the winding.

In this embodiment, the installation on one outer side of the discharge tube includes a first plate electrode and a second plate electrode provided on the other end outer side of the discharge tube, one end of the first coil antenna electrode is connected to the first plate electrode The other end is connected to the output end of the power supply source, one end of the second coil antenna electrode is connected to the second flat electrode and the other end is connected to ground.

In this embodiment, a first internal electrode provided inside one end of the discharge tube and a second internal electrode provided inside the other end, wherein one end of the first coil antenna electrode is connected to the first internal electrode and the other end is an output end of the power supply source. One end of the second coil antenna electrode is connected to the second internal electrode and the other end is connected to ground.

In this embodiment, the first and second internal electrodes have a pole shape having a predetermined length.

In this embodiment, the first and second internal electrodes have a flat plate shape.

In this embodiment, the first and second internal electrodes of the plate type are formed with protrusions of the conductors on opposite surfaces thereof.

In this embodiment, the first and second internal electrodes of the plate type are formed with carbon nanotubes on opposite surfaces thereof.

In this embodiment, the first and second internal electrodes have a coil shape.

In this embodiment, the width of the winding increases as the first and second internal electrodes having the coil shape are directed toward the center from both ends of the discharge tube.

In this embodiment, the first and second internal electrodes have a ring shape.

In this embodiment, the first and second internal electrodes have a conical shape.

In this embodiment, the first and second coil antenna electrodes have a flat coil shape that is provided on both outer sides of the discharge tube.

In this embodiment, the first and second coil antenna electrodes having the flat coil shape have a shape in which the width increases from the center to the outside, one end of the center is connected to the power supply output terminal or the ground, and the other end of the center coil is opened. .

In this embodiment, the discharge tube has a straight cylindrical structure having a predetermined length.

In this embodiment, the discharge tube has a curved shape.]

In this embodiment, the discharge tube has an annular shape so that both ends face each other.

In this embodiment, it includes an antenna cap mounted on opposite ends of the discharge tube and provided with first and second coil antenna electrodes.

According to another feature of the present invention, a fluorescent lamp includes: a tubular discharge tube coated with a phosphor layer on the inner side and filled with discharge gas; A power supply for supplying AC power; A first coil antenna electrode provided at one end of the discharge tube, the first coil antenna electrode is protruded outward of the discharge tube and connected to a power supply output end, and the other end is wound in a coil shape inside the discharge tube; The second coil antenna electrode and the second coil antenna electrode, which are installed inside the other end of the discharge tube, have one end protruding outward of the discharge tube and are connected to the ground, and the other end is wound in a coil shape inside the discharge tube, and the first and second coil antenna electrodes The induced electromotive force by the second electric field induced from the first electric field generated between the magnetic field generated by the first and second antenna electrodes is transferred to the discharge space inside the discharge tube to accelerate the plasma discharge and the ions.

In this embodiment, the width of the winding increases as the first and second coil antenna electrodes are directed from the both ends of the discharge tube to the center portion.

In this embodiment, the first magnetic core is inserted into one end of the discharge tube and the first winding wound around it, the second magnetic core inserted into the other end of the discharge tube and the second winding wound thereon, the first The winding is connected between the first coil antenna electrode and the output end of the power supply, and the second winding is connected between the second coil antenna ground.

According to another feature of the invention, the surface light source device comprises: a power supply source for supplying AC power; A plurality of tubular discharge tubes in which a phosphor layer is applied to an inner side and filled with discharge gas; Each discharge tube is once wound on the outside and the first coil antenna electrode, one end of which is connected to the output terminal of the power supply source and the other end is opened, and the second coil antenna electrode, which is wound on the other end of the discharge tube and connected to the ground and the other end of which is open And an induced electromotive force by a second electric field induced from a first electric field generated between the first and second coil antenna electrodes and a magnetic field generated by the first and second antenna electrodes to the discharge space inside the discharge tube. Thereby accelerating plasma discharge and ions; A base substrate on which a plurality of discharge tubes are arranged in parallel; A fixing member fixing a plurality of discharge tubes to the base substrate; A frame installed along an edge of the base substrate; It is provided in front of a plurality of discharge tubes and includes a diffusion plate for diffusing visible light emitted from the discharge tubes.

In this embodiment, a reflector is provided between the base substrate and the plurality of discharge tubes.

In this embodiment, the plurality of first coil antenna electrodes respectively provided in the plurality of discharge tubes are connected in parallel to the output terminal of the power supply source, and the plurality of second antenna coils are connected in parallel to the ground.

In this embodiment, a current balancing circuit is connected between the power supply and the plurality of first coil antenna electrodes to balance current values through the plurality of first antenna coils.

In this embodiment, the current balancing circuit includes a plurality of transformers, the primary windings of the plurality of transformers are connected in series between the output terminal of the power supply and ground, and the secondary windings of the plurality of transformers are the plurality of first coils. It is connected to the antenna electrode, respectively.

In this embodiment, the current balancing circuit comprises a magnetic core and a plurality of windings wound in a common number of turns on the magnetic core, one end of the plurality of windings being commonly connected to the output end of the power supply and the other end of the plurality of windings. Respectively connected to the first coil antenna electrode.

In this embodiment, each of the first and second coil antenna electrodes is mounted and includes a pair of antenna caps respectively mounted at both ends of the discharge tube. The plurality of antenna caps on which the first coil antenna electrodes are mounted are integrally formed at predetermined intervals, and the plurality of antenna caps on which the second coil antenna electrodes are mounted are integrally formed at predetermined intervals.

In this embodiment, one end of the first coil antenna electrode connected to the output end of the power supply source is disposed at the end of the discharge tube and the other end opened is directed toward the center of the discharge tube; One end of the second coil antenna electrode connected to the ground is positioned at the end of the discharge tube and the other end opened is disposed toward the center of the discharge tube.

In this embodiment, the widths of the open end coils of the first and second coil antenna electrodes are relatively wide.

In this embodiment, the first and second coil antenna electrodes toward the center at both ends of the discharge tube is increased in width of the winding.

In this embodiment, each of the plurality of discharge tubes includes a first plate electrode once installed on the outer side and a second plate electrode provided on the other end outer side of the discharge tube, one end of the first coil antenna electrode being the first plate electrode. The other end is connected to the output terminal of the power supply source, one end of the second coil antenna electrode is connected to the second plate electrode, and the other end is connected to the ground.

In this embodiment, each of the plurality of discharge tubes includes a first internal electrode once installed inwardly and a second internal electrode provided inside the other end, wherein one end of the first coil antenna electrode is connected to the first internal electrode and the other end is a power source. It is connected to the output end of the source, one end of the second coil antenna electrode is connected with the second internal electrode and the other end is connected to ground.

In this embodiment, the first and second coil antenna electrodes have a flat coil shape that is provided on both outer sides of the discharge tube.

In this embodiment, the discharge tube has a cylindrical structure having a predetermined length.

In this embodiment, the discharge tube has a curved shape.

The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited by the embodiments described below. This embodiment is provided to explain more clearly the present invention to those skilled in the art. Accordingly, the shape of the elements in the drawings and the like are exaggerated to emphasize a clearer description.

(Example)

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

1 is a perspective view of a fluorescent lamp having a coil antenna electrode according to an embodiment of the present invention. 2 is a cross-sectional view A-A of the fluorescent lamp of FIG. 1 and FIG. 3 is a cross-sectional view B-B of the fluorescent lamp of FIG.

Referring to the drawings, the fluorescent lamp 10 of the present invention includes a discharge tube 12 and first and second coil antenna electrodes 14 and 16 wound at both ends thereof. The discharge tube 12 is composed of a cylindrical glass material and the phosphor layer 13 is applied to the inner side. The internal discharge space 11 of the discharge tube 12 is filled with discharge gas such as xenon (Xe), neon (Ne), or mercury (Hg).

The first coil antenna electrode 14 is wound outside one end of the discharge tube 10, and one end 14-1 is connected to the output end of the power supply source 20 that supplies AC power, and the other end 14-2 is opened. . The second coil antenna electrode 16 is wound outside the other end of the discharge tube 10, and one end 16-1 is connected to the ground 22, and the other end 16-2 is opened. Here, one end 14-1 of the first coil antenna electrode 14 connected to the output end of the power supply source 20 is located at the end of the discharge tube 12 and the other end 14-2 opened is the center of the discharge tube 20. It is arranged to face. One end 16-1 of the second coil antenna electrode 16 connected to the ground 22 is disposed at the end of the discharge tube 12, and the other end 16-2 opened is disposed toward the center of the discharge tube.

The fluorescent lamp 10 having such a structure is generated by the first electric field E1 and the first and second antenna electrodes 14 and 16 generated between the first and second coil antenna electrodes 14 and 16. The induced electromotive force by the second electric field E2 induced from the magnetic field B is transferred to the discharge space 11 inside the discharge tube 12 to accelerate the plasma discharge and the ions.

The first and second coil antenna electrodes 14 and 16 are wound around both ends of the discharge tube 12 using a common copper wire. Alternatively, a conductive material can be used to print on both outer sides of the discharge tube 12. As illustrated in FIG. 4, the first and second coil antenna electrodes 14 and 16 wound around both ends of the discharge tube 12 may be overlapped and wound in two or more stages. The overlapping winding first and second antenna electrodes 14 and 16 are provided with an insulating material 15 between each end. As shown in FIGS. 5 and 6, the first and second coil antenna electrodes 14 and 16 may be mounted at both ends of the discharge tube 12 in a form provided inside the pair of cylindrical antenna caps 24. Can be.

As illustrated in FIGS. 7 and 8, the first and second coil antenna electrodes 14 and 16 may form relatively wide widths of the open end coils 14-3 and 16-3. Alternatively, as shown in FIG. 9, the first and second coil antenna electrodes 14 and 16 may be formed of a band coil, and the widths of the windings W1 to W8 may extend from both ends to the center of the discharge tube 12. It is possible to have a shape that increases (W1 <W2 <... <W8). As such, the shapes of the first and second coil antenna electrodes 14 and 16 may be modified in various forms.

FIG. 10 is a perspective view illustrating an example in which electrode plates are additionally provided at both sides of the fluorescent lamp, and FIG. 11 is a cross-sectional view taken along line A-A of the fluorescent lamp of FIG. Referring to the drawings, the first and second flat electrodes 17 and 18 may be added to the outer surfaces of both ends of the discharge tube 12, respectively. Here, one end 14-1 of the first coil antenna electrode 14 is connected to the first flat plate electrode 17, and the other end 14-2 is connected to the output end of the power supply source 20. One end 16-1 of the second coil antenna electrode 16 is connected to the second flat electrode 18, and the other end 16-2 is connected to the ground 22.

12 to 18 are partial cross-sectional views showing various forms of the internal electrodes as an example in which the internal electrodes 30 are additionally installed in the discharge tube 12. For example, as illustrated in FIG. 12, the internal electrode 30 may have a pole shape having a predetermined length. As another example, as shown in FIG. 13, it may have a flat plate shape. As another example, the planar internal electrode 30 may have a plurality of conductor protrusions 34 formed on opposite surfaces thereof. The conductor protrusion 34 may be formed of carbon nanotubes.

As another example, as illustrated in FIGS. 15 and 16, the internal electrode 30 may have a coil shape, and the widths W1 to W4 of the windings increase from the both ends of the discharge tube 12 toward the center portion (W1). <W2 <.. <W4). As another example, as shown in FIG. 17, the internal electrode 30 may have a ring shape. As another example, as shown in Figure 18, it may have a conical shape. As described above, the internal electrode 30 may be manufactured in various forms, and the protrusions 32 protruding to the outside of the discharge tube 12 may include the ends 14-1 and 16 of the first and second coil antenna electrodes 14 and 16. Is connected to -1). Here, the other ends 14-2 and 16-2 of the first and second coil antenna electrodes 14 and 16 are connected to the output terminal of the power supply 20 and the ground 22, respectively.

As a modified example of the fluorescent lamp 10, FIG. 19 is a side view showing an example in which a flat coil antenna is installed at both ends of the fluorescent lamp. As shown in the figure, the first and second coil antenna electrodes 14 and 16 may be installed in the shape of a flat coil on both outer sides of the discharge tube 12. Here, the widths W1, W2, W3, ..., W8 of the first and second coil antenna electrodes 14, 16 having a flat coil shape are increased (W1 <W2 <W3 <.. . <W8), one end of the center portion 14-2, 16-2 is connected to the power supply source 20 output terminal or ground 22, and the other end 14-1, 16-1 is opened. .

The fluorescent lamp 10 may be manufactured to have an annular shape so that both ends of the discharge tube 10 face each other, as shown in FIG. 20. The annular discharge tube 12 is equipped with an antenna cap 26 at both ends thereof, the antenna cap 26 is open to both sides, and the first and second coil antenna electrodes 14 and 16 are provided.

21 and 22 are partial cross-sectional views showing an example in which only the coil antenna electrode is installed inside the fluorescent lamp. Referring to the drawings, the fluorescent lamp 10 may include only internal electrodes 30 on both inner sides of the discharge tube 12. One end 32 of the internal electrode 30 protrudes to the outside of the discharge tube 12, and the other end is wound in a coil shape inside the discharge tube. The internal electrode 30 is provided opposite to both ends of the discharge tube and is connected to the power supply source 20 and the ground 22. Here, the coil-shaped inner electrode 30 is directed toward the center from both ends of the discharge tube 12, the width (W1, W2, ... ,, W4) of the winding increases (W1 <W2 <.. <W4) It can have a shape.

 Even when the internal electrode 30 is provided, the fluorescent lamp 10 is induced from the first electric field E1 generated between the internal electrode 30 having a coil shape and the magnetic field B generated by the internal electrode 30. The induced electromotive force by the second electric field E2 is transmitted to the discharge space 11 inside the discharge tube 12 to accelerate the plasma discharge and the ions.

On both ends of the discharge tube 12 having only the internal electrodes 30, as shown in FIGS. 23 and 24, magnetic cores 32 and 34 may be additionally provided. Each of the magnetic cores 32 and 34 is provided with windings 33 and 35 connected to the internal electrodes, and each winding is connected to the power supply 20 and the ground 22, respectively.

In the fluorescent lamp having the coil antenna electrode of the present invention as described above, the plasma is generated and ion accelerated by the first electric field generated between the electrodes by the coil antenna electrode and the second electric field induced from the magnetic field by the coil antenna electrode. As the generation density increases, more visible light is generated, thereby obtaining high luminance.

Next, a surface light source device using a fluorescent lamp having the coil antenna electrode as described above will be described with reference to FIGS. 25 to 27.

25 is a perspective view of a surface light source device using a fluorescent lamp having a coil antenna electrode of the present invention, and FIG. 26 is a cross-sectional view taken along line A-A of the surface light source device of FIG.

Referring to the drawings, the surface light source device 50 of the present invention is a direct light source using a plurality of fluorescent lamps 10 having a coil antenna electrode. The fluorescent lamp 10 used for the surface light source device 50 can be configured using any one of the fluorescent lamps 10 described in the above-described embodiment.

The surface light source device 50 includes a base substrate 52 on which discharge tubes 12 of a plurality of fluorescent lamps 10 are arranged in parallel. Fixing members 54 for fixing a plurality of discharge tubes 12 are provided at both upper sides of the base substrate 52. The frame 52 is installed along the edge of the base substrate 52, and the diffusion plate 57 is installed on the front of the plurality of discharge tubes. The diffuser plate 57 evenly spreads the visible light emitted from the plurality of discharge tubes 12. The reflector 58 is provided between the base substrate 52 and the discharge tubes 12 of the plurality of fluorescent lamps 10.

The first and second coil antenna electrodes 14 and 16 wound around both ends of the discharge tube 12 may be installed at the antenna cap 60 to be mounted at both ends of the discharge tube 12. As shown in FIG. 27, the antenna cap 60 mounted on the plurality of discharge tubes 12 may be integrally formed at a predetermined interval.

The plurality of fluorescent lamps 10 are connected in parallel between the power supply 20 and ground 22, as shown in FIG. That is, the plurality of first coil antenna electrodes 14 respectively installed in the plurality of fluorescent lamps 10 are connected in parallel to the output terminal of the power source 20, and the plurality of second antenna coils 16 are grounded 22. ) In parallel. At this time, a current balance circuit 27 may be added to balance the current value input to each fluorescent lamp 10.

The current value input to the plurality of fluorescent lamps 10 may be different from each other by the difference in impedance, and in this case, the luminance may be partially different. In order to prevent such a case, a current balance circuit may be provided between the power supply 20 and the fluorescent lamp 10. 29 and 30 show an example of a current balancing circuit.

Referring to FIG. 29, the current balancing circuit 27 is connected between the power supply 20 and the plurality of integrated lamps 10 to balance the respective current values through the plurality of fluorescent lamps 10. The current balancing circuit 27 includes a plurality of transformers, the primary windings of the plurality of transformers are connected in series between the output terminal of the power supply 20 and the ground, and the secondary windings of the plurality of transformers are connected to the fluorescent lamp 10. It is connected to power input terminals T1, T2, T3, ..., Tn, respectively.

Referring to FIG. 30, the current balancing circuit 27 of another structure includes a magnetic core and a plurality of windings wound around the magnetic core in a common turn, and one end of the plurality of windings is connected to an output terminal of the power supply 20. The other end is connected in common and the other end is connected to the power input terminals T1, T2, T3, ..., Tn of the fluorescent lamp 10, respectively.

As another example of the electrical connection method of the plurality of fluorescent lamps 10, as shown in FIG. 31, the plurality of first coil antenna electrodes 14 are connected in series to the power source 20, and the plurality of second coils. The antenna electrodes 16 may be connected in series with the ground 22.

As described above, a plurality of fluorescent lamps having coil antenna electrodes can be arranged in parallel to form a surface light source device of a direct method. When the surface light is configured as described above, the fluorescent lamp of the present invention can obtain high luminance visible light, and thus can obtain the same or higher luminance even when using a smaller number than in the prior art.

In this way, the structure of the discharge tube 12 of the fluorescent lamp 10 for constituting the surface light source may have a straight tubular structure, or may have a curved structure. The structure of the discharge tube 12 may have a structure required according to the characteristics of the device on which the surface light source device is to be mounted.

As described above, the configuration and operation of a fluorescent lamp having a coil antenna and a surface light source device using the same according to a preferred embodiment of the present invention have been described according to the above description and drawings, but this is merely described as an example and the present invention. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the invention.

According to the present invention as described above, a fluorescent lamp having a coil antenna electrode is a high-density plasma discharge by the first electric field generated between the electrodes and the second electric field induced by the magnetic field of each electrode to obtain a high brightness visible light. . Therefore, high brightness visible light can be obtained even if a small number of fluorescent lamps are used when mounted in a large area surface light source device. In addition, the manufacturing method of a fluorescent lamp is easy, and manufacturing cost can be made low.

Claims (44)

A tubular discharge tube coated with a phosphor layer on the inner side and filled with discharge gas; A power supply for supplying AC power; A first coil antenna electrode wound at one end of the discharge tube and connected at one end to an output end of the power supply source and open at the other end; A second coil antenna electrode wound around the other end of the discharge tube and connected to the ground and open at the other end, The induced electromotive force by the first electric field generated between the first and second coil antenna electrodes and the second electric field induced from the magnetic field generated by the first and second antenna electrodes is transferred to the discharge space inside the discharge tube, Fluorescent lamps with accelerated ions. The fluorescent lamp of claim 1, wherein the first and second coil antenna electrodes overlap two or more stages. The fluorescent lamp of claim 2, wherein the overlapping wound first and second antenna electrodes include an insulating material between each end. The fluorescent lamp of claim 1, wherein the first and second coil antenna electrodes each include a pair of antenna caps mounted on both ends of the discharge tube. 2. The apparatus of claim 1, wherein one end of the first coil antenna electrode connected to the output end of the power supply source is disposed at the end of the discharge tube and the other end opened is directed toward the center of the discharge tube; And a second end of the second coil antenna electrode connected to the ground is disposed at the end of the discharge tube, and the other end of the second coil antenna electrode is disposed toward the center of the discharge tube. The fluorescent lamp of claim 5, wherein a width of the open end coils of the first and second coil antenna electrodes is relatively wide. 6. The fluorescent lamp of claim 5, wherein the first and second coil antenna electrodes have a shape in which a width of the winding is increased while moving from both ends of the discharge tube toward the center portion. According to claim 1, One end of the discharge tube is installed on the outer surface includes a first plate electrode and the second plate electrode provided on the other end outer surface of the discharge tube, One end of the first coil antenna electrode is connected to the first plate electrode, the other end is connected to the output terminal of the power supply source, one end of the second coil antenna electrode is connected to the second plate electrode and the other end is connected to the ground. According to claim 1, comprising a first internal electrode provided in one end of the discharge tube and the second internal electrode provided in the other end, A fluorescent lamp in which one end of the first coil antenna electrode is connected to the first internal electrode, the other end is connected to the output terminal of the power supply source, one end of the second coil antenna electrode is connected to the second internal electrode, and the other end is connected to the ground. The fluorescent lamp of claim 9, wherein the first and second internal electrodes have a pole shape having a predetermined length. The fluorescent lamp of claim 9, wherein the first and second internal electrodes have a flat plate shape. 12. The fluorescent lamp of claim 11, wherein the first and second internal electrodes of the plate shape have protrusions of a conductor formed on opposite surfaces thereof. The fluorescent lamp of claim 11, wherein the first and second internal electrodes of the plate type have carbon nanotubes formed on opposite surfaces thereof. The fluorescent lamp of claim 9, wherein the first and second internal electrodes have a coil shape. 15. The fluorescent lamp of claim 14, wherein the first and second internal electrodes having a coil shape have a shape in which a width of a winding increases as both ends of the discharge tube are directed toward the center portion. The fluorescent lamp of claim 9, wherein the first and second internal electrodes have a ring shape. The fluorescent lamp of claim 9, wherein the first and second internal electrodes have a conical shape. The fluorescent lamp of claim 1, wherein the first and second coil antenna electrodes have a flat coil shape that is provided to outer surfaces of both ends of the discharge tube. 19. The method of claim 18, wherein the first and second coil antenna electrodes having a flat coil shape have a shape that increases in width from the center to the outside, and one end of the center is connected to the power supply output terminal or the ground, and the other end of the center coil is opened. Fluorescent lamps. The fluorescent lamp of claim 1, wherein the discharge tube has a straight cylindrical structure having a predetermined length. The fluorescent lamp of claim 1, wherein the discharge tube has a curved shape. The fluorescent lamp of claim 21, wherein the discharge tube has an annular shape so that both ends thereof face each other. 23. The fluorescent lamp of claim 22, comprising an antenna cap mounted on opposite ends of the discharge tube and provided with first and second coil antenna electrodes. A tubular discharge tube coated with a phosphor layer on the inner side and filled with discharge gas; A power supply for supplying AC power; A first coil antenna electrode provided at one end of the discharge tube, the first coil antenna electrode is protruded outward of the discharge tube and connected to a power supply output end, and the other end is wound in a coil shape inside the discharge tube; The second coil antenna electrode, the second coil antenna electrode, which is installed inside the other end of the discharge tube, one end is protruded to the outside of the discharge tube is connected to the ground and the other end is wound in a coil shape inside the discharge tube, The induced electromotive force by the first electric field generated between the first and second coil antenna electrodes and the second electric field induced from the magnetic field generated by the first and second antenna electrodes is transferred to the discharge space inside the discharge tube, Fluorescent lamps with accelerated ions. 25. The fluorescent lamp of claim 24, wherein the first and second coil antenna electrodes have a shape in which the width of the winding increases as it goes from the both ends of the discharge tube to the center portion. 25. The method of claim 24, further comprising a first magnetic core inserted into one end of the discharge tube, a first winding wound thereon, a second magnetic core inserted into the other end of the discharge tube, and a second winding wound thereon, And a first winding is connected between the first coil antenna electrode and the output end of the power supply, and the second winding is connected between the second coil antenna ground. A power supply for supplying AC power; A plurality of tubular discharge tubes in which a phosphor layer is applied to an inner side and filled with discharge gas; Each discharge tube is once wound on the outside and the first coil antenna electrode, one end of which is connected to the output terminal of the power supply source and the other end is opened, and the second coil antenna electrode, which is wound on the other end of the discharge tube and connected to the ground and the other end of which is open Including, The induced electromotive force by the first electric field generated between the first and second coil antenna electrodes and the second electric field induced from the magnetic field generated by the first and second antenna electrodes is transferred to the discharge space inside the discharge tube, Acceleration of ions occurs; A base substrate on which a plurality of discharge tubes are arranged in parallel; A fixing member fixing a plurality of discharge tubes to the base substrate; A frame installed along an edge of the base substrate; A surface light source device including a diffuser plate installed in front of a plurality of discharge tubes to diffuse visible light emitted from the discharge tubes. 28. The surface light source device of claim 27, further comprising a reflector provided between the base substrate and the plurality of discharge tubes. 28. The surface light source device according to claim 27, wherein a plurality of first coil antenna electrodes respectively provided in the plurality of discharge tubes are connected in parallel to an output terminal of a power supply, and the plurality of second antenna coils are connected in parallel to ground. 28. The surface light source device of claim 27, comprising a current balancing circuit coupled between the power supply and the plurality of first coil antenna electrodes to balance current values through the plurality of first antenna coils. 31. The circuit of claim 30, wherein the current balancing circuit comprises a plurality of transformers, the primary windings of the plurality of transformers are connected in series between the output terminal of the power supply and ground, and the secondary windings of the plurality of transformers comprise a plurality of first coils. A surface light source device each connected to an antenna electrode. 31. The apparatus of claim 30, wherein the current balancing circuit comprises a magnetic core and a plurality of windings wound around a magnetic core in a common number of windings, one end of the plurality of windings being commonly connected to an output of a power supply and the other end of the plurality of windings. A surface light source device each connected to a first coil antenna electrode. 28. The surface light source device of claim 27, wherein the first and second coil antenna electrodes are overlapped and wound in two or more steps. 34. The surface light source device of claim 33, wherein the overlapped winding first and second antenna electrodes include an insulating material between each end. 28. The surface light source device according to claim 27, wherein the first and second coil antenna electrodes are respectively mounted and include a pair of antenna caps respectively mounted at both ends of the discharge tube. 36. The surface of claim 35, wherein the plurality of antenna caps on which the first coil antenna electrodes are mounted are integrally formed at predetermined intervals, and the plurality of antenna caps on which the second coil antenna electrodes are mounted are integrally formed at predetermined intervals. Light source device. 28. The apparatus of claim 27, wherein one end of the first coil antenna electrode connected to the output end of the power supply source is disposed at the end of the discharge tube and the other end opened is directed toward the center of the discharge tube; And one end of the second coil antenna electrode connected to the ground is positioned at the end of the discharge tube, and the other end of which is open toward the center of the discharge tube. 38. The surface light source device according to claim 37, wherein the widths of the open end coils of the first and second coil antenna electrodes are relatively wide. 38. The fluorescent lamp of claim 37, wherein the first and second coil antenna electrodes have a shape in which the width of the winding is increased toward both the centers and the centers of the discharge tubes. 28. The method of claim 27, wherein each of the plurality of discharge tubes includes a first flat plate electrode installed at one end of the discharge tube and a second flat plate electrode provided at the other end of the discharge tube. One end of the first coil antenna electrode is connected to the first plate electrode, the other end is connected to the output terminal of the power supply source, one end of the second coil antenna electrode is connected to the second plate electrode and the other end is connected to the ground. 28. The method of claim 27, wherein each of the plurality of discharge tubes includes a first internal electrode once installed inwardly and a second internal electrode provided inwardly of the other end, One end of the first coil antenna electrode is connected to the first internal electrode, the other end is connected to the output terminal of the power supply source, one end of the second coil antenna electrode is connected to the second internal electrode and the other end is connected to the ground. 28. The surface light source device according to claim 27, wherein the first and second coil antenna electrodes have a flat coil shape that is provided to outer surfaces of both ends of the discharge tube. 28. The surface light source device of claim 27, wherein the discharge tube has a cylindrical structure having a predetermined length. The fluorescent lamp of claim 27, wherein the discharge tube has a curved shape.

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