JP3171622B2 - Fluorescent discharge lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent discharge lamp which can be used as a light source required for a liquid crystal display, a copying machine, a facsimile and the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, both ends are closed by end plates 1a and 1b, and have a slight length on the inner surface 2 including those on both ends 1a and 1b. The phosphor layer 3 is uniformly formed over the entire area except on the inner surfaces of the ends 1d and 1e.
It is made of a rare gas such as xenon gas that emits ultraviolet rays by receiving discharge, or argon, krypton,
A transparent insulating tube 1 made of, for example, glass, enclosing an enclosure 4 made of a rare gas such as neon gas or xenon gas and mercury, and an end of the light-transmitting insulating tube 1. Ends 1d and 1 having a slight length on the side of plate portions 1a and 1b
e, two electrodes 6 and 7 extending in a strip shape continuously between both end edges in the longitudinal direction are provided on the outer surface 5 of the portion 1f having a long length except for a part of the tube axis 0-. There has been proposed a fluorescent discharge lamp having a configuration in which the fluorescent discharge lamps are arranged to face each other with 0 therebetween.

According to the conventional fluorescent lamp having such a configuration, an AC voltage having a relatively high frequency such as 30 KHz and a relatively high voltage such as 1 KV is applied between the electrodes 6 and 7. When the obtained AC power supply 8 is connected, discharge is caused by the enclosure 4 in the light-transmitting insulating tube 1, whereby ultraviolet light is emitted inside the light-transmitting insulating tube 1, and the ultraviolet light causes the light to pass through. The phosphor layer 3 formed on the inner surface 2 of the light-insulating tube 1 is irradiated over the entire area thereof. Therefore, light emission is obtained by a mechanism in which light can be obtained from the entire area of the phosphor layer 3. And the light is
It radiates out of the translucent insulating tube 1. Therefore, it can be used as a light source required for a liquid crystal display device, a copying machine, a facsimile, and the like.

In the case of the conventional fluorescent discharge lamp shown in FIG. 4, since the electrodes 6 and 7 are not arranged in the translucent insulating tube 1, the electrodes 6 and 7 are not damaged by the above-mentioned discharge. Therefore, the life of the fluorescent discharge lamp is longer than the case where the electrodes 6 and 7 are arranged in the light-transmitting insulating tube 1, and the electrodes 6 and 7 of the fluorescent discharge lamp are light-transmitting. There is an advantage that the configuration can be made easily as compared with the case where the configuration is provided in the insulating tube body 1.

[0005]

In the case of the conventional fluorescent lamp shown in FIG. 4, the electrodes 6 and 7 are long except for the ends 1d and 1e of the light-transmitting insulating tube 1 which have a small length. On the outer surface 5 of the portion 1f having the length, the electrodes 6 and 7 of the phosphor layer 3 extend continuously in a strip shape between both end edges in the length direction, with respect to the entire area of the phosphor layer 3. The ratio of the area occupied by the region corresponding to the region where is arranged is relatively large. For this reason, the region corresponding to the region where the electrodes 6 and 7 of the phosphor layer 3 are arranged and the region in the vicinity thereof are:
Due to the ions generated in the light-transmitting insulating tube body 1 due to the above-described discharge, the light-emitting element is deteriorated earlier than other areas, so that the luminous efficiency of the fluorescent discharge lamp is reduced. It had the disadvantage of being large.

The electrodes 5 and 6 are made of a light-transmitting insulating tube 1.
On the outer surface 5 of the portion 1f having a long length excluding the ends 1d and 1e having a small length of the tube shaft, the tube extends continuously between both longitudinal edges thereof in a strip shape. Since the electrodes 6 and 7 have a light-shielding property, light obtained by the above-described mechanism is transmitted to the tube axis 0-0 of the translucent insulating tube 1 because the electrodes 6 and 7 have a light-shielding property. When viewed outward in the radiating direction, only the direction in which a local area where the electrodes 6 and 7 of the light-transmitting insulating tube 1 are not disposed is radiated to the outside, and therefore, in use, the light-transmitting light is transmitted. However, there is a drawback in that there is a limitation on the orientation of the outer surface of the insulating tubular body 1.

Further, electrodes 6 and 7 are formed on the outer surface 5 of the long portion 1f excluding a part of both ends 1d and 1e having a small length of the light-transmitting insulating tube 1. Because it is continuously extended between both edges in the vertical direction, in use, from the viewpoint of safety, the electrode 6 is placed around the fluorescent discharge lamp.
And 7 need to be insulated from the light-transmitting insulating tube 1 corresponding to the long-length portion 1f excluding a part of both ends 1d and 1e having a small length. Need to be applied in the long length area, thus
There was a disadvantage that it was difficult to provide the insulation.

In use, when a conductor is closely opposed over the entire length of the light-transmitting insulating tube 1, stray capacitance is formed between the conductor and each of the electrodes 6 and 7. Electrodes 6 and 7 are provided on the outer surface 5 of the long-length portion 1f except for a small length of both ends 1d and 1e of the light-transmitting insulating tube 1 at both ends in the length direction. Since the belt extends continuously between the electrodes, the area where the electrodes 6 and 7 face the conductor is relatively large, and therefore, the above-mentioned stray capacitance is relatively large. However, an AC power supply having a large capacity is provided as a leakage current through the stray capacitance between the conductor and the electrodes 6 and 7 and through the conductor to the outside as a leakage current. And, based on the large leakage current, Kina noise is induced, it had the disadvantage.

Further, in the case of the conventional fluorescent discharge lamp shown in FIG. 4, if the AC power supply 8 is connected between the electrodes 6 and 7 as described above, the discharge by the enclosure 4 in the light-transmitting insulating tube 1 is performed. The discharge occurs when the AC power supply 8 is connected between the electrodes 6 and 7 when the fluorescent discharge lamp is irradiated with external light, cosmic rays, or the like. Phosphor layer 3
This is because electrons including electrons emitted into the light-transmitting insulating tube 1 from the surface or the like existed in the light-transmitting insulating tube 1 as initial electrons. However, in the case of the conventional fluorescent discharge lamp shown in FIG. 4, at the very beginning when an AC power supply 8 is connected between the electrodes 6 and 7, there is no means for positively supplying initial electrons to the transparent insulating tube 1. At the beginning when the AC power supply 8 is connected between the electrodes 6 and 7, the initial electrons are sufficiently generated in the light-transmitting insulating tube 1 so that the discharge can occur reliably and promptly. Sometimes there is no such thing.

For this reason, even if an AC power supply 8 is connected between the electrodes 6 and 7, no discharge occurs, and even if a discharge occurs, it takes a relatively long time until the discharge reaches a steady state. The time required for the discharge to reach a steady state varies, and therefore, an AC power supply 8 is provided between the electrodes 6 and 7.
Is connected, the light radiated outside the light-transmitting insulating tube 1 is not obtained, or the light radiated outside the light-transmitting insulating tube 1 is obtained, The time from when the AC power supply 8 is connected to the time when the light radiated to the outside of the light-transmitting insulating tube 1 is obtained in a steady state, that is, the lighting delay time is relatively long, However, there is a disadvantage that the time required for the light to be emitted to reach a steady state varies.

Thus, the present invention is free from the disadvantages mentioned above,
It is intended to propose a new fluorescent discharge lamp.

[0012]

The fluorescent lamp according to the first aspect of the present invention has both ends closed by first and second end plates, as in the case of the conventional fluorescent lamp described above with reference to FIG. And, while forming a phosphor layer on the inner surface,
A light-transmitting insulating tube enclosing a noble gas or a noble gas-mercury filling therein; and a first and a second light-transmitting insulating tube on the outer surface of the light-transmitting insulating tube. Are arranged as main electrodes.

However, the fluorescent lamp according to the first aspect of the present invention is the fluorescent lamp having the above-described structure, wherein (i) the first and second electrodes are formed of the first electrode of the transparent insulating tube. And extending only on the outer surfaces of the local first and second ends on the side of the second end plate, respectively, and (ii) any one of the first and second end plates. On one or both sides, a linear electron-emitting metal conductor slightly extending into and out of the light-transmitting insulating tube is disposed, and (iii) the electron-emitting metal conductor is at least light-transmitting insulating. The portion extending into the tube is made of a metal conductor material having a getter function for absorbing components other than the inclusions in the light-transmitting insulating tube.

Further, the fluorescent discharge lamp according to the second aspect of the present invention is the fluorescent discharge lamp according to the first aspect of the present invention, wherein only the outer surface of the translucent insulating tube is locally extended. At least one third electrode is arranged as another main electrode.

[0015]

According to the first aspect of the present invention, the first and second electrodes have a long length excluding both ends having a small length of the translucent insulating tube. On the outer surface of the local portion of the light-transmitting insulating tube, instead of being continuously arranged in a strip shape on the outer surface of the portion having the portion between both end edges in the longitudinal direction and arranged opposite to each other, , And one or both of the first and second end plates are provided with a linear electron emission slightly extending into and out of the transparent insulating tube. Since it has the same configuration as the conventional fluorescent discharge lamp described above with reference to FIG. 4 except that a metal conductor is provided, the first fluorescent lamp similar to the conventional fluorescent discharge lamp described above with reference to FIG. If an AC power source is connected between the second electrode and the second electrode, a discharge due to the enclosure occurs in the light-transmitting insulating tube, Therefore, ultraviolet radiation is generated in the light-transmitting insulating tube, and the ultraviolet light irradiates the phosphor layer formed on the inner surface of the light-transmitting insulating tube over the entire area. Light emission is obtained by a mechanism that light is obtained from the entire area of the layer, and the light is emitted outside the light-transmitting insulating tube. Therefore, as in the case of the conventional fluorescent discharge lamp described above with reference to FIG. 4, it can be used as a light source required for a liquid crystal display device, a copying machine, a facsimile, and the like.

Since the first and second electrodes are not disposed in the light-transmitting insulating tube, as in the case of the conventional fluorescent discharge lamp described above with reference to FIG. 4, the first and second electrodes are not provided. Is not damaged by the above-described discharge, so that the life of the fluorescent lamp is the same as that of the conventional fluorescent lamp described above with reference to FIG. The fluorescent lamp is longer than when the fluorescent lamp is disposed, and the first and second electrodes are disposed in the light-transmitting insulating tube in the same manner as the conventional fluorescent lamp described above with reference to FIG. The configuration can be made easier than in the case where it is performed.

However, in the case of the fluorescent discharge lamp according to the first aspect of the present invention, the first and second electrodes are respectively extended only on the outer surfaces of the local end portions of the light-transmitting insulating tube. Therefore, the ratio of the area occupied by the area corresponding to the area where the first and second electrodes of the phosphor layer are occupied and the area occupied by the area relative to the entire area of the phosphor layer in FIG. It is much smaller than the conventional fluorescent lamp described above. For this reason, the first and second phosphor layers
The region corresponding to the region where the electrodes are arranged and the region in the vicinity thereof are deteriorated earlier than the other regions due to ions generated in the light-transmitting insulating tube due to the above-described discharge. The luminous efficiency of the fluorescent discharge lamp is reduced, and the amount of the reduction is much smaller than that of the conventional fluorescent discharge lamp described above with reference to FIG.

Further, the first and second electrodes are arranged to extend only on the outer surfaces of the local end portions of the light-transmitting insulating tube, and do not extend on the outer surfaces of the other portions. Even if the first and second electrodes have a light-shielding property, the light obtained by the above-described mechanism is transmitted through the light-transmitting insulating tube except for a small length of both ends. Obtained by radiating outward in all directions of 360 ° when viewed outward in the radial direction from the tube axis of the insulating tube, and thus restricting the orientation of the outer surface of the transparent insulating tube in use. Has substantially no.

Further, since the first and second electrodes are respectively extended only on the outer surfaces of the local end portions of the light-transmitting insulating tube, the first and second electrodes can be used in view of safety. Even when it is necessary to insulate the area around the fluorescent discharge lamp from the first and second electrodes, the insulation may be provided only in a short length region corresponding to both ends of the light-transmitting insulating tube. Therefore, the insulation can be easily provided as compared with the case of the conventional fluorescent discharge lamp described above with reference to FIG.

In use, a stray capacitance is formed between the conductor and each of the first and second electrodes by the conductors being closely opposed to each other over the entire length of the light-transmitting insulating tube. Even in this case, the first and second electrodes are opposed to the conductor because the first and second electrodes are respectively extended only on the outer surfaces of the local end portions of the translucent insulating tube. 4 is much smaller than that of the conventional fluorescent lamp described above with reference to FIG. 4, and therefore, the above-mentioned stray capacitance is much smaller than that of the conventional fluorescent lamp described above with reference to FIG. And therefore, if the current from the AC power supply leaks through the stray capacitance between the conductor and the first and second electrodes and through the conductor to the outside as leakage current, However, as compared with the conventional fluorescent discharge lamp described above with reference to FIG. And thus, as the AC power supply, FIG. 4
It is sufficient to prepare a lamp having a significantly smaller capacity than the conventional fluorescent discharge lamp described above, and even if noise is induced based on the leakage current, the noise is reduced as shown in FIG. It is much smaller than the conventional fluorescent lamp described above.

Furthermore, in the case of the fluorescent discharge lamp according to the first aspect of the present invention, when an AC power source is connected between the first and second electrodes, a discharge due to an enclosure occurs in the light-transmitting insulating tube. Similarly to the case of the conventional fluorescent lamp described above with reference to FIG. 4, at the beginning when an AC power source is connected between the first and second electrodes, the fluorescent lamp receives irradiation with external light, cosmic rays, or the like. The inner surface of the transparent insulating tube, the surface of the phosphor layer,
This is because electrons including electrons emitted into the light-transmitting insulating tube from the surface of the electron-emitting metal conductor were present as initial electrons in the light-transmitting insulating tube. In the case of a discharge lamp, a linear electron-emitting metal conductor slightly extending into and out of the light-transmitting insulating tube is disposed on one or both of the first and second end plates, and , The metal conductor for electron emission,
And one or both of the second electrodes via a capacitance, an AC potential corresponding to an AC voltage applied from an AC power supply is applied between the first and second electrodes. Therefore, at the very beginning when an AC power supply is connected between the first and second electrodes, electrons are effectively emitted from the electron-emitting metal conductor into the light-transmitting insulating tube as initial electrons.

For this reason, the metal conductor for electron emission effectively acts as a means for supplying initial electrons into the light-transmitting insulating tube at the beginning when an AC power source is connected between the first and second electrodes. Therefore, at the beginning when the AC power supply is connected between the first and second electrodes, the initial electrons are present in the light-transmitting insulating tube only enough to cause a reliable and quick discharge. .

Therefore, if an AC power source is connected between the first and second electrodes, the discharge caused by the enclosure immediately and reliably occurs in the light-transmitting insulating tube in a steady state. Light radiated out of the insulating tube can be obtained immediately and in a steady state with almost no lighting delay time.

In the fluorescent lamp according to the first aspect of the present invention, since the electron-emitting metal conductor is led out of the light-transmitting insulating tube, the fluorescent lamp is used before the fluorescent lamp is used for the first time. Before each use of the discharge lamp, (i) when the electron-emitting metal conductor is disposed only at the first (or second) end plate portion, the first (or second) A second (or second) on a local second (or first) end on the second (or first) end plate side of the electron-emitting metal conductor and the light-transmitting insulating tube at the end plate. An AC power source is connected between the first and second electrodes, and (ii) when the electron-emitting metal conductor is disposed on the first and second end plates, the electrons on the first end plate are disposed. Between the emitting metal conductor and the second electrode on the local second end on the second end plate side of the translucent insulating tube; Or between the electron-emitting metal conductor on the second end plate and the first electrode on the local first end on the first end plate side of the translucent insulating tube, or By connecting an AC power supply between the electron-emitting metal conductor on the first end plate and the electron-emitting metal conductor on the second end plate, a discharge is obtained in the light-transmissive insulating tube, whereby the light is transmitted. The surface of the portion of the metal conductor for electron emission facing the light-transmitting insulating tube due to ions generated in the light-transmitting insulating tube,
It is possible to effectively clean to an easily electron-emitting state in a short time.

For this reason, the electron emitting metal conductor is connected to the AC power source between the first and second electrodes, and the AC power source is connected between the first and second electrodes when a fluorescent discharge lamp is used. At the beginning of the connection, the initial electrons can be more effectively supplied to the light-transmitting insulating tube, so that the discharge in the light-transmitting insulating tube is more quickly generated in a steady state. Therefore, light radiated outside the light-transmitting insulating tube can be obtained more quickly in a steady state.

Further, according to the fluorescent discharge lamp according to the first aspect of the present invention, at least a portion in which the electron-emitting metal conductor extends into the light-transmitting insulating tube, the sealing material in the light-transmitting insulating tube. Since it is a metal conductor material that has a getter function to absorb other components, even if components other than the encapsulation are mixed in the translucent insulating tube, it may also be used in the translucent insulating tube, Even if the components are generated, the components can be absorbed, so that the discharge inside the light-transmitting insulating tube can be favorably generated, and therefore, the light radiated out of the light-transmitting insulating tube can be improved. Can be obtained.

Further, according to the fluorescent discharge lamp according to the second aspect of the present invention, in the fluorescent discharge lamp according to the first aspect of the present invention or the fourth aspect of the present invention, a local portion of the transparent insulating tube is provided. Since at least one third electrode is arranged as another main electrode only on the outer surface during the extension, one end of the AC power supply is connected to the first and second electrodes.
And the other end is connected to the third electrode, so that even if the light-transmitting insulating tube is curved and elongated, the case of the fluorescent discharge lamp according to the first invention of the present application is the same. A similar effect can be obtained.

[0028]

Embodiment 1 Next, a first embodiment of a fluorescent discharge lamp according to the present invention will be described with reference to FIG. 1, the same reference numerals are given to the portions corresponding to FIG.

The fluorescent lamp according to the present invention shown in FIG. 1 has both ends closed by end plates 1a and 1b and has both ends on the inner surface 2 as in the case of the conventional fluorescent lamp described above with reference to FIG. The phosphor layer 3 is uniformly formed over the entire area except for the inner surfaces of the ends 1d and 1e having a slight length including those of the plate parts 1a and 1b,
The inside is filled with an enclosure 4 made of a rare gas such as xenon gas which emits ultraviolet rays by receiving a discharge, or a mercury and a rare gas such as argon, krypton, neon, xenon gas and mercury. And a light-transmitting insulating tube 1 made of
Only on the outer surfaces 9 and 10 at both ends 1g and 1h which are longer than the local ends 1d and 1e but have a small length, including the ends 1d and 1e respectively having a small length. The two electrodes 6 and 7 are at the end 1
The outer surfaces of the portions 1i and ij excluding d and 1e, respectively, are arranged so as to surround the entire outer surface thereof and extend in a ring shape.

In this case, it should be noted that the end plates 1a and 1b are formed integrally with the translucent insulating tube body 1 by the same material.

The electrodes 6 and 7 may be a conductive foil such as a copper foil, an annular conductor, or a conductive paint.

Further, a light-transmitting insulating tube is formed by airtightly crossing one of the end plate portions 1a and 1b, in the drawing, the end plate portion 1a along the tube axis 0-0. 1 linear electron emitting metal conductor 2 slightly extending in and out
1 is arranged.

In this case, the metal conductor 21 for electron emission is composed of a portion 21a extending into the light-transmitting insulating tube 1 and another portion 21b. The extending portion 21a is made of a metal conductor material having a getter function of absorbing unnecessary components other than the filling material 4 in the translucent insulating tube 1, such as zirconium, titanium, and tantalum.

The above is the configuration of the first embodiment of the fluorescent discharge lamp according to the present invention. According to the fluorescent discharge lamp according to the present invention having such a configuration, the electrodes 6 and 7 have the long length excluding both ends 1d and 1e having the slight length of the translucent insulating tube 1. 1f, the local end portions 1 of the light-transmitting insulating tube 1 are provided instead of being continuously arranged in a strip shape between the both end edges in the longitudinal direction and facing each other.
g and 1h, only the outer surfaces 9 and 10 are respectively extended, and the metal conductor 21 for electron emission facing the inside of the translucent insulating tube 1 is arranged on the end plate 1a. Except for the conventional fluorescent discharge lamp described above with reference to FIG. 4, it has the same configuration as that of the conventional fluorescent discharge lamp described above with reference to FIG. 8, a similar discharge is caused by the enclosure 4 in the light-transmitting insulating tube 1, whereby ultraviolet light is similarly emitted in the light-transmitting insulating tube 1, and the ultraviolet light causes the light to pass through. The phosphor layer 3 formed on the inner surface of the light-insulating tube 1 is similarly irradiated over the entire area thereof.
Light emission is obtained by a mechanism that light emission is similarly obtained from the entire area of the phosphor layer 3, and the light is similarly emitted outside the light-transmitting insulating tube 1. Therefore, as in the case of the conventional fluorescent discharge lamp described above with reference to FIG. 4, it can be used as a light source required for a liquid crystal display device, a copying machine, a facsimile, and the like.

Since the electrodes 6 and 7 are not disposed in the light-transmitting insulating tube 1 as in the case of the conventional fluorescent lamp described above with reference to FIG. 4, the electrodes 6 and 7 are damaged by the discharge. Therefore, the life of the fluorescent lamp is assumed to be the same as that of the conventional fluorescent lamp described above with reference to FIG. 4, and the electrodes 6 and 7 are arranged in the translucent insulating tube 1. In addition to the case where the electrodes 6 and 7 are disposed in the light-transmitting insulating tube 1 as in the case of the conventional fluorescent discharge lamp described above with reference to FIG. In comparison, it can be easily configured.

However, in the case of the fluorescent lamp according to the invention shown in FIG. 1, the electrodes 6 and 7 extend only on the outer surfaces 9 and 10 at the local ends 1g and 1h of the translucent insulating tube 1, respectively. The ratio of the area occupied by the region corresponding to the region where the electrodes 6 and 7 of the phosphor layer 3 are arranged and the region in the vicinity thereof with respect to the entire area of the phosphor layer 3 is: It is much smaller than the conventional fluorescent discharge lamp described above with reference to FIG. For this reason, the region corresponding to the region where the electrodes 6 and 7 of the phosphor layer 3 are arranged and the region in the vicinity thereof are affected by the ions generated in the light-transmitting insulating tube 1 by the above-described discharge, thereby causing other regions. The luminous efficiency of the fluorescent discharge lamp is reduced due to deterioration earlier than the region, and the amount of the reduction is much smaller than that of the conventional fluorescent discharge lamp described above with reference to FIG.

The electrodes 6 and 7 are made of a transparent insulating tube 1
Outer surfaces 9 and 10 at local ends 1g and 1h
Since the electrodes 6 and 7 have light-shielding properties, the light obtained by the above-described mechanism is not transmitted to the light-transmitting insulating tube 1 because they are arranged only on the upper side and do not extend on the outer surface of the other parts. From the part excluding both ends 1g and 1h of a slight length from the tube axis 0-0 of the translucent insulating tube 1 in the radial direction,
Obtained by radiating outward in all directions of 360 °,
In use, there is substantially no restriction on the orientation of the outer surface of the light-transmitting insulating tube 1.

Further, the electrodes 6 and 7 are provided on the outer surfaces 9 and 1 at local end portions 1g and 1h of the translucent insulating tube 1.
Because each is extended only on 0,
In use, around the fluorescent discharge lamp from the aspect of safety,
Even when it is necessary to insulate the electrodes 6 and 7 from each other, the insulation only needs to be provided in the short-length regions corresponding to both ends 1g and 1h of the light-transmitting insulating tube 1.
The insulation can be provided more easily than in the case of the conventional fluorescent discharge lamp described above with reference to FIG.

In use, a stray capacitance is formed between the conductor and each of the electrodes 6 and 7 by the conductor being closely opposed to the translucent insulating tube 1 over its entire length. However, since the electrodes 6 and 7 extend only on the outer surfaces 9 and 10 of the local ends 1g and 1h of the translucent insulating tube 1, respectively, the electrodes 6 and 7 face the conductor. 4 is much smaller than that of the conventional fluorescent lamp described above with reference to FIG. 4, and therefore, the above-mentioned stray capacitance is much smaller than that of the conventional fluorescent lamp described above with reference to FIG. Therefore, even if the current from the AC power source 8 leaks as a leak current through the stray capacitance between the conductor and the electrodes 6 and 7 and through the conductor to the outside, the leak current becomes Compared to the case of the conventional fluorescent lamp described above with reference to FIG. Therefore, it is sufficient to prepare, as the AC power supply 8, a power supply having a much smaller capacity than that of the conventional fluorescent discharge lamp described above with reference to FIG. 4, and it is possible to reduce the noise based on the leakage current. Even if induced, the noise is much smaller than in the case of the conventional fluorescent lamp described above with reference to FIG.

Further, in the case of the fluorescent discharge lamp according to the present invention shown in FIG. 1, when the AC power supply 8 is connected between the electrodes 6 and 7, the discharge caused by the enclosure 4 in the translucent insulating tube 1 occurs. Similarly to the case of the conventional fluorescent lamp described above with reference to FIG. 4, at the beginning when the AC power supply 8 is connected between the electrodes 6 and 7, the fluorescent lamp is irradiated with external light, cosmic rays, or the like. From the inner surface of the light-transmitting insulating tube 1, the surface of the phosphor layer 3, the surface of the electron-emitting metal conductor 21, etc.
This is because electrons including electrons emitted into the light-transmitting insulating tube 1 exist as initial electrons in the light-transmitting insulating tube 1. In the case of the fluorescent discharge lamp according to the present invention shown in FIG. Electron emitting metal conductor 21 facing inside optically insulating tube 1
Is disposed on the electron-emitting metal conductor 21 and the electrode 6 is connected to the electrode 6 via a capacitance between them. Since an AC potential corresponding to the AC voltage applied from the AC power supply 8 is applied, at the beginning when the AC power supply 8 is connected between the electrodes 6 and 7, electrons are transmitted from the electron-emitting metal conductor 21 to a light-transmitting insulating material. The electrons are effectively emitted into the tube 1 as initial electrons.

For this reason, at the very beginning when the AC power supply 8 is connected between the electrodes 6 and 7, the electron-emitting metal conductor 21 serves as a means for supplying initial electrons into the light-transmitting insulating tube 1.
It works effectively and therefore an AC power supply 8 between the electrodes 6 and 7
At the beginning of the connection, there are enough initial electrons in the translucent insulating tubular body 1 to generate a reliable and rapid discharge.

Therefore, if an AC power supply 8 is connected between the electrodes 6 and 7, the discharge by the enclosure 4 immediately and reliably occurs in the translucent insulating tube 1 in a steady state. Light radiated out of the conductive insulating tube 1 can be reliably obtained immediately and in a steady state with almost no lighting delay time.

Further, according to the fluorescent discharge lamp of the present invention shown in FIG. 1, since the electron emission metal conductor 21 is led out of the translucent insulating tube 1, the fluorescent discharge lamp is used first. Before or before each use of the fluorescent discharge lamp, the electron-emitting metal conductor 21 on the end plate 1a is used.
And a local end 1h on the end plate 1b side of the light-transmitting insulating tube 1
By connecting an AC power supply 8 to the upper electrode 7, a discharge is obtained in the light-transmissive insulating tube 1, whereby ions generated in the light-transmissive insulating tube 1 cause the electron emission metal conductor 21. The surface of the portion facing the inside of the light-transmitting insulating tube 1 can be effectively cleaned in an easy-to-emit state in a short time.

For this reason, the metal conductor 21 for electron emission was connected to the AC power supply 8 between the electrodes 6 and 7, and the AC power supply 8 was connected between the electrodes 6 and 7 when a fluorescent discharge lamp was used. At the beginning, the initial electrons can be more effectively supplied into the light-transmissive insulating tube 1, so that the discharge in the light-transmissive insulating tube 1 is more quickly generated in a steady state. Therefore, light radiated out of the light-transmitting insulating tube 1 can be obtained more quickly in a steady state.

Further, in the case of the fluorescent discharge lamp according to the present invention shown in FIG.
In the portion 21a extending inward, the light-transmitting insulating tube 1
Since it is made of a metal conductor material having a getter function for absorbing components other than the encapsulation 4 therein, even if components other than the encapsulation 4 are mixed in the translucent insulating tube 1, Even if components other than the enclosure 4 are generated by use in the transparent insulating tube 1, those components can be absorbed, so that the discharge in the translucent insulating tube 1 can be favorably generated. Therefore, it is possible to satisfactorily obtain light radiated outside the light-transmitting insulating tube 1.

In use, instead of connecting the AC power supply 8 directly between the electrodes 6 and 7, both ends of the AC power supply 8 are connected to the primary coil as shown in FIG. 11a and a secondary coil 11b connecting the midpoint to ground
Respectively connected to both ends of a primary coil 11a of a transformer 11 having
Can be obtained by connecting the two ends to electrodes 6 and 7, respectively, to radiate light out of the transparent insulating tube 1 in the same manner as described above. When the power supply 8 is directly connected between the electrodes 6 and 7, unevenness in the emission intensity distribution, such as a difference in emission intensity between one side and the other side of the electrodes 6 and 7, occurs. , Does not substantially occur.

[0047]

Embodiment 2 Next, a second embodiment of the fluorescent lamp according to the present invention will be described with reference to FIG. 2, parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The fluorescent discharge lamp according to the present invention shown in FIG. 2 has the same light-transmitting insulating tube 1 as the electron-emitting metal conductor 21 disposed on the end plate 1a even at the position of the end plate 1b. It consists of a part 22a extending inside and another part 22b,
Then, the portion 22a extending into the translucent insulating tube 1
However, except that an electron emission metal conductor 22 made of a metal conductor material having a getter function for absorbing unnecessary components other than the filling material 4 in the translucent insulating tube body 1 is similarly arranged. 1 has the same configuration as the fluorescent lamp according to the present invention described above.

According to the fluorescent discharge lamp according to the present invention having the above-described structure, except for the above-described matter, it has the same structure as the fluorescent discharge lamp according to the present invention described above with reference to FIG.
Although detailed description is omitted, the same operation and effect as in the case of the fluorescent discharge lamp according to the present invention described above with reference to FIG. 1 can be obtained.

However, in the case of the fluorescent discharge lamp according to the present invention shown in FIG. 2, the electron emitting metal conductors 21 and 22 are disposed on the end plates 1a and 1b, respectively. Are connected to the electrodes 6 and 7 via the capacitance between them, respectively.
Electrodes 6 and 7 are attached to these electron emission metal conductors 21 and 22.
Since an AC potential corresponding to the AC voltage applied between the electrodes 6 and 7 is provided, at the beginning when the AC power supply 8 is connected between the electrodes 6 and 7,
Electrons are effectively emitted as initial electrons into the light-transmitting insulating tube 1, and therefore, if an AC power supply 8 is connected between the electrodes 6 and 7, discharge will occur in the light-transmitting insulating tube 1. Therefore, the light radiated to the outside of the light-transmitting insulating tube 1 can be immediately and reliably obtained in a steady state with almost no lighting delay time.

[0051]

Third Embodiment Next, a third embodiment of the fluorescent lamp according to the present invention will be described with reference to FIG. 3, parts corresponding to those in FIG. 1 are denoted by the same reference numerals.

In the fluorescent lamp according to the present invention shown in FIG. 3, the light-transmitting insulating tube 1 is bent in a W-shape to extend long, and the light-transmitting insulating tube 1 is locally extended. Only on the outer surface 13 at the local central part 1k as the upper part, except that the other electrodes 12 are arranged in the same way as the electrodes 6 and 7 on the outer surfaces 9 and 10 at both ends 1g and 1h. Has the same configuration as the fluorescent discharge lamp according to the present invention described above with reference to FIG.

According to the fluorescent discharge lamp according to the present invention having the above-described structure, except for the above-described matter, it has the same structure as the fluorescent discharge lamp according to the present invention described above with reference to FIG.
Although not described in detail, as shown in the figure, for example, one end of an AC power supply 8 is connected to both the electrodes 6 and 7 and the other end is connected to the electrode 1.
2, it is apparent that the same effect as that of the fluorescent lamp according to the present invention described above with reference to FIG. 1 can be obtained even if the translucent insulating tube 1 is curved and elongated. is there.

In the above description, only a few examples of the present invention are shown. In the configuration of the fluorescent discharge lamp according to the present invention shown in FIGS. 1 and 2, the light-transmitting insulating tube 1 is bent and extended. And a plurality of electrodes may be provided only on a plurality of locally extending portions of the translucent insulating tube 1.
It is also possible to adopt a configuration in which the fluorescent lamps according to the present invention described above with reference to FIG.

[Brief description of the drawings]

FIG. 1 is a schematic plan view (FIG. 1A) showing a first embodiment of a fluorescent discharge lamp according to the present invention, a part of which is shown in cross section, and a longitudinal sectional view showing a portion where electrodes are arranged (FIG. 1A). 1B).

FIG. 2 is a schematic plan view, partly in section, showing a second embodiment of the fluorescent discharge lamp according to the invention.

FIG. 3 is a schematic plan view showing a third embodiment of the fluorescent discharge lamp according to the present invention.

FIG. 4 is a schematic plan view (FIG. 4A) and a longitudinal sectional view (FIG. 4B) showing a part of the conventional fluorescent discharge lamp in a cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent insulating tube body 1a, 1b End plate part 1d, 1e, 1g, 1h, 1i, 1j, 1k End part 2 Inner surface 3 Phosphor layer 4 Enclosure 5 Outer surface 6, 7 Electrode 8 AC power supply 9, 10 Outer surface 11 Transformer 21, 22 Electron-emitting metal conductor 21a, 21b Part of electron-emitting metal conductor 21

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-154450 (JP, A) JP-A-58-111251 (JP, A) JP-A-61-185858 (JP, A) 116443 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 65/00

Claims (2)

(57) [Claims] An enclosure in which both ends are closed by first and second end plates, a phosphor layer is formed on an inner surface, and a rare gas or a rare gas and mercury are contained inside. A fluorescent discharge lamp having a light-transmitting insulating tube enclosing the first electrode and a first electrode disposed on an outer surface of the light-transmitting insulating tube as a main electrode; And a second electrode extending only on the outer surface of the first and second end portions on the first and second end plate portions of the translucent insulating tube, respectively, and A linear electron emission metal conductor slightly extending into and out of the transparent insulating tube is disposed on one or both of the first and second end plate portions; At least a portion where the metal conductor extends into the light-transmitting insulating tube. Fluorescent discharge lamp characterized by comprising a metallic conductor material having a getter function of absorbing component other than the inclusion of the body. 2. The fluorescent discharge lamp according to claim 1, wherein at least one third electrode is arranged as another main electrode only on the outer surface of the translucent insulating tube at a locally extended portion. A fluorescent lamp.