JP2003272561A - Gas discharge tube and display device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To arrange an electron emission film with an even thickness inside a gas discharge tube. <P>SOLUTION: In a gas discharge tube with an electron emission film inside a tubing which forms a discharge space, the electron emission film is arranged in the discharge space by forming the electron emission film on a support member independently of the tubing, and inserting the support member into the tubing. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge tube, and more particularly to a gas discharge tube using a thin tube having a diameter of about 0.5 to 5 mm.

[0002]

2. Description of the Related Art A display device is known in which a plurality of gas discharge tubes are arranged in parallel to display an arbitrary image. The gas discharge tube of this display device uses a thin tube having a diameter of about 0.5 to 5 mm.

Conventionally, in a gas discharge tube using such a thin tube, an electron having a function of lowering a discharge starting voltage by generating charged particles on the inner surface of the thin tube by collision with a discharge gas having energy higher than a certain value. When forming a release film, for example, a MgO film, a solution of fatty acid magnesium is applied to the inner surface of the thin tube by a spin coating method or the like, and the applied layer is fired.

In this case, if the thin tube is short (approximately 300
mm or less), the MgO film can be applied relatively uniformly to the inner surface of the thin tube. Further, when the coating layer is fired, if the inner diameter of the thin tube is sufficiently large (4 mm or more), resistance to air introduction into the thin tube is low (high ventilation conductance), and firing is easy.

[0005]

However, if the length of the thin tube exceeds 300 mm, it is difficult to uniformly apply the MgO film to the inner surface of the thin tube by the spin coating method. Further, when the inner diameter of the thin tube is 2 mm or less, when the coating layer is fired, oxygen necessary for burning the organic component of the fatty acid magnesium is insufficient inside the thin tube, so that the organic component is not completely removed and MgO is not completely removed. The light transmittance of the film is reduced.

Therefore, it has been desired to develop a technique capable of easily forming an electron emission film on the inner surface of a thin tube having an inner diameter of 2 mm or less or a length of 300 mm or more.

The present invention has been made in consideration of such circumstances, and the electron emission film is formed on a supporting member which is separate from the thin tube, and the supporting member is arranged inside the thin tube, so that the electron The purpose is to facilitate the formation of the emission film.

[0008]

According to the present invention, in a gas discharge tube having an electron emission film inside a thin tube forming a discharge space, the electron emission film is formed on a support member independent of the thin tube and the support is provided. It is a gas discharge tube in which a member is inserted into the thin tube and arranged in a discharge space.

According to the present invention, the electron emission film can be formed on the supporting member outside the thin tube, and the supporting member can be inserted into the thin tube and placed in the discharge space. Therefore,
For example, when the supporting member is composed of a plurality of tubular members shorter than the narrow tube or a semi-cylindrical member, the coating liquid for forming the electron emission film can be uniformly applied. Further, it is possible to prevent uneven baking due to lack of oxygen during baking of the coating film. This makes it possible to easily form a good electron emission film.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The gas discharge tube of the present invention may be formed by using a thin tube having any diameter, but particularly, a diameter of 0.
It is preferably formed using a thin tube of about 5 to 5 mm.
This thin tube preferably has a circular cross section, but may have a flat elliptical cross section.

The present invention has a structure in which, for example, both ends of a thin tube are sealed to form a discharge space inside the thin tube, and an electron emission film is arranged in the discharge space. In the arrangement of the electron emitting film, the electron emitting film is formed on a supporting member independent of the thin tube, and the supporting member is inserted into the thin tube to position the electron emitting film in the discharge space.

When the inner diameter of the thin tube is small, the air permeability inside the thin tube is poor, and even if an electron emission film is to be formed on the inner surface of the thin tube, it is sufficient when the coating film for forming the electron emission film applied to the inner surface of the thin tube is baked. Is not supplied with air. Therefore, in the present invention, the electron emission film is formed on the support member that can be inserted inside the thin tube. That is, the electron emission film is not formed inside the thin tube, but is formed outside the thin tube and can be introduced into the inside of the thin tube thereafter.

In the present invention, an electron emission film is formed on the support member. This electron emission film is made of MgO, CaO, S
It is composed of rO, BaO and the like. The supporting member may have any shape as long as it is independent of the thin tube, and is not particularly limited, but may have a plurality of tubular members shorter than the thin tube, or a semi-cylindrical shape obtained by dividing the tube in the longitudinal direction (hereinafter, also referred to as boat shape). It is desirable to use it as a member. It is desirable that this support member is made of a dielectric material because it causes discharge on the surface on which the electron emission film is formed.

The present invention may further include a phosphor layer formed on a support member independent of the thin tube. In this case, if the support member for the electron emission film has a tubular shape, this phosphor layer It is desirable that the support member is inserted inside the support member for the electron emission film and is arranged in the discharge space.

If the support member for the electron emission film has a boat shape having a semicircular cross section obtained by dividing the cylinder in the longitudinal direction, and the support member for the phosphor layer has the same shape as that, a semi-cylindrical electron is formed. A support member for the emission film and a support member for the phosphor layer,
It is desirable that the both are opposed to each other so as to have a cylindrical shape, and are inserted into the thin tube to be arranged in the discharge space. In this case, the cross section in which the support member for the electron emission film and the support member for the phosphor layer face each other is circular, and both have a half arc cross-sectional shape, but the invention is not limited to this.
The shape may be such that one arc is large and the other arc is small.

It is desirable to use glass as the material of the supporting member. When glass is used, if the capillary is glass, etc., when the discharge gas is introduced into the capillary and the end of the capillary is sealed, the supporting member is melted together with the capillary and chip off (melt cutting). By doing so, the support member can be fixed in the thin tube. In this case, since the glasses fit together, it is possible to prevent leakage of the thin tubes. In addition to this, the support member may be fixed in the narrow tube by using an adhesive such as low melting point glass.

The present invention also provides the above gas discharge tube,
A plurality of them are arranged side by side on a supporting substrate, and on the gas discharge tube installation surface of the supporting substrate, a plurality of signal electrodes are formed in contact with the outer wall surface of the gas discharge tube along the longitudinal direction thereof, and the surface of the gas discharge tube. Is a display device provided with a display electrode pair in a direction crossing each gas discharge tube in contact with the outer wall surface on the side.

The present invention will be described below in detail based on the embodiments shown in the drawings. The present invention is not limited to this, and various modifications are possible. The gas discharge tube of the present invention has a plurality of gas discharge tubes arranged in parallel,
It is suitably used for a display device that displays an arbitrary image. An example of this display device will be described.

FIG. 1 is an explanatory view showing an example of a display device using the gas discharge tube of the present invention. In the figure, 31 is a front side substrate, 32 is a back side substrate, 1 is a gas discharge tube, 2 is a display electrode pair (main electrode pair), and 3 is a signal electrode (also referred to as a data electrode).

Inside the thin gas discharge tube 1 (discharge space)
A support member having an electron emission film (hereinafter, referred to as a support member for the electron emission film) and a support member having a phosphor layer (hereinafter, referred to as a support member for the phosphor layer) are inserted and arranged in A discharge gas is introduced and both ends are sealed. The signal electrode 3 is formed on the substrate 32 on the back side and is provided along the longitudinal direction of the gas discharge tube 1. The display electrode pair 2 is formed on the substrate 31 on the front side and is provided in a direction intersecting with the signal electrode 3. Display electrode pair 2 and display electrode pair 2
A non-discharging region (non-discharging gap) 21 is provided between and.

The signal electrode 3 and the display electrode pair 2 are brought into close contact with the lower outer peripheral surface and the upper outer peripheral surface of the gas discharge tube 1 during assembly. An adhesive may be interposed between the electrode and the surface of the gas discharge tube for adhesion.

In a plan view of this display device, the intersection of the signal electrode 3 and the display electrode pair 2 is a unit light emitting region.
For display, one of the display electrode pairs 2 is used as a scanning electrode, a selective discharge is generated at the intersection of the scanning electrode and the signal electrode 3, and a light emitting region is selected. This is performed by using the wall charges formed on the inner surface of the tube to generate display discharge in the display electrode pair 2. Selective discharge is
The display discharge is a facing discharge generated in the gas discharge tube 1 between the scanning electrode and the signal electrode 3 facing each other in the vertical direction.
It is a surface discharge generated in the gas discharge tube 1 between two display electrodes arranged in parallel on a plane.

The electrode structure shown in the figure has a structure in which three electrodes are arranged in one light emitting portion, and a display discharge is generated by a pair of display electrodes. However, the present invention is not limited to this.
The structure may be such that display discharge is generated between the display electrode 2 and the signal electrode 3.

That is, the electrode structure is of a type in which one display electrode pair 2 is used and the display electrode 2 is used as a scanning electrode to generate a selective discharge and a display discharge (counter discharge) between the signal electrode 3. Good.

FIG. 2 is an explanatory view showing the structure of the first embodiment of the gas discharge tube. The figure shows a cross section orthogonal to the longitudinal direction of the gas discharge tube. In the figure, 1a is a thin tube serving as a gas discharge tube, 4 is a supporting member for an electron emission film, and 5 is a supporting member for a phosphor layer.

In this embodiment, the thin tube 1a has a circular cross section, is made of borosilicate glass, and has an outer diameter of 1000.
The thickness is 400 μm, the thickness is 60 μm.
Inside the thin tube 1a, a support member 4 for the electron emission film is arranged, and inside the support member 4 for the electron emission film, a support member 5 for the phosphor layer is arranged. The support member 4 for the electron emission film and the support member 5 for the phosphor layer are also made of borosilicate glass.

The thin tube 1a is manufactured by making a large base material similar to the thin tube 1a by the Dunner method and redrawing (stretching) it while heating and softening it.
The support member 4 for the electron emission film and the support member 5 for the phosphor layer are also manufactured by the same method. In addition, these are not redraw,
The final shape may be directly formed by a hot press.

The support member 4 for the electron emission film has a circular cross section which is slightly smaller than that of the thin tube 1a, and has an outer diameter 8 of the tube.
The thickness is 60 μm, the thickness is 60 μm, and the length is 200 mm. On the inner surface of the support member 4 of the electron emission film, a MgO film 4a as an electron emission film is formed with a film thickness of 0.1 to 1 μm. The MgO film 4a is formed on the inner surface of the support member 4 before the support member 4 of the electron emission film is inserted into the thin tube 1a.

The MgO film 4a is formed by coating the inner surface of the support member 4 with a solution of magnesium fatty acid by a spin coating method, drying the solution, and then baking the coating layer.

The support member 4 for the electron emission film has a length of 200
Since it is mm, the fatty acid magnesium solution can be uniformly applied to the inner surface of the support member 4. Further, with this length, oxygen required for burning the organic component of the fatty acid magnesium does not become insufficient inside the supporting member 4 during firing, so that the light transmittance of the MgO film after firing decreases. Absent. Thereby, a good MgO film can be uniformly formed on the inner surface of the support member 4.

The support member 5 for the phosphor layer has an outer diameter of 720 μm.
It has a boat shape obtained by dividing the cylinder into two parts in the longitudinal direction, has a semicircular cross section, and is manufactured with a wall thickness of 60 μm and a length of 200 mm. In the concave portion of the support member 5 of the phosphor layer, a phosphor layer 5a having a thickness of 20 to 30 μm is formed. The phosphor layer 5a is formed in the recess of the support member 5 before the support member 5 of the phosphor layer is inserted into the support member 4 of the electron emission film.

The phosphor layer 5a is formed of any one of R (red), G (green) and B (blue) phosphors necessary for full color display. The phosphor layer 5a is formed by using a phosphor known in the art, applying a paste containing the phosphor to the concave portion of the support member 5, drying the paste, and then baking the paste.

Since the phosphor layer 5a is formed outside the thin tube 1a and the support member 5 for the electron emission film, even if the paste containing the phosphor is applied to the concave portion of the support member 5 and then fired, there is insufficient oxygen. It is possible to completely burn off the organic components without becoming.

In this gas discharge tube, since the structure is a double structure of the thin tube 1a and the supporting member 4 of the electron emission film, the total thickness of the thin tube and the supporting member of the electron emission film is a single structure. In this case, it is necessary to have the same thickness as the thin tube.

FIG. 3 is an explanatory view showing the structure of the second embodiment of the gas discharge tube. The figure shows a cross section orthogonal to the longitudinal direction of the gas discharge tube. In the figure, 6 is a support member for the electron emission film, and 7 is a support member for the phosphor layer.

In this embodiment, the thin tube 1a is the same as that of the first embodiment. Inside the thin tube 1a, a support member 6 for the electron emission film and a support member 7 for the phosphor layer are arranged. The support member 6 for the electron emission film and the support member 7 for the phosphor layer are also made of borosilicate glass by redrawing.

The support member 6 for the electron emission film has an outer diameter of 860 μm.
It is a boat shape that divides a cylinder of m into two in the longitudinal direction,
The thickness is 60 μm and the length is 200 mm. In the concave portion of the support member 6 of the electron emission film, Mg as an electron emission film is formed.
The O film 6a is formed with a film thickness of 0.1 to 1 μm. Mg
The O film 6a is formed in the concave portion of the support member 6 before the support member 6 of the electron emission film is inserted into the thin tube 1a.

The MgO film 6a is formed by applying a solution of magnesium fatty acid to the concave portion of the supporting member 6 by a slot coating method, a spin coating method or the like and drying it, and then baking the coating layer.

Since the supporting member 6 for the electron emission film has a boat shape, even if the supporting member has a length exceeding 300 mm, the fatty acid magnesium solution can be uniformly applied. In addition, since there is no shortage of oxygen during firing of the coating layer of fatty acid magnesium, there is no decrease in light transmittance of the MgO film after firing. As a result, a good MgO film can be uniformly formed in the recess of the support member 6.

Further, since the support member 6 for the electron emission film has a boat shape, the MgO film is not formed by a thermal decomposition method using a coating solution such as a fatty acid magnesium solution,
The MgO film can also be formed by a method such as vapor deposition.

The support member 7 for the phosphor layer has the same shape as the support member 6 for the electron emission film, and the phosphor layer 7a is formed in the recess of the support member 7 for the phosphor layer by the same method as in the first embodiment. 20
It is formed with a thickness of ˜30 μm. The phosphor layer 7a is formed in the recess of the support member 7 before the support member 7 for the phosphor layer is inserted into the thin tube 1a.

Also in this embodiment, since the phosphor layer 7a is formed outside the thin tube 1a, even if the paste containing the phosphor is applied to the concave portion of the support member 7 and then fired, there is no shortage of oxygen. , The organic components can be completely burned out.

Also in this gas discharge tube, the structure is the thin tube 1a.
And the tube structure formed by the support member 6 for the electron emission film and the support member 7 for the phosphor layer, the total thickness of the thin tube and the support member for the electron emission film is a single layer. It must be as thick as the wall thickness of the structure.

FIG. 4 is an explanatory view showing an example in which a display device is constructed by using the above-mentioned gas discharge tube. This figure shows a state in which the display device shown in FIG. 1 is viewed in plan. In this example, the display electrode pair 2 is composed of a transparent electrode 2a and a bus electrode 2b, respectively. Signal electrodes are not shown. Thin tube 1
As for a, R, G, and B are sequentially arranged in parallel.

The thin tube 1a has a length of 400 mm, and when the supporting member 4 of the electron emitting film and the supporting member 5 of the phosphor layer of the first embodiment are arranged in the thin tube 1a, two thin films of the electron emitting film are formed. The support member 4 and the two phosphor layer support members 5 are inserted in series in the thin tube 1a. The support member 5 for the phosphor layer may have a length of 400 mm. Then, the first support member 4 and the second support member 4 of the electron emission film
It is arranged so that the joint with and is located in the non-discharge region 21. Further, it is desirable that the joint between the first support member 5 and the second support member 5 of the phosphor layer is also arranged so as to be located in the non-discharge region 21.

FIG. 5 is an explanatory view showing the state of the seams in the non-discharge region in the first embodiment. The seam between the first support member 4 and the second support member 4 of the electron emission film is abutted at the position of the non-discharge region 21, but the support members 4 of the electron emission film are heated and melted to bond them. Alternatively, they may be bonded using an adhesive such as low melting point glass. This connection is performed after forming the MgO film on the inner surface of the supporting member 4,
This is performed before inserting the support member 4 into the thin tube 1a. 20
When two support members 5 having a 0 mm phosphor layer are used, they may be connected in series by the same method.

The same applies to the case where the support member 6 for the electron emission film and the support member 7 for the phosphor layer of the second embodiment are arranged in the thin tube 1a, and two support members 6 for the electron emission film and two support members for the electron emission film are provided. The support member 7 for the phosphor layer is inserted in series in the thin tube 1a. At the time of this insertion, the support member 6 for the electron emission film
The phosphor layer support member 7 and the phosphor layer support member 7 are made to face each other and are inserted into the thin tube 1a. Since the support member 6 for the electron emission film has a boat shape, it may have a length of 400 mm. The same applies to the support member 7 of the phosphor layer.

Then, the electron emitting film is arranged so that the joint between the first supporting member 6 and the second supporting member 6 is located in the non-discharge region 21. Further, it is desirable that the joint between the first support member 7 and the second support member 7 of the phosphor layer is also arranged so as to be located in the non-discharge region 21.

FIG. 6 is an explanatory view showing the state of the seam in the non-discharge area in the second embodiment. The joint between the first supporting member 6 and the second supporting member 6 of the electron emission film is also abutted at the position of the non-discharge region 21, but welding,
Either adhesive may be used. This connection also applies to the support member 6
After the MgO film is formed in the concave portion, the supporting member 6 is inserted into the thin tube 1a. When two supporting members 7 having a phosphor layer of 200 mm are used, they may be connected in series by the same method.

Thus, the support member 4 for the electron emission film and the support member 5 for the phosphor layer of the first embodiment are provided in the thin tube 1a.
Alternatively, the support member 6 for the electron emission film and the support member 7 for the phosphor layer of the second embodiment are inserted and fixed to fix the thin tube 1a.
An electron emission film and a phosphor layer are arranged inside (in the discharge space).
Then, after exhausting the inside of the thin tube 1a, a discharge gas is enclosed in the thin tube 1a to seal both ends of the thin tube 1a.

At the time of this sealing, the support member for the electron emission film and the support member for the phosphor layer are chipped off together with the thin tube to seal the end portion of the thin tube, thereby forming a support member for the electron emission film. The support member for the phosphor layer can be fixed in the thin tube.

Since the thin tube is made of glass and is well compatible with the glass-made electron emission film supporting member and the phosphor layer supporting member, the electron emitting film supporting member and the phosphor layer supporting member are made at the time of sealing. Even if is melted and fixed together with the end portion of the thin tube, leakage of the thin tube is unlikely to occur.

As described above, the gas discharge tube is formed by the assembly of the thin tube, the electron emission film supporting member, and the phosphor layer supporting member. Since the gas discharge tube can be used, the yield of the entire gas discharge tube can be improved.

FIG. 7 is an explanatory view showing the thickness of the dielectric layer. Here, an example of the second embodiment will be described. In the display device shown in FIG. 4, surface discharge is generated between the display electrode pair 2 during display. Therefore, the dielectric layer on the electrode, that is, the thin tube 1
The total thickness of the thickness Ht of a and the thickness St of the support member 6 of the electron emission film affects the discharge start voltage between the display electrode pair 2.

FIG. 8 is a graph showing the relationship between the thickness (μm) of the dielectric layer and the discharge start voltage (V). The thickness of the dielectric layer is one of the parameters that determines the firing voltage,
The discharge starting voltage also changes depending on the composition and pressure of the discharge gas sealed inside the thin tube 1a. For this reason, for example, when the dielectric layer is composed of a thin tube and a supporting member for an electron emission film, and borosilicate glass is used for these, the surface discharge gap between the display electrode pair 2 is set to 200 μm, and the discharge gas to be sealed is N 2
e (96%) + Xe (4%) and the enclosed gas pressure is 350
Assuming Torr, the relationship between the thickness of the dielectric layer and the firing voltage is as shown in this graph.

Although not shown in the graph, for example, when the thickness of the dielectric layer is 300 μm or more, the discharge start voltage exceeds 1000 V, and the cost of the voltage application driver and the withstand voltage of the electronic circuit are taken into consideration. Then it is not practical.

Therefore, from the limitation of the discharge start voltage,
Total thickness of the thin tube and the supporting member of the electron emission film (Ht + S
It is desirable that t) be 300 μm or less. Also,
The total thickness of the thin tube 1a and the electron emission film supporting member 6 (H
t + St) is at least 20 μm from the viewpoint of mechanical strength.
Degree is necessary. Therefore, the total thickness (Ht + St) of the thin tube 1a and the support member 6 of the electron emission film is 20 to 20.
It is desirable to set it in the range of about 300 μm. this is,
The same applies to the gas discharge tube of the first embodiment.

In the gas discharge tubes of Embodiments 1 and 2, the total thickness (Ht) of the thin tube and the supporting member of the electron emission film is
+ St) is about 70 to 120 μm. With this thickness, the discharge start voltage is about 400 to 500 V, which can be a practical discharge start voltage.

In this way, the electron emission film is formed on the supporting member outside the thin tube, and the supporting member is inserted into the thin tube and placed in the discharge space. Thereby, when a cylindrical support member is used, the length of the support member can be shortened and the coating liquid for forming the electron emission film can be uniformly applied to the inside of the support member. Oxygen deficiency during firing can be eliminated. When a boat-shaped support member is used, the coating liquid for forming the electron emission film can be easily and uniformly applied, and oxygen deficiency at the time of baking the coating film can be eliminated. Moreover, the electron emission film can be formed by another method such as vapor deposition. Therefore, a good electron emission film can be easily formed.

[0060]

According to the present invention, since the electron emission film is formed on the support member independent of the thin tube, the electron emission film is formed on the support member outside the gas discharge tube, and the support member is formed. It can be inserted inside the capillary and placed in the discharge space. Therefore, it becomes possible to uniformly apply the coating liquid for forming the electron emission film. In addition, baking of the coating film becomes easy. This makes it possible to easily form a good electron emission film.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of a display device using a gas discharge tube of the present invention.

FIG. 2 is an explanatory diagram showing the configuration of Embodiment 1 of the gas discharge tube.

FIG. 3 is an explanatory diagram showing a configuration of a second embodiment of the gas discharge tube.

FIG. 4 is an explanatory diagram showing an example in which a display device is configured using the gas discharge tube of the present invention.

FIG. 5 is an explanatory diagram showing a state of a seam in a non-discharge region in the first embodiment.

FIG. 6 is an explanatory diagram showing a state of a seam in a non-discharge region in the second embodiment.

FIG. 7 is an explanatory diagram showing the thickness of a dielectric layer.

FIG. 8 is a graph showing the relationship between the thickness of the dielectric layer and the discharge firing voltage.

[Explanation of symbols]

1 gas discharge tube 1a thin tube 2 display electrode pairs 2a Bus electrode 2b transparent electrode 3 signal electrodes 4,6 Electron emission film support member 4a, 6a electron emission film 5,7 Support member for phosphor layer 5a, 7a Phosphor layer 21 Non-discharge area 31 Front side substrate 32 back side substrate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01J 61/92 H01J 61/92 J (72) Inventor Manabu Ishimoto 4-chome Kamiodachu, Nakahara-ku, Kanagawa No. 1 in Fujitsu Limited (72) Inventor Kenji Awamoto 4-1-1 Kamiotanaka, Nakahara-ku, Kawasaki-shi, Kanagawa No. 1 In Fujitsu Limited (72) Inventor Shinoda 4-chome, Ueda-anaka, Nakahara-ku, Kanagawa No. 1 No. 1 in Fujitsu Limited F-term (reference) 5C039 EA11 JJ04 5C040 FA01 FA04 GB04 GE07 GF11 KB22 MA17 5C043 AA13 CC08 CD01 DD27 EB18 5C094 AA03 BA31 CA19 CA24 EA05 FB02 FB16 HA08

Claims (7)

[Claims] 1. In a gas discharge tube having an electron emission film inside a thin tube forming a discharge space, the electron emission film is formed on a support member independent of the thin tube, and the support member is inserted inside the thin tube. And a gas discharge tube arranged in the discharge space. 2. The gas discharge tube according to claim 1, wherein the support member is composed of a plurality of tubular members shorter than the narrow tube. 3. A phosphor layer formed on a support member independent of the capillaries, wherein the support member for the phosphor layer is inserted into the cylindrical support member of the electron emission film to form a discharge space. The gas discharge tube according to claim 2, which is arranged. 4. The gas discharge tube according to claim 1, wherein the support member is a semi-cylindrical member obtained by dividing the cylinder in the longitudinal direction. 5. A phosphor layer formed on a supporting member independent of the thin tube is further provided, and the supporting member of the phosphor layer is a semi-cylindrical member obtained by dividing a cylinder in a longitudinal direction, each of which has a semi-cylindrical shape. The support member for the electron emission film and the support member for the phosphor layer are opposed to each other so as to form a tubular shape, are inserted into the thin tube, and are arranged in the discharge space.
The described gas discharge tube. 6. The total of the thickness of the thin tube and the thickness of the support member is 20 to 300 μm.
Alternatively, the gas discharge tube according to item 4. 7. A plurality of gas discharge tubes according to claim 1 are arranged side by side on a support substrate, and the gas discharge tube installation surface of the support substrate is provided outside the gas discharge tubes. A display device comprising a plurality of signal electrodes which are in contact with a wall surface and extend in the longitudinal direction thereof, and which are provided in contact with an outer wall surface on the front surface side of the gas discharge tube so as to cross the gas discharge tubes.