JP2002075193A - Plasma display panel and apparatus for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly productive apparatus for manufacturing a plasma display panel, having a high discharge stability and which does not have blue- color deterioration. SOLUTION: Panels are heated and sealed sequentially, while they are made to move through a sealing furnace. The sealing furnace has, within its heating pathway, a chamber equipped with a vacuum pumping means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP) using gas discharge light emission for use in a color television receiver or display for displaying characters or images, and an apparatus for manufacturing the same.

[0002]

2. Description of the Related Art A conventional plasma display panel will be described below with reference to the drawings. FIG. 8 is a cross-sectional view schematically showing an alternating current (AC) type plasma display panel.

In FIG. 8, reference numeral 51 denotes a front glass substrate on which a display electrode 52 is formed. Further, the display electrode 52 is formed of the dielectric glass layer 5.
3 and a magnesium oxide (MgO) dielectric protection layer 54.

Reference numeral 55 denotes a rear glass substrate. On the rear glass substrate 55, address electrodes 56, partition walls 57, and phosphor layers (60 to 62) are provided.
Reference numeral 9 denotes a discharge space for filling a discharge gas. The phosphor layer has red 60, green 61, and blue 62 for color display.
Are arranged in order. Each of the phosphor layers (60 to 62) emits and emits light by vacuum ultraviolet light (wavelength: 147 nm) having a short wavelength generated by discharge.

The following materials are generally used as the phosphor constituting the phosphor layers 60 to 62.

“Blue phosphor”: BaMgAl ₁₀ O ₁₇ : Eu “Green phosphor”: Zn ₂ SiO ₄ : Mn or BaAl ₁₂
O _19: Mn "red phosphor": Y ₂ O _3: Eu or (YxGd1-
x) BO ₃ : Eu Each color phosphor can be produced as follows.

Blue phosphor (BaMgAl ₁₀ O ₁₇ : Eu)
First, barium carbonate (BaCO ₃ ), magnesium carbonate (MgCO ₃ ), aluminum oxide (α-Al ₂ O ₃ )
Is blended so that the atomic ratio of Ba, Mg, and Al is 1: 1: 1: 10. Next, a predetermined amount of europium oxide (Eu ₂ O ₃ ) is added to the mixture.

Then, an appropriate amount of flux (AlF_Two, B
aCl_Two) Together with a ball mill, and
At 650 ° C. for a predetermined time (for example, 0.5 hour), in a reducing atmosphere
Ki (H _Two, N_TwoIt is obtained by firing in the middle.

The red phosphor (Y ₂ O ₃ : Eu) is composed of yttrium hydroxide Y ₂ (OH) ₃ and boric acid (H ₃ BO ₃ ) as raw materials.
And an atomic ratio of Y and B of 1: 1. next,
A predetermined amount of europium oxide (Eu ₂
O ₃ ) is added, mixed with a suitable amount of flux in a ball mill, and fired in air at 1200 ° C. to 1450 ° C. for a predetermined time (for example, 1 hour).

The green phosphor (Zn ₂ SiO ₄ : Mn) is prepared by mixing zinc oxide (ZnO) and silicon oxide (SiO ₂ ) as raw materials so that the atomic ratio of Zn to Si is 2: 1. Next, a predetermined amount of manganese oxide (Mn ₂ O ₃ ) was added to the mixture, and the mixture was mixed by a ball mill.
C. for a predetermined time (for example, 0.5 hour).

[0011] The phosphor particles produced by the above method are crushed and sieved to obtain a phosphor material having a predetermined particle size distribution.

Hereinafter, a conventional PDP manufacturing method will be described.

An address electrode made of silver is formed on a rear glass substrate, and a visible light reflecting layer made of dielectric glass and a glass partition are formed on the address electrode at a predetermined pitch.

A phosphor layer is formed by disposing a phosphor paste of each color including a red phosphor, a green phosphor, and a blue phosphor in each space sandwiched by these partition walls, and after forming, a phosphor layer is formed at 500 ° C. The phosphor layer is baked to a degree to remove resin components and the like in the paste (phosphor baking step).

After firing the phosphor, a low-melting glass paste is applied around the back plate as a sealing material for sealing with the front plate,
In order to remove the resin component and the like in the low melting point glass paste, it is calcined at about 350 ° C. (low melting point glass paste calcining step).

Thereafter, the front plate on which the display electrode, the dielectric glass layer and the protective layer are sequentially formed, and the rear plate are arranged so that the display electrode and the address electrode are orthogonal to each other with the partition wall interposed therebetween, and fired at about 450 ° C. The surroundings are sealed with low melting point glass (sealing step).

Thereafter, the inside of the panel is evacuated while being heated to about 350 ° C. (evacuation step), and after completion, a discharge gas is introduced at a predetermined pressure.

[0018]

In the conventional method of manufacturing a plasma display panel, there are several steps that require substrate heating as described above.

However, in these heating steps, there is a problem that the phosphor used is thermally deteriorated, and particularly in the sealing step, the blue phosphor is greatly deteriorated. This is BaMgAl ₁₀ O ₁₇ used as a blue phosphor:
It is considered that Eu is thermally degraded in the sealing step, causing a decrease in emission intensity and a decrease in emission chromaticity.

Further, the impurity gas such as H ₂ O and CO ₂ remaining inside panel to the exhaust process, if it can not sufficiently exhausted by the exhaust process, there is a problem that deteriorates the discharge characteristics.

In order to solve this problem, a drying gas is introduced into the panel during sealing to prevent blue deterioration (Japanese Patent Application No. 11-168995), and an impurity gas remaining in the panel before the exhaust process is removed. A method of reducing sealing exhaust is considered (Japanese Patent Application No. 4-33837).

However, in these methods, in order to connect a device for introducing or exhausting gas into the panel to the inside of the panel, a continuous heating furnace for heating while moving the panel is used to improve productivity. Production was performed using a batch-type heating furnace.

As a method for solving this problem, there has been proposed a device in which a panel is installed on a cart having a vacuum exhaust device built therein and the cart is moved in a continuous heating furnace (Elect).
Tronic Journal June 1999 p9
0), however, there is a problem that the apparatus becomes more expensive as the number of carts increases.

In view of the above problems, the present invention has high productivity, hardly causes thermal degradation of the phosphor, and has a relatively high efficiency by reducing impurity gas in the process up to the exhaust process. It is an object of the present invention to provide a manufacturing apparatus for manufacturing a plasma display panel which operates at luminous efficiency, has a high color temperature, and has good color reproducibility, at a relatively low cost.

[0025]

In order to achieve the above object, the present invention provides an apparatus for manufacturing a plasma display panel, wherein a phosphor layer is formed on at least one side and a sealing layer is formed on at least one side. A face plate and a back plate are overlapped, and while the both substrates are moved, the sealing plate is continuously heated to a sealing temperature equal to or higher than a temperature (softening point) at which the sealing sealing material softens, and the front plate and the back plate are moved. The manufacturing apparatus for a plasma display panel that seals a vacuum chamber has a chamber provided with a vacuum exhaust means at least in a part of a continuous heating path.

In the above configuration, it is preferable that at least a part of the continuous heating path has a chamber provided with a gas introducing means.

Also, the front plate and the back plate, each having at least one phosphor layer formed thereon and at least one sealing seal material layer formed thereon, are superimposed, and the sealing is performed while moving the superposed substrates. A plasma display panel manufacturing apparatus for continuously heating to a sealing temperature equal to or higher than a temperature at which a sealing material softens (softening point) and sealing the front plate and the back plate, and at least a part of a continuous heating path. And means for exhausting gas from an internal space formed between the two substrates.

Further, a front plate and a back plate each having a phosphor layer formed on at least one side thereof and a sealing material layer formed on at least one side thereof are superimposed, and the sealing is performed while moving the superposed substrates. A plasma display panel manufacturing apparatus for continuously heating to a sealing temperature equal to or higher than a temperature at which a sealing material softens (softening point) and sealing the front plate and the back plate, and at least a part of a continuous heating path. And a means for introducing a gas into an internal space formed between the two substrates.

In the above structure, it is preferable that a means for differentially exhausting an internal space formed between the two substrates is provided at least in a part of the continuous heating path.

Preferably, at least a part of the continuous heating path is provided with means for connecting a gas introducing device or a gas exhaust device to a glass tube formed on either the front plate or the back plate.

Further, there is provided means for connecting a gas exhaust device to a first glass tube provided on the front plate or the rear plate,
It is preferable that a means for introducing gas is provided near the second glass tube provided on the front plate or the rear plate.

Further, it is preferable that a means for heating and sealing the glass tube formed on either the front plate or the back plate is provided.

[0033]

Embodiment 1 Hereinafter, a method for manufacturing a plasma display panel according to Embodiment 1 of the present invention will be described. FIG. 3 is a sectional view schematically showing an AC surface discharge type plasma display panel according to one embodiment of the present invention. Although only one cell is shown in FIG. 3, a PDP is configured by arranging a large number of cells that emit red, green, and blue light.

This PDP comprises a display electrode 22, a dielectric glass layer 23, a protective layer (MgO) 2 on a front glass substrate 21.
4 and a back plate on which an address electrode 26, a visible light reflection layer 27, a partition wall 28 and a phosphor layer 29 are disposed on a back glass substrate 25, and formed between the front plate and the back plate. A discharge gas is sealed in a discharge space to be discharged.

As the composition of the phosphor material constituting the phosphor layer, those generally used for the phosphor layer of PDP can be used. Specific examples thereof include “blue phosphor”: BaMgAl ₁₀ O ₁₇ : Eu “green phosphor”: Zn ₂ SiO ₄ : Mn “red phosphor”: (Y, Gd) BO ₃ : Eu. .

FIG. 4 shows the blue phosphor (BaMgA) used.
l ₁₀ O ₁₇ : Eu) in air at a peak temperature of 450 ° C.
The measurement results of the relative light emission intensity water vapor partial pressure dependence when the water vapor partial pressure is changed in the case of baking for 20 minutes are shown. The relative emission intensity is set to 100 as the emission intensity of the blue phosphor before firing.

When the partial pressure of water vapor was around 0 Torr (Pa), no thermal degradation of the light emission intensity due to heating was observed, and the relative light emission intensity became weaker as the partial pressure of water vapor increased. That is, it has been found that by reducing the partial pressure of water vapor in the atmosphere, it is possible to prevent thermal deterioration due to heating of the blue phosphor (BaMgAl ₁₀ O ₁₇ : Eu).

In an actual PDP manufacturing process, deterioration generated in a sealing step in which water vapor generated from members is trapped inside the panel and the partial pressure of water vapor increases becomes large.

On the other hand, it was also confirmed that the luminescent intensity of the phosphor deteriorated by the steam heating was recovered by reheating in a dry atmosphere.

That is, in order to manufacture a panel with less deterioration of the luminous intensity of the phosphor, it is necessary to keep the drying gas flowing in the panel during sealing, and also to dry the panel only in a relatively high temperature portion during sealing. It has been found that the phosphor which has deteriorated so far can be recovered and the effect can be obtained only by flowing the gas.

Hereinafter, each member (especially M
A sealing furnace and a sealing step in the present embodiment for eliminating the influence of impurity gas containing water vapor released from gO) will be described.

FIG. 1 shows a sealing furnace of the present embodiment and a temperature profile thereof. The sealing furnace comprises a plurality of heating chambers 1,
It is divided into a heating zone, a sealing zone, and a cooling zone. The panel is transported in each heating chamber 1 by rollers 2. The panel 3 is stopped in each heating chamber for a predetermined time, and is sequentially heated by proceeding to the next heating chamber. At the rear end of the sealing zone, a chamber 5 that can be evacuated and separated by a vacuum valve 4 at the front and rear is installed. The chamber 5 has a vacuum exhaust device 6
And the gas introduction device 7 are connected. Gas heated to a predetermined temperature can be introduced into the chamber 5 from the gas introduction device 7.

Each heating chamber other than the chamber 5 of the sealing furnace is heated in the atmosphere.

FIG. 2 shows a panel in which the front plate 8 and the back plate 9 are bonded together before sealing. A sealing material 10 for sealing is provided between the front plate 8 and the back plate 9, and a glass tube 11 is formed on the back plate 9. The glass tube is also provided with a sealing material 10 for sealing. In this embodiment, a low-melting glass is used as a sealing material for sealing.

The panel was sealed by heating it to a temperature equal to or higher than the softening point of the low-melting glass according to the temperature profile of FIG.

In this sealing step, after the panel was conveyed into the chamber 5 located at the end of the sealing zone, the vacuum valve 4 was closed, and the inside of the chamber 5 was evacuated by the evacuation device 6. At the time of this exhaust, the gas in the space inside the panel is also exhausted through the glass tube 11. Thereafter, a high-temperature dry gas was introduced into the chamber 5 by the gas introducing device 7, and the inside of the panel was also filled with the dry gas. Thereafter, the vacuum valve 4 was opened, the panel was transported to the cooling zone, and the sealing was completed.

In this step, since the panel is heated in the atmosphere until it is transported to the chamber, the phosphor inside the panel is deteriorated by water vapor generated from the panel member. However, the deteriorated phosphor is recovered by removing the water vapor from the panel and introducing the drying gas in the chamber. After leaving the chamber, it becomes a cooling zone, and the impurity gas generated from the panel member is reduced, so that the residual impurity gas inside the panel can be reduced, and the reaction between the phosphor and the impurity gas is also small. As a result, the phosphor is not significantly deteriorated. Therefore, a sufficient effect can be obtained by providing a chamber configuration capable of evacuating only a part of the sealing furnace without using a chamber configuration capable of evacuating the entire sealing furnace, and a relatively inexpensive apparatus can be obtained.

In this sealing furnace, unlike the batch furnace, the panels can be continuously carried in, so that the productivity is also improved.

As the water vapor partial pressure of the drying gas, the lower the water vapor partial pressure is, the more the deterioration of the blue phosphor is suppressed. However, as compared with the conventional sealing process, it is 10 Torr (1330 Pa).
A remarkable effect appeared from the vicinity.

In addition, BaM which is often used in PDPs
gAl ₁₀ O ₁₇ : Eu, Zn ₂ SiO ₄ : Mn or (Y, G
d) When an oxide-based phosphor such as BO ₃ : Eu is heated in an oxygen-free atmosphere, some oxygen vacancies are formed and the luminous efficiency may be reduced.

Therefore, it is desirable that the dry gas used in the main sealing process contains at least oxygen.

In this embodiment, the vacuum evacuation and gas introduction are performed in one chamber. However, in order to further increase the productivity, a plurality of chambers are successively installed via a vacuum valve, and the inside of each chamber is set. It is also possible to share the vacuum evacuation and the gas introduction.

Although the evacuation and gas introduction are most effective at the sealing peak temperature, some effects can be obtained even at other temperatures.

Furthermore, if another chamber is installed in the cooling zone, and vacuum evacuation and discharge gas introduction are performed in that chamber, the sealing step and the evacuation step can be performed using the present manufacturing apparatus.

In this case, after the discharge gas is introduced, it is necessary to melt and seal the glass tube with an electric heater or the like in a chamber in a discharge gas atmosphere.

The number of heating chambers is not fixed in the present embodiment, but is preferably changed according to the sealing temperature profile and the panel loading speed.

Further, at the time of driving the PDP, as shown in FIG.
And the scanning electrode 101 of the cell to be turned on.
After applying an address discharge between the display electrodes 101a and 101b, a sustain voltage is applied by applying a pulse voltage between the display electrodes 101a and 101b. Then, the cell emits ultraviolet light in accordance with the discharge, and is converted into visible light by the phosphor layer.
An image is displayed by lighting the cell in this manner.

Embodiment 2 Hereinafter, a method for manufacturing a plasma display panel according to Embodiment 1 of the present invention will be described. FIG. 6 shows a sealing furnace of the present embodiment and its temperature profile. The sealing furnace includes a plurality of heating chambers 30 and is divided into a heating zone, a sealing zone, and a cooling zone. The panel 31 is transported in each heating chamber 30 by the rollers 32. The panel 31 is stopped in each heating chamber for a predetermined time, and is sequentially heated by proceeding to the next heating chamber. At the rear end of the sealing zone, connecting portions 37 and 38 for connecting the glass tubes 33 and 34 of the panel 31 to the gas exhaust device 35 and the gas introducing device 36 are provided, and the connecting portions 37 and 38 are movable up and down. Mechanism. A gas heated to a predetermined temperature can be introduced into the panel from the gas introduction device 36. The connection parts 37 and 38 have a rubber ring and a cooling part for water-cooling the rubber ring in order to have a sealing property between the pipe and the glass tube.

In each heating chamber of the sealing furnace, the panel is heated in the atmosphere.

FIG. 7 shows the state of the panel in which the front plate 39 and the back plate 40 are adhered to each other in the last heating chamber of the sealing zone. A sealing material 41 for sealing is provided between the front plate 39 and the back plate 40, and an exhaust device 35 is provided on the back plate 40.
Glass tube 33 and gas introduction device 3 connected to
A second glass tube 34 connected to 6 is formed.
In this embodiment, a low-melting glass is used as a sealing material for sealing.

The panel was sealed by heating to a temperature equal to or higher than the softening point of the low-melting glass according to the temperature profile of FIG.

In this sealing step, after the panel has been transported to the heating chamber at the end of the sealing zone, the connecting portions 37 and 3
8 was lowered and connected to glass tubes 33 and 34. After connection, gas exhaust and high-temperature dry gas were introduced into the panel.
Thereafter, the connecting portions 37 and 38 were raised, and the panel was conveyed to the cooling zone to complete the sealing.

In this step, the panel is heated in the atmosphere until it is conveyed to the heating chamber at the end of the sealing zone. to degrade. However, the above operation removes the water vapor from the panel and introduces a drying gas, so that the deteriorated phosphor is recovered. After entering the cooling zone, the impurity gas generated from the panel member is reduced, so that the residual impurity gas inside the panel can be reduced.Furthermore, since the reaction between the phosphor and the impurity gas is also reduced, No significant degradation of the phosphor occurs.

Further, in this sealing furnace, unlike the batch furnace, since the panels can be continuously carried in, the productivity is also improved.

As the water vapor partial pressure of the drying gas, the lower the water vapor partial pressure is, the more the deterioration of the blue phosphor is suppressed. However, as compared with the conventional sealing process, it is 10 Torr (1330 Pa).
A remarkable effect appeared from the vicinity.

In addition, BaM which is often used in PDPs
gAl ₁₀ O ₁₇ : Eu, Zn ₂ SiO ₄ : Mn or (Y, G
d) When an oxide-based phosphor such as BO ₃ : Eu is heated in an oxygen-free atmosphere, some oxygen vacancies are formed and the luminous efficiency may be reduced.

Therefore, it is desirable that the dry gas used in the main sealing process contains at least oxygen.

In this embodiment, gas exhaust and gas introduction are performed only in one heating chamber. However, by providing a similar connecting portion in each heating chamber, it is possible to reliably remove impurity gas from the inside of the panel. It becomes possible.

The effect of gas exhaustion and gas introduction at least at the sealing peak temperature is great, but some effects can be obtained even at other temperatures.

The connecting portion is connected to the gas exhaust side (connecting portion 37).
In this regard, the introduction of the drying gas was fixed in the vicinity of the second glass tube 34 and the drying gas was introduced only in the vicinity of the second glass tube 34, and a sufficient effect was obtained. .

Further, the connection portion is connected to the gas exhaust side (connection portion 3).
By only 7), a certain effect was obtained only by introducing the furnace atmosphere gas from the second glass tube 34.

The connecting portion is connected to the gas introduction side (connecting portion 38).
In this case, a sufficient effect was obtained only by introducing the drying gas into the panel from the second glass tube 34 and discharging the gas from the first glass tube 33 into the furnace.

Further, the drying gas introduction side (connection portion 38) and the gas exhaust side (connection portion 37) are connected to each glass tube, and the inside of the panel is differentially evacuated, whereby the sealing can be performed stably. It becomes possible. This is because the front panel and the rear panel are pressed by the pressure difference between the inside and outside of the panel by making the inside of the panel lower than the atmospheric pressure by the differential exhaust.

Further, a connecting portion 37 and a connecting portion 38 are separately provided after the sealing zone, and the inside of the sealing completed panel is evacuated, and a discharge gas such as a rare gas is introduced, whereby the sealing step and the evacuation step are performed. Can be performed continuously. In this case, after the discharge gas is introduced, it is necessary to melt and seal the glass tube with an electric heater or the like in a chamber in a discharge gas atmosphere. For example, by adopting a configuration in which ring-shaped electric heaters are provided at the connection portions 37 and 38, the glass tube can be melted and sealed by heating from around the glass tube after the discharge gas is introduced.

[0075]

EXAMPLES In order to verify the effects of the present invention, a PDP was manufactured based on the above embodiment and compared with a conventional PDP. The panels are 42 "size.

The panel of this example was manufactured using the apparatus of Embodiments 1 and 2, and had a softening point of 3 as a sealing material.
A 90 ° C. glass frit was used. The panel was stopped in each heating chamber for 15 minutes, and exhaust / gas introduction of the chamber or exhaust / gas introduction inside the panel was performed in the latter half of the sealing zone (450 ° C.).

In the panel of the second embodiment, the flow rate of the dry gas was set to 300 × 10 ⁻⁶ m ³ / min.

Note that dry air was used as a dry gas.

The PDP according to the comparative example is a panel sealed without flowing dry gas into the panel as in the conventional sealing step.

In each of the above PDPs, the sealing zone was composed of two heating chambers, and had a temperature profile in which the peak temperature was maintained at 450 ° C. for 30 minutes. The panel configuration is the same, the phosphor film thickness is 30 μm, and the discharge gas is Ne (95%).
%)-Xe (5%) at 500 Torr (66.5 kP
Enclosed in a).

The emission characteristics evaluated by lighting the panel include the emission intensity (luminance divided by the chromaticity coordinate y), the chromaticity coordinate y, the peak wavelength of the emission spectrum, and the emission intensity when only the blue cell is lit. The color temperature of white display (without color temperature correction) when all of blue, red, and green were turned on under the same power condition was measured.

As a result of the panel comparison, in the panel of this example, the blue emission intensity increased by 30% in both the panels of the first and second embodiments as compared with the comparative example.
The chromaticity coordinate y of blue was also reduced to 0.06 (the comparative example was 0.09). Along with that, the white color temperature also increased to 11000K (Comparative Example 5800K). Furthermore, impurities in the panel were eliminated during sealing, and the discharge characteristics and uniformity in the panel were improved.

Although not shown in the examples, with respect to the water vapor partial pressure of the dry air flowing into the sealing device, the light emission characteristics improved as the water vapor partial pressure decreased.

In the above embodiment, the surface discharge type PDP is exemplified. However, the present invention can be applied to all PDPs which require a heat process for sealing, such as a counter discharge type PDP.

[0085]

As described above, according to the present invention, it is possible to suppress the deterioration of the light emission characteristics of the phosphor which has conventionally occurred in the sealing step by using a relatively high-productivity and relatively inexpensive apparatus.
As a result, a plasma display panel with high emission intensity and emission efficiency and a wide color reproduction range can be realized.

[Brief description of the drawings]

FIG. 1 is a diagram showing a sealing furnace and a temperature profile thereof according to an embodiment of the present invention.

FIG. 2 is a diagram showing a panel configuration in which a front plate and a back plate are adhered to each other at the time of sealing according to the embodiment of the present invention;

FIG. 3 is a schematic sectional view of an AC surface discharge type plasma display panel according to the present embodiment.

FIG. 4 is a diagram showing the dependence of the relative emission intensity on the partial pressure of water vapor when a blue phosphor is fired.

FIG. 5 illustrates a PDP in which a driving circuit is connected to the PDP of the present embodiment.
Diagram showing DP display device

FIG. 6 is a view showing a sealing furnace and a temperature profile thereof according to the embodiment of the present invention.

FIG. 7 is a view showing a panel in which a front plate and a back plate are adhered to each other in a sealing zone according to the embodiment of the present invention and a device configuration;

FIG. 8 is a schematic sectional view of a conventional AC surface discharge type plasma display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating room 2 Roller 3 Panel 4 Vacuum valve 5 Chamber 6 Vacuum exhaust device 7 Gas introduction device

Claims (21)

[Claims] 1. A front plate and a back plate each having a phosphor layer formed on at least one side thereof and a sealing material layer formed on at least one side thereof are overlapped with each other, and the sealing is performed while moving the both substrates. A plasma display panel manufacturing apparatus for continuously heating to a sealing temperature equal to or higher than a temperature at which a sealing material softens (softening point) to seal the front plate and the back plate, and at least a part of a continuous heating path. An apparatus for manufacturing a plasma display panel, further comprising a chamber provided with a vacuum exhaust means. 2. The plasma display panel manufacturing apparatus according to claim 1, further comprising a chamber provided with a gas introduction means at least in a part of a continuous heating path. 3. The plasma display panel manufacturing apparatus according to claim 1, further comprising a chamber provided with a vacuum exhaust unit and a gas introducing unit at least in a part of a continuous heating path. 4. The plasma display panel manufacturing apparatus according to claim 1, wherein a chamber provided with a vacuum evacuation unit or a gas introduction unit is provided at a heating peak temperature portion. 5. A front plate and a back plate each having a phosphor layer formed on at least one of them and a sealing material layer formed on at least one of them are overlapped with each other, and said sealing is performed while moving both of said overlapped substrates. A plasma display panel manufacturing apparatus for continuously heating to a sealing temperature equal to or higher than a temperature at which a sealing material softens (softening point) to seal the front plate and the back plate, and at least a part of a continuous heating path. And a means for exhausting gas from an internal space formed between the two substrates. 6. A front plate and a back plate each having a phosphor layer formed on at least one side and a sealing material layer formed on at least one side, and the sealing is performed while moving the both substrates. A plasma display panel manufacturing apparatus for continuously heating to a sealing temperature equal to or higher than a temperature at which a sealing material softens (softening point) to seal the front plate and the back plate, and at least a part of a continuous heating path. And a means for introducing a gas into an internal space formed between the two substrates. 7. At least part of a continuous heating path,
7. The plasma display panel manufacturing apparatus according to claim 5, further comprising: means for introducing a gas into the internal space formed between the two substrates and means for exhausting the gas. 8. At least part of a continuous heating path,
8. The apparatus for manufacturing a plasma display panel according to claim 7, further comprising means for differentially exhausting an internal space formed between said two substrates. 9. The method according to claim 5, wherein a means for introducing a gas into the internal space formed between the two substrates or a means for exhausting the gas is provided at a heating peak temperature portion. An apparatus for manufacturing a plasma display panel according to any one of the above. 10. At least a part of a continuous heating path is provided with means for connecting a gas introducing device or a gas exhaust device to a glass tube formed on either the front plate or the back plate. An apparatus for manufacturing a plasma display panel according to any one of claims 5 to 9. 11. A device for connecting a gas exhaust device to a first glass tube provided on a front plate or a back plate, wherein a gas is provided near a second glass tube provided on the front plate or the back plate. The apparatus for manufacturing a plasma display panel according to claim 10, further comprising a unit for introducing a plasma display panel. 12. The plasma display panel according to claim 1, wherein the gas introduced into the chamber or the gas introduced into the internal space formed between the two substrates is a dry gas. Manufacturing equipment. 13. The method according to claim 12, wherein the dry gas contains at least oxygen. 14. The method according to claim 12, wherein the dry gas comprises dry air. 15. The method of manufacturing a plasma display panel according to claim 12, wherein a partial pressure of water vapor of the drying gas is 133 Pa or less. 16. The plasma display panel according to claim 1, wherein the gas introduced into the chamber or the gas introduced into the internal space formed between the two substrates is a discharge gas. Manufacturing equipment. 17. The plasma display panel manufacturing apparatus according to claim 16, wherein the discharge gas is a rare gas or a mixed gas containing a rare gas. 18. The apparatus for manufacturing a plasma display panel according to claim 1, further comprising means for heating and sealing a glass tube formed on either the front plate or the back plate. . 19. A plasma display panel in which an electrode and phosphor layers of a plurality of colors are arranged between a pair of parallelly arranged plates, and a gas medium is sealed therein.
A plasma display panel manufactured by the manufacturing apparatus according to claim 1. 20. CI when only a blue cell emits light
20. The plasma display panel according to claim 19, wherein the E chromaticity coordinate y is 0.07 or less. 21. A plasma display panel display device comprising a plasma display panel and a driving circuit for driving the plasma display panel, wherein the plasma display panel is provided.
0. The plasma display panel display device according to any one of items 1 to 5, wherein