JP2002134019A - Manufacturing method and manufacturing apparatus for plasma display panel and plasma display panel manufactured by using them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a plasma display panel(PDP), which exhausts impurity gases, which are evolved into a gas discharge space when an outer periphery sealing compound is heated, to the outer space of the PDP without the impurity gases remained in the gas discharge space, in a sealing step for the PDP. SOLUTION: The PDP is sealed in the condition that the pressure in the gas discharge space surrounded by a front substrate, a rear substrate, and the outer periphery sealing compound is higher than the pressure in the outer space of the PDP.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a plasma display panel, a method for manufacturing the same, and an apparatus for manufacturing the same.

[0002] Plasma display panels (PDPs)
) Is attracting attention as a display device replacing a cathode ray tube, and is expected to be used for large displays such as high-definition televisions.

[0003]

2. Description of the Related Art The structure of a general AC type PDP is shown in FIG. A group of display electrodes 101 and display scan electrodes 102 that are opposed to each other are formed on a glass substrate 103.
These electrodes include a transparent electrode and a bus electrode for preventing a voltage drop due to the electric resistance of the transparent electrode. These display electrodes 101 and display scan electrodes 102 are grouped in the dielectric layer 10.
4 and further with an MgO protective film 105. On the other hand, a stripe-shaped address electrode 107 is formed on one glass substrate 106. The address electrode 107 is covered with a dielectric layer 108, and a rib 109 is formed adjacent to the address electrode 107. The rib 109 cuts off the influence on the adjacent cell at the time of address discharge,
It works to prevent light crosstalk. Next, red, blue, and green phosphors 110 are separately applied to the respective ribs so as to cover the address electrodes 107. The glass substrate 103 and the glass substrate 106 are combined while maintaining the display electrode gap, and the periphery is sealed with a glass frit (sealing step). Thereafter, the inside of the panel is evacuated while heating through a discharge gas vent provided in the glass substrate (evacuation step), and after completion, a discharge gas mainly composed of an inert gas such as Ne is filled (gas filling step). The discharge gas vent is closed (sealing step).

[0004] In the conventional sealing step, the glass frit is melted in a gas discharge space of a PDP surrounded by two glass substrates and an outer peripheral sealing member without gas being taken in and out. Is maintained at a temperature higher than the temperature at which the glass frit softens, for a predetermined time, and then cooled to room temperature. As a result, the two glass substrates are sealed with the glass frit. That is, the pressure in the gas discharge space of the PDP surrounded by the two glass substrates and the glass frit and the PDP external space in which the PDP is installed are sealed at the same pressure.

[0005]

However, the pressure in the gas discharge space of the PDP surrounded by the two glass substrates and the glass frit and the space outside the PDP where the PDP is installed are sealed under the same pressure. When the deposition is performed, an impurity gas mainly composed of a hydrocarbon-based gas released when the glass frit is heated is mixed into the gas discharge space of the PDP. These impurity gases are supplied to the PDP during the exhaust process.
However, the residual impurity gas that is removed from the gas discharge space but not completely removed will deteriorate the discharge characteristics when the PDP is turned on. In particular, in order to cause the deterioration of the discharge characteristics in the initial stage of lighting of the PDP, as a countermeasure against this deterioration, the lighting is performed only for a predetermined period of time. In a place where the discharge characteristics are not affected even in the gas discharge space of the PDP.

As described above, the pressure and P in the gas discharge space of the PDP surrounded by the two glass substrates and the glass frit.
When sealing is performed under the same pressure with the PDP external space in which the DP is installed, and a large amount of impurity gas released when the glass frit is heated is mixed into the gas discharge space of the PDP, the discharge characteristics of the PDP become poor. Deterioration occurs, and as a countermeasure,
It is necessary to sufficiently perform the exhaust process to sufficiently remove the residual impurity gas in the gas discharge space of the PDP, and to sufficiently perform aging. In the PDP manufacturing process, particularly, the time required for the exhaust process and the aging process is reduced. Had the problem of making it longer.

In view of the above problems, the present invention discharges an impurity gas released when a peripheral sealing member is heated in a PDP sealing step without mixing the gas into a gas discharge space of the PDP to the outside of the PDP. It is an object of the present invention to provide a method of manufacturing a plasma display panel to be manufactured.

[0008]

In order to achieve the above object, a method of manufacturing a plasma display panel according to the present invention comprises forming a gas discharge space by a front substrate, a rear substrate and an outer peripheral sealing member, A method for manufacturing a plasma display panel having a plasma display panel sealing step of fusing and sealing a plasma display panel, wherein a pressure of a gas discharge space of the plasma display panel surrounded by a front substrate, a rear substrate, and an outer peripheral sealing member However, a means for sealing in a state higher than the pressure of the external space of the plasma display panel is used.

By using this means, in the PDP sealing step, a plasma for discharging an impurity gas released when the outer peripheral sealing member is heated to the outside of the PDP without mixing into the gas discharge space of the PDP. A method for manufacturing a display panel can be provided.

[0010]

FIG. 1 is a view schematically showing a configuration of a PDP manufacturing apparatus according to the present invention. Figure 5 shows PDP1
The glass substrate 103 and the glass substrate 106 on which the necessary components are formed are combined while maintaining a certain gap, and are fixed with a leaf spring (not shown). It is connected to the present manufacturing apparatus through a gas vent 2 provided on the side and a gas vent tube 3 connected to the gas vent 2. Here, a glass frit is used for the outer peripheral sealing member 4, and the outer peripheral portion of the PDP 1 is coated on the glass substrate 106 side in advance as shown in FIG.
And dried. The gas vent 2 is provided at a position other than the image display area 5 shown in FIG. As the gas vent tube 3, a cylindrical glass tube is used, and the gas vent 2 and the gas vent tube 3 are connected using a glass frit. The gas vent pipe 3 and the pipe 6 on the manufacturing apparatus side are connected using a connection jig 7, and an O-ring is embedded in the connection jig 7, though not shown, so that the gas vent pipe 3 and the pipe 6 can be sealed. ing. The pipe 6 is connected to a gas introduction system 8 for introducing a gas and an exhaust system 9 for evacuating via a gas introduction system valve 10 and an exhaust system valve 11. The PDP 1 is entirely covered with a heating device 12. The configuration of the PDP manufacturing apparatus according to the present invention has been described above.

[0011]

Next, an example according to the present embodiment after connection of the present apparatus will be described. When the apparatus is connected, the gas introduction valve 10 and the exhaust valve 11 are closed. First, the gas introduction system valve 10 is opened, and gas is introduced into the gas discharge space 13 surrounded by the two glass substrates of the PDP 1 and the outer peripheral sealing member 4. Nitrogen gas is used as the gas to be introduced, and the gas discharge space 1
Gas continued to flow through 3. The flow rate of the continuously flowing gas is 10 ccm to 500 ccm (10 × 1) using a mass flow controller (not shown) attached to the gas introduction system 8.
0 ^-6 m ³ / min to 5 × 10 ^-4 m ³ / min), and the pressure inside the gas discharge space 13 was set higher than the atmospheric pressure. At this time, the outer peripheral portion of the PDP 1 is connected to the outer peripheral sealing member 4 formed on the glass substrate 106 side and the glass substrate 10.
3 is in contact with, but has not yet been heated to the melting temperature, so there is a gap between the outer peripheral sealing member 4 and the glass substrate 103, and the pressure in the gas discharge space 13 is higher than the pressure in the outer space. To be higher, the gas discharge space 13 of the PDP 1
Nitrogen gas introduced into the PD
It will be in the state of flowing into the space outside P1. FIG. 3 shows an AA cross section of the outer peripheral sealing member in FIG. As shown in FIG. 3, when the outer peripheral sealing member 4 has an uneven shape,
It goes without saying that the gas easily flows from the gas discharge space 13 of the PDP 1 to the external space. In this state, the PDP 1 is heated using the heating device 12. FIG. 4 shows a temperature profile of the PDP 1 during the sealing step. When the temperature of the glass frit that is the material of the outer peripheral sealing member 4 exceeds the softening point, the outer peripheral sealing member 4 is melted,
The glass substrates and the outer peripheral sealing member 4 are hermetically sealed. At this time, if the pressure in the gas discharge space 13 surrounded by the two glass substrates of the PDP 1 and the outer peripheral sealing member 4 is too high, an air flow is formed in the gap between the outer peripheral sealing member 4 and the portion thereof. This pressure must be set to an appropriate value that is not too high, because it may remain as a hole without being sealed and cause a sealing error. By doing the above, P
When the DP1 is heated, the impurity gas released from the outer peripheral sealing member 4 is discharged to the outside of the PDP 1 along the gas flow without mixing into the gas discharge space 13 of the PDP 1. The heating of the PDP 1 is performed as shown in FIG.
After being maintained at a temperature equal to or higher than the softening point of the outer peripheral sealing member 4 of P1 for a certain period of time, it is cooled to room temperature. On the way, PDP
When the two glass substrates 1 and the outer peripheral sealing member 4 are sealed, the gas does not flow outside the PDP 1 and the pressure in the gas discharge space 13 of the PDP 1 may increase. The pressure is appropriately adjusted to a level slightly higher than the pressure of the external space of the PDP 1 through the valve.
Also, when the temperature of PDP 1 rises in the sealing process,
At the stage where it was confirmed from the change in the pressure of the gas discharge space 13 that the two glass substrates of the PDP 1 and the outer peripheral sealing member 4 were in close contact, the gas introduction system valve 10 was closed and the introduction of gas was stopped. After the temperature of the PDP 1 has been cooled to room temperature, the exhaust system valve 11 is opened, and the gas discharge space 13 of the PDP 1 is exhausted while using the heating device 12 again to exhaust the gas.
P1 is heated (exhaust step), and after completion, a discharge gas mainly composed of an inert gas such as Ne is filled (gas filling step), and the discharge gas vent pipe 3 is sealed using a burner.
By performing the (sealing step), a PDP was produced. Ne-Xe mixed gas is used as the discharge gas, and the discharge gas filling pressure is 100 to 760 Torr (13.3 to 101.08 k).
Pa). PDP fabricated using this method
Then, the impurity gas released when the outer peripheral sealing member is heated is discharged to the outside of the PDP without being mixed into the gas discharge space 13 of the PDP 1, thereby removing the impurity gas from the gas discharge space 13 of the PDP 1. It was confirmed that the time required for the evacuation process to be performed was shortened, and the time required for stabilizing the discharge characteristics in the aging process was shortened.

In this embodiment, nitrogen gas is used as the gas introduced during sealing, but the same effect can be obtained by using oxygen gas or a rare gas. The same effect can be obtained by using a dry gas such as dry air.

When the gas to be introduced is heated, the effect of releasing the impurity gas can be enhanced.

Further, the PDP 1 is positioned in the vacuum pumping apparatus on the same structure as that of the above embodiment, so that the external space of the PDP 1 is evacuated while the PDP 1 is evacuated.
When the gas is introduced into the gas discharge space 13 of FIG.
It becomes easier to flow into the external space of the PDP 1 through the outer peripheral portion of the DP 1, and the same effect can be obtained.

Although the gas vent for introducing gas is provided at one place in the present embodiment, the gas vent is not limited to this.

As described above, according to the present embodiment, by using this means, in the PDP sealing step, the impurity gas released when the outer peripheral sealing member is heated can be removed from the PDP.
And a method for manufacturing a plasma display panel that discharges the gas to the outside of the PDP without mixing into the gas discharge space.

[0017]

According to the present invention, in the PDP sealing step, the impurity gas released when the outer peripheral sealing member is heated is prevented from being mixed into the gas discharge space of the PDP.
It is possible to provide a method of manufacturing a plasma display panel that discharges the outside of P.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a PDP manufacturing apparatus according to the present invention.

FIG. 2 is a plan view of a PDP according to the present invention.

FIG. 3 is a sectional view of an outer peripheral sealing member according to the present invention.

FIG. 4 is a diagram showing a temperature profile of a sealing step according to the present invention.

FIG. 5 is a perspective view showing a PDP panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plasma display panel 2 Gas ventilation port 3 Gas ventilation pipe 4 Outer periphery sealing member 5 Image display area 6 Piping 7 Connection jig 8 Gas introduction system 9 Exhaust system 10 Gas introduction system valve 11 Exhaust system valve 12 Heating device 13 Gas discharge space 101 Display electrode 102 Display scan electrode 103 Glass substrate 104 Dielectric layer 105 MgO protective film 106 Glass substrate 107 Address electrode 108 Dielectric layer 109 Rib 110 Phosphor

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hideaki Yasui 1006 Kadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Inventor Hiroyuki Kado 1006 Odakadoma Kadoma, Osaka Pref. (72) Inventor Masafumi Okawa 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference) 5C012 AA09 BC03 5C040 FA01 GB03 GB14 HA01 HA04 MA20

Claims (12)

[Claims] 1. A method for manufacturing a plasma display panel comprising a plasma display panel sealing step of forming a gas discharge space by a front substrate, a rear substrate and an outer peripheral sealing member, melting and sealing the outer peripheral sealing member. The plasma is characterized in that the gas discharge space of the plasma display panel surrounded by the front substrate, the rear substrate, and the outer peripheral sealing member is sealed in a state where the pressure in the gas discharge space is higher than the pressure in the outer space of the plasma display panel. Display panel manufacturing method. 2. A state in which a pressure in a gas discharge space of a plasma display panel surrounded by a front substrate, a rear substrate, and an outer peripheral sealing member is higher than a pressure in an outer space of the plasma display panel. The method for manufacturing a plasma display panel according to claim 1, wherein the temperature is maintained from the start of heating for melting the stop member to a temperature equal to or higher than a temperature at which the outer peripheral sealing member softens. 3. The plasma display panel according to claim 1, wherein an outer peripheral sealing member formed on one outer periphery of the front substrate and the rear substrate has an uneven shape.
3. The method for manufacturing a plasma display panel according to 1. 4. A gas discharge space of a plasma display panel surrounded by a front substrate, a rear substrate and an outer peripheral sealing member has at least one gas vent, and gas is introduced from the gas vent. 4. The method for manufacturing a plasma display panel according to claim 1, wherein the outer peripheral sealing member is melted and sealed. 5. The method according to claim 4, wherein the gas to be introduced is heated. 6. The method according to claim 4, wherein the gas to be introduced is a dry gas. 7. The method according to claim 4, wherein the gas to be introduced is dry air. 8. The method according to claim 4, wherein the gas to be introduced contains at least nitrogen. 9. The method according to claim 4, wherein the gas to be introduced contains at least oxygen. 10. The plasma display panel according to claim 1, wherein the plasma display panel is positioned in a closed space capable of evacuating, and the outer peripheral sealing member is melted and sealed while evacuating the closed space. A method for manufacturing a plasma display panel according to any one of the above. 11. A manufacturing apparatus for a plasma display panel which realizes the manufacturing method according to claim 1. 12. A plasma display panel manufactured by the manufacturing method according to claim 1.