JP2003162964A - Plasma display panel, method of manufacturing the same, and plasma display device - Google Patents

Abstract

(57) [Problem] To provide a plasma display panel with good production efficiency. Further, the present invention also provides a method for manufacturing the plasma display panel, and a plasma display device employing the plasma display panel. An address electrode is sealed at one end by a sealing frit (display area).
Outside as address terminals 8a.
At the other end (upper side 2b of back glass substrate 2), it is not projected outside the display area. This makes it possible to omit the work of insulation treatment and moisture-proof treatment at the other end while using the address terminal 8a as a voltage supply terminal. Therefore, a coating operation and a drying time are not required, and a plasma display panel with good production efficiency can be obtained.

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 and a manufacturing method thereof, and a plasma display device, and more particularly, to a plasma display panel having an improved structure of a terminal portion of an address electrode, a manufacturing method thereof, and a plasma thereof. The present invention relates to a plasma display device using a display panel.

[0002]

2. Description of the Related Art In recent years, although the display screen of a plasma display panel tends to be large for public display, it is tending to be small and high definition for general household use.

In order to reduce the size and definition of the display screen, it is necessary to make each electrode constituting the plasma display panel thinner. In particular, the address electrodes have a small electrode pitch, and cannot be made too thick in order to reduce the capacitance between adjacent electrodes.

However, when the electrode becomes thin, the probability of the electrode breaking in the manufacturing process increases due to the adhesion of foreign matter to the electrode, the thermal stress in the firing process, and the like. For this reason,
A disconnection inspection process for confirming the presence or absence of disconnection is required in the manufacturing process, and for this inspection, the plasma display panel needs to have a structure suitable for inspection.

First, a general structure of a plasma display panel and a forming process thereof will be described. FIG. 10 is a plan view of a conventional general plasma display panel P6 viewed from the front, and FIG. 11 is an exploded perspective view showing the internal structure thereof. Further, FIG. 12 is a flowchart showing an outline of a manufacturing process of plasma display panel P6.

The plasma display panel P6 is constructed by bonding the front glass substrate 1 and the rear glass substrate 2 at their peripheral portions with a sealing frit 12 which is a sealing material made of glass paste or the like. As shown in FIG. 11, on the inner main surface (rear surface) of the front glass substrate 1, a display electrode pair 5 including a linear X electrode 3 and a Y electrode 4 for generating surface discharge is displayed. It is arranged for each line of the matrix. In addition, in FIG. 10, the display of the internal structure of the plasma display panel inside the sealing frit 12 is omitted. Further, FIG. 11 illustrates only one line in the matrix.

Each of the display electrode pair 5, that is, the X electrode 3 and the Y electrode 4 is composed of a wide transparent electrode and a narrow bus electrode laminated on the transparent electrode (in FIG. 11, Transparent electrodes and bus electrodes are not shown to avoid complication). These transparent electrodes and bus electrodes are formed on the back surface of the front glass substrate 1 and then baked to firmly adhere to the front glass substrate 1 (steps ST1a and ST1b in FIG. 12). The transparent electrodes and the bus electrodes are subjected to a disconnection inspection after they are formed, and those having disconnections are repaired (repaired) at the disconnection points.

Then, as shown in FIG. 10, the bus electrodes in the X electrode 3 and the Y electrode 4 are extended to the left side portion 1a and the right side portion 1b of the front glass substrate 1 which are outside the display area, and a voltage is applied from the outside. It functions as an X terminal 3a and a Y terminal 4a for supplying. The X terminal 3a and the Y terminal
Since the terminals 4a are formed on the back surface of the front glass substrate 1, they are shown by broken lines in FIG.

Further, as shown in FIG. 11, a dielectric layer 6 is further formed on the back surface of the front glass substrate 1 so as to cover the display electrode pair 5 from the discharge space, and firing is performed (FIG. 12). Step ST1c). Then, a protective film 7 containing MgO (magnesium oxide) as a main component is formed on the surface of the dielectric layer 6 (step ST1d in FIG. 12).

On the other hand, on the inner main surface (front surface) of the rear glass substrate 2, as shown in FIG. 11, address electrodes 8 are formed so as to be orthogonal to the display electrode pairs 5 formed on the front glass substrate 1. -Baking (step ST2a of FIG. 12).
Note that the address electrode 8 is also subjected to a disconnection inspection after its formation, and repair is performed on the disconnected electrode.

The address electrode 8 is, as shown in FIG.
It extends to the lower side 2a and upper side 2b of the rear glass substrate 2 outside the display area, and functions as address terminals 8a and 8b. However, the address terminal for supplying a voltage from the outside during the display operation is the address terminal 8 on the lower side.
Only a. The address terminal 8b is only used in the inspection process.

The address electrodes 8 on the rear glass substrate 2 are also provided.
A dielectric layer 9 is formed and fired on the surface including (see FIG. 12).
Step ST2b), and a plurality of linear partition walls 10 are formed and fired on the upper layer so as to be arranged in a row between the address electrodes 8 (Step ST2c in FIG. 12).
Then, the three primary colors of R (red), G (green), and B (blue) for full-color display are provided so as to cover the surface of the dielectric layer 9 and the side surface of the partition wall 10 including the upper part of the address electrode 8. Phosphor 11 is formed and fired (step ST in FIG. 12).
2d).

The front glass substrate 1 and the back glass substrate 2 are attached to each other by a sealing frit 12 at the peripheral edge of the substrate through the discharge space defined by the partition wall 10. Specifically, the sealing frit 12 is applied to the surface of the rear glass substrate 2 in advance and pre-baked (step ST2e in FIG. 12). Then, the front glass substrate 1 and the rear glass substrate 2 are aligned, and the sealing frit 12 is heated to perform sealing (step ST3 in FIG. 12).
a). After that, the disconnection inspection is performed again.

The discharge space is filled with a discharge gas such as a Ne-Xe mixed gas for irradiating ultraviolet rays during discharge to excite the phosphor 11 (step ST3 in FIG. 12).
b).

In the structure of the conventional plasma display panel P6 as described above, the upper side portion 2b and the lower side portion 2a are arranged.
Address terminals 8a and 8b of the address electrode 8 are exposed at both ends of the. Therefore, even after the dielectric layer 9 is formed on the address electrode 8, the disconnection inspection of the address electrode 8 is performed by checking the continuity between the address terminals 8a and 8b even after the plasma display panel is finally completed. It is possible to

Further, even if the address electrode 8 is broken, the address terminals 8a and 8b are
If the connection is made via a repair wiring newly provided outside the panel, the voltage supplied from the address terminal 8a is also applied to the address terminal 8b via the repair wiring. Therefore,
Since the voltage is supplied to the address electrode 8 from both the address terminals 8a and 8b so as to sandwich the broken portion, the broken plasma display panel can be remedied.

However, the repair work is a technique that requires a very high degree of training, and the work efficiency is not good. Therefore, the repair work is performed only when a few wires are broken. Normally,
As shown in FIG. 2, a disconnection inspection is performed after step ST3a, which is a sealing process, and only the plasma display panel with a few disconnections that can be repaired with an acceptable product is advanced to the next process.

Exhaust and discharge gas filling step ST
When 3b is completed, the plasma display panel is completed (step ST3c), but after that, re-inspection by lighting is performed. Again, if necessary, we will repair it.

FIG. 13 is a graph showing the relationship between the address electrode width and the disconnection defect rate of the address electrode, in which several tens of conventional plasma display panels P6 were manufactured with various address electrode widths. In this graph, the disconnection inspection performed after forming the address electrodes is indicated by a broken line, and the disconnection inspection performed after the sealing step is indicated by a solid line. The disconnection defect rate refers to the ratio of the number of panels in which disconnection is found among the panels having the same address electrode width, and if even one of the address electrodes has a disconnection, it is determined to be defective.

According to FIG. 13, the disconnection defect rate examined after forming the address electrodes (immediately after step ST2a) is almost 100% defective when the electrode width is 30 μm or less, and the electrode width is 100 μm.
With the above, it is finally below 10%. However, at this stage, the disconnection defect is repaired, the process proceeds to the sealing process of step ST3a, and the disconnection defect rate examined after that is the electrode width 30.
Below 90 μm, about 90% is still defective, but the electrode width decreases sharply (to almost 10%) between 40 μm and 60 μm, and becomes 0% when the electrode width is 100 μm.

For example, in Japanese Patent Laid-Open No. 11-339667, in order to facilitate repair, instead of providing repair wiring outside, a frame-shaped repair wiring film is provided outside the display surface side display area of the front glass substrate. Has been described in advance, so that the address terminal on the upper side and the address terminal on the lower side can be easily connected to each other when the disconnection of the address electrode occurs.

[0022]

In the conventional plasma display panel P6, not only the address terminal 8a of the address electrode 8 for supplying a voltage but also the address terminal 8b located on the opposite side is outside the display area. Is exposed to. By adopting this structure, a disconnection inspection is performed after sealing to determine whether the product is good or bad, and even a defective product can be repaired by repair wiring,
It has responded to the increase in the frequency of disconnection due to the miniaturization and high definition of plasma display panels.

When the plasma display panel P6 is connected to its drive circuit and mounted in a housing to form a plasma display device, a signal is exchanged with the substrate of the drive circuit for the address terminal 8a on the voltage supply side. F
A PC (Flexible Printed Circuit) is connected. In this case, in order to prevent the portion of the address terminal 8a other than the connection surface with the FPC from coming into contact with other conductive parts or being oxidized by moisture, the insulating / moisture-proof resin is applied to the address terminal 8a. To be coated.

In the case of the conventional plasma display panel P6, since the address terminal 8b is also exposed outside the display area, it is necessary to perform the same coating as the address terminal 8a in order to insulate and prevent moisture in this portion. . Therefore, there is a drawback in that the production efficiency is lowered due to the coating work, the drying time of the coating material and the like. This also applies to the case where the repair wiring film is previously formed as in the technique disclosed in Japanese Patent Laid-Open No. 11-339677.

Therefore, an object of the present invention is to provide a plasma display panel with high production efficiency.
Also provided are a method of manufacturing the plasma display panel, and a plasma display device using the plasma display panel.

[0026]

According to a first aspect of the present invention, there is provided a first glass substrate having a plurality of display electrode pairs formed on the main surface and a second glass substrate having a plurality of address electrodes formed on the main surface. A glass substrate, the first and second glass substrates are bonded together with the main surfaces facing each other, and are sealed at their peripheral portions, and the address electrode is sealed at one end thereof. It is a plasma display panel that projects outside the region where the sealing is performed, while not projecting outside the region where the sealing is performed at the other end.

The invention according to claim 2 is the plasma display panel according to claim 1, wherein the width of the address electrode is 50 μm or more.

The invention according to claim 3 is the plasma display panel according to claim 1, wherein, on the other end side of the address electrode, the side of the second glass substrate is the first glass. The plasma display panel does not protrude beyond the side of the substrate.

According to a fourth aspect of the present invention, a plurality of display electrode pairs are formed on the main surface, and a first glass substrate having a size in which two plasma display panels are juxtaposed and an address electrode are provided on the main surface. A second glass substrate having a size in which a plurality of plasma display panels are arranged side by side is formed, and the first and second glass substrates are bonded together while the main surfaces are opposed to each other, and The plasma display panels are sealed at their peripheral portions, and the direction of juxtaposition of the two sheets is the direction in which the address electrodes extend.

A fifth aspect of the present invention is a plasma display comprising the plasma display panel according to any one of the first to fourth aspects and a plasma display panel drive circuit for controlling the drive of the plasma display panel. It is a device.

According to a sixth aspect of the present invention, there are provided two plasma display panels according to the third aspect, and a plasma display panel drive circuit for controlling driving of the two plasma display panels. The plasma display panel is a plasma display device in which the other ends of the address electrodes are arranged side by side so that the sides of the first glass substrate face each other.

In the invention described in claim 7, (a) a step of forming a plurality of display electrode pairs on the main surface of the first glass substrate, and (b) addressing on the main surface of the second glass substrate. The method comprises the steps of forming a plurality of electrodes, and (c) bonding the first and second glass substrates so that the main surfaces face each other and sealing the peripheral edges of each other. The electrode is a method of manufacturing a plasma display panel, in which one end of the electrode protrudes to the outside of the sealed region and the other end of the electrode does not protrude to the outside of the sealed region.

The invention described in claim 8 is the method for manufacturing a plasma display panel according to claim 7, wherein the sealing is performed by applying a sealing material to the peripheral portion of the first glass substrate. Is a method for manufacturing a plasma display panel, in which the first and second glass substrates are bonded together and then fired.

The invention according to claim 9 is the method for manufacturing a plasma display panel according to claim 7, wherein the width of the address electrode is 50 μm or more.

The invention according to claim 10 is the method for manufacturing a plasma display panel according to claim 7,
A method of manufacturing a plasma display panel, in which the side of the second glass substrate on the other end side of the address electrode does not protrude from the side of the first glass substrate.

An eleventh aspect of the present invention is the method of manufacturing a plasma display panel according to the tenth aspect, wherein the sealing is performed by forming a flat portion of a sealing material having a substantially L-shaped cross section. It is a method of manufacturing a plasma display panel, which is performed by sandwiching the first and second glass substrates on the other end side of the address electrode while firing the same.

According to the twelfth aspect of the invention, (a) the first plasma display panel having a size in which two plasma display panels are juxtaposed is provided.
Forming a plurality of display electrode pairs on the main surface of the glass substrate, and (b) forming a plurality of address electrodes on the main surface of the second glass substrate having a size in which two plasma display panels are juxtaposed. And (c) bonding the first and second glass substrates so that the principal surfaces face each other, and sealing the portions at the peripheral portions of each other and at the boundary between the juxtaposed portions of the two sheets. And (d) the above 2
A step of cutting the sealed first and second glass substrates at the boundary of juxtaposition of two sheets, and the juxtaposition direction of the two sheets is plasma in which the address electrodes extend. It is a manufacturing method of a display panel.

[0038]

BEST MODE FOR CARRYING OUT THE INVENTION <First Preferred Embodiment> The present embodiment is a plasma display panel in which an address terminal on the voltage supply side is provided at one end of an address electrode while no address terminal is provided at the other end. Is. This eliminates the need for the work of insulation treatment and moistureproof treatment at the other end, and a plasma display panel with high production efficiency can be obtained.

As described in the description of the prior art, the causes of the address electrode disconnection are mainly the adhesion of foreign matter and the thermal stress.

The disconnection due to the adhesion of foreign matter is easy to find in the disconnection inspection after the address electrode forming step (step ST2a) in FIG. 12 and can be repaired. In the disconnection inspection at this stage, since the address electrodes are all exposed, it is possible to apply a voltage to an arbitrary place in the address electrodes. Therefore, it is not always necessary to provide the address terminal 8b in FIG. 10 for applying the voltage.

Further, the disconnection due to the thermal stress is likely to occur mainly in the portion to be bonded with the sealing material (sealing portion) during heating in the sealing step. When the wiring is broken at the sealing portion near the address terminal 8a on the voltage supply side in FIG. 10, the voltage is not supplied to the upper side of the broken portion of the address electrode. Therefore, in the panel after completion, from the top to the bottom of the display area. Turns off. On the other hand, when the wire is disconnected at the sealing part on the opposite side, that is, the sealing part near the address terminal 8b, a voltage is applied from the address terminal 8a on the voltage supply side to the disconnection part of the address electrode. Since the display area on the panel lights without any problem, even if the wire is broken, it does not cause a defect.

Sealing step in FIG. 12 (step ST3a)
In the subsequent disconnection inspection, the continuity between the address terminals 8a and 8b can be inspected to confirm whether or not a disconnection has occurred in each address electrode. However, since the discharge gas is not enclosed, it cannot be confirmed until lighting. Further, since the front glass substrate 1 and the rear glass substrate 2 have already been bonded together, the inspection probe cannot be applied to the address electrode in the sealed region, and the position of one address electrode cannot be applied. It is not possible to identify if there is a disconnection.

As described above, when the wiring is broken at the sealing portion near the address terminal 8a on the voltage supply side, the address electrode becomes unlit, and the panel becomes a defective product. On the other hand, the address terminal on the opposite side. When the wire is broken at the sealing portion near 8b, the display area is lit without any problem, and therefore even if the wire is broken, it does not cause a defect. Therefore, the address terminals 8a, 8b
Even if the continuity between them is checked, there is a possibility that a non-defective panel is erroneously determined to be defective and an unnecessary repair work is performed.

Further, as described in the explanation of the graph of FIG. 13 described above, when the disconnection defect is repaired after forming the address electrode, the disconnection defect rate of the address electrode is 40 to 60 μm.
When the electrode width is 100 μm, the value drops sharply to about 0%. Therefore, the width of the address electrode is preferably 1
If it is 00 μm or more, or at least about 40 to 60 μm or more, it can be said that the disconnection defect rate is considerably low.

Therefore, the following can be said. That is,
If the address electrode 8 extends the address terminals 8a and 8b at the upper and lower ends of the plasma display panel as in the conventional plasma display panel P6, there is an advantage that the disconnection inspection / repair of the address electrode can be performed after the sealing process. . However, on the other hand, there is a possibility that an additional coating work for insulating / moisture-proofing the address terminal 8b and an additional drying time are required, and an unnecessary repair work may be performed depending on the disconnection state. Therefore, the structure of the conventional plasma display panel P6 does not always have high production efficiency.

The width of the address electrode is at least 40.
If it is about 60 μm or more, the disconnection defect rate after sealing of the plasma display panel is significantly reduced by performing disconnection inspection and repair of disconnection at the address electrode formation stage. Therefore, the disconnection inspection work itself after the sealing process is performed. It is considered safe to omit the. This is because a defective product can be detected by a disconnection inspection by lighting after completion.

In conclusion, if the width of the address electrode is made sufficiently large, it can be said that the disconnection inspection address terminal 8b in FIG. 10 may be omitted. Therefore, in the present embodiment, the address terminal on the voltage supply side is provided at one end of the address electrode, while the address terminal is not provided at the other end.

FIG. 1 is a view of the plasma display panel P1 according to this embodiment as seen from the front surface of the panel. Figure 1
In, the front glass substrate 1 and the rear glass substrate 2 are
The main surfaces are bonded while facing each other, and are sealed at their peripheral portions by a sealing frit 12.

Although the structure inside the panel, which is the display area, is omitted in FIG. 1, the inner main surface (rear surface) of the front glass substrate 1 is similar to the exploded perspective view of FIG. A display electrode pair, a dielectric layer, and a protective film are formed. Further, like the plasma display panel P6 of FIG. 10, the X terminal 3a forming the display electrode pair is extended to the left side portion 1a of the back surface of the front glass substrate 1, and the Y terminal forming the display electrode pair is extended to the right side portion 1b. 4a is extended.

Although not shown, the address electrodes, dielectric layers, partition walls, and phosphors are also formed on the inner main surface (front surface) of the rear glass substrate 2 as in the exploded perspective view of FIG. Has been done. Then, similar to the plasma display panel P6 of FIG. 10, the lower side portion 2a of the rear glass substrate 2 is
An address terminal 8a is formed as a terminal portion for supplying a voltage to the address electrode. Further, similarly to the plasma display panel P6 of FIG. 10, a mixed gas of Ne—Xe is sealed as a discharge gas inside the plasma display panel P1.

However, in the present embodiment, the end portion of the address electrode on the upper side portion 2b of the rear glass substrate 2 is formed as shown in FIG.
The address terminal 8b of 0 is not provided. That is, the address electrode is the longest and terminates at the uppermost part of the sealing frit 12 near the upper side 2b of the rear glass substrate 2 (however, the address electrode is not exposed at the upper side 2b). In other words, one end of the address electrode projects as an address terminal 8a outside the sealed region (display region of the panel), while the other end of the address electrode is outside the sealed region. Not protruding.

The width of the address electrode in the display area may be 80 μm, for example.

Similar to FIG. 13, FIG. 2 shows the plasma display panel according to the present embodiment having the structure in which the address terminals on the upper side are not provided, and various address electrode widths are experimentally manufactured to obtain the address electrode width and the address. It is a graph which investigated the relationship with the disconnection failure rate of an electrode. In this graph, the broken wire inspection is shown after the formation of the address electrodes, and the solid line is shown after the completion of the sealing and gas filling steps. The disconnection defect rate refers to the ratio of the number of panels in which disconnection is found among the panels having the same address electrode width, and if even one of the address electrodes has a disconnection, it is determined to be defective.

In the plasma display panel having the structure in which the address terminals on the upper side are not provided, it is not possible to check the continuity after the exhaust is completed.
A disconnection defect was confirmed in a lighting test after completion of the plasma display panel.

According to this, the rate of disconnection defects after completion of the plasma display panel is 40% for the address electrode width.
It can be seen that there is a sharp drop between μm and 60 μm. In particular, it can be seen that if the thickness is less than 50 μm, the disconnection defect rate rapidly increases. Therefore, if the plasma display panel has an address electrode width of 50 μm or more,
It is conceivable that a disconnection inspection after sealing is not necessary, and a defective product may be detected only by a lighting test after completion.

According to the plasma display panel of the present embodiment, the address electrode is projected at one end as an address terminal 8a to the outside of the sealed region, while the other end is sealed. Does not project outside the area. Therefore, while the address terminal 8a can be used as a voltage supply terminal, it is not necessary to perform an insulating process and a moistureproof process on the other end. Therefore, the coating work and the drying time are not required, and the plasma display panel with high production efficiency can be obtained.

Further, the width of the address electrode is set to 50 μm or more, and the disconnection defect rate after sealing is remarkably reduced by performing the disconnection inspection and the repair of the disconnection in the step of forming the address electrode. Therefore, the disconnection inspection after sealing can be omitted,
A plasma display panel with high production efficiency can be obtained.

A plasma display panel drive circuit (not shown) for controlling the drive of the plasma display panel P1 as described above is connected to the plasma display panel P1 and mounted in a housing to form a plasma display device. . In this case, it goes without saying that the plasma display device also belongs to the scope of the present invention.

If the plasma display panel according to the present embodiment is manufactured by the same method as the manufacturing process of FIG. 12 (however, the address terminal 8a is provided but the address terminal 8b is not provided as described above), Since the address terminal 8b does not exist, it is not necessary to perform the work of insulation treatment and moistureproof treatment, and the plasma display panel can be manufactured with high production efficiency.

Particularly, if the width of the address electrode is set to 50 μm or more, the disconnection defect rate after sealing is significantly reduced by performing disconnection inspection and repair of disconnection at the address electrode forming stage. It is possible to omit the disconnection inspection after wearing and to manufacture the plasma display panel with high production efficiency.

<Second Preferred Embodiment> This preferred embodiment is a modification of the plasma display panel according to the first preferred embodiment, and the upper side of rear glass substrate 2 in which address terminals 8b are not provided in the first preferred embodiment. The plasma display panel has a structure in which the portion 2b is also omitted.

FIG. 3 is a view of the plasma display panel P2 according to the present embodiment as seen from the front surface of the panel. In FIG. 3, elements having the same functions as those of plasma display panel P1 according to the first embodiment are designated by the same reference numerals.

In this plasma display panel P2, the upper side 2b of the rear glass substrate 2 without the address terminals 8b is omitted, and the upper side 2c is aligned with the upper side 1c of the front glass substrate 1. That is, the side of the rear glass substrate 2 does not protrude from the side of the front glass substrate 1 on the upper side where the address electrodes do not protrude outside the sealed region.

The other structure is similar to that of the plasma display panel P1 according to the first embodiment, and the description thereof will be omitted.

According to plasma display panel P2 of the present embodiment, the side of rear glass substrate 2 does not protrude from the side of front glass substrate 1 on the upper side. Therefore, a non-display area (lower side portion 2a, left side portion 3a) with respect to the display area (area inside the sealing frit 12),
It is possible to obtain a space-saving plasma display panel in which the ratio of the area other than the display area such as the right side portion 4a and the formation portion of the sealing frit 12 is small.

If the upper sides of the front glass substrate 1 and the rear glass substrate 2 are designed so that their upper sides are aligned with each other, alignment can be facilitated when both glass substrates are sealed.

A plasma display panel drive circuit (not shown) for controlling the driving of the plasma display panel P2 as described above is connected to the plasma display panel P2, and the plasma display panel P2 can be mounted in a housing to form a plasma display device. . In this case, it goes without saying that the plasma display device also belongs to the scope of the present invention.

In addition, a method similar to that of the manufacturing process of FIG. 12 is used (however, as described above, the address terminal 8b also has the upper side portion 2).
If the plasma display panel according to the present embodiment is manufactured, since the address terminal 8b and the upper side portion 2b are not present, the work of the insulating process and the moistureproof process is not required, and the production efficiency is small and the space is small. It is possible to manufacture various plasma display panels.

<Third Embodiment> The present embodiment is a desirable method of manufacturing the plasma display panel according to the first and second embodiments.

It has been described that the plasma display panels P1 and P2 according to the first and second embodiments can be manufactured by the same method as the manufacturing process of FIG. In the present embodiment, the sealing frit 12 is applied / temporarily baked on the front glass substrate 1 instead of being applied / temporarily baked on the rear glass substrate 2 side.

FIG. 4 is a flowchart showing a method of manufacturing the plasma display panel according to the present embodiment. In FIG. 12, the process of “application / temporary firing of sealing frit” was incorporated into the manufacturing flow of the rear glass substrate 2 as step ST2e, whereas in FIG. The process is incorporated as a step ST1e after the “formation of protective film” process (step ST1d) of the front glass substrate 1.

In other respects, the flow of FIG. 4 is different from the flow of FIG. 12 only in that there is no repair process after completion and there is no disconnection inspection after the sealing process. This is because the terminal 8b is omitted. The other steps are the same as those in the flowchart of FIG.

When the plasma display panel is manufactured by the conventional process shown in FIG. 12, the partition wall 10 and the sealing frit 12 are formed.
If the distance between the barrier ribs is small, the sealing frit 12 softens and contacts the partition walls 10 during the calcination stage, and the sealing frit 12 enters between the partition walls 10 due to the capillary phenomenon between the adjacent partition walls 10. There was a problem.

Therefore, when the sealing frit 12 is pre-baked on the rear glass substrate 2, the partition wall 10 and the sealing frit 1 are formed.
It was necessary to provide a certain distance between the two. This has been an obstacle to space saving.

However, in the plasma display panel manufacturing method according to the present embodiment, such a problem does not occur because the sealing frit 12 is applied to the front glass substrate 1 side and pre-baked. This makes it possible to further reduce the distance between the sealing portion and the display area, and further improve the space saving effect.

According to the method of manufacturing the plasma display panel of the present embodiment, the sealing is performed by the front glass substrate 1
After applying the sealing frit 12 to the peripheral edge of the
It is performed by bonding the front glass substrate 1 and the rear glass substrate 2 together and baking them. Therefore, when the partition walls 10 are formed on the main surface of the rear glass substrate 2, the sealing frit 12 does not penetrate between the partition walls, and the distance between the sealing portion and the partition walls can be reduced, which is A plasma display panel having a smaller display area can be manufactured.

<Fourth Preferred Embodiment> The present preferred embodiment is a more desirable manufacturing method of the plasma display panel according to the second preferred embodiment.

5 and 6 are views showing a method of manufacturing the plasma display panel according to the present embodiment.
Both figures are enlarged sectional views of the vicinity of the upper sides 1c and 2c of the plasma display panel P2 of FIG. Note that FIG.
Shows before sealing, and FIG. 6 shows after sealing.

In FIG. 5, reference numeral 13a is a sealing frit having a substantially L-shaped cross section. Such a sealing frit having a substantially L-shaped cross section can be easily molded by pouring a glass paste or the like into a mold having a substantially L-shaped cross section in advance.

As shown in FIG. 5, the flat portion of the sealing frit 13a having a substantially L-shaped cross section is sandwiched between the front glass substrate 1 and the rear glass substrate 2 at the end side of the address electrode before sealing as shown in FIG. , The adhesive 14 on the end face of the rear glass substrate 2.
Will be temporarily fixed. Then, for the other sides, the sealing frit 12 is pre-baked as in the conventional case.

When firing is performed, the sealing frit 13a having a substantially L-shaped cross section is deformed by heating as shown in FIG. 6 to be in a T-shaped 13b state and sealing is performed. The adhesive 14 is assimilated into the sealing frit 13b by heating.

As an example of firing, the sealing frit 1
When the softening point of 3a is 410 ° C., for example, it is 45
The baking may be performed at 0 ° C. for 40 minutes (when the size of the plasma display panel is, for example, 46 inches diagonal).

When such a manufacturing method is used, before sealing, the sealing frit 13a having a substantially L-shaped cross section is L-shaped with respect to the flat portion sandwiched between the front glass substrate 1 and the rear glass substrate 2. The bent portion is fixed so as to be caught on the end surface of the rear glass substrate 2, and the sealing frit 1
Even if 3a is softened by heating in the sealing step, it is difficult for 3a to penetrate into the inside of the panel.

If the L-shaped bent portion faces upward, the sealing frit 13a is softened by heat and covers the end face of the lower front glass substrate 12 by its own weight, and the rear glass substrate 2 by its own weight. It also moves to the end surface of the front glass substrate 1 placed on the lower side and is transformed into a T-shape 13b to cover both end surfaces of the front glass substrate 1 and the rear glass substrate 2.

Therefore, the sealing is more reliable. Further, this makes it possible to shorten the length of the flat portion of the sealing frit 13a sandwiched between the front glass substrate 1 and the rear glass substrate 2, and save the area occupied by the sealing frit with respect to the display area. There is space effect.

<Fifth Embodiment> A fifth embodiment of the present invention is a plasma display device in which two plasma display panels according to the second embodiment are used and arranged so that their upper sides are opposed to each other.

FIG. 7 shows a plasma display device P3 according to the present embodiment, and is a view of the screen portion of the device as seen from the front. It should be noted that in FIG. 7, the display of a casing that covers the entire body and a drive circuit that controls the drive of the two plasma display panels are omitted.

In FIG. 7, reference symbols P2a and P2b.
Is a plasma display panel P according to the second embodiment.
It is 2. The two plasma display panels P2a and P2b are juxtaposed such that the upper sides 1c of the front glass substrates 1 face each other on the side where address terminals are omitted.
It is fixed.

FP is provided on each electrode terminal portion of both panels.
C (Flexible Printed Circuit) 19 is connected, and FP
A drive circuit (not shown) for controlling the drive of the two plasma display panels is connected to the other end of C19.

The driving circuit is arranged on the back side of the plasma display panels P2a and P2b by bending the FPC 19 and other circuits such as a power supply and a signal circuit by fixing means such as screws.

As described above, according to the plasma display device P3 according to the present embodiment, two plasma display panels are provided on the side where the address terminals are omitted from each other.
The front glass substrates 1 are arranged side by side so that the sides 1c face each other. Therefore, the seam is almost only the width of the sealing frit, and the non-display portion between the two screens is very small.
A plasma display device with multi-screen display is obtained.

Further, in the case of the plasma display device P3, the plasma display panel arranged on the upper side is displayed upside down as compared with the case of the normal arrangement, but the control relating to the display is performed by the signal circuit or the like. There is no problem if the display circuit is designed for this multi-display.

Further, depending on the design of the display circuit, the plasma display device P3 can be tilted 90 degrees horizontally to be used as a plasma display device having a double screen size.

<Embodiment 6> In the present embodiment, a front glass substrate and a back glass substrate are prepared in a size of two ordinary plasma display panels, and the peripheral portions thereof and the two glass substrates are arranged side by side. It is a method of manufacturing a plasma display panel, in which a portion at a boundary is sealed and cut at the boundary. As a result, two plasma display panels P2 according to the second embodiment can be simultaneously manufactured, and the plasma display panel can be manufactured with high production efficiency.

FIG. 8 is a diagram showing a method of manufacturing the plasma display panel according to the present embodiment, which is a diagram of the panel P4 after the sealing step as seen from the display surface.

In FIG. 8, reference numeral 15 is a front glass substrate. Front glass substrate 15 is the same as front glass substrate 1 of plasma display panel P2 according to the second embodiment.
It is a front glass substrate of a size in which two address electrodes are juxtaposed in a direction in which the address electrodes extend.

Reference numeral 16 is a rear glass substrate,
Similarly, the rear glass substrate 2 of the plasma display panel P2 has a size in which two rear glass substrates 2 are juxtaposed in the direction in which the address electrodes extend.

Although illustration of the internal structure is omitted in FIG. 8, the upper side 1c of the plasma display panel P2 of FIG. 3 is formed on the back surface of the front glass substrate 15 in FIG.
A display electrode pair, a dielectric layer, and a protective film are formed above and below by two plasma display panels so as to face each other along the cutting line AA, that is, the facing surface 16c. Similarly,
X as a terminal for supplying a voltage to each display electrode pair
The terminal 3a and the Y terminal 4a, the X terminal 3b and the Y terminal 4b are respectively the left side portions 15a and 15c and the right side portion 15b,
15d.

Similarly, on the surface of the rear glass substrate 16, the address electrodes, the dielectric layers, the partition walls, and the phosphors are arranged on the plasma display panel so that the upper side 1c of the plasma display panel P2 of FIG. 3 faces the facing surface 16c. Two sheets are formed up and down.

Address terminals 8a, 8c are formed on the lower side portions 16a, 16b as terminals for supplying a voltage to the respective address electrodes. The width of the address electrode in the display area may be 80 μm, for example, as in the first embodiment.

Further, the front glass substrate 15 and the back glass substrate 16 are sealed by the sealing frit 17, 18. The sealing frit 17, 18 is formed in each of the upper and lower regions divided by the facing surface 16c with a peripheral length and a shape corresponding to one plasma display panel.

That is, sealing is performed at the peripheral portions of the front glass substrate 15 and the rear glass substrate 16 and at the portion located at the boundary of juxtaposition of two plasma display panels (that is, in the vicinity of the facing surface 16c).

Then, the plasma display panel which has been subjected to the sealing step of FIG. 8 is thereafter cut at the facing surface 16c. Then, the panel P4 becomes the two plasma display panels P2 according to the second embodiment, which have completed the sealing step, and thereafter proceed to the exhaust / discharge gas charging step.

When the plasma display panel according to the second embodiment is manufactured by such a manufacturing method, it is possible to perform steps such as electrode formation for two plasma display panels at the same time, and cut at the facing surface 16c. Two plasma display panels can be obtained only by adding steps. Therefore, the plasma display panel can be manufactured with high production efficiency. This is because the plasma display panel according to the second embodiment has only the address terminal 8a and the upper side portion 2b is omitted.

In FIG. 8, the area corresponding to each one of the upper and lower plasma display panels is a sealing frit 1.
Although the seals 7 and 18 are sealed, the seal frit 17a and 18a near the facing surface 16c need not be formed separately. That is, the sealing frit with a thickness that does not leak even if cut is centered around the line AA.
The main formation may be performed.

The cutting step does not necessarily have to be performed immediately after the sealing step, and the cutting step may be performed after the exhaust / gas filling step.

Further, the sealing frit 17, 18 is applied not on the rear glass substrate 16 but on the front glass substrate 15.
In the same manner as in the third embodiment, the sealing frit 17,
The infiltration of the sealing frit between the partition walls during the temporary firing of 18 is suppressed. Therefore, the space between the sealing frit and the display area can be made narrower, and a space saving effect can be obtained.

<Embodiment 7> In this embodiment, the plasma display panel 2 is arranged in the direction in which the address electrodes extend.
It is a plasma display panel provided with a front glass substrate and a back glass substrate having a size in which a plurality of sheets are juxtaposed.
This makes it possible to obtain a plasma display panel having a two-screen multi-display that is seamless and has good production efficiency. The plasma display panel according to the present embodiment has a structure similar to that of the fifth embodiment.

FIG. 9 is a view of the plasma display panel P5 according to the present embodiment as seen from the front surface of the panel.

In FIG. 9, reference numeral 15 is a front glass substrate. The front glass substrate 15 is a front glass substrate having a size in which two plasma display panels are juxtaposed in the direction in which the address electrodes extend.

Reference numeral 16 is a rear glass substrate,
Similarly, it is a rear glass substrate having a size in which two plasma display panels are juxtaposed in the direction in which the address electrodes extend.

Although illustration of the internal structure is omitted in FIG. 9, a plasma display panel having a size of one sheet is formed on the back surface of the front glass substrate 15 at a portion of a cutting line BB in FIG. That is, the display electrode pairs are formed so as to face each other at the facing surface 16c so as to be vertically aligned by a number corresponding to two plasma display panels.
A dielectric layer and a protective film are formed on the display electrode pair so as to cover the entire upper and lower sides of the facing surface 16c.

Similarly, the X terminal 3a and the Y terminal 4a, and the X terminal 3b and the Y terminal 4b are left side portions 15a and 15d, respectively, as terminals for supplying a voltage to each display electrode pair.
And the right side portions 15b and 15c.

Further, on the surface of the rear glass substrate 16, address terminals 8a and 8c are provided as terminals for supplying a voltage to the respective address electrodes, the upper side portion 16b and the lower side portion 1b.
6a. Here, the address electrode is the center line B-
Formed in the vertical direction of the front glass substrate 16 with a slight gap around B as a center, that is, in the vertical direction, and the address terminals 8a, 8 are formed on the lower and upper sides, respectively.
project as c. The width of the address electrode in the display area may be 80 μm, for example, as in the first embodiment.

The dielectric layer, the partition walls, and the phosphor are formed continuously in the upper and lower regions without a gap at the center line BB.

The front glass substrate 15 and the rear glass substrate 16 are sealed with each other at their peripheral portions.
And a mixed gas of Ne—Xe is sealed as a discharge gas inside.

In the plasma display panel having such a structure, since the two plasma display panels face each other in the discharge space, the non-display area between the two panels is substantially zero. A screen multi-plasma display device can be realized.

Further, when the plasma display panel P5 according to the present embodiment is applied to a plasma display device of two-screen multi-display, it is possible to perform steps such as electrode formation for two plasma display panels at the same time. Therefore, the production efficiency is higher than that in the case of manufacturing the plasma display device according to the fifth embodiment.

That is, it is possible to obtain a plasma display panel of two-screen multi-display which is seamless and has high production efficiency.

By the way, in the case of the plasma display panel according to the present embodiment, in the case where the display circuit controls a portion of the size of one panel above the facing surface 16c, the display circuit in the fifth embodiment is used. Require different behaviors. That is, in the present embodiment, the phosphor is formed so as to penetrate through the upper and lower plasma display panel regions, not the two plasma display panels facing each other as simple as in the fifth embodiment. In this area, the color arrangement of the phosphor is the reverse of the normal one.

That is, for example, if the phosphor array in the panel portion below the facing surface 16c is repeated from the left to RGBRGB ..., The phosphor array in the upper panel portion is similarly from the left to RGBRGB. Will be repeated. In the case of the fifth embodiment, the phosphor array in the upper panel portion is repeated from the left in the order of BGRBGR.

However, as in the case of the fifth embodiment, there is no problem in controlling the display of the upper portion if a display circuit such as a signal circuit is designed for this multi-display.

Further, for example, when a circuit for applying a voltage to the X electrode and the Y electrode is to be used as a common substrate in the upper and lower plasma display panels, the upper and lower X terminals and Y terminals may be drawn out in the same direction in the left and right directions. In that case, since the phosphor arrangements in the upper and lower panel portions are repeated from the left to RGB, RGB ..., There is no problem if a display circuit suitable for it is designed for the present multi-display.

Further, depending on the design of the display circuit, the present plasma display device can be tilted 90 degrees horizontally to be used as a plasma display device having a double screen size.

[0125]

According to the first aspect of the invention, the address electrode projects at one end thereof to the outside of the sealed region, while the other end of the address electrode is outside of the sealed region. Does not stick out. Therefore, one end can be used as a voltage supply terminal, while the other end does not require the work of insulation treatment and moistureproof treatment. Therefore, a plasma display panel with high production efficiency can be obtained.

According to the second aspect of the invention, the width of the address electrode is 50 μm or more. Therefore, by performing the disconnection inspection and the repair of the disconnection at the stage of forming the address electrode, the disconnection defect rate after sealing is significantly reduced. Therefore, the disconnection inspection after sealing can be omitted, and a plasma display panel with high production efficiency can be obtained.

According to the third aspect of the invention, on the other end side of the address electrode, the side of the second glass substrate is the first
Does not protrude beyond the side of the glass substrate. Therefore, a space-saving plasma display panel in which the ratio of the non-display area to the display area is small can be obtained. Further, if the size is designed so that the sides of the first and second glass substrates are aligned, the alignment becomes easy when the first and second glass substrates are sealed.

According to the fourth aspect of the present invention, there are provided first and second glass substrates each having a size in which two plasma display panels are juxtaposed in the direction in which the address electrodes extend. Therefore, it is possible to obtain a plasma display panel of two-screen multi-display which is seamless and has good production efficiency.

According to the invention of claim 5, claim 1
The plasma display panel according to any one of claims 1 to 4 has the effect.

According to the sixth aspect of the invention, the two plasma display panels are arranged side by side so that the sides of the first glass substrate face each other on the other end side of the address electrodes. Therefore, it is possible to obtain a plasma display device of two-screen multi-display in which the non-display area of the joint is small.

According to the invention described in claim 7, the address electrode projects at one end thereof to the outside of the sealed region, while at the other end thereof projects to the outside of the sealed region. do not do. Therefore, one end can be used as a voltage supply terminal, while the other end does not require the work of insulation treatment and moistureproof treatment. Therefore, the plasma display panel can be manufactured with high production efficiency.

According to the invention described in claim 8, the sealing is
This is performed by applying a sealing material to the peripheral portion of the first glass substrate and pre-baking it, and then bonding and firing the first and second glass substrates. Therefore, when the partition walls are formed on the main surface of the second glass substrate, the sealing material does not infiltrate between the partition walls, and the distance between the sealing portion and the partition walls can be reduced, and the non-display area It is possible to manufacture a plasma display panel having a smaller size.

According to the ninth aspect of the invention, the width of the address electrode is 50 μm or more. Therefore, by performing the disconnection inspection and the repair of the disconnection at the stage of forming the address electrode, the disconnection defect rate after sealing is significantly reduced. Therefore, the disconnection inspection after sealing can be omitted, and the plasma display panel can be manufactured with high production efficiency.

According to the tenth aspect of the invention, on the other end side of the address electrode, the side of the second glass substrate does not protrude beyond the side of the first glass substrate. Therefore, it is possible to manufacture a space-saving plasma display panel in which the ratio of the non-display area to the display area is small. Further, if the size is designed so that the sides of the first and second glass substrates are aligned, the alignment becomes easy when the first and second glass substrates are sealed.

According to the eleventh aspect of the invention, the sealing is performed by forming a flat portion of the sealing material having a substantially L-shaped cross section,
It is carried out by sandwiching it between the first and second glass substrates on the other end side of the address electrode and firing it. Therefore, the L-shaped bent portion of the sealing material with respect to the flat portion sandwiched between the first and second glass substrates is fixed so as to be caught on either end face of the first and second glass substrates. Therefore, even if the sealing material is softened by heating in the sealing step, it is difficult for the sealing material to penetrate into the inside of the first and second glass substrates. Further, if the L-shaped bent portion faces upward, the sealing material is softened by heat and moves to the end surface of the lower one of the first and second glass substrates by its own weight, It is transformed into a T shape to cover both end faces of the first and second glass substrates. Therefore, the sealing becomes more reliable. Further, this makes it possible to shorten the length of the flat portion of the sealing material sandwiched between the first and second glass substrates, and save the space occupied by the sealing material with respect to the display area. effective.

According to the twelfth aspect of the present invention, the first and second glass substrates are sealed at their peripheral portions and at the portions located at the boundary between two juxtaposed glass plates, and at the boundary, they are sealed. The attached first and second glass substrates are cut. Therefore, it becomes possible to manufacture two plasma display panels according to the third aspect at the same time, and it is possible to manufacture plasma display panels with high production efficiency.

[Brief description of drawings]

FIG. 1 is a diagram showing a plasma display panel according to a first embodiment.

FIG. 2 is a graph showing a relationship between an address electrode width and a disconnection defect rate of the address electrode of the plasma display panel according to the first embodiment.

FIG. 3 is a diagram showing a plasma display panel according to a second embodiment.

FIG. 4 is a flowchart showing a method of manufacturing a plasma display panel according to a third embodiment.

FIG. 5 is a diagram showing a method of manufacturing the plasma display panel according to the fourth embodiment.

FIG. 6 is a diagram showing a method of manufacturing the plasma display panel according to the fourth embodiment.

FIG. 7 is a diagram showing a plasma display device according to a fifth embodiment.

FIG. 8 is a diagram showing a method of manufacturing the plasma display panel according to the sixth embodiment.

FIG. 9 is a diagram showing a plasma display panel according to a seventh embodiment.

FIG. 10 is a diagram showing a conventional plasma display panel.

FIG. 11 is a perspective view showing an internal structure of a conventional plasma display panel.

FIG. 12 is a flowchart showing a conventional method for manufacturing a plasma display panel.

FIG. 13 is a graph showing the relationship between the address electrode width of the conventional plasma display panel and the disconnection defect rate of the address electrode.

[Explanation of symbols]

1 front glass substrate, 1a left side, 1b right side, 2
Back glass substrate, 2a lower side, 2b upper side, 3
X electrode, 3a X terminal, 4 Y electrode, 4a Y terminal, 5
Display electrode pair, 8 address electrode, 8a address terminal, 12, 13a, 13b, 17, 18 sealing frit, 15 front glass substrate, 15a, 15d left side part,
15b, 15c right side part, 16 rear glass substrate, 16
a lower side, 16b upper side, 19 FPC (Flexible
Prited Circuit).

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5C012 AA09 BC03                 5C040 FA01 FA04 GB03 GB14 GC01                       GC11 GK03 GK05 HA01 LA05                       LA14 MA10 MA22 MA26

Claims (12)

[Claims] 1. A first glass substrate having a plurality of display electrode pairs formed on a main surface thereof, and a second glass substrate having a plurality of address electrodes formed on the main surface thereof. The glass substrate is adhered while the main surfaces are opposed to each other, and is sealed at the peripheral portions of each other, and the address electrode at one end thereof protrudes outside the sealed region, while the other is A plasma display panel that does not project outside the sealed region at the edges. 2. The plasma display panel according to claim 1, wherein the address electrodes have a width of 50 μm or more. 3. The plasma display panel according to claim 1, wherein a side of the second glass substrate does not protrude from a side of the first glass substrate on the other end side of the address electrode. Plasma display panel. 4. A plasma display panel, wherein a plurality of display electrode pairs are formed on the main surface, a plurality of first glass substrates having a size in which two plasma display panels are juxtaposed, and a plurality of address electrodes are formed on the main surface. A second glass substrate having a size in which two sheets are juxtaposed, the first and second glass substrates are bonded together with the main surfaces facing each other, and are sealed at their peripheral portions. In the plasma display panel, the two juxtaposed directions are the directions in which the address electrodes extend. 5. A plasma display device comprising: the plasma display panel according to claim 1; and a plasma display panel drive circuit that controls driving of the plasma display panel. 6. The two plasma display panels according to claim 3, and a plasma display panel drive circuit for controlling the driving of the two plasma display panels, wherein the two plasma display panels are mutually connected. The plasma display device is arranged side by side on the other end side of the address electrode so that the sides of the first glass substrate face each other. 7. (a) a step of forming a plurality of display electrode pairs on the main surface of the first glass substrate, and (b) a step of forming a plurality of address electrodes on the main surface of the second glass substrate. (C) bonding the first and second glass substrates so that the main surfaces face each other, and sealing the peripheral surfaces of the first and second glass substrates, and the address electrode has one end thereof A method of manufacturing a plasma display panel, which protrudes outside of a sealed region, while not protruding outside of the sealed region at the other end. 8. The method of manufacturing a plasma display panel according to claim 7, wherein the sealing is performed by applying a sealing material to the peripheral portion of the first glass substrate and temporarily baking the same. A method for manufacturing a plasma display panel, which is performed by laminating and baking a first glass substrate and a second glass substrate. 9. The method of manufacturing a plasma display panel according to claim 7, wherein the address electrode has a width of 50 μm or more. 10. The method for manufacturing a plasma display panel according to claim 7, wherein a side of the second glass substrate is closer to a side of the second glass substrate than a side of the first glass substrate is at the other end side of the address electrode. A method for manufacturing a plasma display panel that does not protrude. 11. The method of manufacturing a plasma display panel according to claim 10, wherein the sealing is performed by forming a flat portion of a sealing material having a substantially L-shaped cross section on the other end of the address electrode. A method for manufacturing a plasma display panel, which comprises performing baking while sandwiching the first and second glass substrates on the side. 12. (a) Plasma display panel 2
A step of forming a plurality of display electrode pairs on the main surface of a first glass substrate having a size of juxtaposed one by one, and (b) a second glass having a size of juxtaposed two plasma display panels A step of forming a plurality of address electrodes on the main surface of the substrate; and (c) bonding the first and second glass substrates so that the main surfaces face each other, and the peripheral portions of the two and the two glass substrates. And a step of (d) cutting the sealed first and second glass substrates at the boundary of the juxtaposition of two sheets, The method for manufacturing a plasma display panel, wherein the two juxtaposed directions are directions in which the address electrodes extend.