JP2003242888A - Plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel which can prevent discharge between adjacent discharge spaces, and efficiently and sufficiently exhaust the discharge spaces. <P>SOLUTION: Two substrates disposed facing each other so as to form a discharge space 5 across a plurality of barrier ribs 4 and a plurality of auxiliary barrier ribs 14 provided between the barrier ribs 4 separately from the barrier ribs 4 are provided, and the width W of the auxiliary barrier ribs 14 at the section parallel to the substrate 3a is reduced toward the barrier rib 4. A space area 13 between the barrier rib 4 and the auxiliary barrier rib 14 is minimized to reduce the exhaust resistance. The exhaust efficiency inside the panel is improved thereby, and a plasma display panel of the excellent image display characteristic can be realized. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel used for displaying images on computers and televisions.

[0002]

2. Description of the Related Art FIG. 6 shows a cross-sectional view of a schematic structure of a conventional AC surface discharge type plasma display panel (hereinafter referred to as a panel), and FIG. 7 shows a cross-sectional view taken along line XX in FIG.

The panel 1 has a structure in which a substrate 2a of a front plate 2 and a substrate 3a of a rear plate 3 are arranged so as to face each other so as to form a discharge space 5 with a plurality of barrier ribs 4 interposed therebetween. A mixed gas of at least one of helium (He), neon (Ne), and argon (Ar) and xenon (Xe) is sealed.

The surface plate 2 is formed on a transparent and insulating substrate 2a, such as glass, so that the strip-shaped scan electrodes 6 and the sustain electrodes 7 are paired with each other with a discharge gap (Dy) therebetween. Are arranged in parallel with each other, and the dielectric layer 8 is formed thereon.
And the protective film 9 is formed. Each of the scan electrode 6 and the sustain electrode 7 has a structure in which metal electrodes 6b and 7b for reducing the line resistance are formed as bus electrodes on the transparent electrodes 6a and 7a, respectively.

The back plate 3 has a plurality of strip-shaped data electrodes 10 arranged in parallel in a direction orthogonal to the scan electrodes 6 and the sustain electrodes 7 on an insulating substrate 3a such as glass. This data electrode 10 is isolated one by one,
In addition, strip-shaped barrier ribs 4 for forming the discharge space 5 are provided between the data electrodes 10. Then, the phosphor 11 is formed on the substrate 3 a, the data electrode 10, and the side surface of the partition wall 4.

The image on the panel 1 is such that the image display is viewed from the side of the surface plate 2, and the fluorescent substance is generated by the ultraviolet rays generated by the discharge between the scan electrode 6 and the sustain electrode 7 in the discharge space 5. 11 is excited and the visible light from the phosphor 11 is emitted as display light for one pixel.

Here, as shown in FIG. 8, when the partition wall 4 is a striped panel, the scan electrodes 6 or the sustain electrodes 7 are formed.
In order to prevent erroneous discharge caused by interference of discharge between pixels, a distance between the scan electrode 6 and the sustain electrode 7 that configures the adjacent pixel and a so-called inter-pixel distance is smaller than the discharge gap (Dy). You need to take twice as wide.

Here, there is an increasing demand for higher definition of the panel 1, and in order to meet this, the panel 1 is required.
Since it is necessary to reduce the inter-pixel distance of 1 compared with the related art, it is also necessary to reduce the discharge gap at the same time for the purpose of preventing erroneous discharge, for the reason described above. However, the prevention of erroneous discharge by reducing the discharge gap causes a new problem of lowering panel brightness. Therefore, by reducing only the inter-pixel distance while leaving the discharge gap, it is possible to realize high definition and high brightness at the same time. There is a demand for a configuration that

As one of the above-mentioned constitutions, there is a constitution in which auxiliary barrier ribs are provided at corresponding positions between the adjacent discharge spaces 5 to prevent interference between the discharge spaces 5 due to discharge and shorten the distance between pixels. . However, in this configuration, if the discharge space 5 is completely divided for each pixel, unnecessary gas in the discharge space 5 will be removed in the exhaust baking process for cleaning the discharge space 5 after sealing the panel 1. Since it becomes difficult to discharge the liquid to the outside of the panel 1, the auxiliary partition wall 12 having a structure as shown in FIG. 8 can prevent erroneous discharge between pixels and can efficiently and sufficiently discharge the discharge space 5. Proposed.

Details of the auxiliary partition wall 12 will be described with reference to FIG. The same parts as those in FIGS. 6 and 7 are designated by the same reference numerals. The auxiliary barrier ribs 12 are formed on the substrate 3a of the back plate 3, and the phosphors 11 are applied on the side surfaces of the barrier ribs 4 and the substrate 3a.

The auxiliary partition 12 is provided separately from the partition 4, and a gap region 13 is formed between the auxiliary partition 12 and the partition 4. In addition, the shape of the auxiliary partition wall 12 is such that the width of the central portion is the narrowest and the width increases as it approaches the partition walls 4 on both sides.

By forming the auxiliary barrier rib 12 in such a shape, the reduction of the discharge space 5 due to the existence of the auxiliary barrier rib 12 can be minimized while maintaining the strength of the auxiliary barrier rib 12, and the gap region 13 is provided. Functions as an exhaust hole when the discharge space 5 is exhausted, so that the discharge space 5 can be exhausted efficiently and sufficiently.
Therefore, the clearance region 13 is required to be formed so that the exhaust resistance generated during the exhaust in the discharge space 5 is as small as possible.

[0013]

The auxiliary partition wall 1 shown in FIG.
In the shape of No. 2, in the shape of the cross section of the auxiliary partition wall 12 parallel to the substrate 3a, the shape of the portion facing the partition wall 4 is a surface, so the exhaust resistance generated in the gap region 13 becomes large, and the discharge space 5 It is difficult to exhaust the inside efficiently and sufficiently. In such a case, unnecessary gas will remain in the discharge space 5, and the image display characteristics of the panel 1 will be significantly deteriorated.

The present invention solves the problems as described above, and realizes a panel which can prevent erroneous discharge between adjacent discharge spaces and can exhaust gas in the discharge spaces efficiently and sufficiently. The purpose is to do.

[0015]

In order to achieve the above object, a plasma display panel of the present invention includes two substrates arranged to face each other so as to form a discharge space by sandwiching a plurality of barrier ribs, and between the barrier ribs. The partition has a plurality of auxiliary partitions provided separately from each other, and the auxiliary partition has a shape in which a width in a cross section parallel to the substrate becomes narrower as it approaches the partition.

As a result, erroneous discharge between adjacent discharge spaces can be prevented, and exhaust in the discharge spaces can be efficiently and sufficiently performed, whereby a panel with high definition and high image display characteristics can be realized.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A panel according to the first embodiment of the present invention will be described below.

FIG. 1 is a perspective view of a schematic panel structure according to the first embodiment of the present invention. In FIG. 1, parts similar to those of the conventional panel structure shown in FIGS. 6, 7 and 8 are shown. The same numbers are assigned and the description is omitted.

The panel has a structure in which a substrate of a front plate (not shown) and a substrate 3a of a back plate 3 are arranged so as to face each other so as to form a discharge space 5 with a plurality of partition walls 4 interposed therebetween.
A mixed gas of at least one of helium (He), neon (Ne), and argon (Ar) and xenon (Xe) is enclosed therein.

The surface plate (not shown) is formed on a transparent and insulating substrate (not shown) such as glass, and the strip-shaped scan electrodes 6 and the sustain electrodes 7 are separated by a discharge gap. They are arranged in parallel so as to form a pair, and a dielectric layer (not shown) and a protective film (not shown) are formed thereon.

Each of the scan electrode 6 and the sustain electrode 7 has a structure in which a metal electrode (not shown) for reducing the line resistance is formed as a bus electrode on a transparent electrode (not shown).

The back plate 3 has a plurality of strip-shaped data electrodes 10 arranged in parallel in a direction orthogonal to the scan electrodes 6 and the sustain electrodes 7 on an insulating substrate 3a such as glass. This data electrode 10 is isolated one by one,
In addition, strip-shaped barrier ribs 4 for forming the discharge space 5 are provided between the data electrodes 10. The auxiliary partition wall 14 is provided between the partition walls 4 separately from the partition walls 4. Here, the width of the auxiliary partition wall 14 in a cross section parallel to the substrate 3a: W
Is narrower toward the partition wall 4, and as a result, the gap region 13 formed by the auxiliary partition wall 14 and the partition wall 4 is formed.
Has a minimal size.

The phosphors 11 are formed on the substrate 3a, the data electrodes 10, and the side surfaces of the partition walls 4.

The image of the panel is designed so that the image display can be seen from the surface plate (not shown) side, and the ultraviolet rays generated by the discharge between the scan electrode 6 and the sustain electrode 7 in the discharge space 5 The phosphor 11 is excited to emit visible light from the phosphor 11 as one pixel for display light emission.

Since the auxiliary barrier ribs 14 are provided between the barrier ribs 4, when the panel is made finer, even if the discharge gap is left unchanged and only the distance between pixels is reduced, an error occurs between the adjacent discharge spaces 5. Therefore, a high-definition and high-luminance panel can be realized at the same time without generating discharge, and since the auxiliary partition wall 14 has the above-described shape, a gap region formed by the partition wall 10 and the auxiliary partition wall 14 is formed. Since the size of the space 13 is the minimum size, the gap area 13 is formed in the discharge space 5 in the exhaust baking process.
When functioning as an exhaust hole for exhausting the inside, the exhaust resistance generated is minimized, and as a result, the exhaust space 5 can be exhausted efficiently and sufficiently, and the stability and reliability of image display characteristics are improved. Is improved.

Further, in order to reliably obtain the effect of the gap region 13 as an exhaust hole, it is necessary to form the auxiliary partition wall 14 on the entire surface of the panel in a state of being reliably separated from the partition wall 4. In the case of the auxiliary partition 12 having the shape as shown in FIG. 8, the auxiliary partition 12 and the partition 4 cannot be properly separated and are connected to each other, so that there is a problem associated with a pattern defect such that the gap region 13 cannot be sufficiently secured. However, in the case of the auxiliary partition 14 having the shape as in the present embodiment, the occurrence of such a pattern defect can be significantly reduced.

In FIG. 1, the phosphor 11 is the auxiliary partition wall 1.
No. 4 shows a state where no coating is applied, but the effect of the present invention is not limited to such a state. For example, a method for forming the phosphor 11 is shown in FIG. As described above, the phosphor 11 may be formed so as to cover not only the side surface of the partition wall 4 and the upper surface of the substrate 3a but also the auxiliary partition wall 14 by using the line jet method in which the phosphor 11 is applied between the partition walls 4 using the nozzle 15. .

Further, when the auxiliary barrier rib 12 has the shape shown in FIG. 8, when the phosphor 11 is formed by the above-mentioned forming method that covers the entire auxiliary barrier rib 14, The gap region 13 is clogged with the phosphor 11 and does not function as an exhaust hole, and further, the applied phosphor 11 rides on the partition wall 4 and the phosphors 11 are provided on the pixel lines of different colors next to each other. However, in the case of the auxiliary partition wall 14 as in the present embodiment, since the gap region 13 has the minimum size, the occurrence of the above problems is reduced. .

As described above, according to this embodiment, it is possible to realize a panel having high definition and high image display characteristics.

Further, the shape of the auxiliary partition wall 14 for obtaining the effect of the present invention is not limited to the shape shown in FIG. 1, but may be the shape shown in FIGS. 3 (a) to 3 (d). . 3 is a sectional view of the auxiliary partition wall 14 taken along a plane parallel to the substrate (not shown) surface of the back plate. Fig.3 (a)-
The auxiliary partition wall 14 shown in (c) has a shape in a cross section parallel to the substrate (not shown) surface of the rear plate, and the shape of the portion facing the partition wall 4 is a sharp shape so that the exhaust resistance is not generated. Since it is possible to minimize the gap area 13 that is the cause, it is possible to maximize the effect of the present invention. Further, the auxiliary partition wall 14 shown in FIG. 3D has a cross-sectional shape in a plane parallel to the substrate (not shown) surface of the back plate,
The shape of the portion facing the partition wall 4 is rounded, and has a mechanical strength higher than that of a pointed shape. Therefore, when the auxiliary partition wall 14 is formed and after the formation of the auxiliary partition wall 14, It is possible to reduce the occurrence of problems such as "chips / shape variations".

Further, by making the heights of the partition wall 4 and the auxiliary partition wall 14 the same, they can be formed by one exposure and development, and the panel can be manufactured at low cost.

(Second Embodiment) The second embodiment of the present invention will be described below.
The panel in the embodiment will be described.

FIG. 4 shows a cross section of the auxiliary partition wall 14 in the second embodiment of the present invention which is parallel to the surface of the substrate 3a, and the other structures are the same as those of the first embodiment of the present invention. , Which will be omitted in the following description.

As shown in FIG. 4, the auxiliary partition wall 14 of the present embodiment is provided independently of the partition wall 4, and the width of the back plate of the auxiliary partition wall 14 in a cross section parallel to the substrate 3a. ,
The shape is such that it becomes narrower as it gets closer to the partition walls 4 and becomes narrower at the central portion between the partition walls 4.

By forming the auxiliary barrier rib 14 in such a shape, the discharge space can be made wider than that of the first embodiment, and the same effect as that of the first embodiment can be obtained. At the same time, it is possible to further increase the brightness of the panel.

The shape of the auxiliary partition wall 14 for obtaining the effect of the present embodiment is not limited to that shown in FIG. 4, and may be a shape as shown in FIG.

Also in the present embodiment, by making the heights of the partition wall 4 and the auxiliary partition wall 14 the same, they can be formed by one exposure and development, and the panel can be manufactured at low cost. It will be possible.

In the above description, the auxiliary barrier ribs 14 and the barrier ribs 4 are formed directly on the substrate 3a, but the structure is not limited to this. For example, the substrate on which the data electrodes 10 are formed. Even if the insulating layer is present on 3a and the partition 4 and the auxiliary partition 14 are formed on this insulating layer, the effect of the present invention can be obtained similarly.

In the above description, the AC surface discharge type is described as an example, but the present invention is not limited to this, and a DC type,
Similar effects can be obtained in other panels such as the opposed discharge type.

[0040]

As described above, according to the present invention, erroneous discharge between discharge spaces can be prevented, and exhaust in the discharge space can be efficiently and sufficiently performed, resulting in high definition and high image quality. It is possible to realize a panel having display characteristics.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a plasma display panel according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the concept of applying a phosphor paste by a line jet method.

3A to 3D are cross-sectional views showing another example of the auxiliary partition wall in the present invention.

FIG. 4 is a view showing an auxiliary barrier rib of the plasma display panel according to the second embodiment of the present invention.

FIG. 5 is a view showing another example of the auxiliary partition wall in the present invention.

FIG. 6 is a sectional view of an essential part showing the configuration of a conventional plasma display panel.

7 is a sectional view taken along line XX of FIG.

FIG. 8 is a perspective view showing a configuration of a conventional plasma display panel having an auxiliary partition wall.

[Explanation of symbols]

1 panel 2 Surface plate 2a substrate 3 back plate 3a substrate 4 partitions 5 discharge space 11 phosphor 13 Gap area 14 auxiliary partition

Continued front page    (72) Inventor Ryuichi Murai             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Koji Akiyama             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 5C040 FA01 FA04 GB03 GB14 GF03                       GF12 MA17

Claims (5)

[Claims] 1. A plurality of barrier ribs sandwiching a plurality of barrier ribs are arranged to face each other so as to form a discharge space, and a plurality of auxiliary barrier ribs provided separately from the barrier ribs. A plasma display panel having a shape in which a width in a cross section parallel to a substrate becomes narrower as it approaches a partition wall. 2. The plasma display panel according to claim 1, wherein, in a shape of the auxiliary partition wall in a cross section parallel to the substrate, a shape of a portion facing the partition wall is sharp. 3. The plasma display panel according to claim 1, wherein, in a shape of the auxiliary partition wall in a cross section parallel to the substrate, a shape of a portion facing the partition wall is rounded. 4. The width of the auxiliary partition wall in a cross section parallel to the substrate is
The plasma display panel according to claim 1, wherein the plasma display panel has a shape that becomes narrower toward the partition walls and becomes narrower in a central portion between the partition walls. 5. The partition and the auxiliary partition have the same height.
5. The plasma display panel according to any one of 4 to 4.