JP2004039326A - Plasma display panel and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a plasma display panel of high definition and high luminance by suppressing occurrence of cross talk. <P>SOLUTION: Auxiliary partition walls 12 on both sides of the partition wall 11 are formed to be jointed to the partition wall 11 at the positions of the jointing parts 13 which are mutually slipped. Thereby, the shape change of the partition wall 11 at the jointing parts 13 before and after baking, that is, recess quantity becomes small, and the precision of the shape becomes high. As a result, occurrence of cross talk is suppressed and a plasma display panel of the high definition and high luminance is realized. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a plasma display panel (hereinafter, referred to as a PDP) known as a large-screen, thin, and lightweight display device, and a method for manufacturing the same.
[0002]
[Prior art]
In recent years, PDPs have attracted attention as display panels (thin display devices) with excellent visibility, and higher brightness and higher definition and larger screens are being promoted.
[0003]
This PDP is roughly classified into two types: an AC type and a DC type in terms of driving, and there are two types of discharge types, a surface discharge type and a counter discharge type. At present, PDPs of the AC type and the surface discharge type have become the mainstream.
[0004]
FIG. 7 shows a general structure of this PDP. FIG. 7 is a sectional perspective view showing a schematic configuration of the PDP. The front plate 1 has a structure in which a plurality of display electrodes 5 covered with a dielectric layer 3 and a protective film 4 made of a MgO vapor deposition film are provided on a transparent and insulating substrate 2 such as glass. The display electrode 5 is a pair of a scanning electrode 6a and a sustain electrode 6b. The back plate 7 is provided with a plurality of data electrodes 10 covered with an insulating layer 9 on an insulating substrate 8 such as glass, for example, and between the data electrodes 10 on the insulating layer 9. Stripe-shaped partitions 11 are provided in parallel with 10. Further, for the purpose of suppressing a problem on image display such as crosstalk during high definition, an auxiliary partition wall 12 is provided between the partition walls 11 so as to intersect with the partition wall 11 at the joint portion 13. FIG. 8 shows details of the partition 11 and the auxiliary partition 12. Here, the partition walls 11 and the auxiliary partition walls 12 are formed, for example, by applying a photosensitive paste material, performing exposure to form predetermined partition walls and auxiliary partition walls, developing, and then solidifying by firing. can get.
[0005]
The phosphor layer 14 is formed over the surface of the insulator layer 9 and the side surfaces of the partition 11 and the auxiliary partition 12. The front plate 1 and the back plate 7 are arranged to face each other with the discharge space 15 interposed therebetween so that the scan electrodes 6a and the sustain electrodes 6b are orthogonal to the data electrodes 10. The discharge space 15 is filled with at least one rare gas of helium, neon, argon, and xenon as a discharge gas. The discharge space 15 is partitioned by the partition 11 and the auxiliary partition 12, and the data electrode 10 and the scan electrode 6a are separated. The discharge space 15 at the intersection with the sustain electrode 6b operates as a discharge cell 16.
[0006]
As described above, by providing the auxiliary partition wall 12, it is possible to prevent plasma discharge or ultraviolet light generated by the discharge from leaking to the display cell 16 adjacent to the data electrode 10 in the extending direction, and to obtain a PDP with high brightness. Become. Further, by forming the auxiliary partition wall 12 lower than the partition wall 11, it becomes easy to apply and form the phosphor in the manufacturing process, and it is possible to obtain a PDP having high yield and excellent productivity.
[0007]
[Problems to be solved by the invention]
However, even in such a PDP structure, image quality may deteriorate due to crosstalk during image display. A characteristic point of the crosstalk is that the crosstalk also occurs in the discharge cells 16 located diagonally adjacent to the extending direction of the data electrode 10. Therefore, as a result of examining the cause of the occurrence of the crosstalk, as shown in FIG. 9, it has been confirmed that a dent is generated in the partition 11 at the joint portion 13 between the partition 11 and the auxiliary partition 12, and this dent is formed. As a result, it was found that the plasma discharge easily leaked from the gap formed between the front plate 1 and crosstalk, and that the crosstalk was likely to occur. It is considered that this dent is caused by shrinkage generated in the partition 11 and the auxiliary partition 12 due to baking performed when the partition 11 and the auxiliary partition 12 are formed.
[0008]
The present invention has been made in view of such a situation, and the partition wall and the auxiliary partition wall that partition the discharge space have a structure with increased shape accuracy, thereby suppressing the occurrence of crosstalk, and achieving high image quality and high luminance. It aims at realizing PDP.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the PDP of the present invention is configured by arranging a pair of substrates to face each other such that a discharge space is formed therein, and at least one of the substrates has a plurality of substrates for partitioning the discharge space. It has a partition wall and a plurality of auxiliary partition walls connected to the partition wall between the partition walls, and the auxiliary partition walls on both sides of the partition wall are combined with the partition wall at positions shifted from each other.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
That is, the invention according to claim 1 of the present invention is configured by arranging a pair of substrates to face each other such that a discharge space is formed therein, and at least one substrate has a plurality of partitions for partitioning the discharge space. And a plurality of auxiliary partitions connected to the partitions between the partitions, and the auxiliary partitions on both sides of the partitions are combined with the partitions at positions shifted from each other.
[0011]
According to a second aspect of the present invention, in the first aspect of the present invention, the partition and the auxiliary partition are made of a material obtained by mixing a glass powder and a photosensitive organic substance.
[0012]
According to a third aspect of the present invention, there is provided a method of manufacturing a plasma display panel comprising a pair of substrates arranged to face each other so as to form a discharge space therein, wherein at least one of the substrates has a partition wall. Using a material and an auxiliary partition material, a plurality of partitions and a plurality of auxiliary partitions coupled to the partitions between the partitions are formed such that the auxiliary partitions on both sides of the partitions are coupled to the partitions at positions shifted from each other. And a step of heating and solidifying the formed partition walls and auxiliary partition walls.
[0013]
According to a fourth aspect of the present invention, in the third aspect, the partition wall material and the auxiliary partition wall material are a mixture of glass powder and a photosensitive organic substance.
[0014]
Further, the invention according to claim 5 is that, when forming the partition and the auxiliary partition, a material obtained by mixing a glass powder and a photosensitive organic substance is applied as a first photosensitive paste film on the substrate. A first exposure step of exposing the first layer of the photosensitive paste film with the pattern of the auxiliary partition wall, and thereafter, a mixed paste of glass powder and a photosensitive organic substance was applied as a second layer of the photosensitive paste film Thereafter, a second exposure step of exposing both the first layer and the second layer of the photosensitive paste film in the pattern of the partition wall, and thereafter, exposing the exposed first layer and the second layer of the photosensitive paste film It is formed by a developing step of developing and then a baking step of solidifying the developed first and second photosensitive paste films by heating.
[0015]
Hereinafter, embodiments of the present invention will be described, but embodiments of the present invention are not limited thereto.
[0016]
(Embodiment 1)
The PDP according to the first embodiment of the present invention will be described below with reference to the drawings.
[0017]
The schematic configuration of the PDP according to the first embodiment is the same as the configuration shown in FIG. 7 except for the portions of the partition and the auxiliary partition. Therefore, the features of the first embodiment will be described in detail below. I do.
[0018]
FIG. 1 is a perspective view showing a partition wall and an auxiliary partition wall of the PDP according to the first embodiment (a phosphor layer is not shown). The same components as those shown in FIG. 7 are denoted by the same reference numerals.
[0019]
A feature of the present embodiment is that the auxiliary partition walls 12 on both sides of the partition wall 11 are formed so as to be connected to the partition wall 11 at the positions of the connecting portions 13 shifted from each other. By forming the connecting portion 13 between the partition 11 and the auxiliary partition 12 in such a shape, the partition 11 and the auxiliary partition 12 are solidified by heating such as firing after applying the partition material and the auxiliary partition material, respectively. It has been confirmed that, in the case of being formed by heating and solidifying, the amount of dents generated on the partition walls 11 after heating and solidifying can be reduced. Specifically, in the configuration of the partition 11 and the auxiliary partition 12 as described above, the partition 11 is cut in a direction parallel to the partition 11 and the partition 11 is viewed from the auxiliary partition 12 side in FIG. When the amount of depression of the partition wall 11 at the joint 13 between the partition wall 11 and the auxiliary partition wall 12 is defined as T, the amount of depression T in the configuration according to the first embodiment is 3 μm or less, which is the same as the structure of FIG. It can be seen that the amount of pits T generated is significantly reduced as compared to about 10 μm.
[0020]
Here, when the partition wall 11 and the auxiliary partition wall 12 are configured as described above, the dent amount T of the partition wall 11 after heating and solidification is reduced because the partition wall 11 and the auxiliary partition wall 12 are heated and solidified. It is considered that the concentration of the shrinkage in was reduced. That is, when the partition walls 11 and the auxiliary partition walls 12 have a large volume shrinkage ratio of about 60% during heating and solidification, and the partition walls 11 and the auxiliary partition walls 12 cross each other in a cross shape as shown in the conventional example, In the joint portion 13, the contraction force acts in four directions of the respective contraction directions of the partition wall 11 and the auxiliary partition wall 12, so that the contraction in the height direction increases, and as a result, the partition wall 11 is dented. However, in a configuration in which the connecting portion 13 of the auxiliary partition 12 is shifted with respect to the partition 11 as in the first embodiment, in the connecting portion 13, the auxiliary partition 12 extending in two directions in which the partition 11 extends and in one side. It is considered that the contraction force is applied only from three directions in one direction, and as a result, the contraction in the height direction at the connecting portion 13 is reduced, and the recessed amount T of the partition wall 11 is reduced. That.
[0021]
In addition, as described above, the configuration of the partition walls 11 and the auxiliary partition walls 12 is obtained, for example, by applying a material obtained by mixing the partition wall material and the auxiliary partition wall materials with a glass powder and a photosensitive organic material on the insulator layer 9, By exposing the pattern of the partition walls 11 and the auxiliary partition walls 12 to development and baking, it is possible to form them with high precision.
[0022]
In the PDP described in the first embodiment, it was confirmed that crosstalk did not occur not only in the extending direction of the data electrode 10 but also in a direction obliquely adjacent to the extending direction of the data electrode. This is smaller than 3 μm or less as described above in the configuration of the first embodiment, compared with the conventional example where the dent amount T at the coupling portion 13 of the partition wall 11 is about 10 μm, thereby preventing leakage of plasma discharge. It is thought that it is.
[0023]
As described above, according to the present embodiment, it is possible to suppress the occurrence of crosstalk and realize a PDP with high image quality and high luminance.
[0024]
In the above description, it has been shown that the present embodiment has an effect on volume shrinkage generated in the partition 11 and the auxiliary partition 12 due to heating and solidification when the partition 11 and the auxiliary partition 12 are formed. However, the same effect can be obtained if the partition wall 11 and the auxiliary partition wall 12 are not particularly formed by heating and solidifying but are formed with volume shrinkage.
[0025]
(Embodiment 2)
A PDP according to a second embodiment of the present invention will be described below with reference to the drawings.
[0026]
FIG. 3 is a plan view showing a partition wall and an auxiliary partition wall of the PDP according to the second embodiment. The auxiliary partition 12 has a T-shaped crossing shape at the joint portion 13 with the partition 11, and the auxiliary partition 12 itself has a V-shape, and the V-shape and the inverted V-shape are alternately formed. They are arranged in a repeated state.
[0027]
With the auxiliary partition 12 having such a configuration, in addition to the effect similar to the first embodiment, the auxiliary partition 12 is discontinuous at the joint 13 with the partition 11 and the amount of depression T at the joint 13 of the partition 11 is reduced. Since the shape of each discharge cell 16 is symmetrical with respect to the direction in which the data electrode 10 extends, an effect that a uniform viewing angle characteristic is easily obtained as a PDP can also be obtained.
[0028]
(Embodiment 3)
The PDP according to the third embodiment of the present invention will be described below with reference to the drawings.
[0029]
FIG. 4 is a plan view showing a partition wall and an auxiliary partition wall of the PDP according to the third embodiment. The auxiliary partition 12 is different from the auxiliary partition 12 that is oblique to the partition 11 as shown in FIG. 1, and is configured such that the coupling portion 13 to the partition 11 is orthogonal.
[0030]
By forming the auxiliary partition wall 12 in such a shape, in addition to the effect that the amount of depression T of the partition wall 11 at the joint portion 13 with the partition wall 11 is reduced, the shape of each discharge cell 16 extends the data electrode 10. Symmetry about the direction makes it easier to obtain a uniform viewing angle characteristic as a PDP, and the orthogonality of the partition 11 and the auxiliary partition 12 in the joint 13 improves the uniformity of phosphor application. The effect of doing so can be obtained.
[0031]
(Embodiment 4)
A PDP according to a fourth embodiment of the present invention will be described below with reference to the drawings.
[0032]
FIG. 5 is a plan view showing a partition wall and an auxiliary partition wall of the PDP according to the fourth embodiment. The auxiliary partition 12 has a rectangular wave shape in which the interval between the adjacent partitions 11 is one cycle. In the drawing, W is the effective width of the auxiliary partition 12.
[0033]
By forming the auxiliary partition 12 in such a shape, the depression amount T of the partition 11 at the joint portion 13 with the partition 11 can be reduced, and the effective width W of the auxiliary partition 12 can be increased. Therefore, the effect of reducing crosstalk with the display cells 16 adjacent in the extending direction of the data electrode 10 can be obtained.
[0034]
(Embodiment 5)
A method of manufacturing a PDP according to a fifth embodiment of the present invention will be described below with reference to FIGS.
[0035]
The front plate 1 has a display electrode 5 including a scan electrode 6a and a sustain electrode 6b formed on a substrate 2 made of, for example, glass (PD200: manufactured by Asahi Glass Co., Ltd.) using ITO. Next, after forming the dielectric layer 3 covering the scan electrode 6a and the sustain electrode 6b, a protective film 4 made of MgO is further formed to cover the dielectric layer 3. As described above, the front plate 1 is completed.
[0036]
Next, the production of the back plate 7 will be described. A photosensitive silver paste is applied on a substrate 8 made of glass (for example, PD200: manufactured by Asahi Glass Co., Ltd.) by screen printing, and dried, exposed, developed, and baked to form a striped data electrode 10.
[0037]
Next, a glass paste containing glass powder having a low melting point as a main component is applied by screen printing so as to cover the data electrode 10 in the display portion, and then dried to form the insulator layer 9. Next, a photosensitive paste, which is a material obtained by mixing a low-melting glass powder and a photosensitive organic substance, is formed on the insulator layer 9 by using, for example, a die coater as a first photosensitive paste film serving as the auxiliary partition wall 12. Apply to a thickness of 0.2 mm. The photosensitive paste has approximately the same amount of glass powder containing silicon oxide and boron oxide as main components and an organic component composed of a photosensitive acrylic polymer using γ-butyrolactone as a solvent. After the applied first-layer photosensitive paste is dried or the like as necessary, a first exposure step of exposing the shape of the auxiliary partition wall 12 using a photomask is performed. As described above, the first layer of the photosensitive paste is divided into an exposed area 12a and an unexposed area 12b, as shown in FIG. Here, FIG. 6 is a plan view of the back plate 7. Subsequently, similarly, a photosensitive paste, which is a material obtained by mixing a low-melting glass powder and a photosensitive organic substance, is applied as a second photosensitive paste film to a thickness of, for example, 40 μm. After performing a drying operation or the like as necessary, a second exposure step of exposing the shape of the partition wall 11 using a photomask is performed. As described above, as shown in FIG. 6B, the region 11a is in a state where both the first and second photosensitive paste films are exposed to the shape of the partition wall 11, and the region 12a is partially exposed. Is a state in which only the first photosensitive paste film is exposed to the shape of the auxiliary partition 12. In the other region 12b, both the first and second photosensitive paste films are not exposed at all.
[0038]
Under the above conditions, the first and second layers of the photosensitive paste are developed using an organic alkali aqueous solution, and the thickness of the photosensitive paste film on the first and second layers is about 0.24 mm. 11 parts and 12 parts of auxiliary partition walls having a height of about 0.2 mm of the thickness of the first photosensitive paste film are obtained. The partition walls 11 and the auxiliary partition walls 12 are obtained by heating and solidifying these by heating such as baking. Here, the dent amount T of the partition 11 at the joint 13 between the partition 11 and the auxiliary partition 12 was 3 μm or less. It can be seen that this is greatly reduced because the dent amount T generated in the structure of FIG. 9 shown in the conventional example is about 10 μm.
[0039]
Next, a phosphor paste is applied between adjacent partition walls 11 by a dispenser method using a nozzle having a plurality of discharge ports having a diameter of 0.13 mm, and then fired to form a phosphor layer 14. As described above, the back plate 7 is obtained.
[0040]
The front plate 1 and the rear plate 7 obtained as described above are disposed so as to face each other with the discharge space 15 interposed therebetween so that the display electrode 5 and the data electrode 10 are orthogonal to each other, and the periphery thereof is sealed. For example, a PDP is completed by enclosing a mixed gas of Ne containing 5% of Xe at a total pressure of 66500 Pa, and is further completed by mounting a drive circuit.
[0041]
In the plasma display manufactured by the above-described method for manufacturing a plasma display, crosstalk does not occur not only in the extending direction of the data electrode 10 but also in a direction obliquely adjacent to the extending direction of the data electrode 10. This is because the PDP manufactured according to the second embodiment has a depression amount T of 3 μm or less as described above, whereas the depression amount T at the joint portion 13 of the partition wall 11 is about 10 μm in the conventional example. It is considered that the leakage of the water was prevented.
[0042]
As described above, according to the present embodiment, it is possible to suppress the occurrence of crosstalk and manufacture a PDP with high image quality and high luminance.
[0043]
【The invention's effect】
As described above, according to the PDP of the present invention, the shape change of the partition at the joint between the partition and the auxiliary partition that separates the discharge space, that is, the concave amount can be reduced to improve the shape accuracy, and as a result, It is possible to suppress the occurrence of crosstalk and realize a PDP with high image quality and high luminance.
[Brief description of the drawings]
FIG. 1 is a perspective view showing details of a partition wall and an auxiliary partition wall of a plasma display panel according to a first embodiment of the present invention. FIG. 2 is a diagram showing a definition of a recess amount T of the partition wall. FIG. FIG. 4 is a view showing details of a partition wall and an auxiliary partition wall of a plasma display panel according to Embodiment 2; FIG. 4 is a view showing details of a partition wall and an auxiliary partition wall of a plasma display panel according to Embodiment 3 of the present invention; FIG. 6 is a view showing details of a partition wall and an auxiliary partition wall of a plasma display panel according to a fourth embodiment of the present invention. FIG. 7 is a cross-sectional perspective view showing a schematic structure of a general plasma display panel. FIG. 8 is a view showing a partition wall and an auxiliary partition wall of a conventional plasma display panel. Figure [EXPLANATION OF SYMBOLS] indicating the status of the recess of the partition wall in the perspective view FIG. 9 conventional plasma display panel showing the details
DESCRIPTION OF SYMBOLS 1 Front plate 2 Substrate 7 Back plate 8 Substrate 11 Partition 12 Auxiliary partition 13 Coupling part 15 Discharge space

Claims (5)

A pair of substrates are configured to be disposed so as to face each other such that a discharge space is formed therein, and at least one of the substrates has a plurality of partitions for partitioning the discharge space, and a plurality of partitions coupled to the partitions between the partitions. A plasma display panel comprising: an auxiliary partition, wherein the auxiliary partitions on both sides of the partition are combined with the partition at positions shifted from each other. 2. The plasma display panel according to claim 1, wherein the partition wall material and the auxiliary partition wall are made of a material obtained by mixing a glass powder and a photosensitive organic substance. A method for manufacturing a plasma display panel, comprising a pair of substrates arranged to face each other such that a discharge space is formed therein, wherein at least one of the substrates includes a partition material and an auxiliary partition material. A step of forming a partition and a plurality of auxiliary partitions connected to the partition between the partitions, so that the auxiliary partitions on both sides of the partition are bonded to the partition at positions shifted from each other, and the formed partition and the auxiliary partition. And heating to solidify the plasma display panel. 4. The method for manufacturing a plasma display panel according to claim 3, wherein the partition wall material and the auxiliary partition wall material are a mixture of glass powder and a photosensitive organic substance. When forming the partition and the auxiliary partition, after applying a material obtained by mixing a glass powder and a photosensitive organic material on the substrate as a first layer of the photosensitive paste film, the first layer of the auxiliary partition is patterned. A first exposure step of exposing the photosensitive paste film, and then applying a mixed paste of a glass powder and a photosensitive organic substance as a second photosensitive paste film, and then forming a first paste in a partition pattern. And a second exposure step of exposing the photosensitive paste film of the second layer together, and a developing step of developing the exposed first and second layers of the photosensitive paste film, and then developing A method of manufacturing a plasma display panel formed by a firing step of solidifying the first and second photosensitive paste films by heating.

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