JP4092963B2 - Plasma display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plasma display panel (hereinafter referred to as PDP) known as a thin, lightweight display device having a large screen.
[0002]
[Prior art]
In recent years, PDPs are attracting attention as display panels (thin display devices) with excellent visibility, and high brightness, high definition and large screens are being promoted.
[0003]
This PDP is broadly divided into AC type and DC type in terms of driving, and there are two types of discharge types, a surface discharge type and a counter discharge type. From the viewpoint of high definition, large screen, and ease of manufacturing. At present, AC type and surface discharge type PDPs are becoming mainstream.
[0004]
A general structure of this PDP is shown in FIG. FIG. 7 is a cross-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 an MgO deposited film are attached on a transparent and insulating substrate 2 such as glass. The display electrode 5 is a pair of a scan electrode 6a and a sustain electrode 6b. In addition, 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, and the data electrodes 10 on the insulating layer 9 are interposed between the data electrodes 10. In parallel with 10, stripe-shaped partition walls 11 are provided. Further, for the purpose of suppressing image display problems such as crosstalk at the time of high definition, an auxiliary partition wall 12 is provided between the partition walls 11 so as to intersect with the partition wall 11 and the coupling portion 13. FIG. 8 shows details of the partition wall 11 and the auxiliary partition wall 12. Here, the barrier ribs 11 and the auxiliary barrier ribs 12 are formed by, for example, applying a photosensitive paste material, exposing to the shape of predetermined barrier ribs and auxiliary barrier ribs, developing, and then solidifying by baking. can get.
[0005]
A phosphor layer 14 is formed over the surface of the insulator layer 9 and the side surfaces of the partition walls 11 and the auxiliary partition walls 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 electrode 6a, the sustain electrode 6b, and the data electrode 10 are orthogonal to each other. The discharge space 15 is filled with at least one kind of rare gas among helium, neon, argon, and xenon as a discharge gas, and is partitioned by the partition wall 11 and the auxiliary partition wall 12, and the data electrode 10 and the scan electrode 6a. 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 the leakage of ultraviolet rays generated by plasma discharge or discharge and to obtain a PDP having high luminance with respect to the display cell 16 adjacent in the extending direction of the data electrode 10. Become. Further, by forming the auxiliary barrier ribs 12 lower than the barrier ribs 11, it becomes easy to apply and apply phosphors in the manufacturing process, and a PDP having high yield and excellent productivity can be obtained.
[0007]
[Problems to be solved by the invention]
However, even in such a PDP structure, there is a case where image quality deterioration occurs due to crosstalk during image display. A characteristic feature of this crosstalk is that it also occurs in the discharge cell 16 located obliquely 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 recess is generated in the partition wall 11 at the connecting portion 13 between the partition wall 11 and the auxiliary partition wall 12, and this recess As a result, it has been found that the plasma discharge easily leaks from the gap formed between the front plate 1 and the crosstalk easily occurs. This dent is considered to be caused by shrinkage generated in the partition wall 11 and the auxiliary partition wall 12 by firing performed when the partition wall 11 and the auxiliary partition wall 12 are formed.
[0008]
The present invention has been made in view of such a situation, and the occurrence of crosstalk can be suppressed, high image quality and high luminance can be achieved by adopting a structure in which the shape of the partition walls and auxiliary partition walls that partition the discharge space is increased. It aims at realizing PDP.
[0009]
[Means for Solving the Problems]
The PDP of the present invention in order to achieve the above object, a pair of substrates, constituted by opposed to inside the discharge space is formed, one of the substrates either includes a plurality of data electrodes, the A plurality of barrier ribs provided between the plurality of data electrodes for partitioning the discharge space; and a plurality of auxiliary barrier ribs coupled to the barrier ribs between the barrier ribs, wherein the auxiliary barrier ribs on both sides of the barrier ribs are shifted from each other. The auxiliary barrier ribs are combined with the barrier ribs, and are arranged in a state where a symmetrical V-shape and an inverted V-shape are alternately repeated with the extending direction of the data electrode as an axis.
[0010]
Further, PDP of the present invention in order to achieve the above object, a pair of substrates, constituted by opposed to inside the discharge space is formed, one of the substrates either includes a plurality of data electrodes A plurality of barrier ribs provided between the plurality of data electrodes for partitioning the discharge space and a plurality of auxiliary barrier ribs coupled to the barrier ribs between the barrier ribs, wherein the auxiliary barrier ribs on both sides of the barrier ribs are shifted from each other. The auxiliary barrier ribs are coupled with the barrier ribs at a position and have a rectangular wave shape with one cycle between adjacent barrier ribs.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
That is, the invention according to claim 1 of the present invention is configured by arranging a pair of substrates so as to form a discharge space therein, and either one of the substrates includes a plurality of data electrodes, A plurality of barrier ribs provided between the plurality of data electrodes for partitioning the discharge space; and a plurality of auxiliary barrier ribs coupled to the barrier ribs between the barrier ribs, wherein the auxiliary barrier ribs on both sides of the barrier ribs are shifted from each other. In addition, the auxiliary barrier ribs are PDPs that are arranged in such a manner that symmetrical V-shaped and inverted V-shaped shapes are alternately repeated with the extending direction of the data electrode as an axis.
[0012]
According to a second aspect of the present invention, a pair of substrates are arranged so as to face each other so that a discharge space is formed therein, and either one of the substrates includes a plurality of data electrodes and the plurality of data electrodes. A plurality of barrier ribs provided between the data electrodes for partitioning the discharge space; and a plurality of auxiliary barrier ribs coupled to the barrier ribs between the barrier ribs. The auxiliary barrier ribs on both sides of the barrier ribs The auxiliary partition wall is a PDP having a rectangular wave shape with one period between adjacent partition walls.
[0013]
Hereinafter, embodiments of the present invention will be described, but the embodiments of the present invention are not limited thereto.
[0014]
(Embodiment 1)
The PDP according to Embodiment 1 of the present invention will be described below with reference to the drawings.
[0015]
The schematic configuration of the PDP according to the first embodiment is the same as the configuration shown in FIG. 7 except for the partition wall and the auxiliary partition wall. Therefore, the characteristic points of the first embodiment will be described in detail below. To do.
[0016]
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). In addition, the same number is attached | subjected to the same component as the structure shown in FIG.
[0017]
The characteristic point of this embodiment is that the auxiliary partition walls 12 on both sides of the partition wall 11 are formed so as to be coupled to the partition wall 11 at the positions of the coupling portions 13 that are shifted from each other. By forming the coupling portion 13 between the partition wall 11 and the auxiliary partition wall 12 in such a shape, the partition wall 11 and the auxiliary partition wall 12 are solidified by heating such as baking after coating the partition wall material and the auxiliary partition wall material, respectively. In the case of being formed by heating / solidification, it was confirmed that the amount of dents generated on the partition wall 11 can be reduced after heating / solidification. Specifically, in the configuration of the partition wall 11 and the auxiliary partition wall 12 as described above, the partition wall 11 in FIG. 2 is a cross-sectional view of the partition wall 11 viewed from the auxiliary partition wall 12 side by cutting in a direction parallel to the partition wall 11. 9 is defined as T, the amount of recess T in the configuration according to the first embodiment is 3 μm or less. In the structure of FIG. It can be seen that the amount of dent T generated is significantly reduced as compared to about 10 μm.
[0018]
Here, the reason why the dent amount T of the partition wall 11 after heating / solidification is reduced by configuring the partition wall 11 and the auxiliary partition wall 12 as described above is that during the heating / solidification of the partition wall 11 and the auxiliary partition wall 12. This is thought to be due to the reduced concentration of contraction. That is, the volume shrinkage of the partition wall 11 and the auxiliary partition wall 12 in heating and solidification is as large as about 60%, and when the partition wall 11 and the auxiliary partition wall 12 are crossed in a cross shape as shown in the conventional example, In the coupling portion 13, the contraction force acts in the four directions of the contraction direction of each of the partition wall 11 and the auxiliary partition wall 12, so that the shrinkage in the height direction increases, and as a result, the partition wall 11 is recessed. However, in the configuration in which the coupling portion 13 of the auxiliary partition wall 12 is shifted with respect to the partition wall 11 as in the first embodiment, the auxiliary partition wall 12 extends in the two directions in which the partition wall 11 extends and on one side. It is considered that the contraction force acts only from a total of three directions in one direction, and as a result, the shrinkage in the height direction at the connecting portion 13 is reduced, and the dent amount T of the partition wall 11 is reduced. That.
[0019]
In addition, the configuration of the partition wall 11 and the auxiliary partition wall 12 as described above is obtained by, for example, applying a material obtained by mixing the partition wall material and the auxiliary partition wall material on the insulator layer 9 with glass powder and a photosensitive organic material, By exposing the pattern of the partition wall 11 and the auxiliary partition wall 12 to development and baking, the pattern can be formed with high accuracy.
[0020]
In the PDP shown in the first embodiment, it was confirmed that crosstalk does not occur not only in the extending direction of the data electrode 10 but also in the diagonally adjacent direction with respect to the extending direction of the data electrode. This is smaller than 3 μm or less in the configuration of the first embodiment as described above, compared with the case where the dent amount T at the coupling portion 13 of the partition wall 11 is about 10 μm in the conventional example, thereby preventing leakage of plasma discharge. This is probably because of this.
[0021]
As described above, according to the present embodiment, it is possible to suppress the occurrence of crosstalk and realize a high-quality and high-luminance PDP.
[0022]
In the above description, it has been shown that the present embodiment has an effect on the volume shrinkage generated in the partition wall 11 and the auxiliary partition wall 12 by heating and solidification when the partition wall 11 and the auxiliary partition wall 12 are formed. However, the partition wall 11 and the auxiliary partition wall 12 are not particularly limited to those formed by heating and solidification, and similar effects can be obtained as long as they are formed with volume shrinkage.
[0023]
(Embodiment 2)
A PDP according to Embodiment 2 of the present invention will be described below with reference to the drawings.
[0024]
FIG. 3 is a plan view showing the partition and auxiliary partition portions of the PDP according to the second embodiment. The auxiliary partition wall 12 has a T-shaped intersection shape at the joint 13 with the partition wall 11, and the auxiliary partition wall 12 itself has a V-shape. It is arranged in a repeated state.
[0025]
By configuring the auxiliary partition wall 12 in this way, in addition to the effect of being discontinuous at the coupling portion 13 with the partition wall 11 and reducing the dent amount T at the coupling portion 13 of the partition wall 11 as in the first embodiment. Since the shape of each discharge cell 16 is symmetric with respect to the extending direction of the data electrode 10, an effect that a uniform viewing angle characteristic can be easily obtained as a PDP can be obtained.
[0026]
(Embodiment 3)
A PDP according to Embodiment 3 of the present invention will be described below with reference to the drawings.
[0027]
FIG. 4 is a plan view showing the partition and auxiliary partition portions of the PDP according to the third embodiment. Unlike the auxiliary partition wall 12 that is oblique to the partition wall 11 as shown in FIG. 1, the auxiliary partition wall 12 is configured such that the coupling portion 13 to the partition wall 11 is orthogonal.
[0028]
By forming the auxiliary barrier rib 12 in such a shape, in addition to the effect of reducing the recess amount T of the barrier rib 11 at the coupling portion 13 with the barrier rib 11, the shape of each discharge cell 16 is the extension of the data electrode 10. Since the direction is symmetric with respect to the axis, it is easy to obtain uniform viewing angle characteristics as a PDP, and the partition wall 11 and the auxiliary partition wall 12 are orthogonal to each other at the coupling portion 13, thereby improving the uniformity of phosphor coating. The effect of doing can be obtained.
[0029]
(Embodiment 4)
A PDP according to Embodiment 4 of the present invention will be described below with reference to the drawings.
[0030]
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 wall 12 has a rectangular wave shape with one period between adjacent partition walls 11, and W is the effective width of the auxiliary partition wall 12 in the figure.
[0031]
By forming the auxiliary partition wall 12 in such a shape, the recess amount T of the partition wall 11 at the joint 13 with the partition wall 11 can be reduced, and the effective width W as the auxiliary partition wall 12 can be increased. Therefore, the effect that the crosstalk with respect to the display cell 16 adjacent to the extending direction of the data electrode 10 can be reduced is obtained.
[0032]
(Embodiment 5)
A method for manufacturing a PDP according to Embodiment 5 of the present invention will be described below with reference to FIGS.
[0033]
The front plate 1 is formed with a display electrode 5 including a scan electrode 6a and a sustain electrode 6b on a substrate 2 made of glass (PD200: manufactured by Asahi Glass Co., Ltd.) using ITO. Next, after forming dielectric layer 3 covering scan electrode 6a and sustain electrode 6b, protective film 4 made of MgO covering dielectric layer 3 is further formed. Thus, the front plate 1 is completed.
[0034]
Next, production of the back plate 7 will be described. A striped data electrode 10 is formed by applying a photosensitive silver paste onto a substrate 8 made of glass (for example, PD200: manufactured by Asahi Glass Co., Ltd.) by screen printing, and performing drying, exposure, development, and baking.
[0035]
Next, a glass paste mainly composed of low melting point glass powder is applied to the display portion by covering the data electrode 10 by screen printing, followed by drying to form the insulator layer 9. Next, a photosensitive paste which is a material in which a glass powder having a low melting point and a photosensitive organic substance are mixed on the insulator layer 9 is used as a first photosensitive paste film to be the auxiliary partition 12 using, for example, a die coater. Apply to a thickness of 0.2 mm. The photosensitive paste has a glass powder containing substantially the same amounts of silicon oxide and boron oxide as main components and an organic component made of a photosensitive acrylic polymer using γ-butyrolactone as a solvent. The applied first-layer photosensitive paste is dried as necessary, and then a first exposure process is performed in which the shape of the auxiliary partition 12 is exposed using a photomask. As described above, the first-layer photosensitive paste is divided into the exposed region 12a and the unexposed region 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 in which a glass powder having a low melting point and a photosensitive organic material are mixed, is applied as a second-layer photosensitive paste film to a thickness of 40 μm, for example. After performing a dry operation etc. as needed, the 2nd exposure process of exposing to the shape of the partition 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 in the shape of the partition 11, and the region 12a In this state, only the first-layer photosensitive paste film is exposed to the shape of the auxiliary partition 12. In the other region 12b, the first and second photosensitive paste films are not exposed at all.
[0036]
When the first and second layers of the photosensitive paste are developed using an organic alkali aqueous solution in the state as described above, the barrier rib having a thickness of about 0.24 mm of the thickness of the first and second layers of the photosensitive paste film is obtained. 11 parts and 12 parts of auxiliary barrier ribs having a height of about 0.2 mm of the thickness of the first photosensitive paste film are obtained. And the partition 11 and the auxiliary partition 12 are each obtained by the heating and solidification which solidify these by heating, such as baking. Here, the recess amount T of the partition wall 11 at the joint 13 between the partition wall 11 and the auxiliary partition wall 12 was 3 μm or less. It can be seen that the amount of depression T generated in the structure of FIG. 9 shown in the conventional example is about 10 μm, so that it is greatly reduced.
[0037]
Next, a phosphor paste is applied between the 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 the phosphor layer 14. Thus, the back plate 7 is obtained.
[0038]
The front plate 1 and the back plate 7 obtained as described above are arranged opposite to 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 is sealed. For example, a mixed gas of Ne containing 5% Xe is sealed at a total pressure of 66500 Pa to complete a PDP, and further, a PDP is completed by mounting a drive circuit.
[0039]
In the plasma display manufactured by the plasma display manufacturing method described above, the crosstalk does not occur in the direction obliquely adjacent to the extending direction of the data electrode 10 as well as the extending direction of the data electrode 10. This is because the dent amount T at the joint 13 of the partition wall 11 in the conventional example is about 10 μm, and the PDP manufactured according to the second embodiment has a dent amount T of 3 μm or less as described above. It is thought that the leakage of water was prevented.
[0040]
As described above, according to the present embodiment, it is possible to suppress the occurrence of crosstalk and manufacture a high-quality and high-luminance PDP.
[0041]
【The invention's effect】
As described above, according to the PDP of the present invention, it is possible to increase the shape accuracy by reducing the shape change of the barrier ribs at the joint portion between the barrier ribs and the auxiliary barrier ribs that partition the discharge space, that is, the amount of dents. The occurrence of crosstalk can be suppressed, and a high-quality and high-luminance PDP can be realized.
[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 Embodiment 1 of the present invention. FIG. 2 is a diagram showing a definition of a recess amount T of the partition wall. The figure which shows the detail of the part of the partition and auxiliary partition of the plasma display panel by Embodiment 2 [FIG. 4] The figure which shows the detail of the part of the partition and auxiliary partition of the plasma display panel by Embodiment 3 of this invention FIG. The figure which shows the detail of the part of the partition and auxiliary | assistant partition of the plasma display panel by Embodiment 4 of this invention FIG. 6: The formation method of the partition and auxiliary partition in the manufacturing method of the plasma display panel by Embodiment 5 of this invention FIG. 7 is a cross-sectional perspective view showing a schematic structure of a general plasma display panel. FIG. 8 is a partition wall and an auxiliary partition wall of a conventional plasma display panel. Shows the state of the dent of the partition perspective view showing a portion of the detail Figure 9 the conventional in the plasma display panel EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 Front plate 2 Substrate 7 Back plate 8 Substrate 11 Partition 12 Auxiliary partition 13 Joint 15 Discharge space

Claims (2)

A pair of substrates, constituted by opposed to inside the discharge space is formed, either one of the substrates, a plurality of data electrodes, provided between the plurality of data electrodes, partitioning the discharge space A plurality of barrier ribs, and a plurality of auxiliary barrier ribs connected to the barrier ribs between the barrier ribs, the auxiliary barrier ribs on both sides of the barrier ribs being combined with the barrier ribs at positions shifted from each other, and the auxiliary barrier ribs are data A plasma display panel in which symmetrical V-shaped and inverted V-shaped shapes are alternately repeated with the extending direction of the electrode as an axis. A pair of substrates, constituted by opposed to inside the discharge space is formed, either one of the substrates, a plurality of data electrodes, provided between the plurality of data electrodes, partitioning the discharge space A plurality of barrier ribs, and a plurality of auxiliary barrier ribs connected to the barrier ribs between the barrier ribs, the auxiliary barrier ribs on both sides of the barrier ribs being bonded to the barrier ribs at positions shifted from each other, and the auxiliary barrier ribs adjacent to each other. A plasma display panel having a rectangular wave shape with a period between matching partition walls.

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