JP3912166B2 - Plasma display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plasma display panel used for image display on a computer, a television, or the like.
[0002]
[Prior art]
FIG. 8 is a cross-sectional view of a schematic configuration of a conventional AC surface discharge plasma display panel (hereinafter referred to as a panel), and FIG. 9 is a cross-sectional view taken along line XX in FIG.
[0003]
The panel 1 has a configuration in which the substrate 2a of the front plate 2 and the substrate 3a of the back plate 3 are disposed 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 neon (Ne) and argon (Ar) and xenon (Xe) is enclosed.
[0004]
The surface plate 2 is arranged in parallel on a transparent and insulating substrate 2a, such as glass, so that the scanning electrode 6 and the sustain electrode 7 are separated from each other by a discharge gap (Dy) and are paired with each other. A dielectric layer 8 and a protective film 9 are formed thereon. Scan electrode 6 and sustain electrode 7 have metal electrodes 6b and 7b for lowering the line resistance formed on transparent electrodes 6a and 7a as bus electrodes, respectively.
[0005]
The back plate 3 has a plurality of strip-like 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. Band-shaped barrier ribs 4 for separating the electrodes 10 one by one and forming the discharge space 5 are provided between the data electrodes 10. A phosphor 11 is formed on the substrate 3 a, the data electrode 10, and the side walls of the partition 4.
[0006]
The image of the panel 1 is viewed from the surface plate 2 side, and the phosphor 11 is excited by ultraviolet rays generated by the discharge between the scan electrode 6 and the sustain electrode 7 in the discharge space 5, The visible light from the phosphor 11 is displayed and emitted as one pixel. When the partition 4 is a striped panel, the distance between the scan electrode 6 or the sustain electrode 7 and the scan electrode 6 or the sustain electrode 7 constituting the adjacent pixel, that is, the so-called inter-pixel distance is the interference of discharge between pixels. In order to prevent erroneous discharge caused by the discharge gap, it is necessary to take several times wider than the discharge gap (Dy).
[0007]
Here, the demand for higher definition is increasing for the panel 1, and in order to respond to this, it is necessary to reduce the inter-pixel distance of the panel 1 as compared with the conventional case. Therefore, it is also necessary to reduce the discharge gap to prevent erroneous discharge. However, the prevention of erroneous discharge by reducing the discharge gap creates a new problem of lowering the panel brightness, so high definition and high brightness can be achieved simultaneously by reducing only the inter-pixel distance while maintaining the discharge gap. There is a need for a configuration to do this.
[0008]
As one of the above-described configurations, there is a configuration in which auxiliary barrier ribs are provided at corresponding positions between adjacent discharge spaces 5 to reduce the inter-pixel distance while preventing charge interference between the discharge spaces 5 due to discharge. However, in this configuration, when the discharge space 5 is completely divided for each pixel, unnecessary gas in the discharge space 5 is removed in an exhaust baking process for the purpose of cleaning the discharge space 5 performed after the panel 1 is sealed. Since the discharge outside the panel 1 becomes difficult, the auxiliary partition wall 12 having a structure as shown in FIG. 10 can prevent an erroneous discharge between pixels and can efficiently exhaust the discharge space 5 efficiently. Proposed.
[0009]
The details of the auxiliary partition 12 will be described with reference to FIG. The same parts as those in FIGS. 8 and 9 are denoted by the same reference numerals. The auxiliary barrier ribs 12 are formed on the substrate 3a of the back plate 3, and the phosphor 11 is coated on the barrier ribs 4, the side surfaces of the auxiliary barrier ribs 12, and the substrate 3a.
[0010]
The auxiliary partition wall 12 is provided separately from the partition wall 4, and a gap region 13 is formed between the auxiliary partition wall 12 and the partition wall 4. The shape of the auxiliary partition 12 is the narrowest at the center, and the width increases as it approaches the partition 4 on both sides.
[0011]
By forming the auxiliary barrier 12 in such a shape, it is possible to minimize the reduction of the discharge space 5 due to the presence of the auxiliary barrier 12 while maintaining the strength of the auxiliary barrier 12, and the gap region 13 serves as the discharge space. Since it functions as an exhaust hole when exhausting in the discharge space 5, the discharge space 5 can be exhausted efficiently and sufficiently.
[0012]
Therefore, the gap region 13 is required to be formed so that the exhaust resistance generated during exhaust in the discharge space 5 is as small as possible.
[0013]
[Problems to be solved by the invention]
In the shape of the auxiliary partition wall 12 shown in FIG. 10, the shape of the portion facing the partition wall 4 is a surface in the shape of the cross section of the auxiliary partition wall 12 parallel to the substrate 3 a, so the exhaust resistance generated in the gap region 13 is It becomes large, and it is difficult to exhaust the discharge space 5 efficiently and sufficiently. In such a case, unnecessary gas remains in the discharge space 5, and the image display characteristics of the panel 1 are significantly deteriorated.
[0014]
The present invention solves the above-described problems, and realizes a panel that can prevent erroneous discharge between adjacent discharge spaces and that can efficiently and sufficiently exhaust the discharge spaces. Objective.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, a plasma display panel according to the present invention is provided with two substrates facing each other so as to form a discharge space with a plurality of barrier ribs interposed between the barrier ribs and the barrier ribs. A plurality of auxiliary barrier ribs, the auxiliary barrier ribs having a cross section parallel to the substrate, provided with a recess in a portion facing the barrier rib, and the corners of the recess are pointed or rounded It is configured .
[0016]
Accordingly, erroneous discharge between adjacent discharge spaces can be prevented, and exhaust in the discharge spaces can be efficiently and sufficiently performed, thereby realizing a panel with high definition and high image display characteristics.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, the panel according to the first embodiment of the present invention will be described.
[0018]
FIG. 1 shows a perspective view of a schematic panel configuration according to the first embodiment of the present invention. 1, parts similar to those of the conventional panel configuration shown in FIGS. 8, 9 and 10 are designated by the same reference numerals and description thereof is omitted.
[0019]
The panel has a configuration in which a substrate of the front plate and a substrate 3a of the back plate 3 are arranged to face each other so as to form a discharge space 5 with a plurality of partition walls 4 sandwiched therebetween, and helium (He), neon in the discharge space 5 A mixed gas of at least one of (Ne) and argon (Ar) and xenon (Xe) is enclosed.
[0020]
The surface plate is arranged in parallel on a transparent and insulating substrate such as glass or the like so that the band-shaped scanning electrode 6 and the sustain electrode 7 are separated from each other by a discharge gap and are paired with each other. A dielectric layer and a protective film are formed thereon.
[0021]
Each of the scan electrode 6 and the sustain electrode 7 has a configuration in which a metal electrode for lowering the line resistance is formed on the transparent electrode as a bus electrode.
[0022]
The back plate 3 has a plurality of strip-like 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. Band-shaped barrier ribs 4 for separating the electrodes 10 one by one and forming the discharge space 5 are provided between the data electrodes 10. An auxiliary partition wall 14 is provided between the partition walls 4 separately from the partition wall 4.
[0023]
As shown in FIG. 2, the shape of the auxiliary partition wall 14 and the partition wall 4 in a cross section parallel to the substrate 3 a, the shape of the auxiliary partition wall 14 is a recess 15 in a portion facing the partition wall 4 in the cross section parallel to the substrate 3 a. It is to have. As a result, the gap region 13 formed by the auxiliary partition wall 14 and the partition wall 4 is smaller than the case shown in FIG.
[0024]
The phosphor 11 is formed over, for example, the substrate 3 a, the data electrode 10, and the side walls of the partition 4.
[0025]
The image displayed on the panel is viewed 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, and visible light from the phosphor 11 is displayed and emitted as one pixel of display light emission.
[0026]
Here, since the auxiliary barrier ribs 14 are provided between the barrier ribs 4, when increasing the definition of the panel, even if the discharge gap is kept as it is and only the distance between the pixels is reduced, the erroneous discharge is greatly caused between the adjacent discharge spaces 5. Therefore, high definition and high luminance can be realized simultaneously as a panel. Further, since the auxiliary partition wall 14 has the recess 15, the gap region 13 formed by the partition wall 4 and the auxiliary partition wall 14 is smaller than that in the conventional configuration as shown in FIG. In the exhaust baking process, when the gap region 13 functions as an exhaust hole for exhausting the inside of the discharge space 5, the generated exhaust resistance is reduced, and as a result, the exhaust in the discharge space 5 is efficiently and sufficiently performed. Therefore, the stability and reliability of the image display characteristics are improved.
[0027]
In addition, there are charged particles that pass through the gap region 13 between the auxiliary barrier ribs 14 and the barrier ribs 4 and flow out to the adjacent discharge space 5, which causes the adjacent barrier ribs 4 to exist between adjacent pixels. In some cases, erroneous discharge may occur. However, according to the present embodiment, the recessed portion 15 of the auxiliary partition wall 14 can trap charged particles at that portion, and as a result, between adjacent pixels. It is also possible to suppress erroneous discharge due to charged particles, and therefore it is possible to more reliably prevent erroneous discharge between adjacent pixels.
[0028]
Here, in order to reliably obtain the effect as the exhaust hole by the gap region 13, it is required 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 wall 12 having the shape as shown in FIG. 1, it is difficult to form the auxiliary partition wall 12 and the partition wall 4 in a well-separated manner, and the gap region 13 is sufficiently formed in a state where the auxiliary partition wall 12 and the partition wall 4 are connected. In the case of the auxiliary partition wall 14 having the shape as in the present embodiment, the gap region 13 between the auxiliary partition wall 14 and the partition wall 4 is not shown in FIG. Compared to the conventional configuration as shown, the pattern omission is improved. As a result, the occurrence of pattern defects can be greatly reduced.
[0029]
1 shows a state in which the phosphor 11 is not applied to the auxiliary barrier 14 at all. However, the effect of the present invention is not limited to such a state. For example, as shown in FIG. 3, as a method for forming the phosphor 11, a line jet method in which the phosphor 11 is applied between the partition walls 4 using a nozzle 15 is used to assist the phosphor 11 in addition to the side surfaces of the partition walls 4 and the upper surface of the substrate 3a. The partition wall 14 may be formed so as to cover it, and such a formation method is more mass-productive, so that the cost can be reduced. However, if the auxiliary partition wall 12 has a shape as shown in FIG. 10 and the gap area 13 is large, the gap area 13 is clogged by the phosphor 11, and the gap area 13 does not function as an exhaust hole. The applied phosphor 11 rides on the barrier ribs 4 and the phosphor 11 is mixed into the adjacent pixel lines of different colors, resulting in a mixed color. However, the auxiliary barrier rib 14 is used in the present embodiment. If the gap region 13 is very small due to the presence of the recess 15 in such a shape, the occurrence of the problems associated with the application of the phosphor 11 as described above is greatly reduced.
[0030]
As described above, according to the present embodiment, it is possible to realize a panel that can reliably prevent erroneous discharge between adjacent discharge spaces and can efficiently and sufficiently exhaust the discharge spaces. Is possible.
[0031]
The shape of the auxiliary partition 14 for obtaining the effect of the present invention is not limited to that shown in FIG. 1, but may be that shown in FIGS. 4 (a) to 4 (c). Here, FIG. 4 is a cross-sectional view of the auxiliary partition wall 14 in a plane parallel to the substrate (not shown) surface of the back plate. The auxiliary partition 14 shown in FIGS. 4 (a) and 4 (b) has a shape in which the corner 15a of the recess 15 is pointed, and the gap region 13 that causes exhaust resistance can be minimized. Therefore, it is possible to maximize the effect of the present invention. In particular, the shape of the auxiliary partition 14 shown in FIG. 4B is a shape that can secure a large area of the recess 15, and can enhance the effect of trapping charged particles. Further, the auxiliary partition wall 14 shown in FIG. 4C is a cross-sectional shape in a plane parallel to the substrate (not shown) surface of the back plate, and the corner 15a of the recess 15 has a rounded shape. Since the shape is higher in mechanical strength than in the case of being pointed, it is possible to reduce the occurrence of problems such as “chips / shape variations” of the auxiliary partition wall 14 during and after the formation of the auxiliary partition wall 14.
[0032]
Further, by making the heights of the partition walls 4 and the auxiliary partition walls 14 the same, the rib forming method using the photosensitive glass paste can be formed by one exposure and development, and the cost can be reduced.
[0033]
(Second Embodiment)
Hereinafter, the panel in the 2nd Embodiment of this invention is demonstrated.
[0034]
FIG. 5 shows a cross section of the auxiliary partition wall 14 according to the second embodiment of the present invention in parallel with the substrate 3a, and other configurations are the same as those of the first embodiment of the present invention. It is omitted in the description.
[0035]
As shown in FIG. 5, the auxiliary partition wall 14 of the present embodiment is provided independently of the partition wall 4, and in the shape of a cross section parallel to the substrate 3 a, a recess 15 is formed in a portion facing the partition wall 4. In addition, the width of the auxiliary partition wall 14 in a cross section parallel to the substrate 3 a becomes narrower as it approaches the partition wall 4.
[0036]
By forming the auxiliary partition wall 14 in such a shape, the facing section with the partition wall 4 is shorter than in the first embodiment, and therefore, the same effect as in the first embodiment is obtained. However, it is possible to further reduce the resistance when exhausting inside the panel.
[0037]
Also in the present embodiment, by making the heights of the partition walls 4 and the auxiliary partition walls 14 the same, the rib forming method using the photosensitive glass paste can be formed by one exposure and development, thereby reducing the cost. Is possible.
[0038]
(Third embodiment)
Hereinafter, the panel in the 3rd Embodiment of this invention is demonstrated.
[0039]
FIG. 6 shows a cross section of the auxiliary partition wall 14 according to the third embodiment of the present invention parallel to the substrate 3a, and the other configuration is the same as that of the first embodiment of the present invention. It is omitted in the description.
[0040]
As shown in FIG. 6, the auxiliary partition wall 14 of the present embodiment is provided independently of the partition wall 4, and in the shape of a cross section parallel to the substrate 3 a, a recess 15 is formed in a portion facing the partition wall 4. In addition, the width in the cross section parallel to the substrate 3a is a shape that becomes narrow at the center between the partition walls 4.
[0041]
By making the auxiliary barrier ribs 14 in such a shape, the discharge space 5 can be made wider than in the first embodiment, so that the same effect as in the first embodiment can be obtained, It becomes possible to further increase the brightness of the panel.
[0042]
Also in the present embodiment, by making the height of the partition 4 and the auxiliary partition 14 the same, it can be formed by one exposure and development, and the cost of the panel can be reduced.
[0043]
Here, as shown in FIG. 7, it is obvious that the auxiliary partition wall 14 having a shape obtained by combining the second embodiment and the third embodiment is also one aspect of the present invention.
[0044]
In the above description of the first to third embodiments, the auxiliary partition wall 14 and the partition wall 4 are directly formed on the substrate 3a. However, the present invention is particularly limited to this configuration. Instead, for example, even when the insulating layer is present on the substrate 3a on which the data electrode 10 is formed and the partition 4 and the auxiliary partition 14 are formed on the insulating layer, the effects of the present invention can be obtained similarly. It is done.
[0045]
In the above embodiment, the structure in which one concave portion 15 is provided on each of the opposing surfaces of the auxiliary partition wall 14 and the partition wall 4 is shown. Of course, the same structure may be provided with two or more concave portions. An effect can be obtained.
[0046]
In the above description, the AC surface discharge type is described as an example. However, the present invention is not limited to this, and the same effect can be obtained in other panels such as a DC type and a counter discharge type.
[0047]
【The invention's effect】
As described above, according to the present invention, it is possible to realize a panel that can prevent erroneous discharge between adjacent discharge spaces and that can efficiently and sufficiently exhaust the discharge spaces.
[Brief description of the 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 diagram showing auxiliary partitions of the plasma display panel according to the first embodiment of the present invention. FIG. 4 is a perspective view showing the concept of phosphor paste application by the line jet method. FIGS. 4A to 4C are views showing other examples of auxiliary barrier ribs according to the present invention. FIG. 5 is a second embodiment of the present invention. FIG. 6 is a diagram showing an auxiliary barrier rib of a plasma display panel according to a third embodiment of the present invention. FIG. 7 is another example of an auxiliary barrier rib according to the present invention. FIG. 8 is a cross-sectional view of the main part showing the configuration of a conventional plasma display panel. FIG. 9 is a cross-sectional view taken along line XX of FIG. Perspective view showing EXPLANATION OF REFERENCE NUMERALS
1 Panel 2 Front plate 2a Substrate 3 Back plate 3a Substrate 4 Partition 5 Discharge space 11 Phosphor 13 Gap region 14 Auxiliary partition 15 Recess 15a Corner of recess

Claims (2)

There are two substrates disposed opposite to each other so as to form a discharge space with a plurality of barrier ribs interposed therebetween, and a plurality of auxiliary barrier ribs provided separately from the barrier ribs between the barrier ribs, the auxiliary barrier ribs being parallel to the substrate A plasma display panel in which a recess is provided in a portion facing a partition wall in a shape in cross section, and a corner of the recess is sharpened . There are two substrates arranged opposite to each other so as to form a discharge space with a plurality of barrier ribs interposed therebetween, and a plurality of auxiliary barrier ribs provided separately from the barrier ribs between the barrier ribs, the auxiliary barrier ribs being parallel to the substrate A plasma display panel in which a recess is provided in a portion facing a partition wall in a cross-sectional shape, and a corner of the recess is rounded .

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