JP3063659B2 - Plasma display panel and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a color plasma display panel, and more particularly to a structure for enhancing contrast.

[0002]

2. Description of the Related Art As a method for colorizing a plasma display panel, a method of exciting a phosphor with ultraviolet rays to obtain visible light of three primary colors is mainly adopted.

When a plasma display panel is colored, in order to prevent adjacent phosphors of different emission colors from emitting light, as shown in FIG. 7, ribs 6 formed by multilayer printing or the like by a thick film printing method are used. A method of preventing color mixing by dividing cells for each color is adopted.

At this time, there is a method of forming a barrier 4 or a rib 6 also serving as a black mask formed on the display surface side by a multilayer printing or the like of a thick film printing method for the purpose of improving display contrast.

Further, when a phosphor is used for colorization, the body color of the phosphor particles is mostly white or light gray, so that the display dots that are emitting light and the non-display dots that are not emitting light are dark and light. And the contrast of the plasma display panel deteriorates. Therefore, in a so-called AC-type plasma display panel in which electrodes are covered with an insulator layer, FIGS. 8 and 9 show a configuration in which a pigment is uniformly dispersed in a transparent film.
-36930) is known. In a so-called DC plasma display panel in which the electrodes are not covered with an insulator layer, the luminance efficiency is increased by forming a color filter according to the emission color of each phosphor as shown in FIG. A method of increasing the contrast without lowering it has been considered.

[0006]

In the so-called AC type in which the electrodes are covered with an insulating layer in the above-mentioned conventional plasma display panel, ribs provided to prevent color mixing of adjacent cells are provided with a base insulating layer when the ribs are fired. There is a problem in that the layer is deformed due to loosening and sometimes cuts.

In the above-mentioned conventional plasma display panel, if a color filter is formed in accordance with each emission color, high-precision alignment with each cell is required, which causes a decrease in yield and an increase in manufacturing cost. To
In some cases, there is a problem that manufacturing itself becomes difficult.

For example, in the structure shown in FIG. 9, since the colors of the color filter 9 are formed so as to be in contact with each other, there is a problem that color mixing is likely to occur and the expected effect cannot be obtained.

As shown in FIG. 10, even when the black matrix 10 is provided between the respective colors, the black matrix 10 does not have a sufficient thickness with respect to the color filter layer 9 so that high alignment is required to prevent color mixing or the like. Accuracy is still required, and it cannot be a fundamental solution.

In the case where the colored dielectric layer 8 as shown in FIG. 8 is painted for each emission color, there is a difference in the thickness of the dielectric layer for each color or the surface smoothness of the dielectric layer. There is a problem that the electrical characteristics are varied due to deterioration of the electrical characteristics and the yield is reduced.

Further, in the plasma display panel shown in FIG. 10, since the transparent electrode 2 is formed on the color filter 9, physical properties such as the surface condition of the color filter and thermal expansion coefficient, and chemical properties such as emission of impurity gas are obtained. However, there is a problem that the mechanical characteristics may greatly affect the yield of the transparent electrode.

Further, in the plasma display panel shown in FIG. 1, since the transparent electrode itself is used as a color filter, the material used for the transparent electrode and the manufacturing method are limited, and the characteristics of the transparent electrode itself are affected and the manufacturing becomes difficult. There is a problem.

[0013]

According to the plasma display panel of the present invention, at least one or more pairs of electrodes arranged substantially in parallel on a substrate having visible light transmittance, and a dielectric material for electrically insulatingly covering the electrodes are provided. Layer and low melting point glass to form each discharge cell and improve display contrast
And a black mask (barrier or rib) mainly composed of an electrode and formed in a direction intersecting the electrode group covered with the dielectric layer.
Low-melting glass made have a separated structure by barrier composed mainly of, little separated dielectric layer on the barrier
At least a part thereof is colored in a predetermined color by a pigment or the like .

[0014]

In the plasma display panel of the present invention, a low melting point glass for forming each discharge cell is used as a main component.
And the dielectric layer covering the electrode group has substantially the same thickness and has a substantially smooth surface.

In the plasma display panel of the present invention, a low melting point glass for forming each discharge cell is used as a main component.
It is characterized in that the dielectric layer covering the electrode group is thicker than the barrier.

In the plasma display panel according to the present invention, a dielectric layer divided into barriers mainly composed of low-melting glass is pressed and formed over the entire surface between the barriers formed in advance by a thick film printing method. Has features.

In the plasma display panel of the present invention, only a pigment or the like is previously coated with a low-melting glass by a thick-film printing method.
It is characterized in that the dielectric layers are collectively indented over the entire surface by a thick film printing method after the indentation is formed in a self-aligned manner between the barriers as the main components .

In the plasma display panel of the present invention, a dielectric layer is formed on the entire surface in advance by a thick film printing method, and then only a pigment or the like is coated with a low melting glass by a thick film printing method.
It is characterized in that it is press-formed in a self-aligned manner between barriers as main components .

Further, in the plasma display panel of the present invention, the dielectric layer colored in a predetermined color is provided with a previously formed low dielectric layer.
After a self-aligned indentation is formed by a thick film printing method into a barrier mainly composed of a melting point glass , an uncolored transparent dielectric layer is simultaneously indented and formed over the entire surface to form a colored dielectric layer having a desired thickness. Is formed.

In the plasma display panel of the present invention, the dielectric layer covering the electrode group has a structure separated by a barrier, that is, the barrier is not formed on the dielectric layer. Since it is not deformed due to loosening, and in some cases, it does not break, a plasma display panel with a high-quality barrier having a good yield can be manufactured.

In the plasma display panel of the present invention, at least a part of the dielectric layer partitioned by the barrier is colored in a predetermined color by a pigment or the like, that is, the color filters of each color are completely separated by the barrier. With such a structure, color mixing does not occur, and a high-quality plasma display panel with color filters with high yield can be manufactured.

Further, in order to use the dielectric layer covering the electrode as a color filter, the surface condition of the color filter accompanying the formation of a transparent electrode on a color filter such as a plasma display panel disclosed in Japanese Patent Application Laid-Open No. 4-111202, The physical characteristics such as thermal expansion coefficient and the chemical characteristics such as emission of impurity gas may greatly affect the yield of the transparent electrode. There is no problem in that the material used and the manufacturing method are limited, which in turn affects the characteristics of the transparent electrode itself and makes manufacturing difficult.

In the plasma display panel of the present invention, the barrier for forming each discharge cell and the dielectric layer covering the electrode group have substantially the same thickness and a substantially smooth surface, or each discharge cell is formed. The feature is that the dielectric layer covering the electrode group is thicker than the barrier for performing the operation. Therefore, the dielectric layer is colored and painted as disclosed in Japanese Patent Application Laid-Open No. 4-36930. There is no problem that the surface smoothing accuracy is degraded, the thickness of the dielectric layer for each color is different, and the electrical characteristics are uneven, which lowers the yield. There is an advantage that the thickness of the layer can be controlled in a self-aligned manner.

Further, in the plasma display panel of the present invention, the dielectric layer divided into barriers is formed by pressing all over the entire surface by a thick film printing method between the barriers formed in advance, thereby forming the dielectric layer divided into barriers. Can be obtained inexpensively and uniformly.

In the plasma display panel of the present invention, only a pigment or the like is preliminarily formed in a self-aligned manner between the barriers by the thick film printing method, and then the dielectric layers are formed by the whole film by the thick film printing method. Therefore, a dielectric layer with no color mixing and high uniformity can be formed by an inexpensive process even if the accuracy of the color separation position is relatively low. Can be realized.

In the plasma display panel of the present invention, after a dielectric layer colored in a predetermined color is formed in a self-aligned manner by a thick film printing method in a rib formed in advance, an uncolored transparent dielectric is formed. In order to form a colored dielectric layer of a desired thickness by pressing the layers all over the entire surface to form,
The feature is that a dielectric layer with no color mixing and high uniformity can be formed by an inexpensive process even if the color separation position accuracy of each color is relatively low, and low cost and mass production of large and high definition plasma display panels. The structure proposed in Japanese Patent Application Laid-Open No. 4-36930 has an effect that it is not necessary to separately apply a highly accurate colored dielectric layer required for the structure.

Japanese Patent Application Laid-Open No. 64-77846 proposes a self-alignment manufacturing method for forming a phosphor in a picture tube. A self-aligned method according to the present invention, which is a method of forming a phosphor pattern by obtaining a phosphor pattern, and a method of forming a color filter by an inexpensive direct forming method in which paste is applied only to necessary portions using a patterned screen. It turns out that this is a completely different proposal.

Japanese Patent Application Laid-Open No. Hei 3-20926 proposes a structure in which a colored dielectric layer is covered with a transparent dielectric layer. However, this is for the back substrate, and the colored dielectric layer is not painted in a plurality of colors. From this, it can be seen that a structure completely different from the present invention, such as a structure that does not cover unevenness and uneven thickness of the surface of the separately-applied dielectric layer and that no barrier is used, is described.

[0030]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIGS. 1 to 3 are views showing a structure of a plasma display panel and a part of a manufacturing process according to the present invention.

As shown in FIG. 1, on a front glass substrate 1,
The scanning electrode 2 is formed of a transparent conductive film formed in a stripe pattern parallel to each other and a thick-film bus electrode laminated on a part of the transparent conductive film. The transparent conductive film used was a tin oxide film formed by a CVD method, so-called Nesa, and the thick bus electrode used was a paste formed mainly by silver by a screen printing method. A barrier 3 is formed on the front glass substrate 1 on which the scanning electrodes 2 are formed so as to cover three colors of RGB. Here, the barrier 3 was formed by a thick film printing method using a black pigment and a paste mainly composed of low melting point glass. A colored dielectric layer 4 is formed at a predetermined position between the barriers 3. Here, a paste obtained by coloring a low-melting glass with a pigment in a predetermined color is used for the colored dielectric layer 4, and a screen plate 10 having an opening slightly narrower than a gap formed by the barrier 3 as shown in FIG. And press-fit into the gap of the barrier 3 in a self-aligned manner. This indentation process is referred to as RGB 3
After repeating each color dielectric layer at a predetermined position, a transparent dielectric layer 5 is formed so as to cover the barrier 3 and the color dielectric layer 4 as shown in FIG. The formed front substrate was obtained. Here, the transparent dielectric layer 5 was formed by repeatedly applying a low-melting point glass paste twice over the entire surface using a solid pattern screen. An MgO protective layer is formed so as to cover the discharge region of the transparent dielectric layer 5. The MgO protective layer was formed by a vapor deposition method.

As shown in FIG. 1, the rear glass substrate 6 on which the write electrodes 7, the ribs 8, and the phosphors 9 are formed and the front substrate 1 are combined and sealed, and a rare gas which can be discharged inside, here A gas mixture of He-Ne-Xe is sealed and hermetically sealed. An AC pulse voltage having a different phase is applied between two adjacent scan electrodes 2, and an address pulse voltage is applied to the data electrode 7 to generate a discharge at a desired position of the scan electrode 2. Ultraviolet light is converted into visible light by the phosphor 9 and transmitted through the transparent dielectric layer 5 and the colored dielectric layer 4 to obtain display light emission.

In the plasma display panel of the present embodiment, since the barrier is not formed on the dielectric layer, the barrier does not become deformed or cut due to the loosening of the underlying dielectric layer during firing, so that high quality with good yield can be obtained. It has become possible to manufacture plasma display panels with various barriers.

Further, in the plasma display panel of this embodiment, since each of the RGB colors of the colored dielectric layer has a structure separated by a barrier, color mixing does not occur and a high-quality plasma display panel with a high-quality color filter is obtained. Manufacturing has become possible.

In the plasma display panel of this embodiment, after a dielectric layer colored in a predetermined color is formed in a barrier by self-alignment by a thick film printing method, the transparent dielectric layer is pressed all over the entire surface. Since it is formed, there is an effect that a dielectric layer with no color mixing and high uniformity can be formed by an inexpensive process even if the accuracy of the color separation position of each color is relatively low.

Next, a second embodiment of the present invention will be described.

4 to 6 show a structure of a plasma display panel and a part of a manufacturing process according to the present invention.

As shown in FIG. 4, on the front glass substrate 1,
The scanning electrode 2 is formed of a transparent conductive film formed in a stripe pattern parallel to each other and a thick-film bus electrode laminated on a part of the transparent conductive film. Transparent conductive film is CVD
A tin oxide film, a so-called nesa, formed by a method was used, and a thick bus electrode formed by a screen printing method using a paste containing silver as a main component was used. A barrier 3 is formed on the front glass substrate 1 on which the scanning electrodes 2 are formed so as to cover three colors of RGB. Here, the barrier 3 was formed by a thick film printing method using a black pigment and a paste mainly composed of low melting point glass.
As shown in FIG. 5, the pigment 11 is formed at a predetermined position between the barriers 3. Here, the pigment 11 is obtained by forming a paste of pigment fine powder of a predetermined color with an organic solvent such as terpineol or butyl carbitol acetate and a binder such as ethyl cellulose. Using a screen plate having a slightly narrower opening, it is pressed into the gap of the predetermined barrier 3 in a self-aligned manner. After the indentation process is repeated at predetermined positions for each of the three color pigments of RGB, as shown in FIG. Then, a transparent dielectric layer 5 was formed thereon to obtain a front substrate on which a predetermined color filter layer was formed. Here, the transparent dielectric layer 5 is coated with a low-melting glass paste while applying a sufficiently high printing pressure using a solid-pattern screen, so that the entire surface is self-aligned with the thickness of the barrier 3 in a lump. The coating was formed by repeating the application twice. An MgO protective layer is formed so as to cover the discharge region of the transparent dielectric layer 5. The MgO protective layer was formed by a vapor deposition method.

As shown in FIG. 4, the rear glass substrate 6 on which the write electrodes 7, the ribs 8, and the phosphors 9 are formed and the front substrate are combined and sealed, and a rare gas capable of being discharged inside is provided.
Here, a mixed gas of He-Ne-Xe is sealed and hermetically sealed. An AC pulse voltage having a different phase is applied between two adjacent scan electrodes 2, and an address pulse voltage is applied to the data electrode 7 to generate a discharge at a desired position of the scan electrode 2. Ultraviolet light to phosphor 9
Then, the light is converted into visible light and transmitted through the transparent dielectric layer 5 and the colored dielectric layer 4 to obtain display light emission.

In the plasma display panel of this embodiment,
Since the pigment layer forming the color filter becomes an extremely thin layer, a filter having a high transmittance can be obtained.

In the plasma display panel of this embodiment, since the transparent dielectric layer 5 is formed in a self-aligned manner so as to have the same thickness as the barrier 3, a panel having good uniformity of the film thickness and excellent electric characteristics can be obtained. There is an advantage that it can be easily created.

[0043]

According to the plasma display panel of the present invention, the barrier is not deformed due to the looseness of the underlying insulating layer during firing, and is not cut off in some cases. Has the effect that it becomes possible to manufacture

Further, in the plasma display panel of the present invention, there is an effect that the color filters of each color do not cause color mixture, and a plasma display panel with a high-quality color filter with good yield can be manufactured.

Further, in the plasma display panel of the present invention, the surface smoothness of the dielectric layer is deteriorated, the thickness of the dielectric layer for each color is varied, and the electrical characteristics are varied, so that the yield is reduced. There is an effect that there is no problem.

The plasma display panel according to the present invention is characterized in that a dielectric layer structure partitioned by barriers can be obtained uniformly at low cost.

The plasma display panel of the present invention is characterized in that a dielectric layer with a color filter having high uniformity without color mixing can be formed by an inexpensive process even if the positional accuracy of each color of RGB is relatively low. Therefore, there is an effect that low cost and mass production of a large high definition plasma display panel can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing the manufacturing process of FIG. 1;

FIG. 3 is a sectional view showing a manufacturing step following FIG. 2;

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing the manufacturing process of FIG. 4;

FIG. 6 is a sectional view showing a manufacturing step following FIG. 5;

FIG. 7 is a sectional view of a conventional example.

FIG. 8 is a sectional view of a conventional example.

FIG. 9 is a sectional view of a conventional example.

FIG. 10 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front glass substrate 2 Scanning electrode 3 Barrier 4 Colored dielectric layer 5 Transparent dielectric layer 6 Back glass substrate 7 Writing electrode 8 Rib 9 Phosphor 10 Screen plate 11 Pigment

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01J 11/02 H01J 9/02 G02B 5/20 101

Claims (7)

(57) [Claims] At least one pair of at least a pair of electrodes arranged substantially in parallel on a substrate having a visible light transmissivity, a dielectric layer electrically insulatingly covering the electrode group, and a plurality of electrodes for forming each discharge cell. A first substrate having a barrier mainly composed of low-melting glass; a second substrate for sealing with the first substrate to form a panel; and a rib separating the second substrate by an appropriate gap. In a plasma display panel, a dielectric layer covering an electrode group of the first substrate has at least a first dielectric layer .
Dielectric that have a separated structure by the barrier formed in the direction, separated in the barrier to cross the electrode group of the substrate
At least a part of the body layer is colored to a predetermined color by pigment etc.
Plasma display panel characterized by being performed . Wherein said plasma display panel of claim 1, wherein the dielectric layer covering the electrodes and the barrier mainly composed of low melting glass and having a thickness approximately the same. 3. A plasma display panel according to claim 1, characterized by having a thicker structure towards the dielectric layer covering the electrode group than a barrier consisting mainly of the low melting point glass. 4. The method for manufacturing a plasma display panel having the structure according to claim 1 , wherein the low melting point is used.
A method for manufacturing a plasma display panel, wherein a dielectric layer divided into barriers containing glass as a main component is formed on a whole surface of a barrier formed in advance by a thick-film printing method between barriers. Wherein said billing method of manufacturing a plasma display panel having the structure of claim 1, 2 or 3, wherein said low-melting glass by a thick film printing method previously only pigments
A method for manufacturing a plasma display panel, characterized in that the dielectric layers are collectively indented over the entire surface by a thick film printing method after the indentation is formed in a self-aligned manner between barriers mainly composed of silicon. 6. A method of manufacturing a plasma display panel having the structure of claim 1, wherein the thickness only pigments after formed on the entire surface at once the dielectric layer in advance by a thick film printing method The low melting point by membrane printing method
A method for manufacturing a plasma display panel, wherein a self-aligned press-fit is formed between barriers mainly composed of glass . 7. A method of manufacturing a plasma display panel having the structure of claim 1, wherein the dielectric layer colored in a predetermined color, the thick film printing method in a rib which is preformed A method for manufacturing a plasma display panel, wherein a non-colored transparent dielectric layer is collectively pressed and formed over the entire surface after the self-aligned press forming, thereby forming a colored dielectric layer having a desired thickness.