JPH10321148A - Plasma display panel - Google Patents

Abstract

(57) [Problem] To provide a plasma display panel having a partition shape capable of increasing luminance when a phosphor emits light. A partition formed on a back plate in a direction parallel to an address electrode, and an auxiliary partition formed on a back plate in a direction parallel to a bus electrode, the discharge space specified by the address electrode and the bus electrode is formed. Plasma display panel separated from other discharge spaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of a plasma display panel. In particular, the present invention relates to a shape of a partition formed on a back plate of a plasma display panel.

[0002]

2. Description of the Related Art In a plasma display panel for performing color display (hereinafter, abbreviated as "PDP"), a plurality of partitions are formed on a back plate in parallel lines. A fluorescent screen is provided on the address electrode between the partitions. The phosphor screen between the partition walls is filled with one of phosphor materials that emit light of each of RGB colors,
A structure in which a large number of sets of three stripe-shaped fluorescent screens of each of the GB colors are arranged.

FIG. 8 shows an example of a configuration of an AC type PDP, in which a front plate and a back plate are separated from each other, and two glass substrates 101 and 102 are arranged in parallel and opposed to each other. And a glass substrate 10 serving as a back plate.
2 are held at regular intervals by partition walls 103 provided in parallel with each other. Glass substrate 101 serving as a front plate
On the back plate side of the transparent electrode 104 as a sustaining electrode.
And a metal electrode 105 serving as a bus electrode are formed in parallel with each other, and the
06 is formed thereon, and a protective layer (MgO
Layer) is formed. On the front plate side of the glass substrate 102 serving as a back plate, address electrodes 108 are formed between the partition walls 103 so as to be orthogonal to the composite electrode and parallel to each other. The fluorescent screen 109 is provided so as to cover the bottom surface. Further, as shown in FIG. 9, a glass substrate 102 serving as a back plate is provided.
After forming a base layer 110 made of a dielectric, an address electrode 108 is provided, a dielectric layer 106 ′ is further laminated thereon, and then a partition 103 and a fluorescent screen 109 are provided. A rare gas containing mainly neon and containing xenon is sealed between the front plate and the back plate.

The AC type PDP is a surface discharge type, and has a structure in which, after writing is performed by an address electrode, an AC voltage is applied to a composite electrode on the front panel to discharge by an electric field generated in a space. In this case, since the alternating current is applied, the direction of the electric field changes according to the frequency. It should be noted that the DC type PDP is different in that the electrodes have a structure not covered with a dielectric layer, but the discharge phenomenon is the same. Then, the fluorescent screen 109 emits light by ultraviolet rays generated by the discharge, and the light transmitted through the front plate can be visually recognized by an observer.

[0005]

In such a PDP, it is one of the important problems to increase the brightness when the phosphor screen is illuminated. Various methods have been proposed to increase the luminance, but there is no definitive solution, and the luminance is gradually increased by the accumulation of these methods. Increasing the light emitting area of the phosphor screen generally improves the luminous efficiency due to, for example, efficient operation of ultraviolet light on the phosphor screen, leading to an increase in luminance.
However, as shown in FIGS. 8 and 9, the fluorescent screen 109 is provided so as to cover the wall surface of the partition 103 and the cell bottom, and the fluorescent screen 109 is restricted by the shape of the wall surface of the partition 103 and the cell bottom. That is, the surface of the fluorescent screen 109 is
3 has a simple shape determined by the shape of the wall surface and the bottom surface of the cell, thereby restricting the light emitting area. Therefore, an object of the present invention is to provide a plasma display panel having a partition shape capable of increasing the luminance when the fluorescent screen emits light.

[0006]

The above objects are achieved by the present invention described below. That is, the present invention provides a “discharge specified by an address electrode and a bus electrode having a partition formed on the back plate in a direction parallel to the address electrode, and an auxiliary partition formed on the back plate in a direction parallel to the bus electrode. Plasma display panel that separates space from other discharge spaces "
It is. According to the present invention, the light-emitting area of the phosphor screen is increased by surrounding the four sides of the display cell portion with the partition and the auxiliary partition to form the surface of the auxiliary partition. Therefore, since the ultraviolet rays efficiently act on the phosphor screen, the luminance can be increased. In addition, the auxiliary partition can prevent the discharge and the ultraviolet rays generated by the discharge from leaking to the adjacent display cell portion in the address electrode direction.

Further, the present invention provides a "plasma display panel in which two ridges in a cross section in a direction parallel to an address electrode of the auxiliary partition wall are widened toward the back plate."
It is. ADVANTAGE OF THE INVENTION According to this invention, the ratio of the light which goes to a front plate among the light emitted by the fluorescent screen of an auxiliary partition wall and emits increases, and apparent brightness improves further. Further, a large bonding area between the auxiliary partition and the back plate can be obtained, and the entire strength including the partition as well as the auxiliary partition can be obtained. as a result,
The width of the partition and the auxiliary partition can be reduced, the discharge volume in the display cell portion can be increased, and the discharge efficiency can be further improved. Further, since the pixel pitch can be reduced, high definition can be achieved. Further, the present invention provides that “the height of the auxiliary partition is 1 / the height of the partition.
Plasma Display Panel 2-5 / 6 Height High "
It is. According to the present invention, the height of the auxiliary partition is lower than the height of the partition, and is ２〜 to ／ of the height of the partition. The same effect as described above can be obtained with the height of the auxiliary partition. In addition, since the height of the auxiliary partition wall is smaller than the height of the partition wall, formation of the phosphor screen in the manufacturing process becomes easy.

[0008]

Next, the present invention will be described with reference to embodiments. 1 and 2 are perspective views showing an example of the shape of the partition wall in the PDP of the present invention. 1 and 2, reference numerals 1a, 1b, 1c denote partition walls, 2a, 2b, 2c, 2
d, 4a, 4b, 4c, and 4d are auxiliary partition walls, and 3 is a back plate. Although a large number of partition walls and auxiliary partition walls are actually formed on the back plate 3, FIGS. 1 and 2 show only three partition walls and four auxiliary partition walls as representatives.

The partitions 1a, 1b, 1c are formed on the back plate 3 in a direction parallel to the address electrodes (not shown). The address electrode is provided on the surface of the back plate 3 on the side of the partition between the partitions. 1 and 2, the partition walls 1a, 1b, 1c
Has a trapezoidal cross section in a direction perpendicular to the direction in which the partition extends, but the cross-sectional shape is not limited to the trapezoid. It may be rectangular, and each side of the cross section may not be a straight line. The auxiliary partition walls 2a, 2b, 2c, 2d, 4a, 4b, 4c, 4d
It is formed on the back plate in a direction parallel to a bus electrode (not shown). In FIG. 1, the cross section of the auxiliary partition walls 2a, 2b, 2c, 2d in the direction parallel to the address electrodes has a trapezoidal or nearly rectangular shape. In FIG. 2, two ridges in the cross section of the auxiliary partition walls 4 a, 4 b, 4 c, 4 d in a direction parallel to the address electrodes have a shape expanding toward the surface of the back plate 3. These partitions and auxiliary partitions separate a discharge space specified by the address electrode and the bus electrode from other discharge spaces.

As shown in FIG. 1 and FIG. 2, the four sides of the display cell portion are surrounded by the partition and the auxiliary partition to form the surface of the auxiliary partition, so that the light emission of the phosphor screen formed on the partition and the auxiliary partition. The area becomes larger as compared with the case where the auxiliary partition does not exist. Therefore, high luminance is obtained because the ultraviolet rays efficiently act on the phosphor screen. In addition, these auxiliary barrier ribs have the function of preventing or reducing the leakage of the discharge and the ultraviolet rays generated by the discharge to the display cell portion on the side of the adjacent bus electrode. Therefore, light emission of the display cell portion can be controlled independently, and a high-quality display image can be obtained.

In the example of FIG. 2, as described above, the auxiliary partition 4
The two ridges in the cross section in the direction parallel to the address electrodes a, 4b, 4c, and 4d have shapes that extend toward the surface of the back plate. In this case, of the light emitted from the phosphor screen of the auxiliary partition wall and emitted, the ratio of the light toward the front plate is increased, and the apparent brightness is further improved. Further, a large bonding area between the auxiliary partition and the back plate can be obtained, and the entire structural strength including not only the auxiliary partition but also the partition can be obtained. As a result, the width of the partition and the auxiliary partition can be reduced, the discharge volume in the display cell portion can be increased, and the discharge efficiency can be further improved. Further, since the pixel pitch can be reduced, high definition can be achieved.

As shown in FIGS. 1 and 2, the auxiliary partition walls 2a, 2b, 2c, 2d, 4a, 4b, 4c, 4d are usually provided.
Is lower than the height of the partition walls 1a, 1b, 1c.
When the height of the auxiliary partition wall is 1/2 to 5/6 of the height of the partition wall, the ultraviolet rays efficiently act on the phosphor screen, so that a high luminance can be obtained and the display cell portion on the side of the adjacent bus electrode is provided. On the other hand, the effect of preventing discharge from leaking can be obtained. Further, by making the height of the auxiliary partition wall lower than the height of the partition wall and setting the height of the partition wall to 1/2 to 5/6, the formation of the phosphor screen becomes easy in the manufacturing process.

Next, an example of a method for forming a partition and an auxiliary partition in the present invention will be described. 3 is a cross-sectional view of a base film having a concave pattern formed on the surface, FIG. 4 is a cross-sectional view of a transfer sheet for forming a partition, and FIGS. 5 to 6 are transfer sheets shown in FIG. FIG. 3 is a diagram for explaining a pattern forming method using the method. This pattern forming method can be applied not only to the partition walls in the PDP but also to the underlying layer,
Although it can be applied to form an electrode, a dielectric layer, and other patterns, a method of forming a partition will be described here. 3 to 6, reference numeral 11 denotes a base film, 12 denotes a concave pattern portion, 13 denotes an ink layer, and 14 denotes a transfer target. The base film 11 is not affected by the solvent in the ink layer, and it is necessary that the base film 11 does not shrink and stretch due to heat treatment during the process. A plastic film such as polyethylene terephthalate, a sheet, or a metal foil such as aluminum or copper is used. You. For example, the film thickness is 1
Those having a size of from 00 μm to 300 μm are suitable.

The concave pattern portion has a shape corresponding to the partition pattern formed using the above-mentioned transfer sheet. That is, it has a concave shape which is a shape that fits the convex shape of the partition wall shown in FIGS. Such a concave portion can be formed by embossing, etching, or the like the surface of the base film, or by molding so as to have a concave pattern on the surface. Preferably, a concave pattern is formed by forming a convex pattern (fitting shape) on the base film using a curable resin using an intaglio roller.

The concave pattern forming apparatus will be described with reference to FIG. In FIG. 7, 11 is a base film, and 12 is a base film.
Is a concave pattern portion, 33 is a roller intaglio, 34 is a concave portion, 3
5 is a resin supply device, 36 is a curable resin, 37 is a curing device, 39 is a peeling roller, 40 is a coating section, 44 is a paper feeding take-up roll, 45 is a paper feeding side re-roller, 47 is a compensator roller, and 48 is a compensator roller. Is a paper take-up roll. The concave pattern forming apparatus includes a paper feed take-up roll 44 that supplies the base film 11, a paper feed side re-roller 45, a compensator roller 47, and a paper discharge take-up roll 48. The coating unit 40 coats the roller intaglio 33 with a pressing roller 32 that presses the base film 11, a roller intaglio 33 in which a concave portion 34 is engraved, and a curable resin 36 (at this time, an uncured liquid). It comprises a resin supply device 35 for processing, a curing device 37 for curing and solidifying the liquid curable resin 36 filled in the concave portion 34 of the roller intaglio, and a peeling roller 39.

In the coating section 40, the base film 11 is pressed by the pressing roller 32, and the base film 11 is pressed.
Is in close contact with the plate surface of the roller intaglio 33 at a position between the pressing roller 32 and the peeling roller 39 via the curable resin 36 applied by the resin supply device. The roller intaglio 33 is driven by a driving device (not shown) driven by an electric motor or the like to adjust the feed speed of the base film 11 and the roller intaglio 33.
Are rotated so that the peripheral speeds of the rollers are synchronized, and the curable resin 36 filled in the concave portions 34 of the roller intaglio between the roller intaglio 33 and the base film 11 closely contacted with the roller intaglio 33 remains as it is. Is cured and solidified by a curing device 37 to adhere to the base film 11, and then the base film 1 is separated by a peeling roller 39.
1 is peeled from the roller intaglio 33, and the base film 11
A concave pattern part 12 is formed on the upper part. The pressing roller 32 only needs to be able to press the base film 11 against the plate surface of the roller intaglio, but usually has a diameter of about 50 to 300 mm,
It is made by coating silicone rubber, natural rubber, etc. around a metal shaft center.

The curing device 37 can be appropriately selected according to the type of the curable resin, and includes a device for irradiating radiation having energy for crosslinking and polymerizing the curable resin among electromagnetic waves or charged particle beams. Can be. Those that can be industrially used as such radiation are infrared rays,
There are visible light, ultraviolet light, electron beam and the like, and other electromagnetic waves such as microwaves and X-rays can also be used. In FIG. 7, reference numeral 38 denotes a reflecting mirror for efficiently irradiating the roller intaglio with radiation emitted from the radiation source. Also, the curing device 37
Two rollers are provided for one roller intaglio, and the sources S1 and S2 of these two curing devices have an angle S1OS2 connecting the center O of the roller intaglio with an angle range of 70 to 110 °, Preferably, the angle is set to 90 °.

The roller intaglio plate 33 may be provided with a predetermined concave portion 34 by a method such as electronic engraving, etching, mill pressing, and electroforming. The material of the roller intaglio is a metal such as copper or iron, the surface of which is plated with chromium, ceramics such as glass or quartz, or synthetic resins such as acrylic or silicon resin. Further, a sheet obtained by forming a pattern on the sheet with an ionizing radiation curable resin, a thermosetting resin, or the like, and winding the sheet around a roller with the pattern surface as an outer surface can be used. The size of the roller intaglio is not particularly limited, but is usually 150 to 1000 mm in diameter and 300 to 300 mm in line width.
It is about 2000 mm. The size and shape of the concave portion 34 formed in the roller intaglio are set corresponding to the pattern portion.
As the base film 11, a film that does not hinder the radiation from reaching the curable resin is used.

As the curable resin, a known ionizing radiation curable resin or a thermosetting resin can be used. As the ionizing radiation curable resin, an ultraviolet ray or electron beam curable resin can be used, and a composition obtained by appropriately mixing a prepolymer, an oligomer and / or a monomer having a polymerizable unsaturated bond or an epoxy group in a molecule is used. Can be used.
Examples of the prepolymer and oligomer include unsaturated polyesters such as a condensate of an unsaturated dicarboxylic acid and a polyhydric alcohol, methacrylates such as an epoxy resin, polyester methacrylate, polyether methacrylate, and polyol methacrylate, polyester acrylate, polyether acrylate, and polyol. Acrylates such as acrylate are exemplified.

Examples of the monomer include a compound having at least one polymerizable carbon-carbon unsaturated bond. For example, allyl acrylate, benzyl acrylate, butoxyethyl acrylate, butoxyethylene glycol acrylate, cyclohexyl acrylate,
One or a mixture of two or more of dicyclopentanyl acrylate, dicyclopentenyl acrylate, 2-ethylhexyl acrylate, glycerol acrylate and the like can be mentioned.

In particular, in the case of an ultraviolet curing type, a photoinitiator is appropriately mixed with the above composition. Benzophenone, methyl o-benzoylbenzoate, 4,4
-Pis (dimethylamino) benzophenone, 4,4-pis (diethylamino) benzophenone, α-aminoacetophenone, 4,4-dichlorobenzophenone, 4-benzoyl-4-methyldiphenyl ketone, 1 dibenzyl ketone, fluorenone, 2,2- Examples include a combination of a photoreducing dye such as diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, and methylene blue with a reducing agent such as ascorbic acid and triethanolamine. Further, one or more of these photoinitiators may be used in combination.

Although the transfer sheet is formed in a flat plate shape in FIG. 3, it may be formed in a cylindrical shape. In order to improve the transferability of the ink layer from the concave portion in the base film, if necessary, A release layer may be provided on the surface of the concave portion, and a release agent may be kneaded in the base film or the curable resin forming the concave portion.
Release agents include, for example, waxes such as polyethylene wax, amide wax, Teflon powder, silicone wax, carnauba wax, acrylic wax, paraffin wax, fluororesins, melamine resins, polyolefin resins, ionizing radiation-curable polyfunctional acrylate resins , A polyester resin, an epoxy resin, an amino-modified, an epoxy-modified, an OH-modified, a COOH-modified, a catalyst-curable, a photocurable, a thermosetting silicone oil or a silicone resin. When forming a release layer, the film thickness is 1
The thickness is from 0 to 3000 μm.

Next, the recess 12 formed on the base film is filled with an ink layer. As the ink layer,
In the case of a partition wall as its application, it is composed of at least an inorganic component having a glass frit and a resin component removed by firing. As a glass frit, its softening point is 3
At 50 ° C to 650 ° C, the coefficient of thermal expansion α300 is 60 × 10
⁻⁷ / ° C. to 100 × 10 ⁻⁷ / ° C. If the softening point of the glass frit exceeds 650 ° C., it is necessary to increase the firing temperature, and depending on the lamination object, it is not preferable because it is thermally deformed. It is not preferable because glass frit is fused and voids and the like are generated in the layer. When the coefficient of thermal expansion is out of the range of 60 × 10 ⁻⁷ / ° C. to 100 × 10 ⁻⁷ / ° C., the difference from the coefficient of thermal expansion of the glass substrate is large, which is not preferable because distortion occurs.

As the inorganic component, two or more kinds of inorganic powders and inorganic pigments may be used in addition to the glass frit. The inorganic powder is an aggregate, and is added as needed. Inorganic powders are intended to prevent casting during firing and improve class density, and have a higher softening point than glass frit, such as aluminum oxide, boron oxide, silica, titanium oxide, and magnesium oxide. , Calcium oxide, strontium oxide, barium oxide, calcium carbonate and the like can be used, and examples thereof include those having an average particle size of 0.1 μm to 20 μm. The inorganic powder may be used in an amount of 0 to 30 parts by weight based on 100 parts by weight of the glass frit.

Inorganic pigments are added as necessary to reduce external light reflection and improve practical contrast, and when dark colors are used, they are used as fire-resistant black pigments. , Co-Cr-Fe, Co-Mn-
Fe, Co-Fe-Mn-Al, Co-Ni-Cr-F
e, Co-Ni-Mn-Cr-Fe, Co-Ni-Al
-Cr-Fe, Co-Mn-Al-Cr-Fe-Si and the like. Examples of the fire-resistant white pigment include titanium oxide, aluminum oxide, silica, and calcium carbonate.

Next, the resin component removed by firing is as follows:
It is a thermoplastic resin or a curable resin, and is contained as a binder of an inorganic component and for the purpose of improving transferability. Examples of the thermoplastic resin include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, sec-butyl acrylate, sec-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, ter
Preferred are polymers composed of one or more of t-butyl acrylate, tert-butyl methacrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate and the like, or cobolimers, ethylcellulose and boribene derivatives. In addition, as the curable resin, the cured resin described when forming the concave portion on the base film surface described above can be used.

The proportion of the inorganic component to the resin component is 3 to 50 parts by weight, preferably 5 to 30 parts by weight, based on 100 parts by weight of the inorganic component.
When the amount of the resin component is less than 3 parts by weight, a problem arises in that the pattern shape retention is poor and the production of PDP or the like is hindered. On the other hand, if the amount exceeds 50 parts by weight, carbon remains in the film after sintering, and the quality is undesirably deteriorated.
If necessary, a plasticizer, a thickener, a dispersant, an anti-settling agent, an antifoaming agent, a release agent, a leveling agent and the like are added.

The plasticizer is added for the purpose of improving transferability and fluidity of the ink. Examples of the plasticizer include phthalate esters such as dimethyl phthalate and dibutyl phthalate;
Tri-2-ethylhexyl trimellitate, tri-n-
Trimellitate such as alkyl trimellitate,
Examples thereof include aliphatic dibasic acid esters such as dimethyl adipate and dibutyl adipate, and glycol derivatives. Thickeners are those added as necessary for the purpose of increasing the viscosity of the ink, and known ones can be used, for example, hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose,
And the like.

The dispersant and the anti-settling agent are intended to improve the dispersibility of the inorganic component and the anti-settling property. Examples of the dispersant include a phosphate ester type, a silicone type, a castor oil ester type, and various interfacial lubricants. Examples of the defoaming agent include, for example, silicone type, acrylic type, various interfacial lubricating agents, etc., and examples of the release agent include, for example, silicone type, fluorine type, paraffin type, fatty acid type, fatty acid ester type, castor oil type. , Wax type, compound type is exemplified,
As the leveling agent, for example, fluorine-based, silicone-based, various interfacial lubricating agents and the like are exemplified, and each is added in an appropriate amount.

The above ink materials include anones such as methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, toluene, xylene, cyclohexanone, methylene chloride, 3-methoxybutyl acetate,
Ethylene glycol monoalkyl ethers, ethylene glycol alkyl ether acetates, diethylene glycol monoalkyl ethers, diethylene glycol monoalkyl ether acetates, propylene glycol monoalkyl ethers, propylene glycol monoalkyl ether acetates, dipropylene glycol monoalkyl ethers, An ink is obtained by dissolving or dispersing in terpenes such as dipropylene glycol monoalkyl ether acetates and α- or β-terpionyl. A non-sol type ink that does not use such a solvent may be used.

A protective film may be attached to the surface of the transfer sheet, if necessary, for the purpose of preventing scratches, preventing dust from entering, preventing blocking, and the like. Protective films are, for example, polyethylene terephthalate film, 1.4-polycyclohexylene dimethylene terephthalate film, polyethylene naphthalate film, polyphenylene sulfide film, polystyrene film, polypropylene film, polysulfone film, aramid film, polycarbonate film, polyvinyl alcohol film, cellophane, Cellulose derivative films such as cellulose acetate, polyethylene films, polyvinyl chloride films, nylon films, polyimide films, ionomer films, etc., with a film thickness of 1 μm to 400 μm in which the laminated surface is peeled off by silicone treatment, acrylic melamine treatment, wax treatment, etc. , Preferably 4.5
μm to 200 μm.

The ink may be filled in the recesses of the base film and, if necessary, a protective film may be pasted thereon, and then the sheet may be wound up. However, the sheet may be directly transferred to the substrate without providing the protective film. Good. Also, the base film may be cut to the required length and then filled with ink and used for transfer, or the filled ink may be cut to the required length and transferred to the substrate. May be used.

Next, a pattern forming method using a transfer sheet will be described with reference to FIGS. Ink layer 13
The base film 11 filled with is preferably transferred from the back surface of the base film 11 using a pressing roller (not shown) or the like after being laminated on the transfer target body 14.
When the resin component in the ink layer is a thermoplastic resin, it is preferable to apply heat and pressure by a method such as a hot roller, a laser beam, or a hot press. It may be cured,
After the transfer, it may be cured. Further, a heat roller may be used at the time of lamination. When the pattern is a partition in a PDP member, the transfer target 14 has only an electrode layer on a glass substrate with or without an underlayer.
Alternatively, an electrode layer and a dielectric layer are sequentially laminated.

In addition, the concave pattern of the transfer sheet may be filled by laminating a plurality of ink layers having different pigments. For example, as a pattern for a partition wall forming layer, after a black ink layer is first provided partially in a concave portion, then a white ink layer is laminated, and a filling structure including a black ink layer and a white ink layer may be used. In this case, a partition having a multilayer structure in which black ribs are stacked on white ribs in a state of being transferred onto a substrate can be used. Thereby, the observation side of the partition becomes black, and the contrast is improved. In transferring a pattern using a transfer sheet, a filling operation and a transfer operation may be repeated a plurality of times with the same pattern to obtain a desired film thickness.

The pattern forming method using the transfer sheet is particularly suitable for forming a high-definition pattern such as a partition wall, and can shorten the production time, improve the yield, and improve the surface smoothness. A pattern having excellent uniformity, uniform thickness and good distribution accuracy can be obtained. After the ink layer has been transferred to the transfer object in a pattern,
By vaporizing, decomposing, and volatilizing the organic components in the ink layer at a firing temperature of up to 650 ° C., the inorganic powder can be tightly bound by the molten glass frit. A ground layer, a dielectric layer, and the like can be formed.

The method for forming the partition and the auxiliary partition is not limited to the above-described method. For example, as a first step, a partition wall and an auxiliary partition wall up to the height of the auxiliary wall are formed,
Next, as a second step, an upper partition is formed. With such a stepwise forming method, a photolithography method using a photosensitive material, a printing method, a sandblast method,
The partition wall and the auxiliary partition wall in the present invention can be formed by a method of forming a partition wall such as a filling method of forming and filling a mold on a substrate.

[0037]

Embodiments will be described below with reference to embodiments. (Formation of Base Film) An ultraviolet curable ink (DKF-901, manufactured by Nippon Kayaku Co., Ltd.) was loaded into the apparatus shown in FIG. 7, and a polyethylene terephthalate film (film thickness 754 m) was used as a base film. The radiation source was ultraviolet irradiation (600 mJ / cm ² ), and as shown in FIG.
A concave portion was formed at m / min. As the shape of the concave portion, the partition shape shown in FIG. 1 and FIG. 2 and the conventional partition shape (without auxiliary partition) can be obtained respectively, and the partition walls 1a, 1b, 1
c, a concave portion having a line width of 70 μm and a depth of 180 μm, and a line width of 50 μm for the auxiliary partition walls 2a, 2b, 2c, 2d.
m, a concave portion having a depth of 100 μm, and auxiliary partition walls 4a, 4
With respect to b, 4c and 4d, a recess having a line width of 30 μm at the top, a line width of 60 μm at the foot, and a depth of 100 μm was formed.

(Composition of ink for forming partition walls) Glass frit (MB-008, manufactured by Matsunami Glass Industry Co., Ltd.) 65 parts by weight α-alumina RA-40 (Iwatani Chemical Industry) 10 Parts by weight Dipiroxyzide black # 9510 (manufactured by Dainichi Seika Kogyo Co., Ltd.) 10 parts by weight n-butyl methacrylate / 2-hydroxyethyl methacrylate copolymer (8/2) 8 Parts by weight-Polyoxyethylenated trimethylolpropane triacrylate-8 parts by weight-Silicone resin (X-24-8300 manufactured by Shin-Etsu Chemical Co., Ltd.)-1 part by weight-Photoinitiator (Ciba Geigy) "Irgaki Yua 369") ··· 3 parts by weight · Propylene glycol monomethyl ether ··· 10 parts by weight · Isopropyl alcohol ··· 10 The parts by weight were mixed and dispersed using a peas mill using ceramic beads to prepare an ink used for forming the partition walls.

(Formation of Transfer Sheet) The ink was filled in the concave portion of the base film having the concave portion obtained above by a doctor with a doctor, and a polyethylene film was laminated to form a transfer sheet of the present invention. (Formation of partition walls) After peeling off the polyethylene film of the transfer sheet, an auto cut laminator (Asahi Kasei Corporation)
And a model ACL-9100), and laminated on a glass substrate provided with an underlayer, an electrode, and a dielectric layer in that order under a transfer condition of a substrate preheating temperature of 80 ° C. and a laminating roller temperature of 100 ° C. Next, the base film was peeled off, and 570 ° C.
Was fired.

A PDP was constructed using the back plate having the partition walls formed as described above, and its characteristics were measured. The results shown in Table 1 below were obtained.

[Table 1]

[0041]

As described above, according to the present invention, there is provided a plasma display panel having auxiliary partition walls capable of increasing the luminance when the fluorescent screen is illuminated. Further, it has a partition formed on the back plate in a direction parallel to the address electrode, and an auxiliary partition formed on the back plate in a direction parallel to the bus electrode, and discharges the discharge space specified by the address electrode and the bus electrode to another. According to the present invention, which separates from the discharge space,
The luminance can be increased, and the auxiliary partition can prevent the discharge or ultraviolet rays generated by the discharge from leaking to the adjacent display cell portion in the address direction. Further, according to the present invention, in which two ridges in a cross section of the auxiliary partition wall in a direction parallel to the address electrode are widened toward the back plate, the apparent brightness is further improved, and the width of the wide auxiliary partition wall and the back plate is increased. The bonding area can be obtained, and the strength of the entire partition can be obtained. As a result, the discharge volume can be increased, and the discharge efficiency can be further improved. Further, since the pixel pitch can be reduced, high definition can be achieved. Further, according to the present invention, in which the height of the auxiliary partition is 1/2 to 5/6 of the height of the partition, the same operation and effect as described above can be obtained, and the formation of the phosphor screen in the manufacturing process can be achieved. It will be easier.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example (part 1) of the shape of a partition wall in a PDP of the present invention.

FIG. 2 is a perspective view showing an example (part 2) of the shape of a partition wall in the PDP of the present invention.

FIG. 3 is a view showing a cross section of a base film in which a concave portion is formed.

FIG. 4 is a diagram showing a cross section of a transfer sheet.

FIG. 5 is an explanatory diagram of a method of forming a partition and an auxiliary partition.

FIG. 6 is an explanatory diagram of a state where a partition and an auxiliary partition are transferred.

FIG. 7 is an explanatory diagram of a method for producing a base film using an intaglio roller.

FIG. 8 is a diagram for explaining an AC type plasma display panel.

FIG. 9 is a view for explaining another example of the AC type plasma display panel.

[Explanation of symbols]

1a, 1b, 1c Partition walls 2a, 2b, 2c, 2d, 4a, 4b, 4c, 4d Auxiliary partition walls 3 Back plate 11 Base film 12 Concave pattern portion 13 Ink layer 14 Transfer receiving member 33 Roller intaglio 34 Concave portion 35 Resin supply device 36 Curable resin 37 Curing device 39 Peeling roller 40 Coating part 44 Feeding take-up roll 45 Feeding side feed roller 47 Compensator roller 48 Discharge take-up roll 101 Front plate 102 Back plate 103 Cell barrier 104 Sustain electrode 105 Bus electrode 106, 106 'Dielectric layer 107 MgO layer 108 Address electrode 109 Phosphor screen 110 Underlayer

Claims (3)

[Claims] A discharge space defined by the address electrode and the bus electrode, the partition having a partition formed on the back plate in a direction parallel to the address electrode, and an auxiliary partition formed on the back plate in a direction parallel to the bus electrode. A plasma display panel, wherein the plasma display panel is separated from other discharge spaces. 2. The plasma display panel according to claim 1, wherein two ridges in a cross section of the auxiliary partition wall in a direction parallel to the address electrodes have a shape expanding toward the back plate. 3. The height of the auxiliary partition is one of the height of the partition.
2. The plasma display panel according to claim 1, wherein the height is between / 2 and 5/6.