JPH10321147A - Plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently generate ultraviolet rays, enlarge the light emitting area of a fluorescent screen, effectively operate the ultraviolet rays, and enhance luminance when the fluorescent screen is made to emit the light by forming barrier ribs in the shape of expanding a discharge space by thinning a width of a discharge cell part. SOLUTION: Barrier ribs 1a and 1b are formed on a back face plate 3 in the parallel direction to an address electrode. The address electrode is arranged on a barrier rib side surface on the back face plate 3 between the barrier ribs. In this case, the barrier ribs 1a and 1b are thinned in its width in a discharge cell part, that is, in parts 2a, 2b, 2c and 2d of the barrier ribs, and are made to coincide with the discharge cell part. Since a discharge space of a discharge cell can be expanded by the formation of these barrier ribs, ultraviolet rays can be efficiently generated, and the light emitting area of a fluorescent screen is enlarged, and since the ultraviolet rays efficiently operate, luminance can be enhanced.

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. 9 shows an example of the 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. A partition wall 1 is provided on the front plate side of the glass substrate 2 serving as a back plate so as to be orthogonal to the composite electrode.
The address electrodes 108 are formed in parallel with each other and the fluorescent screen 109 is provided so as to cover the wall surface of the partition wall 103 and the cell bottom surface. Also,
As shown in FIG. 10, after a base layer 10 made of a dielectric is formed on a glass substrate 102 serving as a back plate, an address electrode 108 is provided, and a dielectric layer 106 ′ is further laminated thereon. It has a structure provided with a phosphor screen 109. 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. 9 and 10, 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 the partition 1
A simple shape determined by the shape of the wall surface and the bottom surface of the cell 03 restricts 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 is "a plasma display panel in which a plurality of partitions formed in parallel lines on a back plate have a shape in which a width of a discharge cell portion is reduced and a discharge space is enlarged". According to the present invention, since the partition has a narrow shape in the discharge cell portion, the discharge space is expanded, the ultraviolet light is generated efficiently, the emission area of the phosphor screen is increased, and the ultraviolet light acts efficiently, thereby increasing the brightness. It is possible. On the other hand, other than the discharge cell portion, the width has a relatively large shape and can play a role required for the width of the partition as a whole.

[0007] The present invention is also directed to "a plasma display panel having a shape in which a plurality of side walls are formed in a parallel array on a back plate and the side surfaces are wavefronts and the side area is enlarged." According to the present invention, since the partition wall has a wavefront shape on the side surface, the side area is increased, the light emitting area of the phosphor screen is increased, and ultraviolet light acts efficiently, so that the luminance can be increased. In addition, the present invention is "a plasma display panel having a shape in which a plurality of partitions are formed in parallel lines on a back plate, the width of which gradually decreases from a skirt portion to a top portion".
According to the present invention, since the partition has a shape in which the width decreases stepwise from the skirt portion to the top portion, the light emitting area of the phosphor screen increases, and ultraviolet light acts efficiently, so that the luminance can be increased.

[0008]

Next, the present invention will be described with reference to embodiments. FIGS. 1, 2 and 3 are perspective views showing an example of the shape of the partition wall in the PDP of the present invention. 1, 2 and 3, reference numerals 1a, 1b and 1c denote partition walls, 2a and 2
b, 2c, 2d are narrow portions in the partition, 3 is a back plate, 4a, 4b, 4c are wavefront-shaped partition side surfaces, 5a, 5
“b” is a partition portion whose width gradually decreases from the skirt portion to the top portion. Although a large number of partition walls are actually formed on the back plate 3, only two of them are shown in FIG. 1, only three in FIG. 2, and only one in FIG. .

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, 2 and 3, the partition walls 1a, 1
b and 1c have a trapezoidal cross section in the direction perpendicular to the direction in which the partition extends, or a trapezoidal combination of different widths (in the case of FIG. 3), but the cross sectional shape is not limited to the trapezoidal shape. It may be rectangular, and each side of the cross section may not be a straight line.

In FIG. 1, the partition walls 1a and 1b are provided in the discharge cell portion, that is, the partition wall portions 2a, 2b, 2c,
In 2d, the width is reduced. Partition part 2a,
2b, 2c and 2d are made to coincide with the discharge cell section.
Due to the shape of the partition walls, the discharge space of the discharge cells can be enlarged, and ultraviolet rays can be generated efficiently.
In addition, since the light emitting area of the phosphor screen is increased and the ultraviolet rays act efficiently, the luminance can be increased. On the other hand, the width of the partition walls 1a and 1b other than the discharge cell portion has a relatively large shape and plays a role required for the width of the partition wall as a whole, that is, adhesion to the back plate 3, and contact with the front plate for address electrodes. Can be separated.

In FIG. 2, partitions 1a, 1b, 1c are
The side surface is a wavefront, that is, the wavefront-shaped partition wall side surface 4a,
4b and 4c have a shape that enlarges the side area. Due to the shape of the partition walls, the partition walls 1a, 1b, and 1c have an increased side area on the side surface of the discharge cell portion, a light-emitting area of the phosphor screen is increased, and ultraviolet light acts efficiently, so that brightness can be increased. In FIG. 3, the partition 1a has a shape in which the width gradually decreases from the skirt portion to the top portion, that is, partition portions 5a and 5b whose width gradually decreases from the skirt portion to the top portion. Due to the shape of the partition wall, the partition wall 1a has a large emission area of the phosphor screen, and the ultraviolet rays act efficiently, so that the luminance can be increased.

Next, a typical method of forming the partition walls according to the present invention will be described. FIG. 4 is a cross-sectional view of a base film having a concave pattern formed on the surface, FIG. 5 is a cross-sectional view of a transfer sheet for forming a partition, and FIGS.
FIG. 7 is a view for explaining a pattern forming method using the transfer sheet shown in FIG. This pattern forming method can be applied not only for forming the partition in the PDP but also for forming an underlying layer, an electrode, a dielectric layer and other patterns. Here, the method for forming the partition will be described. 4 to 7, reference numeral 11 denotes a base film;
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 the heat treatment in the process, and a plastic film such as polyethylene terephthalate, a sheet, aluminum,
A metal foil such as copper is used. The film thickness is, for example, 100 μm
Those having a thickness of up 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 that 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. 8, 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. 8, 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 °.

As the roller intaglio 33, a roller having a predetermined concave portion 34 formed by a method such as electronic engraving, etching, mill pressing, and electroforming can be used. 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.

The monomer includes 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. 4, 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, the transfer sheet may be provided as 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 α ₃₀₀ 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,
It is not preferable because distortion occurs.

As the inorganic component, two or more inorganic powders and two or more 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. When darkening, 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 phthalic acid 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, and examples thereof include phosphate esters, silicones, castor oil esters and various interfacial lubricants. Examples of the defoaming agent include, for example, silicone type, acrylic type, various interfacial lubricating agents, and the like, and examples of the release agent include 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 and 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.

Further, a protective film is 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 attached to the base film. Then, the sheet may be wound up, but may be directly transferred to a 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 on 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 manufacturing 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 of forming the partition is not limited to the method described above. For example, the partition walls in the present invention can be formed by a partition forming method such as a photolithography method using a photosensitive material, a printing method, a sand blast method, or a filling method of forming a mold on a substrate and filling. In the case of the shape as shown in FIG. 3, for example, a partition up to a height of 5a is formed as a first step, and then a partition up to a height of 5b is formed as a second step. Then, the partition wall can be formed by the above-described partition wall forming method.

[0036]

Embodiments will be described below with reference to embodiments. (Formation of base film) UV curable ink (DKF-90, manufactured by Nippon Kayaku Co., Ltd.)
1) 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 source was irradiated with ultraviolet light (600 mJ /
cm ² ), as shown in FIG. 7, a concave portion was formed on the base film at a rotational speed of the intaglio roller of 5 m / min. As the shape of the concave portion, a partition shape shown in FIGS. 1, 2 and 3 and a conventional partition shape (linear partition) can be obtained. The partition walls 1a, 1b, 1c of FIG. 2 are provided with a concave portion having a maximum line width of 70 μm, a minimum portion (2a, 2b, 2c, 2d) of a line width of 30 μm, and a depth of 180 μm. The line width of the largest part is 70 μm, the line width of the smallest part (4a, 4b, 4c) is 40 μm, and the depth is 18.
0 μm recesses and a line width of 70 μm with respect to the partition 5b of FIG.
μm, depth 180 μm, line width 120 μm for partition wall 5a
m, a concave portion having a depth of 90 μm, and a concave portion having a line width of 70 μm and a depth of 180 μm were formed with respect to the conventional partition wall shape (linear partition wall).

(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 into the concave portion of the base film having the concave portion obtained above by a doctor with an ink, 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]

[0040]

As described above, according to the present invention, there is provided a plasma display panel having a partition wall shape capable of increasing luminance when a fluorescent screen is illuminated.

[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 perspective view showing an example (part 3) of the shape of a partition wall in the PDP of the present invention.

FIG. 4 is a view showing a cross section of a base film in which a concave portion is formed.

FIG. 5 is a diagram illustrating a cross section of a transfer sheet.

FIG. 6 is an explanatory diagram of a method of forming a partition.

FIG. 7 is an explanatory diagram of a state where a partition is transferred.

FIG. 8 is an explanatory diagram of a method for producing a base film using an intaglio roller.

FIG. 9 is a diagram for explaining an AC type plasma display panel.

FIG. 10 is a diagram for explaining another example of the AC type plasma display panel.

[Explanation of symbols]

 1a, 1b, 1c Partition walls 2a, 2b, 2c, 2d Thin portions of partition walls 3 Back plate 4a, 4b, 4c Side surfaces of wave-shaped partition walls 5a, 5b Partition wall portions whose width decreases stepwise 11 Base film 12 Concave pattern Unit 13 Ink layer 14 Transfer receiving body 33 Roller intaglio 34 Concave portion 35 Resin supply device 36 Curable resin 37 Curing device 39 Peeling roller 40 Coating unit 44 Feeding take-up roll 45 Feeding side feed roller 47 Compensator roller 48 Discharge winding 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] 1. A plasma display panel, wherein a plurality of partitions formed in parallel lines on a back plate have a shape in which a width of a discharge cell portion is reduced and a discharge space is enlarged. 2. The plasma display panel according to claim 1, wherein a plurality of partitions formed in parallel on the back plate have a shape in which a side surface is a wavefront and a side area is enlarged. 3. The plasma display panel according to claim 3, wherein the partition walls are formed in a plurality of parallel lines on the back plate, and have a shape in which the width gradually decreases from a skirt portion to a top portion.