JPH11338383A - Display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a weight of a display panel by making a bias angle defined by either a crossing angle between an extending direction of a 1st wire material group and the long side of an approximately rectangular transparent substrate or a crossing angle between an extending direction of a 2nd wire group and the long side of the approximately rectangular transparent substrate, whichever smaller. SOLUTION: Peripheral parts of a conductive mesh 5 sticking out of peripheral parts of a transparent substrate 2 and a PDP main body are turned in along the peripheries of the PDP main body. And, in the whole circumference of the laminated body of the transparent substrate 2, the conductive mesh 5, and the PDP main body, conductive adhesive tapes are provided so that they are adhered to the whole end faces of the laminated body and also go around the front and back edges of this laminated body, and are adhered to the peripheral part of the front face of the transparent substrate 2 and the peripheral part of the front face of the PDP main body. In this case, the conductive mesh 5 between the PDP main body and the transparent substrate 2 is arranged so that a bias angle θ becomes larger than 10 deg.. In such a manner, it is possible to prevent moire phenomenon caused by interference between a picture element pitch of the PDP main body and a grid pitch of the conductive mesh 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge type display panel using a plasma display panel (hereinafter referred to as "PDP"), and more particularly to a display panel itself by integrating an electromagnetic wave shielding material with the PDP. By providing functions such as electromagnetic wave shielding, the display panel can be made lighter and thinner.
The present invention relates to a display panel capable of improving productivity and reducing cost by reducing the number of parts.

[0002]

2. Description of the Related Art PDP (plasm
A display panel has the following advantages over a liquid crystal display (LCD) and a cathode ray tube (CRT).
Research and development and commercialization of display panels such as OA equipment such as word processors, traffic equipment, signboards, and other display boards are being promoted. It uses discharge light and emits light. Since the discharge gap is 0.1 to 0.3 mm, it can be made into a panel type. Color light can be emitted using phosphors. Easy to make large screen panel.

The basic display mechanism of a PDP is to display characters and graphics by selectively discharging and emitting phosphors in a large number of discharge cells separated between two glass plates. For example, the configuration is as shown in FIG. FIG.
In the figure, 21 is a front plate (front glass), 22 is a rear plate (rear glass), 23 is a partition, 24 is a display cell (discharge cell), 25 is an auxiliary cell, 26 is a cathode, 27 is a display anode, and 28 is an auxiliary anode. A red phosphor, a green phosphor or a blue phosphor (not shown) is provided on the inner wall of each display cell 24 in the form of a film, and these phosphors are applied between the electrodes. It emits light when discharged by voltage.

An electromagnetic wave having a frequency of about several kHz to several GHz is generated from the front of the PDP by voltage application, discharge, and light emission, and it is necessary to shield the electromagnetic wave. In order to improve display contrast, it is necessary to prevent reflection of external light on the front surface. Further, there is a problem that the screen is overheated by the heat from the main body side of the device.

[0005] For this reason, conventionally, in order to shield electromagnetic waves from the PDP, a transparent plate (electromagnetic wave shielding light transmitting window material) having a function of shielding electromagnetic waves and the like is conventionally used.
It is arranged in front of P.

The electromagnetic-shielding light-transmitting window material used for this purpose is mainly configured by integrating a conductive mesh material such as a wire net between transparent substrates such as an acrylic plate.

In general, the transparent substrate of the electromagnetic wave shielding light transmitting window material has a rectangular shape. Conventionally, as shown in FIG. One of the longitudinal wire (hereinafter, referred to as "warp") 5A and the transverse wire (hereinafter, referred to as "weft") 5B constituting the conductive mesh 5 (the warp 5A in FIG. 4). Is arranged between the two transparent substrates so as to be parallel to a pair of opposed long sides of the transparent substrate 2.

[0008]

The provision of an electromagnetic wave shielding light transmitting window separate from the PDP on the front surface of the PDP has the following disadvantages. Since two plate members are arranged, the structure becomes complicated. Since both the PDP and the electromagnetic wave shielding light transmitting window material require a transparent substrate such as glass, the provision of the PDP and the electromagnetic wave shielding light transmitting window material increases the wall thickness.
Weight increases. The number of parts and the number of production steps increase, which leads to an increase in cost.

On the other hand, in an electromagnetic wave shielding light transmitting window material in which a conductive mesh is interposed between two transparent substrates, if the conductive mesh is fine, light transmittance is impaired. In order to ensure the quality, a coarse one is used.

However, when a coarse mesh conductive mesh is used, the moire phenomenon occurs due to the interference between the pixel pitch of the PDP and the pitch between the grids because the pixel pitch of the PDP and the grid interval are close to each other.

The present invention solves the above-mentioned conventional problems and provides a PD
By integrating the electromagnetic wave shielding material into P, the display panel itself is given a function such as electromagnetic wave shielding properties, and it is possible to increase the productivity and reduce the cost by reducing the weight and thickness of the display panel and reducing the number of parts. It is an object to provide a display panel.

Another object of the present invention is to provide a display panel which prevents moire development caused by interference between a grid pitch of a grid made of a conductive wire such as a conductive mesh as an electromagnetic shielding material and a PDP pixel pitch. Aim.

[0013]

The display panel of the present invention comprises:
A display panel comprising: a substantially rectangular plasma display panel main body; and a substantially rectangular transparent substrate joined to a front surface of the plasma display panel main body via a grid made of a conductive wire, The grid made up of a first wire group extending at substantially parallel
And a second wire group extending at substantially equal intervals in a substantially orthogonal direction, and an intersection angle between an extending direction of the first wire group and a long side of the substantially rectangular transparent substrate. And the second
The bias angle defined by the smaller one of the intersection angles between the extending direction of the wire group and the long side of the substantially rectangular transparent substrate is larger than 10 °.

In the grid made of a conductive wire according to the present invention, the first wire group and the second wire group constituting the grid are substantially orthogonal to each other and extend at substantially parallel and equal intervals, respectively. , The bias angle means the first wire group forming the grid made of the conductive wire and the long side of the transparent substrate (the direction of this long side is P
It matches the direction of the long side of the DP body. ) And the crossing angle between the second wire group forming the grid made of the conductive wire and the long side of the transparent substrate, whichever is smaller (the smaller crossing angle is also used). 5A, for example, as shown in FIG. 5A, the intersection angle a between the long side 2a of the transparent substrate 2 and the warp 5A, the long side 2a, and the weft 5B.
If b> a, the bias angle indicates a, and as shown in FIG. 5B, if a> b, b is the bias angle.

In the display panel of the present invention, since the PDP and the grid made of a conductive wire and the transparent substrate are joined and integrated, the display panel is lightweight and thin, and the productivity is improved by reducing the number of parts and the cost is improved. Can be reduced.

In the display panel provided with the grid made of the conductive wire as described above, by adjusting the distribution angle of the grid made of the conductive wire, the pixel pitch of the PDP and the grid of the grid-shaped conductive wire are adjusted. It is possible to prevent the moire phenomenon caused by the interference with the inter-pitch.

In the present invention, the grid made of a conductive wire may be a conductive mesh formed by weaving a conductive wire in a grid shape, or a conductive net formed in a grid on a transparent film or a transparent substrate. Membrane.

In the display panel according to the present invention, the pixel pitch of the PDP body is preferably 0.5 to 1.6 mm, particularly 1.0 to 1.6 mm.
1.3, and the interstitial pitch of the grid made of a conductive wire is 0.09 to 0.6 mm, particularly 0.18 to 0.3.
mm, and the bias angle is 15 to 22 °.
Or it is preferable that it is 36-42 degrees.

In the present invention, the grid made of a conductive wire is preferably bonded between the PDP body and the transparent substrate with a transparent adhesive mainly composed of an ethylene-vinyl acetate copolymer.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the display panel of the present invention will be described below in detail with reference to the drawings.

In the following, the present invention will be described by exemplifying a case where a conductive mesh is used as a grid made of a conductive wire. In the present invention, the grid made of a conductive wire is a conductive mesh. However, the present invention is not limited thereto, and a transparent film or a conductive net-like film formed in a lattice shape on a transparent substrate may be employed. In this case, the conductive net-like film may be formed directly on the transparent substrate, or may be formed on a separately prepared transparent film.

Such a conductive net-like film is formed, for example, as follows.

A metal (copper, aluminum, silver, nickel, tin, etc., preferably copper, nickel, silver) film is coated on a transparent film or a transparent substrate by vapor deposition, sputtering, or the like, or a metal foil is attached. Thereafter, a conductive net-like film having a predetermined pattern is formed by a process of coating a photoresist, exposing a pattern, and etching.

A conductive net-like film is formed by directly pattern-printing a transparent film or a transparent substrate with a conductive ink. When forming a conductive net-like film directly on a transparent substrate, for example,
In FIG. 1 described later, instead of providing a conductive mesh, a conductive net-like film may be formed on the bonding surface side of the transparent substrate 2 or the bonding surface side of the front plate of the PDP body 20. Also,
In the case of using a transparent film having a conductive net-like film formed thereon, the film may be interposed between the transparent substrate 2 and the PDP body 20 instead of the conductive mesh in FIG.

FIG. 1 is a schematic sectional view showing an embodiment of the display panel of the present invention, and FIG. 3 is a plan view for explaining a distribution angle of a conductive mesh with respect to a transparent substrate.

A display panel 1 shown in FIG. 1 has a transparent substrate 2 and a PDP body in which a near-infrared cut film 4 is adhered to one plate surface with an adhesive resin film 3C (this PDP body has the structure shown in FIG. The PDP body 20 is bonded and integrated with the bonding resin films 3A and 3B via the conductive mesh 5, and the periphery of the transparent substrate 2 and the PDP body 20 is used. The periphery of the conductive mesh 5 protruding from the portion is the PDP body 20.
Is folded along the periphery of. Then, in the entire periphery of the laminate of the transparent substrate 2, the conductive mesh 5, the near-infrared cut film 4, and the PDP main body 20, the adhesive adheres to the entire end face and goes around the front and back corners of the laminate,
A conductive adhesive tape 7 is provided so as to adhere to both the edge of the surface of the transparent substrate 2 and the edge of the surface of the PDP body 20.

In the present invention, the conductive mesh 5 between the PDP main body 20 and the transparent substrate 2 is provided with the bias angle θ.
Is preferably greater than 15 to 22 so that
° or 36 to 42 °.

As described above, by adjusting the distribution angle of the conductive mesh 5 with respect to the transparent substrate 2 (or the PDP main body 20), the interference between the pixel pitch of the PDP main body 20 and the interstitial pitch of the conductive mesh 5 is caused. Moire development can be prevented.

In the present invention, as shown in the drawing, the conductive adhesive tape 7 is provided with an adhesive layer 7b in which conductive particles are dispersed on one surface of a metal foil 7a. Acrylic, rubber, or silicone adhesives, or epoxy or phenolic resins mixed with a curing agent can be used.Especially, ethylene-vinyl acetate copolymers, which are cross-linkable conductive adhesives, can be used. What is a post-crosslinking type adhesive layer containing a polymer having a united body as a main component and a crosslinking agent thereof is preferable.

As the conductive particles to be dispersed in the adhesive layer 7b, various types of conductive particles may be used as long as they are electrically good conductors. For example, metal powder such as copper, silver, and nickel, resin or ceramic powder coated with such a metal can be used. There is no particular limitation on the shape, and any shape such as a scale shape, a tree shape, a granular shape, and a pellet shape can be adopted.

The compounding amount of the conductive particles is preferably 0.1 to 15% by volume based on the polymer constituting the adhesive layer 7b described later, and the average particle size is 0.1 to 10%.
It is preferably 0 μm. As described above, by defining the blending amount and the particle size, it is possible to prevent the conductive particles from condensing and obtain good conductivity.

In the case of a cross-linkable conductive adhesive tape, the adhesive layer 7
The polymer constituting b is mainly composed of an ethylene-vinyl acetate copolymer selected from the following (I) to (III), and has a melt index (MFR) of 1 to 3000, particularly 1 to 1000, especially 1 to 1 A value of 800 is preferred.

Thus, when the MFR is from 1 to 3000 and the vinyl acetate content is from 2 to 80% by weight, the following (I) to (II)
By using the copolymer (I), the tackiness before cross-linking is increased, the workability is improved, and the cured product after cross-linking has a high three-dimensional cross-linking density, exhibits strong adhesive strength, and has moisture resistance.・ The heat resistance is also improved.

(I) Ethylene-vinyl acetate copolymer having a vinyl acetate content of 20 to 80% by weight (II) Vinyl acetate content of 20 to 80% by weight and an acrylate and / or methacrylate monomer A copolymer of ethylene, vinyl acetate and acrylate and / or methacrylate monomers having a content of 0.01 to 10% by weight (III) a vinyl acetate content of 20 to 80% by weight,
When the content of maleic acid and / or maleic anhydride is 0.0
1 to 10% by weight of a copolymer of ethylene, vinyl acetate, maleic acid and / or maleic anhydride In the above ethylene-vinyl acetate copolymers (I) to (III), ethylene-vinyl acetate copolymer The combined vinyl acetate content is 20 to 80% by weight, preferably 20 to 80% by weight.
60% by weight. If the vinyl acetate content is less than 20% by weight, a sufficient degree of crosslinking cannot be obtained when crosslinking and curing at a high temperature, while if it exceeds 80% by weight, (I) and (II)
In the ethylene-vinyl acetate copolymer, the softening temperature of the resin is lowered, and storage becomes difficult, which is a practical problem.
In the case of the ethylene-vinyl acetate copolymer (III), the adhesive layer strength and durability tend to be significantly reduced.

In the copolymer (II) of ethylene, vinyl acetate and acrylate and / or methacrylate monomers, the content of the acrylate and / or methacrylate monomers is 0.01 to 10% by weight. , Preferably 0.05 to 5% by weight. When the content of the monomer is less than 0.01% by weight, the effect of improving the adhesive strength is reduced, while when it exceeds 10% by weight, the processability may be reduced. In addition, as an acrylate type | system | group and / or a methacrylate type | system | group monomer, the monomer selected from an acrylate or a methacrylate type monomer is mentioned, Acrylic acid or methacrylic acid is a C1-C20, especially -18 unsubstituted. Alternatively, an ester with a substituted aliphatic alcohol having a substituent such as an epoxy group is preferable, and examples thereof include methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, and glycidyl methacrylate.

In the (III) copolymer of ethylene, vinyl acetate, maleic acid and / or maleic anhydride, the content of maleic acid and / or maleic anhydride is 0.01 to 10% by weight. , Preferably 0.05 to 5
% By weight. If the content is less than 0.01% by weight, the effect of improving the adhesive strength is reduced, while if it exceeds 10% by weight, the workability may be reduced.

The polymer according to the present invention has the above (I)
Containing at least 40% by weight, particularly at least 60% by weight, of the ethylene-vinyl acetate copolymer of (III), and in particular, comprising only the ethylene-vinyl acetate copolymer of (I) to (III) above Is preferred. When the polymer contains a polymer other than the ethylene-vinyl acetate-based copolymer, the polymer other than the ethylene-vinyl acetate-based copolymer is an olefin-based polymer containing 20 mol% or more of ethylene and / or propylene in the main chain. Polymers, polyvinyl chloride, acetal resins and the like can be mentioned.

As a crosslinking agent for this polymer, an organic peroxide as a thermal crosslinking agent for forming a thermosetting adhesive layer, and as a photocrosslinking agent for forming a photocurable adhesive layer. Can be used.

As the organic peroxide, any organic peroxide can be used as long as it decomposes at a temperature of 70 ° C. or more to generate radicals. The adhesive is preferably selected in consideration of the application temperature of the pressure-sensitive adhesive, preparation conditions, storage stability, curing (adhesion) temperature, heat resistance of the object to be adhered, and the like.

Examples of usable organic peroxides include 2,5-dimethylhexane-2,5-dihydroperoxide and 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne- 3, di-t-butyl peroxide, t-butylcumyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane,
Dicumyl peroxide, α, α′-bis (t-butylperoxyisopropyl) benzene, n-butyl-4,
4′-bis (t-butylperoxy) valerate, 1,
1-bis (t-butylperoxy) cyclohexane,
1,1-bis (t-butylperoxy) -3,3,5-
Trimethylcyclohexane, t-butylperoxybenzoate, benzoyl peroxide, t-butylperoxyacetate, methyl ethyl ketone peroxide, 2,5-dimethylhexyl-2,5-bisperoxybenzoate, butyl hydroperoxide, p-
Menthane hydroperoxide, p-chlorobenzoyl peroxide, hydroxyheptyl peroxide, chlorohexanone peroxide, octanoyl peroxide, decanoyl peroxide, lauroyl peroxide, cumyl peroxy octoate, succinic acid peroxide, acetyl peroxide Oxide, t-butyl peroxy (2-ethylhexanoate), m-toluoyl peroxide, t-butyl peroxyisobutyrate, 2,4-dichlorobenzoyl peroxide, and the like. As organic peroxides,
At least one of them is used alone or in combination, and usually 0.1 to 10% by weight is added to the polymer.

On the other hand, as the photosensitizer (photopolymerization initiator), a radical photopolymerization initiator is suitably used. Among the radical photopolymerization initiators, benzophenone, methyl o-benzoyl benzoate, 4-
Benzoyl-4′-methyldiphenyl sulfide, isopropylthioxanthone, diethylthioxanthone,
Ethyl 4- (diethylamino) benzoate and the like can be used. In addition, among the radical photopolymerization initiators, benzoin ether, benzoyl propyl ether, benzyl dimethyl ketal, α-hydroxyalkylphenone as an intramolecular cleavage type initiator, and 2-hydroxy-2-type as an α-hydroxyalkylphenone type.
Methyl-1-phenylpropan-1-one, 1-hydroxycyclohexylphenyl ketone, alkylphenylglyoxylate, diethoxyacetophenone, and 2-methyl-1- [4- (methylthiophene) as α-aminoalkylphenone type )) Phenyl) -2-morpholinopropanone-1,2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butanone-1
But also acylphosphine oxide and the like. As the photosensitizer, at least one of them is used alone or in combination, and usually 0.1 to 10% by weight is added to the polymer.

The pressure-sensitive adhesive layer according to the present invention preferably contains a silane coupling agent as an adhesion promoter. Examples of the silane coupling agent include vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxy. Propyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, vinyltrichlorosilane, γ-mercaptopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-β- (aminoethyl) -γ
One or a mixture of two or more such as -aminopropyltrimethoxysilane is used. These silane coupling agents are usually used in an amount of 0.01 to 5% by weight based on the weight of the polymer.
Used to a degree.

Further, an epoxy group-containing compound may be blended as an adhesion promoter. In this case, as the epoxy group-containing compound, triglycidyl tris (2-hydroxyethyl) isocyanurate, neopentyl glycol diglycidyl ether, , 6-hexanediol diglycidyl ether, allyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, phenol (EO) ₅ glycidyl ether, p-
t-butylphenyl glycidyl ether, adipic acid diglycidyl ester, phthalic acid diglycidyl ester,
Glycidyl methacrylate, butyl glycidyl ether and the like can be mentioned. A similar effect can be obtained by alloying a polymer containing an epoxy group. These epoxy group-containing compounds may be used alone or in combination.
As a mixture of at least two or more kinds, usually 0.1 to 0.1% of the polymer is used.
About 1 to 20% by weight is used.

Physical properties (mechanical strength,
A compound having an acryloxy group, a methacryloxy group or an allyl group may be blended in the pressure-sensitive adhesive layer in order to improve or adjust the adhesiveness, optical properties, heat resistance, moisture resistance, weather resistance, crosslinking rate, etc.). .

As the compound used for this purpose, acrylic acid or methacrylic acid derivatives such as esters and amides thereof are the most common, and the ester residue is an alkyl group such as methyl, ethyl, dodecyl, stearyl and lauryl. Cyclohexyl group, tetrahydrofurfuryl group, aminoethyl group, 2-hydroxyethyl group, 3-hydroxypropyl group, 3-chloro-2-
And a hydroxypropyl group. Further, esters with polyfunctional alcohols such as ethylene glycol, triethylene glycol, polypropylene glycol, polyethylene glycol, trimethylolpropane, and pentaerythritol are also used. As the amide, diacetone acrylamide is typical. Examples of the polyfunctional crosslinking assistant include acrylic acid or methacrylic acid ester such as trimethylolpropane, pentaerythritol and glycerin, and compounds having an allyl group include triallyl cyanurate, triallyl isocyanurate, diallyl phthalate, diallyl isophthalate. , Diallyl maleate and the like. These compounds are usually used as one kind or as a mixture of two or more kinds,
0% by weight, preferably 0.5 to 30% by weight is used. If the amount exceeds 50% by weight, the workability and coatability during preparation of the pressure-sensitive adhesive may be reduced.

Further, a hydrocarbon resin can be added to the pressure-sensitive adhesive layer for the purpose of improving workability, bonding and the like. In this case, the hydrocarbon resin to be added may be either a natural resin type or a synthetic resin type. Rosin, rosin derivatives, and terpene resins are preferably used as the natural resin. For rosin, gum-based resins, tall oil-based resins, and wood-based resins can be used. As the rosin derivative, rosin obtained by hydrogenation, heterogeneization, polymerization, esterification, and metal salification can be used. As the terpene-based resin, terpene-based resins such as α-pinene and β-pinene, as well as terpene phenol resins can be used. Further, dammar, koval, and shellac may be used as other natural resins. On the other hand, in the case of synthetic resins, petroleum resins, phenol resins, and xylene resins are preferably used. Petroleum resins include aliphatic petroleum resins, aromatic petroleum resins, alicyclic petroleum resins, copolymer petroleum resins, hydrogenated petroleum resins,
Pure monomer petroleum resins and coumarone indene resins can be used. As the phenolic resin, an alkylphenol resin and a modified phenol resin can be used. As the xylene-based resin, a xylene resin or a modified xylene resin can be used. The addition amount of these hydrocarbon resins is appropriately selected, but is preferably from 1 to 200% by weight, more preferably from 5 to 150% by weight, based on the polymer.

In addition to the above additives, in the present invention,
Antioxidants, ultraviolet absorbers, dyes, processing aids, and the like may be incorporated in the pressure-sensitive adhesive layer in a range that does not impair the purpose of the present invention.

As the metal foil 7a serving as the base material of the cross-linkable conductive adhesive tape 7, copper, silver, nickel, aluminum,
A foil of stainless steel or the like can be used, and its thickness is usually about 1 to 100 μm.

The adhesive layer 7b is obtained by uniformly mixing the above-mentioned ethylene-vinyl acetate copolymer, a cross-linking agent, and other additives as necessary with the conductive particles at a predetermined ratio in the metal foil 7a. Can be easily formed by coating with a roll coater, a die coater, a knife coater, a my cover coater, a flow coater, a spray coater or the like.

The thickness of the adhesive layer 7b is usually 5 to 1
It is about 00 μm.

In the present invention, the constituent materials of the transparent substrate 2 include glass, polyester, polyethylene terephthalate (PET), polybutylene terephthalate, polymethyl methacrylate (PMMA), acrylic plate, polycarbonate (PC), polystyrene, and triacetate film. , Polyvinyl alcohol, polyvinyl chloride,
Polyvinylidene chloride, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl butyral, metal ion-crosslinked ethylene-methacrylic acid copolymer, polyurethane, cellophane, etc., preferably, glass, PET, PC, PM
MA.

The thickness of the transparent substrate 2 is appropriately determined according to the required characteristics (for example, strength and lightness) depending on the use of the display panel to be obtained, but is usually in the range of 0.1 to 10 mm.

In the display panel 1 of this embodiment, an antireflection film 8 is formed on the surface of the transparent substrate 2 on the front side.
As the antireflection film 8 formed on the surface side of the transparent substrate 2, a single-layer film of the following (1) or a laminated film of a high-refractive-index transparent film and a low-refractive-index transparent film, for example, the following (2) To (5).

(1) One layer of a transparent film having a lower refractive index than the transparent substrate (2) One layer of a high-refractive-index transparent film and one layer of a low-refractive-index transparent film (3) High A total of four alternately laminated two-layer transparent and low-refractive-index transparent films (4) One layer in the order of medium-refractive-index transparent film / high-refractive-index transparent film / low-refractive-index transparent film. Three layers laminated (5) High refractive index transparent film / Low refractive index transparent film In this order, three layers are alternately laminated, and a total of six layers are laminated. As the high refractive index transparent film, ITO (tin indium) is used. Oxide) or ZnO, Al-doped ZnO, TiO ₂ ,
A thin film having a refractive index of 1.8 or more, such as SnO ₂ or ZrO, preferably a transparent conductive thin film can be formed. Also,
As the low-refractive-index transparent film, a thin film made of a low-refractive-index material having a refractive index of 1.6 or less, such as SiO ₂ , MgF ₂ , or Al ₂ O _3, can be formed. These film thicknesses differ depending on the film configuration, film type, and center wavelength in order to reduce the reflectance in the visible light region due to light interference. However, in the case of a four-layer structure, the first layer on the transparent substrate side (high refractive index) 5 to 50 nm for the second layer (transparent film with low refractive index), 50 to 100 nm for the third layer (transparent film with high refractive index), and 50 for the fourth layer (transparent film with low refractive index). It is formed with a thickness of about 150 nm.

Further, an anti-contamination film may be further formed on the anti-reflection film 8 so as to enhance the surface's anti-staining property. In this case, as the contamination prevention film, a film thickness of 1 to 1000 nm made of a fluorine-based thin film, a silicon-based thin film, or the like.
A thin film of the order is preferred.

In the display panel of the present invention, the transparent substrate 2 on the front surface side is further subjected to a hard coat process using a silicon-based material or the like, or an anti-glare process in which a light scattering material is kneaded in the hard coat layer. Is also good. Further, the above-described anti-reflection film, hard coat film, anti-glare film or the like can be attached to the transparent substrate 2 with a transparent adhesive or a transparent adhesive.

Further, the PDP body 20 can be provided with a heat ray reflection coat such as a metal thin film or a transparent conductive film to enhance the functionality. The transparent conductive film is a transparent substrate 2 on the front side.
Can also be formed.

The near-infrared cut film 4 may be a base film on which a near-infrared (heat ray) cut coat such as zinc oxide, ITO (indium tin oxide), silver thin film or the like is applied. As the film, a film made of PET, PC, PMMA or the like can be preferably used. This film has a thickness of 10 μm for ensuring handleability and durability without excessively increasing the thickness of the obtained electromagnetic wave shielding light transmitting window material.
It is preferably about 20 mm. The thickness of the near-infrared cut coat formed on the base film is usually about 500 to 5000 °.

In the present invention, a transparent conductive film may be provided instead of the near-infrared cut film or together with the near-infrared cut film.
As the transparent conductive film, a resin film in which conductive particles are dispersed, or a film in which a transparent conductive layer is formed on a base film can be used.

The conductive particles to be dispersed in the film are not particularly limited as long as they have conductivity, and examples thereof include the following. (i) Carbon particles or powder (ii) Nickel, indium, chromium, gold, vanadium, tin, cadmium, silver, platinum, aluminum, copper, titanium, cobalt, lead and other metals or alloys or conductive oxides thereof Particles or powder (iii) Plastic particles such as polystyrene, polyethylene, etc. with a coating layer of the conductive material (i) or (ii) formed on the surface.If the particle size of these conductive particles is excessively large, Because it affects the transmission and the thickness of the transparent conductive film,
It is preferably 0.5 mm or less. The preferred particle size of the conductive particles is 0.01 to 0.5 mm.

When the mixing ratio of the conductive particles in the transparent conductive film is too large, the light transmittance is impaired, and when the mixing ratio is too small, the electromagnetic wave shielding property is insufficient. The proportion is preferably about 0.1 to 50% by weight, particularly about 0.1 to 20% by weight, especially about 0.5 to 20% by weight.

The color and gloss of the conductive particles are appropriately selected according to the purpose. However, from the use as a filter of a display panel, a dark and matte black or brown color is preferred. In this case, by adjusting the light transmittance of the filter appropriately by the conductive particles, there is also an effect that the screen becomes easy to see.

Examples of the base film having a transparent conductive layer formed thereon include a transparent conductive layer formed of tin indium oxide, zinc aluminum oxide, or the like formed by vapor deposition, sputtering, ion plating, CVD, or the like. . In this case, if the thickness of the transparent conductive layer is less than 0.01 μm, the thickness of the conductive layer for shielding electromagnetic waves is too thin,
Sufficient electromagnetic wave shielding properties cannot be obtained, and if it exceeds 5 μm, light transmittance may be impaired.

As the matrix resin of the transparent conductive film or the resin of the base film, polyester, polyethylene terephthalate (PET), polybutylene terephthalate, polymethyl methacrylate (PM)
MA), acrylic plate, polycarbonate (PC), polystyrene, triacetate film, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl butyral, metal ion-crosslinked ethylene-methacrylic acid copolymer , Polyurethane, cellophane, etc., preferably PE
T, PC, and PMMA.

The thickness of such a transparent conductive film is
Usually, it is about 1 μm to 5 mm.

By providing a transparent conductive film,
Even better electromagnetic wave shielding properties can be obtained.

The conductive mesh 5 interposed between the transparent substrate 2 and the PDP body 20 is made of a metal fiber and / or a metal-coated organic fiber. In order to prevent development, for example, a wire diameter of 1 μm to 200 μm, particularly 10 to 100 μm
m, aperture ratio 40-95%, especially 50-90%, pitch between grids 0.09-0.6 mm, especially 0.18-0.3 m
m is preferred. In this conductive mesh, when the wire diameter exceeds 200 μm, the electromagnetic wave shielding property is improved, but the mesh is visually recognized, so that the image quality is significantly reduced.
If it is less than 1 μm, the strength as a mesh decreases, and handling becomes extremely difficult. If the opening ratio exceeds 95%, it is difficult to maintain the shape as a mesh, and the opening ratio is 40%.
If it is less than 3, the light transmittance is low, and the amount of light from the display is reduced. If the interstitial pitch is less than 0.09 mm, the aperture ratio is small and the transmittance is low, and if it exceeds 0.6 mm, the mesh becomes visible.

The aperture ratio of the conductive mesh refers to the ratio of the area occupied by the openings in the projected area of the conductive mesh, and the pitch between lattices refers to the distance between the center lines of adjacent wires.

The above-mentioned wire diameter, aperture ratio and interstitial pitch are also suitable for a transparent film or a conductive net-like film formed on a transparent substrate. In this case, the wire diameter corresponds to the wire width.

Metals constituting the conductive mesh 5 and metals of the metal-coated organic fibers include copper, stainless steel, aluminum, nickel, titanium, tungsten, tin, and the like.
Lead, iron, silver, chromium, carbon or alloys thereof, preferably copper, stainless steel or aluminum are used.

As the organic material of the metal-coated organic fiber, polyester, nylon, vinylidene chloride, aramid, vinylon, cellulose and the like are used.

In the present invention, it is particularly preferable to use a conductive mesh made of a metal-coated organic fiber having excellent mesh shape maintaining characteristics in order to maintain the above-mentioned aperture ratio and wire diameter.

In the display panel 1 of FIG. 1, the edges of the conductive mesh 5 are the transparent substrate 2 and the PDP body 20.
Is larger than the transparent substrate 2 and the PDP main body 20 so that the transparent substrate 2 and the PDP main body 20 can be folded back along the edge of the PDP main body 20. It is preferable that the width of the conductive mesh 5 protruding from the transparent substrate 2 and the PDP body 20 is about 8 to 50 mm.

In the present invention, the adhesive resin for adhering the transparent substrate 2 and the PDP body 20 via the conductive mesh 5 and the near-infrared cut film 4 includes ethylene-vinyl acetate copolymer and ethylene-methyl acrylate. Polymer, ethylene- (meth) acrylic acid copolymer, ethylene-ethyl (meth) acrylate copolymer, ethylene-methyl (meth) acrylate copolymer, metal ion crosslinked ethylene- (meth) acrylic acid copolymer Combined, partially saponified ethylene-
Ethylene copolymers such as vinyl acetate copolymer, carboxyethylene-vinyl acetate copolymer, ethylene- (meth) acryl-maleic anhydride copolymer, and ethylene-vinyl acetate- (meth) acrylate copolymer ("(Meth) acryl" indicates "acryl or methacryl"). In addition, polyvinyl butyral (P
VB) A resin, an epoxy resin, an acrylic resin, a phenol resin, a silicone resin, a polyester resin, a urethane resin and the like can be used. However, the most balanced and easy-to-use in terms of performance is ethylene-vinyl acetate copolymer (EV).
A). Further, PV used in laminated glass for automobiles in terms of impact resistance, penetration resistance, adhesiveness, transparency, etc.
B resins are also suitable.

The PVB resin contains 70 to 95% by weight of a polyvinyl acetal unit, 1 to 15% by weight of a polyvinyl acetate unit, and has an average degree of polymerization of 200 to 3,000, preferably 3,
It is preferably from 00 to 2500, and the PVB resin is used as a resin composition containing a plasticizer.

Examples of the plasticizer for the PVB resin composition include organic plasticizers such as monobasic acid esters and polybasic acid esters, and phosphoric acid plasticizers.

The monobasic acid esters include butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptanoic acid, n-octylic acid, 2-ethylhexylic acid, pelargonic acid (n-
Esters obtained by the reaction of an organic acid such as nonylic acid) and decylic acid with triethylene glycol, and more preferably triethylene-di-2-ethylbutyrate and triethylene glycol-di-2-ethylhexo. Ethates, triethylene glycol-di-capronate, triethylene glycol-di-n-octoate and the like. Note that an ester of the above organic acid with tetraethylene glycol or tripropylene glycol can also be used.

As the polybasic acid ester-based plasticizer, for example, an ester of an organic acid such as adipic acid, sebacic acid or azelaic acid with a linear or branched alcohol having 4 to 8 carbon atoms is preferable, and more preferably. , Dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate and the like.

Examples of the phosphoric acid plasticizer include tributoxyethyl phosphate, isodecylphenyl phosphate, triisopropyl phosphate and the like.

In the PVB resin composition, if the amount of the plasticizer is small, the film-forming property is reduced, and if the amount is large, the durability and the like under heat resistance are impaired. 50 parts by weight, preferably 10-4
0 parts by weight.

The PVB resin composition may further contain additives such as a stabilizer, an antioxidant and an ultraviolet absorber for preventing deterioration.

Hereinafter, the adhesive layer according to the present invention will be described in more detail by exemplifying the case where EVA is used as the resin.

The EVA has a vinyl acetate content of 5 to 5
0% by weight, preferably 15-40% by weight is used. If the vinyl acetate content is less than 5% by weight, there is a problem in weather resistance and transparency, and if it exceeds 40% by weight, mechanical properties are remarkably deteriorated, film formation becomes difficult, and film mutual blocking occurs. .

As the cross-linking agent, in the case of heat cross-linking, an organic peroxide is suitable and is selected in consideration of sheet processing temperature, cross-linking temperature, storage stability and the like. Usable peroxides include, for example, 2,5-dimethylhexane-2,5-dihydroperoxide; 2,5-dimethyl-2,5-
Di (t-butylperoxy) hexane-3; di-t-butyl peroxide; t-butylcumyl peroxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexane; dicumyl peroxide Α, α'-
Bis (t-butylperoxyisopropyl) benzene;
n-butyl-4,4-bis (t-butylperoxy) valerate; 2,2-bis (t-butylperoxy) butane; 1,1-bis (t-butylperoxy) cyclohexane; 1,1- Bis (t-butylperoxy) -3,
3,5-trimethylcyclohexane; t-butylperoxybenzoate; benzoyl peroxide; tert-butylperoxyacetate; 2,5-dimethyl-2,5
-Bis (tert-butylperoxy) hexyne-3; 1,1
-Bis (tert-butylperoxy) -3,3,5-trimethylcyclohexane; 1,1-bis (tert-butylperoxy) cyclohexane; methyl ethyl ketone peroxide; 2,5-dimethylhexyl-2,5-bisper Oxybenzoate; tertiary butyl hydroperoxide; p-menthane hydroperoxide; p-chlorobenzoyl peroxide; tertiary butyl peroxyisobutyrate; hydroxyheptyl peroxide; chlorohexanone peroxide. These peroxides are used alone or as a mixture of two or more, usually in a proportion of 10 parts by weight or less, preferably 0.1 to 10 parts by weight, based on 100 parts by weight of EVA.

The organic peroxide is usually extruded to EVA,
It is kneaded by a roll mill or the like, but may be dissolved in an organic solvent, a plasticizer, a vinyl monomer or the like, and added to the EVA film by an impregnation method.

In order to improve the physical properties of EVA (mechanical strength, optical properties, adhesion, weather resistance, whitening resistance, crosslinking speed, etc.), various acryloxy or methacryloxy and allyl group-containing compounds are added. be able to. As the compound used for this purpose, acrylic acid or methacrylic acid derivatives, for example, esters and amides thereof are the most common, and ester residues include methyl, ethyl, dodecyl, stearyl, lauryl and other alkyl groups, as well as cyclohexyl groups. , A tetrahydrofurfuryl group, an aminoethyl group, a 2-hydroxyethyl group, a 3-hydroxypropyl group, and a 3-chloro-2-hydroxypropyl group. Further, esters with polyfunctional alcohols such as ethylene glycol, triethylene glycol, polyethylene glycol, trimethylolpropane, and pentaerythritol can also be used. As the amide, diacetone acrylamide is typical.

More specifically, polyfunctional esters such as acrylic or methacrylic esters such as trimethylolpropane, pentaerythritol and glycerin, triallyl cyanurate, triallyl isocyanurate, diallyl phthalate, diallyl isophthalate, and maleic Allyl group-containing compounds, such as diallyl acid, are listed. These may be used alone or as a mixture of two or more.
0.1 to 2 parts by weight, preferably 0.5 to 0 parts by weight
To 5 parts by weight.

When EVA is crosslinked by light, a photosensitizer is used in an amount of usually 10 parts by weight or less, preferably 0.1 to 10 parts by weight, per 100 parts by weight of EVA instead of the above-mentioned peroxide.

In this case, usable photosensitizers include
For example, benzoin, benzophenone, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, dibenzyl, 5-nitroacenaphthene, hexachlorocyclopentadiene, p-nitrodiphenyl, p-nitroaniline, 2,4,6-triene Nitroaniline, 1,2-benzanthraquinone, 3-methyl-1,3-diaza-
1,9-benzanthrone and the like;
Species can be used alone or in combination of two or more.

In this case, a silane coupling agent is used in combination as an accelerator. As the silane coupling agent, vinyltriethoxysilane, vinyltris (β
-Methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, γ-glycidoxypropyltrimethoxysilane, γ
-Glycidoxypropyltriethoxysilane, β-
(3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-chloropropylmethoxysilane, vinyltrichlorosilane, γ-mercaptopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N
-Β (aminoethyl) -γ-aminopropyltrimethoxysilane and the like.

These silane coupling agents are usually EV
One or more kinds are mixed and used at a ratio of 0.001 to 10 parts by weight, preferably 0.001 to 5 parts by weight with respect to 100 parts by weight of A.

The adhesive resin film according to the present invention may further contain a small amount of an ultraviolet absorber, an infrared absorber, an antioxidant, and a paint processing aid, and may adjust the color of the filter itself. For this purpose, an appropriate amount of a coloring agent such as a dye or a pigment, or a filler such as carbon black, hydrophobic silica or calcium carbonate may be blended.

As means for improving the adhesiveness, means such as corona discharge treatment, low-temperature plasma treatment, electron beam irradiation, and ultraviolet light irradiation on the surface of the adhesive resin film formed into a sheet are also effective.

The adhesive resin film according to the present invention is prepared by mixing the adhesive resin with the above-mentioned additives, kneading the mixture with an extruder, a roll or the like, and then forming the mixture by a film forming method such as calender, roll, T-die extrusion, or inflation. It is manufactured by forming a sheet into the shape of During film formation, embossing is applied to prevent blocking and facilitate degassing during pressure bonding with a transparent substrate.

The thickness of the adhesive layer formed by the conductive mesh 5 and the near-infrared cut film 4 and the adhesive resin varies depending on the use of the display panel and the like, but is usually about 2 μm to 2 mm. . Therefore, the adhesive resin films 3A, 3B, and 3C are formed in such a thickness that an adhesive layer having such a thickness is obtained.

To manufacture the display panel 1 shown in FIG.
A transparent substrate 2 on which an antireflection film 8 is formed, and a PDP body 20
And a near-infrared cut film 4, a conductive mesh 5, an adhesive resin film 3A, 3B, 3C and a conductive adhesive tape 7, and the near-infrared cut film 4 is laminated with the PDP body 20 via the adhesive resin film 3C. Then, the conductive mesh 5 sandwiched between the adhesive resin films 3A and 3B is laminated between the transparent substrate 2 and the PDP body 20 so as to have a predetermined bias angle, and the adhesive resin films 3A to 3B are laminated. After being integrated under pressure or by heating or light irradiation under curing conditions of 3C, the protruding peripheral portion of the conductive mesh 5 is folded back along the edge portion of the PDP body 20, and further, the edge portion of the surface of the transparent substrate 2 The conductive adhesive tape 7 is attached so as to reach the edge of the surface of the PDP body 20 from above.

When a cross-linked conductive pressure-sensitive adhesive tape is used as the conductive pressure-sensitive adhesive tape 7, when the cross-linked conductive pressure-sensitive adhesive tape 7 is applied, the adhesive is applied to the laminate by utilizing the adhesiveness of the adhesive layer 7b. The temporary fixing can be re-attached as necessary.) Then, heating or ultraviolet irradiation is performed while applying pressure as necessary. Heating may also be performed at the time of this ultraviolet irradiation. In addition, by locally performing the heating or the light irradiation, it is possible to adhere only a part of the cross-linkable conductive adhesive tape.

[0098] Heat bonding can be easily performed with a general heat sealer. As a method of heating under pressure, a laminate having a cross-linked conductive adhesive tape stuck therein is placed in a vacuum bag and degassed. A method of heating may be used, and bonding can be performed very easily.

As the bonding conditions, in the case of thermal crosslinking,
Although it depends on the type of the crosslinking agent (organic peroxide) to be used, it is usually 70 to 150 ° C, preferably 70 to 130 ° C, and usually 10 seconds to 120 minutes, preferably 20 seconds to 60 minutes.

In the case of photocrosslinking, the light source is ultraviolet to
Many light sources that emit light in the visible region can be used, and examples thereof include ultra-high pressure, high pressure, low pressure mercury lamps, chemical lamps, xenon lamps, halogen lamps, mercury halogen lamps, carbon arc lamps, incandescent lamps, and laser light.
The irradiation time is not generally determined depending on the type of the lamp and the intensity of the light source, but is usually several tens seconds to several tens of minutes. After heating to 40 to 120 ° C. in advance to promote cross-linking, this may be irradiated with ultraviolet rays.

The pressure at the time of bonding is also appropriately selected, and is usually 5 to 50 kg / cm ² , particularly 10 to 30 kg / cm ² .
/ Cm ² is preferably applied.

The display panel 1 to which the conductive adhesive tape 7 has been attached in this manner can be very simply and easily incorporated into the housing simply by fitting it into the housing.
Good conduction between the conductive mesh 5 and the housing via the conductive adhesive tape 7 can be uniformly obtained at the peripheral portion. Therefore, a good electromagnetic wave shielding effect can be obtained.

The display panel shown in FIG. 1 is an example of the display panel of the present invention, and the present invention is not limited to the illustrated one. For example, as described above, a transparent conductive film may be provided instead of the near infrared cut film, or a transparent conductive film may be formed directly on the plate surface of the PDP body 20. . As such a display panel, a display panel in which the following transparent conductive film is formed on the PDP main body 20 is exemplified.

A lattice-like or punching metal-like metal film formed by etching a predetermined pattern on a plate surface of a PDP main body by a process of photoresist coating, pattern exposure and etching. A grid or punched metal printed film formed by pattern printing of conductive ink on the plate surface of the PDP body.

Further, the display panel of the present invention may be one in which a metal foil formed into a grid or punching metal by pattern etching is adhered to the transparent substrate instead of the transparent conductive film.

Further, the periphery of the laminate in which the conductive mesh 5 is adhered to the PDP main body 20 to which the near-infrared cut film 4 has been adhered with the adhesive resin film 3B is attached in advance to another conductive adhesive tape (preferably, After fixing with a cross-linked conductive adhesive tape), the transparent substrate 2 may be bonded.

Further, the transparent substrate 2 on the periphery of the conductive mesh 5
In addition, the portion protruding from the PDP main body 20 can be reinforced with another conductive member, a conductive tape, or the like. Also,
Various kinds of electrode processing may be performed such that a part or all of the outer periphery of the conductive mesh is covered with a conductive tape or covered with a conductive ink.

Such a display panel of the present invention is a PDP.
Although it is very suitable as a front filter of the above or as a window material of a place where precision equipment is installed such as a hospital or a laboratory, the electromagnetic wave shielding light transmitting window material of the present invention has a pixel pitch of 0.5 to 1 in particular. 0.6 mm, especially 1.0-1.3 mm
Is suitable as a front panel of a PDP in the range of.

[0109]

The present invention will be described more specifically with reference to the following examples.

The adhesive resin film used in the examples was manufactured as follows. [Production of Adhesive Resin Film] 100 parts by weight of ethylene-vinyl acetate copolymer (Ultracene 634 manufactured by Toyo Soda Co., Ltd .: vinyl acetate content 26%, melt index 4)
1,1-bis (t-butylperoxy) -3,3,5-
Trimethylcyclohexane (Perhexa 3 manufactured by NOF Corporation)
M) 1 part by weight, 0.1 part by weight of γ-methacryloxypropyltrimethoxysilane, 2 parts by weight of diallyl phthalate,
Then, 0.5 parts by weight of Sumisolve 130 (manufactured by Sumitomo Chemical Co., Ltd.) as an ultraviolet absorber was mixed, and a double-sided embossed adhesive resin film having a thickness of 200 μm was prepared using a 40 mm extruder.

Example 1 A rectangular float glass plate having a thickness of 2 mm was used as the front-side transparent substrate 2, and a PDP light-emitting panel body having a screen size of 40 inches and a pixel pitch of 1.26 mm (RGB cells 0.42 mm) was used. A resin film for bonding 3A to 3N with a near infrared cut film 4 and a conductive mesh 5 interposed therebetween.
The display panel 1 shown in FIG. 1 was produced by integrating using 3C and the conductive adhesive tape 7.

The near-infrared cut film 4 used was a PET film on which a near-infrared cut coat of a silver thin film was applied. Further, as the conductive mesh 5, a polyester fiber having a wire diameter of 40 μm coated with copper and nickel plating was used. The grid lines of the conductive mesh are substantially parallel at regular intervals and are substantially orthogonal.
As the conductive mesh, those having various interstitial pitches and aperture ratios shown in Table 1 were used, and each conductive mesh was distributed at various bias angles shown in Table 1.

With respect to the obtained display panel, the state of occurrence of moire between the pixels and the conductive mesh was observed, and the results are shown in Table 1.

As apparent from Table 1, the bias angle 1
Clear images without moiré were obtained in the region of 5 to 22 ° and the region of about 40 °. On the other hand, when the bias angle is out of this range, moire fringes having a period of 2 to 20 mm are generated, and the display quality is poor.

[0115]

[Table 1]

From the above results, according to the display panel of the present invention in which the bias angle is set with respect to the conductive mesh,
It can be seen that moire development can be effectively prevented.

[0117]

As described above in detail, according to the display panel of the present invention, by integrating an electromagnetic wave shielding material with the PDP, the display panel itself is given a function such as an electromagnetic wave shielding property, and the display panel has a light weight. It is possible to improve productivity and reduce cost by reducing the thickness and the number of parts.
In addition, malfunction of the remote controller can be prevented.

Further, according to the present invention, the frequency of occurrence of moiré development is greatly reduced, and the product yield can be drastically improved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a display panel of the present invention.

FIG. 2 is a partially cutaway perspective view showing a configuration of a general PDP.

FIG. 3 is a plan view illustrating a bias angle between a conductive mesh and a transparent substrate.

FIG. 4 is a plan view showing a distribution angle of a conventional conductive mesh.

FIG. 5 is a schematic plan view illustrating a bias angle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display panel 2 Transparent substrate 3A, 3B, 3C Adhesive resin film 4 Near-infrared cut film 5 Conductive mesh 5A Warp 5B Weft 7 Conductive adhesive tape 7a Metal foil 7b Adhesive layer 8 Anti-reflection film 20 PDP main body 21 Front plate 22 Back plate 23 Partition wall 24 Display cell 25 Auxiliary cell 26 Cathode 27 Display anode 28 Auxiliary anode

Claims (5)

[Claims] 1. A substantially rectangular plasma display panel main body and a front surface of the plasma display panel main body.
What is claimed is: 1. A display panel comprising: a substantially rectangular transparent substrate joined via a grid made of a conductive wire, wherein the grid made of the conductive wire extends at substantially parallel and equal intervals. And a second wire group extending at substantially equal intervals in a direction substantially orthogonal to the first wire group, and the extending direction of the first wire group and the length of the substantially rectangular transparent substrate. The bias angle defined by the smaller one of the intersection angle with the side and the intersection angle between the extending direction of the second wire group and the long side of the substantially rectangular transparent substrate is smaller than 10 °. A display panel characterized by being large. 2. The grid according to claim 1, wherein the grid made of the conductive wire is a conductive mesh formed by weaving the conductive wire in a grid, or a grid formed on a transparent film or a transparent substrate. A display panel, wherein the display panel is a conductive net-like film. 3. The plasma display panel according to claim 1, wherein a pixel pitch of the plasma display panel main body is 0.5 to 1.6.
mm, wherein the grid pitch of the grid made of the conductive wire is 0.09 to 0.6 mm. 4. The plasma display panel according to claim 3, wherein a pixel pitch of the plasma display panel main body is in a range of 1.0 to 1.3 mm, and a grid pitch of the conductive wire rod is 0.18 to 0.3 mm. And the bias angle is 1
A display panel, wherein the angle is 5 to 22 ° or 36 to 42 °. 5. The lattice according to claim 1, wherein the grid made of the conductive wire mainly comprises an ethylene-vinyl acetate copolymer between the plasma display panel main body and a transparent substrate. A display panel, which is bonded with a transparent adhesive.