JPH11119668A - Display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a function such as electromagnetic wave shielding property to a display panel itself by forming an electrically conductive layer obtained by etching an electrically conductive film on the adhesion surface side of a transparent substrate and to enhance the productivity of the display panel and to reduce the manufacturing cost thereof by making the display panel lightweight and thin and reducing the number of parts. SOLUTION: The display panel 1 is constituted so that a hot-wire cut film 5 is laminated between the transparent substrate 2 on which the pattern-etched metallic film 3 is formed and a PDP main body 20, made to adhere and integrated on the adhesion surface side by using intermediate films for adhesion 4A and 4B being adhesive agent. Since the electrically conductive film 3 can be etched to form a desired pattern by this pattern etching, the degree of the freedom of a wire diameter, a gap and a mesh shape is particularly enhanced in comparison with an electrically conductive mesh. Thus, excellent electromagnetic wave shielding performance is realized by the pattern-etched electrically conductive film 3 whose electromagnetic wave shielding property and light transmissivity are excellent and which is formed so that a moire phenomenon is not caused.

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.
, 21 is a front panel (front glass), 22 is a rear panel (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 it is discharged by the applied 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.

For this reason, conventionally, a transparent plate having a function of shielding electromagnetic waves and the like is arranged on the front surface of the PDP in order to shield electromagnetic waves and the like from the PDP.

[0006]

A transparent panel provided separately 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 a transparent substrate such as glass is required for both the PDP and the electromagnetic wave shielding transparent plate, the provision of the PDP and the electromagnetic wave shielding transparent plate increases the thickness and the weight. The number of parts and the number of production steps increase, which leads to an increase in cost.

[0007] By the way, a conductive mesh material such as a wire mesh is used as the electromagnetic wave shielding material of the ordinary electromagnetic wave shielding light transmitting window material. However, in order to obtain a sufficient electromagnetic wave shielding property by the conductive mesh. However, it is necessary to make the mesh of the mesh considerably fine. In that case, since a grid-like object is placed on the front of the PDP of the OA device, phenomena such as blurred images occur, and clear images cannot be obtained. In addition, interference fringes (so-called moire) are generated between the number of dots of the PDP and the grid of the mesh, and this phenomenon makes the image difficult to see.

[0008] 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 capable of preventing a moire phenomenon when a conductive mesh is used as an electromagnetic wave shielding material, and having a high light transmittance and a high electromagnetic wave shielding property and capable of obtaining a clear image. With the goal.

[0010]

The display panel of the present invention comprises:
What is claimed is: 1. A display panel comprising: a plasma display panel main body; and a transparent substrate adhered to a front surface of the plasma display panel main body by a transparent adhesive, wherein a conductive film is pattern-etched on an adhesive surface side of the transparent substrate. The conductive layer is formed as follows.

In the display panel of the present invention, since the PDP, the electromagnetic wave shielding material, and the transparent substrate on which the conductive layer is formed are integrated with a transparent adhesive, the weight and thickness of the display panel can be reduced.
It is possible to improve productivity and reduce cost by reducing the number of parts.

Further, according to the pattern etching, since the conductive film can be etched into a desired pattern shape, the degree of freedom of the wire diameter, the interval, and the mesh shape is much larger than that of the conductive mesh.

[0013] Therefore, good electromagnetic wave shielding performance can be realized by a pattern-etched conductive film which has both good electromagnetic wave shielding properties and light transmittance and does not cause a moire phenomenon.

When a normal adhesive is used for bonding and integrating the PDP body and the transparent substrate, when the display panel is damaged by an impact or the like, fragments are scattered, which is a problem in terms of safety. By using a transparent elastic adhesive as the adhesive, it is possible to prevent the fragments from being scattered when the display panel is damaged by impact or the like, and to enhance safety.

[0015]

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

FIG. 1 is a schematic sectional view showing an embodiment of a display panel of the present invention, and FIGS. 3A to 3F are plan views showing examples of an etching pattern.

The display panel 1 has a transparent substrate 2 on which a pattern-etched metal film 3 is formed and a PDP body 20 (the PDP body shown in FIG. 2 and other general PDPs). The main body can be applied.), And the heat ray cut films 5 are laminated and bonded and integrated using the bonding intermediate films 4A and 4B serving as adhesives.

In the present embodiment, the conductive adhesive tape 7 is made of a transparent substrate 2, a heat ray cut film 5, and a PDP.
In the entire periphery of the laminate of the main body 20, the adhesive adheres to the entire end face and goes around the front and back corners of the laminate to form an edge of the plate surface of the transparent substrate 2 and the plate surface of the back plate of the PDP body 20. It is attached so as to adhere to both edges.

The conductive adhesive tape 7 is, for example, a metal foil 7
A is formed by forming a conductive adhesive layer 7B on one surface of A. As the metal foil 7A of the conductive adhesive tape 7, a foil of copper, silver, nickel, aluminum, stainless steel, or the like having a thickness of about 1 to 100 μm can be used.

The conductive adhesive layer 7B is formed by applying an adhesive in which conductive particles are dispersed on one surface of such a metal foil 7A.

As the adhesive, an epoxy or phenol resin mixed with a hardener, an acrylic adhesive, a rubber adhesive, a silicone adhesive, or the like can be used.

The conductive particles dispersed in the adhesive include:
As long as it is an electrically good conductor, various conductors can be used. For example, metal powder such as copper, silver, nickel, tin oxide, indium tin oxide, metal oxide powder such as zinc oxide, resin or ceramic powder coated with such metal or metal oxide, etc. Can be used. There is no particular limitation on the shape, and any shape such as scaly, dendritic, granular, pellet-like, spherical, star-like, sugar-like (granular with a large number of protrusions), etc. can be taken. .

The amount of the conductive particles is preferably 0.1 to 15% by volume based on the adhesive, and the average particle size is preferably 0.1 to 100 μm.

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

The constituent material of the transparent substrate 2 is glass,
Polyester, polyethylene terephthalate (PE
T), polybutylene terephthalate, polymethyl methacrylate (PMMA), acrylic plate, polycarbonate (PC), polystyrene, triacetate film,
Polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl butyral, metal ion cross-linked ethylene
Methacrylic acid copolymer, polyurethane, cellophane, etc., preferably, glass, PET, PC, PMMA are mentioned.

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.

An antireflection film 6 is formed on the surface of the transparent substrate 2 on the front side. Examples of the antireflection film 6 formed on the surface side of the transparent substrate 2 include a laminated film of a high refractive index transparent film and a low refractive index transparent film, for example, a laminated film having the following laminated structure.

(A) A high-refractive-index transparent film and a low-refractive-index transparent film are laminated one by one in a total of two layers. (C) a laminate of three layers, one layer each in the order of medium refractive index transparent film / high refractive index transparent film / low refractive index transparent film, and (d) high refractive index transparent film / low refractive index A transparent film in which three layers are alternately laminated in a total of six layers. The high refractive index transparent film is made of ITO (tin indium oxide), 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,
SiO ₂ , MgF ₂ , Al ₂ O as 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 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 6 so as to enhance the anti-staining property of the surface. 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.

The front surface of the transparent substrate 2 may be 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.

The metal of the metal film 3 formed on the bonding surface side of the transparent substrate 1 is copper, stainless steel, chromium, aluminum, nickel, iron, brass, or an alloy thereof, preferably copper, stainless steel, aluminum, chromium. Is used.

As a method of forming such a metal film 3 on a transparent substrate, a method such as electroless plating, vacuum deposition, sputtering, or chemical vapor deposition can be employed.

If the thickness of the metal film 3 is too small, the electromagnetic wave shielding property is insufficient, which is not preferable. If the thickness is too large, the thickness of the display panel obtained is affected, or the time required for the etching process becomes long. , 0.01-50 μm
It is preferable to set the degree.

As a method of pattern-etching such a metal film, any method generally used may be used, but photo-etching using a resist is preferable. In this case, after a photoresist is coated on the metal film, pattern exposure is performed using a desired mask or the like, and development processing is performed to form a resist pattern. Thereafter, the portion of the metal film where there is no resist may be removed with an etching solution such as a ferrous chloride solution.

According to the pattern etching, the degree of freedom of the pattern is large, and the metal film can be etched to an arbitrary wire diameter, an interval and a hole shape. Therefore, there is no moire phenomenon, and the desired electromagnetic wave shielding property and light transmission can be obtained. The conductive layer having the property can be easily formed.

In the present invention, the shape of the etching pattern of the metal film is not particularly limited.
3 (c), 3 (d), 3 (e), 3 (c), 3 (c), 3 (c), 3 (c), 3 (c), 3 (c), and 3 (c) show grid-like metal films 3A and 3B in which square holes M are formed.
A metal film 3C, 3 having a circular, hexagonal, triangular or elliptical hole M as shown in FIG.
D, 3E, 3F and the like. In addition, the hole M
The moiré phenomenon can be prevented as a random pattern in addition to the ones arranged regularly.

In order to secure both the electromagnetic wave shielding property and the light transmittance, the area ratio of the opening portion on the projection surface of the metal film (hereinafter referred to as "opening ratio") may be 20 to 90%. preferable.

When the aperture ratio is increased in order to improve the light transmittance, a transparent conductive film is formed on the transparent substrate 2 or the front plate of the PDP main body 20 or the heat ray cut film 5 and the metal foil 3 is used. The shortage of the electromagnetic wave shielding property may be compensated.

As the heat ray cut film 5, a film obtained by applying a heat ray cut coat such as a thin film of zinc oxide or silver on a base film can be used. The base film is preferably made of PET, PC, PMMA or the like. Can be used. This film is preferably about 10 μm to 20 mm in order to ensure handleability and durability without excessively increasing the thickness of the obtained display panel. The thickness of the heat ray cut coat formed on the base film is usually 500
５5000 °.

In the present invention, the transparent substrate 2 on which the pattern-etched metal film 3 is formed, the heat ray cut film 5
And an adhesive resin for bonding the PDP body 20 includes ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene- (meth) acrylic acid copolymer,
Ethylene-ethyl (meth) acrylate copolymer, ethylene-methyl (meth) acrylate copolymer, metal ion crosslinked ethylene- (meth) acrylic acid copolymer, partially saponified ethylene-vinyl acetate copolymer, carboxylation Ethylene-vinyl acetate copolymer, ethylene- (meth) acryl-
Examples include ethylene-based copolymers such as a maleic anhydride copolymer and an ethylene-vinyl acetate- (meth) acrylate copolymer ("(meth) acryl" indicates "acryl or methacryl").

In the present invention, it is preferable to use a transparent and elastic resin as the adhesive resin. Examples of such a transparent adhesive resin include those usually used as an adhesive for laminated glass. In particular, ethylene-vinyl acetate copolymer (EVA) is the most balanced and easy to use in terms of performance. Further, PVB resins used in laminated glass for automobiles are also suitable in terms of impact resistance, penetration resistance, adhesiveness, transparency and the like.

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. .

When crosslinking by heating, an organic peroxide is suitable as the crosslinking agent, and is selected in consideration of sheet processing temperature, crosslinking 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 singly or as a mixture of two or more, and are usually used in an amount of 5 parts by weight or less, preferably 0.5 to 5.0 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.

To improve the physical properties of EVA (mechanical strength, optical properties, adhesion, weather resistance, whitening resistance, cross-linking 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 And allyl group-containing compounds such as diallyl acid. These compounds may be used alone or as a mixture of two or more.
0.1 to 2 parts by weight, preferably 0.5 to 2 parts by weight
5 parts by weight are used.

When EVA is crosslinked by light, a photosensitizer is used in place of the above-mentioned peroxide, usually in an amount of 5 parts by weight or less, preferably 0.1 to 3.0 parts by weight, per 100 parts by weight of EVA.

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 adhesion promoter. Examples of the silane coupling agent include 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.

On the other hand, the PVB resin contains 70 to 95% by weight of a polyvinyl acetal unit and 1 to 50% by weight of a polyvinyl acetate unit.
It is preferably 15% by weight and the average degree of polymerization is 200 to 3000, preferably 300 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 plasticizer, for example, an ester of an organic acid such as adipic acid, sebacic acid, azelaic acid and 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. Therefore, the plasticizer is added in an amount of 5 to 100 parts by weight of polyvinyl butyral resin. 50 parts by weight, preferably 10-4
0 parts by weight.

The resin composition of the adhesive interlayer according to the present invention further comprises a stabilizer, an antioxidant, an ultraviolet absorber, an infrared absorber, an antioxidant, a paint processing aid,
It may contain a small amount of a coloring agent and the like, and in some cases, may contain a small amount of a filler such as carbon black, hydrophobic silica and calcium carbonate.

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 bonding intermediate film formed into a sheet are also effective.

The adhesive interlayer according to the present invention is, for example, E
It is manufactured by mixing VA or PVB with the above-mentioned additives, kneading with an extruder, a roll, or the like, and then forming a sheet into a predetermined shape by a film forming method such as a calendar, a roll, T-die extrusion, or inflation. . During film formation, embossing is applied to prevent blocking and facilitate degassing during pressure bonding with the transparent substrate or the front plate of the PDP body.

The display panel 1 shown in FIG. 1 uses, for example, the bonding intermediate films 4A and 4B formed as described above, and sandwiches the heat ray cut film 5 between the bonding intermediate films 4A and 4B. It is interposed between the PDP body 20 and the transparent substrate 2 on which the metal film 3 has been formed by pattern etching in advance on the bonding surface side, degassed under reduced pressure, heated, and pre-pressed, and then heated or It can be easily manufactured by curing and integrating the adhesive layer by light irradiation.

The adhesive intermediate films 4A and 4B are formed to have a thickness of 1 μm to 1 m so that the thickness of the adhesive layer is not excessively increased.
m thickness.

Transparent substrate 2, heat ray cut film 5 and P
After the DP main body 20 is integrated, the conductive pressure-sensitive adhesive tape 7 is wrapped around the laminate to be fastened, and is adhered and fixed by, for example, thermocompression bonding according to the method of curing the conductive pressure-sensitive adhesive tape 7 used.

In order to ensure conduction between the conductive adhesive tape 7 and the metal film 3, a conductive tape or the like is attached to the periphery of the transparent substrate 2 on which the metal film 3 is formed so as to protrude from the periphery. It is preferable to form a conductive portion by, for example, attaching the conductive tape to the side of the laminate with the conductive adhesive tape 7.

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 being fitted into the housing.
Good conduction between the metal film 3 that has been pattern-etched via the conductive adhesive tape 7 and the housing can be uniformly achieved in the outer peripheral direction. Therefore, a good electromagnetic wave shielding effect can be obtained.

[0065]

As described in detail above, according to the display panel of the present invention, the display panel itself is provided with a function such as electromagnetic wave shielding by integrating a transparent substrate having a conductive layer formed on the PDP. It is possible to improve the productivity and reduce the cost by reducing the weight and thickness of the display panel and reducing the number of parts. In addition, malfunction of the remote controller can be prevented.

In addition, in the present invention, in order to obtain an electromagnetic wave shielding effect, a transparent substrate on which a conductive film subjected to pattern etching is formed is used. Light transmittance can be obtained, and a clear image can be obtained by preventing a moire phenomenon or the like.

The display panel of the present invention comprises a transparent substrate on which a conductive film has been formed by pattern etching in advance and a PDP.
It can be easily manufactured by bonding and integrating the main body.

According to the display panel of the second aspect, it is possible to prevent the fragments from being scattered at the time of breakage, and to enhance the safety.

[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 showing an example of an etching pattern.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display panel 2 Transparent substrate 3, 3A, 3B, 3C, 3D, 3E, 3F Metal film 4A, 4B Intermediate film 5 Heat ray cut film 6 Anti-reflection film 7 Conductive adhesive tape 7A Metal foil 7B Adhesive layer 20 PDP main body 21 Front Face plate 22 back plate 23 partition wall 24 display cell 25 auxiliary cell 26 cathode 27 display anode 28 auxiliary anode

Claims (2)

[Claims] 1. A display panel comprising: a plasma display panel main body; and a transparent substrate adhered to a front surface of the plasma display panel main body with a transparent adhesive, wherein a conductive surface is provided on an adhesive surface side of the transparent substrate. A display panel, wherein a conductive layer formed by pattern-etching a film is formed. 2. The display panel according to claim 1, wherein the transparent adhesive is a transparent elastic adhesive.