JP2005243509A - Front filter for plasma display and plasma display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front filter for a plasma display which can prevent double reflection in a plasma display and makes possible the thinning of the plasma display and is of low cost, and the plasma display which has no double reflection and is made thin. <P>SOLUTION: This front filter 10 for the plasma display has a film 16 having a substrate and one or more functional layers having at least one kind of a function selected from a group made of an electromagnetic wave shield function, a near infrared rays shielding function, a reflection preventing function, and a color correction function, and an adhesion layer 17 formed on one side of this film 16. This front filter has a heat radiation function and/or a heat insulation function. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a front filter for a plasma display and a plasma display.

  Image display on a plasma display panel (hereinafter also referred to as PDP) is performed, for example, as follows. When xenon or neon filled in the PDP is excited by discharge, a line spectrum from the ultraviolet region to the near-infrared region is generated, and when the ultraviolet ray hits the phosphor, the phosphor emits visible light for image display. Light is generated.

Thus, near infrared rays other than visible light are generated from the PDP, and this may cause malfunction of infrared remote controllers such as plasma display devices and video devices. In addition, electromagnetic waves generated along with the discharge also leak from the PDP. Furthermore, orange light emission may occur from neon filled in the PDP, and the color tone of the image may be out of order.
In addition, when external light is inserted into the front surface of the PDP, the contrast of the image is lowered by the reflected light, making it difficult to see the screen.

  For this reason, in a plasma display, an optical filter in which an electromagnetic wave shielding layer, a near-infrared cut layer, a color correction layer, and an antireflection layer are laminated on a substrate made of tempered glass is disposed on the front surface of the PDP, thereby Prevention of near-infrared leakage, near-infrared leakage, color tone correction, and reflection of outside light.

  Further, the surface temperature of the front surface of the PDP may reach about 90 ° C. However, the front surface of the PDP is cooled by arranging this optical filter with a gap for air cooling in front of the PDP. At the same time, by arranging an optical filter with a gap in front of the PDP, it protects the front of the PDP made of tempered glass from direct impact from the outside, and prevents damage to the front of the PDP.

  By the way, the plasma display is required to be thin. However, the above-described plasma display is not sufficient in terms of thinning because a gap for air cooling is provided. Moreover, the presence of the air-cooling gap causes a problem that the external light is reflected twice between the filter and the front surface of the PDP, and the contour of the image is blurred. Furthermore, since the optical filter itself is manufactured by sequentially laminating films for forming each layer on tempered glass, the cost is high and the yield is poor.

In order to prevent double reflection, it has been proposed that an optical film composed of an electromagnetic wave shielding layer, an infrared absorption layer, and an antireflection layer is directly attached to the front surface of the PDP through an adhesive layer. However, simply attaching an optical film to the front surface of the PDP causes the heat of the PDP to be transferred to the optical film, so that the optical film is likely to be deteriorated by being exposed to high temperature for a long time, and its function is also likely to be reduced. Further, there is a possibility that the hand touches the optical film that has become hot. Therefore, in practice, an optical filter in which an antireflection layer is formed on both sides of the tempered glass is separately arranged with an air cooling gap in front of the optical film, so that the optical film is not directly touched by hands, It is necessary to air-cool the optical film (see Patent Document 1).
JP 2000-156182 A

  Therefore, an object of the present invention is to prevent double reflection in a plasma display, to enable thinning of the plasma display, and to achieve a low-cost front filter for plasma display, and to be thin without double reflection. It is to provide a plasma display.

  That is, the front filter for a plasma display of the present invention has a function of one or more layers having at least one function selected from the group consisting of a base material, an electromagnetic wave shielding function, a near-infrared shielding function, an antireflection function, and a color correction function. A film having a layer and a heat dissipation layer; and an adhesive layer formed on one side of the film.

  Further, the front filter for plasma display of the present invention has a function of one or more layers having a base material and at least one function selected from the group consisting of an electromagnetic wave shielding function, a near infrared ray blocking function, an antireflection function and a color correction function. A film having a layer and a heat shielding layer; and an adhesive layer formed on one side of the film.

  Further, the front filter for plasma display of the present invention has a function of one or more layers having a base material and at least one function selected from the group consisting of an electromagnetic wave shielding function, a near infrared ray blocking function, an antireflection function and a color correction function. A film having a layer, a heat dissipation layer, and a heat shielding layer; and an adhesive layer formed on one side of the film, wherein the heat dissipation layer is located between the heat shield layer and the adhesive layer. It is a feature.

  Further, the front filter for plasma display of the present invention has a function of one or more layers having a base material and at least one function selected from the group consisting of an electromagnetic wave shielding function, a near infrared ray blocking function, an antireflection function and a color correction function. A front filter for a plasma display having a film having a layer; and an adhesive layer formed on one side of the film, wherein the front filter has a heat dissipation function.

  Further, the front filter for plasma display of the present invention has a function of one or more layers having a base material and at least one function selected from the group consisting of an electromagnetic wave shielding function, a near infrared ray blocking function, an antireflection function and a color correction function. A front filter for plasma display, comprising: a film having a layer; and an adhesive layer formed on one side of the film, wherein the front filter has a heat shielding function.

  Further, the front filter for plasma display of the present invention has a function of one or more layers having a base material and at least one function selected from the group consisting of an electromagnetic wave shielding function, a near infrared ray blocking function, an antireflection function and a color correction function. A front filter for plasma display, comprising: a film having a layer; and an adhesive layer formed on one side of the film, wherein the adhesive layer has a heat dissipation function.

  Further, the front filter for plasma display of the present invention has a function of one or more layers having a base material and at least one function selected from the group consisting of an electromagnetic wave shielding function, a near infrared ray blocking function, an antireflection function and a color correction function. A front filter for a plasma display having a film having a layer; and an adhesive layer formed on one side of the film, wherein the adhesive layer has a heat shielding function.

Here, the functional layer is preferably a multilayer thin film layer formed of a plurality of transparent thin film layers and a metal thin film layer sandwiched between the transparent thin film layers.
The adhesive layer preferably has a color correction function.
The pressure-sensitive adhesive layer preferably has a multilayer structure composed of a plurality of pressure-sensitive adhesive layers and a pressure-sensitive adhesive layer substrate sandwiched between the pressure-sensitive adhesive layers.
The base material is preferably a multilayer base material composed of two or more base materials.
Moreover, it is desirable that the base material has an ultraviolet cut function.

  The plasma display of the present invention comprises a plasma display panel and a front filter for plasma display of the present invention bonded to the front surface of the plasma display panel.

  Since the front filter for plasma display of the present invention has a heat dissipation function and / or a heat shielding function, the front surface of the film is not heated by the heat from the PDP even if it is attached to the front surface of the PDP. . This eliminates the need to separately arrange an optical filter with an air cooling gap in front of the film, so that double reflection in the plasma display can be prevented and the plasma display can be made thinner.

Further, if the functional layer is a multilayer thin film layer formed of two or more transparent thin film layers and one or more metal thin film layers sandwiched between them, an electromagnetic wave shielding function, An infrared cut function and an antireflection function can be provided, the layer structure of the film can be simplified, and the cost can be reduced.
Further, if the adhesive layer has a color correction function, the color tone can be corrected without separately providing a color correction layer on the film.

Further, if the adhesive layer has a multilayer structure composed of a plurality of adhesive layers and an adhesive layer substrate sandwiched between these adhesive layers, the shock absorption in the adhesive layer is increased, and the PDP The front surface can be protected from external impacts.
Further, if the substrate is a multilayer substrate composed of two or more layers, the strength of the film is increased, and even if the tempered glass on the front surface of the PDP is broken, the film is not broken, Can be prevented.
Further, if the base material has an ultraviolet cut function, ultraviolet rays leaking from the PDP can be cut without separately providing an ultraviolet cut layer on the film.

  In addition, the plasma display of the present invention is the one in which the front filter for plasma display of the present invention is bonded to the front surface of the plasma display panel, so that there is no double reflection and the thickness is reduced.

Hereinafter, the present invention will be described in detail.
The front filter for a plasma display of the present invention includes a base material, and one or more functional layers having at least one function selected from the group consisting of an electromagnetic wave shielding function, a near infrared ray blocking function, an antireflection function, and a color correction function. A pressure-sensitive adhesive layer formed on one side of the film, and the front filter has a heat dissipation function and / or a heat shielding function.

Examples of a front filter for a plasma display having a heat dissipation function and / or a heat shield function include (1) a film having a base material, one or more functional layers, and a heat dissipation layer, and an adhesive formed on one side of the film. (2) Base material, one or more functional layers, and a film having a heat shielding layer, and a pressure-sensitive adhesive layer formed on one side of the film, (3) Base material, 1 A film having a functional layer equal to or higher than the layer, a heat dissipation layer, and a heat shield layer, and an adhesive layer formed on one side of the film, and the heat dissipation layer is located between the heat shield layer and the adhesive layer (4) a substrate and a film having one or more functional layers, and an adhesive layer formed on one side of the film, and at least one of the substrate, the functional layer, and the adhesive layer is a heat dissipation layer (5) base material, and 1 A film having the above functional layer and an adhesive layer formed on one side of the film, wherein at least one of the base material, the functional layer, and the adhesive layer also serves as a heat shielding layer; (6) Base material And a film having one or more functional layers, and an adhesive layer formed on one side of the film, and at least one of the base material, the functional layer, and the adhesive layer also serves as a heat dissipation layer, and the base material, function And those in which at least one of the layer and the adhesive layer also serves as a heat shielding layer.
Hereinafter, the front filter for plasma displays having the configurations of (4) to (6) will be specifically described.

[Example 1]
FIG. 1 is a cross-sectional view showing an example of a front filter for a plasma display according to the present invention. The front filter 10 for plasma display includes a base material 11, a hard coat layer 12 formed on the surface of the base material 11, an antireflection layer 13 formed on the hard coat layer 12, and an adhesive layer on the back surface of the base material 11. 14 includes an electromagnetic wave shielding layer 15 provided via 14 and an adhesive layer 17 for attaching the film 16 to the PDP. Any one of the layers including the substrate also serves as a heat dissipation layer. In addition, any layer including the substrate also serves as a heat shielding layer.

(Base material)
The substrate 11 is preferably transparent in the visible wavelength region and further has heat resistance. Examples of the material include heat such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexanedimethylene terephthalate (PCT), polyethylene 2,6 naphthalate (PEN), and polybutylene 2,6 naphthalate (PBN). Plastic polyester resin; polycarbonate (PC), polyarylate, polystyrene, polyetheretherketone, polypropylene, polyimide and the like.

  The base material 11 may contain a known additive, for example, an ultraviolet absorber, a plasticizer, a lubricant, a colorant, an antioxidant, a flame retardant, and the like. In particular, in order to give the substrate 11 an ultraviolet cut function, it is preferable to include an ultraviolet absorber such as benzophenone, benzotriazole, or triazine, or a light stabilizer (HALS).

  The base material 11 may be a multilayer base material in which two or more layers of the same type or different types of base materials are laminated by hot pressing, coextrusion or the like. By using such a multilayer substrate, the strength of the film 16 is increased compared to the case where a single layer substrate having the same thickness is used. Even if the tempered glass on the front surface of the PDP is broken, the film 16 is broken. Without scattering, glass fragments can be prevented from scattering. Further, by sandwiching a PC having high impact resistance but inferior heat resistance with a substrate having high heat resistance, the substrate 11 can be provided with heat resistance and impact resistance at the same time. As a structure of a multilayer base material, PET (with an ultraviolet cut function) / PEN, PET (with an ultraviolet cut function) / PC / PET, etc. are mentioned, for example.

  The thickness of the substrate 11 is preferably in the range of 50 to 500 μm. If the thickness of the base material 11 is less than 50 μm, the strength and impact resistance of the film 16 may be insufficient, and the heat conduction of the film 16 tends to increase. On the other hand, when the thickness of the base material 11 exceeds 500 μm, the flexibility is insufficient, so that the film 16 is not suitable for being wound with a roll.

(Hard coat layer)
The hard coat layer 12 is a layer that improves the hardness of the surface of the substrate 11 and prevents scratches caused by scratching.
As the hard coat layer 12, acrylic resins such as ultraviolet curable acrylic esters, acrylamides, methacrylic esters, methacrylamides, organic silicon resins, thermosetting polysiloxane resins, and the like are suitable. It is.

Further, in order to impart an antistatic function to the hard coat layer 12, an antistatic agent such as a metal, a metal oxide, an anionic activator, a cationic activator, an amphoteric activator, and a nonionic activator may be included.
The thickness of the hard coat layer 12 is preferably in the range of 3 to 20 μm from the viewpoint of transparency, coating accuracy, and handleability.

(Antireflection layer)
Examples of the antireflection layer 13 include a multilayer film made of a plurality of films made of materials having different refractive indexes. Such layers include metal oxides, metal fluorides, metal silicides, metal borides, metal carbides, metal nitrides, metal sulfides and other inorganic materials such as vacuum deposition, sputtering, ion plating, ion beam It can be obtained by a method of laminating in multiple layers by the assist method or the like, a method of laminating resins having different refractive indexes such as acrylic resin, fluororesin and the like.

(Electromagnetic wave shielding layer)
The electromagnetic wave shielding layer 15 is a film formed by coating a metal mesh 18 with a transparent resin 19.
Examples of the metal mesh 18 include a mesh obtained by corroding a copper foil, a mesh made of a copper-nickel material in which copper is covered with nickel, and the like.
The transparent resin 19 maintains the light transmittance by matching the refractive index of the mesh gap with the base material 11, the adhesive layer 14, and the adhesive layer 17. Examples of the transparent resin 19 include an acrylic resin and a polycarbonate resin.

Further, the transparent resin 19 contains a near infrared absorber, and the electromagnetic shielding layer 15 is given a function as a near infrared blocking layer.
Near-infrared absorbers include nitroso compounds, their metal complexes, cyanine compounds, squarylium compounds, thiol nickel complex compounds, phthalocyanine compounds, naphthalocyanine compounds, triallylmethane compounds, imonium compounds, diimonium compounds Naphthoquinone compounds, anthraquinone compounds, amino compounds, aminium salt compounds, carbon black, indium tin oxide, antimony tin oxide, oxides of metals belonging to Group 4A, 5A or 6A, carbides, borides, etc. It is done. It is preferable to use two or more kinds of near-infrared absorbers so that the entire near-infrared ray (approximately 800 nm to 1100 nm) can be absorbed, and the amount thereof is, for example, 10% or less of transmittance at a wavelength of 800 nm or more. It is adjusted to become.
The thickness of the electromagnetic wave shielding layer 15 is usually in the range of 5 to 30 μm.

(Adhesive layer)
The adhesive layer 14 adheres the base material 11 and the electromagnetic wave shielding layer 15. Examples of the adhesive used for the adhesive layer 14 include acrylic, urethane, silicone, rubber, vinyl acetate, ethylene-vinyl acetate copolymer, polyvinyl butyral, phenol, epoxy, and petroleum rosin. These adhesives can be mentioned.

(Adhesive layer)
The adhesive layer 17 is for attaching the film 16 to the front surface of the PDP. Therefore, as the material of the pressure-sensitive adhesive layer 17, a pressure-sensitive adhesive or an adhesive that can hold the film 16 on the front surface of the PDP is used.
Examples of the adhesive or adhesive include acrylic, urethane, silicone, rubber, vinyl acetate, ethylene-vinyl acetate copolymer, polyvinyl butyral, phenol, epoxy, petroleum rosin, and adhesive. A gel material etc. are mentioned.

  Among these, as the pressure-sensitive adhesive layer 17, an acrylic pressure-sensitive adhesive or adhesive, a silicon pressure-sensitive adhesive or adhesive, and an epoxy adhesive are preferable in terms of excellent heat resistance. In addition, since the front filter for plasma display may be required to have impact resistance, among these, acrylic adhesives and silicon adhesives are particularly preferable in that they are excellent in both heat resistance and impact resistance. .

  In order to correct the color tone of the PDP image, the adhesive layer 17 may contain a dye that absorbs a wavelength of 595 nm, which is a neon emission spectrum. The amount of the dye is adjusted so that, for example, the transmittance at a wavelength of 595 nm is 20% or less.

  The adhesive layer 17 may have a multilayer structure including a plurality of adhesive layers and an adhesive layer base material sandwiched between the adhesive layers. By adopting such a multilayer structure, the thickness increases, the impact absorbability of the adhesive layer 17 increases, and the front surface of the PDP can be sufficiently protected from external impacts. For example, the thickness of the pressure-sensitive adhesive layer 17 is usually in the range of 20 to 100 μm in the case of a single layer, but can be 30 to 300 μm in the case of a multilayer structure. Examples of the configuration of the pressure-sensitive adhesive layer 17 include pressure-sensitive adhesive layer (with a color tone correction function) / base material for pressure-sensitive adhesive layer / pressure-sensitive adhesive layer.

  Examples of the base material for the adhesive layer include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexanedimethylene terephthalate (PCT), polyethylene 2,6 naphthalate (PEN), polybutylene 2,6 phthalate (PBN) and the like. Thermoplastic polyester resin; polycarbonate (PC), polyarylate, etc. can be used.

(Heat dissipation layer)
The heat dissipation layer is a layer for dissipating heat transferred from the front surface of the PDP. Specifically, the heat dissipation layer quickly transfers heat to the inside of the layer and releases heat from the periphery of the heat dissipation layer. It is a layer that suppresses the temperature rise near the surface of the filter.
The heat dissipation efficiency in the heat dissipation layer depends on the thermal conductivity of the material of the layer and the film thickness of the layer. Therefore, it is preferable to use a resin having a high thermal conductivity and / or to include organic particles or inorganic particles having a high thermal conductivity in the layer serving as the heat dissipation layer. The film thickness is preferably thick because it is excellent in heat dissipation efficiency and impact resistance, but if it is too thick, it is not preferable in terms of transparency and handling.

(Heat shield layer)
The heat shielding layer is a layer that suppresses the temperature rise near the surface of the front filter for plasma display by shielding the heat transmitted from the front surface of the PDP.
The shielding efficiency in the heat shielding layer depends on the thermal conductivity of the material of the layer and the film thickness of the layer. Therefore, it is preferable to use a resin having a low thermal conductivity and / or to include organic particles or inorganic particles having a low thermal conductivity in the layer serving as the heat shielding layer. Further, the layer may be composed of a material that reflects heat, or particles that reflect heat may be included. Further, the near infrared absorbing agent may be added. The film thickness is preferably thick because it is excellent in heat shielding efficiency and impact resistance, but if it is too thick, it is not preferable in terms of transparency and handling.

  By providing either one of the heat dissipation layer and the heat shield layer, it is possible to suppress the temperature rise near the surface of the front filter for plasma display, but this effect can be further improved by combining these two layers. Can be made. Specifically, the heat dissipation layer is preferably provided between the heat shield layer and the adhesive layer, or the adhesive layer is preferably provided with a heat dissipation function. By setting it as such a structure, before heat | fever reaches | attains a thermal insulation layer, it is thermally radiated by the thermal radiation layer, and heat can be more reliably shielded by the thermal insulation layer.

(Front filter for plasma display)
The front filter 10 for plasma display that is directly attached to the front surface of the PDP may be required to have impact resistance for protecting the tempered glass on the front surface of the PDP and to prevent scattering of glass fragments when the tempered glass is broken. Therefore, the front filter 10 for plasma display preferably has a tensile strength of the entire front filter of 100 N / 25 mm width or more and an adhesive strength of 3.0 N / 25 mm width or more.

The tensile strength of the front filter 10 for plasma display is more preferably 200 N / 25 mm width or more, and still more preferably 300 N / 25 mm width or more. Further, the adhesive strength of the front filter 10 for plasma display is more preferably 4.0 N / 25 mm width or more, and still more preferably 5.0 N / 25 mm width or more. The higher the tensile strength and the adhesive strength of the front filter 10 for plasma display, the better, and there is no particular upper limit.
Here, the tensile strength and adhesive strength of the front filter 10 for plasma display are numerical values measured based on JIS A 5759 (standard of anti-scattering film for window glass).

  The front filter 10 for plasma display, for example, sequentially forms a hard coat layer 12 and an antireflection layer 13 on the surface of the base material 11 to form an upper film, and separately, an adhesive layer 17 is provided on the back surface of the electromagnetic wave shielding layer 15. It can be manufactured by forming the lower film and bonding them together via the adhesive layer 14.

(Plasma display)
The plasma display of the present invention is obtained by bonding the front filter 10 for plasma display to the front surface of the PDP and the adhesive layer 17 to the front surface side of the PDP.
In the PDP, for example, a back glass substrate and a front glass substrate on which a large number of linear electrodes are arranged at a predetermined interval are bonded together so that the electrodes are orthogonal to each other, and xenon or neon is formed between the two substrates. It has a structure filled with a mixed gas or the like. In this PDP, a discharge cell is formed at each position where the electrodes on the back side and the front side are orthogonal to each other, and ultraviolet rays generated by the discharge in the discharge cell are provided on the glass substrate on the back side or the front side. When hitting the phosphor, visible light is emitted from the phosphor.

[Example 2]
FIG. 2 is a cross-sectional view showing another example of the front filter for a plasma display according to the present invention. The front filter 20 for plasma display includes a base material 11, a hard coat layer 12 formed on the surface of the base material 11, and a film 22 composed of a multilayer thin film layer 21 formed on the hard coat layer 12, and this It is composed of an adhesive layer 17 for attaching the film 22 to the PDP, and any layer including the base material also serves as a heat dissipation layer, and any layer including the base material also serves as a heat shielding layer. .
About the base material 11, the hard-coat layer 12, the adhesion layer 17, a heat radiating layer, and the heat-shielding layer, since it is the same as that of the form example 1, detailed description thereof is omitted.

(Multilayer thin film layer)
The multilayer thin film layer 21 has a multilayer structure formed of a plurality of transparent thin film layers and a metal thin film layer sandwiched between the transparent thin film layers. The multilayer thin film layer 21 alone has an electromagnetic wave shielding function, a near infrared shielding function, and a reflection function. It has a prevention function.

A transparent thin film layer is a layer which has transparency with respect to visible light, and is a layer which prevents the light ray reflection of the visible region in a metal thin film layer by the refractive index difference with a metal thin film layer.
As a material for forming the transparent thin film layer, a material having a high refractive index, specifically a material having a refractive index with respect to visible light of 1.6 or more, preferably 1.7 or more is used in order to reduce the thickness. Such materials include indium, titanium, zirconium, bismuth, tin, zinc, antimony, tantalum, cerium, neodymium, lanthanum, thorium, magnesium, gallium and other oxides, or mixtures of these oxides, zinc sulfide. Etc. These oxides or sulfides may be in a range that does not greatly change the optical characteristics even if the stoichiometric composition of the metal and oxygen or sulfur is different. However, when using sulfides, it is necessary to consider the influence of sulfur on the silver alloy. An organic compound can also be used if the refractive index is within the above range. In that case, metal fine particles or the like may be added to increase the refractive index.

Among these, indium oxide, a mixture of indium oxide and tin oxide (ITO), and a mixture containing indium oxide and cerium oxide as a main component (ICO) have high transparency and a high refractive index, and are sputtered by DC discharge. (DC sputtering) It is preferable because film formation is possible, the film formation rate is high, and the adhesion with the metal thin film layer is good. Further, by using an oxide semiconductor thin film having relatively high conductivity such as ITO, absorption of electromagnetic waves can be increased.
For forming the transparent thin film layer, conventionally known methods such as sputtering, ion plating, ion beam assist, vacuum deposition, and wet coating can be employed.

  The metal thin film layer is a thin film made of metal, and preferably has a refractive index of light having a wavelength of 550 nm of 0.2 or less and an extinction coefficient of 5.0 or less. If the refractive index of light having a wavelength of 550 nm is 0.2 or less, the transparency is higher, and if the extinction coefficient is 5.0 or less, high transparency can be ensured even in a multilayer structure. In addition, the metal atoms in the metal thin film layer preferably have a continuous structure rather than an island structure from the viewpoint of conductivity or the like.

  Examples of a material having such a refractive index and extinction coefficient include silver or an alloy containing silver. Silver is excellent in electroconductivity (electromagnetic wave shielding property), infrared reflectivity, and visible light transmittance when multilayered. Further, an alloy containing silver can improve the chemical stability and physical stability of silver, and can prevent deterioration and aggregation due to environmental pollutants, water, oxygen, alkali, halogen, sulfur, heat, light, and the like.

Examples of metals other than silver in silver alloys include gold, platinum, palladium, copper, indium, tin, bismuth and other precious metals that are stable to the environment, and metals such as rare earth that move near the silver interface and form a protective layer. preferable. Two or more kinds of these metals may be contained. Among these, substitutional elements that do not destroy the face-centered cubic lattice structure, which is a crystal structure of silver, and elements that move and precipitate at the interface after forming the metal thin film layer to form a protective film for the metal thin film layer are preferable.
The silver content in the silver-containing alloy is preferably 0.3% by mass or more and less than 30% by mass, which is in a range not largely different from the conductivity and optical characteristics of the silver thin film.
For the formation of the metal thin film layer, any conventionally known method such as sputtering, ion plating, vacuum deposition, or plating can be employed.

  The layer structure of the multilayer thin film layer 21 is transparent thin film layer / metal thin film layer / transparent thin film layer / metal thin film layer / transparent thin film layer / from the point that the electromagnetic wave shielding function, the near infrared ray blocking function, and the antireflection function are sufficiently exhibited. 7 layers of metal thin film layer / transparent thin film layer, or transparent thin film layer / metal thin film layer / transparent thin film layer / metal thin film layer / transparent thin film layer / metal thin film layer / transparent thin film layer / metal thin film layer / transparent thin film layer 9 A layer structure is preferred. Further, by optimizing the layer configuration such as the material and the film thickness, it is possible to provide heat dissipation and heat shielding functions.

(Front filter for plasma display)
The front filter 20 for plasma display that is directly attached to the front surface of the PDP may be required to have impact resistance for protecting the tempered glass on the front surface of the PDP and to prevent scattering of glass fragments when the tempered glass is broken. Therefore, the front filter 20 for plasma display preferably has a tensile strength of the entire front filter of 100 N / 25 mm width or more and an adhesive strength of 3.0 N / 25 mm width or more.
The tensile strength of the front filter 20 for plasma display is more preferably 200 N / 25 mm width or more, and still more preferably 300 N / 25 mm width or more. The adhesive strength of the front filter 20 for plasma display is more preferably 4.0 N / 25 mm width or more, and still more preferably 5.0 N / 25 mm width or more. The higher the tensile strength and the adhesive strength of the front filter 20 for plasma display, the better, and there is no particular upper limit.

Here, the tensile strength and adhesive strength of the plasma display front filter 20 can be measured in the same manner as the plasma display front filter 10 of the first embodiment.
The front filter 20 for plasma display can be manufactured, for example, by sequentially forming the hard coat layer 12 and the multilayer thin film layer 21 on the surface of the base material 11 and further forming the adhesive layer 17 on the back surface of the base material 11. .

(Plasma display)
The plasma display of the present invention is obtained by bonding the front filter 20 for plasma display to the front surface of the PDP and the adhesive layer 17 to the front surface side of the PDP.
Examples of the PDP include the same as those in the first embodiment.

[Example 3]
FIG. 3 is a cross-sectional view showing another example of the front filter for a plasma display according to the present invention. The front filter 30 for plasma display includes a base material 11, a second base material 31 bonded to the base material 11 via an adhesive layer 14, a hard coat layer 12 formed on the surface of the base material 11, a hard coat layer. 12, a film 32 composed of an antireflection layer 13 formed on the surface 12 and an electromagnetic wave shielding layer 15 provided on the back surface of the second base material 31 via an adhesive layer 14, and affixing the film 32 to the PDP It is composed of an adhesive layer 17 to be attached, and any layer including the base material also serves as a heat dissipation layer, and any layer including the base material also serves as a heat shielding layer.
Since the base material 11, the hard coat layer 12, the antireflection layer 13, the adhesive layer 14, the electromagnetic wave shielding layer 15, the adhesive layer 17, the heat radiation layer, and the heat shielding layer are the same as those in the first embodiment, these The detailed description of is omitted.

(Second base material)
The second substrate 31 is preferably transparent in the visible wavelength region and further has heat resistance. As the material, the same material as the base material 11 can be used.

  The second base material 31 may contain a known additive such as an ultraviolet absorber, a plasticizer, a lubricant, a colorant, an antioxidant, a flame retardant, and the like. In particular, in order to give the second substrate 31 an ultraviolet cut function, it is preferable to include an ultraviolet absorber such as benzophenone, benzotriazole, or triazine or a light stabilizer (HALS).

  Further, the second base material 31 may be a multilayer base material in which two or more layers of the same type or different types of base materials are laminated by hot pressing, coextrusion or the like. By using such a multilayer substrate, the strength of the film 32 is increased compared to the case where a single layer substrate having the same thickness is used. Even if the tempered glass on the front surface of the PDP is broken, the film 32 is broken. Without scattering, glass fragments can be prevented from scattering. Further, by sandwiching a PC having high impact resistance but inferior heat resistance with a substrate having high heat resistance, the second substrate 31 can be simultaneously provided with heat resistance and impact resistance. As a structure of a multilayer base material, PET (with an ultraviolet cut function) / PEN, PET (with an ultraviolet cut function) / PC / PET, etc. are mentioned, for example.

  The thickness of the second base material 31 is preferably in the range of 50 to 500 μm as the total thickness with the base material 11. If the total thickness of these base materials is less than 50 μm, the strength and impact resistance of the film 32 may be insufficient, and the heat conduction of the film 32 tends to increase. On the other hand, when the total thickness of these base materials exceeds 500 μm, the flexibility is insufficient, so that the film 32 is not suitable for being wound with a roll.

(Front filter for plasma display)
The front filter 30 for plasma display that is directly attached to the front surface of the PDP may be required to have impact resistance for protecting the tempered glass on the front surface of the PDP and to prevent scattering of glass fragments when the tempered glass is broken. Therefore, the front filter 30 for plasma display preferably has a tensile strength of the entire front filter of 100 N / 25 mm width or more and an adhesive strength of 3.0 N / 25 mm width or more.
The tensile strength of the front filter 30 for plasma display is more preferably 200 N / 25 mm width or more, and still more preferably 300 N / 25 mm width or more. Further, the adhesive strength of the front filter 30 for plasma display is more preferably 4.0 N / 25 mm width or more, and still more preferably 5.0 N / 25 mm width or more. The higher the tensile strength and the adhesive strength of the front filter 30 for plasma display, the better, and there is no particular upper limit.

Here, the tensile strength and adhesive strength of the plasma display front filter 30 can be measured in the same manner as the plasma display front filter 10 of the first embodiment.
The front filter 30 for plasma display, for example, forms an upper film by sequentially forming the hard coat layer 12 and the antireflection layer 13 on the surface of the base material 11, and separates the electromagnetic wave shield on the back surface of the second base material 31. It can be manufactured by attaching the layer 15 via the adhesive 14, forming the adhesive layer 17 on the back surface of the electromagnetic wave shielding layer 15 to form a lower film, and attaching them together via the adhesive layer 14.

(Plasma display)
In the plasma display of the present invention, the front filter 30 for plasma display is bonded to the front surface of the PDP and the adhesive layer 17 is bonded to the front surface side of the PDP.
Examples of the PDP include the same as those in the first embodiment.

[Example 4]
FIG. 4 is a sectional view showing another example of the front filter for a plasma display according to the present invention. The front filter 40 for plasma display is formed on the base 11, the hard coat layer 12 formed on the surface of the base 11, the antireflection layer 13 formed on the hard coat layer 12, and the back of the base 11. The infrared shielding layer 41, the second substrate 31 attached to the infrared shielding layer 41 via the adhesive 14, and the electromagnetic shielding layer 42 provided on the back surface of the second substrate 31 via the adhesive layer 14 And a pressure-sensitive adhesive layer 17 for affixing the film 43 to the PDP. Any one of the layers including the base serves as a heat dissipation layer, and any of the layers including the base includes It also serves as a heat shield layer.
The base material 11, the hard coat layer 12, the antireflection layer 13, the adhesive layer 14, the adhesive layer 17, the heat dissipation layer, and the heat shielding layer are the same as those in the first embodiment, and the second base material 31. Since this is the same as that in the third embodiment, detailed description thereof will be omitted.

(Infrared blocking layer)
The infrared blocking layer 41 is formed, for example, by coating a transparent resin containing a near infrared absorber on the substrate 11.
Examples of the transparent resin include an acrylic resin and a polycarbonate resin.
As a near-infrared absorber, the same thing as what was used with the transparent resin 19 of the electromagnetic wave shield layer 15 of the form example 1 can be used.
The thickness of the infrared shielding layer 41 is usually in the range of 5 to 30 μm.

(Electromagnetic wave shielding layer)
The electromagnetic wave shielding layer 42 is formed by coating the metal mesh 18 with a transparent resin 44 to form a film.
The transparent resin 44 is obtained by removing the near-infrared absorber from the transparent resin 19 of the first embodiment. The base resin is the same as the transparent resin 19.

(Front filter for plasma display)
The front filter 40 for plasma display that is directly attached to the front surface of the PDP may be required to have impact resistance for protecting the tempered glass on the front surface of the PDP and to prevent scattering of glass fragments when the tempered glass is broken. Therefore, the front filter 40 for plasma display preferably has a tensile strength of the entire front filter of 100 N / 25 mm width or more and an adhesive strength of 3.0 N / 25 mm width or more.
The tensile strength of the front filter 40 for plasma display is more preferably 200 N / 25 mm width or more, and still more preferably 300 N / 25 mm width or more. Further, the adhesive strength of the front filter 40 for plasma display is more preferably 4.0 N / 25 mm width or more, and still more preferably 5.0 N / 25 mm width or more. The higher the tensile strength and the adhesive strength of the front filter 40 for plasma display, the better, and there is no particular upper limit.

Here, the tensile strength and adhesive strength of the plasma display front filter 40 can be measured in the same manner as the plasma display front filter 10 of the first embodiment.
The front filter 40 for plasma display is formed, for example, by sequentially forming the hard coat layer 12 and the antireflection layer 13 on the surface of the base material 11 and forming the infrared shielding layer 41 on the back surface of the base material 11 to form an upper film. Separately, the electromagnetic wave shielding layer 42 is attached to the back surface of the second base material 31 via the adhesive 14, and the adhesive layer 17 is formed on the back surface of the electromagnetic wave shielding layer 42 to form a lower film, and these are bonded. It can be manufactured by bonding through the layer 14.

(Plasma display)
The plasma display of the present invention is obtained by bonding the front filter 40 for plasma display to the front surface of the PDP and the adhesive layer 17 to the front surface side of the PDP.
Examples of the PDP include the same as those in the first embodiment.

[Example 5]
FIG. 5 is a cross-sectional view showing another example of the front filter for a plasma display according to the present invention. The front filter 50 for plasma display includes a base material 11, a hard coat layer 12 formed on the surface of the base material 11, a multilayer thin film layer 21 formed on the hard coat layer 12, and an adhesive layer on the back surface of the base material 11. 14 and the adhesive layer 17 for attaching the film 51 to the PDP, and any one of the layers including the substrate also serves as a heat dissipation layer. In addition, any layer including the substrate also serves as a heat shielding layer.
About the base material 11, the hard-coat layer 12, the adhesion layer 17, a thermal radiation layer, and a heat-shielding layer, it is the same as the thing of the form example 1, About the multilayer thin film layer 21, it is the same as the thing of the form example 2. The electromagnetic wave shielding layer 42 is the same as that of the fourth embodiment, and detailed description thereof will be omitted.

(Front filter for plasma display)
The front filter 50 for a plasma display that is directly attached to the front surface of the PDP may be required to have impact resistance for protecting the tempered glass on the front surface of the PDP and to prevent scattering of glass fragments when the tempered glass is broken. Therefore, the front filter 50 for plasma display preferably has a tensile strength of the entire front filter of 100 N / 25 mm width or more and an adhesive strength of 3.0 N / 25 mm width or more.
The tensile strength of the front filter 50 for plasma display is more preferably 200 N / 25 mm width or more, and still more preferably 300 N / 25 mm width or more. The adhesive strength of the front filter 50 for plasma display is more preferably 4.0 N / 25 mm width or more, and still more preferably 5.0 N / 25 mm width or more. The higher the tensile strength and the adhesive strength of the front filter 50 for plasma display, the better, and there is no particular upper limit.

Here, the tensile strength and adhesive strength of the plasma display front filter 50 can be measured in the same manner as the plasma display front filter 10 of the first embodiment.
The front filter 50 for plasma display, for example, sequentially forms the hard coat layer 12 and the multilayer thin film layer 21 on the surface of the base material 11 to form an upper film, and separately, the adhesive layer 17 is formed on the back surface of the electromagnetic wave shielding layer 42. It can be manufactured by forming the lower film and bonding them together via the adhesive layer 14.

(Plasma display)
In the plasma display of the present invention, the front filter 50 for plasma display is bonded to the front surface of the PDP and the adhesive layer 17 is bonded to the front surface side of the PDP.
Examples of the PDP include the same as those in the first embodiment.

[Example 6]
FIG. 6 is a cross-sectional view showing another example of the front filter for a plasma display according to the present invention. The front filter 60 for plasma display includes a base material 11, a second base material 31 bonded to the base material 11 via an adhesive layer 14, a hard coat layer 12 formed on the surface of the base material 11, and a hard coat layer. 12, a film 61 composed of a multilayer thin film layer 21 formed on 12 and an electromagnetic wave shielding layer 42 provided on the back surface of the second base material 31 via an adhesive layer 14, and this film 61 is attached to a PDP It is composed of an adhesive layer 17 to be attached, and any layer including the base material also serves as a heat dissipation layer, and any layer including the base material also serves as a heat shielding layer.
About the base material 11, the hard-coat layer 12, the adhesion layer 17, a thermal radiation layer, and a heat-shielding layer, it is the same as the thing of the form example 1, About the multilayer thin film layer 21, it is the same as the thing of the form example 2. In addition, the second base material 31 is the same as that in the third embodiment, and the electromagnetic wave shielding layer 42 is the same as that in the fourth embodiment, so that detailed description thereof is omitted.

(Front filter for plasma display)
The front filter 60 for plasma display that is directly attached to the front surface of the PDP may be required to have impact resistance for protecting the tempered glass on the front surface of the PDP and to prevent scattering of glass fragments when the tempered glass is broken. Therefore, the front filter 60 for plasma display preferably has a tensile strength of the entire front filter of 100 N / 25 mm width or more and an adhesive strength of 3.0 N / 25 mm width or more.
The tensile strength of the front filter 60 for plasma display is more preferably 200 N / 25 mm width or more, and still more preferably 300 N / 25 mm width or more. The adhesive strength of the front filter 60 for plasma display is more preferably 4.0 N / 25 mm width or more, and still more preferably 5.0 N / 25 mm width or more. The higher the tensile strength and the adhesive strength of the front filter 60 for plasma display, the better, and there is no particular upper limit.

Here, the tensile strength and adhesive strength of the plasma display front filter 60 can be measured in the same manner as the plasma display front filter 10 of the first embodiment.
For example, the front filter 60 for plasma display is formed by sequentially forming the hard coat layer 12 and the multilayer thin film layer 21 on the surface of the base material 11 to form an upper film, and separately from the electromagnetic wave shield on the back surface of the second base material 31. It can be manufactured by attaching the layer 42 via the adhesive 14, forming the adhesive layer 17 on the back surface of the electromagnetic wave shielding layer 42 to form a lower film, and attaching them together via the adhesive layer 14.

(Plasma display)
The plasma display of the present invention is obtained by bonding the front filter 60 for plasma display to the front surface of the PDP and the adhesive layer 17 to the front surface side of the PDP.
Examples of the PDP include the same as those in the first embodiment.

[Other examples]
The front filter for plasma display of the present invention is not limited to the above-described embodiments 1 to 6, and has a film having a base material and a functional layer, and an adhesive layer formed on one side of the film. As long as the front filter has a heat dissipation function and / or a heat shielding function, it may have any form.

  For example, the base material may be provided with a near-infrared absorbing agent or a dye that absorbs a wavelength of 595 nm to give a near-infrared blocking function or a color tone correcting function, and the near-infrared blocking layer has a wavelength of 595 nm. It is also possible to provide a color tone correction function by including a dye that absorbs. Further, an antifouling layer may be provided. The antifouling layer is a layer having water repellency, oil repellency, and low friction, for example, silicon oxide, fluorine-containing silicon compound, fluoroalkylsilazane, fluoroalkylsilane, fluorine-containing silane compound, perfluoropolyether group-containing It is formed by coating the film surface with a silane coupling agent or the like.

  In addition, the heat dissipation layer and the heat shielding layer do not necessarily have to serve as the base material, the functional layer, or the adhesive layer as in the first to sixth embodiments. The heat dissipation layer and / or the heat shield layer may be provided independently.

  By attaching the front filter for plasma display of the present invention to the front surface of the PDP, there is no need to separately arrange an optical filter in front of the PDP with a space for air cooling. A thin plasma display can be provided.

It is sectional drawing which shows an example of the front filter for plasma displays of this invention. It is sectional drawing which shows the other example of the front filter for plasma displays of this invention. It is sectional drawing which shows the other example of the front filter for plasma displays of this invention. It is sectional drawing which shows the other example of the front filter for plasma displays of this invention. It is sectional drawing which shows the other example of the front filter for plasma displays of this invention. It is sectional drawing which shows the other example of the front filter for plasma displays of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Front filter for plasma display 11 Base material 16 Film 17 Adhesive layer 20 Front filter for plasma display 21 Multilayer thin film layer 22 Film 30 Front filter for plasma display 31 2nd base material 32 Film 40 Front filter for plasma display 43 Film 50 Plasma Front filter for display 51 film 60 Front filter for plasma display 61 film

Claims (13)

A film having a base material, one or more functional layers having at least one function selected from the group consisting of an electromagnetic wave shielding function, a near-infrared shielding function, an antireflection function, and a color correction function;
A front filter for a plasma display, comprising an adhesive layer formed on one side of the film. A film having a base material, one or more functional layers having at least one function selected from the group consisting of an electromagnetic wave shielding function, a near-infrared shielding function, an antireflection function, and a color correction function; and a heat shielding layer;
A front filter for a plasma display, comprising an adhesive layer formed on one side of the film. A base material, one or more functional layers having at least one function selected from the group consisting of an electromagnetic wave shielding function, a near-infrared shielding function, an antireflection function, and a color correction function, a heat dissipation layer, and a heat shielding layer Having a film;
Having an adhesive layer formed on one side of this film,
The front filter for a plasma display, wherein the heat dissipation layer is located between the heat shielding layer and the adhesive layer. A film having a base material and one or more functional layers having at least one function selected from the group consisting of an electromagnetic wave shielding function, a near-infrared shielding function, an antireflection function, and a color correction function;
A front filter for a plasma display having an adhesive layer formed on one side of the film,
A front filter for a plasma display, wherein the front filter has a heat dissipation function. A film having a base material and one or more functional layers having at least one function selected from the group consisting of an electromagnetic wave shielding function, a near-infrared shielding function, an antireflection function, and a color correction function;
A front filter for a plasma display having an adhesive layer formed on one side of the film,
A front filter for a plasma display, wherein the front filter has a heat shielding function. A film having a base material and one or more functional layers having at least one function selected from the group consisting of an electromagnetic wave shielding function, a near-infrared shielding function, an antireflection function, and a color correction function;
A front filter for a plasma display having an adhesive layer formed on one side of the film,
The front filter for a plasma display, wherein the adhesive layer has a heat dissipation function. A film having a base material and one or more functional layers having at least one function selected from the group consisting of an electromagnetic wave shielding function, a near-infrared shielding function, an antireflection function, and a color correction function;
A front filter for a plasma display having an adhesive layer formed on one side of the film,
The front filter for a plasma display, wherein the adhesive layer has a heat shielding function.   The said functional layer is a multilayer thin film layer formed from the some transparent thin film layer and the metal thin film layer pinched | interposed into these transparent thin film layers, The Claim 1 thru | or 7 characterized by the above-mentioned. Front filter for plasma display.   The front filter for a plasma display according to claim 1, wherein the adhesive layer has a color correction function.   The plasma according to any one of claims 1 to 9, wherein the pressure-sensitive adhesive layer has a multilayer structure including a plurality of pressure-sensitive adhesive layers and a pressure-sensitive adhesive layer base material sandwiched between the pressure-sensitive adhesive layers. Front filter for display.   The front filter for a plasma display according to any one of claims 1 to 10, wherein the substrate is a multilayer substrate composed of two or more layers.   The front filter for a plasma display according to any one of claims 1 to 11, wherein the substrate has an ultraviolet cut function. A plasma display panel;
A plasma display comprising the front filter for plasma display according to any one of claims 1 to 12, which is bonded to the front surface of the plasma display panel.

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