JP2013134338A - Plasma display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display device which is superior in design by having texture of a transparent substrate like a glass substrate, in a front surface part and having at least a part of a peripheral edge of the transparent substrate exposed to the front surface and is easily made thin and is superior in productivity.SOLUTION: A plasma display device 1 includes: a display panel 2; and an optical filter 3 which is disposed in the front of the display panel and includes a transparent substrate 31 having a thickness of 0.5 to 2.0 mm and one or more functional films 32 laminated on the transparent substrate. The optical filter 3 has a frame-like concealing layer 34 in a peripheral edge 3a thereof, and at least one side of the peripheral edge 3a is exposed to the front surface.

Description

  The present invention relates to a plasma display device in which an optical filter having a transparent substrate is provided on the front surface of a display panel.

  A plasma display device discharges from a gas between electrodes by a direct current or an alternating voltage applied to the electrodes, and excites phosphors by ultraviolet rays generated in association with this, and emits light. It has excellent display characteristics such as display capacity, brightness, contrast, afterimage and viewing angle.

  However, the plasma display device often emits electromagnetic waves and near-infrared rays on the principle of light emission. Electromagnetic waves and near infrared rays may affect the human body and may cause malfunction of precision equipment such as a wireless telephone and a remote controller. For this reason, functional films such as an electromagnetic wave shielding film for shielding electromagnetic waves and a near infrared shielding film for shielding near infrared rays are disposed on the front surface portion of the plasma display device.

  A functional film is arrange | positioned in the front surface of a display panel in the state laminated | stacked, for example on transparent substrates, such as a glass substrate (for example, refer patent document 1). When a transparent substrate is used, a texture such as a glass substrate that is a transparent substrate can be imparted to the front surface of the plasma display device. However, since the mass of the transparent substrate is large, the entire circumference of the peripheral portion is generally thick inside the housing. A fixing method of fixing by sandwiching in the vertical direction is adopted.

  When such a fixing method is employed, the optical filter can be reliably fixed, but the peripheral edge portion, particularly the front surface portion, is covered with the casing, and the design is not necessarily excellent. Further, since it is necessary to dispose a member for sandwiching the optical filter between the display panel and the optical filter, the gap cannot be reduced, and it is difficult to reduce the thickness of the plasma display device.

On the other hand, according to the method of laminating the functional film directly on the front part of the display panel without using the transparent substrate, it is easy to make the plasma display device thinner, but the glass that is the transparent substrate on the front part. The texture of the substrate cannot be added.

JP 2005-331815 A

  In recent years, from the viewpoint of design, it is required to impart a texture of a transparent substrate such as a glass substrate to the front surface portion of a plasma display device. In addition, from the viewpoint of design, there is a demand for a flat surface with no irregularities or steps on the front surface, eliminating the peripheral edge of the transparent substrate, particularly the front surface and the side surface, etc. It is required to expose this part as it is. Furthermore, there is a demand for a product that satisfies these requirements and can be easily reduced in thickness and has excellent productivity.

  The present invention has been made in order to solve the above-described problems, and a front substrate is provided with a texture of a transparent substrate such as a glass substrate, and at least a part of a peripheral portion of the transparent substrate is exposed to the front. An object of the present invention is to provide a plasma display device that is excellent in design, easy to be thinned, and excellent in productivity.

  The plasma display device of the present invention is an optical device having a display panel, a transparent substrate having a thickness of 0.5 to 2.0 mm disposed on the front surface of the display panel, and one or more functional films laminated on the transparent substrate. And a filter. Further, the optical filter has a frame-like concealing layer at the peripheral edge, and at least one side of the peripheral edge is exposed to the front surface.

  According to the present invention, an optical filter in which one or more functional films are laminated on a transparent substrate is provided on the front surface of the display panel, the thickness of the transparent substrate in the optical filter is 0.5 to 2.0 mm, By providing a frame-shaped concealing layer and exposing at least one side of the peripheral portion to the front surface, it is possible to provide a plasma display device that is excellent in design, easy to be thinned, and excellent in productivity.

Sectional drawing which shows the 1st fixing method of an optical filter. Sectional drawing which shows the 1st modification in a 1st fixing method. Sectional drawing which shows the 2nd modification in a 1st fixing method. Sectional drawing which shows the 3rd modification in a 1st fixing method. Sectional drawing which shows the 4th modification in a 1st fixing method. Sectional drawing which shows the 5th modification in a 1st fixing method. Sectional drawing which shows the 2nd fixing method of an optical filter. Sectional drawing which shows the 1st modification in a 2nd fixing method. Sectional drawing which shows the 2nd modification in a 2nd fixing method. Sectional drawing which shows the 3rd modification in a 2nd fixing method. The top view which shows the example of the front part of a plasma display apparatus. Sectional drawing and top view which show the specific example of a 1st fixing method.

Hereinafter, the plasma display apparatus of the present invention will be described.
1 to 10 are partial cross-sectional views of the plasma display device, and in particular, are cross-sectional views showing a method for fixing an optical filter and its modification. 1 to 6 relate to the first fixing method, and FIGS. 7 to 10 relate to the second fixing method.

  As shown in FIGS. 1 to 10, the plasma display device 1 includes a display panel 2 that is a main display unit, and an optical filter 3 disposed on the front surface of the display panel 2. In the optical filter 3, one or more functional films 33 are laminated on a transparent substrate 31 having a thickness of 0.5 to 2.0 mm via an adhesive layer 32, and a frame-shaped concealing layer 34 is formed on the peripheral edge 3a. Is provided. A housing 4 is provided so as to accommodate at least the display panel 2.

  In the optical filter 3, at least one side of the peripheral edge portion 3a is exposed to the front surface. FIG. 11 is a plan view showing an example of the front surface portion of the plasma display device 1. As for the peripheral part 3a, all four sides may be exposed as shown to Fig.11 (a), only the upper side may be exposed as shown in FIG.11 (b), FIG.11 (c) ), The upper and lower sides may be exposed, or the upper side and the left and right sides may be exposed as shown in FIG. Reference numeral 3 b denotes an outer end portion of the optical filter 3, 4 a denotes an outer end portion on the front surface portion of the housing 4, and 4 b denotes an inner end portion on the front surface portion of the housing 4.

  According to such a plasma display device 1, the texture of the transparent substrate 31 can be imparted to the front surface portion by arranging the optical filter 3 having the transparent substrate 31 on the front surface of the display panel 2. Further, by using a transparent substrate 31 having a thickness of 0.5 to 2.0 mm, the optical filter 3 can be reduced in weight, a predetermined fixing method can be adopted, and the steps necessary for fixing can be reduced. As a result, at least one side of the peripheral edge portion 3a is exposed to the front surface to improve the design, and it is easy to make it thin and excellent in productivity.

  Specifically, such a plasma display device 1 fixes at least one of the four sides of the peripheral edge portion 3a by the first fixing method as shown in FIGS. It is obtained by fixing by the second fixing method as shown in 7-10.

  As shown in FIGS. 1-6, the 1st fixing method is a method of fixing the peripheral part 3a with a back surface part using the fixing jig 5. FIG. As shown in FIGS. 7 to 10, the second fixing method is a method in which the peripheral edge portion 3 a is sandwiched and fixed in the thickness direction by the protruding portions 41 and 42 protruding inside the housing 4.

  According to the 1st fixing method as shown in FIGS. 1-6, since the peripheral part 3a is fixed by a back surface part, the peripheral part 3a is covered like the 2nd fixing method as shown in FIGS. There is no need to provide such a casing 4. For this reason, as shown in FIGS. 1-3, the front part of the optical filter 3 and the front part of the housing | casing 4 can be made into the substantially the same position, or as shown in FIGS. 3 and the peripheral edge 3a can be exposed to the front surface to improve the design. Further, when all the four sides of the peripheral edge portion 3a are fixed by the first fixing method, the protruding portions 41 and 42, particularly the display panel 2 and the optical filter 3 as in the second fixing method as shown in FIGS. Therefore, it is not necessary to provide the projecting portion 42 disposed between the display panel 2 and the optical filter 3, so that the space between the display panel 2 and the optical filter 3 can be reduced.

  In the case of the first fixing method, the fixing force of the optical filter 3 is not necessarily higher than that of the second fixing method. However, by setting the thickness of the transparent substrate 31 to 0.5 to 2.0 mm, The filter 3 can be reduced in weight and can be securely fixed.

FIG. 12 is a cross-sectional view and a plan view showing a specific example of the first fixing method.
As shown in FIG. 12A, the fixing jig 5 used in the first fixing method includes, for example, a pair of plane portions 51 used for adhesion to the optical filter 3, and the pair of plane portions 51. And a fixing portion 52 which is provided at a position higher than these and used for fixing to the housing 4. The fixing portion 52 is provided with a hole portion 53 that is used, for example, for screwing to the housing 4.

  Such a fixing jig 5 adheres the optical filter 3 to the housing by bonding the flat portion 51 to the back surface of the optical filter 3 via the adhesive layer 6 and screwing the fixing portion 52 to the housing 4. 4 can be fixed. The number of holes 53 provided in the fixing jig 5 is not necessarily limited. However, since the number of steps for fixing the fixing jig 5 increases and productivity tends to decrease as the number increases, two or less is preferable. One is more preferable.

  As shown in FIG. 12B, the fixing jig 5 is provided so that the outer end 3b of the peripheral edge 3a and the longitudinal direction of the fixing jig 5 are parallel to each other and the whole overlaps the concealing layer 34. The number of fixing jigs 5 provided on one side is not necessarily limited as long as it is one or more, but two or more are preferable from the viewpoint of fixing evenly and reliably. In addition, since productivity will fall when the number of the fixing jigs 5 increases, the number of the fixing jigs 5 provided on one side is preferably 5 or less.

  A known adhesive or adhesive tape can be used for the adhesive layer 6. When an adhesive is used, generally a shear strength of 15 MPa or more can be obtained. When an adhesive tape is used, a shear strength of 0.1 MPa or more can be obtained. Examples of the adhesive include thermosetting resins and pressure-sensitive adhesives.

  As thermosetting resins, unsaturated polyester resins, polyurethane resins, epoxy resins, epoxy-melamine resins, phenol resins, phenol-formalin resins, urea resins, urea-formalin resins, melamine resins, polyester-melamine resins, melamine-formalins Examples thereof include resins, alkyd resins, polyimide resins, acrylic resins, polysiloxane resins, and the like. A curing agent such as a crosslinking agent or a polymerization initiator, or a polymerization accelerator can be added to the resin as necessary. For example, as a curing agent, isocyanate, organic sulfonate, etc. are added to unsaturated polyester resin, polyurethane resin, etc., organic amine, etc. are added to epoxy resin, peroxide such as methyl ethyl ketone peroxide, azoisobutyl nitrile, etc. A radical initiator is added to the unsaturated polyester resin.

  Examples of the pressure-sensitive adhesive include acrylic pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, butadiene-based pressure-sensitive adhesives, and urethane-based pressure-sensitive adhesives, and acrylic pressure-sensitive adhesives are particularly preferable. The acrylic pressure-sensitive adhesive is made of a polymer containing an acrylic monomer unit as a main component. Examples of the acrylic monomer include (meth) acrylic acid, itaconic acid, (anhydrous) maleic acid, (anhydrous) fumaric acid, crotonic acid, and alkyl esters thereof. Here, “(meth) acrylic acid” is used as a general term for acrylic acid and methacrylic acid.

  The ratio of the area of the adhesive layer 6 to the area of the optical filter 3, particularly the area of the back surface portion is preferably 5% or less. The area of the adhesive layer 6 is the total area of the adhesive layers 6 when a plurality of adhesive layers 6 are provided. If the area ratio of the adhesive layer 6 is 5%, the optical filter 3 can be reliably fixed even when the optical filter 3 is fixed using only the fixing jig 5. The area ratio of the adhesive layer 6 is preferably 3% or less, and more preferably 1% or less, from the viewpoint of raw material cost and productivity. When only the fixing jig 5 is used and the optical filter 3 is fixed using only the adhesive as the adhesive layer 6, the area of the adhesive layer 6 is preferably 0.0001% or more, and 0.001% The above is more preferable. In this case, the area of the adhesive layer 6 is preferably 0.5% or less from the viewpoint of reducing the amount of adhesive used and simplifying the installation process of the fixing jig 5. On the other hand, when only the fixing jig 5 is used and the optical filter 3 is fixed using only the adhesive tape as the adhesive layer 6, the area of the adhesive layer 6 is preferably 0.1% or more, 0.5% The above is more preferable.

  The transparent substrate 31 in the optical filter 3 is made of a translucent material and has a thickness of 0.5 to 2.0 mm. By setting the thickness of the transparent substrate 31 to 0.5 to 2.0 mm, the optical filter 3 can be reduced in weight and can be fixed easily. The transparent substrate 31 is preferably a tempered glass plate, for example, an air-cooled tempered glass plate, a chemically tempered glass plate, or the like because sufficient strength can be obtained even when the thickness is as thin as 0.5 to 2.0 mm. .

  Examples of the functional film 33 include an electromagnetic wave shielding film, a contrast improving film, an antireflection film, an antiglare film (antiglare film), a color tone correction film, and a near infrared shielding film. Further, the functional film 33 may be a transparent film that is used only for forming the concealing layer 34 and has only a function of supporting the concealing layer 34. At least one of these functional films 33 may be laminated on the transparent substrate 31.

  As a transparent film, if it consists of a translucent material, it will not specifically limit. Examples of the translucent material include polyester resins such as polyethylene terephthalate and polybutylene terephthalate, cellulose resins such as triacetyl cellulose, acrylic resins, and polycarbonate resins. Among these, polyethylene terephthalate and triacetyl cellulose are preferable from the viewpoints of transparency and processability.

  The thickness of the transparent film is usually 10 to 5000 μm, preferably 25 to 1000 μm, and more preferably 35 to 500 μm. By setting the thickness to 10 μm or more, the handleability is improved, and the strength can be secured to prevent damage such as tearing. On the other hand, by setting the thickness to 5000 μm or less, a decrease in handleability due to an excessive thickness can be suppressed, and the visible light transmittance can be increased.

  The electromagnetic wave shielding film has, for example, the above-described transparent film and an electromagnetic wave shielding layer formed on the transparent film. Examples of the electromagnetic wave shielding layer include a metal mesh layer. The metal mesh layer is usually formed by bonding a copper foil on a transparent film and then processing the copper foil into a mesh or printing a conductive ink such as copper or silver on the transparent film in a mesh. Is formed. Moreover, as an electromagnetic wave shielding layer, what laminated | stacked the metal oxide layer and the metal layer alternately on the transparent film by the sputtering method etc. is mentioned, for example. The metal oxide layer is made of, for example, an oxide of indium and tin, an oxide of titanium and zinc, an oxide of aluminum and zinc, or an oxide of niobium, and the metal layer is made of, for example, silver or silver Made of alloy.

  The contrast enhancement film suppresses a decrease in contrast due to external light. For example, the above-described transparent film and a plurality of films that are formed on the transparent film, extend in the horizontal direction, and are arranged in parallel to each other. It has a translucent area | region and the dark color part formed between these translucent areas. The dark portion contains dark particles, and the cross-sectional shape thereof is a wedge shape, a substantially trapezoidal shape, a square shape, a rectangular shape, or the like.

  The antireflection film suppresses reflection of visible light, suppresses reflection, and suppresses a decrease in contrast of a display image. For example, the antireflection film is formed on the transparent film and the transparent film as described above. And an antireflection layer. Examples of the antireflection layer include an alternately laminated film in which an inorganic compound having a low refractive index and an inorganic compound having a high refractive index are alternately laminated, a film made of an inorganic compound having a low refractive index, and a film made of a resin having a low refractive index. It is done. Examples of the inorganic compound having a low refractive index include silicon dioxide. Examples of the resin having a low refractive index include a fluororesin, a silicone resin, and a fluorosilicone resin.

  The antiglare film (antiglare film) is composed of, for example, the above-described transparent film and an antiglare layer having an uneven structure formed on the transparent film. The antiglare layer has an effect of diffusing a reflected image reflected on the surface by the uneven structure provided on the surface and blurring the outline, and also has an effect of suppressing generation of Newton rings when viewed from the front direction.

  The color tone correction film is provided to absorb a part of a specific wavelength range of visible light and improve the color tone of transmitted visible light, and includes a color tone correction dye. Examples of color correction dyes include azo, condensed azo, diimonium, phthalocyanine, anthraquinone, indigo, perinone, perylene, dioxazine, quinacridone, methine, isoindolinone, and quinophthalone. , Pyrrole-based, thioindigo-based, metal complex-based, porphyrin-based, tetraazaporphyrin-based organic pigments, organic dyes, and inorganic pigments.

  Among the color tone correction dyes, it is preferable to use a dye having good weather resistance, for example, one or more selected from anthraquinone dyes, quinophthalone dyes, and tetraazaporphyrin dyes. Further, it is more preferable to use one or more selected from anthraquinone dyes and tetraazaporphyrin dyes in combination.

"Anthraquinone dye"
Preferred examples of the anthraquinone dye include compounds represented by the following general formulas (1) and (2).

In the formula, R ^{1 to} R ⁸ are each independently a hydrogen atom, a chlorine atom, a fluorine atom, a bromine atom, a cyano group, a benzyl group, a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, or one or more hydrogen atoms being a fluorine atom. An alkyl group having 1 to 12 carbon atoms substituted with a bromine atom or a chlorine atom, a phenyl group, a phenyl group in which one or more hydrogen atoms are substituted with a fluorine atom, a bromine atom or a chlorine atom, 1 to 12 carbon atoms An alkoxyl group having 1 to 12 carbon atoms in which one or more hydrogen atoms are substituted with a fluorine atom, a bromine atom or a chlorine atom, —CO—R ^h (where R ^h is an alkyl having 1 to 8 carbon atoms) group, a phenyl group, a benzyl group, a cyclohexyl group, cyclohexylmethyl group, or a 1-naphthyl group or a 2-naphthyl ^{group), -. S-R i} ( however, ^{R i} is carbon 1-8 alkyl group, phenyl group, benzyl group, cyclohexyl group, cyclohexylmethyl group, 1-naphthyl group or 2-naphthyl group) or -NH-Ph (where Ph is a phenyl group or Or a phenyl group in which one or more hydrogen atoms are substituted with any of an alkyl group having 1 to 10 carbon atoms and an alkoxyl group having 1 to 10 carbon atoms.

Among the compounds represented by the formula (1), R ⁸ is —NH—Ph (where Ph is a phenyl group or an alkyl group having 1 to 10 carbon atoms and an alkyl group having 1 to 10 carbon atoms and 1 to 10 carbon atoms). It is preferably a phenyl group substituted with any alkoxyl group. R ¹ , R ⁴ , R ⁵ , and R ⁶ are a phenyl group in which one of the four groups is a hydroxyl group, a phenyl group, and one or more hydrogen atoms are substituted with a fluorine atom, a bromine atom, or a chlorine atom. It is preferable that the remaining three groups are hydrogen atoms. R ² , R ³ and R ⁷ are preferably hydrogen atoms. It is preferable that the substituent is a compound as described above since the solubility in a solvent is excellent.

In the formula, R ^{9 to} R ²² are each independently a hydrogen atom, a chlorine atom, a fluorine atom, a bromine atom, a cyano group, a benzyl group, an alkyl group having 1 to 12 carbon atoms, one or more hydrogen atoms are a fluorine atom, bromine An alkyl group having 1 to 12 carbon atoms substituted by an atom or a chlorine atom, a phenyl group, a phenyl group having one or more hydrogen atoms substituted by a fluorine atom, a bromine atom or a chlorine atom, an alkoxyl having 1 to 12 carbon atoms group, one or more hydrogen atoms fluorine atom, an alkoxyl group substituted with a bromine atom or a chlorine atom, -CO-R j ^(provided that, R ^j represents an alkyl group having 1 to 8 carbon atoms, a phenyl group, a benzyl group, cyclohexyl, cyclohexylmethyl group, or a 1-naphthyl group or a 2-naphthyl ^{group), -. S-R k} ( however, ^{R k} is an alkyl group having 1 to 8 carbon atoms, An phenyl group, a benzyl group, a cyclohexyl group, a cyclohexylmethyl group, a 1-naphthyl group or a 2-naphthyl group) or -NH-Ph (where Ph is a phenyl group or one or more hydrogen atoms) A phenyl group substituted with any one of an alkyl group having 1 to 10 carbon atoms and an alkoxyl group having 1 to 10 carbon atoms.

  As the anthraquinone dye, the compound represented by the formula (1) is preferable from the viewpoint of solubility in a solvent. Examples of the anthraquinone dyes represented by the formula (1) include “Kayaset Violet A-R”, “Kayaset Blue N”, “Kayaset Blue FR”, and “Kayaset Green AB” manufactured by Nippon Kayaku Co., Ltd. Etc.

"Tetraazaporphyrin dyes"
Further, the tetraazaporphyrin-based dye preferably has a structure represented by the formula (3).

In the formula, each of R ^{23 to} R ³⁰ is independently a hydrogen atom, a chlorine atom, a fluorine atom, a bromine atom, a cyano group, a benzyl group, or one or more hydrogen atoms are substituted with a fluorine atom, a bromine atom or a chlorine atom. Benzyl group, phenyl group, phenyl group in which one or more hydrogen atoms are substituted with fluorine atom, bromine atom or chlorine atom, alkyl group having 1 to 10 carbon atoms, one or more hydrogen atoms in fluorine atom, bromine atom or chlorine An alkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, or an alkoxyl group having 1 to 10 carbon atoms in which one or more hydrogen atoms are substituted with fluorine, bromine or chlorine atoms One of the groups.
M ¹ is any ^one of Cu, Ni, Zn, Pd, Pt, VO, Co, and Mg.
R ^{23 to} R ³⁰ are preferably an alkyl group having 1 to 6 carbon atoms from the viewpoint of solubility in a solvent. M ¹ is preferably Cu or VO.

  Examples of the tetraazaporphyrin-based dye represented by the formula (3) include trade names “TAP-2”, “TAP-18”, and “TAP-45” manufactured by Yamada Chemical Co., Ltd.

  The tetraazaporphyrin-based dye can be preferably used because it can efficiently absorb the orange unnecessary light near the wavelength of 590 nm emitted from the PDP. From the viewpoint of durability, anthraquinone dyes are preferable. More preferably, a tetraazaporphyrin dye and an anthraquinone dye are used in combination.

  The near-infrared shielding film is provided to shield near-infrared light, and includes a near-infrared absorbing dye that absorbs near-infrared light. Near-infrared absorbing dyes include polymethine dyes, phthalocyanine dyes, naphthalocyanine dyes, aminium dyes, imonium dyes, diimonium dyes, anthraquinone dyes, dithiol metal complex dyes, naphthoquinone dyes, indolephenol dyes Examples thereof include dyes, azo dyes, triallylmethane dyes, and tungsten oxide dyes. Near infrared absorption dyes having a maximum absorption wavelength of 750 to 1100 nm are preferred for applications such as heat ray absorption and noise prevention of electronic equipment, and aminium dyes, phthalocyanine dyes, naphthalocyanine dyes, diimonium dyes, tungsten oxide dyes. Is particularly preferred.

  The near-infrared absorbing dye may be a single type or a mixture of two or more types. From the viewpoint of durability of the near-infrared absorbing dye, it is preferable to use only one kind or a combination of two or more phthalocyanine dyes. In addition to durability, it is more preferable to use a combination of two or more phthalocyanine dyes because they can absorb near infrared rays sufficiently and efficiently. A diimonium dye is also preferable because it can efficiently absorb near infrared rays.

"Diimonium dyes"
The diimonium dye is a compound represented by the following general formula (4).

In the formula, R ^{31 to} R ³⁸ are each independently a hydrogen atom, an alkyl group, an alkyl group having a substituent, an alkenyl group, an alkenyl group having a substituent, an aryl group, an aryl group having a substituent, an alkynyl group or a substituent. It represents an alkynyl group having a group, Z ^- represents an anion

In R ^{31 to} R ³⁸ , examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a secondary butyl group, an isobutyl group, a tertiary butyl group, and an n-pentyl group. , A tertiary pentyl group, an n-hexyl group, an n-octyl group, or a tertiary octyl group. The alkyl group may have a substituent such as an alkoxycarbonyl group, a hydroxyl group, a sulfo group, or a carboxyl group.

  Examples of the alkenyl group include a vinyl group, a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, and an octenyl group. The alkenyl group may have a substituent such as a hydroxyl group or a carboxy group.

  Examples of the aryl group include benzyl group, p-chlorobenzyl group, p-methylbenzyl group, 2-phenylmethyl group, 2-phenylpropyl group, 3-phenylpropyl group, α-naphthylmethyl group, and β-naphthyl. An ethyl group etc. are mentioned. The aryl group may have a substituent such as a hydroxyl group or a carboxy group.

  Examples of the alkynyl group include a propynyl group, a butynyl group, a 2-chlorobutynyl group, a pentynyl group, and a hexynyl group. The alkynyl group may have a substituent such as a hydroxyl group or a carboxy group.

R ^{31 to} R ³⁸ are preferably an n-butyl group or an isobutyl group. The n-butyl group or isobutyl group is preferable because it has excellent durability against moisture. Particularly preferred is an isobutyl group.

Z ⁻ represents chlorine ion, bromine ion, iodine ion, perchlorate ion, periodate ion, nitrate ion, benzenesulfonate ion, P-toluenesulfonate ion, methyl sulfate ion, ethyl sulfate ion, propyl sulfate ion, Tetrafluoroborate, tetraphenylborate, hexafluorate, benzenesulfinate, acetate, trifluoroacetate, propionate, benzoate, oxalate, succinate, malonate Oleate ion, stearate ion, citrate ion, monohydrogen diphosphate ion, dihydrogen monophosphate ion, pentachlorostannate ion, chlorosulfonate ion, fluorosulfonate ion, trifluoromethanesulfonate ion, hexa Fluoroarsenic acid On, hexafluoroantimonate ion, molybdate ion, tungstate ion, titanate ion, zirconate _{^{ion, (R f SO 2) 2}} N - or _{^{(R f SO 2) 3 C}} - [R f is C 1 -C Represents an anion of ˜4].

Among these anions, perchlorate ion, iodine ion, tetrafluoroborate ion, hexafluorophosphate ion, hexafluoroantimonate ion, trifluoromethanesulfonate ion, (R ^f SO ₂ ) ₂ N ⁻ , ( R _f SO _{2) 3} C ^- and the like are preferable, especially _{^{(R f SO 2) 2 N}} -, (R f SO 2) 3 C - preferably for the most excellent in thermal stability.

“Phthalocyanine dyes”
The phthalocyanine dye is not particularly limited as long as it is a compound having a phthalocyanine skeleton (see the following chemical formula (5)). M ² in the formula (5) is any one of Cu, Ni, Zn, Pd, Pt, VO, Co, and Mg, and is preferably Cu or VO. Among the phthalocyanine dyes, a near-infrared absorbing dye having a maximum absorption wavelength at 800 to 1100 nm is preferable because the near-infrared absorptivity of the pressure-sensitive adhesive composition is increased. Examples of the phthalocyanine dye having a maximum absorption wavelength at 800 to 1100 nm include, for example, trade name “EEX COLOR IR-12”, trade name “EEX COLOR IR-14”, and trade name “TX-EX” manufactured by Nippon Shokubai Co., Ltd. -906B ", trade name" TX-EX-910B ") and the like.

"Tungsten oxide dyes"
Tungsten oxide _pigments, W r _{O s} (provided that 2.2 ≦ s / r ≦ 2.999. ) Tungsten oxide microparticles represented by or _A t _W u _{O v,} (except, A is H, He, alkali metal, alkaline earth metal, rare earth element, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi, I It is preferable to be a composite tungsten oxide fine particle represented by an element selected from the following: 0.001 ≦ t / u ≦ 1.1, 2.2 ≦ v / u ≦ 3.0.

  These functional films 33 are bonded and laminated to the transparent substrate 31 and other functional films 33 by the adhesive layer 32. The type, stacking position, stacking order, and the like of the functional film 33 stacked on the transparent substrate 31 are not necessarily limited, but the color tone correction film and the near-infrared shielding film are arranged on the same plane or the back thereof so as not to overlap the masking layer 34. It is preferable to do. In the case where there are white letters or the like in which the inside is whitened in a part of the hiding layer 34 that is a solid coating shape, if a color tone correction film or a near-infrared shielding film is disposed on the front surface of the hiding layer 34, Since the inside of characters and the like is colored red or the like, the appearance is deteriorated. For this reason, when arrange | positioning a color tone correction film or a near-infrared shielding film, it is preferable to arrange | position on the same plane as the concealment layer 34, or its back surface.

  Examples of the adhesive layer 32 include an acrylic adhesive, a silicone adhesive, a butadiene adhesive, a urethane adhesive, and the like, and an acrylic adhesive is particularly preferable. The acrylic pressure-sensitive adhesive is made of a polymer containing an acrylic monomer unit as a main component. Examples of the acrylic monomer include (meth) acrylic acid, itaconic acid, (anhydrous) maleic acid, (anhydrous) fumaric acid, crotonic acid, and alkyl esters thereof. Here, “(meth) acrylic acid” is used as a general term for acrylic acid and methacrylic acid.

  The adhesive layer 32 may contain a dye such as a color tone correction dye that absorbs a part of a specific wavelength range of visible light to improve the color tone of transmitted visible light, or a near infrared absorption dye that absorbs near infrared light. it can. As the color tone correcting dye and the near infrared ray absorbing dye, those similar to those in the above color tone correcting film and near infrared ray shielding film are preferably used.

  In addition, it is preferable to arrange | position the adhesion layer 32 containing a pigment | dye on the same plane which does not overlap with the concealment layer 34, or its back surface. That is, it is preferable that the adhesive layer 32 disposed on the front surface of the masking layer 34 does not contain a dye. As already described, in the case where there are white letters or the like in which the inside is whitened in a part of the concealing layer 34 that is solid-coated, the adhesive layer 32 containing a pigment is disposed on the front surface of the concealing layer 34. Then, the inside of the white letters or the like is easily colored and colored red. For this reason, when providing the adhesion layer 32 containing a pigment | dye, it is preferable to provide on the same plane which does not overlap with the masking layer 34, or its back surface.

  The concealment layer 34 conceals parts such as connectors arranged at the periphery of the image display area to improve the design, and is also called a black frame or a print frame. As the concealing layer 34, for example, a resin composition containing an inorganic material obtained by printing and high-temperature baking of a composition containing a low-melting glass and a light-shielding pigment, or a light-shielding pigment or the like. The thing mainly consisting of an organic material obtained by printing of a thing is mentioned.

  The concealing layer 34 made of an inorganic material is not necessarily excellent in productivity because high temperature firing is required for formation, and the formed base material is required to have heat resistance, but has high bonding strength with the base material. it can. Further, the concealing layer 34 mainly made of an organic material does not necessarily have a high bonding strength with the base material, but does not require high-temperature firing, and is excellent in productivity because it can be formed by printing on a roll-shaped functional film 33.

  The concealing layer 34 may be provided at least on the entire circumference of the peripheral edge portion 3a, but it is preferable to provide the concealing layer 34 from the outer end portion 3b of the optical filter 3 to a position of 20 to 120 mm inside. In the case of 20 to 50 mm, the concealability of components such as connectors arranged at the periphery of the image display area is slightly lowered, but the width of the concealment layer 34 can be narrowed to improve the design. The thickness of 50 to 120 mm is preferable because components such as connectors can be reliably concealed. If the formation range of the concealing layer 34 is widened, the optical filter 3 is unnecessarily enlarged and the image display area is reduced, and the productivity is also reduced. preferable.

  As the optical filter 3 used in the first fixing method, for example, as shown in FIG. 1, a concealing layer 34 is provided on the front surface of the transparent substrate 31, and functions on the front surface of the transparent substrate 31 via the adhesive layer 32. The functional film 33 is laminated | stacked and the functional film 33 is laminated | stacked through the adhesion layer 32 on the back part.

  In the case of the first fixing method, the adhesive layer 32 and the functional film 33 laminated on the front surface portion of the transparent substrate 31 can be provided up to the outer end portion of the transparent substrate 31. On the other hand, it is preferable that the adhesive layer 32 and the functional film 33 laminated on the back surface portion of the transparent substrate 31 have a shape that does not overlap the fixing jig 5 and the adhesive layer 6. Since the adhesive force between the transparent substrate 31 and the adhesive layer 32 and between the adhesive layer 32 and the functional film 33 is not necessarily high, it is easy to peel off when the fixing jig 5 is adhered, and the optical filter 3 can be fixed securely. There is a risk of disappearing.

  By providing the concealing layer 34 on the front surface portion of the transparent substrate 31, the fixing jig 5 can be directly bonded to the back surface portion of the transparent substrate 31, and a high adhesive force can be obtained. In such a case, since the fixing jig 5 is not bonded to the concealing layer 34, a high adhesive force is not required, and the masking layer 34 may be mainly made of an organic material that does not require high-temperature firing. Can be used as the transparent substrate 31 without heat resistance, and the degree of freedom of material selection is increased, and the productivity can be improved depending on the selected material.

  When the adhesive layer 32 of the optical filter 3 contains a color tone correction dye or a near-infrared absorbing dye, the adhesive layer 32 is disposed on the back surface of the masking layer 34, in other words, is disposed on the back surface of the transparent substrate 31. It is preferable to be included in the adhesive layer 32. That is, when the adhesive layer 32 containing a dye is provided in the configuration in which the masking layer 34 is provided on the front surface portion of the transparent substrate 31, the adhesive layer 32 containing the dye is preferably provided at least on the back side of the transparent substrate 31.

  FIG. 2 shows a first modification of the optical filter 3 used in the first fixing method. The concealing layer 34 is not limited to the front surface portion of the transparent substrate 31 as shown in FIG. When the concealing layer 34 is provided on the back surface portion, the transparent substrate 31 is disposed on the front surface of the concealing layer 34, so that the texture of the transparent substrate 31 can be imparted to the concealing layer 34, and also due to steps or irregularities of the concealing layer 34. Appearance defects of the optical filter 3 can be suppressed.

  That is, a step is formed at the boundary portion between the portion where the concealing layer 34 is formed and the portion where the concealing layer 34 is not formed, and the surface of the concealing layer 34, specifically, the main surface opposite to the transparent substrate 31. Are formed with fine irregularities generated in printing or the like during formation. As shown in FIG. 1, when the concealment layer 34 is formed on the front surface of the transparent substrate 31, the step or unevenness faces the front surface, so that the step or the unevenness faces the front surface of the optical filter 3 through the adhesive layer 32 or the functional film 33. Unevenness is likely to appear. As shown in FIG. 2, by forming the concealing layer 34 on the back surface of the transparent substrate 31, it is possible to suppress the appearance of steps or irregularities on the front surface and to suppress appearance defects.

  When such an adhesive layer 32 of the optical filter 3 contains a color tone correction dye or a near-infrared absorbing dye, the adhesive layer 32 is disposed on the same plane as the concealing layer 34, in other words, disposed on the back surface of the transparent substrate 31. It is preferable to contain a pigment in the adhesive layer 32. That is, when the adhesive layer 32 containing a pigment is provided in the configuration in which the concealing layer 34 is provided on the back surface portion of the transparent substrate 31, the adhesive layer 32 containing the pigment may be provided at least on the back side of the transparent substrate 31. .

  FIG. 3 shows a second modification of the optical filter 3 used in the first fixing method. The concealing layer 34 can also be provided on the functional film 33 disposed on the front surface of the transparent substrate 31. When the concealing layer 34 is provided on the functional film 33 disposed on the front surface of the transparent substrate 31, for example, it is provided on the back surface portion of the functional film 33.

  In the case of the configuration in which the concealing layer 34 is provided on the functional film 33, for example, the concealing layer 34 can be formed on the roll-shaped functional film 33, so that the concealing layer 34 can be formed efficiently. Further, by providing the concealing layer 34 on the functional film 33 disposed on the front surface of the transparent substrate 31, the concealing layer 34 and the adhesive layer 32 disposed on the front surface of the transparent substrate 31 are located on the same plane. The adhesive layer 32 can contain a pigment. For this reason, even when it is necessary to provide the adhesive layer 32 containing a pigment | dye, as shown to FIG. 1, 2, it becomes unnecessary to provide the adhesive layer 32 containing a pigment | dye separately in the back part of the transparent substrate 31. FIG. Furthermore, by providing the concealing layer 34 on the back surface of the functional film 33, the unevenness can be directed to the back surface, and the appearance defect can be suppressed by suppressing the appearance of the unevenness on the front surface.

  4-6 shows the 3rd-5th modification of the optical filter 3 used for the 1st fixing method. The optical filter 3 has a size that completely covers the front surface of the housing 4 as shown in FIGS. 4 to 6 in addition to a size that fits within the frame of the housing 4 as shown in FIGS. You can also. By setting it as such an optical filter 3, the housing | casing 4 can be hidden and the front part of the plasma display apparatus 1 can be made into a perfect flat shape, and design property can be improved more. In addition, about the optical filter 3 of the 3rd-5th modification shown to FIGS. 4-6, it has the structure and effect similar to the optical filter 3 shown in FIGS. 1-3 except that the magnitude | size differs.

  The optical filter 3 used in the second fixing method is also provided with a concealing layer 34 on the front surface of the transparent substrate 31 as shown in FIG. The film 33 is laminated, and the functional film 33 is laminated on the back surface via the adhesive layer 32.

  Regarding the second fixing method, the peripheral edge portion 3a is sandwiched and fixed in the thickness direction, and the fixing jig 5 is not bonded to the back surface portion as in the first fixing method. Similar to the adhesive layer 32 and functional film 33 laminated on the front surface of the substrate, the adhesive layer 32 and functional film 33 laminated on the rear surface can also be provided up to the vicinity of the outer edge of the transparent substrate 31. Can be provided up to a free position as long as the end of the functional film on the back surface is not visually recognized.

  Also in this case, the effect when the concealing layer 34 is provided on the front surface portion of the transparent substrate 31 is the same as in the case of the first fixing method. Further, when the adhesive layer 32 contains a dye such as a color tone correcting dye or a near-infrared absorbing dye, the adhesive layer 32 disposed on the back surface of the masking layer 34, in other words, the adhesive layer 32 disposed on the back surface of the transparent substrate 31. It is preferable to contain a pigment.

  FIG. 8 shows a first modification of the optical filter 3 used in the second fixing method. The concealing layer 34 is not limited to the front surface portion of the transparent substrate 31 as shown in FIG. Also in this case, the adhesive layer 32 and the functional film 33 laminated on the back surface portion of the transparent substrate 31 can be provided to the vicinity of the outer end portion of the transparent substrate 31, and the functional film end portion on the back surface is not visually recognized from the front surface. It can be provided up to any position within the range.

  Moreover, the effect when the concealing layer 34 is provided on the back surface of the transparent substrate 31 is the same as that in the case of the first fixing method. Further, when the adhesive layer 32 contains a dye such as a color tone correcting dye or a near-infrared absorbing dye, the adhesive layer 32 on the same plane as the concealing layer 34 or the back surface thereof, that is, the adhesive layer disposed on the back surface of the transparent substrate 31. 32 preferably contains a pigment.

  FIG. 9 shows a second modification of the optical filter 3 used in the second fixing method. The concealing layer 34 can also be provided on the functional film 33 disposed on the front surface of the transparent substrate 31. When the concealing layer 34 is provided on the functional film 33 disposed on the front surface of the transparent substrate 31, for example, it is provided on the back surface portion of the functional film 33. The effect when the concealing layer 34 is provided on the functional film 33 disposed on the front surface of the transparent substrate 31 is the same as in the case of the first fixing method.

  FIG. 10 shows a third modification of the optical filter 3 used in the second fixing method. About the optical filter 3 used for the 2nd fixing method, the concealment layer 34 can also be provided in the functional film 33 arrange | positioned at the back surface of the transparent substrate 31. FIG. In this case, the masking layer 34 is provided on the back surface of the functional film 33, for example.

  As for the second fixing method, the peripheral edge portion 3a is sandwiched and fixed in the thickness direction, and the fixing jig 5 is not bonded to the back surface portion unlike the first fixing method. Similar to the adhesive layer 32 and the functional film 33 laminated on the front surface portion, the adhesive layer 32 and the functional film 33 laminated on the back surface portion of the transparent substrate 31 can be provided up to the outer end portion of the transparent substrate 31. . Therefore, the hiding layer 34 can be provided on the peripheral edge 3 a of the optical filter 3 by providing the hiding layer 34 on the peripheral edge of the functional film 33 that reaches the outer edge of the transparent substrate 31.

  By providing the concealing layer 34 on the functional film 33 disposed on the back surface of the transparent substrate 31, the transparent substrate 31 is disposed on the front surface of the concealing layer 34, so that the texture of the transparent substrate 31 is imparted to the concealing layer 34. In addition, it is possible to suppress the appearance defect of the optical filter 3 due to the level difference or unevenness of the masking layer 34. In particular, by providing the concealing layer 34 on the back surface of the functional film 33, it is possible to suppress the appearance defect of the optical filter 3 due to the unevenness of the concealing layer 34.

  The optical filter 3 has a functional film 33 laminated on the front surface of the transparent substrate 31 via an adhesive layer 32 and functions on the back surface via an adhesive layer 32 (first adhesive layer 32 on the back side). The functional film 33 (the first functional film 33 on the back side) is laminated, and further the functional film 33 (the second functionality on the back side) via the adhesive layer 32 (the second adhesive layer 32 on the back side). A film 33) is laminated, and a concealing layer 34 is formed on the back side of the first functional film 33 on the back side.

  When the adhesive layer 32 of the optical filter 3 contains a dye such as a color tone correcting dye or a near-infrared absorbing dye, the adhesive layer 32 disposed on the same plane as the concealing layer 34 or on the back thereof, that is, the back side first layer. Preferably, the second adhesive layer 32 contains a pigment.

  As described above, the plasma display device 1 has been described. However, the number of the adhesive layers 32 and the functional films 33 in the optical filter 3 is not necessarily limited to those illustrated, and can be appropriately increased or decreased as necessary. Further, the first and second fixing methods can be applied independently to each side of the peripheral edge portion 3a of the optical filter 3 as shown in FIG. 11, for example, and the fixing method may be different for each side. Furthermore, the laminated structure of the optical filter 3 is preferably the same laminated structure in the central portion excluding the peripheral edge portion 3a, but the laminated structure of each side in the peripheral edge portion 3a may be different. For example, the stacking position of the concealing layer 34 may be different depending on the fixing method.

  Hereinafter, the plasma display device of the present invention will be described more specifically with reference to examples.

Example 1
An optical filter was produced by the following procedure.
Prepare a roll of anti-reflection film (trade name “Realak 7800” manufactured by NOF Corporation), and use it for a 42-inch display by gravure printing on the main surface opposite to the main surface on which the anti-reflection layer is formed. A black frame (hiding layer) was printed. At this time, the thickness of the black frame was about 4.5 μm.

  An acrylic resin adhesive (thickness 25 μm) containing a coloring pigment for color tone correction and near infrared absorption was laminated on the main surface on which the black frame was formed. The coloring pigments include neon cut pigments (manufactured by Yamada Chemical Co., Ltd., trade name “TAP2”) and color correction pigments (manufactured by Nippon Kayaku Co., Ltd., trade names “KAYASORB VIOLET A-R”, “KAYASORB GREEN A-B”). And near-infrared absorbing dyes (trade name “IR-14”, “IR-20”, “IR-915”, manufactured by Nippon Shokubai Co., Ltd.), etc. The rate (850 nm to 950 nm) was adjusted to 15% or less.

  Separately, a glass substrate (thickness: 1.1 mm) having dimensions of 600 mm in length and 1000 mm in width, chamfered and chemically strengthened was prepared. The antireflection film having the black frame described above was bonded to the front surface of the glass substrate. A rubber-coated pressure roller was used for pasting. After bonding, autoclave treatment was performed for 60 minutes at a temperature of 60 ° C. and a pressure of 0.95 MPa to obtain an optical filter.

Next, a fixing jig was attached to the optical filter by the following procedure.
The optical filter was fixed on a horizontal table with the back side facing upward. At a position where the black frame is formed and cannot be seen from the front surface, a metal fixing jig is bonded using a two-component epoxy adhesive (manufactured by Sumitomo 3M Co., Ltd., trade name “EXP636”) as an adhesive layer. And allowed to stand at room temperature for 24 hours. As the fixing jig, a screw hole processed in advance at one place per one fixing jig was used. Moreover, what has a plane part was used so that it could contact with a plane with respect to the optical filter which is planar.

Note that the position of the fixing jig installed on the optical filter was aligned with the fixing portion prepared on the display panel side so that the optical filter could be fixed with screws when fixing the optical filter to the front surface of the display panel. Fixture is two on all four sides of the black frame, a total of eight place, area fixture per piece is in contact with the optical filter via the adhesive layer was 2.4 cm ^2. The area ratio of the adhesive layer to the area of the optical filter at this time was 0.3%.

  Next, an optical filter was fixed to the display panel by the following procedure to obtain a plasma display device. The optical filter was fixed to the display panel by disposing an optical filter on the front surface of the 42-inch display panel and screwing the fixing jig installed on the optical filter from the back side of the display panel. Screwing was performed at one place for one jig, a total of eight places.

(Example 2)
A plasma display device was obtained in the same manner as in Example 1 except that a fixing jig was installed on the optical filter by the following method.

The optical filter was fixed on a horizontal table with the back side facing upward. At a room temperature, a metal fixing jig is fixed using an acrylic foam tape (manufactured by Sumitomo 3M Ltd., trade name “VHB Y4910J”) as an adhesive layer at a position where it cannot be seen from the front of the part where the black frame is formed. The fixture was used for the fixing jig having a larger area in the plane portion than that of Example 1. When fixing the optical filter to the front surface of the display panel, the fixing jig was attached to the optical filter. The position of the fixed jigs installed was aligned with the fixed part prepared on the plasma display panel side, two fixed jigs were placed on all four sides of the black frame, for a total of eight fixed jigs. The area where the jig was in contact with the optical filter through the adhesive layer was 5.5 cm ^2. The area ratio of the adhesive layer to the area of the optical filter at this time was 0.7%.

(Comparative Example 1)
A glass substrate (thickness: 2.5 mm) having dimensions of 600 mm in length and 1000 mm in width, chamfered and chemically strengthened was prepared. An optical filter was obtained in the same manner as in Example 1 except that this glass substrate was used.

Next, a fixing jig was attached to the optical filter by the following procedure.
The optical filter was fixed on a horizontal table with the back side facing upward. At a position where the black frame is not visible from the front side, a metal fixing jig is bonded using a two-component epoxy adhesive (manufactured by Sumitomo 3M Ltd., trade name “EXP636”) as an adhesive layer. And allowed to stand at room temperature for 24 hours. As the fixing jig, a screw hole processed in advance at two locations per fixing jig was used. Moreover, what has a plane part was used so that it could contact with a plane with respect to the optical filter which is planar. The position of the fixing jig installed on the optical filter was aligned with the fixing part prepared on the display panel side so that the optical filter could be fixed with screws when fixing the optical filter to the front surface of the display panel. A total of eight fixing jigs were arranged on all four sides of the black frame, and the area where each fixing jig was in contact with the optical filter through the adhesive layer was 4.8 cm ² . The area ratio of the adhesive layer to the area of the optical filter at this time was 0.6%.

  Next, an optical filter was fixed to the display panel by the following method to obtain a plasma display device. The optical filter was fixed to the display panel by disposing an optical filter on the front surface of the 42-inch display panel and screwing the fixing jig installed on the optical filter from the back side of the display panel. Screwing was performed at two places for one jig, a total of 16 places.

  In the plasma display devices of Examples 1 and 2 and Comparative Example 1, the optical filter is fixed to the display panel using only a fixing jig, and the periphery of the optical filter is fixed in the thickness direction. Did not do.

  In the plasma display devices of Examples 1 and 2 and Comparative Example 1 thus obtained, the peripheral edge of the optical filter can be exposed to the front surface, and the front surface portion is flat without unevenness or steps. As a result, the design can be improved.

However, in the plasma display device of Example 1, since the glass substrate is as thin as 1.1 mm and lightweight, the bonding area of the fixing jig per one is 2.4 cm ² , and the area of the bonding layer Even if the ratio is 0.3%, it is possible to suppress dropping of the optical filter when vibration is assumed assuming transportation, etc., but for the plasma display device of Comparative Example 1, the glass substrate is as thick as 2.5 mm, In order to suppress dropping of the optical filter when the same vibration is applied because it is heavy, the bonding area of each fixing jig is 4.8 cm ² , the area ratio of the bonding layer is 0.6%, It is also necessary to increase the number of screw holes in the fixing jig, which is not excellent in productivity.

  DESCRIPTION OF SYMBOLS 1 ... Plasma display apparatus, 2 ... Display panel, 3 ... Optical filter, 3a ... Peripheral part, 3b ... Outer edge part, 4 ... Housing | casing, 4a ... Outer edge part, 4b ... Inner edge part, 5 ... Fixing jig, 6 ... Adhesive layer, 31 ... Glass substrate, 32 ... Adhesive layer, 33 ... Functional film, 34 ... Hiding layer

Claims (8)

A plasma display device comprising: a display panel; and an optical filter disposed on a front surface of the display panel and having a transparent substrate having a thickness of 0.5 to 2.0 mm and one or more functional films laminated on the transparent substrate. There,
The optical filter has a frame-shaped concealing layer at the peripheral edge, and at least one side of the peripheral edge is exposed to the front surface.   The plasma display apparatus according to claim 1, wherein the transparent substrate is tempered glass.   3. The plasma display device according to claim 1, further comprising a fixing jig that is bonded to a back surface portion of the optical filter so as to overlap the peripheral edge portion and fixes the optical filter.   The plasma display apparatus according to claim 3, wherein the fixing jig is bonded to the optical filter via an adhesive layer, and a ratio of an area of the adhesive layer to an area of the optical filter is 5% or less.   The at least one functional film in the one or more functional films is laminated on a back surface portion of the transparent substrate, and the functional film laminated on the back surface of the transparent substrate has a shape that does not overlap the fixing jig. 5. The plasma display device according to 3 or 4.   6. The plasma display device according to claim 1, wherein the optical filter has an adhesive layer containing a dye on the same plane as the concealing layer or on the back side thereof.   The plasma display apparatus according to claim 1, wherein the concealing layer is formed on the transparent substrate.   The plasma display device according to claim 1, wherein the concealing layer is formed on at least one functional film of the one or more functional films.

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