JP2012234028A - Optical filter and display device - Google Patents

Abstract

An optical filter capable of improving the design of a PDP device and the image quality of a display image and suppressing reflection is provided.
An optical filter includes a first filter unit and a second filter unit. The first filter unit 4 is stacked on the PDP body 2 and has at least one functional layer other than the colored layer 52. The second filter unit 5 is provided separately from the first filter unit, and is disposed on the viewing side of the first filter unit 5. The second filter unit 5 includes a transparent substrate 51 and a colored layer 52 laminated on the PDP main body side of the transparent substrate 51. The first filter unit 4 and the second filter unit 5 are configured such that the haze value of the first filter unit 4 is larger than the haze value of the second filter unit 5.
[Selection] Figure 1

Description

  The present invention relates to an optical filter and a display device.

  A plasma display panel (PDP) apparatus can simultaneously satisfy an increase in size and thickness as compared with a CRT (Cathode Ray Tube), and the demand thereof has been increasing in recent years. In addition, the PDP device is excellent in various display capabilities such as display capacity, brightness, contrast, afterimage, and viewing angle.

  The PDP apparatus displays an image using a gas discharge phenomenon, and discharges the gas between the electrodes with a direct current or an alternating voltage applied to the electrodes, and excites the phosphor with ultraviolet light accompanying the discharge to emit light. However, the emission amount of electromagnetic waves and near infrared rays is large due to the light emission principle. Electromagnetic waves and near infrared rays may affect the human body and may cause malfunction of precision equipment such as a radio telephone and a remote controller.

  Therefore, the PDP device is provided with a functional layer such as an electromagnetic wave shielding layer for shielding electromagnetic waves and a near infrared shielding layer for shielding near infrared rays. These functional layers are usually laminated on a front plate made of a glass substrate or the like disposed on the viewing side of the PDP main body, which is the main display unit, that is, on the front surface. In addition to these functional layers, the front plate is provided with, for example, a contrast improving layer for improving contrast, a color tone correcting layer for correcting color tone, and the like. The front plate is disposed at a distance from the PDP main body and is disposed in close contact with the PDP main body with an adhesive layer (see, for example, Patent Document 1).

JP 2007-183645 A

  As described above, the front plate is provided with functional layers such as an electromagnetic wave shielding layer, a near infrared shielding layer, a contrast enhancement layer, and a color tone correction layer. However, when all the functional layers are provided on the front plate, the transparency of the front plate is lowered and the image quality of the display image is likely to be lowered. Although the image quality can be improved by bringing the front plate closer to the PDP body, good image quality cannot always be obtained.

  It is also conceivable to eliminate the front plate and directly stack each functional layer on the PDP body. However, when the front plate is abolished, it is not possible to impart a texture such as glass as a substrate material, and it is not possible to form a concealing layer such as a black frame that conceals parts such as connectors arranged at the periphery of the image display area, It is not necessarily preferable from the viewpoint of design. It is also conceivable that the front plate is only the substrate or only the substrate and a part of the functional layers, and other functional layers are provided on the PDP body. However, simply providing a part of the functional layer in the PDP main body does not necessarily provide a good image quality, and reflection on the front plate tends to occur.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an optical filter that can improve the design of a PDP device and the image quality of a display image, and can suppress reflection. Another object of the present invention is to provide a PDP device having the optical filter.

  The optical filter of the present invention includes a first filter unit and a second filter unit. The first filter portion is laminated on the plasma display panel body and has at least one functional layer other than the colored layer. The second filter unit is provided separately from the first filter unit, and is disposed on the viewing side of the first filter unit. The second filter unit includes a transparent substrate and a colored layer laminated on the plasma display panel main body side of the transparent substrate. Further, the first filter unit and the second filter unit are configured such that the haze value of the first filter unit is larger than the haze value of the second filter unit.

  The plasma display panel device of the present invention includes a plasma display panel main body and an optical filter provided in the plasma display panel main body. The plasma display panel device of the present invention has the above-described optical filter of the present invention as an optical filter.

  According to the optical filter of the present invention, the first filter unit and the second filter unit are configured, and the configuration of each unit is set to a predetermined configuration, so that the designability of the PDP device and the image quality of the display image are improved. Also, reflection can be suppressed.

  According to the plasma display panel device of the present invention, by providing the optical filter of the present invention described above, the design property and the image quality of the display image can be improved, and the reflection can be suppressed.

Sectional drawing which shows an example of the optical filter and plasma display panel apparatus of this invention.

  Hereinafter, the optical filter and the plasma display panel apparatus of the present invention will be described in detail. In the following description, the plasma display panel device is referred to as a PDP device, and the plasma display panel body is referred to as a PDP body.

  The optical filter of the present invention includes a first filter portion and a second filter portion. The first filter portion is laminated on the PDP main body and has at least one functional layer other than the colored layer. The second filter unit is separated from the first filter unit and is disposed on the viewing side of the first filter unit. The second filter unit has a transparent substrate and a colored layer laminated on the PDP main body side of the transparent substrate. Further, the first filter unit and the second filter unit are configured such that the haze value of the first filter unit is larger than the haze value of the second filter unit.

  According to the optical filter of the present invention, the second filter portion, particularly the transparent substrate, separated from the first filter portion is provided on the viewing side of the first filter portion laminated on the PDP main body, whereby the substrate A material texture, for example, a glass texture can be imparted. Furthermore, by providing a transparent substrate, a black frame or the like that is a concealing layer for concealing components such as connectors arranged at the periphery of the image display region can be provided, and the design can be improved.

  Then, by providing at least one functional layer other than the colored layer in the conventional optical filter for PDP in the first filter portion, the functional layer other than the colored layer in the second filter portion is omitted, and its transparency is reduced. The image quality of the displayed image can be improved. The functional layers other than the colored layer in the present invention do not include the antiglare layer and the antireflection layer described later. Examples of the functional layer other than the colored layer include those that lower transparency, such as an electromagnetic wave shielding layer and a contrast enhancement layer, but are not necessarily limited to these.

  In particular, by making the haze value of the first filter unit on the PDP main body side larger than the haze value of the second filter unit on the viewing side, in other words, by reducing the haze value of the second filter unit The image quality of the display image can be improved with sufficient transparency of the second filter section. The haze value of the first filter part is preferably 2 to 40%, more preferably 5 to 30%, and particularly preferably 5 to 20%. Further, the haze value of the second filter part is preferably 5% or less, more preferably 3% or less, in a range smaller than the haze value of the first filter part. By setting each haze value within the above range, the image quality of the display image can be further improved.

  On the other hand, by providing a colored layer on the PDP main body side of the transparent substrate in the second filter portion, when a black frame is provided on the periphery of the transparent substrate, the visibility of the black frame from the viewing side is improved and the design property is improved. It can be improved. Further, by providing the colored layer at the above position, the reflected light in the optical filter can be effectively absorbed, and reflection on the optical filter can also be suppressed.

  In the optical filter of the present invention, it is preferable that the luminous transmittance of the first filter portion is larger than the luminous transmittance of the second filter portion. The image quality of the display image can be improved by making the luminous transmittance of the first filter unit larger than the luminous transmittance of the second filter unit. The luminous transmittance of the first filter part is preferably 55 to 80%, and the luminous transmittance of the second filter part is preferably 40 to 65%.

  Further, the luminous reflectance of the optical filter of the present invention is preferably 5% or less. By setting the luminous reflectance to 5% or less, reflection on the optical filter can be effectively suppressed. The luminous reflectance is preferably 4% or less, and more preferably 3% or less.

Hereinafter, an optical filter and a PDP apparatus will be specifically described with an example.
FIG. 1 is a cross-sectional view showing an example of an optical filter and a PDP device.

  The PDP device 1 includes a PDP main body 2 that is an image display unit, and an optical filter 3 that is disposed on the viewing side of the PDP main body 2. The optical filter 3 includes a first filter unit 4 stacked on the PDP main body 2 and a second filter unit 5 that is separated from the first filter unit and disposed on the viewing side of the first filter unit 4. And have.

  The 1st filter part 4 has the electromagnetic wave shielding film 41, the contrast improvement film 42, and the antireflection film 43 in order from the PDP main body 2 side, for example. Each film is bonded by the adhesive layer 44.

  The electromagnetic wave shielding film 41 has, for example, a metal mesh layer as an electromagnetic wave shielding layer on a transparent substrate. Since the electromagnetic wave shielding film 41 is not necessarily highly transparent, by providing it in the first filter unit 4, it is possible to improve the transparency of the second filter unit 5 and improve the image quality of the display image. Such an electromagnetic wave shielding film 41 is usually obtained by pasting a copper foil on a transparent substrate and then processing the copper foil into a mesh shape, or meshing a conductive ink such as copper or silver on the transparent substrate. It is manufactured by printing in the form.

  Examples of the electromagnetic wave shielding film 41 include a film in which an electromagnetic wave shielding layer is formed on a transparent substrate by a sputtering method. The electromagnetic wave shielding layer is, for example, one in which metal oxide layers and metal layers are alternately stacked, the number of metal layers is n, and the number of metal oxide layers is n + 1 (however, n is an integer of 1 or more. The metal oxide layer is preferably made of an oxide of indium and tin, an oxide of titanium and zinc, an oxide of aluminum and zinc, an oxide of niobium, or the like. The metal layer is preferably made of silver, a silver alloy or the like.

  The transparent substrate of the electromagnetic wave shielding film 41 is made of, for example, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, a cellulose resin such as triacetyl cellulose, an acrylic resin, or a polycarbonate resin. Among these, polyethylene terephthalate and triacetyl cellulose are preferable from the viewpoints of transparency and processability.

  10-500 micrometers is preferable, as for the thickness of the transparent base | substrate of the electromagnetic wave shielding film 41, 30-300 micrometers is more preferable, and 50-200 micrometers is more preferable. By setting the thickness of the transparent substrate to 10 μm or more, damage such as tearing during manufacturing can be suppressed. Further, it is preferable that the thickness of the transparent substrate is 500 μm or less because workability is improved and visible light transmittance is increased.

  The contrast enhancement film 42 suppresses a decrease in contrast due to external light. Since the transparency of the contrast enhancement film 42 is not necessarily high, providing the first filter unit 4 increases the transparency of the second filter unit 5, that is, reduces the haze value, thereby improving the image quality of the display image. Can be improved. Further, by providing the contrast improving film 42 in the first filter unit 4, the effect of improving the contrast of the display image can be increased as compared with the case of providing the second filter unit 5.

  The contrast enhancement film 42 includes, for example, a transparent substrate 42a, a plurality of light-transmitting regions 42b formed on the transparent substrate 42a, extending in the horizontal direction, and arranged in parallel to each other, and the space between the light-transmitting regions 42b. And a dark color portion 42c having a wedge-shaped cross section. The dark portion 42c contains dark particles, and the cross-sectional shape thereof may be a substantially trapezoidal shape, a square shape, a rectangular shape, or the like in addition to a wedge shape.

  The transparent substrate 42a is made of, for example, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, a cellulose resin such as triacetyl cellulose, an acrylic resin, or a polycarbonate resin. Among these, polyethylene terephthalate and triacetyl cellulose are preferable from the viewpoints of transparency and processability. The translucent region 42b and the dark portion 42c are usually formed using a resin composition containing an ultraviolet curable resin and a photopolymerization initiator.

  10-500 micrometers is preferable, as for the thickness of the transparent base | substrate 42a, 30-300 micrometers is more preferable, and 50-200 micrometers is further more preferable. By setting the thickness of the transparent substrate 42a to 10 μm or more, breakage such as tearing during manufacturing can be suppressed. In addition, it is preferable that the thickness of the transparent substrate 42a be 500 μm or less because workability is improved and visible light transmittance is increased.

  According to such a contrast enhancement film 42, it is possible to improve the contrast of a display image by absorbing external light by the dark color portion 42c containing dark color particles, and the light transmitting region 42b does not contain dark color particles. It is possible to suppress a decrease in visibility due to the display image becoming dark without excessively decreasing the performance.

  The antireflection film 43 suppresses reflection of visible light. It is preferable that such an antireflection film 43 or an antiglare film described later or an antiglare film having an antireflection effect is provided on the outermost surface on the viewing side of the first filter portion 4. By providing these films, reflection can be suppressed or the contrast of the display image can be improved.

  The antireflection film 43 has an antireflection layer on a transparent substrate. The transparent substrate of the antireflection film 43 is made of, for example, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, a cellulose resin such as triacetyl cellulose, an acrylic resin, or a polycarbonate resin. Among these, polyethylene terephthalate and triacetyl cellulose are preferable from the viewpoints of transparency and processability.

  The thickness of the transparent substrate of the antireflection film 43 is preferably 10 to 500 μm, more preferably 30 to 300 μm, and still more preferably 50 to 200 μm. By setting the thickness of the resin film to 10 μm or more, breakage such as tearing during manufacturing can be effectively suppressed. Moreover, it is preferable for the thickness of the resin film to be 500 μm or less because workability is improved and visible light transmittance is increased.

  Examples of the antireflection layer include a 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.

  As the antireflection film 43, a film in which an antireflection layer of a low refractive index material made of a fluoropolymer is formed on one surface of a polyethylene terephthalate film is particularly preferable. In this case, the refractive index of the low refractive index material is preferably 1.1 to 1.6, more preferably 1.2 to 1.5, and still more preferably 1.3 to 1.48.

  Instead of the antireflection film 43, the first filter portion 4 may be provided with an antiglare film (antiglare film) that reduces reflection due to reflection of visible light, or an antiglare film having an antireflection effect. It may be provided. The anti-glare film has an anti-glare layer composed of uneven portions provided on the surface. The antiglare layer has an effect of diffusing a reflected image reflected on the surface by the uneven portions provided on the surface and blurring the outline, and generation of Newton rings at the interface between the first filter unit 4 and the second filter unit 5 Has the effect of suppressing

  As the antiglare film, the surface of the transparent substrate is coated with a solution in which inorganic fine particles such as silica or organic fine particles such as acrylic resin are dispersed in a binder, and the solvent is volatilized to form an antiglare layer composed of uneven portions. And those obtained by forming an antiglare layer composed of irregularities on the transparent substrate itself by sandblasting, etching or the like. Moreover, it can be set as the anti-glare film which has an anti-reflective effect by forming an anti-reflective layer on an anti-glare layer.

  The transparent base of the antiglare film is made of, for example, a polyester resin such as polyethylene terephthalate or polybutylene terephthalate, a cellulose resin such as triacetyl cellulose, an acrylic resin, or a polycarbonate resin. Among these, polyethylene terephthalate and triacetyl cellulose are preferable from the viewpoints of transparency and processability.

  The pressure-sensitive adhesive layer 44 is used to bond each film, and is made of, for example, an acrylic pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, a butadiene-based pressure-sensitive adhesive, or a urethane-based pressure-sensitive adhesive, and an acrylic pressure-sensitive 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 same applies to (meth) acrylate.

  For example, after the first filter unit 4 is provided with an adhesive layer 44 on each of the contrast enhancement film 42, the electromagnetic wave shielding film 41, and the antireflection film 43, the first filter unit 4 is bonded and integrated with each adhesive layer 44. Manufactured. The integrated product can be bonded to the PDP main body 2 by the adhesive layer 44 that was not used for bonding. The first filter unit 4 may be formed by, for example, sequentially bonding the contrast improving film 42, the electromagnetic wave shielding film 41, and the antireflection film 43 to the PDP body 2 with the adhesive layer 44.

  The second filter unit 5 is separated from the first filter unit 4 and is arranged on the viewing side of the first filter unit 4. The second filter unit 5 may be arranged with a gap between the second filter unit 5 and the first filter unit 4, or may be arranged in contact with the first filter unit 4. The second filter unit 5 may be in contact with the first filter unit 4 but is not subjected to adhesion by an adhesive layer or the like. The interval between the first filter unit 4 and the second filter unit 5 is usually preferably 10 mm or less, and more preferably 5 mm or less.

  The second filter unit 5 has a transparent substrate 51. For example, a colored layer 52 and a PDP main body side antireflection film 53 are provided in this order on the PDP main body 2 side of the transparent substrate 51. In addition, a viewing-side antireflection film 54 is provided on the viewing side of the transparent substrate 51. The PDP main body side antireflection film 53 is bonded to the transparent substrate 51 by the colored layer 52, and the visual recognition side antireflection film 54 is bonded to the transparent substrate 51 by the adhesive layer 44.

  The transparent substrate 51 is, for example, a glass plate (including a tempered glass plate such as an air-cooled tempered glass plate or a chemically tempered glass plate), a polyester resin plate such as a polyethylene terephthalate plate or a polybutylene terephthalate plate, a triacetyl cellulose plate, or the like. Cellulose resin plates, acrylic resin plates, or polycarbonate resin plates. Among them, the glass plate is preferably used for reasons such as sufficient rigidity, almost no deformation with respect to heat generated from the PDP, and excellent appearance such as texture. The thickness of the transparent substrate 51 is preferably 0.5 to 4 mm, and more preferably 0.7 to 3.2 mm. By setting the thickness of the transparent substrate 51 to 0.5 mm or more, the strength of the transparent substrate 51 can be ensured and damage in the manufacturing process can be suppressed. Moreover, strength is sufficient by setting the thickness of the transparent substrate 51 to about 4 mm, and an increase in weight can be suppressed by setting the thickness below this.

  The transparent substrate 51 is preferably provided with a concealing layer 55 such as a black frame concealing a component such as a connector disposed at the periphery of the image display area of the PDP body 2 on the periphery of the PDP body 2 side. The masking layer 55 is formed, for example, by printing a composition containing a low melting point glass and a pigment, or an ink containing a light shielding resin.

  The colored layer 52 contains a coloring pigment. The colored dye preferably contains at least one selected from a color tone correcting dye and a near-infrared absorbing dye. By providing such a colored layer 52 in the second filter portion 5, reflection on the optical filter 3 can be effectively suppressed. The colored layer 52 is, for example, a dispersion in which a coloring pigment is contained in an adhesive, and functions as a color tone correction layer and a near-infrared absorbing layer, and also functions as an adhesive layer. The antireflection film 43 described above is bonded to the transparent substrate 51 by such a colored layer 52.

  The color tone correction dye absorbs a part of a specific wavelength range of visible light and improves the color tone of transmitted visible light. 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 correction dyes, one having a good weather resistance and a good compatibility or dispersibility with an adhesive, for example, one selected from anthraquinone dyes, quinophthalone dyes, and tetraazaporphyrin dyes, Or it is preferable to use combining 2 or more types suitably. It is more preferable to use one or two or more selected from anthraquinone dyes and tetraazaporphyrin dyes in appropriate 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.

  Examples of 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, and indoles. Examples thereof include phenolic 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.

  0.1-20 mass parts is preferable with respect to 100 mass parts of adhesives, and, as for content of a coloring pigment | dye, 1.0-15 mass parts is more preferable. By setting the content of the coloring pigment to 0.1 part by mass or more, the effect of the coloring pigment can be sufficiently obtained. Moreover, durability of the colored layer 52 can be made high by content of a coloring pigment | dye being 20 mass parts or less.

  The colored layer 52 is usually prepared by dissolving a pressure-sensitive adhesive and at least one selected from a color tone-correcting dye and a near-infrared absorbing dye in an organic solvent to prepare a dye composition. The protective film 53 can be applied and dried to evaporate the organic solvent. In addition, a pigment | dye composition can contain a leveling agent, an antistatic agent, a heat stabilizer, antioxidant, a dispersing agent, a flame retardant, a lubricant, a plasticizer etc. as needed.

  Organic solvents include aromatics such as toluene and xylene, amides such as N-methyl-2-pyrrolidone, dimethylformamide, and dimethylacetamide, ketones such as methyl ethyl ketone, methyl isobutyl ketone, and acetone, methanol, ethanol, i- Examples thereof include alcohols such as propyl alcohol, hydrocarbons such as hexane, and tetrahydrofuran. These organic solvents may be used alone, or may be appropriately mixed and used as necessary.

  Examples of the coating method include dip coating, spray coating, spinner coating, bead coating, wire bar coating, blade coating, roller coating, curtain coating, slit die coater, gravure coater, Coating methods such as slit reverse coater method, micro gravure method and comma coater method can be adopted.

  The thickness of the colored layer 52 is preferably 0.3 to 50 μm, and more preferably 0.5 to 30 μm. By setting the thickness to 0.3 μm or more, a color tone correction effect, a near-infrared absorption effect, and the like can be sufficiently exhibited, and by setting the thickness to 50 μm or less, it is possible to reduce the residual organic solvent during molding.

  The PDP main body side antireflection film 53 and the visual recognition side antireflection film 54 can be the same as the antireflection film 43 in the first filter unit 4. The PDP main body side antireflection film 53 and the visual recognition side antireflection film 54 can be appropriately changed to an antiglare film and an antiglare film having an antireflection effect.

  The adhesive layer 44 can also be the same as the adhesive layer 44 in the first filter unit 4. In addition, about the adhesion layer 44, ie, the adhesion layer arrange | positioned at the visual recognition side in the 2nd filter part 5, it is preferable to contain a ultraviolet absorber. Examples of UV absorbers include benzotriazole UV absorbers, benzophenone UV absorbers, salicylate UV absorbers, cyanoacrylate UV absorbers, triazine UV absorbers, oxanilide UV absorbers, and nickel complex UV rays. Examples thereof include an absorbent and an inorganic ultraviolet absorber.

  Although content of a ultraviolet absorber changes also with kinds of ultraviolet absorber, 1-100 mass parts is preferable with respect to 100 mass parts of adhesives, and 2-50 mass parts is preferable. By setting it as 1 mass part or more, durability of the optical filter 3 can be improved, and the other physical property calculated | required by the optical filter 3 is securable by setting it as 100 mass parts or less.

  The second filter unit 5 is formed, for example, by forming a colored layer 52 on the transparent substrate 51 side of the PDP main body-side antireflection film 53 and bonding the transparent layer 51 to the transparent substrate 51 by using the colored layer 52, while preventing reflection on the viewing side. The adhesive layer 44 is formed on the transparent substrate 51 side of the film 54, and the adhesive layer 44 can be used to bond the transparent substrate 51 to the transparent substrate 51. In addition, the manufacturing method of the 2nd filter part 5 is not restricted to the said method.

  As described above, the PDP device 1 and the optical filter 3 have been described by way of example. However, the first filter unit 4 is preferably provided with both the electromagnetic wave shielding film 41 and the contrast improving film 42, but only one of them is provided. One may be provided in the first filter unit 4 and the other may be provided in the second filter unit 5 when a predetermined haze value relationship is satisfied. Moreover, the positional relationship between the electromagnetic wave shielding film 41 and the contrast improving film 42 can be changed as appropriate.

  The antireflection layer is preferably provided on all the main surfaces on the viewing side of the first filter unit 4 and the main surfaces on both sides of the second filter unit 5, but is not necessarily provided on all the main surfaces. , It may not be provided on all main surfaces. The antiglare layer is preferably provided on at least one main surface selected from the main surface on the viewing side of the first filter unit 4 and the main surface on both sides of the second filter unit 5, but it is not necessarily provided. Absent. Further, the first filter unit 4 and the second filter unit 5 may be appropriately provided with other layers, for example, a hard coat layer, as necessary and within the scope of the object of the present invention. .

Hereinafter, the present invention will be specifically described with reference to examples.
In addition, this invention is not limited by these Examples.

  First, pressure-sensitive adhesive films A to H used for manufacturing an optical filter were prepared.

<Adhesive film A>
Prepare a roll of an antireflection film (trade name “Realak 1700” manufactured by NOF Corporation), and make the transmittance at 380 nm 7% or less on the surface opposite to the surface on which the antireflection layer is formed. A pressure-sensitive adhesive film A was obtained by laminating a transparent acrylic resin pressure-sensitive adhesive (thickness 25 μm) mixed with an ultraviolet absorber.

<Adhesive film B>
Prepare a roll of an antireflection film (trade name “Realak 1700”, manufactured by NOF Corporation), and color coloring for PDP color tone correction and near infrared absorption on the surface opposite to the surface on which the antireflection layer is formed A laminated acrylic resin adhesive (thickness 25 μm) was laminated to obtain an adhesive film B.

  The coloring dyes include neon cut dyes (dyes having an absorption maximum near a wavelength of 590 nm) (manufactured by Yamada Chemical Co., Ltd., trade name “TAP2”) and color correction dyes (manufactured by Nippon Kayaku Co., Ltd., trade name “KAYASORB VIOLET A-”). R ”,“ KAYASORB GREEN A-B ”) and near-infrared absorbing dyes (trade names“ IR-14 ”,“ IR-20 ”,“ IR-915 ”, manufactured by Nippon Shokubai Co., Ltd.), etc. The decorative optical filter (second filter portion) was adjusted so that the luminous transmittance was 50% and the near infrared transmittance (850 nm to 950 nm) was 20% or less.

<Adhesive film C>
Prepare a roll of anti-glare film (trade name “Realak 7300” manufactured by NOF Corporation) in which an anti-glare layer consisting of irregularities is formed on the surface of the transparent substrate and an anti-reflection layer is formed on the anti-glare layer Then, on the surface opposite to the surface on which the antiglare layer or the antireflection layer is formed, an acrylic resin pressure-sensitive adhesive (thickness 25 μm) containing the same coloring pigment as the pressure-sensitive adhesive film B is laminated to obtain a pressure-sensitive adhesive film C. It was.

<Adhesive film D>
Prepare a roll of an antireflection film (trade name “Realak 1700”, manufactured by NOF Corporation), and apply a transparent acrylic resin adhesive (thickness 25 μm) on the surface opposite to the surface on which the antireflection layer is formed. By laminating, an adhesive film D was obtained.

<Adhesive film E>
A roll of an antiglare film (trade name “Realak 7300” manufactured by NOF Corporation) is prepared, and a transparent acrylic resin pressure-sensitive adhesive (thickness) is provided on the surface opposite to the surface on which the antiglare layer composed of uneven portions is formed. 25 μm) was laminated to obtain an adhesive film E.

<Adhesive film F>
Prepare a roll of anti-glare film (trade name “Realak TX090”, manufactured by NOF Corporation) in which an anti-glare layer consisting of irregularities is formed on the surface of the transparent substrate and an anti-reflection layer is formed on this anti-glare layer Then, a transparent acrylic resin adhesive (thickness 25 μm) was laminated on the surface opposite to the surface on which the antiglare layer or the antireflection layer was formed, and an adhesive film F was obtained.

<Adhesive film G>
Prepare a roll of an antireflection film (trade name “Realak 1700”, manufactured by NOF Corporation), and color coloring for PDP color tone correction and near infrared absorption on the surface opposite to the surface on which the antireflection layer is formed A pressure-sensitive adhesive film G was obtained by laminating an acrylic resin-containing pressure-sensitive adhesive containing an ultraviolet absorber (thickness: 25 μm).

  The coloring dyes include neon cut dyes (dyes having an absorption maximum near a wavelength of 590 nm) (manufactured by Yamada Chemical Co., Ltd., trade name “TAP2”) and color correction dyes (manufactured by Nippon Kayaku Co., Ltd., trade name “Kayaset VIOLET A-”). R ”,“ Kayset GREEN A-B ”) and near-infrared absorbing dyes (trade names“ e-ex color IR-14 ”,“ e-ex color IR-20 ”,“ e-ex color IR-915 ”manufactured by Nippon Shokubai Co., Ltd.) ) And the like, the luminous transmittance of the decorative optical filter (second filter portion) described later is 50%, the near infrared transmittance (850 nm to 950 nm) is 20% or less, and the transmittance at 380 nm is 7%. Adjustments were made to be as follows.

  Next, the glass substrate with a black frame of the optical filter for decoration (2nd filter part) was produced. The glass substrate with a black frame corresponds to a transparent substrate having a concealing layer in the second filter portion.

<Glass substrate with black frame>
A glass substrate (shape: rectangle, dimensions: 607 mm × 1012 mm, thickness 2.5 mm) having a chamfered shape for a 42-inch vertical and horizontal dimension was prepared. A black frame (width: 40 mm) was printed on the entire periphery of the peripheral edge of the glass substrate on the surface of the glass substrate on the PDP main body side by a screen printing method to obtain a glass substrate with a black frame. As the black ink, a glass paste (Asahi Glass, “TP24K”) was used. Further, logo characters were printed on one side of the long sides of the black frame so that the characters could be viewed from the direction opposite to the printed surface.

  Next, an optical filter for attaching to the PDP main body (main body optical filter; first filter portion) and a decorative optical filter (second filter portion) were produced.

Example 1
An adhesive film A (shape: rectangular, dimensions: 605 mm × 1010 mm) and an adhesive film B (shape: rectangular, dimensions: 535 mm × 938 mm) were laminated on a glass substrate with a black frame to obtain a decorative optical filter. In order to prevent the logo characters from being colored by the adhesive film B when viewed from the viewing side, the adhesive film A was laminated on the viewing side and the adhesive film B was laminated on the PDP main body side. The pressure-sensitive adhesive film A was laminated so as to cover the entire surface of the glass substrate so that the pressure-sensitive adhesive film B overlapped the black frame by 4 mm.

  Electromagnetic wave shielding etching mesh film having a transparent adhesive layer (made by Toppan Printing Co., Ltd., trade name “TPJ39A2-E4211”, shape: rectangular, dimensions: 547 mm × 951 mm) and a contrast improving film having a transparent adhesive layer (Dainippon) The product name “CRF A0P51T48-4201” manufactured by Printing Co., Ltd., shape: rectangular, dimensions: 532 mm × 937 mm), and adhesive film E (shape: rectangular, dimensions: 530 mm × 935 mm) were bonded in this order, and then the temperature was 60. An autoclave treatment was performed at 0 ° C. and a pressure of 0.95 MPa to obtain a main body optical filter. By making the size of the etching mesh film larger than the size of the contrast improving film and the pressure-sensitive adhesive film E, the etching mesh film was exposed in the periphery of the filter to form a grounding portion.

(Example 2)
A decorative optical filter and a main body optical filter were produced in the same manner as in Example 1 except that the adhesive film E was changed to an adhesive film F (shape: rectangular, size: 530 mm × 935 mm).

(Example 3)
Except that the adhesive film B was changed to an adhesive film C (shape: rectangular, dimensions: 535 mm × 938 mm) and the adhesive film E was changed to an adhesive film D (shape: rectangular, dimensions: 530 mm × 935 mm), the same process as in Example 1 was performed. A decorative optical filter and a main body optical filter were produced.

(Comparative Example 1)
An adhesive film A (shape: rectangular, size: 605 mm × 1010 mm) was laminated on the viewing side of the glass substrate with a black frame. Further, a contrast improving film having a transparent adhesive layer on the PDP body side of the glass substrate with a black frame (Dai Nippon Printing Co., Ltd., trade name “CRF A0P51T48-4201”, shape: rectangular, dimensions: 545 mm × 948 mm), transparent adhesive Electromagnetic wave shielding etching mesh film having a layer (manufactured by Toppan Printing Co., Ltd., trade name “TPJ39A2-E4211”, shape: rectangular, dimension: 545 mm × 948 mm), adhesive film C (shape: rectangular, dimension: 532 mm × 935 mm) in this order After bonding, autoclave treatment was performed at a temperature of 60 ° C. and a pressure of 0.95 MPa to obtain a single optical filter as a front plate disposed on the front surface of the PDP main body. By making the size of the adhesive film C smaller than the size of the etching mesh film, the etching mesh film was exposed in the periphery of the filter to form a grounding portion.

(Comparative Example 2)
Contrast improving film (produced by Dainippon Printing Co., Ltd., product) having a transparent adhesive layer on an electromagnetic shielding etching mesh film (made by Toppan Printing Co., Ltd., trade name “TPJ39A2-E4211”, shape: rectangular, size: 547 mm × 951 mm) The name “CRF A0P51T48-4201”, shape: rectangular, dimension: 532 mm × 937 mm), and adhesive film G (shape: rectangular, dimension: 530 mm × 935 mm) were bonded together in this order, and then a temperature of 60 ° C. and a pressure of 0. The autoclave process was performed at 95 MPa, and the single optical filter laminated | stacked on a PDP main body was obtained.

(Comparative Example 3)
Except that the adhesive film B was changed to an adhesive film D (shape: rectangular, dimensions: 535 mm × 938 mm) and the adhesive film E was changed to an adhesive film C (shape: rectangular, dimensions: 530 mm × 935 mm), the same as in Example 1. A decorative optical filter and a main body optical filter were produced.

(Comparative Example 4)
Adhesive film A (shape: rectangular, dimension: 605 mm × 1010 mm) was laminated on the viewing side of the glass substrate with a black frame to obtain a decorative optical filter. Moreover, the optical filter for main bodies was produced similarly to Example 1 except having changed the adhesive film E into the adhesive film C (a shape: a rectangle, a dimension: 530 mm x 935 mm).

  Next, the decorative optical filter and the main body optical filter of Examples and Comparative Examples were evaluated by the following procedure.

(Haze)
The haze was measured with a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., NDH5000W) based on JIS K7150. The measurement was performed individually for the decorative optical filter and the main body optical filter.

(Luminous reflectance)
The luminous transmittance was measured based on JIS Z8701 with a spectrophotometer (manufactured by Shimadzu Corporation, product name: Solid Spec 3700) using a C light source. The measurement was performed in a state where the decorative optical filter and the main body optical filter were overlapped.

(Visibility transmittance)
The luminous transmittance was measured based on JIS Z8701 with a spectrophotometer (manufactured by Shimadzu Corporation, product name: Solid Spec 3700) using a C light source. The measurement was performed individually for the decorative optical filter and the main body optical filter.

(Image quality, reflection)
Evaluation of image quality and reflection was made by removing the optical filter installed on the front surface of the PDP main body from the 42-inch plasma television (manufactured by Panasonic, TH-42PZ800), and then mounting the optical filter for the main body on the surface of the PDP main body. The decorative optical filter was set on it, and it was visually observed.

  Regarding the image quality, when a white and black image is displayed at the same time in a dark environment where external light is blocked and the boundary between white and black looks clear, “○”, and when it looks slightly unclear, “△” The case where the image was unclear was evaluated as “x”. In addition, evaluation was performed about the case where the gap (space | interval) of the optical filter for decoration and the optical filter for main bodies was set to 0 mm, and 7 mm.

  For reflections, in a bright place environment (F10 light source, 150 lx manufactured by Topcon Corp., measured with illuminometer IM-5M), the reflected image is confirmed by visual observation, and it is difficult to visually recognize the reflected image. The case where it was easy to visually recognize was evaluated as “Δ”, and the case where it was easy to visually recognize was evaluated as “x”.

  The results are shown in Table 1. In the table, “AR” has an antireflection layer, “AG” has an antiglare layer, “UV” contains an ultraviolet absorber, “colored” contains a coloring pigment, “Transparent” indicates that no coloring pigment is contained.

  As can be seen from Table 1, according to the optical filters of Examples 1 to 3, the decoration of black frames and the like can be performed, so that the design is excellent and the image quality of the display image can be improved. Reflection can also be suppressed. On the other hand, according to the optical filter of the comparative example 1, although it can decorate since it has a front plate, since all the functional layers are provided in a front plate, the image quality of a display image falls. According to the optical filter of Comparative Example 2, it cannot be decorated because it does not have a front plate. According to the optical filter of Comparative Example 3, the basic configuration is the same as that of Example 1, but since the position of the colored layer is different, the reflection cannot be sufficiently suppressed. According to the optical filter of Comparative Example 4, since there are few antireflection layers compared with the optical filter of Comparative Example 3, reflection is more likely to occur than in Comparative Example 3.

  DESCRIPTION OF SYMBOLS 1 ... PDP apparatus, 2 ... PDP main body, 3 ... Optical filter, 4 ... 1st filter part, 5 ... 2nd filter part, 41 ... Electromagnetic wave shielding film, 42 ... Contrast improvement film, 43 ... Antireflection film, 44 ... adhesive layer, 51 ... transparent substrate, 52 ... colored layer, 53 ... PDP main body side antireflection film, 54 ... view side antireflection film

Claims (7)

A first filter unit stacked on the plasma display panel body; and a second filter unit provided separately from the first filter unit and disposed on the viewing side of the first filter unit. An optical filter,
The first filter portion has at least one functional layer other than the colored layer,
The second filter unit includes a transparent substrate and a colored layer laminated on the plasma display panel main body side of the transparent substrate, and the haze value of the first filter unit is the second filter unit. An optical filter characterized by being larger than the haze value.   The optical filter according to claim 1, wherein the colored layer has a pressure-sensitive adhesive and a coloring pigment contained in the pressure-sensitive adhesive.   The optical filter according to claim 2, wherein the colored dye has at least one selected from a near-infrared absorbing dye and a color tone correcting dye.   4. The optical filter according to claim 1, wherein the functional layer other than the colored layer has at least one selected from an electromagnetic wave shielding layer and a contrast improving layer. 5.   At least one main surface selected from the main surface of the first filter portion and the main surface of the second filter portion has at least one selected from an antireflection layer, an antiglare layer, and a hard coat layer. The optical filter according to any one of claims 1 to 4, wherein:   The optical filter according to any one of claims 1 to 5, wherein the luminous transmittance of the first filter section is larger than the luminous transmittance of the second filter section. A plasma display panel device having a plasma display panel body and an optical filter provided in the plasma display panel body,
The plasma display panel device according to claim 1, wherein the optical filter is the optical filter according to claim 1.

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