JP2008197539A - Method of manufacturing optical filter for display, optical filter for display and display and plasm display panel provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of efficiently manufacturing a proper optical filter with a grounding electrode which have superior productivity and the optical filter. <P>SOLUTION: The method of manufacturing the optical filter for a display which has a conductive layer as an electrode part includes a step for exposing a metallic conductive layer, by irradiating the side end part or the side end vicinity part of a first functional layer of a long laminate containing a long transparent film; the metal conductive layer formed on the whole surface and the first functional layer formed over the entire surface of the metallic conductive layer with laser, when traveling the long laminate to remove the irradiated part of the first functional layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is applicable to various displays such as a plasma display panel (PDP), a cathode ray tube (CRT) display, a liquid crystal display, an organic EL (electroluminescent) display, and a field emission display (FED) including a surface electric field display (SED). The present invention relates to an optical filter having various functions such as antireflection, near-infrared shielding, electromagnetic wave shielding, and the like, and a display provided with this optical filter, particularly a PDP.

  In the case of flat panel displays such as liquid crystal displays, plasma displays (PDP), EL displays, and CRT displays, it has been known that the light from the outside is reflected on the surface and the internal visual information is difficult to see. Various measures have been taken, such as the installation of an optical film including an antireflection film.

  In recent years, large-screen displays have become mainstream in displays, and PDPs have become common as next-generation large-screen display devices. However, in this PDP, high-frequency pulse discharge is performed on the light emitting unit for image display, which may cause unnecessary electromagnetic radiation and infrared radiation that may cause malfunction of the infrared remote controller. Thus, various antireflection films for PDP (electromagnetic wave shielding light transmitting window material) having conductivity have been proposed. As the conductive layer of this electromagnetic wave shielding light transmitting window material, for example, (1) a transparent film provided with a transparent conductive thin film containing metallic silver, and (2) a conductive mesh made of a metal wire or conductive fiber in a net shape are provided. Transparent film, (3) a layer of copper foil or the like on the transparent film is etched into a net-like shape, an opening is provided, and (4) a conductive ink is printed on the transparent film in a mesh shape, etc. Are known.

  Furthermore, in a large display such as a conventional PDP, various films such as an antireflection film and a near infrared cut film are bonded together. For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 11-74683) discloses an electromagnetic wave shielding light transmitting window material in which a conductive mesh is interposed between two transparent substrates and bonded and integrated with a transparent adhesive resin. Are listed.

  In the electromagnetic wave shielding light transmitting window material, it is necessary to ground (ground) a conductive layer (electromagnetic wave shielding material), for example, a conductive mesh, in order to improve the electromagnetic wave shielding property by the conductive layer. There is. For this purpose, an electromagnetic wave shielding material protrudes from between two transparent substrates and is grounded by wrapping around the back side of the light transmitting window material laminate, or is in contact with the electromagnetic wave shielding material between two transparent substrates. Thus, it is necessary to sandwich the conductive adhesive tape. However, in such a method, there is a problem that the above work in the stacking process is complicated.

  Patent Document 2 (Japanese Patent Laid-Open No. 2001-142406) discloses a laminate in which a single transparent substrate, an electromagnetic wave shielding material, an outermost antireflection film, and a near infrared cut film are laminated and integrated. A conductive adhesive tape is attached across the edge and front and back edges of the transparent substrate, and the conductive adhesive tape and the edge of the electromagnetic shielding material are attached by a conductive adhesive. An electromagnetic shielding light transmissive laminated film is described.

Japanese Patent Laid-Open No. 11-74683 JP 2001-142406 A

  For example, when manufacturing an optical filter for a display such as the above-mentioned PDP using a long plastic film, first, a near-infrared cut film and an antireflection film are produced, and these are laminated via a conductive mesh for electromagnetic wave shielding. Thus, a long optical filter is obtained, and then cut into a rectangular shape in accordance with the shape of the display portion on the entire surface of each display. For this reason, such a long optical filter is usually cut in the width direction, and the end faces of all layers are exposed on the cut surface in the width direction, that is, the end faces (side faces). There is only a very small area. The conductive mesh also has only a slight peek at the mesh-like cross section.

  Using such an optical filter for display as it is, it is difficult to ground (ground) using an exposed conductive layer (for example, a conductive mesh) in order to improve electromagnetic wave shielding by the conductive layer. .

  In the optical filter as described in Patent Document 2, there is a problem that it is necessary to bond each layer constituting the filter so that the conductive mesh protrudes from the end face.

  Accordingly, the present invention provides a method of manufacturing an optical filter for a display that can be easily manufactured, has a good electromagnetic shielding property, and has an earth electrode that can be easily attached to the display and grounded. With the goal.

  The present invention also provides a method of manufacturing an optical filter for a display that can be easily manufactured and has a ground electrode that is light and thin, has good electromagnetic shielding properties, and is easy to attach to the display and to be grounded. The purpose is to provide.

  Furthermore, an object of the present invention is to provide an optical filter for a display which has an earth electrode which can be easily manufactured and has a good electromagnetic wave shielding property and which can be easily attached to the display and is easily grounded. .

  The present invention also provides an optical filter for a display which can be easily manufactured, has a grounding electrode which is light and thin, has a good electromagnetic wave shielding property, and is easy to attach to the display and to be easily grounded. With the goal.

  Furthermore, the present invention provides an optical filter suitable for a PDP that can be easily manufactured, has a good electromagnetic shielding property, and has a ground electrode that can be easily mounted on a display and is easily grounded. Objective.

  Another object of the present invention is to provide a display in which the optical filter having the above excellent characteristics is bonded to the surface of an image display glass plate.

  Furthermore, an object of the present invention is to provide a PDP in which the optical filter having the excellent characteristics is bonded to the surface of an image display glass plate.

Therefore, the present invention
The first functional layer side of a long laminate including a long transparent film, a metal conductive layer formed on the entire surface thereof, and a first functional layer formed on the entire surface of the metal conductive layer. An electrode part including a step of irradiating a laser to the end part or the vicinity of the side end to remove the first functional layer of the irradiated part and exposing the metal conductive layer while the elongated laminate is running Manufacturing method of optical filter for display which has conductive layer as. ;
It is in.

The suitable aspect of the manufacturing method of the optical filter for displays of this invention is as follows.
(1) Laser irradiation is performed on the side end portions on both sides of the first functional layer or in the vicinity of the side ends.
(2) Laser irradiation is performed simultaneously on both side edge portions or side edge vicinity portions of the first functional layer. Laser irradiation may be performed on one side end portion or a side end vicinity portion of the first functional layer and then on the other side end portion or the side end vicinity portion.
(3) Laser irradiation to the first functional layer of the long laminate is performed so as to draw a rectangle. At that time, the long laminate may be cut into a rectangular laminate having a predetermined size.
(4) Before or after the above step (edge laser irradiation), the first functional layer of the elongated laminate with the metal conductive layer exposed is irradiated with a laser in the width direction, so that 1 functional layer is removed to expose the metal conductive layer. By continuously performing this, when the side end portions on both sides or the vicinity of the side ends are irradiated with laser, the one in which the metal conductive layer is exposed on the entire periphery can be obtained.
(5) After the above step (edge laser irradiation), the first functional layer of the elongated laminate with the metal conductive layer exposed is irradiated with a laser in the width direction, whereby the first function of the irradiated portion The conductive layer is removed to expose the metal conductive layer and cut. By performing this continuously, a rectangular optical filter for display can be obtained. When laser irradiation is performed on the side end portions on both sides or in the vicinity of the side ends, the one with the metal conductive layer exposed on the entire periphery is obtained.
(6) Laser irradiation is performed continuously or intermittently. Laser irradiation is generally performed intermittently, but the exposed metal conductive layer obtained is preferably continuous.
(7) The second functional layer is provided on the side of the transparent film where the metal conductive layer is not provided.
(8) The exposed metal conductive layer is a continuous band-shaped region or an intermittent band-shaped region formed of an island-shaped conductive layer interrupted by the first functional layer in the middle.
(9) The metal conductive layer is a mesh metal conductive layer.
(10) The second functional layer is provided on the side of the transparent film where the metal conductive layer is not provided.
(11) The metal conductive layer is a mesh metal conductive layer.
(12) The first functional layer is a hard coat layer.
(13) The first functional layer includes a hard coat layer and a low refractive index layer having a refractive index lower than that of the hard coat layer, and the hard coat layer is in contact with the metal conductive layer. Good antireflection properties can be obtained.
(14) The first functional layer includes a hard coat layer, a high refractive index layer having a higher refractive index than the hard coat layer, and a low refractive index layer having a lower refractive index than the hard coat layer, and the hard coat layer is a metal conductive layer. Is in contact with. Furthermore, good antireflection properties can be obtained.
(15) The first functional layer is an antiglare layer. The antiglare layer is a so-called antiglare layer, generally has an excellent antireflection effect, and it is often unnecessary to provide the antireflection layers (12) to (14). As a result, the degree of freedom of the refractive index of the other layers is improved, and the choice of material for the layers is expanded.
(16) The first functional layer includes an antiglare layer and a low refractive index layer having a lower refractive index than the antiglare layer, and the antiglare layer is in contact with the metal conductive layer. Thereby, the antireflection effect further superior to that of the antiglare layer alone can be obtained.
(17) The second functional layer is at least one layer selected from a near-infrared absorbing layer, a neon cut layer, and a transparent adhesive layer. A 2nd functional layer consists of a transparent adhesive layer which has a near-infrared absorption function and a neon cut function, or a near-infrared absorption layer which has a neon cut function, and a transparent adhesive layer (in this order on a transparent film) Or a near-infrared absorbing layer, a neon cut layer, and a transparent pressure-sensitive adhesive layer (provided on the transparent film in this order).
(18) The transparent film is a plastic film.
(19) A release sheet is provided on the transparent adhesive layer. A release sheet is provided on the transparent adhesive layer. Mounting on the display becomes easy.
(20) The obtained display optical filter is a display optical filter attached to a glass substrate.
(21) The obtained display optical filter is a plasma display panel filter.

The present invention also provides
A long laminate including a long transparent film, a metal conductive layer formed on the entire surface thereof, and a first functional layer formed on the entire surface of the metal conductive layer is moved on the surface of the glass substrate. Attached to the glass substrate and cut into the same shape as the glass substrate, and then irradiated the laser to the side end portion or the side end vicinity portion of the first functional layer of the elongated laminate on the surface of the glass substrate. A method for producing an optical filter for a display having a conductive layer as an electrode part, comprising the step of removing the first functional layer and exposing the metal conductive layer;
There is also.

  The preferred embodiments (1) to (3) and (5) to (20) of the first production method can also be applied to the production method.

Furthermore, the present invention provides:
A display comprising an optical filter for display obtained by the above manufacturing method (generally an optical filter is bonded to the surface of an image display glass plate); and an optical filter for display (generally an optical filter) Is also bonded to the surface of the image display glass plate).

  The optical filter for display is preferably bonded to the image display glass plate by adhesion between the surface on which the conductive layer is not provided and the surface of the image display glass plate.

  By the method for manufacturing an optical filter for display according to the present invention, an optical filter having an electrode portion (ground electrode) made of a metal conductive layer around it can be manufactured very easily. That is, the side end portion of the functional layer of the long laminate in which the first functional layer such as the hard coat layer is formed on the entire surface of the metal conductive layer formed on the entire surface of the long transparent film or In the vicinity of the side end, the functional layer of the irradiated portion is removed by laser irradiation while the laminate is running to expose the metal conductive layer, and appropriately cut continuously, etc. The optical filter which has an electrode part (earth electrode) which becomes can be manufactured. By this method, an electrode portion (ground electrode) made of a conductive layer provided around can be manufactured very easily. Such an electrode portion can be easily grounded.

  The optical filter for display according to the present invention is an optical filter with a conductive layer electrode portion having a specific configuration, which is advantageously obtained by using the above-described manufacturing method. There are advantages to being able to.

  In particular, since the optical filter can be obtained using a single transparent film, the thickness of the optical filter becomes extremely small and the mass is reduced accordingly. Very advantageous.

  Therefore, the optical filter for display of the present invention includes a field emission display (FED) including a plasma display panel (PDP), a cathode ray tube (CRT) display, a liquid crystal display, an organic EL (electroluminescence) display, and a surface electric field display (SED). It can be said that the optical filter has various functions such as anti-reflection, near-infrared shielding, and electromagnetic wave shielding for various displays such as).

  The manufacturing method of the optical filter for displays with an electrode part (earth electrode) of the present invention and the optical filter for displays with an electrode part of the present invention will be described in detail below.

  FIG. 1 is a schematic cross-sectional view for explaining an example of a method for producing an optical filter for a display with an electrode according to the present invention.

  A mesh-shaped metal conductive layer 13 is formed over the entire surface of the long transparent film 12 (1), and then the synthetic resin serving as the first functional layer is formed over the entire area of the mesh-shaped metal conductive layer 13. A hard coat layer 16 is formed (2). The long laminate thus obtained is wound into a roll, for example, in a roll-to-roll manner, the long laminate is continuously fed from this roll, and the hard coat layer 16 side The end is irradiated with a laser (3). Irradiation may be performed simultaneously on both side edges, or after one is performed, the other side edge may be irradiated. Here, laser irradiation is performed so as not to irradiate the outermost portion (edge). In general, laser irradiation is performed with the laser head fixed to (both) ends while the laminate is running. Since the hard coat layer 16 is a layer made of a synthetic resin, the hard coat layer 16 in the region irradiated with the laser decomposes or burns and disappears. Thereby, the hard coat layer 16 in the vicinity of both end portions is removed, the metal conductive layer is exposed, and a conductive layer exposed region 13 'is formed, which forms an electrode portion (4). At this time, normally, the hard coat layer that has not been irradiated with the laser is left on the edge of the transparent film 12 to form the edge hard coat layer 16 ′. Thereafter, by cutting in the width direction using a laser, a rectangular optical filter having a conductive layer exposed region 13 ′ (electrode portion) around it is obtained. This cutting may be performed by a cutting machine or the like. A plan view of such an optical filter is shown in FIG. In the method of FIG. 1, a transparent film having a size capable of obtaining one optical filter in the width direction is generally used. Using a transparent film, install two lasers at the center, etc. so that the laser is irradiated not only at both ends but also at the center in parallel with the ends so that two optical filters can be obtained in the width direction. May be.

  In the laser irradiation step (3), the laser may be irradiated in a rectangular shape. That is, laser irradiation may be performed around a rectangle. At that time, not only the hard coat layer 16 but also the laser beam may be irradiated so as to cut the laminated body into a rectangular shape. A plan view of the optical filter thus cut is shown in FIG.

  Alternatively, before or after the above step (end laser irradiation), or after the above step, the hard coat layer 16 of the long laminate with the metal conductive layer exposed is irradiated with a laser in the width direction, whereby the hard coat of the irradiated portion The layer 16 may be removed to expose the metal conductive layer in the width direction. By performing this continuously, when the laser irradiation is performed on the vicinity of the side edges on both sides, a metal conductive layer exposed on the entire periphery can be obtained (see FIG. 4). Laser irradiation in the width direction is generally performed by stopping the travel of the filter and moving it in the width direction.

  Alternatively, in the laser irradiation step (3), the long laminate is fixed to the surface of the rectangular glass substrate (for example, using the transparent adhesive layer 15 described below), and the edge of the glass substrate (In this case, a laser may be used), and a conductive layer is formed by irradiating the vicinity of both ends or the periphery of the rectangular laminate attached to the glass substrate with a laser. By exposing, a rectangular optical filter having a conductive layer exposed region (electrode portion) in the vicinity of both end portions or the peripheral end portion can be obtained. A plan view of such an optical filter is shown in FIG. 4 in the case of a frame-shaped electrode portion having an electrode portion in the periphery (the hard coating layer remains at the outermost portion). By adopting this method, since the long laminate is fixed on the glass substrate, there is no occurrence of misalignment of the laminate or floating of the laminate. It is possible to obtain an optical filter having an excellent appearance.

  A near-infrared absorbing layer 14 as a second functional layer and a transparent adhesive layer 15 may be formed on the back side (usually the entire surface) of the long transparent film 12, and in this case, FIG. As shown in FIG. 1, an optical filter which is one of the preferred embodiments of the present invention is obtained. The transparent adhesive layer 15 may not be provided. Various conductive materials for grounding are connected to the electrode portion (conductive layer exposed region 13 ′) of the obtained optical filter. In addition, the said hard-coat layer is shown as 1 type of the 1st functional layer of this invention.

  Or after forming the said electrode part, the near-infrared absorption layer 14 as a 2nd functional layer and the transparent adhesive layer 15 may be formed on it on the back side (usually whole surface) of the transparent film 12. The transparent adhesive layer 15 may not be provided.

  The first or second functional layer may be any layer as long as it includes a synthetic resin exhibiting some function. In the present invention, generally, the first functional layer is a hard coat layer; it is composed of a hard coat layer and a low refractive index layer having a lower refractive index than the hard coat layer (in this case, the hard coat layer is a metal conductive layer). Or a high refractive index layer having a higher refractive index than the hard coat layer and a low refractive index layer having a lower refractive index than the hard coat layer (in this case, the hard coat layer is a metal conductive layer). Touching). The more layers, the better antireflection properties are obtained. Or it is also preferable that a 1st functional layer consists of a low-refractive-index layer whose refractive index is lower than an anti-glare layer or an anti-glare layer, and an anti-glare layer (an anti-glare layer is in contact with a metal conductive layer). The antiglare layer is a so-called antiglare layer, generally has an excellent antireflection effect, and it is often unnecessary to provide the antireflection layers (6) to (8). As a result, the degree of freedom of the refractive index of the other layers is improved, and the choice of material for the layers is expanded. When it consists of a glare-proof layer and a low-refractive-index layer, the more superior antireflection effect than the glare-proof layer is acquired. The second functional layer is generally a near-infrared absorbing layer, a neon cut layer, a transparent adhesive layer, or a combination of two or more of these layers. In this invention, a 2nd functional layer consists of a transparent adhesive layer which has a near-infrared absorption function and a neon cut function, or a near-infrared absorption layer which has a neon cut function, and a transparent adhesive layer (in this order) It is preferable that it consists of a near-infrared absorption layer, a neon cut layer, and a transparent adhesive layer (provided on the transparent film in this order).

  In the case of laser irradiation, a single laser may be used for irradiation in a rectangular shape, a plurality of lasers may be used for simultaneous irradiation at both ends, irradiation may be performed for each end, or other appropriate irradiation methods may be changed. May be.

  In the preferred optical filter of the present invention shown in FIG. 2, in which a frame-like conductive layer exposed region 13 ′ is formed on the entire periphery of the hard coat layer 16 and a frame-like edge hard coat layer 16 ′ is formed outside thereof, The layer exposed region 13 ′ is used as an electrode portion for grounding. The width (L in FIG. 2) of the thin band-like region at both edges is generally 1 to 100 mm, particularly preferably 2 to 50 mm. Further, the width of the thin band-like region of the edge hard coat layer 16 'is generally 0.1 to 20 mm, and particularly preferably 0.5 to 5 mm.

  The conductive layer exposed region 13 ′ is a band-shaped region, but in the present invention, it is sufficient that an exposed conductive layer capable of forming an electrode portion is present at the edge, so the conductive layer exposed region (generally the side end) An intermittent band-like region in which intermittent island-like regions exist continuously may be used. In this case, the laser may be irradiated intermittently rather than continuously (strictly, finely and intermittently). The island region may have any shape such as a rectangle, an ellipse, a circle, and a polygon. The island regions may all be the same size, but may be different from each other.

  On the hard coat layer 16, it is preferable to provide a low refractive index layer or the like having a lower refractive index than that of the hard coat layer 16 in order to improve antireflection properties. In that case, in general, the hard coat layer 16 is formed on the entire surface of the hard coat layer. . When a hard coat layer and a low refractive index layer are provided, coating and (light) curing may be performed separately. However, after the hard coat layer and the low refractive index layer are applied, ) It may be cured. Further, although the hard coat layer 16 is formed on the metal conductive layer, it is also preferable to provide an antiglare layer and, if necessary, a low refractive index layer according to the desired design of the optical filter. The antiglare layer is preferably a hard coat layer having an antiglare function.

  FIG. 6 shows an example of a schematic cross-sectional view of an optical filter in which the low refractive index layer (antireflection layer) is further provided on the hard coat layer in the display optical filter of the present invention shown in FIG. . In FIG. 6, a mesh-like metal conductive layer 23, a hard coat layer 26, and a low refractive index layer 27 are provided in this order on one surface of the transparent film 22, and the near-infrared absorbing layer 24 and its layer are provided on the other surface. A transparent adhesive layer 25 is provided on the top. In this case, laser irradiation is performed in the vicinity of the surface end portion of the low refractive index layer 27. Similarly to FIG. 5, the hard coat layer 26 has an edge hard coat layer 26 ′ on the outer side through the conductive layer exposed region 23 ′ in the edge (endmost) region, and the low refractive index layer 27. In the edge region, the edge low refractive index layer 27 ′ is provided on the edge hard coat layer 26 ′ on the outer side through the conductive layer exposed region 23 ′. The layer (eg, high refractive index layer) provided on the hard coat layer 26 (26 ′) is provided at the center and the edge similarly to the low refractive index layer 27. Further, the mesh gaps of the mesh-like metal layer 24 are filled with the hard coat layer 26, thereby improving the transparency. As described above, it is also preferable to provide an antiglare layer instead of the hard coat layer 26.

  In the above configuration, the positions of the hard coat layer 26, the low refractive index layer (such as an antireflection layer) 27, and the near-infrared absorbing layer 24 may be interchanged, and the near-infrared absorbing layer 24 is made of metal. It may be provided between the conductive layer 23 and the hard coat layer 26. However, the configuration of FIG. 6 is advantageous in that the grounding can be easily installed because the conductive layer is present on the front surface (front side) of the display when the display is mounted.

  In FIG. 1 described above, the conductive layer exposed region is the side end region, but the aspect in which the edge hard coat layer or the like is provided on the outer side has been described. The present invention also includes a mode in which such a hard coat layer or the like is not present at the edge, that is, a conductive layer exposed region is provided at the end. Such an embodiment will be described with reference to FIG.

  FIG. 7 is a schematic cross-sectional view for explaining an example of the method for producing the optical filter for a display with an electrode portion according to the present invention.

  A mesh-like metal conductive layer 33 is formed on the entire surface of the long transparent film 32 (1), and then the synthetic resin as the first functional layer is formed on the entire area of the mesh-like metal conductive layer 33. A hard coat layer 36 is formed (2). The long laminate thus obtained is wound into a roll, for example, in a roll-to-roll manner, the long laminate is continuously fed from this roll, and the hard coat layer 36 side The end is irradiated with a laser (3). Irradiation may be performed simultaneously on both side edges, or after one is performed, the other side edge may be irradiated. In this case, laser irradiation is performed so as to irradiate the outermost portion (edge). Since the hard coat layer 36 is a layer made of a synthetic resin, the hard coat layer 36 in the region irradiated with the laser is decomposed or burned and disappears. As a result, the hard coat layer 36 at the four side edges is removed, the metal conductive layer is exposed, and a conductive layer exposed region 33 'is formed, which forms an electrode portion (4). In this way, when irradiating the laser so that the outermost hard coat layer or the like does not remain, care must be taken because the transparent film may be softened and deformed. Thereafter, generally, a near-infrared absorbing layer 34 as a second functional layer and a transparent pressure-sensitive adhesive layer 35 are formed on the back side (usually the entire surface) of the transparent film 32, and then a width direction is obtained using a laser. To obtain a rectangular optical filter having a conductive layer exposed region 13 ′ (electrode portion) around it (cutting may be performed by a cutting machine or the like). A plan view of such an optical filter is shown in FIG. In the method of FIG. 7, one optical filter is obtained in the width direction, but as in FIG. 1, for example, two lasers are installed in the center, and the laser is not only at both ends but also at the center parallel to the ends. May be used to obtain a two-sheet optical filter in the width direction.

  Alternatively, during or after the above process (end laser irradiation) or after the above process, the hard coat layer 36 of the elongated laminate from which the metal conductive layer is exposed is irradiated with a laser in the width direction, whereby the hard coat of the irradiated portion The layer 16 may be removed to expose the metal conductive layer in the width direction. By performing this continuously, when the laser irradiation is performed on the vicinity of the side edges on both sides, a metal conductive layer exposed on the entire periphery can be obtained (see FIG. 4). Laser irradiation in the width direction is generally performed by stopping the travel of the filter and moving it in the width direction.

  Alternatively, in the laser irradiation step (3), the long laminate is fixed to the surface of the rectangular glass substrate (for example, using the transparent adhesive layer 15 described below), and the edge of the glass substrate (A laser may be used at this time), and the conductive layer is exposed by irradiating laser to both ends or the peripheral ends of the rectangular laminate attached to the glass substrate. Further, a rectangular optical filter having a conductive layer exposed region (electrode portion) in the vicinity of both end portions or in the vicinity of the peripheral end portion can be obtained. The plan view of such an optical filter is shown in FIG. 8 in the case of a frame-shaped electrode portion having an electrode portion in the periphery (the hard coating layer does not remain at the outermost portion). By adopting this method, since the long laminate is fixed on the glass substrate, there is no occurrence of misalignment of the laminate or floating of the laminate. It is possible to obtain an optical filter having an excellent appearance.

  A near-infrared absorbing layer 34 as a second functional layer and a transparent adhesive layer 35 may be formed on the back side (usually the entire surface) of the long transparent film 32. In this case, FIG. As shown in FIG. 1, an optical filter which is one of the preferred embodiments of the present invention is obtained. The transparent adhesive layer 35 may not be provided. Various conductive materials for grounding are connected to the electrode portion (conductive layer exposed region 33 ′) of the obtained optical filter. In addition, the said hard-coat layer is shown as 1 type of the 1st functional layer of this invention.

  Or after forming the said electrode part, the near-infrared absorption layer 34 as a 2nd functional layer and the transparent adhesive layer 35 on it may be formed in the back side (normally whole surface) of the transparent film 32. FIG. The transparent adhesive layer 35 may not be provided.

  The conductive layer exposed region 33 'is used as an electrode portion for grounding. The width (L in FIG. 8) of the thin band-like region at both edges is generally 2 to 100 mm, particularly preferably 5 to 50 mm. Further, the width of the thin band-like region of the edge hard coat layer 16 'is generally 0.1 to 20 mm, and particularly preferably 0.5 to 5 mm.

  Although the conductive layer exposed region 33 ′ in FIG. 8 is a belt-shaped region, in the present invention, it is sufficient that an exposed conductive layer capable of forming an electrode portion is present at the edge, so the conductive layer exposed region is, for example, intermittent. An intermittent band-like region in which typical island-like regions exist continuously may be used. In this case, the laser may be radiated largely and intermittently. The island region may have any shape such as a rectangle, an ellipse, a circle, and a polygon. The island regions may all be the same size, but may be different from each other.

  On the hard coat layer 36, it is preferable to provide a low refractive index layer having a refractive index lower than that of the hard coat layer 36 in order to improve the antireflection property. In this case, generally, the hard coat layer is formed on the entire surface of the hard coat layer. . When a hard coat layer and a low refractive index layer are provided, coating and (light) curing may be performed separately. However, after the hard coat layer and the low refractive index layer are applied, ) It may be cured. Further, although the hard coat layer 36 is formed on the metal conductive layer, it is also preferable to provide an antiglare layer and, if necessary, a low refractive index layer according to the desired design of the optical filter.

  FIG. 10 shows an example of a schematic cross-sectional view of the optical filter in which the low refractive index layer (antireflection layer) is further provided on the hard coat layer in the display optical filter of the present invention shown in FIG. . In FIG. 10, a mesh-like metal conductive layer 43, a hard coat layer 46, and a low refractive index layer 27 are provided in this order on one surface of a transparent film 42, and a near-infrared absorbing layer 44 and its layer are provided on the other surface. A transparent adhesive layer 45 is provided on the top. In this case, laser irradiation is performed in the vicinity of the surface end portion of the low refractive index layer 47. Similar to FIG. 9, the conductive layer exposed region 43 ′ is present in the end region. A layer (eg, high refractive index layer) provided on the hard coat layer 46 is provided in the center as in the low refractive index layer 47. Further, the mesh gaps of the mesh-like metal layer 44 are filled with the hard coat layer 46, thereby improving the transparency. The same applies to the mesh metal layer 44.

  In the above configuration, the positions of the hard coat layer 46, the low refractive index layer (such as an antireflection layer) 47, and the near-infrared absorbing layer 44 may be interchanged, and the near-infrared absorbing layer 44 is made of metal. It may be provided between the conductive layer 43 and the hard coat layer 46. However, the configuration of FIG. 10 is advantageous in that the grounding is easy to install because the conductive layer is present on the front surface (front side) of the display when the display is mounted.

  The metal conductive layers 13, 23 and the like are, for example, a mesh-like metal layer or a metal-containing layer, a metal oxide layer (dielectric layer), or an alternately laminated film of metal oxide layers and metal layers. The mesh-like metal layer or metal-containing layer is generally formed by etching or printing, or is a metal fiber layer. This makes it easy to obtain low resistance. In general, the voids of the mesh of the mesh-like metal layer or metal-containing layer are filled with the hard coat layers 16 and 26 or the antiglare layer as described above. This improves transparency. In the case where the hard coat layers 16 and 26 are not filled, it is preferable that the hard coat layers 16 and 26 are filled with other layers, for example, near infrared absorption layers 14 and 24 or a transparent resin layer dedicated thereto.

  The low refractive index layer 27 and the like constitute an antireflection layer. That is, the antireflection effect is efficiently shown by the composite film of the hard coat layers 16, 26 and the like and the low refractive index layer provided thereon. A high refractive index layer may be provided between the low refractive index layer and the hard coat layer. This improves the antireflection function.

  The low refractive index layer 27 or the like may not be provided, and only the transparent film and the hard coat layers 16 and 26 having a refractive index higher or lower (preferably lower) than the transparent film may be used. The hard coat layers 16 and 26, the antireflection layer 27 and the like are generally formed by coating. It is preferable from the viewpoint of productivity and economy.

  The near-infrared absorbing layers 14, 24, etc. have a function of blocking unnecessary light such as neon emission of PDP. In general, it is a layer containing a dye having an absorption maximum at 800 to 1200 nm. The transparent adhesive layers 15 and 25 are generally provided for easy mounting on a display. A release sheet may be provided on the transparent adhesive layer 15.

  The electrode part is a metal conductive layer around the optical filter, and the width (L in FIG. 3 and the like) is generally preferably 2 to 100 mm, particularly preferably 5 to 50 mm as described above. The metal conductive layer is preferably a mesh metal layer.

  The rectangular optical filter for display uses one transparent film, but two transparent films may be used. For example, the back surface of a transparent film having an antireflection layer such as a hard coat layer and a low refractive index layer on the metal conductive layer of a transparent film having a metal conductive layer (generally having a near infrared absorption layer on the back surface) is an adhesive layer. It is also obtained by irradiating a laser as described above from an antireflection layer such as a hard coat layer and a low refractive index layer. Alternatively, an antireflection layer such as a mesh-like metal conductive layer, a hard coat layer, and a low refractive index layer is provided in this order on the surface of the transparent film, and a near-infrared absorbing layer and an upper layer are provided on the surface of another transparent film. A transparent pressure-sensitive adhesive layer is provided on the surface, and two transparent film layers are not provided, and the surfaces are adhered to each other. In this case, the former laminate is produced by the method of the present invention.

  The two transparent films are employed when it is advantageous in terms of production, but are disadvantageous in that they are bulky because the thickness is increased.

  As described above, the optical filter for display using one transparent film, for example, has a metal conductive layer formed on one whole surface of a rectangular plastic film, and then a hard coat layer and a low refractive index on the conductive layer. An antireflection layer such as a rate layer is formed, an exposed region of the conductive layer is formed by laser irradiation, and a near-infrared absorbing layer, a transparent adhesive layer, etc. are formed on the other surface (or pre-formed on the back surface of the plastic film). Thus, an optical filter is obtained. The produced filter is designed in accordance with the shape of the display portion on the entire surface of each display. In such an optical filter, an electrode portion of a conductive layer protrudes in the periphery, and this forms an electrode portion (ground electrode) that can be easily mounted on the ground and the display.

In the present invention, the exposed region of the conductive layer is formed by laser irradiation as described above. The laser that can be used in the present invention may be any laser that can remove the synthetic resin layer by burning, decomposition, etc. in a short time, and that does not damage the metal conductive layer, or can be set as such. As the laser irradiation technique, a line beam shaping technique, a laser beam branching technique, a double pulse technique or the like can be used alone or in combination. As the laser light, a YAG laser (double wave, triple wave), ruby laser, excimer laser, semiconductor laser, CO ₂ laser, argon laser, or the like can be used. In particular, a YAG laser (double wave, triple wave), semiconductor laser, and CO ₂ laser are preferable because the synthetic resin layer can be removed by burning, decomposition, or the like in a very short time. This is because these wavelengths generally coincide with the absorption of the synthetic resin of the first functional layer. It is preferable that the laser is focused at a power of 5 to 15 kW, a diameter at a focal point of 0.05 to 10 mm, and a moving speed of 1 to 3000 mm / sec. When cutting with a laser, it is preferable that the output is 5 W to 15 kW, the diameter at the focal point is focused to 0.05 to 10 mm, and the moving speed is 1 to 3000 mm / sec.

The laser used for irradiation is generally a single wavelength, but a laser having a plurality of wavelengths can be used by using a combiner lens (mixed lens) (for example, the main is a CO ₂ laser and the sub is YVO ₄ or YAG). . This makes it possible to completely remove the synthetic resin or the like of the first functional layer that could not be completely removed after the main laser irradiation with the sub laser.

  In the case of a rectangular transparent film, each layer may be formed in a batch system, but it is preferable that each layer is formed on a continuous transparent film by a continuous system, generally a roll-to-roll system, and then cut.

  The material used for the optical filter for display of this invention is demonstrated below.

  The transparent film is generally a transparent plastic film. The material is not particularly limited as long as it is transparent (meaning “transparent to visible light”). Examples of plastic films include polyester {eg, polyethylene terephthalate (PET), polybutylene terephthalate}, polymethyl methacrylate (PMMA), acrylic resin, polycarbonate (PC), polystyrene, triacetate resin, polyvinyl alcohol, polyvinyl chloride, poly Examples thereof include vinylidene chloride, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl butyral, metal ion crosslinked ethylene-methacrylic acid copolymer, polyurethane, cellophane and the like. Among these, polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), etc. are highly resistant to loads during processing (heat, solvent, bending, etc.) and particularly highly transparent. preferable. In particular, PET is preferable because it has excellent processability.

  The thickness of the transparent film varies depending on the use of the optical filter, but is generally 1 μm to 10 mm, 1 μm to 5 mm, and particularly preferably 25 to 250 μm.

  The metal conductive layer of the present invention is set so that the surface resistance value of the obtained optical filter is generally 10Ω / □ or less, preferably in the range of 0.001 to 5Ω / □, particularly 0.005 to 5Ω / □. Is done. A mesh-like conductive layer is also preferable. Alternatively, the conductive layer may be a layer obtained by a vapor deposition method (a transparent conductive thin film of metal oxide (ITO or the like)). Further, it may be an alternate laminate of a metal oxide dielectric film such as ITO and a metal layer such as Ag (eg, ITO / silver / ITO / silver / ITO laminate).

  The mesh-like metal conductive layer is made of metal fibers and metal-covered organic fibers made of a mesh, the copper foil on the transparent film is etched into a mesh and the openings are provided, on the transparent film Examples thereof include a conductive ink printed in a mesh shape.

  In the case of a mesh-shaped metal conductive layer, the mesh preferably has a wire diameter of 1 μm to 1 mm and an aperture ratio of 40 to 95% made of metal fibers and / or metal-coated organic fibers. A more preferable wire diameter is 10 to 500 μm, and an aperture ratio is 50 to 95%. When the wire diameter exceeds 1 mm in the mesh-like conductive layer, the electromagnetic wave shielding property is improved, but the aperture ratio is lowered and cannot be made compatible. If it is less than 1 μm, the strength as a mesh is lowered and handling becomes difficult. Further, when the aperture ratio exceeds 95%, it is difficult to maintain the shape as a mesh. When the aperture ratio is less than 40%, the light transmittance is reduced, and the amount of light from the display is also reduced.

  The opening ratio of the conductive mesh refers to the area ratio occupied by the opening portion in the projected area of the conductive mesh.

  The metal fibers constituting the mesh-like conductive layer and the metal of the metal-coated organic fiber include copper, stainless steel, aluminum, nickel, titanium, tungsten, tin, lead, iron, silver, carbon or alloys thereof, preferably copper, Stainless steel and nickel are used.

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

  When a conductive foil such as a metal foil is subjected to pattern etching, copper, stainless steel, aluminum, nickel, iron, brass, or an alloy thereof, preferably copper, stainless steel, or aluminum is used as the metal of the metal foil.

  If the thickness of the metal foil is too thin, it is not preferable in terms of handleability and workability of pattern etching, and if it is too thick, it affects the thickness of the film obtained, and the time required for the etching process becomes long. The thickness is preferably about 1 to 200 μm.

  The shape of the etching pattern is not particularly limited, and examples thereof include a grid-like metal foil in which square holes are formed, and a punching metal-like metal foil in which circular, hexagonal, triangular or elliptical holes are formed. It is done. Further, the holes are not limited to those regularly arranged, and may be a random pattern. It is preferable that the area ratio of the opening part in the projection surface of this metal foil is 20 to 95%.

  In addition to the above, as a mesh-shaped metal conductive layer, dots are formed on the film surface by a material soluble in a solvent, and a conductive material layer made of a conductive material insoluble in a solvent is formed on the film surface. A mesh-like metal conductive layer obtained by removing the dots and the conductive material layer on the dots by bringing the film surface into contact with a solvent may be used.

  A metal plating layer may be further provided on the metal conductive layer in order to improve the conductivity (particularly in the case of forming a dot with a material soluble in the solvent). The metal plating layer can be formed by a known electrolytic plating method or electroless plating method. As the metal used for plating, generally, copper, copper alloy, nickel, aluminum, silver, gold, zinc or tin can be used, preferably copper, copper alloy, silver or nickel, In particular, it is preferable to use copper or a copper alloy from the viewpoint of economy and conductivity.

  Moreover, you may give anti-glare performance. When this anti-glare treatment is performed, a blackening treatment may be performed on the surface of the (mesh) conductive layer. For example, oxidation treatment of a metal film, black plating such as chromium alloy, application of black or dark ink, and the like can be performed.

  The antireflection layer of the present invention is generally a composite film of a hard coat layer having a refractive index lower than that of a transparent film as a substrate and a low refractive index layer having a refractive index lower than that of the hard coat layer provided thereon, or This is a composite film in which a high refractive index layer is further provided between the hard coat layer and the low refractive index layer. The antireflection film is effective even if it is only a hard coat layer having a refractive index lower than that of the substrate. However, when the refractive index of the substrate is low, a composite film of a hard coat layer having a higher refractive index than the transparent film and a low refractive index layer provided thereon, or a higher refractive index layer is provided on the low refractive index layer. A composite film obtained may be used.

  The hard coat layer is a layer mainly composed of a synthetic resin such as an acrylic resin layer, an epoxy resin layer, a urethane resin layer, or a silicon resin layer. The thickness is usually 1 to 50 μm, preferably 1 to 10 μm. The synthetic resin is generally a thermosetting resin or an ultraviolet curable resin, and an ultraviolet curable resin is preferable. The ultraviolet curable resin is preferable because it can be cured in a short time, has excellent productivity, and is easily removed by a laser.

  Examples of the thermosetting resin include phenol resin, resorcinol resin, urea resin, melamine resin, epoxy resin, acrylic resin, urethane resin, furan resin, and silicon resin.

  The hard coat layer is preferably a cured layer of a layer mainly composed of an ultraviolet curable resin composition (consisting of an ultraviolet curable resin, a photopolymerization initiator, etc.), and usually has a thickness of 1 to 50 μm, preferably 1 10 μm.

  Examples of the ultraviolet curable resin (monomer, oligomer) include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 2-ethylhexyl polyethoxy (meth) acrylate. , Benzyl (meth) acrylate, isobornyl (meth) acrylate, phenyloxyethyl (meth) acrylate, tricyclodecane mono (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, acryloylmorpholine , N-vinylcaprolactam, 2-hydroxy-3-phenyloxypropyl (meth) acrylate, o-phenylphenyloxyethyl (meth) acrylate, neopentylglyce Di (meth) acrylate, neopentyl glycol dipropoxy di (meth) acrylate, neopentyl glycol di (meth) acrylate hydroxypivalate, tricyclodecane dimethylol di (meth) acrylate, 1,6-hexanediol di (meth) Acrylate, nonanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, tris [(meth) acryloxyethyl] isocyanurate, ditrimethylolpropane (Meth) acrylate monomers such as tetra (meth) acrylate; polyol compounds (for example, ethylene glycol, propylene glycol, neopentyl glycol, , 6-hexanediol, 3-methyl-1,5-pentanediol, 1,9-nonanediol, 2-ethyl-2-butyl-1,3-propanediol, trimethylolpropane, diethylene glycol, dipropylene glycol, polypropylene Polyols such as glycol, 1,4-dimethylolcyclohexane, bisphenol A polyethoxydiol, polytetramethylene glycol, the polyols and succinic acid, maleic acid, itaconic acid, adipic acid, hydrogenated dimer acid, phthalic acid, isophthalic acid Polyester polyols which are reaction products of polybasic acids such as acid and terephthalic acid or acid anhydrides thereof, polycaprolactone polyols which are reaction products of the polyols and ε-caprolactone, the polyols and the above, Polybasic acid or this Reaction products of these acid anhydrides with ε-caprolactone, polycarbonate polyols, polymer polyols, etc.) and organic polyisocyanates (for example, tolylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, diphenylmethane-4,4′-diisocyanate, diisocyanate) Cyclopentanyl diisocyanate, hexamethylene diisocyanate, 2,4,4′-trimethylhexamethylene diisocyanate, 2,2′-4-trimethylhexamethylene diisocyanate, etc.) and a hydroxyl group-containing (meth) acrylate (for example, 2-hydroxyethyl (meta ) Acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenyloxypropyl (meth) acrylic Rate, cyclohexane-1,4-dimethylol mono (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, glycerin di (meth) acrylate, etc.) (Meth) such as bisphenol type epoxy (meth) acrylate, which is a reaction product of bisphenol type epoxy resin such as polyurethane (meth) acrylate, bisphenol A type epoxy resin, bisphenol F type epoxy resin and (meth) acrylic acid, which are reactants Examples include acrylate oligomers. These compounds can be used alone or in combination. These ultraviolet curable resins may be used as a thermosetting resin together with a thermal polymerization initiator.

  For the hard coat layer, among the above-mentioned ultraviolet curable resins (monomers and oligomers), hard materials such as pentaerythritol tri (meth) acrylate, pentaerythritol penta (meth) acrylate and dipentaerythritol hexa (meth) acrylate are used. It is preferable to mainly use polyfunctional monomers.

  Any compound suitable for the properties of the ultraviolet curable resin can be used as the photopolymerization initiator for the ultraviolet curable resin. For example, acetophenone such as 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropane-1 Benzoin series such as benzyl dimethyl ketal, benzophenone, 4-phenylbenzophenone, benzophenone series such as hydroxybenzophenone, thioxanthone series such as isopropylthioxanthone, 2-4-diethylthioxanthone, and other special types include methylphenyl glyoxylate Etc. can be used. Particularly preferably, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropane-1, Examples include benzophenone. These photopolymerization initiators may be optionally selected from one or more known photopolymerization accelerators such as benzoic acid type or tertiary amine type such as 4-dimethylaminobenzoic acid. It can be used by mixing at a ratio. Moreover, it can be used by 1 type, or 2 or more types of mixture of only a photoinitiator. Particularly preferred is 1-hydroxycyclohexyl phenyl ketone (Irgacure 184, manufactured by Ciba Specialty Chemicals).

  Generally the quantity of a photoinitiator is 0.1-10 mass% with respect to a resin composition, Preferably it is 0.1-5 mass%.

  Further, the hard coat layer may contain a small amount of an ultraviolet absorber, an infrared absorber, an anti-aging agent, a paint processing aid, a colorant and the like. In particular, it is preferable to contain an ultraviolet absorber (for example, a benzotriazole-based ultraviolet absorber or a benzophenone-based ultraviolet absorber), whereby yellowing of the filter can be efficiently prevented. The amount thereof is generally 0.1 to 10% by mass, preferably 0.1 to 5% by mass, based on the resin composition.

  The hard coat layer preferably has a refractive index lower than that of the transparent film. By using the ultraviolet curable resin, a refractive index lower than that of the substrate is generally easily obtained. Therefore, it is preferable to use a material having a high refractive index such as PET as the transparent substrate. Therefore, the hard coat layer preferably has a refractive index of 1.60 or less. The film thickness is as described above.

The high refractive index layer is made of a polymer (preferably UV curable resin) such as ITO, ATO, Sb ₂ O ₃ , SbO ₂ , In ₂ O ₃ , SnO ₂ , ZnO, Al-doped ZnO, TiO _2, etc. A layer (cured layer) in which conductive metal oxide fine particles (inorganic compound) are dispersed is preferable. The metal oxide fine particles preferably have an average particle size of 10 to 10,000 nm, preferably 10 to 50 nm. In particular, ITO (especially having an average particle diameter of 10 to 50 nm) is preferable. Those having a refractive index of 1.64 or more are suitable. The film thickness is generally in the range of 10 to 500 nm, preferably 20 to 200 nm.

  When the high refractive index layer is a conductive layer, the minimum reflectance of the surface reflectance of the antireflection film is set within 1.5% by setting the refractive index of the high refractive index layer 2 to 1.64 or more. The minimum reflectance of the surface reflectance of the antireflection film can be made to be within 1.0% by setting it to 1.69 or more, preferably 1.69 to 1.82.

  The low refractive index layer is a layer (cured) in which fine particles such as silica and fluororesin, preferably 10 to 40% by weight (preferably 10 to 30% by mass) of hollow silica are dispersed in a polymer (preferably UV curable resin). Layer). The refractive index of this low refractive index layer is preferably 1.45 to 1.51. When the refractive index is more than 1.51, the antireflection property of the antireflection film is deteriorated. The film thickness is generally in the range of 10 to 500 nm, preferably 20 to 200 nm.

  As the hollow silica, those having an average particle diameter of 10 to 100 nm, preferably 10 to 50 nm, and a specific gravity of 0.5 to 1.0, preferably 0.8 to 0.9 are preferable.

  The hard coat layer preferably has a visible light transmittance of 85% or more. Both the visible light transmittance of the high refractive index layer and the low refractive index layer are preferably 85% or more.

  When the antireflection layer is composed of the hard coat layer and the above two layers, for example, the thickness of the hard coat layer is 2 to 20 μm, the thickness of the high refractive index layer is 75 to 90 nm, and the thickness of the low refractive index layer is It is preferable that it is 85-110 nm.

  In order to form each layer of the antireflection layer, for example, as described above, the above-mentioned fine particles are blended with a polymer (preferably an ultraviolet curable resin) as necessary, and the obtained coating liquid is mixed with the rectangular transparent After coating on the substrate surface and then drying, it may be cured by irradiation with ultraviolet rays. In this case, each layer may be applied and cured one by one, or all the layers may be applied and then cured together.

  As a specific method of coating, a method of coating a coating solution in which an ultraviolet curable resin containing an acrylic monomer or the like is made into a solution with a solvent such as toluene is coated with a gravure coater, and then dried, and then cured by ultraviolet rays. Can be mentioned. This wet coating method has the advantage that the film can be uniformly formed at high speed at low cost. After this coating, for example, by irradiating and curing with ultraviolet rays, the effect of improving the adhesion and increasing the hardness of the film can be obtained. The conductive layer can be formed similarly.

  In the case of ultraviolet curing, many light sources that emit light in the ultraviolet to visible range can be used as the light source, such as ultra-high pressure, high pressure, low pressure mercury lamp, chemical lamp, xenon lamp, halogen lamp, mercury lamp, carbon arc lamp, incandescent lamp. And laser light. The irradiation time cannot be determined unconditionally depending on the type of lamp and the intensity of the light source, but is about several seconds to several minutes. Moreover, in order to accelerate curing, the laminate may be preheated to 40 to 120 ° C. and irradiated with ultraviolet rays.

  It is also preferable to provide an antiglare layer instead of the hard coat layer as described above. What has a large antireflection effect is easily obtained. The antiglare layer is, for example, a liquid in which pigment fine particles (eg, carbon black, black iron oxide) are dispersed in a binder (ink medium), or a transparent filler (preferably average particles) such as polymer fine particles (eg, acrylic beads). An antiglare layer made of a metal sulfide is formed by applying and drying a liquid in which a diameter of 1 to 10 μm) is dispersed in a binder, or drying the metal layer by a blackening treatment such as a sulfidation treatment. Alternatively, an antiglare layer having a hard coat function obtained by applying and curing a liquid obtained by adding a transparent filler (polymer fine particles; eg, acrylic beads) to the above-described hard coat layer forming material is preferable. The layer thickness of the antiglare layer is generally in the range of 0.01 to 1 μm.

  A near-infrared absorption layer is generally obtained by forming a layer containing a pigment or the like on the surface of a transparent film. The near-infrared absorbing layer is obtained, for example, by applying an ultraviolet curable or electron beam curable resin containing the dye and binder resin, or a coating solution containing a thermosetting resin, and if necessary, drying and curing. It is done. Alternatively, it can also be obtained by applying a coating solution containing the above-mentioned pigment and binder resin and simply drying it. When used as a film, it is generally a near-infrared cut film, such as a film containing a pigment or the like. The dye generally has an absorption maximum at a wavelength of 800 to 1200 nm. Examples include phthalocyanine dyes, metal complex dyes, nickel dithiolene complex dyes, cyanine dyes, squarylium dyes, polymethine dyes, Examples thereof include azomethine dyes, azo dyes, polyazo dyes, diimonium dyes, aminium dyes, and anthraquinone dyes, and cyanine dyes or squarylium dyes are particularly preferable. These dyes can be used alone or in combination. Examples of the binder resin include thermoplastic resins such as acrylic resins.

  In the present invention, the near-infrared absorbing layer may be provided with a function of adjusting color tone by providing a function of absorbing neon light emission. For this purpose, a neon-emission absorption layer may be provided, but a neon-emission selective absorption dye may be included in the near-infrared absorption layer.

  Examples of selective absorption dyes for neon emission include cyanine dyes, squarylium dyes, anthraquinone dyes, phthalocyanine dyes, polymethine dyes, polyazo dyes, azurenium dyes, diphenylmethane dyes, and triphenylmethane dyes. it can. Such a selective absorption dye is required to have a selective absorption of neon emission near 585 nm and a small absorption at other visible light wavelengths, so that the absorption maximum wavelength is 575 to 595 nm and the absorption spectrum half width is What is 40 nm or less is preferable.

  Also, when combining multiple types of near-infrared or neon luminescent absorbing dyes, if there is a problem with the solubility of the dye, if there is a reaction between the dyes due to mixing, if there is a decline in heat resistance, moisture resistance, etc. All the near-infrared absorbing dyes need not be contained in the same layer, and may be contained in another layer.

  Further, as long as the optical properties are not greatly affected, coloring pigments, ultraviolet absorbers, antioxidants and the like may be further added.

  As a near-infrared absorption characteristic of the optical filter of the present invention, it is preferable that the transmittance at 850 to 1000 nm is 20% or less, and further 15%. Moreover, as selective absorptivity, it is preferable that the transmittance | permeability of 585 nm is 50% or less. Especially in the former case, there is an effect of reducing the transmittance in a wavelength region where malfunction of a remote controller of a peripheral device is pointed out. In the latter case, an orange color having a peak at 575 to 595 nm is color reproducibility. This has the effect of absorbing the orange wavelength, thereby improving the redness and improving the color reproducibility.

  The layer thickness of the near infrared absorbing layer is generally 0.5 to 50 μm.

  When a conductive adhesive tape is applied to the metal conductive layer exposed at the edge, the conductive adhesive tape is provided with an adhesive layer in which conductive particles are dispersed on one surface of the metal foil, As the adhesive layer, an acrylic, rubber-based, or silicone-based adhesive, or an epoxy-based or phenol-based resin mixed with a curing agent can be used.

  The conductive particles dispersed in the adhesive layer may be any electrically good conductor, and various types can be used. For example, metal powder such as copper, silver, nickel, etc., resin coated with such metal, ceramic powder, or the like can be used. Further, there is no particular limitation on the shape thereof, and any shape such as a flake shape, a dendritic shape, a granular shape, and a pellet shape can be taken.

  The blending amount of the conductive particles is preferably 0.1 to 15% by volume with respect to the polymer constituting the adhesive layer, and the average particle size is preferably 0.1 to 100 μm. Thus, by prescribing the blending amount and the particle size, it is possible to prevent the conductive particles from condensing and obtain good conductivity.

  As metal foil used as the base material of the conductive pressure-sensitive adhesive tape, foil of copper, silver, nickel, aluminum, stainless steel or the like can be used, and the thickness is usually 1 to 100 μm.

  The pressure-sensitive adhesive layer is coated with a roll coater, die coater, knife coater, my cover coater, flow coater, spray coater, etc., in which the above-mentioned pressure-sensitive adhesive and conductive particles are uniformly mixed with this metal foil in a predetermined ratio. By doing so, it can be easily formed.

  The thickness of this adhesive layer is usually 5 to 100 μm.

  Instead of the conductive adhesive tape, an adhesive made of a material constituting the adhesive layer may be applied to the exposed portion of the conductive layer, and the conductive tape may be stuck thereon.

  The transparent adhesive layer of the present invention is a layer for adhering the optical film of the present invention to a display, and any resin can be used as long as it has an adhesive function. For example, acrylic adhesives, rubber adhesives, SEBS (styrene / ethylene / butylene / styrene) and SBS (styrene / butadiene / styrene) and other thermoplastic elastomers (TPE) as main components TPE-based pressure-sensitive adhesives and adhesives can also be used.

  The layer thickness is generally in the range of 5 to 500 μm, particularly 10 to 100 μm. In general, the optical filter can be equipped by heat-pressing the pressure-sensitive adhesive layer to a glass plate of a display.

  When two transparent films are used in the present invention, these adhesions (adhesive layer) include, for example, ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, acrylic resin (eg, ethylene- ( (Meth) acrylic acid copolymer, ethylene- (meth) ethyl acrylate copolymer, ethylene- (meth) methyl acrylate copolymer, metal ion crosslinked ethylene- (meth) acrylic acid copolymer), partially saponified ethylene -Ethylene copolymers such as vinyl acetate copolymer, carboxylated ethylene-vinyl acetate copolymer, ethylene- (meth) acryl-maleic anhydride copolymer, ethylene-vinyl acetate- (meth) acrylate copolymer (“(Meth) acryl” means “acryl or methacryl”). In addition, polyvinyl butyral (PVB) resin, epoxy resin, phenol resin, silicon resin, polyester resin, urethane resin, rubber adhesive, thermoplastic elastomers such as SEBS and SBS can be used, but good adhesion Acrylic resin adhesives and epoxy resins are easily obtained.

  The layer thickness is generally 10 to 50 μm, preferably 20 to 30 μm. In general, the optical filter can be equipped by heat-pressing the pressure-sensitive adhesive layer to a glass plate of a display.

  When EVA is also used as the material for the transparent adhesive layer, the EVA has a vinyl acetate content of 5 to 50% by weight, preferably 15 to 40% by weight. When the vinyl acetate content is less than 5% by weight, there is a problem in transparency, and when it exceeds 40% by weight, the mechanical properties are remarkably deteriorated and the film formation becomes difficult and the films are easily blocked.

  As the cross-linking agent, an organic peroxide is suitable for heat cross-linking and is selected in consideration of sheet processing temperature, cross-linking temperature, storage stability, and the like. Examples of the peroxide that can be used include 2,5-dimethylhexane-2,5-dihydroperoxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexane-3; t-butyl peroxide; t-butyl cumyl peroxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexane; dicumyl peroxide; α, α'-bis (t-butylperoxy) Isopropyl) benzene; n-butyl-4,4-bis (t-butylperoxy) valerate; 2,2-bis (t-butylperoxy) butane; 1,1-bis (t-butylperoxy) cyclohexane; 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane; t-butylperoxybenzoate; benzoyl peroxide; Luperoxyacetate; 2,5-dimethyl-2,5-bis (tertiarybutylperoxy) hexyne-3; 1,1-bis (tertiarybutylperoxy) -3,3,5-trimethylcyclohexane; 1-bis (tert-butylperoxy) cyclohexane; methyl ethyl ketone peroxide; 2,5-dimethylhexyl-2,5-bisperoxybenzoate; tert-butyl hydroperoxide; p-menthane hydroperoxide; p-chlorobenzoyl Peroxides; tertiary butyl peroxyisobutyrate; hydroxyheptyl peroxide; chlorohexanone peroxide. These peroxides are used singly or in combination of two or more, and are usually used at a ratio of 5 parts by mass or less, preferably 0.5 to 5.0 parts by mass with respect to 100 parts by weight of EVA. .

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

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

  Examples thereof include polyfunctional esters such as acrylic or methacrylic acid esters such as trimethylolpropane, pentaerythritol, glycerin, triallyl cyanurate, triallyl isocyanurate, diallyl phthalate, diallyl isophthalate, diallyl maleate, etc. Examples include allyl group-containing compounds. These are used alone or in combination of two or more, and are usually used in an amount of 0.1 to 2 parts by weight, preferably 0.5 to 5 parts by weight, based on 100 parts by weight of EVA. .

  When EVA is crosslinked by light, a photosensitizer is usually used in an amount of 5 parts by mass or less, preferably 0.1 to 3.0 parts by mass based on 100 parts by mass of EVA instead of the peroxide.

  In this case, usable photosensitizers include, for example, benzoin, benzophenone, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, dibenzyl, 5-nitroacenaphthene, hexachlorocyclopentadiene, p-nitrodiphenyl. , P-nitroaniline, 2,4,6-trinitroaniline, 1,2-benzanthraquinone, 3-methyl-1,3-diaza-1,9-benzanthrone, and the like. Alternatively, two or more types can be mixed and used.

  Moreover, a silane coupling agent is used in combination as an adhesion promoter. As this silane coupling agent, vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycid Xylpropyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-chloropropylmethoxysilane, vinyltrichlorosilane, γ-mercaptopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N- β (aminoethyl) -γ-aminopropyltrimethoxysilane and the like can be mentioned.

  The silane coupling agent is generally used in an amount of 0.001 to 10 parts by mass, preferably 0.001 to 5 parts by mass, based on 100 parts by mass of EVA, and one or more types are mixed and used.

  In addition, the EVA adhesive layer according to the present invention may further contain a small amount of an ultraviolet absorber, an infrared absorber, an anti-aging agent, a coating processing aid, a colorant, and the like. A small amount of a filler such as hydrophobic silica or calcium carbonate may be included.

  The pressure-sensitive adhesive layer for the above-mentioned adhesion is, for example, a mixture of EVA and the above-mentioned additives, kneaded with an extruder, roll, etc., and then formed into a predetermined shape by a film forming method such as calendar, roll, T-die extrusion, inflation It is manufactured by forming a sheet.

  A protective layer may be provided on the antireflection layer. The protective layer is preferably formed in the same manner as the hard coat layer.

  The material of the release sheet provided on the transparent adhesive layer is preferably a transparent polymer having a glass transition temperature of 50 ° C. or higher. Examples of such a material include polyesters such as polyethylene terephthalate, polycyclohexylene terephthalate, and polyethylene naphthalate. In addition to polyamide resins such as nylon resins, nylon 46, modified nylon 6T, nylon MXD6, polyphthalamide, ketone resins such as polyphenylene sulfide and polythioether sulfone, and sulfone resins such as polysulfone and polyether sulfone, Mainly composed of polymers such as polyether nitrile, polyarylate, polyether imide, polyamide imide, polycarbonate, polymethyl methacrylate, triacetyl cellulose, polystyrene, polyvinyl chloride That the resin can be used. Of these, polycarbonate, polymethyl methacrylate, polyvinyl chloride, polystyrene, and polyethylene terephthalate can be suitably used. The thickness is preferably 10 to 200 μm, particularly preferably 30 to 100 μm.

  FIG. 11 shows an example of a state where the optical filter of the present invention is affixed to the image display surface of a plasma display panel which is a kind of display. An optical filter is bonded to the surface of the display surface of the display panel 50 via a transparent adhesive layer 55. That is, an antireflection layer 57 such as a mesh-like conductive layer 53, a hard coat layer 56, and a low refractive index layer is provided in this order on one surface of the transparent film 52, and a near infrared ray is provided on the other surface of the transparent film 52. An optical filter provided with the absorption layer 54 and the transparent adhesive layer 55 is provided on the display surface. The mesh conductive layer 53 ′ is exposed at the edge (side edge) of the filter. The exposed mesh-like conductive layer 43 ′ is brought into contact with a metal cover 59 provided around the plasma display panel 40 via a shield finger (plate spring-like metal part) 58. A conductive gasket or the like may be used instead of the shield finger (plate spring-like metal part). As a result, the optical filter and the metal cover 59 are brought into conduction, and grounding is achieved. The metal cover 59 may be a metal frame or a frame. As is apparent from FIG. 11, the mesh-like conductive layer 53 faces the viewer side. The metal cover 59 covers about 2 to 20 mm from the edge of the edge of the conductive layer 53. Further, the shape of the metal cover 59 may be changed so that the metal cover 59 is in direct contact with the mesh-like conductive layer 53 '.

  Since the PDP display device of the present invention generally uses a plastic film as a transparent substrate, the optical filter of the present invention can be directly bonded to the surface of the glass plate as described above. When one sheet is used, it can contribute to the weight reduction, thickness reduction, and cost reduction of the PDP itself. Compared with the case where a front plate made of a transparent molded body is installed on the front side of the PDP, an air layer having a low refractive index can be eliminated between the PDP and the PDP filter, so that visible light reflection due to interface reflection can be achieved. Problems such as an increase in rate and double reflection can be solved, and the visibility of the PDP can be further improved.

Therefore, the display having the optical filter of the present invention is not only easy to ground, but also has an excellent antireflection effect and antistatic property, hardly emits dangerous electromagnetic waves, is easy to see, is hardly dusty, and is safe. It can be called a display.

  EXAMPLES Hereinafter, although an Example is shown and this invention is demonstrated concretely, this invention is not limited to a following example.

[Example 1]
<Production of optical filter for display with electrode part>
(1) Formation of mesh-shaped metal conductive layer On an easy-adhesion layer of a long polyethylene terephthalate film (width: 600 mm, length 100 m) having a thickness of 100 μm and having an easy-adhesion layer (polyester polyurethane; thickness 20 nm) on the surface A 20% aqueous solution of polyvinyl alcohol was printed in dots. The size of one dot is a square shape with one side of 234 μm, the interval between the dots is 20 μm, and the dot arrangement is a square lattice. The printing thickness is about 5 μm after drying.

  On top of that, copper was vacuum-deposited to an average film thickness of 4 μm. Next, the dots were dissolved and removed by dipping in normal temperature water and rubbing with a sponge, then rinsed with water and dried to form a mesh-like conductive layer on the entire surface of the polyethylene film (see FIG. 1 (1)). ).

  The conductive layer on the film surface had a square lattice shape corresponding to the negative pattern of dots accurately, the line width was 20 μm, and the aperture ratio was 77%. The average thickness of the conductive layer (copper layer) was 4 μm.

(2) Formation of hard coat layer The following formulation:
Dipentaerythritol hexaacrylate (DPHA) 80 parts by mass ITO (average particle size 150 nm) 20 parts by mass Methyl ethyl ketone 100 parts by mass Toluene 100 parts by mass Irgacure 184 (manufactured by Ciba Specialty Chemicals) 4 parts by mass

The coating liquid obtained by mixing the above was applied to the entire surface of the mesh metal conductive layer with a bar coater (see FIG. 1 (2)) and cured by ultraviolet irradiation. Thereby, a hard coat layer (refractive index 1.52) having a thickness of 5 μm was formed on the mesh-like metal conductive layer.

(3) Formation of low refractive index layer The following formulation:
Opstar JN-7212 (manufactured by Nippon Synthetic Rubber Co., Ltd.) 100 parts by weight Methyl ethyl ketone 117 parts by weight Methyl isobutyl ketone 117 parts by weight

The coating liquid obtained by mixing was applied on the hard coat layer using a bar coater, dried in an oven at 80 ° C. for 5 minutes, and then cured by ultraviolet irradiation. Thereby, a low refractive index layer (refractive index 1.42) having a thickness of 90 nm was formed on the hard coat layer.

(4) Formation of near-infrared absorbing layer (having color tone correction function)
Polymethyl methacrylate 30 parts by mass TAP-2 (manufactured by Yamada Chemical Co., Ltd.) 0.4 parts by mass Plast Red 8380 (manufactured by Arimoto Chemical Co., Ltd.) 0.1 parts by mass CIR-1085 (manufactured by Nippon Carlit Co., Ltd.) ) 1.3 parts by mass IR-10A (manufactured by Nippon Shokubai Co., Ltd.) 0.6 parts by mass Methyl ethyl ketone 152 parts by mass Methyl isobutyl ketone 18 parts by mass was mixed on the entire back surface of the polyethylene film. It was applied using a bar coater and dried for 5 minutes in an oven at 80 ° C. Thereby, a near-infrared absorbing layer (having a color tone correction function) having a thickness of 5 μm was formed on the polyethylene film.

(5) Formation of transparent adhesive layer The following formulation:
SK Dyne 1811L (manufactured by Soken Chemical Co., Ltd.) 100 parts by mass Curing agent L-45 (manufactured by Soken Chemical Co., Ltd.) 0.45 parts by mass Toluene 15 parts by mass Ethyl acetate 4 parts by mass Was coated on the near infrared absorbing layer using a bar coater and dried in an oven at 80 ° C. for 5 minutes. This formed a 25-micrometer-thick transparent adhesive layer on the near-infrared absorption layer.

Next, while the obtained laminate was run in a roll-to-roll method at 100 mm / sec, two CO ₂ laser processing machines were fixed and used at both ends of the low refractive index layer, and output was performed. The laser beam was condensed to a diameter of 30 mm and a diameter of 0.5 mm at the focal position. A conductive layer exposed region 23 ′ (width 5 mm) and an outer edge low-refractive index layer 27 ′ (width 0.5 mm) were formed on both ends of the low refractive index layer through this region. Next, the traveling of the laminate was stopped, and using the same CO ₂ laser processing machine, the laser beam was condensed and focused to a diameter of 0.5 mm at an output of 30 W, a moving speed of 100 mm / second, and a focal position, and the width direction The exposed region of the conductive layer was exposed and cut (filter size: 600 mm × 400 mm).

  As a result, an optical filter for display having an electrode part around was obtained.

[Example 2]
An optical filter for display having an electrode portion was obtained in the same manner as in Example 1 except that a high refractive index layer was provided as described below between the hard coat layer and the low refractive index layer.

(6) Formation of high refractive index layer The following formulation:
Dipentaerythritol hexaacrylate (DPHA) 6 parts by weight ZnO (average particle size 4 nm) 4 parts by weight Methyl ethyl ketone 100 parts by weight Toluene 100 parts by weight Irgacure 184 (manufactured by Ciba Specialty Chemicals) Was coated on the hard coat layer using a bar coater and cured by ultraviolet irradiation. As a result, a high refractive index layer (refractive index: 1.70) having a thickness of 90 nm was formed on the hard coat layer.

[Example 3]
In Example 1, an optical filter for display having electrode portions at both edges in the width direction was obtained in the same manner except that (1) the formation of the mesh-like conductive layer was performed as follows.

  A copper foil having a thickness of 10 μm was adhered to the entire surface of an adhesive layer of a long polyethylene terephthalate film (width: 600 mm, length 100 m) having a thickness of 100 μm having an adhesive layer (polyester polyurethane; thickness 20 nm) on the surface. . A dot pattern was formed on this copper foil by a photolithography method, and the exposed portion of the copper foil was etched to form a copper foil having a lattice pattern (wire diameter 10 μm, pitch 250 μm).

  The line width of the conductive layer on the film surface was 10 μm, and the aperture ratio was 90%. The average thickness of the conductive layer (copper layer) was 10 μm.

[Example 4]
An optical filter for display having an electrode portion was obtained in the same manner as in Example 3 except that a high refractive index layer was provided as described below between the hard coat layer and the low refractive index layer.

(6) Formation of high refractive index layer The following formulation:
Dipentaerythritol hexaacrylate (DPHA) 6 parts by weight ZnO (average particle size 4 nm) 4 parts by weight Methyl ethyl ketone 100 parts by weight Toluene 100 parts by weight Irgacure 184 (manufactured by Ciba Specialty Chemicals) Was coated on the hard coat layer using a bar coater and cured by ultraviolet irradiation. As a result, a high refractive index layer (refractive index: 1.70) having a thickness of 90 nm was formed on the hard coat layer.

[Example 5]
Instead of the hard coat layer, an optical filter for display having an electrode part was obtained in the same manner as in Example 3 except that an antiglare layer was provided as described below.

(2) Formation of antiglare layer The following formulation:
Dipentaerythritol hexaacrylate (DPHA) 80 parts by mass ITO (average particle size 150 nm) 20 parts by mass Acrylic beads (average particle size 3.5 μm;
(Product name: MX series, manufactured by Soken Chemical Co., Ltd.) 10 parts by mass Methyl ethyl ketone 100 parts by mass Toluene 100 parts by mass Irgacure 184 (manufactured by Ciba Specialty Chemicals) 4 parts by mass

The coating liquid obtained by mixing the above was applied to the entire surface of the mesh metal conductive layer with a bar coater (see FIG. 1 (2)) and cured by ultraviolet irradiation. This formed the anti-glare layer (refractive index 1.52) of thickness 5 micrometers on a mesh-shaped metal conductive layer.

[Example 6]
For displays having an electrode portion at the outermost peripheral portion (edge portion) in the same manner as in Example 1, except that laser irradiation was performed on the outermost end portions on both sides of the low refractive index layer of the obtained laminate. An optical filter was obtained.

[Example 7]
The laminate obtained in Example 1 was placed on a glass substrate (dimensions: 600 mm × 400 mm) while traveling in a roll-to-roll manner at 100 mm / second, and a transparent adhesive layer was used. Fixed and cut with a cutting machine. Thereafter, two CO ₂ laser processing machines were fixedly used at the peripheral edge of the low refractive index layer, and condensed to a diameter of 0.5 mm at an output of 30 W and a focal position, and laser irradiation was performed. Around the low refractive index layer, a conductive layer exposed region 23 ′ (width 5 mm) and an outer edge low refractive index layer 27 ′ (width 0.5 mm) were formed through this region.

  As a result, an optical filter for display having an electrode part around was obtained.

[Evaluation of optical filter]
(1) Conductivity A resistance meter (trade name: Milliohm Hitester; manufactured by Hioki Electric Co., Ltd.) was connected to the electrodes (two opposed electrode parts) of the optical filter, and the resistance value was measured.

  The results are shown in Table 1.

  In addition, the PDP filters obtained in Examples 1 to 7 are not inferior to the conventional ones in transparency, electromagnetic wave shielding properties, etc. even when actually attached to the PDP, and are very easily attached to the PDP. It can be performed and contributes to the productivity of PDP manufacturing.

It is a figure for demonstrating one example of the manufacturing method of the optical filter for displays with an electrode part of this invention. It is a top view of an example of the optical filter for displays with an electrode part of this invention obtained by the method of FIG. It is a top view of another example of the optical filter for displays with an electrode part of the present invention obtained by the method of FIG. It is a top view of an example of the optical filter for displays with an electrode part of the present invention obtained by another method of the present invention. It is a schematic sectional drawing of one typical example of the optical filter for displays with an electrode part of this invention. It is a schematic sectional drawing of one example of the preferable aspect of the optical filter for displays with an electrode part of this invention. It is a figure for demonstrating one example of another aspect of the manufacturing method of the optical filter for displays with an electrode part of this invention. It is a top view of an example of the optical filter for displays with an electrode part of this invention obtained by the method of FIG. It is a schematic sectional drawing of one example of the optical filter for displays with an electrode part of this invention obtained by the method of FIG. It is a schematic sectional drawing of one preferable example of another aspect of the optical filter for displays with an electrode part of this invention. It is a schematic sectional drawing of an example of the state where the optical filter of this invention was affixed on the image display surface of the plasma display panel which is 1 type of a display.

Explanation of symbols

12, 22, 32, 42 Transparent film 13, 23, 33, 43 Metal conductive layer 13 ', 23', 32 ', 42' Conductive layer exposed area 16, 26, 36, 46 Hard coat layer 16 ', 26' edge Hard coat layer 27, 47 Low refractive index layer 27 'Edge low refractive index layer 14, 24, 34, 44 Near infrared absorbing layer 15, 25, 35, 45 Transparent adhesive layer

Claims (27)

  The first functional layer side of a long laminate including a long transparent film, a metal conductive layer formed on the entire surface thereof, and a first functional layer formed on the entire surface of the metal conductive layer. An electrode part including a step of irradiating a laser to the end part or the vicinity of the side end to remove the first functional layer of the irradiated part and exposing the metal conductive layer while the elongated laminate is running Manufacturing method of optical filter for display which has conductive layer as.   The manufacturing method according to claim 1, wherein the laser irradiation is performed on at least a side end portion on both sides of the first functional layer or a side end vicinity portion.   The manufacturing method according to claim 1 or 2, wherein the laser irradiation is performed simultaneously on both side end portions or side end vicinity portions of the first functional layer.   The laser irradiation to the first functional layer of the long laminate is performed so as to draw a rectangular periphery including a side end portion or a side end vicinity portion of the first functional layer. Manufacturing method.   Before or after the above step, the first functional layer of the elongated laminate with the metal conductive layer exposed is irradiated with a laser in the width direction, thereby removing the first functional layer in the irradiated portion and removing the metal. The manufacturing method of any one of Claims 1-3 which expose a conductive layer.   After the above step, the first functional layer of the elongated laminate with the metal conductive layer exposed is irradiated with a laser in the width direction, thereby removing the first functional layer in the irradiated portion and the metal conductive layer. The manufacturing method of any one of Claims 1-4 which are cut while exposing.   The manufacturing method of any one of Claims 1-6 which perform laser irradiation continuously or intermittently.   The manufacturing method of any one of Claims 1-7 in which the 2nd functional layer is provided in the side in which the metal conductive layer of the transparent film is not provided.   The exposed metal conductive layer is a continuous band-shaped region or an intermittent band-shaped region formed of an island-shaped conductive layer interrupted by the first functional layer in the middle. Manufacturing method.   The manufacturing method according to claim 1, wherein the metal conductive layer is a mesh-like metal conductive layer.   The manufacturing method according to claim 1, wherein the first functional layer is a hard coat layer.   The first functional layer includes a hard coat layer and a low refractive index layer having a lower refractive index than the hard coat layer, and the hard coat layer is in contact with the metal conductive layer. The manufacturing method as described.   The first functional layer includes a hard coat layer, a high refractive index layer having a higher refractive index than the hard coat layer, and a low refractive index layer having a lower refractive index than the hard coat layer, and the hard coat layer is in contact with the metal conductive layer. The manufacturing method of any one of Claims 1-10.   The manufacturing method according to claim 1, wherein the first functional layer is an antiglare layer.   The first functional layer comprises an antiglare layer and a low refractive index layer having a lower refractive index than the antiglare layer, and the antiglare layer is in contact with the metal conductive layer. The manufacturing method as described.   The method according to any one of claims 8 to 15, wherein the second functional layer is at least one layer selected from a near-infrared absorbing layer, a neon cut layer, and a transparent adhesive layer.   The manufacturing method according to any one of claims 8 to 15, wherein the second functional layer comprises a transparent adhesive layer having a near-infrared absorbing function and a neon cut function.   The second functional layer includes a near-infrared absorbing layer having a neon cut function and a transparent adhesive layer, and is provided on the transparent film in this order. Production method.   The manufacturing method according to any one of claims 8 to 15, wherein the second functional layer includes a near-infrared absorbing layer, a neon cut layer, and a transparent adhesive layer, and is provided on the transparent film in this order. .   A long laminate including a long transparent film, a metal conductive layer formed on the entire surface thereof, and a first functional layer formed on the entire surface of the metal conductive layer is moved on the surface of the glass substrate. Attached to the glass substrate and cut into the same shape as the glass substrate, and then irradiated the laser to the side end portion or the side end vicinity portion of the first functional layer of the elongated laminate on the surface of the glass substrate. The manufacturing method of the optical filter for displays which has the process of removing the 1st functional layer of, and exposing a metal conductive layer as an electrode part.   21. The manufacturing method according to claim 20, wherein the laser irradiation is performed on at least both side end portions or near side end portions of the first functional layer on the surface of the glass substrate.   The manufacturing method according to claim 20 or 21, wherein laser irradiation is performed around the first functional layer on the surface of the glass substrate.   An optical filter for display obtained by the manufacturing method according to any one of claims 1 to 22.   An optical filter for display, wherein the optical filter for display obtained by the production method according to any one of claims 1 to 22 is attached to a glass substrate.   The optical filter for display according to claim 23 or 24, wherein the optical filter for display is a filter for a plasma display panel.   A display comprising the optical filter for display according to claim 23 or 24.   A plasma display panel comprising the optical filter for display according to claim 23 or 24.

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