KR102326712B1 - A method for manufacturing an optical display panel and a system for manufacturing an optical display panel. - Google Patents

Abstract

From an optical display panel having an optical film and an optical cell provided on one side of the optical film, on the one side of the optical cell from which the optical film is removed, sheetfed optics having the same configuration as that of the removed optical film A method for manufacturing an optical display panel in which a film is re-attached, wherein a release film, an adhesive layer, an optical function film, a first surface protection film, and a second surface protection film are laminated in this order from a sheetfed optical film to the release film A reattachment step of peeling off and remanufacturing the optical display panel by attaching the sheet-fed optical film to the one side of the optical cell through the pressure sensitive adhesive layer, and after the reattachment step, the second surface protection and a second surface protection film removal step of removing the film.

Description

A method for manufacturing an optical display panel and a system for manufacturing an optical display panel.

The present invention relates to a method for manufacturing an optical display panel and a system for manufacturing an optical display panel.

An optical film in which a release film, an adhesive layer, an optical function film (typically, a polarizing film) and a surface protection film were laminated|stacked in this order is comprised in roll shape. The optical film fed out from this roll-shaped optical film is cut (half-cut) in the width direction while leaving the release film, and the release film is peeled from the optical film obtained by cutting, There is a method (hereinafter also referred to as a "roll-to-panel method") of bonding an optical film to an optical cell through the exposed pressure-sensitive adhesive layer (see, for example, Patent Documents 1 and 2).

On the other hand, as a bonding method of an optical film different from the roll-to-panel method, a method of bonding an optical film previously in a single-wafer state to an optical cell through an adhesive layer exposed by peeling a release film (hereinafter referred to as "sheet - also referred to as "two-panel system") (for example, refer to patent document 3).

Japanese Patent Laid-Open No. 2011-123208 Japanese Patent Laid-Open No. 2015-049115 Japanese Patent Laid-Open No. 2006-039238

By the way, in the manufacturing site of optical display panels including a liquid crystal display panel, not only a roll-to-panel system but a sheet-to-panel system are used together, and the case which manufactures the optical display panel of the same structure is newly generated. For example, in Patent Document 2, an optical display panel is continuously manufactured using a roll-to-panel system, and rework processing is disclosed with respect to the optical display panel determined as a defective product. When a new optical function film is bonded to an optical cell in such a rework process when many defective goods do not generate|occur|produce so much, it is conceivable to use a sheet-to-panel system. Moreover, for example, when mass production of the optical display panel of the same structure is required in a short period of time, it is impossible to procure all the supply amounts by a roll-to-panel system, and it is also conceivable to use a sheet-to-panel system together.

In recent years, as the thickness of an optical display panel progresses, an optical function film (for example, a polarizing film having a thickness of 60 µm or less) that is thinner than the conventional one including a polarizing film has been developed. Such a thin optical function film has weak elasticity (modulus of elasticity), and is prone to distortion, curl, and the like.

According to the roll-to-panel system, the thin optical function film is conveyed to the bonding position in the state laminated|stacked on the carrier film (release film), and the optical function film is peeled from the carrier film (release film) at the said bonding position, and optical In order to bond a functional film to an optical cell, a thin optical function film can be continuously bonded to an optical cell, suppressing generation|occurrence|production of distortion, curl, etc. However, in the sheet-to-panel method, it is difficult to handle such as conveying of the optical function film in a single-wafer state, peeling of the release film, and bonding processing of the optical function film to the liquid crystal cell, and poor bonding occurs, resulting in a decrease in yield. concerned

The present invention is an optical display panel capable of suitably manufacturing an optical display panel having the same configuration as that of an optical display panel manufactured by a roll-to-panel method even when a thin optical function film is bonded to an optical cell by a sheet-to-panel method An object of the present invention is to provide a manufacturing method and manufacturing system of

The present invention relates to an optical film in which an adhesive layer, an optical function film, and a first surface protection film are laminated in this order, and the optical film is removed from an optical display panel having an optical cell provided on one side of the optical film. A method of manufacturing an optical display panel in which a single-leaf optical film having the same configuration as that of the removed optical film is reattached to the one side of the optical cell,

The release film is peeled from the sheet-like optical film in which the release film, the pressure-sensitive adhesive layer, the optical function film, the first surface protection film and the second surface protection film are laminated in this order, and through the pressure-sensitive adhesive layer, the optical cell a reattachment step of remanufacturing the optical display panel by attaching the sheet-like optical film to the one side;

A second surface protection film removal step of removing the second surface protection film is included after the reattachment step.

The said invention may further include the removal process of removing the said optical film from the said optical display panel based on the result of having inspected the said optical cell with the said optical film.

The said invention may further include the test|inspection process of test|inspecting the said optical cell with the said optical film.

The said invention is the said strip|belt-shaped optical film fed out from the roll-shaped optical film formed by winding the strip|belt-shaped optical film in which the release film, the adhesive layer, the optical function film, and the 1st surface protection film are laminated|stacked in this order, A cutting step of cutting while leaving the release film in a direction orthogonal to the longitudinal direction of the optical film;

The adhesion process of attaching the said optical film from which the said release film was peeled to the said one side of the said optical cell via the said adhesive layer may further be included.

In the above invention, a release film, an adhesive layer, an optical function film, and a first surface protection film are laminated in this order, and the optical film in which the cutout is formed at predetermined intervals by removing the release film is wound. It is fed out from a film and the said optical film from which the said release film peeled may further include the adhesion process of affixing to the said one side of the said optical cell via the said adhesive layer.

According to this structure, it is not necessary to cut|disconnect (half-cut) an optical film in a roll-to-panel system.

The said invention is a roll-shaped optical film which is a structure in which a release film, an adhesive layer, an optical function film, and the 1st surface protection film are laminated|stacked in this order,

Even if it further includes the step of preparing an optical film set having a sheet-fed optical film having a structure in which a release film, an adhesive layer, an optical function film, a first surface protection film and a second surface protection film are laminated in this order, do. The "process to prepare" may be a manufacturing process, or a process conveyed from another place and set at a predetermined position may be sufficient as it.

In the above invention, a release film, an adhesive layer, an optical function film, and a first surface protection film are laminated in this order, and the optical film in which the cutout is formed at predetermined intervals by removing the release film is wound. film and

Even if it further includes the step of preparing an optical film set having a sheet-fed optical film having a structure in which a release film, an adhesive layer, an optical function film, a first surface protection film, and a second surface protection film are laminated in this order, do. The "process to prepare" may be a manufacturing process, or a process conveyed from another place and set at a predetermined position may be sufficient as it.

According to this structure, it is not necessary to cut|disconnect (half-cut) an optical film in a roll-to-panel system.

In another invention, the optical film is removed from an optical display panel having an optical film in which an adhesive layer, an optical function film, and a first surface protection film are laminated in this order, and an optical cell in which the optical film is provided on one side. A system for manufacturing an optical display panel in which a single-leaf optical film having the same configuration as that of the removed optical film is re-attached to the one side of the optical cell,

The release film is peeled from the sheet-like optical film in which the release film, the pressure-sensitive adhesive layer, the optical function film, the first surface protection film and the second surface protection film are laminated in this order, and the optical cell is passed through the pressure-sensitive adhesive layer. a reattachment unit for attaching the sheet-like optical film to the one side to reattach the optical display panel;

It has a 2nd surface protection film removal part which removes a said 2nd surface protection film after the process of the said reattachment part.

The said invention may further have the optical film removal part which removes the said optical film from the said optical display panel based on the result of having inspected the said optical cell with the said optical film.

The said invention may further have the inspection part which test|inspects the said optical cell with the said optical film.

The said invention is the said strip|belt-shaped optical film fed out from the roll-shaped optical film formed by winding the strip|belt-shaped optical film in which the release film, the adhesive layer, the optical function film, and the 1st surface protection film are laminated|stacked in this order, A cutting step of cutting while leaving the release film in a direction orthogonal to the longitudinal direction of the optical film;

You may further have the adhesion process of affixing the said optical film from which the said release film peeled on the said one side of the said optical cell via the said adhesive layer.

In the above invention, a release film, an adhesive layer, an optical function film, and a first surface protection film are laminated in this order, and the optical film in which the cutout is formed at predetermined intervals by removing the release film is wound. It is drawn out from a film and you may further have the attachment part which affixes the said optical film from which the said release film was peeled to the said single side of the said optical cell via the said adhesive layer.

According to this structure, it is not necessary to cut|disconnect (half-cut) an optical film in a roll-to-panel system.

The said invention is a roll-shaped optical film which is a structure in which a release film, an adhesive layer, an optical function film, and the 1st surface protection film are laminated|stacked in this order,

You may further have a manufacturing part which manufactures the optical film set which has a sheet-fed optical film which is a structure in which a release film, an adhesive layer, an optical function film, a 1st surface protection film, and a 2nd surface protection film are laminated|stacked in this order. .

In the above invention, a release film, an adhesive layer, an optical function film, and a first surface protection film are laminated in this order, and the optical film in which the cutout is formed at predetermined intervals by removing the release film is wound. film and

You may further have a manufacturing part which manufactures the optical film set which has a sheet-fed optical film which is a structure in which a release film, an adhesive layer, an optical function film, the 1st surface protection film, and the 2nd surface protection film are laminated|stacked in this order.

According to this structure, it is not necessary to cut|disconnect (half-cut) an optical film in a roll-to-panel system.

A "roll-to-panel system" is a system which peels a release film from the optical film feed|fed out from the roll-shaped optical film, and bonds the said optical film to an optical cell through the exposed adhesive layer. Here, by the time a release film peels, the perforation line of a predetermined space|interval should just leave a release film in the optical film in the width direction, and just to form. In addition, the perforation line may be formed in the width direction before the optical film is fed out from a roll, and after feeding, the perforation line may be formed in the width direction before peeling of a release film.

"The sheet-to-panel system" is a system which peels a release film from the optical film previously made into a sheet-wafer state, and bonds the said optical film to an optical cell through the exposed adhesive layer.

In the above invention, when a polarizing film is used as the optical function film (the first optical function film, the second optical function film), or when a polarizing film is included as one member of the configuration of the optical function film In the optical film (first optical film, second optical film) and optical film raw material (first optical film raw material, second optical film raw material) in roll-form and sheetfed form, the absorption axis direction of the polarizing film is, according to the present invention It is not particularly limited as long as it does not impair the achievement of the purpose of That is, even if a roll-to-panel system and a sheet-to-panel system are used together, as long as it becomes the combination which can manufacture the optical display panel of the same structure, the roll-shaped optical film (1st optical film, 2nd optical film) ) and optical film raw material (first optical film raw material, second optical film raw material), in the polarizing film, the absorption axis direction may be parallel to, orthogonal to, the long side direction, and may be inclined (for example, long side) direction at an angle of 45° to the direction). In addition, the absorption axis direction of a rectangular single-leaf-shaped polarizing film may be parallel with respect to a long side direction, may be orthogonal, and may be inclined (for example, the direction which makes an angle of 45 degrees with respect to a long side direction). In addition, the absorption axis direction of the square sheet-like polarizing film may be parallel with respect to any one side, and may be inclined (for example, the direction which makes an angle of 45 degrees with respect to a side).

Said invention WHEREIN: The liquid crystal cell or organic electroluminescent cell of VA mode or IPS mode may be sufficient as the said optical cell.

The shape of the optical cell may be a square or a rectangle, and is not particularly limited as long as it is a shape having a pair of opposing sides and another pair of opposing sides. Moreover, one pair of opposing sides of an optical cell and another pair of opposing sides of an optical cell are mutually orthogonal to each other normally.

ADVANTAGE OF THE INVENTION According to this invention, since handling property is improved, the sheet-fed optical film provided with the 2nd surface protection film uses a sheet-to-panel system, suppressing generation|occurrence|production of distortion, curl, etc. It can be properly bonded to the cell. And, by removing (eg, peeling) the second surface protection film from the sheet-like optical film bonded to the optical display panel, as a result, the same laminated configuration as that of the optical display panel manufactured by the roll-to-panel method An optical display panel can be manufactured. That is, according to the optical film set of the present invention, even when the roll-to-panel method and the sheet-to-panel method are used together when bonding the optical film to the optical cell, an optical display panel having the same configuration can be suitably manufactured. have.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the optical film set.
It is a schematic diagram which shows the method of manufacturing a roll-shaped 1st optical film.
Fig. 2B is a schematic diagram showing a method for manufacturing a sheet-like first optical film;
Fig. 3 is a schematic diagram of a continuous manufacturing system of the optical display panel according to the first embodiment;
4 is a diagram showing the process of remanufacturing;

<Optical Film Set>

First, the optical film set used in the present invention will be described. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows an optical film set. The side surface, a plane, and a partial cross-sectional enlarged view of the roll-shaped 1st optical film 1 are shown in the upper part of FIG. The side, plan, and partial cross-sectional enlarged views of the sheet-like first optical film 2 are shown in the lower part of FIG. 1 . As for the roll-shaped 1st optical film 1, the 1st release film 11, the 1st adhesive layer 12, the 1st optical function film 13, and the 1st surface protection film 14 are laminated|stacked in this order, have.

The roll-shaped 1st optical film 1 is used for manufacturing an optical display panel by a roll-to-panel system. In such a case, the strip|belt-shaped 1st optical film 10 of the width a fed out from the roll-shaped 1st optical film 1 is a 1st release with the predetermined space|interval b by the cutting means C. It is cut leaving the film 11 . The code|symbol s is the cut formed in the 1st optical film 10 by the said cutting|disconnection.

In addition, the sheet-like 1st optical film 2 is the 1st release film 21, the 1st adhesive layer 22, the 1st optical function film 23, the 1st surface protection film 24, and the 2nd The surface protection films 25 are laminated in this order. The sheet-like 1st optical film 2 size is vertical a and horizontal b. The sheet-like first optical film 2 is used to manufacture an optical display panel by a sheet-to-panel system.

In this embodiment, the 1st release film 11 and the 1st release film 21 have the same structure. The first pressure-sensitive adhesive layer 12 and the first pressure-sensitive adhesive layer 22 have the same configuration. The first optical function film 13 and the first optical function film 23 have the same configuration. The 1st surface protection film 14, the 1st surface protection film 24, and the 2nd surface protection film 25 have the same structure. With "same structure", material, thickness, etc. not only correspond completely, but may be substantially the same (for example, it is the same in manufacturing quality).

In this embodiment, the 1st surface protection film 14 (or 24) has a 1st base film and a 1st adhesive layer, and the 1st optical function film 13 ( or (23)). Moreover, as another embodiment, the 1st surface protection film 14 (or 24) may be a self-adhesive film.

In this embodiment, the 2nd surface protection film 25 has a 2nd base film and a 2nd adhesive layer, and is laminated|stacked on the 1st surface protection film 24 via the said 2nd adhesive layer. Moreover, as another embodiment, the 2nd surface protection film 25 may be a self-adhesive film.

(Relationship between phase separation force)

Moreover, the peeling force between the layers of the 1st surface protection film 24 and the 1st optical function film 23 is larger than the peeling force between the layers of the 2nd surface protection film 25 and the 1st surface protection film 24 is the composition According to this, the 2nd surface protection film 25 can be peeled more smoothly. As a measurement of peeling force, a tensile tester can be used, for example. As peeling conditions, it measures by 180 degree peeling of 0.3 m/min. Peeling force is controlled by the composition, thickness, etc. of an adhesive.

The magnitude relationship of the peeling force between each layer in the 1st optical film 2 of sheet-wafer shape is as follows.

The interlayer peeling force A of the first release film 21 and the first pressure-sensitive adhesive layer 22,

Peeling force B between the first adhesive layer 22 and the first optical function film 23,

Peeling force C between the first optical function film 23 and the first surface protection film 24 ,

When it is set as the interlayer peeling force D of the 1st surface protection film 24 and the 2nd surface protection film 25,

A<B, A<C, A<D.

Preferably, A<D<C≤B or A<D<B≤C.

More preferably, A<D<C<B.

According to the relationship of said interphase peeling force, when a 1st release film peels, it can suppress that a 2nd surface protection film peels.

<Optical function film>

The first optical function films 13 and 23 are not particularly limited as long as they are films having an optical function, and examples thereof include a polarizing film, a retardation film, a luminance enhancing film, and a diffusion film, but typically a polarizing film.

(polarizing film)

In this embodiment, from a viewpoint of thickness reduction, it is preferable to use the polarizing film whose thickness (total thickness) is 60 micrometers or less, It is more preferable that it is 55 micrometers or less, It is still more preferable that it is 50 micrometers or less. As a polarizing film, for example, (1) the structure in which the protective film ("polarizer protective film" may be called) is laminated|stacked on both sides of the polarizer (it may be called "both protective polarizing film"), (2) polarizer The structure in which the protective film is laminated|stacked only on one side of (it may be called "one side protective polarizing film"), etc. are mentioned.

(polarizer)

As for the polarizer, the thing using polyvinyl alcohol-type resin is used. As the polarizer, for example, a dichroic substance such as iodine or a dichroic dye is adsorbed to a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene/vinyl acetate copolymer-based partially saponified film. and polyene-based oriented films such as those axially stretched, dehydrated products of polyvinyl alcohol, and dehydrochlorinated products of polyvinyl chloride. Among these, the polarizer which consists of a polyvinyl alcohol-type film and a dichroic substance, such as iodine, is suitable.

A polarizer obtained by uniaxially stretching a polyvinyl alcohol-based film by dyeing it with iodine can be produced by, for example, immersing polyvinyl alcohol in an aqueous solution of iodine, dyeing it, and stretching it to 3 to 7 times its original length. As needed, boric acid, zinc sulfate, zinc chloride, etc. may be included, and it can also be immersed in aqueous solutions, such as potassium iodide. If necessary, the polyvinyl alcohol-based film may be immersed in water before dyeing and washed with water. By washing the polyvinyl alcohol-based film with water, it is possible not only to wash the surface of the polyvinyl alcohol-based film from stains and anti-blocking agents, but also to swell the polyvinyl alcohol-based film to prevent unevenness such as staining of dyeing. Extending|stretching may be performed after dyeing|staining with iodine, may be extended|stretched while dyeing|staining, and may dye|stain with iodine after extending|stretching. It can be extended also in aqueous solutions, such as boric acid and potassium iodide, and a water bath.

It is preferable that the thickness of a polarizer is 10 micrometers or less from a viewpoint of thickness reduction, Furthermore, it is 8 micrometers or less, Furthermore, it is preferable that it is 7 micrometers or less, Furthermore, it is preferable that it is 6 micrometers or less. On the other hand, it is preferable that the thickness of a polarizer is 2 micrometers or more, Furthermore, it is 3 micrometers or more. Such a thin polarizer has little thickness nonuniformity, is excellent in visibility, and since there are few dimensional changes, it is excellent in durability with respect to a thermal shock. On the other hand, in a polarizing film including a polarizer having a thickness of 10 µm or less, since the elasticity (modulus of elasticity) of the film is remarkably low, in a sheet-to-panel system, there is a high possibility of causing distortion, curl, etc. Therefore, this invention is especially suitable for the said polarizing film.

As a thin polarizer, typically,

Japanese Patent No. 4751486 specification,

Japanese Patent No. 4751481 specification,

Japanese Patent No. 4815544 specification,

Japanese Patent No. 5048120 specification,

International Publication No. 2014/077599 pamphlet,

International Publication No. 2014/077636 pamphlet,

The thin-shaped polarizer described in etc. or the thin-shaped polarizer obtained from the manufacturing method as described in these is mentioned.

The polarizer has an optical characteristic expressed by a single transmittance T and a degree of polarization P by the following formula

P>-(10 ^0.929 T ^-42.4 -1)×100 (provided that T<42.3), or

P≥99.9 (however, T≥42.3)

It is preferable that it is configured to satisfy the condition of The polarizer comprised so that the said condition may be satisfy|filled uniquely has the performance calculated|required as the display for liquid crystal TVs using a large sized display element. Specifically, the contrast ratio is 1000:1 or more and the maximum luminance is 500 cd/m 2 or more. As another use, it is joined to the visual recognition side of an organic electroluminescent cell, for example.

As said thin polarizer, among the manufacturing methods including the process of extending|stretching and the process of dyeing in the state of a laminated body, from the point which can extend|stretch at a high magnification and can improve polarization performance, specification of Japanese Patent No. 4751486, Japanese Patent No. 4751481 It is preferably obtained by a manufacturing method including a step of stretching in an aqueous solution of boric acid described in the specification of Japanese Patent No. 4815544 and in the specification of Japanese Patent No. 4815544, and in particular, stretching in the aqueous solution of boric acid described in Japanese Patent No. 4751481 and Japanese Patent No. 4815544. It is preferable to obtain by the manufacturing method including the process of carrying out auxiliary|assistant aerial stretching before. These thin polarizers can be obtained by a manufacturing method including the process of extending|stretching a polyvinyl alcohol-type resin (henceforth PVA-type resin) layer and the resin base material for extending|stretching in the state of a laminated body, and the process of dyeing. If it is this manufacturing method, even if the PVA-type resin layer is thin, it becomes possible to extend|stretch without problems, such as fracture|rupture by extending|stretching, by being supported by the resin base material for extending|stretching.

(Protective Film (Polarizer Protective Film))

The material constituting the protective film is preferably excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy, and the like. For example, polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, cellulose polymers such as diacetyl cellulose and triacetyl cellulose, acrylic polymers such as polymethyl methacrylate, polystyrene or acrylonitrile styrene copolymer Styrenic polymers, such as (AS resin), polycarbonate-type polymer, etc. are mentioned. In addition, polyethylene, polypropylene, polyolefin having a cyclo or norbornene structure, polyolefin polymer such as ethylene/propylene copolymer, vinyl chloride polymer, amide polymer such as nylon or aromatic polyamide, imide polymer, alcohol Phone-based polymer, polyethersulfone-based polymer, polyetheretherketone-based polymer, polyphenylenesulfide-based polymer, vinyl alcohol-based polymer, vinylidene chloride-based polymer, vinylbutyral-based polymer, arylate-based polymer, polyoxymethylene-based polymer, Epoxy polymers or blends of the above polymers are also exemplified as examples of the polymer forming the above protective film.

In addition, one or more types of arbitrary appropriate additives may be contained in a protective film. As an additive, a ultraviolet absorber, antioxidant, a lubricant, a plasticizer, a mold release agent, a coloring inhibitor, a flame retardant, a nucleating agent, antistatic agent, a pigment, a coloring agent etc. are mentioned, for example. Content of the said thermoplastic resin in a transparent protective film becomes like this. Preferably it is 50 to 100 weight%, More preferably, it is 50 to 99 weight%, More preferably, it is 60 to 98 weight%, Especially preferably, it is 70 to 97 weight%. am. When content of the said thermoplastic resin in a transparent protective film is 50 weight% or less, there exists a possibility that the high transparency etc. which a thermoplastic resin originally has may not fully express.

As said protective film, retardation film, a brightness improving film, a diffusion film, etc. can also be used.

Functional layers such as a hard coat layer, an antireflection layer, an antistick layer, a diffusion layer or an antiglare layer may be formed on the surface of the protective film on which the polarizer is not adhered. In addition, the functional layers such as the hard coating layer, the antireflection layer, the anti-sticking layer, the diffusion layer and the anti-glare layer may be provided on the transparent protective film itself, and separately from the transparent protective film.

(intervening layer)

The protective film and the polarizer are laminated with intervening layers such as an adhesive layer, an adhesive layer, and an undercoat layer (primer layer) interposed therebetween. At this time, it is preferable to laminate both without an air gap by an intervening layer.

The adhesive layer is formed by an adhesive. The type of adhesive is not particularly limited, and various types of adhesive may be used. The adhesive layer is not particularly limited as long as it is optically transparent. As the adhesive, various types of adhesives such as water-based, solvent-based, hot-melt-based and active energy ray-curable adhesives are used, but water-based adhesives or active energy ray-curable adhesives are suitable.

Examples of the water-based adhesive include an isocyanate-based adhesive, a polyvinyl alcohol-based adhesive, a gelatin-based adhesive, a vinyl-based latex-based adhesive, and a water-based polyester. A water-based adhesive is used as an adhesive agent which consists of aqueous solution normally, and contains 0.5 to 60weight% of solid content normally.

An active energy ray-curable adhesive is an adhesive which hardening advances by active energy rays, such as an electron beam and an ultraviolet-ray (radical hardening type, cation curing type), For example, it can be used in the form of an electron beam curing type and an ultraviolet curable type. As an active energy ray hardening-type adhesive agent, an optical radical hardening-type adhesive agent can be used, for example. When using an active energy ray hardening-type adhesive agent of an optical radical curing type by an ultraviolet curing type, the said adhesive agent contains a radically polymerizable compound and a photoinitiator.

Moreover, lamination|stacking of a polarizer and a protective film WHEREIN: An easily bonding layer can be provided between a transparent protective film and an adhesive bond layer. The easily-adhesive layer can be formed of various resins having, for example, a polyester skeleton, a polyether skeleton, a polycarbonate skeleton, a polyurethane skeleton, a silicone system, a polyamide skeleton, a polyimide skeleton, a polyvinyl alcohol skeleton, and the like. have. These polymer resins can be used individually by 1 type or in combination of 2 or more type. Moreover, you may add another additive to formation of an easily bonding layer. Specifically, you may further use stabilizers, such as a tackifier, a ultraviolet absorber, antioxidant, and a heat-resistant stabilizer.

An adhesive layer is formed from an adhesive. Various types of pressure-sensitive adhesives can be used as the pressure-sensitive adhesive, for example, rubber pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, silicone pressure-sensitive adhesives, urethane pressure-sensitive adhesives, vinyl alkyl ether pressure-sensitive adhesives, polyvinyl pyrrolidone pressure-sensitive adhesives, polyacrylamide pressure-sensitive adhesives, cellulose pressure-sensitive adhesives, etc. have. The adhesive base polymer is selected according to the type of the adhesive. Among the above-mentioned pressure-sensitive adhesives, an acrylic pressure-sensitive adhesive is preferably used from the viewpoints of excellent optical transparency, moderate wettability, cohesiveness, and adhesive properties, and excellent weather resistance and heat resistance.

The undercoat layer (primer layer) is formed in order to improve the adhesiveness of a polarizer and a protective film. As a material which comprises a primer layer, if it is a material which exhibits strong adhesive force to some extent to both of a base film and a polyvinyl alcohol-type resin layer, it will not specifically limit. For example, a thermoplastic resin excellent in transparency, thermal stability, stretchability, etc. is used. As a thermoplastic resin, an acrylic resin, polyolefin resin, polyester-type resin, polyvinyl alcohol-type resin, or a mixture thereof is mentioned, for example.

(surface protection film)

A 1st, 2nd surface protection film is an optical film. WHEREIN: It is provided in the single side|surface (surface on which the adhesive layer is not laminated|stacked) of a polarizing film, and protects optical function films, such as a polarizing film.

As a base film of a 1st, 2nd surface protection film, the film material which has isotropy from a viewpoint, such as a test|inspection property, manageability, or isotropy, is selected. Examples of the film material include polyester-based resins such as polyethylene terephthalate films, cellulose-based resins, acetate-based resins, polyethersulfone-based resins, polycarbonate-based resins, polyamide-based resins, polyimide-based resins, and transparent polymers such as polyolefin resins and acrylic resins. Among these, polyester-type resin is preferable. A base film can also be used as a laminated body of 1 type, or 2 or more types of film materials, and can also use the stretched material of the said film. It is preferable that the thickness of a base film film is 10 micrometers - 150 micrometers or less, Furthermore, it is preferable that they are 20-100 micrometers.

The 1st, 2nd surface protection film can use the thing which has the said base film and an adhesive layer besides being able to use the said base film as a self-adhesive film. It is preferable to use what has an adhesive layer from a viewpoint of protecting optical function films, such as a polarizing film, as for a 1st, 2nd surface protection film.

As the pressure-sensitive adhesive layer used for lamination of the first and second surface protection films, for example, a (meth)acrylic polymer, silicone polymer, polyester, polyurethane, polyamide, polyether, fluorine-based or rubber-based polymer is used as a base polymer. It can be used by appropriately selecting the pressure-sensitive adhesive. From viewpoints of transparency, weather resistance, heat resistance, etc., the acrylic adhesive which uses an acrylic polymer as a base polymer is preferable. The thickness (dry film thickness) of an adhesive layer is determined with the required adhesive force. It is about 1-100 micrometers normally, Preferably it is 5-50 micrometers.

In addition, a peeling process layer can be formed in the 1st, 2nd surface protection film with low adhesive material, such as silicone treatment, a long-chain alkyl treatment, a fluorine treatment, on the opposite surface of the surface on which the adhesive layer was formed.

<Adhesive layer>

A suitable adhesive can be used for formation of the adhesive layers 12 and 22, and there is no restriction|limiting in particular about the kind. Examples of the pressure-sensitive adhesive include a rubber pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, a urethane pressure-sensitive adhesive, a vinyl alkyl ether pressure-sensitive adhesive, a polyvinyl alcohol-based pressure-sensitive adhesive, a polyvinylpyrrolidone pressure-sensitive adhesive, a polyacrylamide pressure-sensitive adhesive, and a cellulose pressure-sensitive adhesive.

Among these pressure-sensitive adhesives, those which are excellent in optical transparency, exhibit moderate wettability, cohesiveness, and adhesive properties, and are excellent in weather resistance, heat resistance, and the like are preferably used. As what shows these characteristics, an acrylic adhesive is used preferably.

As a method of forming the pressure-sensitive adhesive layers 12 and 22, for example, the pressure-sensitive adhesive is applied to a release film (separator, etc.) subjected to peeling treatment, the polymerization solvent is dried and removed to form the pressure-sensitive adhesive layer, and then a polarizer (or transparent protection) It is produced by a method of transferring to a film) or a method of applying the adhesive to a polarizer (or a transparent protective film), drying and removing a polymerization solvent, etc. to form an adhesive layer on the polarizer, etc. In addition, in application of the adhesive, appropriate Thus, one or more solvents other than the polymerization solvent may be newly added.

As the release film subjected to the release treatment, a silicone release liner is preferably used. In the process of forming the pressure-sensitive adhesive layer by applying and drying the pressure-sensitive adhesive of the present invention on such a liner, as a method of drying the pressure-sensitive adhesive, an appropriate and appropriate method may be employed depending on the purpose. Preferably, a method of overheating and drying the coating film is used. The heat drying temperature is preferably 40°C to 200°C, more preferably 50°C to 180°C, and particularly preferably 70°C to 170°C. By making heating temperature into said range, the adhesive which has the outstanding adhesive characteristic can be obtained.

As for the drying time, an appropriate, appropriate time may be employed. The drying time is preferably 5 seconds to 20 minutes, more preferably 5 seconds to 10 minutes, particularly preferably 10 seconds to 5 minutes.

As a formation method of the 1st adhesive layers 12 and 22, various methods are used. Specifically, for example, roll coating, kiss roll coating, gravure coating, reverse coating, roll brush, spray coating, dip roll coating, bar coating, knife coating, air knife coating, curtain coating, lip coating, die coater, etc. Methods, such as an extrusion coating method, are mentioned.

The thickness in particular of the 1st adhesive layers 12 and 22 is not restrict|limited, For example, it is about 1-100 micrometers. Preferably, it is 2-50 micrometers, More preferably, it is 2-40 micrometers, More preferably, it is 5-35 micrometers.

<Release film>

The first release films 11 and 21 protect the pressure-sensitive adhesive layer until put into practical use. As a constituent material of the release film, for example, plastic films such as polyethylene, polypropylene, polyethylene terephthalate, polyester film, porous materials such as paper, cloth, and nonwoven fabric, nets, foam sheets, metal foils, laminates thereof, etc. Although suitable thin leaf bodies etc. are mentioned, A plastic film is used suitably at the point which is excellent in surface smoothness.

The plastic film is not particularly limited as long as it is a film capable of protecting the pressure-sensitive adhesive layer, and for example, a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a polymethylpentene film, a polyvinyl chloride film, and a vinyl chloride film. A copolymer film, a polyethylene terephthalate film, a polybutylene terephthalate film, a polyurethane film, an ethylene-vinyl acetate copolymer film, etc. are mentioned.

The thickness of the 1st release films 11 and 21 is 5-200 micrometers normally, Preferably it is about 5-100 micrometers. If necessary, the separator may be subjected to mold release and antifouling treatment with a silicone-based, fluorine-based, long-chain alkyl- or fatty acid amide-based release agent, silica powder, or the like, or antistatic treatment such as coating type, mixing type, or vapor deposition type. In particular, by appropriately performing peeling treatment such as silicone treatment, long-chain alkyl treatment, or fluorine treatment on the surface of the release film, the releasability from the pressure-sensitive adhesive layer can be further improved.

<Manufacture of optical film set>

Next, the manufacturing method of a 1st optical film set and a 2nd optical film set is demonstrated. FIG. 2A is a schematic diagram showing a method of manufacturing the roll-shaped first optical film 1 . FIG. 2B is a schematic diagram showing a method of manufacturing the sheet-like first optical film 2 .

In FIG. 2A, the roll-shaped 1st optical film original fabric 5 of the structure in which the 1st release film, the 1st adhesive layer, the 1st optical function film, and the 1st surface protection film are laminated|stacked in this order is prepared. Then, from the 1st optical film original fabric 5, a 1st optical film is fed out, and it slit-processes to three strip|belt-shaped optical films by the predetermined width a using the slit cut part sc. The three strip|belt-shaped optical films by which the slit process was carried out are wound, respectively, and manufacture the 1st optical film in roll shape.

In this embodiment, although the slit process is carried out in three strip|belt-shaped optical films, it is not restrict|limited to this. Moreover, although the both ends e1 and e2 are trimmed (end trimmed) in this embodiment, either end may be trimmed, and neither end part does not need to be trimmed.

In FIG. 2B, the 2nd surface fed out from the 2nd surface protection film original fabric S25 to the 1st surface protection film 14 side of the roll-shaped 1st optical film 1 (corresponding to the 1st optical film original fabric). The protective film 25 is bonded by a bonding means (a pair of bonding rolls R1, R2), and the optical film original fabric S2 in which the 2nd surface protection film 25 was laminated|stacked is manufactured. Then, the optical film original fabric S2 on which the 2nd surface protection film 25 was laminated|stacked is all cut and processed at predetermined intervals b using the cutting means FC, and the 1st optical film 2 in sheetfed form ) is manufactured. The sheet-like 1st optical film 2 may be accommodated in a predetermined|prescribed accommodation part, and may be laminated|stacked on a carrier film. By the above method, a 1st optical film set can be manufactured.

As another embodiment, the process of winding the optical film original fabric (S2), the strip|belt-shaped 1st optical film is fed out from the optical film original fabric (S2), and it cuts at the predetermined space|interval b using the cutting means FC. It may be processed.

Moreover, as another embodiment, the adhesive layer 12, the 1st optical function film, and the 1st surface protection film are cut|disconnected at predetermined intervals by leaving the strip|belt-shaped 1st release film 11 after a slit process (half-cut). and forming a plurality of perforated lines may be further included.

(liquid crystal cell, liquid crystal display panel)

A liquid crystal cell is a structure in which the liquid crystal layer was sealed between a pair of board|substrates (1st board|substrate (viewable side) Pa, 2nd board|substrate (back surface) Pb) which are opposingly arranged. Although any type of liquid crystal cell can be used, in order to implement|achieve high contrast, it is preferable to use the liquid crystal cell of a vertical alignment (VA) mode, and in-plane switching (IPS) mode. A liquid crystal display panel is a thing by which the polarizing film was bonded on the single side|surface or both surfaces of a liquid crystal cell, and a drive circuit is built-in as needed.

(organic EL cell, organic EL display panel)

The organic EL cell has a structure in which an electroluminescent layer is sandwiched between a pair of electrodes. The organic EL cell can use arbitrary types, such as a top emission system, a bottom emission system, and a double emission system, for example. The organic EL display panel has a polarizing film bonded to one or both surfaces of an organic EL cell, and a driving circuit is incorporated as necessary.

<Remanufacturing using the first optical film set>

3 is a schematic diagram of a continuous manufacturing system of an optical display panel. In this embodiment, the roll-shaped 1st optical film 1 is used for manufacturing an optical display panel by a roll-to-panel system. The sheet-like first optical film 2 is judged to be a defective product among optical display panels manufactured using the roll-shaped first optical film 1, and the first adhesive layer, the first optical function film, and the first surface Used for remanufacturing an optical display panel having a configuration in which a first pressure-sensitive adhesive layer, a first optical function film, and a first surface protection film are laminated in this order on one side of an optical cell of an optical display panel from which a protective film has been peeled off do. Specifically, on one side of the optical cell from which the 1st adhesive layer 22, the 1st optical function film 23, and the 1st surface protection film 24 peeled, it is sheet-fed by a sheet-to-panel system. Peeling the first release film 21 from the first optical film 2 of the first adhesive layer 22, the first optical function film 23, the first surface protection film 24 and the second surface protection After bonding the film 25 in this order, the 2nd surface protection film 25 is peeled. In this embodiment, a liquid crystal cell is mentioned as an example as an optical cell, and a liquid crystal display panel is demonstrated as an optical display panel.

As for the roll-shaped 1st optical film 1, the 1st release film 11, the 1st adhesive layer 12, the 1st optical function film 13, and the 1st surface protection film 14 are laminated|stacked in this order, have. As shown in Fig. 1, the roll-shaped first optical film 1 has a width a, and has a width corresponding to the long side of the liquid crystal panel (a width substantially shorter than the long side of the liquid crystal cell P).

The manufacturing system of the liquid crystal display panel which concerns on this embodiment, the 1st conveyance part 81 which conveys the liquid crystal cell P to the 1st attachment part 64, and the liquid crystal cell P, as shown in FIG. It has the 2nd conveyance part 82 which conveys the liquid crystal cell P after affixing an optical film using the roll-shaped 1st optical film 1 on the 1st surface P1. Each conveyance part has several conveyance rollers R for conveying liquid crystal cell P by rotating centering around the rotation axis parallel to the direction orthogonal to a conveyance direction, and is comprised. Moreover, you may have and comprise an adsorption|suction plate etc. other than a conveyance roller.

(Liquid crystal cell transfer process)

From the accommodating part 91 which accommodates the liquid crystal cell P, the liquid crystal cell P is arrange|positioned in the 1st conveyance part 81 so that the 1st surface P1 may become a ceiling surface, and the conveyance roller R of It is conveyed to the 1st attachment part 64 by rotation.

(1st optical film feeding process, 1st optical film cutting process)

The strip-shaped first optical film 10 fed out from the roll-shaped first optical film 1 adsorbs and fixes the first release film 11 side, and the first release film 11 is cut by the cutting unit 61 . The strip-shaped pressure-sensitive adhesive layer 12, the strip-shaped first optical function film 13, and the strip-shaped first surface protection film 14 were left uncut to a predetermined size (according to the short side of the liquid crystal cell P). It is cut to length (length substantially shorter than the short side), and the cut-out part s is formed. As for the cutting|disconnection by the cutting part 61, the cutting|disconnection using a blade (cut|disconnection by the blade|wing to pull and cut|disconnect), and the cutting|disconnection by a laser device are mentioned, for example. Although an example of the cut-out part s after cut|disconnected is shown with the arrow of FIG. 3, in order to make description easy, the cut-out is drawn large on purpose. A nip roller (not shown) may be disposed on the upstream or downstream side of the cut portion 61 , and may be configured to convey the strip-shaped first optical film 10 . Moreover, nip rollers may be arrange|positioned at the upstream and downstream of the cut|disconnection part 61. As shown in FIG.

(Tension control process)

In the cutting treatment of the strip-shaped first optical film 10 and the attaching treatment at the rear end, in order to enable continuous treatment so that the treatment is not interrupted over a long period of time, and to adjust the relaxation of the film, the first tension An adjustment unit 62 is provided. The 1st tension|tensile_strength adjustment part 62 has a dancer mechanism using a weight, and is comprised, for example. A nip roller (not shown) may be arranged upstream or downstream of the first tension adjustment unit 62 , and may be configured to convey the first optical film 10 . In addition, nip rollers may be arrange|positioned on the upstream and downstream of the 1st tension|tensile_strength adjustment part 62 .

(Peeling process)

The 1st optical film 10 is wound around the 1st peeling part 63, and is inverted, and the 1st optical film 10 peels from the 1st release film 11. The 1st release film 11 is wound up by the 1st winding-up part 65 on a roll. The 1st winding-up part 65 has a roll and a rotation drive part, The 1st release film 11 is wound on a roll by a rotation drive part rotating a roll. Moreover, the nip roller which is not shown is arrange|positioned at the upstream or downstream of the peeling part 63, and the structure which conveys the 1st optical film 10 or the 1st release film 11 may be sufficient. Moreover, nip rollers may be arrange|positioned at the upstream and downstream of the peeling part 63. As shown in FIG.

(1st attachment process)

The 1st attachment part 64 conveys the liquid crystal cell P, the 1st optical film 10 from which the 1st release film 11 peeled to the 1st surface P1 of the liquid crystal cell P , attached through the first pressure-sensitive adhesive layer 12 . The first attachment portion 64 is composed of a pair of first rollers 64a and second rollers 64b. Either one may be a drive roller, the other may be a driven roller, and both rollers may be a drive roller. By sending the first optical film 10 and the liquid crystal cell P to the downstream while clamping the first optical film 10 and the liquid crystal cell P with a pair of first rollers 64a and second rollers 64b, the first optical film 10 is transferred to the liquid crystal cell It is attached to the first surface (P1) of (P). Liquid crystal cell P after sheet-fed 1st optical film 10 is affixed to 1st surface P1 of liquid crystal cell P is conveyed downstream by the 2nd conveyance part 82.

(1st inspection process)

The first inspection unit 70 optically inspects the liquid crystal cell P. The first inspection unit 70 is disposed on one side of the liquid crystal cell P, and a light source 71 that transmits light to the liquid crystal cell P, and the liquid crystal cell P is disposed on the opposite side of the light source, It has the 1st imaging part 72 which picks up the transmitted light image of the liquid crystal cell P. The first imaging unit 72 may be an area sensor or a line sensor. Moreover, the 1st inspection part 70 may have a 2nd imaging part (not shown) which images the reflected light image for test|inspecting the attachment position of the 1st optical film 10. As shown in FIG. The image captured by the first inspection unit 70 is image-analyzed by the first image analysis unit 51 . The control unit 50 controls the operation timing of each configuration of the continuous manufacturing system, and the like.

(1st judgment process)

Based on the result of having analyzed the image by the 1st image analysis part 51, the 1st determination part 52 determines whether liquid crystal cell P is a good product or a defective product. Examples of defective products include misalignment of adhesion and mixing of air bubbles. The liquid crystal cell P judged to be a defective product is collect|recovered by the 1st non-defective goods collection|recovery part 92. Liquid crystal cell P determined to be a defective article is collect|recovered by the 1st defective article collection|recovery part 93.

(1st defective film peeling process)

The process for remanufacturing the liquid crystal panel of a defective product into a liquid crystal panel of a good product is demonstrated using FIG. As shown in FIG. 4 , the first optical film 10 is removed from the liquid crystal cell P determined as a defective product by the first determination unit 52 . A removal process may be performed manually and may be performed with a peeling apparatus. Next, a description will be given of remanufacturing (sometimes referred to as "rework") by attaching the sheet-like first optical film 2 to the first surface P1 of the liquid crystal cell P using a sheetfed attaching device. .

(First reattachment process)

Next, in a sheet-to-panel system (for example, a sheet-fed attachment device), the sheet-like first optical film 2 from which the 1st release film 21 was peeled is the 1st optical film 10 by which it was judged defective. It affixes on the 1st surface P1 of liquid crystal cell P after this peeling. A conventional apparatus can be used as the sheet-fed apparatus. Reference is made to the sheet-like first optical film 2 in FIG. 1 .

(Peeling process of 2nd surface protection film)

After a 1st reattachment process, the 2nd surface protection film 25 is peeled from the 1st optical film 2 of sheet-wafer shape. A peeling process may be performed manually and may be performed with a peeling apparatus. Through the above process, it is possible to manufacture (remanufacture) a liquid crystal panel having the same laminated configuration as a liquid crystal panel manufactured by a roll-to-panel method.

In the above embodiment, although the optical film is attached to one side (first side P1) of the liquid crystal cell in a roll-to-panel method, it is not limited thereto. You may affix an optical film by a roll-to-panel system also about the other surface (2nd surface P2) of a liquid crystal cell.

In the said embodiment, although the 1st inspection process and the 1st judgment process were performed after a 1st attachment process, after affixing an optical film to the other surface (2nd surface P2) of a liquid crystal cell, inspection and determination may be done In judgment, the optical film judged as a defective product may be peeled from a liquid crystal cell, and you may stick to a liquid crystal cell by a sheet-to-panel system using a sheet-fed optical film.

(variant example)

In this embodiment, although it was demonstrated that the optical film set of a roll-form optical film and a sheet-fed optical film is used for the continuous manufacturing method of a liquid crystal display panel, it is not limited to this, It is not limited to the continuous manufacturing method of an organic electroluminescent display panel. You may use it.

In embodiment, although said optical film was used as a roll-shaped optical film, the structure of a roll-shaped optical film is not limited to this. For example, except a release film, you may use the thing (optical film which put the perforation line) by which the strip|belt-shaped optical film in which the some piercing line was formed in the width direction was wound.

In embodiment, although the strip|belt-shaped optical film was cut|disconnected (half-cut) at predetermined intervals in the width direction, from a viewpoint of improving a yield, the strip|belt-shaped optical film was cut in the width direction so as to avoid the fault part of the strip|belt-shaped optical film. may be cut (skip cut), or the optical film including the defective portion may be cut to a size smaller than a predetermined interval (optical cell size) (more preferably, to a size as small as possible).

In the embodiment, a horizontal rectangular liquid crystal cell and liquid crystal display panel have been described as examples, but the shape of the liquid crystal cell and the liquid crystal display panel is a shape having another pair of opposite sides and another pair of opposite sides. As long as it is not particularly limited.

1: Roll-shaped optical film
11: release film
12: adhesive layer
13: optical function film
14: first surface protection film
2: sheetfed optical film
21: release film
22: adhesive layer
23: optical function film
24: first surface protection film
25: second surface protection film

Claims (14)

The optical cell from which the said optical film was removed from the optical display panel which has an optical film in which an adhesive layer, an optical function film, and a 1st surface protection film are laminated|stacked in this order, and the optical cell in which the said optical film is provided on one side. A method of manufacturing an optical display panel in which a sheet-like optical film having the same configuration as the removed optical film is reattached to the one side of the
The release film is peeled from the sheet-like optical film in which the release film, the pressure-sensitive adhesive layer, the optical function film, the first surface protection film and the second surface protection film are laminated in this order, and through the pressure-sensitive adhesive layer, the optical cell a reattachment step of remanufacturing the optical display panel by attaching the sheet-like optical film to the one side;
and a second surface protection film removal step of removing the second surface protection film after the reattachment step. The method of claim 1 , further comprising a removal step of removing the optical film from the optical display panel based on a result of inspecting the optical cell to which the optical film is attached. The method of claim 1 or 2, further comprising an inspection step of inspecting the optical cell to which the optical film is attached. The strip according to claim 1 or 2, fed out from a roll-shaped optical film in which a strip-shaped optical film in which a release film, a pressure-sensitive adhesive layer, an optical function film, and a first surface protection film are laminated in this order is wound. A cutting step of cutting the optical film of the shape while leaving the release film in a direction orthogonal to the longitudinal direction of the optical film;
The method of manufacturing an optical display panel, further comprising an attaching step of attaching the optical film from which the release film is peeled to the one side of the optical cell through the pressure-sensitive adhesive layer. The optical film according to claim 1 or 2, wherein the release film, the pressure-sensitive adhesive layer, the optical function film, and the first surface protection film are laminated in this order, and the release film is removed to form cuts at predetermined intervals. The manufacturing method of the optical display panel which further includes the attachment process of adhering the said optical film from which the said optical film was drawn out from the roll-shaped optical film wound up and the said release film peeled to the said one side of the said optical cell through the said adhesive layer. . The roll-shaped optical film according to claim 1 or 2, wherein the release film, the pressure-sensitive adhesive layer, the optical function film, and the first surface protection film are laminated in this order;
A release film, an adhesive layer, an optical function film, a first surface protection film, and a second surface protection film are laminated in this order, further comprising the step of preparing an optical film set having a sheet-like optical film A method of manufacturing a display panel. The optical film according to claim 1 or 2, wherein the release film, the pressure-sensitive adhesive layer, the optical function film, and the first surface protection film are laminated in this order, and the release film is removed to form cuts at predetermined intervals. A roll-shaped optical film formed by winding,
A release film, a pressure-sensitive adhesive layer, an optical function film, a first surface protection film, and a second surface protection film are laminated in this order, further comprising the step of preparing an optical film set having a sheet-like optical film, optical, A method of manufacturing a display panel. The optical cell from which the said optical film was removed from the optical display panel which has an optical film in which an adhesive layer, an optical function film, and a 1st surface protection film are laminated|stacked in this order, and the optical cell in which the said optical film is provided on one side. It is a manufacturing system for an optical display panel in which a sheet-like optical film having the same configuration as that of the removed optical film is reattached to the one side of the
The release film is peeled from the sheet-like optical film in which the release film, the pressure-sensitive adhesive layer, the optical function film, the first surface protection film and the second surface protection film are laminated in this order, and the optical cell is passed through the pressure-sensitive adhesive layer. a reattachment unit for attaching the sheet-like optical film to the one side to reattach the optical display panel;
The manufacturing system of the optical display panel which has a 2nd surface protection film removal part which removes the said 2nd surface protection film after the process of the said reattachment part. The system for manufacturing an optical display panel according to claim 8, further comprising an optical film removal unit configured to remove the optical film from the optical display panel based on a result of inspecting the optical cell to which the optical film is attached. The system for manufacturing an optical display panel according to claim 8 or 9, further comprising an inspection unit for inspecting the optical cell to which the optical film is attached. The strip according to claim 8 or 9, fed out of a roll-shaped optical film in which a strip-shaped optical film in which a release film, a pressure-sensitive adhesive layer, an optical function film, and a first surface protection film are laminated in this order is wound. A cutting step of cutting the optical film of the shape while leaving the release film in a direction orthogonal to the longitudinal direction of the optical film;
The manufacturing system of the optical display panel which further has an attachment process of attaching the said optical film from which the said release film was peeled to the said one side of the said optical cell through the said adhesive layer. The optical film according to claim 8 or 9, wherein the release film, the pressure-sensitive adhesive layer, the optical function film, and the first surface protection film are laminated in this order, and the release film is removed and the cutouts are formed at predetermined intervals. The manufacturing system of the optical display panel which further has an attachment part which feeds out from the roll-shaped optical film formed by winding, and affixes the said optical film from which the said release film was peeled to the said one side of the said optical cell via the said adhesive layer. The roll-shaped optical film according to claim 8 or 9, wherein the release film, the pressure-sensitive adhesive layer, the optical function film, and the first surface protection film are laminated in this order;
An optical display, further comprising a manufacturing unit for manufacturing an optical film set having a sheet-fed optical film having a structure in which a release film, a pressure-sensitive adhesive layer, an optical function film, a first surface protection film and a second surface protection film are laminated in this order panel manufacturing system. The optical film according to claim 8 or 9, wherein the release film, the pressure-sensitive adhesive layer, the optical function film, and the first surface protection film are laminated in this order, and the release film is removed and the cutouts are formed at predetermined intervals. A roll-shaped optical film formed by winding,
An optical display, further comprising a manufacturing unit for manufacturing an optical film set having a sheet-fed optical film, wherein the release film, the pressure-sensitive adhesive layer, the optical function film, the first surface protection film and the second surface protection film are laminated in this order panel manufacturing system.

Images