TWI328112B - - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an inspection system for inspecting a sheet-like article which is recorded in a strip-shaped sheet-like article and which is marked at a defect position. C. Prior art 3 Background of the invention, as a strip-shaped sheet-like product, for example, a polarizing plate roll used in a liquid crystal display device is used. The procedure from the start of the strip-shaped polarizing plate roll to the punching of each of the 10 polarizing plates was carried out as follows. First, defects such as damage existing on the surface of the polarizing film roll are detected. When a defect is detected, the defect position is marked, and the polarizing plate roll is wound into a roll and stored. Although the polarizing plate as the final product has various sizes according to the specifications from the user, but since the polarizing plate roll can be shared, it is possible to mass-produce the polarizing plate roll in advance, and then, as needed, according to the needs (according to the respective users) Ordering Requirements) Blanking the desired size of the polarizer article from the polarizer roll. In addition, as a method of marking at a defect position, for example, JP-A-2002-303580 (refer to the patent application, the first drawing, the second drawing, the second drawing). In this prior art, a mark mechanism is used to add a damage mark at a position where a defect is detected. Specifically, a plurality of crease members disposed along the width direction of the sheet-like article are used, and a damage mark is added. In the case where a polarizing plate article is obtained, the polarizing plate roll wound into a roll is pulled out to punch out a polarizing plate article of a desired size. A marked article on polarizer 1328112 will be removed because it cannot be used as a final product. However, the method of inspecting the mark at the defect position has the following problems. That is, as described above, after the label is marked, 'when the sheet-like product is wound up to form a roll, when marking is performed, since a slight expansion occurs at the position where the mark is performed, when the mark is made, When rolling into a roll, it is possible to create new defects in other normal positions. Since no marking is made at this newly created defect location, it is possible to provide the defective product to the user. In addition, there are problems with material utilization degradation due to new defects. As a marking method, in addition to the method of adding a damage mark as described in the above, there is a method of printing a specific shape with ink, etc., but 'because the mark formed using the ink also has a thickness, in terms of generating new defects Still has not changed. In view of the above, it is an object of the present invention to provide an inspection method and inspection for a sheet-like product which can record defects existing in a strip-shaped sheet-like product without undesirably expanding defects. system. In order to solve the above problem, the inspection method of the sheet-like product of the present invention is characterized by having: 20 a program for detecting a defect of a strip-shaped sheet-like product, and recording position information of the detected defect in a sheet shape A program for the end portion in the width direction of the product, and a procedure for winding the strip-shaped sheet-like product in which the position information is recorded into a roll. The function and effect of the inspection method of the sheet-like product produced by such a configuration are as follows. First, the defect of the strip-shaped sheet-like product is detected, and the position information of the detected defect is recorded on the end portion in the width direction of the sheet-like product. Thereafter, a strip-shaped sheet-like product is wound to form a roll. Here, the positional information of the defect is recorded in the width direction end portion of the sheet-like article, and the width direction end portion is a region which is not used as a product. Therefore, even if the position information is recorded in an arbitrary manner at the end portion in the width direction, and the sheet-like product is wound into a roll, no new defects are produced in the area used as the final product. As a result, it is possible to provide a method of inspecting a sheet-like article capable of recording defects existing in a strip-shaped sheet-like product without undesirably expanding the defect. A preferred embodiment of the present invention includes a program for pulling out a strip-shaped sheet-like product from the roll, and a program for detecting the position information recorded at an end portion in the width direction of the sheet-like product, The program for marking the detected position information at the defect position, and the embodiment of the program for punching out each sheet-like product from the strip-shaped sheet product after the mark is performed. According to this configuration, the strip-shaped sheet-like product is pulled out from the reel, and the positional information recorded at the end portion in the width direction is detected. The mark is marked on the defect position based on the detected position information. Then, each of the sheet-like articles is punched out from the strip-shaped sheet-like product. Since each of the sheet-like articles can be obtained immediately after the marking is performed, the defects are not enlarged by the mark Z. As another preferable embodiment of the present invention, an embodiment in which the distance information between the defect and the end portion in the width direction is recorded as the position information can be cited. Although the defect of the sheet-like product exists somewhere in the width direction, the positional information is recorded on the end portion in the width direction. By recording the distance information between the defect and the end portion in the width direction as the position information, it is possible to easily determine the defect position. As another suitable embodiment of the present invention, an embodiment in which the Wei position information is recorded in the form of a bar code can be cited. Since the bar code sensor is commercially available when the bar code is read by recording with the bar code, it is advantageous in terms of cost. As still another preferred embodiment of the present invention, an embodiment in which the position information records distance information between the secret end and the end in the width direction in the form of bar code and number can be cited. By simultaneously recording distance information using numbers and bar codes, it is also easy to confirm the position of the defect with the naked eye. In order to solve the above problem, the present invention is characterized in that the present invention is characterized in that the present invention is characterized in that it includes a defect detecting means for picking up a defect of a strip-shaped sheet-like product, and a width of a position of the defect detected by the broken product. The defect recording mechanism at the direction end portion, and the four-sheet-shaped "cylinder-shaped sheet-like product in which the position information is recorded are wound into a roll, and the following is a preferred embodiment of the present invention. The device includes: 1328112 a mechanism for pulling out a strip-shaped sheet product from the reel, and a position information detecting mechanism for detecting the position information recorded at an end portion of the sheet-like product in the width direction, according to the detected position A five-marking mechanism for marking the defective position, and a punching mechanism for punching out each of the sheet-like products from the strip-shaped sheet-like product after the marking is performed. As another embodiment of the present invention, the above-mentioned The location information is recorded in the form of a barcode and the location information detecting mechanism is an implementation of the barcode 10 reader. The function and effect of the inspection system are as BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a configuration of an inspection system for a sheet-like product (bar code printing). 15 Fig. 2 is a schematic view showing the configuration of an inspection system for a sheet-like product (bar code reading). The figure is a flowchart showing the operation of the system. The fourth (A) to (E) diagrams are diagrams showing the defect recording method by another method. 20 [Embodiment] The detailed description of the preferred embodiment is performed as the system. The sheet-like product can be exemplified by a polarizing plate roll. The polarizing plate roll is formed into a long strip shape, so that polarizing plates of different sizes can be punched out from the film-shaped polarizing plate roll. »112 The polarizing plate roll N can be obtained by adhering, for example, a TAc film on the front and back sides of a pre-manufactured PVA film. It is necessary to detect the surface lands of the polarizing plate roll N which is formed into a multilayer structure. Defects (damage, foreign matter, etc.) The polarizer roll N is manufactured by a manufacturing method including the following procedure: that is, (A) is a polyethylene glycol which has been subjected to dyeing, crosslinking, and stretching treatment. film Dried to obtain a polarizer set program, ⑼ adhesive protective layer of the polarizer side or both sides procedures, (c) heat-treating program after adhesive.

Ιυ 15 20 / neck neck film dyeing, cross-linking, stretching and other treatments do not need: Do not: line ' can also be carried out at the same time, in addition, the order of each treatment can also be 'as a polyvinyl alcohol film, can also A real = polyethylene glycol film was used. In general, after the polyethylene glycol phase is dyed in a dichroic dye or a dichroic dye, it is dyed in a solution of 3 times to 7 Torr in a solution containing boric acid or borax. 'Re-drying after reading in the 'in the middle of the inclusion of the acid or the like, and extracting (4) 34 lines of stretching (secondary stretching is particularly desirable. Improving the polarization characteristics as the poly The vinyl alcohol polymer is saponified after being polymerized with ethylene vinegar, and the material of the monomer copolymerized with a small amount of unsaturated ketone and unsaturated ethyl acetate is used. Poly 6 readability Average polymerizability of monomers such as monomers

10 _, particularly limited 'A material of any degree of polymerization may be used, but 2' is more preferably 2_~ han. Further, the polyethylene polymer-based polymer is preferably at least 85 mol%, more preferably from 98 to 1%. Not limited to the thickness of the manufactured polarizer, although it is generally 5~(10), but there is a special reason for this. Regarding the method of adjusting the thickness of the polarizer, there is no one, and the tenter can be used. The drum is stretched or pressed in the usual way.

In addition, the adhesion treatment of the galvanometer and the transparent protective film as a protective layer is not particularly limited, for example, by means of an adhesive made of a glycol polymer or to a sulphuric acid or a pentane An adhesive made of a water-soluble crosslinking agent of a second alcoholic polymer such as melamine or oxalic acid is used. The adhesive layer is formed as a coating dry layer of an aqueous solution or the like, and when the aqueous solution is prepared, other additives or a catalyst such as an acid may be blended as needed.

As a protective film on the vehicle side or both sides of the polarizer, a suitable transparent film can be used. Among them, a film made of a polymer excellent in transparency, mechanical strength, thermal stability or moisture barrier property is preferably used. Examples of the polymer include an acetate resin such as cellulose triacetate, a polyester such as a polycarboester resin, a polyarylate or a polyethylene terephthalate, and a polyimine. Resin, poly-Maple resin, poly-mystery resin, polystyrene resin, polyolefin resin such as polyethylene, polypropylene, polyvinyl alcohol resin, polyvinyl chloride resin, polynorbornene Resin, polymethyl methacrylate resin, liquid crystal polymer, and the like. The film can also be produced by any of a casting method, a calendering method, and an extrusion method. Further, the polymer film described in JP-A-2001-343529 (W001/37007) 11 1328112, for example, contains (A) a thermoplastic resin having a substituted or/and an unsubstituted imino group in a side chain, And (B) a resin composition having a thermoplastic resin having a substituted or/and unsubstituted phenyl group and a nitrile group in a side chain. Specific examples thereof include a film comprising a resin composition of an alternating copolymer of isobutylene and N-fluorenyl maleic anhydride, and an acrylonitrile or styrene copolymer. As the film, a film made of a mixed product of a resin composition or the like can be used. "These films have a small phase difference and a small photoelastic coefficient, so that the unevenness caused by the deformation of the polarizing plate can be eliminated, and the moisture permeability is small. 'Therefore, it is also excellent in humidifying durability. 10 In addition, the protective film is preferably not colored. Therefore, it is preferable to use Rth = [(nx+ny)/2-nz].d (where 'nx, ny is the principal refractive index in the plane of the film, nz is the refractive index in the film thickness direction, and d is the film thickness) The phase difference in the film thickness direction is a protective film of -90 nm to +75 nm. By using the protective film having a retardation value (Rth) in the thickness direction of -90 nm to +75 nm, the coloring (optical coloring) of the polarizing plate caused by the protective film can be substantially eliminated. The retardation value (Rth) in the thickness direction is more preferably from _8 〇 nm to +60 nm, and particularly preferably from -70 nm to +45 nm. From the viewpoints of polarizing characteristics, durability, and the like, an acetic acid-based resin such as triacetate or the like, and a cellulose triacetate film which has been subjected to saponification treatment with a base on the surface 20 is particularly preferable. Further, when a transparent protective film is provided on both sides of the polarizing film, a transparent protective film made of a different polymer may be used on both the front and back sides. Though the thickness of the protective film is an arbitrary value, it is generally 5 μm or less, preferably 1 to 3 μm, and 12 1328112 is particularly preferably 5 to 200 μm for the purpose of thinning the polarizing plate. Further, when a transparent protective film is provided on both sides of the polarizing film, a transparent protective film made of a different polymer may be used on both the front and back sides. The transparent protective film may be a material which is subjected to a treatment for hard-coating treatment or anti-reflection treatment, for diffusion or prevention of adhesion or anti-glare, etc., as long as the object of the present invention is not impaired. The hard coat treatment is carried out in order to prevent damage to the surface of the polarizing plate, and for example, it is possible to use a suitable ultraviolet curable resin such as a hydrazine or the like to be cured on the surface of the transparent protective film, and to have good hardness and smoothness. The form of the protective film is formed into a shape of 10%. On the other hand, the anti-reflection treatment is carried out in order to prevent reflection of external light on the surface of the polarizing plate, and the object can be achieved by forming a conventional anti-reflection film or the like. Further, the adhesion prevention process is performed to prevent adhesion to an adjacent layer, and the anti-glare treatment is performed to prevent external light from being reflected on the surface of the polarization 15 sheet, thereby preventing recognition of light transmitted through the polarizing plate, and the like. The fine concavo-convex structure is formed on the surface of the transparent protective film by a suitable method such as a roughening method such as a sand blasting method or an embossing method or a method of blending transparent fine particles. Examples of the transparent fine particles include cerium oxide or aluminum oxide having an average particle diameter of 0.5 to 20 20 μm, titanium oxide or cerium oxide, tin oxide or indium oxide, cadmium oxide or cerium oxide, and conductivity can also be used. The inorganic fine particles may be organic fine particles composed of crosslinked or uncrosslinked polymer particles or the like. The amount of the transparent fine particles used is usually 2 to 70 parts by mass, particularly preferably 5 to 50 parts by mass, per 100 parts by mass of the transparent resin. 13 328112 For men, as an anti-glare layer with transparent particles, it is possible to use a transparent protective tape itself or to use a coating layer on the surface of a transparent protective layer. The batch glare layer can also serve as a diffusion layer (viewing angle compensation function, etc.) for diffusing the polarizing plate to transmit light and widening the viewing angle. Further, the anti-reflection layer or the anti-reflection layer, the diffusion layer, the anti-glare layer or the like may be provided as an optical layer composed of a sheet or the like provided with the enamel layer, and provided separately from the transparent protective layer. When the sheet-like product of the present invention is actually used, it is possible to use various optical layers as an optical film. The optical layer is not particularly limited, and for example, a hard coat treatment is performed on a surface of a polarizer to which the transparent protective film is not bonded (a surface on which the adhesive coating layer is not provided) Or a method of preventing reflection treatment, surface treatment for diffusion or prevention of adhesion or anti-glare, or laminating a liquid crystal layer for the purpose of viewing angle compensation or the like. In addition, it is also possible to use one or two or more reflective sheets or semi-transmissive sheets, and a phase difference plate (including a 1/2 or 1/4 wavelength plate (λ piece)/viewing angle compensation film for liquid crystal display 15 A method of forming an optical film in a device or the like. In particular, if the sheet-like article is a polarizing plate, it is suitably used as a reflective polarizing plate or a semi-transmissive polarizing plate formed by laminating a reflective sheet or a semi-transmitting reflecting sheet, and laminating a phase. An elliptically polarizing plate or a circularly polarizing plate formed by a difference plate, a wide-angle polarizing plate formed by laminating a viewing angle compensation layer or a viewing angle compensation film, or a polarizing plate formed by laminating a thin film for brightness improvement. The reflective polarizing plate is on a polarizing plate. The member in which the reflective layer is provided is a member for forming a liquid crystal display device or the like which is displayed by reflecting incident light from the recognition side (display side), and the light source such as a backlight can be omitted, so that it is easy to be used. The advantage of the thinning of the liquid crystal display device is 14 1328112. The formation of the reflective polarizing plate can be performed on one side of the polarizing plate by transparent protection or the like as needed. A method of forming a reflective layer made of a metal or the like is carried out in an appropriate manner. As a specific example of the reflective polarizing plate, a single surface of a transparent protective film which is subjected to matte treatment as needed is exemplified. A polarizing plate in which a reflective layer is formed by a foil or a vapor-deposited film made of a reflective metal such as aluminum, and a fine fine concavo-convex structure is formed on the transparent protective film by forming fine particles. The polarizing plate of the reflective layer of the fine concavo-convex structure. The reflective layer of the fine concavo-convex structure has the advantage that the diffused reflection can diffuse the incident light to prevent directionality or appearance, and can suppress unevenness of light and dark. Further, the transparent protective film containing fine particles has an advantage of being diffused when incident light and reflected light thereof are transmitted therethrough, thereby further suppressing unevenness in light and darkness, and forming a fine uneven structure reflecting the surface of the transparent protective film. In the case of the reflective layer of the fine concavo-convex structure, the film 15 can be completed by the following method, for example, by vacuum deposition, ion plating, or sputtering. In a suitable manner such as a vapor deposition method or a plating method, a metal is directly attached to the surface of the transparent protective layer. The reflective sheet may be formed in a transparent manner without being directly attached to the transparent protective film of the polarizing film. A reflective sheet formed by providing a reflective layer on a suitable thin film based on a film, etc., is used. Since the reflective layer is usually made of metal, the reflectance is prevented from being lowered by oxidation, and the initial reflection is maintained for a long period of time. From the viewpoint of the rate or the viewpoint of avoiding the additional protective layer, it is more preferable to use the reflective surface in a state covered with a transparent protective film, a polarizing plate, or the like. 15 1328112 There is also 'in the above, semi-transmissive polarization. The sheet can be obtained by forming a semi-transmissive reflective layer such as a half mirror which transmits light while reflecting light by a reflective layer. The semi-transmissive polarizing plate is usually provided on the back side of the liquid crystal cell, and can be formed into the following types. In the case of using a liquid crystal display device or the like in a relatively bright environment, the reflection is from a liquid crystal display device or the like. An image is displayed by recognizing the incident light on the side (display side), and an image is displayed using a built-in light source such as a backlight built in the back surface of the transflective polarizer in a relatively dark environment. That is, the semi-transmissive polarizing plate is useful in the formation of a liquid crystal display device or the like of the following types, that is, in a bright environment, energy of a light source such as a backlight such as 10 backlights can be saved, and a built-in light source can be used in a relatively dark environment. Very useful in the formation of liquid crystal display devices of the type. Next, an elliptically polarizing plate or a circularly polarizing plate in which a retardation plate is further laminated on a polarizing plate will be described. In the case where the linearly polarized light is changed to elliptically polarized light or circularly polarized light 'or the elliptically polarized light or the circularly polarized light is changed to the linearly polarized light, or the polarization direction of the linearly polarized light is changed, a phase difference plate can be used. In particular, as a phase difference plate which changes linearly polarized light into circularly polarized light or circularly polarized light into linearly polarized light, a so-called quarter-wavelength plate (also referred to as a λ/4 plate) can be used. A 1/2 wavelength plate (also called a λ/2 plate) is generally used to change the polarization direction of linearly polarized light. 20 The elliptically polarizing plate can be effectively used in the case of compensating (preventing) the coloring (blue or yellow) of the liquid crystal layer of the super twisted nematic nematic (STN) type liquid crystal display device due to birefringence, thereby performing the above-mentioned The situation of white and black coloring is shown. In addition, the polarizing plate for controlling the three-dimensional refractive index can also compensate (prevent) the coloring which occurs when the screen of the liquid crystal display device is viewed obliquely, and thus is ideally 16 1328112. The circularly polarizing plate can be effectively used for adjusting the color tone of an image of a reflective liquid crystal display device which displays an image in color, and also has a function of preventing reflection. Examples of the retardation film include a birefringent film formed by uniaxially or biaxially stretching a polymer material, an oriented film of a liquid crystal polymer, and a member for supporting an alignment layer of a liquid crystal polymer with a film. The stretching treatment can be carried out, for example, by a drum stretching method, a long gap stretching method, a tenter stretching method, a tubular stretching method, or the like. In the case of uniaxial stretching, the stretching ratio is generally about 1.1 to 3 times. The thickness of the phase difference plate is also not particularly limited, and is generally 10 to 200 μm, preferably 20 to ΙΟΟμιη. Examples of the polymer material include polyvinyl alcohol, polyvinyl butyral, polymethyl vinyl ether, polyhydroxyethyl acrylate, hydroxyethyl cellulose, hydroxypropyl cellulose, and methyl fiber. , polycarbonate, polyarylate, polyfluorene, polyethylene terephthalate, polyethylene naphthalate, 15 polyether oxime, polyphenylene sulfide, polyphenylene ether, polyallyl飒, polyvinyl alcohol, polyamine, polyimine, polyolefin, polyvinyl chloride, cellulose polymer or their binary, ternary various copolymers, graft copolymers, mixed polymers Wait. These polymer materials can be oriented (stretched film) by stretching or the like. In the above-mentioned liquid crystal polymer, for example, a main chain type or a side chain type polymer in which a conjugated linear atomic group (mesogene) which imparts liquid crystal alignment properties is introduced into a main chain or a side chain of a polymer is exemplified. . Specific examples of the main chain type liquid crystal polymer include a polymer having a structure in which the linear atomic group is bonded to a spacer portion imparting flexibility, and for example, a 17-direction polymerized liquid crystal polymer. , disc-shaped polymer or bile (tetra) type polymer. Specific examples of the side chain type liquid crystalline polymer include the following compounds, that is, 'there is a side bond skeleton of a polyphenol, a polypropylene ray, a polymethyl propyl hydrazine or a bismuth acrylate. The key has a linear atomic group portion composed of a para-substituted cyclic compound unit imparting nematic orientation, via a spacer formed of a reproducible atomic group. These liquid crystal polymers are treated by a method of rubbing a surface of a film such as polyacrylonitrile or polyvinyl alcohol formed on a glass plate, or a material of obliquely strontium oxide, or the like. On the orientation-treated surface, a solution of the liquid crystalline polymer is spread and heat-treated. The retardation plate may be, for example, a material having various wavelength plates or a material for compensating for coloring or viewing angle due to birefringence of the liquid crystal layer, or the like having a suitable phase difference corresponding to the purpose of use, or may be laminated in two or more layers. A phase difference plate controls a material having optical characteristics such as a phase difference. The compensating viewing angle film is a film for enlarging the viewing angle while observing the liquid crystal display face from a direction slightly inclined to the facet. The viewing angle compensation retardation plate is made of, for example, a material which supports an alignment layer such as a liquid crystal polymer on an oriented film such as a retardation film or a liquid crystal polymer, or a transparent substrate. Generally, a birefringent polymer film which is uniaxially stretched in the plane direction thereof is used as the phase difference plate, and a phase difference plate which is used as a viewing angle compensation film can be used as the phase difference plate. a birefringent polymer film which is subjected to biaxial stretching, a birefringent polymer or a tilt like a refractive index in the thickness direction which is uniaxially stretched in the plane direction thereof and which is also stretched in the thickness direction thereof Oriented film or the like biaxially stretched. As the oblique alignment film, for example, a material which is subjected to a stretching treatment or/and a shrinkage treatment of a polymer film under the action of a shrinkage force by heating after bonding a pure ray on a film, and a liquid crystal polymer can be used. A material that is oriented obliquely. The transfer polymer as the phase difference plate can be made of the same polymer as described in the above-mentioned retardation plate, and the rib can prevent the rib from being changed based on the change in the recognition angle formed by the phase difference caused by the liquid crystal cell. A suitable polymer for the purpose of coloring, etc., or expanding the visibility of a good visibility. Further, from the viewpoint of realizing a wide viewing angle with good visibility, it is preferable to use an optical layer composed of an alignment layer of a liquid crystal polymer, particularly an inclined alignment layer of a discotic liquid crystal polymer, using a cellulose triacetate film branch. The optically retarded phase difference plate of the anisotropic layer. The polarizing plate through which the polarizing plate and the brightness improving film are bonded together is provided on the back side of the liquid crystal cell. The brightness-improving film is a thin film that exhibits a characteristic that reflects a linearly polarized light of a specific polarization axis or a circularly polarized light of a specific direction when natural light is incident due to a backlight of a liquid crystal display device or the like, reflection from the back side, or the like. And let other light pass through. Therefore, the polarizing plate in which the redundancy improving film and the polarizing plate are laminated can cause light from a light source such as a backlight to be incident to obtain transmitted light of a specific polarization state, and light other than the specific polarized light state is not transmitted. Be reflected. Re-inverting the light reflected on the surface of the brightness improving film by a reflective layer or the like provided on the rear side thereof to be incident on the brightness improving film again, and partially or completely transmitting light as a specific polarized light state, thereby adding The light of the brightness-improving film is revealed, and polarized light that is hard to absorb is supplied to the polarizing mirror, and the amount of light that can be used for display of a liquid crystal display image or the like is increased from 1328112, and thus the brightness can be improved. In other words, when the light is incident from the back side of the liquid crystal cell without using the brightness improving film, the light having the polarizing direction that does not coincide with the polarizing axis of the polarizer is substantially biased by the light. The mirror absorbs and cannot pass through the polarizer. That is, although it differs depending on the characteristics of the polarizer used, about 5% of the light is absorbed by the polarizer. Therefore, the amount of light that can be utilized in liquid crystal image display or the like is reduced, resulting in darkening of the image. The brightness improving film is repeatedly operated such that light having a polarization direction that can be absorbed by the polarizer is not incident on the mirror of the polarized light 10, but is caused to be reflected on the brightness improving film, and further The reflection layer on the rear side or the like is reversed to cause the light to be incident on the brightness improving film again. Thus, the brightness improving film only changes the polarization direction of the light reflected and inverted between the two to pass through the polarizer. The polarized light in the polarized direction is transmitted while being supplied to the polarizing mirror, so that the backlight light can be effectively used in the display of the image of the liquid 15-crystal display device, so that the screen can be made brighter, and the brightness improving film can also be used. A diffusion plate is provided between the reflective layer and the like. The light in the polarized state reflected by the brightness improving film faces the reflecting layer or the like, and the diffusing plate is provided to uniformly diffuse the passing light while eliminating the polarized light state to become an unpolarized state. That is, the diffusing plate restores the polarized light to the original natural light state. The operation of the non-polarized light state, that is, the natural light state, is directed to the reflective layer or the like, reflected by the reflective layer or the like, and then incident on the brightness improving film again through the diffusion plate. By providing a diffusing plate between the brightness improving film and the reflective layer to restore the polarization of the polarization 20 1328112 to the original natural light state, it is possible to reduce the brightness of the display screen while reducing the unevenness of the brightness of the display surface. Provides a uniform and bright face. By providing the diffusing plate, it is possible to appropriately increase the number of repeated reflections of the primary incident light, and to provide a uniform bright display pupil by the diffusion work of the diffusing plate. As the brightness improving film, for example, a film which exhibits characteristics of transmitting linearly polarized light of a specific polarization axis and reflecting other light, such as a multilayer film of a dielectric material or a film multilayer laminated body having different refractive index anisotropy, can be used. An alignment film of a cholesteric liquid crystal polymer or a film having a liquid crystal layer of 10 or more on the film substrate, which exhibits reflection of any of left-handed or right-handed circularly polarized light to transmit other light. A suitable film such as a film of properties. Therefore, by using the brightness improving film of the type that transmits the linearly polarized light of the specific polarizing axis, the transmitted light is incident on the polarizing plate directly in the direction opposite to the polarization axis 15, and the suppression by the polarizing plate can be suppressed. While absorbing the loss, it is effectively transmitted. On the other hand, a brightness improving film of a type that transmits circularly polarized light such as a cholesteric liquid crystal layer can directly cause light to be incident on the polarizer, but it is preferable from the viewpoint of suppressing absorption loss. The circularly polarized light is linearly polarized by means of a phase difference plate, and is incident on the polarizing plate. Moreover, by using the (10) long film as the helper plate, it is possible to use a circularly polarized light as a linearly polarized light film which can function as a quarter-wavelength plate in a wide wavelength range such as a visible light region. It is obtained by using a light-colored light having a wavelength of 55 Gnm to have a phase difference of a quarter-wavelength phase. 2 21 1328112 10 15 20 A phase difference layer exhibiting other phase difference characteristics can function, for example, as a wavelength plate. The manner in which the phase difference layers overlap is formed by the polarizing plate and the difference layer. In addition, in the case of the cholesteric liquid crystal layer, it is also possible to combine materials having different reflection wavelengths to form an arrangement structure in which two layers are superposed, such as three or more layers. A member that reflects circularly polarized light in a wide range such as a visible light region can be used to obtain transmitted circularly polarized light of a wide wavelength range based thereon. Further, the sheet-like product (e.g., polarizing plate) of the present invention may be composed of a member in which a polarizing plate and two or more optical layers are laminated, as in the polarizing-separating polarizing plate. Therefore, it is also possible to combine the reflective polarizing plate or the semi-transmissive polarizing plate and the retardation plate to form a reflection elliptically polarizing plate or a semi-transmissive elliptically polarizing plate, and the like. The optical layer is laminated on the polarizing plate. The film is formed by sequentially laminating layers in a manufacturing process of a liquid crystal display device or the like. However, the polarizing plate which is laminated in advance to form an optical film is excellent in stability of a texture, assembly operation, and the like, and thus has It can improve the advantages of the manufacturing process such as the failure of the device. In the lamination, it is possible to use a wide range of viscous adhesives, and their optical means. The angle of the μ when the polarizer and other opticals are bonded. The shaft may be used in a suitable amount of ice according to the target phase difference characteristic or the like, or the polarizing plate of the present invention or the laminated optical structure may be provided. The adhesive layer which is used for bonding to other members such as a liquid crystal cell is not particularly limited, and may be formed of an acrylic or the like by an adhesive. #包包现象 or 'j caused by moisture absorption

22 1328112 It is preferable to prevent a decrease in optical characteristics caused by a difference in thermal expansion or the like, or warpage of a liquid crystal cell, and properties of an image display device which is excellent in quality and excellent in durability, and is preferably low in moisture absorption rate and excellent in heat resistance. Adhesive layer. Further, an adhesive layer or the like which exhibits light diffusibility by containing fine particles can be used. The adhesive layer may be provided on a desired surface as needed. For example, for a polarizing plate composed of a polarizer and a protective film, an adhesive layer may be provided on one or both sides of the protective film as needed. For the exposed face of the adhesive layer, in order to prevent contamination of the exposed face before it is provided for practical use, the separator may be temporarily adhered to cover it. Thus, it is possible to prevent it from coming into contact with the adhesive layer under normal processing conditions. As the separator, in addition to the above-described thickness conditions, for example, the following suitable materials can be used, that is, a suitable release agent for a plastic film such as a hydrazine or a long-chain alkyl group, a fluorine group or a molybdenum sulfide, as needed. A material which is coated with a suitable sheet such as a rubber sheet, a paper, a cloth, a nonwoven fabric, a mesh, a foamed sheet or a metal foil, or a laminate thereof. Further, in the present invention, in the polarizing plate, the transparent protective film, the optical film or the like which forms the polarizing plate described above, in each layer such as the adhesive layer, for example, a salicylate compound or a benzophenol may be used. A UV absorber such as a compound, a benzotriazole compound, a cyanoacrylate compound or a nickel complex salt compound 20 is treated to have an ultraviolet absorbing ability or the like. The sheet-like product of the present invention can be suitably used in the formation of an image display device such as a liquid crystal display device, an organic EL display device, or a PDP. The polarizing plate or the optical film of the present invention can be suitably used for formation of a device such as a liquid crystal display device of 23 1328112 or the like. The formation of the liquid crystal display device can be carried out in a conventional manner. In other words, the liquid crystal display device can be formed by suitably combining a liquid crystal cell, a polarizing plate and an optical film, and a lighting system added as needed, and incorporating the driving circuit, but in the present invention, 5 The polarizing plate or the optical film of the present invention is not particularly limited, and can be carried out in a conventional manner. For the liquid crystal cell, any type of liquid crystal cell such as a TN type, an STN type, or a π type can also be used. A suitable liquid crystal display device such as a liquid crystal display device in which a polarizing plate or an optical film is disposed on one side or both sides of a liquid crystal cell, or a device in which a backlight or a reflective sheet is used in an illumination system can be formed. At this time, the polarizing plate or optical film of the present invention may be disposed on one side or both sides of the liquid crystal cell. When the polarizer or the optical film is disposed on both sides, they may be the same material or different materials. Further, when forming a liquid crystal display device, one or two or more layers such as a diffusion plate, an anti-glare layer, a reflection preventing film, a protective plate, a prism array, a lens array sheet, a light diffusing plate, and a backlight may be disposed at a suitable position. Suitable parts such as lights. Next, an organic electroluminescence device (organic EL device) will be described. In the organic EL device, a transparent electrode, a 20 organic light-emitting layer, and a metal electrode are sequentially laminated on a transparent substrate to form an illuminant (organic electroluminescence). Here, the organic light-emitting layer is a laminate of various organic thin films, and for example, a laminar injection layer made of a triphenylamine derivative or the like is known to be a laminate of a light-emitting layer composed of a fluorescent organic solid such as onion. A laminate of the light-emitting layer and the electron injecting layer composed of a perylene derivative or the like, or a combination of the 24 1328112 empty six-injection layer, the light-emitting layer, and the electron injecting layer. The organic EL display device emits light according to the principle that a hole is applied to the organic light-emitting layer by applying a voltage to the transparent electrode and the metal electrode, and energy generated by the recombination of the holes and electrons is excited. When the fluorescent substance that is excited by the fluorescent substance returns to the ground state, it emits light. The intermediate composite mechanism is the same as that of a general diode, and it can also be inferred that the 'electricity' and the luminous intensity show a strong nonlinearity with respect to the rectifying property with respect to the applied voltage. In the organic EL display device, in order to take out at least one of the electrodes generated in the organic light-emitting layer, at least one of the electrodes must be transparent. A transparent electrode made of a transparent conductor such as indium tin oxide (IT〇) is usually used as an anode. On the other hand, in order to facilitate electron injection in the valley, it is important to use a material having a small work function in the cathode, and a metal electrode such as Mg_Ag or Al-Li is usually used. In the organic EL display device having such a configuration, the organic light-emitting layer is formed of an extremely thin film having a thickness of about 10 nm. Therefore, the organic light-emitting layer also transmits light substantially completely like the transparent electrode. As a result, when the light is incident from the surface of the transparent substrate and the transparent electrode and the organic light-emitting layer are not emitted, the light reflected on the metal electrode is again emitted to the surface side of the transparent substrate, so that the identification is performed from the outside. At the time, the display surface of the organic EL device is like a mirror surface. In an organic EL display device including an organic electroluminescence body as described below, a polarizing plate may be disposed on the surface side of the transparent electrode, and a phase difference plate may be disposed between the transparent electrode and the polarizing plate, and the above organic electroluminescent body 25 1328112

In the middle, a transparent electrode is provided on the surface side of the organic light-emitting layer that emits light by applying a voltage, and a metal electrode is provided on the back side of the organic light-emitting layer. X Since the retardation plate and the polarizing plate have a function of causing the light incident from the outside and reflected by the metal electrode to become polarized light, the polarizing action 5 has an effect of making the mirror surface of the metal electrode unrecognizable from the outside. In particular, when the retardation plate is formed by a quarter-wavelength plate and the angle between the polarization directions of the polarizing plate and the phase difference plate is adjusted to 7^4, the mirror surface of the metal electrode can be completely shielded. In other words, the external light incident on the organic EL display device is transmitted by the linearly polarized light component due to the presence of the polarizing plate. The linearly polarized light is generally converted into elliptically polarized light by the phase difference plate, and becomes circularly polarized when the phase difference plate is a 丨/4 wavelength plate and the angle of polarization of the polarizing plate and the phase difference plate is π/4. Light. The circularly polarized light is transmitted through the transparent substrate, the transparent electrode, and the organic thin film, and is reflected on the 15 metal electrode by 're-transmission of the organic thin film, the transparent electrode, and the transparent substrate' to be converted into linearly polarized light by the phase difference plate. Since the linearly polarized light is orthogonal to the polarization direction of the polarizing plate, the polarizing plate cannot be transmitted. As a result, the mirror surface of the metal electrode can be completely shielded. The sheet-like product (e.g., polarizing plate) of the present invention can be suitably used in the formation of various devices such as a liquid crystal display device. The liquid crystal display device can be formed such that the sheet-like product (for example, a polarizing plate) of the present invention is disposed on one side or both sides of the liquid crystal cell, and is transparent or reflective or transmissive or reflective. Construction of the device. Therefore, the liquid crystal cell forming the liquid crystal display device may be any. For example, a liquid crystal cell such as a simple matrix drive type liquid crystal cell typified by a thin film 26 1328112 transistor type may be used. Further, when a polarizing plate or an optical member is provided on both sides of the liquid crystal cell, these may be the same member or different members. In addition, when forming a liquid crystal display device, it can be set at an appropriate position! A suitable component such as a layer or two or more prism array sheets or lens array sheets, a light diffusing plate or a backlight. <Configuration of Inspection System> An appropriate embodiment of the inspection system for the sheet-like product of the present invention will be described below with reference to the drawings. Fig. 1 is a view showing a mechanism for printing a barcode in an inspection system of a sheet-like product. Fig. 2 is a view showing a mechanism for reading and marking a bar code in an inspection system. In order to detect the surface defect of the polarizing plate roll N, the second camera column 1 and the second camera column 2 are disposed. In the second camera train, three CCD cameras h are provided along the width direction of the roll material N of the polarizing plate 15, and in the second camera line 2, six coffee machine cameras are also provided along the width direction. The second camera row 2 is disposed on the downstream side of the i-th camera (four), and is arranged in two rows in order to reliably perform defect detection. The images obtained by the first and second camera rows 1 and 2 are sent to the image processing unit 3, and the defects existing on the surface or inside of the polarizing film roll N are detected using the image embedding technique. The image processing unit 3 can be constituted by software such as an image processing program. Of course, the image processing unit 3 can also be configured by hardware. The image processing unit 3 determines whether or not it is a defect and also determines the defect position. As described above, the first and second camera rows 1 and 2 and the image processing unit 3 can function as a defect detecting mechanism capable of detecting 27 defects in which a known strip-shaped sheet-like product can be used. In addition, the defect determination algorithm when using image processing program

The printer 6 (corresponding to the defect recording mechanism) is an ink jet printer. When a defect is found by the image-embedded portion 3 of Fig. 5, the strip is printed on the end portion (sheet surface) in the width direction of the polarizing plate roll material N. Moreover, the printing office can also use equipment other than inkjet. The printer driver unit 5 drives the printer 6 based on the command from the system control unit 4. That is, when the image processing unit 3 performs processing to detect a defect, the position information of the defect is printed (recorded) in the shape of a bar code !

In Fig. 1, the defect is represented by K, and the information of the distance L from the end portion of the width direction to the defect position is recorded by the bar code. Although the bar code B is enlarged, the distance information is printed on the lower side of the bar code B by the value (0815). This value is the distance L value expressed in mm units. In the figure, although the defect 15 κ is drawn to be large, in reality, it is often a defect of a size that cannot be confirmed with the naked eye. By printing the barcode B together with the number, the defect position can be confirmed with the naked eye. The bar code B is printed at the end in the width direction, but in terms of the printing position of the bar code B in the conveying direction, the phase of the printing position in the conveying direction is the same as the position of the defect. Therefore, if a defect is searched from the print leading end position of the bar code B in the width 20 direction, the defect existing at the recorded distance position can be found. The polarizing plate roll material N on which the barcode B is printed is wound into a roll 1 而 and stored. The printing of the barcode B is performed at the end in the width direction and is printed at a position which is not used as a product at the end. Therefore, even if the polarizing plate roll N on which the barcode B is printed is wound into the reel 10, the defect is not expanded to other normal areas due to the expansion of the bar code B printing position 28 1328112. The transport of the polarizer web N is carried out by means of a transport roller, and the transport roller can be disposed at a suitable position along the transport path. By means of the transport roller or the like, a mechanism for winding the polarizing plate roll N into a roll 1 can be configured. Further, a rotary encoder (not shown) that is linked to the conveyance of the polarizing plate roll N is provided to allow the time for acquiring images from the respective camera rows 1, 2 and the time for printing the barcode by the printer 6. Synchronize. Next, the configuration of a system for reading a barcode will be described using FIG. The polarizing plate roll N 10 is sequentially pulled out from the roll 1 by using a pulling mechanism such as the conveying roller 11. The bar code reader 7 (corresponding to the position information detecting means) reads the bar code 3 printed on the end portion in the width direction of the polarizing plate roll N. The barcode signal read by the barcode reader 7 is sent to the barcode analyzing unit 12. The marker 8 (equivalent to the marking mechanism) performs ‘ at the defect position based on the position information recorded on the barcode B. A plurality of markers 15 8 ' are disposed along the width direction of the polarizing plate roll member to operate only the marker 8 corresponding to the defect position. The marker drive unit 9 drives the marker 8 at the selected position to mark it according to an instruction from the system control unit 4. The mark M is a process for the defect position K, and as long as it is a shape recognizable by the naked eye, it can be used regardless of the shape and size of the heart. In addition to the printing by the ink, the marking may be carried out by a suitable marking method such as a method of adding a scar to the cutter. Although not shown in Fig. 2, a set of bar code readers is also provided on the opposite side of the web. This is because when the web is rolled an odd number of times on the way, the barcode is moved to the opposite side. And 29 1328112 ^ 'At this time' because the lack of (four) is in the position of the front end of the bar code = degree direction, it should be marked with the amount of = before. Length of redundancy On the downstream side of the marker 8, there is a _ _ & 1 from (four) xiang punching device (institution), ίο 15

Each of the polarizing plates 2 having the final product is punched out from the strip-shaped polarizing plate roll (^ in the punched polarizing plate, and the portion marked with the mark is not used as a product, Therefore, it is removed in the inspection program. By changing the punching die of the punching device, the polarizing plates 2G of various sizes can be punched out. That is, 'the polarizing plates 20 of various sizes can be obtained from the same polarizing plate roll cylinder ν. In the drawing, the polarizing plate roll material N is inspected in advance, and then it can be wound into a roll 1Q for storage. The present invention adopts a configuration in which the polarizing plate roll is used. The rotary encoder that conveys the motion linkage causes the time at which the barcode reading by the barcode reader 7 is synchronized with the time marked by the marker 8. <Action of the system>

Next, the operation of the system shown in Fig. 2 will be described using the flowchart of Fig. 3. First, a polarizing plate roll (#1) was continuously produced by adhering a TAC film on both sides of a PVA sheet. The polarizing plate roll N is conveyed at a constant speed by a transport roller disposed along the transport path. An image of the polarizing plate roll material N is obtained by the second camera line 1 and the second camera line 2, and is sent to the circular image processing unit 3 (#3). The image processing unit 3 performs image processing and analysis on the obtained image data, and determines whether or not there is a defect (#5). When a defect is detected, the printer 6 is driven to perform bar code printing (#7, 9, 11). In addition, the number is printed while the barcode is printed. After the printing of the barcode β is performed, the polarizer roll 30 is wound into a roll 10 and stored (#13). When the polarizing plate as a product is punched from the polarizing plate roll N, it is carried out in the following order. First, the polarizing plate roll material N is sequentially pulled out from the roll 1 。. The bar code reader 7 is used to detect whether or not a bar code Β (#π) is printed. When it is detected that a bar code is printed, it is read, and the bar code signal is sent to the bar code analyzing section 12 (#19). The barcode analyzing unit 12 analyzes the barcode and reads the defective position. The marker 8 corresponding to the defect position is operated and marked at the defect position (#23). After passing the position of the marker 8, each of the polarizing plates 20 (#25) is punched out by a punching device. Among the punched polarizing plates 20, the marked portions are removed from the production line. The time for removing the defective polarizing plate 2 from the production line can be appropriately set. For example, a bar code reader is also provided at a position where each of the polarizing plates 2 is taken out, and when a bar code is detected, display is performed by a buzzer or LEd' to temporarily stop the machine. The LEDs can be arranged in parallel along the width direction and only illuminate the LEd at the location where the defect exists. The operator only takes out the polarizing plate located at the position where the LED is lit and starts the machine again. This allows only the normal polarizer to flow to the next program. Further, it is also possible to employ a structure in which only a defective polarizing plate is automatically discharged to the outside of the production line by the machine. Alternatively, the punching operation of the punching device may be performed on the polarizing plate in the case of a defect. &lt;Comparison with other methods&gt; The defect recording method of the present invention is compared with other methods. Figure 4 is a diagram for a brief description of other methods. This is a method of displaying the defect position detected by the CCd camera on a paper in the form of a map. (B) is 1328112 A method of recording the position information of a defect on a recording device such as a paper or a flexible disk. (C) is a method of attaching a label to the end of a polarizing plate roll. (D) is a method of attaching a label to a defect position of a polarizing plate roll. (E) is a method of marking the defect position of the polarizing plate roll. Further, in any of the above five methods, after the defect information is recorded, the polarizing plate roll is wound into a roll and stored. The evaluation results are shown in Table 1. [Table 1] Evaluation item The present invention (A) (B) (C) (D) (E) Damage to the part of the qualified product due to the flaw 〇〇〇〇 XX The material utilization rate due to over-detection is lowered 〇〇 〇〇〇X mark position accuracy 〇 XX □ 〇〇 mechanical failure / maintenance 〇〇〇 〇 〇

As can be seen from Table 1, the method of the present invention is superior to other methods. The method (A) is represented as a map on paper 10 as another medium, and it is difficult to know where the defect is located. The same is true for method (B). Further, when recorded on a medium different from that of the polarizing plate, it is easy to cause an error (error in the conveying direction). This is because the polarizing plate roll is easily stretched or the like during being conveyed. So there are 15 questions about the accuracy of the recorded defect location. The method (c) cannot know where the defect exists in the width direction. In addition, there is a possibility that the label is pasted incorrectly. "Method (D), after being wound into a roll, will cause scratches on the normal area. The same is true for method (E). The method of the present invention is excellent in all evaluation items. &lt;Other Embodiments&gt; 32 1328112

(1) In the present embodiment, the number of camera rows for acquiring the image of the polarizing plate roll is two rows. However, the number of the cameras is not limited thereto, and may be one column or three columns or more. Further, the number of CCD cameras arranged in the width direction can be appropriately set. In addition, the defect detecting mechanism may not be a CCD 5 camera, and other types of sensors may be employed. The image taken by the CCD camera can be either a reflected light image or a transmitted light image. When a transmitted light image is used, a light source is disposed on the back side of the sheet, and a CCD camera is disposed on the surface side of the sheet. (2) In the present embodiment, the position information is recorded by the bar code, but the number 10 is not limited thereto. It is also possible to print in a form other than a barcode. When recording in a barcode, it is also possible to print without numbers. Barcodes can also be 1D, but 2D barcodes. In addition, as the information recorded in the barcode, it is also possible to record not only the location information but also any other information such as the manufacturing year and month. When recording with distance information, the unit of distance 15 can also use units other than mm. (3) In the present embodiment, a polarizing plate is exemplified as a sheet-like product, but the invention is not limited thereto. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the configuration of an inspection system for a sheet-like product 20 (barcode printing). Fig. 2 is a schematic view showing the configuration of an inspection system for a sheet-like product (bar code reading). Fig. 3 is a flow chart showing the operation of the system. Figures 4(A) to (E) are diagrams showing 33 1328112 using other methods of defect recording. [Description of main component symbols] 1...first camera column 9...marker drive unit la...CCD camera 10...roll 2...second camera column 11...transport roller 2a. .. CCD camera 12...bar code analysis unit 3...image processing unit 20...polarizer 4...system control unit B...bar code 5...printer drive unit K...defect 6.. .Printer M...Marker 7...Barcode Reader N...Polarizer Roller Cartridge 8...Marker 34

Claims (1)

1328m—April of the following year, the date of the amendment. The replacement of the material and the scope of the patent application: The inspection method for the seed/special product in April, 1999, includes: a procedure for detecting defects in the strip-shaped sheet product; The program for recording the position information of the detected defect in the width direction end portion of the sheet-like product; and the information of the strip-shaped sheet-like product winding the program for recording the position into a roll. 2. Inspecting the sheet-like product according to the first aspect of the patent application, the first step L of pulling out the strip-shaped sheet-like product from the roll is detected in the width direction of the sheet-like product. The process of the position 3 of the end portion is based on the position information detected by the user to enter the defect mark at the defect position, and after the mark is made, each of the sheet-like products is punched out from the strip-shaped sheet-like product. program of. 3. The position information in the inspection side of the sheet-like product described in the item i of the patent application section is recorded as the distance information from the end in the width direction. 4. The method of inspecting a sheet-like article according to item 1 of the patent application, wherein the position information is recorded in the form of a bar code. 5. According to the _ patent patent (4) item 1 (4) inspection of the sheet product 2 〇 method, the position information of the towel and the number of the two records of the relative position in the width direction. 6. A method for inspecting a seed/special product, comprising: a procedure of pulling out a strip-shaped sheet-like product wound into a roll; and detecting a defect 35 recorded at an end portion in a width direction of the sheet-like product a program for position information; a program for marking at a defect position based on the detected position information; and a program for punching out each sheet-like product from the strip-shaped sheet product after the marking is performed. 7. The method of inspecting a sheet-like article according to claim 6, wherein the position information records a distance information from the end portion in the width direction. 8. The sheet-like article according to claim 6 of the patent application. The checking method, wherein the location information is recorded in the form of a barcode. 9. The method of inspecting a sheet-like article according to the sixth aspect of the invention, characterized in that, as the position information, distance information of the end portion in the width direction is recorded in two forms of a bar code and a number. The inspection system for a sheet-like product includes: a defect detecting mechanism that detects a defect of a strip-shaped sheet-like product; and records position information of the detected defect in an end portion in a width direction of the sheet-like product a defect recording mechanism; and a winding mechanism for winding a strip-shaped sheet-like product on which the position information is recorded into a roll. 11. The inspection system of the sheet-like product according to the first aspect of the patent application of the first aspect of the present invention further includes: a pull-out mechanism for pulling out a strip-shaped sheet-like product from the reel; and detecting the recording on the sheet-like product a position information detecting mechanism for the position information at the end portion in the width direction; 1328112, a marking mechanism for marking the defect position based on the detected position information; and punching the strip-shaped sheet product after performing the marking The punching mechanism of each sheet-like product is cut out. The inspection system for a sheet-like article according to claim 11, wherein the position information is recorded in the form of a bar code, and the position information detecting mechanism is a bar code reader. 13. An inspection system for a sheet-like product, comprising: a pull-out machine 10 for pulling a strip-shaped sheet-like product wound into a roll, and measuring the end portion in the width direction of the sheet-like product a position information detecting mechanism for position information of the defect; a marking mechanism for marking the defect at the defect position based on the detected position information; and 15 punching out each sheet from the strip-shaped sheet product after performing the marking The punching mechanism of the shaped product. 14. The inspection system of a sheet-like article according to claim 13, wherein the position information is recorded in the form of a bar code, and the position information detecting mechanism is a bar code reader. 20. A strip-shaped sheet-like product, which is a strip-shaped sheet-like product inspected by the inspection method according to the first aspect of the patent application, and records the position information of the detected defect in the width direction end. After the part, it is wound into a roll. 16. A sheet-like product, which is a sheet-like product inspected by the inspection method described in the above-mentioned Japanese Patent Application No. 1 1328112, and is based on the position information recorded at the end portion in the width direction of the strip-shaped sheet-like product. After marking at the defect position, the strip-shaped sheet-like product is separately punched out. A sheet-like product obtained by laminating at least one optical layer on a sheet-like article according to item 16 of the patent application. 18. An image display apparatus comprising the sheet-like product according to claim 16 of the patent application. An image display apparatus comprising the sheet-like product according to claim 17 of the patent application.