CN101281258A - Optical film products and method for producing optical film products - Google Patents

Abstract

The present invention provides a optical film body structure for affirming a axis direction of a light axis easily and marking without effecting examination in defect inspection and manufacturing method of the optical film body.The optical film body is a formed optical film body overlapping a surface protective film for protecting the optical film layer surface on the optical film layer of the light axis, which is characterized in that: under the situation of forming light axis information related to the light axis by printing, the printed light axis information being namely a printing forming object, and printing density at perimeter part of the printed forming object is smaller than that inside part of the printing forming object.

Description

The manufacture method of optically thin film body and optically thin film body

Technical field

The present invention relates to the optically thin film body that forms at surface protective film, the manufacture method that reaches this optically thin film body with this optical thin film laminar surface of stacked guard on the optical thin film layer of optical axis.

Background technology

The optically thin film body that forms at the surface protective film with this optical thin film laminar surface of stacked guard on the optical thin film layer of optical axis is known.As this optical thin film layer, for example have, be used for polaroid, polarizer, and the duplexer of polaroid and polarizer etc. of liquid crystal indicator.In addition, surface protective film is the member that is provided with of surface for the protection optical thin film layer, and it is according to the mode that can peel off when being encased in liquid crystal indicator etc., is fitted on the surface of optical thin film layer by bonding agent etc.

In addition, sometimes with the optical thin film laminar surface of described surface protective film opposition side on be fitted with the thin layer that is called as barrier film.The same surface with the protection optical thin film layer with surface protective film of described barrier film is a purpose, also protects the bonding coat that is used for fixing liquid crystal indicator simultaneously.Even this bonding coat also is maintained at the optical thin film laminar surface after having peeled off barrier film.

Described optical thin film has optical axis, as described optical axis, for example forms 1 spool the optical axis parallel with the draw direction of optical thin film.The direction of principal axis of described optical axis is staggered when being arranged at liquid crystal indicator; can not bring into play function as liquid crystal indicator; manage thus on the surface of the surface protective film of optical thin film layer to wait direction of principal axis enforcement mark, so that judge described direction of principal axis easily to optical axis with the marking (stamp).But when implementing mark, because of being extremely low by manually operating operating efficiency with the marking etc.When particularly surface protective film is provided with lift-off processing layers such as silicone layer, need be with the operation to the wiping of lift-off processing layer such as ethanol, so operating efficiency worsens more.And the ink setting of the marking is slow, thus after embossed marks, need to place barrier paper etc., also unfavorable economically.

In addition, in order to judge easily the direction of principal axis of optical axis, be formed on method on the surface protective film as the marking that will represent optical axis direction, known have a patent documentation 1.This patent documentation 1 has been put down in writing the axial method that stamps optical axis by using ink jet printer to replace artificial impression note operation on surface protective film.

In addition, the known liquid crystal that disposes the identification marking that is made of UV coating (be used to discern optical axis etc. sign) on surface protective film is with optical thin film (patent documentation 2).In this patent documentation 2, put down in writing following content: for when the polarizing film under visible light is carried out quality check or to polarizing film being configured in liquid crystal display cells in the liquid crystal cells when carrying out quality check, identification marking does not hinder inspection, uses UV coating to form identification marking.In addition, when judging optical axis axial, irradiation black light makes UV coating luminous, thereby recognizes identification marking reliably.

[patent documentation 1] spy opens the 2003-14934 communique

[patent documentation 2] spy opens flat 10-221685 communique

But in the above-mentioned patent documentation 1; use sensor to detect the polaroid of the band protective film of the preliminary dimension of transporting from the upstream; according to testing result; in next operation, stop transporting with the polaroid of protective film; and use the surperficial enterprising row labels of ink jet printer at protective film, the position of mark is defined in the lettering scope of ink-jet.Owing to need judge the direction of principal axis of optical axis simply, therefore situation viewpoint long from the lettering activity duration and production efficiency such as a plurality of mark positions is set sees it is not preferred.On the other hand, be provided with under the situation of a plurality of ink jet printers, from its cost of equipment, the viewpoint of area is set, not preferred.

In addition, this invention be will cut into preliminary dimension the polaroid of band protective film as object, do not have to consider the situation that the blank (for example, count more than the 10m volume base) for the polaroid of the band protective film of long size is marked.In the time of to volume base mark optical axis axial, if directly adopt patent documentation 1 disclosed structure, then the viewpoint from production efficiency, manufacturing cost is not preferred.

In addition; under the situation of patent documentation 2; UV coating is used for mark; but when being printed on the surface protective film; as shown in Figure 5; after the warning triangle part drying; under visible light, become white or frosted glass and transfer such opaque shape (being oblique line among Fig. 5); therefore can simply recognize; though this (for example hinders in large-sized defective; bubble; foreign matter etc.) do not constitute obstacle in the inspection, but in nearest high precision; in the high-quality requirement, for example must check out the defective of 80 μ m～150 mu m ranges; thereby the whitening of UV coating also becomes the obstacle of defect inspection, and strong hope makes moderate progress.In addition, even use transparent UV coating as UV coating, when printing on surface protective film, labeling section branch becomes white and is recognized simply, can not check out the defective that overlaps in vertical direction with mark part reliably.

Summary of the invention

The present invention has used for reference above-mentioned actual conditions and has finished, its goal of the invention provide a kind ofly have the direction of principal axis that can easily confirm optical axis, mark can not influence the optically thin film body of checking this spline structure and the manufacture method of this optically thin film body in defect inspection simultaneously.

For solving above-mentioned problem, further investigate, its result has finished following invention.Promptly; optically thin film body of the present invention is to form at the surface protective film with this optical thin film laminar surface of stacked guard on the optical thin film layer of optical axis; wherein; passing through printing; in forming on the described surface protective film under the situation of the optical axis information relevant with described optical axis; the optical axis information that this is printed is promptly printed the formation thing, and the printing density at its peripheral position is formed littler than the printing density of the inside of this printing formation thing.

The action effect of described structure is as follows.Promptly; at least be laminated with optical thin film layer with optical axis and the surface protective film of protecting this optical thin film laminar surface on the optically thin film body, between this optical thin film layer and surface protective film, be formed with (printing forms thing) optical axis information relevant with optical axis through printing.Optical axis information is printed (comprising lettering) in the surface protective film side.Its reason is: surface protective film for example when being installed in liquid crystal indicator, can be stripped from from optical thin film layer, can not bring into play function as display device etc. if optical axis information remains in the optical thin film layer.In addition; be printed on the optical axis information on the surface protective film; be present between surface protective film and the optical thin film layer by bonding agent; therefore the formation thing of optical axis information becomes its state that is surrounded by the bonding agent layer on every side; thereby in the outward appearance that detects by an unaided eye, can not influence defect inspection.

Particularly, the peripheral end thickness that makes printing form thing forms littler than the inner thickness of this printing formation thing, and the interface that above-mentioned thus adhesive phase and printing form between the thing can showy and not influence visual examination.Therefore, clear dope, fluorescent paint, UV coating etc. form optical axis information even for example use, and also can make optical axis information not influence defect inspection when confirming optical axis information, carry out defect inspection accurately.

In addition, optically thin film body both can be the object that is cut to preliminary dimension, also can be the blank of long size.In addition, optical thin film is the film with optical axis, can be polaroid, polarizer and complex thereof.In addition, also can be provided with the polaroid protective seam (film) of protection polaroid in the polaroid.In addition, " defective " be meant as product and do not wish the defective that exists, for example is the surface of optical thin film layer or inner foreign matter, dirt, wound, knick, bubble etc.

In addition, as the suitable embodiment of the invention described above, the print thickness that preferably makes described printing form thing forms internally and reduces gradually to peripheral end.The central section configuration that printing forms thing can constitute for example chevron shape, trapezoidal shape, perhaps triangle.In addition, form internally under the situation about reducing gradually to peripheral end in the print thickness that makes described printing form thing, this reduces gradually and for example constitutes straight line or curve-like.

According to these structures, the interface that above-mentioned adhesive phase and printing form between the thing is unshowy, does not influence visual examination.

In addition, suitable embodiment as the invention described above, have following feature: form under the littler situation of the density of the printing inside that forms thing than this printing in the printing density that makes printing form the peripheral position of thing, the picture element density that printing forms the peripheral position of thing constitutes littler than the picture element density of this printing formation thing inside.

According to said structure, it is littler to make the picture element density at the peripheral position of printed article form the picture element density of inside of thing than this printing, and thus, for example can make printing form interface between thing and the adhesive phase becomes unshowyly, does not influence visual examination.

In addition, suitable embodiment as the invention described above, have following feature: form under the littler situation of the printing density of the inside that forms thing than this printing in the printing density that makes printing form the peripheral position of thing, the Pixel Dimensions at the peripheral position of printed article constitutes littler than the Pixel Dimensions of this printing formation thing inside.

According to above-mentioned formation, it is littler to make the Pixel Dimensions at the peripheral position of printed article form the Pixel Dimensions of inside of thing than this printing, and thus, for example can make printing form interface between thing and the adhesive phase becomes unshowyly, does not influence visual examination.

In addition, as the suitable embodiment of the invention described above, preferably use the coating that contains fluorophor that optical axis information is printed on the surface protective film and form.Can use uviol lamp (blackout) to carry out affirmation simply thus to optical axis information.Fluorophor is by the irradiation luminous material of ultraviolet ray, and it is had no particular limits, and can be that inorganic matter also can be organic class material.The coating preferably clear look that contains fluorophor.Resin as fluorescent paint is used for example can use polymethacrylate, vinylite, alkyd resin etc.

In addition, the manufacture method of other optically thin film body of the present invention is the manufacture method of the optically thin film body that forms at the surface protective film with this optical thin film laminar surface of stacked guard on the optical thin film layer of optical axis, wherein comprises at least:

Printing process, the printing optical axis information relevant on described surface protective film with described optical axis; With

Bonding process will be printed in described printing process in the surface protective film and the applying of described optical thin film layer of optical axis information, fits according to the mode that this optical axis information is present between surface protective film and the optical thin film layer,

In described printing process, the optical axis information that this is printed is promptly printed the printing density that forms its peripheral position of thing and is formed that to form the printing density of inside of thing than described printing littler.

The action effect of described structure is as follows.That is, manufacture method of the present invention comprises at least: printing process, the printing optical axis information relevant with described optical axis on surface protective film; And bonding process, will in printing process, be printed in the surface protective film and optical thin film layer applying of optical axis information, fit according to the mode that this optical axis information is present between surface protective film and the optical thin film layer.After making optically thin film body, used the marking, ink jet printer etc. on surface protective film, to form optical axis information in the past; so non-constant of operating efficiency; but the present invention can improve operating efficiency significantly by optical axis information is printed on the surface protective film in advance.In addition, because be that optical axis information is printed on structure on the surface protective film in advance, particularly be effective in the situation of the optically thin film body of making long size shape.In addition, as printing process,, can improve print speed printing speed and reduce manufacturing cost by adopting continuous mode of printing (for example using edition mode of printing continuously of revolving roll shape).In addition, can eliminate the mistake that the people by marking operation causes.In addition, especially as printing process, adopted the printing density at the peripheral position that makes printing formation thing to form the littler method of printing density that forms the inside of thing than this printing, thereby made by the optically thin film body performance of this manufacture method manufacturing and the same action effect of optically thin film body of above-mentioned record.

Description of drawings

Fig. 1 is the key diagram of optically thin film body,

Fig. 2 is the key diagram of a routine embodiment of optical axis information,

Fig. 3 is the key diagram of a routine embodiment of the printing of the optical axis information section configuration that forms thing,

Fig. 4 is the key diagram that forms the picture element density of thing about the printing of optical axis information,

Fig. 5 is the key diagram about in the past the mark that forms on optically thin film body.

Embodiment

Below, for suitable embodiment of the present invention, be elaborated with reference to suitable accompanying drawing.Fig. 1 is an example of optically thin film body.Fig. 2 is a routine embodiment of optical axis information.Fig. 3 is the key diagram that forms the section configuration of thing about the printing of optical axis information.

＜optically thin film body 〉

Optical thin film layer, for example by the polaroid with optical axis, polarizer, and their duplexer constitute.Optically thin film body shown in Figure 1 is made of polaroid, the barrier film (separator) that is provided with on the surface protective film that is provided with on the face of polaroid and another face at polaroid, and described polaroid is made up of polariscope and the polariscope protective seam that forms on its two sides.

Surface protective film is the film that has the adhesive phase of light fissility on a face of the base film that is made of plastic sheeting, and the adhesive phase of described light fissility strippingly is fitted on the polaroid surface.

Base film for surface protective film has no particular limits, and for example can preferably use biaxially oriented films such as polypropylene or polyester.Though the thickness of base film has no particular limits, being fit to is about 10～200 μ m.

Be present in the bonding agent of the adhesive phase between surface protective film and the polariscope protective seam for formation,, for example can use, acrylic compounds, synthetic rubber class, any bonding agent in the rubber-like though be not particularly limited.Wherein preferably according to forming the acrylic adhesives of control bounding force easily.In the bonding agent, can suitably use crosslinking chemical, tackifier, plastifier, filling agent, antioxidant, ultraviolet light absorber, silane coupling agent etc. as required.When forming adhesive phase, can be by transfer printing, directly print method, coetrusion etc., on surface protective film or polaroid, form adhesive phase.Thickness (dry film thickness) for adhesive phase has no particular limits, normally about 5～50 μ m.

In addition; be set at the bonding agent of the bond layer between polariscope and the polariscope protective seam as formation; for example can use the bonding agent that constitutes by vinyl alcohol polymer, or the bonding agent that constitutes by the water-soluble cross-linker of the vinyl alcohol polymer of boric acid or borax, glutaraldehyde, melamine, oxalic acid etc. at least.The bond layer of described bonding agent can be formed by coating drying layer of aqueous solution etc., but when preparing its aqueous solution, can be used other adjuvant or catalyzer such as acid as required.

The structure of general polaroid as shown in Figure 1, polariscopic two sides is provided with the polariscope protective seam.On a face of polariscope protective seam, adhesive phase can be set, and the barrier film of this adhesive phase of protection can further be set, this adhesive phase is used for the polaroid of fitting on the glass substrate that constitutes liquid crystal indicator.

Polariscope is not particularly limited, can uses various polariscopes.As polariscope, can be exemplified as on the hydrophilic macromolecule films such as dividing the saponification film at polyvinyl alcohol film, part dimethoxym ethane polyvinyl alcohol film, ethylene-vinyl acetate copolymer pastern the material of unilateral stretching behind the bitintability material of absorption iodine or bitintability dyestuff; Polyenes such as the desalination acid treatment thing of the processed thing of polyvinyl alcohol (PVA) or Polyvinylchloride are oriented film etc.There is no particular limitation to these polariscopic thickness, but be generally about about 5～80 μ m, but be not limited thereto, in addition, to adjusting the method for polariscopic thickness, also do not limit especially, can use common methods such as tentering device, rolling stretching or calendering.

Wherein, be fit to use and adsorb and to be orientated the polariscope of bitintability material (iodine, dyestuff) behind the polyvinyl alcohol film stretching.The dyeing of polyvinyl alcohol film, each processing crosslinked, that stretch there is no need to carry out respectively, can carry out simultaneously, and in addition, each order of handling also can be arbitrarily.In addition, as the polyvinyl alcohol film, also can use the polyvinyl alcohol film of having implemented swelling treatment.In general, polyvinyl alcohol is thin film dipped in the solution that contains iodine or bitintability pigment, make thin film adsorbs iodine or bitintability pigment, the dyeing afterwash, in the solution that contains boric acid or borax etc., carry out uniaxial tension again with 3～7 times of stretching ratios, dry afterwards.After in the solution that contains iodine or bitintability pigment, stretching, in the solution that contains boric acid or borax, further stretch (secondary drawing) again, dry afterwards, can improve the orientation of iodine like this and the degree of polarization characteristic is improved, therefore preferred especially.

As described polyvinyl alcohol based polymer, for example can enumerate make the vinyl acetate polyisocyanate polyaddition laggard gone material that saponification handles, on vinyl acetate copolymerization a spot of unsaturated carboxylic acid, unsaturated sulfonic acid, cationic monomer etc. can copolymerization the material etc. of monomer.Though the average degree of polymerization of polyvinyl alcohol based polymer is not particularly limited, can use the material of any degree of polymerization, preferred more than 1000, more preferably 2000～5000.In addition, the saponification degree of polyvinyl alcohol based polymer preferably more than 85mol%, more preferably 98～100mol%.

Polarizer protection film as being located at polariscopic one-sided or both sides can use the suitable transparent film.Wherein, the preferred film of making by good polymkeric substance such as the transparency or physical strength, thermal stability or moisture shieldings that uses.As this polymkeric substance, can enumerate as acetate esters resins such as cellulose triacetates, polyester resins such as polycarbonate resin, polyarylate, polyethylene terephthalate, polyolefin resin, polyvinyl alcohol resin, polyvinyl chloride resinoid, polynorbornene resinoid, polymethylmethacrylate resinoid, liquid crystal polymers etc. such as poly-imines resinoid, polysulfones resin, polyether sulfone resin, polystyrene resins, tygon, polypropylene.Film also can be used any means manufacturing in casting, rolling process, the extrusion molding.

In addition, open the thin polymer film of 2001-343529 communique (WO01/37007) record the spy, can be exemplified as comprise (A) side chain have replace and/or not substituted imido thermoplastic resin and (B) have the resin combination of the thermoplastic resin of replacement and/or unsubstituted phenyl and itrile group at side chain.As concrete example, can be exemplified as and contain by the contract film of resin combination of alternating copolymer that imines forms and acrylonitritrile-styrene resin of isobutylene and N-methyl maleic anhydride.As film, the film that can use mixing extruded product by resin combination etc. to constitute.This film phase differential is little, and photoelastic coefficient is little, therefore can eliminate that distortion by polaroid causes unequal problem, and because moisture permeability is little, so the humidification excellent in te pins of durability.

In addition, the polariscope protective seam does not preferably have painted as far as possible.Therefore; preferably use with Rth=[(nx+ny)/2-nz] d is (wherein; nx, ny are the principal refractive indexs in the thin film planar, and nz is the refractive index of film thickness direction, and d is a film thickness) phase difference value of the film thickness direction of expression for-90nm～+ protective film of 75nm.Phase difference value (Rth) by using this thickness direction for-90nm～+ protective film of 75nm, can roughly eliminate painted (optical clouration) of the polaroid that causes by protective film.Thickness direction phase difference value (Rth) more preferably-80nm～+ 60nm, preferred especially-70nm～+ 45nm.

From aspects such as polarized light property and permanance, acetates resins such as preferred cellulose triacetate especially preferably carry out the cellulose triacetate that saponification was handled with the surface with alkaline matter.

The thickness of polariscope protective seam can be arbitrary value, but in general, for the purposes such as slimming of polaroid, is made as below the 500 μ m preferred 1～300 μ m, preferred especially 5～200 μ m.When the polariscope protective seam of transparent membrane is set in the both sides of polarizing film, can use the transparent membrane that constitutes by different polymkeric substance on its two sides.

Only otherwise damage purpose of the present invention, the polariscope protective seam also can be implemented that dura mater (hard-coat) is handled, antireflection is handled, anti is handled, with diffusion or anti-dazzle be the material that purpose is handled.Dura mater handle to be for what prevent from the damage on polaroid surface etc. is implemented, for example can utilize that additional the grade by suitable ultraviolet curing resin modes that form, that have the curing tunicle of good hardness and slickness etc. such as silicones forms on the surface of transparent protective film.

On the other hand, it is that purpose applies that antireflection is handled with the external light reflection that prevents the polaroid surface, can reach by the formation of existing antireflection film.In addition; anti is to prevent that the driving fit with adjoining course from being that purpose applies; non-glare treated is to prevent that outer light from hindering polaroid and seeing through being recognized as purpose etc. of light and apply in the surface reflection of polaroid; the mode of slightly coming to the surface that for example can be by adopting sandblast mode or embossing processing mode or cooperate suitable mode such as transparent particulate is given the micro concavo-convex structure to the transparent protective film surface and is formed.

As described transparent particulate, for example can enumerate silicon dioxide or aluminium oxide, titanium dioxide or zirconia, tin oxide or indium oxide, cadmium oxide or antimony oxide etc. that mean grain size is 0.5～20 μ m, also can use inorganic particles with electric conductivity, in addition, also can use the organic based fine particles that constitutes by crosslinked or uncrosslinked granular thing of polymkeric substance etc.The use amount of transparent particulate is generally, and per 100 mass parts transparent resins use 2～70 mass parts, preferred especially 5～50 mass parts.

Further, as the antiglare layer that has cooperated transparent particulate, can use protective clear layer itself or wait to be provided with at the lip-deep coating layer of protective clear layer.Antiglare layer also can be held concurrently when the diffusion layer (viewing angle compensation function etc.) that is used for the diffusion of polaroid transmitted light is enlarged the visual angle.Described anti-reflection layer or antiblocking layers, diffusion layer or antiglare layer etc. also can be used as the optical layers that is made of thin slice that is provided with these layers etc., are arranged with the protective clear layer branch.

The adhesive phase that exists between barrier film and the polariscope protective seam can use the various bonding agents of acrylic compounds, synthetic rubber class, rubber-like and form.As the constituent material of barrier film, for example can enumerate film of synthetic resin such as paper, tygon, polypropylene, poly terephthalic acid ethylene glycol etc.In order to improve the fissility of peeling off from adhesive phase, on the surface of barrier film, can implement lift-off processing such as silicone-treated, chain alkyl processing, fluorine processing as required.

＜optical axis information 〉

Optical axis information of the present invention is the information relevant with the optical axis of optical thin film, as long as can judge the directivity of optical axis, then have no particular limits, as shown in Figure 2, can be triangle (the acute angle direction refers to optical axis direction), arrow (direction of arrow refers to optical axis direction), other figures, picture, literal etc.In Fig. 2, the trigonometric sum arrow is represented with dotted line in explanation, but in fact optical axis information can not be come visual arriving as dotted line, and the optical axis information that can recognize from the outside is the degree that does not influence high precision defect inspection (for example detecting the inspection of 80 μ m～150 μ m defectives).

In addition, optical axis information can be to form in the precalculated position in whole optics thin-film body, also can be at random to form, and can set it according to fabricator or user's suitable decision and form the position.Under the situation of the optically thin film body of long size, consider,, optical axis information is formed in the whole optics thin-film body even preferably also can both form the mode of optical axis information with off-position arbitrarily from the aspect that finally cuts into preliminary dimension for commercialization.

In addition, optical axis information forms in the mode that is present between surface protective film and the polariscope protective seam (perhaps polaroid).And on the surface protective film that is formed with optical axis information, form adhesive phase.Especially, as shown in Figure 3, the section thickness that the printing that is printed with optical axis information forms thing forms, more to its thickness of peripheral end than inner thickness more little (approaching).Thus, when adhesive phase surrounded the printing formation thing of optical axis information, the height difference at the interface (border) of printing formation thing was unshowy.In addition, all become transparently because printing forms thing, therefore the optical axis information that can recognize from the outside is the degree that does not influence high precision defect inspection (for example detecting the inspection of 80 μ m～150 μ m defectives)

Among Fig. 3, the section configuration that forms thing as printing has x-x section and y-y section for example, but be not defined in these section configurations especially, importantly the printing peripheral end portion thickness that forms thing forms also forr a short time than its inner thickness, and more preferably the printing print thickness that forms thing forms internally and reduces gradually to peripheral end.Also more preferably, form internally under the situation about reducing gradually, reduce gradually with straight line or curve to peripheral end in the print thickness that printing forms thing.Wherein, shown in Figure 3 is the section configuration that forms the Central Line in length and breadth of thing along printing, reduces gradually to peripheral end internally but the section configuration of other parts is print thickness too.

As the formation method of optical axis information, as shown in Figure 4.The printing formation thing of optical axis information shown in Figure 4 is to form as the set of pixel (point).Fig. 4 (a) is that the printing of triangle forms thing, and the pixel at its peripheral position (point) density is inner also littler than it.Such formation is sometimes referred to as gradient (gradation) formation or gradient (gradation) printing.In addition, Fig. 4 (b) is that the printing of triangle forms thing, and the pixel at its peripheral position (point) size is inner also littler than it.On the other hand, the triangle printing of Fig. 4 (c) remarked pixel density under peripheral position and inner same case forms thing.

In addition, optical axis information is preferably used clear dope or is contained fluorophor coating and is formed on the surface protective film, and special hope contains fluorophor coating.This is because use and to contain under the situation of fluorophor coating, with the backlight irradiation just can be simply, recognize reliably.For clear dope or contain fluorophor coating and have no particular limits, can use known material, but from viewpoint, the preferred material that is more suitable for selected for the permanance of bonding agent.

Method as optical axis information is formed on surface protective film has no particular limits, and marking mode, ink-jetting style, transfer printing mode, spraying method, mode of printing can be arranged for example.As mode of printing, letterpress mode, intaglio printing mode, screen printing mode are for example arranged, the letterpress mode that especially preferably can print continuously or intaglio printing mode.In addition, especially preferably make the variation formation of above-mentioned gradient (gradation) formation, Pixel Dimensions, the variation of picture element density form letterpress mode or the intaglio printing mode of being easy to.

In addition, the printing of optical axis information forms the print thickness of thing, the thin thickness of preferred specific viscosity mixture layer, and for example, its thickness is 0.1% to 10% scope of adhesive phase thickness preferably.For example, the average thickness of adhesive phase for example is made as under the situation of 6 μ m, the average thickness that the printing of optical axis information is formed thing is set at the scope of 0.006 μ m to 0.6 μ m.By the thickness setting that the printing of optical axis information is formed thing is in 0.1% to 10% the scope of adhesive phase thickness, can make printing form thing and be surrounded by bonding agent reliably, therefore preferred.Especially the printing thickness that forms thing forms more to its thickness of peripheral end more than its inner thin, and therefore to form the boundary member of thing and adhesive phase unshowy in printing, do not influence visual examination.

＜manufacture method 〉

The following describes an example of the manufacture method of the optically thin film body of long size of the present invention.At first be that (A) obtains polariscopic operation.To implement polyvinyl alcohol (PVA) (PVA) film drying of dyeing, crosslinked and stretch processing at this and obtained polariscope.The draw direction of the stretch processing here is consistent with optical axis direction.(B) operation of manufacturing polaroid.Wherein on polariscopic two sides by bonding agent fit cellulose triacetate (TAC) film and laminated polarizing mirror protective seam, thereby make polaroid.In the accompanying drawings, on stacked TAC film, implemented non-glare treated in advance.

(C) on the manufacturing line different (different manufacturing locations also can), make surface protective film with the manufacturing process of above-mentioned polaroid.The surface protective film blank is sent continuously and transported, on one surface, for example use to contain fluorophor coating or clear dope forms optical axis information continuously in the letterpress mode.

Here, importantly form thing as the printing of printing optical axis information, the printing density at its peripheral position forms littler than the printing density of the inside of this printing formation thing.For example, optical axis information is printed as the section configuration that has as shown in Figure 3 on surface protective film, or forms as the picture element density of Fig. 4 (a) shown in (b).

Then, applying is formed with the stripping film (perhaps paper) and the surface protective film of weak adhesive phase.At this moment, being present in mode between stripping film and the surface protective film with optical axis information and weak adhesive phase fits and is wound as the roller shape.

(D) operation of coating surface protective film.Face (being upside among Fig. 1) at polaroid is gone up by weak bonding agent coating surface protective film.Wherein, printing is formed with optical axis information on surface protective film, and is coated with weak bonding agent.From the surface protective film limit stripping film being peeled off limit and polaroid fits.Optical axis information (printing forms thing) in weak bonding agent that is coated with on the surface protective film and printing formation on surface protective film; even after surface protective film peeled off; also keep being formed on the state on the surface protective film, be not transferred to the TAC film in fact.

(E) operation of applying barrier film.Face (being downside among Fig. 1) at polaroid is gone up by strong bonding agent applying barrier film.Be coated with strong bonding agent in the barrier film in advance here.The strong bonding agent that is coated with on barrier film after having peeled off barrier film, is transferred on the TAC.Operation (D) and (E) can carry out simultaneously also can be carried out operation (E) in operation (D) before.

Through above-mentioned operation, make the optically thin film body of long size.It can be to be cut to preliminary dimension afterwards and to obtain the optically thin film body of preliminary dimension at above-mentioned bonding process (D, E), also can be will long size optically thin film body in other operation, be cut to preliminary dimension after being wound as the roller shape.

By above manufacture method, can obtain following remarkable result: can be with the optically thin film body of the long size of good efficiency manufacturing, and compare with manufacture method in the past and significantly to improve operating efficiency, reduce the cost of manufacturing equipment, reduce human error etc.

＜other embodiments 〉

As optically thin film body of the present invention; for example can enumerate: not being bonded with on the polariscopic one side (face of described bonding agent coating layer is not set) of described transparent protective film (polarizer protecting film), implemented dura mater processing, antireflection processing, anti, with do not have diffusion or anti-dizzy be purpose surface-treated or stacked be the optically thin film body of the aligned liquid-crystal layer of purpose with viewing angle compensation etc.In addition, can also enumerate: fitted reflecting plate more than 1 layer or 2 layers or half transmitting plate, polarizer (comprise 1/2 or 1/4 etc. wavelength plate (λ plate)), viewing angle compensation film etc. are used for the optically thin film body of optical thin film of the formation of liquid crystal indicator etc.Particularly, if optical thin film layer is a polaroid, the polaroid that wide viewing angle polaroid that the ellipsoidal polarizing plate that reflection type polarizer that then suitable stacked reflecting plate of use or semi-penetration plate form or semi-transmission type polaroid, laminated phase-difference plate form or circular polarizing disk, stacked viewing angle compensation layer or viewing angle compensation film form or stacked brightness improving form with film.

Reflection type polarizer is provided with the reflection horizon and forms on polaroid, can be used for forming the liquid crystal indicator of the type that reflection shows from the incident light of identification side (demonstration side) incident etc., and can omit the built-in of light sources such as backlight, thereby have advantages such as being easy to make the liquid crystal indicator slimming.When forming reflection type polarizer, can be undertaken by the suitable modes such as mode of setting up the reflection horizon that constitutes by metal etc. via protective clear layer etc. in the one side of polaroid as required.

As the object lesson of reflection type polarizer, can be exemplified as required on the one side of the transparent protective film of handling through delustring, set up the paper tinsel that constitutes by reflective metal such as aluminium or vapor-deposited film and form the polaroid etc. in reflection horizon.In addition, can also enumerate and make described transparent protective film contain particulate and form surperficial micro concavo-convex structure, and have the reflection type polarizer etc. in the reflection horizon of micro concavo-convex structure thereon.The reflection horizon of described micro concavo-convex structure makes incident light diffusion by diffuse reflection, prevents that thus directionality or outward appearance are shinny, has the advantage that can suppress the light and shade inequality etc.In addition, the protective film that contains particulate also has when incident light and reflected light thereof see through it the advantage etc. that can further suppress the light and shade inequality by diffusion.The formation in micro concavo-convex structure reflection horizon of the surperficial micro concavo-convex structure of reflection transparent protective film, method that for example can be by directly setting up metal on the surface of protective clear layer with suitable modes such as evaporation mode such as vacuum evaporation mode, ion plating mode, sputter mode or plating modes etc. is carried out.

For reflecting plate; replacement directly is attached to mode on the transparent protective film (polariscope protective seam) of described polaroid with it, and described reflecting plate can also use as reflector plate that the reflection horizon forms etc. is set on the suitable film that with this transparent membrane is benchmark.Also have; because the reflection horizon is made up of metal usually; so decline from the reflectivity that prevents to cause owing to oxidation; and then keeping the viewpoint of initial stage reflectivity and the viewpoint of avoiding establishing protective seam in addition to wait for a long time, the type of service that covers its reflecting surface with transparent protective film or polaroid etc. is preferably adopted in the reflection horizon.

Also have, in above-mentioned, the semi-transmission type polaroid can come the catoptrical reflection horizon of the semi-transmission types such as semi-permeable and semi-reflecting mirror of light transmission that makes simultaneously to obtain by making with the reflection horizon.The semi-transmission type polaroid is located at the rear side of liquid crystal cells usually, can form the liquid crystal indicator of following type etc., promptly, in brighter environment, use under the situation of liquid crystal indicator etc., the reflection come from the identification side (demonstration side) incident light and display image, in darker environment, use the built-in powers such as backlight at the back side that is built in the semi-transmission type polaroid to come display image.Promptly, the semi-transmission type polaroid is useful in the formation of liquid crystal indicator of following type etc., that is, can the save on backlight lamp under bright environment etc. the energy that uses of light source, under darker environment, also can use in the formation of liquid crystal indicator etc. of type of built-in power useful.

Ellipsoidal polarizing plate or the circular polarizing disk that further laminated phase-difference plate on the polaroid is constituted describes below.Rectilinearly polarized light being changed into elliptically polarized light or circularly polarized light, perhaps elliptically polarized light or circularly polarized light are changed into rectilinearly polarized light, perhaps change under the situation of polarization direction of rectilinearly polarized light, can use polarizer etc.Particularly, as rectilinearly polarized light being changed into circularly polarized light or circularly polarized light being changed into the polarizer of rectilinearly polarized light, can use so-called 1/4 wavelength plate (be also referred to as λ/4 slice).1/2 wavelength plate (be also referred to as λ/2 slice) is generally used for changing the situation of the direction of polarized light of rectilinearly polarized light.

Ellipsoidal polarizing plate can be used for following situation etc. effectively, i.e. compensation (preventing) supertwist nematic phase (STN) type liquid crystal indicator painted (blue or yellow) that produce because of the birefringence of liquid crystal layer, thus carry out the described painted white black situation about showing etc. that do not have.In addition, it is painted that the polaroid of control three-dimensional refractive index produces in the time of can also compensating (preventing) from the picture of oblique observation liquid crystal indicator, thereby preferred.Circular polarizing disk for example can be used for effectively to situation about adjusting with the tone of the image of the reflection-type liquid-crystal display device of color display image etc., but also has the function of reflecting of preventing.

Other example as optical thin film layer.Can enumerate polarizer.As polarizer, can enumerate to macromolecular material carry out that unidirectional or two-way stretch is handled and the oriented film of the birefringent film that forms, liquid crystal polymer, with the member of the oriented layer of film support liquid crystal polymer etc.Stretch processing for example can utilize the cylinder pulling method, carry out along long gap pulling method, tentering device pulling method, tubular type pulling method etc.Stretching ratio is generally about 1.1～3 times under the situation of unilateral stretching.Thickness to polarizer also is not particularly limited, and is generally 10～200 μ m, preferred 20～100 μ m.

As macromolecular material, for example can enumerate polyvinyl alcohol (PVA), polyvinyl butyral, poly-ethylene methacrylic ether, Poly(Hydroxyethyl Methacrylate), hydroxyethyl cellulose, hydroxypropyl cellulose, methylcellulose, polycarbonate, polyarylate, polysulfones, polyethylene terephthalate, PEN, polyethersulfone, polyphenylene sulfide, polyphenylene oxide, polyene propyl group sulfone, polyvinyl alcohol (PVA), polyamide, polyimide, polyolefin, Polyvinylchloride, cellulose-based polymkeric substance or their two metaclass, the various multipolymers of three metaclass, graft copolymer, blend etc.These macromolecular materials can wait by stretching becomes orientation thing (oriented film).

As liquid crystal polymer, for example can enumerate the backbone chain type of the linearity atomic group (mesogene) that on the main chain of polymkeric substance or side chain, has imported the conjugacy of giving liquid crystal aligning or various polymkeric substance of side chain type etc.Concrete example as main chain liquid crystalline polymer, can enumerate and have the polymkeric substance that combines the structure of linearity atomic group on the spacer portion of bendability giving, for example the polyester to the row orientation is liquid-crystalline polymer, discoid polymkeric substance or cholesteric polymers etc.Concrete example as side chain liquid crystalline polymer, can enumerate following compound etc., promptly, with polysiloxane, polyacrylate, polymethacrylate or poly-malonate as main chain backbone, the spacer portion that constitutes across atomic group as side chain and have compound of the straight line atom regiment headquarters that constitutes by the para-oriented ring shape compound unit of giving to the row orientation etc. by conjugacy.These liquid crystal polymers are for example handled by the following method, promptly, material after friction treatment is carried out on the surface that is formed on films such as polyimide on the glass plate or polyvinyl alcohol (PVA), oblique evaporation on the orientation process face of oxide materials etc., heat-treat after sprawling the solution of liquid-crystalline polymer.

Polarizer can be that for example various wavelength plates or be used to material of compensating painted or visual angle that the birefringence by liquid crystal layer causes etc. etc. has the material corresponding to the suitable phase differential of application target, also can be stacked more than 2 kinds polarizer and controlled the material of optical characteristics such as phase differential.

The viewing angle compensation film is also to make image seem more clearly, be used to enlarge the film of field angle under the situation of the picture of observing liquid crystal indicator from the direction that tilts a little that is not orthogonal to picture.As this kind viewing angle compensation polarizer, for example by the oriented film of polarizer, liquid crystal polymer etc. or transparent base upper support the material etc. of oriented layer such as liquid crystal polymer constitute.As common polarizer, that uses has been implemented unilateral stretching, has had birefringent thin polymer film along its face direction, relative therewith, as the polarizer that is used as the viewing angle compensation film, can use along its face direction and be implemented the birefringent thin polymer film of having of two-way stretch or biaxially oriented film refractive index and that have birefringent polymkeric substance or tilted alignment film and so on of the may command thickness direction that also has been stretched by unidirectional stretching and along its thickness direction along its face direction etc.As the tilted alignment film, for example can enumerate behind the bonding heat-shrinkable film on the thin polymer film under effect because of the convergent force that adds thermosetting, thin polymer film has been carried out stretch processing or/and the material of shrink process; Make material that the liquid crystal polymer tilted alignment forms etc.Starting material polymkeric substance as polarizer, can use the polymer phase that illustrates in the polarizer with the front with polymkeric substance, can use with the painted grade that variation was brought at the identification angle that prevents to form or enlarge the suitable polymkeric substance as purpose such as the good visual angle of identification based on the phase differential that causes by liquid crystal cells.

In addition, from the viewpoint that realizes the wide visual field angle that identification is good etc., can preferably use the optical compensation polarizer of the optical anisotropic layer that constitutes by the tilted alignment layer of the oriented layer of liquid crystal polymer, particularly discoid liquid crystal polymer with the cellulose triacetate film support.

With polaroid and the film adhered polaroid that forms of brightness improving together, be located at the back side one side of liquid crystal cells usually and use.The brightness improving film is the film that shows below characteristic, promptly, when because of the backlight of liquid crystal indicator etc. or from reflection of rear side etc., when natural light incident is arranged, the rectilinearly polarized light of reflection regulation polarizing axis or the circularly polarized light of prescribed direction, and make other light transmissions, therefore brightness improving film and the stacked polaroid that forms of polaroid can be made light incident from light sources such as backlights, and the light that sees through of polarized light state is stipulated in acquisition, simultaneously, light beyond the described regulation polarized light state can not see through, and is reflected.Be reversed in the light that reflects on this brightness improving pellicular front once more by reflection horizon of being located at its rear side etc., make it to incide once more on the brightness improving film, make its part or all light transmission as the regulation polarized light state, thereby increase the light that sees through the brightness improving film, simultaneously provide the polarized light that is difficult to absorb to polariscope, can be thereby increase in the light quantity of utilization in the image demonstration of liquid crystal display etc., and can improve brightness thus.Promptly, pass polariscope and make under the situation of light incident from the rear side of liquid crystal cells with backlight etc. not using the brightness improving film, have light with the inconsistent polarization direction of polariscopic polarizing axis and be polarized mirror basically and absorb, thereby can't see through polariscope.That is, though can be different because of employed polariscopic characteristic, about 50% light can be polarized mirror and sponge, and therefore, the light quantity that can utilize in the liquid crystal image demonstration etc. will reduce, and cause the image deepening.Because the brightness improving film carries out following operation repeatedly, promptly, making the light with the polarization direction that can be polarized the mirror absorption is not to incide on the polariscope, but such light is reflected on the brightness improving film, and then finish counter-rotating by reflection horizon of being located at its rear side etc., light is incided on the brightness improving film once more, like this, the brightness improving film only makes in the light of the two reflection and counter-rotating, its polarization direction becomes and can see through by the polarized light of polariscopic polarization direction, provide it to polariscope simultaneously, therefore can in the demonstration of the image of liquid crystal indicator, use the light of backlight etc. effectively, thereby can make picture bright.

Also can between brightness improving film and described reflection horizon etc., diffuser plate be set.Towards described reflection horizon etc., set diffuser plate can spread the light that passes through equably by the light of the polarized light state of brightness improving film reflection, eliminates polarized light state simultaneously and becomes the nonpolarized light state.That is, diffuser plate returns to original natural light with polarized light.Carry out following operation repeatedly, that is, and after being reflected by reflection horizon etc., once more by diffuser plate and incide on the brightness improving film.So make polarized light return to the diffuser plate of original natural light state by between brightness improving film and described reflection horizon etc., being provided with, can be in the brightness of keeping display frame, reduce the inequality of the brightness of display frame, thereby even and bright picture can be provided.By this diffuser plate is set, thinking suitably to increase the repeated reflection number of times of first incident light, and utilizes the diffusion function of diffuser plate, and bright uniformly display frame can be provided.

As described brightness improving film, for example can use: the demonstration of thin-film multilayer laminated body that dielectric multilayer film or refractive index anisotropy are different and so on send as an envoy to the rectilinearly polarized light of regulation polarizing axis see through and reflect the characteristic of other light film, cholesteric liquid crystal polymer oriented film or in the film substrate upper support the demonstrating any circularly polarized light reflection that will be in left-handed or the dextrorotation of film and so on of this aligned liquid-crystal layer and film that the film etc. of the characteristic of other light transmissions is suited.

Therefore, make the brightness improving film of the type that the rectilinearly polarized light of described regulation polarizing axis sees through by utilization, make this see through light and directly incide on the polaroid, can when suppressing the absorption loss that causes by polaroid, light be seen through effectively along the direction consistent with polarizing axis.On the other hand, utilize the brightness improving film that makes the type that circularly polarized light sees through of cholesteric and so on, though light is incided on the polariscope, but, from suppressing the viewpoint of absorption loss, preferably this circularly polarized light carry out rectilinearly polarized lightization, reenter afterwards and be mapped on the polaroid by polarizer.And, by using 1/4 wavelength plate, circularly polarized light can be transformed to rectilinearly polarized light as this polarizer.

In broad wavelength coverages such as visible region, can play the polarizer of 1/4 wavelength plate effect, for example can utilize following mode to obtain, that is, the phase separation layer that will play the polarizer of 1/4 wavelength plate effect with respect to the light luminous energy of wavelength 550nm and show other phase difference characteristics for example can play the overlapping mode of the phase separation layer of 1/2 wavelength plate effect etc.So the polarizer that is disposed between polaroid and the brightness improving film can be made of the phase separation layer more than 1 layer or 2 layers.

Also have, with regard to cholesteric, also can make up the material of different reflection wavelengths, constitute overlapping configuration structure more than 2 layers or 3 layers, obtain member thus, thereby can obtain the circularly polarized light that sees through of broad wavelength coverage based on this at the wavelength coverage internal reflection circularly polarized light of broads such as visible region.

In addition, optically thin film body of the present invention (for example polaroid) is as described polarized light divergence type polaroid, can be made of the member of stacked polaroid and the optical layers more than 2 layers or 3 layers.So, also can be to have made up reflection-type ellipsoidal polarizing plate that described reflection type polarizer or semi-transmission type polaroid and polarizer form or semi-transmission type ellipsoidal polarizing plate etc.

Can utilize at the optically thin film body of stacked described optical layers on the polaroid that stacked respectively successively mode forms in the manufacture process of liquid crystal indicator etc., but good through being laminated in advance at aspects such as quality of stability or assembly operations to the polaroid of optical thin film, therefore have the advantage of the manufacturing process that can improve liquid crystal indicator etc.In stacked, can use suitable bonding agencies such as bond layer.When bonding described polaroid and other optical layers, their optical axis can adopt the arrangement angles that suits according to target phase difference characteristic etc.

In optically thin film body of the present invention (polaroid) or described lamination optics, also can be provided for and the bonding bonding coats of other members such as liquid crystal cells.Be not particularly limited for this bonding coat, can form with identical in the past suitable bonding agent with acrylic compounds etc.From preventing the foamed phenomenon that causes by moisture absorption or peel off phenomenon, prevent the warpage of the reduction of the optical characteristics that causes by thermal expansion difference etc. or liquid crystal cells and form high-quality and aspect such as permanance excellent images display device is considered, the bonding coat of the low and excellent heat resistance of preferred hydroscopicity.In addition, can make by containing particulate and demonstrate bonding coat of light diffusing etc.Adhesive linkage is arranged on needed as required and upward gets final product, and for example, concerning the polaroid that is made of polariscope and polariscope diaphragm, on the single or double of polariscope protective seam bonding coat is set as required and gets final product.

Also have; among the present invention; form each layers such as polariscope, polariscope protective seam, optical thin film layer or bonding coat of above-mentioned polaroid; also can be made into member with ultraviolet absorption ability etc. by the modes such as mode of for example using bigcatkin willow acid esters compound or benzo phenol (benzophenol) compounds, benzotriazole compound or ultraviolet light absorbers such as cyanoacrylate compound, nickel complex salt compounds to handle.

Optically thin film body of the present invention preferably is applicable in the formation of image display devices (being equivalent to optical display) such as liquid crystal indicator, organic EL display, PDP.

Optically thin film body of the present invention preferably is used in formation of various devices such as liquid crystal indicator etc.The formation of liquid crystal indicator can be carried out according to mode in the past.Promptly, in general, liquid crystal indicator can form by component parts such as combination of liquid crystals unit (being equivalent to optical display unit) and polaroid or optical thin film aptly and the illuminators that adds as required and with their driving circuits etc. of packing into, in the present invention, except using polaroid of the present invention or optical thin film this point, be not particularly limited, can carry out according to mode in the past.For liquid crystal cells, for example can use any types such as TN type, STN type, π type.

The one or both sides that can be formed on liquid crystal cells have disposed the liquid crystal indicator of polaroid or optical thin film, used the suitable liquid crystal indicators such as device of backlight or reflecting plate in illuminators.At this moment, polaroid of the present invention or optical thin film can be arranged on the one or both sides of liquid crystal cells.When polaroid or optical thin film were arranged on both sides, they both can be identical materials, also can be different materials.In addition, when forming liquid crystal indicator, can be on suitable position suitable members such as for example diffuser plate of configuration more than 1 layer or 2 layers, antiglare layer, antireflection film, fender, prism array, lens arra thin slice, light diffusing sheet, backlight.

Optically thin film body of the present invention preferably is applicable in formation of various devices such as liquid crystal indicator etc.Liquid crystal indicator can form and optically thin film body of the present invention is configured in the one-sided of liquid crystal cells or infiltration type that bilateral forms or reflection-type or see through-the reflection dual-purpose type have a device with the identical in the past structure that suits.So the liquid crystal cells that forms liquid crystal indicator can be arbitrarily, for example also can use with the liquid crystal cells of film transistor type as the driving suitable types such as liquid crystal cells of the simple matrix of representative.

In addition, when in the both sides of liquid crystal cells polaroid or optics being set, these both can be identical members, also can be mutually different members.And then, when forming liquid crystal indicator, prism array thin slice or suitable parts such as lens arra thin slice, light diffusing sheet or backlight more than 1 layer or 2 layers are set on for example can be in position.

Example as optical thin film layer among the present invention has illustrated polaroid, but the present invention is not limited only to this, and optical thin film goes for the duplexer of polaroid and polarizer, also can be only applicable to polarizer.

＜embodiment 〉

In an embodiment, (operation A～E) makes the optically thin film body of polaroid as shown in Figure 1, and to cut into diagonal angle length be 6 inches according to above-mentioned manufacture method.Used cold light イ Application キ メ ジ ユ one system (big Japanese ink She System) as containing fluorophor coating.The thickness of setting surface protective film is that the average thickness of 100 μ m, weak bonding coat is 6 μ m, and the average thickness that the printing of optical axis information forms thing is 0.01 μ m.Shown in Fig. 4 (a), the optical axis information that forms among the operation C is that the printing of triangle forms thing, and the picture element density at its peripheral position constitutes littler than its inside, and be printed as be formed with predetermined space several.Optical axis information can simply by the irradiation backlight be confirmed for roughly transparent but can be judged to other information in visual examination on the whole.

＜comparative example 〉

In the comparative example, except the optical axis information that is formed by operation C shown in Fig. 4 (c) is that printing forms the identical information of the picture element density of thing, the manufacture method that other are identical with embodiment has been made the optically thin film body of polaroid as shown in Figure 1.

＜estimate

The optically thin film body that obtains in the foregoing description and the comparative example has been carried out defect inspection.This defect inspection is carried out to be checked the mode of 5 optically thin film bodies by 10 visual examination persons.At this moment, optically thin film body has used following thin-film body,, according to amounting to the mode with 15 defectives in 5 optically thin film bodies, forms near the thin-film body of the random arrangement defective peripheral position of thing in the printing of optical axis information that is.And near the defective sum that forms about the printing of optical axis information the peripheral position of thing is not informed the overlooker and has been compared the accuracy rate that detects defective.Its result is as shown in table 1.The defective recall rate is meant the accuracy rate that detects for number of defects in the table 1, and under the situation that detects of embodiment, 10 overlookers all can detect 15 defectives (defective recall rate 100%) in the optical axis information, thereby loss is 0%.On the other hand, in the comparative example omission maximum 5 to minimum 1 defectives.

Table 1

(overlooker is made up of the passed examination person person who assert according to company standard)

From the result of above embodiment and comparative example as can be known, among the embodiment, form littler than the printing density of the inside of this printing formation thing by the printing density (picture element density) that the printing of optical axis information is formed the peripheral position of thing, can check out defective reliably, and in the comparative example, because of printing forms the peripheral position of thing and the printing density of inside forms identical printing density, so be subjected to the influence of optical axis information omission defective.That is,, optical axis information can be recognized reliably, also defective can be in the defective inspection, detected reliably simultaneously from the outside according to the embodiment of the invention.

Claims (10)

1. optically thin film body; it is the optically thin film body that forms at the surface protective film with this optical thin film laminar surface of stacked guard on the optical thin film layer of optical axis; it is characterized in that; passing through printing; in forming on the described surface protective film under the situation of the optical axis information relevant with described optical axis; the optical axis information that this is printed is promptly printed the formation thing, and the printing density at its peripheral position is formed littler than the printing density of the inside of this printing formation thing.

2. optically thin film body as claimed in claim 1, it is characterized in that, the printing density that makes described printing form the peripheral position of thing form than this printing form thing inside printing density more hour, the peripheral end portion thickness of printed article constitutes littler than the thickness of the inside of this printing formation thing.

3. optically thin film body as claimed in claim 2 is characterized in that, the print thickness that forms thing according to described printing forms to the mode that reduce gradually peripheral end internally.

4. optically thin film body as claimed in claim 3 is characterized in that, the central section configuration that described printing forms thing is chevron, trapezoidal or triangle.

5. optically thin film body as claimed in claim 3 is characterized in that, the mode that reduces gradually to peripheral end internally in the print thickness that forms thing according to described printing forms under the situation of printing formation thing, and this reduces gradually is straight line or curve mode.

6. optically thin film body as claimed in claim 1, it is characterized in that, form under the littler situation of the printing density of the inside that forms thing than this printing in the printing density that makes described printing form the peripheral position of thing, the picture element density at the peripheral position of printed article constitutes littler than the picture element density of the inside of this printing formation thing.

7. optically thin film body as claimed in claim 1, it is characterized in that, under the printing density that makes described printing form the peripheral position of thing formed than the littler situation of the printing density of described printing formation thing inside, the Pixel Dimensions at the peripheral position of printed article constituted littler than the Pixel Dimensions of the inside of this printing formation thing.

8. as each described optically thin film body of claim 1 to 7, it is characterized in that, use the coating that contains fluorophor that described optical axis information is printed on the described surface protective film.

9. as each described optically thin film body of claim 1 to 8, it is characterized in that described optical axis information is set between surface protective film and the optical thin film layer.

10. the manufacture method of an optically thin film body is characterized in that, is the manufacture method of the optically thin film body that forms at the surface protective film with this optical thin film laminar surface of stacked guard on the optical thin film layer of optical axis, and this method comprises at least:

Printing process, the printing optical axis information relevant on described surface protective film with described optical axis; With

Bonding process, in the described printing process of fitting, be printed the surface protective film and described optical thin film layer of optical axis information in, this optical axis information setting is fitted between surface protective film and optical thin film layer,

In described printing process, the printing density that forms its peripheral position of thing as the printing of this optical axis information that is printed is formed littler than the printing density of the inside of this printing formation thing.

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