CN100402227C - Cutting working method of laminates and laminates and optical component and image displaying device - Google Patents

Abstract

The laminated sheet cutting method for cutting and finishing the cut surfaces of rectangularly cut laminated sheets, includes a clamping step and a cutting step. In the clamping step, a plurality of laminated sheets which are piled up in the thickness direction are clamped by a clamping means 3 from above and below, and in the cutting step, the cut surfaces of the laminated sheets are cut by means of a rotary blade 2 while being clamped. By the method, the total clamp area of both upper and lower surfaces of the laminated sheets by the clamping means 3 is set to 5 to 40 % of twice a rectangular area of the laminated sheet. The clamp area includes rectangular four corners of, and at least one of a pair of long sides 3a and a pair of short sides 3b forming a rectangle has a non-clamp area defined therein which are not clamped by the clamping means.

Description

Stacked cutting working method

Technical field

The present invention relates to a kind ofly cut stacked cutting working method of the stacked section that fine finishining is cut to rectangle and stacked of utilizing this method to be cut, and be mounted with image display device by this stacked optical thin film that obtains or optical element.

Background technology

With stacked (for example,, being also referred to as laminate film sometimes) when being cut to the rectangular dimension of regulation, using and die-cutly cut off with the master to stacked of elongate such as cutter with the formation of optical thin film layer and adhesive linkage.This stacked, under situation about using as polarizer, along single shaft to or biaxial stretching processing and when being cut to rectangular dimension, the parallel or almost parallel ground cut-out along draw direction.In this case, section produces fibrous (palpus shape) split pieces.In addition, when including adhesive linkage, the situation that the pressure when having because of cut-out causes bonding agent to overflow.Like this, because the overflowing in subsequent handling, to become quality is reduced of the generation of split pieces or bonding agent, so must remove.

Therefore, known spy opens the cut-out processing method of the anisotropic films that discloses in the clear 61-136746 communique.In this processing method, has implemented along the tensile axis with anisotropic film and to have cut off after the processing, carry out machining to cutting off the processing mouth.Thus, can carry out the operation of removing of fibrous fracture sheet etc.

Yet, in above-mentioned prior art, do not mention the situation of carrying out machining with the good precision that includes repeatability.That is, stacked is cut to after the rectangle, though carry out fine finishining by the cutting face, this accurately machined dimensional accuracy must comprise also that repeatability and precision process goodly.That is after machining, must fine finishining be the rectangle of given size.

Summary of the invention

The present invention is in view of above-mentioned truth, it is a kind of when the section of stacked of cutting fine finishining that its purpose is to provide, the stacked cutting working method that can comprise repeatability and process with good precision, and stacked of utilizing this method to be cut, and be mounted with image display device by this stacked optical thin film that obtains or optical element.

Be used to solve of the present invention stacked cutting working method of above-mentioned problem, it is a kind of cutting working method of stacked that fine finishining is cut to stacked section of rectangle that cuts, it is characterized in that, it possesses: under the state overlapping many pieces stacked along thickness direction, by clamp mechanism with many pieces stacked operation that clamps from two surface direction up and down; With clamping under the many pieces stacked state, operation by the section of cutting mechanism cutting lay lamination, wherein, total clamping area on stacked two surfaces up and down of above-mentioned clamp mechanism be stacked above-mentioned rectangular area twice 5～40%, in clamping region, comprise four jiaos of above-mentioned rectangle, on a pair of long limit or at least one side in the pair of short edges that constitute above-mentioned rectangle, set the non-clamping region that is not clamped, and should only be set in upper surface side by non-clamping region by above-mentioned clamp mechanism.

Constitute according to this, under the state overlapping many pieces stacked, utilize clamp mechanism to clamp along thickness direction.Each stacked size that is cut to regulation in advance by cutter.During clamping, though be positioned at uppermost stacked upper surface and to be positioned at nethermost stacked lower surface clamped, present inventors find can cut with good precision by setting total clamping area on two surfaces up and down as described below.

That is, if the area of stacked upper surface (lower surface too) is made as S, then always clamping area is 5～40% of 2 * S.In addition, during clamping, comprise four jiaos of rectangular layer lamination.Have, the complete cycle of clamp rectangular is not provided with non-clamping region on a pair of long limit that constitutes rectangle or the wherein side in the pair of short edges again.Like this, by adopting clamping mode, can provide a kind of when the section of stacked of machining, the stacked cutting working method that can comprise repeatability and process with good precision.

As preferred implementation of the present invention, what enumerate is that clamping area with lower face side is set at also bigger than the clamping area of upper surface side.

Clamping area by making lower face side is also bigger than upper surface side, can clamp under stable status.

As other preferred implementations of the present invention, what enumerate that clamp mechanism in the clamping region uses is flexible material.

By using flexible material, can stacked not clamped with causing damage.

Description of drawings

Fig. 1 is the figure of the concrete grammar of expression cutting process.

Fig. 2 is the figure (other embodiments) of the concrete grammar of expression cutting process.

Fig. 3 is the figure of the clamping region of expression embodiment.

Fig. 4 is the figure of the clamping region of expression comparative example 1.

Fig. 5 is the figure of the clamping region of expression comparative example 2.

The specific embodiment

Utilize accompanying drawing, the preferred implementation of cutting process of the present invention stacked is described.The concrete grammar of cutting process at first, is described according to Fig. 1,2.

(cutting process)

Fig. 1 possesses the example of 1 rotary cutter 2 (being equivalent to cutting mechanism) when being the section (end face) of cutting lay lamination 1.Rotary cutter 2 does not move though be driven in rotation pivot.On the other hand, stacked 1 to be driven control along the transportable mode of X (horizontal stroke) Y (indulging) θ (rotation) direction.Move complete cycle that can the cutting face to above-mentioned all directions by making stacked 1.Stacked 1 is rectangle, is rectangle or square.

Fig. 2 represents other embodiment, is provided with two rotary cutter 2A, 2B. Rotary cutter 2A, 2B are only to be driven control along the transportable mode of Y direction.In addition, stacked 1 is driven control along X θ direction.According to this formation, at first, can cut stacked 1 relative long limit 1a of rectangle simultaneously, then cut relative minor face 1b simultaneously.When the long limit of cutting, during with the cutting minor face, can change the interval of 2 rotary cutter 2A, 2B.Have again, when carrying out stacked 1 section cutting, under stacked many pieces stacked 1 state, carry out.Under stacked 1 stacked situation, be in the state of neat section.Thus, owing to can process many pieces stacked 1 simultaneously, so working (machining) efficiency is good.And when carrying out machining, stacked 1 is cut to rectangle by shearing device in advance in last operation.Certainly, as cutting process, be not limited to Fig. 1, method shown in Figure 2.

Next, the clamping action to clamp mechanism describes.In order stably to carry out machining, be necessary to clamp stacked stacked 1 from above-below direction.In this case, the clamping force effect of direct clamp mechanism is to be positioned at uppermost stacked 1 upper surface and to be positioned at nethermost stacked 1 lower surface.With under stacked 1 stacked situation, be preferably many pieces, particularly more than 10 pieces.

In addition, be made as S by area with stacked 1 rectangle, then with respect to 2 times of rectangular area (2 * S), the clamping area K on two surfaces up and down during gripping layer lamination 1:

K＝2×S×(5～40％)

The precision and the repeatability that can help machining.And, the clamping area of lower face side is made as K1, the clamping area of upper surface side is made as under the situation of K2,

K＝K1+K2。

Have again, by making K1＞K2, can become the state of having stablized.Also have, when clamping, four jiaos of rectangle must clamp (representing with 1c) in Fig. 2.Thus, can more stably clamp.Here four jiaos are gone up the angle part that more is in the inboard than the end limit for stacked that refers to rectangle (square, rectangle) after the machining.In addition, at least one square one-tenth among relative a pair of long limit 1a, the pair of short edges 1b and the non-clamping region of clamp mechanism.Owing to be at least one side, only can adopt for a pair of long limit 1a, only for pair of short edges 1b, any for a pair of long limit 1a and minor face 1b both sides.By adopting these clamping means, can improve cutting precision, optimize repeatability.

Utilize under the situation that clamp mechanism clamps, clamp the tool materials of action, be preferably flexible material, as this flexible material, what enumerate is plastic materials such as the rubber type of material that is made of NBR, SBR, silicon etc. or macromolecule resin.In addition, the hardness of these flexible materials (JIS A) is preferably 60～80 °.If harder than it, then on stacked, form the impression that causes by clamp mechanism, if softer than it, then the distortion because of flexible material produces position deviation, cutting precision reduces.Depression bar pressure in this case is set at 2kg/cm ²～10kg/cm ²

(stacked concrete example)

As stacked,, preferably be applicable to the material of optics in the present invention though not restriction especially can be used the material that utilizes the stacked various parts of bonding agent.

As optics, for example, enumerate be on polariscopic one or both sides across bond layer, the polarizer of stacked transparent protective film.

Polariscope does not limit especially, can use various materials.As polariscope, for example can enumerate dichroic substance such as absorption iodine or dichroic dye on the hydrophilic macromolecule films such as polyvinyl alcohol film, part dimethoxym ethane polyvinyl alcohol film, the partly-hydrolysed film of EVAc class, the material of simple tension, polyenoid based oriented films such as the desalination acid treatment thing of the processed thing of polyvinyl alcohol or polyvinyl chloride etc.The preferred in these polariscope that constitutes by dichroic substance such as polyvinyl alcohol film and iodine.Though these polariscopic thickness do not limit especially, are generally about 5～80 μ m.

Of the polariscope of iodine, for example can make for 3～7 times that be stretched as former length by dyeing in the aqueous solution that polyvinyl alcohol is immersed in iodine with dyeing of polyvinyl alcohol film and simple tension.As required, also can be immersed in the aqueous solution of boric acid or KI etc.And then, as required, also can be before dyeing that polyvinyl alcohol is thin film dipped in water, wash.By washing polyvinyl alcohol film, except dirt or the anticlogging agent that can clean the polyvinyl alcohol film surface, expand by making the polyvinyl alcohol film, prevent that also the spot that dyes etc. is inhomogeneous.Stretching can be carried out after with iodine staining, also can stretch on the Edge Coloring limit, or use iodine staining again after stretching.Also can or stretch in the water-bath in the aqueous solution of boric acid or KI etc.

Be arranged on the transparent protective film of above-mentioned polariscopic one or both sides, superior materials such as preferably clear, mechanical strength, heat endurance, covering property of moisture, isotropism.As the material of transparent protective film, for example enumerate the styrenic polymer, polycarbonate polymer etc. of acronal, polystyrene or AS resin acrylonitrile styrene resin (AS resin) etc. of the cellulosic polymer, polymethyl methacrylate etc. of polyester polymer, diacetyl cellulose or the triacetyl cellulose etc. of PETG or PEN etc.In addition, enumerate and use polyethylene; polypropylene; lopps and polyolefin with ENB structure; the polyolefin polymers of ethylene propylene copolymerization thing class; the polyvinyl chloride-base polymer; the acylamide polymer of nylon or aromatic polyamide etc.; the imines base polymer; the sulphur base polymer; the polyether sulphur base polymer; polyether-ether-ketone polymer; polyhenylene sulfuration thing base polymer; vinyl alcohol polymer; the vinylidene chloride base polymer; the polyvinyl butyral resin base polymer; the arylide base polymer; the polyformaldehyde base polymer; epoxide polymer or above-mentioned mixture of polymers etc. also are examples that forms the polymer of above-mentioned transparent protective film.Enumerate material with filmings such as thermohardening types such as acrylic compounds or urethanes class, acrylic-amino Ethyl formate class or epoxies, silicon class and ultraviolet curing resins.

The thickness of transparent protective film is generally below the 500 μ m, is preferably 1～300 μ m.Particularly preferred 5～200 μ m's.

As transparent protective film, according to polarization characteristic or durability etc., cellulosic polymers such as preferred triacetyl cellulose.Particularly preferred triacetylcellulose film.And, be provided with in polariscopic both sides under the situation of transparent protective film, outer can use the transparent protective film that constitutes by the same polymer material within it, the transparent protective film that also can use different polymeric materials etc. to constitute.

In addition, the spy opens the thin polymer film of record in the 2001-343529 communique (WO01/37007), for example, enumerates and contains the thermoplastic resin that has replacement and non-substituted imine base at (A) side chain; Resin combination with the thermoplastic resin that has replacement and non-phenyl and itrile group at (B) side chain.As a specific example, enumerate and contain by the contract film of resin combination of alternate copolymer that imines constitutes and acrylonitrile styrene copolymer of isoprene and N-methyl-maleic anhydride.Film can use the mixing of resin combination to be pressed into the film that product etc. constitute.

Have again, transparent protective film, preferred not painted as far as possible.Therefore, preferably uses and use Rth=[(nx+ny)/2-nz] phase difference value of the film thickness direction represented of d (nx, ny are the principal refractive index in the thin film planar, and nz is the refractive index of film thickness direction, and d is a film thickness) is-90nm～+ protective film of 75nm.Phase difference value (Rth) by using these thickness directions for-90nm～+ film of 75nm, can eliminate painted (optical clouration) of the polarizer that causes because of protective film substantially.The phase difference value of thickness direction (Rth), be more preferably-80nm～+ 60nm, especially preferably-70nm～+ 45nm.

Make above-mentioned transparent protective film not with the bonding face of polariscope on, also can implement with hard coat (hard coat) or antireflection handle, anti-adhesion (sticking) or diffusion and anti-dazzle (antiglare) be the processing of purpose.

Hard coat handle be with the polarizer surface to prevent impaired be the processing that purpose is carried out, for example can form in the lip-deep mode that good hardening coats such as the hardness of the ultraviolet curing resin that acrylic compounds, silicon class etc. are suitable or sliding properties are attached to transparent protective film.It is preventing that the lip-deep outer reflection of light of polarizer from being the processing that purpose is implemented that antireflection is handled, can be by being that the formation of the antireflection film etc. of standard achieves the goal with existing.In addition, anti-adhesion is handled to prevent that itself and connecting airtight of adjacent layer from being that purpose is implemented.

Also have; it is to prevent external light reflection on the surface of polarizer that anti-dazzle is handled; the processing that the visual grade that hinders polarizer to see through light is implemented for purpose; for example, the surface roughening mode that can be by utilizing sandblast mode or embossing processing mode or the suitable modes such as fit system of transparent particulate are paid the micro concavo-convex structure and are formed on transparent protective film.The particulate that is contained in the formation as above-mentioned surperficial micro concavo-convex structure, the transparent particulates such as organic based fine particles that for example can to use average particle diameter be the mineral-type particulate that also has electric conductivity of the formation such as silica, aluminium oxide, titanium dioxide, zirconia, tin oxide, indium oxide, cadmium oxide, antimony oxide of 0.5～50 μ m, be made of crosslinked or uncrosslinked polymer etc.Under the situation that forms surperficial micro concavo-convex structure, the use amount of particulate, transparent resin 100 weight portions with respect to forming surperficial micro concavo-convex structure are generally about 2～50 weight portions, are preferably 5～25 weight portions.Anti-dazzle photosphere also can be to have the part that diffusion polarizing piece sees through light and enlarges the diffusion layer (enlarging viewing function etc.) of usefulness such as visual angle concurrently.

And above-mentioned anti-reflection layer, anti-adhesive linkage, diffusion layer or anti-dazzle photosphere etc. except being arranged on the transparent protective film, as other purposes optical layers, also can be used as the part different with protective clear layer and are provided with.

In the bonding processing of above-mentioned polariscope and transparent protective film, can use various water class bonding agents.As water class bonding agent, can enumerate polyvinyl alcohol bonding agent, gelatin class bonding agent, vinyl latex, water class polyurethane, water kind polyester etc.Above-mentioned bonding agent uses the bonding agent that is made of the aqueous solution usually.

By in above-mentioned bonding agent, containing water-soluble cross-linker, can increase gel strength, cementability is improved.In the polyvinyl alcohol bonding agent, can contain water-soluble cross-linkers such as boric acid, borax, glutaraldehyde, melamine, oxalic acid.Though the addition of water-soluble cross-linker does not limit especially, with respect to solid constituent 100 weight portions of main materials such as polyvinyl alcohol, be below 40 weight portions usually.Be preferably 0.5～30 weight portion.In addition, above-mentioned bonding agent also can make PH change in order to make crosslinked carrying out.And then, in above-mentioned bonding agent, in modulation during its aqueous solution, as required, can cooperate the additive of anticorrisive agents such as formic acid, phenol, salicylic acid, benzaldehyde etc.

The applying of polariscope and transparent protective film can utilize the roll-type laminating machine to carry out.The thickness of adhesive linkage though do not limit especially, is generally about 0.05～5 μ m.

Above-mentioned polarizer, in use, the optical thin film that can be used as with other optical layers after stacked uses.About this optical layers, limit especially, for example can use certain optical layers in the formation of liquid crystal indicators such as reflecting plate or half transmitting plate, polarizer (comprise 1/2 or 1/4 etc. wavelength plate), viewing angle compensation film etc., used more than 1 layer or 2 layers.Particularly, in polarizer of the present invention, reflection type polarizer that preferred further stacked reflecting plate or semi-penetration plate form or semi-transmission type polarizer, at the wide viewing angle polarizer of further stacked viewing angle compensation film on the polarizer or the further polarizer of stacked raising brightness film on polarizer.

Reflection type polarizer, be that the reflecting layer is set on polarizer, be to form the polarizer that the liquid crystal indicator make the type that shows from the reverberation reflection of visual side etc. uses, have and to omit the built-in of light sources such as back lighting device, reach the advantages such as purpose of thinness of liquid crystal indicator simply.The formation of reflection type polarizer as required, can utilize across protective clear layer etc., and the mode etc. of setting up the reflecting layer that is made of metal etc. on the single face of polarizer suitably mode is carried out.

As the concrete example of reflection type polarizer, enumerate when being necessary, set up paper tinsel or the vapor-deposited film that constitutes by reflective metal such as aluminium on the single face of the transparent protective film after delustring is handled, thus the polarizer in formation reflecting layer etc.In addition, also enumerate to make in the above-mentioned transparent protective film and contain particulate, make surperficial micro concavo-convex structure, have the polarizer etc. in the reflecting layer of micro concavo-convex structure thereon.The reflecting layer of above-mentioned micro concavo-convex structure has by irregular reference and makes incident light diffusion, prevents directionality or twinkling outward appearance, suppresses the uneven advantage of light and shade etc.Have again, contain the transparent protective film of particulate, also have when incident light and reverberation thereof see through film and spread, further suppress the uneven advantage of light and shade etc.Make the formation in reflecting layer of micro concavo-convex structure of the surperficial micro concavo-convex structure reflection of transparent protective film; for example; can utilize in suitable modes such as evaporation modes such as vacuum evaporation mode, ion plating mode, cathodic sputtering mode or plating modes, the lip-deep method that metal directly is attached to protective clear layer waits carries out.

Reflecting plate replaces the mode directly pay on the transparent protective film of above-mentioned polarizer, and also can be used as with the transparent membrane is the reflector plate that the reflecting layer forms to be set on the suitable film of standard use.And; because the reflecting layer is made of metal usually; so its reflecting surface by the occupation mode under the lining states such as transparent protective film or polarizer, more preferably reduces at the reflectivity that prevents to be caused by oxidation, also has the long-term avoidance aspect of setting up in addition that continues aspect or protective layer of initial reflectance.

And the semi-transmission type polarizer can be by using reflective layer reflects light in above-mentioned, and the semi-transmission type reflecting layer of making the half-mirror that sees through etc. obtains.The semi-transmission type polarizer, usually be arranged on the inboard of liquid crystal cells, can be formed in the brighter environment under the situation of using liquid crystal indicator etc., make incident light reflection from visual side (demonstration side), display image, in more dim environment, use the built-in light sources such as back lighting device that are built in the semi-transmission type polarizer back side, the liquid crystal indicator of the type of display image etc.That is, the semi-transmission type polarizer, under bright environment, can the save on backlight device etc. the energy that uses of light source, be useful even under more dim environment, utilize the formation of liquid crystal indicator that built-in light source also can type of service etc.

Ellipsoidal polarizing plate or circular polarizing disk that further laminated phase-difference plate on polarizer is formed describe.Rectilinearly polarized light being become elliptically polarized light or circularly polarized light, perhaps elliptically polarized light or circularly polarized light are become rectilinearly polarized light, or under the situation of the polarization direction of change rectilinearly polarized light, use polarizer etc.Particularly, as rectilinearly polarized light being become circularly polarized light or circularly polarized light being become the polarizer of rectilinearly polarized light, use so-called 1/4 wavelength plate (being also referred to as λ/4 plates).1/2 wavelength plate (being also referred to as λ/2 plates) uses under the situation of the polarization direction that changes rectilinearly polarized light usually.

Ellipsoidal polarizing plate by STN Super TN (super twist nematic) (STN) birefringence of the liquid crystal layer of type liquid crystal indicator and painted (blue or yellow) that produce, shows that the situation etc. of above-mentioned uncoloured black and white is used effectively down in compensation (preventing).Have, the refractive index that control is three-dimensional preferably also can compensate painted that (preventing) produced when incline direction is seen the drawing of liquid crystal indicator again.Circular polarizing disk for example uses down effectively in the situation of the tone of the image of the reflection-type liquid-crystal display device of adjusting color display image etc., in addition, also has the function of reflecting of preventing.As the concrete example of above-mentioned polarizer, enumerate the polarizer of oriented layer of alignment films, the liquid crystal polymer of birefringent film that the film that is made of the polymer that is fit to of Merlon, polyvinyl alcohol, polystyrene, polymethyl methacrylate, polypropylene or other polyolefin, polyarylate, polyamide with the film support stretch processing forms or liquid crystal polymer.Polarizer, for example can be to have and parts with the corresponding phase difference that is fit to such as the application target of the polarizer that is compensated for as purpose at the painted or visual angle that birefringence was caused of various wavelength plates or liquid crystal layer etc., also can be that stacked polarizer more than 2 kinds comes the parts of optical characteristics such as control phase difference.

In addition, above-mentioned ellipsoidal polarizing plate or reflection-type ellipsoidal polarizing plate are to form with the stacked polarizer of suitable combination or reflection type polarizer and polarizer.So-called ellipsoidal polarizing plate etc., though can be by mode with combination (reflection-type) polarizer and polarizer, in turn that these are stacked respectively and form in the manufacture process of liquid crystal indicator, but as optical thin films such as aforesaid ellipsoidal polarizing plates, superior at aspects such as the stability of quality or lamination operation, have and can make liquid crystal indicator etc. make the advantage that efficient improves.

The viewing angle compensation film even be never vertical with drawing, when almost the direction of Qing Xieing is seen the drawing of liquid crystal indicator, can see more brightly that also image ground enlarges the film that the visual angle is used.As this viewing angle compensation polarizer, for example, constitute by material in the oriented layer of alignment films such as phase-contrast film, liquid crystal polymer or transparent material upper support liquid crystal polymer etc.Common polarizer, relative by the birefringent thin polymer film of having of unidirectional stretching with use along its face direction, in the polarizer that uses as the viewing angle compensation film, what use is the birefringent thin polymer film that has along face direction biaxial stretching, perhaps the polymer of the multiple refraction with control thickness direction refractive index that also stretches along the uniaxial tension of face direction and thickness direction or the biaxially oriented film of tilted alignment film class etc.As the tilted alignment film, be set forth in bonding heat-shrinkable film on the thin polymer film, under the effect of the convergent force that produces because of heating,, perhaps make the film of liquid crystal polymer tilted alignment with the film of thin polymer film stretch processing and/or shrink process.The raw material polymer of polarizer, use with the polymer phase that in polarizer before, illustrates with material, can use to prevent by the painted grade that variation was caused at the visual angle of the phase difference of liquid crystal cells or to have enlarged the suitable material of the visual angle of eyesight as purpose.

In addition, reach the purpose of the wide viewing angle of eyesight, preferably can use the optical compensation polarizer that supports the optical anisotropic layer that the tilted alignment layer by the oriented layer of liquid crystal polymer, particularly karaoke machine liquid crystal polymer constitutes with triacetylcellulose film.

The polarizer of the polarizer and the raising brightness film of having fitted, the inner side surface that is set at liquid crystal cells usually uses.Improve the brightness film and be and be used to from the back lighting device of liquid crystal indicator etc. or inboard reflection etc., if natural daylight incident, the rectilinearly polarized light of then reflection regulation polarization axle or the circularly polarized light of prescribed direction, the film of other light transmission characteristics, the stacked polarizer that improves brightness film and polarizer, make light incident from light sources such as back lighting devices, obtain the regulation polarization state see through light the time, the light beyond the afore mentioned rules polarization state does not see through and is reflected.Be by obtaining utilizing reflecting layer of further being located at its rear side etc., make the light counter-rotating of on this raising brightness pellicular front, reflecting, reenter to be mapped to and improve on the brightness film, make its part or all light transmission as the regulation polarization state, see through the increment of the light that improves the brightness film, simultaneously, supply with the polarised light that makes polariscope absorb difficulty, and obtain the increase of utilizable light quantity in the liquid crystal display image demonstration etc., the film that brightness is improved.That is, improve the brightness film not using, in back lighting device etc. from the inboard of liquid crystal cells by under the situation of polariscope incident light, have wide part with the inconsistent polarization direction of polariscopic polarization axle and be polarized mirror and absorb, do not see through polariscope.That is, though according to using polariscopic characteristic difference and different, almost 50% light is polarized the mirror absorption, and like this, utilizable light quantity such as liquid crystal image demonstration reduces the image deepening.Do not make light incide polariscope repeatedly owing to improve the brightness film with the polarization direction that is polarized the mirror absorption, in case on raising brightness film, make its reflection, the reflecting layer of being located at rear side by other makes its counter-rotating, reenter and be mapped to the operation that improves on the brightness film, only becoming in this polarisation of light direction that reflects between the two, reverses can be by the polarised light of polariscopic polarization direction, improving the brightness film sees through it, supply with to polariscope, so can be effectively in the image of liquid crystal indicator shows, use the light of back lighting device etc., can illuminate drawing.

Also can between raising brightness film and above-mentioned reflecting layer etc., diffuser plate be set.Though by the above-mentioned reflecting layer of light directive of the polarization state that improves the reflection of brightness film etc., the diffuser plate that is provided with is removed polarization state in the light that evenly diffuses through, become unpolarized state.That is, diffuser plate makes polarised light recover original natural daylight state.Carry out this unpolarized state repeatedly, promptly the light directive reflecting layer of natural daylight state etc. by reflections such as reflecting layer, reenters by diffuser plate and is mapped to the action that improves on the brightness film.Like this, by the diffuser plate that polarised light is returned to the natural daylight state being set improving between brightness film and the above-mentioned reflecting layer etc., can be when keeping the brightness that shows drawing, reduce brightness inhomogeneous of demonstration drawing, bright drawing is provided equably.Like this, by diffuser plate is set, first incident light increases the number of occurrence of reflection, adds the diffusion function of diffuser plate, and the bright uniformly drawing that shows can be provided.

As above-mentioned raising brightness film, for example, can use the multi-layer laminate of the different film of the plural layers of display medium or refractive index isotropism, see through the rectilinearly polarized light of regulation polarization axle, reflect the film of the characteristic of other light, with at the alignment films of film substrate upper support variable color liquid crystal polymer or its aligned liquid-crystal layer, reflect in left-handed or the dextrorotation either party circularly polarized light, and see through the suitable films such as film of the characteristic of other light.

Therefore, see through on the raising brightness film of type, concentrate polarization axle to be directly incident on polarizer, can in the absorption loss water that suppresses polarizer, it be seen through by making it see through light at the rectilinearly polarized light that makes the afore mentioned rules polarization axle.On the other hand, on the raising brightness film of other circular polarization types that see through the variable color liquid crystal layer, though it is directly incident in the polariscope, by suppressing the absorption loss water aspect, preferably by polarizer with this circularly polarized light rectilinearly polarized lightization, make it incide polarizer.And, as this polarizer,, circularly polarized light can be transformed to rectilinearly polarized light by using 1/4 wavelength plate.

In the wide wave-length coverage of visible region etc. as the polarizer of 1/4 wavelength plate performance function, for example, can be with respect to the light color light of wavelength 550nm the phase separation layer and the phase separation layer of other demonstration phase difference characteristics as 1/4 wavelength plate performance function, for example bring into play the phase separation layer of function overlapping mode as 1/2 wavelength plate.Therefore, be disposed at the polarizer between polarizer and the raising brightness film, can constitute by the phase separation layer more than 1 layer or 2 layers.

And, for the variable color liquid crystal layer, it is the combination that is shaped as the different material of reflection wavelength by doing, the overlapping configuration structure that forms more than 2 layers or 3 layers, can in the wide wave-length coverage of visible region etc., obtain the parts of reflection circle polarised light, based on this, can obtain the circularly polarized light that sees through in the wide wave-length coverage.

In addition, polarizer can be above-mentioned polarised light divergence type polarizer, by polarizer and the stacked parts that constitute of the optical layers more than 2 layers or 3 layers.Therefore, can be reflection-type ellipsoidal polarizing plate or the semi-transmission type ellipsoidal polarizing plate that above-mentioned reflection type polarizer of combination or semi-transmission type polarizer and polarizer form.

Above-mentionedly can use suitable bonding way such as adhesive linkage on stacked.When above-mentioned polarizer or other optical thin film bonding, these optic axises can form suitable arrangement angles corresponding to phase difference characteristics that becomes purpose etc.

On the optical thin film of above-mentioned polarizer or stacked at least 1 layer of polarizer, the adhesive linkage with bonding usefulness of miscellaneous part such as liquid crystal cells can be set also.Though forming the bonding agent of adhesive linkage does not limit especially, but for example, can suitably select polymer with acrylic polymer, silicon base polymer, polyester, polyurethane, polyamide, polyethers, fluorine class or rubber-like etc. serves as that the material of basic polymer uses.Particularly, preferably can use other optical transparences of acrylic-based adhesives good, show the adhesiveness of wettability, coherency and the cementability of appropriateness, the material that weatherability or hear resistance are good.

In addition, on above-mentioned basis, from the foaming phenomenon that prevents to cause or peel off phenomenon because of moisture absorption, prevent that the optical characteristics that is caused by thermal expansion difference etc. from reducing or the burr of liquid crystal cells prevents, even the preferred adhesive linkage that hydroscopicity is low and hear resistance is good is said in the aspects such as formation of the good liquid crystal indicator of high-quality, durability.

Adhesive linkage, for example, can contain the resinae that is added to natural goods or synthetic, particularly pay formations such as adhesive resin or glass fibre, bead, metal powder, other inorganic powders filler or pigment, colouring agent, prevent the additive in the adhesive linkages such as oxidant.Also can be to contain particulate and the diffusible adhesive linkage of display light in addition.

On the single or double of polarizer or optical thin film, set up adhesive linkage, can carry out by rights.As this example, enumerating modulation makes basic polymer or its composition dissolves or is dispersed in adhesive solution by 10～40 weight % sizes in the independent thing of the appropriate solvent of toluene or ethyl acetate etc. or the solvent that mixture constitutes, with suitable expansion mode such as casting mode or application pattern it directly is attached to mode on the polarizer or on the optical thin film, or on above-mentioned standard separator(-ter), form adhesive linkage, again it is transplanted on mode on the polarizer or on the optical thin film etc.

Adhesive linkage, also can be used as different form or the overlapping layer of materials such as kind be arranged on polarizer or optical thin film one side or two-sided on.In addition, under situation about being arranged on two-sided, also can inside and outside polarizer or optical thin film, make the adhesive linkage of different compositions or kind or thickness etc.The thickness of adhesive linkage can corresponding application target or suitably decision such as bonding force, generally is preferably 1～500 μ m, particularly preferred 10～100 μ m.

For the face that exposes of adhesive linkage, up to provide use during, in order to prevent purposes such as its pollution, by the temporary transient bonding covering of separator(-ter).Thus, under common treatment state, can prevent to contact with adhesive linkage.As separator(-ter), except above-mentioned thickness condition, for example, can use in requisition for silicon class or suitable removers such as chain alkyl class, fluorine class or molybdenum sulfide, with plastic sheeting, sheet rubber, paper, cloth, nonwoven, net, foaming sheet or metal forming, these suitable slender lobule bodies such as lamination plate body, the parts etc. that are coated with processing are the suitable parts of standard with existing.

Have again; in the present invention; at polariscope, transparent protective film or the optical thin film etc. that form above-mentioned polarizer; also have in each layer such as adhesive linkage; for example, can be to utilize mode such as the mode handled with ultra-violet absorbers such as salicylate compounds or phenol compound, benzotriazole compound or alpha-cyanoacrylate ester compounds, nickel coordination salt compounds and make it have the parts of ultraviolet radiation absorption function.

Above-mentioned optics (polarizer, optical thin film) can preferably use in the formation of various devices such as liquid crystal indicator.The formation of liquid crystal indicator can be carried out according to standard in the past.Promptly, liquid crystal indicator, though generally by suitably assemble liquid crystal cells and polarizer or optical thin film reach in requisition for component parts such as illuminator, group is gone into drive circuit and is waited and form, but in the present invention, except using polarizer of the present invention or optical thin film aspect, do not limit especially, can be according to standard in the past.Even for liquid crystal cells, for example also can use the material of TN type or any types such as STN type, π type.

One-sided or the double sided arrangements that can be formed on liquid crystal cells has the liquid crystal indicator of polarizer or optical thin film, or uses the suitable liquid crystal indicator of back lighting device or reflecting plate etc. in illuminator.In this case, polarizer of the present invention or optical thin film can be arranged on the one-sided or bilateral of liquid crystal cells.Under the situation that polarizer or optical thin film are set on the bilateral, these can be identical materials, also can be different materials.Have again, when forming liquid crystal indicator, for example, suitable parts such as diffuser plate, anti-dazzle photosphere, antireflection film, baffle, prism array, lens array sheet, light diffusing sheet, back lighting device can be disposed more than 1 layer or 2 layers and go up in position.

Then, Organnic electroluminescent device (organic EL display) is described.Generally, organic EL display is to stack gradually transparency electrode, organic luminous layer and metal electrode on transparency carrier, forms illuminator (organic electroluminescent body).Here, organic luminous layer, it is the duplexer of various organic films, for example, know the duplexer of the luminescent layer that has the hole implanted layer that constitutes by triphenylamine derivative etc. and constitute by fluorescence organic solids such as anthracenes, or the duplexer of the electron injecting layer of formations such as this luminescent layer and perylene derivative, or the formation of the various combinations such as duplexer of these hole implanted layers, luminescent layer and electron injecting layer.

Organic EL display, with by on transparency electrode and metal electrode, applying voltage, inject hole and electronics to organic luminous layer, the energy activating fluorescent material that utilizes these holes to generate with combining again of electronics, the fluorescent material that is energized principle of radiating light when being returned to basic status is luminous.The mechanism that wherein is called combination again is identical with general diode, can envision from these, and the relative voltage that applies with luminous intensity of electric current shows the strong non-linear property that is attended by rectification.

In organic EL display, in order to take out luminous in the organic luminous layer, electrode that must at least one side is transparent, will use as anode with the transparency electrode that indium oxide transparent conductive bodies such as (ITO) forms usually.On the other hand, aspect electronics being injected easily and improve luminous efficiency, it is important using the little material of working function on negative electrode, uses metal electrodes such as Mg-Ag, Al-Li usually.

In the organic EL display of this formation, organic luminous layer is that as thin as a wafer film forms about 10nm with thickness.Therefore, organic luminous layer is also identical with transparency electrode, and light almost completely sees through.Consequently, non-when luminous from the surperficial incident of transparency carrier, see through transparency electrode and organic luminous layer, light by the metal electrode reflection, owing to penetrate to the face side of transparency carrier once more, so from the outside when visual, the display surface of organic EL display can be seen as minute surface ground.

Utilizing voltage application and have transparency electrode on the face side of luminous organic luminous layer containing, have in the organic EL display of organic electroluminescent body of metal electrode simultaneously in the inner face side of organic luminous layer, when can polarizer be set, between this transparency electrode and polarizer, polarizer is set in the face side of transparency electrode.

Polarizer and polarizer are owing to have the effect of the light polarization that will come from outside incident and by metal electrode reflection, so have the effect of minute surface that can not visual metal electrode from the outside according to this polarization.Particularly, constitute polarizer, and, then can cover the minute surface of metal electrode fully if polarizer is adjusted into π/4 with the angle that the polarization direction became of polarizer by 1/4 wavelength plate.

That is, incide the exterior light of this organic EL display, only see through rectilinearly polarized light by polarizer.Though it be 1/4 wavelength plate and polarizer with the angle that the polarization direction became of polarizer is π/4 o'clock that this rectilinearly polarized light utilizes polarizer generally to become elliptically polarized light, particularly polarizer, becomes circularly polarized light.

This circularly polarized light sees through transparency carrier, transparency electrode, organic film, by the metal electrode reflection, sees through organic film, transparency electrode, transparency carrier once more, becomes rectilinearly polarized light on polarizer once more.And, this rectilinearly polarized light, since vertical with the polarization direction of polarizer, so can not see through polarizer.Consequently, can cover the minute surface of metal electrode fully.

(embodiment)

Then, embodiment and comparative example are described.As stacked, prepare 50 pieces and require the polarization film that uses in the liquid crystal indicator of machining accuracy or fine finishining precision, stacked at thickness direction.Stacked rectangular dimension is 255mm * 195mm, cuts off processing with die-cut with cutter.Machining is carried out with method shown in Figure 1.Finishing size after the cutting face is 250mm * 190mm.

At first, utilize Fig. 3 that the clamping region (shape of compaction tool) of embodiment is described.The clamping region of Fig. 3 (a) expression upper face side, (b) clamping region of side below the expression.Top and bottom and four jiaos all are included in the clamping region.Upper face side, a pair of long limit 3a and the minor face 3b that face mutually form non-clamping region.Following side is along the complete cycle and the diagonal formation clamping region of rectangle.Four jiaos and complete cycle of said here expression clamped position are meant the position among stacked after the machining, and when on this position stacked being clamped, stacked predetermined cutting tip is in the state that exposes from clamping region.Yet, use under the situation of flexible material at material as clamp mechanism, can be with this clamp mechanism and stacked cutting simultaneously.If the area of rectangle is made as S, then the clamping area of upper face side is S * 0.12 (12%), below the clamping area of side be S * 0.48 (48%), amount to 30%.

Fig. 4 represents the clamping region of comparative example 1.Shown in figure (a), upper face side is that the complete cycle of rectangle is clamped, (b) too.(b) formation with embodiment is identical.The clamping area of upper face side is 40%, below the clamping area of side be 48%, amount to 44%.

Fig. 5 represents the clamping region of comparative example 2.Shown in figure (a), upper face side is to have only the complete cycle of rectangle clamped, and is (b) same with the 1st comparative example.The clamping area of upper face side is 26%, below the clamping area of side be 48%, amount to 37%.

Then, evaluation result under the situation of machining was carried out in expression in following.To MD direction (draw direction), TD direction (direction vertical with draw direction), asking for above-mentioned 250mm * 190mm is standard deviation under the situation of target size.And, sample number n=15.

(table 1)

Can know also that from this table the value of deviation is less among the embodiment.Comparative example 1 is because the clamping area is excessive, so deviation becomes greatly.Though it is suitable that comparative example 2 clamps areas since with the rectangle complete cycle of upper face side as clamping region, so deviation becomes greatly.Therefore, know that cutting process of the present invention is superior.

(other embodiments)

Clamping region shown in Figure 3 is expression 1 example, is not limited thereto.

Claims (4)

1. one kind stacked cutting working method is that the stacked section that will be cut to rectangle cuts method for finishing manufactured, it is characterized in that,

It possesses: under the state overlapping many pieces stacked along thickness direction, by clamp mechanism with many pieces stacked operation that clamps from two surface direction up and down; With

Clamping under the many pieces stacked state, by the operation of the section of cutting mechanism cutting lay lamination,

Wherein, total clamping area on stacked two surfaces up and down of above-mentioned clamp mechanism be stacked above-mentioned rectangular area twice 5～40%, in clamping region, comprise four jiaos of above-mentioned rectangle, on a pair of long limit or at least one side in the pair of short edges that constitute above-mentioned rectangle, set the non-clamping region that is not clamped, and should only be set in upper surface side by non-clamping region by above-mentioned clamp mechanism.

2. cutting working method according to claim 1 stacked, wherein, below the clamping area of side be set at also bigger than the clamping area of upper face side.

3. cutting working method according to claim 1 stacked, wherein, the clamp mechanism in the clamping region is used flexible material.

4. cutting working method according to claim 1 stacked, wherein, above-mentioned stacked is the optical thin film material.

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