CN1302298C - Method for mfg. polaroid and liquid crystal display device - Google Patents
Method for mfg. polaroid and liquid crystal display device Download PDFInfo
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- CN1302298C CN1302298C CNB01130362XA CN01130362A CN1302298C CN 1302298 C CN1302298 C CN 1302298C CN B01130362X A CNB01130362X A CN B01130362XA CN 01130362 A CN01130362 A CN 01130362A CN 1302298 C CN1302298 C CN 1302298C
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Abstract
The present invention provides a manufacturing method of polarizing filters and a liquid crystal display device. The polarizing filter can not generate recording concave convex channels on a surface of a protective layer because of extension of a polarizing film, vivid reflected images can be obtained even if the channels are reflected, and simultaneously the external appearance is also improved. When a protective layer is pasted on one surface or both surfaces of a polarizing mirror, moisture regain of the polarizing mirror is within a range of 5% to 30%, wherein the moisture regain of the polarizing mirror is measured according to the weight (A) of the polarizing mirror before the protective layer is pasted and the weight (B) of the polarizing mirror which is put into a dryer for drying for 7 hours at 120 DEG C, and the moisture regain of the polarizing mirror is calculated according to the following formula: moisture regain (%)=[(A-B)/B]*100.
Description
Technical field
The present invention relates to the manufacture method of the polaroid that uses in the liquid crystal indicator (below, be called for short LCD sometimes) and have the liquid crystal indicator of the polaroid that obtains thus.In more detail; the present invention relates to the manufacture method and the liquid crystal indicator of polaroid; this polaroid can not produce the ditch shape that writes down because of the extension of polarization film on the protective seam surface concavo-convex; even also can obtain distinct reflected image by reflection, apparent problem also is improved simultaneously.
Background technology
LCD uses in personal computer etc., and the trend of rapid increase is arranged in recent years.The purposes of LCD is more and more wider, also uses LCD in recent years in the monitor.
With having dichromatic iodine or dyestuff, produce polaroid with boric acid or borax etc. after crosslinked again to after the PVA film dyeing.Have again, carry out uniaxial extension at dyeing process and crosslinked operation, but this extension can in operation, carry out, also can carry out in the front and back of this operation.After dyeing process and crosslinked operation, usually, use dryer etc. carries out drying, and uses protective seams such as bonding agent and triacetyl cellulose (TAC) film to paste, and produces polaroid like this.
The polaroid that uses in the liquid crystal indicator all requires to improve to transmissivity and degree of polarization.For transmissivity and the degree of polarization that makes polaroid all improves, be necessary to make extension ratio raising as raw-material PVA (polyvinyl alcohol (PVA)) film of polaroid.But if the extension ratio of PVA improves, then on polariscopic surface, the ditch shape that is easy to generate record on bearing of trend is concavo-convex, and outward appearance is plain.In addition, the ditch shape of this record is concavo-convex also influential to TAC or the poly terephthalic acid ethylene glycol film sections such as (PET) pasted as diaphragm, also has the ditch of record shape concavo-convex because of looking above protective seam; so if see again after the reflection; then reflected image is fuzzy, so, there is apparent problem.
Summary of the invention
The present invention proposes in order to address the above problem; its purpose is to provide a kind of manufacture method and liquid crystal indicator of polaroid; this polaroid can not produce the ditch shape that writes down because of the extension of polarization film on the protective seam surface concavo-convex; even also can obtain distinct reflected image by reflection, outward appearance also is improved simultaneously.
In order to achieve the above object; the manufacture method of polaroid of the present invention is to make polariscopic one or both sides to paste protective seam, transmissivity more than 35%; degree of polarization is in the method for the polaroid more than 90%, it is characterized in that the polariscopic regain when pasting with protective seam is 5%～30%.The assay method of polariscopic regain is to put into 120 ℃ the polariscopic weight (B) of dryer after dry 7 hours to obtain with polariscopic regain (%)=[(A-B)/B] * 100 according to polariscopic weight (A) before pasting with this polariscope.
Less than 5% o'clock, the polariscope hardening produced concavo-convex on the record ditch in polariscopic regain, and then, there is the problem that crosslinking chemical and outward appearance shortcoming increase of from polariscope, separating out easily.In addition, when regain surpassed 30%, washiness took place bonding badly when pasting with protective seam such as TAC easily, and the dried after pasting by TAC is because of the decolouring of iodine produces irregular in polarization is unilateral.In above-mentioned situation, the ideal range of polariscopic regain is 9%～27%.
In said method, the surfaceness of the direction vertical with the bearing of trend of polaroid is calculated according to center line average roughness and is preferably in below the 0.04 μ m.If surpassing 0.04 μ m eyes finds out irregular easily.Be irregular outstanding easily.Ideal situation is wished surfaceness below 0.01 μ m, if within this scope, then reaches the level that eyes misknow striped.
Above-mentioned surfaceness has been done definition in JIS B 0601-1944.
In addition, in said method, preferably polariscope and protective seam are pasted together through adhesive linkage.Thus, can prevent peeling off of polariscope and protective seam.
In addition, in said method, the most handy dye bath with dichromatic iodine or dichroic dye that comprises dyes to the hydrophilic macromolecule film, and it is crosslinked to use the crosslinked bath that comprises crosslinking chemical to carry out, and extends simultaneously, makes polariscope like this.As the hydrophilic macromolecule film, the good polyvinyl alcohol film of dyeability preferably.
In the present invention, also can with reflecting plate or semi-transparent reflecting plate lamination on the polaroid of making by said method, form reflection type polarizer or semi-transparent reflection type polarizer.
In addition, also can with polarizer or λ sheet lamination on the polaroid of making by said method, form ellipse or circular polarizing disk.
In addition, also can with the viewing angle compensation thin film lamination on the polaroid of making by said method, form polaroid.
In addition, also can briliancy be promoted thin film lamination on the polaroid of being made by said method, form polaroid by cement or bonding agent.
Secondly, liquid crystal indicator of the present invention is characterised in that: at least one side at liquid crystal cells has the polaroid of being made by said method.
Embodiment
In the manufacturing process of polaroid of the present invention; obtain having the polariscope of polarization function by the raw-material PVA film as polaroid being carried out operations such as swelling, dyeing, extension, crosslinked, drying; then; use cement or bonding agent that films such as TAC or PET are sticked on this polariscope as protective seam, obtain polaroid.
In polariscopic manufacturing process, swelling, dyeing, extension, crosslinked these 4 operations do not have special provision to the order of operation, in addition, can 2～4 operations be carried out simultaneously fully.
In the present invention, as the concavo-convex method that does not take place of ditch shape of the record that polariscope or polaroid are taken place, the polariscopic regain when polariscope and protective seam are pasted is 5%～30% can solve the concavo-convex method of ditch shape of the record that polaroid takes place.
Have again; generally also can adopt resulting polariscopes such as the PVA film being carried out swelling, dyeing, extension, crosslinked, drying temporarily is rolled into tubular; this polariscope carried out processing such as humidification thereafter; polariscopic regain is carried out damping, paste the continuous mode of production on the protective seams such as TAC film then.
Method for manufacturing polarizer can be divided into 3 operations substantially, that is, ' dyeing process ' that the PVA film is dyeed in the bath of having put into iodine with 2 look characteristics or dyestuff, carry out crosslinked ' crosslinked operation ' and carry out ' extension process ' that PVA extends in the bath of having put into PVA crosslinking chemicals such as boric acid or borax.Have, ' extension process ' carries out simultaneously with ' dyeing process ', ' crosslinked operation ' mostly usually, but also can carry out in different operations again.In addition, dyeing process and crosslinked operation are carried out simultaneously.After above-mentioned 3 operations, polariscope is carried out drying, will be as film applyings such as triacetyl cellulose (TAC) film of protective seam or poly terephthalic acid ethylene glycol (PET) films in its one or both sides, thus produce polariscope.
As polariscope (polarizing coating), suitable processing such as the dyeing that can use the film that the suitable vinol series polymer that is used in the past by the polyvinyl alcohol (PVA) of hydrophilic macromolecule film, for example polyvinyl alcohol (PVA) or part formolation etc. is formed with suitable order or mode to carry out the dichroic substance that formed by iodine or dichroic dye etc. is handled, extension processing and crosslinking Treatment, the suitable polariscope that linearly polarized light is seen through.Particularly, the good polariscope of transmissivity and degree of polarization preferably.
In the present invention, in order to obtain the polaroid of high-transmission rate, high degree of polarization, preferably use to thickness be 10～200 μ m, the hydrophilic macromolecule film etc. that is preferably 30～80 μ m carries out that the overall elongation multiplying power is 4～7 times, particularly the polariscope (polarizing coating) that forms is handled in 5～6.5 times extension.When overall elongation multiplying power during, can not get enough degree of polarizations less than 4 times.When the overall elongation multiplying power surpasses 7 times, rupture easily during because of extension, so be difficult to produce stable polarizing coating.In addition, when the thickness of the hydrophilic macromolecule film that extends etc. during less than 10 μ m, make the extension difficulty because of extension fracture takes place, when surpassing 200 μ m, be difficult to drying during film forming, cause bad phenomenon such as foaming easily, or the inhomogeneous of drying taken place in pellicular front easily, when polarizing coating was made, this uneven part became uneven dyeing, therefore, this in bad order.In addition, when film is thicker, occur the inhomogeneous of swelling and dyeing easily when polarizing coating is made, this situation is also bad.
The diaphragm material that becomes protective clear layer as being located at polariscope (polarizing coating) one or both sides can use suitable transparent membrane.Example as this polymkeric substance, generally using the acetate resemble the triacetyl cellulose is resin, but be not limited to this, also can use polycarbonate-based resin, polynorbornene is that resin, poly terephthalic acid ethylene glycol polyester based resins such as (PET), polyethersulfone are clear films such as polyolefin-based resins such as resin, polyamine acyl resin, polyimide resin, tygon, polystyrene resin and propylene base system resin, or the resin film of thermmohardening type such as propylene base system, urethane system, propenyl urethane system, epoxy system and silicon system and even UV cured type etc.
From aspects such as polarization characteristic and permanance, handy especially transparent protective film is that the triacetylcellulose film that saponification was handled has been carried out with alkali etc. in the surface.Have again, when the both sides at polarizing coating are provided with transparent protective film, also can use the transparent protective film that forms by different polymkeric substance in the table etc.
The transparent protective film that uses in the protective seam as long as do not hinder purpose of the present invention, also can be to have carried out dura mater processing, antireflection processing and in case the transparent protective film that adhesion and diffusion and even anti-dazzle etc. are handled for purpose.Dura mater is handled and to be carried out in order to prevent the polaroid surface tear, for example, can utilize the hardness of the uv-hardening resin that silicon system etc. is suitable and smooth property etc. all well cured film be attached to the formation such as mode on the surface of transparent protective film.
On the other hand, the antireflection processing is carried out in the polaroid surface reflection in order to prevent ambient light, can wait by the antireflection film that formation was used in the past and realize.In addition; anti-adhere to that to handle be in order to prevent bonding with adjacent layer; it is processing in order to prevent that thereby ambient light from carrying out the identification of the light that sees through polaroid etc. in the surface reflection influence of polaroid that anti-dazzle is handled; for example; can utilize suitable modes such as surface coarsening modes such as for example sandblast mode or embossing processing mode or the atomic mode of mixed transparent; form fine concaveconvex structure on the surface of transparent protective film, form polaroid thus.
For example can enumerate silicon dioxide and aluminium oxide, titania and zirconia, tin oxide and indium oxide, cadmium oxide and antimony oxide etc. that mean grain size is 0.5～20 μ m in the above-mentioned transparent particulate, can use inorganic fine particles, also can use organic system particulate that forms by crosslinked or uncrosslinked granular thing of polymkeric substance etc. etc. with electric conductivity.The transparent resin of general per 100 unit of weights of transparent atomic use amount is 2～70 unit of weights, preferably 5～50 unit of weights.
The anti-dazzle photosphere of mixed transparent particle can be used as protective clear layer itself or as to the coating setting of transparency protected laminar surface.Thereby anti-dazzle photosphere also can be used for spreading the diffusion layer (viewing angle compensation function etc.) that enlarges the visual angle through the light of polaroid by double as.Have, conducts such as above-mentioned anti-reflection layer and anti-adhesion layer, diffusion layer and anti-dazzle photosphere also can be used as the layer that is independent of protective clear layer and is provided with by the optical layers that thin slice that is provided with these layers etc. forms again.
In the present invention; have no particular limits to polariscope (polarizing coating) with as the bonding processing of the transparent protective film of protective seam, but can be undertaken by the bonding agent that for example forms by vinyl alcohol system polymer or the bonding agent that forms by the water-soluble cross-linker of vinyl alcohol system polymers such as boric acid and borax, glutaraldehyde and melamine, bromic acid at least etc.Particularly, from the best this point of the cementability of polyvinyl alcohol film, preferably use the ethenol system bonding agent.This adhesive linkage can be used as the formation such as coating drying layer of aqueous solution, but when this aqueous solution of modulation, in case of necessity, also can mix catalyzer such as other adjuvant or acid.
Polaroid of the present invention can be used as the optics that forms with other optical laminated layer back and uses when practical application.This optical layers is not particularly limited, for example, can use reflecting plate or semi-transparent reflecting plate, polarizer (comprising λ plates such as 1/2 wavelength plate, 1/4 wavelength plate), viewing angle compensation film or briliancy to promote the optical layers more than 1 layer or 2 layers such as film, this optical layers is applicable to the formation of liquid crystal indicator etc.Especially; preferably and then with reflecting plate or semi-transparent reflecting plate lamination on the polaroid that polariscope and protective seam by the invention described above form and form reflection type polarizer or semi-transparent reflection type polarizer; and then the polarizer lamination formed ellipse or circular polarizing disk on the polaroid that polariscope and protective seam by the invention described above form; and then the viewing angle compensation thin film lamination formed polaroid on the polaroid that polariscope and protective seam by the invention described above form, perhaps and then briliancy is promoted thin film lamination on the polaroid that polariscope and protective seam by the invention described above form, form polaroid.
Said reflection plate is described, reflecting plate is that it is located at the parts that are used for forming reflection type polarizer on the polaroid, reflection type polarizer is located at the inboard of liquid crystal cells usually, can form and make the liquid crystal indicator that shows this type after the incident light reflection of watching side (demonstration side) etc., have the light sources such as bias light of dress in can omitting, realize the advantages such as slimming of liquid crystal indicator easily.
The formation of reflection type polarizer can be undertaken by the suitable modes such as mode of setting up the reflection horizon that is formed by metal etc. on faces at polaroid such as above-mentioned transparent protective film in case of necessity.Subsidiary making a point as object lesson, can be enumerated in case of necessity and set up the example that the paper tinsel that formed by reflective metal such as aluminium or vapor-deposited film form the reflection horizon on a face of the transparent protective film that hair side was handled.
In addition, can also enumerate the example that contains particulate on the surface and be the reflection type polarizer etc. in the reflection horizon that has this micro concavo-convex structure of reflection on the above-mentioned transparent protective film of surperficial micro concavo-convex structure.Thereby the reflection horizon with surperficial micro concavo-convex structure has and can prevent to make incident light diffusion make directive property variation and dazzling appearance and suppress advantages such as light and shade is irregular because of irregular reference.The formation in the micro concavo-convex structure reflection horizon of the surperficial micro concavo-convex structure of reflection transparent protective film; for example can be by suitable modes such as evaporation mode such as vacuum evaporation mode, ion plating mode, sputter mode or plating modes, utilize the methods such as surface that metal directly is attached to transparent protective film to carry out.
In addition, reflecting plate also can not adopt the mode on the transparent protective film that directly is attached to above-mentioned polaroid, and as on the suitable film that with this transparent protective film is standard, the uses such as reflector plate that the reflection horizon forms being set.Because of the reflection horizon of reflecting plate is formed by metal usually; thereby so keep the initial reflectance this point for a long time and, preferably to adopt the use form that this reflecting surface is covered with film or polaroid etc. because of oxidation reduces reflectivity from preventing from avoiding setting up the protective seam this point in addition.
Have again, semi-transparent type polaroid can by in these cases with the reflection horizon as not only making the light reflection but also the reflection horizon of semi-transparent type of the half-reflecting mirror etc. of light transmission being obtained.Semi-transparent type polaroid is located at the inboard of liquid crystal cells usually, can form the liquid crystal indicator of following type etc., when liquid crystal indicator etc. uses under brighter environment, can make after the incident light reflection of watching side (demonstration side) and carry out the image demonstration, under darker environment, the built-in light sources such as bias light that are contained in the rear side of semi-transparent type polaroid in the use come display image.That is, semi-transparent type polaroid can be saved the energy that light source such as bias light uses under bright environment, and, be of great use for the formation of the liquid crystal indicator of this type that under darker environment, can also use built-in light source etc.
Secondly, illustrate on the polaroid that forms by aforesaid polariscope of the present invention and protective seam and then lamination polarizer and the ellipse or the circular polarizing disk that obtain.
When linearly polarized light being become ellipse or circularly polarized light, ellipse or circularly polarized light are become linearly polarized light, or when changing the polarization direction of linearly polarized light, use polarizer etc., especially, as making linearly polarized light become ellipse or circularly polarized light, making ellipse or circularly polarized light become the polarizer of linearly 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 linearly polarized light usually.
Ellipsoidal polarizing plate compensates painted (blue or yellow) that the birefringence by the liquid crystal layer of STN type liquid crystal indicator produces, and can be used to not to be with the situation of above-mentioned painted white and black displays effectively.And then control 3 dimension refractive indexes preferably also can compensate painted that (preventing) produces when tilted direction is seen the liquid crystal indicator picture.Adjust the situations such as tone of the image of reflection-type liquid-crystal display device when circular polarizing disk for example can be used for color display effectively, in addition, also have the function of reflecting of preventing.
By the way, object lesson as above-mentioned polarizer, can enumerate the film that is formed by the suitable polymkeric substance as polycarbonate and polyvinyl alcohol (PVA), polystyrene and polymerthyl acrylate, polypropylene and other polyolefin, polyaryl and polyamide is extended the complex index of refraction film handling and forms or the oriented film of liquid crystal polymer, perhaps by the oriented layer of film support liquid crystal polymer etc.In addition, film as tilted alignment, for example can enumerate heat-schrinkable film and thin polymer film are bonded together, by heating, the film that under the effect of its convergent force thin polymer film is extended processing and/or shrink process and form perhaps makes the tiltedly film etc. of orientation of liquid crystal polymer.
Secondly, illustrate on the polaroid that forms by aforesaid polariscope of the present invention and protective seam and then lamination viewing angle compensation film and the polaroid that obtains.
Even the viewing angle compensation film is to be used to widen the visual angle not from perpendicular to the direction of the picture of liquid crystal indicator and also can see the film of the image of comparison distinctness when tilted direction is seen picture.
As such viewing angle compensation film, can use the film that on triacetyl cellulose etc., has applied discoid liquid crystal and formed, or polarizer.Common polarizer uses the thin polymer film with many refractions of extending on an axle of its in-plane, in contrast, the polarizer that uses as the viewing angle compensation film then uses the thin polymer film with many refractions of extending on two axles of in-plane, or uses the 2 direction extension films that resemble the tilted alignment thin polymer film with refractive index that extend on an axle of in-plane and also extend at thickness direction, the control thickness direction etc.As the tilted alignment film, as previously mentioned, for example can enumerate heat-schrinkable film and thin polymer film are bonded together, by heating, the film that under the effect of its convergent force thin polymer film is extended processing and/or shrink process and form perhaps makes the tiltedly film etc. of orientation of liquid crystal polymer.The starting material polymkeric substance of polarizer can use and the polymkeric substance identical materials that had illustrated in polarizer just now.
The polaroid of pasting briliancy lifting film and obtain on the polaroid that is formed by aforesaid polariscope of the present invention and protective seam is located at the inboard of liquid crystal cells usually and uses.Briliancy promotes film and demonstrates when natural light incident; thereby the linearly polarized light of the reflection regulation polarization axles such as reflection that utilize the bias light of liquid crystal indicator etc. or come from the inboard or the circularly polarized light of prescribed direction make the characteristic of other light transmission; briliancy is promoted the polaroid of thin film lamination on the polaroid that is formed by above-mentioned polariscope and protective seam enters and the transmitted light of the polarization state that obtains stipulating the light incident that comes from light sources such as bias lights; simultaneously, light beyond the polarization state of afore mentioned rules is not seen through and be reflected.Promoting the light that reflects on pellicular front and then the reflection horizon by being located at its rear side etc. in this briliancy reenters after anti-phase and is mapped on the briliancy riser, make the light transmission of the polarization state of its partly or entirely conduct regulation, thereby seek to increase the light quantity that promotes film through briliancy, simultaneously, provide the polarized light that is difficult to absorb to seek to increase available light quantities such as liquid crystal image demonstration to polariscope, can improve briliancy thus.That is, when do not use briliancy promote film, with bias light etc. from the inboard of liquid crystal cells and during incident light by polariscope, have light with the inconsistent polarization direction of polariscopic polarizing axis and almost all be polarized mirror and absorb, thereby do not see through polariscope.That is,, absorb, correspondingly reduced available light quantities such as liquid crystal image, make the image deepening but there is about 50% light to be polarized mirror although different because of the difference of the polariscopic characteristic used.Briliancy promotes film makes the light with the absorbent polarization direction of polariscope not incide on the polariscope, make its reflection and promote film by briliancy, after the reflection horizon that is located at rear side is anti-phase, reenter and be mapped on the briliancy riser, repeat said process, briliancy promotes film and direction of polarized light is become be imaged on polariscope and briliancy to promote between the film reflection and anti-phase polarisation of light direction to see through by the such polarized light of polariscope and resupply polariscope, show so can effectively light such as bias light be used for the image of liquid crystal indicator, can make picture become bright.
Promote film as above-mentioned briliancy, for example can use many laminations layer body as the dielectric multilayer film film different with the refractive index anisotropy, linearly polarized light with polarization axle of the regulation of making sees through and makes the film (' D-BEF ' of 3M company etc.) of the characteristic of other light reflection, or picture lays cholesteric on the film matrix material, the particularly oriented film of cholesteryl liquid crystal polymkeric substance or oriented layer and the film that forms (day eastern electrician's corporate system ' PCF350 ', Merck corporate system ' Transmax ') such, have the suitable films such as film that make left-handed or right-circularly polarized light reflection and make the characteristic of other light transmission.
Therefore, promote in the film, be directly incident on the polaroid, can suppress the absorption loss that polaroid causes and improve light transmission efficiency by this transmitted light is alignd with polarization axle in the briliancy of the above-mentioned type that the linearly polarized light of the polarization axle that makes regulation sees through.On the other hand, the briliancy that sees through the circularly polarized light type resembling the cholesteryl liquid crystal layer promotes in the film, though also can be directly incident on the polariscope, but be mapped on the polaroid from reentering the circularly polarized light that suppresses the absorption loss this point, preferably make to see through becomes linearly polarized light through polarizer after.As this polarizer, circularly polarized light can be transformed into linearly polarized light by using 1/4 wavelength plate.
The polarizer that plays 1/4 wavelength plate effect in the wide wavelength coverage of visible light can be by will being the monochromatic light such as light of the 550nm phase separation layer that plays 1/4 wavelength plate effect and have the phase separation layer of other phase difference characteristics, for example play the overlapping mode of the phase separation layer of 1/2 wavelength plate effect and obtain to for example wavelength.Therefore, the polarizer that is configured between polaroid and the briliancy lifting film can be the polarizer that is formed by the phase separation layer more than 1 layer or 2 layers.
Have again, for the cholesteryl liquid crystal layer, the layers different by combined reflected wavelength form configuration structure overlapping more than 2 layers or 3 layers, can obtain the polaroid at the wide wavelength coverage internal reflection of visible light circularly polarized light, thus, can obtain the circularly polarized light that sees through of wide wavelength coverage.
Have, polaroid of the present invention also can form polaroid and the optical laminated layer back more than 2 layers or 3 layers as the polaroid of above-mentioned polarized light divergence type again.Therefore, also can be reflection-type ellipsoidal polarizing plate that polarizer and above-mentioned reflection type polarizer or the combination of semi-transmission type polaroid are formed or semi-transmission type ellipsoidal polarizing plate etc.With the optical component behind the optical laminated layer more than 2 layers or 3 layers is to form in the mode of indivedual laminations in turn in the manufacture process of liquid crystal indicator etc., but carries out the advantage that lamination has steady quality, easy to assembly, the manufacturing efficient that can improve liquid crystal indicator etc. in advance as optical component.Have again, when lamination, can use suitable adhesion means such as adhesive linkage.
In polaroid of the present invention or optical component, also can be provided with and the bonding adhesive linkages of other member such as liquid crystal cells.This adhesive linkage can be formed by the suitable bonding agent that used of propylene base system in the past.Wherein, from the foamed phenomenon that prevents to cause with peel off phenomenon because of moisture absorption, prevent that the optical characteristics that causes because of thermal expansion difference etc. from reducing and the bending of liquid crystal cells, thereby, from the liquid crystal indicator this point of the high-quality good endurance of easy formation, the adhesive linkage of low, the good heat resistance of hydroscopicity preferably.In addition, also can be contain particulate and have the light diffusion property adhesive linkage etc.In case of necessity, adhesive linkage can be located on the necessary face, for example, for the protective seam of the polaroid that is formed by polariscope of the present invention and protective seam, in case of necessity, can adhesive linkage be set on the face or the two sides of protective seam.
When the adhesive linkage that is provided with on polaroid or the optical component when expose on the surface, in order to prevent that adhesive linkage from taking place to pollute etc. before using, the most handy spacer is made interim outer cover.Spacer can be by the stripping film that is formed by suitable removers such as silicon system or chain alkyl system, fluorine system and molybdenum sulfides be set on the suitable thin slice that with above-mentioned transparent protective film is sample in case of necessity mode etc. form.
Have again, form the polarizing coating of above-mentioned polaroid or optical component and each layers such as transparent protective film, optical layers and adhesive linkage and also can make it have the UVA energy by for example using ultraviolet light absorber such as salicyl acid esters based compound and benzophenone based compound, benzotriazole based compound and alpha-cyanoacrylate salt compound, nickel complex salt based compound suitable mode such as to handle.
Polaroid of the present invention can perform well in the formation of various devices such as liquid crystal indicator.Liquid crystal indicator can have polaroid of the present invention is configured in infiltration type, the reflection-type that the one or both sides of liquid crystal cells form or see through, the suitable structure to be as the criterion in the past such as reflection dual-purpose type.Therefore, the liquid crystal cells that forms liquid crystal indicator is arbitrarily, also can be to use for example be with the film transistor type representative active matrix drive-type liquid crystal cells or be the liquid crystal cells of the driving adequate types such as liquid crystal cells of the simple matrix of representative with twisted nematic or super-twist nematic.
In addition, when the both sides at liquid crystal cells were provided with polaroid or optical component, they can be identical parts, also can be different parts.And then, when liquid crystal indicator forms, for example, can go up prism array sheet or the suitable members such as lens array plate, light diffusing sheet or background light source of configuration more than 1 layer or 2 layers in position.
Use following examples and comparative example now and then specify the present invention.
(embodiment 1)
Use the PVA film (9X75RS of Network ラ レ system, registration 2400, thickness 75 μ m), bathe (the aqueous solution that contains iodine and potassium iodide the 1st, 30 ℃ of temperature) after carrying out 3 times of extensions in, in the 2nd bath (aqueous solution that contains boric acid and potassium iodide, 55 ℃ of temperature), extend, obtain polariscope with 6 times overall elongation multiplying power.Then, use dryer and humidifier, adjust temperature, humidity, air quantity and time, polariscopic regain is adjusted to after 6%, using PVA is bonding agent, with TAC (triacetyl cellulose) film applying on polariscopic two sides, thereby produce polaroid.
(embodiment 2)
Use the PVA film (9X75RS) of Network ラ レ system, after carrying out 3 times of extensions in the 1st bath (aqueous solution that contains iodine and potassium iodide, 30 ℃ of temperature), bathe (the aqueous solution that contains boric acid and potassium iodide the 2nd, 55 ℃ of temperature) the overall elongation multiplying power with 6 times in is extended, and obtains polariscope.Then, use dryer and humidifier, adjust temperature, humidity, air quantity and time, polariscopic regain is adjusted to after 15%, using PVA is bonding agent, with TAC (triacetyl cellulose) film applying on polariscopic two sides, thereby produce polaroid.
(embodiment 3)
Use the PVA film (9X75RS) of Network ラ レ system, after carrying out 3 times of extensions in the 1st bath (aqueous solution that contains iodine and potassium iodide, 30 ℃ of temperature), bathe (the aqueous solution that contains boric acid and potassium iodide the 2nd, 55 ℃ of temperature) the overall elongation multiplying power with 6 times in is extended, and obtains polariscope.Then, use dryer and heating machine, adjust temperature, humidity, air quantity and time, polariscopic regain is adjusted to after 26%, using PVA is bonding agent, with TAC (triacetyl cellulose) film applying on polariscopic two sides, thereby produce polaroid.
(comparative example 1)
Use the PVA film (9X75RS) of Network ラ レ system, after carrying out 3 times of extensions in the 1st bath (aqueous solution that contains iodine and potassium iodide, 30 ℃ of temperature), bathe (the aqueous solution that contains boric acid and potassium iodide the 2nd, 55 ℃ of temperature) the overall elongation multiplying power with 6 times in is extended, and obtains polariscope.Then, use dryer and humidifier, adjust temperature, humidity, air quantity and time, polariscopic regain is adjusted to after 4%, using PVA is bonding agent, with TAC (triacetyl cellulose) film applying on polariscopic two sides, thereby produce polaroid.
(comparative example 2)
Use the PVA film (9X75RS) of Network ラ レ system, after carrying out 3 times of extensions in the 1st bath (aqueous solution that contains iodine and potassium iodide, 30 ℃ of temperature), bathe (the aqueous solution that contains boric acid and potassium iodide the 2nd, 55 ℃ of temperature) the overall elongation multiplying power with 6 times in is extended, and obtains polariscope.Then, use dryer and humidifier, adjust temperature, humidity, air quantity and time, polariscopic regain is adjusted to after 35%, using PVA is bonding agent, with TAC (triacetyl cellulose) film applying on polariscopic two sides, thereby produce polaroid.But because of regain is 35%, moisture is higher, the dried when fitting with TAC produces irregular in the face of polaroid.
The polaroid that is obtained by the foregoing description 1～3 and comparative example 1～2 is assessed, measured the transmissivity and the degree of polarization of monomer as optical characteristics.Use surfaceness form measuring instrument (the accurate system in Tokyo, surfaceness form measuring instrument: サ-Off コ system 470A) to measure the concavo-convex equispaced (Sm) of center line average roughness (Ra) and formation striped.In addition, utilize eyes to observe identification whether striped is arranged.Its result is as shown in table 1.
Table 1
| Polariscope regain (%) | Polaroid | Range estimation is judged | ||||
| Transmissivity (%) | Degree of polarization (%) | The mensuration of concave-convex surface | ||||
| Ra(μm) | Sm(mm) | |||||
| Comparative example 1 embodiment 1 embodiment 2 embodiment 3 comparative examples 2 | 4 6 15 26 35 | 43.8 43.8 43.8 43.8 43.8 | 99.95 99.95 99.94 99.95 99.90 | 0.08 below 0.03 0.01 below 0.01 below 0.01 | 0.75 1.81 can not measure and can not measure and can not measure | There is the not obvious no striped of tangible striped striped not have striped and do not have striped |
As shown in Table 1, polaroid of the present invention (embodiment 2～3), (Ra) is low for the center line average roughness of its surfaceness, and concavo-convex equispaced (Sm) can not measure, and judges no striped according to range estimation.In the polaroid of embodiment 1, it is not obvious to observe striped with eyes, no problem in the practicality.
Relative therewith, the polaroid of comparative example 1 because of damp condition outside scope of the present invention, so the center line average roughness of surfaceness (Ra) is low, concavo-convex equispaced (Sm) is big, judges that according to range estimation striped is arranged.The polaroid of comparative example 2, center line average roughness of its surfaceness (Ra) and concavo-convex equispaced (Sm) are though good, and the degree of polarization of optical characteristics is poor, and then, in face, can see irregularly, outward appearance is not so good.
As described above; the manufacture method of polaroid of the present invention; when protective seam is sticked on polariscopic one or both sides; above-mentioned polariscopic regain is 5%～30%, thus, can provide a kind of manufacture method and liquid crystal indicator of polaroid; the ditch shape that the record that extension because of polarizing coating causes on the surface of protective seam can not take place is concavo-convex; even again, also can see distinct reflected image after the reflection, outward appearance also is improved.In addition, if according to manufacture method of the present invention, can provide transmissivity more than 35%, degree of polarization is at the polaroid more than 90%.
Claims (11)
1. the manufacture method of a polaroid, it is to paste protective seam and make the method for polaroid at polariscopic one or both sides, wherein, the polariscopic regain when pasting with protective seam is 15%～30%.
2. according to the manufacture method of the polaroid of claim 1 record, wherein, the surfaceness of the direction vertical with the outrigger shaft direction of polaroid is calculated below 0.04 μ m according to center line average roughness.
3. according to the manufacture method of the polaroid of claim 1 record, wherein, polariscope and protective seam are pasted together through adhesive linkage.
4. according to the manufacture method of the polaroid of claim 1 record, wherein, the hydrophilic macromolecule film is dyeed, carry out crosslinked with the crosslinked bath that comprises crosslinking chemical with comprising dye bath with dichromatic iodine or dichroic dye, extend simultaneously, make polariscope thus.
5. according to the manufacture method of the polaroid of claim 4 record, wherein, the hydrophilic macromolecule film is a polyvinyl alcohol film.
6. according to the manufacture method of the polaroid of claim 1 record, wherein, further lamination reflecting plate and form reflection type polarizer.
7. according to the manufacture method of the polaroid of claim 1 record, wherein, further lamination semi-penetration plate and form semi-penetration type polaroid.
8. according to the manufacture method of the polaroid of claim 1 record, wherein, further lamination polarizer or λ plate and form ellipse or circular polarizing disk.
9. according to the manufacture method of the polaroid of claim 1 record, wherein, further lamination viewing angle compensation film and form polaroid.
10. according to the manufacture method of the polaroid of claim l record, wherein, further come the lamination briliancy to promote film and form polaroid by cement or bonding agent.
11. a liquid crystal indicator wherein, has polaroid at least one side of liquid crystal cells, this polaroid is to be to form on 15%～30% the polariscopic one or both sides by protective seam being sticked on regain when pasting with protective seam.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01130362XA CN1302298C (en) | 2001-10-16 | 2001-10-16 | Method for mfg. polaroid and liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01130362XA CN1302298C (en) | 2001-10-16 | 2001-10-16 | Method for mfg. polaroid and liquid crystal display device |
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| CN1412579A CN1412579A (en) | 2003-04-23 |
| CN1302298C true CN1302298C (en) | 2007-02-28 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100882169B1 (en) * | 2003-09-30 | 2009-02-06 | 닛토덴코 가부시키가이샤 | Process for manufacturing polarizing plate, polarizing plate, optical film and image display |
| WO2005093472A1 (en) * | 2004-03-25 | 2005-10-06 | Nitto Denko Corporation | Production method for polarization plate, polarization plate and image display unit using it |
| EP3203307A1 (en) * | 2011-11-28 | 2017-08-09 | 3M Innovative Properties Company | Polarizing beam splitters providing high resolution images and systems utilizing such beam splitters |
| TWI595273B (en) * | 2011-11-28 | 2017-08-11 | ３Ｍ新設資產公司 | Method of making polarizing beam splitters providing high resolution images and systems utilizing such beam splitters |
| JP6812933B2 (en) | 2017-09-19 | 2021-01-13 | トヨタ自動車株式会社 | Manufacturing method of interior members and manufacturing method of polarizing members |
| CN112248611B (en) * | 2020-10-12 | 2022-10-04 | 深圳市盛波光电科技有限公司 | Preparation method of polaroid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4564545A (en) * | 1983-03-01 | 1986-01-14 | Sumitomo Chemical Company, Limited | Light-polarizing plate having excellent durability and production of the same |
| JP2000249832A (en) * | 1999-03-01 | 2000-09-14 | Nitto Denko Corp | Polarizing film, polarizing plate and optical member |
| JP2000347181A (en) * | 1999-06-09 | 2000-12-15 | Nitto Denko Corp | Optical member and liquid crystal display device |
-
2001
- 2001-10-16 CN CNB01130362XA patent/CN1302298C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4564545A (en) * | 1983-03-01 | 1986-01-14 | Sumitomo Chemical Company, Limited | Light-polarizing plate having excellent durability and production of the same |
| JP2000249832A (en) * | 1999-03-01 | 2000-09-14 | Nitto Denko Corp | Polarizing film, polarizing plate and optical member |
| JP2000347181A (en) * | 1999-06-09 | 2000-12-15 | Nitto Denko Corp | Optical member and liquid crystal display device |
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| CN1412579A (en) | 2003-04-23 |
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