CN101329464A - Composite polaroid, liquid crystal display, manufacturing method for the composite polaroid and manufacturing method for optical compensation film - Google Patents
Composite polaroid, liquid crystal display, manufacturing method for the composite polaroid and manufacturing method for optical compensation film Download PDFInfo
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- CN101329464A CN101329464A CNA2007101118602A CN200710111860A CN101329464A CN 101329464 A CN101329464 A CN 101329464A CN A2007101118602 A CNA2007101118602 A CN A2007101118602A CN 200710111860 A CN200710111860 A CN 200710111860A CN 101329464 A CN101329464 A CN 101329464A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133634—Birefringent elements, e.g. for optical compensation the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- Optics & Photonics (AREA)
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Polarising Elements (AREA)
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Abstract
To provide an optical compensation film, having an alignment layer formed on a transparent substrate and having a liquid crystal compound coating layer thereon, or a composite polarizing plate comprising the film with the transparent support side laminated on a polarizer, wherein the waterproofing properties of the film or the plate is improved, by preventing interlayer peeling or fracture in a layer under heat and moisture conditions, even if the optical compensation film contains a layer having low waterproofing properties. The composite polarizing plate comprises an optical compensation film 2, having an alignment layer 4 formed on a transparent support 3 made of cellulose resin and further, having a liquid crystal compound coating layer 5 thereon, with the transparent support 3 side of the film being laminated on one surface of a polarizer 1. The optical compensation film 2 is subjected to UV irradiation, in such a manner that when the film 2 cut into a 2 cm*5 cm rectangle is curled into a cylinder having a 5 cm circumference and 2 cm height with the liquid crystal coating layer inside and immersed in hot water at 60 DEG C for 60 minutes, the density of air bubbles generating from the film is lower than 100 pieces/cm<2>.
Description
Technical field
The present invention relates to composite polarizing plate that a kind of single face at polariscope is pasted with the optical compensation films of the clad with liquid-crystal compounds, use the liquid crystal indicator that this polaroid is arranged.The invention still further relates to a kind of manufacture method of composite polarizing plate of said structure and the manufacture method of use therein optical compensation films.At length, relate to a kind of technology of water tolerance of improving the composite polarizing plate of said structure and constituting the optical compensation films of this polaroid.
Background technology
Information such as the watch-dog that low-power consumption in recent years,, low-work voltage, lightweight, slim LCD are used as mobile phone, portable data assistance, computing machine, TV are popularized rapidly with display device.Along with the development of liquid crystal technology, motion has the LCD of various patterns, is eliminating the variety of issue of the such LCD of so-called answer speed, contrast, narrow visual angle.
Twisted-nematic), STN (Super TwistedNematic: supertwist to row), VA (Vertical Alignment: homeotropic alignment), IPS (In-planeSwitching: various modes such as the transverse electric field) LCD has TN (Twisted Nematic:, in these modes, reasons such as shaft angle degree skew owing to having light leak that phase difference value forms, stravismus in the polaroid because of liquid crystal molecule, thereby have the direction (position angle) of the narrow viewing angle that becomes weakness respectively.As the method that enlarges such visual angle that becomes weakness, extensively adopt the method for utilizing the liquid crystal cell of phase retardation film, polaroid being carried out optical compensation and so on.Therefore, because the best kind of phase retardation film or optical compensation films changes because of the type of drive of the phase difference value of the liquid crystal in the liquid crystal cell, orientation, liquid crystal molecule etc., therefore, can use the phase retardation film or the optical compensation films of many types.
One of such phase retardation film or type of optical compensation films are liquid-crystal compounds to be coated to make it manifest optical characteristics on transparent support.Generally, be on transparent support, liquid-crystal compounds to be applied to make, but, in most cases be on transparent support, to be pre-formed oriented film for its liquid-crystal compounds is arranged by certain specific direction.For example, what Japanese kokai publication hei 9-179125 communique (patent documentation 1) was put down in writing is, oriented film is set on transparent support, make the support of band oriented film, the optical anisotropic layer (optical compensating layer) that is made of the disc-shaped structure compound is set on its oriented film, makes the optical compensation sheet material.
The material of oriented film can consider that directional characteristic, screening characteristics, optical characteristics, permanance wait suitably and select, particularly consider from directional characteristic or screening characteristics aspect, mostly from the not too indefatigable material of relative water, in other words be to select the hydrophilic material.For example, in above-mentioned patent documentation 1, recommend polyvinyl alcohol (PVA) as oriented film.When oriented film does not have the material of patience to constitute with clad by relative water, comprising under the environment of large quantity of moisture, its permanance is insufficient, and for example, inferior at high temperature, super-humid conditions, LCD can take place bad sometimes.
Specifically, when the influence owing to water causes any layer to lose enough closing forces, because other layer of formation polaroid stretches because of the heat generation or because of humidity changes the external stress that formation such as stretching takes place, splitting or its layer takes place sometimes self damage.
In more detail; on the transparent support that constitutes by cellulosic resins such as tri acetyl celluloses, form hydrophilic oriented film; form the clad of liquid-crystal compounds more thereon; the optical compensation films that forms thus is bonded in the single face of polariscope; and the transparent protective film that constitutes by tri acetyl cellulose usually in the multiaspect of polariscope bonding; in the polaroid that forms thus; be exposed to hot and humid condition following time; because hydrophilic oriented film is subjected to the influence of moisture; end at polaroid; closing force between oriented film and each layer descends; therefore; can see that can take place with it is the phenomenon of the shape space, tunnel of starting point to the inner extension of polaroid in any interface generation projection of the clad of transparent support/oriented film/liquid-crystal compounds.Below, this phenomenon is called tunnel effect.Shown in Figure 5 is, and the enlarged photograph of surperficial end of the polaroid of tunnel effect has taken place.In the figure, the right side is the end of polaroid as can be known, and a plurality of tunnel effects 20 are grown thus.
[patent documentation 1] Japanese kokai publication hei 9-179125 communique
Summary of the invention
Therefore, problem of the present invention is, on the transparent support that constitutes by cellulosic resin, form oriented film, form the clad of liquid-crystal compounds more thereon, at the optical compensation films that forms thus or its transparent support side is pasted in the composite polarizing plate that polariscope forms, even comprise water tolerance low when layer at its optical compensation films, can prevent also that under wet heat condition splitting or layer from damaging, and improves their water tolerance.Result of study is found, by the low member of such water tolerance being carried out the ultraviolet ray irradiation, can obtain the good composite polarizing plate of permanance that water tolerance improves, aforesaid bad phenomenon can not take place, so finished the present invention.
That is, according to the present invention, a kind of composite polarizing plate is provided, its formation method is as follows: form oriented film on the transparent support that is made of cellulosic resin, form the clad of liquid-crystal compounds more thereon, the optical compensation films of Xing Chenging constitutes composite polarizing plate by the single face that its transparent support side sticks on polariscope thus, this optical compensation films is carried out the ultraviolet ray irradiation, so that it becomes the rectangle of 2cm * 5cm in severing, and be that to make girth be 5cm in the inboard with the clad of liquid-crystal compounds, when highly impregnated in 60 ℃ the warm water 60 minutes under the state for the cylinder of 2cm, the density of gassing is less than 100/cm
2
In above-mentioned composite polarizing plate, preferably: described optical compensation films is carried out the ultraviolet ray irradiation, be 5cm, highly be that the density of gassing is 60/cm when impregnated in 60 ℃ the warm water 60 minutes under the state of cylinder of 2cm so that it makes girth in the mode that with the rectangle of aforesaid 2cm * 5cm with the clad of liquid-crystal compounds is the inboard
2Below.
In this composite polarizing plate, can on the face of polariscope and the opposition side face that is pasted with optical compensation films, paste transparent protective film, make the state on the two sides of protection polariscope.At this moment transparent protective film preferably carries out surface treatment at the opposition side of polariscope.This transparent protective film can be made of cellulosic resins such as for example tri acetyl celluloses.
On the other hand, the oriented film in the optical compensation films is made of hydrophilic resin mostly, for example, can be made of polyvinyl alcohol resin.The clad that constitutes the liquid-crystal compounds of optical compensation films can be the optical compensating layer that contains discoid liquid crystal.This optical compensating layer is to have a birefringent layer of negativity by what the liquid-crystal compounds with disc-shaped structure unit constituted, it can be following formation: the relative transparent support face tilt of the disc face of this disc-shaped structure unit, and the disc face of this disc-shaped structure unit and transparent support face angulation change in the thickness direction of optical compensating layer.At this moment, the relative transparent support face of the disc face of this disc-shaped structure unit angulation preferably supports the increase of the distance on side to increase with the optical compensating layer distance transparent in the thickness direction of optical compensating layer.
Can be at the clad arranged outside pressure sensitive adhesives layer of the liquid-crystal compounds that constitutes optical compensation films, so that it is pasted to liquid crystal cell.
And, according to the present invention, also providing a kind of liquid crystal indicator, it has above-mentioned any composite polarizing plate and liquid crystal cell, and on the liquid crystal cell surface, above-mentioned composite polarizing plate is folded layer by layer by pressure sensitive adhesives in its optical compensation films side.
And, according to the present invention, the manufacture method of the improved composite polarizing plate of a kind of water tolerance as mentioned above is provided, this method is as follows: form oriented film on the transparent support that is made of cellulosic resin, form the clad of liquid-crystal compounds more thereon, the optical compensation films that forms is thus sticked on the polariscope by its transparent support side, thereby manufacturing composite polarizing plate, for above-mentioned optical compensation films, use severing to become the rectangle of 2cm * 5cm, clad with liquid-crystal compounds is the inboard, being trimmed to girth is 5cm, it highly is the cylinder of 2cm, when impregnated in 60 ℃ the warm water 60 minutes under this state, the density of gassing is 100/cm
2Above starting material carry out ultraviolet ray irradiation to starting material or to the composite polarizing plate that above-mentioned optical compensation films is pasted on behind the polariscope, and the density of gassing is less than 100/cm when making its relative its optical compensation films impregnated in the warm water under similarity condition
2
And, according to the present invention, a kind of manufacture method that is used for the improved optical compensation films of water tolerance of above-mentioned composite polarizing plate also is provided, this method is as follows: form oriented film on the transparent support that is made of cellulosic resin, form the clad of liquid-crystal compounds more thereon, for the optical compensation films that forms thus, become the rectangle of 2cm * 5cm with respect to severing, with the clad of liquid-crystal compounds is that to make girth be 5cm in the inboard, it highly is the cylinder of 2cm, when impregnated in 60 ℃ the warm water 60 minutes under this state, the density of gassing is 100/cm
2Above starting material carry out ultraviolet ray and shine, so that the density of its gassing when impregnated in the warm water under similarity condition is less than 100/cm
2In the method, Yi Bian preferably heat the starting material of optical compensation films, Yi Bian carry out the ultraviolet ray irradiation.
For composite polarizing plate of the present invention, even when the optical compensation films that constitutes it comprises hydrophilic layer, for example water wettability oriented film, also can suppress the influence of moisture to it, for example, this composite polarizing plate is being positioned over hot and humid environment following time, the splitting or the layer that can prevent its optical compensation films damage the generation of the tunnel effect that can also suppress to accompany with it.And, for disposing the liquid crystal indicator of this composite polarizing plate,, also can guarantee stable display quality even be exposed under high temperature, the super-humid conditions.
In addition, according to the manufacture method of composite polarizing plate of the present invention and the manufacture method of optical compensation films, can make the improved composite polarizing plate of water tolerance as mentioned above reliably or be used for the improved optical compensation films of water tolerance of composite polarizing plate.
Description of drawings
Fig. 1 is the profile schema diagram of the configuration example of expression composite polarizing plate of the present invention.
Fig. 2 be expression with optical compensation films carry out warm water when test the rectangle sample planimetric map (A) and for its rectangle sample being impregnated in the warm water and the stereographic map of the state that makes (B).
Fig. 3 is the photo of the surface state of expression when the optical compensation films of ultraviolet pre-irradiation is carried out the warm water test.
Fig. 4 is the surface state of optical compensation films that almost can't see bubble is tested in expression by warm water a photo.
Fig. 5 is the reference photo of being photographed in the end, polaroid surface that tunnel effect has taken place.
Embodiment
Below, with reference to suitable accompanying drawing, the specific embodiment of the present invention is described.Layer example that constitutes of composite polarizing plate of the present invention is shown in Fig. 1 with profile schema diagram.The basic layer of Fig. 1 (A) expression constitutes, constituting of this composite polarizing plate: on the transparent support 3 that constitutes by cellulosic resin, form oriented film 4, form the clad 5 of liquid-crystal compounds more thereon, optical compensation films 2 its transparent support 3 sides of Xing Chenging are pasted on the single face of polariscope 1 thus.On polariscope 1 and the face face opposition side that is pasted with optical compensation films 2, preferably paste transparent protective film 7.In addition, shown in Fig. 1 (B), this transparent protective film 7 preferably in its outside, be that the opposition side of polariscope 1 has surface-treated layer 8.For Fig. 1 (B), identical with Fig. 1 (A) except the outside at transparent protective film 7 is provided with surface-treated layer 8, give identical symbol with (A) same part, to omit repeat specification.In the outside of optical compensation films 2, be the surface of the clad 5 of liquid-crystal compounds, can be provided for the pressure sensitive adhesives layer of pasting to liquid crystal cell 9.
At first, with reference to Fig. 1, each layer described successively.
Polariscope 1 is a kind of optical element, and it sees through the rectilinearly polarized light of the vibration plane with prescribed direction, absorbs the rectilinearly polarized light of the vibration plane with vertical with it direction.Specifically can be set forth in the directed film that forms of dichromatism pigment absorption on the polyvinyl alcohol resin film.Comprise that as the directed iodine polarizing mirror of the iodine of dichromatism pigment absorption, as the directed dyestuff of dichromatism organic dyestuff absorption of dichromatism pigment be polariscope, can use.
The transparent support 3 that constitutes optical compensation films 2 is made of cellulosic resin.Cellulosic resin specifically can be enumerated cellulosic resins such as diacetyl cellulose and tri acetyl cellulose, wherein, uses the triacetyl fiber usually.
The oriented film 4 that forms on transparent support 3 is made of hydrophilic resin mostly, particularly is made of polyvinyl alcohol resin usually.Polyvinyl alcohol resin can be to have introduced for example modified polyvinylalcohol of alkyl etc.
Generally speaking, on transparent support 3, form the clad that constitutes by such hydrophilic resin, friction treatment is carried out on its surface, make oriented film 4 thus.
With regard to the clad 5 of liquid-crystal compounds, the material that forms of nematic liquid crystal oblique arrangement (" the NH film " sold by Shin Nihon Oil Co., Ltd etc.) for example, but be generally the optical compensating layer that the coating liquid that will comprise discoid liquid crystal applies, makes its orientation to form.
Preferred this optical compensating layer is to have a birefringent layer of negativity by what the liquid-crystal compounds with disc-shaped structure unit constituted, the relative transparent support face tilt of the disc face of its disc-shaped structure unit, and the disc face of its disc-shaped structure unit and transparent support face angulation change in the thickness direction of optical compensating layer.In this mode, the relative transparent support face of the disc face of disc-shaped structure unit angulation is right, and what the so-called mixing arrangement of supporting the increase of the distance on side to increase with the optical compensating layer distance transparent in the thickness direction of optical compensating layer formed also is effective.The relative transparent support face of the disc face of disc-shaped structure unit angulation can for example begin to increase successively from the transparent support side in the scope about 5～50 degree.On transparent support, be formed with the concrete example of optical compensation films of the clad of oriented film and discoid liquid crystal, can enumerate " ヮ ィ De PVC ュ one " film (also being expressed as " WV film " sometimes) of selling by Fuji's photographic film (strain) etc.
The transparent protective film 7 that is pasted on the another side of polariscope 1 can use the transparent resin film arbitrarily that uses up to now.Can use for example film of polyolefin, polymethylmethacrylate, polycarbonate, polyethylene terephthalate, cyclic olefin resinoid (norbornene resin) etc.; The film that also has the cellulosic resin of representatives such as tri acetyl cellulose and diacetyl cellulose.Wherein, can preferably use the film of cellulosic resin, especially tri acetyl cellulose.
Being formed at the surface-treated layer 8 on the surface of transparent protective film 7, is a side (visual side) that becomes display surface when polaroid is applied to liquid crystal indicator, the layer that is provided with in order to improve its rerum natura.
Specifically can enumerate: the hard conating that is provided with in order to improve its surperficial mar resistance etc., in order to prevent that outer light from mirroring or to dazzle and the antiglare layer of setting, the anti-reflecting layer that is provided with in order to prevent external light reflection, the antistatic layer that is provided with in order to prevent static etc.
Hard conating can utilize following method to be provided with: coating ultraviolet hardening hard conating resin makes the method for its curing etc. to its irradiation ultraviolet radiation.Antiglare layer can utilize following method to be provided with: for example, Packed ultraviolet hardening hard conating resin is added in coating, to its irradiation ultraviolet radiation it is solidified, and makes it manifest concavo-convex method based on filler; Irradiation ultraviolet radiation under the state that makes ultraviolet curing resin contact embossment model makes its curing manifest concavo-convex method etc.Anti-reflecting layer can utilize following method to be provided with: metal oxide etc. is carried out method of one or more layers evaporation etc.In addition, antistatic layer can utilize following method to be provided with: coating has added the ultraviolet curing resin of antistatic agent, its irradiation ultraviolet radiation is made the method for its curing etc.
In the outside of optical compensation films 2, be the surface of the clad 5 of liquid-crystal compounds, can be provided for the pressure sensitive adhesives layer of pasting to liquid crystal cell 9.This pressure sensitive adhesives layer 9 can be made of the known adhesion resin of pressure sensitive adhesives that conducts such as acrylic compounds are called as cementing agent.
In the composite polarizing plate that constitutes as mentioned above, as illustrating in front background technology one hurdle, be exposed to hot and humid condition following time, because oriented film, particularly hydrophilic oriented film are subjected to the influence of moisture, closing force between oriented film and each layer descends, therefore, at any interface of the clad of transparent support/oriented film/liquid-crystal compounds projection takes place sometimes, can take place with its be the shape space, tunnel of starting point to the inner phenomenon of extending of polaroid, be tunnel effect.And; investigation according to the present inventor; when use has the optical compensation films " WV-SA " of Fuji's photographic film (strain) system with following structure; significant aforesaid tunnel effect can take place; constituting of this optical compensation films: on the transparent support that constitutes by cellulosic resins such as tri acetyl celluloses; the oriented film that formation is made of polyvinyl alcohol resin; form the clad of discoid liquid crystal more thereon; the relative transparent support face tilt of the disc face of its discoid liquid crystal, and its disc face and transparent support face angulation support the increase of the distance on side to increase with distance transparent in the thickness direction of discoid liquid crystal clad.
It has been generally acknowledged that the generation of such tunnel effect results from water wettability as the polyvinyl alcohol resin of oriented film, its water tolerance is insufficient to be one of its reason.And find that method as described below can quantitatively distinguish the water tolerance of the member that such water tolerance is low effectively.
That is, shown in Fig. 2 (A) planimetric map, aimed thin film (optical compensation films) severing is become the rectangle of 2cm * 5cm.Then, be that the mode of inboard is repaired with this rectangle with the clad of liquid-crystal compounds, make girth and be 5cm, highly be the cylinder of 2cm.This state that trims is shown in Fig. 2 (B) stereographic map.Fix by adhesive tape 12 with the sample end of the state that trims butt joint when two ends butt joints (wide 2cm) 10.Under this state, impregnated in 60 ℃ the warm water 60 minutes.
At this moment, a large amount of bubbles take place in the sample of poor water resistance.The reason that such bubble takes place is, because because of the influence of water causes the closing force between tri acetyl cellulose/oriented film/liquid crystal clad to descend, therefore, projection takes place interlayer.Thereby so long as the high optical compensation films of water tolerance, such bubble just not too takes place.
For the optical compensation films of a large amount of bubbles, poor water resistance takes place in aforesaid warm water immersion test, when utilize thereafter common technology make its be pasted on polariscope, when making composite polarizing plate, under hot and humid condition, possibility concavo-convex because of splitting generation tunnel-like and that peel off is very big.
In order to improve the phenomenon that a large amount of bubbles take place in the warm water immersion test, improve the water tolerance of optical compensation films, find that it is effective that this optical compensation films is carried out the ultraviolet ray irradiation.Therefore, in the present invention, on the transparent support 3 that constitutes by cellulosic resin, form oriented film 4, form the clad 5 of liquid-crystal compounds more thereon, the inadequate optical compensation films 2 of optical compensation films 2, particularly water tolerance that forms is thus carried out the ultraviolet ray irradiation, improve the water tolerance of this optical compensation films 2 thus.
Photo during shown in Figure 3 the is magnifier that multiplying power is about 10 times covers in optical compensation films that fluorescent light observes, and a large amount of bubbles take place in the aforesaid warm water immersion test surperficial.In addition, shown in Figure 4 is that the magnifier that multiplying power is about 10 times covers in the photo of fluorescent light when observing the optical compensation films that almost do not have gassing in the warm water immersion test surperficial.Because optical compensation films self is transparent, therefore, no matter see from which side and can observe bubble, the photo of Fig. 3 and Fig. 4 is the photo when the transparent support side is seen.
And, in aforesaid 60 ℃ warm water, flooded 60 minutes after, from warm water, take out, during viewing optics compensate film surperficial, to 100/cm
2The optical compensation films of above density gassing is pasted on polariscope when making composite polarizing plate with it, under hot and humid condition, the tunnel effect that caused by the splitting of optical compensation films takes place easily, as long as bubble density is less than 100/cm
2, just be difficult to take place such tunnel effect.Therefore, in warm water immersion test as implied above, with 100/cm
2During above density gassing, distinguish that its water tolerance is low, in same warm water immersion test, only with less than 100/cm
2The density gassing time, distinguish its water tolerance height.The high benchmark of the water tolerance more preferably density of gassing is 60/cm
2Below.
Being used to improve time of ultraviolet ray irradiation of the water tolerance of optical compensation films, can be to stick on before the polariscope,, carries out ultraviolet ray irradiation for optical compensation films self that is, also can be to make to carry out ultraviolet ray after the composite polarizing plate and shine.The ultraviolet ray irradiation is preferably carried out from the liquid crystal clad side of optical compensation films.Thereby, when making the laggard row ultraviolet ray of composite polarizing slice, thin piece irradiation, also preferably shine from the liquid crystal clad side of optical compensation films.In this said ultraviolet ray irradiation, be meant that irradiation has the luminous ultraviolet ray in wavelength 200～400nm scope at least, as be employed light source, can enumerate high temperature mercury vapor lamp, synthetic lamp etc.In addition, the ultraviolet ray irradiation under the room temperature by increasing the accumulative total light quantity to a certain extent, also can obtain effect of sufficient.But, the ultraviolet ray irradiation under the heating, its better effects if even the accumulative total light quantity is less, also can obtain effect of sufficient.When handling with roller, if consider turnout etc., the processing time, one side of weak point was more favourable, and preferred under 40～150 ℃ environment, carried out the ultraviolet ray irradiation with low accumulative total light quantity.In addition,, unfavorable conditions such as painted or decomposition might occur, therefore, consider, also preferably under heating, carry out the method for ultraviolet ray irradiation from the angle that reduces the accumulative total light quantity as far as possible if excessively carry out the ultraviolet ray irradiation.
Accumulative total light quantity in the ultraviolet ray irradiation can be considered the temperature of the heating carried out as required or the level of the water tolerance that obtains etc., from 10～1500mJ/cm
2About scope in suitably determine.
Improve the reason of water tolerance by ultraviolet ray irradiation, also not definite fully, but for example think because oriented film closes the degree of crosslinking of clad improves, become for shipwreck with the cause of dissolving etc.
In aforesaid the present invention, again describe with reference to Fig. 1, on the transparent support 3 that constitutes by cellulosic resin, form oriented film 4, form the clad 5 of liquid-crystal compounds more thereon, the optical compensation films 2 of Xing Chenging constitutes composite polarizing plate by the single face that its transparent support 3 sides are pasted on polariscope thus, for the composite polarizing plate that forms thus, these optical compensation films 2 following formations, it is carried out the ultraviolet ray irradiation, make it become the rectangle of 2cm * 5cm in severing, and be that to make girth be 5cm in the inboard with the clad of liquid-crystal compounds, when highly impregnated in 60 ℃ the warm water 60 minutes under the state (with reference to Fig. 2) for the cylinder of 2cm, the density of the bubble of generation is less than 100/cm
2
Making the combination of composite polarizing plate shown in Figure 1 and liquid crystal cell make liquid crystal indicator is that a side at optical compensation films 2 is pasted on liquid crystal cell by pressure sensitive adhesives layer 9.
In addition, composite polarizing plate made according to the method for the present invention, this method is as follows: 3 form oriented film 4 on the transparent support that is made of cellulosic resin, form the clad 5 of liquid-crystal compounds more thereon, the optical compensation films 2 that forms is thus sticked on the polariscope 1 by its transparent support side, make composite polarizing plate thus, for its optical compensation films 2, use severing to become the rectangle of 2cm * 5cm, clad 5 with liquid-crystal compounds is the inboard, making girth is 5cm, highly be the cylinder of 2cm, when impregnated in 60 ℃ the warm water 60 minutes under this state (with reference to Fig. 2), the bubble density of generation is 100/cm
2Above starting material carry out ultraviolet ray irradiation to starting material or to the composite polarizing plate that its optical compensation films is pasted on behind the polariscope, make the density of the bubble of generation when this optical compensation films impregnated in the warm water under similarity condition relatively less than 100/cm
2By carrying out such ultraviolet ray irradiation, can improve the water tolerance of composite polarizing plate, particularly be exposed to the hot and humid condition patience in following time.
In addition, optical compensation films made according to the method for the present invention, this method is as follows: form oriented film 4 on the transparent support 3 that is made of cellulosic resin, form the clad 5 of liquid-crystal compounds more thereon, for the optical compensation films 2 that forms thus, severing becomes the rectangle of 2cm * 5cm, with the clad of liquid-crystal compounds is that the inboard makes girth and is 5cm, highly is the cylinder of 2cm, when impregnated in 60 ℃ the warm water 60 minutes under this state (with reference to Fig. 2), the bubble density of generation is 100/cm
2Above starting material, the ultraviolet ray irradiation is so that the density of its bubble that takes place when impregnated in the warm water under similarity condition is less than 100/cm
2By carrying out such ultraviolet ray irradiation, can improve the water tolerance of optical compensation films.
This ultraviolet ray irradiation is preferably carried out simultaneously heating the raw-material of above-mentioned optical compensation films.The heating of this moment is preferably carried out in the temperature more than 40 ℃, below 150 ℃.Be more preferably the temperature that adopts more than 60 ℃, below 120 ℃.
Embodiment
Below, illustrative embodiments further specifically describes the present invention, but the present invention is not limited to these examples.
Embodiment 1
" WV-SA " (trade name) that is obtained by Fuji's photographic film (strain) is the following optical compensation films that forms: form the oriented film that is made of polyvinyl alcohol resin at the single face by the tri acetyl cellulose film, coat discoid liquid crystal more thereon.Downcutting the rectangle of 2cm * 5cm from this film, is that the inboard makes form as shown in Figure 2 with its liquid crystal clad, when impregnated in 60 ℃ the warm water 60 minutes under this state, with about 230/cm
2The density gassing, confirm its poor water resistance.As starting material, in its liquid crystal clad side, the ultraviolet lamp " UV9056 " that uses Japanese battery (strain) to make at room temperature carries out the ultraviolet ray irradiation with it.The light source of irradiation uses mercury vapor lamp, and the accumulative total light quantity is 900mJ/cm
2Estimate its water tolerance with above-mentioned same method again after the ultraviolet ray irradiation, the generation number of bubble is reduced to 20/cm
2, confirm that its water tolerance is improved.
In addition, prepare the polariscope that constitutes by iodine staining polyvinyl alcohol (PVA) oriented film.Single face at this polariscope; the band optical compensation function film that will carry out above-mentioned ultraviolet treatment with irradiation bonds by cementing agent by its tri acetyl cellulose film side; another side at polariscope; the following 4 kinds of tri acetyl cellulose films that single face had surface-treated layer bond by cementing agent in tri acetyl cellulose film side (side of surface-treated layer is not set) respectively, make composite polarizing plate.
(1) single face be provided with antiglare layer tri acetyl cellulose film (trade name: " DTAC AGUV80H-3 ", Dai Nippon Printing's (strain) system),
(2) single face be provided with antiglare layer other tri acetyl cellulose film (trade name: " DTAC AG5UV80H-13 ", Dai Nippon Printing's (strain) system),
(3) single face be provided with the tri acetyl cellulose film (trade name: " HT-ARPSMC ", letterpress (strain) system) that utilizes the anti-reflection layer that evaporation forms,
(4) single face is provided with the tri acetyl cellulose film (trade name: " 80CHC ", letterpress (strain) system) of transparent hard conating.
And, in the liquid crystal clad side of the formation optical compensation films of this composite polarizing plate, the layer of acrylic compounds pressure sensitive adhesives (リ Application テ ッ Network (strain) system " P236JP ") is set, make the composite polarizing plate of being with the pressure sensitive adhesives layer.After the composite polarizing plate of this band pressure sensitive adhesives layer is 45 ° angle severing and becomes the diagonal angle and be about 8 inches (200mm) sizes with the long relatively limit rotation of absorption axes direction half-turn, stick on the thick glass plate of 1.1mm, under 50 ℃ of temperature, 5 atmospheric conditions of pressure, carry out pressurized treatments and placed 24 hours after 20 minutes.Put into the hot and humid calibration cell of 65 ℃ of temperature, relative humidity 90% then; after 65 hours, sample is taken out; observe its outward appearance, have in use under any situation of 4 kinds of tri acetyl cellulose films being provided with surface-treated layer, all do not have to peel off or bad phenomenon such as projection.
Embodiment 2
For with the starting material of the identical optical compensation films " WV-SA " that in embodiment 1, uses, in heating, carry out ultraviolet ray and shine.That is, this film is installed on the heating plate that is adjusted into 90 ℃, use with embodiment 1 in the identical ultraviolet lamp and the light source that use, with light quantity 50mJ/cm totally
2, carry out the ultraviolet ray irradiation from liquid crystal clad side.After the ultraviolet ray irradiation, estimate water tolerance according to the method identical with embodiment 1, its result, the generation of the bubble of warm water test does not occur fully, confirms to have improved water tolerance.
Use the optical compensation films after this ultraviolet ray treatment with irradiation,, carry out high temperature and humidity test with same method with the embodiment 1 the same composite polarizing plate of making the band pressure sensitive adhesive layer.Its result does not occur peeling off or bad phenomenon such as projection.
Comparative example 1
Directly use the starting material of the film " WV-SA " of the band optical compensation function identical with the film of embodiment 1 use, do not carry out ultraviolet treatment with irradiation, all the other and embodiment 1 operate equally, make the composite polarizing plate of band pressure sensitive adhesives layer, use with quadrat method and carry out high temperature and humidity test.Projection takes place at optical compensation films " WV-SA " interlayer in its result, and tunnel effect has as shown in Figure 5 taken place.
Reference example
Use with use in embodiment 2 raw-material batch different, the generation density of the bubble in the warm water immersion is about 300/cm
2" WV-SA " starting material, mainly according to embodiment 2, but the design temperature that changes the heating plate be used to heat optical compensation films closes the accumulative total light quantity of ultraviolet ray irradiation, the bubble number of observing after the warm water immersion test is (individual/cm
2), the results are shown in table 1.
Table 1
Bubble number after the warm water immersion test when changing heating-up temperature and accumulative total light quantity is (individual/cm
2)
Claims (13)
1. composite polarizing plate, on the transparent support that constitutes by cellulosic resin, form oriented film, form the clad of liquid-crystal compounds more thereon, the optical compensation films of Xing Chenging constitutes composite polarizing plate by the single face that its transparent support side sticks on polariscope thus, it is characterized in that, this optical compensation films is carried out the ultraviolet ray irradiation, so that it becomes the rectangle of 2cm * 5cm in severing, and be that to make girth be 5cm in the inboard with the clad of liquid-crystal compounds, when highly impregnated in 60 ℃ the warm water 60 minutes under the state for the cylinder of 2cm, the density of gassing is less than 100/cm
2
2. composite polarizing plate as claimed in claim 1, wherein, this optical compensation films is carried out ultraviolet ray irradiation, so that it becomes the rectangle of 2cm * 5cm and be that the inboard makes girth and is 5cm, highly is that the density of gassing is 60/cm when impregnated in 60 ℃ the warm water 60 minutes under the state of cylinder of 2cm with the clad of liquid-crystal compounds in severing
2Below.
3. composite polarizing plate as claimed in claim 1 or 2 wherein, on the face of the opposition side of the face that is pasted with optical compensation films of polariscope, is pasted with transparent protective film.
4. composite polarizing plate as claimed in claim 3, wherein, transparent protective film carries out surface treatment at the opposition side of polariscope.
5. as each described composite polarizing plate in the claim 1～4, wherein, the oriented film that constitutes optical compensation films is made of polyvinyl alcohol resin.
6. as each described composite polarizing plate in the claim 1～5, wherein, the clad that constitutes the liquid-crystal compounds of optical compensation films is the optical compensating layer that contains discoid liquid crystal.
7. composite polarizing plate as claimed in claim 6, wherein, this optical compensating layer is to have a birefringent layer of negativity by what the liquid-crystal compounds with disc-shaped structure unit constituted, the relative transparent support face tilt of the disc face of this disc-shaped structure unit, and the disc face of this disc-shaped structure unit and transparent support face angulation change in the thickness direction of optical compensating layer.
8. composite polarizing plate as claimed in claim 7, wherein, the relative transparent support face of the disc face of this disc-shaped structure unit angulation supports the increase of the distance on side to increase with the optical compensating layer distance transparent in the thickness direction of optical compensating layer.
9. as each described composite polarizing plate in the claim 1～8, wherein, be provided with the pressure sensitive adhesives layer in the clad outside of the liquid-crystal compounds that constitutes optical compensation films.
10. a liquid crystal indicator is characterized in that, it has each described composite polarizing plate in liquid crystal cell and the claim 1～8, and on this liquid crystal cell surface, this composite polarizing plate is pasted by the pressure sensitive adhesives layer in its optical compensation films side and formed.
11. the manufacture method of the improved composite polarizing plate of water tolerance, its method is as follows: form oriented film on the transparent support that is made of cellulosic resin, form the clad of liquid-crystal compounds more thereon, the optical compensation films that forms is thus sticked on the polariscope by its transparent support side, thereby manufacturing composite polarizing plate, it is characterized in that, for this optical compensation films, use becomes the rectangle of 2cm * 5cm in severing, and be that to make girth be 5cm in the inboard with the clad of liquid-crystal compounds, when highly impregnated in 60 ℃ the warm water 60 minutes under the state for the cylinder of 2cm, the bubble density of generation is 100/cm
2Above starting material carry out ultraviolet ray irradiation to starting material or to the composite polarizing plate that this optical compensation films is pasted on behind the polariscope, so that the density of its bubble of generation when its optical compensation films impregnated in the warm water under similarity condition relatively is less than 100/cm
2
12. the manufacture method of the improved optical compensation films of water tolerance, it is characterized in that, on the transparent support that constitutes by cellulosic resin, form oriented film, form the clad of liquid-crystal compounds more thereon, for the optical compensation films that forms thus, for the rectangle that becomes 2cm * 5cm in severing and with the clad of liquid-crystal compounds is that the inboard makes girth and is 5cm, highly is that the bubble density of generation is 100/cm when impregnated in 60 ℃ the warm water 60 minutes under the state of cylinder of 2cm
2Above starting material carry out ultraviolet ray irradiation, so that the density of its bubble of generation when impregnated in the warm water under similarity condition is less than 100/cm
2
13. method as claimed in claim 12 wherein, is carried out the ultraviolet ray irradiation in heating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006174922A JP2008003451A (en) | 2006-06-26 | 2006-06-26 | Composite polarizing plate, liquid crystal display using the same, method for manufacturing composite polarizing plate, and method for manufacturing optical compensation film used for the plate |
| JP2006174922 | 2006-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101329464A true CN101329464A (en) | 2008-12-24 |
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ID=39007860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101118602A Pending CN101329464A (en) | 2006-06-26 | 2007-06-20 | Composite polaroid, liquid crystal display, manufacturing method for the composite polaroid and manufacturing method for optical compensation film |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2008003451A (en) |
| KR (1) | KR20070122381A (en) |
| CN (1) | CN101329464A (en) |
| TW (1) | TW200817794A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368127A (en) * | 2011-07-13 | 2012-03-07 | 惠州市睿立宝莱光电科技有限公司 | Liquid crystal light valve for converting signal light into bidirectional circularly polarized light stereoscopic imaging |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010052273A (en) * | 2008-08-28 | 2010-03-11 | Jsr Corp | Laminated film, method of manufacturing the same and polarizing plate and liquid crystal display element having the same |
| CN102866538B (en) * | 2012-09-24 | 2015-11-25 | 京东方科技集团股份有限公司 | Optical compensation films and preparation method thereof, display device |
| CN106125365A (en) * | 2016-08-24 | 2016-11-16 | 中航华东光电有限公司 | A kind of reinforced liquid crystal display screen component binding structure and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3148513B2 (en) * | 1994-04-27 | 2001-03-19 | 日本合成化学工業株式会社 | Manufacturing method of polarizing plate |
| JP2005062799A (en) * | 2003-07-25 | 2005-03-10 | Fuji Photo Film Co Ltd | Optical compensation sheet, polarizing plate, and liquid crystal display using the plate |
-
2006
- 2006-06-26 JP JP2006174922A patent/JP2008003451A/en active Pending
-
2007
- 2007-06-20 CN CNA2007101118602A patent/CN101329464A/en active Pending
- 2007-06-21 KR KR1020070061182A patent/KR20070122381A/en not_active Application Discontinuation
- 2007-06-22 TW TW096122612A patent/TW200817794A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368127A (en) * | 2011-07-13 | 2012-03-07 | 惠州市睿立宝莱光电科技有限公司 | Liquid crystal light valve for converting signal light into bidirectional circularly polarized light stereoscopic imaging |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200817794A (en) | 2008-04-16 |
| KR20070122381A (en) | 2007-12-31 |
| JP2008003451A (en) | 2008-01-10 |
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