CN107132688A - Polarization plates group and liquid crystal panel - Google Patents
Polarization plates group and liquid crystal panel Download PDFInfo
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- CN107132688A CN107132688A CN201710101420.2A CN201710101420A CN107132688A CN 107132688 A CN107132688 A CN 107132688A CN 201710101420 A CN201710101420 A CN 201710101420A CN 107132688 A CN107132688 A CN 107132688A
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- polarization plates
- liquid crystal
- polarizer
- thickness
- adhesive
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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
- G02B5/3016—Polarising elements involving passive liquid crystal elements
-
- 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
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- 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
-
- 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
- G02F1/0136—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 for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Present invention offer can suppress the polarization plates group of liquid crystal panel warpage in high temperature environments and the polarization plates group is fitted in the liquid crystal panel of liquid crystal cells.The present invention provides a kind of polarization plates group, it is the polarization plates group of the 1st polarization plates and the 2nd polarization plates of the rear side for being configured at the liquid crystal cells with the observation side for being configured at liquid crystal cells, wherein, 2nd polarization plates have reflection type polarizer, when the crimp force of the 1st polarization plates is set into C1, the crimp force of the 2nd polarization plates is set to C2, the difference C2 C1 of crimp force are 0.4~1.0gf.
Description
Technical field
The present invention relates to the polarization plates group that can suppress liquid crystal panel warpage in high temperature environments and use the polarization plates
The liquid crystal panel of group.
Background technology
In recent years, power consumption is low, work under low-voltage, lightweight and slim liquid crystal display are used as mobile phone, portable
The information such as information terminal, the monitor of computer, TV are promptly popularized with display device.With the hair of liquid crystal technology
The problem of exhibition, it is proposed that the liquid crystal display of various patterns, liquid crystal display of response speed, contrast, narrow viewing angle etc, is just
Gradually it is eliminated.In addition, with the popularization of movement liquid crystal display, also having thin and lightweight requirement for liquid crystal panel.
With the slimming of liquid crystal panel, there are problems that：Because fitting in the inclined of liquid crystal cells in high temperature environments
The contraction of vibration plate and make liquid crystal panel warpage, so as to can not be accommodated in the housing of final products.
In order to suppress the warpage of such a liquid crystal display panel, following methods are developed in the past：Liquid crystal is configured at by change
The observation side of unit and the thickness with the polarization plates of observation side opposite side (rear side) of liquid crystal cells, so as to suppress liquid crystal
Show the warpage of panel.For example following methods have been recorded in Japanese Unexamined Patent Publication 2012-58429 publications (patent document 1)：By making
The thickness configured in the polarizing coating (described polarizer in the present invention) of the polarization plates of the observation side of liquid crystal cells is thinner than configuration and existed
The polarizing coating of the rear side of liquid crystal cells, so as to suppress the warpage of liquid crystal display panel.
In addition, proposing following methods in Japanese Unexamined Patent Publication 2013-37115 publications (patent document 2)：By making observation
In the optical laminate of side contained polarizing coating (described polarizer in the present invention) than configuration with observation side opposite side
More than 5 μm of polarization thickness contained by optical laminate, so as to suppress the warpage of liquid crystal panel.But, although these methods can
Effect is played with the liquid crystal cells to thickness big (such as more than 0.5mm and then for more than 0.7mm), but to thin liquid crystal cells
Suppression warpage effect it is insufficient.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2012-58429 publications
Patent document 2：Japanese Unexamined Patent Publication 2013-37115 publications
The content of the invention
The invention problem to be solved
It is an object of the invention to provide the polarization plates group that can suppress liquid crystal panel warpage in high temperature environments and general
The polarization plates group fits in the liquid crystal panel of liquid crystal cells.
Means for solving the problems
[1] a kind of polarization plates group, it is that have the 1st polarization plates of the observation side for being configured at liquid crystal cells and be configured at above-mentioned
The polarization plates group of 2nd polarization plates of the rear side of liquid crystal cells, wherein
Above-mentioned 2nd polarization plates have reflection type polarizer,
When the crimp force of above-mentioned 1st polarization plates is set into C1, the crimp force of above-mentioned 2nd polarization plates is set to C2, crimp force
Difference C2-C1 be 0.4~1.0gf.
[2] the polarization plates group according to [1], wherein, above-mentioned 1st polarization plates and above-mentioned 2nd polarization plates are respectively provided with and included
The polarizer of polyvinyl alcohol resin film, the thickness of above-mentioned polarizer is less than 20 μm.
[3] the polarization plates group according to [2], wherein, the thickness for the polarizer that above-mentioned 1st polarization plates have is 10 μm
More than, the thickness for the polarizer that above-mentioned 2nd polarization plates have is less than 10 μm.
[4] the polarization plates group according to [2] or [3], wherein, a surface layer of above-mentioned 2nd polarization plates in above-mentioned polarizer
It is laminated with diaphragm and is laminated with above-mentioned reflection type polarizer in another side.
[5] according to the polarization plates group described in [4], wherein, the moisture permeability of said protection film for 500g/ (m224hr) with
Under.
[6] a kind of liquid crystal panel, it possesses the polarization plates group and liquid crystal cells any one of [1]~[5], above-mentioned liquid
The thickness of brilliant unit is below 0.4mm.
Invention effect
According to the present invention it is possible to eliminate the warpage of liquid crystal panel in high temperature environments, it can obtain in high temperature environments
It is accommodated in the liquid crystal panel in the housing of final products.
Brief description of the drawings
The schematic cross sectional views for the example that Fig. 1 is constituted for the preferred layer of the polarization plates group of the expression present invention.
The schematic cross sectional views for the example that Fig. 2 is constituted for the preferred layer of the polarization plates group of the expression present invention.
Fig. 3 is the schematic diagram illustrated for the definition of the crimp force to the present invention.
Fig. 4 is the schematic diagram of one of the reflecting polarizer used in the present invention.
Fig. 5 is the schematic cross sectional views for the example for representing the liquid crystal panel of the present invention.
Embodiment
Hereinafter, it is appropriate using accompanying drawing is to the polarization plates group of the present invention and has used the liquid crystal panel of the polarization plates group to say
Bright, still, the present invention is not limited by these embodiments.
The polarization plates group of the present invention is by being configured at the 1st polarization plates 10 of the observation side of liquid crystal cells and being configured at liquid crystal cells
The 2nd polarization plates 11 of rear side constitute.The preferred layer structure of 1 pair of reference picture the 1st polarization plates 10 of the invention and the 2nd polarization plates 11
Into illustrating.In Fig. 1, the 1st polarization plates 10 are fitted with diaphragm 30a, 30b respectively in the two-sided of polarizer 20.In protection
The way that the face of the film 30a binding face opposite side with polarizer 20 forms surface-treated layer is also useful.2nd polarization plates 11 are excellent
Being selected at least one side of polarizer 21 has diaphragm, can also be protected as shown in Figure 1 in the two-sided stacking respectively of polarizer
Cuticula 31a, 31b and across adhesive linkage 40 be laminated reflection type polarizer 50.It is also preferable to：As shown in Figure 2 in polarization
One face stacked guard film 31a of piece 21, and another side not across diaphragm 31b and directly on polarizer 21 across bonding
Layer 40 is laminated reflection type polarizer 50.These polarization plates fit in liquid crystal cells by adhesive phase 32,33 respectively, form liquid crystal
Panel.
With regard to the present invention polarization plates group for, by the crimp force of the 1st polarization plates 10 be set to C1, the 2nd polarization plates curling
When power is set to C2, the difference C2-C1 of crimp force is 0.4~1.0gf, preferably 0.5~0.9gf.By with such a crimp force it
Difference, so as to suppress the warpage of the liquid crystal panel by liquid crystal panel when being stood 250 hours in the environment of 85 DEG C.Generally and
Speech, thus it is speculated that the warpage for the smaller then liquid crystal panel of difference of crimp force is smaller, but present inventors have surprisingly found that with above-mentioned model
The warpage of liquid crystal panel can be effectively reduced during the difference of the crimp force enclosed.
In order to obtain the difference of above-mentioned crimp force, the crimp force C1 of the 1st polarization plates is preferably 0.2~1.0gf, is more preferably
0.2~0.8gf, more preferably 0.25~0.5gf.In addition, the crimp force C2 of the 2nd polarization plates be preferably 0.6~2.0gf,
More preferably 0.6~1.8gf, more preferably 0.65~1.5gf.
In this manual, crimp force is defined in such a way.As shown in figure 3, first, polarization plates are cut into
The square of 100mm square.Now, each side of polarization plates 70 tilts 45 degree relative to the absorption direction of principal axis 72 of polarization plates 70.Connect
, enter the heat treatment that the polarization plates 70 for being about to cut out stand 5 minutes in the environment of 85 DEG C, crimp polarization plates 70.Will volume
Glass is fixed in double of side that the diagonal orthogonal with absorbing direction of principal axis 72 of polarization plates 70 after song rises using fixture 73
On plate.Generally, polarization plates are symmetrically crimped, therefore any side can be fixed.In this condition to loose inclined
The summit applying power 74 of vibration plate, the power that polarization plates 70 are in flat state is crimp force.Fixture can use adhesive tape etc..Volume
Qu Li is measured such as can be claimed using electronics day.
And then, it is preferred to use following configuration：The absorption axiss of 1st polarization plates and the short side direction of liquid crystal cells are almost parallel,
The absorption axiss of 2nd polarization plates and the long side direction of liquid crystal cells are almost parallel." almost parallel " is not limited on stricti jurise
It is parallel, such as angle formed by the absorption axiss of polarization plates and each side of liquid crystal cells is preferably less than 5 °, more preferably less than 3 °,
More preferably less than 1 °.
Find to make the warpage of liquid crystal panel diminish by the crimp force difference with appropriateness in the present invention, can speculate that it is former
Reason is the shape based on the liquid crystal panel used in smart mobile phone etc..In most cases, the 1st polarization plates so that its absorption axis with
The mode that the short side of liquid crystal cells is almost parallel is configured, and the 2nd polarization plates are so that the long side of its absorption axis and liquid crystal cells is big
Parallel mode is caused to be configured.Moreover, the crimp force C1 of the 1st polarization plates can be considered as the tiny area to the long side of liquid crystal cells
The power of application, the crimp force C2 of the 2nd polarization plates can be considered as the power of the tiny area application to liquid crystal cells short side.Such one
Come, crimp force C1 is integrated into obtained size in the long side direction of liquid crystal cells makes what panel was tilted as the 1st polarization plates
Power, crimp force C2 is integrated into obtained size in the short side direction of liquid crystal cells makes what panel was tilted as the 2nd polarization plates
Power.Think：1st polarization plates make the power and the 2nd polarization plates of liquid crystal cells tilting make the difference of the power of liquid crystal cells tilting smaller, more energy
Suppress warpage.Therefore it can speculate：In order to suppress the actual warpage of liquid crystal panel, compared with observation side polarization plates, rear side
Polarization plates have a case that more major coil power is advantageously.But, above-mentioned inference is not limited in any way to the present invention.
Hereinafter, to the present invention polarization plates group and the component of composition liquid crystal panel is described in detail.In addition, sometimes by
The polarizer 21 that the polarization plates 11 of polarizer 20 and the 2nd that 1 polarization plates 10 have have only is referred to as polarizer, will protect sometimes
Cuticula 30a, diaphragm 30b, diaphragm 31a and diaphragm 31b are only referred to as diaphragm.
[polarizer]
As polarizer 20,21, as long as meeting above-mentioned crimp force, then arbitrarily suitable polarizer can be used.Polarization
Piece generally goes through following process to manufacture：The process that uniaxial tension is carried out to polyvinyl alcohol resin film；By by polyvinyl alcohol
The process that resin film dichroism pigment dyes and makes it adsorb dichroism pigment；The polyethylene of dichroism pigment will be adsorbed with
The process that alcohol resin film is handled with boric acid aqueous solution and is crosslinked it；And in the crosslinking Treatment using boric acid aqueous solution
The process that laggard water-filling is washed.
Polyvinyl alcohol resin can be manufactured by the way that polyvinyl acetate system resin is carried out into saponification.Polyvinyl acetate
Be resin except can in addition to the homopolymer i.e. polyvinyl acetate for vinyl acetate, can also for vinyl acetate with can be same
The copolymer of the other monomers of its copolymerization.As can with vinyl acetate copolymerization other monomers, for example unsaturated carboxylic can be enumerated
Acids, olefines, vinyl ethers, unsaturated sulfonic acid class, acrylic amide with ammonium etc..
The saponification degree of polyvinyl alcohol resin is usually 85~100 moles of % or so, preferably 98 moles more than %.Poly- second
Enol system resin can be modified, for example, it is also possible to use through the modified polyvinyl formal of aldehydes, polyvinyl acetal
Deng.The degree of polymerization of polyvinyl alcohol resin is usually 1,000~10,000 or so, preferably 1,500~5,000 or so.
It can be used as the former material film of polarizer after such a polyvinyl alcohol resin is film-made.Polyvinyl alcohol resin is film-made
Method is not particularly limited, it is possible to use known method is film-made.The thickness of polyvinyl alcohol resin former material film is, for example, 10
~100 μm or so, preferably 10~50 μm or so.
Longitudinal uniaxial tension of polyvinyl alcohol resin film can using dichroism pigment dyeing before, dyeing it is same
When or dyeing after carry out.In the case of carrying out longitudinal uniaxial tension after dyeing, longitudinal uniaxial tension both can be in boron
Carry out, can also be carried out in boric acid processing before acid treatment.It is of course also possible to which shown multiple stages carry out longitudinal direction here
Uniaxial tension.Longitudinal uniaxial tension can use the method for uniaxial tension that carried out between the different roller of peripheral speed, use hot-rolling
Carry out method of uniaxial tension etc..In addition, longitudinal uniaxial tension can both be carried out using dry type stretching, wet type can also be utilized
Stretch to carry out, wherein, dry type stretching is stretched in an atmosphere, and wet tensile makes polyvinyl alcohol resin with water equal solvent
Stretched in the state of membrane swelling.Stretching ratio is usually 3~8 times or so.
The dyeing of the utilization dichroism pigment of polyvinyl alcohol resin film for example can be by containing dichroism pigment
The method of polyvinyl alcohol resin film is impregnated in the aqueous solution to carry out.As dichroism pigment, specifically, can use iodine or
Dichroic organic dye.It is explained, polyvinyl alcohol resin film is preferably implemented to be impregnated in water before dyeing is handled in advance
Make its processing being swelled.
In the case where using iodine as dichroism pigment, it is typically employed in the aqueous solution containing iodine and KI and impregnates
The method that polyvinyl alcohol resin film is dyed.
The content of iodine in the aqueous solution is usually 0.01~1 parts by weight or so relative to the parts by weight of water 100, KI
Content is usually 0.5~20 parts by weight or so relative to the parts by weight of water 100.Temperature for the aqueous solution of dyeing is usually 20~
40 DEG C or so.In addition, the dip time (dyeing time) in the aqueous solution is usually 20~1,800 seconds or so.
On the other hand, in the case of dichroic organic dye is used as dichroism pigment, it is typically employed in comprising water-soluble
Property dichroic organic dye the aqueous solution in dipping polyvinyl alcohol resin film and the method that is dyed.In the aqueous solution
The content of dichroic organic dye is usually 1 × 10 relative to the parts by weight of water 100-4~10 parts by weight or so, preferably 1 × 10-3
~1 parts by weight.The aqueous dye solutions can also contain the inorganic salts of sodium sulphate etc as dyeing assistant.Two colors for dyeing
The temperature of property aqueous dye solutions is usually 20~80 DEG C or so.In addition, the dip time (dyeing time) in the aqueous solution leads to
It is often 10~1,800 seconds or so.
After being dyed using dichroism pigment boric acid processing can by by the polyvinyl alcohol resin film after dyeing containing
The method impregnated in the aqueous solution of boric acid is carried out.The content of boric acid in boracic aqueous acid is logical relative to the parts by weight of water 100
Often it is 2~15 parts by weight or so, preferably 5~12 parts by weight.In the case where using iodine as dichroism pigment, the boronic acid containing
The aqueous solution preferably comprise KI.The content of KI in boracic aqueous acid is usually 0.1 relative to the parts by weight of water 100
~15 parts by weight or so, preferably 5~12 parts by weight.Dip time in the aqueous solution of boronic acid containing is usually 60~1,200
Or so second, preferably 150~600 seconds, more preferably 200~400 seconds.The temperature of the aqueous solution of boronic acid containing is usually 50 DEG C
Above, it is preferably 50~85 DEG C, more preferably 60~80 DEG C.
Washing process generally is carried out to the polyvinyl alcohol resin film after boric acid processing.Washing process can for example be utilized will
Method of the polyvinyl alcohol resin film immersion in water after being handled through boric acid is carried out.The temperature of water in washing process is usual
For 5~40 DEG C or so.In addition, dip time is usually 1~120 second or so.
Implement drying process after washing, obtain polarizer.Drying process can use air drier or far infrared to add
Hot device is carried out.The temperature of drying process is usually 30~100 DEG C or so, is preferably 50~80 DEG C.The time of drying process is usual
For 60~600 seconds or so, preferably 120~600 seconds.The moisture content of polarizer is reduced to by practical level by drying process.
The moisture content is usually 5~20 weight % or so, is preferably 8~15 weight %.If moisture content is less than 5 weight %, it can lose
The flexibility of polarizer, occurs damage or is broken after the drying sometimes.If in addition, moisture content is more than 20 weight %, in the presence of hot steady
Qualitative not enough tendency.
There is the polarizer of dichroism pigment according to the gas absorption quantity on polyvinyl alcohol resin film can be manufactured with upper type.
In addition, the stretching of polyvinyl alcohol resin film in the manufacturing process of polarizer, dyeing, boric acid processing, washing work
Sequence, drying process can for example be carried out according to the method described in Japanese Unexamined Patent Publication 2012-159778.Recorded in the document
In method, the polyvinyl alcohol resin layer that polarizer is formed into by the pva coating system resin on base material film is used
Method it is also useful.
In order to which the difference of the crimp force of polarization plates is adjusted into the scope of the present invention, the 1st polarization plates and the 2nd polarization plates are had
The thickness of polarizer be both preferably less than 20 μm, more preferably less than 15 μm.Further preferably make that the 1st polarization plates have is inclined
The thickness of polarizer that is had by more than 10 μm, the 2nd polarization plates of thickness of piece of shaking is less than 10 μm.It is good that can assign
The aspect of optical characteristics, the thickness of polarizer is usually more than 3 μm.The crimp force of polarization plates is also inclined by polarizer and reflection-type
The influence that the piece that shakes shrinks, therefore by making the thickness of polarizer be less than 20 μm, what is further had to the 1st polarization plates is inclined
Shake piece the polarizer that has of thickness and the 2nd polarization plates thickness setting as defined in thickness difference, so as to be easily adjusted crimp force
Difference.
[diaphragm]
As diaphragm 30a, 30b, 31a, 31b, the diaphragm formed by appropriate transparent resin can be used.It is specific and
Speech, preferably uses the diaphragm for including the excellent polymer such as transparent, uniform optical characteristics, mechanical strength, heat endurance.
As such a transparent resin film, it can use for example：The cellulose mesentery such as tri acetyl cellulose and diacetyl cellulose；It is poly-
The polyester mesentery such as ethylene glycol terephthalate, polyethylene glycol isophthalate and polybutylene terephthalate (PBT)；Poly- (first
Base) acrylic acid mesentery such as methyl acrylate and poly- (methyl) ethyl acrylate；Makrolon mesentery；Polyether sulfone mesentery；Polysulfones system
Film；Polyimides mesentery；Polyolefin mesentery；Polynorbornene mesentery etc..But do not limited by these transparent resin films.
Diaphragm 30a, 30b suitable for the 1st polarization plates 10 and can suitable for diaphragm 31a, 31b of the 2nd polarization plates 11
To be each independently identical diaphragm, or different diaphragms.
In terms of the difference for being easily adjusted crimp force, it is adaptable to which the diaphragm 30a and 30b of the 1st polarization plates 10 preferably make it
Moisture permeability is equal extent, and the size of the difference of moisture permeability is preferably 750g/ under conditions of 40 DEG C of temperature, relative humidity 90%
(m224hr) below, more preferably 500g/ (m224hr) below.Moisture permeability refers to the cup according to specified in JIS Z 0208
The value that method is determined.In order that the difference of moisture permeability be equal extent, for example diaphragm 30a and 30b using phase same material material,
Or diaphragm using the material of the small material of moisture permeability another diaphragm using the big material of moisture permeability material
When, the method that surface-treated layer (being preferably hard conating) is set on the big diaphragm of the moisture permeability can be set forth in.
On the other hand, it is adaptable to which the diaphragm 31a and 31b of the 2nd polarization plates 11 preferably both moisture permeabilitys are different, moisture permeability it
The size of difference is preferably 750g/ (m under conditions of 40 DEG C of temperature, relative humidity 90%2More than 24hr), more preferably
1000g/(m2More than 24hr).For example, the material by using unlike material in diaphragm 31a and 31b, so as to increase
The difference of big moisture permeability.It is also preferable to which only there is protection in the one side of polarizer to omit the diaphragm 31b of the 2nd polarization plates
The composition of film, now, diaphragm 31a moisture permeability is preferably 500g/ (m224hr) below, more preferably 250g/ (m2·
24hr) below.
Above-mentioned diaphragm can implement saponification process, sided corona treatment, bottom before polarizer is fitted to its binding face
The easily bonding processing such as painting processing, anchoring coating process.The thickness of diaphragm is usually 5~200 μm or so of scope, preferably 10
More than μm, and preferably less than 80 μm, more preferably less than 40 μm, particularly preferably less than 35 μm.
In addition, for surface optical characteristics or other features needed for assigning, can be set in diaphragm 30a outer surface
Coating (surface-treated layer).The concrete example of coating layer includes hard conating, antiglare layer, anti-reflection layer, antistatic layer, stain-proofing layer.Shape
Method into coating layer is not particularly limited, and can use known method.
It is transverse electric (IPS in liquid crystal cells：In-Plane Switching) in the case of pattern, due to this will not be damaged
The wide viewing angle characteristic of IPS mode liquid crystal cells inherently, therefore the phase of diaphragm 30b and diaphragm 3lb thickness direction
Difference Rth is preferably -10~10nm scope.In addition, the phase difference value Re in face is preferably also -10~10nm scope.
The phase difference value Rth of thickness direction is that the value that the mean refractive index in face is subtracted obtained by the refractive index of thickness direction multiplies
To be worth obtained by the thickness of film, defined by following formula (a).Multiply in addition, the phase difference value Re in face is refringence in face
To be worth obtained by the thickness of film, defined by following formula (b).
Rth=((nx+ny)/2-nz) × d (a)
Re=(nx-ny) × d (b)
In formula, nx is the refractive index in the x-axis direction (slow-axis direction in face) in film surface, and ny is the y-axis direction (face in film surface
Interior quick shaft direction and orthogonal with x-axis direction in face) refractive index, nz be the z-axis direction (thickness direction) vertical with film surface
Refractive index, moreover, d be film thickness.
Here, phase difference value can be any wavelength in the range of immediate vicinity i.e. 500~650nm or so of visible ray
Under value, but standard is used as using the phase difference value under wavelength 590nm in this manual.The phase difference value Rth of thickness direction
And the phase difference value Re in face can use commercially available various phasometers to determine.
As being the method in the range of -10~10nm by the phase difference value Rth controls of the thickness direction of diaphragm, it can arrange
Lift reduce as much as possible in the face of remaining in when making film and thickness direction strain method.For example, in above-mentioned solvent cast
In method, can use when making using heat treatment and dry the cast resin solution in the face that produces and the residual of thickness direction shrink should
Method become slack etc..On the other hand, can be using following methods etc. in above-mentioned extrusion by melting：In order to prevent resin film
Extrude and be stretched during cooling from die head, and shorten the distance from die head to chilling roll as much as possible, and
The rotary speed of extrusion capacity and chilling roll is controlled in the way of film is stretched.Alternatively, it is also possible to same with solvent casting method
The method for using the strain relaxation for the film for making to residue in gained using heat treatment sample.
[reflection type polarizer 50]
The 2nd polarization plates 11 of the present invention have reflection type polarizer 50.Fig. 4 is reflection type polarizer used in the present invention
The schematic cross sectional views of one.Reflection type polarizer 50 is to make the layer A with birefringence with not having birefringence substantially
Multi-layer laminate obtained by the layer B of property is alternately laminated.For example, in illustrated example, the refractive index nx in A layers of x-axis direction is more than y-axis
The refractive index nx and the refractive index ny in y-axis direction in the x-axis direction of ny, B layers of the refractive index in direction are substantially identical.Therefore, A layers and B
The refringence of layer is larger in x-axis direction, and zero is substantially in y-axis direction.Its result is：X-axis direction turns into axis of reflection, y-axis side
To as the axis of homology.A layers are preferably 0.2~0.3 with the B layers of refringence in x-axis direction.It is explained, x-axis direction and reflection
The draw direction correspondence of polarizer.
Above-mentioned A layers is preferably made up of the material that birefringence is shown by stretching.As the typical example of such a material,
Naphthalenedicarboxylic acid polyester (such as PEN), makrolon and acrylic resin (such as poly- methyl can be enumerated
Methyl acrylate).It is preferred that PEN.Above-mentioned B layers is not preferably also shown substantially by being stretched even if progress
The material of birefringence is constituted.As the typical example of such a material, the copolyesters of naphthalenedicarboxylic acid and terephthalic acid (TPA) can be enumerated.
Reflection type polarizer transmits the light (such as p ripples) with the 1st polarization direction at A layers with B layers of interface, makes to have
Light (such as s ripples) reflection of 2nd polarization direction orthogonal with the 1st polarization direction.The light of reflection is one on the A layers of interface with B layers
Part is transmitted as the light with l polarization directions, and a part reflects as the light with the 2nd polarization direction.In reflection
The inside of type polarizer, is repeated a number of times reflection as described above and transmits, thus can improve the utilization ratio of light.
Reflection type polarizer 50 preferably comprises reflecting layer R as the outermost layer with the opposite side of polarizer 21.It is anti-by setting
A layer R is penetrated, can the further outermost light that is being back to reflection type polarizer using final not utilized, therefore can be further
Improve the utilization ratio of light.
It is representational to be for the R of reflecting layer, reflection function is shown by the sandwich construction of polyester resin layer.
The integral thickness of reflection type polarizer can be appropriate according to total number of the layer contained by purpose, reflection type polarizer etc.
Ground is set.From the viewpoint of change in size when suppressing hot environment, the integral thickness of reflection type polarizer is preferably 15 μm
~50 μm, more preferably less than 30 μm.
As reflection type polarizer, for example, the reflective polarizing described in Japanese Kohyo 9-507308 publications can be used
Piece.
Commercially available product can be used directly in reflection type polarizer 50, can also carry out commercially available product after secondary operation (such as stretching) again
Use.As commercially available product, trade name DBEF, APF of such as 3M company systems can be enumerated.
[polarizer is fitted with diaphragm]
Polarizer can be fitted with fitting for diaphragm using bonding agent or adhesive.Polarizer and diaphragm are entered
The thickness of the adhesive phase of row laminating can be 0.01~30 μm or so, more preferably preferably 0.01~10 μm, 0.05~5 μ
m.If the thickness of adhesive phase is the scope, it will not be produced between the diaphragm and polarizer being laminated and float, peel off, obtained
To the bonding force of no problem in practical.The thickness for the adhesive phase that polarizer and diaphragm are fitted can be 5~50 μ
M or so, preferably 5~30 μm, more preferably 10~25 μm.
When polarizer is Nian Jie with diaphragm, polarizer, diaphragm are carried out in advance saponification process, sided corona treatment, etc. from
Daughter processing etc. is also useful.
(bonding agent)
Appropriate bonding agent can be suitably used according to species, the purpose of adherend when forming adhesive phase, in addition,
Anchor coating agent can also be used as needed.As bonding agent, such as solvent type adhesive, emulsion-type adhesive, pressure-sensitive can be enumerated
Bonding agent, remoistenable adhesive, condensation polymer type bonding agent, no-solvent type bonding agent, film-like adhesive, hot melt adhesive etc..
As one of preferred bonding agent, water system bonding agent, i.e. bonding agent composition can be enumerated and be dissolved or dispersed in the viscous of water
Connect agent.If enumerating the example for the bonding agent composition that can be dissolved in water, there is polyvinyl alcohol resin.If can in addition, enumerating
The example for the bonding agent composition being dispersed in water, then have the polyurethane series resin with hydrophilic radical.Water system bonding agent can be by
Such a bonding agent composition mixes to prepare together with the additive of the addition coordinated as needed in water.If enumerating to turn into
The example of the commercially available polyvinyl alcohol resin of water system bonding agent, the conduct that Ze You Kuraray Co., Ltd. sells is carboxy-modified poly-
" KL-318 " of vinyl alcohol etc..
Water system bonding agent can contain crosslinking agent as needed.If enumerating the example of crosslinking agent, there are amines, hydroformylation
Compound, methylol compound, water-soluble epoxy resin, isocyanate compound, multivalent metal salt etc..With polyethenol series tree
In the case that fat is as bonding agent composition, preferably use aldehyde compound using glyoxal as representative, using melamine methylol as
Methylol compound, water-soluble epoxy resin of representative etc. are used as crosslinking agent.
Here, water-soluble epoxy resin for example can be to make the poly- alkylene of diethylenetriamines, trien etc
The reaction product of Quito amine and the dicarboxylic acids of adipic acid etc is polyamide ring obtained from polyamide polyamines and epichlorohydrin reaction
Oxygen tree fat.If enumerating the example of the commercially available product of water-soluble epoxy resin, there is what is sold from Taoka Chemical Industries Co. Ltd.
" Sumirez Resin (registration mark) 650 (30) " etc..
Water system bonding agent is coated with the bonding plane of polarizer and/or the diaphragm for fitting in the polarizer, both are fitted
Afterwards, drying process is implemented, it is hereby achieved that polarization plates.Before bonding, at diaphragm implementation saponification process, corona discharge
The easy bonding processing of reason, corona treatment or primary coat processing etc comes in advance that to improve wetability also effective.Drying temperature is for example
It can be 50~100 DEG C or so.Further improve bonding force in terms of, preferably drying process after slightly above room temperature temperature
The temperature maintenance 1~10 day or so of such as 30~50 DEG C or so of degree.
As another preferred bonding agent, the curability solidified using the irradiation or heating of active energy beam can be enumerated
Adhesive composite.As curability adhesive composite, such as free radical comprising acrylic compounds etc can be enumerated
The curability adhesive composite of polymerizable compound, cationically polymerizable compound comprising epoxy based compound etc are consolidated
The property changed adhesive composite.These compositions preferably contain radical polymerization initiator or cationic polymerization initiators respectively.
And then, curability adhesive composite can contain other additives, example on the premise of its cementability is not damaged
Such as ion trap agent, antioxidant, chain-transferring agent, sensitizer, tackifier, thermoplastic resin, filler, flow modifier, increasing
Mould agent, defoamer etc..As ion trap agent, for example powdered bismuth system, antimony system, magnesium system, aluminium system, calcium system, titanium system can be enumerated
And the inorganic compound of their mixed stocker etc., as antioxidant, it can enumerate such as hindered phenol series antioxidant.
Curability adhesive composite is being coated on to the bonding plane or the bonding plane of both of polarizer or diaphragm
Afterwards, fitted with the face for being coated with bonding agent, and make uncured bonding by irradiating active energy beam or heating
Oxidant layer solidifies, so as to so that polarizer is Nian Jie with diaphragm.As the coating method of bonding agent, can using such as scraper,
The various coating methods such as bar, die coating machine, comma coater, gravure coater.
The curability adhesive composite can substantially come as the substantially no-solvent type bonding agent not comprising solvent
Use, due to there is respective optimum viscosity scope in each application pattern, therefore in order to adjust viscosity, can contain it molten
Agent.Solvent does not reduce the optical property of polarizer preferably and dissolves each composition by representative of epoxide well
Organic solvent, can use such as the hydro carbons using toluene as representative, using ethyl acetate as the esters of representative.
In the case of the solidification using the irradiation of active energy beam to carry out adhesive composite, before can using
The various active energy beams described, still, aspect that is calm easy to operate and being also easily controlled irradiate light quantity etc. set out, preferably
Use ultraviolet.Active energy beam such as ultraviolet irradiation intensity, exposure can to using the degree of polarization of polarizer as
The various optical properties that represent and do not caused as the various optical properties of representative using the transparency, the phase difference characteristics of diaphragm
Suitably determined in the way of ensuring appropriate productivity ratio in the range of influence.
[adhesive]
As adhesive, as long as optical transparence is excellent and includes the viscous of appropriate wetability, coherency, cementability etc.
The adhesive of excellent is closed, it is preferred that the also excellent adhesive such as durability.Specifically, as formation adhesive
The adhesive of layer, preferably comprises the adhesive (acrylic adhesive) of acrylic resin.
Contained acrylic resin is with butyl acrylate, ethyl acrylate, acrylic acid in acrylic adhesive
The alkyl acrylate of different monooctyl ester and acrylic acid-2-ethyl caproite etc as principal monomer resin.In the acrylic acid series tree
Usual copolymerization polarized monomer in fat.Polar monomer is the compound with polymerism unsaturated bond and polar functional group, here,
Polymerism unsaturated bond is usually from (methyl) acryloyl group, in addition, polar functional group can be carboxyl, hydroxyl, amide groups, ammonia
Base, epoxy radicals etc..If enumerating the concrete example of polar monomer, have (methyl) acrylic acid, (methyl) 2-hydroxypropyl acrylate,
(methyl) 2-Hydroxy ethyl acrylate, (methyl) acrylamide, (methyl) acrylic acid 2-N, N- dimethylaminoethyl, (methyl)
Glycidyl acrylate etc..
In addition, crosslinking agent is generally combined with together with acrylic resin in acrylic adhesive.
As the typical example of crosslinking agent, can be set forth in intramolecular has the isocyanic acid of at least two isocyanate base (- NCO)
Ester compounds.
Various additives can further be coordinated in adhesive.As suitable additive, can enumerate silane coupler,
Antistatic additive etc..Silane coupler is effective in terms of the bonding force of raising and glass.Antistatic additive is reducing or prevented electrostatic
The aspect of generation is effective.
Adhesive phase can be formed by the following method：Prepare adhesive ingredients as described above and be dissolved in organic solvent
Adhesive composition, be directly coated on polarizer or on diaphragm, re-dry remove solvent method；Or
Person, above-mentioned adhesive composition is coated with the demoulding process face of the base material film comprising resin film for implementing demoulding processing,
Dry and remove solvent, adhesive phase is made, is fitted on transparent protective film, the method for transferring adhesive phase.Before utilization
Being directly coated with method of person and in the case of forming adhesive phase on transparent protective film, it is common practice to：In the laminating of its surface
Implemented the resin film (also referred to as barrier film) of demoulding processing, adhesive layer surface was temporarily pasted untill when using
Protection.From the operational viewpoint grade of the adhesive composition as organic solvent solution, mostly using the transfer of the latter
Method, now, be used primarily for being formed the base material film by demoulding processing of adhesive phase after polarization plates are fitted in can directly into
For barrier film, from this side considerations, situation is also advantageous.
It is pre- advanced to polarizing unilateral, protection film surface and adhesive face before adhesive phase is laminated on into polarizer, diaphragm
The way of row sided corona treatment, corona treatment etc. is also useful.
[stackings of other components]
Adhesive phase can be used in the stacking of polarization plates and liquid crystal cells, for being laminated reflection type polarizer 50
Bonding agent or adhesive can be used in adhesive linkage, the laminating of any one preferably uses adhesive.As long as adhesive phase light
The excellent adhesive phase of the adhesion characteristic of wetability, coherency, cementability transparent excellent and comprising appropriateness etc. is learned, but
It is preferred that the also excellent adhesive phase such as durability.Specifically, as the adhesive for forming adhesive phase, acrylic acid is preferably comprised
It is the adhesive (acrylic adhesive) of resin.
As adhesive phase, it can use and the adhesive phase used in the fitting of above-mentioned polarizer and diaphragm
Equal adhesive phase.Adhesive can use each different adhesives, can also use same adhesive.
Before adhesive phase is laminated on into polarization plates, corona is carried out to polarizing unilateral, protection film surface and adhesive face in advance
The way of processing, corona treatment etc. is also useful.In addition, when being laminated reflection type polarizer, in advance to reflection type polarizer
The way that 50 binding face and adhesive face carry out sided corona treatment, corona treatment etc. is also useful.It is inclined for being laminated reflection-type
The adhesive phase of piece 50 of shaking is preferably less than 25 μm.More preferably less than 15 μm.Generally, the thickness of adhesive phase is more than 3 μm.
[liquid crystal cells, liquid crystal panel]
Liquid crystal cells have 2 blade unit substrates and the liquid crystal layer being held between the two substrates.Cell substrate is generally more
It is made up of glass, however, it is possible to think plastic base.In addition, the liquid crystal cells used in the liquid crystal panel of the present invention are in itself
Can be used in the field various liquid crystal cells (such as the IPS patterns of drive pattern, VA patterns, TN patterns etc.
Etc known pattern) constitute.Recently, the thickness of liquid crystal cells is thinning, and its rigidity dies down, thus when liquid crystal panel is made
It is very easy to produce warpage.The conventional polarization plates group of warpage therefore, it is possible to reduce liquid crystal panel can be big to thickness (for example
More than 0.5mm) liquid crystal cells play effect, but in the case where being applied to slim liquid crystal cells, can also sometimes
Liquid crystal panel is set to produce warpage.However, according to the present invention polarization plates group, even if the thickness of the liquid crystal cells be below 0.4mm,
And then be below 0.3mm, warpage can also be significantly decreased.In the present invention, the thickness of liquid crystal cells includes liquid crystal layer and folder
Hold the thickness of a pair of substrates of liquid crystal layer.
As shown in figure 5, by the way that the polarization plates group of the present invention is fitted in into liquid crystal cells across adhesive phase, so as to make
Make liquid crystal panel.
From another viewpoint, the exhausted value of the amount of warpage of liquid crystal panel of the invention in 85 DEG C of heating 250 hours is
Below 0.5mm, preferably below 0.3mm.By the way that the polarization plates group of the present invention is fitted in into liquid crystal cells, so that the liquid of the present invention
The warpage of crystal panel in high temperature environments is suppressed, as the one-piece type liquid crystal of front panel being accommodated in the housing of end article
Display panel.
From can make the more significant aspect of effect of the present invention, polarization plates are preferably shaped to long side and short side
Rectangular shape.In the case where the polarization plates of the present invention are the rectangular shape with long side and short side, the length and short side on long side
Length ratio be preferably 10: 1~1: 1, more preferably 2: 1~1: 1.In addition, for the size of polarization plates, the length on its long side
Degree is preferably more than 50mm, more preferably more than 150mm, in addition, the length of its short side is preferably more than 40mm, is more preferably
More than 80mm.Specifically, the size of polarization plates of the invention is for example preferably more than 2.7 types (55mm × 41mm) and excellent
Elect 11.3 types (174mm × 231mm) as below.
[embodiment]
Hereinafter, enumerate embodiment and further illustrate the present invention, but the present invention is not limited by these examples.In example,
" part " and " % " for representing content or usage amount is then weight basis unless otherwise specified.It is explained, following example
In the measure of each physical property carry out in accordance with the following methods.
(1) measure of thickness：
It is determined using the digital micrometer " MH-15M " of Nikon Corp.
(2) measure of crimp force
As shown in figure 3, first, polarization plates to be cut into the square of 100mm square, now, each side of polarization plates is relative
45 degree are tilted in the absorption direction of principal axis of polarization plates.Then, enter the polarization plates for being about to cut out and stand 5 minutes in the environment of 85 DEG C
Heat treatment, crimp polarization plates 70.Double one that the diagonal orthogonal with absorbing direction of principal axis of polarization plates after curling is risen
Side is fixed on glass plate using adhesive tape.The pressing to electronics Libra is applied to the summits of loose polarization plates in this condition
Power, crimp force is set to by the power for making polarization plates be in flat state.
(3) measure of the amount of warpage of liquid crystal panel
The amount of warpage of made liquid crystal panel in high temperature environments is determined in accordance with the following methods.First, will be made
After liquid crystal display panel stands 250 hours in the environment of 85 DEG C, the 1st polarization plates are made to be positioned over Nikon Corp as upside
The two-dimentional analyzer of system is " on NEXIV VMR-12072 " measure platform.Then, focal point is made in the surface for determining platform, with it
On the basis of, make focal point in 4 corners of liquid crystal panel, each center and the center of liquid crystal panel surface on 4 sides, determine with making
On the basis of focus distance after, will be in liquid crystal by the distance distance most long using in terms of absolute value with determining platform as amount of warpage
The warpage that the depths of the observation side panel of panel is tilted is set to positive warpage, and the warpage that the depths of overleaf side panel is tilted is set to
Negative warpage.Result is summarized in table 1.
(4) moisture permeability of diaphragm is determined
For moisture permeability, according to agar diffusion method specified in JIS Z 0208 under conditions of 40 DEG C of temperature, relative humidity 90%
It is determined.
[embodiment 1]
Observation side polarization plates make in such a way.By the polyvinyl alcohol film of 30 μm of thickness, (average degree of polymerization is about
2400th, 99.9 moles of more than % of saponification degree) the longitudinal uniaxial tension of dry type stretching is utilized to about 5 times, then in the case where keeping tense situation
After being impregnated 1 minute in 60 DEG C of pure water, in the aqueous solution of the weight than 28 DEG C for 0.05/5/100 of iodine/KI/water
Dipping 60 seconds.Then, impregnated 300 seconds in the aqueous solution of the weight than 72 DEG C for 8.5/8.5/100 of KI/boric acid/water.
Next, being cleaned with 26 DEG C of pure water after 20 seconds, processing is dried at 65 DEG C, obtaining the gas absorption quantity on polyvinyl alcohol film has
The polarizer of 12 μm of the thickness of iodine.
Then, in the both sides of the polarizer, it is coated on carboxy-modified the polyvinyl alcohol (" KL- of Kuraray Co., Ltd.
318 ") 3 parts by weight are dissolved in the parts by weight of water 100 and are prepared into the aqueous solution of polyvinyl alcohol water solution with relative to the weight of water 100
Amount part is mixed with water soluble polyamide the epoxy resin (" Sumirez of Sumitomo Chemical Co for the ratio of 1.5 parts by weight
Resin (registration mark) 650 (30) ", the weight % of solid component concentration 30) obtained by water system bonding agent, laminating be used as diaphragm
Be laminated on the tri acetyl cellulose film (trade name " KC2UA " of Konica Minolta Co. Ltd. systems) of 25 μm of thickness
There is ENB mesentery (the Japanese ZEON plants of formula of the film and 23 μm of thickness being not stretched of the acrylic acid series hard conating of 7 μm of thickness
The trade name " ZEONOR (registration mark) " of commercial firm).Polarization plates are dried 5 minutes at 80 DEG C, conserved 168 hours at 40 DEG C.
Afterwards, in the adhesive (trade name " #KT " of LINTEC Co. Ltd. systems) of 20 μ m-thicks of ENB mesentery side laminating, seen
Examine lateral deviation vibration plate.
Under conditions of 40 DEG C of temperature, relative humidity 90%, acrylic acid is laminated with above-mentioned tri acetyl cellulose film
The moisture permeability for being the film of hard conating is 450g/ (m224hr), the moisture permeability of above-mentioned ENB mesentery is 6g/ (m2·24hr)。
The difference of moisture permeability is 444g/ (m2·24hr)。
Rear side polarization plates make in such a way.By the polyvinyl alcohol film of 20 μm of thickness, (average degree of polymerization is about
2400th, 99.9 moles of more than % of saponification degree) the longitudinal uniaxial tension of dry type stretching is utilized to about 5 times, then in the case where keeping tense situation
After being impregnated 1 minute in 60 DEG C of pure water, in the aqueous solution of the weight than 28 DEG C for 0.05/5/100 of iodine/KI/water
Dipping 60 seconds.Then, impregnated 300 seconds in the aqueous solution of the weight than 72 DEG C for 8.5/8.5/100 of KI/boric acid/water.
Next, being cleaned with 26 DEG C of pure water after 20 seconds, processing is dried at 65 DEG C, obtaining the gas absorption quantity on polyvinyl alcohol film has
The polarizer of 7 μm of the thickness of iodine.
Above-mentioned water system bonding agent is coated on to the one side of polarizer, the ENB fitted as 13 μm of the thickness of diaphragm
Mesentery (phase difference value Re in the face under the trade names " ZEONOR (registration mark) " of Japanese ZEON Co. Ltd. systems, wavelength 590nm
=0.8nm).Polarization plates is dried 5 minutes at 80 DEG C, conserved 168 hours at 40 DEG C.In another side 5 μ m-thicks of laminating of polarizer
Adhesive (trade name " #L2 " of LINTEC Co. Ltd. systems), and brightness enhancement film (3M commodity for 26 μ m-thicks of fitting thereon
Name " Advanced Polarized Film, Version 3).Afterwards, in the adhesive of 20 μ m-thicks of ENB mesentery side laminating
(trade name " #KT " of LINTEC Co. Ltd. systems), obtains rear side polarization plates.In the bar of 40 DEG C of temperature, relative humidity 90%
Under part, the moisture permeability of above-mentioned ENB mesentery is 30g/ (m2·24hr)。
[embodiment 2]
Observation side polarization plates make in such a way.The polarizer of 12 μm of thickness is made similarly to Example 1, and
The water system bonding agent recorded in its double spread embodiment 1, in triacetyl of the one side laminating as 25 μm of the thickness of diaphragm
The triacetyl of 20 μm of cellulose membrane (trade name " KC2UA " of Konica Minolta Opto Co. Ltd. systems) and thickness is fine
The plain film of dimension (phase difference in the face under the trade names " KC2CTW " of Konica Minolta Opto Co. Ltd. systems, wavelength 590nm
Value R0=1.2nm, thickness direction phase difference value Rth=1.3nm).Polarization plates is dried 5 minutes at 80 DEG C, 168 are conserved at 40 DEG C
Hour.Afterwards, fitted in the tri acetyl cellulose film side of 20 μm of thickness 20 μ m-thicks adhesive (LINTEC Co. Ltd. systems
Trade name " #KT "), obtain observation side polarization plates.
Under conditions of 40 DEG C of temperature, relative humidity 90%, the moisture-inhibiting of the tri acetyl cellulose film of above-mentioned 25 μm of thickness
Spend for 1200g/ (m224hr), the moisture permeability of the tri acetyl cellulose film of above-mentioned 20 μm of thickness is 1660g/ (m2·24hr)。
The difference of moisture permeability is 460g/ (m2·24hr)。
The rear side polarization plates overleaf used in lateral deviation vibration plate using embodiment 1.
[embodiment 3]
Observation side polarization plates make in such a way.The polarizer of 7 μm of thickness is made similarly to Example 1, and
The water system bonding agent recorded in its double spread embodiment 1, one side laminating as diaphragm 25 μm of thickness triacetyl
The propylene of 7 μm of thickness is laminated with base cellulose membrane (trade name " KC2UA " of Konica Minolta Opto Co. Ltd. systems)
The film of acid system hard conating and the tri acetyl cellulose film (business of Konica Minolta Opto Co. Ltd. systems of 20 μm of thickness
Phase difference value R in face under the name of an article " KC2CTW ", wavelength 590nm0=1.2nm, thickness direction phase difference value Rth=1.3nm).Make
Polarization plates are dried 5 minutes at 80 DEG C, are conserved 168 hours at 40 DEG C.Afterwards, in the tri acetyl cellulose film side patch of 20 μm of thickness
The adhesive (trade name " #KT " of LINTEC Co. Ltd. systems) of 20 μ m-thicks is closed, observation side polarization plates are obtained.
Under conditions of 40 DEG C of temperature, relative humidity 90%, the moisture-inhibiting of the tri acetyl cellulose film of above-mentioned 25 μm of thickness
Spend for 1200g/ (m224hr), the moisture permeability of the tri acetyl cellulose film of above-mentioned 20 μm of thickness is 1660g/ (m2·24hr)。
The difference of moisture permeability is 460g/ (m2·24hr)。
The rear side polarization plates overleaf used in lateral deviation vibration plate using embodiment 1.
[comparative example 1]
The observation side polarization plates used in observation side polarization plates using embodiment 2.
Rear side polarization plates make in such a way.The polarizer of 12 μm of thickness is made similarly to Example 1, and
The water system bonding agent recorded in its double spread embodiment 1, in triacetyl of the one side laminating as 25 μm of the thickness of diaphragm
Cellulose membrane (trade name " KC2UA " of Konica Minolta Opto Co. Ltd. systems) and 15 μm of thickness being not stretched
ENB mesentery (phase difference value in the face under the trade name " ARTON (registration mark) " of JSR Corp., wavelength 590nm
R0=0nm, thickness direction phase difference value Rth=0nm).Polarization plates is dried 5 minutes at 80 DEG C, conserved 168 hours at 40 DEG C.
The adhesive (trade name " #L2 " of LINTEC Co. Ltd. systems) of 5 μ m-thicks of tri acetyl cellulose film side laminating, and pasted thereon
Close the brightness enhancement film (3M trade name " Advanced Polarized Film, Version 3) of 26 μ m-thicks.Afterwards, in drop ice
The adhesive (trade name " #KT " of LINTEC Co. Ltd. systems) of 20 μ m-thicks of piece alkene mesentery side laminating, obtains rear side polarization plates.
Under conditions of 40 DEG C of temperature, relative humidity 90%, the moisture permeability of above-mentioned tri acetyl cellulose film is 1200g/
(m224hr), the moisture permeability of above-mentioned ENB mesentery is 140g/ (m2·24hr).The difference of moisture permeability is 1060g/ (m2·
24hr)。
[comparative example 2]
The observation side polarization plates used in observation side polarization plates using embodiment 1.
The polarization plates of rear side polarization plates make in such a way.First, using dry type stretching by 60 μm of thickness
Polyvinyl alcohol film (average degree of polymerization about 2,400,99.9 moles of more than % of saponification degree) uniaxial tension is to about 5 times, then is keeping tight
After being impregnated 1 minute in 60 DEG C of pure water under state, iodine/KI/water weight than 28 DEG C for 0.05/5/100
Impregnated 60 seconds in the aqueous solution.Then, soaked in the aqueous solution of the weight than 72 DEG C for 8.5/8.5/100 of KI/boric acid/water
Stain 300 seconds.Next, with after 26 DEG C of pure water 20 seconds, in 65 DEG C of dryings, obtaining the gas absorption quantity on polyvinyl alcohol film
There is the polarizer of 23 μm of the thickness of iodine.
Then, the water system bonding agent recorded in the double spread embodiment 1 of above-mentioned 23 μm of polarizer, laminating is used as protection
The tri acetyl cellulose film (trade name " KC4UY " of Konica Minolta Opto Co. Ltd. systems) of 40 μm of the thickness of film
With 23 μm of the ENB mesentery (trade name " ZEONOR (registrars of Japanese ZEON Co. Ltd. systems of the thickness being not stretched
Mark) ").Polarization plates is dried 5 minutes at 80 DEG C, conserved 168 hours at 40 DEG C.In 5 μ m-thicks of tri acetyl cellulose film side laminating
Adhesive (trade name " #L2 " of LINTEC Co. Ltd. systems), and brightness enhancement film (3M commodity for 26 μ m-thicks of fitting thereon
Name " Advanced Polarized Film, Version 3).Afterwards, in the adhesive of 20 μ m-thicks of ENB mesentery side laminating
(trade name " #KT " of LINTEC Co. Ltd. systems), obtains rear side polarization plates.
Under conditions of 40 DEG C of temperature, relative humidity 90%, the moisture permeability of above-mentioned tri acetyl cellulose film is 830g/
(m224hr), the moisture permeability of above-mentioned ENB mesentery is 6g/ (m2·24hr).The difference of moisture permeability is 824g/ (m2·
24hr)。
[comparative example 3]
The observation side polarization plates used in observation side polarization plates using embodiment 2.
The rear side polarization plates overleaf used in lateral deviation vibration plate using comparative example 1.
[making of liquid crystal panel]
Using the polarization plates group made in above-described embodiment 1~3 and comparative example 1~3, liquid crystal surface is made in such a way
Plate.First, observation side polarization plates are cut diagonally 7 inches in the mode for making absorption axiss parallel relative to the short side of liquid crystal cells
Rear side polarization plates are cut diagonally 7 inches of chis by size in the mode for making absorption axiss parallel relative to the long side of liquid crystal cells
It is very little.Then, by adhesive phase by a pair of the polarization plates cut out so that the short side of 2 polarization plates and the short side of liquid crystal cells are put down
Capable mode is fitted on liquid crystal cells.The thickness of used liquid crystal cells is 0.4mm.
Result above is as shown in table 1.
[table 1]
| Crimp force C1 [gf] | Crimp force C2 [gf] | C2-C1[gf] | Amount of warpage [mm] | |
| Embodiment 1 | 0.36 | 1.13 | 0.77 | +0.26 |
| Embodiment 2 | 0.27 | 1.13 | 0.86 | +0.33 |
| Embodiment 3 | 0.66 | 1.13 | 0.47 | -0.45 |
| Comparative example 1 | 0.27 | 1.90 | 1.63 | -1.00 |
| Comparative example 2 | 0.36 | 0.58 | 0.22 | -1.12 |
| Comparative example 3 | 0.66 | 1.90 | 1.24 | -1.28 |
Industrial applicability
According to the present invention it is possible to eliminate the warpage of liquid crystal panel in high temperature environments, and it can obtain in hot environment
Under the housing for being accommodated in final products liquid crystal panel, therefore be useful.
Symbol description
10 the 1st polarization plates, 11 the 2nd polarization plates
20th, 21 polarizer
30a, 30b, 31a, 31b diaphragm
32nd, 33 adhesive phase
40 adhesive linkages
50 reflection type polarizers
60 liquid crystal layers
61 substrates
62 liquid crystal cells
70 polarization plates
71 100mm
72 absorb direction of principal axis
73 fixtures
74 power
Claims (6)
1. a kind of polarization plates group, it is that have the 1st polarization plates of the observation side for being configured at liquid crystal cells and be configured at the liquid crystal
The polarization plates group of 2nd polarization plates of the rear side of unit, wherein,
2nd polarization plates have reflection type polarizer,
When the crimp force of the 1st polarization plates is set into C1, the crimp force of the 2nd polarization plates is set to C2, the difference of crimp force
C2-C1 is 0.4~1.0gf.
2. polarization plates group according to claim 1, wherein, the 1st polarization plates and the 2nd polarization plates are respectively provided with and included
The polarizer of polyvinyl alcohol resin film, the thickness of the polarizer is less than 20 μm.
3. polarization plates group according to claim 2, wherein, the thickness for the polarizer that the 1st polarization plates have is 10 μ
More than m, the thickness for the polarizer that the 2nd polarization plates have is less than 10 μm.
4. the polarization plates group according to Claims 2 or 3, wherein, for the 2nd polarization plates, in the polarizer
One side be laminated with diaphragm and be laminated with the reflection type polarizer in another side.
5. polarization plates group according to claim 4, wherein, the moisture permeability of the diaphragm is 500g/ (m224hr) with
Under.
6. a kind of liquid crystal panel, it possesses polarization plates group according to any one of claims 1 to 5 and liquid crystal cells, the liquid
The thickness of brilliant unit is below 0.4mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016036951A JP6323477B2 (en) | 2016-02-29 | 2016-02-29 | Polarizing plate set and LCD panel |
| JP2016-036951 | 2016-02-29 |
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| CN107132688A true CN107132688A (en) | 2017-09-05 |
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| JP (1) | JP6323477B2 (en) |
| KR (1) | KR101969636B1 (en) |
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|---|---|---|---|---|
| CN116018257A (en) * | 2020-09-03 | 2023-04-25 | 日东电工株式会社 | Method for manufacturing polarizing plate with phase difference layer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11312794B2 (en) * | 2016-04-07 | 2022-04-26 | Dai Nippon Printing Co., Ltd. | Protective film, optical film, laminate, polarizing plate, image display device and method for producing polarizing plate |
| JP2018049087A (en) * | 2016-09-20 | 2018-03-29 | 日東電工株式会社 | Liquid crystal panel, liquid crystal display device, and polarizer set |
| JP7290919B2 (en) * | 2018-05-29 | 2023-06-14 | マクセル株式会社 | Information display device |
| JP2022138876A (en) * | 2021-03-11 | 2022-09-26 | 住友化学株式会社 | Polarizing plate |
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| Publication number | Publication date |
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| CN107132688B (en) | 2019-04-23 |
| KR20170101809A (en) | 2017-09-06 |
| TW201736880A (en) | 2017-10-16 |
| JP6323477B2 (en) | 2018-05-16 |
| TWI631376B (en) | 2018-08-01 |
| JP2017156398A (en) | 2017-09-07 |
| KR101969636B1 (en) | 2019-04-16 |
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