CN107132688B - Polarize board group and liquid crystal display panel - Google Patents
Polarize board group and liquid crystal display panel Download PDFInfo
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- CN107132688B CN107132688B CN201710101420.2A CN201710101420A CN107132688B CN 107132688 B CN107132688 B CN 107132688B CN 201710101420 A CN201710101420 A CN 201710101420A CN 107132688 B CN107132688 B CN 107132688B
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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
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
-
- 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
- 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
The present invention provides the polarization board group for being able to suppress liquid crystal display panel warpage under high temperature environment and the polarization board group is fitted in liquid crystal display panel made of liquid crystal cells.The present invention provides a kind of polarization board group, it is the polarization board group of the 1st polarization plates and the 2nd polarization plates of the back 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 as C1, the crimp force of the 2nd polarization plates is set as C2, the difference C2-C1 of crimp force is 0.4~1.0gf.
Description
Technical field
The present invention relates to the polarization board group for being able to suppress liquid crystal display panel warpage under high temperature environment and use the polarization plates
The liquid crystal display panel of group.
Background technique
In recent years, power consumption is low, work under low-voltage, lightweight and slim liquid crystal display are 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, proposes the liquid crystal display of various modes, the liquid crystal display of response speed, contrast, narrow viewing angle etc is just
Gradually it is eliminated.In addition, popularizing with mobile liquid crystal display, for liquid crystal display panel, there are also thin and lightweight requirements.
With the slimming of liquid crystal display panel, there are it is following the problems such as: because fitting in the inclined of liquid crystal cells under high temperature environment
The contraction of vibration plate and make liquid crystal display panel warpage, to can not be accommodated in the shell of final products.
In order to inhibit the warpage of such 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 (back side) of liquid crystal cells, to inhibit liquid crystal
Show the warpage of panel.Such as following methods are described in Japanese Unexamined Patent Publication 2012-58429 bulletin (patent document 1): by making
The thickness of the polarizing coating (described polarizing film in the present invention) of the polarization plates for the observation side configured in liquid crystal cells is thinner than configuration and exists
The polarizing coating of the back side of liquid crystal cells, to inhibit the warpage of liquid crystal display panel.
In addition, proposing following methods in Japanese Unexamined Patent Publication 2013-37115 bulletin (patent document 2): being observed by making
Polarizing coating contained in the optical laminate of side (present invention in described polarizing film) than configuration with observation side opposite side
5 μm of film thickness of polarization or more contained in optical laminate, to inhibit the warpage of liquid crystal display panel.But although these methods can
Effect is played with the liquid crystal cells to thickness big (such as 0.5mm or more and then for 0.7mm or more), but to thin liquid crystal cells
Inhibition warpage effect it is insufficient.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2012-58429 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2013-37115 bulletin
Summary of the invention
Subject to be solved by the invention
The purpose of the present invention is to provide the polarization board group for being able to suppress liquid crystal display panel warpage under high temperature environment and incite somebody to action
The polarization board group fits in liquid crystal display panel made of liquid crystal cells.
Means for solving the problems
[1] a kind of polarization board group 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 board group of 2nd polarization plates of the back 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 as C1, the crimp force of above-mentioned 2nd polarization plates is set as C2, crimp force
Difference C2-C1 be 0.4~1.0gf.
[2] the polarization board group according to [1], wherein above-mentioned 1st polarization plates and above-mentioned 2nd polarization plates all have and include
The polarizing film of polyvinyl alcohol resin film, the thickness of above-mentioned polarizing film are 20 μm or less.
[3] the polarization board group according to [2], wherein polarizing film possessed by above-mentioned 1st polarization plates with a thickness of 10 μm
More than, polarizing film possessed by above-mentioned 2nd polarization plates with a thickness of 10 μm or less.
[4] the polarization board group according to [2] or [3] a, wherein surface layer of above-mentioned 2nd polarization plates in above-mentioned polarizing film
It is laminated with protective film and is laminated with above-mentioned reflection type polarizer in another side.
[5] the polarization board group according to [4], wherein the moisture permeability of said protection film be 500g/ (m224hr) with
Under.
[6] a kind of liquid crystal display panel has polarization board group and liquid crystal cells described in any one of [1]~[5], above-mentioned liquid
Brilliant unit with a thickness of 0.4mm or less.
Invention effect
According to the present invention it is possible to eliminate liquid crystal display panel warpage in a high temperauture environment, it is available in a high temperauture environment
The liquid crystal display panel being accommodated in the shell of final products.
Detailed description of the invention
Fig. 1 is the schematic cross sectional views for the example for indicating that the preferred layer of polarization board group of the invention is constituted.
Fig. 2 is the schematic cross sectional views for the example for indicating that the preferred layer of polarization board group of the invention is constituted.
Fig. 3 is the schematic diagram being illustrated for the definition to crimp force of the invention.
Fig. 4 is the schematic diagram of an example of reflecting polarizer used in the present invention.
Fig. 5 is the schematic cross sectional views for indicating the example of liquid crystal display panel of the invention.
Specific embodiment
Hereinafter, suitably to polarization board group of the invention and the liquid crystal display panel of the polarization board group has been used to say using attached drawing
Bright, still, the present invention is not limited by these embodiments.
Polarization board group of the 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
Back side the 2nd polarization plates 11 constitute.Referring to Fig.1 to the preferred layer structure of the 1st polarization plates 10 and the 2nd polarization plates 11 of the invention
At being illustrated.In Fig. 1, the 1st polarization plates 10 are fitted with protective film 30a, 30b in the two-sided of polarizing film 20 respectively.It is protecting
Film 30a's is also useful with the way of the face formation surface-treated layer of the binding face opposite side of polarizing film 20.2nd polarization plates 11 are excellent
At least one side for being selected in polarizing film 21 has protective film, can also protect as shown in Figure 1 in the two-sided stacking respectively of polarizing film
Cuticula 31a, 31b and across adhesive layer 40 be laminated reflection type polarizer 50.It is also preferable to: it is polarizing as shown in Figure 2
Protective film 31a is laminated in the one side of piece 21, and in another side not across protective film 31b and directly across bonding on polarizing film 21
Reflection type polarizer 50 is laminated in layer 40.These polarization plates fit in liquid crystal cells by adhesive phase 32,33 respectively, form liquid crystal
Panel.
For polarization board group of the invention, in the curling that the crimp force of the 1st polarization plates 10 is set as to C1, the 2nd polarization plates
When power is set as C2, the difference C2-C1 of crimp force is 0.4~1.0gf, preferably 0.5~0.9gf.By with such crimp force it
Difference, so as to inhibit the warpage of liquid crystal display panel when standing liquid crystal display panel 250 hours in the environment of 85 DEG C.Usually and
Speech, thus it is speculated that the warpage for the smaller then liquid crystal display panel of difference of crimp force is smaller, but present inventors have surprisingly found that has above-mentioned model
The warpage of liquid crystal display panel can be effectively reduced when the difference of the crimp force enclosed.
The difference of above-mentioned crimp force in order to obtain, the crimp force C1 of the 1st polarization plates are preferably 0.2~1.0gf, are more preferably
0.2~0.8gf, further 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, further preferably 0.65~1.5gf.
In the present specification, crimp force defines in the following way.As shown in figure 3, firstly, polarization plates are cut into
The square of 100mm square.At this point, each side of polarization plates 70 tilts 45 degree relative to the absorption axis direction 72 of polarization plates 70.It connects
, the heat treatment that the polarization plates 70 that will be cut into stand 5 minutes in the environment of 85 DEG C is carried out, polarization plates 70 are crimped.It will volume
Glass is fixed on using fixing piece 73 in double of side that the diagonal line orthogonal with axis direction 72 is absorbed of polarization plates 70 after song rises
On plate.In general, polarization plates symmetrically crimp, therefore any side can be fixed.In this state to loose inclined
The vertex applied force 74 of vibration plate, the power that polarization plates 70 are in flat state is crimp force.Adhesive tape etc. can be used in fixing piece.Volume
Qu Li for example can use electronics day and claim etc. to be measured.
In turn, it is preferred to use following configuration: the absorption axiss of the 1st polarization plates and the short side direction of liquid crystal cells are substantially parallel,
The absorption axiss of 2nd polarization plates and the longitudinal direction of liquid crystal cells are substantially parallel." substantially parallel " is not limited on stricti jurise
It is parallel, such as polarization plates absorption axiss and liquid crystal cells each side formed by angle be preferably 5 ° or less, more preferably 3 ° or less,
Further preferably 1 ° or less.
It finds to speculate its original by having the crimp force of appropriateness difference that the warpage of liquid crystal display panel is made to become smaller in the present invention
Reason is the shape based on liquid crystal display panel used in smart 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 substantially parallel is configured, and the 2nd polarization plates are so that its absorption axis and the long side of liquid crystal cells are 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 liquid crystal cells long side
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, which is become the 1st polarization plates in the size that the longitudinal direction of liquid crystal cells is integrated, tilts panel
Power, crimp force C2, which is become the 2nd polarization plates in the size that the short side direction of liquid crystal cells is integrated, tilts panel
Power.Think: the difference for the power that the power and the 2nd polarization plates that the 1st polarization plates tilt liquid crystal cells tilt liquid crystal cells is smaller, more can
Inhibit warpage.Therefore can speculate: the actual warpage in order to inhibit liquid crystal display panel, compared with observation side polarization plates, back side
Polarization plates have the case where more major coil power advantageously.But above-mentioned inference is not limited in any way the present invention.
Hereinafter, polarization board group of the invention and the component for constituting liquid crystal display panel are described in detail.In addition, sometimes by
Polarizing film 21 possessed by polarizing film 20 possessed by 1 polarization plates 10 and the 2nd polarization plates 11 is only referred to as polarizing film, will protect sometimes
Cuticula 30a, protective film 30b, protective film 31a and protective film 31b are only referred to as protective film.
[polarizing film]
As polarizing film 20,21, as long as meeting above-mentioned crimp force, any suitable polarizing film can be used.Polarization
Piece generally goes through following process to manufacture: the process being uniaxially stretched to polyvinyl alcohol resin film；By by polyvinyl alcohol
The process that resin film dichroism pigment dyed and made its absorption dichroism pigment；The polyethylene of dichroism pigment will be adsorbed with
The process that alcohol resin film was handled with boric acid aqueous solution and made its crosslinking；And in the crosslinking Treatment using boric acid aqueous solution
The process washed afterwards.
Polyvinyl alcohol resin can be manufactured by the way that polyvinyl acetate system resin to be saponified.Polyvinyl acetate
It is resin other than it can be the homopolymer i.e. polyvinyl acetate of vinyl acetate, it can also be same for vinyl acetate and energy
The copolymer of its other monomers being copolymerized.As can be with the other monomers of vinyl acetate copolymerization, it can be mentioned, for example unsaturated carboxylics
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 of % or more.Poly- second
Enol system resin can be modified, such as also can be used 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 will can be used as the former material film of polarizing film after such polyvinyl alcohol resin film.By polyvinyl alcohol resin film
Method is not particularly limited, and can use well known method to be film-made.The film thickness of polyvinyl alcohol resin former material film is, for example, 10
~100 μm or so, preferably 10~50 μm or so.
The longitudinal direction of polyvinyl alcohol resin film be uniaxially stretched can using dichroism pigment dyeing before, dyeing it is same
When or dyeing after carry out.In the case where carrying out longitudinal be uniaxially stretched after dyeing, which is uniaxially stretched both can be in boron
It carries out, can also be carried out in boric acid processing before acid processing.It is of course also possible to which multiple stages shown in here carry out longitudinal direction
It is uniaxially stretched.Longitudinal direction, which is uniaxially stretched, can use the method being uniaxially stretched between the different roller of peripheral speed, using hot-rolling
The method etc. being uniaxially stretched.In addition, longitudinal be uniaxially stretched can use dry type stretching both to carry out, wet type also can use
It stretches to carry out, wherein dry type stretching is stretched in an atmosphere, and wet tensile makes polyvinyl alcohol resin with water equal solvent
It is stretched in the state of membrane swelling.Stretching ratio is usually 3~8 times or so.
Polyvinyl alcohol resin film for example can be by containing dichroism pigment using the dyeing of dichroism pigment
The method of polyvinyl alcohol resin film is impregnated in aqueous solution to carry out.As dichroism pigment, specifically, can be used 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
The processing for being swollen it.
In the case where using iodine as dichroism pigment, it is typically employed in the aqueous solution containing iodine and potassium iodide 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 100 parts by weight of water, potassium iodide
Content is usually 0.5~20 parts by weight or so relative to 100 parts by weight of water.The temperature of aqueous solution for dyeing is usually 20~
40 DEG C or so.In addition, dip time (dyeing time) in the aqueous solution is usually 20~1,800 seconds or so.
On the other hand, it when using dichroic organic dye as dichroism pigment, is typically employed in comprising water-soluble
Property dichroic organic dye aqueous solution in impregnate 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 100 parts by weight of water-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, dip time (dyeing time) in the aqueous solution is logical
It is often 10~1,800 seconds or so.
Boric acid processing after being dyed using dichroism pigment can be by containing the polyvinyl alcohol resin film after dyeing
The method impregnated in the aqueous solution of boric acid carries out.The content of boric acid in boracic aqueous acid is logical relative to 100 parts by weight of water
It is often 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
Aqueous solution preferably comprise potassium iodide.The content of potassium iodide in boracic aqueous acid is usually 0.1 relative to 100 parts by weight of water
~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, further preferably 200~400 seconds.The temperature of the aqueous solution of boronic acid containing is usually 50 DEG C
It above, is preferably 50~85 DEG C, more preferably 60~80 DEG C.
Washing process usually is carried out to boric acid treated polyvinyl alcohol resin film.Washing process for example can use by
It is carried out through boric acid treated the method for polyvinyl alcohol resin film immersion in water.The temperature of water in washing process is usual
It is 5~40 DEG C or so.In addition, dip time is usually 1~120 second or so.
Implement to be dried after washing, obtains polarizing film.Air drier can be used in drying process or far infrared adds
Hot device carries out.The temperature of drying process is usually 30~100 DEG C or so, preferably 50~80 DEG C.The time of drying process is usual
It is 60~600 seconds or so, preferably 120~600 seconds.The moisture content of polarizing film is reduced to practical level by being dried.
The moisture content is usually 5~20 weight % or so, preferably 8~15 weight %.If moisture content is lower than 5 weight %, can lose
Damage or fracture occur after the drying sometimes for the flexibility of polarizing film.In addition, it is steady to there is heat if moisture content is more than 20 weight %
Qualitative insufficient tendency.
The polarizing film that the gas absorption quantity on polyvinyl alcohol resin film has dichroism pigment can be manufactured in the above manner.
In addition, the stretching of the polyvinyl alcohol resin film in the manufacturing process of polarizing film, dyeing, boric acid processing, washing work
Sequence, drying process can for example be carried out according to the method recorded in Japanese Unexamined Patent Publication 2012-159778.It is recorded in the document
In method, the polyvinyl alcohol resin layer that polarizing film is formed 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 to the scope of the present invention, the 1st polarization plates and the 2nd polarization plates are had
The thickness of polarizing film be both preferably 20 μm or less, more preferably less than 15 μm.Further preferably make possessed by the 1st polarization plates partially
Shake piece with a thickness of polarizing film possessed by 10 μm or more, the 2nd polarization plates with a thickness of 10 μm or less.It is good that can assign
The aspect of optical characteristics, the thickness of polarizing film are usually 3 μm or more.The crimp force of polarization plates is also inclined by polarizing film and reflection-type
The influence that the piece that shakes is shunk, therefore by making the thickness of polarizing film be 20 μm hereinafter, further to inclined possessed by the 1st polarization plates
The thickness of polarizing film possessed by the thickness of vibration piece and the 2nd polarization plates sets defined thickness difference, to be easily adjusted crimp force
Difference.
[protective film]
As protective film 30a, 30b, 31a, 31b, the protective film formed by transparent resin appropriate can be used.It is specific and
Speech is, it is preferable to use the protective film comprising excellent polymer such as the transparency, uniform optical characteristics, mechanical strength, thermal stability.
It as such transparent resin film, can be used for example: the celluloses 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 mesenteries such as methyl acrylate and poly- (methyl) ethyl acrylate；Polycarbonate mesentery；Polyether sulfone mesentery；Polysulfones system
Film；Polyimides mesentery；Polyolefin mesentery；Polynorbornene mesentery etc..But it is not limited by these transparent resin films.
Protective film 31a, 31b suitable for protective film 30a, 30b of the 1st polarization plates 10 and suitable for the 2nd polarization plates 11 can
To be each independently identical protective film, or different protective films.
In terms of the difference for being easily adjusted crimp force, protective film 30a and 30b suitable for 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%
(m2For 24 hours r) below, more preferably 500g/ (m2For 24 hours r) below.Moisture permeability refers to the cup according to specified in JIS Z 0208
The value of method measurement.In order to make the difference equal extent of moisture permeability, for example, protective film 30a and 30b using same material material,
Or protective film using the material of the small material of moisture permeability and another protective film using the big material of moisture permeability material
When, the method that surface-treated layer (preferably hard conating) is set on the big protective film of the moisture permeability can be enumerated.
On the other hand, different suitable for both the preferred moisture permeability of the protective film 31a and 31b of the 2nd polarization plates 11, moisture permeability it
The size of difference is preferably 750g/ (m under conditions of 40 DEG C of temperature, relative humidity 90%2For 24 hours r) more than, more preferably
1000g/(m2For 24 hours r) more than.For example, the material by using unlike material in protective film 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 unilateral side of polarizing film to omit the protective film 31b of the 2nd polarization plates
The composition of film, at this point, the moisture permeability of protective film 31a is preferably 500g/ (m2For 24 hours r) below, more preferably 250g/ (m2·
For 24 hours r) below.
Above-mentioned protective film can implement saponification process, sided corona treatment, bottom to its binding face before fitting to polarizing film
The easily bonding processing such as painting processing, anchoring coating process.The thickness of protective film is usually 5~200 μm or so of range, preferably 10
μm or more, and preferably 80 μm or less, more preferably 40 μm or less, particularly preferably 35 μm or less.
In addition, can be arranged in the outer surface of protective film 30a to assign required surface optical characteristics or other features
Coating (surface-treated layer).The concrete example of coating layer includes hard conating, antiglare layer, anti-reflection layer, antistatic layer, stain-proofing layer.Shape
It is not particularly limited at the method for coating layer, well known method can be used.
In the case where liquid crystal cells are transverse electric field (IPS:In-Plane Switching) mode, since this will not be damaged
The wide viewing angle characteristic of IPS mode liquid crystal cell inherently, therefore the phase of the thickness direction of protective film 30b and protective film 3lb
Difference Rth is preferably the range of -10~10nm.In addition, the phase difference value Re in face is preferably also the range of -10~10nm.
The phase difference value Rth of thickness direction is that mean refractive index in face subtracts the resulting value of refractive index of thickness direction and multiplies
It is worth obtained by thickness with film, by following formula (a) Lai Dingyi.In addition, the phase difference value Re in face is that refringence in face multiplies
It is worth obtained by thickness with film, by following formula (b) Lai Dingyi.
Rth=((nx+ny)/2-nz) × d (a)
Re=(nx-ny) × d (b)
In formula, nx is the refractive index of the x-axis direction (slow-axis direction in face) in film surface, and ny is the y-axis direction (face in film surface
Interior fast axis 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 of visible light or so
Under value, but in the present specification using the phase difference value under wavelength 590nm as standard.The phase difference value Rth of thickness direction
And commercially available various phasometers can be used to measure in the phase difference value Re in face.
As being the method in the range of -10~10nm by the phase difference value Rth control of the thickness direction of protective film, can arrange
Lift when make film that reduction remains in face and the method for the strain of thickness direction as much as possible.For example, in above-mentioned solvent cast
In method, it can use in the face generated when making using heat treatment and dry the cast resin solution and the contraction of the residual of thickness direction is answered
The method etc. become slack.It on the other hand, can be using following methods etc.: resin film in order to prevent in above-mentioned extrusion by melting
It squeezes out from die head and is stretched during up to cooling, and shorten the distance from die head to chilling roll as much as possible, and
The rotation speed of extrusion output and chilling roll is controlled in a manner of not making film be stretched.Alternatively, it is also possible to same with solvent casting method
Use the method for making to remain on the strain relaxation of resulting film using heat treatment to sample.
[reflection type polarizer 50]
2nd polarization plates 11 of the invention have reflection type polarizer 50.Fig. 4 is reflection type polarizer used in the present invention
An example schematic cross sectional views.Reflection type polarizer 50 be make to have the layer A of birefringence with do not have substantially it is birefringent
Multi-layer laminate obtained by the layer B of property is alternately laminated.For example, the refractive index nx of A layers of x-axis direction is greater than y-axis in illustrated example
The refractive index nx of ny, B layers of refractive index of the x-axis direction in direction and the refractive index ny in y-axis direction are substantially identical.Therefore, A layers and B
The refringence of layer is larger in x-axis direction, is substantially zero in y-axis direction.As a result: x-axis direction becomes 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 of polarizing film is corresponding.
Above-mentioned A layers is preferably made of the material for showing birefringence by stretching.As the typical example of such material,
Naphthalenedicarboxylic acid polyester (such as polyethylene naphthalate), polycarbonate and acrylic resin (such as poly- methyl can be enumerated
Methyl acrylate).It is preferred that polyethylene naphthalate.Above-mentioned B layers carrying out and stretching substantially preferably by not showing
The material of birefringence is constituted.As the typical example of such material, the copolyesters of naphthalenedicarboxylic acid and terephthalic acid (TPA) can be enumerated.
Reflection type polarizer transmits the light (such as p wave) with the 1st polarization direction with B layers of interface at A layers, makes to have
The light (such as s wave) of 2nd polarization direction orthogonal with the 1st polarization direction reflects.The light of reflection is one on the A layers of interface with B layers
Part is transmitted as the light with the polarization direction l, and a part is reflected as the light with the 2nd polarization direction.It is reflecting
The inside of type polarizing film is repeated a number of times reflection and transmission as described above, the utilization efficiency of light thus can be improved.
Reflection type polarizer 50 preferably comprises reflecting layer R as the outermost layer with 21 opposite side of polarizing film.It is anti-by being arranged
A layer R is penetrated, the outermost light of reflection type polarizer can be further back to using finally unutilized, therefore can be further
Improve the utilization efficiency of light.
It is representative to be for the R of reflecting layer, reflection function is shown by the multilayered structure of polyester resin layer.
The integral thickness of reflection type polarizer can the total number etc. of the layer according to contained by purpose, reflection type polarizer and it is appropriate
Ground setting.From the viewpoint of change in size when inhibiting hot environment, the integral thickness of reflection type polarizer is preferably 15 μm
~50 μm, more preferably 30 μm or less.
As reflection type polarizer, such as the reflective polarizing recorded in Japanese Kohyo 9-507308 bulletin 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 stretch) again
It uses.As commercially available product, it can be mentioned, for example trade names DBEF, APF of 3M corporation.
[polarizing film is bonded with protective film]
Being bonded of polarizing film and protective film can use bonding agent or adhesive is bonded.By polarizing film and protective film into
The thickness of the adhesive phase of row fitting can be 0.01~30 μm or so, preferably 0.01~10 μm, more preferably 0.05~5 μ
m.If adhesive phase with a thickness of the range, will not be generated between the protective film and polarizing film being laminated and float, remove, obtained
To the bonding force of no problem in practical.The thickness for the adhesive phase that polarizing film and protective film are bonded can be 5~50 μ
M or so, preferably 5~30 μm, more preferably 10~25 μm.
When polarizing film is Nian Jie with protective film, polarizing film, protective film are carried out in advance saponification process, sided corona treatment, etc. from
Daughter processing etc. is also useful.
(bonding agent)
Suitable according to type, the purpose of adherend bonding agent appropriate can be used when forming adhesive phase, in addition,
Also it can according to need using anchor coating agent.As bonding agent, it can be mentioned, for example solvent type adhesives, emulsion-type adhesive, pressure-sensitive
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 ingredient can be enumerated and be dissolved or dispersed in the viscous of water
Connect agent.If enumerating the example that can be dissolved in the bonding agent ingredient of water, there is polyvinyl alcohol resin.In addition, can if enumerating
The example for the bonding agent ingredient being dispersed in water then has the polyurethane series resin with hydrophilic radical.Water system bonding agent can incite somebody to action
Such bonding agent ingredient mixes in water to prepare together with the additive of the addition cooperated as needed.If enumerating can become
The example of the commercially available polyvinyl alcohol resin of water system bonding agent, the conduct that Ze You Kuraray Co., Ltd. sells are carboxy-modified poly-
" KL-318 " of vinyl alcohol etc..
Water system bonding agent can according to need containing crosslinking agent.If enumerating the example of crosslinking agent, there are amine compounds, hydroformylation
Close object, methylol compound, water-soluble epoxy resin, isocyanate compound, multivalent metal salt etc..With polyethenol series tree
In the case that rouge is as bonding agent ingredient, it is preferable to use using glyoxal as represent aldehyde compound, with 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 the poly- alkylene for making diethylenetriamines, trien etc
Quito amine and reaction product, that is, polyamide polyamines of the dicarboxylic acids of adipic acid etc, reacted with epichlorohydrin obtained from polyamide ring
Oxygen resin.If enumerating the example of the commercially available product of water-soluble epoxy resin, have from Taoka Chemical Industries Co. Ltd.'s sale
" Sumirez Resin (registered trademark) 650 (30) " etc..
It is coated with water system bonding agent in the bonding plane of polarizing film and/or the protective film for fitting in the polarizing film, the two is bonded
Afterwards, implement to be dried, it is hereby achieved that polarization plates.Before bonding, at protective film implementation saponification process, corona discharge
The easy bonding processing of reason, corona treatment or primary coat processing etc is next preparatory, and to improve wetability also effective.Drying temperature is for example
It can be 50~100 DEG C or so.In terms of further increasing bonding force, in the temperature of slightly above room temperature preferably after drying process
Temperature maintenance 1~10 day or so of such as 30~50 DEG C or so of degree.
As another preferred bonding agent, the irradiation or heating using active energy beam can be enumerated and cured curability
Adhesive composite.As curability adhesive composite, it can be mentioned, for example the free radicals comprising acrylic compounds etc
The curability adhesive composite of polymerizable compound, cationically polymerizable compound comprising epoxy compound etc are consolidated
The property changed adhesive composite.These compositions preferably contain radical polymerization initiator or cationic polymerization initiators respectively.
In turn, curability adhesive composite can contain other additives, example under the premise of not damaging its cementability
Such as ion trap agent, antioxidant, chain-transferring agent, sensitizer, tackifier, thermoplastic resin, filler, flow modifier, increasing
Mould agent, defoaming agent 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. can be enumerated such as hindered phenolic antioxidant as antioxidant.
In the bonding plane of bonding plane or the two by curability adhesive composite coated on polarizing film or protective film
Afterwards, it is bonded with the face coated with bonding agent, and uncured bonding is made by irradiation active energy beam or heating
Oxidant layer solidification, so as to so that polarizing film is Nian Jie with protective film.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, which substantially can be used as the substantially no-solvent type bonding agent not comprising solvent, to be come
It uses, since there are respective optimum viscosity ranges in each application pattern, in order to adjust viscosity, it can be made to contain molten
Agent.Solvent does not reduce the optical property of polarizing film preferably and will dissolve well by each ingredient of representative of epoxide
Organic solvent, can be used such as using toluene as representative hydro carbons, using ethyl acetate as the esters of representative.
In cured situation of the irradiation using active energy beam to carry out adhesive composite, before can be used
The various active energy beams described, still, from easy to operate and be also easy to control the aspect of irradiate light quantity etc., preferably
Use ultraviolet light.Active energy beam such as ultraviolet irradiation intensity, exposure can be to the degree of polarization of polarizing film
It the various optical properties that represent and is not caused using the transparency of protective film, phase difference characteristics as the various optical properties of representative
It is suitably determined in a manner of ensuring appropriate productivity 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 adhesive is formed
The adhesive of layer, preferably comprises the adhesive (acrylic adhesive) of acrylic resin.
Acrylic resin contained in acrylic adhesive is with butyl acrylate, ethyl acrylate, acrylic acid
Resin of the alkyl acrylate of different monooctyl ester and acrylic acid-2-ethyl caproite etc as principal monomer.In the acrylic acid series tree
Polarized monomer is usually copolymerized in rouge.Polar monomer is the compound with polyunsaturated bond and polar functional group, here,
Polyunsaturated bond is usually from (methyl) acryloyl group, in addition, polar functional group can be carboxyl, hydroxyl, amide groups, ammonia
Base, epoxy group 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 usually combined with together with acrylic resin in acrylic adhesive.
As the typical example of crosslinking agent, isocyanic acid in the molecule at least two isocyanate base (- NCO) can be enumerated
Ester compounds.
Various additives can further be cooperated in adhesive.As suitable additive, can enumerate silane coupling agent,
Antistatic agent etc..Silane coupling agent is effective in terms of improving the bonding force with glass.Antistatic agent is reducing or preventing electrostatic
The aspect of generation is effective.
Adhesive phase can be formed by the following method: being prepared adhesive ingredients as described above and be dissolved in organic solvent
Made of adhesive composition, be directly coated on polarizing film or on protective film, re-dry remove solvent method；Or
Person is coated with above-mentioned adhesive composition in the demoulding process face of the base material film comprising resin film for implementing demoulding processing,
Solvent is dried and removed, 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 where forming adhesive phase on transparent protective film, it is common practice to: be bonded on its surface
The resin film (also referred to as isolation film) for implementing demoulding processing temporarily pastes adhesive layer surface until when using
Protection.From the viewpoint grade of the operability of the adhesive composition as organic solvent solution, the transfer of the latter is mostly used greatly
Method, at this point, be used primarily for being formed adhesive phase by the base material film of demoulding processing after fitting in polarization plates can directly at
For isolation film, from this side considerations, the case where being also advantageous that.
Before adhesive phase is laminated on polarizing film, protective film, protection film surface unilateral to polarization and adhesive face are pre- advanced
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 reflection type polarizer 50 to be laminated
Bonding agent or adhesive can be used in adhesive layer, it is preferable to use adhesives for the fitting of any one.As long as adhesive phase light
The excellent adhesive phase of transparency adhesion characteristic that is excellent and including appropriate wetability, coherency, cementability etc. is learned, but
It is preferred that the also excellent adhesive phase such as durability.Specifically, preferably comprising acrylic acid as the adhesive for forming adhesive phase
It is the adhesive (acrylic adhesive) of resin.
As adhesive phase, can be used and the adhesive phase used in being bonded of above-mentioned polarizing film and protective film
Same adhesive phase.Respectively different adhesives can be used in adhesive, and same adhesive also can be used.
Before adhesive phase is laminated on polarization plates, unilateral to polarization in advance, protection film surface and adhesive face carry out corona
The way of processing, corona treatment etc. is also useful.In addition, when reflection type polarizer is laminated, 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 reflection-type to be laminated
The adhesive phase of vibration piece 50 is preferably 25 μm or less.More preferably 15 μm or less.In general, adhesive phase with a thickness of 3 μm or more.
[liquid crystal cells, liquid crystal display panel]
The liquid crystal layer that liquid crystal cells have 2 blade unit substrates and are held between the two substrates.Unit substrate is usually more
It is made of glass, however, it is possible to for plastic base.In addition, liquid crystal cells used in liquid crystal display panel of the invention itself
It can be by various liquid crystal cells (such as the IPS mode as drive mode, VA mode, TN mode etc. for being used in the field
Etc well known mode) constitute.Recently, the thickness of liquid crystal cells is thinning, and rigidity dies down, thus when liquid crystal display panel is made
It is very easy to generate warpage.Therefore, can reduce the warpage of liquid crystal display panel previous polarization board group can it is big to thickness (such as
0.5mm or more) liquid crystal cells play effect, but in the case where being applied to slim liquid crystal cells, can also sometimes
Liquid crystal display panel is set to generate warpage.However, polarization board group according to the present invention, though the liquid crystal cells with a thickness of 0.4mm or less,
It and then is 0.3mm hereinafter, warpage can also be reduced significantly.In the present invention, the thickness of liquid crystal cells includes liquid crystal layer and folder
Hold the thickness of a pair of of substrate of liquid crystal layer.
As shown in figure 5, by the way that polarization board group of the invention is fitted in liquid crystal cells across adhesive phase, so as to make
Make liquid crystal display panel.
From another viewpoint, the exhausted value of the amount of warpage of liquid crystal display panel of the invention when heating 250 hours for 85 DEG C is
0.5mm or less, preferably 0.3mm or less.By the way that polarization board group of the invention is fitted in liquid crystal cells, thus liquid of the invention
Warpage is inhibited crystal panel in a high temperauture environment, becomes the one-piece type liquid crystal of front panel in the shell for being accommodated in final product
Display panel.
From can make the more significant aspect of effect of the present invention, polarization plates are preferably shaped to have long side and short side
Rectangular shape.In the case where polarization plates of the invention are the rectangular shape with long side and short side, the length and short side of 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 of long side
Degree is preferably 50mm or more, more preferably 150mm or more, in addition, the length of its short side is preferably 40mm or more, is more preferably
80mm or more.Specifically, the size of polarization plates of the invention is for example preferably 2.7 types (55mm × 41mm) or more and excellent
It is selected as 11.3 types (174mm × 231mm) below.
[embodiment]
Hereinafter, enumerating embodiment further illustrates the present invention, but the present invention is not limited by these examples.In example,
" part " and " % " for indicating content or usage amount is then weight basis unless otherwise specified.It is explained, example below
In the measurement of each physical property carry out in accordance with the following methods.
(1) measurement of thickness:
It is determined using the digital micrometer " MH-15M " of Nikon Corp.
(2) measurement of crimp force
As shown in figure 3, firstly, polarization plates to be cut into the square of 100mm square, at this point, each side of polarization plates is opposite
45 degree are tilted in the absorption axis direction of polarization plates.Then, the polarization plates that will be cut into are carried out and stand 5 minutes in the environment of 85 DEG C
Heat treatment, make polarization plates 70 crimp.Double one that the diagonal line orthogonal with axis direction is absorbed of polarization plates after curling is risen
Side is fixed on glass plate using adhesive tape.Apply the pressing to electronics Libra to the vertex of loose polarization plates in this state
The power for making polarization plates be in flat state is set as crimp force by power.
(3) measurement of the amount of warpage of liquid crystal display panel
Made liquid crystal display panel amount of warpage in a high temperauture environment is measured in accordance with the following methods.Firstly, by made
After liquid crystal display panel stands 250 hours in the environment of 85 DEG C, so that the 1st polarization plates is become upside and be placed in Nikon Corp
On the measurement platform of the two-dimentional analyzer " NEXIV VMR-12072 " of system.Then, make focal point in the surface of measurement platform, with it
On the basis of, make focal point in 4 corners, each center on 4 sides and the center of liquid crystal panel surface of liquid crystal display panel, measures and make
On the basis of focus distance after, by with measurement platform at a distance from using in terms of absolute value longest distance, will be in liquid crystal as amount of warpage
The warpage that the depths of the observation side panel of panel tilts is set as positive warpage, and the warpage that the depths of overleaf side panel tilts is set as
Negative warpage.Result is summarized in table 1.
(4) the moisture permeability measurement of protective film
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 the following way.By 30 μm of thickness of polyvinyl alcohol film, (average degree of polymerization is about
2400,99.9 moles of % or more of saponification degree) about 5 times are longitudinally uniaxially stretched to using dry type stretching, then in the case where keeping tense situation
After being impregnated 1 minute in 60 DEG C of pure water, in 28 DEG C of the aqueous solution that iodine/potassium iodide/water weight ratio is 0.05/5/100
Dipping 60 seconds.Then, it is impregnated 300 seconds in 72 DEG C of the aqueous solution that potassium iodide/boric acid/water weight ratio is 8.5/8.5/100.
Next, being dried after cleaning 20 seconds with 26 DEG C of pure water at 65 DEG C, obtaining the gas absorption quantity on polyvinyl alcohol film has
12 μm of thickness of polarizing film of iodine.
Then, it in the two sides of the polarizing film, is coated on the carboxy-modified polyvinyl alcohol (" KL- of Kuraray Co., Ltd.
318 ") 3 parts by weight are dissolved in 100 parts by weight of water and are prepared into the aqueous solution of polyvinyl alcohol water solution relative to 100 weight of water
Amount part is that the ratio of 1.5 parts by weight is mixed with water soluble polyamide the epoxy resin (" Sumirez of Sumitomo Chemical Co
Resin (registered trademark) 650 (30) ", 30 weight % of solid component concentration) obtained by water system bonding agent, fitting be used as protective film
Be laminated on 25 μm of thickness of tri acetyl cellulose film (trade name " KC2UA " of Konica Minolta Co. Ltd. system)
There are the film of 7 μm of thickness of acrylic acid series hard conating and 23 μm of the thickness being not stretched of norbornene mesentery (Japanese ZEON plants of formula
The trade name " ZEONOR (registered trademark) " of commercial firm).Polarization plates are 5 minutes dry at 80 DEG C, it is conserved 168 hours at 40 DEG C.
Later, it is bonded the adhesive (trade name " #KT " of LINTEC Co. Ltd. system) of 20 μ m-thicks in norbornene mesentery side, is seen
Examine lateral deviation vibration plate.
Under conditions of 40 DEG C of temperature, relative humidity 90%, acrylic acid is laminated on above-mentioned tri acetyl cellulose film
The moisture permeability for being the film of hard conating is 450g/ (m2For 24 hours r), the moisture permeability of above-mentioned norbornene mesentery is 6g/ (m2·24hr)。
The difference of moisture permeability is 444g/ (m2·24hr)。
Back side polarization plates make in the following way.By 20 μm of thickness of polyvinyl alcohol film, (average degree of polymerization is about
2400,99.9 moles of % or more of saponification degree) about 5 times are longitudinally uniaxially stretched to using dry type stretching, then in the case where keeping tense situation
After being impregnated 1 minute in 60 DEG C of pure water, in 28 DEG C of the aqueous solution that iodine/potassium iodide/water weight ratio is 0.05/5/100
Dipping 60 seconds.Then, it is impregnated 300 seconds in 72 DEG C of the aqueous solution that potassium iodide/boric acid/water weight ratio is 8.5/8.5/100.
Next, being dried after cleaning 20 seconds with 26 DEG C of pure water at 65 DEG C, obtaining the gas absorption quantity on polyvinyl alcohol film has
7 μm of thickness of polarizing film of iodine.
Above-mentioned water system bonding agent is coated on to the single side of polarizing film, is bonded 13 μm of thickness of the norbornene as protective film
Mesentery (phase difference value Re in the face under the trade name " ZEONOR (registered trademark) " of Japanese ZEON Co. Ltd. system, wavelength 590nm
=0.8nm).Keep polarization plates 5 minutes dry at 80 DEG C, is conserved 168 hours at 40 DEG C.5 μ m-thicks are bonded in the another side of polarizing film
Adhesive (trade name " #L2 " of LINTEC Co. Ltd. system), and be bonded the brightness enhancement film (commodity of 3M of 26 μ m-thicks on it
Name " Advanced Polarized Film, Version 3).Later, the adhesive of 20 μ m-thicks is bonded in norbornene mesentery side
(trade name " #KT " of LINTEC Co. Ltd. system), obtains back side polarization plates.In the item of 40 DEG C of temperature, relative humidity 90%
Under part, the moisture permeability of above-mentioned norbornene mesentery is 30g/ (m2·24hr)。
[embodiment 2]
Observation side polarization plates make in the following way.12 μm of thickness of polarizing film is made similarly to Example 1, and
In the water system bonding agent that its double spread embodiment 1 is recorded, in thickness 25 μm of triacetyl of the one side fitting as protective film
Cellulose membrane (trade name " KC2UA " of Konica Minolta Opto Co. Ltd. system) and 20 μm of thickness of triacetyl are fine
Tie up plain film (phase difference in the face under the trade name " KC2CTW " of Konica Minolta Opto Co. Ltd. system, wavelength 590nm
Value R0=1.2nm, thickness direction phase difference value Rth=1.3nm).Keep polarization plates 5 minutes dry at 80 DEG C, conserves 168 at 40 DEG C
Hour.Later, 20 μm of thickness tri acetyl cellulose film side be bonded 20 μ m-thicks adhesive (LINTEC Co. Ltd. system
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 25 μm of above-mentioned thickness
Degree is 1200g/ (m2For 24 hours r), the moisture permeability of the tri acetyl cellulose film of 20 μm of above-mentioned thickness is 1660g/ (m2·24hr)。
The difference of moisture permeability is 460g/ (m2·24hr)。
The back side polarization plates overleaf used in lateral deviation vibration plate using embodiment 1.
[embodiment 3]
Observation side polarization plates make in the following way.7 μm of thickness of polarizing film is made similarly to Example 1, and
In the water system bonding agent that its double spread embodiment 1 is recorded, in triacetyl of the one side fitting as protective film at 25 μm of thickness
7 μm of thickness of propylene is laminated on base cellulose membrane (trade name " KC2UA " of Konica Minolta Opto Co. Ltd. system)
The film of acid system hard conating and 20 μm of thickness of the tri acetyl cellulose film (quotient of Konica Minolta Opto Co. Ltd. system
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 5 minutes dry at 80 DEG C, conserve 168 hours at 40 DEG C.Later, it is pasted 20 μm of thickness of tri acetyl cellulose film side
The adhesive (trade name " #KT " of LINTEC Co. Ltd. system) for closing 20 μ m-thicks, obtains 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 25 μm of above-mentioned thickness
Degree is 1200g/ (m2For 24 hours r), the moisture permeability of the tri acetyl cellulose film of 20 μm of above-mentioned thickness is 1660g/ (m2·24hr)。
The difference of moisture permeability is 460g/ (m2·24hr)。
The back 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.
Back side polarization plates make in the following way.12 μm of thickness of polarizing film is made similarly to Example 1, and
In the water system bonding agent that its double spread embodiment 1 is recorded, in thickness 25 μm of triacetyl of the one side fitting as protective film
Cellulose membrane (trade name " KC2UA " of Konica Minolta Opto Co. Ltd. system) and be not stretched 15 μm of thickness
Norbornene mesentery (phase difference value in the face under the trade name " ARTON (registered trademark) " of JSR Corp., wavelength 590nm
R0=0nm, thickness direction phase difference value Rth=0nm).Keep polarization plates 5 minutes dry at 80 DEG C, is conserved 168 hours at 40 DEG C.?
Tri acetyl cellulose film side is bonded the adhesive (trade name " #L2 " of LINTEC Co. Ltd. system) of 5 μ m-thicks, and pastes on it
Close the brightness enhancement film (trade name of 3M " Advanced Polarized Film, Version 3) of 26 μ m-thicks.Later, in drop ice
Piece alkene mesentery side is bonded the adhesive (trade name " #KT " of LINTEC Co. Ltd. system) of 20 μ m-thicks, obtains back 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/
(m2For 24 hours r), the moisture permeability of above-mentioned norbornene 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 back side polarization plates make in the following way.Firstly, using dry type stretching by 60 μm of thickness
Polyvinyl alcohol film (99.9 moles of average degree of polymerization about 2,400, saponification degree % or more) is uniaxially stretched to about 5 times, then is keeping tight
After being impregnated 1 minute in 60 DEG C of pure water under the state of opening, in 28 DEG C that iodine/potassium iodide/water weight ratio is 0.05/5/100
It is impregnated 60 seconds in aqueous solution.Then, it is soaked in 72 DEG C of the aqueous solution that potassium iodide/boric acid/water weight ratio is 8.5/8.5/100
Stain 300 seconds.Next, in 65 DEG C of dryings, obtaining the gas absorption quantity on polyvinyl alcohol film with after pure water 20 seconds of 26 DEG C
There is 23 μm of thickness of polarizing film of iodine.
Then, the water system bonding agent recorded in the double spread embodiment 1 of above-mentioned 23 μm of polarizing film, fitting is as protection
40 μm of thickness of the tri acetyl cellulose film (trade name " KC4UY " of Konica Minolta Opto Co. Ltd. system) of film
With 23 μm of thickness of the norbornene mesentery (trade name " ZEONOR (registrar of Japanese ZEON Co. Ltd. system being not stretched
Mark) ").Keep polarization plates 5 minutes dry at 80 DEG C, is conserved 168 hours at 40 DEG C.5 μ m-thicks are bonded in tri acetyl cellulose film side
Adhesive (trade name " #L2 " of LINTEC Co. Ltd. system), and be bonded the brightness enhancement film (commodity of 3M of 26 μ m-thicks on it
Name " Advanced Polarized Film, Version 3).Later, the adhesive of 20 μ m-thicks is bonded in norbornene mesentery side
(trade name " #KT " of LINTEC Co. Ltd. system), obtains back 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/
(m2For 24 hours r), the moisture permeability of above-mentioned norbornene 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 back side polarization plates overleaf used in lateral deviation vibration plate using comparative example 1.
[production of liquid crystal display panel]
Using the polarization board group made in above-described embodiment 1~3 and comparative example 1~3, liquid crystal surface is made in the following way
Plate.Firstly, observation side polarization plates are cut diagonally 7 inches in the mode for keeping absorption axiss parallel relative to the short side of liquid crystal cells
Back side polarization plates are cut diagonally 7 inches of rulers in the mode for keeping absorption axiss parallel relative to the long side of liquid crystal cells by size
It is very little.Then, by adhesive phase by a pair of 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 fits on liquid crystal cells.Used liquid crystal cells with a thickness of 0.4mm.
It is above that the results are 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 availability
According to the present invention it is possible to eliminate liquid crystal display panel warpage in a high temperauture environment, and available in hot environment
Under the shell for being accommodated in final products liquid crystal display panel, therefore be useful.
Symbol description
10 the 1st polarization plates, 11 the 2nd polarization plates
20,21 polarizing film
30a, 30b, 31a, 31b protective film
32,33 adhesive phase
40 adhesive layers
50 reflection type polarizers
60 liquid crystal layers
61 substrates
62 liquid crystal cells
70 polarization plates
71 100mm
72 absorb axis direction
73 fixing pieces
74 power
Claims (4)
1. a kind of polarization board group 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 board group of 2nd polarization plates of the back side of unit, wherein
1st polarization plates and the 2nd polarization plates all have the polarizing film comprising polyvinyl alcohol resin film,
2nd polarization plates have reflection type polarizer,
When the crimp force of the 1st polarization plates is set as C1, the crimp force of the 2nd polarization plates is set as C2, the difference of crimp force
C2-C1 is 0.4~1.0gf,
Each side is quiet in the environment of 85 DEG C relative to the square polarization plates for absorbing the 100mm square that axis direction tilts 45 degree
It sets after five minutes, the fixed half from the diagonal line orthogonal with axis direction is absorbed of the polarization plates, to the loose of the polarization plates
Vertex applied force, the power which reaches flat state is the crimp force,
Polarizing film possessed by 1st polarization plates with a thickness of 10 μm more than and less than 15 μm, the 2nd polarization plates are had
Polarizing film with a thickness of 10 μm hereinafter,
It is 500g/ (m in the moisture permeability that is laminated on one side of the polarizing film for the 2nd polarization plates2For 24 hours r) below
Protective film, and be laminated with the reflection type polarizer across adhesive layer in another side,
1st polarization plates and the 2nd polarization plates are the rectangular shape with long side and short side,
The absorption axiss and short side direction of 1st polarization plates are substantially parallel, and the absorption axiss and long side of the 2nd polarization plates are substantially flat
Row.
2. polarization board group according to claim 1, wherein
1st polarization plates have protective film on the two sides of the polarizing film,
The size of the difference of the moisture permeability of the protective film is 750g/ (m under conditions of 40 DEG C of temperature, relative humidity 90%2·24hr)
Below.
3. polarization board group according to claim 1 or 2, wherein
For the size of polarization plates, the length of long side is 150mm or more, and the length of short side is 80mm or more.
4. a kind of liquid crystal display panel has polarization board group according to any one of claims 1 to 3 and liquid crystal cells, the liquid
Brilliant unit with a thickness of 0.4mm or less.
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|---|---|---|---|
| JP2016-036951 | 2016-02-29 | ||
| JP2016036951A JP6323477B2 (en) | 2016-02-29 | 2016-02-29 | Polarizing plate set and LCD panel |
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| CN107132688A CN107132688A (en) | 2017-09-05 |
| CN107132688B true CN107132688B (en) | 2019-04-23 |
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| JP (1) | JP6323477B2 (en) |
| KR (1) | KR101969636B1 (en) |
| CN (1) | CN107132688B (en) |
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| TWI835262B (en) * | 2016-04-07 | 2024-03-11 | 日商大日本印刷股份有限公司 | Optical film, laminate, polarizing plate, image display device and method for manufacturing 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 |
| JP2022042662A (en) * | 2020-09-03 | 2022-03-15 | 日東電工株式会社 | Manufacturing method of polarizing plate having phase difference layer |
| 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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| JP6323477B2 (en) | 2018-05-16 |
| TW201736880A (en) | 2017-10-16 |
| TWI631376B (en) | 2018-08-01 |
| KR20170101809A (en) | 2017-09-06 |
| JP2017156398A (en) | 2017-09-07 |
| KR101969636B1 (en) | 2019-04-16 |
| CN107132688A (en) | 2017-09-05 |
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