CN107844002A - Liquid crystal panel, liquid crystal display device and polarisation part group - Google Patents

Liquid crystal panel, liquid crystal display device and polarisation part group Download PDF

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Publication number
CN107844002A
CN107844002A CN201710851697.7A CN201710851697A CN107844002A CN 107844002 A CN107844002 A CN 107844002A CN 201710851697 A CN201710851697 A CN 201710851697A CN 107844002 A CN107844002 A CN 107844002A
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CN
China
Prior art keywords
liquid crystal
polarisation part
polarisation
crystal panel
thickness
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Pending
Application number
CN201710851697.7A
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Chinese (zh)
Inventor
中岛淳
中田美惠
村山俊介
大峰俊树
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Nitto Denko Corp
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Nitto Denko Corp
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Publication of CN107844002A publication Critical patent/CN107844002A/en
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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
    • 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
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes

Abstract

The present invention relates to liquid crystal panel, liquid crystal display device and polarisation part group.The liquid crystal panel (1) of the present invention has liquid crystal cells (4), is arranged at the 1st generally rectangular polarisation part (5a) of the 1st surface side and the 2nd generally rectangular polarisation part (5b) for the 2nd surface side for being arranged at foregoing liquid crystal unit (4) of foregoing liquid crystal unit (4).Foregoing 1st polarisation part (5a) has the absorption axiss extended along its long side direction, and foregoing 2nd polarisation part (5b) has the absorption axiss extended along its short side direction, foregoing 1st polarisation part (5a) and foregoing 2nd polarisation part (5b) arrange in a manner of the bearing of trend of mutual absorption axiss is orthogonal, and the thickness of foregoing 2nd polarisation part (5b) is more than the thickness of foregoing 1st polarisation part (5a).Such liquid crystal panel (1) is not likely to produce warpage.

Description

Liquid crystal panel, liquid crystal display device and polarisation part group
Technical field
The present invention relates to liquid crystal panel etc..
Background technology
Generally, the liquid crystal panel of liquid crystal display device have liquid crystal cells, be arranged at liquid crystal cells the 1st surface side the 1st Polarisation part and be arranged at liquid crystal cells the 2nd surface side (the opposite side of the 1st surface side) the 2nd polarisation part.
As the polarisation part used in liquid crystal panel, widely using makes the resin film containing polyvinyl alcohol resin etc. Polarisation part obtained from adsorbing the dichroic substances such as iodine and stretching.
Such polarisation part is easily shunk due to hot, humidity influence along draw direction.Therefore, in high temperature or how wet In environment, the 1st face of liquid crystal cells is influenceed by the convergent force of the 1st polarisation part and the 2nd face of liquid crystal cells is inclined by the 2nd The influence of the convergent force of light part, so as to the easy warpage of liquid crystal cells.The result of warpage is to produce following problem：Contain liquid crystal cells Warpage is integrally produced with the liquid crystal panel of 2 polarisation parts.When liquid crystal panel produces warpage, liquid crystal display device easily produces Lou The problems such as light, uneven display, it is therefore desirable to improve to it.
Patent document 1 discloses following Polarizer is used for into liquid crystal panel, in the Polarizer, polarisation part and diaphragm Gross thickness is set as less than 135 μm, has resin bed in the interlayer or polarisation plate surface of polarisation part and diaphragm, absorbs direction of principal axis Size changing rate be less than 0.40%.
The Polarizer by supporting the resin bed of polarisation part to reduce the polarisation slab warping that the contraction with polarisation part is accompanied, Therefore liquid crystal panel warpage can be prevented.
But do not solved yet, it is necessary to enter traveling one thoroughly the problem of liquid crystal panel warpage as caused by the contraction of polarisation part The improvement of step.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2002-372621 publications
The content of the invention
Problems to be solved by the invention
The problem of the present invention is, there is provided can effectively prevent liquid crystal panel of warpage etc..
The solution used to solve the problem
The present invention liquid crystal panel have liquid crystal cells, be arranged at foregoing liquid crystal unit the 1st surface side it is generally rectangular The 1st polarisation part and be arranged at foregoing liquid crystal unit the 2nd surface side the 2nd generally rectangular polarisation part, foregoing 1st polarisation part With the absorption axiss extended along its long side direction, and foregoing 2nd polarisation part has the absorption axiss extended along its short side direction, Foregoing 1st polarisation part and foregoing 2nd polarisation part arrange in a manner of the bearing of trend of mutual absorption axiss is orthogonal, and the foregoing 2nd is inclined The thickness of light part is more than the thickness of foregoing 1st polarisation part.
Preferably, the ratio (T1/ of the thickness (T2) of the thickness (T1) of foregoing 1st polarisation part and foregoing 2nd polarisation part T2 it is) 1/10~1/2.
It is furthermore preferred that foregoing 2nd polarisation part thickness (T2) and foregoing 1st polarisation part thickness (T1) difference (T2- T1) it is more than 2 μm.
It is furthermore preferred that at least any one polarisation part in foregoing 1st polarisation part and foregoing 2nd polarisation part is laminated with Diaphragm.
According to another aspect of the present invention, there is provided a kind of liquid crystal display device, it is equipped with the liquid crystal surface of the invention described above Plate.
According to another aspect of the present invention, there is provided a kind of polarisation part group.
The polarisation part group of the present invention has the 1st generally rectangular polarisation part and the 2nd generally rectangular polarisation part, foregoing 1st polarisation part has the absorption axiss extended along its long side direction, and foregoing 2nd polarisation part has along the extension of its short side direction Absorption axiss, foregoing 1st polarisation part and foregoing 2nd polarisation part arrange in a manner of the bearing of trend of mutual absorption axiss is orthogonal, The thickness of foregoing 2nd polarisation part is more than the thickness of foregoing 1st polarisation part.
The effect of invention
The liquid crystal panel of the present invention contains the 1st generally rectangular polarisation with the absorption axiss along long side direction extension Part and the 2nd generally rectangular polarisation part with the absorption axiss along short side direction extension, the 1st polarisation part and foregoing 2nd inclined Light part arranges in a manner of the bearing of trend of mutual absorption axiss is orthogonal, and then the thickness of the 2nd polarisation part is more than the 1st polarisation part Thickness.Therefore, in the inside of liquid crystal cells, due to the 1st polarisation part contraction and caused distortional stress with due to the 2nd polarisation part Contraction and caused distortional stress is balancedly offset, the result is that liquid crystal panel warpage can be prevented effectively.
Brief description of the drawings
Fig. 1 is the schematic sectional view for the embodiment for showing the liquid crystal display device of the present invention.
Fig. 2 is the schematic sectional view for the liquid crystal panel for showing the 1st embodiment.
Fig. 3 is the reference exploded perspective view of the configuration status for each layer for showing same liquid crystal panel.
Fig. 4 is the top view for showing the not contracted layered product with the 1st polarisation part.
Fig. 5 (a) be show the 1st polarisation part shrink after layered product top view, (b) is along Vb- by same layered product Sectional view obtained by the cut-out of Vb lines.
Fig. 6：The top view of not contracted layered product with the 2nd polarisation part is shown.
For Fig. 7 (a) to show the top view of the layered product after the contraction of the 2nd polarisation part, (b) is to show same layered product edge Sectional view obtained by the cut-out of VIIb-VIIb lines.
Fig. 8 is the schematic sectional view for the liquid crystal panel for showing the 2nd embodiment.
Fig. 9 (a) is the schematic sectional view of one of the liquid crystal panel for showing the 3rd embodiment, and (b) is to show that the 3rd is real Apply the schematic sectional view of another of the liquid crystal panel of mode.
Figure 10：The schematic sectional view of the liquid crystal panel of 4th embodiment is shown.
Figure 11：The explanation figure of the difference of height of optical laminate is shown.
Description of reference numerals
10 ... liquid crystal display devices, 1 ... liquid crystal panel, 2 ... light sources, 3 ... frames, 4 ... liquid crystal cells, the 1st is inclined by 5a (5) ... Light part (polarisation part), the 2nd polarisation parts of 5b (5) ... (polarisation part), 6 ... adhesive linkages, 7 ... diaphragms, 8 ... Polarizers
Embodiment
Hereinafter, the configuration example of the liquid crystal display device of the liquid crystal panel with the present invention is illustrated referring to the drawings, so The liquid crystal panel of the present invention is illustrated afterwards.Thickness and size equidimension in each figure is different from actual size, and this point please Notice.
It should be noted that in this manual, sometimes with the ordinal number such as " the 1st ", " the 2nd ", the sequence before term Number adds to distinguish term, the quality without term, order Deng Te the Do meanings.In addition, angle and its relation (such as orthogonal with parallel) includes the error range allowed in the technical field belonging to the present invention.For example, orthogonal include strictly The scope of ± 5 ° of angle (90 °), preferably comprise ± 3 ° of scope.It is parallel similarly.
And then in this manual, so that " number range that lower limit XXX~higher limit YYY " is represented refers to lower limit XXX Above and below higher limit YYY.In the case that aforementioned value scope records multiple scopes respectively, arbitrary lower limit can be selected Value and arbitrary higher limit are set " arbitrary lower limit~arbitrary higher limit ".
[configuration example of liquid crystal display device]
Fig. 1 shows one of the liquid crystal display device 10 of the liquid crystal panel 1 comprising the present invention.In Fig. 1, the upside of paper is Watch surface side (it can be seen that side of the image of liquid crystal display device), the downside of paper is to review to see the surface side (phase of viewing surface side Toss about).As shown in the drawing, liquid crystal display device 10 has liquid crystal panel 1, light source 2 and the side for keeping liquid crystal panel 1 and light source 2 Frame 3.
Here, generally, configuration of the liquid crystal display device 10 based on its internal light source 2 be roughly divided into reflection-type, transmission-type, And Semitransmissive.
In the liquid crystal display device 10 of reflection-type, be configured with the viewing surface side of liquid crystal panel 1 light source 2 (front light-source) or The side of liquid crystal cells 4 is configured with light source 2 (side light source), and figure is carried out by the light of baffle reflection front light-source or side light source As display.It should be noted that also have in the liquid crystal display device 10 of reflection-type using positioned at the outside of liquid crystal display device 10 Fluorescent lamp type as light source 2 of light, sunshine.
In the liquid crystal panel 1 of transmission-type, see that surface side is configured with light source 2 (backlight), the transmission back of the body in reviewing for liquid crystal panel 1 The light of light source and carry out image and show.
The liquid crystal panel 1 of Semitransmissive is the liquid crystal panel for being provided simultaneously with both above-mentioned transmission-type and reflection-type.Half transmitting The liquid crystal panel 1 of type carries out image using the light source 2 of backlight in the dark and shown, image is carried out in bright place's reflected sunlight Display.
Liquid crystal display device 10 shown in Fig. 1 is to see that surface side has the saturating of light source 2 (backlight) in reviewing for liquid crystal panel 1 The liquid crystal display device of emitting.Certainly, liquid crystal panel 1 of the invention can not only be equipped on the liquid crystal display device of transmission-type 10, but also the liquid crystal display device 10 (not shown) of reflection-type or Semitransmissive can be equipped on.
The light transmission liquid crystal panel 1 projected from light source 2 (backlight), so as to turn into the injection light comprising image information.Bag The light that injection containing image information is just seen as the image, the observer that reflect in liquid crystal display device 10.Specifically For, liquid crystal panel 1 is connected with the control units such as micro computer (not shown), and the micro computer possesses arithmetic processing section, storage part. By the control carried out by the control unit, turn into the injection light comprising image information through the light of liquid crystal panel 1.
Hereinafter, the liquid crystal panel 1 of the embodiment of 10 possessed of liquid crystal display device the 1st is illustrated, then to the 2nd Liquid crystal panel 1 to the 4th embodiment illustrates.
[liquid crystal panel of the 1st embodiment]
Fig. 2 and Fig. 3 shows one of liquid crystal panel 1 possessed by liquid crystal display device 10.
In the present embodiment, the upside for the paper for showing Fig. 2 and Fig. 3 is referred to as the 1st surface side, the downside of paper is referred to as 2nd surface side, to carry out the explanation of liquid crystal panel 1.
Generally rectangular 1st polarisation of the liquid crystal panel 1 with liquid crystal cells 4, the 1st surface side for being arranged at liquid crystal cells 4 Part 5a and be arranged at liquid crystal cells 4 the 2nd surface side the 2nd generally rectangular polarisation part 5b.Specifically, in liquid crystal cells 4 The 1st face be pasted with the 1st polarisation part 5a by the 1st adhesive linkage 6a comprising bonding agent or adhesive, the 2nd of liquid crystal cells 4 the Face is pasted with the 2nd polarisation part 5b by the 2nd adhesive linkage 6b comprising bonding agent or adhesive.Hereinafter, it is sometimes that the 1st and the 2nd is inclined Light part 5a, 5b are collectively referred to simply as " polarisation part 5 ", the 1st and the 2nd adhesive linkage 6a, 6b being collectively referred to simply as into " adhesive linkage 6 ".Need It is noted that the description of adhesive linkage 6 is eliminated in Fig. 3.
＜ liquid crystal cells ＞
As shown in Fig. 2 liquid crystal cells 4 are with a pair of liquid crystal cell substrates 41,41, sept 43 and liquid crystal layer 42.One It is the 2nd liquid positioned at the 2nd surface side in liquid crystal cell substrate 41,41, that positioned at the 1st surface side is the 1st liquid crystal cell substrate 41a Brilliant cell substrate 41b.
Sept 43 is the structure for making the 1st liquid crystal cell substrate 41a and the 2nd liquid crystal cell substrate 41b distance maintaining constant Part.Liquid-crystal compounds is injected with the space formed by sept 43, the layer being made up of the liquid-crystal compounds is liquid crystal layer 42.It should be noted that, although do not show specially, a usual base in the 1st and the 2nd liquid crystal cell substrate 41a, 41b Plate sets the switch element (such as TFT) of the electro-optical characteristic of control liquid-crystal compounds, and colour filter is set in another substrate. Switch element is connected with control units such as above-mentioned micro computers.
It is not particularly limited as long as the transparency of liquid crystal cell substrate 41 is excellent.Liquid crystal cell substrate 41 can be with use example Such as：The transparency glass plates such as soda-lime glass, low alkali pyrex, alkali-free aluminium pyrex, makrolon, polymethylacrylic acid Transparent resin plates such as methyl esters, polyethylene terephthalate, epoxy resin etc..
The liquid-crystal compounds for forming liquid crystal layer 42 is not particularly limited, can be according to the liquid crystal aligning mould of liquid crystal cells 4 Formula and liquid crystal display mode select suitable liquid-crystal compounds and used from existing known liquid-crystal compounds.
As the types of LC alignment of liquid crystal cells 4, can enumerate for example：Vertical orientated (VA) pattern, twisted nematic (TN) pattern, vertical orientating type electrically conerolled birefringence (ECB) pattern, (IPS) pattern and optical compensation birefringence are changed in face (OCB) pattern etc..
As the liquid crystal display mode of liquid crystal cells 4, can enumerate：To liquid-crystal compounds apply voltage in the state of into For the normal white mode pattern of the light from light source 2 (do not apply pass through in the state of voltage) shown in vain, and not to liquid-crystalizing Compound applies and turns into the normally black mode of black display in the state of voltage and (do not apply and be not through from light source 2 in the state of voltage The pattern of light).
＜ polarisation parts ＞
Polarisation part 5 is the structure that the rectilinearly polarized light with certain vibration direction is extracted from natural light (non-polarized light) Part.
As shown in figure 3, polarisation part 5 has absorption axiss A and the axis of homology along the direction orthogonal with absorption axiss A in its face (not shown).Polarisation part 5 has following property：Make the linear polarization of the direction of vibration with the bearing of trend parallel to the axis of homology Light optionally transmits.Hereinafter, the direction sometimes extended absorption axiss A is referred to as " absorption direction of principal axis ", by axis of homology extension Direction is referred to as " transmission direction of principal axis ".
In the present invention, using generally rectangular polarisation part 5.Generally, the shape of polarisation part 5 and the shape of liquid crystal cells 4 Shape is identical, preferably same shape and in the same size.In the present embodiment, using with the rectangular shape of liquid crystal cells 4 The rectangular polarisation part 5 that shape is identical and size is roughly the same.
Here, in this manual, it is (rectangular by forming that " generally rectangular " not only includes proper rectangle 2 long sides and 2 short sides of shape and form 4 right angles), and the present invention technical field allow in the range of also include Other shapes.As specific other shapes, can enumerate for example：Rectangular corner be chamfered after shape；It is rectangular Slightly shorter shape of than another long side of one long side etc..It is preferred that use the rectangular polarisation part 5 shown in present embodiment.
For generally rectangular polarisation part 5, it is not particularly limited for it relative to the length of the long side of short side, can Set with frame aspect ratios used by based on usually used liquid crystal display device 10 (such as TV etc.).For example, polarisation The lower limit of the long edge lengths of part 5 is 1.2 times of its bond length, preferably 1.5 times, more preferably 1.8 times, its long edge lengths Higher limit be 8.0 times of its bond length, preferably 5.0 times, more preferably 3.0 times.
By the lower limits of the long edge lengths of polarisation part 5 and higher limit in aforementioned range, the present invention described later can be based on The warpage of liquid crystal panel 1 prevent principle from effectively preventing the warpage of liquid crystal panel 1.
The polarisation part 5 used in the present invention is not particularly limited, arbitrary polarisation part can be used.Preferably, make The shrinkage factor (AS) of direction of principal axis, which is absorbed, with it transmits the polarisation part 5 of the shrinkage factor (TS) of direction of principal axis more than it.
Absorb direction of principal axis shrinkage factor (AS) by the size of the polarisation part after the size of not contracted polarisation part and contraction Lai Obtain, the size of the polarisation part after the contraction is at thermostatic chamber (temperature 60 C, humidity 90%RH) by not contracted polarisation part Obtained from placing 3 hours.
Specifically, the maximum length of the absorption direction of principal axis of not contracted polarisation part is set to X1, will be inclined after contraction When the maximum length of the absorption direction of principal axis of light part is set to X2, the shrinkage factor (AS) of absorption direction of principal axis is calculated based on following formula 1.
[formula 1] AS (%)={ (X1-X2)/X1 } × 100
In addition, the shrinkage factor (TS) of transmission direction of principal axis is also in the same manner as the shrinkage factor (AS) of absorption direction of principal axis by not contracted The size of polarisation part after the size of polarisation part and contraction is obtained, and the size of the polarisation part after the contraction is will be not contracted Polarisation part is obtained from thermostatic chamber (100 DEG C of temperature, humidity 80%RH) is placed 3 hours.
Specifically, the maximum length of the transmission direction of principal axis of not contracted polarisation part is set to Y1, will be inclined after contraction When the maximum length of the transmission direction of principal axis of light part is set to Y2, the shrinkage factor (TS) of transmission direction of principal axis is calculated based on following formula 2.
[formula 2] TS (%)={ (Y1-Y2)/Y1 } × 100
Absorb direction of principal axis shrinkage factor (AS) and transmission direction of principal axis shrinkage factor (TS) difference (Δ S) based on following formula 3 come Calculate.
[formula 3] Δ S (%)=AS-TS
Δ S value is not particularly limited, its lower limit is usually 1.0%, preferably 2.0%, more preferably 5.0%. In addition, Δ S higher limit is usually 15.0%, preferably 10.0%, more preferably 8.0%.
By Δ S in aforementioned range, it can prevent principle fully based on the warpage of liquid crystal panel 1 of the invention described later Prevent the warpage of liquid crystal panel 1.In addition, when Δ S is more than 15.0%, liquid crystal cells 4 are applied with excessive distortional stress, therefore It is unpractical.
As shown in figure 3, rectangular 1st and the 2nd polarisation part 5a, 5b have been used in the present embodiment, the 1st polarisation part 5a There is absorption axiss A in its long side direction (direction of rectangular long side extension), and the 2nd polarisation part 5b is (long in its short side direction The direction of square short side extension) there is absorption axiss A.
Therefore, in the 1st polarisation part 5a of present embodiment, the X1 in above-mentioned formula 1 is equivalent to the 1st not contracted polarisation part 5a long edge lengths, long edge lengths of the X2 equivalent to the 1st polarisation part 5a after contraction in above-mentioned formula 1.In addition, in above-mentioned formula 2 Bond lengths of the Y1 equivalent to the 1st not contracted polarisation part 5a, the Y2 in above-mentioned formula 2 is equivalent to the 1st polarisation part after contraction 5a bond length.On the other hand, in the 2nd polarisation part 5b of present embodiment, the X1 in above-mentioned formula 1 is equivalent to not contracted 2nd polarisation part 5b bond length, bond lengths of the X2 equivalent to the 2nd polarisation part 5b after contraction in above-mentioned formula 1.In addition, Long edge lengths of the Y1 equivalent to the 2nd not contracted polarisation part 5b in above-mentioned formula 2, after Y2 in above-mentioned formula 2 is equivalent to contraction 2nd polarisation part 5b long edge lengths.
Generally, polarisation part be roughly divided into make resin film absorption dichroic substance after stretched obtained from polarisation part (hereinafter referred to as " absorbent-type polarisation part ") and the coating solution containing organic pigment in arbitrary coated face and is dried Obtained from polarisation part (hereinafter referred to as " application type polarisation part ").
In the present invention, it is preferred to use absorbent-type polarisation part.During using absorbent-type polarisation part, can easily it meet above-mentioned Δ S value.
Dichroic substance included in absorbent-type polarisation part is not particularly limited.
As dichroic substance, can enumerate such as iodine, organic dyestuff.As organic dyestuff, for example red BR of use, Red LR, red R, pink LB, pinkish red BL, purplish red GS, sky blue LG, lemon yellow, blue BR, blue 2R, dark blue RY, green It is LG, purple LB, purple B, black H, black B, black GSP, yellow 3G, yellow R, orange LR, orange 3R, dark red GL, dark red KGL, Congo red, brilliant violet BK, Supra blue G, Supra blue GL, Supra orange GL, direct sky blue, directly it is resistance to Shine orange S, resistance to tanned etc..These dichroic substances can be used alone, or be used in combination of two or more.It is preferred that use Iodine.
Resin film (resin film of absorption dichroic substance) included in absorbent-type polarisation part is not limited especially It is fixed.As the resin for forming resin film, arbitrary suitable resin can be used.
As the resin for forming resin film, can enumerate for example：Cellulose esters system resin, polyester based resin, polyether sulfone It is resin, polysulfones system resin, polycarbonate-based resin, polyamide series resin, polyimides system resins, polyolefin-based resins, (first Base) acrylic resin, polyarylate system resin, polystyrene resin, polyvinyl alcohol resin and their mixture etc..
As the resin for forming resin film, preferably using selected from polyethenol series, polyester based resin, polystyrene tree It is at least one kind of in fat and polyamide series resin, more preferably using polyvinyl alcohol resin.By using polyvinyl alcohol resin, Above-mentioned Δ S value can easily be met.
As polyvinyl alcohol resin, can enumerate for example：Polyvinyl alcohol, ethylene-vinyl alcohol copolymer etc..
When using polyvinyl alcohol resin, polyvinyl alcohol resin can be by making the vinyl esters such as vinyl acetate It is that the vinyl esters based polymer that monomer polymerize to obtain carries out saponification to obtain.On its saponification degree, the degree of polymerization, from heat resistance etc. From the viewpoint of good, preferably using high saponification degree, the polyvinyl alcohol of high polymerization degree.
The saponification degree of polyvinyl alcohol resin is not particularly limited, for example, it is preferable to which 90 moles of %~100 mole %, special It is not more preferably 95.0 moles %~99.9 mole % saponification degree.By using the polyethenol series tree of such saponification degree Fat, above-mentioned Δ S value and the polarisation part 5 of excellent in te pins of durability can be met.It should be noted that saponification degree can be based on JIS K 6726-1994 are obtained.
The average degree of polymerization of polyvinyl alcohol resin is also not particularly limited, for example, it is preferable to 1,000~8,000, and then More preferably 1,200~3,600, particularly more preferably 1,500~5,000.Average degree of polymerization can be based on JIS K 6726-1994 To obtain.
Resin film containing polyvinyl alcohol resin can for example obtain as follows：By the tree containing polyvinyl alcohol resin Oil/fat composition is dissolved in the appropriate organic solvent such as water or/and DMSO, so as to make resin solution, by the resin solution film forming, So as to obtain.
The appropriate additive such as plasticizer, surfactant can also be coordinated by forming in the resin of resin film.As increasing Agent is moulded, can be enumerated for example：The polyalcohols such as ethylene glycol, glycerine.As surfactant, such as non-ionic surface work can be enumerated Property agent.By adding these plasticizer, surfactant, adsorptivity and excellent poly- of draftability of dichroic substance can be obtained Vinyl alcohol resin.The addition of plasticizer and surfactant is not particularly limited, generally, relative to polyethenol series tree The mass parts of fat 100 are respectively the mass parts of 1 mass parts~10.
1st polarisation part 5a and the 2nd polarisation part 5b can be of the same race, or not of the same race.1st polarisation part 5a and the 2nd is inclined Light part 5b refers to be of the same race：Both resin and dichroic substance included in 1st polarisation part 5a in the 2nd polarisation part 5b with being wrapped The resin contained is identical with dichroic substance.In addition, the 1st polarisation part 5a and the 2nd polarisation part 5b refers to be not of the same race：1st polarisation part At least one of resin and dichroic substance included in 5a and the resin and dichroism thing included in the 2nd polarisation part 5b Matter is different.It should be noted that the manufacturing condition such as and stretching ratio identical in both resin and dichroic substance also identical feelings Under condition, the 1st polarisation part 5a and the 2nd polarisation part 5b are identicals in addition to absorbing direction of principal axis and thickness.
It is preferred that the 1st polarisation part 5a and the 2nd polarisation part 5b is of the same race, it is phase more preferably in addition to absorbing direction of principal axis and thickness With.
In the present invention, as shown in figure 3, the 1st polarisation part 5a has the absorption axiss A extended along its long side direction, and the 2nd Polarisation part 5b has the absorption axiss A extended along its short side direction.Foregoing 1st polarisation part 5a and the 2nd polarisation part 5b are according to each other The absorption axiss A orthogonal mode of bearing of trend arrange.That is, the 1st polarisation part 5a and the 2nd polarisation part 5b, which matches somebody with somebody, is set to crossed Nicol (intersection Niccol) state.And then in the present invention, the 2nd polarisation part 5b thickness is more than foregoing 1st polarisation part 5a thickness. Therefore, in the present invention it is possible to effectively prevent the warpage of liquid crystal panel 1.
By the way that the so arrange the 1st and the 2nd polarisation part 5a, 5b is arranged at into liquid crystal cells 4, so as to effectively preventing The principle of the warpage of liquid crystal panel 1 is still not clear, and the present inventors speculates that principle is as follows.
Fig. 4 is the vertical view for showing to be pasted with not contracted rectangular 1st polarisation part 5a layered product on liquid crystal cells 4 Figure, for Fig. 5 (a) to show the top view of the layered product after the 1st polarisation part 5a contractions, Fig. 5 (b) is that the 1st polarisation part 5a shrinks Sectional view on the long side direction (direction parallel with rectangular long side) of layered product afterwards.
Polarisation part 5 has mainly along the property for absorbing direction of principal axis contraction.In the present invention, the 1st polarisation part 5a has edge The absorption axiss A of long side direction extension, therefore, in its contraction process, mainly along parallel with absorbing direction of principal axis and towards length The direction (direction shown in Fig. 4 arrow with round dot) of the central portion of square long side is shunk, hardly along with absorption axiss Shrink in the orthogonal direction in direction (short side direction).In other words, it may be said that the convergent force of the 1st polarisation part 5a long side direction is more than short The convergent force of edge direction.As a result, when the 1st polarisation part 5a shrinks, liquid crystal cells 4 are by the 1st polarisation part 5a along long side side To strong pull, so as to layered product as shown in Fig. 5 (b) along long side direction warpage.That is, it is plane under uncontracted position 1st polarisation part 5a of shape is deformed by way of contraction makes curved surface of the liquid crystal cells 4 according to long side direction generation U-shaped.
Therefore, in the case where the 1st polarisation part 5a is arranged at into the 1st surface side of liquid crystal cells 4, the 1st polarisation part 5a is passed through Contraction, apply the distortional stress of the curved surface for making long side direction produce U-shaped to the 1st face of liquid crystal cells 4 from the 1st polarisation part 5a (hereinafter referred to as " the 1st distortional stress ").
On the other hand, Fig. 6 is the layer for showing to be pasted with not contracted rectangular 2nd polarisation part 5b on liquid crystal cells 4 The top view of stack, Fig. 7 (a) be show the 2nd polarisation part 5b shrink after layered product top view, Fig. 7 (b) is shows the Sectional view on the short side direction (direction parallel with rectangular short side) of layered product after 2 polarisation part 5b contractions.
In the present invention, the 2nd polarisation part 5b has the absorption axiss A extended along short side direction.Therefore, in its contraction process In, mainly along direction (Fig. 6 arrow with round dot of central portion parallel with absorbing direction of principal axis and towards rectangular short side Shown direction) shrink, hardly shunk along the direction (long side direction) orthogonal with absorbing direction of principal axis.In other words, it may be said that The convergent force of 2nd polarisation part 5b short side direction is more than the convergent force of long side direction.As a result, when the 2nd polarisation part 5b shrinks When, liquid crystal cells 4 by the 2nd polarisation part 5b along short side direction strong pull, so as to layered product edge as shown in Fig. 7 (b) Short side direction warpage.That is, be the 2nd plane polarisation part 5b under uncontracted position by contraction and make liquid crystal cells 4 according to The mode that short side direction produces the curved surface of U-shaped deforms.
Therefore, in the case where the 2nd polarisation part 5b is arranged at into the 2nd surface side of liquid crystal cells 4, the 2nd polarisation part 5b is passed through Contraction, the 2nd polarisation part 5b the 2nd face of liquid crystal cells 4 is applied the curved surface for making short side direction produce U-shaped distortional stress (with It is referred to as " the 2nd distortional stress " down).
The 1st distortional stress applied from the 1st polarisation part 5a to liquid crystal cells 4 (makes long side direction produce answering for the curved surface of U-shaped Power) with liquid crystal cells 4 are applied from the 2nd polarisation part 5b the 2nd distortional stress (make short side direction generation U-shaped curved surface stress) It is opposite.Therefore, become in the inside for the liquid crystal cells 4 for being provided with the 1st and the 2nd polarisation part 5a, 5b, the 1st distortional stress and the 2nd Shape stress is offset.
The present inventors thinks, by making the 1st distortional stress and the 2nd distortional stress in the internal balance of liquid crystal cells 4 Offset, can prevent from including the warpage of liquid crystal panel 1 of liquid crystal cells 4.And have made intensive studies, as a result find, deformation should The length of absorption direction of principal axis and the thickness of polarisation part of the size of power dependent on polarisation part.Specifically, the present inventors sends out Existing, the more long then distortional stress of length of the absorption direction of principal axis of polarisation part is bigger, and the more short then distortional stress of length is smaller, and, partially The more thick then distortional stress of the thickness of light part is bigger, and more thin then distortional stress is smaller.
1st polarisation part 5a in its long side direction there is absorption axiss A, the 2nd polarisation part 5b to have absorption axiss in its short side direction A.If therefore it is believed that the 2nd polarisation part 5b thickness and the 1st polarisation part 5a thickness are identical or less than the 1st polarisation part 5a, Then the 1st distortional stress is excessive compared with the 2nd distortional stress as caused by the 2nd polarisation part 5b as caused by the 1st polarisation part 5a, in liquid The inside of brilliant unit 4, the 1st distortional stress are not offset fully by the 2nd distortional stress, as a result, the liquid containing liquid crystal cells 4 Crystal panel 1 produces warpage.
On this point, because the thickness of the 2nd polarisation part 5b in the present invention is more than the 1st polarisation part 5a, therefore opposite 2 Distortional stress (the 1st distortional stress and the 2nd distortional stress) liquid crystal cells 4 internal balance offset.It is believed that its result It is that can effectively prevent the warpage of the liquid crystal panel 1 containing liquid crystal cells 4.
As long as thickness of the 2nd polarisation part 5b thickness more than the 1st polarisation part 5a is not particularly limited.Certainly, the 2nd polarisation When part 5b is blocked up compared with the 1st polarisation part 5a, have above-mentioned 2 opposite distortional stresses in the inside of liquid crystal cells 4 not balancedly The worry of counteracting.
In view of these, the ratio (T1/T2) of the 1st polarisation part 5a thickness (T1) and the 2nd polarisation part 5b thickness (T2) Lower limit be preferably 1/15, more preferably 1/10, more preferably 1/5, particularly preferably 1/4.In addition, ratio (T1/ T2 higher limit) is preferably 1/2, more preferably 1/2.5, particularly preferably 1/3.
In addition, the 2nd polarisation part 5b thickness (T2) and the 1st polarisation part 5a thickness (T1) difference (T2-T1) lower limit Preferably 2 μm, more preferably 5 μm, more preferably 10 μm, particularly preferably 13 μm.In addition, the higher limit of poor (T2-T1) Preferably 30 μm, more preferably 25 μm, more preferably 20 μm, particularly preferably 17 μm.
Above-mentioned relation is met by the 1st polarisation part 5a and the 2nd polarisation part 5b thickness, in the inside of liquid crystal panel 1, conversely 2 distortional stresses balancedly offset, can effectively prevent the warpage of liquid crystal panel 1.
The lower limit of 1st polarisation part 5a thickness is preferably 2 μm, more preferably 3 μm, more preferably 4 μm, especially excellent Elect 5 μm as.In addition, the higher limit of the 1st polarisation part 5a thickness is preferably 20 μm, more preferably 15 μm, more preferably 10 μ M, particularly preferably 8 μm.
The lower limit of 2nd polarisation part 5b thickness is preferably 4 μm, more preferably 10 μm, more preferably 15 μm, especially Preferably 20 μm.In addition, the higher limit of the 2nd polarisation part 5b thickness is preferably 50 μm, more preferably 40 μm, more preferably 30 μm, particularly preferably 25 μm.
1st polarisation part 5a and the 2nd polarisation part 5b thickness are in above range, in the inside of liquid crystal panel 1, opposite 2 Individual distortional stress is balancedly offset, and can effectively prevent the warpage of liquid crystal panel 1.
The degree of polarization of polarisation part 5 is not particularly limited, for example, being more than 90%, preferably more than 95%, more preferably More than 96%, particularly preferably more than 99%.Degree of polarization can also for example be adjusted according to the 1st and the 2nd polarisation part 5a, 5b thickness It is whole.By making degree of polarization to obtain the high liquid crystal display device 10 of oblique contrast in above range.
It should be noted that degree of polarization can use spectrophotometer (in village color technical research institute (strain) make, product name " DOT-3 ") determine.
The single plate transmission of polarisation part 5 is preferably 35%~45%, and more preferably 39%~42%.By making monolithic Transmissivity can obtain the high liquid crystal display device 10 of oblique contrast in above range.
It should be noted that single plate transmission is the Y in the tristimulus values of 2 degree of visual fields based on JlS Z 8701-1995 Value.
＜ adhesive linkages ＞
In the present embodiment, as shown in Fig. 2 the 1st polarisation part 5a is pasted on liquid crystal cells 4 by the 1st adhesive linkage 6a 1st face, the 2nd polarisation part 5b are pasted on the 2nd face of liquid crystal cells 4 by the 2nd adhesive linkage 6b.
In the present invention, as described above, by the 1st distortional stress caused by the 1st polarisation part 5a contraction by inclined by the 2nd 2nd distortional stress caused by light part 5b contraction is balancedly offset, so as to effectively prevent the warpage of liquid crystal panel 1.Therefore, it is desirable to It is not easy to be absorbed by the 1st adhesive linkage 6a and caused 1st distortional stress by the 1st polarisation part 5a contraction, similarly, is expected that by 2nd polarisation part 5b contraction and caused 2nd distortional stress is not easy to be absorbed by the 2nd adhesive linkage 6b.I.e. it is desired to the 1st and the 2nd bonding Layer 6a, 6b is harder (flexibility is low).
Specifically, the hardness of adhesive linkage 6 is 30~90, preferably 50~90, more preferably 70~90.
It should be noted that the hardness of adhesive linkage 6 is to utilize the JIS K6253 (hardness of vulcanization rubber and thermoplastic elastomer Test method) described in A type hardness testers meter measure value.
The resin component of bonding agent or adhesive to forming adhesive linkage 6 is not particularly limited, it may be considered that with polarisation part 5 Included in resin film compatibility and suitably select.
As bonding agent or the resin component of adhesive, can enumerate for example：Acrylic resin, silicon-type resin, Polyester based resin, polyamide series resin, polyvinyl alcohol resin, epoxy system resin, fluorine resin and their mixture etc..
The resin component of bonding agent or adhesive is preferably identical with the resin film included in polarisation part 5.Its reason exists In the bonding force of polarisation part 5 and adhesive linkage 6 becomes strong, and polarisation part 5 becomes to be not easy to peel off from liquid crystal cells 4.For example, comprising poly- In the bonding of the polarisation part 5 of vinyl alcohol resin, it is expected to use the adhesive linkage 6 comprising polyvinyl alcohol resin.
The manufacture method ＞ of ＜ polarisation parts
In case of using absorbent-type polarisation part, to illustrate the manufacture method of the polarisation part of the present invention.
The polarisation part of the present invention can for example pass through swelling process, absorption process, stretching process, cross-linking process step and wash Wash drying process and make.Hereinafter, each operation is briefly described.
(swelling process)
It is the process for being swelled the resin film of dichroic substance to be adsorbed to be swelled process.The composition material of resin film Material can use above-mentioned material.Resin film is usually unstretched state in process is swelled.Generally, resin film is wound into Shape, it is imported into by the resin film after conveying roller debatching in swelling bath.
Swelling solution is filled with swelling bath.As swelling solution, usually using water.The liquid temperature of swelling bath is generally adjusted to 20~ 50 DEG C, it is preferably regulated as 30~40 DEG C.The time of impregnating resin film is usually 1~7 minute in swelling is bathed.
By the way that before absorption process, by swelling process, the dirt on the surface of resin film can be removed, and reduce The absorption of dichroic substance is uneven.
(absorption process)
Absorption process is the process for making the absorption dichroic substance of the resin film after swelling.
After resin film after above-mentioned swelling is extracted in being bathed from swelling, it is directed in absorption bath.
Being filled with absorption bath makes dichroic substance be dissolved in the staining solution that solvent forms.As the solvent, generally make With water, the organic solvent for having compatibility with water can also be added.
For absorption is bathed, the concentration of dichroic substance is not particularly limited, the matter of preferably 0.0001 mass %~10 Measure %, the mass % of more preferably 0.001 mass %~7.
As dichroic substance, foregoing illustrative material can be used.When using iodine as dichroic substance, Ke Yi Iodide are added in staining solution.As iodide, can enumerate such as KI, lithium iodide.The iodide just added For, the ratio (mass ratio) of iodine and iodide is preferably 1：5~1：100 ratio.
Dip time of the resin film in absorption is bathed is not particularly limited, preferably 20 seconds~1,800 seconds.In addition, The liquid temperature of absorption bath is preferably 20 DEG C~80 DEG C, more preferably 40 DEG C~60 DEG C.When the temperature of absorption bath is too high, there is film to melt it Worry, when too low, there is the worry of adsorptivity reduction of the dichroic substance to resin film.
(stretching process)
Stretching process is the process for implementing stretch processing to resin film.As stretch processing, uniaxial tension is generally carried out Processing.Stretch processing can be carried out in swelling process between absorption process, or in swelling process and/or the process of absorption process Middle progress.Stretch processing for example can be by changing the rotary speed for the multiple conveying rollers for transmitting resin film and easily real Apply.
By stretch processing, resin film is preferably drawn as 2 times~7 times of its raw footage, and more preferably 2.5 times~6 Times, particularly preferably 3 times~5 times.It should be noted that the raw footage of resin film is non-stretched before being swelled process to enter On the basis of resin film.
When stretching ratio is less than 2 times, have not only be difficult to the polarisation part for obtaining high degree of polarization but also be difficult to be met it is above-mentioned The worry of the polarisation part of Δ S scope.On the other hand, when stretching ratio is more than 7 times, there is the worry of film breaks.
By stretching process, the dichroic substance for being adsorbed in resin film is orientated along draw direction, as a result, Obtain producing the polarisation part of absorption axiss A strip along draw direction.
It should be noted that in the case where implementing multi-drawing processing, the scope of above-mentioned stretching ratio refers to always stretch Multiplying power.
(cross-linking process step)
Cross-linking process step is resin film (that is, the strip for making crosslinking agent with being impregnated with dichroic substance and being stretched Polarisation part) contact process.Cross-linking process step can be by importing crosslinking bath to implement by the polarisation part of strip.
Crosslinking bath, which is filled with, makes crosslinking agent be dissolved in the crosslinker solution that solvent forms.As solvent, such as water can be used, And then the organic solvent that there is compatibility with water can also be added.The concentration of crosslinking agent in solution is not particularly limited, it is excellent Elect the mass % of 0.01 mass %~20 as, the mass % of more preferably 0.1 mass %~10.The concentration of crosslinking agent is less than 0.01% When, there is the worry that cannot get sufficient cross-linking effect.On the other hand, the concentration of crosslinking agent is even more than 20%, cross-linking effect Almost no longer change, therefore cost performance is poor.
As crosslinking agent, can enumerate for example：The boron compounds such as boric acid, borax；Glyoxal；Glutaraldehyde etc..These can be with It is used alone a kind or is used in combination of two or more.
By the way that by cross-linking process step, the orientation for being adsorbed in the dichroic substance of resin film is stabilized, and can be obtained The polarisation part of the more excellent strip of water resistance.
(washing drying process)
Washing drying process is unnecessary from the removing of the surface of the polarisation part by strip obtained from cross-linking process step The process of crosslinker solution.Washing can be by importeding into washing bath come real after the polarisation part of strip is extracted from crosslinking bath Apply.
Cleaning solution is filled with washing bath.As cleaning solution, usually using water.It is molten that unnecessary crosslinking is removed by washing bath After liquid, polarisation part is extracted from washing bath, and imported into drying device.
Polarisation part is thermally dried by using drying device, will not adhere to unnecessary crosslinking agent so as to obtain surface Strip polarisation part.It should be noted that the drying temperature of heater is usually 20~50 DEG C, drying time is 1~ 10 minutes.When the drying temperature of heater is more than 50 DEG C, has and just occur partially before polarisation part is arranged at into liquid crystal panel 1 The worry that light part shrinks.When drying time was more than 10 minutes similarly.
The polarisation part for the strip that have passed through washing drying process is cut into specific dimensions, so as to obtain the inclined of the present invention Light part.
In the liquid crystal panel 1 of the present invention, the 1st surface side of liquid crystal cells 4 is provided with the 1st polarisation part 5a, in liquid crystal cells 4 The 2nd surface side be provided with thickness be more than the 1st polarisation part 5a the 2nd polarisation part 5b.
1st polarisation part 5a is to have absorption axiss A generally rectangular polarisation part 5, the 2nd polarisation part 5b in its long side direction To have absorption axiss A generally rectangular polarisation part 5 in its short side direction.Also, two polarisation part 5a, 5b are configured to intersect Buddhist nun Cole's state.
Therefore, in the inside of liquid crystal cells 4, is passed through by the 1st distortional stress caused by the 1st polarisation part 5a contraction 2nd distortional stress caused by 2 polarisation part 5b contraction is offset, as a result, it is possible to effectively prevent the warpage of liquid crystal panel 1.
, can be according to it should be noted that when the liquid crystal panel 1 of present embodiment is equipped on into liquid crystal display device 10 1st surface side of liquid crystal panel 1 turns into the mode of viewing surface side of liquid crystal display device 10, and (that is, the 1st polarisation part 5a is located at viewing face Side and the 2nd polarisation part 5b are located at the mode reviewed and see surface side) configured, it can also turn into according to the 2nd surface side of liquid crystal panel 1 (that is, the 2nd polarisation part 5b is positioned at viewing surface side and the 1st polarisation part 5a is positioned at anti-for the mode of the viewing surface side of liquid crystal display device 10 Watch the mode of surface side) configured.Under either case, the warpage of liquid crystal panel 1 can be effectively prevented.
In the liquid crystal panel 1 of 1st embodiment, without the other layers of stacking, in the present invention, polarisation part 5 on polarisation part 5 Diaphragm etc. can be laminated with.
Hereinafter, to be provided with liquid crystal cells 4 Polarizer, of the invention the 2nd with polarisation part 5 and diaphragm to The liquid crystal panel 1 of 4th embodiment illustrates.On the liquid crystal panel 1 of the 2nd to the 4th embodiment, main explanation and the 1st The different feature of embodiment, then suitably omitted the description for identical feature.
It should be noted that Fig. 8 into Figure 10, is formed to describe the layer of liquid crystal panel 1 in easily understandable manner, saved The adhesive linkage of folder between the layers has been omited, description is also simplify for liquid crystal cells 4.To what is used in the 2nd to the 4th embodiment Adhesive linkage is not particularly limited, and can use the 1st and the 2nd adhesive linkage 6a, 6b identical adhesive linkage with the 1st embodiment.
[liquid crystal panel of the 2nd embodiment]
In the liquid crystal panel 1 of the 2nd embodiment shown in Fig. 8, have the 1st of the 1st polarisation part 5a and the 1st diaphragm 7a Polarizer 8a is arranged at the 1st surface side of liquid crystal cells 4, and the 2nd Polarizer 8b with the 2nd polarisation part 5b and the 2nd diaphragm 7b is set It is placed in the 2nd surface side of liquid crystal cells 4.For example, the 1st Polarizer 8a can by the 1st polarisation part 5a the 1st surface side by bonding Layer pastes the 1st diaphragm 7a to make, and the 2nd Polarizer 8b can be by gluing in the 2nd polarisation part 5b the 2nd surface side by adhesive linkage The 2nd diaphragm 7b is pasted to make.
Hereinafter, the 1st and the 2nd diaphragm 7a, 7b is collectively referred to simply as " diaphragm 7 ", by the 1st and the 2nd Polarizer sometimes 8a, 8b are collectively referred to simply as " Polarizer 8 ".
Diaphragm 7 is not particularly limited, preferably uses mechanical strength and will not extra-inhibitory the 1st and the 2nd polarisation The flexible film of part 5a, 5b contraction.The reason for this is that the present invention is to utilize to be produced by the 1st and the 2nd polarisation part 5a, 5b contraction Raw 2 opposite distortional stresses prevent the warpage of liquid crystal panel 1, if the 1st and the 2nd polarisation part 5a, 5b contraction is protected The extra-inhibitory of cuticula 7, then 2 opposite distortional stresses will not in the internal-neutralized of liquid crystal cells 4, have liquid crystal panel 1 produce stick up Bent worry.
The preferably clear of diaphragm 7." transparent " refers to：Property with the visible ray through wavelength 360nm~830nm.Thoroughly It is bright to include：The light transmissive situation (water white transparency) of the substantial whole wavelength for not absorbing visible ray, making visible region, and Absorb the light of the part wavelength of visible region and make the light transmissive situation (colored transparent) beyond the wavelength.Diaphragm 7 is preferred For water white transparency.When diaphragm 7 is water white transparency, can prevent from liquid crystal display device 10 project light coloring it is (optical Coloring).Specifically, the total light transmittance of diaphragm 7 is more than 50%, preferably more than 70%, more preferably more than 90%.Need It is noted that total light transmittance is the value based on JIS K7375 measure.
In addition, diaphragm 7 preferably has moisture resistance.Specifically, the moisture permeability of diaphragm 7 is usually 150g/m2/24h Hereinafter, preferably 120g/m2/ below 24h, more preferably 100g/m2/ below 24h.The moisture permeability of diaphragm 7 is in such scope When, it can effectively prevent liquid crystal cells 4 from being deteriorated due to moisture.
It should be noted that moisture permeability be the moisture permeability test (agar diffusion method) based on JIS Z 0208 in 40 DEG C of temperature, humidity Determined in 92%RH environment in 24 hours and pass through area 1m2Sample steam vapour amount (g) and the value obtained.
The resin for forming diaphragm 7 is not particularly limited, can be enumerated for example：Polyethylene terephthalate, gather The polyester based resins such as (ethylene naphthalate)；The cellulose-based resins such as cellulose diacetate, Triafol T；Poly- methyl-prop E pioic acid methyl ester etc. (methyl) acrylic resin；The polystyrenes such as polystyrene, acrylonitrile styrene copolymer (AS resins) Resin；Polycarbonate-based resin；Vinyl chloride-based resin；The acid amides such as nylon, aromatic polyamide system resin；Imide series resin； Sulfone system resin；Aromatic ester system resin；Epoxy system resin and their mixture etc..
As the resin for forming diaphragm 7, preferably using selected from (methyl) acrylic resin, polyester based resin, benzene second It is at least one kind of in alkene system resin, more preferably use (methyl) acrylic resin.
The high mechanical strength of (methyl) acrylic resin, it is more soft, and readily satisfy above-mentioned moisture permeability and it is total thoroughly Light rate, therefore preferably as the formation materials'use of diaphragm 7.
As (methyl) acrylic resin, can enumerate for example：Poly- (methyl) acrylic acid such as polymethyl methacrylate Ester, methyl methacrylate-(methyl) acrylic copolymer, methyl methacrylate-(methyl) acrylate copolymer, methyl Methyl acrylate-acrylic acid ester-(methyl) acrylic copolymer, (methyl) acrylate-styrene copolymer etc..
The weight average molecular weight of (methyl) acrylic resin is preferably 10,000~500,000.When weight average molecular weight is too small, Have to form the worry of mechanical strength deficiency after film.On the other hand, when weight average molecular weight is excessive, there is viscosity during melting extrusion The worry that high, molding processibility reduces, the productivity ratio of products formed reduces.
From the viewpoint of above-mentioned desired physical property is obtained, as (methyl) acrylic resin, preferably using having (methyl) acrylic resin of glutarimide unit, more preferably using has glutarimide unit and methyl methacrylate (methyl) acrylic resin of ester units.
Using the feelings with glutarimide unit and (methyl) acrylic resin of methyl methacrylate units Under condition, preferably its acid imide rate is 2.5%~5.0%, and acid number is 0.1mmol/g~0.5mmol/g, containing less than 1 weight Measure % acrylic ester unit.
The thickness of diaphragm 7 is not particularly limited, usually 2 μm~100 μm, preferably 2 μm~50 μm, more preferably 2 μm~30 μm, more preferably 2 μm~10 μm.
Diaphragm 7 in such thickness range, can not extra-inhibitory the 1st and the 2nd polarisation part 5a, 5b contraction and guarantor Protect the 1st and the 2nd polarisation part 5a, 5b.
In the present embodiment, due to being laminated with the 1st diaphragm 7a (that is, by the 1st diaphragm on the 1st polarisation part 5a 7a supports the 1st polarisation part 5a), therefore compared with the 1st embodiment, the 1st polarisation part 5a, which shrinks, somewhat becomes difficult.It is as a result, right Liquid crystal cells 4 apply 1st distortional stress smaller than caused 1st distortional stress in the 1st embodiment.
But in the present embodiment, the 2nd diaphragm 7b is also laminated with the 2nd polarisation part 5b, therefore pass through this implementation 2nd polarisation part 5b of mode deformation and caused 2nd distortional stress are again smaller than the 2nd polarisation part 5b by the 1st embodiment Deformation and caused 2nd distortional stress.
Therefore, in the present embodiment, also based on principle in a same manner as in the first embodiment, 2 opposite distortional stresses (the 1st distortional stress and the 2nd distortional stress) liquid crystal cells 4 internal balance offset, as a result, it is possible to effectively prevent The warpage of liquid crystal panel 1 containing liquid crystal cells 4.
[liquid crystal panel of the 3rd embodiment]
In the liquid crystal panel 1 of the 3rd embodiment shown in Fig. 9, only set in the 1st surface side of liquid crystal cells 4 or the 2nd surface side It is equipped with Polarizer 8.
Specifically, in Fig. 9 (a), only it is provided with the 1st surface side of liquid crystal cells 4 with the 1st polarisation part 5a and 1 diaphragm 7a the 1st Polarizer 8a, and the 2nd surface side of liquid crystal cells 4 is provided with the 2nd polarisation part 5b.In Fig. 9 (b), The 2nd surface side of liquid crystal cells 4 is only provided with the 2nd Polarizer 8b with the 2nd polarisation part 5b and the 2nd diaphragm 7b, and in liquid 1st surface side of brilliant unit 4 is provided with the 1st polarisation part 5a.
The warpage of liquid crystal panel 1 for the 1st embodiment that 3rd embodiment for example can be used for after desired amendment long-term use Situation.
Specifically, although can effectively prevent liquid crystal panel 1 from sticking up by using the liquid crystal panel 1 of the 1st embodiment Song, but have the long-term use due to liquid crystal display device 10 and liquid crystal panel 1 produces the worry of a little warpage.It is believed that this Due to the long-term use due to liquid crystal display device 10, the balance of the 1st distortional stress and the 2nd distortional stress 2 is somewhat broken It is bad.
In this case, the polarisation part 5 for only changing liquid crystal panel 1 is substantially impossible.Reason is, polarisation part 5 It is to be pasted onto by adhesive linkage on liquid crystal cells 4.
Here, in the long-term use due to liquid crystal display device 10 so as to which liquid crystal panel 1 produces according to along its long side direction The mode of the curved surface of raw U-shaped and in the case of deforming, it is believed that, the 1st distortional stress became compared with the 2nd distortional stress Greatly.Therefore, the 1st diaphragm 7a is folded to form the 1st polarisation by the 1st surface layer (a) such as Fig. 9 in the 1st polarisation part 5a Plate 8a, so as to reduce the 1st distortional stress.It is possible thereby to be adjusted to the 1st distortional stress again by the 2nd distortional stress balancedly Offset.
On the other hand, long-term use of so as to which liquid crystal panel 1 is according to along its short side side due to liquid crystal display device 10 In the case of being deformed to the mode for the curved surface for producing U-shaped, it is believed that, the 1st distortional stress becomes compared with the 2nd distortional stress It is too small.Therefore, it is inclined to form the 2nd by the folded 2nd diaphragm 7b of the 2nd surface layer (b) such as Fig. 9 only in the 2nd polarisation part 5b Tabula rasa 8b, so as to reduce the 2nd distortional stress.Thus, it is possible to it is equal by the 2nd distortional stress again to be adjusted to the 1st distortional stress Offset on weighing apparatus ground.
The diaphragm 7 used in present embodiment can use and above-mentioned 2nd embodiment identical diaphragm.Certainly, In the present embodiment, it is therefore intended that the 1st distortional stress of change or the 2nd distortional stress consciously, therefore preferred diaphragm 7 Thickness is more than the value illustrated in the 2nd embodiment.Specifically, the thickness of diaphragm 7 is not particularly limited, usually 100 μ M~500 μm, preferably 100 μm~300 μm, more preferably 100 μm~200 μm.
[liquid crystal panel of the 4th embodiment]
In the liquid crystal panel 1 of the 4th embodiment shown in Figure 10, there is diaphragm 7 using on the two sides of polarisation part 5 Polarizer 8.The Polarizer 8,8 is respectively arranged at the 1st surface side and the 2nd surface side of liquid crystal cells 4.It is arranged at the 1st of liquid crystal cells 4 the 1st Polarizer 8a of surface side has the 1st polarisation part 5a, the 1st diaphragm 7a and layer being layered on the 1st polarisation part 5a the 1st face The 3rd diaphragm 7c being stacked on the 1st polarisation part 5a the 2nd face.In addition, it is arranged at the 2nd polarisation of the 2nd surface side of liquid crystal cells 4 Plate 8b has the 2nd polarisation part 5b, the 2nd diaphragm 7b being layered on the 2nd polarisation part 5b the 1st face and is layered in the 2nd polarisation part The 4th diaphragm 7d in 5b the 2nd face.
Present embodiment is that the liquid crystal panel of further improvement has been carried out to the liquid crystal panel 1 of the 2nd embodiment.In this reality Apply in mode, used the Polarizer 8 with 2 diaphragms 7,7, therefore can more reliably protect liquid crystal cells 4 and polarisation Part 5.
3rd and the 4th diaphragm 7c, 7d can substantially have optically isotropic film or phase retardation film.
" diaphragm 7 substantially has optical isotropy " refers to that the index ellipsoid body of diaphragm 7 not only includes nx= Nz=ny situation, also include nx ≈ nz ≈ ny situation.
Specifically, birefringence Δ nxy (nx-ny) absolute value and thickness direction are two-fold in the face comprising diaphragm 7 Penetrate rate Δ nxz (nx-nz) absolute value be less than 0.0005 situation, preferably less than 0.0001, more preferably 0.00005 with Under.
It should be noted that in this manual, " nx " represent by 23 DEG C, on the basis of wavelength 590nm, object (here For diaphragm 7) face in refractive index reach the refractive index in maximum direction (X-direction), foregoing " ny " is represented in the same face Refractive index on the direction (Y direction) orthogonal with X-direction, foregoing " nz " represent orthogonal with foregoing X-direction and Y direction Direction (thickness direction) on refractive index.
As with optically isotropic 3rd and the 4th diaphragm 7c, 7d, the protection with the 2nd embodiment can be used The same film of film 7.Film containing (methyl) acrylic resin due to optical isotropy is excellent and it is preferred that using.
By using phase retardation film as the 3rd and the 4th diaphragm 7c, 7d, the display of liquid crystal display device 10 can be improved Characteristic (such as oblique contrast) etc..It should be noted that phase retardation film is in its face and/or thickness direction has phase difference Hyaline membrane.
In the face of phase retardation film and/or the phase difference value of thickness direction is preferably 10nm~100nm, and more preferably 30nm~ 80nm。
It should be noted that for phase difference value in face, birefringence (Δ nxy) is asks by Δ nxy × d (nm) in face The value gone out, thickness direction phase difference value is by { (nx+ny)/2 }-nz) values obtained of × d (nm).D is the thickness of phase retardation film Degree.
The resin for forming phase retardation film is not particularly limited, such as polyimides system resins, Polyester tree can be enumerated Fat, norbornene resin, cellulose-based resin and their mixture etc.., can be with by being sheet by these resin film forming Obtain phase retardation film.
The liquid crystal panel 1 of the present invention is not limited by the specific composition shown by the 1st to the 4th embodiment, can be at this It is appropriate in the required scope of invention to change design.
For example, it is also possible to using the Polarizer for the diaphragm 7 that more than 2 layers are laminated with the 1st and the 2nd polarisation part 5a, 5b, The 1st Polarizer 8a that 1 layer of diaphragm 7 is laminated with the 1st polarisation part 5a can also be used and be laminated on the 2nd polarisation part 5b There is the 2nd Polarizer 8b of more than 2 layers of diaphragm 7.
[purposes of liquid crystal panel]
The liquid crystal panel of the present invention can be used for arbitrary liquid crystal display device.As liquid crystal display device, example can be enumerated Such as:The OA equipment such as personal computer displays, notebook computer, smart mobile phone；Digital camera, handheld game device etc. are portable Formula equipment；The household electrical appliance such as video camera, TV, micro-wave oven；Rear monitor, auto-navigation system, automobile audio etc. are vehicle-mounted Equipment；The presentation devices such as shop monitor；The guard equipment such as monitoring monitor；Nurse monitor, medical monitor Deng Medical Devices etc..
The liquid crystal display device for being equipped with the liquid crystal panel of the present invention is not easy due to temperature when liquid crystal display device uses Change and liquid crystal panel warpage occurs, as a result, being not susceptible to light leak, showing the problems such as uneven.
In addition, in the present invention it is possible to used using the 1st and the 2nd polarisation part 5a, 5b as polarisation part group.Can should Polarisation part group is applied to light modulation object.The light modulation object refers to the object in addition to above-mentioned liquid crystal cells 4.
That is, the 1st surface side of the light modulation object beyond liquid crystal cells 4 sets the 1st polarisation part 5a and in its 2nd surface side 2nd polarisation part 5b is set, so as to form the optical laminate beyond liquid crystal panel.Such optical laminate also based on The same principle of liquid crystal panel of the present invention and can effectively prevent warpage.As the light modulation object beyond liquid crystal cells 4, It can enumerate such as glass pane.
Embodiment
The present invention is described in detail for embodiment described below and comparative example.It should be noted that the present invention is not only It is limited to following embodiments.The assay method of the warpage variable quantity used in embodiment and comparative example and used various Film is as follows.
[measure of warpage variable quantity]
For the optical laminate made in embodiment and comparative example, be set to make thereon lateral deviation tabula rasa skywards side and make Towards the state of ground side, measure is located most closely to the part (foot) of ground side to most leaning on for the lower surface of its downside Polarizer The difference of height D1 (mm) (reference picture 11) of the part (topmost) of nearly sky side, using difference of height D1 as " initial amount of warpage ". It should be noted that difference of height D1 measure is in the air, in optical laminate and horizontal plane as far as possible close in the state of parallel Carry out (difference of height D2 described later is similarly).
Then, optical laminate is put into and is adjusted to 60 DEG C, heating container (the ESPEC Corp. systems of 90%RH atmosphere： Product name " cryogenic thermostat humidistat ") in, place 48 hours.
After heating container takes out optical laminate, be put into heating container before in the same manner as determine foot and topmost Difference of height D2 (mm), using difference of height D2 as " amount of warpage after heating ".
The absolute value of the difference (D2-D1) of amount of warpage (D2) and initial amount of warpage (D1) is as optical laminate after heating " warpage variable quantity " and evaluated.Warpage variable quantity is more big, means that heating front and rear optical laminate occurs significantly warpage, Warpage variable quantity is smaller, means optical laminate almost without because heating and warpage.
[the polarisation part and diaphragm that are used in the making of optical laminate]
The polarisation part and diaphragm of optical laminate made by composition embodiment and comparative example are by following preparation method Obtained from.Have it should be noted that the polarisation part and diaphragm that are used in embodiment and comparative example are all fitly cut into The rectangle of longitudinal 225mm × horizontal 400mm size.
(polarisation part)
＜ polarisation part A ＞
Noncrystalline polyethylene terephthalate (A-PET) resin is squeezed for 270 degree by T modulus methods in forming temperature Go out shaping, so as to make the base material of 200 μm of thickness.Painting polyethylene alcohol resin (Japanese synthetic chemical industry on the substrate (strain) makes：Product name " Gohsenol NH-18 ") the aqueous solution (solid component concentration 10%) and dry, so as to make thickness 10 μm dry coating, obtain the layered product of base material and dry coating.By stretching-machine between the layered product roller at 100 DEG C along length After edge direction is stretched as 1.8 times, soaked successively in 4 baths of the condition shown in following [1]~[4] when conveying layered product Stain, swelling, absorption, crosslinking, the washing of film is dried.It should be noted that in crosslinking bath, along the long side of layered product Direction is stretched in a manner of total stretching ratio reaches 6 times.
[1] swelling bath：Impregnated 120 seconds in 28 DEG C of pure water
[2] absorption bath：Containing the parts by weight of iodine 1,30 DEG C of the parts by weight of KI 10 water-soluble relative to the parts by weight of water 100 Impregnated 60 seconds in liquid
[3] crosslinking bath：300 are impregnated in 60 DEG C of the aqueous solution for containing the parts by weight of boric acid 7.5 relative to the parts by weight of water 100 Second
[4] washing bath：Impregnated 10 seconds in pure water
Then, A-PET resin base materials are peeled off from layered product, are obtained by the dry coating (polarisation of 5 μm of the thickness of iodine staining Part).The polarisation part that this is obtained fitly is cut into rectangle, obtained inclined in absorbent-type of the transverse direction (long side direction) with absorption axiss Light part A.
＜ polarisation part B ＞
Make polyvinyl alcohol resin film (the Kuraray Co. Ltd. system of 60 μm of thickness：Product name " VF-PE-A#6000 ") Absorption iodine is simultaneously stretched to 6 times, so as to make the polarisation part of 22 μm of thickness.The polarisation part is fitly cut into rectangle, obtained Longitudinal direction has the absorbent-type polarisation part B of absorption axiss.
＜ polarisation part C ＞
Make polyvinyl alcohol resin film (the Kuraray Co. Ltd. system of 45 μm of thickness：Product name " VF-PS-N#4500 ") Absorption iodine is simultaneously stretched to 6 times, so as to make the polarisation part of 18 μm of thickness.The polarisation part is fitly cut into rectangle, obtained Longitudinal direction (short side direction) has the absorbent-type polarisation part C of absorption axiss.
＜ polarisation part D ＞
After obtaining the polarisation part of 22 μm of thickness in the same manner as polarisation part B preparation method, it is fitly cut into rectangle, obtained In the absorbent-type polarisation part D laterally with absorption axiss.
＜ polarisation part E ＞
After obtaining the polarisation part of 5 μm of thickness in the same manner as polarisation part A preparation method, it is fitly cut into rectangle, obtained In the absorbent-type polarisation part E longitudinally with absorption axiss.
(diaphragm)
＜ diaphragm A ＞
Acrylic resin film (make by Japan's steel metal plate (strain)：Product name " HX-40UC ").40 μm of thickness.
＜ diaphragm B ＞
Acrylic resin film (make by Japan's steel metal plate (strain)：Product name " HX-40NE ").40 μm of thickness.
[bonding agent used in the making of optical laminate]
In embodiment and comparative example, in order to which the above-mentioned polarisation part enumerated and diaphragm are laminated, and active-energy is used Ray curing bonding agent (Japanese synthetic chemical industry (strain) system：Product name " Z200 ").It should be noted that use the activity Each thickness for the adhesive linkage that energy ray-curable bonding agent is formed is 0.7 μm.
In addition, using pressure sensitive bonding agent in order to which upside Polarizer and downside Polarizer is Nian Jie with glass plate, (day is eastern The acrylic adhesive of electrician's (strain) system).It should be noted that each thickness of the adhesive linkage formed using the pressure sensitive bonding agent Spend for 23 μm.
[embodiment 1]
Rise from below after stacking gradually diaphragm B, polarisation part A, diaphragm A, anti-glare is implemented to diaphragm A upper surface Processing, so as to make upside Polarizer.Upside Polarizer is set as being arranged at the layered product of the 1st surface side of liquid crystal cells.
Then, rise from below and stack gradually diaphragm A, polarisation part B, diaphragm B, so as to make downside Polarizer.Downside Polarizer is set as being arranged at the layered product of the 2nd surface side of liquid crystal cells.
Next, it is laminated longitudinal direction in the upper surface of downside Polarizer (diaphragm B upper surface) using pressure sensitive bonding agent 245mm × horizontal 420mm, thickness 0.55mm glass plate (unrestrained nitre of pine industrial (strain) system), then in the upper surface of glass plate The lower surface (diaphragm B lower surface) of stacking upside Polarizer, so as to make optical laminate.Obtained optical laminate In, polarisation part A and the extension of the mutual absorption axiss of polarisation part B included in the Polarizer of downside included in the Polarizer of upside Direction is orthogonal.
For made optical laminate, warpage variable quantity is calculated according to the assay method of above-mentioned warpage variable quantity.Will The results are shown in table 1 below.
[embodiment 2]
Rise from below after stacking gradually diaphragm B, polarisation part A, diaphragm A, anti-glare is implemented to diaphragm A upper surface Processing, so as to make upside Polarizer.Upside Polarizer is set as being arranged at the layered product of the 1st surface side of liquid crystal cells.
Then, rise from below and stack gradually diaphragm A, polarisation part C, diaphragm B, so as to make downside Polarizer.Downside Polarizer is set as being arranged at the layered product of the 2nd surface side of liquid crystal cells.
Next, it is laminated longitudinal direction in the upper surface of downside Polarizer (diaphragm B upper surface) using pressure sensitive bonding agent 245mm × horizontal 420mm, thickness 0.55mm glass plate (unrestrained nitre of pine industrial (strain) system), then, in the upper surface of glass plate The lower surface (diaphragm B lower surface) of stacking upside Polarizer, so as to make optical laminate.Obtained optical laminate In, polarisation part A and the extension of the mutual absorption axiss of polarisation part C included in the Polarizer of downside included in the Polarizer of upside Direction is orthogonal.
For made optical laminate, warpage variable quantity is calculated according to the assay method of above-mentioned warpage variable quantity.Will The results are shown in table 1 below.
[comparative example 1]
Rise from below after stacking gradually diaphragm B, polarisation part D, diaphragm A, anti-glare is implemented to diaphragm A upper surface Processing, so as to make upside Polarizer.Upside Polarizer is set as being arranged at the layered product of the 1st surface side of liquid crystal cells.
Then, rise from below and stack gradually diaphragm A, polarisation part E, diaphragm B, so as to make downside Polarizer.Downside Polarizer is set as being arranged at the layered product of the 2nd surface side of liquid crystal cells.
Next, it is laminated longitudinal direction in the upper surface of downside Polarizer (diaphragm B upper surface) using pressure sensitive bonding agent 245mm × horizontal 420mm, thickness 0.55mm glass plate (unrestrained nitre of pine industrial (strain) system), then, in the upper surface of glass plate The lower surface (diaphragm B lower surface) of stacking upside Polarizer, so as to make optical laminate.Obtained optical laminate In, polarisation part D and the extension of the mutual absorption axiss of polarisation part E included in the Polarizer of downside included in the Polarizer of upside Direction is orthogonal.
For made optical laminate, warpage variable quantity is calculated according to the assay method of above-mentioned warpage variable quantity.Will The results are shown in table 1 below.
[comparative example 2]
Rise from below after stacking gradually diaphragm B, polarisation part A, diaphragm A, anti-glare is implemented to diaphragm A upper surface Processing, so as to make upside Polarizer.Upside Polarizer is set as being arranged at the layered product of the 1st surface side of liquid crystal cells.
Then, rise from below and stack gradually diaphragm A, polarisation part E, diaphragm B, so as to make downside Polarizer.Downside Polarizer is set as being arranged at the layered product of the 2nd surface side of liquid crystal cells.
Next, it is laminated longitudinal direction in the upper surface of downside Polarizer (diaphragm B upper surface) using pressure sensitive bonding agent 245mm × horizontal 420mm, thickness 0.55mm glass plate (unrestrained nitre of pine industrial (strain) system), then, in the upper surface of glass plate The lower surface (diaphragm B lower surface) of stacking upside Polarizer, so as to make optical laminate.Obtained optical laminate In, polarisation part A and the extension of the mutual absorption axiss of polarisation part E included in the Polarizer of downside included in the Polarizer of upside Direction is orthogonal.
For made optical laminate, warpage variable quantity is calculated according to the assay method of above-mentioned warpage variable quantity.Will The results are shown in table 1 below.
【Table 1】
[evaluation]
In Examples 1 and 2, the thickness of the polarisation part of downside Polarizer is more than the thickness of the polarisation part of upside Polarizer. Therefore, due to upside Polarizer polarisation part contraction distortional stress with due to downside Polarizer polarisation part contraction Distortional stress glass plate internal balance offset, therefore, can fully prevent the warpage of optical laminate.
And in comparative example 1, the thickness of the polarisation part of upside Polarizer is more than the thickness of the polarisation part of downside Polarizer, In comparative example 2, the thickness of the polarisation part of upside Polarizer is identical with the thickness of the polarisation part of downside Polarizer.Therefore, due to The distortional stress of the contraction of the polarisation part of upside Polarizer and the distortional stress of the contraction of the polarisation part due to downside Polarizer Can not fully it be offset in the inside of glass plate, it is impossible to fully prevent the warpage of optical laminate.
It should be noted that the diaphragm used in the present embodiment and comparative example under high temperature constant humidity environment also almost Do not shrink, therefore the warpage of optical laminate is had little to no effect.

Claims (6)

1. a kind of liquid crystal panel, it is characterised in that it has：
Liquid crystal cells,
Be arranged at the 1st surface side of the liquid crystal cells the 1st generally rectangular polarisation part and
The 2nd generally rectangular polarisation part of the 2nd surface side of the liquid crystal cells is arranged at,
The 1st polarisation part has the absorption axiss extended along its long side direction, and the 2nd polarisation part has along its short side The absorption axiss of direction extension,
The 1st polarisation part and the 2nd polarisation part arrange in a manner of the bearing of trend of mutual absorption axiss is orthogonal,
The thickness of the 2nd polarisation part is more than the thickness of the 1st polarisation part.
2. liquid crystal panel according to claim 1, wherein, thickness (T1) and the 2nd polarisation part of the 1st polarisation part Thickness (T2) ratio (T1/T2) be 1/10~1/2.
3. liquid crystal panel according to claim 1, wherein, thickness (T2) and the 1st polarisation part of the 2nd polarisation part Thickness (T1) difference (T2-T1) be more than 2 μm.
4. according to liquid crystal panel according to any one of claims 1 to 3, wherein, the 1st polarisation part and the 2nd polarisation At least any one polarisation part in part is laminated with diaphragm.
5. a kind of liquid crystal display device, it has liquid crystal panel according to any one of claims 1 to 4.
6. a kind of polarisation part group, it is characterised in that it has the 1st generally rectangular polarisation part and the generally rectangular the 2nd inclined Light part,
The 1st polarisation part has the absorption axiss extended along its long side direction, and the 2nd polarisation part has along its short side The absorption axiss of direction extension,
The 1st polarisation part and the 2nd polarisation part arrange in a manner of the bearing of trend of mutual absorption axiss is orthogonal,
The thickness of the 2nd polarisation part is more than the thickness of the 1st polarisation part.
CN201710851697.7A 2016-09-20 2017-09-20 Liquid crystal panel, liquid crystal display device and polarisation part group Pending CN107844002A (en)

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