CN206920638U - Polarization plates and image display device - Google Patents

Abstract

The utility model offer can suppress the polarization plates of the crackle due to temperature change in the notch of polarizer.Polarization plates (1A) of the present utility model possess membranaceous polarizer (7), concave notch (7C) is formed at the end (7e) of polarizer (7), when datum line L is defined as into the straight line that will be connected positioned at a pair of corners (7C1,7C2) at the both ends of notch (7C), datum line L is not orthogonal with the absorption axis A of polarizer 7, Wc is the width of the notch (7C) on the direction parallel with datum line L, W is the width of the whole polarizer (7) on the direction parallel with datum line L, and Wc/W is 0.05 less than 1.0.

Description

Polarization plates and image display device

Technical field

The present invention relates to the manufacture method of polarization plates, image display device and polarization plates.

Background technology

Polarization plates for form the optical component of the image display device such as LCD TV, organic EL TVs or smart mobile phone it One.Polarization plates possess membranaceous polarizer and the optical film overlapping with polarizer (such as diaphragm).Due to image display device Design on the reasons why, sometimes polarizer end formed notch (cut-out portion).For example, following patent texts 1 is offered to describe in inlet of the end of the polarizer formation notch as liquid crystal.

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2000-155325 publications

The content of the invention

Problems to be solved by the invention

Polarizer can expand or shrink with temperature change.The result of the research of the present inventor etc. specify that：Rise Because in the contraction of the polarizer with temperature change, crackle (crack) can be formed in notch.Especially because thermal shock is (anxious Acute temperature change), easily form crackle.

The present invention makes in view of the foregoing, it is therefore intended that, there is provided it can suppress in the notch of polarizer Because of the manufacture method of the polarization plates of the crackle in temperature change, the image display device comprising the polarization plates and polarization plates.

The solution used to solve the problem

The polarization plates of one aspect of the present invention possess membranaceous polarizer, and concave notch is formed at the end of polarizer Portion, by datum line L be defined as will positioned at the both ends of notch a pair of corners connect straight line when, datum line L not with polarizer Absorption axis A it is orthogonal, Wc be the direction parallel with datum line L on notch width, W is the side parallel with datum line L The width of upward whole polarizer, Wc/W are 0.05 less than 1.0.In other words, the absorption axiss of datum line L and polarizer Line A angulations θ is 0 ° less than 90 °.

In one aspect of the invention, polarizer can have first end and positioned at the opposite side of first end the Two ends, notch can be formed at first end, and notch can extend from first end to the second end, notch extension Direction E can not be parallel with the absorption axis A of polarizer.In other words, the absorption axiss of the direction E of notch extension and polarizer Line A angulations α can be more than 0 ° and be less than 90 °.

The manufacture method of polarization plates involved by one aspect of the present invention possesses：The process for making first layer stack, institute State first layer stack and include polarizer membrane and at least one optical film overlapping with polarizer membrane；First layer stack is added Work, the process for forming the second layered product with first end not orthogonal with the absorption axis A of polarizer membrane；And second The process that the first end of layered product forms concave notch, datum line L is defined as positioned at the both ends of notch The connection of a pair of corners straight line when, Wc is the width of the notch on the direction parallel with datum line L, and W is puts down with datum line L The width of whole polarizer on capable direction, Wc/W is adjusted to 0.05 less than 1.0.

In the manufacture method of polarization plates involved by one aspect of the present invention, the second layered product, which can have, is located at first The second end of the opposite side of end, notch can be made to extend from first end to the second end, and will can cut The direction E of oral area extension is adjusted to the not direction parallel with the absorption axis A.In other words, the side that notch can be extended It is adjusted to be more than 0 ° and for less than 90 ° to E and polarizer membrane (polarizer) absorption axis A angulations α.

Polarization plates involved by another aspect of the present invention possess membranaceous polarizer, and polarizer has first end and position The second end in the opposite side of first end, concave notch are formed at first end, and notch is from first end to Two ends extend, and the direction E of notch extension is not parallel with the absorption axis A of the polarizer, and Wc is parallel with first end Direction on notch width, W be the direction parallel with first end on whole polarizer width, Wc/W 0.05 Less than 1.0.In other words, for the polarization plates involved by another aspect of the present invention, the direction E of notch extension with partially The absorption axis A angulations α of piece of shaking is more than 0 ° and for less than 90 °.

The manufacture method of polarization plates involved by another aspect of the present invention possesses：The process for making first layer stack, institute State first layer stack and include polarizer membrane and at least one optical film overlapping with polarizer membrane；First layer stack is added Work, the process for making the second layered product, second layered product have first end and positioned at the opposite side of first end the Two ends；And the process in first end forming concave notch, notch is extended from first end to the second end, And the direction E that notch extends is adjusted to the direction parallel not with absorbing axis A, Wc is the direction parallel with first end On notch width, W be the direction parallel with first end on whole polarizer width, Wc/W is adjusted to 0.05 Less than 1.0.In other words, by the direction E of notch extension and angle formed by the absorption axis A of polarizer membrane (polarizer) Degree α is adjusted to be more than 0 ° and for less than 90 °.

In any one of aforementioned aspect of the present invention, can there are diaphragm or protective layer two surfaces of polarizer are closely sealed.

In any one of aforementioned aspect of the present invention, among two surfaces of polarizer, only can have a surface is closely sealed Diaphragm or protective layer.In any one of aforementioned aspect of the present invention, the deep of notch can make chamfering.

Involved image display device includes above-mentioned polarization plates in any one of aforementioned aspect of the present invention.

Invention effect

According to the present invention, there is provided the notch of polarizer can suppress the crackle due to temperature change polarization plates, The manufacture method of image display device and polarization plates comprising the polarization plates.

Brief description of the drawings

Fig. 1 is the schematic perspective view of the polarization plates involved by the first embodiment of the present invention.

(a) in Fig. 2 is the top view for the polarizer that the polarization plates shown in Fig. 1 possess, and (b) in Fig. 2 is in Fig. 2 (a) variation of the polarizer shown in.

Fig. 3 is the top view for the polarizer that the polarization plates shown in Fig. 1 possess, the enlarged drawing for being (a) in Fig. 2.

Fig. 4 is showing for the section of the image display device (liquid crystal display device) involved by the first embodiment of the present invention It is intended to.

Fig. 5 is the schematic perspective view of the polarization plates involved by second embodiment of the present invention.

Fig. 6 is showing for the section of the image display device (liquid crystal display device) involved by second embodiment of the present invention It is intended to.

(a) in Fig. 7 is the top view for the polarizer that the polarization plates involved by the other embodiment of the present invention possess, and is schemed (b) in 7 is the top view for the polarizer that the polarization plates involved by the other embodiment of the present invention possess, and (c) in Fig. 7 is The top view for the polarizer that polarization plates involved by the other embodiment of the present invention possess.

(a) in Fig. 8 is the top view for the polarizer that the polarization plates involved by the other embodiment of the present invention possess, and is schemed (b) in 8 is the top view for the polarizer that the polarization plates involved by the other embodiment of the present invention possess, and (c) in Fig. 8 is The top view for the polarizer that polarization plates involved by embodiments of the invention possess.

Fig. 9 is the top view for the polarizer that the polarization plates involved by the other embodiment of the present invention possess.

Figure 10 is the top view for the polarizer that the polarization plates involved by the other embodiment of the present invention possess.

Figure 11 is the schematic perspective view of the polarization plates involved by the comparative example of the present invention.

Figure 12 is the top view for the polarizer that the polarization plates shown in Figure 11 possess.

Figure 13 is the top view for the polarizer that the polarization plates involved by the part of the embodiment of the present invention possess.

Description of reference numerals

1A, 1Aa, 1Ab, 1B, 1Ba, 1Bb, 1C... polarization plates, the diaphragms of 3... the 3rd, the diaphragms of 5... first, 7... Polarizer, 7C... notch, 7C1,7C2... are located at a pair of corners, the end of 7e... polarizers at notch 7C both ends (first end), 7cr... crackles, the diaphragms of 9... second, 7Cd... notch 7C deep, 10... liquid crystal cells, 11... Adhesive layer, 13... mold release films, the second end of 17e... polarizers, 20A, 20B... liquid crystal panels, 30A, 30B... liquid crystals Showing device (image display device), L... datum lines, A... absorb axis, the direction of E... notch 7C extensions, S... by one The line segment of diagonal section 7C1,7C2 link, Sc... line segments S midpoint, θ ... datum lines L and absorption axis A angulations, The direction E of α ... notch C extensions and the absorption axis A angulations of polarizer.

Embodiment

Hereinafter, the suitable embodiment of the present invention is illustrated referring to the drawings.In the accompanying drawings, will to equal composition Element marks equal symbol.The present invention is not limited to following embodiments.X, Y and the Z shown in each figure refers to orthogonal 3 Individual reference axis.The direction that each reference axis represents is common in whole figures.

(first embodiment)

(a) based on Fig. 1, Fig. 2, Fig. 2 (b) and Fig. 3, are illustrated to first embodiment.First embodiment institute The polarization plates 1A being related to possesses membranaceous polarizer 7 and the multiple optical films overlapping with polarizer 7 (3,5,9,13).Polarizer 7 It is quadrangle with multiple optical films (3,5,9,13)." optical film " refers to that the membranaceous component for forming polarization plates (does not include inclined Shake piece itself.).Optical film can be in other words as layer or optical layer.Optical film is, for example, the meaning of diaphragm and mold release film. In one embodiment, multiple optical films (3,5,9,13) refer to the first diaphragm 5, the second diaphragm 9, the 3rd diaphragm 3 and taken off Mould film 13 (distance piece).That is, polarization plates 1A possesses polarizer 7, the first diaphragm 5, the second diaphragm 9, the 3rd diaphragm 3 and taken off Mould film 13.Polarization plates 1A is also equipped with the adhesive layer 11 between the second diaphragm 9 and mold release film 13.At one of polarizer 7 The first diaphragm 5 is overlapped with surface, the second diaphragm 9 is overlapped with another surface of polarizer 7.That is, in polarizer 7 Two surfaces closely sealed have diaphragm (protective layer).3rd diaphragm 3 is overlapped on the first diaphragm 5.That is, the first diaphragm 5 Between the diaphragm 3 of polarizer 7 and the 3rd.Mold release film 13 is overlapped in the second diaphragm 9 by adhesive layer 11.In other words, second Diaphragm 9 is between polarizer 7 and adhesive layer 11.

In the end (first end 7e) of polarizer 7 formed with concave notch 7C (concave cut-out portion).Notch 7C is on the stacked direction (Z-direction) of polarizer 7, optical film (3,5,9,13) and adhesive layer 11 Penetrate polarizer 7 and the whole of optical film (3,5,9,13) and adhesive layer 11.That is, in polarization plates 1A end face, formed it is common in Form the whole concave notch of polarization plates 1A polarizer 7, optical film (3,5,9,13) and adhesive layer 11.From stacked direction The notch 7C for the polarizer 7 that (Z-direction) is seen shape can be with the polarization plates 1A seen from stacked direction notch Shape it is same or similar.The shape of the polarization plates 1A seen from stacked direction notch can be considered as in terms of stacked direction The notch 7C of the polarizer 7 arrived shape.Hereinafter, sometimes not only by the notch 7C of polarizer 7 labeled as " notch 7C ", Also the notch of the polarization plates 1A comprising notch 7C is labeled as " notch 7C ".Notch 7C is, for example, rectangle.

Datum line L is defined as positioned at the straight line of a pair of corner 7C1 and 7C2 connections at notch 7C both ends.Benchmark A pair of corners 7C1 and 7C2 can be in other words as being connected in the direction vertical with above-mentioned stacked direction (Z-direction) by line L Straight line.Datum line L is not orthogonal with the absorption axis A of polarizer 7.In other words, notch 7C datum line L and polarizer 7 Axis A angulations θ is absorbed for 0 ° less than 90 °.Absorb axis A for example can in other words as with polarizer 7 The almost parallel straight line of the differently- oriented directivity of polyvinyl alcohol (PVA) molecule.Absorbing axis A for example can also be in other words as with polarizing The almost parallel straight line of the differently- oriented directivity of the pigment molecular (such as poly- iodine or organic dyestuff) of polyvinyl alcohol is adsorbed in piece 7.Can To say the multiple carbon atoms for being formed a PVA molecule by being bonded together along the covalent bond (C-C keys) for absorbing axis A.The opposing party Face, with absorbing axis A generally perpendicular directions, PVA molecules are each other by the crosslinking knot that by means of crosslinking agent (such as boric acid) Close and combine.In other words, with absorbing axis A generally perpendicular directions, hydroxyl possessed by each PVA molecules positioned at PVA with dividing Boric acid between son forms between hydrogen bond or oxygen-boron and is bonded (O-B keys), so as to which PVA molecules are cross-linked to each other.Formed along absorption axis A C-C keys along the crosslinking formed with absorbing axis A generally perpendicular directions than being firmly combined with.Therefore, it is almost parallel with absorption axis A Direction on polarizer 7 mechanical strength, than with absorb axis A generally perpendicular directions on polarizer 7 mechanical strength It is high.In other words, compared to the thermal contraction with absorbing the polarizer 7 in axis A generally perpendicular directions, with absorbing axis A substantially The thermal contraction of polarizer 7 on parallel direction is difficult to cause crackle.

Conventional polarization plates 1C as shown in FIG. 11 and 12 is such, in the case where datum line L is orthogonal with absorbing axis A (in the case that angle, θ is 90 °), in the direction parallel with datum line L, formed with the weak crosslinking knot of the C-C keys than PVA intramolecular Close.Therefore, in the case where datum line L is orthogonal with absorbing axis A, notch 7C deep (inner part) with datum line L substantially When parallel direction is shunk, crackle 7cr is easily formed in notch 7C deep.

On the other hand, in the first embodiment, datum line L is not orthogonal with the absorption axis A of polarizer 7.In other words, base Directrix L is with absorbing axis A angulations θ for 0 ° less than 90 °.Therefore, it is more intermolecular than PVA to be crosslinked what is be firmly combined with It the C-C keys of PVA intramoleculars, can improve the mechanical strength of the polarizer 7 on the direction parallel with datum line L.As a result, even if Notch 7C deep is shunk direction that be substantially parallel with datum line L, is also difficult to be formed in notch 7C deep Crackle 7cr.Particularly, (in the case that angle, θ is 0 °), polarizer is formed in the case where datum line L is parallel with absorbing axis A The C-C keys of 7 most PVA intramoleculars are formed along axis A is absorbed.Therefore, in feelings parallel with absorbing axis A datum line L Under condition, the mechanical strength of the polarizer 7 on the direction parallel with datum line L significantly improves, and significantly inhibits notch 7C crackle 7cr formation.

Datum line L is smaller with absorbing axis A angulations θ, is more difficult to form crackle 7cr in notch 7C.Angle, θ can Think more than 0 ° and less than 75 ° or more than 0 ° and less than 60 °.

Polarizer 7 is with the first end 7e formed with notch 7C and positioned at the second end of first end 7e opposite side Portion 17e.In the first embodiment, first end 7e and the second end 17e is linear, first end 7e and the second end 17e is parallel.Notch 7C extends from first end 7e to the second end 17e.Notch 7C extension direction E not with polarizer 7 Absorption axis A it is parallel.In other words, the direction E of notch 7C extensions is more than 0 ° and for 90 ° with absorbing axis A angulations α Below.In the first embodiment, angle [alpha] is 90 °.In the first embodiment, the direction E of notch 7C extensions is equal to otch Portion 7C length direction.That is, the direction E that notch 7C length direction extends along notch 7C.

Because the direction E of notch 7C extensions is not parallel with the absorption axis A of polarizer 7, therefore friendship more intermolecular than PVA It is coupled the C-C keys for closing firm PVA intramoleculars, improves the mechanical strength of the polarizer 7 on the direction vertical with direction E.Its As a result, even if notch 7C deep is shunk with direction E generally perpendicular directions, also it is difficult in notch 7C deep Form crackle 7cr.Direction E is bigger with absorbing axis A angulations α, is more difficult to form crackle 7cr in notch 7C.Particularly, In the case where direction E is vertical with absorbing axis A (in the case that angle [alpha] is 90 °), most PVA points of polarizer 7 are formed C-C keys in son are vertically formed relative to direction E.Therefore, in the case where direction E is vertical with absorbing axis A, with direction E The mechanical strength of polarizer 7 on vertical direction significantly improves, and significantly inhibits notch 7C crackle 7cr formation.

The width Wc of notch 7C on the direction parallel with datum line L for example can be 2mm less than 600mm, Or more than 5mm and below 30mm.Width Wc can be in other words as on the direction parallel with the end (first end 7e) of polarizer 7 Notch 7C width.The width W of whole polarizer 7 on the direction parallel with datum line L for example can be more than 30mm And below 600mm.The width W of whole polarizer 7 can be in other words as the whole polarization plates 1A on the direction parallel with datum line L Width.Width W can also be in other words as the width of the whole polarizer 7 on the direction parallel with first end 7e.Notch As long as 7C width Wc is for example less than the width W of whole polarizer 7.Notch 7C width Wc is more than 5mm and 30mm In the case of below, the width W (whole polarization plates 1A width) of whole polarizer 7 can be more than 20mm and below 160mm, Preferably greater than 25mm and below 130mm, more preferably higher than 30mm and below 100mm, further preferably greater than 30mm and Below 70mm (wherein, Wc ＜ W).The width W of notch 7C width Wc and whole polarizer 7 ratio Wc/W for more than 0.05 and Less than 1.0.Than Wc/W can be 0.08 less than 1.0,0.10 less than 1.0 or 0.13 less than 1.0, It is preferred that 0.15 less than 1.0 or 0.17 less than 1.0, more preferably 0.20 less than 1.0 or more than 0.22 And less than 1.0, further preferred 0.30 less than 1.0,0.33 less than 1.0 or 0.40 less than 1.0. Can also be more than 0.05 and less than 0.90, more than 0.05 and less than 0.80, more than 0.05 and less than 0.78 or 0.05 than Wc/W Above and less than 0.45.Can be in other words as notch 7C width Wc and whole polarization plates 1A width W ratio than Wc/W.Than In the case that value Wc/W is in above range, easily suppress notch 7C crackle.Its reason is as follows.Notch 7C width Wc Width W more than whole polarizer 7 is small, and due to the contraction of the whole polarizer 7 with temperature change, easier generation makes otch The power that portion 7C width Wc expands, is easily cracked in notch 7C.I.e. Wc/W is smaller, and easier produced in notch 7C is split Line.On the other hand, Wc/W bigger (the width W of whole polarizer 7 is smaller), with the contraction of the whole polarizer 7 of temperature change Amount is more reduced.That is, the width W of whole polarizer 7 is smaller, and the absolute value of the whole width W of polarizer 7 variable quantity is more reduced. Because the amount of contraction of the whole polarizer 7 with temperature change is reduced, expand notch 7C width Wc so as to be difficult to produce Power, easily suppress notch 7C crackle.

The length Dc of notch 7C on the direction vertical with datum line L for example can be more than 1mm and below 30mm.It is long Spending Dc can be in other words as the depth of the notch 7C on the direction vertical with datum line L.On the direction vertical with datum line L The length D of whole polarizer 7 for example can be more than 30mm and below 600mm.In other words the length D of whole polarizer 7 can be For the length of the whole polarization plates 1A on the direction vertical with datum line L.Polarization plates 1A thickness for example can be more than 10 μm And less than 1200 μm, more than 10 μm and less than 500 μm, more than 10 μm and less than 300 μm or more than 10 μm and less than 200 μm.

Polarization plates 1A manufacture method at least possesses laminating step and procedure of processing.In laminating step, by the band of strip The polarizer membrane of shape and multiple optical films of the banding of strip are bonded to make layered product (first layer stack).The banding of strip Polarizer membrane refers to process, shape before polarizer 7.The absorption axis of polarizer membrane can be with the polarizer 7 after processing, shaping Absorption axis A it is identical.Multiple optical films of the banding of strip refer to process, shape before optical film (3,5,9,13).Connecing In the procedure of processing got off, first layer stack is processed, makes multiple layered products (the with desired size and shape Two layered products).Second layered product has the not absorption with polarizer membrane (polarizer 7) in the same manner as above-mentioned polarization plates 1A The first end 7e orthogonal axis A and the second end 17e positioned at first end 7e opposite side.In procedure of processing, for example, First layer stack can be cut off, formed not with absorbing axis A just in direction not orthogonal with the absorption axis A of polarizer membrane The first end of friendship.In procedure of processing, such as first layer stack can be cut off to make the second layered product by using cutlery. In procedure of processing, for example, the second layered product can be made by the Punching Technology of first layer stack.In procedure of processing, For example, first layer stack can be cut off to make the second layered product by using laser.Laser for example can be CO₂Laser or standard Molecular laser.In procedure of processing, such as cut-out, Punching Technology and the cutting using laser of above-mentioned cutlery can be applied in combination Break to make the second layered product.First layer stack can also be processed by using above-mentioned processing method and by first cascade The size adjusting of body be more than defined size after, the end of first layer stack is cut with milling cutter, ground to make the Two layered products.

In procedure of processing, for example, can be by Punching Technology or the cut-out using cutlery or laser, so as to the The first end 7e of two layered products forms concave notch 7C.In the case of forming notch 7C in procedure of processing, make to cut Oral area 7C extends from first end 7e to the second end 17e, and by the direction E that notch 7C extends be adjusted to not with absorption axiss Direction parallel line A.After the second layered product formed with notch 7C has been made in procedure of processing, end processing can be carried out Step.In the procedure of processing of end, such as end mill(ing) cutter (end mill) can be used to the second layered product comprising notch 7C End face cut, ground.End mill(ing) cutter is one kind of the milling cutter of machining.End mill(ing) cutter is for example with positioned at rotating axle The sword of almost parallel side, the end face of the second layered product comprising notch 7C is cut, ground.As a result, comprising The end face of notch 7C the second layered product is processed smoothly.By using the end mill(ing) cutter, the second stacking can be made with the short time Body formed is the polarization plates 1A with desired shape and size.That is, the productivity ratio of polarization plates 1A improves.Can be in procedure of processing In first layer stack is punched out in a larger amount than ever and makes the second layered product, in ensuing end procedure of processing The end face of the second layered product is cut with end mill(ing) cutter, ground.As a result, in the procedure of processing of end, from the second layered product The edge (margin) of the end of removal is reduced, and the generation of the foreign matter such as lapping rejects in suppression end procedure of processing, suppresses foreign matter It is mixed into product (polarization plates 1A).

Notch 7C can not be formed in procedure of processing, but in the end procedure of processing of then procedure of processing, The first end 7e of second layered product forms concave notch 7C.Notch 7C situation is formed in the procedure of processing of end Under, notch 7C is extended from first end 7e to the second end 17e, and the direction E that notch 7C extends is adjusted to The parallel direction not with absorbing axis A.In the procedure of processing of end, such as can be by the end irradiation to the second layered product State laser and by part or all of cut-out of end, so as to form notch 7C in the second layered product.Can also be by using The end procedure of processing of above-mentioned end mill(ing) cutter, notch 7C is formed in the second layered product.Also, in above-mentioned procedure of processing or end In any one of procedure of processing, Wc/W is adjusted to 0.05 less than 1.0.

The absorption axiss of polarizer 7 contained in the second layered product have been held in procedure of processing and end procedure of processing Line A direction.Thus, for example, as described above, the direction of punching or the cut-out by adjusting first layer stack, second is laminated The first end 7e of body is adjusted to 0 ° less than 90 ° with absorbing axis A angulations, so as to by datum line L with Axis A angulations θ is absorbed freely to control at 0 ° less than 90 ° of scope.In addition, as described above, in the second layer , also can be by direction E with absorbing axis by adjusting notch 7C direction when the first end 7e of stack forms notch 7C A angulations α is freely controlled in the scope more than 0 ° and less than 90 °.As described above, phases of the datum line L with absorbing axis A To position relationship, notch 7C position is formed by the direction of punching or the cut-out of first layer stack and in the second layered product Put to control.Direction E and the relative position relation for absorbing axis A, by the position that notch 7C is formed in the second layered product And notch 7C direction controls.The direction itself for absorbing axis A of polarizer membrane (polarizer 7), by procedure of processing And the direction of the stretching of the PVA film carried out before the procedure of processing of end and stretching ratio are adjusted, controlled.

Polarizer 7 can be the membranaceous polyvinyl alcohol resin (PVA by the process making such as stretching, dyeing and be crosslinked Film).The details of polarizer 7 is as follows.

For example, first, PVA film is stretched along single shaft direction or biaxially oriented.Have along the polarizer 7 of single shaft direction stretching The high tendency of dichroic ratio.Dyeing liquor is then used after the stretch, utilizes iodine, dichroism pigment (poly- iodine) or organic dyestuff pair PVA film is dyed.Dyeing liquor can include boric acid, zinc sulfate or zinc chloride.PVA film can be washed before dyeing. By washing, dirt and anti-blocking agent are removed from the surface of PVA film.In addition, by washing, PVA film can be swelled, as a result easily Suppress uneven (the uneven dyeing) of dyeing.In order to be crosslinked, by the solution of the PVA film crosslinking agent after dyeing (for example, boron The aqueous solution of acid) handled.After processing based on crosslinking agent, PVA film is washed, is then dried.More than Step, it can obtain polarizer 7.For polyvinyl alcohol resin, by the way that polyvinyl acetate system resin saponification can be obtained.Poly- second Vinyl acetate system resin can be for example the polyvinyl acetate or vinyl acetate of the homopolymer as vinyl acetate and its The copolymer (such as vinyl-vinyl acetate copolymer) of its monomer.For other monomers with vinyl acetate copolymerization, except Can also be unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class or the propylene with ammonium beyond ethene Amide-type.Polyvinyl alcohol resin can be modified with aldehydes.Modified polyvinyl alcohol resin for example can be part Polyvinyl alcohol of acetalization, polyvinyl acetal or polyvinyl butyral resin.Polyvinyl alcohol resin can be the de- of polyvinyl alcohol The polyenoid system alignment films such as the desalination acid treatment thing of water process thing or polyvinyl chloride.It can be dyed before the stretching, can also be Stretched in dyeing liquor.The length of the polarizer 7 of drawn for example can be 3~7 times of the length before stretching.

The thickness of polarizer 7 for example can be more than 1 μm and less than 50 μm, more than 1 μm and less than 10 μm, more than 1 μm and 8 Below μm, more than 1 μm and less than 7 μm or more than 4 μm and less than 30 μm.Polarizer 7 is thinner, more suppresses with temperature change The contraction of itself of polarizer 7, so as to suppress the change of the size of itself of polarizer 7.As a result, stress is difficult to act on polarizer 7, easily suppress the crackle of polarizer 7.

As long as the first diaphragm 5 and the second thermoplastic resin of the diaphragm 9 with translucency, can be optical lens Bright thermoplastic resin.The resin for forming the first diaphragm 5 and the second diaphragm 9 for example can be chain polyolefin-based resins, Cyclic olefin polymer system resin (COP systems resin), cellulose esters system resin, polyester based resin, polycarbonate-based resin, (first Base) acrylic resin, polystyrene resin or their mixture or copolymer.The composition of first diaphragm 5 can be with The composition of second diaphragm 9 is identical.The composition of first diaphragm 5 can also be different from the composition of the second diaphragm 9.

Chain polyolefin-based resins for example can be the homopolymerization of chain olefin as polyvinyl resin or acrylic resin Thing.Chain polyolefin-based resins can also be the copolymer formed by more than two kinds chain olefins.

Cyclic olefin polymer system resin (cyclic polyolefin hydrocarbon system resin) for example can be that the open loop of cyclic olefin is (common) poly- The addition polymer of compound or cyclic olefin.Cyclic olefin polymer system resin for example can be cyclic olefin and chain olefin Copolymer (such as random copolymer).The chain olefin for forming copolymer for example can be ethene or propylene.Cyclic olefin gathers Compound system resin can be graft polymerization obtained from being modified with unsaturated carboxylic acid or derivatives thereof to above-mentioned polymer Thing or their hydride.Cyclic olefin polymer system resin for example can be to have used ENB or polycyclic ENB It is the norbornene resin of the norborneol alkene monomer such as monomer.

Cellulose esters system resin for example can be cellulosic triacetate (cellulose triacetate (TAC)), cellulose diethyl Acid esters, cellulose tripropionate or cellulose dipropionate.Their copolymer can be used.One of hydroxyl can also be used Divide the cellulose esters system resin modified by other substituents.

The polyester based resin in addition to cellulose esters system resin can also be used.Polyester based resin for example can be polynary carboxylic The condensation polymer of acid or derivatives thereof and polyalcohol.Polybasic carboxylic acid or derivatives thereof can be dicarboxylic acids or derivatives thereof.Polynary carboxylic Acid or derivatives thereof for example can be terephthalic acid (TPA), M-phthalic acid, dimethyl terephthalate (DMT) or naphthalene dicarboxylic acids diformazan Ester.Polyhydric alcohols such as can be dihydric alcohol.Polyhydric alcohols such as can be ethylene glycol, propane diols, butanediol, neopentyl glycol or ring Hexane dimethanol.

Polyester based resin for example can be polyethylene terephthalate, polybutylene terephthalate (PBT), poly- naphthalene two Formic acid glycol ester, PBN, PTT, polytrimethylene naphthalate, polycyclic Hexane dimethanol terephthalate or poly- cyclohexanedimethanol naphthalate.

Polycarbonate-based resin be polymerized unit (monomer) by carbonate group the polymer with reference to obtained from.Makrolon It is that resin can be the modified polycarbonate with the polymer backbone through modification, or copolymerization polycarbonate.

(methyl) acrylic resin for example can be poly- (methyl) acrylate (such as polymethyl methacrylate (PMMA))；Methyl methacrylate-(methyl) acrylic copolymer；Methyl methacrylate-(methyl) acrylic ester copolymer Thing；Methyl methacrylate-acrylate-(methyl) acrylic copolymer；(methyl) acrylate-styrene copolymer (such as MS resins)；Methyl methacrylate is with having the copolymer of the compound of alicyclic alkyl (for example, methyl methacrylate Ester-cyclohexyl methacrylate copolymer, methyl methacrylate-(methyl) acrylic acid norbornyl ester copolymer etc.).

At least one optical film can among clamping a pair of optical films (the first diaphragm 5 and the second diaphragm 9) of polarizer 7 To include cellulose triacetate (TAC).Among a pair of the optical films (the first diaphragm 5 and the second diaphragm 9) for clamping polarizer 7 At least one optical film can include cyclic olefin polymer system resin (COP systems resin).Clamp a pair of optical films of polarizer 7 At least one optical film can include polymethyl methacrylate (PMMA) among (the first diaphragm 5 and the second diaphragm 9). Can be that both a pair of optical films (the first diaphragm 5 and the second diaphragm 9) for clamping polarizer 7 include tri acetic acid fiber Element.Can also be that a film among a pair of the optical films (the first diaphragm 5 and the second diaphragm 9) for clamping polarizer 7 includes Cellulose triacetate, and another film among clamping a pair of optical films of polarizer 7 includes cyclic olefin polymer.Can also It is that a film among a pair of the optical films (the first diaphragm 5 and the second diaphragm 9) for clamping polarizer 7 includes tri acetic acid fiber Element, and another film among clamping a pair of optical films of polarizer 7 includes polymethyl methacrylate.Can also clamp partially The film among a pair of optical films (the first diaphragm 5 and the second diaphragm 9) of piece 7 that shakes includes cyclic olefin polymer system tree Fat, and another film among clamping a pair of optical films of polarizer 7 includes polymethyl methacrylate.In polarizer 7 by one In the case of being clamped to optical film (the first diaphragm 5 and the second diaphragm 9), optical film (diaphragm) and polarizer 7 are closely sealed, suppression System is with the expansion or shrinkage of the polarizer 7 of temperature change, therefore the crackle of polarizer 7 is difficult to produce.For example, in polarizer 7 In the case of being clamped by the first diaphragm 5 formed by TAC and the second diaphragm 9 formed by COP systems resin, polarizer 7 Crackle is difficult to produce.

First diaphragm 5 or the second diaphragm 9 can be included selected from lubricant, plasticizer, dispersant, heat stabilizer, purple At least one of ultraviolet absorbers, infrared absorbent, antistatic additive and antioxidant additive.

The thickness of first diaphragm 5 for example can be more than 5 μm and less than 90 μm, more than 5 μm and less than 80 μm or 5 μm Above and less than 50 μm.The thickness of second diaphragm 9 can also be such as more than 5 μm and less than 90 μm, more than 5 μm and 80 μm with Under or more than 5 μm and less than 50 μm.

First diaphragm 5 or the second diaphragm 9 can be to have optical function as phase difference film or brightness raising film Film.For example, by forming liquid crystal layer etc. by the film stretching formed by above-mentioned thermoplastic resin or on the film, can be assigned The phase difference film of any position phase difference is given.

First diaphragm 5 can fit in polarizer 7 by adhesive linkage.Second diaphragm 9 can also paste by adhesive linkage Together in polarizer 7.Adhesive linkage can include the water system bonding agents such as polyvinyl alcohol, can also consolidate comprising active energy beam described later The property changed resin.

Active energy ray-curable resin is by irradiating active energy beam the resin that solidifies.Active-energy Ray for example can be ultraviolet, visible ray, electron ray or X ray.Active energy ray-curable resin can be ultraviolet Line curable resin.

Active energy ray-curable resin can be a kind of resin, can also include various kinds of resin.For example, active-energy Ray-curable resin can include the curability compound of cationically polymerizable or free-radical polymerised curability chemical combination Thing.The cation that active energy ray-curable resin can include the curing reaction for being used to trigger above-mentioned curability compound gathers Close initiator or radical polymerization initiator.

The curability compound of cationically polymerizable for example can be that (intramolecular has at least one ring to epoxy compound The compound of epoxide) or oxetanes based compound (intramolecular has the compound of at least one oxetanes ring).From For example can be that (intramolecular has at least one (first to (methyl) acrylic compounds by the curability compound of base polymerism Base) acryloxy compound).Free-radical polymerised curability compound can also be with free-radical polymerised pair The vinyl compound of key.

Active energy ray-curable resin can include cationic polymerization accelerator, ion capturing agent, resist as needed Oxidant, chain-transferring agent, tackifier, thermoplastic resin, filler, flowing regulator, plasticizer, defoamer, antistatic additive, stream Flat agent or solvent etc..

Adhesive layer 11 can for example include acrylic pressure sensitive type bonding agent, rubber series pressure sensitive bonding agent, silicon-type The pressure sensitive bonding agent such as pressure sensitive bonding agent or carbamate system pressure sensitive bonding agent.The thickness of adhesive layer 11 for example can be with For more than 2 μm and less than 500 μm, more than 2 μm and less than 200 μm or more than 2 μm and less than 50 μm.

The resin for forming the 3rd diaphragm 3 can be with arranging as the resin for forming the first diaphragm 5 or the second diaphragm 9 The above-mentioned resin enumerated is identical.The thickness of 3rd diaphragm 3 for example can be more than 5 μm and less than 200 μm.

The resin for forming mold release film 13 can be with enumerating as the resin for forming the first diaphragm 5 or the second diaphragm 9 The above-mentioned resin gone out is identical.The thickness of mold release film 13 for example can be more than 5 μm and less than 200 μm.

Image display device involved in the present invention is such as can be liquid crystal display device or organic EL display.Example Such as, as shown in figure 4, the liquid crystal display device 30A involved by first embodiment possesses liquid crystal cells 10, with liquid crystal cells 10 The overlapping polarization plates 1Aa (the first polarization plates) of one surface (first surface) and another surface (with liquid crystal cells 10 Two surfaces) overlapping another polarization plates 1Ab (the second polarization plates).Second surface can be in other words as the back side of first surface.Fig. 4 Shown polarization plates 1Aa and 1Ab be not in addition to possessing mold release film 13 and the 3rd diaphragm 3 this point, with the polarization shown in Fig. 1 Plate 1A all sames.Polarization plates 1Aa (the first polarization plates) is attached at the first surface of liquid crystal cells 10 by adhesive layer 11.Polarization plates 1Aa (the first polarization plates) has the adhesive layer 11 overlapping with the first surface of liquid crystal cells 10, overlapping with adhesive layer 11 second Diaphragm 9, the polarizer 7 overlapping with the second diaphragm 9 and first diaphragm 5 overlapping with polarizer 7.Another polarization plates 1Ab (the second polarization plates) is attached at the second surface of liquid crystal cells 10 by adhesive layer 11.Another polarization plates 1Ab (the second polarizations Plate) there is the adhesive layer 11 overlapping with the second surface of liquid crystal cells 10, second diaphragm 9 overlapping with adhesive layer 11 and the The overlapping polarizer 7 of two diaphragms 9 and first diaphragm 5 overlapping with polarizer 7.Liquid crystal cells 10 and a pair of polarization plates 1Aa and 1Ab forms liquid crystal panel 20A.Liquid crystal panel 20A forms liquid crystal with backlight (planar light source device) and other components Showing device 30A.Backlight and other components omit in Fig. 4.

(second embodiment)

The second embodiment of the present invention shown in Fig. 5 and Fig. 6 is illustrated below.In this second embodiment, It is by the mechanism same with the situation of first embodiment, can suppresses splitting with temperature change in the notch of polarizer Line.Hereinafter, distinctive item in second embodiment (difference of first embodiment and second embodiment) is said It is bright.For in following unaccounted item, second embodiment and first embodiment are common.

Polarization plates 1B involved by second embodiment possesses the 3rd diaphragm 3, the first diaphragm 5, polarizer 7, bonding Layer 11 and mold release film 13.In this second embodiment, among two surfaces of polarizer 7, there is the first protection a surface is closely sealed Film 5, the 3rd diaphragm 3 is overlapped with the first diaphragm 5.On another surface of polarizer 7, directly it is closely sealed have an adhesive layer 11 and It is not the second diaphragm 9.That is, adhesive layer 11 is clamped by polarizer 7 and mold release film 13.As described above, involved by second embodiment And polarization plates 1B do not possess the second diaphragm 9 this put it is different from the polarization plates 1A involved by first embodiment.In other words, The one side of polarization plates 1B possesseds polarizer 7 only involved by second embodiment is protected by the first diaphragm 5 (protective layer), The another side of polarizer 7 is not protected film (protective layer) protection.Generally, the polarization protected with two surfaces by diaphragm (protective layer) Piece is compared, and the polarizer protected for only one side by diaphragm (protective layer), is easily formed due to temperature change in notch Crackle.But in this second embodiment, in the same manner as first embodiment, because datum line L is not with absorbing axis A just Hand over, therefore notch 7C crackle 7cr formation can be suppressed.It is in addition, same with first embodiment in this second embodiment Ground, because the direction E of notch 7C extensions is parallel not with absorbing axis A, therefore easily suppress notch 7C crackle 7cr shape Into.

As shown in fig. 6, the liquid crystal display device 30B involved by second embodiment possesses liquid crystal cells 10 and liquid crystal list The overlapping polarization plates 1Ba (the first polarization plates) of a surface (first surface) of member 10 and another with liquid crystal cells 10 The overlapping another polarization plates 1Bb (the second polarization plates) in surface (second surface).Show polarization plates 1Ba and 1Bb except not having in Fig. 6 Beyond standby mold release film 13 and the 3rd diaphragm 3 this point, with the polarization plates 1B all sames shown in Fig. 5.(first is inclined by polarization plates 1Ba Vibration plate) first surface of liquid crystal cells 10 is attached at by adhesive layer 11.Polarization plates 1Ba (the first polarization plates) has and liquid crystal list The overlapping adhesive layer 11 of first surface, the polarizer 7 overlapping with adhesive layer 11 and overlapping with polarizer 7 first of member 10 Diaphragm 5.Another polarization plates 1Bb (the second polarization plates) is attached at the second surface of liquid crystal cells 10 by adhesive layer 11.It is another Polarization plates 1Bb (the second polarization plates) has the adhesive layer 11 overlapping with the second surface of liquid crystal cells 10, overlapping with adhesive layer 11 Polarizer 7 and first diaphragm 5 overlapping with polarizer 7.Liquid crystal cells 10 and a pair of polarization plates 1Ba and 1Bb form liquid Crystal panel 20B.Liquid crystal panel 20B forms liquid crystal display device 30B with backlight (planar light source device) and other components.Backlight And other components omit in figure 6.

(other embodiment)

The first embodiment and second embodiment of the present invention are illustrated above, but the present invention is not limited to State embodiment.

As long as example, by positioned at the datum line L not absorptions with polarizer of a pair of corners at the both ends of each notch connection Axis A is orthogonal, it is possible to multiple notch are formed in polarization plates.

Polarization plates and the respective shape of notch can be variously-shaped according to purposes.For example, as shown in (a) in Fig. 7, The width of notch 7C on the direction parallel with datum line L can be more vertical than with datum line L direction on notch depth Degree is big.As shown in (b) in Fig. 7, notch 7C shape can be semicircle.As shown in (c) in Fig. 7, notch 7C shape Shape can be triangle.Notch 7C shape can also be other polygons in addition to quadrangle and triangle.In Fig. 7 (a), the 7 respective shape of polarizer shown in (c) in (b) and Fig. 7 in Fig. 7, which can be considered as, possesses respective polarizer 7 The shape of polarization plates.What each polarizer 7 shown in (c) in (a) in other words, in the figure 7, (b) in Fig. 7 and Fig. 7 was formed Notch 7C shape can be considered as the shape of the notch formed in the polarization plates for possessing each polarizer 7.

As shown in (a) in Fig. 8, the outer rim (first end 7e and the second end 17e) of polarizer 7 can be circle.Such as Shown in (b) in Fig. 8, chamfered section (chamfered part) 7C3 and chamfering can be formed in notch 7C deep (corner) Portion 7C4.Corner 7C1 and corner 7C2 positioned at notch 7C both ends can also make chamfering.Positioned at notch 7C both ends In the case that corner 7C1 and corner 7C2 makes chamfering, datum line L can be in other words as by corner 7C1 and corner 7C2 connections Straight line.Positioned at external angle (outside corner) CR1, external angle CR2, external angle CR3 and the external angle of the outer rim of polarizer 7 CR4 can also make chamfering.Above-mentioned chamfering can for example be come by using the notch of end mill(ing) cutter and cutting, the grinding of outer rim Realize.The 7 respective shape of polarizer shown in (c) in (a) in Fig. 8, (b) in Fig. 8 and Fig. 8, which can be considered as, to be possessed each Polarizer 7 polarization plates shape.In other words, shown in (c) in (a) in fig. 8, (b) in Fig. 8 and Fig. 8 it is each partially The shape for the notch 7C that the piece 7 that shakes is formed, the shape of the notch formed in the polarization plates for possessing each polarizer 7 can be considered as. As shown in figure 13, chamfered section 7C3 can be formed in the notch 7C of triangle deep (innermost portion).Inclined shown in Figure 13 The shape for the notch 7C that the piece 7 that shakes is formed, the shape of the notch formed in the polarization plates for possessing polarizer 7 can be considered as.Such as Shown in (b) and Figure 13 in Fig. 8, by the way that notch 7C deep is made into chamfering, so as to easily suppress notch 7C crackle. Chamfered section 7C3 and chamfered section 7C4 shown in (b) in Fig. 8 can be in other words as the curved deeps (corner) of notch.Figure Chamfered section 7C3 shown in 13 can also be in other words as the curved deep (corner) of notch.Notch 7C's is curved The radius of curvature in deep (corner) is bigger, the easier crackle for suppressing notch 7C.For example, the curved by making notch 7C The radius of curvature in deep (corner) be more than 0.07mm, can easily suppress notch 7C crackle.Notch C's is curved The radius of curvature in deep (corner) for example can be more than 0.07mm and below 30mm or more than 0.07mm and below 10mm, excellent Elect more than 0.09mm as and below 30mm or more than 0.09mm and below 10mm.

The part that can be the outer rim of polarizer is that the remainder of linear, polarizer outer rim is curve-like. The part that can be the first end of polarizer is that the remainder of linear, polarizer first end is curve-like.Partially The first end of piece of shaking can be formed only by the straight line (more than one side) of one or more.The first end of polarization plates can also Only formed by curve.The part that can be the second end of polarizer is the remainder of linear, polarizer the second end It is divided into curve-like.The second end of polarizer can be formed only by the straight line (more than one side) of one or more.Polarization plates The second end can also be formed only by curve.Polarizer and the respective shape of polarization plates can be polygon in addition to quadrangle Shape.Polarizer and the respective shape of polarization plates for example can be ellipse.The respective shape of each optical film (3,5,9,13) can be with It is roughly the same with the shape of polarizer 7.

As shown in figure 9, the first end 7e formed with notch 7C can not be parallel with the second end 17e.Such as Fig. 9 institutes Show, in first end 7e, deep 7Cd (bottom) not parallel with the second end 17e and notch 7C is linear situation Under, " notch 7C bearing of trend E " can be defined as with halving and inciting somebody to action the line segment S for linking a pair of corners 7C1,7C2 The direction for the straight line parallel that notch 7C linear deep 7Cd is halved.The feelings of chamfering are made in a pair of corners 7C1,7C2 Under condition, line segment S can be the line segment for linking both a pair of corners 7C1,7C2.As shown in Figure 10, in first end 7e not with Two end 17e are parallel and notch 7C deep 7Cd is in the case of curvilinear, and " the direction E " of notch 7C extensions can be with It is defined as the direction of straight line parallel being connected with by notch 7C deep 7Cd (most deep) and line segment S midpoint Sc.It is assumed that Curvilinear notch 7C deep 7Cd branch into it is multiple in the case of, " notch 7C prolong direction E " can be defined as with will The respective direction with the line segment S midpoint Sc straight line parallels connected in notch 7C multiple deeps (most deep).With notch Direction E corresponding to 7C multiple deeps (most deep) difference is parallel not with absorbing axis A, so as to suppress the crackle in each deep.

Species, quantity and the order of stacking of optical film to forming polarization plates do not limit.For example, second embodiment The variation of involved polarization plates can possess the 3rd diaphragm 3, polarizer 7, the second diaphragm 9, adhesive layer 11 and the demoulding Film 13.That is, a surface among two surfaces of polarizer 7, can there are the 3rd diaphragm 3, rather than the first protection with closely sealed Film 5.There can be the second diaphragm 9 another surface of polarizer 7 is closely sealed, can be in the second diaphragm 9 by adhesive layer 11 Overlap with mold release film 13.As described above, the variation of the polarization plates involved by second embodiment can not possess the first guarantor Cuticula 5 and possess different from the polarization plates 1B involved by second embodiment on the second diaphragm 9 this aspect.

The number for the optical film that polarization plates possess can be 1.For example, the polarization plates 1A shown in Fig. 1 variation can Not possess both the first diaphragm 5 and the second diaphragm 9.For example, the polarization plates 1Aa (the first polarization plates) shown in Fig. 4 And among polarization plates 1b (the second polarization plates), any one or both can not possess the first diaphragm 5 and/or the second diaphragm 9。

Polarization plates 1A can not possess one or both of the 3rd diaphragm 3 and mold release film 13.For example, the 3rd diaphragm 3 can peel off in the manufacturing process of image display device and remove from polarization plates 1A.That is, the 3rd diaphragm 3 can be temporary transient Diaphragm.Mold release film 13 can also be peeled off in the manufacturing process of image display device and removed from polarization plates 1A.

Thinner protective layer can also be directly overlapped in polarizer to replace the first diaphragm 5 or the second diaphragm 9.Example Such as, the film for including active energy ray-curable resin, and the photograph for passing through active energy beam are formed on the surface of polarizer When penetrating curing of coating, then the protective layer thinner than conventional diaphragm can be directly formed on the surface of polarizer.In other words, may be used To form thin protective layer in itself by the active energy ray-curable resin used in polarizer is bonding with diaphragm.

Mold release film can also be configured at the two sides of polarization plates by adhesive layer.

The optical film that polarization plates possess can be reflection type polarizing film, the film with anti-dazzle function, with anti-surface reflection function Film, reflectance coating, semipermeable reflection film, compensation film for angular field of view, optical compensating layer, touch sensor layer, antistatic layer or stain-proofing layer.

Polarization plates can be also equipped with hard conating.For example, in the variation of polarization plates 1A shown in Fig. 1, the first diaphragm 5 can So that between hard conating and polarizer 7, hard conating can be between the first diaphragm 5 and the 3rd diaphragm 3.In this feelings Under condition, the first diaphragm 5 can include cellulose triacetate.

Hard conating is, for example, the layer being made up of acrylic resin film that fine concaveconvex shape is provided with surface.It is hard to apply Layer can for example be formed by the film comprising organic fine particles or inorganic particles.It can use and press on the film with concave-convex The method (such as embossing etc.) of the roller of shape.Can also use formed do not contain the film of organic fine particles or inorganic particles after, The method that the film is pressed on to the roller with concaveconvex shape.Inorganic particles for example can be silica, colloidal silica, Aluminum oxide, alumina sol, aluminosilicate (Aluminosilicate), alumina silica composite oxides, kaolin, Talcum, mica, calcium carbonate, calcium phosphate etc..In addition, organic fine particles (resin particle) for example can be cross linked polyacrylate particulate, Methyl methacrylate/styrene copolymer resin particulate, crosslinked polystyrene beads, crosslinked polymethylmethacrylaparticles are micro- Grain, silicone resin fine-particles, medlin particulate etc..For making the scattered Binder Composition of inorganic particles or organic fine particles can be with Selected from the material in high rigidity (hard to apply).Binder Composition for example can be uv curing resin, heat cure Property resin, electron ray curing resin etc..From viewpoints such as productivity ratio, hardness, as Binder Composition, preferably using purple Outside line curable resin.The thickness of hard conating for example can be more than 2 μm and less than 30 μm or more than 3 μm and less than 30 μm.

[embodiment]

Hereinafter, by embodiment, the present invention will be described in more detail, but the present invention is not limited to these embodiments.

(embodiment 1)

Make the adhesive layer 11 by polarizer membrane (polarizer 7 before cut-out), 4 optical films (3,5,9,13) and pressure sensitive The first layer stack of the oblong-shaped of composition.First layer stack possess mold release film 13, the adhesive layer 11 overlapping with mold release film 13, with It is the second overlapping diaphragm 9 of adhesive layer 11, the polarizer membrane (7) overlapping with the second diaphragm 9, overlapping with polarizer membrane (7) First diaphragm 5 and threeth diaphragm 3 overlapping with the first diaphragm 5.As polarizer membrane (7), using drawn and The membranaceous polyvinyl alcohol of dyeing.As the first diaphragm 5, cellulose triacetate (TAC) film is used.As the second diaphragm 9, Use the film being made up of cyclic olefin polymer system resin (COP systems resin).As the 3rd diaphragm 3, PET protection film is used. As mold release film 13, PET barrier films are used.The thickness of mold release film 13 is 38 μm.The thickness of adhesive layer 11 is 20 μm.Second diaphragm 9 thickness is 13 μm.The thickness of polarizer 7 is 7 μm.The thickness of first diaphragm 5 is 25 μm.The thickness of 3rd diaphragm 3 is 58μm。

Above-mentioned first layer stack is cut off with cutting machine, the length for making horizontal edge is 170mm, the length of longitudinal edge is 100mm The second layered product.When being cut off to first layer stack, by adjusting the cutting direction of first layer stack, so as to by the second layer The horizontal edge (first end) of stack is adjusted to the angle described in table 1 below with the absorption axis A angulations θ of polarizer 7. It should be noted that the absorption axis A of polarizer 7 is parallel with the bearing of trend of polarizer membrane (7).

The absorption of the second layered product is set to be fixed on workbench.CO is irradiated to the outer rim through the second fixed layered product₂Laser, by This forms concave notch in the horizontal edge (first end) of the second layered product.Process more than, obtains the polarization of embodiment 1 Plate.CO₂The output of laser is set as 20W.CO₂The oscillation wavelength of laser is 10.4 μm.

The shape of obtained polarization plates is identical with the shape of the polarizer 7 shown in (c) in Fig. 8.That is, (c) institute in Fig. 8 The polarizer 7 shown is the polarization plates possessed polarizer made by above-mentioned step.It is formed at the first end of polarizer 7 7e (horizontal edge of the second layered product) notch 7C's is generally shaped like semicircle.Datum line L is defined as positioned at notch 7C Both ends corner 7C1 and corner 7C2 connection straight line when, datum line L with absorb axis A angulations be equal to above-mentioned angle Spend θ.The width Wc of notch 7C on the direction parallel with datum line L is 20mm.That is, the distance of corner 7C1 and corner 7C2 is 20mm.The depth of notch 7C on the direction vertical with datum line L is 10mm.Of polarizer 7 formed with notch 7C One end 7e width W is 150mm.That is, the length (the transverse width W of polarization plates) of the horizontal edge of polarization plates is 150mm.Polarization plates The length (polarization plates longitudinally wide) of longitudinal edge be 80mm.Wc/W is 20mm/150mm, as 0.13.

Mold release film 13 is peeled off from the adhesive layer 11 of polarization plates, polarization plates are fitted in into glass plate by adhesive layer 11.Enter And the 3rd diaphragm 3 is peeled off from polarization plates.By such step, prepare by glass plate and the polarization for fitting in glass plate Plate shape into sample.Using the sample, heat cycles experiment is carried out.In heat cycles experiment, repeat by following steps 1 and Then the circulation that the step 2 of step 1 is formed.

Step 1：The step of sample is heated 30 minutes in 85 DEG C of atmosphere.

Step 2：The step of sample is cooled down 30 minutes in -40 DEG C of atmosphere.

Each moment of the above-mentioned circulation of the defined number shown in table 1 below is repeated, with observation by light microscope shape Into in the notch 7C of sample possessed polarizer 7.

(embodiment 2~8, comparative example 1)

The absorption axis A angulations θ of the horizontal edge (first end) of second layered product and polarizer 7 is adjusted to following Angle described in table 1, in addition, by method similarly to Example 1, embodiment 2~8 and comparative example 1 is made respectively Each polarization plates.That is, in the making of embodiment 2~8 and each polarization plates of comparative example 1, by datum line L with absorbing axis A angulations θ is adjusted to the angle described in table 1 below.In the same manner as the situation of embodiment 1, implementation has been used The heat cycles of example 2~8 and each polarization plates of comparative example 1 are tested.

The result that embodiment 1~8 and the respective heat cycles of comparative example 1 are tested is shown in table 1 below." A " in table Refer to there is no crackle in the notch 7C of polarizer 7." B " refers to form small crackle in the notch 7C of polarizer 7. " C " refers to form the crackle bigger than the situation of " B " in the notch 7C of polarizer 7." B " described in the row of comparative example 1 Refer to form the crackle that length is about 1mm." B " described in the row of embodiment 1 refers to that it is splitting for about 10mm to form length Line.

[table 1]

(embodiment 9,10, comparative example 2)

Except change notch 7C shape and angle, θ this point in addition to, by method similarly to Example 1, make respectively Make embodiment 9,10 and the respective polarization plates of comparative example 2.

The shape of the respective polarizer of embodiment 9,10 and comparative example 2 is identical with the shape of the polarizer 7 shown in Figure 13. That is, in the case of embodiment 9,10 and comparative example 2, it is formed at the first end 7e's (horizontal edge of the second layered product) of polarizer 7 Notch 7C's is generally triangular in shape.Shown in the shape and Figure 13 of embodiment 9,10 and the respective polarization plates of comparative example 2 Polarizer 7 shape it is identical.In the case of embodiment 9,10 and comparative example 2, angle, θ is adjusted to described in table 2 below Value.

In the case of embodiment 9,10 and comparative example 2, the width Wc of the notch 7C on the direction parallel with datum line L is 20mm.That is, corner 7C1 and corner 7C2 distance is 20mm.In the case of embodiment 9,10 and comparative example 2, hung down with datum line L The length Dc (depth) of notch 7C on straight direction is 10mm.In the case of embodiment 9,10 and comparative example 2, in notch 7C deep (corner) forms chamfered section 7C3.Notch 7C chamfered section 7C3 radius of curvature is 0.1mm.Embodiment 9,10 And in the case of comparative example 2, the first end 7e of the polarizer 7 formed with notch 7C width W is 150mm.That is, polarization plates The length (the transverse width W of polarization plates) of horizontal edge be 150mm.In the case of embodiment 9,10 and comparative example 2, polarization plates are indulged The length (polarization plates longitudinally wide) on side is 80mm.Wc/W is 20mm/150mm, as 0.13.

In the same manner as the situation of embodiment 1, used embodiment 9,10 and the respective polarization plates of comparative example 2 plus Thermal cycling test.The result that embodiment 9,10 and the respective heat cycles of comparative example 2 are tested is shown in table 2 below.

[table 2]

(embodiment 11~17)

In the making of the respective polarization plates of embodiment 11~17, angle, θ is adjusted to 45 °.

The shape of the respective polarizer of embodiment 11~17 is identical with the shape of the polarizer 7 shown in Figure 13.That is, implement In the case of example 11~17, the first end 7e (horizontal edge of the second layered product) of polarizer 7 notch 7C shape is formed at It is have a generally triangular shape.The shape of the respective polarization plates of embodiment 11~17 is identical with the shape of the polarizer 7 shown in Figure 13.

In the case of embodiment 11~17, the first end 7e of the polarizer 7 formed with notch 7C width W is adjusted For the value shown in Table 3 below.Width W can be in other words as the length (transverse widths of polarization plates) of the horizontal edge of polarization plates.

In the case of embodiment 11~17, the width Wc of the notch 7C on the direction parallel with datum line L is 20mm. That is, corner 7C1 and corner 7C2 distance is 20mm.In the case of embodiment 11~17, Wc/W is the value shown in Table 3 below.It is real In the case of applying example 11~17, the length Dc (depth) of the notch 7C on the direction vertical with datum line L is 10mm.Embodiment In the case of 11~17, chamfered section 7C3 is formed in notch 7C deep (corner).Notch 7C chamfered section 7C3 curvature Radius is 0.1mm.In the case of embodiment 11~17, the length (polarization plates longitudinally wide) of the longitudinal edge of polarization plates is 70mm.

In addition to above item, pass through the respective polarization plates of method similarly to Example 1, respectively making embodiment 11~17.

In the same manner as the situation of embodiment 1, used the heat cycles of the respective polarization plates of embodiment 11~17 Experiment.In the respective heat cycles experiment of embodiment 11~17, a surface of polarizer 7 by the second diaphragm 9 (by The film that COP systems resin is formed) covering, another surface of polarizer 7 is covered by the first diaphragm 5 (TAC film).By embodiment 11 The result of~17 respective heat cycles experiment is shown in Table 3 below.

(embodiment 18~20)

In the making of the first layer stack of embodiment 18~20, without using the first diaphragm 5 (TAC film), and by the 3rd Diaphragm 3 (PET protection film) is directly overlapped in polarizer 7.

In the making of the respective polarization plates of embodiment 18~20, angle, θ is adjusted to 45 °.

The shape of the respective polarizer of embodiment 18~20 is identical with the shape of the polarizer 7 shown in Figure 13.That is, implement In the case of example 18~20, the first end 7e (horizontal edge of the second layered product) of polarizer 7 notch 7C shape is formed at It is have a generally triangular shape.The shape of the respective polarization plates of embodiment 18~20 is identical with the shape of the polarizer 7 shown in Figure 13.

In the case of embodiment 18~20, the first end 7e of the polarizer 7 formed with notch 7C width W is adjusted For the value shown in Table 3 below.Width W can be in other words as the length (transverse widths of polarization plates) of the horizontal edge of polarization plates.

In the case of embodiment 18~20, the width Wc of the notch 7C on the direction parallel with datum line L is 20mm. That is, corner 7C1 and corner 7C2 distance is 20mm.In the case of embodiment 18~20, Wc/W is the value shown in Table 3 below.It is real In the case of applying example 18~20, the length Dc (depth) of the notch 7C on the direction vertical with datum line L is 10mm.Embodiment In the case of 18~20, chamfered section 7C3 is formed in notch 7C deep (corner).Notch 7C chamfered section 7C3 curvature Radius is 0.1mm.In the case of embodiment 18~20, the length (polarization plates longitudinally wide) of the longitudinal edge of polarization plates is 70mm.

In addition to above item, pass through the respective polarization plates of method similarly to Example 1, respectively making embodiment 18~20.

In the same manner as the situation of embodiment 1, used the heat cycles of the respective polarization plates of embodiment 18~20 Experiment.As described above, the respective polarization plates of embodiment 18~20 do not possess the first diaphragm 5 (TAC film).Therefore, implementing In the respective heat cycles experiment of example 18~20, a surface of polarizer 7 (is made up of by the second diaphragm 9 COP systems resin Film) covering, and another surface of polarizer 7 not by the first diaphragm 5 (TAC film) cover and expose.By embodiment 18~ The result of 20 respective heat cycles experiment is shown in Table 3 below.

[table 3]

(embodiment 21~23, comparative example 3)

In the making of embodiment 21~23 and the respective polarization plates of comparative example 3, angle, θ is adjusted to 45 °.

The shape of the respective polarizer of embodiment 21~23 and comparative example 3, except the transverse width W of whole polarizer 7 It is identical with the shape of the polarizer 7 shown in Fig. 3 beyond longer than the longitudinally wide D of whole polarizer 7.

Width of the transverse width W of whole polarizer 7 in other words as the whole polarizer 7 on the direction parallel with datum line L Degree.The transverse width W of whole polarizer 7 can also be in other words as the whole polarizer 7 on the direction parallel with first end 7e Width.In the case of embodiment 21~23 and comparative example 3, the width of the whole polarizer 7 on the direction parallel with datum line L It is 170mm to spend W.The longitudinally wide D of whole polarizer 7 is in other words as the whole polarizer 7 on the direction vertical with datum line L Width.In the case of embodiment 21~23 and comparative example 3, the width of the whole polarizer 7 on the direction vertical with datum line L It is 100mm to spend D.

As shown in figure 3, in any situation in embodiment 21~23 and comparative example 3, in the first end 7e of polarizer 7 The shape for the notch 7C that (horizontal edge of the second layered product) is formed is rectangle.In embodiment 21~23 and the feelings of comparative example 3 In condition, the width Wc of the notch 7C on the direction parallel with datum line L is the value shown in table 4 below.In the He of embodiment 21~23 In the case of comparative example 3, Wc/W is the value shown in table 4 below.In the case of embodiment 21~23 and comparative example 3, with datum line L The length Dc (depth) of notch 7C on vertical direction is 5mm.

In addition to above item, by method similarly to Example 1, embodiment 21~23 and comparative example 3 are made respectively Respective polarization plates.

In the same manner as the situation of embodiment 1, used embodiment 21~23 and the respective polarization plates of comparative example 3 Heat cycles are tested.In embodiment 21~23 and the experiment of the respective heat cycles of comparative example 3, a surface of polarizer 7 Covered by the second diaphragm 9 (film being made up of COP systems resin), another surface of polarizer 7 is by (the TAC of the first diaphragm 5 Film) covering.The result that embodiment 21~23 and the respective heat cycles of comparative example 3 are tested is shown in table 4 below.

[table 4]

Industrial applicability

Polarization plates involved in the present invention are suitable as forming liquid crystal such as being attached at liquid crystal cells or organic el device The optical component of the image display devices such as TV, organic EL TVs or smart mobile phone.

Claims (30)

1. a kind of polarization plates, it possesses membranaceous polarizer,

Concave notch is formed at the end of the polarizer,

When datum line L is defined as into the straight line that will be connected positioned at a pair of corners at the both ends of the notch, the datum line L is not It is orthogonal with the absorption axis A of the polarizer,

Wc is the width of the notch on the direction parallel with the datum line L,

W is the width of the whole polarizer on the direction parallel with the datum line L,

Wc/W is 0.05 less than 1.0.

2. polarization plates according to claim 1, wherein, the polarizer has first end and positioned at the first end Opposite side the second end,

The notch is formed at the first end,

The notch extends from the first end to the second end,

The direction E of the notch extension is not parallel with the absorption axis A of the polarizer.

3. a kind of polarization plates, it possesses membranaceous polarizer,

The polarizer has first end and the second end positioned at the opposite side of the first end,

Concave notch is formed at the first end,

The notch extends from the first end to the second end,

The direction E of the notch extension is not parallel with the absorption axis A of polarizer,

Wc is the width of the notch on the direction parallel with the first end,

W is the width of the whole polarizer on the direction parallel with the first end,

Wc/W is 0.05 less than 1.0.

4. according to polarization plates according to any one of claims 1 to 3, wherein, there is guarantor two surfaces of the polarizer are closely sealed Cuticula or protective layer.

5. according to polarization plates according to any one of claims 1 to 3, wherein, among two surfaces of the polarizer, only one Individual surface is closely sealed diaphragm or protective layer.

6. according to polarization plates according to any one of claims 1 to 3, wherein, form chamfered section in the deep of the notch.

7. polarization plates according to claim 6, wherein, the radius of curvature of the chamfered section for more than 0.07mm and 30mm with Under.

8. polarization plates according to claim 1 or 2, wherein, the datum line L and the polarizer absorption axis A institutes Into angle, θ for 0 ° less than 90 °.

9. polarization plates according to claim 3, wherein, datum line L is defined as positioned at the both ends of the notch During the straight line of a pair of corners connection, the absorption axis A angulations θ of the datum line L and the polarizer for more than 0 ° and Less than 90 °.

10. polarization plates according to claim 1 or 2, wherein, the datum line L and the polarizer absorption axis A institutes Into angle, θ be more than 0 ° and less than 75 °.

11. polarization plates according to claim 3, wherein, datum line L is defined as positioned at the both ends of the notch During the straight line of a pair of corners connection, the absorption axis A angulations θ of the datum line L and the polarizer for more than 0 ° and Less than 75 °.

12. polarization plates according to claim 1, wherein, the polarizer has first end and positioned at the first end The second end of the opposite side in portion,

The notch is formed at the first end,

The notch extends from the first end to the second end,

The direction E of the notch extension and absorption axis A angulations α of the polarizer is more than 0 ° and less than 90 °.

13. the polarization plates according to Claims 2 or 3, wherein, the direction E and the polarizer of the notch extension It is more than 0 ° and less than 90 ° to absorb axis A angulations α.

14. polarization plates according to claim 1 or 2, wherein, the Wc/W is 0.10 less than 1.0.

15. polarization plates according to claim 3, wherein, the Wc/W is 0.10 less than 1.0.

16. polarization plates according to claim 1 or 2, wherein, the otch on the direction parallel with the datum line L The width Wc in portion be 2mm less than 600mm,

The width W of the whole polarizer on the direction parallel with the datum line L is more than 30mm and below 600mm,

The width Wc of the notch is less than the width W of the whole polarizer.

17. polarization plates according to claim 3, wherein, the notch on the direction parallel with the first end Width Wc be 2mm less than 600mm,

The width W of the whole polarizer on the direction parallel with the first end is more than 30mm and below 600mm,

The width Wc of the notch is less than the width W of the whole polarizer.

18. polarization plates according to claim 1 or 2, wherein, the otch on the direction vertical with the datum line L The length Dc in portion is more than 1mm and below 30mm.

19. polarization plates according to claim 3, wherein, datum line L is defined as positioned at the both ends of the notch During the straight line of a pair of corners connection, the length Dc of the notch on the direction vertical with the datum line L for more than 1mm and Below 30mm.

20. according to polarization plates according to any one of claims 1 to 3, wherein, the thickness of the polarizer for more than 1 μm and Less than 10 μm.

21. polarization plates according to claim 4, wherein, closely sealed diaphragm or protection on two surfaces of the polarizer In layer, at least one diaphragm or protective layer include cellulose triacetate.

22. polarization plates according to claim 4, wherein, closely sealed diaphragm or protection on two surfaces of the polarizer In layer, at least one diaphragm or protective layer include cyclic olefin polymer system resin.

23. polarization plates according to claim 4, wherein, closely sealed diaphragm or protection on two surfaces of the polarizer In layer, at least one diaphragm or protective layer include (methyl) acrylic resin.

24. polarization plates according to claim 1 or 2, wherein, the datum line L and the polarizer absorption axis A institutes Into angle, θ be more than 0 ° and less than 30 °.

25. polarization plates according to claim 3, wherein, datum line L is defined as positioned at the both ends of the notch During the straight line of a pair of corners connection, the absorption axis A angulations θ of the datum line L and the polarizer for more than 0 ° and Less than 30 °.

26. polarization plates according to claim 1 or 2, wherein, the Wc/W is more than 0.10 and less than 0.80.

27. polarization plates according to claim 3, wherein, the Wc/W is more than 0.10 and less than 0.80.

28. polarization plates according to claim 1 or 2, wherein, the Wc/W is 0.40 less than 1.0.

29. polarization plates according to claim 3, wherein, the Wc/W is 0.40 less than 1.0.

30. a kind of image display device, it includes the polarization plates any one of claim 1~29.