CN107102389B - Polarization plates and image display device - Google Patents
Polarization plates and image display device Download PDFInfo
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- CN107102389B CN107102389B CN201710082514.XA CN201710082514A CN107102389B CN 107102389 B CN107102389 B CN 107102389B CN 201710082514 A CN201710082514 A CN 201710082514A CN 107102389 B CN107102389 B CN 107102389B
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- polarization plates
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- polarization
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/22—Gases
- H01S3/223—Gases the active gas being polyatomic, i.e. containing two or more atoms
- H01S3/225—Gases the active gas being polyatomic, i.e. containing two or more atoms comprising an excimer or exciplex
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides the polarization plates that light can be inhibited to leak and image display device.Polarization plates (1) have membranaceous polarizing film (7) and are overlapped in multiple optical films (3,5,9,11,13) of polarizing film (7).Verticality (a/b) through the hole (21) of polarization plates (7) is 0.00 less than 0.32.The width (W) in the polarization elimination portion (23) around hole (21) is 0.00 μm less than 32 μm.
Description
Technical field
The present invention relates to polarization plates and image display devices.
Background technology
Polarization plates be constitute the image display devices such as LCD TV, organic EL TVs or smart mobile phone optical component it
One.As described in Patent Document 1 below, polarization plates have membranaceous polarizing film and are overlapped in the optical film of polarizing film and (such as protect
Film).
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2002-303730 bulletins
The common image display device such as TV or smart mobile phone has the picture of quadrangle form mostly, therefore is equipped on
The previous polarization plates of image display device are also quadrangle, whole consistently to have polarization property.On the other hand, special
Image display device has specific shape according to their purposes, and the previous polarization plates for being equipped on the device are also special shape
Shape.For example, sometimes the rotary shaft for pointer must be formed on the image display device used in smartwatch or onboard instruments
Perforative hole.Therefore, it is necessary to through hole is also formed in the polarization plates for be equipped on image display device.Due to the use of polarization plates
On the way, purpose is diversified, therefore can imagine according to purposes, purpose and must form the various of through hole in polarization plates
Situation.
However, in the punch process (punch press process) carried out by using punch and punch die or using drill bit progress
The previous mechanical means such as machining comes in the case where forming through hole in polarization plates, and there are through holes to tilt, is penetrating through
The case where cracking is formed near hole.The inclination and cracking of through hole can damage the polarization property near through hole, and draw
Play light leakage." light leakage " refers to the phenomenon that direction of vibration light parallel with the absorption axiss of polarizing film penetrates polarization plates.
In replacement mechanical means as described above by using CO2The laser processing (such as hot-working) of the progress such as laser
Come in the case where forming through hole in polarization plates, there is also through holes to tilt, the case where cracking is formed near through hole.
Moreover, according to laser processing, then the part for forming through hole is heated by laser, therefore polarization property is easy the change because of polarizing film
The property learned goes bad and is compromised.The discoloration or melting of the rotten e.g. polarizing film chemically of polarizing film.Hereinafter, work(will be polarized
The part that can be damaged by chemically rotten of polarizing film is referred to as " the polarization elimination portion " of polarization plates.It is wider to polarize elimination portion,
The then easier leak light in image display device.According to the result of study of the present inventors：Even if using wavelength ratio
CO2In the case of the processing (such as ablation) that the short excimer laser of laser carries out, it is also possible to occur and through hole
Form associated above-mentioned technical problem.
Invention content
Present invention has been made in view of the above circumstances, its purpose is to provide can inhibit light leak polarization plates and
Image display device including the polarization plates.
Solution for solving the problem
The polarization plates of one aspect of the present invention have membranaceous polarizing film and are overlapped in multiple optical films of polarizing film, pass through
The verticality for wearing the hole of polarization plates is 0.00 less than 0.32, the width in the polarization elimination portion around hole be 0.00 μm with
Above and it is less than 32 μm." optical film " refers to the membranaceous component for constituting polarization plates (other than polarizing film itself).For example, optics
Film contains the meaning of protective film and mold release film.
Can be that the quantity of the cracking around hole is 0 or more and 3 or less in per unit length 1mm.
Can be that the length of the cracking around hole is 0 μm less than 50 μm.
The optical film that can be at least one party in a pair of of the optical film for clip polarizing film includes triacetyl cellulose.
The optical film that can be at least one party in a pair of of the optical film for clip polarizing film includes cyclic olefin polymer.
The optical film that can be at least one party in a pair of of the optical film for clip polarizing film includes poly-methyl methacrylate
Ester.
The image display device of one aspect of the present invention includes above-mentioned polarization plates.
Invention effect
According to the present invention, the polarization plates that light can be inhibited to leak and the image display device including the polarization plates are provided.
Description of the drawings
Fig. 1 is the stereogram of the polarization plates of one embodiment of the present invention.
Fig. 2 be the polarization plates in the II-II lines direction in Fig. 1 to regarding face (polarization plates it is vertical with the surface of polarization plates
Section) schematic diagram.
Fig. 3 is the enlarged drawing of the region III (around the perforative hole of polarization plates) in the surface of the polarization plates in Fig. 1.
Fig. 4 is the schematic diagram of the luminous point of excimer laser and the straight line at the center along the luminous point across excimer laser
Excimer laser intensity distribution.
Fig. 5 is the schematic diagram in the section of the image display device (liquid crystal display device) of one embodiment of the present invention.
(a) in Fig. 6 is the schematic side elevation of the configuration of polarization plates when indicating to check the light leakage of polarization plates, Fig. 6
In (b) be the schematic plan configured shown in (a) in Fig. 6.
Reference sign：
1,1a, 1b, 1s ... polarization plates, 3 ... third protective films, 5 ... first protective films, 7 ... polarizing films, 9 ... second protections
Film, 10 ... liquid crystal cells, 11 ... adhesive layers, 13 ... mold release films, 20 ... liquid crystal display panels, 21 ... through holes, 23 ... polarization elimination portions,
25 ... crackings, the width in 30 ... liquid crystal display devices (image display device), W ... polarization elimination portion, 1 ... cracking length.
Specific implementation mode
Hereinafter, being explained with reference to the preferred embodiments of the present invention.In the accompanying drawings, to identical inscape mark
Note identical reference numeral.The present invention is not limited to following embodiments.X, Y and Z shown in each figure refer to orthogonal
Three reference axis.Direction shown in each reference axis is common in all figures.
As shown in Figure 1, the polarization plates 1 of present embodiment have membranaceous polarizing film 7 and are overlapped in multiple light of polarizing film 7
Learn film (3,5,9,13).Polarizing film 7 and multiple optical films (3,5,9,13) are quadrangles.Multiple optical films (3,5,9,13)
Refer to the first protective film 5, the second protective film 9, third protective film 3 and mold release film 13 (separator).That is, polarization plates 1 have partially
It shakes piece 7, the first protective film 5, the second protective film 9, third protective film 3 and mold release film 13.Polarization plates 1 also have protects positioned at second
Adhesive layer 11 between cuticula 9 and mold release film 13.The first protective film 5 is overlapped on the surface of a side of polarizing film 7, in polarizing film
The surface of 7 another party overlaps with the second protective film 9.Third protective film 3 is overlapped in the first protective film 5.That is, the first protective film
5 between polarizing film 7 and third protective film 3.Mold release film 13 is overlapped in the second protective film 9 across adhesive layer 11.In other words,
Second protective film 9 is between polarizing film 7 and adhesive layer 11.
The surface (first surface) of one side of polarization plates 1 is made of third protective film 3.The surface of another party of polarization plates 1
(second surface) is made of mold release film 13.The sections of polarization plates 1 shown in Fig. 2 and polarizing film 7 and each optical film (3,5,9,
13) vertical.In other words, the section of polarization plates 1 shown in Fig. 2 is vertical with Y-axis, parallel with the faces ZX.In other words, shown in Fig. 2 inclined
The section of vibration plate 1 is vertical with the light-receiving surface of polarization plates 1.
It is formed through the hole (through hole 21) of polarization plates 1 in polarization plates 1.(XY is flat on the surface of through hole 21 and polarization plates 1
Face) it is substantially vertical, it is substantially parallel with the stacking direction (Z-direction) of polarizing film 7 and multiple optical films (3,5,9,13).With it is inclined
The shape of through hole 21 on the parallel direction (X/Y plane direction) in the surface of vibration plate 1 is for example round as shown in Figure 3.Through hole
21 inner wall can not also be smooth.
The verticality of through hole 21 is 0.00 less than 0.32.Hereinafter, illustrating verticality based on Fig. 2.
The section of polarization plates 1 shown in Fig. 2 is vertical with the surface of polarization plates 1 and includes the center of circular through hole 21
Axis.By positioned at the surface (first surface) of a side of polarization plates 1 and with comparable first optical film in the edge of through hole 21 (such as
Third protective film 3) end be defined as first end 3e.By positioned at the surface of another party of polarization plates 1 (second surface) and with
The end of comparable second optical film (such as mold release film 13) in edge of through hole 21 is defined as the second end 13e.First end
3e and the second end 13e is respectively positioned on the same section vertical with the surface of polarization plates 1.It will be parallel with the surface of polarization plates 1
Direction (X/Y plane direction) on, the distance definition of first end 3e and the second end 13e be a.By the thickness of polarization plates 1
(such as average value of thickness) is defined as b.Verticality is defined as a/b.Verticality can also be defined as a '/b.A ' be with partially
On the parallel direction in the surface of vibration plate 1, first end 3e ' is at a distance from the second end 13e '.First end 3e ' refers to being located at
Another first end of the opposite side of above-mentioned first end 3e.The second end 13e ' refers to being located at above-mentioned the second end 13e
Opposite side another the second end.A/b can be equal with a '/b.A/b can also be different from a '/b.In a/b and a '/b is different
In the case of, a/b and a '/b are 0.00 less than 0.32.As long as meeting above-mentioned definition, so that it may in polarization plates 1
A and b is measured in arbitrary section, and a/b is calculated according to the respective measured values of a and b.In the arbitrary multiple of polarization plates 1
In the case of calculating verticality a/b in section, the maximum value in the multiple verticality a/b calculated be 0.00 less than
0.32.A, a ', b and b ' are for example measured i.e. based on the observation for using light microscope to carry out the sections of polarization plates 1
It can.
By making the verticality a/b of through hole 21 be less than 0.32, to which light leakage is inhibited.In the vertical of through hole 21
In the case that degree a/b is 0.32 or more, on the section (end face) of the polarizing film 7 exposed in through hole 21, because of the refraction etc. of light
Caused light leakage becomes notable.The verticality a/b of through hole 21 can be 0.00 or more and 0.30 or less, 0.00 or more and
0.28 or less, 0.00 or more and 0.27 or less, 0.05 or more and 0.30 or less, 0.05 or more and 0.28 or less or 0.05 or more
And 0.27 or less.Verticality a/b is smaller, then easier inhibition light leakage.Therefore, most preferably a is zero.That is, most preferably verticality
A/b is zero.Verticality a/b is zero to mean that the surface (first surface and second surface) of through hole 21 and polarization plates 1 is complete
Ground is vertical.
The thickness b of polarization plates 1 for example can be 10 μm or more and 1200 μm or less, 10 μm or more and 500 μm or less, 10 μm
Above and 300 μm or less or 10 μm or more and 200 μm or less.First end is with the second end distance a or a ' as long as meeting a/
B is 0.00 less than 0.32, so that it may to be arbitrary value.
In the case where the opening portion at the both ends of through hole 21 is a pair of of concentric circles, verticality can also be defined as it is following that
Sample.The internal diameter (diameter) of one end (opening portion) of through hole 21 is defined as d1.By the other end (opening portion) of through hole 21
Internal diameter (diameter) is defined as d2.At this point, the verticality of through hole 21 can be defined as the absolute value of (d1-d2)/2b.This definition with
Above-mentioned definition (a/b) not contradiction.That is, the absolute value of (d1-d2)/2 is equal with a or a '.D1 and d2 is for example based on using light
The observation that microscope carries out two surfaces of polarization plates 1 is learned to measure.
It is formed with polarization elimination portion 23 sometimes around through hole 21.Polarize formation of the elimination portion 23 in through hole 21
It is generated due to chemically rotten of polarizing film 7 or the optical film (3,5,9,13) for being overlapped in polarizing film 7 in journey.Polarize elimination portion
23 can form along first surface (such as surface of third protective film 3).Polarizing elimination portion 23 can also be along in the
Formed to the second surface (such as surface of mold release film 13) of the back side on one surface.Polarize elimination portion 23 can with polarization plates 1
The vertical direction (Z-direction) in surface on located continuously or discontinuously exist.That is, polarization elimination portion 23 can have from polarization
The depth that the surface of plate 1 is risen.In other words, polarization elimination portion 23 can be dimensionally distributed.For example, polarization elimination portion 23 can be packet
Enclose the part of the whole tubular of through hole 21.Polarization elimination portion 23 is a factor of light leakage.Polarize the light in elimination portion 23
Leak the variation of the chemical composition due to polarizing film 7 or the optical film (3,5,9,13) for being overlapped in polarizing film 7.For example, because of structure
Cause to polarize elimination portion 23 at the confusion of the orientation of the polyvinyl alcohol or pigment molecular (compound for including iodine) of polarizing film 7
Light leakage.
The width W in the polarization elimination portion 23 around the through hole 21 of polarization plates 1 is 0.00 μm less than 32 μm.Such as
Shown in Fig. 3, the width W in polarization elimination portion 23 refers to the width in the polarization elimination portion 23 on the direction parallel with the surface of polarization plates 1
Degree.Here, " surfaces of polarization plates 1 " can be first surface (such as surface of third protective film 3), can also be in first
The second surface (such as surface of mold release film 13) of the back side on surface.Can be, in the side vertical with the first surface of polarization plates 1
The width W in the polarization elimination portion 23 looked up is 0.00 μm less than 32 μm, and in the second surface with polarization plates 1
The width W in the polarization elimination portion 23 observed on vertical direction is 0.00 μm less than 32 μm.Polarize elimination portion 23
Width W can also rename as making the width in the polarization elimination portion 23 on X/Y plane direction.Polarization plates 1 are substantially transparent, therefore can be from
First surface side (surface side of third protective film 3) observation is eliminated positioned at the polarization of second surface side (surface side of mold release film 13)
Portion 23.That is, the first light may not be formed in the polarization elimination portion 23 that first surface side (surface side of third protective film 3) is observed
Learn film (third protective film 3).Alternatively, it is also possible to be located at the inside of polarization plates 1 from the first surface side or second surface side
Polarize elimination portion 23.First surface side (third protective film 3 can be located at from second surface side (surface side of mold release film 13)
Surface side) polarization elimination portion 23.That is, in the polarization elimination portion 23 that second surface side (surface side of mold release film 13) is observed
The second optical film (mold release film 13) may not be formed in.Polarization plates 1 are substantially transparent, therefore in the side vertical with the surface of polarization plates 1
When observing the surface of polarization plates 1 in (Z-direction), the polarization elimination portion 23 of distributed in three dimensions can be seen with the state of coincidence
It arrives.That is, the polarization elimination portion 23 of distributed in three dimensions can be on the surface (X/Y plane) as polarization plates 1 around the through hole 21
Two-dimensional orthographic projection (such as surrounding ring of through hole 21) and be observed.
Width W by polarizing elimination portion 23 is less than 32 μm, to which light leakage is inhibited.Width in polarization elimination portion 23
In the case that degree W is 32 μm or more, the light leakage in polarization elimination portion 23 becomes notable.The width in the polarization elimination portion 23 of polarization plates 1
It can be 0.00 μm or more and 20 μm or less, 0.00 μm or more and 19 μm or less or 0.00 μm or more and 18 μm or less to spend W.Partially
Shake elimination portion 23 width W it is smaller, then easier inhibition light leakage.Therefore, the width W in most preferably polarization elimination portion 23 is 0.00
μm.That is, polarization elimination portion 23 is most preferably not present.As long as the width W in the polarization elimination portion 23 around through hole 21 is in
0.00 μm less than in the range of 32 μm, then can not also fix.The unfixed situations of width W in polarization elimination portion 23
Under, the maximum value of the width W in polarization elimination portion 23 is less than 32 μm.
It is formed with cracking 25 sometimes around through hole 21.Cracking 25 can along first surface (third protective film 3
Surface) formed.Cracking 25 can also be along second surface (surface of mold release film 13) landform of the back side in first surface
At.Cracking 25 can continuously or non-continuously be formed on the direction (Z-direction) vertical with the surface of polarization plates 1.That is, cracking
25 can have the depth from the surface of polarization plates 1.In other words, cracking 25 can be distributed in three dimensions.
The quantity of cracking 25 around the through hole 21 of polarization plates 1 can per unit length 1mm be 0 or more and 3 with
Under." unit length 1mm " refers to the straight line or curve that and length parallel with the edge of through hole 21 is 1mm.For example, in through hole
In the case that 21 shape is circle, unit length refers to the circular arc parallel with the circular edge of through hole 21." the number of cracking 25
Amount " refer in the cracking 25 observed on the direction (Z-direction) vertical with the surface of polarization plates 1 with unit length 1mm phases
The number of the cracking 25 of friendship.The cracking 25 observed in first surface (such as surface of third protective film 3) can be counted
Number.Can also to the cracking 25 observed in the second surface (such as surface of mold release film 13) of the back side in first surface into
Row counts.Can be, the cracking 25 that the first surface of polarization plates 1 is observed quantity per unit length 1mm be 0 or more and
3 hereinafter, and the quantity of cracking 25 observed in the second surface of polarization plates 1 per unit length 1mm be 0 or more and 3 with
Under.Polarization plates 1 are substantially transparent, therefore can be located at second surface from first surface side (surface side of third protective film 3)
The cracking 25 of side (surface side of mold release film 13).That is, the cracking observed in first surface side (surface side of third protective film 3)
25 may not be formed in the first optical film (third protective film 3).Alternatively, it is also possible to the position from first surface side or second surface side
Cracking 25 in the inside of polarization plates 1.First surface side can be located at from second surface side (surface side of mold release film 13)
The cracking 25 of (surface side of third protective film 3).That is, the cracking 25 observed in second surface side (surface side of mold release film 13)
The second optical film (mold release film 13) may not be formed in.Polarization plates 1 are substantially transparent, therefore in the side vertical with the surface of polarization plates 1
When observing the surface of polarization plates 1 in (Z-direction), the cracking 25 of distributed in three dimensions can be seen with the state of coincidence.That is, three
The cracking 25 of dimension distribution can be observed as the two-dimensional orthographic projection on the surface (X/Y plane) of polarization plates 1.With polarization
The multiple crackings 25 overlapped on the vertical direction (Z-direction) in the surface of plate 1 can be cracked on the surface of polarization plates 1 as one
25 and be seen.That is, the multiple crackings 25 overlapped on the direction (Z-direction) vertical with the surface of polarization plates 1 can be inclined
The surface of vibration plate 1 is counted as a cracking 25.
Quantity in cracking 25 is below for 3, is easy to further suppress light leakage.The length 1 of cracking 25 can be with
It it is 0 μm less than 50 μm.The length 1 of cracking 25 is observed on the direction (Z-direction) vertical with the surface of polarization plates 1
The length for the cracking 25 arrived is the shortest distance of the end and the edge of through hole 21 of a side of cracking 25.It can be in the first table
Face (such as surface of third protective film 3) measures the length 1 of cracking 25.It can also be in the second table of the back side in first surface
Face (such as surface of mold release film 13) measures the length 1 of cracking 25.Can be, in the tortoise that the first surface of polarization plates 1 is measured to
The length 1 for splitting 25 is 0 μm less than 50 μm, and the length 1 for the cracking 25 being measured in the second surface of polarization plates 1 is
0 μm less than 50 μm.In the case where 25 length 1 of being cracked is less than 50 μm, being easy to further suppress can be by visuognosis
Degree light leakage.The quantity of cracking 25 is fewer, and cracking 25 is shorter, then easier to further suppress light leakage.In addition, cracking
25 quantity is fewer, and cracking 25 is shorter, then the mechanical strength of polarization plates 1 is higher, the easier manufacture for inhibiting image display device
The breakage of polarization plates 1 in the process.Therefore, cracking 25 is most preferably not present.
The diameter d (internal diameter d1 or d2) of through hole 21 for example can be 50~5000 μm.
The manufacturing method of the polarization plates 1 of present embodiment includes：
By membranaceous polarizing film and multiple processes that are optical film overlapped and forming laminated body；And divide to laminated body irradiation is accurate
The impulse wave of sub- laser and form the process through the hole (through hole 21) of laminated body,
The output of excimer laser is less than 20W,
The intensity of the outer peripheral portion of the luminous point of excimer laser is 80% bigger than the maximum of the intensity of luminous point,
The spotlight diameter of excimer laser is bigger than 50 μm,
The repetition rate of excimer laser is less than 1000Hz.
In the present embodiment, the part by excimer laser irradiation in above-mentioned laminated body forms through hole 21.With
Under, each process is described in detail.
Laminated body by be repeated polarizing film 7 and each optical film (3,5,9,13) be bonded or the mutual patch of optical film
It closes and obtains.It should be noted that adhesive layer 11 for example can be by applying adhesive by shape to the surface of the second protective film 9
At.
Excimer laser can be any one following.
F2Laser (oscillation wavelength：157nm)
ArF laser (oscillation wavelengths：193nm)
KrF laser (oscillation wavelengths：248nm)
XeCl laser (oscillation wavelengths：308nm)
XeF laser (oscillation wavelengths：351nm)
The oscillation wavelength of excimer laser is considerably shorter than the oscillation wavelength of other laser.For example, CO2The oscillation wavelength of laser is
9.4 μm or 10.6 μm.By the short excimer laser irradiation of wavelength in laminated body, polarizing film 7 and each light are constituted
The macromolecule for learning film (3,5,9,13) is easy instantaneous decomposition, distillation, the heating of associated laminated body with the irradiation of excimer laser
It is inhibited.Therefore, it is easy to simultaneously form the small through hole 21 of verticality, the polarizing film 7 caused by heat and each optical film
Chemically rotten of (3,5,9,13) is also inhibited.On the other hand, in the laser irradiation for growing wavelength in the feelings of laminated body
Under condition, in the illuminated part of laser, although temperature is easy to rise, it is difficult to happen and constitutes polarizing film 7 and each optics
High molecular decomposition, the distillation of film (3,5,9,13).That is, by warmed-up partial melting, change by the irradiation by laser
Shape just forms through hole.Therefore, assuming that in the case of using the wavelength laser longer than the wavelength of excimer laser, it is difficult to control
The verticality of through hole processed is easy to form polarization because of chemically rotten of polarizing film 7 and each optical film (3,5,9,13)
Elimination portion.
The output of excimer laser is 1W less than 20W.The situation for being 20W or more in the output of excimer laser
Under, it is easy to form cracking 25 around through hole 21, the width W in polarization elimination portion 23 is easy to become larger.Excimer laser it is defeated
Going out can be 5W or more and 8W or less.
As shown in figure 4, the luminous point LS of excimer laser is circle.Along the center Lc of the luminous point LS by excimer laser
The intensity distribution ID of luminous point LS of excimer laser of straight line be carnival hat type.Luminous point LS can rename as making and excimer laser
The section of the vertical excimer laser of direction of travel.The verticality of the through hole formed using the excimer laser of carnival hat type is held
The verticality of through hole for being easily distributed as the excimer laser of Gaussian than use intensity and being formed is small.The luminous point of excimer laser
The 80% of the maximum ILc of intensity of the intensity ILe than luminous point LS of the outer peripheral portion Le of LS is big and is the 100% or less of ILc.It changes
Yan Zhi, (ILe/ILc) × 100 to 80% is big and is 100% or less.In other words, { (ILc-ILe)/ILc } × 100 is 0% or more
And it is less than 20%.ILc can rename as making the average value of the intensity of the flat part (top) in intensity distribution ID.ILc can also change
The referred to as intensity of the center Lc of luminous point LS.Below in 80% that ILe is ILc, verticality a/b is easy to become larger.Change speech
It is 80% below at (ILe/ILc) × 100, and verticality a/b is easy to become larger.In other words, (ILc-ILe)/
ILc } × 100 in the case of 20% or more, verticality a/b is easy to become larger.ILe can for ILc 90% or more and 95% with
Under.In other words, (ILe/ILc) × 100 can be 90% or more and 95% or less.In other words, { (ILc-ILe)/ILc } × 100
Can be 5% or more and 10% or less.The unit of intensity ILe and intensity ILc for example can be W/m2。
It is accurate in the case where formation has through hole 21 with the diameter d of the spotlight diameter equal extent of excimer laser
The spotlight diameter of molecular laser greatly and is 2000 μm or less than 50 μm.It is 50 μm of feelings below in the spotlight diameter of excimer laser
Under condition, verticality a/b is easy to become larger.The spotlight diameter of excimer laser can rename as making the straight of the luminous point LS of excimer laser
Diameter.The spotlight diameter of excimer laser can be 600 μm or more and 1000 μm or less.The spotlight diameter of excimer laser can not
It is consistent with the diameter d of through hole 21.For example, it is also possible to the surface by scanning laminated body with the small excimer laser of spotlight diameter
Defined region, to form the through hole 21 with the diameter d bigger than the spotlight diameter of excimer laser.
The repetition rate of excimer laser is 10Hz less than 1000Hz.It is in the repetition rate of excimer laser
It in the case of 1000Hz or more, is easy to form cracking 25, is easily formed polarization elimination portion 23.The repetition rate of excimer laser
Can be 100Hz or more and 500Hz or less.
There are the internal diameters of the through hole 21 of the surface side of illuminated excimer laser (such as 3 side of third protective film) than its phase
Toss about (such as 13 side of mold release film) through hole 21 the big tendency of internal diameter.
Polarizing film 7 can be the membranaceous polyethenol series tree being fabricated to by processes such as extension, dyeing and crosslinkings
Fat.The details of polarizing film 7 is as described below.
For example, first, membranaceous polyvinyl alcohol resin is extended along uniaxial direction or biaxially oriented.Along single shaft side
To the dichroic ratio of the polarizing film 7 after extension, there are high tendencies.After extension, using the dyeing liquor for including potassium iodide etc., by
Iodine or dichroism pigment (poly- iodine) dye polyvinyl alcohol resin.Dyeing liquor can also include boric acid, zinc sulfate or chlorine
Change zinc.Polyvinyl alcohol resin can also be washed before dyeing.From the surface of polyvinyl alcohol resin by washing
Remove dirt and anti-sticking agent.In addition, polyvinyl alcohol resin is swollen because of washing, as a result it is easy to inhibit the color spot of dyeing
(non-uniform dyeing).The poly- second after dyeing is handled by the solution of crosslinking agent (such as aqueous solution of boric acid) in order to realize crosslinking
Enol system resin.After the processing carried out based on crosslinking agent, polyvinyl alcohol resin is washed, then to polyethenol series
Resin is dried.Polarizing film 7 is obtained by above step.Polyvinyl alcohol resin is by by polyvinyl acetate system resin
It carries out saponification and obtains.Polyvinyl acetate system resin for example can be vinyl acetate homopolymer i.e. polyvinyl acetate,
Or the copolymer (such as vinyl-vinyl acetate copolymer) of vinyl acetate and other monomers.With vinyl acetate copolymerization
Other monomers can also be unsaturated carboxylic acid class, olefines, vinyl ethers, unsaturated sulfonic acid class or tool other than ethylene
There is the acrylic amide of ammonium.Polyvinyl alcohol resin can also be modified by aldehydes.Modified polyvinyl alcohol resin is for example
Can be part formalizing polyvinyl alcohol, polyvinyl acetal or polyvinyl butyral.Polyvinyl alcohol resin can be with
It is the dehydration treatment of polyvinyl alcohol or the polyene system alignment films such as dehydrochlorinated products of polyvinyl chloride.It can also be before extension
It is dyed, can also be extended in dyeing liquor.The length of polarizing film 7 after extension for example can be the length before extending
3~7 times.
The thickness of polarizing film 7 for example can be 1 μm or more and 50 μm or less or 4 μm or more and 30 μm or less.In general,
In the case that thin polarizing film 7 extends along uniaxial direction, in trepanning process or small pieces cutting action, it is easy to be formed along prolonging
Stretch the cracking 25 in direction.But by using the above-mentioned trepanning process of excimer laser, the formation of cracking 25 can be inhibited.
First protective film 5 and the second protective film 9 are the thermoplastic resins for having translucency, can also be optically
Transparent thermoplastic resin.The resin for constituting the first protective film 5 and the second protective film 9 for example can be chain polyolefin tree
Fat, cyclic olefin polymer system resin (COP systems resin), cellulose esters system resin, polyester based resin, polycarbonate-based resin,
(methyl) acrylic resin, polystyrene resin or their mixture or copolymer.The composition of first protective film 5
It can be identical with the composition of the second protective film 9.The composition of first protective film 5 can also be with the composition of the second protective film 9 not
Together.
Chain polyolefin-based resins for example can be the homopolymerization of chain olefin as polyvinyl resin or acrylic resin
Body.Chain polyolefin-based resins can also be the copolymer being made of two or more chain olefins.
Cyclic olefin polymer system resin (cyclic polyolefin hydrocarbon system resin) for example can be that the open loop of cyclic olefin is (total) poly-
Fit or cyclic olefin addition polymerization body.Cyclic olefin polymer system resin for example can be cyclic olefin and chain olefin
Copolymer (such as random copolymer).The chain olefin for constituting copolymer for example can be ethylene or propylene.Cyclic olefin is poly-
It can also be to be grafted obtained from unsaturated carboxylic acid or derivatives thereof is modified above-mentioned condensate to close object system resin
Condensate or their hydride.Cyclic olefin polymer system resin for example can be to use norbornene or polycyclic norborneol
The norbornene resin of the orbornene-baseds monomer such as alkene monomer.
Cellulose esters system resin for example can be cellulosic triacetate (triacetyl cellulose (TAC)), cellulose diethyl
Acid esters, cellulose tripropionate or cellulose dipropionate.Their copolymer can also be used.It can also use and be taken with other
Cellulose esters system resin obtained from a part for hydroxyl has been modified for base.
The polyester based resin other than cellulose esters system resin can also be used.Polyester based resin for example can be polybasic carboxylic acid
Or derivatives thereof condensation polymer with 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 naphthalenedicarboxylic acid diformazan
Ester.Polyhydric alcohols such as can be glycol.Polyhydric alcohols such as can be ethylene glycol, propylene glycol, butanediol, neopentyl glycol or hexamethylene
Alkane dimethanol.
Polyester based resin for example can be polyethylene terephthalate, polybutylene terephthalate (PBT), poly- naphthalene two
Formic acid glycol ester, polybutylene naphthalate, polypropylene terephthalate, polytrimethylene naphthalate, poly- pair
Cyclohexyl dimethyl ester or poly- naphthalenedicarboxylic acid cyclohexane dicarboxylates.
Polycarbonate-based resin is by condensate made of carbonate group bonding polymerized unit (monomer).It is polycarbonate-based
Resin can be the modified polycarbonate with the polymer backbone after modification, can also be 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
Object；Methyl methacrylate-acrylate-(methyl) acrylic copolymer；(methyl) acrylate-styrene copolymer
(such as MS resins)；Copolymer (such as the methyl methacrylate of methyl methacrylate and the compound with alicyclic alkyl
Ester-cyclohexyl methacrylate copolymer, methyl methacrylate-(methyl) acrylic acid norbornyl ester copolymer etc.).
Clip the optics of at least one party in a pair of of optical film (the first protective film 5 and the second protective film 9) of polarizing film 7
Film can include triacetyl cellulose (TAC).Clip a pair of of optical film (the first protective film 5 and the second protective film of polarizing film 7
9) optical film of at least one party in can include cyclic olefin polymer system resin (COP systems resin).Clip the one of polarizing film 7
Optical film at least one party in optical film (the first protective film 5 and the second protective film 9) can include polymethylacrylic acid
Methyl esters (PMMA).A pair of of optical film (the first protective film 5 and the second protective film 9) both sides for clipping polarizing film 7 can also include
Triacetyl cellulose.Can also be in a pair of of the optical film (the first protective film 5 and the second protective film 9) for clip polarizing film 7
The film of one side includes triacetyl cellulose, and the film for clipping another party in a pair of of optical film of polarizing film 7 is poly- comprising cyclic olefin
Close object.It can also be the film of the side in a pair of of the optical film (the first protective film 5 and the second protective film 9) for clip polarizing film 7
Including triacetyl cellulose, the film for clipping another party in a pair of of optical film of polarizing film 7 includes polymethyl methacrylate.?
The film that can be the side in a pair of of the optical film (the first protective film 5 and the second protective film 9) for clip polarizing film 7 includes ring
Shape olefin polymer system resin, the film for clipping another party in a pair of of optical film of polarizing film 7 include polymethyl methacrylate.
In the case where the optical film being made of TAC, COP system resin or PMMA connects with polarizing film 7, by previous processing method come
It reduces the verticality a/b of through hole 21 and the formation of polarization elimination portion 23 and cracking 25 is inhibited to be difficult.But by making
With the above-mentioned trepanning process of excimer laser, the verticality a/b of through hole 21 can be reduced, and inhibit polarization elimination portion 23 and
The formation of cracking 25.
The vitrification point Tg of polarizing film 7 or each optical film (3,5,9 or 13) can be 100~180 DEG C or 108~180
℃.In the case where optical film (3,5,9 or 13) is made of triacetyl cellulose (TAC), the glass of optical film (3,5,9 or 13)
It can be 160~180 DEG C to change temperature Tg.In optical film (3,5,9 or 13) by cyclic olefin polymer system resin (COP systems tree
Fat) constitute in the case of, the vitrification point Tg of optical film (3,5,9 or 13) can be 126~136 DEG C.Optical film (3,5,
9 or in the case of 13) being made of polymethyl methacrylate (PMMA), the vitrification point Tg of optical film (3,5,9 or 13) can
To be 108~136 DEG C.The situation for being 100 DEG C or more in the vitrification point Tg of polarizing film 7 and each optical film (3,5,9,13)
Under, for polarization plates 1, excellent heat resistance is easy to inhibit to polarize caused by the heat associated with the irradiation of excimer laser
The deformation of plate 1.
First protective film 5 or the second protective film 9 can include from by lubricant, plasticizer, dispersant, heat stabilizer, purple
At least one additive selected in the group that ultraviolet absorbers, infrared absorbent, antistatic agent and antioxidant are constituted.
The thickness of first protective film 5 for example can be 5 μm or more and 90 μm or less, 5 μm or more and 80 μm or less or 5 μm
Above and 50 μm or less.The thickness of second protective film 9 also for example can be 5 μm or more and 90 μm or less, 5 μm or more and 80 μm with
Under or 5 μm or more and 50 μm or less.
First protective film 5 or the second protective film 9 can be the films with optical function as phase difference film or brightness enhancement film.
For example, the film being made of above-mentioned thermoplastic resin is extended, forms liquid crystal layer etc. on the film, this makes it possible to obtain have been assigned to appoint
The phase difference film of the phase difference value of meaning.
First protective film 5 can fit in polarizing film 7 via adhesive linkage.Second protective film 9 can also be via adhesive linkage
And fit in polarizing film 7.Adhesive linkage can include the water systems bonding agents such as polyvinyl alcohol, can also be penetrated comprising aftermentioned active-energy
Line curable resin.
Active energy ray-curable resin is by the cured resin of illuminated active energy beam.Active-energy is penetrated
Line for example can be ultraviolet light, visible light, electron ray or X-ray.Active energy ray-curable resin can be ultraviolet light
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
Object.Active energy ray-curable resin can include that the cation of the curing reaction for causing above-mentioned curability compound is poly-
Close initiator or radical polymerization initiator.
The curability compound of cationically polymerizable for example can be epoxy based compound (to be had at least one in the molecule
The compound of epoxy group) or the oxetanes based compound (chemical combination at least one oxetanes ring in the molecule
Object).Free-radical polymerised curability compound for example can be (methyl) acrylic compounds (to be had at least in the molecule
The compound of one (methyl) acryloxy).Free-radical polymerised curability compound can also be with radical polymerization
The vinyl compound of the double bond of conjunction property.
Active energy ray-curable resin can as needed and include cationic polymerization accelerating agent, ion trap agent,
Antioxidant, chain-transferring agent, tackifier, thermoplastic resin, filler, flow modifier, plasticizer, antifoaming agent, antistatic agent,
Levelling agent or solvent etc..
Adhesive layer 11 for example can include acrylic acid series pressure-sensitive type bonding agent, rubber series pressure-sensitive type bonding agent, silicone-based sense
The pressure-sensitive type bonding agent such as die mould bonding agent or polyurethane series pressure-sensitive type bonding agent.The thickness of adhesive layer 11 for example can be 2 μm with
It is upper and 500 μm or less, 2 μm or more and 200 μm or less or 2 μm or more and 50 μm or less.
The resin for constituting third protective film 3 can be with the example as the resin for constituting the first protective film 5 or the second protective film 9
The above-mentioned resin lifted is identical.The thickness of third protective film 3 for example can be 5 μm or more and 200 μm or less.
Constituting the resin of mold release film 13 can enumerate with as the resin for constituting the first protective film 5 or the second protective film 9
Above-mentioned resin it is identical.The thickness of mold release film 13 for example can be 5 μm or more and 200 μm or less.
The image display device of the present invention is such as can be liquid crystal display device or organic EL display device.For example, such as
Shown in Fig. 5, the liquid crystal display device 30 of present embodiment have liquid crystal cells 10, the side for being overlapped in liquid crystal cells 10 surface
The polarization plates 1a (the first polarization plates) of (first surface) and be overlapped in liquid crystal cells 10 another party surface (second surface)
Another polarization plates 1b (the second polarization plates).Polarization plates 1a and 1b shown in fig. 5 is not in addition to having mold release film 13 and third
Other than this point of protective film 3, other are identical as polarization plates 1 shown in Fig. 1 and 2.Polarization plates 1a (the first polarization plates) is via bonding
Layer 11 and be pasted on the first surfaces of liquid crystal cells 10.Polarization plates 1a (the first polarization plates) has be overlapped in liquid crystal cells 10 the
The adhesive layer 11 on one surface, the second protective film 9 for being overlapped in adhesive layer 11, the polarizing film 7 for being overlapped in the second protective film 9 and
It is overlapped in the first protective film 5 of polarizing film 7.Another polarization plates 1b (the second polarization plates) is pasted on liquid crystal list via adhesive layer 11
The second surface of member 10.Another polarization plates 1b (the second polarization plates) has the adhesive layer for the second surface for being overlapped in liquid crystal cells 10
11, it is overlapped in the second protective film 9 of adhesive layer 11, the polarizing film 7 of the second protective film 9 is overlapped in and is overlapped in polarizing film 7
First protective film 5.Liquid crystal cells 10 constitute liquid crystal display panel 20 with a pair of of polarization plates 1a and 1b.Liquid crystal display panel 20 and backlight (face
Light supply apparatus) etc. other components constitute liquid crystal display device 30.Other components such as backlight are omitted in Figure 5.
More than, one embodiment of the present invention is illustrated, but the present invention is not limited to the above embodiments.
The shape of polarization plates can be corresponding with purposes variously-shaped.Here, the shape of polarization plates refers to from Fig. 1~3
The shape of polarization plates entirety observed of Z-direction (direction vertical with the surface of polarization plates 1).For example, the shape of polarization plates
It can be the polygon other than quadrangle.For example, polarization plates can also be round, ellipse or indefinite shape.Outside polarization plates
Edge can be only made of straight line (multiple sides).Here, the outer rim of polarization plates refers to the Z-direction (table with polarization plates from Fig. 1~3
The vertical direction in face) outer rim of polarization plates observed.The outer rim of polarization plates can be only made of curve.Polarizing film 7 and each
Optical film (3,5,9,13) respective shape can also be various shape corresponding with purposes.
The shape on the direction (X/Y plane direction) parallel with the surface of polarization plates 1 of through hole can be and polarization plates
Purposes it is variously-shaped accordingly.The shape of through hole can be the shape other than circle.For example, the shape of through hole can be ellipse
Round, polygon or indefinite shape.It can be formed with multiple through holes 21 in polarization plates 1.It can be formed in polarization plates 1 tangible
The identical multiple through holes of shape.It can be formed with shape multiple through holes different from each other in polarization plates 1.Passing through in polarization plates 1
The position of through-hole is not limited.For example, being circular in polarization plates 1, through hole can be formed in the surface of polarization plates 1
Center (round center).
The number for the optical film (optical film for being overlapped in polarizing film) that polarization plates have is not limited.Polarization plates are had
The number of optical film can be one.For example, polarization plates 1 shown in Fig. 1 and 2 may not possess the first protective film 5 with
And the second protective film of either one in protective film 9, it may not possess the protective film of both sides.For example, polarization plates shown in fig. 5
The polarization plates of 1a (the first polarization plates) and the polarization plates of either one or both sides in polarization plates 1b (the second polarization plates) can also
Do not have the protective film of either one in the first protective film 5 and the second protective film 9.Polarization plates 1a (the first polarizations shown in fig. 5
Plate) and the polarization plates of polarization plates of either one or both sides in polarization plates 1b (the second polarization plates) may not possess both sides'
Protective film.
Mold release film can also be configured at the two sides of polarization plates via adhesive layer.
The optical film that polarization plates have can also be that reflective polarizing film, the film with anti-dazzle function, belt surface reflection are anti-
Only the film, reflectance coating of function, Transflective film, compensation film for angular field of view, optical compensating layer, touch sensing layer, antistatic layer or
Stain-proofing layer.
Polarization plates can also be also equipped with hard conating.For example, in polarization plates 1, the first protective film 5 can be located at hard conating with
Between polarizing film 7, hard conating can be between the first protective film 5 and third protective film 3.In this case, the first protective film 5
It can include triacetyl cellulose.The case hardness (pencil hardness) of hard conating can be H or more and 5H or less or 2H or more and
5H or less.Pencil hardness is defined hardness based on Japanese Industrial Standards (JIS K 5400).Pencil hardness is in above-mentioned model
Hard conating in enclosing is not readily susceptible to damage in the manufacturing process of polarization plates 1.But hard conating can become fragile if hard, therefore
It in the case of forming through hole, is easy to form cracking in hard conating using previous processing method.But by using standard
The above-mentioned trepanning process of molecular laser, can inhibit the formation of the cracking in hard conating.
Hard conating is, for example, the layer being made of the acrylic resin film for being provided with fine concaveconvex shape on surface.It is hard to apply
Layer can for example be formed by the film containing organic particle or inorganic fine particles.Can also use the film be crimped on have
The method (such as embossing etc.) of the roller of concaveconvex shape.The painting without containing organic particle or inorganic fine particles can also formed
After film, the method that the film is crimped on the roller with concaveconvex shape is used.
Inorganic fine particles for example can be silica, colloidal silicon dioxide, aluminium oxide, alumina sol, alumino-silicate,
Alumina silica composite oxides, kaolin, talcum, mica, calcium carbonate, calcium phosphate etc..In addition, organic particle (tree
Fat granule) it for example can be crosslinked polypropylene acid particles, methyl methacrylate/styrene copolymer resin particle, be crosslinked and gather
Styrene particles, crosslinked polymethylmethacrylaparticles particle, silicone resin particle, polyimide particle etc..
Binder Composition for making inorganic fine particles or organic particle disperse is selected from the material of high rigidity (hard conating)
It is fixed.Binder Composition for example can be uv curing resin, heat-curing resin, electron ray curing resin
Deng.From viewpoints such as productivity, hardness, as Binder Composition, it is preferable to use uv curing resin.
The thickness of hard conating for example can be 2 μm or more and 30 μm or less or 3 μm or more and 30 μm or less.In hard conating
Thickness be 2 μm or more in the case of, be easy to get the sufficient hardness of hard conating, the surface of hard conating is more difficult to be damaged
Wound.Thickness in hard conating is below for 30 μm, and there are following tendencies：Hard conating does not allow easily rupturable, easy suppression more
The bending (clot) of polarization plates caused by the cure shrinkage by hard conating is made, is easy to improve productivity.
Can be, the thickness of polarizing film 7 be 30 μm hereinafter, and the monomer transmissivity T of polarizing film 7 is 42.5 or more, and partially
Shake piece 7 degree of polarization P be 99.9 or more.In the past, it in the case of thin in polarizing film and monomer transmissivity and big degree of polarization, is easy
Light leakage is recognized around the through hole for being formed in polarization plates.But it is opened in above-mentioned by using excimer laser
Hole process is big in the case of forming the small through hole 21 of verticality, can inhibit to have thin and monomer transmissivity and degree of polarization
Polarizing film 7 polarization plates 1 in light leakage.
The moisture rate for the laminated body being made of polarizing film 7, the first protective film 5 and second protective film 9 these three films can be with
It is 1.0~5.0%, 0.5~5.5% or 1.0~5.0%.Within the above range by moisture rate, it is easy to inhibit and heat
The warpage of associated polarization plates 1 is easy to further suppress the light leakage in polarization plates 1.
In the polarization plates 1 shown in Fig. 1 and 2, the internal diameter of the through hole 21 of 3 side of third protective film (the first optical film side)
D1 than the through hole 21 of 13 side of mold release film (the second optical film side) internal diameter d2 greatly but it is also possible to be 3 side of third protective film (
One optical film side) through hole 21 internal diameter d1 it is smaller than the internal diameter d2 of the through hole 21 of 13 side of mold release film (the second optical film side).
In other words, in the polarization plates 1 shown in Fig. 1 and 2, the internal diameter d1 of the through hole 21 of 5 side of the first protective film is than the second protective film 9
The internal diameter d2 of the through hole 21 of side is greatly but it is also possible to be the internal diameter d1 of the through hole 21 of 5 side of the first protective film is than the second protective film
The internal diameter d2 of the through hole 21 of 9 sides is small.
Polarization plates 1 may not possess one or both in third protective film 3 and mold release film 13.For example, can be
Third protective film 3 is removed from polarization plates 1 in the manufacturing process of image display device, is removed.That is, third protective film 3 can be
Temporary protective film.Also mold release film 13 can be removed in the manufacturing process of image display device from polarization plates 1, be removed.
【Embodiment】
Hereinafter, the present invention is described in more detail by embodiment, but the present invention is not limited to these embodiments.
(embodiment 1)
Form the laminated body of the plate being made of polarizing film 7 and optical film (3,5,9,13) as shown in Figure 1.Stacking
Body has mold release film 13, the adhesive layer 11 for being overlapped in mold release film 13, the second protective film 9 for being overlapped in adhesive layer 11, is overlapped in
The polarizing film 7 of two protective films 9, the first protective film 5 for being overlapped in polarizing film 7 and the third for being overlapped in the first protective film 5 protection
Film 3.As polarizing film 7, the membranaceous polyvinyl alcohol being extended and after being colored is used.It is hard using band as the first protective film 5
Triacetyl cellulose (TAC) film (25KCHCN-TC of letterpress (Co., Ltd.) system) of coating.As the second protective film 9,
Use the film (ZF14-023- of Japanese ZEON (Co., Ltd.) system being made of cyclic olefin polymer system resin (COP systems resin)
1350).As third protective film 3, the PET protecting films (AS3-304 of rattan lumber industry (Co., Ltd.) system) with adhesive are used.
As mold release film 13, use PET (SP-PLR382050 of LINTEC (Co., Ltd.) systems).The thickness of mold release film 13 is 38 μm.
The thickness of adhesive layer 11 is 20 μm.The thickness of second protective film 9 is 23 μm.The thickness of polarizing film 7 is 12 μm.First protective film 5
Thickness be 32 μm.The thickness of third protective film 3 is 60 μm.The thickness of laminated body entirety is (comparable with the thickness b of polarization plates 1
Thickness) it is 185 μm.The longitudinally wide of laminated body entirety is 110mm.The transverse width of laminated body entirety is 60mm.
The impulse wave of excimer laser is irradiated in the surface of 3 side of third protective film of laminated body, in the stacking bodily form
At such through hole 21 shown in Fig. 1 and 2.The polarization plates 1 of embodiment 1 are obtained by above each process.As standard point
Sub- laser uses the ArF laser that oscillation wavelength is 193nm.As the oscillator of excimer laser, Mlase corporations are used
MLI series (model 1000).The output of excimer laser is set to 5W.As shown in figure 4, the luminous point LS of excimer laser is round
Shape.The intensity of the outer peripheral portion Le of the luminous point LS of excimer laser is being denoted as ILe, the maximum of the intensity of luminous point LS is (flat
The intensity at smooth top) when being denoted as ILc, { (ILc-ILe)/ILc } × 100 is 5%.Hereinafter, by { (ILc-ILe)/ILc } ×
100 are referred to as " Density Distribution ".The spotlight diameter of excimer laser is set as 1000 μm.The repetition rate of excimer laser is set as
100Hz。
As shown in figure 3, the shape on the direction (X/Y plane direction) parallel with the surface of polarization plates 1 of through hole 21 is
It is round.The opening portion of the opening portion of 3 side of third protective film of through hole 21 and 13 side of mold release film of through hole 21 is a pair of concentric
Circle.The internal diameter d1 (diameter) positioned at 3 side of third protective film of through hole 21 (circular opening portion) is determined.In addition,
Also the internal diameter d2 (diameter) positioned at 13 side of mold release film of through hole 21 (circular opening portion) is determined.Through hole 21
3 side of third protective film of illuminated excimer laser internal diameter d1 than through hole 21 the phase in 3 side of third protective film
Toss about (13 side of mold release film) internal diameter d2 it is big.The measured value of d1 and d2 is close with the spotlight diameter of excimer laser
Value.Verticality i.e. (d1-d2)/2b of through hole 21 is calculated according to the measured value of d1 and d2.The verticality of embodiment 1 is
0.06。
Using light microscope to through hole 21 around illuminated 3 side of third protective film of excimer laser into
Observation is gone.By the observation come attempt to being formed in the cracking around through hole 21, cracking of the length 1 less than 50 μm
The quantity for the cracking that quantity and length 1 are 50 μm or more is counted.It should be noted that cracking number definition with it is above-mentioned
Embodiment it is same.In addition, defining for the length 1 of cracking is same as above-mentioned embodiment.Observation as a result, implementing
Around the through hole 21 of the polarization plates 1 of example 1, there is no the crackings that length 1 is less than 50 μm.In addition, in the polarization plates of embodiment 1
Around 1 through hole 21, the cracking that length 1 is 50 μm or more is also not present.
The above-mentioned observation carried out by using light microscope (is become to attempt the polarization elimination portion 23 around through hole 21
Color portion) width W measurement.But, around the through hole 21 of polarization plates 1, there is no polarization elimination portions 23.
As in Fig. 6 (a) and (b) shown in, by downside polarization plates 62 cover backlight 64 (area source) entire surface.Downside
Polarization plates 62 are another polarization plates for the polarization plates of embodiment 1.Make the mold release film 13 of the polarization plates (1s) of embodiment 1
In face of downside polarization plates 62.The polarization plates 1s of embodiment 1 is overlapped on the polarization plates 62 of downside, and makes the polarization of embodiment 1
The absorption axiss A1s of plate 1s is orthogonal with the absorption axiss A62 of downside polarization plates 62.Upside polarization plates 60 are overlapped in the inclined of embodiment 1
On vibration plate 1s, and the absorption axiss A60 of upside polarization plates 60 is configured to put down with the absorption axiss A1s of the polarization plates 1s of embodiment 1
Row.Upside polarization plates 60 are also another polarization plates for the polarization plates of embodiment 1.
Backlight 64 is lighted in the state of being configured with the polarization plates 1s of embodiment 1 as described above, and visually observation is implemented
The polarization plates 1s of example 1.Observation as a result, there is no polarization plates 1s through hole 21s around light leakage.
(embodiment 2~7, comparative example 1~4)
In embodiment 6, as excimer laser, KrF laser (oscillation wavelengths are used instead of ArF laser：248nm).
In embodiment 7, using other than not having mold release film 13, adhesive layer 11 and third protective film 3 other with
The case where embodiment 1 identical laminated body.Hereinafter, for convenience of description, by the second protective film side view of the polarization plates of embodiment 7
Make " the mold release film side " of the polarization plates of embodiment 7.The inclined of embodiment 7 is made into first protective film side view of the polarization plates of embodiment 7
" the third protective film side " of vibration plate.In following table 1, third protective film is denoted as " pf ", mold release film is denoted as " Sp ".
In embodiment 2~7 and comparative example 1~4, by the output of excimer laser, Density Distribution, spotlight diameter and
Repetition rate is set as being worth shown in following table 1.
Other are same as Example 1 other than above item, and through hole is formed in laminated body using excimer laser,
To obtain 1~4 respective polarization plates of embodiment 2~7 and comparative example.
The perforation of 1~4 respective polarization plates of embodiment 2~7 and comparative example is found out using method similarly to Example 1
The verticality in hole.Embodiment 2~7 and 1~4 respective verticality of comparative example are shown in following table 1.
Using method similarly to Example 1, respectively to the illuminated standard in embodiment 2~7 and comparative example 1~4
The surface of the third protective film of molecular laser is observed, and is counted to the quantity for being formed in the cracking around through hole
Number, measures the length of each cracking.The quantity by the cracking in embodiment 2~7 and comparative example 1~4 is shown in following table 1 respectively.
In any embodiment, the quantity for being formed in the cracking around through hole is 3 or less.In any embodiment, it is formed in
The length of cracking around through hole is less than 50 μm.
Using method similarly to Example 1, respectively to the third protective film in embodiment 2~7 and comparative example 1~4
The surface of side is observed, and is determined to the width in the polarization elimination portion (discoloration portion) around through hole.It respectively will be real
The width W for applying the polarization elimination portion (discoloration portion) in example 2~7 and comparative example 1~4 is shown in following table 1.In any embodiment
In, the width of polarization elimination portion (discoloration portion) is respectively less than 32 μm.
Using method similarly to Example 1, passing through to the polarization plates in embodiment 2~7 and comparative example 1~4 respectively
Light leakage around through-hole is checked.Inspection result is shown in following table 1.
Industrial availability
The polarization plates of the present invention can be used as constituting LCD TV, have such as being pasted on liquid crystal cells or organic EL device
The optical component of the image display devices such as machine EL TVs or smart mobile phone.
Claims (9)
1. a kind of polarization plates have membranaceous polarizing film and are overlapped in multiple optical films of the polarizing film,
The polarization plates are characterized in that,
Verticality through the hole of the polarization plates is 0.00 less than 0.32,
The width in the polarization elimination portion around the hole is 0.00 μm less than 32 μm.
2. polarization plates according to claim 1, wherein
The quantity of cracking around the hole is 0 or more and 3 or less in per unit length 1mm.
3. polarization plates according to claim 1 or 2, wherein
The length of cracking around the hole is 0 μm less than 50 μm.
4. polarization plates according to claim 1 or 2, wherein
The optical film for clipping at least one party in a pair optical film of the polarizing film includes triacetyl cellulose.
5. polarization plates according to claim 1 or 2, wherein
The optical film for clipping at least one party in a pair optical film of the polarizing film includes cyclic olefin polymer.
6. polarization plates according to claim 1 or 2, wherein
The optical film for clipping at least one party in a pair optical film of the polarizing film includes (methyl) acrylic resin.
7. polarization plates according to claim 1 or 2, wherein
The polarizing film includes polyvinyl alcohol resin,
At least one optical film includes thermoplastic resin.
8. polarization plates according to claim 1 or 2, wherein
The polarization plates are used for image display device.
9. a kind of image display device, which is characterized in that
Including polarization plates described in any item of the claim 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-031293 | 2016-02-22 | ||
| JP2016031293A JP6188845B2 (en) | 2016-02-22 | 2016-02-22 | Polarizing plate and image display device |
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| CN107102389A CN107102389A (en) | 2017-08-29 |
| CN107102389B true CN107102389B (en) | 2018-11-02 |
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| CN201710082514.XA Active CN107102389B (en) | 2016-02-22 | 2017-02-15 | Polarization plates and image display device |
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| Country | Link |
|---|---|
| JP (1) | JP6188845B2 (en) |
| KR (1) | KR101911166B1 (en) |
| CN (1) | CN107102389B (en) |
| TW (2) | TW201839433A (en) |
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| JP7013279B2 (en) * | 2018-02-28 | 2022-01-31 | 日東電工株式会社 | Polarizer and its manufacturing method |
| JP2020020973A (en) * | 2018-08-01 | 2020-02-06 | 日東電工株式会社 | Polarizer, polarizing plate, and image display device |
| CN109407198B (en) * | 2018-12-19 | 2020-09-01 | 武汉华星光电技术有限公司 | Polaroid and display panel |
| JP7046901B2 (en) * | 2018-12-25 | 2022-04-04 | 日東電工株式会社 | Polarizer and its manufacturing method |
| JP7390799B2 (en) * | 2019-04-17 | 2023-12-04 | 日東電工株式会社 | Optical laminate and its manufacturing method, and display device |
| CN110441852B (en) * | 2019-08-14 | 2021-04-06 | 惠州市富丽电子有限公司 | Production process of pore polaroid |
| JP7387361B2 (en) * | 2019-09-27 | 2023-11-28 | 日東電工株式会社 | Optical laminates and image display devices |
| JP2021086114A (en) * | 2019-11-29 | 2021-06-03 | 住友化学株式会社 | Polarizing plate |
| CN113253371A (en) * | 2021-04-25 | 2021-08-13 | 惠州视维新技术有限公司 | Brightness enhancement film |
| JP7220764B1 (en) | 2021-11-02 | 2023-02-10 | 住友化学株式会社 | METHOD FOR MANUFACTURING FILM WITH THROUGH HOLE, AND CIRCULAR POLARIZER |
| JP2023180881A (en) * | 2022-06-10 | 2023-12-21 | 日東電工株式会社 | Optical laminate and method for manufacturing the same, and image display device using the optical laminate |
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| JP2010277018A (en) * | 2009-06-01 | 2010-12-09 | Sumitomo Chemical Co Ltd | Polarizing plate excellent in durability, method of manufacturing the same, and image display device using the same |
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2016
- 2016-02-22 JP JP2016031293A patent/JP6188845B2/en active Active
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- 2017-02-13 KR KR1020170019244A patent/KR101911166B1/en active IP Right Grant
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| KR101065790B1 (en) * | 2008-09-29 | 2011-09-20 | (주)와이티에스 | Laser nozzle apparatus for cutting polaroid film |
| CN104749679A (en) * | 2013-12-30 | 2015-07-01 | 三星Sdi株式会社 | Polarizer, method for preparing the same, polarizing plate comprising the same and optical display apparatus comprising the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101911166B1 (en) | 2018-10-23 |
| JP2017151162A (en) | 2017-08-31 |
| TW201839433A (en) | 2018-11-01 |
| KR20170098698A (en) | 2017-08-30 |
| CN107102389A (en) | 2017-08-29 |
| JP6188845B2 (en) | 2017-08-30 |
| TW201734516A (en) | 2017-10-01 |
| TWI633346B (en) | 2018-08-21 |
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