CN104422982B - Polarization plates and the liquid crystal display including the polarization plates - Google Patents
Polarization plates and the liquid crystal display including the polarization plates Download PDFInfo
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- CN104422982B CN104422982B CN201410431566.XA CN201410431566A CN104422982B CN 104422982 B CN104422982 B CN 104422982B CN 201410431566 A CN201410431566 A CN 201410431566A CN 104422982 B CN104422982 B CN 104422982B
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
Abstract
The present invention relates to polarization plates and the liquid crystal display including the polarization plates.The polarization plates include polarizer；Form the polyester film on the upper surface of the polarizer；With form depolarising layer on the upper surface of the polyester film, wherein, the stacked body of the polyester film and the polarization layer has 2% to 30% mist degree, and the polyester film has 20 μm to 100 μm of thickness.
Description
Technical field
The present invention relates to polarization plates and the liquid crystal display including the polarization plates.
Background technology
Polarization plates are used for the purpose for controlling the direction of vibration of light, to show liquid crystal display in the inside and outside of liquid crystal cells
The display pattern of device.Although in the initial period of development, liquid crystal display is applied to midget plant, in recent years liquid crystal
Show device be used on a large scale in application, including notebook computer, LCD monitor, color liquid crystal projecting apparatus, LCD TV, be used for
Navigation system, personal call, the measuring apparatus for interior or open air of automobile.
Polarization plates include polarizer and are stacked on the polarizer to protect the diaphragm of the polarizer.Although three second
Acyl cellulose (TAC) film is used as diaphragm, but TAC film is more expensive than common polymeric protective film.Although poly terephthalic acid
Glycol ester (PET) film can be used for replacing TAC film, but due to the x-axis direction corresponding to transverse direction (TD) and corresponding to longitudinal direction
(MD) difference (nx-ny) of refractive index between y-axis direction, PET film is by caused by the interference of the light sent as polarizer
Stain (stains) (such as moire effect (mura effect)).Although it can postpone and have to provide superelevation by stretching PET film
There is thin thickness and solve moire, but be limited on moire is prevented.
In this respect, Korean Patent Publication No. 2011-0097078 discloses an example of background technology, discloses
The polarization plates of the polarizer stacked including PET film and by thermal curing agents, wherein, PET film, which has, is less than 200g/m2It water
Vapor transmission rates (MVTR).
The content of the invention
According to an aspect of the present invention, polarization plates may include：Polarizer；Formed on the upper surface of the polarizer
Polyester film；With form depolarising layer on the upper surface of the polyester film, wherein, the polyester film and the depolarising layer
Stacked body can have 2% to 30% mist degree, and the polyester film can have 20 μm to 100 μm of thickness.
According to another aspect of the present invention, liquid crystal display may include polarization plates as described above.
Brief description of the drawings
Fig. 1 is the sectional view according to the polarization plates of an embodiment of the invention.
Fig. 2 is the sectional view according to the polarization plates of another embodiment of the invention.
Fig. 3 describes the schematic diagram of the relief pattern of the further embodiment according to the present invention.
Fig. 4 is the sectional view according to the liquid crystal display of an embodiment of the invention.
Embodiment
Embodiments of the present invention are explained with reference to the accompanying drawings.It should be understood that the present invention can be implemented in a different manner,
And it is not limited to following embodiment.In accompanying drawing, for clarity, the part unrelated with the explanation will be omitted.Entire disclosure
In, identical reference will represent identical part.
As employed herein, the term of such as "up" and "down" is defined referring to the drawings.Thus, it will be appreciated that term " on " can be with art
Language " under " interchangeably use.In addition, " (methyl) acrylic acid " can refer to acrylic acid and/or methacrylic acid to term used herein.
According to an aspect of the present invention, polarization plates may include：Polarizer；Formed on the upper surface of the polarizer
Polyester film；With form depolarising layer on the upper surface of the polyester film, wherein, the depolarising layer may include to contain diffusant
Resin bed and at least one of relief pattern resin bed.
Fig. 1 is the sectional view according to the polarization plates of an embodiment of the invention.Reference picture 1, polarization plates 100 can wrap
Include：Polarizer 10；Form the polyester film 20 on the upper surface of the polarizer 10；Resin bed 30 containing diffusant, it is described to contain
The resin bed 30 of diffusant includes diffusant 32 and formed on the upper surface of polyester film 20；With formed polarizer 10 following table
Optical film 40 on face, wherein, the stacked body 50 of the polyester film 20 and the resin bed 30 containing diffusant can have 2% to
30% mist degree.
Due to the x-axis direction corresponding to TD and corresponding to the refractive index difference (nx-ny) between MD y-axis direction, so
Polyester film can be by moire caused by the interference of the light sent as polarizer.Although it can be prolonged by stretching PET film with providing superelevation
Late and there is thin thickness, so as to solve moire, but be limited on moire is prevented.According to the present invention, specific depolarising layer
Formed on thin polyester film, so that the control of the mist degree of polyester film and depolarising layer is in a specific range, so moire is not
It is visible.
Polyester film is film and has 20 μm to 100 μm, such as 40 μm to 80 μm of thickness.If the thickness of polyester film is small
In 20 μm, then will exist only can not solve the problems, such as moire by depolarising layer, and if the thickness of polyester film is more than
100 μm, then will have the problem of making moire visible due to no depolarising layer.
Polarization plates diffusion comprising the stacked body with 2% to 30% mist degree is sent to depolarising layer from polyester film
Light, so that moire is invisible.If mist degree is less than 2%, can solve moire nonsensically, and if mist degree is more than
30%, although can then solve moire, due to vaporific stacked body, the transparency of polarization plates can deteriorate, so the aobvious of difference is presented
Show visibility, and there can be the durability of difference when being positioned under high temperature and high humidity.Stacked body can have, for example, 2% to
14%, 2% to 12%, or 2% to 10%, such as 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%,
12%th, 13% or 14% mist degree.
Stacked body can have 42% or bigger under 380nm to 700nm wavelength, such as 42.5% to 45% printing opacity
Rate.In the range of this, improved transparency is presented in polarization plates.
Polyester film can have 2% or smaller, such as 0.001% to 1.7% mist degree.In the range of this, polyester film can
Improve the light transmittance of polarization plates.
Due to polyester film be on any of MD and TD single shaft direction or simultaneously on MD and TD biaxially oriented with
The film of high draw ratio stretching, and polyester film has the delay of superelevation, so polyester film can make the light sent by polarizer
Interference minimizes, so improving the effect for solving moire.In one embodiment, polyester film can have by formula 1 represent
The front retardation (Re) of 2,500nm to 11,000nm under 550nm wavelength, 3 under 550nm wavelength represented by formula 2,
000nm to 15,000nm delay (Rth) in a thickness direction and by 1.4 under 550nm wavelength that formula 3 represents to
The degree (NZ) of 1.8 biaxiality.In the range of this, it can minimize moire when polyester film is applied to polarization plates.
<Formula 1>
Re=(nx-ny) × d
<Formula 2>
Rth=((nx+ny)/2-nz) × d
<Formula 3>
NZ=(nx-nz)/(nx-ny)
(wherein, nx, ny and nz are respectively the refractive index on the x-axis, y-axis and z-axis direction of polyester film, and d is film
Thickness (unit：nm))
In polyester film, x-axis direction represents TD, and y-axis direction represents MD, and z-axis direction represents thickness direction.
Polyester film can have 2, the 000nm or bigger under 550nm wavelength, specifically 2,000nm to 9,000nm, example
As 2000nm, 2500nm, 3000nm, 3500nm, 4000nm, 4500nm, 5000nm, 5500nm, 6000nm, 6500nm,
7000nm, 7500nm, 8000nm, 8500nm or 9000nm plane retardations (Ro).In the range of this, when polyester film application
When polarization plates, moire can be minimized.
Polyester film can be to be stretched on any of MD and TD single shaft direction or simultaneously on MD and TD biaxially oriented
Film, and with 1.5 to 7.0, preferably 6.0 to 7.0 draw ratio.In the range of this, polyester film has the delay of superelevation, institute
It is sightless with moire.
Generally by polyvinyl alcohol (PVA) film preparation polarizer.Due to the fragility to outside moisture, PVA polarizers are being made
After standby when be externally exposed for a long time environment it is long when, the polarization of PVA polarizers can deteriorate, so as to cause the bad of polarization plates durability
Change.When at 40 DEG C, or when being measured under 40 DEG C and 90%RH, polyester film has 0.001g/m2It is to 100g/m2My god,
Such as 0.1g/m2It is to 40g/m2My god, preferably 1g/m2It is to 20g/m2My god, for example, 1,2,3,4,5,6,7,8,9,
10th, 11,12,13,14,15,16,17,18,19 or 20g/m2It moisture-vapor transmission.Polyester film can improve polarization plates
Durability, and the life-span of polarization plates is extended due to its low moisture-vapor transmission.
Polyester film can be unrestrictedly any hyaline membrane.For example, polyester film may include polyethylene terephthalate tree
In fat, polybutylene terephthalate (PBT) resin, PEN resin and PBN resin
At least one, and not limited to this.
Polarization plates can further comprise the face coat to be formed on the lower surface of polyester film.Polyester film has hydrophobic table
Face, specifically when polyethylene terephthalate film is used as diaphragm, high hydrophobicity is presented in it.In order to used in polarization plates
In, this film surface treated, for assigning surface hydrophilicity to the surface of film.The surface of film is not fully modified, or can make
It is damaged with the sodium hydroxide for current cellulose membrane.It is such in order to solve the problems, such as, it can be formed and included on diaphragm
With the hydrophobic and bottom of hydrophilic functional groups face coat.It is described that there are hydrophobic and hydrophilic functional groups bottoms may include polyester
Resin, polyvinyl acetate resins and their mixture, and not limited to this.Because diaphragm to it by increasing face coat
And improved mechanical performance and low moisture-vapor transmission is presented, so polarization plates can be presented to the high of harsh external environment condition
Tolerance.In addition, face coat is formed between diaphragm and polarizer, so can improve viscous between diaphragm and polarizer
Attached property.
Because the resin bed containing diffusant is formed on the upper surface of polyester film, and diffuse the light sent from polyester film, institute
Moire is hindered with the resin bed containing diffusant.Therefore, the resin bed containing diffusant should have the mist degree higher than polyester film.One
In individual embodiment, the resin bed containing diffusant can have 1.5% to 28%, such as 2% to 28%, such as 2%, 3%, 4%,
5%th, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%,
21%th, 22%, 23%, 24%, 25%, 26%, 27% or 28% mist degree.In the range of this, stacked body can have 2% to
30% mist degree, so moire is sightless.Resin bed containing diffusant can be single or multiple lift.
Resin bed containing diffusant is formed by resin and diffusant, and due to resin and the refractive index gradient of diffusant,
Can solve moire by diffusing the light sent from polyester film.For example, diffusant can have it is higher than the refractive index (n3) of resin
Refractive index (n2) (n2>N3), the refractive index difference (n2-n3) and between diffusant and resin can be 0.001 or bigger, example
Such as 0.001 to 0.05, such as 0.0011,0.01,0.02,0.03,0.04 or 0.05.In the range of this, can solve polarization plates
Moire, and improved transparency can be also presented in depolarising layer.
Diffusant can be included in the resin bed containing diffusant in any way.For example, the resin bed containing diffusant is with
A kind of mode or the second way include diffusant, and diffusant spreads all over the resin bed distribution containing diffusant in the first way,
In the second way, the bottom of the resin bed containing diffusant includes diffusant, and the separated top of neighbouring bottom is not wrapped
Containing diffusant.In the first way, because diffusant spreads all over the resin bed distribution containing diffusant, so the resin containing diffusant
Layer can have the high effect for solving moire by diffused light.In the second way, because diffusant concentrates on neighbouring polyester
The bottom of film, so can solve moire, and because the top of depolarising layer does not include diffusant, so thick with low surface
Rugosity, element in addition can be stably stacked upon above such as film.
Due to the resin bed containing diffusant have higher than outside mist degree internal haze, so the resin bed containing diffusant by
Can minimize the diffusion of light in reflection.Resin bed containing diffusant can have in 1.5% to 28%, such as 2% to 28%
Portion's mist degree and 0.5% to 2.0% outside mist degree.
Diffusant is unrestricted in refractive index, material, shape etc..For example, diffusant can have 1.400 to 1.600,
Such as 1.450 to 1.580 refractive index (n2).In the range of this, when diffusant is when typical resin is used together, it is easy to
The refractive index of diffusant is controlled, and diffusant can improve the effect for solving moire.For example, diffusant can have it is for example spherical
The shape such as (such as pearl), radial, rod, and can have 1 μm to 10 μm of average grain diameter.In the range of this, diffusant
Can diffused light.For example, diffusant may include organic diffusant, inorganic diffusant and their mixture.Preferably, diffusant bag
Include for the organic diffusant compatible with resin.Organic diffusant may include styrene resin, (methyl) acrylic resin, silica
Alkane resin, melmac and polycarbonate resin, and not limited to this.The inorganic diffusant may include titanium oxide, silica,
Zirconium oxide etc..Resin bed containing diffusant may include identical diffusant or different in refractive index, material or vpg connection
At least two diffusants.
Resin forms the matrix of the resin bed containing diffusant, and unrestricted in refractive index, material etc..Resin can
With 1.400 to 1.600, such as 1.440 to 1.570 refractive index (n3).In the range of this, resin can improve solution moire
Effect.Resin is UV-curable resin or thermosetting resin, and be may include, for example, (methyl) acrylic resin, epoxy resin,
Urethane resin etc..
Resin bed containing diffusant may include 0.1 percentage by weight (wt%) to 5wt%, such as 0.5wt% is to 5wt%'s
Diffusant, 95wt% to 99.9wt%, such as 95wt% to 99.5wt% resin.In the range of this, the tree containing diffusant
Lipid layer can improve the straight-line luminous transmittance (in-line transmittance) of polarization plates because light diffusion can solve to interfere.
Polyester film, diffusant and resin form refractive index gradient, therefore can improve the effect for solving moire.When polyester film has
There is a n1 refractive index, during refractive index with n3 of the resin of refractive index of the diffusant with n2 and the resin bed containing diffusant, contain
The resin bed of diffusant can have the relation represented by formula 4, and can improve the moire for solving polarization plates in the range of formula 4
Effect：
[formula 4]
n1>n2>n3≥1.400.
The stacked body of polyester film and the resin bed containing diffusant can be prepared by typical method.E.g., including diffusant
It is applied on the upper surface of polyester film with the composition of resin, then solidifies, so as to prepares stacked body.By any method, example
Such as spin coating, die coating is coated.In view of the thickness of depolarising layer, can coating composition to 5 μm or smaller thickness.
It can be solidified by the UV photocurings irradiated or by heat cure.Composition can further comprise additive, such as expanding
The scattered dispersant of powder, light stabilizer etc..
Fig. 2 is the sectional view according to the polarization plates of another embodiment of the invention.
Reference picture 2, polarization plates 200 may include：Polarizer 10；Form the polyester film 20 on the upper surface of polarizer 10；
The relief pattern resin bed 36 on the upper surface of polyester film 20 is formed, and the relief pattern resin bed 36 includes formation and set
Relief pattern 34 in lipid layer 36；With form optical film 40 on the lower surface of polarizer 10, wherein, polyester film 20 and including
The stacked body 52 of the relief pattern resin bed 36 formed with relief pattern 34 can have 2% to 30% mist degree thereon.
Relief pattern is formed at least one in the upper and lower surface of resin bed, preferably in its upper surface
On.The light that relief pattern diffusion is sent from polyester film and resin bed, therefore moire is sightless.Relief pattern includes engraving
Shape, the shape of embossing and their mixing, and can have triangle, semicircle, half relative to the thickness direction of resin bed
The cross section of ellipse or irregular shape.Reference picture 3, relief pattern may include (a) prism-like pattern, (b) post lenticular figure
Case, (c) lenticule shape pattern (micro-lenses pattern), (d) embossed pattern (embossed pattern) etc..It is concavo-convex
Pattern can have 1.400 to 1.600 refractive index, and relief pattern resin bed can have 50nm to 5,000nm surface thick
Rugosity.In the range of this, can solve the moire of polarization plates by the diffusion of light, and other element etc. can be stacked stably
On the upper surface of resin bed.
Resin forms the matrix of the resin bed containing relief pattern, and unrestricted in refractive index, material etc..Resin
Can have 1.400 to 1.600, such as 1.410 to 1.550 refractive index (n4).In the range of this, resin can improve solution cloud
The effect of line.Resin is UV-curable resin or heat cured resin, and be may include, such as (methyl) acrylic resin, epoxy
Resin, urethane resin etc..
When polyester film has n1 refractive index, the refractive index of refractive index of the resin with n4 and relief pattern with n5
When, refractive index can have the relation represented by formula 5, and can improve the effect for the moire for solving polarization plates in the range of formula 5：
[formula 5]
n1>n4≥n5>1.400
In relief pattern resin bed, at least one in relief pattern and resin bed further comprises above-mentioned diffusion
Agent.Therefore, the visibility of moire can further be reduced.Content of the diffusant in relief pattern resin bed can be for 0.1wt% extremely
5wt%.
The stacked body of polyester film and relief pattern resin bed can be prepared by typical method.For example, for forming resin
The resin of layer is applied on the upper surface of polyester film, is then carved using for the mould for forming relief pattern, is then solidified, from
And form relief pattern.Or the upper surface of polyester film is applied to for forming the resin of resin bed, and dry, for shape
Resin into relief pattern is applied to resin for forming resin bed again, then using the mould for forming relief pattern
Son engraving, then solidifies, so as to form relief pattern.Here, for formed resin bed resin can with for forming bump maps
The resin of case is identical or different.
Depolarising layer can have 0.1 μm to 12 μm, such as 1 μm to 10 μm of thickness.In the range of this, depolarising layer can
Diffuse visible ray.Stacked body can have 0.1 μm to 10 μm, such as 1 μm to 10 μm of thickness.In the range of this, depolarising layer
It can be applied in optical display.
Depolarising layer can have 88% or bigger under 380nm to 700nm wavelength, and specifically 90% or bigger, more
Specifically 90% to 99% light transmittance.In the range of this, depolarising layer can improve the light transmittance of polarization plates.
Polyester film can be adhered on polarizer by not solvent-laden adhesive.As described above, not solvent-laden adhesive
For the adhesive not comprising vaporisable matter, and for solve when the polyester film with low moisture-vapor transmission pass through it is water base
When adhesive adheres to polarizer, difficulty of the discharge bubble such as vapor.Not solvent-laden binding agent can glue for thermosetting
Mixture or Photocurable adhesive, such as include the adhesive of (methyl) acrylic resin as adhesive component.
Because polarizer is included in the molecule of specific direction orientation, so when polarizer is installed on a liquid crystal display only
Transmit the light of specific direction.Polyvinyl alcohol film can be dyed by using iodine or dichroic dye, then stretch in specific direction and
Prepare polarizer.Specifically, polarizer is prepared by being swelled, dyeing, stretching and being crosslinked.It can be led to by those skilled in the art
Often known method carries out each step.
Polarizer can have 5 μm to 30 μm of thickness.In the range of this, polarizer can be used as liquid crystal display
In polarizer.
Optical film is formed on a surface of panel of LCD, and is had due to the delay of its preset range
There is viewing angle compensation performance.In one embodiment, optical film can have the plane of the 40nm to 70nm under 550nm wavelength
Interior delay (Ro).In the range of this, optical film can have viewing angle compensation performance.
Optical film is hyaline membrane, and can be including poly- by selected from by the celluosic resin including triacetyl cellulose resin etc.
Ethylene glycol terephthalate resin, polybutylene terephthalate (PBT) resin, PEN resin and poly- naphthalene
The polyester resin of dioctyl phthalate butanediol ester resin etc., cyclic polyolefin resin, polycarbonate resin, polyethersulfone resin, polysulfone resin,
Polyamide, polyimide resin, vistanex, polyarylate resin, polyvinyl alcohol resin, Corvic, gather inclined
Resin in the group that vinyl chloride resin and their mixture form is formed.Preferably, optical film is non-polyester film.
When being measured under 40 DEG C and 90%RH, optical film can have 100g/m2It is smaller, such as 0.001g/m2My god
To 40g/m2It moisture-vapor transmission.Optical film has low moisture-vapor transmission, so can improve the durable of polarization plates
Property, and extend the life-span of polarization plates.
Optical film can have 20 μm to 100 μm of thickness.In the range of this, optical film can be applied to be used for liquid crystal display
In the polarization plates of device.
Optical film can be adhered to polarizer by not solvent-laden adhesive.As described above, not solvent-laden adhesive
For the adhesive not comprising volatile materials, and for solve when the optical film with low moisture-vapor transmission pass through it is water base
When adhesive adheres to polarizer, difficulty of the discharge bubble such as vapor.Not solvent-laden binding agent can glue for thermosetting
Mixture or Photocurable adhesive, such as include the adhesive of (methyl) acrylic resin as adhesive component.
Polarization plates may include the adhesive phase to be formed on the lower surface of optical film, therefore polarization plates may be stacked on liquid crystal
Show on device panel.Adhesive can be contact adhesive, and not limited to this.
Polarization plates can further comprise at least one of binder course and functional layer.Except other layer, stacked body has
2% to 30% mist degree.Functional layer may include hard conating, anti-glazing layer etc..
Polarization plates can have 25 μm to 500 μm of thickness.In the range of this, polarization plates can be applied to optical display
In.
According to another implementation of the invention, liquid crystal display may include to be used for liquid crystal containing above-mentioned polarization plates
Show the module of device.
Fig. 4 is the sectional view according to the liquid crystal display of an embodiment of the invention.
Reference picture 4, the module 300 for liquid crystal display may include：Panel of LCD 205；Formed in liquid crystal
Show the first polarization plates 210 on the upper surface of device panel 205；Formed on the lower surface of panel of LCD 205 and in liquid
The second polarization plates 215 between LCD panel 205 and light source 220, wherein, the first polarization plates 210 may include：Formed in liquid
The first optical film 140 on the upper surface of LCD panel 205；First formed on the upper surface of the first optical film 140
Polarizer 110；Form the first polyester film 120 on the upper surface of the first polarizer 110；With comprising diffusant 132 and formed
The resin bed 130 containing diffusant on the upper surface of the first polyester film 120, and second polarization plates 215 may include：Formed
The second optical film 180 on the lower surface of panel of LCD 205；Formed on the lower surface of the second optical film 180
Second polarizer 160；With second polyester film 170 of the formation on the lower surface of the second polarizer 160.
Second polarization plates 215 may be formed between panel of LCD 205 and light source 220 including back light unit.Though
Right back light unit can be divided into Direct-type and side edge type according to the position of light source, but be not limited to according to the liquid crystal display of the present invention
This.Light source may include LED light source.
Panel of LCD 205 may include to be sealed in the liquid crystal cell layer (not shown) between upper substrate and infrabasal plate,
Wherein, upper substrate can be colour filter (CF) substrate, and infrabasal plate can be thin film transistor (TFT) (TFT) substrate.Upper substrate and lower base
Plate can be formed by identical or different material, and can be glass or plastic base.Plastic base may include to can be used for Flexible Displays
Polyethylene terephthalate (PET) substrate, makrolon (PC) substrate, polyimides (PI) substrate, the poly- naphthalene diformazan of device
Sour second diester (PEN) substrate, polyether sulfone (PES) substrate, polyarylate (PAR) substrate and cyclenes copolymer (COC) substrate, and it is unlimited
In this.
Liquid crystal cell layer may include vertical orientated (VA) pattern, (IPS) pattern, fringing field conversion (FFS) mould changed in face
Formula and twisted nematic (TN) mode liquid crystal.
First polarization plates and the second polarization plates are distributed through adhesive phase 150,190 and formed in panel of LCD
On one surface.Adhesive phase may include typical adhesive, such as contact adhesive.
Hereafter, the present invention will be more specifically explained in reference to some embodiments.Only used however, it should be appreciated that providing these embodiments
In explanation, without the limitation present invention should be interpreted as in any way.
Table 1 shows the details of polyethylene terephthalate (PET) film used in embodiment and comparative example.
Table 1
Embodiment 1
In 60 DEG C of stretching polyethylene alcohol films (VF-PS6000, Japanese Kuraray Co., Ltds, thickness：60 μm) it is initial to it
3 times of length, are then adsorbed by iodine, and 2.5 times of the length of stretching caudacoria are then stretched in 40 DEG C of boric acid solution, from
And prepare polarizer.It is coated with styrene beads (refractive index：And acrylic resin (refractive index 1.501)：1.463) mixture arrives
On one surface of PET film 1, then solidify, so as to prepare stacked body, wherein depolarising layer is formed in PET film 1.Then, make
Mist degree is measured with haze meter (H-150, Murakami Co., Ltd), and spectrophotometric is used under 380nm to 700nm wavelength
Count (V-7100, Jasco Co., Ltd) measurement light transmittance.Adhered to using not solvent-laden adhesive (C910, DIC Co., Ltd)
Tri acetyl cellulose membrane (KC4DR-1, Japanese Fuji Co., Ltds, thickness：40 μm) on the lower surface of polarizer.Then, will
The stacked body that wherein depolarising layer is formed in PET film 1 is adhered on the upper surface of polarizer, to use the bonding without solvent
On agent (C910, DIC Co., Ltd) adhesion PET film 1 to polarizer, so as to prepare polarization plates.
Embodiment 2
Acrylic resins of painting (refractive index：1.462) on a surface of PET film 1, then using for forming relief
The mould engraving of pattern, then by being solidified to form relief pattern, so as to prepare stacked body, wherein depolarising layer is formed
In PET film 1.Then, mist degree is measured using haze meter (H-150, Murakami Co., Ltd).With side same as Example 1
Formula prepares polarizer.Then, (KC4DR-1, Japanese Fuji are limited for the not solvent-laden adhesive adhesion tri acetyl cellulose membrane of use
Company, thickness：40 μm) on the lower surface of polarizer, then using not solvent-laden adhesive tacked stack body to polarizer
Upper surface on, in stacked body depolarising layer formed in PET film 1, so as to prepare polarization plates.
Embodiment 3
In addition to replacing PET film 1 using PET film 2, polarization plates are prepared in the same manner as example 1.
Embodiment 4
In addition to replacing PET film 1 using PET film 2, polarization plates are prepared in the same way as in example 2.
Embodiment 5
In addition to replacing PET film 1 using PET film 3, polarization plates are prepared in the same manner as example 1.
Embodiment 6
In addition to replacing PET film 1 using PET film 3, polarization plates are prepared in the same way as in example 2.
Embodiment 7
It is coated with styrene beads (refractive index：And acrylic resin (refractive index 1.501)：1.463) mixture is to PET film 1
A surface on, then using for formed embossed pattern mould carve, then by being formed by curing relief pattern, so as to
Prepare wherein depolarising layer and form the stacked body in PET film 1.Next, use haze meter (the limited public affairs of H-150, Murakami
Department) measurement mist degree.Polarizer is prepared in the same manner as example 1.Then, the not solvent-laden adhesive of use adheres to three second
Acyl cellulose membrane (KC4DR-1, Japanese Fuji Co., Ltds, thickness：40 μm) on the lower surface of polarizer, then using being free of
On the adhesive tacked stack body of solvent to the upper surface of polarizer, so as to prepare polarization plates.
Comparative example 1
Polarizer is prepared in the same manner as example 1.Then, the not solvent-laden adhesive adhesion triacetyl of use is fine
Tie up plain film (KC4DR-1, Japanese Fuji Co., Ltds, thickness：40 μm) on the lower surface of polarizer, then using being free of solvent
Adhesive adhesion thereon without depolarising layer PET film 1 to the upper surface of polarizer on, so as to prepare polarization plates.
Comparative example 2
Polarizer is prepared in the same manner as example 1.Then, the not solvent-laden adhesive adhesion triacetyl of use is fine
Tie up plain film (KC4DR-1, Japanese Fuji Co., Ltds, thickness：40 μm) on the lower surface of polarizer, then using being free of solvent
Adhesive adhesion thereon without depolarising layer PET film 2 to the upper surface of polarizer on, so as to prepare polarization plates.
Comparative example 3
Except by being coated with styrene beads (refractive index：And acrylic resin (refractive index 1.463)：1.465) mixture
On to a surface of PET film 1 and then solidify, and prepare beyond stacked body, prepare polarization in the same manner as example 1
Plate.
Comparative example 4
Except passing through acrylic resins of painting (refractive index：1.465) on a surface of PET film 1, then using being used for
The mould engraving resin of embossed pattern is formed, then solidified resin, makes stacked body be prepared with 44% mist degree formed with recessed
Beyond the stacked body of convex pattern, polarization plates are prepared in the same way as in example 2.
Comparative example 5
Except passing through acrylic resins of painting (refractive index：1.465) on a surface of PET film 1, then using being used for
The mould engraving resin of embossed pattern is formed, then solidified resin, makes stacked body be prepared with 31% mist degree formed with recessed
Beyond the stacked body of convex pattern, polarization plates are prepared in the same way as in example 2.
Polarization plates are arranged on the upper surface of panel of LCD, and another polarization plates is arranged on the liquid crystal display
On the lower surface of device panel (liquid crystal for including vertical orientated (VA) pattern) and between panel of LCD and back light unit,
Then assembling parts, so as to see whether to see due to the interference of light and caused stain.The situation of invisible interference stain
X is assessed as, the interference slightly visible situation of stain is assessed as Δ, and interferes stain to be evident that situation is assessed as O.
In order to evaluate the durability of polarization plates, first, the initial of polarization plates is measured under 380nm to 700nm wavelength
Light rate (T1).Then, polarization plates are placed on high temperature and super-humid conditions lower 500 hours (under 60 DEG C and 90%RH), then with
Mode same as mentioned above measures the light transmittance (T2) of polarization plates, so as to the change (Δ T, | T2-T1 |) based on light transmittance
Evaluate the durability of polarization plates.
Table 2
| Mist degree (%) | Light transmittance (%) | Interfere the observability of stain | Durability (Δ T) | |
| Embodiment 1 | 3 | 43.2 | X | 1.2% |
| Embodiment 2 | 5 | 43.5 | X | 1.3% |
| Embodiment 3 | 4 | 43.3 | X | 1.4% |
| Embodiment 4 | 6 | 43.2 | X | 1.3% |
| Embodiment 5 | 2.5 | 43.1 | X | 1.1% |
| Embodiment 6 | 8 | 42.6 | X | 0.9% |
| Embodiment 7 | 12 | 42.2 | X | 1.2% |
| Comparative example 1 | 0.8 | 43.7 | O | 1.6% |
| Comparative example 2 | 0.7 | 43.8 | O | 1.5% |
| Comparative example 3 | 1.5 | 43.6 | Δ | 1.1% |
| Comparative example 4 | 44 | 40.8 | X | 1.5% |
| Comparative example 5 | 31 | 41.5 | X | 1.4% |
As shown in Table 2, wherein stacked body with 2% to 30% mist degree according to the present invention polarization plates can diffused light with
Make interference stain sightless while ensure light transmittance.
On the contrary, interfere stain in the polarization plates of comparative example 1 and 2, it is apparent that not forming the resin containing diffusant wherein
Layer and relief pattern resin bed, and include single PET film 1 and single PET film 2 respectively.In addition, wherein stacked body has
The polarization plates of the comparative example 3 of mist degree less than 2% have the problem of observability of interference stain.Although in addition, wherein stacked body
The polarization plates of comparative example 4 and 5 with the mist degree more than 30% are not by the visibility problem of interference stain, but comparative example
4 and 5 polarization plates have the durability of low light transmittance and difference.
It should be understood that those skilled in the art can make various modifications, change, more without departing from the spirit and scope of the present invention
Change and equivalent embodiments.
Claims (16)
1. a kind of polarization plates, including：
Polarizer；
Polyester film, the polyester film are formed on the upper surface of the polarizer；With
Depolarising layer, the depolarising layer are formed on the upper surface of the polyester film,
Wherein, the stacked body of the polyester film and the depolarising layer has 2% to 12% mist degree, and the polyester film has
There is 20 μm to 100 μm of thickness,
Wherein described polyester film has the plane retardations of 4, the 500nm to 9,000nm under 550nm wavelength,
Wherein, the depolarising layer includes at least one of resin bed and relief pattern resin bed containing diffusant,
Wherein, the resin bed containing diffusant includes 0.1wt% to 5wt% diffusant,
Wherein, the relief pattern is included in prism-like pattern, post lens-like pattern, lenticule shape pattern and embossed pattern extremely
Few one kind,
Wherein, the stacked body has 42% to 45% light transmittance under 380nm to 700nm wavelength.
2. polarization plates as claimed in claim 1, wherein, the depolarising layer has 88% or bigger light transmittance.
3. polarization plates as claimed in claim 1, wherein, the resin bed containing diffusant is formed by resin and diffusant, its
Described in the resin bed containing diffusant the diffusant and the resin between have 0.001 to 0.05 refringence.
4. polarization plates as claimed in claim 3, wherein, the resin bed containing diffusant has the relation of formula 4：
[formula 4]
n1>n2>n3≥1.400
Wherein, n1 is the refractive index of the polyester film, and n2 is the refractive index of the diffusant, and n3 to be described containing diffusant
The refractive index of the resin of resin bed.
5. polarization plates as claimed in claim 3, wherein, the resin bed containing diffusant is in the first manner or second of side
Formula includes the diffusant, is distributed wherein the first way spreads all over the resin bed for the diffusant, described second
Mode includes for the bottom of the resin bed containing diffusant contains diffusant described in the diffusant and the neighbouring bottom
The top of resin bed do not include the diffusant.
6. polarization plates as claimed in claim 3, wherein, the diffusant includes phenylethylene resin bead, (methyl) acrylic acid tree
At least one of fat pearl, silicone resin pearl, melmac pearl and polycarbonate resin pearl.
7. polarization plates as claimed in claim 3, wherein, the resin of the resin bed containing diffusant includes (methyl) third
At least one of olefin(e) acid resin, epoxy resin and urethane resin.
8. polarization plates as claimed in claim 1, wherein, the relief pattern resin bed includes forming bumps on the resin layer
Pattern, and the relief pattern resin bed has the relation of formula 5：
[formula 5]
n1>n4≥n5>1.400
Wherein, n1 is the refractive index of the polyester film, and n4 is the resin of the resin bed of the relief pattern resin bed
Refractive index, and n5 be the relief pattern resin bed the relief pattern refractive index.
9. polarization plates as claimed in claim 1, wherein, the relief pattern resin bed further comprises diffusant.
10. polarization plates as claimed in claim 1, wherein, the polyester film has 0.001g/m2It is to 100g/m2It
Moisture-vapor transmission.
11. polarization plates as claimed in claim 1, wherein, the polyester film includes pet resin, gathered
In mutual-phenenyl two acid bromide two alcohol ester's resin, PEN resin and PBN resin at least
It is a kind of.
12. polarization plates as claimed in claim 1, further comprise：Formed between the polarizer and the polyester film
Not solvent-laden adhesive phase.
13. polarization plates as claimed in claim 1, further comprise：Form the optical film on the lower surface of the polyester film.
14. polarization plates as claimed in claim 13, wherein, the optical film includes celluosic resin, polyester resin, ring-type and gathered
Olefin resin, polycarbonate resin, polyethersulfone resin, polysulfone resin, polyamide, polyimide resin, vistanex,
At least one of polyarylate resin, polyvinyl alcohol resin, Corvic and polyvinylidene chloride resin.
15. polarization plates as claimed in claim 1, further comprise：Form the combination on the upper surface of the depolarising layer
At least one of layer and functional layer.
16. a kind of liquid crystal display, the liquid crystal display includes the polarization according to any one of claim 1 to 15
Plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130104394A KR101669318B1 (en) | 2013-08-30 | 2013-08-30 | Polarizing plate and liquid crystal display apparatus comprising the same |
| KR10-2013-0104394 | 2013-08-30 |
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| JP6763370B2 (en) * | 2015-03-31 | 2020-09-30 | 東洋紡株式会社 | Laminated glass plate |
| KR101813755B1 (en) * | 2015-05-28 | 2017-12-29 | 삼성에스디아이 주식회사 | Polarizing film and display including the same |
| KR102451514B1 (en) * | 2015-11-18 | 2022-10-06 | 엘지디스플레이 주식회사 | Liquid crystal display panel and curved display device using the same |
| KR102077686B1 (en) * | 2017-07-25 | 2020-02-14 | 주식회사 엘지화학 | Polarizing plate and liquid crystal display device comprising thereof |
| JP7222172B2 (en) | 2018-09-04 | 2023-02-15 | エルジー・ケム・リミテッド | Transparency variable device |
| KR102246299B1 (en) * | 2019-03-12 | 2021-04-29 | 주식회사 온빛 | The manufacturing method of high-refraction polarizing lens |
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| JP2004341553A (en) * | 1994-05-18 | 2004-12-02 | Dainippon Printing Co Ltd | Antidazzle film |
| CN101029937A (en) * | 2006-03-02 | 2007-09-05 | 富士胶片株式会社 | Optical film, anti-reflection film, polarizing plate and image display device |
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| KR20120048428A (en) * | 2010-11-05 | 2012-05-15 | 엘지디스플레이 주식회사 | Polarizer and lcd including the same |
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| CN102640023A (en) * | 2009-08-05 | 2012-08-15 | 第一毛织株式会社 | Polarising plate and a liquid crystal display device comprising the same |
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| JP2009156938A (en) * | 2007-12-25 | 2009-07-16 | Sumitomo Chemical Co Ltd | Antiglare film, antiglare polarizing plate and image display device |
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| JP2004341553A (en) * | 1994-05-18 | 2004-12-02 | Dainippon Printing Co Ltd | Antidazzle film |
| CN101029937A (en) * | 2006-03-02 | 2007-09-05 | 富士胶片株式会社 | Optical film, anti-reflection film, polarizing plate and image display device |
| CN101836136A (en) * | 2007-10-23 | 2010-09-15 | 住友化学株式会社 | Antiglare film, anti-dazzling polarizing plate and image display device |
| CN102640023A (en) * | 2009-08-05 | 2012-08-15 | 第一毛织株式会社 | Polarising plate and a liquid crystal display device comprising the same |
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| TWI612346B (en) | 2018-01-21 |
| CN104422982A (en) | 2015-03-18 |
| KR20150026062A (en) | 2015-03-11 |
| KR101669318B1 (en) | 2016-10-25 |
| TW201510587A (en) | 2015-03-16 |
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