KR101640635B1 - Polarizing plate, module for liquid crystal display comprising the same and liquid crystal display comprising the same - Google Patents

Abstract

The present invention provides a polarizer comprising: a polarizer; And a protective film laminated on one surface of the polarizer, wherein the protective film comprises a polarizing plate including a bilayer film having a photoelastic coefficient of 10 x 10 ^-12 to 20 x 10 ^-12 Pa ^-1 and a surface hardness of 2B or more, And a liquid crystal display device including the liquid crystal display device.

Description

[0001] The present invention relates to a polarizing plate, a module for a liquid crystal display including the polarizing plate, and a liquid crystal display including the polarizing plate.

The present invention relates to a polarizing plate, a module for a liquid crystal display including the same, and a liquid crystal display including the same.

The polarizing plate is used in and out of the liquid crystal cell for the purpose of controlling the direction of light oscillation in order to visualize the display pattern of the liquid crystal display device. Liquid crystal display devices have been used in a wide range from small-sized devices at the beginning of development to notebook computers, liquid crystal monitors, liquid crystal color projectors, liquid crystal televisions, navigation systems for vehicles, personal phones, and measurement devices used indoors and outdoors Respectively. The polarizer comprises a polarizer and a protective film laminated on both sides of the polarizer.

Triacetylcellulose (TAC) films are mainly used as protective films for liquid crystal display devices due to their transparency, high adhesiveness and high water permeability. However, the TAC film has a problem that it is expensive, its chemical resistance is poor, and its hardness is poor. Accordingly, studies are being made on a protective film for a polarizing plate that can replace a TAC film.

Korean Patent Publication No. 2009-0046803 discloses that all or a part of the hydroxyl groups in a compound having one furanos or pyranose structure or a compound having 2 to 12 furanos or pyranose structures in combination with at least one of them is esterified And a polarizing plate protective film containing a compound and a cellulose ester.

An object of the present invention is to provide a polarizing plate comprising a protective film having a low photoelastic coefficient and good chemical resistance and surface hardness.

Another object of the present invention is to provide a polarizing plate comprising a protective film having good durability and no problem of bubble generation.

It is still another object of the present invention to provide a polarizing plate comprising a protective film free from curling and having no peeling problem upon polarizer bonding.

It is another object of the present invention to provide a polarizing plate comprising a protective film which can replace a TAC film.

One aspect of the present invention is a polarizer comprising a polarizer; And a protective film laminated on one surface of the polarizer, wherein the protective film may include a bilayer film having a photoelastic coefficient of 10 x 10 ^-12 to 20 x 10 ^-12 Pa ^-1 and a surface hardness of 2B or more.

A liquid crystal display module according to another aspect of the present invention may include the polarizing plate.

The liquid crystal display device according to another aspect of the present invention may include the liquid crystal display device module.

Disclosed is a polarizing plate comprising a protective film having a low photoelastic coefficient, good chemical resistance, good surface hardness, good durability, no problem of bubble generation, no curling, and no peeling problem upon polarizer bonding Respectively. The present invention provides a polarizing plate comprising a protective film that can replace a TAC film.

1 is a cross-sectional view of a polarizing plate of one embodiment of the present invention.
2 is a partial cross-sectional view of a module for a liquid crystal display device according to an embodiment of the present invention.
3 is a cross-sectional view of a liquid crystal display device according to one embodiment of the present invention.

In the present specification, 'upper' and 'lower' refer to the drawings for convenience, and 'upper' may be changed to 'lower' and 'lower' may be changed to 'upper' depending on viewing time.

In the present specification, the 'photoelastic coefficient' is a value measured at a protective film thickness of 40 to 80 μm, 23 ° C. and a wavelength of 590 nm.

One aspect of the present invention is a polarizer comprising a polarizer; And a double layer protective film formed on the upper surface of the polarizer. The protective film may have a photoelastic coefficient of 10 x 10 ^-12 to 20 x 10 ^-12 Pa- ¹ and a surface hardness of 2B or more.

If the photoelastic coefficient of the protective film exceeds 20 x 10 < ~ ¹² > Pa <" ^{1 &} gt ;, the retardation value becomes large or the retardation value unevenness may occur when stretching and may directly affect the polarizer. The smaller the retardation value of the retardation unevenness is small, the photoelastic coefficient is low, the more advantageous in a low retardation unevenness side, the 10 x 10 ^-12 Pa ^-1 is less than the phase difference may be non-uniform, but, the photoelastic coefficient is too low, the protective film is Price The photoelastic coefficient does not need to be less than 10 x 10 < ^-12 > Pa < ^-1 > for use as an outer protective film. If the surface hardness of the protective film is less than 2B, the scratch resistance is not good, so that it can not be used as a protective film at the outermost portion of the polarizing plate, and scratches may occur. For example, the photoelastic coefficient may be 10 x 10 ^-12 to 15 x 10 ^-12 Pa ^-1 and the surface hardness may be 2B to H.

Protective film may be a measurement for 24 hours at 40 ℃ and 95% relative humidity water vapor permeability (moisture permeability) of 50 to 100g / m ² and 24hr, for example from 50 to 59g / m ² and 24hr. Within this range, the protective film may be less bubbled.

The protective film may have an in-plane retardation (Ro) of 3 to 10 nm at a wavelength of 550 nm. Within this range, it can be used as the outermost protective film of the polarizing plate.

The protective film may have a thickness direction retardation (Rth) of 10 to 60 nm, for example, 10 to 26 nm at a wavelength of 550 nm. Within this range, it can be used as the outermost protective film of the polarizing plate.

The protective film may have a transmittance of 90% or more, for example, 90 to 100% at a wavelength of 400 to 800 nm. In the above range, it can be used as a protective film of a polarizing plate.

The term " double layer "refers to a state in which two layers of which physical or chemical properties are completely distinguished from each other are laminated to each other. In a specific example, the double layer comprises a polycarbonate resin layer having a unit of the following formula And a non-polycarbonate resin layer formed on one side of the polycarbonate resin layer:

≪ Formula 1 >

(2)

(Wherein A is -CH ₂ -Y-CH ₂ - and Y is a cycloalkylene group having 4-20 carbon atoms or a structure represented by the following formula 3

(3)

(Wherein * is -CH ₂ of the A - and connections for, R _1, R _2, R _3, R ₄ are the same or different, each independently represent hydrogen or an alkyl group having a carbon number of 1-5).

The polycarbonate resin layer may be a film formed of a polycarbonate resin prepared by reacting a dihydroxy compound represented by the following formula (4) or (5):

≪ Formula 4 >

≪ Formula 5 >

(Wherein Y is a cycloalkylene group having 4-20 carbon atoms or a structure represented by the following formula (6)

(6)

(Wherein * is -CH ₂ In the formula, 5 - a connection region for, R _1, R _2, R _3, R ₄ are the same or different, each independently represent hydrogen or an alkyl group having a carbon number of 1-5).

In a specific example, the polycarbonate resin layer may be a non-extrusion-type polycarbonate resin layer in which the polycarbonate resin film is not stretched.

The dihydroxy compound of formula (4) may be isosorbide or isomannide, and may be used alone or in combination of two or more. The dihydroxy compound of the formula (5) is preferably selected from the group consisting of tricyclodecane dimethanol, pentacyclopentadecane dimethanol, 2,6-decalindimethanol, 1,4-cyclohexanedimethanol, norbornanedimethanol, cyclopentane- Dimethanol, 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro (5,5) undecane, etc., Or more. The carbonate ester forming compound is a carbonate compound usually used in the production of polycarbonate resin, for example, diphenyl carbonate can be used.

In the polycarbonate resin, the number of moles of the formula (1): the number of moles of the formula (2) is 99: 1 to 1:99, preferably 90:10 to 10:90 based on the sum of the number of moles of the formula (1) .

The polycarbonate resin may have a glass transition temperature of 90 to 200 占 폚, for example, 100 to 190 占 폚. Within the above range, heat resistance and moldability are good, co-extrusion with the non-polycarbonate resin layer can be made, and the surface hardness of the protective film can be improved.

The polycarbonate resin may have a weight average molecular weight of 30,000 to 200,000 g / mol, preferably 40,000 to 150,000 g / mol. Within this range, the strength of the protective film may be good and the moldability may be good.

The polycarbonate resin may further contain a structural unit derived from an aromatic dihydroxy compound in addition to the above-mentioned formulas (4) and (5). The aromatic dihydroxy compound is a compound ordinarily included in the production of an aromatic polycarbonate resin, and may be, for example, bisphenol A, but is not limited thereto.

The polycarbonate resin layer can increase the chemical resistance of the protective film. In a specific example, the polycarbonate resin layer can prevent discoloration of the protective film when the protective film is contacted with alcohols such as ethanol, isopropyl alcohol, esters such as ethyl acetate, and ketones such as methyl ethyl ketone and methyl isobutyl ketone.

The polycarbonate resin layer has a photoelastic coefficient of 10 x 10 ^-12 to 70 x 10 ^-12 Pa- ¹ , for example, 60 x 10 ^-12 to 70 x 10 ^-12 Pa- ^1, and a surface hardness of 2B or less, 6 to 7B.

The above-mentioned "non-polycarbonate resin" may include a transparent resin that does not include the structural units of the above formulas (1) and (2). In a specific example, the non-polycarbonate resin layer may be a polyester-based, cyclic polyolefin (COP) -based, poly (ethylene terephthalate) -based resin including polyethylene terephthalate (PET) or the like including acrylic, triacetylcellulose The film may be a film of one or more resins selected from the group consisting of an ether sulfone system, a polysulfone system, a polyamide system, a polyimide system, a polyolefin system, a polyarylate system, a polyvinyl alcohol system, a polyvinyl chloride system and a polyvinylidene chloride system. For example, it may be a film made of an acrylic resin.

The non-polycarbonate resin layer may have a photoelastic coefficient of 3 x 10 ^-12 to 10 x 10 ^-12 Pa- ¹ , for example, 3 x 10 ^-12 to 5 x 10 ^-12 Pa- ¹ . In the above range, the photoelastic coefficient of the polycarbonate resin layer can be further lowered so that it can be used as a protective film of a polarizing plate.

The non-polycarbonate resin layer may have a surface hardness of 2B to H. Within the above range, the hardness of the protective film can be increased, and the surface hardness of the polycarbonate resin layer can be improved.

The non-polycarbonate resin layer may have a glass transition temperature of 100 to 120 占 폚. Within this range, co-extrusion with the polycarbonate resin layer may be possible, and the surface hardness may be improved.

In an embodiment, a polycarbonate resin layer may be formed on the upper surface of the polarizer, and a non-polycarbonate resin layer may be formed on the upper surface of the polycarbonate resin layer. In this case, the photoelastic coefficient of the protective film can be lowered and the surface hardness can be improved.

The ratio (C1 / C2) of the photoelastic coefficient (C1) of the polycarbonate resin layer to the photoelastic coefficient (C2) of the non-polycarbonate resin layer may be 5 to 25, for example, 5 to 15. Within this range, there may be a low photoelastic effect.

The ratio (T1 / T2) of the thickness (T1) of the polycarbonate resin layer to the thickness (T2) of the non-polycarbonate resin layer is 1 to 9, for example, 1 to 6, for example, 1.01 to 5, For example, 1.01 to 3. For example, the polycarbonate resin layer with a protective film thickness of 40 占 퐉 may be 20 to 30 占 퐉, and the non-polycarbonate resin layer may have a thickness of 10 to 20 占 퐉. In this range, co-extrusion can be performed, and the chemical resistance, low photoelasticity, and surface hardness of the protective film can be all improved.

The protective film may have a thickness of 40 to 80 탆, for example, 40 to 60 탆. In the above range, it can be used in a liquid crystal display device. The thickness of the polycarbonate resin layer may be 20 to 30 占 퐉, and the thickness of the non-polycarbonate resin layer may be 5 to 20 占 퐉. In the above range, it can be used in a liquid crystal display device.

The protective film can be produced by laminating a polycarbonate resin film and a non-polycarbonate resin film to each other with an adhesive or a pressure-sensitive adhesive, but they can be co-extruded to produce an integral body. The "integral type" may mean that an adhesive layer, an adhesive layer, a coating layer or the like is not added between the polycarbonate resin layer and the non-polycarbonate resin layer, and that the two layers are not separated from each other independently.

The polarizer can be used without limitation as long as it is a polarizer conventionally used in the production of a polarizing plate. In an embodiment, the polarizer is prepared by dyeing a polyvinyl alcohol film with iodine or a dichroic dye and stretching it in a certain direction. Specifically, it is produced through a swelling process, a dyeing step, a stretching step and a crosslinking step. Methods of performing each step are commonly known to those skilled in the art.

The thickness of the polarizer is not particularly limited, but may be preferably 40 to 80 占 퐉.

At least one of a protective film and a retardation film may be further formed on the lower surface of the polarizer. The protective film and the retardation film are transparent resin films, for example, cellulose-based films including acrylic, triacetylcellulose (TAC), etc., polyester-based, cyclic polyolefin (COP) -based films including polyethylene terephthalate , A polycarbonate-based, polyether sulfone-based, polysulfone-based, polyamide-based, polyimide-based, polyolefin-based, polyarylate-based, polyvinyl alcohol-based, polyvinyl chloride-based, polyvinylidene chloride- Film. For example, it may be a protective film having no retardation, more preferably triacetylcellulose having no phase difference.

1 is a cross-sectional view of a polarizing plate of one embodiment of the present invention. 1, the polarizer 100 includes a polarizer 110, a first protective film 120 formed on the upper surface of the polarizer 110, a second protective film 130 formed on the lower surface of the polarizer 110, And a first adhesive layer 140 formed on the lower surface of the second protective film 130. The first protective film 120 includes a polycarbonate resin layer 121 formed on the upper surface of the polarizer 110, And a non-polycarbonate resin layer 122 formed on the upper surface of the polycarbonate resin layer 121.

The first adhesive layer 140 may be a pressure sensitive adhesive (PSA) layer and may be formed on a panel of a liquid crystal display (LCD). The first adhesive layer is a pressure-sensitive adhesive layer containing a (meth) acrylic copolymer and may have a thickness of 2 to 5 탆.

On the upper surface of the non-polycarbonate resin layer 122, a functional layer such as a hard coating layer, an antireflection layer, an antistatic layer and the like may be further formed.

A liquid crystal display module according to another aspect of the present invention may include the polarizing plate. In an embodiment, the module comprises a panel for a liquid crystal display, an upper polarizer formed on an upper surface of the panel, a lower surface of the panel, and a lower polarizer formed between the panel and the light source, wherein at least one of the upper polarizer and the lower polarizer comprises Of a polarizing plate.

2 is a partial cross-sectional view of a module for a liquid crystal display device according to an embodiment of the present invention. 2, the module 400 for a liquid crystal display includes a liquid crystal display panel 200, an upper polarizer 100 formed on the upper surface of the liquid crystal display panel 200, a lower surface of the liquid crystal display panel 200, And a lower polarizer plate 300 formed between the display panel 200 and the light source unit.

The upper polarizer 200 includes a first polarizer 110, a first protective film 120 formed on the upper surface of the first polarizer 110, a second protective film 130 formed on the lower surface of the first polarizer 110, And a first adhesive layer 140 formed on the lower surface of the second protective film 130. The first protective film 120 includes a polycarbonate resin layer 121 formed on the upper surface of the first polarizer 110 And a non-polycarbonate resin layer 122 formed on the upper surface of the polycarbonate resin layer 121. [ The lower polarizer 300 includes a second polarizer 310, a third protective film 320 formed on the lower surface of the second polarizer 310, a fourth protective film 330 formed on the upper surface of the second polarizer 310, And a second adhesive layer 340 formed on the upper surface of the fourth protective film 330.

The third protective film 320 is a film having a photoelastic coefficient of 10 x 10 ^-12 to 70 x 10 ^-12 Pa ^-1 , for example, 10 x 10 ^-12 to 20 x 10 ^-12 Pa ^-1 , It may be a single layer film made of a polycarbonate resin having the structural unit of the general formula (1) and the structural unit of the general structural formula (2).

The fourth protective film 330 may be formed of a material selected from the group consisting of a polyester type, a cyclic polyolefin (COP) type, a polycarbonate type, a polyether type A polyimide film, a polyimide film, a polyimide film, a polyimide film, a polyimide film, a polyimide film, a polyimide film, a polyimide film, a polyarylene film, a polyarylate film, a polyvinyl alcohol film, a polyvinyl chloride film, a polyvinylidene chloride film or a mixture thereof. Preferably a protective film having no retardation, more preferably a triacetylcellulose film having no retardation.

The second adhesive layer 340 may be a PSA layer and may be formed on the lower surface of a liquid crystal display panel (LCD CELL). The second adhesive layer 340 is an adhesive layer containing a (meth) acrylic copolymer and may have a thickness of 2 to 5 占 퐉.

The liquid crystal display device according to another aspect of the present invention may include the liquid crystal display device module.

3 is a cross-sectional view of a liquid crystal display device according to one embodiment of the present invention. 3, the liquid crystal display device 600 may include the liquid crystal display module 400 and the light source unit 500. The light source unit 500 may include a backlight unit including a light source, a light guide plate, a prism sheet, . ≪ / RTI >

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

Specific specifications of the components used in the following examples and comparative examples are as follows.

(1) Polyvinyl alcohol film: VF-PS6000 (Japan Kuraray Co., thickness: 60 탆)

(2) Polycarbonate resin having the general formulas (1) and (2): D7430 (thickness: 40 탆, photoelastic coefficient: 70 x 10 ^-12 Pa ^-1 )

(3) Acrylic resin: VH001 (Daesan MMA, thickness: 5 to 20 탆, photoelastic coefficient: 5 x 10 ^-12 Pa ^-1 )

       (4) PVA protective film triacetylcellulose film: KC4UY (KODAK)

(5) Hard coating layer: Manufacturer: TOYOBO

Example  One

The polyvinyl alcohol film was stretched three times at 60 DEG C, adsorbed iodine, and then stretched 2.5 times in an aqueous boric acid solution at 40 DEG C to prepare a polarizer (thickness: 40 mu m). The polycarbonate resin and the acrylic resin were melted and co-extruded, respectively, to produce a double-layered, integral-type protective film in which a polycarbonate resin layer (thickness: 30 μm) and an acrylic resin layer (thickness: 10 μm) were laminated.

The protective film of the double layer was bonded with an adhesive so that the polycarbonate resin layer was in contact with the polarizer on the upper surface of the polarizer, and the triacetyl cellulose film was bonded to the lower surface of the polarizer with an adhesive to prepare a polarizing plate.

Comparative Example  One

A polarizing plate was produced in the same manner as in Example 1 except that a film made of a polycarbonate resin was used in place of the protective film of the double layer.

Comparative Example  2

A polarizing plate was produced in the same manner as in Example 1 except that a film made of only acrylic resin was used in place of the protective film of the double layer.

Comparative Example  3

A polarizing plate was produced in the same manner as in Example 1 except that a film having a hard coating layer formed on a polycarbonate resin film was used in place of the protective film of the double layer.

Comparative Example  4

A polarizing plate was produced in the same manner as in Example 1 except that the double-layered protective film was adhered so that the acrylic resin layer was in contact with the upper surface of the polarizer.

The protective films used in the Examples and Comparative Examples and the polarizing plates produced therefrom were evaluated for the following properties.

(1) Photoelasticity Coefficient: The retardation value at the center of the sample was set at 23 占 폚 while applying a stress (1 to 15 N) while sandwiching both ends of a protective film sample (size 1.5 cm x 10 cm x 40 m, It was measured using a KOBRA phase difference meter at 590 nm and calculated from the slope of the function of the stress and the retardation value.

(2) Surface Hardness: The pencil hardness was measured using a pencil hardness tester (Shinto Scientific, Heidon) with a Mitsubishi evaluation pencil (UNI) at a load of 500 kg / cm ² at a rate of 48 mm / min. The object of measurement of the surface hardness was measured for the outermost layer of the upper protective film of the polarizing plate.

(3) Chemical resistance: Either of ethanol (EtOH), ethyl acetate (EA), methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK) or isopropyl alcohol (IPA) A few drops were dropped on the layer with a syringe, left for 60 minutes, and wiped off. The results were evaluated as "good" when the protective film was not discolored, "slightly discolored" when it was slightly discolored, and "discolored" when it was discolored.

(4) Moisture permeability: A protective film (size 1.5 cm x 10 cm x 40 m, width x length x thickness) was put in a cup for measuring water vapor (WATER VAPOR PERMEABILITY CUP No.318, YASUDA) . The specimens were allowed to stand at 40 DEG C and 95% relative humidity for 24 hours and the weight of the specimens was measured. The moisture permeability was calculated by the following formula (1).

<Formula 1>

(5) Durability: Measured with a UV spectrometer at a wavelength of 370 nm, and the measurement standard is JIS K7136-1. When the protective film was not discolored, it was evaluated as &quot; good &quot;. When the protective film was discolored, it was evaluated as &quot; discoloration. &Quot;

(6) Ro and Rth: A protective film sample (size 3 cm x 3 cm x 40 m, width x length x thickness) was measured by using an Axoscan apparatus to determine Ro and Rth at a wavelength of 550 nm.

Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Protective Film Composition A double layer made of a polycarbonate resin layer and an acrylic resin layer The polycarbonate resin layer Acrylic resin layer A polycarbonate resin layer having a hard coat layer formed thereon A double layer made of a polycarbonate resin layer and an acrylic resin layer Photoelastic coefficient (Pa ^-1 ) 10 x 10 ^-12 70 x 10 ^-12 5 x 10 ^-12 70 x 10 ^-12 10 x 10 ^-12 Surface hardness Measured object Acrylic resin layer The polycarbonate resin layer Acrylic resin layer Hard coating layer The polycarbonate resin layer Measures     2 ~ 3B     6 ~ 7B     B ~ 2B      B to H     5 ~ 6B Chemical resistance EtOH Good Good Good Good Good EA Good discoloration Slight discoloration Good  Good MEK Good discoloration discoloration discoloration discoloration MIBK Good discoloration discoloration discoloration discoloration IPA Good Good Good Good Good Water vapor permeability (g / m ² ㆍ 24 hr)       55       60       40       60       - durability  Good  discoloration Good Good - Ro (nm) 7 20 One 20 - Rth (nm) 26 68 2 68 -

As shown in Table 1, it was confirmed that the polarizing plate of the present invention had low photoelasticity, excellent surface hardness, excellent durability and chemical resistance. On the other hand, Comparative Example 1 in which the acrylic resin layer was not provided had low surface hardness and poor chemical resistance, and Comparative Example 2 in which the polycarbonate resin layer was not provided had poor chemical resistance, and the hard coat layer Comparative Example 3 also had poor chemical resistance and Comparative Example 4, in which the polycarbonate resin layer was the outermost layer, had poor surface hardness.

Claims (14)

A polarizer; And a bi-layer protective film formed on the upper surface of the polarizer,
Wherein the protective film has a photoelastic coefficient of 10 x 10 ^-12 to 20 x 10 ^-12 Pa- ¹ at 23 ° C and a wavelength of 590 nm, a surface hardness of 2B or more,
Wherein the protective film has an in-plane retardation (Ro) of 3 to 10 nm at a wavelength of 550 nm. delete The polarizer according to claim 1, wherein the protective film has a moisture permeability of 50 to 100 g / m ² .24 hr measured at 40 ° C and 95% relative humidity for 24 hours. The polarizing plate according to claim 1, wherein the protective film has a thickness of 40 to 80 탆. The polarizing plate according to claim 1, wherein the bilayer comprises a polycarbonate resin layer having a unit of the following formula (1) and a unit of the following formula (2), and a non-polycarbonate resin layer formed on one surface of the polycarbonate resin layer:
&Lt; Formula 1 >

(2)

(Wherein A is -CH ₂ -Y-CH ₂ - and Y is a cycloalkylene group having 4-20 carbon atoms or a structure represented by the following formula 3
(3)

(Wherein * is -CH ₂ of the A - and connections for, R _1, R _2, R _3, R ₄ are the same or different, each independently represent hydrogen or an alkyl group having a carbon number of 1-5). 6. The polarizer according to claim 5, wherein the polycarbonate resin layer is formed on an upper surface of the polarizer, and the non-polycarbonate resin layer is formed on an upper surface of the polycarbonate resin layer. 6. The non-aqueous electrolyte secondary battery according to claim 5, wherein the non-polycarbonate resin layer is at least one selected from the group consisting of acrylic, cellulose, polyester, cyclic polyolefin (COP), polyether sulfone, polysulfone, polyamide, polyimide, , A polyarylate resin, a polyvinyl alcohol resin, a polyvinyl chloride resin, and a polyvinylidene chloride resin. The polarizing plate according to claim 5, wherein the ratio (T1 / T2) of the thickness (T1) of the polycarbonate resin layer to the thickness (T2) of the non-polycarbonate resin layer is 1 to 9. 6. The method according to claim 5, wherein the ratio of the photoelastic coefficient (C1) at 23 DEG C and the wavelength 590 nm of the polycarbonate resin layer to the photoelastic coefficient (C2) at 23 DEG C, ) Is from 5 to 25. The polarizer according to claim 5, wherein the polycarbonate resin layer and the non-polycarbonate resin layer are integrated. The polarizer of claim 1, wherein at least one of a protective film and a retardation film is further formed on a lower surface of the polarizer. The polarizer of claim 6, further comprising a hard coating layer on the upper surface of the non-polycarbonate resin layer. A module for a liquid crystal display device comprising the polarizing plate of any one of claims 1 to 12. A liquid crystal display device comprising the liquid crystal display module according to claim 13.

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