KR102253712B1 - Polarizing plate and optical display device comprising the same - Google Patents

Abstract

A polarizing plate comprising a display area and a non-display area surrounding the display area, wherein the polarizing plate includes a polarizer and an adhesive layer and a first polarizer protective film sequentially stacked on one surface of the polarizer, and at least a portion of the non-display area A light-shielding layer forming a is formed in the lower surface of the first polarizer protective film and in the adhesive layer, and the light-shielding layer is one or more organic dyes of tris phenylene aminiium dyes, tetrakis phenylene aminiium dyes, or zwitterions thereof A polarizing plate including a compound and an optical display device including the same are provided.

Description

Polarizing plate and optical display device including the same {POLARIZING PLATE AND OPTICAL DISPLAY DEVICE COMPRISING THE SAME}

The present invention relates to a polarizing plate and an optical display device including the same.

The optical display device is composed of a display area and a non-display area. The display area is light transmissive so that an image can be visually recognized through the screen. The non-display area is an area located at the edge of the display area and surrounding the display area. The non-display area prevents the user of the optical display device from visually recognizing the printed circuit board and the driving chip. The non-display area was implemented by a plastic frame.

Recently, a technology in which a light shielding layer is used instead of a plastic frame as an integrated polarizing plate printed on a polarizer protective film is being developed.

An optical display device can be manufactured using a polarizing plate and a panel having such a light-shielding layer formed thereon. Generally, the polarizing plate is supplied in a larger size than the panel. Therefore, after attaching the polarizing plate and the panel based on one of the four sides of the polarizing plate on which the light-shielding layer is formed, the polarizing plate protruding from the panel is cut using a laser. At this time, the exact position to be cut is selected by recognizing an alignment mark displayed under the polarizing plate in the optical display manufacturing apparatus.

A typical polarizing plate has no problem in recognizing an alignment mark because a certain degree of light transmittance is secured in the visible light region. However, the light shielding layer has a problem in recognizing an alignment mark because the transmittance of the light-shielding layer is remarkably lowered in the visible light region and the infrared region. However, if an arbitrary dye is included in the light-shielding layer, the light-shielding effect of the light-shielding layer may be lowered due to lower OD (optical density) in the visible light region, and the adhesion of the light-shielding layer to the polarizer protective film, and the light-shielding layer to the polarizer and the adhesive layer. There is a problem in that it cannot function as a light-shielding layer because of poor adhesion and poor reliability and durability. The "OD" is an index for evaluating the light-shielding property, and the higher the OD value, the better the light-shielding property.

The background technology of the present invention is disclosed in Korean Patent Application Publication No. 2015-0015243 and the like.

An object of the present invention is to provide a polarizing plate having a light-shielding layer that has excellent light-shielding properties and has excellent light transmittance in an infrared region, and thus increases an alignment mark recognition rate when cutting after bonding to a panel, thereby enabling effective cutting.

Another object of the present invention is to provide a polarizing plate having a light-shielding layer having excellent adhesion to a polarizer protective film.

Another object of the present invention is to provide a polarizing plate having a light-shielding layer having excellent adhesion to a polarizer and an adhesive layer among the polarizing plates.

Another object of the present invention is to provide a polarizing plate having excellent reliability and durability.

The polarizing plate of the present invention is a polarizing plate composed of a display area and a non-display area surrounding the display area, and the polarizing plate includes a polarizer and an adhesive layer and a first polarizer protective film sequentially stacked on one surface of the polarizer, and the non- A light-shielding layer forming at least a part of the display area is formed in the lower surface of the first polarizer protective film and in the adhesive layer, and the light-shielding layer is an organic dye of at least one of a tris phenylene aminiium dye and a tetrakis phenylene aminiium dye Or it may include a zwitterion compound.

The optical display device of the present invention may include the polarizing plate of the present invention.

The present invention provides a polarizing plate having a light-shielding layer, which has excellent light-shielding properties and has excellent light transmittance in an infrared region, and thus increases an alignment mark recognition rate when cutting after bonding to a panel, thereby enabling effective cutting.

The present invention provides a polarizing plate having a light-shielding layer having excellent adhesion to a polarizer protective film.

The present invention provides a polarizing plate including a light-shielding layer having excellent adhesion to a polarizer and an adhesive layer among the polarizing plates.

The present invention provides a polarizing plate excellent in reliability and durability.

1 is a plan view of a polarizing plate according to an embodiment of the present invention.
2 is an I-II cross-sectional view of a polarizing plate according to an exemplary embodiment of the present invention.
3 is an enlarged cross-sectional view of a printing pattern formed on a light-shielding layer in I-II of a polarizing plate according to an embodiment of the present invention.
4 is an enlarged cross-sectional view of a printed pattern formed on a light-shielding layer among polarizing plates according to another embodiment of the present invention.

It will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention by examples. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and the same reference numerals are assigned to the same or similar components throughout the specification.

In the present specification, "upper part" and "lower part" are defined based on the drawings, and "upper part" may be changed to "lower part" and "lower part" may be changed to "upper part" according to the viewpoint of the view, and "on" or What is referred to as "on" may include a case where other structures are interposed not only above but also in the middle. On the other hand, to be referred to as "directly on", "directly on", or "directly formed" or "directly formed in contact" means that no other structure is interposed therebetween.

The polarizing plate of the present invention may include a display area and a non-display area surrounding the outside of the display area. The polarizing plate may include a polarizer, an adhesive layer sequentially stacked on an upper surface of the polarizer, and a first polarizer protective film. A light-shielding layer is further formed on the polarizing plate. The light blocking layer forms at least a part of the non-display area, is formed on the lower surface of the first polarizer protective film and is formed in the adhesive layer, so that the polarizer, the light blocking layer, the adhesive layer, and the first polarizer protective film are integrally formed. . In the polarizing plate of the present invention, since the light shielding layer is formed in the adhesive layer, the optical display device can be made thinner.

The polarizing plate may have a light transmittance of 30% or more at a wavelength of 950 nm in the non-display area in which the light blocking layer is provided. In the process of cutting the polarizing plate according to the size of the panel after bonding the polarizing plate to the panel in the light transmittance range, the alignment mark recognition rate may be increased, thereby effectively cutting the polarizing plate. The polarizing plate may have an OD value of 2.0 or more in the visible light region in the non-display region in which the light blocking layer is provided. In the range of the OD value, the light blocking layer may serve as a non-display area.

Preferably, the polarizing plate may have a light transmittance of 30% to 80%, more preferably 30% to 70% at a wavelength of 950 nm in the non-display area in which the light shielding layer is provided.

Preferably, the polarizing plate may have an OD value of 2.0 to 4.0, more preferably 2.0 to 3.0 in the visible light region in the non-display region in which the light blocking layer is provided. In the above range, it may be easy to simultaneously reach a light transmittance at a wavelength of 950 nm that can increase the alignment mark recognition rate and an OD value that provides a light blocking effect.

The inventors of the present invention provide that the polarizing plate secures the light transmittance at the above-described wavelength of 950 nm, the light shielding layer secures the OD value described above, the adhesion of the light shielding layer to the first polarizer protective film, and the polarizer and the adhesive layer of the light shielding layer. As a result of studying the configuration of the light-shielding layer so as to secure adhesion with the light-shielding layer, it was confirmed that the effect of the present invention can be obtained by including the specific dye described below in the light-shielding layer. In the polarizing plate of the present invention, not only the light shielding layer has excellent adhesion to the first polarizer protective film, but also excellent adhesion to the polarizer and the adhesive layer, thereby improving reliability and durability.

Hereinafter, a polarizing plate according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. 1 is a plan view of a polarizing plate according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view of a polarizing plate according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the polarizing plate 10 includes a display area S1; And a non-display area S2 formed to surround an outer edge, that is, an edge of the display area S1. The display area S1 is a light transmissive area, and the non-display area S2 is a light non-transmissive area. The display area S1 and the non-display area S2 are integrally formed.

Although not shown in FIG. 1, the non-display area S2 is formed of a light blocking layer. The light-shielding layer may be formed of a composition for a light-shielding layer including a dye described below. The composition for a light-shielding layer is described in detail below.

In FIG. 1, the non-display area S2 is formed to surround the entire edge of the display area S1, but the present invention is not limited thereto. The non-display area may be located only at both edges of the display area, and the non-display area may be located only at the left edge, right edge, upper edge, or lower edge of the display area.

Referring to FIG. 2, in the polarizing plate 10, an adhesive layer 310 and a first polarizer protective film 200 are sequentially formed on the upper surface of the polarizer 100, and the second polarizer is protected on the lower surface of the polarizer 100. A film 400 is formed.

The polarizing plate may be a polarizing plate disposed on the viewer side when mounted on the optical display device. Accordingly, the adhesive layer 310 and the first polarizer protective film 200 are sequentially formed on the light exit surface of the polarizer 100. However, the present invention is not limited thereto.

A light blocking layer 320 is formed on the lower surface of the first polarizer protective film 200 and in the adhesive layer 310. The light blocking layer 320 is formed to directly contact the lower surface of the first polarizer protective film 200 and the adhesive layer 310. As shown in FIG. 2, the light blocking layer 320 is formed to surround the edge of the adhesive layer 310. When the polarizing plate of the present invention is mounted on the optical display device, the light blocking layer 320 may form at least a part of the non-display area S2, preferably the entire non-display area.

The light blocking layer 320 is formed on the light exit surface of the polarizer 100. Accordingly, a display function may be implemented in a portion of the polarizing plate in which the light blocking layer 320 is not formed. However, the case where the light blocking layer 320 is formed on the light incident surface of the polarizer 100 may also be included in the scope of the present invention.

The polarizing plate 10 may have a light transmittance of 30% or more at a wavelength of 950 nm in a non-display area in which the light blocking layer is provided. In addition, the polarizing plate 10 may have an OD value of 2.0 or more in the visible light region in the non-display region in which the light blocking layer is provided. In the process of cutting the polarizing plate according to the size of the panel after bonding the polarizing plate to the panel in the light transmittance range, the alignment mark recognition rate may be increased, thereby effectively cutting the polarizing plate. In the range of the OD value, the light blocking layer may serve as a non-display area. Preferably, the polarizing plate may have a light transmittance of 30% to 80%, more preferably 30% to 70% at a wavelength of 950 nm in the non-display area in which the light shielding layer is provided. Preferably, the polarizing plate 10 may have an OD value of 2.0 to 4.0, more preferably 2.0 to 3.0 in the visible light region in the non-display region in which the light blocking layer is provided. In the above range, it may be easy to simultaneously reach a light transmittance at a wavelength of 950 nm that can increase the alignment mark recognition rate and an OD value that provides a light blocking effect.

The light blocking layer 320 has excellent adhesion to the first polarizer protective film 200. Through this, it is possible to improve the reliability and durability of the polarizing plate. The light blocking layer 320 has excellent adhesion to the polarizer 100 and the adhesive layer 310. Through this, it is possible to improve the reliability and durability of the polarizing plate.

The light-shielding layer is an organic dye, and may include at least one organic dye or a zwitterion compound thereof among tris phenylene aminium-based dyes, tetrakis phenylene aminium-based dyes. The organic dye can ensure light transmittance and OD value at a wavelength of 950 nm of the present invention when the light-shielding layers described below are formed of printed patterns spaced apart from each other, and adhesion to the first polarizer protective film, polarizer and adhesive layer It can be made to have excellent adhesion to. The "tris phenylene aminiium" refers to an amine-based cation having three phenyl groups, and the "tetrakis phenylene aminiium" refers to an amine-based cation having four phenyl groups.

In one embodiment, the light shielding layer may include one or more dyes of the following Formula 1, the following Formula 2, and the following Formula 3, or a zwitterionic compound thereof:

<Formula 1>

(In Chemical Formula 1,

Each R is independently an alkylene group having 1 to 5 carbon atoms,

R ¹ is each independently H ⁺ , an alkali metal monovalent cation, an alkyl ammonium monovalent cation, or an ammonium monovalent cation,

X ^- is _{^{NO 3 -, Cl -, Br}} -, BF 4 -, PF 6 -, or SbF ₆ ^- a)

<Formula 2>

(In Chemical Formula 2,

Each R is independently an alkylene group having 1 to 5 carbon atoms,

R ¹ is each independently H ⁺ , an alkali metal monovalent cation, an alkyl ammonium monovalent cation, or an ammonium monovalent cation,

X ^- is _{^{NO 3 -, Cl -, Br}} -, BF 4 -, PF 6 -, or SbF ₆ ^- a)

<Formula 3>

(In Chemical Formula 3,

Each R is independently an alkylene group having 1 to 5 carbon atoms,

R ¹ is each independently H ⁺ , an alkali metal monovalent cation, an alkyl ammonium monovalent cation, or an ammonium monovalent cation,

X ^- is _{^{NO 3 -, Cl -, Br}} -, BF 4 -, PF 6 -, or SbF ₆ ^- a)

Preferably, each R is independently an ethylene group.

Preferably, ^{each of R 1} is independently Na ⁺ , K ⁺ , NH ₄ ⁺ , (R ₅ ) ₄ N ⁺ , (R ₅ ) ₃ NH ⁺ , (R ₅ ) ₂ NH ₂ ⁺ . At this time, R ₅ is an alkyl group having 1 to 10 carbon atoms.

The zwitterionic compound of Formula 1 may be represented by the following Formula 1-1:

<Formula 1-1>

(In Chemical Formula 1-1, R, R ¹ and X ^- are as defined in Chemical Formula 1).

The zwitterionic compound of Formula 2 may be represented by Formula 2-1:

<Formula 2-1>

(In Chemical Formula 2-1, R, R ¹ and X ^- are as defined in Chemical Formula 2).

The zwitterionic compound of Formula 3 may be represented by the following Formula 3-1:

<Formula 3-1>

(In Chemical Formula 3-1, R, R ¹ and X ^- are as defined in Chemical Formula 3).

Since the light-shielding layer includes the dye, the light transmittance at a wavelength of 950 nm of the polarizing plate is 30% or more in the non-display area with the light-shielding layer, and the OD value of the polarizing plate is 2.0 or more in the non-display area with the light-shielding layer. It can be made to be, and the adhesion to the first polarizer protective film, the adhesion to the polarizer and the adhesive layer may be excellent. The dye may be synthesized by a conventional method known to those skilled in the art, or commercially available products (eg, Specter ^TM 130, Specter ^TM 140, Specter ^TM 150, Specter ^TM 160, or higher Epolin) may be used.

The dye may be included in an amount of 30% to 80% by weight, preferably 40% to 80% by weight of the light shielding layer. In the above range, the light shielding layer may exert a light blocking effect, excellent adhesion to the first polarizer protective film, adhesion to the polarizer and the adhesive layer, and securing light transmittance at a wavelength of 950 nm.

The light-shielding layer may include a composition for a light-shielding layer containing the dye or may be formed of a composition for a light-shielding layer containing the dye.

In one embodiment, the composition for a light-shielding layer may include at least one dye of Formula 1, Formula 2, and Formula 3, or a zwitterionic compound thereof; Binder resin; And an initiator. At this time, at least one dye or zwitterionic compound thereof in Formula 1, Formula 2, and Formula 3 is in the range of 30% to 80% by weight, preferably 40% to 80% by weight, based on solid content. Can be included. In the above range, the light shielding layer can exert a light shielding effect, excellent adhesion to the first polarizer protective film, and secure light transmittance at a wavelength of 950 nm.

The binder resin may include an acrylic resin, a polyimide resin, a polyurethane resin, or a combination thereof. Examples of the acrylic resin include methacrylic acid/benzyl methacrylate copolymer, methacrylic acid/benzyl methacrylate/styrene copolymer, methacrylic acid/benzyl methacrylate/2-hydroxyethyl methacrylate copolymer, and methacrylic acid/benzyl methacrylate/styrene copolymer. And acrylic acid/benzyl methacrylate/styrene/2-hydroxyethyl methacrylate copolymer. The polyurethane-based resin may be an aliphatic polyurethane-based resin. The acrylic resin may be an acrylic pressure-sensitive adhesive resin. However, it is not limited thereto.

The reactive unsaturated compound is a compound having a low weight average molecular weight compared to the binder resin, and may include at least one of a photocurable unsaturated compound and a thermosetting unsaturated compound. Reactive unsaturated compounds include ethylene glycol diacrylate, ethylene glycol dimethacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, triethylene glycol dimethacrylate, 1,6-hexanediol diacrylate, 1 ,6-hexanediol dimethacrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate Rate, bisphenol A epoxy (meth) acrylate, ethylene glycol monomethyl ether (meth) acrylate, trimethylolpropane tri (meth) acrylate, tris (meth) acryloyloxyethyl phosphate, etc., but are limited thereto. It is not.

The initiator may include at least one of a photopolymerization initiator and a thermosetting initiator. Examples of the photopolymerization initiator include acetophenone-based compounds, benzophenone-based compounds, thioxanthone-based compounds, benzoin-based compounds, triazine-based compounds, and morpholine-based compounds, but are not limited thereto. As a thermosetting initiator, for example, 1,3-bis (hydrazinocarbonoethyl-5-isopropylhydantoin) as a hydrazide-based compound, 1-cyanoethyl-2-phenylimidazole as an imidazole-based compound , N-[2-(2-methyl-1-imidazolyl)ethyl]urea, 2,4-diamino-6-[2'-methylimidazolyl-(1')]-ethyl-s-tri Azine, N,N'-bis(2-methyl-1-imidazolylethyl)urea, N,N'-(2-methyl-1-imidazolylethyl)-adipoamide, 2-phenyl-4- Methyl-5-hydroxymethylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, tetrahydrophthalic anhydride as an acid anhydride compound, ethylene glycol-bis (anhydrotrimelitate), melamine It may include at least one selected from the group consisting of a compound based on a compound, a guanidine compound, a dicyandiamide compound, and a modified aliphatic polyamine compound.

Examples of the solvent include glycol ethers such as ethylene glycol methyl ether, ethylene glycol ethyl ether, and propylene glycol methyl ether; Cellosolve acetates such as methyl cellosolve acetate, ethyl cellosolve acetate, and diethyl cellosolve acetate; Carbitols such as methyl ethyl carbitol, diethyl carbitol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, and diethylene glycol diethyl ether; Propylene glycol alkyl ether acetates such as propylene glycol methyl ether acetate and propylene glycol propyl ether acetate; And the like, but are not limited thereto.

In one embodiment, the composition for a light shielding layer is 1 to 50% by weight of one or more dyes or zwitterionic compounds thereof in Chemical Formulas 1, 2, and 3, 0.5 to 20% by weight of a binder resin, and 0.1 to 10% by weight of an initiator % And the balance of the solvent. While forming a thin light-shielding layer in the above range, excellent light-shielding effect may be exhibited.

In another embodiment, the composition for a light-shielding layer is 1 to 50% by weight of one or more dyes or zwitterionic compounds thereof in Chemical Formulas 1, 2, and 3, 0.5 to 20% by weight of a binder resin, and 1 to 1% by weight of a reactive unsaturated compound. It may contain 20% by weight, 0.1 to 10% by weight of the initiator, and the remainder of the solvent. While forming a thin light-shielding layer in the above range, excellent light-shielding effect may be exhibited.

In addition to the above components, the composition for the light-shielding layer may include 0.1 to 1% by weight of other additives, and examples of the other additives include a silane coupling agent, thereby helping UV curing of the light-shielding layer.

In another embodiment, the composition for a light-shielding layer may include at least one organic dye or zwitterionic compound (hereinafter, a dye) of Chemical Formula 1, Chemical Formula 2, and Chemical Formula 3; One or more inorganic pigments (hereinafter, pigments) among mixed pigments of carbon black and silver-tin-containing alloys; Binder resin; And an initiator. By including the mixture of the dye and the pigment, the OD value is higher, so that the light-shielding effect is more excellent, and there may be an effect of improving adhesion. The carbon black may include, for example, graphitized carbon, furnace black, acetylene black, ketjen black, and the like, but is not limited thereto. The pigment may be included as a pigment dispersion, but is not limited thereto. The composition for a light-shielding layer may further include one or more of a reactive unsaturated compound, a solvent, and an additive.

In the mixture of the dye and the pigment, the dye may be included in an amount of 20% to 90% by weight, and the pigment may be included in an amount of 10% to 80% by weight. In the above range, the light shielding layer can exert a light shielding effect, excellent adhesion to the first polarizer protective film, and secure light transmittance at a wavelength of 950 nm. Preferably, the dye is 50% to 90% by weight, the pigment is 10% to 50% by weight, more preferably the dye is 55% to 90% by weight, the pigment is 10% to 45% by weight Can be included as. In this case, the mixture of the dye and the pigment may be included in an amount of 30% to 80% by weight, preferably 40% to 80% by weight of the composition for a light shielding layer based on solid content. In the above range, the light shielding layer can exert a light shielding effect, excellent adhesion to the first polarizer protective film, and secure light transmittance at a wavelength of 950 nm.

When the light-shielding layer includes a mixture of the dye and the pigment, the dye is 10% to 50% by weight of the light-shielding layer, preferably 30% to 50% by weight, and the pigment is 10% by weight of the light-shielding layer % To 50% by weight, preferably 20% to 40% by weight may be included. In the above range, the light shielding layer can exert a light shielding effect, excellent adhesion to the first polarizer protective film, and secure light transmittance at a wavelength of 950 nm.

Details of the binder resin, initiator, reactive unsaturated compound, solvent, and additive are as described above.

In one embodiment, the composition for a light-shielding layer may include 1 to 50% by weight of a mixture of the dye and the pigment, 0.5 to 20% by weight of a binder resin, 0.1 to 10% by weight of an initiator, and the remainder of the solvent. While forming a thin light-shielding layer in the above range, excellent light-shielding effect may be exhibited.

In another embodiment, the composition for a light-shielding layer is 1 to 50% by weight of a mixture of the dye and the pigment, 0.5 to 20% by weight of a binder resin, 1 to 20% by weight of a reactive unsaturated compound, 0.1 to 10% by weight of an initiator, and residual It may contain negative solvents. While forming a thin light-shielding layer in the above range, excellent light-shielding effect may be exhibited.

In addition to the above components, the composition for the light-shielding layer may include 0.1 to 1% by weight of other additives, and examples of the other additives include a silane coupling agent, thereby helping UV curing of the light-shielding layer.

The thickness of the light blocking layer 320 may be smaller than or equal to the thickness of the adhesive layer 310. The thickness of the light blocking layer 320 may be 50% to 100% of the thickness of the adhesive layer 310. In the above range, it may be included in the adhesive layer, and the polarizing plate may be thinned. For example, the thickness of the light shielding layer 320 may be 0.1 μm to 4 μm, preferably 1.0 μm to 4.0 μm. In the above range, it may be included in the adhesive layer, it is possible to secure light-shielding property, and it is possible to thin the polarizing plate.

The light blocking layer 320 is made of a printed pattern formed to be spaced apart from each other. The print pattern will be described in detail with reference to FIG. 3.

Referring to FIG. 3, a point where the print pattern 320 ′ contacts the boundary between the display area S1 and the non-display area S2 is a, and another print pattern 320 ′ immediately adjacent to the print pattern 320 ′. When b is a point in contact with the boundary surface (or boundary line) between the display area S1 and the non-display area S2, the distance between a and b is called W. When c is the closest point from a in the print pattern 320' and d is the closest point from b in the print pattern 320', from the interface between the display area S1 and the non-display area S2 to c H is the minimum of the distance of and the distance from the boundary between the display area S1 and the non-display area S2 to d. H may be 200 μm or less, for example, 0.1 μm to 200 μm, and 5 μm to 200 μm. In the above range, a light-shielding effect is obtained and the uniformity between the display area and the non-display area is high, so that the difference in visibility is small and RGB in the pixel may not be visually recognized. In one embodiment, the print pattern may satisfy the relationship of Equation 1:

<Equation 1>

0.1 x W ≤ H ≤ 0.5 x W

Equation 1 shows that in a print pattern immediately adjacent to the boundary between the display area and the non-display area, the uniformity is a problem at the interface, but it is to ensure the uniformity at the interface. W may be 10㎛ to 500㎛, for example 10㎛ to 490㎛, 10㎛ to 480㎛. Can be W> H.

In the present specification, the "interface between the display area and the non-display area" means a virtual surface in which a plurality of points of a printing pattern closest to the display area are connected among the printing patterns formed in the non-display area.

The printing patterns 320' are formed to be spaced apart from each other. The separation distance T between the printed patterns 320 ′ may be 1 μm to 50 μm, for example, 5 μm to 30 μm. In the above range, a light blocking effect may be produced and uniformity may not be affected.

The length of the maximum long axis 320'L of the print pattern 320' may be 50 µm to 600 µm, for example, 100 µm to 500 µm.

3 shows a case in which the printed pattern 320' has a regular hexagonal shape in a cross-sectional shape in the plane direction. However, the present invention is not limited thereto, and the cross-sectional shape in the plane direction may be an N-shaped (N is an integer of 3 to 10), such as a rhombus, a regular hexagon, an octagonal shape, a circular shape, an oval shape, and an amorphous shape. The length of one side constituting the cross-sectional shape in the plane direction of the printing pattern 320 ′ may be the same or different, and may be 10 μm to 400 μm, for example, 50 μm to 300 μm. In one embodiment, the cross section in the plane direction of the printing pattern may be a rhombus, a regular hexagon, or an amorphous shape.

3 shows a case where the printed patterns formed on the light-shielding layer 320 are the same size and have the same shape. However, the print patterns may have different sizes or different shapes.

3 shows a case in which the printing pattern formed on the light blocking layer 320 is formed as a single layer. However, printing patterns of different shapes may be formed in multiple layers. This will be described with reference to FIG. 4 below.

For the light-shielding layer, the composition for the light-shielding layer is carried on a gravure roll (e.g., copper plate) processed to form the print pattern of the light-shielding layer, and the composition for the light-shielding layer on the non-printing surface is removed with a doctor blade, and then for the light-shielding layer supported on the first polarizer protective film. It can be formed by transferring and curing the composition. A printing pattern for forming a light-shielding layer is formed on the gravure roll.

The adhesive layer 310 may be interposed between the polarizer 100 and the first polarizer protective film 200 to bond the polarizer 100 and the first polarizer protective film 200 to each other. The adhesive layer 310 is formed directly on each of the polarizer 100 and the first polarizer protective film 200.

The adhesive layer 310 may be formed on at least one surface of each of the polarizer 100 and the first polarizer protective film 200. That is, the polarizer 100 and the first polarizer protective film 200 face each other, and they may have substantially the same area on a horizontal cross-section. That is, they may be completely overlapped with each other on a horizontal cross-section. In the case of the adhesive layer 310, it may be formed only in a part of them, and more specifically, the adhesive layer 310 is the polarizer 100 and the first polarizer protective film 200 It can be arranged in an island shape only in the center except for the border of.

The adhesive layer 310 bonds or laminates the polarizer 100 and the first polarizer protective film 200 to each other, and may be formed of a photocurable adhesive for this purpose.

The thickness of the adhesive layer 310 may be 2 μm to 5 μm. Within the above range, a gap between the polarizer 100 and the first polarizer protective film 200 by the light blocking layer 320 of the present invention may be filled, thereby improving durability of the polarizing plate. That is, between the polarizer 100 and the first polarizer protective film 200, a deviation between an area where the light blocking layer 320 exists and an area that does not exist can be minimized.

The first polarizer protective film 200 may be formed on one surface of the adhesive layer 310 to support the adhesive layer 310 and the polarizer 100. The first polarizer protective film 200 may be an optically transparent protective film. For example, the first polarizer protective film is polyester, acrylic, cyclic olefin polymer (COP), triacetyl including polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, etc. Cellulose esters including cellulose (TAC), polyvinyl acetate, polyvinyl chloride (PVC), polynorbornene, polycarbonate (PC), polyamide, polyacetal, polyphenylene ether, polyphenylene sulfide, poly It may be a film formed of one or more of sulfone, polyethersulfone, polyarylate, and polyimide. Preferably, it may be a polyethylene terephthalate (PET), a cyclic olefin polymer (COP), or a triacetylcellulose (TAC) film.

The first polarizer protective film 200 may have a thickness of 30 µm to 120 µm, specifically 20 µm to 80 µm. In the above range, it can be used for an optical display device. The first polarizer protective film 200 may be an isotropic film or a retardation film. The isotropic film is a film having an in-plane retardation Re (Re = (nx-ny) xd, nx, ny is the refractive index of the protective film in the slow axis direction and the fast axis direction at a wavelength of 500 nm, and d is the film thickness) at a wavelength of 550 nm. It may include. The retardation film may include a film having an in-plane retardation Re of more than 5 nm, for example, 10 nm to 15,000 nm at a wavelength of 550 nm.

The second polarizer protective film 400 may have the same or different material, thickness, and retardation as the first polarizer protective film 200 described above.

The polarizer 100 may be formed on the lower surface of the adhesive layer 310 to polarize incident light. The polarizer 100 may include a polarizer. The polarizer may include a conventional polarizer known to those skilled in the art. The polarizer 100 may have a thickness of 5 μm to 40 μm. In the above range, it can be used for an optical display device.

Although not shown in FIG. 2, an adhesive layer may be further formed on the lower surface of the second polarizer protective film 400. Although not shown in FIG. 2, a functional layer may be further formed on the upper surface of the first polarizer protective film 200. The functional layer provides additional functions to the polarizing plate, such as anti-finger, low reflection, anti-glare, anti-contamination, anti-reflection, At least one of diffusion and refraction functions may be provided.

Hereinafter, a polarizing plate according to another embodiment of the present invention will be described with reference to FIG. 4.

The polarizing plate of this embodiment is substantially the same as the polarizing plate of the embodiment of the present invention except that the printing pattern of FIG. 4 is provided instead of the printing pattern of FIG. 3.

Referring to FIG. 4, the light blocking layer may include a printing area composed of a plurality of printing patterns 323. The remaining areas 324 of the light blocking layer 320 excluding the printed area correspond to an unprinted area. The printing patterns 323 are formed to be spaced apart from each other. The printing pattern 323 is composed of a first printing pattern 321 and a second printing pattern 322 formed on (preferably on the upper surface) of the first printing pattern 321. The second printing pattern 322 may be formed directly on the first printing pattern 321. The second printing pattern 322 has a different pattern shape compared to the first printing pattern 321. Preferably, the second printing pattern 322 has a smaller area than the first printing pattern 321.

A point where the interface between the display area S1 and the non-display area S2 contacts the first printing pattern 321 is a, and a second printing pattern closest to the boundary between the display area S1 and the non-display area S2 ( When the point 322) is referred to as a', the shortest distance ΔL between a and a'may be 200 μm or less, preferably 0.1 μm to 200 μm, and more preferably 10 μm to 200 μm. In the above range, a light-shielding effect is obtained and the uniformity between the display area and the non-display area is high, so that the difference in visibility is small, and the RGB in the pixel may not be visually recognized.

In one embodiment, the difference between the length of the maximum long axis 321L of the first printing pattern 321 and the maximum long axis 322L of the second printing pattern 322 is 200 μm or less, preferably 0.1 μm to 200 μm, More preferably, it may be 10 μm to 200 μm. In the above range, a light-shielding effect can be obtained, the uniformity between the display area and the non-display area is high, so that the difference in visibility is small, and the RGB in the pixel may not be visually recognized. The length of the largest long axis 321L of the first printing pattern 321 is 50 μm to 600 μm, preferably 100 μm to 500 μm, and the maximum long axis 322L of the second printing pattern 322 is 50 μm to 500 μm. Μm, preferably 50 µm to 350 µm.

Referring to FIG. 4, the first printing pattern 321 may have a hexagonal shape, and the second printing pattern 322 may have a rhombus shape. However, the present invention is not limited thereto. For example, the first printing pattern may be an N-gonal shape such as an octagonal shape (N is an integer of 3 to 10), a circular shape, an oval shape, an amorphous shape, and the like, and the second printing pattern is an N-angular shape such as an octagonal shape (N is An integer of 3 to 10), circular, elliptical, amorphous, and the like. The lengths of one side constituting the first printing pattern 321 may be the same or different, respectively, and may be 10 μm to 400 μm, preferably 50 μm to 300 μm. The length of one side constituting the second printing pattern 322 may be the same or different, and may be 10 μm to 400 μm, preferably 50 μm to 300 μm.

In one embodiment, the length of one side constituting the first printing pattern 321 may be the same as or different from the length of one side constituting the second printing pattern 322. Preferably, the length of one side constituting the first printing pattern 321 may be the same as the length of one side constituting the second printing pattern 322.

In one embodiment, the first printing pattern 321 is a regular hexagon, the first printing pattern 321 is arranged in a honeycomb structure, and the second printing pattern 322 may be a rhombus or square.

The area of the second printing pattern 322 may be smaller than the area of the first printing pattern 321. Only then, the second printing pattern 322 can be formed on the first printing pattern 321. Preferably, the area ratio of the area of the first printing pattern 321 to the area of the second printing pattern 322 may be more than 1, preferably more than 100% and less than 3000%. In the above range, since the uniformity between the display area and the non-display area is high, the difference in visibility is small, and RGB in the pixel may not be visually recognized.

Preferably, the intersection of the first printing pattern 321 and the second printing pattern 322 may be at least two or more, preferably three or more. In this case, since the uniformity between the display area and the non-display area is high, the difference in visibility is small, and RGB in the pixel may not be visually recognized.

A point where the first printing pattern 321 contacts the boundary between the display area S1 and the non-display area S2 is a, and the first printing pattern 321 immediately adjacent to the first printing pattern 321 is the display area ( When b is the point in contact with the boundary between S1) and the non-display area S2, the distance between a and b is W. When c is the closest point from a in the first printing pattern 321 and d is the closest point from b in the first printing pattern 321, from the boundary between the display area S1 and the non-display area S2. The minimum value of the distance to c and the distance from the boundary between the display area S1 and the non-display area S2 to d is referred to as H. H may be 200 μm or less, for example 0.1 μm to 200 μm, preferably 5 μm to 200 μm. In the above range, a light-shielding effect is obtained and the uniformity between the display area and the non-display area is high, so that the difference in visibility is small and RGB in the pixel may not be visually recognized.

In one embodiment, the print pattern may satisfy the relationship of Equation 1:

<Equation 1>

0.1 x W ≤ H ≤ 0.5 x W

Equation 1 shows that in the first printing pattern immediately adjacent to the interface between the display area and the non-display area, the uniformity is a problem at the interface, but it is to ensure the uniformity at the interface. W may be 10㎛ to 500㎛, preferably 10㎛ to 490㎛, 10㎛ to 480㎛. Can be W> H.

Preferably, the first printing pattern is a regular hexagon, the first printing pattern is arranged in a honeycomb structure, and the second printing pattern may be a rhombus, a square, or a regular hexagon.

The printing patterns 323 are formed to be spaced apart from each other. The separation distance T between the printed patterns 323 may be 1 μm to 50 μm, preferably 5 μm to 30 μm. In the above range, a light blocking effect may be produced and uniformity may not be affected.

According to the present invention, an optical display device including the polarizing plate described above can be provided. The optical display device may include a liquid crystal display device, an organic light emitting device display device, and the like. The polarizing plate of the present invention may be disposed on a viewing side polarizing plate of a liquid crystal display device.

Hereinafter, the polarizing plate of the present invention will be described in more detail through Examples and Comparative Examples.

Example One

(A) Dye Specter ^TM 130 45% by weight, (B) As a binder resin (B-1) Aliphatic polyurethane type SUO-1000 8% by weight, (C) As a reactive unsaturated compound, Hannong Chemical Co., Ltd. Dipentaerythritol hexaacrylate of 3% by weight, (D) as an initiator (D-1) 3% by weight of IGR 369 as a photopolymerization initiator, (E) 40% by weight of propylene glycol methyl ether acetate as a solvent, (F) silane couple A composition for a light-shielding layer was prepared by mixing 1% by weight of 76 of Tego as a ring agent.

Example 2 to Example 6

In Example 1, a composition for a light-shielding layer was prepared in the same manner, except that the type and/or content of each component of the composition for a light-shielding layer was changed as shown in Table 1 below.

Comparative example 1 to Comparative example 4

In Example 1, a composition for a light-shielding layer was prepared in the same manner, except that the type and/or content of each component of the composition for a light-shielding layer was changed as shown in Table 1 below.

Example Comparative example One 2 3 4 5 6 One 2 3 4 (A) (A-1) 45 45 25 25 25 25 - - - - (A-2) - - 20 20 - - 25 25 20 - (A-3) - - - - 20 20 20 20 - 20 (A-4) - - - - - - - - 25 25 (B) (B-1) 8 - 8 - 8 - 8 - 8 - (B-2) - 8 - 8 - 8 - 8 - 8 (C) 3 3 3 3 3 3 3 3 3 3 (D) (D-1) 3 - 3 - 3 - 3 - 3 - (D-2) - 3 - 3 - 3 - 3 - 3 (E) 40 40 40 40 40 40 40 40 40 40 (F) One One One One One One One One One One total 100 100 100 100 100 100 100 100 100 100

(A-1): Specter ^TM 130 (Epolin)

(A-2): Pigment dispersion containing silver-tin alloy (Sumitomo Osaka Cement Co., Ltd., TMP-DC-1) (pigment solid content 30%, weight ratio of silver and tin = 7:3)

(A-3): Pigment dispersion containing carbon black (Sakata, CI-M-050)

(A-4): X-55 Perylene black (BASF): A mixture of Perylene-based organic dyes of the following formula

<Formula A>

(B-1): Aliphatic polyurethane type SUO-1000 from Shin-A T&C

(B-2): Acrylic pressure-sensitive adhesive resin (manufactured by Wooin Chemtech, WA-9263)

(C): Hannong Chemical Co., Ltd. dipentaerythritol hexaacrylate

(D-1): IGR 369

(D-2): Melamine curing agent (manufactured by Wooin Chemtech, M60)

(E): Propylene glycol methyl ether acetate

(F): Tego's 76

A polarizing plate was manufactured using the composition for a light-shielding layer of Examples and Comparative Examples.

A first printing pattern was formed by coating the composition for a light-shielding layer on the edge of one side of a polyethylene terephthalate (PET) film with a gravure coating. The printing roll is a regular hexagon as the first printing pattern, and they are spaced apart from each other and have a honeycomb structure in the shape of a honeycomb. The first printing pattern is a regular hexagon with a side length of 50 μm. After printing the first printing pattern, a second printing pattern was formed with another printing roll. The printing roll is a second printing pattern with a rhombus and a side length of 50 μm. At this time, the second printing pattern was formed on the first printing pattern, and the major axes of the first printing pattern and the second printing pattern were parallel to each other. Finally, a light shielding layer having the structure of FIG. 4 was formed. In Table 2 below, specific specifications of the printed pattern formed on the light-shielding layer are shown in Table 2 below.

In Example 1, Example 3, Example 5, and Comparative Example 1, after removing the solvent at 85° C. for 1 minute, the light-shielding layer (thickness: 2 μm) was formed by exposing it to light with a light amount of 650 mJ using a metal halide exposure machine and curing.

In Example 2, Example 4, Example 6, and Comparative Example 2, a light-shielding layer (thickness: 2 μm) was formed by heat curing at 85° C. for 2 minutes.

A polyvinyl alcohol film (thickness: 60 μm, degree of polymerization: 2400, degree of saponification: 99.0%, VF-PS6000, Japan Kuraray) was swollen in an aqueous solution at 25° C., and stretched while dyeing in a dyeing bath containing iodine ions at 30° C. . The dyed polyvinyl alcohol film was further stretched in an aqueous solution of boric acid at 55° C., so that the final stretching ratio was 6 times. The obtained polyvinyl alcohol film was dried in a 50° C. chamber for 3 minutes to prepare a polarizer (thickness: 12 μm).

Cycloolefin polymer film (ZB12-052125, Zeon), adhesive layer (OS-207, Soken) as an adhesive layer, the prepared polarizer, adhesive layer, and second polarizer protective film on the surface of the PET film on which the light-shielding layer is formed. ) Were sequentially stacked to prepare a polarizing plate.

1st printing pattern 2nd printing pattern △L(㎛) H(㎛) Difference between major axis length (㎛) W(㎛) shape Length of one side (㎛) Long axis length (㎛) shape Length of one side (㎛) Long axis length (㎛) Regular hexagon 50 100 rhombus 50 71 29 43 29 102

For the prepared polarizing plate, the physical properties of Table 4 were evaluated.

(1) Appearance: Contamination, pressing, etc. were observed in the light-shielding layer (length x width, 200 mm x 10 mm) using a 3-wavelength lamp. If no contamination or pressing was observed, it was judged as good, and when the area was more than 200 μm, it was judged as bad.

(2) Adhesion 1: A specimen was prepared by attaching the adhesive layer (OS-207, Soken) of the polarizing plates prepared in Examples and Comparative Examples to a glass plate as a medium. Among the non-display areas of the polarizing plate, the degree of tearing was evaluated when a knife was inserted between the surface of the PET film on which the light-shielding layer was formed and the polarizer and torn. And, it was evaluated according to Table 3 below. Adhesion 1 When evaluating, the polarizing plate has excellent reliability and durability when it is less than 1 point to be used.

Peel Criteria level Unremoved 0 Not torn Partial Peel 1 One Partial partial tearing Partial Peel 2 2 Partially separated, but torn. Peeling 1 3 Partially separated. Peeling 2 4 Completely well separated. Exfoliation 3 5 Separated by fingernails.

(3) Light-shielding property: The light-shielding layer in a polarizing plate was measured using a UV filter using an optical densitometer (TD-904: Gretag Macbeth) based on JIS K7651:1988. Evaluation in the light-shielding layer was determined by the absorbance value at a wavelength of 550 nm of a UV-visible spectrophotometer (JASC0-750). If the absorbance value was 0.3 or more, it was evaluated as good, and if the absorbance value was less than 0.3, it was evaluated as bad.

(4) OD (unit: no): OD was measured for the polarizing plate. The non-display area in which the light-shielding layer was formed of the polarizing plate was measured with X-Rite 300.

(5) Light transmittance at a wavelength of 950 nm (unit: %): The non-display area in which the light-shielding layer was formed among the polarizing plates was evaluated with a near-infrared spectrometer (VERTEX80 FT-IR spectrometer, manufactured by Bruker Optics).

(6) Whether the infrared wavelength camera is recognized: The light transmittance at a wavelength of 950 nm was measured using a near-infrared spectrometer (VERTEX80 FT-IR spectrometer, manufactured by Bruker Optics) for the non-display area in which the light-shielding layer was formed among the polarizing plates. Alignment mark recognition was evaluated based on transmittance. If the light transmittance at a wavelength of 950 nm was 30% or more, it was evaluated as'good', and if it was less than 30%, it was evaluated as'poor'.

(7) Adhesion 2 (unit: number): Adhesion 2 was evaluated by the (Cross hatch cut) evaluation method.

A light-shielding layer was formed by coating and curing the composition for a light-shielding layer on one surface of a polyethylene terephthalate (PET) film. It was cut into a square size of length x width (100mm x 100mm) and cut only the light-shielding layer portion into 10 horizontally and vertically 10 pieces to prepare 100 fractions. When the adhesive tape was adhered on the light-shielding layer and released vertically, the number of fractions remaining without falling off was counted. The greater the number of remaining fractions, the better the adhesion of the light-shielding layer to the protective film. When the number of remaining fractions is more than 95, the reliability and durability of the polarizing plate are excellent and can be used.

Example Comparative example One 2 3 4 5 6 One 2 3 4 Exterior Good Good Good Good Good Good Good Good Good Good Adhesion 1 One One 0 0 0 0 0 0 4 3 Shading Good Good Good Good Good Good Good Good Good Good OD 2.0 2.0 2.4 2.4 2.2 2.2 2.6 2.6 2.1 2.0 Light transmittance at wavelength 950nm 67 67 34 34 38 38 0 0 32 30 Whether the infrared wavelength camera is recognized Good Good Good Good Good Good Bad Bad Good Good Adhesion 2 96 96 100 100 100 99 99 98 75 80

As shown in Table 4, the polarizing plate of the present invention has excellent light-shielding property and excellent light transmittance at a wavelength of 950 nm, so it can be effectively cut by increasing the alignment mark recognition rate when cutting after bonding to the panel. Excellent, the light-shielding layer has excellent adhesion not only to the polarizer protective film, but also to the polarizer and the adhesive layer.

On the other hand, Comparative Examples 1 to 4 which do not contain the dye of the present invention or which contain other types of organic dyes instead of the dye of the present invention could not obtain all the effects of the present invention.

It goes without saying that all the embodiments described above are exemplary, and different embodiments may be applied in combination with each other.

Claims (17)

A polarizing plate comprising a display area and a non-display area surrounding the display area,
The polarizing plate includes a polarizer and an adhesive layer and a first polarizer protective film sequentially stacked on one surface of the polarizer, and a light-shielding layer forming at least a part of the non-display area is in the lower surface of the first polarizer protective film and the adhesive layer. Is formed,
The light-shielding layer comprises at least one organic dye or zwitterion compound of tris phenylene aminiium-based dye, tetrakis phenylene aminiium-based dye, or a zwitterion compound thereof in 30% to 80% by weight of the light-shielding layer , Polarizer.
The polarizing plate of claim 1, wherein the first polarizer protective film is a polyethylene terephthalate (PET), a cyclic olefin polymer (COP), or a triacetylcellulose (TAC) film.
The polarizing plate of claim 1, wherein the polarizing plate has a light transmittance of 30% or more at a wavelength of 950 nm in the non-display area in which the light blocking layer is provided.
The polarizing plate of claim 1, wherein the polarizing plate has an OD value of 2.0 or more in a visible light region in the non-display region in which the light blocking layer is provided.
The polarizing plate of claim 1, wherein the organic dye is represented by any one of the following Chemical Formula 1, the following Chemical Formula 2, and the following Chemical Formula 3:
<Formula 1>

(In Formula 1, R is each independently an alkylene group having 1 to 5 carbon atoms,
R ¹ is each independently H ⁺ , an alkali metal monovalent cation, an alkyl ammonium monovalent cation, or an ammonium monovalent cation,
X ^- is _{^{NO 3 -, Cl -, Br}} -, BF 4 -, PF 6 -, or SbF ₆ ^- a)
<Formula 2>

(In Chemical Formula 2,
Each R is independently an alkylene group having 1 to 5 carbon atoms,
R ¹ is each independently H ⁺ , an alkali metal monovalent cation, an alkyl ammonium monovalent cation, or an ammonium monovalent cation,
X ^- is _{^{NO 3 -, Cl -, Br}} -, BF 4 -, PF 6 -, or SbF ₆ ^- a)
<Formula 3>

(In Chemical Formula 3,
Each R is independently an alkylene group having 1 to 5 carbon atoms,
R ¹ is each independently H ⁺ , an alkali metal monovalent cation, an alkyl ammonium monovalent cation, or an ammonium monovalent cation,
X ^- is _{^{NO 3 -, Cl -, Br}} -, BF 4 -, PF 6 -, or SbF ₆ ^- is).
The method of claim 5, wherein each R is independently an ethylene group,
The R ¹ is each independently H ⁺ , Na ⁺ , K ⁺ , NH ₄ ⁺ , (R ₅ ) ₄ N ⁺ , (R ₅ ) ₃ NH ⁺ , (R ₅ ) ₂ NH ₂ ⁺ , and at this time, R ₅ Is a C 1 to C 10 alkyl group, the polarizing plate.
delete The polarizing plate of claim 1, wherein the light-shielding layer further comprises at least one pigment of carbon black and a mixed pigment of an alloy containing silver-tin.
The polarizing plate according to claim 8, wherein the light-shielding layer contains 30% to 80% by weight of the organic dye or a mixture of the zwitterionic compound and the pigment.
The polarizing plate of claim 8, wherein the organic dye or zwitterionic compound thereof is contained in an amount of 10% to 50% by weight of the light-shielding layer, and the pigment is contained in an amount of 10% to 50% by weight of the light-shielding layer.
The polarizing plate according to claim 1, wherein the light-shielding layer is formed of a photocurable or thermosetting light-shielding layer composition comprising the organic dye or a zwitterionic compound thereof.
The polarizing plate of claim 11, wherein the composition for a light shielding layer further comprises a binder resin and an initiator.
The polarizing plate of claim 12, wherein the composition for a light-shielding layer further comprises at least one of a reactive unsaturated compound, a solvent, and an additive.
The polarizing plate of claim 1, wherein the light blocking layer is formed of a printed pattern spaced apart from each other.
The polarizing plate of claim 1, wherein the thickness of the light blocking layer is 50% to 100% of the thickness of the adhesive layer.
The polarizing plate of claim 1, wherein a second polarizer protective film is further formed on a lower surface of the polarizer.
An optical display device comprising the polarizing plate of any one of claims 1 to 6 and 8 to 16.

Images