WO2019054664A1 - Polarizing plate and optical display device including same - Google Patents

Abstract

Disclosed are a polarizing plate and an optical display device including the same. The polarizing plate is a polarizing plate including a display region and a non-display region encompassing the display region, wherein the polarizing plate includes a polarizer, an adhesive layer and a first polarizer protection film, which are sequentially stacked on the polarizer, the adhesive layer includes a light shielding layer for forming at least a part of the non-display region within the adhesive layer, the light shielding layer has a plurality of print patterns which are spaced from each other, the print patterns include a first print pattern and a second print pattern formed on the first print pattern, and the second print pattern has a pattern form which differs from that of the first print pattern.

Description

Polarizer and optical display device including the same

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

The optical display device comprises a display area and a non-display area. The display area is optically transmissive and allows the image to be viewed through the screen. The non-display area is located at the edge of the display area, surrounds the display area, and mounts a printed circuit board and a driving chip for driving an image. The non-display area is obscured by the light-shielding layer or the like so as not to be visible to the user using the optical display device. Generally, a method of printing a light-shielding layer on a window or manufacturing a separate printing tape and attaching it to a cover window is used. This can increase the thickness of the optical display device.

On the other hand, since there is no light shielding layer in the display area and the light shielding layer is in the non-display area, there is a difference in luminous intensity at the interface between the display area and the non-display area. Particularly, when a pattern is formed on the light-shielding layer in the non-display area, the uniformity is lowered, and the difference in the light-sensing difference can be more easily recognized locally. If the light leakage occurs when the display device is driven, the difference in the visibility can be further increased. Such a difference in sensation is caused by whether or not RGB (red, green, blue) is viewed in a pixel when the optical display device is driven. The bigger the difference, the better RGB can be seen. Therefore, in the case of forming a pattern in the light-shielding layer, there is a need for a polarizing plate capable of lowering the sensitivity difference between the display area and the non-display area while improving the light shielding property and lowering the degree of RGB visibility in the pixel when driven by the optical display device.

The background art of the present invention is disclosed in Korean Patent Publication No. 2015-0015243.

SUMMARY OF THE INVENTION An object of the present invention is to provide a polarizing plate capable of minimizing the difference in viewing angle by increasing the uniformity between the display area and the non-display area at the interface between the display area and the non-display area when the display device is driven.

Another object of the present invention is to provide a polarizing plate capable of minimizing recognition of occurrence of light leakage by increasing the uniformity between the display area and the non-display area at the interface between the display area and the non-display area when the display device is driven.

It is still another object of the present invention to provide a polarizing plate which is excellent in light shielding property and which can lower the degree of visibility of R, G,

The polarizing plate of the present invention is a polarizing plate composed of a display region and a non-display region surrounding the display region, wherein the polarizing plate comprises a polarizer and an adhesive layer and a first polarizer protective film sequentially laminated on one surface of the polarizer, And a light shielding layer that forms at least a part of the non-display area in the adhesive layer, wherein the light shielding layer is formed with a plurality of print patterns spaced from each other, and the print pattern is formed on the first print pattern and the first print pattern A second print pattern having a pattern shape different from that of the first print pattern, a point where an interface between the display area and the non-display area contacts the first print pattern is a, A point at which the first print pattern immediately adjacent to the pattern contacts the interface between the display area and the non-display area is b, The distance from the boundary between the display area and the non-display area to the distance c, and the distance from the display area to the non-display area, The minimum value H of the distance from the interface to the surface d may be about 200 mu m or less.

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

The present invention provides a polarizing plate capable of minimizing the difference in viewing angle by increasing the uniformity between the display area and the non-display area at the interface between the display area and the non-display area when the display device is driven.

The present invention provides a polarizing plate capable of minimizing recognition of occurrence of light leakage by increasing uniformity between a display area and a non-display area at a boundary surface between a display area and a non-display area when a display device is driven.

The present invention provides a polarizing plate which is excellent in light shielding property and lowers the degree of visible to RGB in a pixel or prevents visible RGB when driven in an optical display device.

1 is a perspective view of a polarizing plate of an embodiment of the present invention.

2 is a cross-sectional view of a polarizing plate of one embodiment of the present invention.

3 is an enlarged view of a print pattern of a part of the light shielding layer.

4 is a cross-sectional view of a print pattern of a part of the light shielding layer.

5 is a partial cross-sectional view of a sample for evaluating RGB visibility in a pixel in the embodiment and the comparative example.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

The terms "upper" and "lower" in this specification are defined with reference to the drawings, wherein "upper" may be changed to "lower", "lower" What is referred to as " on " may include not only superposition, but also intervening other structures in the middle. On the other hand, what is referred to as " directly on ", " directly above ", or " directly formed " or " directly contacting "

The polarizing plate of the present invention comprises a display area and a non-display area surrounding the display area, wherein the polarizing plate comprises a polarizer and an adhesive layer and a first polarizer protective film sequentially laminated on one surface of the polarizer, And a light-shielding layer that forms at least a part of the non-display area. In the polarizing plate of the present invention, the light shielding layer is impregnated in the adhesive layer, so that the optical display device can be made thin.

In the polarizing plate of the present invention, the light shielding layer is formed with a plurality of print patterns spaced from each other. The print pattern is composed of a first print pattern and a second print pattern formed on the first print pattern. Preferably, the second print pattern is formed directly on the first print pattern, so that the light-shielding layer can be thinned together with the effects of the present invention described below. The " directly formed " means that no other layer is interposed between the first print pattern and the second print pattern.

The first print pattern has a different pattern shape from the second print pattern. The point at which the first print pattern is in contact with the interface between the display area and the non-display area is a, and the point at which the first print pattern immediately adjacent to the first print pattern is in contact with the interface between the display area and the non- A distance from the boundary surface between the display area and the non-display area to c, and a distance from the boundary between the display area and the non-display area, The minimum value of the distance from the interface to d is H. H may be about 200 탆 or less, for example, about 0.1 탆 to about 200 탆, and preferably about 5 탆 to about 200 탆. In the above range, the light shielding effect is obtained and the uniformity between the display area and the non-display area is high, so that there is little difference in viewing and RGB in the pixel may not be visually recognized.

A " is defined as a point where the interface between the display area and the non-display area contacts the first print pattern is a, and the point of the second print pattern closest to the interface between the display area and the non- The shortest distance DELTA L may be about 200 mu m or less, preferably about 0.1 mu m to about 200 mu m, and more preferably about 10 mu m to about 200 mu m. In the above range, the light shielding effect is obtained and the uniformity between the display area and the non-display area is high, so that there is little difference in viewing and RGB in the pixel may not be visually recognized.

In one embodiment, the difference between the maximum major axis length of the first print pattern and the maximum major axis length of the second print pattern is about 200 mu m or less, preferably about 0.1 mu m to about 200 mu m, more preferably about 10 mu m To about 200 mu m. In the above range, the light shielding effect is obtained and the uniformity between the display area and the non-display area is high, so that there is little difference in viewing and RGB in the pixel may not be visually recognized. The " maximum long axis length " means the maximum length among lines connecting arbitrary two points constituting a pattern in each of the first print pattern and the second print pattern.

The difference between the shortest distance DELTA L and the long axis length may be the same or different.

Hereinafter, the polarizing plate of one embodiment of the present invention will be described in detail with reference to FIG. 1 and FIG. FIG. 1 is a perspective view of a polarizing plate of one embodiment of the present invention, and FIG. 2 is a sectional view of a polarizing plate of an embodiment of the present invention.

1 and 2, the polarizing plate 10 includes a polarizer 100, a first polarizer protective film 200 laminated on one side of the polarizer 100 through an adhesive layer 310, And a second polarizer protective film 400 laminated on one side. A light shielding layer 320 is formed in the adhesive layer 310.

Although not shown in FIGS. 1 and 2, an adhesive layer may be further formed on the lower surface of the second polarizer protective film 400. Although not shown in FIGS. 1 and 2, a functional layer may be further formed on the upper surface of the first polarizer protective film 200. The functional coating layer provides an additional function to the polarizing plate, and can be used for anti-finger, low reflection, anti-glare, anti-contamination, anti-reflection, Diffusion, and refraction functions. The haze of the functional coating layer can be controlled by a method known to those skilled in the art.

The polarizing plate 10 may be a polarizing plate disposed on the viewer side of the optical display device. Therefore, the adhesive layer 310 and the first polarizer protective film 200 are sequentially formed on the light exit surface of the polarizer 100. [

2, the polarizing plate 10 includes a display region S1; And a non-display area S2 surrounding the edge of the display area S1 and corresponding to the light-shielding layer 320 of FIG. The display region S1 is a light-transmitting region, and the non-display region S2 is a light-impermeable region.

The light shielding layer 320 is formed on at least one surface of the adhesive layer 310 in the adhesive layer 310. Preferably, the light shielding layer 320 is formed so as to directly contact the adhesive layer 310.

1 and 2, the light shielding layer 320 is formed so as to surround the edge of the adhesive layer 310. The light shielding layer 320 is not formed as a separate layer from the adhesive layer 310, so that the optical display device can be made thin. The light shielding layer 320 forms at least a part of the non-display area when the polarizing plate of the present invention is mounted on the optical display device.

The light shielding layer 320 is formed on the light exit surface of the polarizer 100. Therefore, a display function can be realized in a portion of the polarizer where the light shielding layer 320 is not formed. However, the case where the light shielding layer 320 is formed on the light incident surface of the polarizer 100 can also be included in the scope of the present invention.

The thickness of the light shielding layer 320 may be less than or equal to the thickness of the adhesive layer 310.

1 shows a case where the thickness of the light shielding layer 320 is the same as that of the adhesive layer 310. FIG. FIG. 2 shows a case where the thickness of the light shielding layer 320 is smaller than that of the adhesive layer 310. The thickness of the light shielding layer 320 may be about 50% to about 100% of the thickness of the adhesive layer 310. Within the above range, it can be contained in the adhesive layer, and the polarizing plate can be thinned. For example, the thickness of the light shielding layer 320 may be about 0.1 占 퐉 to about 4 占 퐉, preferably about 1.0 占 퐉 to about 4.0 占 퐉. Within the above range, it can be contained in the adhesive layer, securing the light shielding property, and making the polarizing plate thinner.

The light shielding layer 320 will be described in detail with reference to FIGS. 3 and 4. FIG. Fig. 3 is an enlarged view of a print pattern in the light-shielding layer at the interface between the display area S1 and the non-display area S2 of the polarizer of Fig. 4 is a cross-sectional view of a print pattern in the light-shielding layer at the interface between the display area S1 and the non-display area S2 of the polarizer of Fig.

Referring to FIGS. 3 and 4, the light shielding layer 320 may include a plurality of printing patterns 323. The remaining area 324 of the light-shielding layer 320 excluding the printing area corresponds to an unprinted area. The print patterns 323 are formed to be spaced apart from each other. The print pattern 323 is composed of a first print pattern 321 and a second print pattern 322 formed on the first print pattern 321. The second print pattern 322 may be formed directly on the first print pattern 321. [ The second print pattern 322 has a different pattern shape from the first print pattern 321. Preferably, the area of the second print pattern 322 is smaller than the area of the first print pattern 321.

The shortest distance DELTA L may be about 200 mu m or less, preferably about 0.1 mu m to about 200 mu m, and more preferably about 10 mu m to about 200 mu m. In the above range, the light shielding effect can be obtained and the uniformity between the display area and the non-display area is high, so that there is little difference in luminosity and RGB in the pixel may not be visually recognized. In particular, the present invention differs from the above-mentioned two printing patterns in that two printing patterns are laminated, but the light shielding effect is simply increased, and the light shielding effect is obtained by adjusting the shortest distance DELTA L, This is because the uniformity is high so that the difference in the sensibility is small and the RGB in the pixel is not visually recognized.

The difference between the length of the maximum longitudinal axis 321L of the first printed pattern 321 and the length of the maximum longitudinal axis 322L of the second printed pattern 322 is about 200 μm or less, preferably about 0.1 μm to about Mu] m, more preferably from about 10 [mu] m to about 200 [mu] m. In the above range, the light shielding effect can be obtained and the uniformity between the display area and the non-display area is high, so that there is little difference in luminosity and RGB in the pixel may not be visually recognized. Particularly, in the present invention, two print patterns are stacked in a multilayer structure as shown in FIG. 3 and FIG. 4, except that the above-mentioned long axis length is made the same, And the uniformity between the display area and the non-display area is high, so that the difference in luminance is small and RGB in the pixel is not visually recognized. The length of the maximum long axis 321L of the first printed pattern 321 is about 50 μm to about 600 μm, preferably about 100 μm to about 500 μm, and the length of the maximum long axis 322L of the second printed pattern 322 is About 50 탆 to about 500 탆, and preferably about 50 탆 to about 350 탆.

Since the first print pattern 321 and the second print pattern 322 have different shapes from each other in the print pattern 323, the first print pattern 321 is printed and then the second print pattern 322 is printed It can not but be formed. Although the first print pattern and the second print pattern can be simultaneously formed by a single mold, the mold processing is not easy and the shape of the pattern is not well displayed. The print pattern must be printed in parallel, but when the second print pattern 322 is formed on the first print pattern 321, a curved surface is inevitable. Even when there is a curved surface between the first print pattern 321 and the second print pattern 322, the uniformity between the display area and the non-display area is high, The length difference DELTA L between the long axis 321L of the first printed pattern 321 and the long axis 322L of the second printed pattern 322 is set to about 200 mu m or less and preferably about 0.1 mu m to about 200 mu m , More preferably from about 10 [mu] m to about 200 [mu] m.

Referring to FIG. 3, the first print pattern 321 may have a hexagonal shape, and the second print pattern 322 may be a rhombus shape. However, the present invention is not limited thereto. For example, the first print pattern may be an N-square (N is an integer of 3 to 10), a circle, an ellipse, an amorphous shape such as an octagonal shape, and the second print pattern may be an N-square 3 to 10), circular, elliptical, amorphous, and the like. The lengths of one side constituting the first printed pattern 321 may be the same or different, and may be about 10 탆 to about 400 탆, preferably about 50 탆 to about 300 탆. The lengths of the sides constituting the second printed pattern 322 may be the same or different, and may be about 10 탆 to about 400 탆, preferably about 50 탆 to about 300 탆.

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

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

The area of the second print pattern 322 may be smaller than the area of the first print pattern 321. Thus, the second print pattern 322 can be formed on the first print pattern 321. Preferably, the area ratio of the area of the first printed pattern 321 to the area of the second printed pattern 322 may be greater than about 1, preferably greater than about 100% to less than about 3000%. In the above range, the uniformity between the display area and the non-display area is high, so that the difference in the sensibility is small and the RGB in the pixel may not be visually recognized.

Preferably, the intersection point of the first print pattern 321 and the second print pattern 322 may be at least two, and preferably three or more. For example, the " intersection point " may refer to an intersection of a border of the first print pattern 321 and a border of the second print pattern 322, as shown in Fig. In such a case, the uniformity between the display area and the non-display area is high, so that the difference in luminance is small and the RGB in the pixel may not be visually recognized.

See FIG. A point where the first print pattern 321 contacts the interface between the display area S1 and the non-display area S2 is a, and the first print pattern 321 immediately adjacent to the first print pattern 321 is the display area S1) and the non-display area S2 is b, the distance between a and b is W. [ In the first print pattern 321, A vertex point or an inflection point is c, and a vertex point or an inflection point is located closest to b in the first print pattern 321 The distance from the interface between the display area S1 and the non-display area S2 to the distance c and the distance from the interface between the display area S1 and the non-display area S2 to the distance d, Quot; H ". H may be about 200 탆 or less, for example, about 0.1 탆 to about 200 탆, and preferably about 5 탆 to about 200 탆. In the above range, the light shielding effect is obtained and the uniformity between the display area and the non-display area is high, so that there is little difference in viewing and RGB in the pixel may not be visually recognized.

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

<Formula 1>

About 0.1 x W &lt; H &lt; = about 0.5 x W

Equation (1) is that the uniformity of the first print pattern immediately adjacent to the interface between the display area and the non-display area becomes a problem at the interface, in order to ensure uniformity at the interface. W may be from about 10 占 퐉 to about 500 占 퐉, preferably from about 10 占 퐉 to about 490 占 퐉, from about 10 占 퐉 to about 480 占 퐉. For example, W > H.

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

The print patterns 323 are formed to be spaced apart from each other. The spacing distance T between the print patterns 323 may be from about 1 탆 to about 50 탆, preferably from about 5 탆 to about 30 탆. In the above range, the light shielding effect can be obtained, and the uniformity can be not affected.

The light shielding layer 320 may be partially open between the polarizer 100 and the first polarizer protective film 200. That is, the light shielding layer 320 may have a shape of a closed curve, and may include some empty areas inside. Therefore, the inside of the light-shielding layer 320 described above may be defined as an empty space inside the light-shielding layer 320 forming the closed curve. The light shielding layer 320 may be disposed on at least a part or all of the outer edge on the horizontal section of the polarizer 100 and the first polarizer protective film 200. However, the present invention is not limited thereto.

The light shielding layer 320 may include a composition for a light shielding layer described below to give an adhesive force to the first polarizer protective film 200 to bond the polarizer 100 and the first polarizer protective film 200 together. Therefore, even if the adhesive layer 310 does not exist between the polarizer 100 and the light shielding layer 320 and between the first polarizer protective film 200 and the light shielding layer 320, the polarizer 100 and the first polarizer protective film 200 ).

The light shielding layer 320 may shield or absorb light, and may include a specific pattern such as a logo or a dot pattern of a company. That is, the user can include a desired shape in the light shielding layer 320, thereby giving the user of the display device a sense of beauty.

The light-shielding layer 320 may be formed of a composition for a light-shielding layer containing a pigment, a binder resin, and an initiator. The composition for the light-shielding layer may further comprise a reactive unsaturated compound.

The light-shielding layer 320 may include the above-mentioned components to form the light-shielding layer 320 having a thinner thickness, thereby ensuring the reflectance difference of the present invention. The composition for forming the light-shielding layer may further comprise a solvent.

The pigment may be carbon black, a mixed pigment of a silver-tin-containing alloy, or a combination thereof. Examples of carbon black include, but are not limited to, graphitized carbon, furnace black, acetylene black, ketjen black, and the like. The pigment may be included as a pigment dispersion, but is not limited thereto.

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, Methacrylate / styrene / 2-hydroxyethyl methacrylate copolymer, and the like. The polyurethane resin may be an aliphatic polyurethane resin. The acrylic resin may be an acrylic pressure-sensitive adhesive resin. However, the present invention is not limited thereto.

The reactive unsaturated compound may include at least one of a photocurable unsaturated compound and a thermosetting unsaturated compound as a compound having a low weight average molecular weight relative to the binder resin. The reactive unsaturated compound is selected from the group consisting of ethylene glycol diacrylate, ethylene glycol dimethacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, triethylene glycol dimethacrylate, 1,6-hexane diol diacrylate, 1 (Meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, pentaerythritol tri (meth) acrylate, (Meth) acrylate, trimethylolpropane tri (meth) acrylate, and tris (meth) acryloyloxyethyl phosphate can be given. It does not.

The initiator may include at least one of a photopolymerization initiator and a thermosetting initiator.

Examples of the photopolymerization initiator include, but are not limited to, acetophenone compounds, benzophenone compounds, thioxanone compounds, benzoin compounds, triazine compounds, morpholine compounds and the like.

Examples of the thermal curing initiator include 1,3-bis (hydrazinocarbonoethyl-5-isopropylhydantoin) as a hydrazide compound, dicyandiamide, guanidine derivative, 1-cyanoethyl- - phenylimidazole, N- [2- (2-methyl-1-imidazolyl) ethyl] urea, 2,4-diamino- Ethyl-s-triazine, N, N'-bis (2-methyl-1-imidazolylethyl) Phenyl-4-methyl-5-hydroxymethylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, modified aliphatic polyamines as acid anhydrides, tetrahydrophthalic anhydride and ethylene glycol-bis Hydrotrimellitate), and the like.

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 methylethylcarbitol, diethylcarbitol, 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 the present invention is not limited thereto.

In one embodiment, the composition for the light-shielding layer 320 comprises about 1% to about 50% by weight pigment (or pigment dispersion), from about 0.5% to about 20% by weight of the binder resin, from about 0.1% About 10% by weight and the remainder of the solvent. Shielding layer 320 can be formed in the above-described range, and an excellent shielding effect can be exhibited.

In another embodiment, the composition for the light-shielding layer 320 comprises about 1 wt% to about 50 wt% of pigment (or pigment dispersion), about 0.5 wt% to about 20 wt% of a binder resin, about 1 wt% of a reactive unsaturated compound To about 20% by weight of the initiator, from about 0.1% to about 10% by weight of the initiator, and the remainder of the solvent. Shielding layer 320 can be formed in the above-described range, and an excellent shielding effect can be exhibited.

In addition to the above-mentioned components, the composition for the light-shielding layer 320 may include about 0.1 wt.% To about 1 wt.% Of other additives. Examples of the other additives include a silane coupling agent, 0.0 &gt; 320 &lt; / RTI &gt;

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

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 section. The adhesive layer 310 may be formed only on a part of the adhesive layer 310 and more specifically the polarizer 100 and the first polarizer protective film 200, And may be arranged in an island shape only in the center portion except for the rim.

The adhesive layer 310 may be formed directly in contact with the light shielding layer 320 so that the light shielding layer 320 can be stably formed in the polarizing plate 10. [

The adhesive layer 310 may adhere the polarizer 100 and the first polarizer protective film 200 to each other and may include an aqueous adhesive or an ultraviolet curable adhesive. The water-based adhesive may include at least one member selected from the group consisting of a polyvinyl alcohol-based resin and a vinyl acetate-based resin, or may include a polyvinyl alcohol-based resin having a hydroxyl group, but is not limited thereto. The ultraviolet curing type adhesive may be an acrylic type, a urethane-acrylic type, or an epoxy type. However, the present invention is not limited thereto.

When the adhesive layer 310 is formed of an aqueous adhesive, the thickness of the adhesive layer 310 may be about 0.1 μm to about 4 μm. When the adhesive layer 310 is composed of an ultraviolet curable adhesive, the thickness of the adhesive layer 310 is about 2 μm to about Lt; / RTI &gt; In the above range, a gap between the polarizer 100 and the first polarizer protective film 200 by the light-shielding layer 320 of the present invention can be scattered, thereby improving the durability of the polarizer. That is, the deviation between the region where the light blocking layer 320 is present and the region where the light blocking layer 320 is not present between the polarizer 100 and the first polarizer protective film 200 can be minimized.

The first polarizer protective film 200 may be formed on one side 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 may be made of at least one selected from the group consisting of a polyester including polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate and the like, acrylic, cyclic olefin polymer (COP) Polyvinyl acetate, polyvinyl chloride (PVC), polynorbornene, polycarbonate (PC), polyamide, polyacetal, polyphenylene ether, polyphenylene sulfide, poly (ethylene terephthalate) Sulfone, polyether sulfone, polyarylate, and polyimide.

In one embodiment, the first polarizer protective film may comprise a polyester-based material, and in an exemplary embodiment, from the point of view of the polyester being crystalline, an aromatic polyester may be used and, for example, polyethylene (PET), polyethylene naphthalate (PEN), and copolymers thereof. However, the present invention is not limited to these. The first polarizer protective film may be a triple coextruded structure including a polyethylene terephthalate type, a polyethylene naphthalate type, or a copolymer resin containing them. The polyester film can be obtained, for example, by a method in which the above-mentioned polyester resin is melt-extruded in a film form and then cooled and solidified by a casting drum to form a film. On the other hand, the first polarizer protective film 200 is widely known in the art, and a detailed description thereof will be omitted.

The first polarizer protective film 200 may have a thickness of about 30 탆 to about 120 탆, specifically about 20 탆 to about 80 탆. And can be used in an optical display device in the above range.

The first polarizer protective film 200 may be an isotropic film or a retardation film. The isotropic film has an in-plane retardation Re (Re = (nx-ny) xd at a wavelength of 550 nm, nx and ny are refractive indexes in the slow axis direction and the fast axis direction of the protective film at a wavelength of 500 nm, Or less. The retardation film may include a film having an in-plane retardation Re at a wavelength of 550 nm of greater than about 5 nm, such as from about 10 nm to about 15,000 nm.

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

The polarizer 100 is formed on the lower surface of the adhesive layer 310 to polarize the incident light.

Polarizer 100 may comprise a polarizer. The polarizer may comprise conventional polarizers known to those skilled in the art. Specifically, the polarizer may include a polyvinyl alcohol polarizer produced by uniaxially stretching a polyvinyl alcohol film, or a polyene polarizer produced by dehydrating a polyvinyl alcohol film. The polarizer 100 may have a thickness of about 5 占 퐉 to about 40 占 퐉. In the above range, it can be used in an optical display device.

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

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

Manufacturing example  1 and Manufacturing example  2

(TMP-DC-1, manufactured by Sumitomo Osaka Cement Co., Ltd.) (pigment solid 30% by weight) was used as a pigment dispersion containing 30% by weight of the pigment (A) A pigment dispersion (Sakata Co., CI-M-050) containing carbon black (% by weight of silver and tin = 7: 3) and (A-2) was mixed and used as shown in Table 1 below. (B-2) acrylic pressure-sensitive adhesive resin (WA-9263, manufactured by Uin Chemtech Co., Ltd.) was used as the binder resin (B-1), SUO-1000 of Shin- Respectively. (M60 manufactured by Uintechhemtech Co., Ltd.) as a heat curing initiator, IGR 369 or (D-2) as a photopolymerization initiator (D-1) as a reactive unsaturated compound, dipentaerythritol hexaacrylate, , (E) propylene glycol methyl ether acetate as the solvent, and (F) 765 W of Tego as the silane coupling agent were used.

A composition for a light-shielding layer was prepared by controlling the contents of the pigment dispersion, the binder resin, the reactive unsaturated compound, the initiator, the solvent and the silane coupling agent as shown in Table 1 below.

Example  One

A first print pattern was formed by coating the light-shielding layer composition of Production Example 1 with gravure coating on the edge of one side of a polyethylene terephthalate (PET) film. The printing roll is a first printing pattern having a regular hexagon, which are spaced apart from each other and have a honeycomb structure in a honeycomb shape. The first print pattern is a regular hexagon having a side length of 50 mu m. After printing the first print pattern, a second print pattern was formed with another print roll. The printing roll is rhombic with a second printing pattern, and one side has a length of 50 mu m. At this time, the second print pattern is formed on the first print pattern, and the long axes of the first print pattern and the second print pattern are parallel to each other. Finally, a light-shielding layer having the structure shown in Figs. 3 and 4 was formed. The solvent was removed at 85 ° C for 1 minute, and then exposed to light at 650 mJ light intensity using a metal halide exposing machine to be cured to form a light shielding layer (thickness: 3 μm).

(Polyvinyl alcohol film thickness: 60 占 퐉, degree of polymerization: 2400, degree of saponification: 99.0%, VF-PS6000, Kuraray Co., Ltd.) was swollen in an aqueous solution at 25 占 폚 and subjected to stretching while being dyed in an iodine ion- . The polyvinyl alcohol film thus treated was further stretched in an aqueous solution of boric acid at 55 캜 to obtain a final stretching ratio of 6 times. The obtained polyvinyl alcohol film was dried in a 50 占 폚 chamber for 3 minutes to prepare a polarizer (thickness: 12 占 퐉).

The polarizer, the adhesive layer, the cycloolefin polymer film (ZB12-052125, manufactured by Zeon), the adhesive layer (OS-207, Soken) as the second polarizer protective film were laminated on the surface of the PET film on which the light- ) Were sequentially laminated to prepare a polarizing plate.

Example  2 to Example  3

A polarizing plate was produced in the same manner as in Example 1 except that the first print pattern and the second print pattern were changed as shown in Table 2 below.

Example  4

A polarizing plate was produced in the same manner as in Example 1, except that the composition of Production Example 2 was used in place of the composition of Production Example 1, and the curing method was thermoset for 2 minutes at 85 占 폚.

Example  5

A polarizing plate was produced in the same manner as in Example 4 except that the first print pattern and the second print pattern were changed as shown in Table 2 below.

Comparative Example  1 to Comparative Example  2

A polarizing plate was produced in the same manner as in Example 1 except that the first print pattern and the second print pattern were changed as shown in Table 2 below.

The polarizers thus prepared were evaluated in the following Table 2.

(1) Light shielding property: The light shielding layer in the polarizing plate obtained in the above Examples and Comparative Examples was measured using an optical densitometer (TD-904: Greater Tag Macbeth) based on JIS K7651: 1988 using a UV filter. In the following Table 2, the 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). ? Has an absorbance value of 2.0 or more,? Is more than 1.5 and less than 2.0,? Is more than 1.0 and not more than 1.5, and X has a value of 1.0 or less.

(2) Whether RGB is Visible in Pixels: FIG. 5 is a partial cross-sectional view of a specimen for evaluating whether or not RGB is visually observed. 5, the light source-side polarizing plate 50 is attached to one surface of the liquid crystal cell 20 composed of the display area S1 and the non-display area S2. The light source-side polarizing plate 50 was produced by adhering triacetyl cellulose films to both sides of the polarizer produced in the Example.

On the other side of the liquid crystal cell 20, the polarizing plate 60 on which the light-shielding layer 320 produced in Examples and Comparative Examples were formed was attached to the viewing side polarizing plate. The dummy chip 40 and the metal wiring 30 are formed in the non-display area S2 of the liquid crystal cell 20 on the viewing side. The light blocking layer 320 was partially overlapped with the dummy chip 40 to produce a test piece.

The specimen was driven to visually evaluate whether or not RGB was visually observed. If RGB is not visually recognized and there is no difference between the display area and the non-display area, it is evaluated as 'good'. When RGB is visually recognized and the difference between the display area and the non-display area is sensed, it is evaluated as 'bad.'

As shown in Table 2, the polarizing plate of the present invention is excellent in light shielding property, and the uniformity between the display area and the non-display area is increased at the interface between the display area and the non-display area when the display device is driven, I did.

On the other hand, in Comparative Example 1 in which H is more than 200 mu m, RGB difference was visually observed between the display area and the non-display area at the interface between the display area and the non-display area when the display device was driven, In the comparative example 2, the light shielding property is poor, and when the display device is driven, RGB is visually observed at the pixel because the difference between the display area and the non-display area is significant at the interface between the display area and the non-

It will be appreciated that the embodiments described above are all exemplary and that different embodiments may be applied in combination.

Claims (14)

1. And a non-display area surrounding the display area,

   Wherein the polarizing plate comprises a polarizer, and an adhesive layer and a first polarizer protective film are sequentially laminated on one surface of the polarizer, and the adhesive layer includes a light shielding layer in the adhesive layer that forms at least a part of the non-

   Wherein the light-shielding layer has a plurality of print patterns spaced apart from each other,

   Wherein the print pattern comprises a first print pattern and a second print pattern formed on the first print pattern, wherein the second print pattern has a pattern shape different from that of the first print pattern,

   A point at which the interface between the display area and the non-display area contacts the first print pattern is a, a point at which the first print pattern immediately adjacent to the first print pattern contacts the interface between the display area and the non- a distance from the interface between the display area and the non-display area to c, and a distance from the boundary between the display area and the non-display area, And the minimum value H of the distance from the interface between the display region and the non-display region to d is about 200 占 퐉 or less.
2. The polarizing plate according to claim 1, wherein the shortest distance DELTA L between a and a 'is about 200 mu m or less, when a point of the second print pattern closest to the interface between the display area and the non-display area is a'.
3. The polarizing plate according to claim 2, wherein the ΔL is about 0.1 μm to about 200 μm.
4. The polarizing plate according to claim 1, wherein the difference between the maximum major axis length of the first print pattern and the maximum major axis length of the second print pattern is about 200 μm or less.
5. The polarizing plate according to claim 1, wherein the light-shielding layer is formed so as to be in contact with one surface of the adhesive layer and surround the edge of the adhesive layer.
6. The polarizing plate according to claim 1, wherein the area of the first print pattern is smaller than the area of the second print pattern.
7. 2. The polarizing plate according to claim 1, wherein a distance between a and b is W, and the following formula 1 is satisfied.

   <Formula 1>

   About 0.1 x W &lt; H &lt; = about 0.5 x W.
8. The polarizing plate according to claim 1, wherein the first print pattern is regular hexagon, the first print pattern is arranged in a honeycomb structure, and the second print pattern is rhombic or square.
9. The polarizing plate according to claim 1, wherein the light-shielding layer is formed of a composition for forming a light-shielding layer including a pigment, a binder resin and an initiator.
10. The polarizing plate according to claim 9, wherein the light-shielding layer forming composition further comprises a reactive unsaturated compound.
11. The polarizing plate according to claim 9, wherein the pigment comprises carbon black, a mixed pigment of a silver-tin-containing alloy, or a combination thereof.
12. The polarizer of claim 1, wherein the light shielding layer is formed directly on one surface of the first polarizer protective film.
13. The polarizer according to claim 1, wherein a second polarizer protective film and an adhesive layer are sequentially formed on the other surface of the polarizer.
14. An optical display device comprising the polarizing plate of any one of claims 1 to 13.

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