KR101490775B1 - Polarizer for liquid ctystal display device and liquid crystal display device including the same - Google Patents

Abstract

The present invention relates to a polarizing plate for a liquid crystal display, and more particularly to an anti-glare layer of a polarizing plate.

The feature of the present invention is to improve the value of the 10-point average roughness of the polarizing plate anti-glare layer and the average distance value of the surface irregularity which form the surface in a concavo-convex shape.

Accordingly, the contrast ratio and visibility of the liquid crystal display device can be improved.

 Polarizer, anti-glare layer, contrast ratio, 10 point average illuminance, surface irregularity average distance

Description

[0001] The present invention relates to a polarizing plate for a liquid crystal display and a liquid crystal display having the same.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizing plate for a liquid crystal display device and a liquid crystal display device having the same, and more particularly to a polarizing plate anti-glare layer.

A cathode ray tube (CRT), which is one of the widely used display devices, has been mainly used for monitors such as a TV, a measurement device, and an information terminal device. However, due to the large weight and size of the CRT itself, , It could not actively cope with the demand for weight reduction.

In order to replace such a CRT, a liquid crystal display device having advantages of small size and light weight has been actively developed, and in recent years, a demand for a flat panel display device has been developed to such a degree that it can sufficiently perform its function.

The principle of image realization of such a liquid crystal display device utilizes the optical anisotropy and the polarization property of liquid crystal. The liquid crystal has anisotropy having a long molecular structure and having a directional arrangement, and polarization It has properties.

Accordingly, the liquid crystal display device has a liquid crystal panel composed of a pair of transparent insulating substrates, each of which has electric field generating electrodes formed on the surfaces thereof facing each other with a liquid crystal layer sandwiched therebetween as an essential component, The arrangement direction of the molecules is artificially adjusted, and various images are displayed by using the transmittance of light which is changed at this time.

At this time, a polarizing plate for visualizing the liquid crystal alignment change of the liquid crystal display device is positioned on the upper and lower sides of the liquid crystal panel. The polarizing plate transmits the light of the polarized component coinciding with the transmission axis and arranges the transmission axes of the two polarizing plates The degree of light transmission is determined by the arrangement characteristics of the liquid crystal.

1A and 1B are schematic views for explaining characteristics of light transmitted through a general liquid crystal panel.

As shown in the figure, the liquid crystal display device comprises a liquid crystal panel 10 and a backlight 20 for supplying light from the rear side of the liquid crystal panel 10, and the liquid crystal panel 10 includes a liquid crystal layer 6, And first and second polarizers 12 and 14 attached to the outer surfaces of the first and second substrates 2 and 4 and the second and third substrates 2 and 4, respectively.

At this time, a plurality of pixels having transparent pixel electrodes formed on the inner surface of the first substrate 2 and a thin film transistor for on / off controlling the liquid crystal driving voltage transmitted to the pixel electrodes are provided. A color filter and a common electrode for color implementation are provided on the inner surface.

The liquid crystal layer 6 interposed between the two substrates 2 and 4 is a TN mode in which the long axis direction of the molecules is kept in parallel with the substrates 2 and 4 in the off- 1 to the second substrate 4, and the polarization axes of the first and second polarizers 12 and 14 are orthogonal to each other.

The backlight 20 supplies scattered light close to natural light to the liquid crystal panel 10.

The scattered light emitted from the backlight 20 when the voltage as shown in FIG. 1A is off is transmitted through only the linearly polarized light parallel to the polarization axis of the scattered light and absorbed by the first polarizer 12, and the liquid crystal layer 6 The second polarizing plate 14 is rotated 90 degrees along its azimuth angle to display white.

Next, when the voltage is in the ON state as shown in FIG. 1B, the long axis of the liquid crystal molecules is arranged perpendicularly to both substrates 2 and 4 to lose an optical rotatory power of 90 degrees, The linearly polarized light transmitted through the first polarizing plate 12 is blocked by the second polarizing plate 14 to display black.

The second polarizing plate 14 described above has an anti-glare layer (not shown) to prevent the polarizing plate 14 from generating glare due to external light. The light incident on the polarizing plate 14, Diffused and dispersed by the anti-reflection layer (not shown).

However, the polarizing plate 14 provided with the anti-glare layer (not shown) in comparison with the polarizing plate 14 not provided with the anti-glare layer (not shown) is reduced in brightness in proportion to the diffusion and dispersion by the anti- And there is a difference in luminance and color tone due to diffuse reflection.

This causes a decrease in the contrast ratio and visibility of the liquid crystal display device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a polarizing plate having improved contrast ratio and visibility.

In order to achieve the above-mentioned object, there is provided a polarizing plate comprising: a polarizing layer; First and second TAC films adhered to the lower surface and the lower surface of the polarizing layer; An antiglare layer formed on one surface of the first TAC film and including silica beads; And an adhesive layer formed on one surface of the second TAC film, wherein the anti-glare layer has a 10-point surface roughness (Rz) value of 3.3 to 4.0 탆 and an average distance Sm value of surface irregularity of 7 to 12 탆 Wherein the thickness of the anti-glare layer is 1 to 1.5 mu m, and the size of the silica bead is 1 to 1.2 mu m.

The 10-point surface roughness value is obtained by dividing the average value of the peak height from the top to the fifth peak height and the average value of the depths of the troughs from the highest depth to the fifth highest depth with respect to the reference length defined from the concave- And the average surface irregularity distance is an average distance value obtained by measuring a distance between a peak and a peak of the cross-section concavo-convex shape.

The thickness of the anti-glare layer is 1 to 1.5 mu m, and the size of the silica bead is 1 to 1.2 mu m.

The display device may further include a discotic liquid crystal layer between the second TAC film and the adhesive layer.
The present invention also provides a liquid crystal display comprising: a liquid crystal panel including a first substrate and a second substrate facing each other, and a liquid crystal layer interposed between the first and second substrates; A first polarizing layer, first and second TAC films adhered on the lower surface of the first polarizing layer, and a second adhesive layer formed on one surface of the second TAC film, A first polarizer including a first polarizer layer; Third and fourth TAC films provided on the outer surface of the second substrate of the liquid crystal panel and attached to the lower surface of the second polarizer layer and the lower surface of the second polarizer layer; And an adhesive layer formed on one surface of the fourth TAC film, wherein the anti-glare layer has a 10-point surface roughness (Rz) value of 3.3 to 4.0 탆, an average distance Sm of surface irregularities, Wherein the thickness of the anti-glare layer is in the range of 1 to 1.5 mu m. The liquid crystal display device according to claim 1, wherein the anti-glare layer has a thickness of 1 to 1.5 mu m.

As described above, by improving the value of the 10-point average roughness of the polarizing plate anti-glare layer and the average distance value of the surface irregularity of the surface of the polarizing plate anti-glare layer according to the present invention, it is possible to improve the contrast ratio and visibility of the liquid crystal display device It is effective.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

2 is a cross-sectional view schematically showing a part of a liquid crystal panel according to an embodiment of the present invention.

As shown in the figure, the liquid crystal panel 200 according to the present invention includes first and second substrates 112 and 114 bonded to each other with a liquid crystal layer 116 interposed therebetween.

A pixel P is defined by an intersection of a gate wiring (not shown) and a data wiring (not shown) on the inner surface of a first substrate 112 called a double bottom substrate or an array substrate, And the pixel electrode 129 is formed in the pixel region P.

A thin film transistor T serving as a switching element made up of the gate electrode 121, the gate insulating film 123, the semiconductor layer 125, and the source and drain electrodes 127a and 127b is formed at the intersection of these gate wirings and the data wirings Respectively.

A protective layer 128 is formed on the top of the thin film transistor T and a drain electrode 127b of the thin film transistor T is electrically connected to the pixel electrode 129. [

The second substrate 114 facing the first substrate 112 is referred to as an upper substrate or a color filter substrate and the inner surface of the second substrate 114 includes a thin film transistor T, And a black matrix 132 for suppressing light leakage phenomenon by interposing a non-display region that is not related to liquid crystal driving, such as an edge of the pixel electrode 129 including a wiring.

There are color filters 134 of R, G and B which are interposed so as to correspond to the respective display regions, and the color filters 134 covering the black matrix 132 and the color filters 134, And a common electrode 136 facing the electrode 129 is provided.

At this time, between the liquid crystal layer 116, the pixel electrode 129, and the common electrode 136, first and second alignment films 131a and 131b, which are rubbed in a predetermined direction, Aligning the initial alignment state of the liquid crystal molecules and the alignment direction uniformly.

The spacers 144 are dispersed in the liquid crystal layer 116 interposed between the first and second substrates 112 and 114 to maintain a constant cell gap and the first and second substrates 112 The sealant 146 adheres to each other to prevent the liquid crystal layer 116 from leaking.

In addition, the first and second polarizing plates 200a and 200b according to the present invention are attached to the outer surfaces of the first and second substrates 112 and 114, respectively, to selectively pass light that vibrates in a specific direction.

On the back surface of the liquid crystal panel 100, a backlight assembly (not shown) including a plurality of fluorescent lamps (not shown) or an inverter (not shown) for controlling them is provided as an external light source to supply light.

When the on / off signal is applied to the thin film transistor T, the thin film transistor T transfers the pixel signal to the selected pixel electrode 129, The direction of the alignment of the liquid crystal molecules interposed therebetween is artificially controlled.

Thus, the transmittance of light is determined while passing through the first polarizing plate 200a, the liquid crystal layer 116, and the second polarizing plate 200b, and the color depending on the transmittance appears while passing through the color filter 134. [

In particular, the present invention provides a liquid crystal display device with improved contrast ratio and visibility, which is achieved by adjusting the surface roughness of the first and second polarizing plates 200a and 200b. This will be described in more detail with reference to FIG.

3 is a view schematically showing the structure of a second polarizing plate according to an embodiment of the present invention.

As shown in the figure, the polarizing plate 200 includes a polarizing layer 201 having a polarization axis for changing a polarization characteristic of light, a first and second polarizing layer 201 formed on both sides of the polarizing layer 201 to protect and support the polarizing layer 201, A second TAC film 203a and 203b and an adhesive layer 209 formed on one side of the first TAC film 203a for attaching the polarizing plate 200 to a substrate (not shown) 2 anti-glare layer 205 formed on one side of the TAC film 203b and including silica beads 207. The anti-

Recently, in order to further improve the viewing angle characteristics, a WV (wide view) -TAC film (hereinafter, referred to as a " wide view ") having a discotic liquid crystal layer in which discotic liquid crystal molecules are arranged in a hybrid form is further formed on the first TAC film 203a = Compensation film) may be used.

On the other hand, the polarizing layer 201 has a characteristic that a transmission axis is formed in one direction and only light of a component parallel to the transmission axis is transmitted. This property can be achieved by stretching polyvinyl alcohol (PVA) absorbing iodine, which is a polarizer, with a strong tension.

The first and second TAC films 203a and 203b are formed on the upper and lower surfaces of the polarizing layer 201 to maintain the polarizing layer 201 in a stretched state.

At this time, a separate protective layer (not shown) may be included under the adhesive layer 209, which is detached in the process of attaching the polarizer 200 to expose the adhesive layer 209, and in the process of transportation and transportation And protects the adhesive layer 209 from being contaminated.

In addition, the anti-glare layer 205 is configured to prevent external light from scattering from the outside because the external light incident in a certain direction of the polarizing plate 200 is reflected at a specific angle and glare occurs at a specific viewing angle. do.

The light is dispersed through the silica beads 207 contained in the anti-glare layer 205, thereby preventing the light from being partially concentrated.

The anti-glare layer 205 is made of acrylate and the silica beads 207 contained therein are in the form of spheres and the surface of the polarizer 200 is covered with the silica beads 207 of the anti-glare layer 205 So that the light incident on the polarizing plate 200 induces irregular reflection that is diffused and dispersed by the anti-glare layer 205.

The size of the silica beads 207 contained in the anti-glare layer 205 is 1 to 1.2 μm, which is in the range of 30 to 75% of the thickness of the anti-glare layer 205, preferably 30 to 50%.

When the size of the silica beads 207 is about 30 to 50% of the thickness of the anti-glare layer 205, sufficient irregularities can be formed on the surface of the anti-glare layer 205, and sufficient light diffusion and dispersion functions can be obtained.

Thus, the surface roughness of the polarizing plate 200 can be adjusted through the anti-glare layer 205, and the contrast and visibility of the liquid crystal display device can be improved by adjusting the surface roughness of the anti-glare layer 205.

Here, the contrast ratio is a measure for determining how clearly an image appears on the screen of the liquid crystal display device. The brightness value of the white state in the front center of the liquid crystal panel (100 in Fig. 2) .

The luminance value in the black state is a value indicating the lowest luminance since the backlight transmitted through the liquid crystal panel (100 in Fig. 2) of the liquid crystal display is minimum, and the luminance value in the white state is a value indicating the luminance value in the liquid crystal panel 2 of 100) is maximum and the highest luminance is shown.

And visibility is evaluated by this contrast ratio.

The surface roughness of the polarizing plate 200 capable of adjusting the contrast and visibility of the liquid crystal display device is measured through arithmetic average surface roughness Ra, 10-point average roughness Rz and average distance Sm of surface irregularities, In particular, the contrast and visibility are dependent on the 10-point average roughness (Rz) and the mean distance (Sm) value of surface irregularities.

Here, the 10-point average roughness Rz and the mean distance Sm of the surface irregularities are values measured by the measuring method described in JIS B 0601 (1994). As shown in Fig. 4, the 10-point average roughness Rz Is an average value of the peak height from the top to the fifth with respect to a reference length defined from the concavo-convex shape of the surface of the anti-glare layer 205 of the polarizing plate 200, and the average value of the peak height from the highest depth to the fifth trough depth (Rz).

The average distance Sm of the surface irregularities is an average distance value obtained by measuring the distance between the peak and the peak of the cross-sectional concavo-convex shape.

This 10-point average roughness (Rz) value and the mean distance (Sm) value of the surface irregularity can be measured by a general apparatus such as atomic force microscopy (AFM) and the like.

Accordingly, the polarizing plate 200 of the present invention has a ten-point average roughness (Rz) value of the surface in the range of 3.3 to 4.0 탆 or so, and the average distance Sm of surface irregularities of the concave- Mu m or less.

Here, the conventional 10-point average roughness (Rz) value was 3.0 탆, and the mean distance (Sm) value of the surface irregularity was 5.0 탆. The 10-point average roughness (Rz) value and the surface irregularity Of the average distance (Sm) of the present invention.

In order to increase the 10-point average roughness (Rz) value and the mean distance (Sm) value of the surface irregularities, the peaks and valleys of the irregularities on the surface of the antiglare layer 205 should be positioned more closely than before, The higher the height, the deeper the depth of the bone.

That is, to improve the 10-point average roughness (Rz) value and the mean distance (Sm) value of the surface irregularity, it is possible to more uniformly form the concavo-convex shape on the surface of the antiglare layer 205 which is the surface of the polarizing plate 200.

5A to 5B are three-dimensional stereoscopic images of a general polarizing plate and a surface of a concave-convex shape of the polarizing plate according to the embodiment of the present invention.

5A is a three-dimensional surface photograph when the 10-point average roughness (Rz) value of the general polarizing plate 200 is 3.0 μm and the average distance Sm of the surface irregularity is 5.0 μm. FIG. (Rz) value in the range of 3.3 to 4.0 mu m and the average distance Sm of the surface irregularity in the range of about 7 to 12 mu m.

5A and 5B, according to an embodiment of the present invention, a surface of a polarizer 200 having a 10-point average roughness (Rz) value of 3.3 to 4 μm and an average distance (Sm) value of surface irregularities of 7 to 12 μm It can be seen that the irregularities are more uniformly formed.

By uniformly forming the concavo-convex shape on the surface of the polarizing plate 200, it is possible to improve the 10-point average roughness (Rz) value and the mean distance (Sm) value of surface irregularity.

It is also possible to reduce the thickness d of the anti-glare layer 205 of the flat plate 200 to improve the 10-point average roughness Rz value and the mean distance Sm value of surface irregularities.

The thickness d of the anti-glare layer 205 preferably has a thickness of 1 to 1.5 mu m.

sample sample1 sample2 sample3 sample4 Anti-glare layer thickness (탆) 3 to 4 1.5 to 3.5 1-2 1-2
Surface roughness
Ra (탆) 0.33 0.30 0.28 0.27 Rz (占 퐉) 2.05 2.05 1.78 1.61 Sm (탆) 7.6 7.79 9.98 8.96

Table (1)

Referring to Table 1, when the thickness d of the anti-glare layer 205 is in the range of 1.5 to 3.5 占 퐉, the 10-point average roughness Rz of the surface roughness is the value of the thickness d of the antiglare- The average distance Sm of the surface irregularities is improved from 7.6 탆 to 7.79 탆.

The 10-point average roughness Rz of the surface roughness when the thickness d of the antiglare layer 205 is 1 to 2 占 퐉 is lower than the thickness d of the antiglare layer 205 of 3 to 4 占 퐉 On the other hand, it can be seen that the average distance Sm of the surface irregularity is greatly improved from 7.6 탆 to 9.98 탆.

If the thickness d of the anti-glare layer 205 is 2 m or more, the value of the average distance Sm of the surface irregularity is improved while the value of the 10-point average roughness Rz is lower than that of the conventional anti- (D) of 1 to 1.5 mu m.

As a result, the transmittance of the polarizing plate 200 can be further improved, the brightness of the light transmitted through the polarizing plate 200 can be improved, and more uniform brightness can be realized over the entire area.

Therefore, the contrast ratio and visibility of the liquid crystal display device can be improved.

Table 2 below shows the relationship between the 10-point average roughness (Rz) value and the average distance (Sm) value of the surface irregularities according to the embodiment of the present invention and the liquid crystal display using the polarizing plate (14 in Fig. And the contrast ratio of the liquid crystal display device using the polarizing plate 200 including the improved anti-glare layer 205 is measured and compared.

sample
Black White Contrast ratio
x y L x y L ' sample1




1 point
0.2568 0.2787 0.37 0.315 0.3348 211.1 571 2 point 0.2557 0.2789 0.35 0.3149 0.3348 211.3
604 3 point 0.2559 0.2791 0.35 0.3149 0.3347 210.8
602 4 point 0.2567 0.2793 0.35 0.3148 0.3348 211.6
605 5 point 0.2567 0.2795 0.35 0.3149 0.0334
8 210.9
603 average 0.25636 0.2791 0.354 0.3149 0.274516 211.14
597 sample2




1 point 0.257 0.28 0.34 0.3149 0.3348 212.4 625
2 point 0.2552 0.2803 0.32 0.3146 0.3345 210.8 659
3 point 0.2559 0.2808 0.32 0.3145 0.3345 211.3 660
4 point 0.2561 0.2806 0.33 0.3147 0.3346 210.1 637
5 point 0.2561 0.2801 0.34 0.3149 0.3347 210.7 620
average 0.25606 0.28036 0.33 0.31472 0.33462 211.06 640
sample3




1 point 0.2564 0.2795 0.31 0.3148 0.3347 215.3 695
2 point 0.2544 0.2605 0.31 0.3147 0.3347 212.8 686
3 point 0.2541 0.2799 0.32 0.3148 0.3348 213.2 666
4 point 0.2549 0.2802 0.32 0.3149 0.3345 212.5 664
5 point 0.2548 0.2805 0.31 0.3146 0.3345 211.5 682
average 0.25492 0.27612 0.314 0.31476 0.33464 213.06 679
sample4




1 point
0.2515 0.2783 0.3 0.3147 0.3346 216.6 722 2 point 0.2526
0.2798 0.3 0.3148 0.3348 215.6 719 3 point 0.2534
0.2808 0.3 0.3145 0.3345 213.4 711 4 point 0.2542
0.2805 0.3 0.3146 0.3345 214.3 714 5 point 0.2548
0.2711 0.3 0.3147 0.3347 215.8 719 average 0.2533 0.2801 0.3 0.31466 0.33462 215.14 717

Table (2)

Samples 1 to 4 of Table 2 are the same as Samples 1 to 4 of Table 1 described above. Sample 1 has a thickness d of 3 to 4 μm and a 10-point surface roughness (Rz) value of 2.05 The sample 2 has a thickness d of 1.5 to 3.5 占 퐉 and has a 10-point surface roughness (d) of 1.5 to 3.5 占 퐉. The sample 2 has a thickness d of 1.5 to 3.5 占 퐉 and has a surface irregularity average distance Sm of 7.6. (Rz) value of 2.05 and a surface irregularity average distance (Sm) value of 7.79 is used as the liquid crystal display device.

The sample 3 has a polarizing plate 200 having a thickness d of 1 to 2 탆 and an antiglare layer 205 having a 10-point surface roughness (Rz) value of 1.78 and a surface irregularity average distance (Sm) value of 9.98 The sample 4 has a thickness d of 1 to 2 μm and a 10-point surface roughness (Rz) value of 1.61 and a surface irregularity average distance (Sm) value of 8.96. (200).

In each of the liquid crystal display devices of samples 1 to 4, the black luminance value L and the white luminance value L 'were measured at five points. Here, x and y represent the color coordinates of each point.

In Table 2, it can be seen that the liquid crystal display devices of samples 2 to 4 including the polarizing plate 200 of the present invention have a general polarizing plate (see FIG. 1A) 14, the black luminance value is lower than that of the sample 1 of the liquid crystal display device.

This is because the light having passed through the anti-glare layer 205 of the polarizing plate 200 of the samples 2 to 4 is more concentrated than the polarizing plate (14 of FIG. 1A) of the sample 1.

As a result, the contrast ratio measured by dividing the white luminance value by the black luminance value is higher than that of the sample 1 having the black luminance value higher than that of the sample 1 having the lower black luminance value.

It is also confirmed that the liquid crystal display devices of samples 2 to 4 having higher contrast ratios have better visibility than the liquid crystal display devices of sample 1.

As described above, by improving the 10-point average roughness (Rz) value of the polarizing plate anti-glare preventing layer 205 having a concave-convex surface and the average distance Sm value of the surface irregularity, it is possible to improve the contrast ratio and visibility of the liquid crystal display .

The liquid crystal layer (116 in FIG. 2) of the liquid crystal display device described above has a twisted nematic method. However, in addition to the above, a vertical alignment mode (VA), an in plane switching mode Various types can be used.

That is, since the liquid crystal panel (100 of FIG. 2) according to the present invention is characterized by being attached to both sides of the liquid crystal panel 100 and passing only specific light therethrough, the scope of the present invention is applicable to all types of liquid crystal panels 100 of FIG. 2).

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

1A and 1B are schematic views for explaining characteristics of light transmitted through a general liquid crystal panel.

2 is a cross-sectional view schematically showing a part of a liquid crystal panel according to an embodiment of the present invention.

3 is a view schematically showing the structure of a polarizing plate according to an embodiment of the present invention.

4 is a schematic view showing a cross-sectional curve of the surface of the anti-glare layer of the polarizing plate.

5A to 5B are three-dimensional stereograms of a general polarizing plate and a surface of a concave-convex shape of a polarizing plate according to an embodiment of the present invention.

Claims (7)

A polarizing layer; First and second TAC films adhered to the lower surface and the lower surface of the polarizing layer; An antiglare layer formed on one surface of the first TAC film and including silica beads; The adhesive layer formed on one surface of the second TAC film Wherein the anti-glare layer has a 10-point surface roughness (Rz) value of 3.3 to 4.0 탆 and an average distance Sm value of surface irregularity of 7 to 12 탆, wherein the thickness of the anti-glare layer is 1 To 1.5 [micro] m. The method according to claim 1, The 10-point surface roughness value is obtained by dividing the average value of the peak height from the top to the fifth peak height and the average value of the depths of the troughs from the highest depth to the fifth highest depth with respect to the reference length defined from the concave- Of the polarizer. 3. The method of claim 2, Wherein the average surface irregularity distance is an average distance value obtained by measuring a distance between a peak and a peak of the cross-section concavo-convex shape. delete The method according to claim 1, Wherein the silica beads have a size of 1 to 1.2 占 퐉.  The method according to claim 1, And a discotic liquid crystal layer between the second TAC film and the adhesive layer. A liquid crystal panel including a first substrate and a second substrate facing each other, and a liquid crystal layer interposed between the first and second substrates; A first polarizing layer, first and second TAC films adhered on the lower surface of the first polarizing layer, and a second adhesive layer formed on one surface of the second TAC film, A first polarizer including a first polarizer layer; Third and fourth TAC films provided on the outer surface of the second substrate of the liquid crystal panel and attached to the lower surface of the second polarizer layer and the lower surface of the second polarizer layer; And a pressure-sensitive adhesive layer formed on one surface of the fourth TAC film, wherein the anti-glare layer has a 10-point surface roughness (Rz) value of 3.3 to 4.0 탆, an average distance Sm of surface irregularities, Wherein the thickness of the anti-glare layer is in the range of 1 to 1.5 占 퐉. And the liquid crystal display device.

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