KR20120066411A - Anti-glare film, polarizing plate and display device - Google Patents

Abstract

PURPOSE: An anti-glare film, a polarizing plate, and a display device are provided to improve darkness and visibility. CONSTITUTION: An anti-glare film(100) is composed of a base(160), an anti-glare layer(170), and a hard coating layer(180). The anti-glare layer is formed on one side of the base, is comprised of acrylic resin having first refraction rate, and includes polymer bead having second refraction rate. The hard coating layer is formed on one side of the anti-glare layer and is comprised of acryl resin having third refraction rate. The first refraction rate and third refraction rate are the same.

Description

Anti-glare film, polarizer and display device {ANTI-GLARE FILM, POLARIZING PLATE AND DISPLAY DEVICE}

The present invention relates to an anti-glare film, a polarizing plate, and a display device that can prevent glare and improve visibility.

Display devices such as cathode ray tube (CRT), plasma display panel (PDP), organic electroluminescent display (OELD), and liquid crystal display (LCD), An anti-glare film that reduces reflectance using the principle of optical interference is positioned on the outermost surface of the display device in order to prevent a decrease in contrast and a decrease in visibility due to reflection by external light and accommodation of a reflection image.

For example, the liquid crystal display of the display device is described, the liquid crystal display device is composed of two opposite electrodes and a liquid crystal layer formed between them, an electric field generated by applying a voltage to the two electrodes of the liquid crystal layer Drive the liquid crystal molecules. Liquid crystal molecules have polarization property and optical anisotropy. Polarization property means that when liquid crystal molecules are placed in an electric field, charges in the liquid crystal molecules are attracted to both sides of the liquid crystal molecules, and the direction of molecular arrangement changes according to the electric field. Refers to changing the path or polarization state of the emitted light differently according to the incident direction or the polarization state of the incident light due to the elongated structure of the liquid crystal molecules and the aforementioned molecular arrangement direction.

Accordingly, the liquid crystal display device has a liquid crystal display panel composed of a pair of transparent insulating substrates, each having a liquid crystal layer interposed therebetween and having a field generating electrode, as an essential component, and changing electric fields between the field generating electrodes. By artificially adjusting the alignment direction of the liquid crystal molecules through the display of various images using the light transmittance that is changed at this time.

At this time, the polarizing plate for visualizing the liquid crystal alignment change of the liquid crystal display device is positioned on the upper and lower portions of the liquid crystal display panel, the polarizing plate transmits the light of the polarization component corresponding to the transmission axis, the arrangement of the transmission axis and the liquid crystal The transmittance of light is determined by the arrangement characteristic of.

1A to 1B are schematic diagrams showing characteristics of light passing through a liquid crystal display panel.

The liquid crystal display device includes a liquid crystal display panel 10 and a backlight unit (not shown) for supplying light from a rear surface thereof, wherein the liquid crystal display panel 10 includes first and second surfaces facing each other with the liquid crystal layer 6 interposed therebetween. First and second polarizing plates 12 and 14 attached to the second substrates 2 and 4 and outer surfaces of the first and second substrates 2 and 4, respectively.

At this time, the inner surface of the first substrate 2 is provided with a plurality of pixels having a transparent pixel electrode and a thin film transistor for controlling the liquid crystal driving voltage delivered to each of the pixel electrodes on and off, the second substrate 4 The inner surface is provided with a color filter and a common electrode for color implementation.

In addition, the liquid crystal layer 6 interposed between the two substrates 2 and 4 is in the TN mode. The alignment state is twisted at 90 degrees from the first substrate 2 to the second substrate 4, and the polarization axes of the first and second polarizing plates 12 and 14 are perpendicular to each other.

Since the liquid crystal display panel 10 does not emit light by itself, a backlight unit (not shown) for supplying light to the liquid crystal display panel 10 is disposed on the rear surface of the liquid crystal display panel 10.

In the liquid crystal display panel 10, the light emitted from the backlight 20 when the voltage is off is only linearly polarized by the first polarizing plate 12 in parallel with its polarization axis, as shown in FIG. 1A. The light is transmitted and the remainder is absorbed and rotated by 90 degrees along its azimuth angle while passing through the liquid crystal layer 6 to thereby pass through the second polarizing plate 14 to display normal white.

Next, when the voltage is turned on, the liquid crystal molecules of the liquid crystal display panel 10 have 90-degree optical rotatory with long axes arranged perpendicularly to both substrates 2 and 4 as shown in FIG. 1B. power is lost, and linearly polarized light transmitted through the first polarizing plate 12 is blocked by the second polarizing plate 14 to display black.

On the other hand, the second polarizing plate 14 described above includes an anti-glare film (not shown) in order to prevent the glare caused by the external light, the light incident on the second polarizing plate 14 is an anti-glare film Diffusely diffused and dispersed by (not shown).

2 is a view showing the structure of a conventional anti-glare film.

As shown in FIG. 2, the anti-glare film includes a base 60 and an anti-glare layer 70 formed on one side of the base 60.

Substrate 60 is formed of a triacetyl cellulose (TAC) film or glass (glass), the thickness is about 80㎛.

The anti-glare layer 70 serves to prevent glare by scattering the light coming from the outside because the external light incident in a predetermined direction is reflected at a specific angle to cause glare at a specific viewing angle.

To this end, the anti-glare layer 70 is composed of an acrylic resin 72 serving as a binder, and includes a polymer bead 74, which is uneven on the surface of the anti-glare layer 70 by the polymer bead 74. Is formed.

The degree of surface irregularities, that is, the surface roughness value representing the surface roughness is formed to have a value of 0.5 ~ 2.5㎛. As a result of the irregularities thus formed, light incident from the outside diffuses and diffuses diffuse reflection.

Instead of the polymer beads 74 contained in the anti-glare layer 70, silica fine particles may be included. The diameter of the polymer beads 74 or the silica fine particles may be in the range of 0.5 to 2.5 μm, and the thickness of the anti-glare layer 70 may be formed in the range of 4 to 6 μm.

On the other hand, the anti-glare film having the structure as described above, the unevenness is exposed to the surface by the polymer bead 74 contained in the anti-glare layer 70, the grinding phenomenon occurs due to the friction caused by the external stimulus, the original scattering It was not functioning properly. In addition, as the content of the polymer bead 74 increases in order to scatter light incident from the outside, the anti-glare film becomes expensive.

In addition, in a bright room environment with external light, whitish phenomena appear due to the diffuse reflection in the anti-glare layer, the luminance decreases proportionally as light is diffused and dispersed by the anti-glare layer, and the color decrease due to the diffuse reflection and There is a problem that a difference in luminance for each region occurs.

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

Accordingly, an object of the present invention is to provide an anti-glare film, a polarizing plate and a display device having good contrast ratio and visibility while preventing glare.

In order to achieve the above object, the anti-glare film according to the present invention, the base material; An anti-glare layer formed on one surface of the substrate and made of an acrylic resin having a first refractive index and including polymer beads having a second refractive index; And a hard coat layer formed on one surface of the anti-glare layer and formed of the acrylic resin having a third refractive index, wherein the first refractive index and the third refractive index are the same.

The first refractive index and the third refractive index is characterized in that 1.5.

And, the polymer beads are characterized in that the particle diameter of the polymer series 3 to 5㎛.

In addition, the anti-glare layer is characterized in that it further comprises silica fine particles having a particle size of 3 to 5㎛ range to adjust the surface roughness.

Such, the anti-glare layer is characterized in that formed in a thickness of 6 to 7㎛ range.

And, the second refractive index is characterized in that 1.55 to 1.6.

In addition, the hard coat layer is characterized in that formed to a thickness of 1 to 2㎛.

A polarizing plate according to the present invention includes a polarizing layer having a transmission axis of light in one direction; First and second substrates attached to upper and lower surfaces of the polarizing layer, respectively; An anti-glare layer formed on one surface of the first substrate and made of an acrylic resin having a first refractive index and including polymer beads having a second refractive index; And a hard coat layer formed on one surface of the anti-glare layer and formed of the acrylic resin having a third refractive index, wherein the first refractive index and the third refractive index are the same.

A display device according to an embodiment of the present invention, the display panel for displaying an image using light; A first polarizing plate provided on a lower surface of the display panel and configured to polarize light provided to the display panel in a first direction; A second polarizing plate provided on an upper surface of the display panel and polarizing light from the display panel in a second direction perpendicular to the first direction, the second polarizing plate comprising: a substrate; An anti-glare layer formed on one surface of the substrate and made of an acrylic resin having a first refractive index and including polymer beads having a second refractive index; And a hard coat layer formed on one surface of the anti-glare layer and formed of the acrylic resin having a third refractive index, wherein the first refractive index and the third refractive index are the same.

According to another aspect of the present invention, there is provided a display apparatus including a display panel configured to display an image; An anti-glare layer comprising a base material on the front surface of the display panel, an acrylic resin having a first refractive index formed on one surface of the base material, and including polymer beads having a second refractive index, and a third anti-glare layer formed on one surface of the anti-glare layer; An anti-glare film comprising a hard coat layer made of the acrylic resin having a refractive index, wherein the first refractive index and the third refractive index is the same.

According to the anti-glare film, the polarizing plate and the display device according to the present invention, by forming a hard coat layer on the anti-glare layer to adjust the surface roughness and surface hardness, it is possible to manufacture a display device with good contrast ratio and visibility while preventing glare. .

In addition, the anti-glare layer can be prevented from being soiled by the hard coat layer.

1A and 1B are schematic diagrams showing characteristics of light passing through a liquid crystal display panel.
Figure 2 is a view showing the structure of a conventional anti-glare film.
Figure 3 is a view showing the structure of an anti-glare film according to an embodiment of the present invention.
Figure 4 is a photograph showing the actual shape of the anti-glare film according to an embodiment of the present invention.
5 is a view schematically showing the structure of a polarizing plate according to an embodiment of the present invention.
6 is a schematic cross-sectional view of a portion of a liquid crystal display panel according to an exemplary embodiment of the present invention.
Figure 7a is a graph showing the difference according to the white luminance value in the conventional liquid crystal display device and the liquid crystal display device to which the present invention is applied.
Figure 7b is a graph showing the difference according to the black luminance value in the conventional liquid crystal display device and the liquid crystal display device to which the present invention is applied.
Figure 7c is a graph showing the difference according to the contrast ratio in the conventional liquid crystal display device and the liquid crystal display device to which the present invention is applied.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

3 is a view showing the structure of an anti-glare film according to an embodiment of the present invention, Figure 4 is a photograph showing the actual shape of the anti-glare film according to an embodiment of the present invention.

As shown in FIG. 3, the anti-glare film 100 according to the present invention includes a substrate 160, an anti-glare layer 170 and an anti-glare layer 170 formed on one side of the substrate 160. It is characterized by consisting of a hard coat layer 180 formed on one side of.

Substrate 160 may be a tri-acetate cellulose (TAC) film, or glass (glass).

The anti-glare layer 170 is configured to prevent glare by scattering the light coming from the outside because the external light incident in a predetermined direction causes reflection at a specific angle to generate a glare at a specific viewing angle.

The anti-glare layer 170 is made of acryl-based resin 172, and includes a polymer bead 174 therein, the polymer bead 174 is a spherical shape (anti-glare layer) 170, the surface of the anti-glare layer 170 is a concave-convex shape by the polymer bead 174, whereby the light incident from the outside is diffuse reflection (scattering) diffused, dispersed by the anti-glare layer 170 do.

That is, the anti-glare layer 170 prevents the light from being partially concentrated by dispersing the light through the polymer bead 174 contained therein.

Here, the acrylic resin 172 constituting the anti-glare layer 170 serves as a binder to hold the polymer beads 174, the acrylic resin 172 is a polyester resin, polyether resin, acrylic resin , Epoxy resin, urethane resin, spiroacetyl resin, polybutadiene resin, polythiolpolyene resin and the like can be used.

Such, the refractive index of the acrylic resin 172 is preferably 1.5, the thickness of the acrylic resin 172 is preferably formed to have a range of 6 ~ 7㎛.

In addition, the polymer bead 174 contained in the anti-glare layer 170 is preferably a polymer series having a refractive index in the range of 1.55 to 1.6, and the diameter of the polymer bead 174 is preferably 3 to 5 μm, but other You can also change the size.

The surface roughness of the anti-glare layer 170 may be adjusted through the polymer beads 174 contained in the anti-glare layer 170. For example, the polymer beads 174 contained in the anti-glare layer 170 may be adjusted to 3. Surface roughness may be adjusted by including at least two kinds of diameters different from each other within a range of ˜5 μm, that is, a first polymer bead 174a having a first diameter and a second polymer bead 174b having a second diameter.

The diameter of the polymer beads 174 contained in the anti-glare layer 170 according to the present invention has a diameter larger than that of the polymer beads 74 contained in the conventional anti-glare layer (70 of FIG. 2) in a range of 3 to 5 μm and higher than that of the conventional polymer. The content of the beads can be reduced.

As such, the polymer beads 174 having a size of about 3 to 5 μm are contained in the anti-glare layer 170 at a lower density than the beads 74 contained in the conventional anti-glare layer (70 of FIG. 2). The surface roughness of 170 may be improved, and scattering by the polymer beads 174 may be reduced. Accordingly, a haze value indicating a scattering degree of light transmitted or reflected may also be lowered.

As such, contrast and visibility can be improved by reducing scattering and reducing black luminance.

Here, the contrast ratio is a measure of how clearly the image is seen on the screen of the liquid crystal display device, and is a ratio obtained by dividing the luminance value of the white state at the front center of the liquid crystal display panel by the luminance value of the black state. Is defined.

The luminance value in the black state is a value indicating the lowest luminance by minimizing the backlight light passing through the liquid crystal display panel of the liquid crystal display device, and the luminance value in the white state means the backlight light passing through the liquid crystal display panel of the liquid crystal display device. It is the maximum value and shows the highest luminance.

Visibility is evaluated depending on this contrast ratio.

Contrast ratio and visibility of such a liquid crystal display device can be adjusted by the surface roughness of the anti-glare film.

On the other hand, the hard coat layer 180 is a layer formed by coating an acrylic resin on the anti-glare layer 170, the surface roughness and surface hardness of the anti-glare film 100 by flattening the unevenness of the anti-glare layer 170 By reducing the haze while maintaining the internal scattering to reduce the external scattering of light incident from the outside serves to minimize the whitening phenomenon by the external light source.

In addition, the hard coat layer 180 is a layer coated on the outermost layer, and has an antifouling function so that the anti-glare layer 170 is not easily contaminated.

The hard coat layer 180 has a refractive index of 1.5, which is the same refractive index as the acrylic resin of the anti-glare layer 170, the thickness of the hard coat layer 180 is preferably formed to have a range of 1 ~ 2㎛.

As such, by forming the hard coat layer 180 on the anti-glare layer 170, surface roughness is improved to reduce external scattering, and the internal scattering by the anti-glare layer 170 is maintained to scatter light incident from the outside. At the same time, the scattered light can be concentrated to improve visibility.

Referring to FIG. 4, which shows an actual photo of the anti-glare film 100, the thickness of the anti-glare layer 170 and the hard coat layer 180 is 6.19 μm, and the polymer beads 174 contained in the anti-glare layer 170 are included. (Polymer series) has a diameter of 4.72㎛.

The anti-glare film, the anti-glare layer 170 is formed to have a thickness of 6 ~ 7㎛, the hard coat layer 180 is formed to have a thickness of 1 ~ 2㎛, the polymer contained in the anti-glare layer 170 Preferably, the beads are formed to have a diameter in the range of 3 to 5 μm.

In the present invention, in order to improve the surface roughness and surface hardness, a polymer-based polymer bead 174 having a diameter of 3 to 5㎛ range and a refractive index of 1.55 to 1.6 is inserted into the anti-glare layer 170, and the anti-glare layer 170 The hard coat layer 180 having the same refractive index as the acrylic resin 172 forming the anti-glare layer 170 is formed on the top.

Accordingly, the conventional anti-glare film had a haze value of 10%, but the anti-glare film 100 according to the present invention lowered the haze value to 3 to 6% to lower the value of black brightness to improve contrast ratio and visibility. Let's do it.

Although not shown in the drawings, the anti-glare layer 170 according to the present invention may further contain silica fine particles (not shown) in addition to the polymer beads 174, and the silica fine particles (not shown) maintain surface hardness. It may be contained to.

Such silica fine particles preferably have the same refractive index and diameter as the polymer-based polymer beads 174 contained in the anti-glare layer 170. Accordingly, silica fine particles having a refractive index of 1.55 to 1.6 and a diameter in the range of 3 to 5 μm may be further included in the anti-glare layer 170.

5 is a view schematically showing the structure of a polarizing plate according to the present invention, in particular to explain the structure of the polarizing plate to which the anti-glare film according to the present invention is applied. Here, the structure of the anti-glare film is the same as the structure of Figure 3, so a detailed description thereof will be omitted.

As illustrated in FIG. 5, the polarizing plate 200 includes a polarizing layer having an adhesive layer 250 for attaching the polarizing plate 200 to a substrate, a first base 252, and a polarization axis for changing polarization characteristics of light. 254 and an anti-glare film 100 composed of a second substrate 260, an antiglare layer 270, and a hard coat layer 280.

The adhesive layer 250 is formed on one side of the first substrate 252 to attach the polarizing plate 200 to the substrate (color filter substrate), and the lower portion of the adhesive layer 250 is attached to the polarizing plate 200 in the process of attaching the polarizing plate 200. Detachable to expose the adhesive layer 250 and may include a protective layer (not shown) that serves to protect the adhesive layer 250 from being contaminated in the process of transport and transport.

The first and second substrates 252 and 260 are formed on both surfaces of the polarizing layer 254 to maintain the stretched state of the polarizing layer 254, and protect and support the polarizing layer 254. Cellulose (tri-acetatecellulose (TAC) film or glass) may be used. Here, the second substrate 260 also supports the anti-glare layer 260.

The polarization layer 254 has a property that a transmission axis is formed in a predetermined direction so that only light having a component parallel to the transmission axis is transmitted. This property is made possible by stretching PVA (polyvinyl alcohol) absorbing iodine, which is a polarizer, with strong tension. In this case, the polarizing layer 254 according to the present invention is applied to the second polarizing plate 200b of FIG. 6 attached to the upper portion of the liquid crystal display panel 310 of FIG. 6. The transmission axis is formed to be polarized in a second direction perpendicular to the first direction.

The anti-glare film 100 is configured to prevent glare by scattering light incident from the outside because the external light incident in a predetermined direction of the polarizer 200 causes reflection at a specific angle to generate glare. .

The anti-glare film 100 is formed on one side of the second substrate 260 and the anti-glare layer 270 and the anti-glare layer 270 formed on one side of the second substrate 260. Consisting of a hard coat layer 280.

6 is a schematic view of a portion of a liquid crystal display device according to an exemplary embodiment of the present invention.

As shown in FIG. 6, the liquid crystal display device 300 according to the present invention includes a liquid crystal display panel including first and second substrates 312 and 314 bonded to each other with the liquid crystal layer 316 interposed therebetween. 310 and a backlight unit (not shown) disposed on the rear surface of the liquid crystal display panel 310.

A pixel P is defined by crossing gate and data lines on an inner surface of the first substrate 312, which is referred to as a double lower substrate or an array substrate. Each pixel P includes a pixel electrode 329. ) Is formed.

In addition, the thin film transistor T, which is a switching element composed of the gate electrode 321, the gate insulating film 323, the semiconductor layer 325, the source and drain electrodes 327a and 327b, is provided at the intersection of the gate wiring and the data wiring. It is.

A protective layer 328 is formed on the thin film transistor T.

The drain electrode 327b of the thin film transistor T is electrically connected to the pixel electrode 329.

The second substrate 314 facing the first substrate 312 is called an upper substrate or a color filter substrate, and the thin film transistor T, the gate wiring, and the data are formed on the inner surface of the second substrate 314. A black matrix 332 is provided to cover the non-display area irrelevant to the liquid crystal drive such as the edge of the pixel electrode 329 to suppress light leakage.

An example of R, G, and B color filters 334 is provided to correspond to the display area, respectively, and covers the black matrix 332 and the color filter 334 with the liquid crystal layer 316 interposed therebetween. The common electrode 336 facing the pixel electrode 329 is provided.

At this time, between the liquid crystal layer 316, the pixel electrode 329, and the common electrode 336, the first and second alignment layers 331a and 331b each having a surface rubbing toward the liquid crystal in a predetermined direction are interposed therebetween. Evenly align the initial alignment of the molecules with the orientation.

In addition, spacers 344 are dispersed in the liquid crystal layer 316 interposed between the first and second substrates 312 and 314 to maintain a constant cell gap, and the first and second substrates 312 provided with these components. 314, the sealants 346 adhere to each other and prevent leakage of the liquid crystal layer 316.

In addition, the first and second polarizing plates 200a and 200b are attached to the outer surfaces of the first and second substrates 312 and 314 to selectively pass only light that vibrates in a specific direction.

The first polarizing plate 200a is interposed between the lower portion of the display panel 310, the display panel 310, and a backlight unit (not shown) to allow only the light polarized in the first direction to pass through the display panel ( The second polarizing plate 200b is attached to the upper portion of the display panel 310 to pass only the light polarized in the second direction perpendicular to the first direction. .

In particular, the second polarizing plate 200b attached to the upper portion of the liquid crystal display panel 310 may include an adhesive layer (250 of FIG. 5) for attaching the second polarizing plate 200b to the second substrate 314, and the first polarizing plate 200b. 5, a polarization layer (254 of FIG. 5) having a polarization axis for converting polarization characteristics of light, and an anti-glare film (100 of FIGS. 3 and 5) according to the present invention. do.

Accordingly, the second polarizing plate 200b serves to scatter light incident from the outside in order to prevent glare caused by external light incident in a predetermined direction.

In the liquid crystal display device, when an on / off signal is applied to the thin film transistor T, the thin film transistor T transmits a pixel signal to the selected pixel electrode 329. The pixel electrode 329 and the common electrode generated at this time are generated. Due to the electric field difference between 336, the alignment direction of the liquid crystal molecules interposed therebetween is artificially controlled.

Accordingly, the light transmittance is determined while passing through the first polarizing plate 200a, the liquid crystal layer 316, and the second polarizing plate 200b, and the color according to the transmittance appears while passing through the color filter 334.

In particular, the present invention provides a liquid crystal display device having improved contrast ratio and visibility, which is characterized by the fact that the second polarizing plate 200b to which the anti-glare film (100 of FIGS. 3 and 5) having the surface roughness adjusted is applied to the liquid crystal display. By using it on the device.

FIG. 7A is a graph showing a difference according to a white luminance value of a conventional liquid crystal display device and a liquid crystal display device to which the present invention is applied, and FIG. 7B is a difference according to the black luminance value of the conventional liquid crystal display device and a liquid crystal display device to which the present invention is applied. FIG. 7C is a graph showing differences between contrast ratios between a conventional liquid crystal display device and a liquid crystal display device to which the present invention is applied.

Table 1 below shows the haze values of the conventional liquid crystal display device A (haze value = 10%) and the liquid crystal display devices B, C, and D (haze value = 6%, 5%, 3%) to which the present invention is applied. Table shows luminance values, black luminance values, and contrast ratio.

White luminance value Black luminance value Contrast Ratio (CR) A (haze value = 10%) 433.5 0.296 1467 B (haze value = 6%) 423.5 0.283 1495 C (haze value = 5%) 431.2 0.287 1504 D (haze value = 3%) 430.4 0.283 1519

First, referring to Table 1 and FIG. 7A, a white luminance value is determined based on white (excluding liquid crystal display device B of liquid crystal display devices B, C, and D having a haze value of 3%, 5%, and 6% according to the present invention). White) It can be seen that the luminance values C = 431.2 and D = 430.4 are similar to those of the white luminance value 433.5 of the conventional liquid crystal display apparatus A having a haze value of 10%.

Meanwhile, referring to the black luminance values with reference to Table 1 and FIG. 7B, black luminance values B of liquid crystal display devices B, C, and D having haze values of 3%, 5%, and 6% according to the present invention are described. = 0.283, C = 0.287, D = 0.283) is lower than 0.01 compared to the white luminance value (0.296) of the conventional liquid crystal display device A having a haze value of 10%, especially haze value of 6% and 3% It can be seen that the black luminance values of the liquid crystal display devices B and D having the lowest value are 0.283.

Looking at the contrast ratio associated with the white luminance value and the black luminance value with reference to Table 1 and Figure 7c, according to the invention of the liquid crystal display device B, C, D having a haze value of 3%, 5%, 6% The contrast ratio (B = 1495, C = 1504, D = 1519) is higher than the contrast ratio 1467 of the conventional liquid crystal display device A having a haze value of 10%, particularly a liquid crystal display device having a haze value of 3%. The high contrast ratio of D shows that the liquid crystal display device D is seen most clearly.

On the other hand, the liquid crystal display device has been described above as an example, but it can be applied to all display devices requiring anti-glare treatment. For example, the present invention can be applied to a cathode ray tube (CRT) device, a plasma display panel (PDP) device, and an organic electroluminescent display (OELD) device. In this case, the anti-glare layer according to the present invention is provided on the front surface of the display panel of the cathode ray tube display device, the plasma display device, or the organic electroluminescent display device.

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

160: first substrate 170, 270: anti-glare layer
172, 272: acrylic resin 174, 274: beads
180, 280: hard coat layer

Claims (10)

A base material;
An anti-glare layer formed on one surface of the substrate and made of an acrylic resin having a first refractive index and including polymer beads having a second refractive index;
A hard coat layer formed on one surface of the anti-glare layer and formed of the acrylic resin having a third refractive index,
The first refractive index and the third refractive index is the same anti-glare film.
The method of claim 1,
The first refractive index and the third refractive index is
Anti-glare film, characterized in that 1.5.
The method of claim 1
The polymer beads
Anti-glare film, characterized in that the polymer-based particle diameter of 3 to 5㎛.
The method of claim 3, wherein
The anti-glare layer
Anti-glare film, characterized in that it further comprises silica particles having a particle size of 3 to 5㎛ range to adjust the surface roughness.
The method of claim 3, wherein
The anti-glare layer
Anti-glare film, characterized in that formed in a thickness of 6 to 7㎛ range.
The method of claim 1,
The second refractive index is
Anti-glare film, characterized in that 1.55 to 1.6.
The method of claim 1,
The hard coat layer is
Anti-glare film, characterized in that formed in a thickness of 1 to 2㎛.
A polarizing layer having a transmission axis of light in one direction;
First and second substrates attached to upper and lower surfaces of the polarizing layer, respectively;
An anti-glare layer formed on one surface of the first substrate and made of an acrylic resin having a first refractive index and including polymer beads having a second refractive index;
A hard coat layer formed on one surface of the anti-glare layer and formed of the acrylic resin having a third refractive index,
The first refractive index and the third refractive index is the same polarizing plate.
A display panel which displays an image using light;
A first polarizing plate provided on a lower surface of the display panel and configured to polarize light provided to the display panel in a first direction;
A second polarizing plate provided on an upper surface of the display panel and polarizing light from the display panel in a second direction perpendicular to the first direction,
The second polarizing plate is
A base material;
An anti-glare layer formed on one surface of the substrate and made of an acrylic resin having a first refractive index and including polymer beads having a second refractive index;
A hard coat layer formed on one surface of the anti-glare layer and formed of the acrylic resin having a third refractive index,
And the first refractive index and the third refractive index are the same.
A display panel displaying an image;
An anti-glare layer comprising a substrate on the front surface of the display panel, an acrylic resin having a first refractive index formed on one surface of the substrate, and having a polymer bead having a second refractive index, and a third anti-glare layer formed on one surface of the anti-glare layer. An anti-glare film composed of a hard coat layer made of the acrylic resin having a refractive index,
And the first refractive index and the third refractive index are the same.

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