KR101747720B1 - Method of fabricating polarizing plate and liquid crystal display having the polarizing plate - Google Patents

Abstract

The present invention provides a method of manufacturing a polarizing plate capable of reducing thickness and cost and a liquid crystal display device having the polarizing plate.
A method of manufacturing a polarizing plate according to the present invention includes the steps of: forming an outer supporting layer having a first thickness; and an inner supporting layer having a second thickness; Wherein the step of forming at least one of the outer support layer and the inner support layer comprises the steps of applying a coating solution comprising cellulose acetate phionate onto the base film, ; And evaporating the solvent contained in the coating solution to form at least one of the outer supporting layer and the inner supporting layer in the form of a polymer film having a thickness of about 9 to 15 탆.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a polarizing plate and a liquid crystal display having the polarizing plate,

The present invention relates to a method of manufacturing a polarizing plate capable of reducing thickness and cost and a liquid crystal display device having the polarizing plate.

In general, a liquid crystal display device displays an image by adjusting the light transmittance of a liquid crystal having dielectric anisotropy using an electric field. Such a liquid crystal display device displays an image by adjusting the light transmittance of the liquid crystal using an electric field.

Such a liquid crystal display device includes a thin film transistor substrate and a color filter substrate which are adhered to each other, a spacer for keeping the cell gap constant between the two substrates, and a liquid crystal filled in the cell gap.

An upper polarizer is disposed on the outer surface of the color filter substrate, and a lower polarizer is disposed on the outer surface of the thin film transistor substrate.

Each of the upper polarizer plate and the lower polarizer plate has a polarizing film and a support layer formed on upper and lower sides to protect the polarizing film. The support layer is formed by casting cellulose triacetyl cellulose (TAC) film by casting method and then laminating the film to the polarizing film. The TAC film is formed by a casting method and is formed to a thickness of at least about 40 to 80 μm. Accordingly, the conventional polarizing plate is difficult to be thinned, and the TAC film is expensive, which causes a problem that the material cost of the polarizing plate increases.

In order to solve the above problems, the present invention provides a method of manufacturing a polarizing plate capable of reducing thickness and cost, and a liquid crystal display device having the polarizing plate.

According to an aspect of the present invention, there is provided a method of manufacturing a polarizing plate, the method including forming an outer support layer having a first thickness and an inner support layer having a second thickness; Wherein the step of forming at least one of the outer supporting layer and the inner supporting layer includes the steps of applying a coating solution containing cellulose acetate phionate onto the base film, ; And evaporating the solvent contained in the coating solution to form at least one of the outer supporting layer and the inner supporting layer in the form of a polymer film having a thickness of about 9 to 15 탆.

The first embodiment of the coating solution is formed by mixing 400 parts by weight of ethyl acetate with 100 parts by weight of cellulose acetate propionate at room temperature, and the solvent contained in the coating solution is dried at a temperature of about 120 degrees for one minute And is evaporated.

The phase retardation value in the thickness direction of at least one of the outer supporting layer and the inner supporting layer manufactured by the manufacturing method using the coating solution of the first embodiment is about -40 to -55 nm or -85 to 95 nm, Is formed to be about 0 to 0.5 nm.

A second embodiment of the coating solution is formed by mixing at room temperature 100 parts by weight of cellulose acetate propionate, 20 parts by weight of sucrose acetate isobutyrate, 510 parts by weight of methyl ethyl ketone and 170 parts by weight of cyclohexanone, The solvent contained in the solution is characterized by being dried at about 40 degrees for about 30 seconds and then evaporated through a drying process at 120 degrees for 1 minute.

The phase delay value in the thickness direction of at least one of the outer support layer and the inner support layer produced by the manufacturing method using the coating solution of the second embodiment is about 0 to -8 nm and the in-plane phase retardation value is about 0 to 0.5 nm As shown in FIG.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel; An upper polarizer disposed on a rear surface of the liquid crystal panel and including an upper polarizer; And a lower polarizer disposed on a front surface of the liquid crystal panel and including a lower polarizer layer, wherein at least one of the upper polarizer and the lower polarizer comprises a polarizer; An outer support layer attached to the polarizing film and formed with a first thickness; And an inner supporting layer formed to face the outer supporting layer with the polarizing film interposed therebetween and formed to have a second thickness, and at least one of the inner supporting layer and the outer supporting layer has a thickness of 9 to 15 mu m so as to include cellulose acetate phonate And is formed to have a thickness.

Wherein the outer support layer of each of the upper polarizer and the lower polarizer is formed to have a first thickness of 40 to 80 탆 so as to include cellulose triacetate and the inner support layer of each of the upper polarizer and the lower polarizer, Lt; RTI ID = 0.0 > um, < / RTI > and is formed to include cellulose acetate phonate.

The liquid crystal display further comprises a brightness enhancement film formed on the back surface of the outer support layer of the lower polarizer plate, the outer support layer of the lower polarizer plate is formed to have a thickness of 9 to 15 탆 so as to include cellulose acetate phonate, The inner supporting layer of the lower polarizer plate is formed to have a thickness of 9 to 15 mu m so as to include cellulose acetate phonate or to have a thickness of 40 to 80 mu m to include cellulose triacetate.

The outer support layer of the upper polarizer is formed to have a thickness of 40 to 80 탆 so as to include cellulose triacetate, and the inner support layer of the upper polarizer is formed to have a thickness of 9 to 15 탆 to include cellulose acetate phonate or cellulose triacetate And is formed to have a thickness of 40 to 80 탆 so as to include it.

When the liquid crystal display panel is a vertical electric field type liquid crystal panel, the retardation value in the thickness direction of at least one of the inner support layer and the outer support layer, which is formed to have a thickness of 9 to 15 탆 so as to include cellulose acetate phonate, -55 nm or -85 to 95 nm, and the in-plane phase retardation value is about 0 to 0.5 nm. When the liquid crystal display panel is a horizontal electric field type liquid crystal panel, the thickness of the liquid crystal display panel is set to 9-15 탆 to include cellulose acetate phonate The phase retardation value in the thickness direction of at least one of the inner support layer and the outer support layer is about 0 to -8 nm and the in-plane phase retardation value is about 0 to 0.5 nm.

The polarizing plate according to the present invention is formed of a coating film having a thin thickness and at least one of the inner support layer and the outer support layer and having the same characteristics as the TAC film. Accordingly, the polarizing plate according to the present invention can reduce the production cost by using a coating film which is thinner than the conventional TAC film and has a lower optical price than the TAC film. Further, it is possible to thin the liquid crystal display device to which the polarizing plate according to the present invention is attached.

1 is a perspective view illustrating a liquid crystal display device according to a first embodiment of the present invention.
2A to 2C are views for explaining a method of manufacturing the polarizer shown in FIG.
3 is a perspective view illustrating a liquid crystal display device according to a second embodiment of the present invention.
4A to 4C are views for explaining the method of manufacturing the polarizer shown in FIG.
5 is a perspective view showing a liquid crystal display device according to a third embodiment of the present invention.
6 is a perspective view showing another embodiment of the polarizing plate shown in Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

1 is a view showing a liquid crystal display device according to a first embodiment of the present invention.

The liquid crystal display device shown in FIG. 1 includes a vertical electric field type liquid crystal panel 132, an upper polarizer 110 and a lower polarizer 120.

The vertical electric field liquid crystal display panel 132 includes a liquid crystal layer and a thin film transistor substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween.

The thin film transistor substrate includes a pixel electrode formed in each sub pixel region defined by a gate line and a data line, a thin film transistor connected to the pixel electrode, and a lower alignment film applied for alignment of the liquid crystal layer.

The color filter substrate includes a black matrix for preventing light leakage, a color filter for color implementation, an overcoat layer for planarization, a common electrode having a vertical electric field with the pixel electrode, and an upper alignment layer applied for alignment of the liquid crystal layer do.

The liquid crystal layer is rotated by a vertical electric field between the pixel electrode and the common electrode, and the amount of light transmission is determined according to the degree of rotation of the liquid crystal layer.

Each of the upper polarizer 110 and the lower polarizer 120 transmits linearly polarized light parallel to its transmission axis with respect to incident light. The upper polarizer 130 is attached to the front surface of the color filter substrate of the vertical electric field type liquid crystal panel 132 through the adhesive layer 108 and the lower polarizer plate 120 is attached to the vertical electric field liquid crystal panel 132 through the adhesive layer 118. [ Of the thin film transistor substrate.

Each of the upper polarizer plate 110 and the lower polarizer plate 120 includes inner supporting layers 106 and 116, polarizing films 104 and 114, and outer supporting layers 102 and 112.

The outer support layers 102 and 112 are formed of triacetylcellulose (TAC) on one side of each of the upper polarizer film 104 and the lower polarizer film 114. The outer support layers 102 and 112 are formed to a first thickness of about 40 to 80 占 퐉. The outer support layer 122 serves to maintain the stretched state of the upper polarizer film 104 and the lower polarizer film 114 while supporting and protecting the upper polarizer film 104 and the lower polarizer film 114, respectively.

The polarizing films 104 and 114 are formed by adsorbing iodine or a dichroic dye to a polyvinyl alcohol (PVA) layer stretched in a specific direction. At this time, the absorption axis in the stretched direction and the transmission axis in the direction perpendicular to the absorption axis are formed. The polarizing films 104 and 114 absorb light of a component parallel to the absorption axis and transmit light of a component parallel to the transmission axis. The lower polarizing film 114 has a transmission axis parallel to the optical axis of the liquid crystal layer of the vertical electric field liquid crystal panel 132 and perpendicular to the transmission axis of the upper polarizing film 104, And selectively transmitted. The upper polarizing film 104 absorbs light of a component parallel to the absorption axis and transmits light of a component parallel to the transmission axis. The upper polarizing film 104 has a transmission axis perpendicular to the optical axis of the liquid crystal layer and perpendicular to the transmission axis of the lower polarizing film 114 so that light of a component parallel to the transmission axis is selectively transmitted.

The inner support layers 106 and 116 are formed of a polymer coating film containing cellulose acetate propionate (CAP) to protect the upper polarizer film 104 and the lower polarizer film 114, respectively. These inner support layers 106 and 116 are formed to a second thickness of about 9 to 15 占 퐉 which is thinner than the outer support layers 102 and 112. [ The phase delay value Rth and the in-plane phase retardation value Rin in the thickness direction of the inner supporting layers 106 and 116 are expressed by Equation (1).

In the formula (1), nx denotes the refractive index in the x direction in the inner supporting layers 106 and 116, ny denotes the refractive index in the y direction in the inner supporting layers 106 and 116, z denotes the refractive index in the thickness direction of the inner supporting layers 106 and 116, The thickness of the inner support layers 106 and 116, respectively.

The phase delay value Rth in the thickness direction of the inner supporting layers 106 and 116 is about -40 to -55 nm or -85 to 95 nm and the in-plane phase retardation value Rin is about 0 to 0.5 nm.

2A to 2C are cross-sectional views illustrating a method of manufacturing the inner support layers 106 and 116 shown in FIG.

First, 400 parts by weight of ethyl acetate is mixed with 100 parts by weight of cellulose acetate propionate (CAP) at room temperature to form a coating solution 184. Here, cellulose acetate propionate is formed, for example, by CAP-502-02 from EASTMAN, and ethyl acetate is used as a solvent. This coating solution 184 is stored in the storage container 186 as shown in FIG. 2A. The coating solution 184 stored in the storage container 186 is applied onto the base film 182 that has been subjected to release treatment through a nozzle. The base film 182 is formed of a resin such as polyethylene terephthalate (PET). Subsequently, the solvent contained in the coating solution 184 is evaporated through a drying process at 100 to 150 degrees for 50 seconds to 1 minute and 30 seconds as shown in FIG. 2B, thereby forming an inner supporting layer 106, 116 Is formed.

After the inner supporting layers 106 and 116 or the polarizing films 104 and 114 are coated with an adhesive (not shown), the inner supporting layers 106 and 116 are attached to the polarizing films 104 and 114 through an adhesive. Then, the base film 182 remaining on the inner support layers 106 and 116 is removed, thereby completing the upper polarizer 130 and the lower polarizer 120, respectively, as shown in FIG. 2C.

The results of the simulation of the optical characteristics of the polarizing plate formed by the manufacturing method of Figs. 2A to 2C are shown in Table 1. The numerical values set forth in Table 1 are illustrative and not intended to be limiting.

Front Black Luminance
[nit] Front White Luminance
[nit] CR (10: 1) CR Right and left viewing angles Upper viewing angle Lower viewing angle Conventional 0.577 300 520 50 27 56 Invention 0.490 298 608 63 36 58

As shown in Table 1, the polarizing plate according to the present invention has a contrast ratio CR and a viewing angle increased, a black luminance is decreased, and a white luminance is equivalent to that of a conventional polarizing plate, Color and white color are equivalent to conventional ones.

As described above, the polarizing plate according to the first embodiment of the present invention forms an inner supporting layer with a coating film comprising cellulose acetate propionate having an optical property equal to or more than that of the TAC film. Accordingly, the polarizing plate according to the first embodiment of the present invention is formed to have a thickness of 9 to 15 탆, which is about 25 to 70 탆 less than the conventional thickness of the inner supporting layer, so that the total thickness of the polarizing plate is 99 to 145 Mu m. Accordingly, the polarizing plate according to the first embodiment of the present invention can be made thin, and the cost can be reduced.

3 is a view illustrating a liquid crystal display device according to a second embodiment of the present invention.

The liquid crystal display device shown in FIG. 3 includes a horizontal electric field type liquid crystal panel 134, and an upper polarizer 110 and a lower polarizer 120.

The horizontal electric field type liquid crystal panel 134 includes a liquid crystal layer and a thin film transistor substrate and a color filter substrate facing each other with the liquid crystal layer therebetween.

The thin film transistor substrate includes a pixel electrode formed in each sub pixel region defined by a gate line and a data line, a common electrode forming a horizontal electric field with the pixel electrode, a thin film transistor connected to the pixel electrode, And a lower alignment film applied for alignment.

The color filter substrate includes a black matrix for preventing light leakage, a color filter for color implementation, an overcoat layer for planarization, and an upper alignment layer applied for alignment of the liquid crystal layer.

The liquid crystal layer is rotated by a horizontal electric field between the pixel electrode and the common electrode, and the light transmission amount is determined according to the degree of rotation of the liquid crystal layer.

Each of the upper polarizer 110 and the lower polarizer 120 transmits linearly polarized light parallel to its transmission axis with respect to incident light.

Each of the upper polarizer plate 110 and the lower polarizer plate 120 includes inner supporting layers 106 and 116, polarizing films 104 and 114, and outer supporting layers 102 and 112.

The outer support layers 102 and 112 are formed of triacetylcellulose (TAC) on one side of each of the upper polarizer film 104 and the lower polarizer film 114. The outer support layers 102 and 112 are formed to a first thickness of about 40 to 80 占 퐉. The outer support layer 122 serves to support and protect each of the upper polarizer film 104 and the lower polarizer film 114 while maintaining the stretched state of the upper polarizer film 104 and the lower polarizer film 114, respectively.

The polarizing films 104 and 114 are formed by adsorbing iodine or a dichroic dye to a polyvinyl alcohol (PVA) layer stretched in a specific direction. At this time, the absorption axis in the stretched direction and the transmission axis in the direction perpendicular to the absorption axis are formed. The polarizing films 104 and 114 absorb light of a component parallel to the absorption axis and transmit light of a component parallel to the transmission axis.

The inner support layers 106 and 116 are formed of a polymer coating film containing cellulose acetate propionate (CAP) to protect the upper polarizer film 104 and the lower polarizer film 114, respectively. These inner support layers 106 and 116 are formed to a second thickness of about 9 to 15 占 퐉 which is thinner than the outer support layers 102 and 112. [ The phase retardation value Rth and the in-plane phase retardation value Rin in the thickness direction of the inner supporting layers 106 and 116 are expressed by Equation (2).

In the equation (2), nx represents the refractive index in the x direction in the inner supporting layers 106 and 116, ny represents the refractive index in the y direction in the inner supporting layers 106 and 116, z represents the refractive index in the thickness direction of the inner supporting layers 106 and 116, The thickness of the inner support layers 106 and 116, respectively.

The phase delay value Rth in the thickness direction of the inner supporting layers 106 and 116 is about 0 to -8 nm, the in-plane phase retardation value Rin is about 0 to 0.5 nm, and the thickness is about 9 to 15 m.

4A to 4C are cross-sectional views illustrating a method of manufacturing the inner support layers 106 and 116 shown in FIG.

First, 100 parts by mass of cellulose acetate propionate (CAP), 20 parts by mass of sucrose acetate isobutylate, 510 parts by mass of Methyl Ethyl Ketone (MEK) And 170 parts by weight of hexanol (Cyclohexanone) are mixed to form a coating solution 194. Here, the cellulose acetate propionate is formed, for example, by CAP-482-20 of EASTMAN, methyl ethyl ketone and cyclohexanone are used as the solvent, sucrose acetate isobutyrate is used as the plasticizer (Plasticizer).

The coating solution 194 is stored in the storage container 196 as shown in FIG. 4A. The coating solution 194 stored in the storage container 196 is applied onto the base film 192 that has been subjected to release treatment through a nozzle or a spray or the like. The base film 192 is formed of a resin such as polyethylene terephthalate (PET). 4B, the solvent contained in the coating solution 194 is primarily dried at about 30 to 50 degrees for about 20 to 40 seconds, then dried at 100 to 150 degrees for 50 to 1 minute and 30 seconds Secondarily dried and evaporated to form inner support layers 106 and 116 having a thickness of about 9 to 15 mu m. Here, the primary drying step is a temporary hardening step to prevent the phase delay value from being developed during drying, and the secondary drying step is a final hardening step in which the solvent contained in the coating solution is evaporated and the coating solution is dried do. As described above, the inner supporting layers 106 and 116 of the second embodiment of the present invention have different drying conditions from those of the inner supporting layer of the first embodiment of the present invention, and are different from the inner supporting layer of the first embodiment of the present invention And has a delay value.

After the inner supporting layers 106 and 116 or the polarizing films 104 and 114 are coated with an adhesive (not shown), the inner supporting layers 106 and 116 are attached to the polarizing films 104 and 114 through an adhesive. Then, the base film 182 remaining on the inner support layers 106 and 116 is removed, thereby completing the upper polarizer 130 and the lower polarizer 120, respectively, as shown in FIG. 4C.

The results of the simulation of the optical characteristics of the polarizing plate formed by the manufacturing methods of Figs. 4A to 4C are shown in Table 2. The numerical values set forth in Table 2 are examples, but are not limited thereto.

Front Black Luminance
[nit] Front White Luminance
[nit] CR (10: 1) Right and left viewing angles Upper viewing angle Lower viewing angle Conventional 0.3466 462 72 75 78 Invention 0.3452 457 80 82 86

As shown in Table 2, the polarizing plate according to the present invention has the contrast ratio CR and viewing angle increased, the black luminance is decreased, and the white luminance is equal to that of the conventional polarizing plate, Color and white color are equivalent to conventional ones.

As described above, the polarizing plates 110 and 120 according to the second embodiment of the present invention form an inner support layer with a coating film comprising cellulose acetate propionate having an optical property equal to or more than that of the TAC film. The thickness of the inner supporting layer of the polarizing plates 110 and 120 according to the second embodiment of the present invention is reduced to about 9 to 15 占 퐉, which is about 25 to 70 占 퐉 smaller than that of the conventional polarizing plates 110 and 120. Thus, the polarizing plates 110 and 120 have a total thickness of 130 to 210 占And is formed to have a thickness of 99 to 145 mu m. Accordingly, the polarizers 110 and 120 according to the second embodiment of the present invention can be made thin, thereby reducing the cost.

5 is a perspective view showing a liquid crystal display device according to a third embodiment of the present invention

The liquid crystal display device shown in FIG. 5 includes a liquid crystal panel 130, an upper polarizer 110 and a lower polarizer 120.

The liquid crystal panel 130 includes a liquid crystal layer and a thin film transistor substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween. The liquid crystal panel 130 is formed of any one of the liquid crystal panels shown in FIGS.

Each of the upper polarizer 110 and the lower polarizer 120 transmits linearly polarized light parallel to its transmission axis with respect to incident light.

The upper polarizer plate 110 includes an inner support layer 106, an upper polarizer film 104, and an outer support layer 102. The lower polarizer 120 includes a brightness enhancement film 140, an inner support layer 116, a lower polarizer film 114, and an outer support layer 112.

The inner supporting layers 106 and 116 of the upper polarizer 110 and the lower polarizer 120 are formed of triacetate cellulose (TAC) on the other side of the upper polarizer 104 and the lower polarizer 114, respectively And is formed into a polymer coating film containing cellulose acetate propionate (CAP) as shown in FIG. The inner supporting layers 106 and 116 are formed to protect the upper polarizing film 104 and the lower polarizing film 114, respectively. The phase delay value Rth in the thickness direction of the inner supporting layers 106 and 116 is about -40 to -60 nm or 0 to -8 nm and the in-plane phase retardation value Rin is about 0 to 0.5 nm. When the inner supporting layers 106 and 116 are formed by the TAC film, the inner supporting layers 106 and 116 are formed to a thickness of about 40 to 80 탆. When the inner supporting layers 106 and 116 are formed of the CAP film, Is formed to a thickness of about 9 to 15 mu m.

The outer supporting layer 102 of the upper polarizer 110 is formed of triacetate cellulose (TAC) on one side of the upper polarizer film 104. The outer support layer 102 is formed to a first thickness of about 40 to 80 占 퐉. The outer support layers 102 and 112 of the upper polarizer 110 serve to support and protect the upper polarizer film 104 while maintaining the stretched state of the upper polarizer film 104.

The supporting layer 112 of the lower polarizer 120 can be formed thinner than the outer supporting layer 102 of the upper polarizer 110 because the supporting force of the lower polarizer 120 can be maintained by the brightness enhancement film 140 . The outer support layer 112 of the lower polarizer 120 is a polymer coating film containing cellulose acetate propionate (CAP) on one side of the lower polarizer 114, Lt; RTI ID = 0.0 > to 15 < / RTI > The outer supporting layer 112 of the lower polarizing plate 120 serves to support and protect the lower polarizing film 114 while maintaining the respective elongated states of the lower polarizing films 114. The retardation value Rth in the thickness direction of the outer supporting layer 112 of the lower polarizer 120 is about -40 to -60 nm or 0 to -8 nm and the in-plane retardation value Rin is about 0 to 0.5 nm .

The brightness enhancement film 140 of the lower polarizing plate 120 is attached to the back surface of the outer supporting layer of the lower polarizing plate 104. The brightness enhancement film 140 improves the brightness by reusing light by reflecting the returned light without passing through the upper polarizer 110 and the lower polarizer 120 toward the upper polarizer 110 and the lower polarizer 120.

As described above, the polarizing plate according to the third embodiment of the present invention is formed to have a thickness of at least one of the inner support layer and the outer support layer of 9 to 15 占 퐉, which is about 25 to 70 占 퐉, Which is thinner than the conventional polarizer. Accordingly, the polarizing plate according to the third embodiment of the present invention can be made thin, and the cost can be reduced.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of.

110: upper polarizer 120: lower polarizer
130, 132, 134: liquid crystal panel 140: luminance enhancement film

Claims (10)

Forming an outer support layer having a first thickness and an inner support layer having a second thickness;
And attaching the outer support layer and the inner support layer to the polarizing film,
Wherein forming at least one of the outer support layer and the inner support layer comprises:
Applying 400 parts by weight of ethyl acetate to 100 parts by weight of cellulose acetate propionate at room temperature to form a coating solution on the base film;
And evaporating the solvent contained in the coating solution through a drying process at 120 ° C. for 1 minute to form at least one of the outer supporting layer and the inner supporting layer in the form of a polymer film having a thickness of 9 to 15 μm Of the polarizing plate. delete delete Forming an outer support layer having a first thickness and an inner support layer having a second thickness;
And attaching the outer support layer and the inner support layer to the polarizing film,
Wherein forming at least one of the outer support layer and the inner support layer comprises:
Applying a coating solution formed on the base film by mixing 100 parts by mass of cellulose acetate propionate, 20 parts by mass of sucrose acetate isobutyrate, 510 parts by mass of methyl ethyl ketone and 170 parts by mass of cyclohexanone at room temperature;
The solvent contained in the coating solution was dried at 40 ° C. for 30 seconds and evaporated through a drying process at 120 ° C. for 1 minute to form at least one of the outer support layer and the inner support layer in the form of a polymer film having a thickness of 9 to 15 μm To form a polarizing plate. delete A liquid crystal panel;
An upper polarizer disposed on a rear surface of the liquid crystal panel and including an upper polarizer;
And a lower polarizer disposed on a front surface of the liquid crystal panel and including a lower polarizer layer,
At least one of the upper polarizer and the lower polarizer is
A polarizing film;
An outer support layer adhered to the polarizing film and formed to have a first thickness of 40 to 80 탆 to include cellulose triacetate;
And an inner supporting layer formed to face the outer supporting layer with the polarizing film interposed therebetween and having a second thickness of 9 to 15 mu m which is thinner than the first thickness. The method according to claim 6,
Further comprising a brightness enhancement film formed on the back surface of the outer support layer of the lower polarizer plate,
The outer support layer and the inner support layer of the lower polarizer plate are formed to have a thickness of 9 to 15 탆 so as to include cellulose acetate phonate,
The outer supporting layer of the upper polarizer is formed to have a thickness of 40 to 80 탆 so as to include cellulose triacetate,
Wherein the inner supporting layer of the upper polarizer is formed to have a thickness of 9 to 15 탆 so as to include cellulose acetate phonate. A liquid crystal panel;
An upper polarizer disposed on a rear surface of the liquid crystal panel and including an upper polarizer;
And a lower polarizer disposed on a front surface of the liquid crystal panel and including a lower polarizer layer,
Further comprising a brightness enhancement film formed on the back surface of the outer support layer of the lower polarizer plate,
Wherein the outer support layer of the lower polarizer plate is formed to have a thickness of 9 to 15 mu m so as to include cellulose acetate phonate.
delete delete

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