KR101840356B1 - Liquid crystal display device and method of fabricating the same - Google Patents

Abstract

A liquid crystal display device comprising: a liquid crystal panel including an array substrate, a color filter substrate and a liquid crystal layer; A first polarizer attached to the outer surface of the array substrate; A backlight unit provided on an outer surface of the first polarizer; A second polarizer attached to an outer surface of the color filter substrate and hard coated; Layer structure in which a first inorganic film and a second inorganic film alternately stacked on the outer surface of the second polarizing plate are laminated alternately and the thin film of the multilayer structure is formed at the time of turning off the backlight unit And a monochromatic light is displayed by selectively reflecting external light, and a method of manufacturing the same.

Description

[0001] The present invention relates to a liquid crystal display device and a manufacturing method thereof,

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device which can realize a monochromatic color in a display area even when the backlight is off, and a method of manufacturing the same.

Recently, liquid crystal display devices have been attracting attention as next generation advanced display devices with low power consumption, good portability, and high value-added.

Of these liquid crystal display devices, an active matrix type liquid crystal display device having a thin film transistor, which is a switching device capable of controlling voltage on and off for each pixel, .

In general, a liquid crystal display device forms an array substrate and a color filter substrate through an array substrate manufacturing process for forming thin film transistors and pixel electrodes, and a color filter substrate manufacturing process for forming color filters and common electrodes, And a liquid crystal interposed therebetween.

The configuration of the liquid crystal display device will be described in more detail with reference to Fig. 1, which is a schematic sectional view of a general liquid crystal display device.

As shown in the drawing, a general liquid crystal display device 1 includes an array substrate 10 and a color filter substrate 20, and a liquid crystal layer (not shown) interposed between the two substrates 10 and 20 have. A plurality of gate wirings and data wirings are formed on the lower array substrate 10 to define a plurality of pixel regions arranged in an intersecting relationship with each other. A thin film transistor serving as a switching device is provided at an intersection of the two wirings, The pixel region is connected to a drain electrode of the thin film transistor and includes a pixel electrode.

On the inner surface of the upper portion of the color filter substrate 20 facing the array substrate 10 having such a configuration, each pixel region is bordered to cover the non-display region such as the gate wiring, the data wiring, A color filter layer including red, green, and blue color filter patterns sequentially and repeatedly arranged in correspondence to the respective pixel regions is formed in these lattices, and the black matrix and the color filter layer And a transparent common electrode is provided over the entire surface.

The first and second polarizers 31 and 32 have polarization axes orthogonal to each other on the outer surfaces of the two substrates 10 and 20. The first and second polarizers 31 and 32 are disposed on the outer surface of the array substrate 10, A back-light unit 40 is provided on the outer surface of the first polarizing plate 31.

In the liquid crystal display device 10 having such a configuration, when the backlight unit 40 is turned on, the light emitted from the backlight unit 40 is appropriately adjusted in luminance by liquid crystal driving in each pixel region, A colored image is implemented in the display area. When the backlight unit 40 is off, the display area displays a black state.

Such a liquid crystal display device 1 is recently used in various IT application products and household electric appliances such as TVs, multivision, notebooks, monitors, mobile phones, personal portable devices, and the like.

On the other hand, recent IT products and home appliances are designed with their own performance and design aspects, and especially designed to harmonize the surrounding environment and color of these IT products and home appliances.

Therefore, in recent years, there has been a demand for a liquid crystal display device in which a display area has various colors other than black even in a state in which the backlight unit is turned off.

In order to solve the above problems, in the present invention, the outer surface of the second polarizing plate provided on the outer surface of the color filter substrate is subjected to special treatment to selectively reflect external light, so that the backlight unit is turned off, And a liquid crystal display device capable of displaying a liquid crystal display.

According to an aspect of the present invention, there is provided a liquid crystal display device comprising: a liquid crystal panel including an array substrate, a color filter substrate, and a liquid crystal layer; A first polarizer attached to the outer surface of the array substrate; A backlight unit provided on an outer surface of the first polarizer; A second polarizer attached to an outer surface of the color filter substrate and hard coated; Layer structure in which a first inorganic film and a second inorganic film alternately stacked on the outer surface of the second polarizing plate are laminated alternately and the thin film of the multilayer structure is formed at the time of turning off the backlight unit And external light is selectively reflected to display monochromatic light.

Wherein the thin film of the multilayer structure is a double layer or more, and the first inorganic film is preferentially formed on the second polarizing plate so that the first inorganic film located at the lowermost portion of the second polarizing plate is in contact with the second polarizing plate Wherein the thin film of the multi-layer structure comprises an odd-numbered layer and the uppermost layer thereof is formed of the first inorganic film.

The first inorganic film is made of titanium oxide (TiO ₂ ), and the second inorganic film is made of silicon oxide (SiO ₂ ). The first inorganic film and the second inorganic film have a thickness of several nm To several hundreds nm.

The second polarizing plate hard-coated includes a PVA layer having a polarizer, first and second TAC layers provided on both sides of the PVA layer, an adhesive layer provided on the outer surface of the first TAC layer, Wherein the protective film is made of a UV curable acrylic material and the organic or inorganic coating solution containing colloidal silica particles is applied on the outer surface of the protective film And a coating film serving to improve curability.

And the second polarizing plate has a smooth property without a bent portion on its surface.

Further, the UV curable acrylic seal material is characterized by being one of polyester, acrylate, urethane acrylate and epoxy acrylate.

A method of manufacturing a liquid crystal display according to an embodiment of the present invention includes the steps of: fabricating a liquid crystal panel including an array substrate, a color filter substrate, and a liquid crystal layer; Attaching a first polarizer to the outer surface of the array substrate; Attaching a hard-coated second polarizing plate to the outer surface of the color filter substrate; The liquid crystal panel having the first and second polarizing plates attached thereto is placed on the stage in the vacuum chamber of the chemical vapor deposition apparatus so that the first polarizing plate and the upper surface of the stage are in contact with each other and the reaction gas atmosphere in the vacuum chamber is alternately changed, And forming a thin film having a multilayer structure by sequentially laminating the first inorganic film and the second inorganic film alternately.

In this case, the step of mounting the backlight unit on the outer surface of the first polarizer of the liquid crystal panel in which the thin film of the multi-layer structure is formed.

The deposition of the first and second inorganic films is characterized in that the temperature atmosphere in the vacuum chamber is in the range of room temperature to 80 DEG C, and the thin film of the multilayer structure is a double layer or more. The first inorganic film is preferentially formed over the second inorganic film.

The thin film of the multi-layer structure is formed as an odd-numbered layer, and the uppermost layer of the thin film is formed of the first inorganic film.

The first inorganic film is made of titanium oxide (TiO ₂ ), and the second inorganic film is made of silicon oxide (SiO ₂ ).

The first inorganic film and the second inorganic film are each formed to have a thickness of several nm to several hundreds nm.

The liquid crystal display according to the present invention can form a multi-layered thin film on the outer surface of the polarizing plate provided on the outer surface of the color filter substrate to selectively reflect external light of a specific wavelength band in the display area, So that it can be harmonized with the external environment.

Further, the polarizing plate is hard-coated to prevent lifting of the thin film of the multilayer, and the fingerprint is prevented from being stuck on the touch of the user and the moisture permeation is blocked.

The polarizing plate is manufactured through a low-temperature manufacturing process, so that the surface of the polarizing plate is flat without bending, so that there is no distortion of light upon reflection of external light, and thus, the reflective display quality is excellent.

In addition, since a reinforcing glass or the like is not required to prevent lifting when forming a multilayer thin film, the manufacturing cost can be reduced by reducing the material cost, and it is possible to provide a lightweight, thin liquid crystal display device by omitting the tempered glass .

1 is a schematic cross-sectional view of a general liquid crystal display device.
2 is a cross-sectional view of a part of a display region of a liquid crystal display device according to the present invention.
3 is a schematic cross-sectional view of a display region of a liquid crystal display device according to a comparative example.
4A to 4D are sectional views of a manufacturing process showing a first manufacturing method of a liquid crystal display device according to an embodiment of the present invention.
5A to 5E are sectional views of a manufacturing process showing a second manufacturing method of a liquid crystal display device according to an embodiment of the present invention.
FIG. 6 is a photograph showing a multilayer thin film formed on a polarizing plate having smoothness characteristics, which is used in an embodiment of the present invention, and then reflecting the thin film. FIG.
FIG. 7 is a photograph showing a multilayer thin film formed on a general polarizing plate as a comparative example, and then reflecting the thin film.

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

2 is a cross-sectional view of a portion of a display region of a liquid crystal display device according to the present invention.

A liquid crystal display device 101 according to an embodiment of the present invention includes a liquid crystal panel 105 including an array substrate 110, a color filter substrate 150 and a liquid crystal layer 180, The first and second polarizing plates 185 and 187 provided on the outer surface of the panel 105 and the thin film of the multilayer structure provided on the outer surface of the second polarizing plate 187 and the outer surface of the first polarizing plate 185 As shown in FIG.

First, the configuration of the liquid crystal panel 105 will be described.

The liquid crystal panel 105 includes an array substrate 110, a color filter substrate 150, and a liquid crystal layer 180 interposed between the two substrates. A plurality of gate lines (not shown) and data lines (not shown) intersect each other on the inner surface of the array substrate 110 to define a plurality of pixel regions P.

A thin film transistor Tr, which is a switching element, is formed in each of the plurality of pixel regions P at the same time as the gate wiring (not shown) and the data wiring (not shown). At this time, the thin film transistor Tr includes a gate electrode 115, a gate insulating film 117, an active layer 120a of pure amorphous silicon, and an ohmic contact layer 120b of impurity amorphous silicon, The semiconductor layer 120 and source and drain electrodes 133 and 136 spaced apart from each other. The gate electrode 115 is connected to the gate wiring (not shown) Is connected to the data line (not shown).

A protective layer 140 having a drain contact hole 143 exposing the drain electrode 136 of the thin film transistor Tr is formed on the entire surface of the display region of the thin film transistor Tr, The drain electrode 136 contacts the drain electrode 140 through the drain contact hole 143 and the pixel electrode 145 is formed.

Although the pixel electrode 145 has a plate shape in each pixel region P in the exemplary embodiment of the present invention, the pixel electrode 145 may have a plurality of bar shapes As shown in FIG.

When the pixel electrode 145 has a plurality of bar shapes, a plurality of bar-shaped common electrodes alternate with the plurality of bar-shaped pixel electrodes, And is connected to the plurality of bar-shaped common electrodes to further form a common wiring.

Or in a form having a plurality of bar-shaped openings corresponding to the plate-shaped pixel electrodes 145 in the respective pixel regions P via an insulating layer over the plate-shaped pixel electrodes 145 A common electrode may be formed on the entire surface of the region.

The TN mode liquid crystal panel 105 forms only the plate-shaped pixel electrode 145 in each pixel region P on the array substrate 110. The bar-shaped pixel electrode and the common electrode alternate And a fringe field switching mode liquid crystal panel (not shown) is formed when the plate-shaped pixel electrode and the common electrode having the opening are formed.

In the drawing, for example, a TN mode liquid crystal panel 105 in which a plate-shaped pixel electrode 145 is formed in each pixel region P is shown in the array substrate 110.

(Not shown), a data wiring (not shown), and a thin film transistor Tr are formed on the inner surface of the color filter substrate 150, which is located on the upper side of the array substrate 110 having the above- A black matrix 153 having a lattice shape for framing each pixel region P is formed so as to cover the pixel regions P in the pixel region P surrounded by the black matrix 153, And a color filter layer 155 including blue color filter patterns 155a, 155b and 155c are formed.

In addition, a transparent common electrode 158 is provided on the entire surface of the display area covering the color filter layer 155.

As a modified example, a case where a plurality of bar-shaped pixel electrodes and a common electrode are provided on the array substrate 110, a case where a plate-shaped pixel electrode is formed on the array substrate 110, The transparent common electrode 158 may be omitted from the color filter substrate 150 and the color filter layer 155 may be formed on the color filter substrate 150 to cover the color filter layer 155, (Not shown) may be formed.

A liquid crystal layer 180 is provided between the array substrate 110 and the color filter substrate 150 having the above-described configuration. Although not shown in the drawing, the liquid crystal layer 180 is prevented from leaking, A seal pattern (not shown) is provided along the edge between the two substrates so as to form a panel by maintaining the state where the color filter substrate 110 and the color filter substrate 150 are attached.

A first polarizer 185 having a polarization axis in a first direction is provided on the outer surface of the color filter substrate 150 of the liquid crystal panel 105 having the above- And a backlight unit 189 for supplying light to the liquid crystal panel 105 is provided at a lower portion thereof.

Next, a second polarizer 187 having a polarization axis in a second direction perpendicular to the first direction is provided on the outer surface of the array substrate 110.

At this time, the second polarizing plate 187 has a smoothness characteristic and its surface is hard coated. That is, although not shown in the drawing, the second polarizer 187 may include a PVA layer having a polarizer that selectively transmits only light that vibrates in a predetermined direction, and a second polarizer And a protective film and an adhesive layer constituting the base and the first and second TAC layers.

At this time, the first and second TAC layers and the PVA layer are laminated through a sticky material and then subjected to a first aging treatment through heating in order to secure the smooth property of the second polarizer plate 187 , The laminated first TAC layer, the PVA layer, and the third TAC layer and the protective film are laminated through an adhesive material and subjected to a secondary aging treatment. In the first and second aging treatments, The polarizing plate is manufactured so as to have the smoothness characteristic in which the protective film or the surface of the first and second TACs is suppressed from being bent by performing the first and second aging in a temperature atmosphere lower than a heating temperature applied at the time of manufacturing the polarizing plate to be.

The occurrence of the bending on the surface of the protective film or the first and second TAC layers may be caused by an adhesive material interposed between the first and second TAC layers and between the first and second TAC layers and between the first and second TAC layers during the laminating process. This is because contraction occurs due to heat applied at the aging.

The liquid crystal display device according to the embodiment of the present invention is provided with the hard coating treatment and the multilayer thin film on the outer surface of the second polarizer plate so that the multilayer thin film acts as a reflector so that only light of a specific wavelength band The first polarizer is selectively reflected to display monochromatic colors that match well with the colors of the instruments disposed around the polarizer. When bending occurs on the surface of the second polarizer, the reflected light may be distorted and displayed as a blur .

Therefore, in the embodiment of the present invention, as described above, the first and second aging treatment in a relatively low-temperature atmosphere to provide a second polarizing plate having a smoothness characteristic without surface bending phenomenon .

At this time, the adhesive material interposed when laminating the first and second TAC layers and the PVA layer, and the adhesive material interposed between the first TAC layer, the PVA layer, and the third TAC layer in the laminated state, The adhesive material is characterized in that it is made of a material which is adhered well even when the aging proceeds in a relatively low temperature atmosphere.

FIG. 6 is a photograph of a multilayer thin film formed on a polarizing plate having smoothness characteristics used in an embodiment of the present invention, and then reflecting the thin film. FIG. 7 shows a comparative example in which a multilayer thin film is formed on a general polarizing plate This is a picture taken from the reflection.

Referring to FIG. 6, when a multi-layered thin film is provided on a polarizing plate having smoothness characteristics, it is particularly smoothly reflected at the boundary between a bright portion and a dark portion. However, in the case where a multilayered thin film is provided on a general polarizing plate It can be seen that the boundary between the bright part and the dark part is very roughly expressed.

Therefore, it can be seen that the display provided with the smooth polarizing plate in the reflection image implementation has an excellent display quality as compared with the comparative example provided with the general polarizing plate.

On the other hand, the protective film is made of a UV curable acrylic material such as polyester, acrylate, urethane acrylate and epoxy acrylate. Although the protective film of the second polarizer 187 is not shown in the drawing, various organic or inorganic coating liquids including colloidal silica particles are applied to improve hardness and abrasion resistance to improve hardenability A coating film is provided.

The second polarizing plate 187 is hard coated so that the occurrence of lifting of the multi-layered thin film 190 can be suppressed even if the multi-layered thin film 190 is provided on the second polarizing plate 187.

On the other hand, referring to FIG. 3 (a schematic sectional view of the display area of the liquid crystal display device according to the comparative example), as a comparative example, a general polarizing plate, which is not subjected to hard coating treatment like the first polarizing plate 185, The protective film of the second polarizer 287 and the multi-layered thin film 290 are formed on the outer surface of the second polarizer 287, The second polarizing plate 287 may be peeled off from the end of the second polarizing plate 287 due to a poor bonding strength between the first polarizing plate 287 and the second polarizing plate 287. To prevent this, Respectively.

However, in the case of the liquid crystal display device 201 according to the comparative example having such a configuration, that is, the protective substrate 295, a separate transparent protective substrate 295 is additionally provided, And the manufacturing cost is increased.

Therefore, in contrast to the liquid crystal display device 201 according to the comparative example in which the protective substrate 295 is further provided to prevent the floating of the thin film 290 of the multilayer after the multilayer thin film 290 is formed The liquid crystal display device 101 according to the present invention can realize a thin and lightweight structure, and is excellent in reducing the manufacturing cost.

Referring to FIG. 2, in the liquid crystal display device 101 according to the embodiment of the present invention, titanium oxide (TiO ₂ ), which is an inorganic insulating material, is formed on the outer surface of the second polarizer plate 187, and it is characterized in that silicon oxide (SiO ₂₎ as the first inorganic film (190a) and the second thin film 190 of the multilayer structure of the inorganic film is made of alternately and sequentially formed, each being formed. At this time, the thin film 190 of the multilayer structure has at least a first inorganic film 190a and a second inorganic film 190b stacked at least once, and has a stack structure of a minimum of two or more layers, 2 inorganic films 190a and 190b are stacked two or more times to have a laminated structure of four or more layers.

The thin film 190 of the multilayer structure is formed such that the first inorganic film 190a made of titanium oxide (TiO ₂ ) is in contact with the second polarizer 187, and the first inorganic film 190a, The uppermost layer of the thin film 190 having the multi-layer structure is preferably a first inorganic film 190a made of titanium oxide (TiO ₂ ).

The first inorganic film 190a made of titanium oxide (TiO ₂ ) is preferentially formed on the second polarizing plate 187 in preference to the second inorganic film 190b made of silicon oxide (SiO ₂ ) TiO ₂ ) and the second polarizing plate 187 is superior to the bonding force between the silicon oxide (SiO ₂ ) and the second polarizing plate 187, thereby maximizing the effect of preventing lifting.

And, It is to occur the top layer of the thin film 190 of the multi-layer to the first inorganic film (190a) made of titanium oxide (TiO ₂₎ film the film consisting of a titanium oxide (TiO ₂₎ made of silicon oxide (SiO ₂₎ So that it is possible to minimize the occurrence of unevenness when the user touches the display area.

 The multilayer thin film 190 formed on the second polarizer plate 187 is formed by appropriately adjusting the thickness of the thin film 190 and the number of the first and second inorganic films 190a and 190b, So that only monochromatic light is displayed by reflecting only light of a specific wavelength band.

The refractive index of the first inorganic film 190a made of titanium oxide (TiO ₂ ) is 2.46, the refractive index of the second inorganic film 190b made of the silicon oxide is 1.49, and the refractive index of the two inorganic films 190a and 190b When external light is incident on the thin film 190 of the multi-layered structure due to a difference in refractive index of the multi-layer structure 190, absorption and reflection selectively proceed by the refractive index difference at the boundary between the two material layers, It can be done.

At this time, the first and first inorganic films 190a have a thickness of several nm to several hundreds of nm, all may have the same level of thickness, or may have different thicknesses in the above-mentioned range.

On the other hand, the liquid crystal display device 101 according to the embodiment of the present invention having the above-described configuration realizes an image of full color when the backlight unit 189 is driven in an on state, 189 are turned off, only the light of a specific wavelength band is selectively reflected to the external light incident on the display region of the liquid crystal display device 101, and monochromatic light such as red, green, blue or silver It is a great advantage to match with the colors of instruments and the like placed around by displaying them.

Hereinafter, a method of manufacturing a liquid crystal display device according to an embodiment of the present invention having the above-described configuration will be described. At this time, the manufacturing method of the liquid crystal panel 105 including the array substrate 110, the color filter substrate 150, and the liquid crystal layer 180 is the same as a general method, and thus the method of manufacturing such a liquid crystal panel is omitted.

4A to 4D are cross-sectional views illustrating a first method of manufacturing a liquid crystal display device according to an embodiment of the present invention.

4A, an array substrate 110 and a color filter substrate 150 are manufactured by a general manufacturing method, and the two substrates 110 (110) and 110 150 and the liquid crystal layer 180 are interposed between the two substrates 110 and 150 and then a seal pattern (not shown) is formed along the edges of the two substrates 110 and 150, The panel 105 is completed.

Then, as shown in FIG. 4B, a first polarizing plate 185 having a general configuration is attached to the outer surface of the array substrate 110 of the liquid crystal panel 105 manufactured by a general method through laminating.

Next, in order to improve the hardness and the high abrasion resistance property, it is made of a UV curable acrylic material such as polyester, acrylate, urethane acrylate and epoxy acrylate and has high hardness and high abrasion resistance. A hard coated second polarizing plate 187 having a protective film is prepared which is coated with various organic or inorganic coating films including colloidal silica particles on the outer surface of the protective film. At this time, the second polarizing plate 187 is a polarizing plate subjected to low-temperature aging and having smoothness without bending the surface.

Then, as shown in FIG. 4C, the second polarizing plate 187 whose surface is smooth and hard-coated is placed on the stage 197 of the vacuum chamber 195 of the chemical vapor deposition apparatus, A first inorganic film 190a made of titanium oxide (TiO ₂ ) having a thickness of several nm to several hundreds of nm is formed on the outer surface of the vacuum chamber 195. Subsequently, the atmosphere inside the vacuum chamber 195 is changed to a gas atmosphere A second inorganic film 190b made of silicon oxide having a thickness of several nm to several hundreds nm is formed.

Thereafter, the thin film 190 having a multi-layer structure is formed by alternately stacking the first and second inorganic films 190a and 190b while changing the reaction gas in the vacuum chamber 195 as described above. At this time, the first and second inorganic films 190a and 190b are formed in an atmosphere of a temperature ranging from room temperature to 50 ° C since the protective film of the second polarizing plate 187 is made of an organic material.

In this case, it is preferable that the first inorganic film 190a made of titanium oxide is provided on the uppermost layer of the thin film 190 having the multilayer structure in order to improve the fingerprint resistance property. Therefore, the first and second inorganic films 190a, and 190b, and then finally forming a first inorganic film 190a so that the lowermost layer and the uppermost layer of the thin film having the multilayer structure made of the first inorganic film 190a of titanium oxide (190). In this case, the thin film 190 of the multilayer structure is formed of an odd number of layers, and if the fingerprint characteristic is not taken into account, the first and second inorganic films 190a and 190b are cross- Inorganic film 190b. In this case, the thin film 190 of the multilayer structure is formed of an even number of layers.

At this time, the first and second inorganic films 190a and 190b are formed to have a thickness ranging from several nm to several hundred nm by controlling the deposition time, the density of the reactive gas inside the vacuum chamber, the flow rate of the supplied gas, Can be adjusted.

Next, as shown in FIG. 4D, a protective film hard-coated on the outer surface of the color filter substrate 150 of the liquid crystal panel 105 to which the first polarizing plate 185 is attached, The second polarizing plate 187 on which the thin film 190 having a multilayer structure is formed is laminated and attached.

Thereafter, a backlight unit 189 is mounted on the outer surface of the first polarizer 185 to complete a liquid crystal display according to an embodiment of the present invention.

However, in the first manufacturing method as described above, in the step of forming the thin film 190 having a multi-layer structure on the outer surface of the second polarizer plate 187 hard-coated, the second polarizer plate 187, It is difficult to attach the second polarizing plate 187 on which the thin film 190 of the multilayer structure is formed to the liquid crystal panel 105. [

A second manufacturing method of a liquid crystal display device according to an embodiment of the present invention which solves such problems is proposed.

5A to 5E are cross-sectional views illustrating a second method of manufacturing a liquid crystal display device according to an embodiment of the present invention.

First, as shown in Fig. 5A, the liquid crystal panel 105 including the array substrate 110, the color filter substrate 150, and the liquid crystal layer 180 is formed by a general method.

Next, as shown in FIG. 5B, the first polarizing plate 185 is attached to the outer surface of the array substrate 110 of the liquid crystal panel 105 by laminating.

5C, a second polarizing plate 187, whose surface is smooth and has a hard coating on the outer surface of the color filter substrate 150 of the liquid crystal panel 105, (185) perpendicular to the polarization axis. Since the hard coating process of the second substrate has already been described in the first manufacturing method, a description thereof will be omitted.

5D, the liquid crystal panel 105 with the first and second polarizers 185 and 187 attached thereto is placed on the stage 197 in the vacuum chamber 195 of the chemical vapor deposition equipment The second polarizing plate 187 is exposed.

Thereafter, the second polarizing plate 187, more precisely, the second polarizing plate 187 is supplied by supplying a first reaction gas for deposition of titanium oxide (TiO ₂ ) in a state where the inside of the vacuum chamber 195 has a temperature of room temperature to 80 ° C. The first inorganic film 190a is formed on the outer surface of the hard-coated protective film of the polarizing plate 187. [

Next, the vacuum chamber 195 is brought into a second reaction gas atmosphere in a first reaction gas atmosphere, and then chemical vapor deposition is performed to deposit silicon oxide on the first inorganic film 190a to form a second inorganic film 190b ).

Thereafter, chemical vapor deposition is performed in a state in which the first and second reaction gases are sequentially changed in the same manner as described above, thereby forming a thin film having a multilayer structure in which the first and second inorganic films 190a and 190b are sequentially alternated 190 are formed.

At this time, in the case of the second manufacturing method of the present invention, the thin film 190 of the multilayer structure is formed in a state where the first and second polarizing plates 185 and 187 are attached to the liquid crystal panel 105, Since the first and second inorganic films 190a and 190b may be formed in the gate and data pad portions on the array substrate 110 exposed to the outside of the polarizing plate 185, exposure to the outside of the first polarizing plate 185 It is preferable that the chemical vapor deposition proceeds in a state where the gate and the data pad portion are covered with an evaporation preventing means such as an insulating tape or a coil.

This deposition preventing means is simply removed by the operator after the thin film 190 of the multi-layer structure is formed on the outer surface of the second polarizing plate 187.

Next, as shown in FIG. 5E, the backlight unit 189 is mounted on the outer surface of the first polarizer 185 in a state where the thin film 190 of the multilayer structure is formed and the deposition preventing means is removed Thereby completing the liquid crystal display device 101 according to the embodiment of the present invention.

The second manufacturing method of the liquid crystal display device according to the embodiment of the present invention described above is such that the second polarizing plate 187 is attached on the outer surface of the second polarizing plate 187 in a state where the second polarizing plate 187 is attached to the liquid crystal panel 105, The thin film 190 of the second polarizing plate 187 is formed to suppress the occurrence of the bending phenomenon of the second polarizing plate 187.

Further, since the bending phenomenon of the polarizing plate itself is suppressed, the temperature inside the vacuum chamber can be higher than that of the first manufacturing method during the deposition of the thin film 190, and the process can proceed at a higher speed due to the upward process temperature to be.

101: liquid crystal display device 110: array substrate
115: gate electrode 117: gate insulating film
120: semiconductor layer 120a: active layer
120b: ohmic contact layer 133: source electrode
136: drain electrode 140: protective layer
143: drain contact hole 145: pixel electrode
150: color filter substrate 153: black matrix
155: color filter layer 158: common electrode
180: liquid crystal layer 185: first polarizing plate
187: Second polarizing plate hard-coated
189: backlight unit 190: multilayer structure thin film
190a: first inorganic film 190b: second inorganic film
P: pixel region Tr: thin film transistor

Claims (17)

A liquid crystal panel including an array substrate, a color filter substrate, and a liquid crystal layer;
A first polarizer attached to the outer surface of the array substrate;
A backlight unit provided on an outer surface of the first polarizer;
A second polarizer attached to an outer surface of the color filter substrate and hard coated;
A thin film having a multilayer structure in which the first inorganic film and the second inorganic film having different refractive indexes provided on the outer surface of the second polarizing plate are alternately stacked
Wherein the thin film of the multi-layer structure displays monochromatic light by selectively reflecting external light when the backlight unit is turned off.
The method according to claim 1,
Wherein the thin film of the multilayer structure is a double layer or more, and the first inorganic film is preferentially formed on the second polarizing plate so that the first inorganic film located at the lowermost portion of the second polarizing plate is in contact with the second polarizing plate And the liquid crystal display device.
3. The method of claim 2,
Wherein the thin film of the multilayer structure comprises an odd numbered layer and the uppermost layer thereof comprises the first inorganic film.
4. The method according to any one of claims 1 to 3,
Wherein the first inorganic film is made of titanium oxide (TiO ₂ ), and the second inorganic film is made of silicon oxide (SiO ₂ ).
5. The method of claim 4,
Wherein the first inorganic film and the second inorganic film have thicknesses of several nm to several hundreds nm, respectively.
The method according to claim 1,
The second polarizer plate hard-coated includes a PVA layer having a polarizer, first and second TAC layers provided on both sides of the PVA layer, an adhesive layer provided on the outer surface of the first TAC layer, 2 TAC layer. The protective film is made of a UV curable acrylic material. Various organic or inorganic coating liquids including colloidal silica particles are coated on the outer surface of the protective film to improve curability. And a liquid crystal layer formed on the transparent substrate.
The method according to claim 6,
Wherein the UV curable acrylic material is one of a polyester, an acrylate, a urethane acrylate, and an epoxy acrylate.
Fabricating a liquid crystal panel including an array substrate, a color filter substrate, and a liquid crystal layer;
Attaching a first polarizer to the outer surface of the array substrate;
Attaching a hard-coated second polarizing plate to the outer surface of the color filter substrate;
The liquid crystal panel having the first and second polarizing plates attached thereto is placed on the stage in the vacuum chamber of the chemical vapor deposition apparatus so that the first polarizing plate and the upper surface of the stage are in contact with each other and the reaction gas atmosphere in the vacuum chamber is alternately changed, Forming a thin film having a multilayer structure by alternately laminating the first inorganic film and the second inorganic film,
Further comprising the step of attaching deposition preventing means to the gate pad portion and the data pad portion between the step of manufacturing the liquid crystal panel and the step of forming the thin film of the multi-layer structure.
9. The method of claim 8,
Mounting a backlight unit on the outside surface of the first polarizer of the liquid crystal panel having the thin film of the multi-layer structure formed thereon
And the second electrode is electrically connected to the second electrode.
9. The method of claim 8,
Wherein the deposition of the first and second inorganic films proceeds in a temperature atmosphere within the vacuum chamber within a range of room temperature to 80 캜.
11. The method of claim 10,
Wherein the thin film of the multilayer structure is a double layer or more, and the first inorganic film is preferentially formed on the second polarizer plate in preference to the second inorganic film.
12. The method of claim 11,
Wherein the thin film of the multilayer structure comprises an odd-numbered layer and the uppermost layer of the thin film comprises the first inorganic film.
13. The method of claim 12,
Wherein the first inorganic film is made of titanium oxide (TiO ₂ ), and the second inorganic film is made of silicon oxide (SiO ₂ ).
14. The method of claim 13,
Wherein the first inorganic film and the second inorganic film are formed so as to have a thickness of several nm to several hundreds nm, respectively.
The method according to claim 1,
Wherein the second polarizing plate has a smooth property without a bent portion on the surface thereof. The method according to claim 1,
The color filter substrate includes:
Includes red, green, and blue sub-pixels,
Wherein the same thin film of the multilayer structure is disposed in the red, green, and blue sub-pixels.
3. The method of claim 2,
The second polarizer plate hard-coated,
A PVA layer having a polarizer; first and second TAC layers provided on both sides of the PVA layer; an adhesive layer provided on the outer surface of the first TAC layer; The protective film is made of a UV curable acrylic material. The coating film may be coated with various organic or inorganic coating liquids including colloidal silica particles on the outer surface of the protective film to improve the curability of the protective film. ,
Wherein the first inorganic film is made of titanium oxide (TiO2), and the adhesion between the second polarizer and the thin film of the multi-layer structure is improved by contacting with the coating film.

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