KR20150001468A - In-plane switching mode liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device of an in-plane switching mode. The liquid crystal display device according to the present invention includes a liquid crystal panel which includes a first substrate and a second substrate which is located on the upper side of the first substrate, a polarization plate which is attached to the outside of the second substrate, a conductive tape which is attached to the second substrate which is exposed to the edge of the polarization plate, and a main support which has a square frame shape to surround the liquid crystal panel and includes an attachment groove to attach the conductive tape on the front side thereof. The conductive tape includes a guide part which corresponds to the second substrate which is exposed, and a body part which is extended from the guide part and is attached to the side of the main support along the attachment groove by being narrower than the guide unit by corresponding to the attachment groove. Thereby, a defective rate is minimized when the conductive tape is attached and static electricity inputted to the inside is discharged to the outside.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid crystal display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device of a transverse electric field mode capable of preventing the inflow of static electricity.

2. Description of the Related Art In recent years, flat panel display devices such as a plasma display panel (PDP), a liquid crystal display device (LCD), and an organic light emitting diode (OLED) display device have become thinner, lighter, And has been widely used.

Of these flat panel displays, a liquid crystal display device (LCD), which is advantageous for moving picture display and has a large contrast ratio and is actively used in TVs and monitors, exhibits optical anisotropy The principle of image realization by polarization is shown.

Such a liquid crystal display device has a liquid crystal panel in which a liquid crystal panel is interposed between two adjacent substrates through a liquid crystal layer as an essential component and changes the alignment direction of the liquid crystal molecules in an electric field in the liquid crystal panel to realize a difference in transmittance do.

The TN mode of the twisted nematic liquid crystal (TN LC), which has an advantage that the black and white display is easy, the response speed is high, and the driving voltage is low, can be classified according to the arrangement of the liquid crystal molecules Widely used.

However, in the liquid crystal display of the TN mode, since the liquid crystal molecules aligned horizontally with respect to the substrate are oriented substantially perpendicular to the substrate when a voltage is applied, there is a problem that the viewing angle is narrowed when the voltage is applied due to the refractive anisotropy of the liquid crystal molecules And liquid crystal display devices of various modes having a wide viewing angle characteristic have been researched and developed.

Of these, a liquid crystal display device of a transverse electric field mode (In-Plane Switching Mode) attracts attention and is being researched and developed.

Here, the liquid crystal display device of the transverse electric field mode is a device in which at least one pair of electrodes arranged in parallel in a pixel are formed and a liquid crystal molecule is arranged in a plane by forming a transverse electric field substantially parallel to the substrate.

1 is a view schematically showing a liquid crystal display device of a conventional transverse electric field mode.

As shown in Fig. 1, the liquid crystal display 1 includes first and second substrates 12 and 14 which are bonded to each other.

A liquid crystal layer 33 is interposed between the first and second substrates 12 and 14. The first and second substrates 12 and 14 are provided with a first And the second polarizing plates 19a and 19b, respectively.

A pixel electrode 15 and a common electrode 17 are formed on the first substrate 12. A liquid crystal layer 33 is formed by a horizontal electric field L formed between the pixel electrode 15 and the common electrode 17. [ Of the liquid crystal molecules are driven.

As described above, in the liquid crystal display device 1 of the transverse electric field mode driven by the horizontal electric field L, since no electrode is formed on the second substrate 14, unnecessary electric charges such as static electricity easily enter from the outside. At this time, when static electricity flows from the outside, the molecular alignment direction of the liquid crystal is affected and the normal operation is interrupted, so that the image quality deteriorates.

Accordingly, the liquid crystal display device 1 in the transverse electric field mode includes a conductive tape for preventing the introduction of static electricity.

This will be described with reference to FIG.

As shown in FIG. 2, the conductive tape 60 has a rectangular shape and is attached from the end of the second polarizer 19b to the support main 30 so that the second substrate 19, which is exposed at the edge of the second polarizer 19b, So that static electricity introduced from the outside can be discharged to the outside through the support main body 30.

At this time, the conductive tape 60 is attached by hand, and the gap ga between the second polarizer 19b and the support main 30 is narrow, and the conductive tape 60 is often attached in a distorted manner. So that the conductive tape 60 may be detached from the support main body 30.

As a result, the static electricity introduced from the outside is not discharged, the internal substrate is damaged, and the image quality is deteriorated.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a transverse electric field mode liquid crystal display device capable of discharging static electricity, .

According to an aspect of the present invention, there is provided a liquid crystal display device of a transverse electric field mode, comprising: a liquid crystal panel including a first substrate and a second substrate positioned above the first substrate; A polarizer attached to an outer surface of the second substrate; A conductive tape attached to the second substrate exposed at an edge of the polarizer; And a support main body having a rectangular frame shape to frame the liquid crystal panel and having an attachment groove for attaching the conductive tape, the conductive tape having a guide portion corresponding to the exposed second substrate, And a body portion extending from the guide portion and corresponding to the attachment groove, the body portion having a width smaller than that of the guide portion and attached to the side of the support main along the attachment groove.

The body of the conductive tape may further include a contact guide portion extending from the body portion and guiding the body portion to be closely attached to the side surface of the support main body, and the conductive tape has an 'H' shape.

In this case, the body portion of the conductive tape is formed to have a thickness and a width corresponding to the thickness and width of the attachment groove, and the contact guide portion of the conductive tape has a thickness corresponding to the side height of the support main body, And has a wide width so as to widen the surface area attached to the side surface of the support main body.

The liquid crystal display device may further include a top cover for covering a front edge of the liquid crystal panel and a side surface of the support main, wherein the top cover is connected to the conductive tape.

The second substrate may further include a conductive layer of a conductive material formed on the second substrate, wherein the conductive tape is attached to the conductive layer exposed to the edge of the polarizer.

According to the liquid crystal display device of the transverse electric field mode according to the present invention, the guide portion for attaching to the conductive tape is formed and the attachment groove of the support main is formed so that the conductive tape can be automatically aligned and attached, It is possible to eliminate the defective rate. As a result, the static electricity introduced from the outside is discharged to the outside, and the internal substrate is not damaged.

In addition, it is possible to realize a transverse electric field mode liquid crystal display device in which the conductive tape is more firmly attached to the support main body so that it is not distorted or torn due to an external impact and has reliability.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view schematically showing a liquid crystal display of a conventional transverse electric field mode. Fig.
Fig. 2 is a view showing a conductive tape attached to the liquid crystal display device of the transverse electric field mode of Fig. 1; Fig.
3 is a cross-sectional view of a part of a liquid crystal display according to a preferred embodiment of the present invention.
4 is a cross-sectional view of a portion of the liquid crystal panel of FIG. 3;
5 is a view showing a liquid crystal display device to which a conductive tape is attached according to a first preferred embodiment of the present invention.
Fig. 6 is a view showing the conductive tape of Fig. 5; Fig.
7 is a view showing a liquid crystal display device to which a conductive tape is attached according to a second preferred embodiment of the present invention.
8 is a view showing the conductive tape of Fig.
9 is a view showing a liquid crystal display device to which a conductive tape is attached according to a third preferred embodiment of the present invention.
10 is a view showing the conductive tape of Fig.

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

FIG. 3 is a cross-sectional view of a liquid crystal display according to a preferred embodiment of the present invention, and FIG. 4 is a cross-sectional view of a portion of the liquid crystal panel of FIG.

3 and 4, the liquid crystal display 100 includes a liquid crystal panel 110, a backlight unit 120, and a support main body (not shown) for modulating the liquid crystal panel 110 and the backlight unit 120 130, a top cover 140 and a cover bottom 150.

4, the liquid crystal panel 110 is a part that plays a key role in image display, and includes a liquid crystal layer 133, a first and a second liquid crystal layer 130, 2 substrates 112 and 114, respectively.

Here, under the assumption of the active matrix method, a plurality of gate lines (not shown) and data lines (not shown) cross each other on the inner surface of a first substrate 112, which is usually called a lower substrate or an array substrate, . At this time, a common wiring (not shown) parallel to the gate line (not shown) is formed in proximity to the gate line (not shown).

A thin film transistor (Tr) is formed in the switching region TrA, which is an intersection of a gate line (not shown) and a data line (not shown) of each sub-pixel SP, A transparent pixel electrode 115 and a common electrode 117 are formed in the display area AA.

At this time, the thin film transistor Tr includes a gate electrode 211, a gate insulating film 213, a semiconductor layer 215, and source and drain electrodes 217 and 219.

A protective layer 216 is formed on the entire surface of the first substrate 112 including the thin film transistor Tr and the pixel electrode 115 is electrically connected to the drain electrode 219 of the thin film transistor Tr do.

A common electrode 117 is formed on one side of the pixel electrode 115 of the display area AA at a predetermined interval so that the pixel electrode 115 and the common electrode 117 are alternately arranged, .

A color filter of red (R), green (G), and blue (B) colors is formed on the inner surface of a second substrate 114 called an upper substrate or a color substrate, And a black matrix 127 covering the non-display elements such as a gate line (not shown), a data line (not shown) and a thin film transistor Tr are formed.

An overcoat layer 124 is formed on the black matrix 127 and the color filter 128.

The liquid crystal panel 110 includes a pixel electrode 115 and a common electrode 117 formed on a first substrate 112 to generate a horizontal electric field between the two electrodes 115 and 117, The liquid crystal display 100 can be widened by arranging the first and second substrates 112 and 114 in parallel with the horizontal electric field parallel to the first and second substrates 112 and 114. [

The first and second polarizers 119a and 119b selectively transmit only specific light to the outer surfaces of the first and second substrates 112 and 114, respectively.

Although not shown, an upper and a lower alignment film for determining the initial alignment direction of the liquid crystal are interposed at the boundary between the first and second substrates 112 and 114 and the liquid crystal layer 133, and a liquid crystal layer A seal pattern is formed along the edges of the first substrate 112 and the second substrate 114 to prevent leakage of the first substrate 133.

A printed circuit board (not shown) is connected to at least one edge of the liquid crystal panel 110 through a connection member (not shown) such as a flexible circuit board or a tape carrier package (TCP) It can be properly brought into close contact with the side surface of the support main body 130 or the backside of the cover bottom 150 in the modularization process.

On the rear surface of the liquid crystal panel 110, a backlight unit 120 is provided to supply light so that the difference in transmittance can be displayed as an image.

The backlight unit 120 includes a light source arranged along the edge of the support main body 130, a reflection plate 125, a light guide plate 123 mounted on the reflection plate 125, and a plurality of optical sheets (121).

The LED 129a is used as a light source. The plurality of LEDs 129a are spaced apart from each other by a predetermined distance and mounted on a printed circuit board (PCB) 129b, thereby forming an LED assembly 129.

The LED assembly 129 is positioned such that the light is emitted from the plurality of LEDs 129a to face the light-incoming portion of the light guide plate 123 by adhesion or the like.

The light emitted from the plurality of LEDs 129a of the LED assembly 129 is incident into the light guide plate 123 through the light incident portion and is indirectly incident on the liquid crystal panel 110 using the refraction and reflection at the light guide plate 123. [ .

Here, a heat sink (not shown) may be provided on the rear surface of the LED assembly 129 to more efficiently discharge heat generated from each of the plurality of LEDs 129a. The heat sink (not shown) And may be a straight or printed circuit board 129b located on the back surface of the printed circuit board 129b and a vertically bent shape to surround one side of the plurality of LEDs 129a.

In addition, the printed circuit board 129b may correspond to a metal core printed circuit board having a heat dissipating function.

The reflection plate 125 reflects light passing through the back surface of the light guide plate 123 in a rectangular plate shape toward the liquid crystal panel 110, thereby improving the brightness of light.

The light guide plate 123 guides light emitted from each of the plurality of LEDs 129a to serve as a high-quality surface light source.

The light guide plate 123 may include a pattern of a specific pattern on the back surface to supply a uniform surface light source. The pattern may be formed in various shapes such as an elliptical pattern, a polygon pattern, a hologram pattern, and the like in order to guide light incident into the light guide plate 123, Is formed on the lower surface of the base plate 123 by a printing method or an injection method.

The light guide plate 123 may be made of polymethyl methacrylate (PMMA) or polymethacrylic styrene (MS) resin in which polymethyl methacrylate (PMMA) and polystyrene (PS) are mixed. have.

The plurality of optical sheets 121 interposed on the light guide plate 123 diffuse or condense the light converted into the surface light source by the light guide plate 123 so that a more uniform surface light source is incident on the liquid crystal panel 110 .

The plurality of optical sheets 121 may include a diffusion sheet for diffusing light, a prism sheet for condensing light, and a protective sheet for protecting the prism sheet and serving as an auxiliary for diffusing light.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the top cover 140, the support main body 130, and the cover bottom 150.

The support main 130 includes a first vertical portion 132, a first horizontal portion 134 connected to the first vertical portion 132 in a direction perpendicular to the first vertical portion 132, And a second horizontal portion 137 protruding from the inside of the vertical portion 136 and the second vertical portion 136, and has a rectangular frame shape.

The first vertical part 132, the first horizontal part 134 and the second vertical part 136 have side parts 154 of the cover bottom 150 in which a plurality of LEDs 129a are arranged along the inner side, And serves to provide a placement area 138 to be placed. The printed circuit board 129b attached thereto together with the side portion 154 of the cover bottom 150 with the side portion 154 of the cover bottom 150 being surrounded by the first vertical portion 132 is positioned in the arrangement region 138).

The second vertical portion 136 and the second horizontal portion 137 guide light emitted from each of the plurality of LEDs 129a toward the light guide plate 123 and light emitted from each of the plurality of LEDs 129a is displayed And serves to prevent a light leakage phenomenon that is emitted to a non-display area other than the area.

The second horizontal part 137 serves to separate the liquid crystal panel 110 and the backlight unit 120 while supporting the rear edge of the liquid crystal panel 110.

On the other hand, in the first horizontal portion 134, an attachment groove (135 in Figs. 5, 7, and 9) for attaching a conductive tape (160, 260, 360 in Figs. 5, Respectively.

The top cover 140 includes a first rim portion 142 that rims the side of the support main 130 and a second rim portion 144 that rims the front edge of the liquid crystal panel 110.

The top cover 140 has a rectangular frame shape bent in a cross section so as to cover a front edge of the liquid crystal panel 110 and a side portion of the support main 130, So that an image can be displayed.

Also, the top cover 140 is preferably made of a metal material and serves as a ground.

The cover bottom 150 which is the base of the entire structure of the liquid crystal display device 100 with the backlight unit 120 mounted thereon has a bottom plate 152 having a rectangular plate shape, And a side portion 154 along which the LED assembly 129 is disposed along the inner side surface. At this time, the side portion 154 may further include a horizontal portion formed to be perpendicularly connected thereto, and the horizontal portion may have a length corresponding to the placement region 138 of the support main 130.

The liquid crystal panel 110 and the backlight unit 120 are covered with the top cover 140 covering the top edge of the liquid crystal panel 110 in a state where the liquid crystal panel 110 and the backlight unit 120 are surrounded by the support main body 130, And the cover bottoms 150 covering the back surface are coupled to each other at the front and rear sides to be integrated through the support main body 130 to be modularized.

The light emitted from each of the plurality of LEDs 129a of the backlight unit 120 is incident on the light entrance portion of the light guide plate 123 and then refracted toward the liquid crystal panel 110 inside the light guide plate 123, 125 and the liquid crystal panel 110 while being passed through the plurality of optical sheets 121. In this case,

5, FIG. 7 and FIG. 9) 160 are attached to the outer surface of the second substrate 114, which will be described in detail with reference to FIGS. 5 to 10.

At this time, the conductive tape (160, 260, 360 in FIGS. 5, 7 and 9) is connected to the top cover 140 through the support main 130, and the top cover 140 can serve as a ground. The static electricity introduced into the second substrate 114 is discharged to the outside by being connected to the top cover 140 through the conductive tape (160, 260, 360 of FIGS. 5, 7 and 9).

A conductive layer (not shown), which is a transparent conductive material, may be further formed on the second substrate 114, that is, between the second polarizer 119b and the second substrate 114. Here, the conductive layer (not shown) is made of indium-tin-oxide (ITO) or indium-zinc-oxide (IZO). Accordingly, the conductive tape (160, 260, 360 in FIGS. 5, 7, and 9) can be attached to the conductive layer (not shown) exposed to the edge of the second polarizing plate 119b. When such a structure is formed, a medium (a conductive layer and a conductive tape) capable of preventing static electricity is formed over the entire surface of the second substrate 114, so that static electricity can be removed more quickly by maximizing the area for preventing static electricity.

Here, the top cover 140 may be referred to as a case top or a top case, and the support main 130 may be referred to as a guide panel or a main support or a mold frame, and the cover bottom 150 may be referred to as a bottom cover.

FIG. 5 is a view showing a liquid crystal display with a conductive tape according to a first preferred embodiment of the present invention, and FIG. 6 is a view showing the conductive tape of FIG. 5, and FIG.

5, the conductive tape 160 according to the present invention is attached to the second substrate 114 exposed to the edge of the second polarizer 119b. The conductive tape 160 extends from the second substrate 114, (130 in FIG. 3) along the outer surface of the first vertical portion 132 and the first horizontal portion 134 of the first vertical portion (130 in FIG. 3). In this case, as described above, a conductive layer (not shown) may be formed on the second substrate 114. In this case, the conductive tape 160 may be a conductive layer exposed at the edge of the second polarizer 119b Not shown).

6, the conductive tape 160 guides the gap GA between the second polarizer 119b and the support main (130 in FIG. 3), and the conductive tape 160 is bonded to the second substrate 114 And a body portion 164 extending from the guide portion 162 and having a rectangular shape and a width smaller than that of the guide portion 162. The guide portion 162 may have a T shape.

Here, the second substrate 114 and the seating grooves 135 formed in the first horizontal portion 134 of the support main (130 in FIG. 3) are located on the same line, and the second substrate 114 and the support main There is a step between the first horizontal portions 134 of the first horizontal portion 130. [ Through such step difference, the guide portion 162 is attached to the gap GA between the second polarizing plate 119b and the first horizontal portion 134 of the support main (130 in FIG. 3), that is, to the exposed second substrate 114 .

That is, the guide portion 162 serves to guide the conductive tape 160 to be normally attached to the gap GA between the second polarizer 119b and the support main 30.

The body portion 164 has a width equal to or less than the width of the attachment groove 135 so as to be attached to the attachment groove 135 in the attachment groove 135 formed in the first horizontal portion 134 of the support main body 130 .

The conductive tape 160 having such a structure may be composed of a first layer formed of a conductive material such as aluminum and a second layer formed of an adhesive material on one surface thereof. Alternatively, the conductive tape 160 may be in the form of a film in which the first layer and the second layer are mixed.

FIG. 7 is a view showing a liquid crystal display with a conductive tape according to a second preferred embodiment of the present invention, and FIG. 8 is a view showing the conductive tape of FIG. 7, and FIG. 3 is referred to. Here, the structure of the conductive tape except for the structure of the second guide portion is the same as that of FIG. 5, and thus a detailed description of the same structure will be omitted.

7, the conductive tape 260 according to the present invention is attached to the second substrate 114 exposed to the edge of the second polarizing plate 119b. The conductive tape 260 extends from the second substrate 114, (130 in FIG. 3) along the outer surface of the first vertical portion 132 and the first horizontal portion 134 of the first vertical portion (130 in FIG. 3).

8, the conductive tape 260 guides the gap GA between the second polarizing plate 119b and the support main (130 in FIG. 3), and the conductive tape 260 is guided to the second substrate 114 A body portion 264 extending from the first guide portion 262 and having a smaller width than the first guide portion 262 and extending in a rectangular shape and a body portion 264 extending from the first guide portion 262, And a second guide portion 266 having the same shape as that of the first guide portion 262, so that it can have an 'H' shape.

Here, the body portion 264 is formed to have a width equal to or smaller than that of the attachment groove 135 so as to be attached to the attachment groove 135 of the support main body (130 in FIG. 3).

The second guide portion 266 is a portion which is attached to the outer surface of the first vertical portion 132 of the support main body 130 130, respectively.

Meanwhile, although the second guide part 266 is shown in the same shape as the first guide part 262, the second guide part 266 is not limited thereto and may have various shapes.

This will be described with reference to Figs. 9 and 10. Fig.

FIG. 9 is a view showing a liquid crystal display with a conductive tape according to a third preferred embodiment of the present invention, and FIG. 10 is a view showing the conductive tape of FIG. 9, with reference to FIGS.

9, the conductive tape 360 according to the present invention is attached to the second substrate 114 exposed at the edge of the second polarizing plate 119b. The conductive tape 360 extends from the second substrate 114, (130 in FIG. 3) along the outer surface of the first vertical portion 132 and the first horizontal portion 134 of the first vertical portion (130 in FIG. 3).

10, the conductive tape 360 includes a first guide portion 362, a rectangular-shaped body portion 364 extending from the first guide portion 362, And a second guide portion 366 extending from the first guide portion 364.

Here, the first guide portion 362 is attached to the second substrate 114 while guiding the second polarizer 119b and the support main (130 in FIG. 3). At this time, the first length D1 of the first guide part 362 corresponds to the width of the second substrate 114 exposed through the edge of the second polarizing plate 119b.

The body portion 364 has a second width W2 that is smaller than the first guide portion 362 having the first width W1 and has a second length D2. 2 length D2 may be formed to correspond to the width and length of the seating groove 135 formed in the first horizontal portion 134 of the support main (130 in Fig. 3), or may be formed to have a width and length smaller than this have.

The second guide portion 366 has the same width W1 as the first guide portion 362 and has a third length D3. The third length D3 corresponds to the width of the support main portion 130 1 vertical portion 132, or may be formed to have a length smaller than the height.

The second guide portion 366 serves to securely attach the conductive tape 360 according to the present invention to the support main body 130 (FIG. 3) by widening the surface area attached to the support main body 130 do. That is, by widening the attachment surface, it is possible to prevent the conductive tape 360, which may be generated in the external impact or modularization process, from being twisted or separated.

Although both ends of the first and second guide portions 362 and 366 are illustrated as being rounded, it is not limited thereto, and both end edges may be rounded, or both ends may be formed in various shapes Lt; / RTI >

The first guide portion 362 and the second guide portion 366 may be formed to have different widths but be formed to be larger than the second width W2 of the body portion 364.

As described above, by forming the guide portion in the conductive tape and forming the attachment groove in the support main, it is possible to facilitate the work of manually attaching the conductive tape and to minimize the defective rate. As a result, the static electricity introduced from the outside can be more easily discharged to the outside.

The embodiments of the present invention as described above are merely illustrative, and those skilled in the art can make modifications without departing from the gist of the present invention. Accordingly, the protection scope of the present invention includes modifications of the present invention within the scope of the appended claims and equivalents thereof.

110: liquid crystal panel 112: first substrate
114: second substrate 119a: first polarizer
119b: second polarizing plate 120: backlight unit
130: Support main 132: First vertical part
134: first horizontal part 135: attachment groove
136: second vertical part 137: second horizontal part
160, 260, 360: Conductive tape

Claims (5)

A liquid crystal panel comprising a first substrate and a second substrate positioned above the first substrate;
A polarizer attached to an outer surface of the second substrate;
A conductive tape attached to the second substrate exposed at an edge of the polarizer; And
And a support main body having a rectangular frame shape to frame the liquid crystal panel and having an attachment groove for attaching the conductive tape on the whole surface,
The conductive tape
And a body portion extending from the guide portion and corresponding to the attachment groove and formed to have a width smaller than that of the guide portion to be attached to the side surface of the support main along the attachment groove And the liquid crystal display device of the lateral field mode.
The method according to claim 1,
The body portion of the conductive tape
And a tight guide portion extending from the body portion and guiding to adhere to and adhere to a side surface of the support main body
Wherein the conductive tape has an " H " shape.
3. The method of claim 2,
The body portion of the conductive tape
A thickness and a width corresponding to the thickness and width of the attachment groove,
The contact guide portion of the conductive tape
Wherein the support main body is formed to have a thickness corresponding to a lateral height of the support main body and a wider width than the main body part to widen a surface area attached to a side surface of the support main body.
The method according to claim 1,
And a top cover which is made of a metallic material and which covers a front edge of the liquid crystal panel and a side surface of the support main,
And the top cover is connected to the conductive tape.
The method according to claim 1,
And a conductive layer of a conductive material formed on the second substrate,
Wherein the conductive tape is attached to the conductive layer exposed to the edge of the polarizing plate.

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