TWI457643B - In-plane switching mode liquid crystal display device - Google Patents

Description

Plane switching liquid crystal display device

The present invention relates to a planar switching liquid crystal display device having a pixel electrode and a common electrode formed on the same substrate, and more particularly to a planar switching liquid crystal display device having a liquid crystal polarization which is inhibited by external static electricity. The ability to improve the image display quality by forming an induced electric field between a first conductive layer and a second conductive layer, and a common voltage is applied to the induced electric field through an electrical connection.

Recently, planar switching liquid crystal display devices (IPS LCDs) have been extensively studied. The planar switching liquid crystal display device includes two electrodes formed on the same substrate such that a voltage is applied between the electrodes to generate a horizontal electric field or a boundary electric field associated with the substrate.

Thereafter, a conventional planar switching liquid crystal display device will be described with the accompanying drawings.

The first figure is a cross-sectional view of a conventional planar switched display.

The conventional planar switching liquid crystal display device shown in the first figure includes a pixel array 22 having a pixel electrode and a common electrode, and is formed on one side of a lower substrate 20, when static electricity is from one without an electrode. When the upper substrate is produced, a liquid crystal polarized light may be generated in a liquid crystal layer (LC, 40) due to static electricity, thereby deteriorating the display image quality. In order to avoid the occurrence of the liquid crystal polarized light, a method of electrostatically grounding introduced from the outside via an SUS frame 30 by applying a transparent conductive layer 16 to the rear end of the upper substrate 10 is used. On the surface, a copper strip 32 is attached to the SUS frame 30, and the SUS frame 30 surrounds a molded frame 29.

As described above, the transparent conductive layer 16 is in contact with the SUS frame 30 and operates as the same ground terminal to prevent the upper substrate 10, which is a dielectric material, from being charged by the introduction of external static electricity, thereby preventing the static electricity from being electrostatically charged. This electric field is caused to invade a liquid crystal 40.

However, when the SUS frame 30 is removed to form a compact, lightweight, and compact device, such as a mobile or portable device, the transparent conductive layer 16 formed on the rear surface of the upper substrate 10 must be floated. It makes it impossible to shield the static electricity perfectly.

The present invention has been made in view of the problems associated with the prior art, and an object of the present invention is to provide a planar switching liquid crystal display device having the ability to suppress polarization of a liquid crystal which is caused by external static electricity to improve display image quality.

In order to achieve the above object, in accordance with one aspect of the present invention, a planar switching liquid crystal display device is provided, comprising: a first substrate having a first conductive layer and a second conductive layer, the first conductive layer and the first a second conductive layer is formed on each side of the first substrate; a second substrate having a transparent pixel electrode and a transparent common electrode formed on one side of the second substrate facing the second conductive layer; The connection portion is configured to electrically connect the second conductive layer to the transparent common electrode, wherein a common voltage applied to the transparent common electrode is applied to the second conductive layer through the electrical connection portion.

According to another aspect of the present invention, a planar switching liquid crystal display device is provided, comprising: a first substrate having a first conductive layer, a second conductive layer, and an insulating layer, and the first conductive layer and a second substrate having a transparent pixel electrode and a transparent common electrode formed on one surface of the second substrate facing the second conductive layer; an electrical connection portion The second conductive layer is electrically connected to the transparent common electrode, wherein a common voltage applied to the transparent common electrode is applied to the second conductive layer through the electrical connection portion.

The insulating layer may be an over coater layer to improve planarization.

The color filter layer may be formed on the first substrate, including a plurality of color filter patterns, and the second conductive layer may be patterned by a conductive light shielding layer formed on the color filter patterns. between.

The first conductive layer may be patterned to form a shape corresponding to one of the light shielding layers.

The color filter layer may be further formed on the first substrate, the color filter layer includes a plurality of color filter patterns and a conductive light shielding layer formed between the color filter patterns, and Wherein the second conductive layer is patterned to form a shape corresponding to one of the conductive light shielding layers.

The first conductive layer may be replaced by a conductive polarizer.

More preferably, the planar switching liquid crystal display device further includes a conductive polarizing plate on the first conductive layer.

The first conductive layer may be formed of a metallic material or a conductive resin.

The first conductive layer may be formed entirely of a transparent metallic material or a transparent conductive resin.

More preferably, the planar switching liquid crystal display device further includes a color filter layer formed on the first substrate, the color filter layer including a plurality of color filter patterns and a light shielding layer including color filters Light sheet pattern.

More preferably, the planar switching liquid crystal display device further includes a coating layer between the first conductive layer and the second conductive layer.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail by the accompanying drawings. However, the invention may be embodied in many different forms and should not be construed as being limited by the specific embodiments. Rather, the specific embodiments are fully disclosed, and the scope of the invention is fully disclosed.

2A is a cross-sectional view of a planar switching liquid crystal display device according to an embodiment of the present invention, and FIG. 2B is a plan switching liquid crystal display device including a transfer dot portion of the second A diagram. Floor plan.

Hereinafter, the planar switching liquid crystal display device according to an embodiment of the present invention will be described with reference to FIGS. 2A and 2B.

The planar switching liquid crystal display device according to an embodiment of the present invention includes a first substrate 210, a plurality of color filter layers 212R, 212G, and 212B, a conductive light shielding layer 214, and a conductive layer 216. A second substrate 220, a pixel array 222, includes a transparent pixel electrode and a transparent common electrode, and an electrical connection portion 224.

The conductive layer 216 is formed on one surface of the first substrate 210. When the conductive layer 216 is formed on all surfaces of the first substrate 210, the conductive layer 216 may be oxidized by a transparent conductive resin or a transparent conductive metal material such as indium tin having relatively good light transmittance. Formed by indium tin oxide (ITO) or indium zinc oxide (IZO). In addition, when the conductive layer 216 is patterned on one surface of the first substrate 210 to match the conductive light shielding layer 214, the conductive layer 216 may be formed of various forms of metal materials and conductive resins, including the A transparent conductive resin and the transparent conductive metal material. Here, the transparent conductive resin may be formed of a mixture of indium tin oxide powder and acrolein (ITO powder plus acrolein), an epoxide, or the like.

An upper conductive polarizer 219 may be formed on the conductive layer 216. In addition to this, the upper conductive polarizing plate 219 may be formed on the first substrate 210 without the conductive layer 216.

The conductive light-shielding layer, in other words, a plurality of black matrices, is used to prevent light leakage and may contain chromium (Cr). The conductive light shielding layer 214 is formed on the other surface of the first substrate 210 at a predetermined plurality of intervals, and is generally used to distinguish the color filter layers 212R, 212G, and 212B of red, green, and blue.

The color filter layers 212R, 212G, and 212B are generally formed of a photosensitive organic material and are alternately arranged between the conductive light shielding layers 214 in the order of red, green, and blue color filter patterns. Meanwhile, a coating layer 218 may be selectively formed under the color filter layers 212R, 212G, and 212B to remove a step produced by the color filter layers 212R, 212G, and 212B. Step difference and improve flatness.

A pixel array 222, including a transparent pixel electrode and a transparent common electrode, is formed on one surface of the second substrate 220. Although not specifically shown, each pixel region is defined by a plurality of gate lines and a plurality of data lines intersecting each other. A plurality of switching devices are disposed at intersections of the gate lines and the data lines. The pixel electrode and the transparent common electrode are separated from each other by an insulating layer interposed therebetween to overlap a predetermined region, and are disposed in the pixel region for applying a voltage to the liquid crystal layer 230, thereby Adjust the light transmittance.

The electrical connection portion 224 is electrically connected to the conductive light shielding layer 214 and the transparent common electrode of the pixel array 222, and includes a transfer dot portion containing a metal having high conductivity, preferably silver. (Ag), or a conductive sealing member containing gold (Au).

When a normal voltage is applied to the transparent common electrode of the pixel array 222, the normal voltage is applied to the conductive light shielding layer 214 through the electrical connection portion 224 to be in the conductive light shielding layer 214 and the conductive layer 216. An induced electric field is formed therebetween to prevent external static electricity from affecting the liquid crystal layer 230. That is, as indicated by the two-way arrow in the vertical direction of the first substrate 210 in FIG. 2A, the induced electric field is formed between the conductive layer 216 and the conductive light shielding layer 214 to avoid the liquid crystal layer 230. A liquid crystal polarized light is generated.

In the second A diagram, the component symbol 225 is designated as a sealing member, the component symbol 226 is designated as a lower polarizing plate, the component symbol 228 is designated as a backlight unit, and the component symbol 229 is designated as a molded frame.

When the electrical connection portion 224 is a transfer dot portion, as shown in the second B, the transfer dot portion 224 may be formed at the periphery of the sealing member 225 surrounding the pixel region.

Here, when the conductive layer 216 is replaced only by the upper conductive polarizing plate 219, the induced electric field is formed between the upper conductive polarizing plate 219 and the conductive light shielding layer 214.

The third figure is a cross-sectional view of a planar switching liquid crystal display device according to another embodiment of the present invention.

Referring to the third embodiment, the planar switching liquid crystal display device according to an embodiment of the present invention includes a first substrate 310, a plurality of color filter layers 312R, 312G, and 312B, and a light shielding layer 314. A conductive layer 316, a second conductive layer 317, a second substrate 320, including a transparent pixel electrode and a transparent common electrode pixel array 322, and an electrical connection portion 332.

The first conductive layer 316 is formed on one surface of the first substrate 310. When the first conductive layer 316 is formed on one surface of the first substrate 310, the first conductive layer 316 may be made of a transparent conductive resin or a transparent conductive metal material, for example, preferably having light penetration. The indium tin oxide (ITO) or indium zinc oxide (IZO) is formed. In addition, when the first conductive layer 316 is patterned on one surface of the first substrate 310 to match the light shielding layer 314, the first conductive layer 316 may be formed of various types of metal materials and conductive resins. The transparent conductive resin and the transparent conductive metal material are included. Here, the transparent conductive resin may be formed of a mixture of indium tin oxide powder and acrolein (ITO powder plus acrolein), an epoxide, or the like.

An upper conductive polarizing plate 319 may be formed on the first conductive layer 316. In another aspect, the upper conductive polarizer 319 may be formed on the first substrate 310 without the first conductive layer 316.

The light shielding layer 314 is for preventing light leakage and may include a resin. The light shielding layer 314 formed of a resin can be clearly displayed, even in an outdoor environment, because the light shielding layer 314 does not reflect incident light from the outside. In addition, in performing ultra-high brightness, a reddish color problem caused by the internal reflection can be immediately solved, and the design of the liquid crystal display device and a manufacturing process thereof can be simplified.

The light shielding layers 314 are formed on the other surface of the first substrate 310 at a predetermined plurality of intervals, generally for distinguishing the red, green, and blue color filter layers 312R, 312G, and 312B.

The color filter layers 312R, 312G, and 312B are generally formed of a photosensitive organic material, and are alternately arranged between the light shielding layers 314 in a red, green, and blue color filter pattern.

The second conductive layer 317 is substantially patterned under the light shielding layer 314 to form a shape corresponding to one of the light shielding layers 314.

Meanwhile, a coating layer 318 may be selectively formed under the color filter layers 312R, 312G, and 312B to remove the step difference generated by the color filter layers 312R, 312G, and 312B. And improve flatness. In this example, the second conductive layer 317 may be formed under the coating layer 318. Here, the coating layer 318 may include a thermosetting material.

The second conductive layer 317 may be formed between the second substrate 320 and the light shielding layer 314. In this example, the second conductive layer 317 is patterned to form one of the corresponding light shielding layers 314 or is formed entirely on the second substrate 320.

The pixel array 322 includes a transparent pixel electrode and a transparent common electrode formed on a surface of the second substrate 320. At the same time, each pixel region is defined by a plurality of gate lines and a plurality of data lines forming an intersection with each other. A plurality of switching devices are disposed at intersections of the gate lines and the data lines (not shown). The pixel electrode and the transparent common electrode are separated from each other by an insulating layer (not shown) interposed therebetween to overlap a predetermined region, and are disposed in the pixel region for applying a voltage to a liquid crystal Layer 330, thereby adjusting the light transmittance.

The electrical connection portion 332 is electrically connected to the second conductive layer 317 and the transparent common electrode of the pixel array 322, and includes a transfer dot portion including a metal having high conductivity, preferably Silver (Ag), or a conductive sealing member containing gold (Au).

When a normal voltage is applied to the transparent common electrode of the pixel array 322, the normal voltage is applied to the second conductive layer 317 through the electrical connection portion 332 to be in the second conductive layer 317 and the first An induced electric field is formed between the conductive layers 316 to prevent external static electricity from affecting the liquid crystal layer 330. That is, as indicated by the arrow, the induced electric field is formed between the first conductive layer 316 and the second conductive layer 317 to avoid a liquid crystal polarization in the liquid crystal layer 330. Meanwhile, as shown in the third figure, the planar switching liquid crystal display device further includes a sealing member 325, a lower polarizing plate 326, a backlight unit 328, and a molding frame 329.

Here, when the first conductive layer 316 is replaced by the upper conductive polarizing plate 319, an induced electric field is formed between the upper conductive polarizing plate 319 and the second conductive layer 317.

Meanwhile, since the basic components of the liquid crystal display device are not specifically described, such as a thin film transistor, a substrate, a liquid crystal layer, and the like, and are the same as the conventional liquid crystal display device, the detailed description will be Omitted.

The fourth figure is a cross-sectional view of a planar switching liquid crystal display device according to still another exemplary embodiment of the present invention.

Referring to the fourth figure, the planar switching liquid crystal display device will be described in accordance with the present exemplary embodiment.

The planar switching liquid crystal display device according to the exemplary embodiment includes a first substrate 410, a plurality of color filter layers 412R, 412G, and 412B, a conductive light shielding layer 414, a conductive layer 416, and a first The coating layer 417, a second substrate 420, includes a transparent pixel electrode and a transparent common electrode pixel array 422, and an electrical connection portion 424. The conductive layer 416 is formed between the first substrate 410 and a first coating layer 417. When the conductive layer 416 is formed on the entire surface of the lower surface of the first substrate 410, the conductive layer 416 may be composed of a transparent conductive resin or a transparent conductive metal material, such as having relatively excellent light penetration. Indium tin oxide (ITO) or indium zinc oxide (IZO). Further, when the conductive layer 416 is formed under the first substrate 410 and is patterned to form the conductive light shielding layer 414, the conductive layer 416 may be formed of various metal materials and conductive resins, including the A transparent conductive resin and the transparent conductive metal material.

The transparent conductive resin may be composed of a mixture of indium tin oxide powder and acrolein (ITO powder plus acrolein) or epoxide. Further, an upper conductive polarizing plate 419 may be formed on the first substrate 410.

The conductive light shielding layer 414 is used to prevent light leakage and may include chromium. The conductive light shielding layers 414 are formed under the first coating layer 417 and separated from each other by a predetermined distance. In general, the conductive light shielding layer 414 is used to distinguish the red, green, and blue color filter layers 412R, 412G, and 412B.

The filter layers 412R, 412G, and 412B are formed of a photosensitive organic material and are alternately arranged between the individual conductive light shielding layers 414 in the order of red, green, and blue color filter patterns. Meanwhile, the second coating layers 418 may be selectively formed under the color filter layers 412R, 412G, and 412B to remove the color filter layers 412R, 412G, and 412B. First order difference and improved flatness.

The pixel array 422 includes a pixel electrode and a transparent common electrode formed on a surface of the second substrate 420. Meanwhile, although not shown, the individual pixel regions are defined by a plurality of gate lines and a plurality of data lines formed in a direction crossing each other, and a plurality of switching devices are formed on the gate lines and the data. At the intersection of the lines. Further, the pixel electrode and the transparent common electrode are spaced apart from each other, and an insulating layer is interposed between each other to overlap a predetermined region, and is formed in the pixel region for applying a voltage to the liquid crystal layer 430. , thereby adjusting the light transmittance. The electrical connection portion 424 is electrically connected to the conductive light shielding layer 414 and the transparent common electrode of the pixel array 422. The electrical connection portion 424 includes a transfer dot portion comprising a metal having high conductivity, preferably silver (Ag), or a conductive sealing member comprising gold (Au).

When a normal voltage is applied to the transparent common electrode of the pixel array 422, the normal voltage is applied to the conductive light shielding layer 414 through the electrical connection portion 424 to be in the conductive light shielding layer 414 and the conductive layer 416. An induced electric field is formed therebetween to prevent external static electricity from affecting the liquid crystal layer 430. That is, as indicated by the arrow appearing in the first coating layer 417, the induced electric field is formed between the conductive layer 416 and the conductive light shielding layer 414, thereby avoiding liquid crystal polarization occurring in the liquid crystal layer. . In the fourth figure, reference numerals 425, 426, 428, and 429 denote a sealing member, a lower polarizing plate, a backlight unit, and a molded frame, respectively.

Figure 5 is a cross-sectional view of a planar switching liquid crystal display device in accordance with still another exemplary embodiment of the present invention.

Referring to FIG. 5, the planar switching liquid crystal display device according to an exemplary embodiment of the present invention includes a first substrate 510, a plurality of color filter layers 512R, 512G, and 512B, and a light shielding layer 514. A conductive layer 516a, a second conductive layer 516b, a second substrate 520, a transparent pixel electrode and a transparent common electrode pixel array 522, and an electrical connection portion 532.

The first conductive layer 516a is formed under the first substrate 510. When the conductive layer 516a is formed on all surfaces of the first substrate 510, the first conductive layer 516a may be composed of a transparent conductive resin or a transparent conductive metal material, such as having a relatively excellent light transmittance. It is formed by indium tin oxide (ITO) or indium zinc oxide (IZO). Further, when the first conductive layer 516a is formed under the first substrate 510 and patterned with the light shielding layer 514, the first conductive layer 516a may be composed of various types of metal materials and conductive resins, including The transparent conductive resin and the transparent conductive metal material are formed. The transparent conductive resin may be composed of a mixture of indium tin oxide powder and acrolein (ITO powder plus acrolein) or epoxide. Further, a conductive polarizing plate 519 may be formed on the first substrate 510.

The light shielding layers 514 are formed under the first conductive layer 516a to separate each other by a predetermined distance. Generally, the light shielding layer 514 is used to distinguish the red, green, and blue color filter layers 512R, 512G, and 512B.

The filter layers 512R, 512G, and 512B are formed of a photosensitive organic material and are alternately arranged between the individual light shielding layers 514 in the order of red, green, and blue color filter patterns. At the same time, the first coating layer 517 may be selectively formed between the first conductive layer 516a, the color filter layers 512R, 512G, and 512B and the light shielding layer 514.

The second conductive layer 516b is substantially patterned under the light shielding layer 514 to form a shape corresponding to the light shielding layer 514.

Meanwhile, a coating layer 518 may be selectively formed under the color filter layers 512R, 512G, and 512B to remove the first-order difference generated by the color filter layers 512R, 512G, and 512B. And improve flatness. The second conductive layer 516b may be formed under the coating layer 518.

The second conductive layer 516b may be formed between the first coating layer 517 and the light shielding layer 514. The second conductive layer 516b may be formed on all of a surface of the upper portion of the first coating layer 517.

The pixel array 522 includes a transparent pixel electrode and a transparent common electrode formed on one surface of the second substrate 520. Meanwhile, although not shown, the individual pixel regions are defined by a plurality of gate lines and a plurality of data lines formed in a direction crossing each other, and a plurality of switching devices are formed on the gate lines and the data. At the intersection of the lines. Further, the pixel electrode and the transparent common electrode are separated from each other by an insulating layer interposed therebetween to overlap a predetermined region, and are formed in the pixel region for applying an electrode to a liquid crystal layer 530. , thereby adjusting the light transmittance.

The electrical connection portion 532 is electrically connected to the second conductive layer 516b and the transparent common electrode of the pixel array 522. The electrical connection portion 532 includes a transfer dot portion comprising a metal having high conductivity, preferably silver (Ag), or a conductive sealing member containing gold (Au).

When a normal voltage is applied to the transparent common electrode of the pixel array 522, the normal voltage is transmitted through the electrical connection portion 532 to the second conductive layer 516b to be in the first conductive layer 516a and the second conductive An induced electric field is formed between the layers 516b to prevent external static electricity from affecting the liquid crystal layer 530. That is, as indicated by the arrow therein, the induced electric field is formed between the first conductive layer 516a and the second conductive layer 516b, thereby preventing liquid crystal polarization occurring in the liquid crystal layer.

Meanwhile, as shown in FIG. 5, the planar switching liquid crystal display device further includes a sealing member 525, a lower polarizing plate 526, a backlight unit 528, and a molded frame 529.

In addition, although the exemplary embodiment of the planar switching liquid crystal display device of the present invention has been described in detail, it is not limited thereto, and the present invention may be applied to all liquid crystal display devices using optical anisotropy and polarization characteristics of liquid crystal. .

As can be seen from the above, a common potential is applied to a conductive light shielding layer formed on the other side of the first substrate through an electrical connection portion to form a surface formed on one side of the first substrate. The induced electric field associated with the conductive layer, thereby suppressing one of the liquid crystal polarization caused by external static electricity to improve the display image quality.

Further, according to the present invention, a common potential is applied to one of the second conductive layers formed on the other surface of the first substrate through an electrical connection portion to form and be in the first substrate An induced electric field associated with a first conductive layer formed on the side, thereby suppressing one of liquid crystal polarization caused by external static electricity to improve display image quality.

Although the exemplary embodiments of the present invention have been described in detail for the purpose of the present invention, it is not limited thereto, and those skilled in the art will understand that various modifications, additions and substitutions are possible without the need to violate the present invention. The scope and spirit of the scope.

10. . . Upper substrate

16. . . Transparent conductive layer

20. . . Lower substrate

twenty two. . . Pixel array

29. . . Molded frame

30. . . SUS box

32. . . Copper strip

40. . . liquid crystal

210. . . First substrate

212R. . . Color filter layer

212G. . . Color filter layer

212B. . . Color filter layer

214. . . Conductive light shielding layer

216. . . Conductive layer

218. . . Coating layer

219. . . Upper conductive polarizer

220. . . Second substrate

222. . . Pixel array

224. . . Electrical connection

225. . . Sealing member

226. . . Lower polarizer

228. . . Backlight unit

229. . . Molded frame

230. . . Liquid crystal layer

310. . . First substrate

312R. . . Color filter layer

311G. . . Color filter layer

312B. . . Color filter layer

314. . . Shading layer

316. . . First conductive layer

317. . . Second conductive layer

318. . . Coating layer

319. . . Upper conductive polarizer

320. . . Second substrate

322. . . Pixel array

325. . . Sealing member

326. . . Lower polarizer

328. . . Backlight unit

329. . . Molded frame

330. . . Liquid crystal layer

332. . . Electrical connection

410. . . First substrate

412R. . . Color filter layer

412G. . . Color filter layer

412B. . . Color filter layer

414. . . Conductive light shielding layer

416. . . Conductive layer

417. . . First coating layer

418. . . Second coating layer

419. . . Upper conductive polarizer

420. . . Second substrate

422. . . Pixel array

424. . . Electrical connection

425. . . Sealing member

426. . . Lower polarizer

428. . . Backlight unit

429. . . Molded frame

430. . . Liquid crystal layer

510. . . First substrate

512R. . . Color filter layer

512G. . . Color filter layer

512B. . . Color filter layer

514. . . Shading layer

516a. . . First conductive layer

516b. . . Second conductive layer

517. . . First coating layer

518. . . Coating layer

519. . . Conductive polarizer

520. . . Second substrate

522. . . Pixel array

525. . . Sealing member

526. . . Lower polarizer

528. . . Backlight unit

529. . . Molded frame

530. . . Liquid crystal layer

532. . . Electrical connection

The above and other objects, features and other advantages of the present invention will be apparent from

The first figure is a cross-sectional view of a conventional planar switching liquid crystal display device.

Figure 2A is a cross-sectional view of a planar switching liquid crystal display device in accordance with an embodiment of the present invention.

2B is a plan view of a planar switching liquid crystal display device including a transfer dot portion of the second FIG.

The third figure is a cross-sectional view of a planar switching liquid crystal display device in accordance with another embodiment of the present invention.

The fourth figure is a cross-sectional view of a planar switching liquid crystal display device according to still another embodiment of the present invention.

Figure 5 is a cross-sectional view of a planar switching liquid crystal display device in accordance with still another embodiment of the present invention.

210. . . First substrate

212R. . . Color filter layer

212G. . . Color filter layer

212B. . . Color filter layer

214. . . Conductive light shielding layer

216. . . Conductive layer

218. . . Coating layer

219. . . Upper conductive polarizer

220. . . Second substrate

222. . . Pixel array

224. . . Electrical connection

225. . . Sealing member

226. . . Lower polarizer

228. . . Backlight unit

229. . . Molded frame

230. . . Liquid crystal layer

Claims (15)

A planar switching liquid crystal display device comprising: a first substrate having a first conductive layer and a second conductive layer, the first conductive layer and the second conductive layer being formed on each surface of the first substrate; a second substrate having a transparent pixel electrode and a transparent common electrode formed on one surface of the second substrate facing the second conductive layer; and an electrical connection portion disposed to electrically connect the first substrate a second conductive layer to the transparent common electrode, wherein a common voltage applied to the transparent common electrode is applied to the second conductive layer through the electrically conductive portion, and a color filter layer is formed on the first base And the color filter layer includes a plurality of color filter patterns, and the second conductive layer is a patterned conductive light shielding layer formed between the color filter patterns, the first The conductive layer is patterned to form a shape corresponding to one of the patterned conductive light shielding layers. The planar switching liquid crystal display device of claim 1, further comprising a conductive polarizing plate on the first conductive layer. The planar switching liquid crystal display device of claim 1, wherein the first conductive layer and the second conductive layer are formed of a metal material or a conductive resin. The planar switching liquid crystal display device of claim 1, wherein the first conductive layer and the second conductive layer are completely formed of a transparent metal material or a transparent conductive resin. The planar switching liquid crystal display device of claim 1, further comprising a coating layer between the first conductive layer and the second conductive layer. A planar switching liquid crystal display device comprising: a first substrate having a first conductive layer and a second conductive layer, the first conductive layer and the second conductive layer being formed on each surface of the first substrate; a second substrate having a transparent pixel electrode and a transparent common electrode formed on one surface of the second substrate facing the second conductive layer; and an electrical connection portion disposed to electrically connect the first substrate a second conductive layer to the transparent common electrode, wherein a color filter layer including a plurality of color filter patterns is formed on the first substrate and a light shielding layer is formed between the color filter patterns And wherein the second conductive layer is patterned to form a shape corresponding to one of the light shielding layers. A planar switching liquid crystal display device comprising: a first substrate having a first conductive layer; a second conductive layer formed on a surface of the first substrate; and the first conductive layer and the first conductive layer An insulating layer between the two conductive layers; a second substrate having a transparent pixel electrode and a transparent common electrode formed on one surface of the second substrate facing the second conductive layer; and an electrical connection portion, Is configured to electrically connect the second conductive layer to the transparent common electrode; wherein a common voltage applied to the transparent common electrode is applied to the second conductive layer through the electrical connection portion, wherein From the direction of the first substrate to the second substrate, The first conductive layer, the insulating layer, and the second conductive layer are sequentially stacked. The planar switching liquid crystal display device of claim 7, wherein the insulating layer is a coating layer to improve planarization. The planar switching liquid crystal display device of claim 7, further comprising a plurality of color filter patterns, a color filter layer is formed on the first substrate, and the second conductive layer is A patterned conductive mask between the color filter patterns. The planar switching liquid crystal display device of claim 9, wherein the first conductive layer is patterned to form a shape corresponding to one of the patterned conductive light shielding layers. The planar switching liquid crystal display device of claim 7, further comprising a color filter layer formed on the first substrate, the color filter layer comprising the color filter patterns, and A light shielding layer is formed between the plurality of color filter patterns. The planar switching liquid crystal display device of claim 7, further comprising a color filter layer formed on the first substrate, the color filter layer comprising a plurality of color filter patterns, and forming a light shielding layer between the color filter patterns, and wherein the second conductive layer is patterned to form a shape corresponding to the light shielding layer. The planar switching liquid crystal display device of claim 7, further comprising a conductive polarizing plate on the first substrate. The planar switching liquid crystal display device of claim 7, wherein the first conductive layer and the second conductive layer are formed of a metal material or a conductive resin. The planar switching liquid crystal display device of claim 7, wherein the first conductive layer and the second conductive layer are completely formed of a transparent metal material or a transparent conductive resin.