KR101096356B1 - In-plane switching mode liquid crystal display device - Google Patents

Abstract

The present invention relates to a transverse electric field mode liquid crystal display in which a pixel electrode and a common electrode are formed on the same substrate. The present invention relates to a first substrate, a conductive layer formed on one side of the first substrate, and a color on the other side of the first substrate. Including a color filter layer consisting of a red, green and blue color filter pattern, a conductive light shielding layer formed between the color filter layer, a second substrate, and a transparent pixel electrode and a transparent common electrode on one side of the second substrate, Disclosed is a transverse electric field mode liquid crystal display device having an electrical connection portion electrically connecting a conductive light blocking layer and a transparent common electrode, wherein a common voltage applied to the transparent common electrode is applied to the conductive light blocking layer through the electrical connection portion.

According to the present invention, by effectively preventing the static electricity to suppress the whitening phenomenon caused by the liquid crystal polarization of the liquid crystal layer, it is possible to further improve the display image quality.

In-Plane Switching Mode, Liquid Crystal Display, Transfer Dotting, Conductive Seal Member

Description

Transverse electric field mode liquid crystal display device {IN-PLANE SWITCHING MODE LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a transverse electric field mode liquid crystal display device in which a pixel electrode and a common electrode are formed on a same substrate. By forming an induction electric field between the conductive light shielding layer or the second conductive layer patterned in the shape of the conductive light shielding layer, the transverse electric field mode liquid crystal display device can suppress the liquid crystal polarization caused by external static electricity to further improve display image quality. It is about.

Recently, research on an in-plane switching mode (IPS) liquid crystal display device has been actively conducted. The liquid crystal display device having a transverse electric field system forms two electrodes on the same substrate and has two electrodes. A voltage is applied between them to generate a horizontal or fringe field on the substrate.

Hereinafter, a structure of a transverse electric field type liquid crystal display device according to the prior art will be described with reference to the accompanying drawings.

1 is a cross-sectional view schematically showing a transverse electric field type liquid crystal display device according to the prior art.

In the transverse electric field type liquid crystal display according to the related art illustrated in FIG. 1, since the pixel array 22 having the pixel electrode and the common electrode is formed on one side of the lower substrate 20, the direction of the upper substrate 10 without the electrode is shown. When static electricity is generated from the liquid crystal layer LC 40, the liquid crystal polarization may occur due to static electricity, which may lower the image quality of the display. Thus, in order to prevent the liquid crystal polarization phenomenon, the copper foil tape 32 is coated on the susbezel 30 which coats the transparent conductive layer 16 on the back surface of the upper substrate 10 and surrounds the mold frame 29. By connecting, a method of discharging the static electricity introduced from the outside by grounding through the susbezel 30 when the static electricity flows.

As described above, the transparent conductive layer 16 contacts the susceptor 30 to serve as a ground electrode, and prevents charging of the upper substrate 10, which is a dielectric, when the external static electricity flows into the static electricity. Preventing the electric field from penetrating into the liquid crystal layer 40 is prevented.

However, when the metal suspend bezel 30 is removed for small size, light weight, and thinness such as mobile and portable, the transparent conductive layer 16 formed on the rear surface of the upper substrate 10 is forced to float, thereby preventing static electricity. There is a problem that can not be blocked completely.

Accordingly, the present invention has been made to solve the above-described problems, an object of the present invention is a first conductive layer formed on one side of the substrate, a common potential is applied through the electrical connection and the conductive light shielding layer formed on the other side of the first substrate or By providing an induction electric field between the second conductive layer patterned in the shape of the conductive light shielding layer, it is possible to provide a lateral field mode liquid crystal display device that can further improve the display image quality by suppressing the liquid crystal polarization caused by external static electricity.

In order to achieve the above object, an aspect of the present invention provides a first substrate, a conductive layer formed on one side of the first substrate, and colors of red, green, and blue for color implementation on the other side of the first substrate. A color filter layer including a filter pattern, a conductive light blocking layer formed between the color filter layer, a second substrate, and a transparent common electrode formed on one side of the second substrate, wherein the conductive light blocking layer and the transparent common electrode A horizontal field mode liquid crystal display device having an electrical connection unit electrically connected thereto, wherein a common voltage applied to the transparent common electrode is applied to the conductive light blocking layer through the electrical connection unit.

Preferably, the conductive layer may be replaced with a conductive polarizer.

Preferably, a conductive polarizing plate may be further included on the conductive layer.

Preferably, the conductive layer may be formed of a transparent conductive metal material containing indium tin oxide or indium zinc oxide, or a transparent conductive resin.

Preferably, the conductive layer may be patterned in a shape corresponding to the conductive light shielding layer.

Preferably, the conductive layer may be formed of a metal material or a conductive resin.

Preferably, the conductive light shielding layer may be formed of an opaque metal material or conductive black resin.

Preferably, the electrical connection portion may be a transfer dotting portion including a metal or a conductive sealing member.

Preferably, the method may further include an overcoat layer formed under the color filter layer.

Another aspect of the present invention is a color comprising a first substrate, a first conductive layer formed on one side of the first substrate, and a color filter pattern of red, green, and blue for color realization on the other side of the first substrate. A filter layer, a light shielding layer formed between the color filter layer, a second conductive layer formed under the color filter layer and substantially patterned in the shape of the light shielding layer, a second substrate, and a transparent formed on one side of the second substrate A common electrode, the electrical connection part electrically connecting the second transparent conductive layer and the transparent common electrode, and a common voltage applied to the transparent common electrode is applied to the second conductive layer through the electrical connection part. Provided is a transverse electric field mode liquid crystal display device.

Preferably, the first conductive layer may be replaced with a conductive polarizer.

Preferably, a conductive polarizer may be further included on the first conductive layer.

Preferably, the first conductive layer may be formed of a transparent conductive metal material containing indium tin oxide or indium zinc oxide, or a transparent conductive resin.

Preferably, the first conductive layer may be patterned in a shape corresponding to the light blocking layer.

Preferably, the first conductive layer may be formed of a metal material or a conductive resin.

Preferably, the second conductive layer may be formed of a metal material or a conductive resin.

Preferably, the electrical connection portion may be a transfer dotting portion including a metal or a conductive sealing member.

Preferably, an overcoat layer may be further included between the color filter layer and the second conductive layer.

According to another aspect of the present invention, a color filter layer including a first filter, a color filter pattern of red, green, and blue for color realization, a conductive light shielding layer formed between the color filter layer, and a top and a bottom of the color filter layer And first and second overcoat layers to be formed, a conductive layer formed between the first substrate and the first overcoat layer, a second substrate, and a transparent common electrode formed on one side of the second substrate. It is provided with an electrical connection portion electrically connecting the conductive light shielding layer and the transparent common electrode, and a horizontal electric field mode liquid crystal display device in which a common voltage applied to the transparent common electrode is applied to the conductive light shielding layer through the electrical connection. .

Preferably, a conductive polarizer may be further included on the first substrate.

Preferably, the conductive layer may be formed of a transparent conductive metal material containing indium tin oxide or indium zinc oxide, or a transparent conductive resin.

Preferably, the conductive layer may be patterned in a shape corresponding to the conductive light blocking layer.

Preferably, the conductive layer may be formed of a metal material or a conductive resin.

Preferably, the conductive light shielding layer may be formed of an opaque metal material or conductive black resin.

Preferably, the electrical connection portion may be a transfer dotting portion including a metal or a conductive sealing member.

According to the present invention, by applying a common potential to the conductive light shielding layer formed on the other side of the first substrate through the electrical connection to form an induction electric field with the conductive layer formed on one side of the first substrate, thereby suppressing the liquid crystal polarization phenomenon caused by external static electricity There is an effect that can improve the display quality.

In addition, by applying a common potential to the second conductive layer formed on the other side of the first substrate through the electrical connection portion to form an induction electric field with the first conductive layer formed on one side of the first substrate, thereby suppressing the liquid crystal polarization phenomenon caused by external static electricity There is an effect that can improve the display quality.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

2A is a cross-sectional view schematically illustrating a transverse electric field mode liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 2B is a schematic plan view of the transverse electric field mode liquid crystal display device including the transfer dotting unit of FIG. 2A.

2A and 2B, the transverse electric field mode liquid crystal display according to the present embodiment is described as follows.

In the transverse electric field mode liquid crystal display according to the present exemplary embodiment, the first substrate 210, the color filter layers 212R, 212G, and 212B, the conductive light shielding layer 214, the conductive layer 216, the second substrate 220, and the pixel are provided. And a pixel array 222 and an electrical connection 224 formed of an electrode and a transparent common electrode.

The conductive layer 216 is formed on one side of the first substrate 210, and when formed on the entire surface of one side of the first substrate 210, indium tin oxide (ITO) or indium zinc oxide (IZO). In addition to using a transparent conductive metal having a relatively high transmittance of light as a material, such as Indium Zin Oxide, it may be formed using a transparent conductive resin, and may be formed on one side of the first substrate 210. If the pattern is formed to correspond to the conductive light shielding layer 214, it may be formed of an opaque metal including chromium (Cr). Here, the transparent conductive resin may be made of a mixture of indium tin oxide powder and acryl (ITO Powder + Acryl) or epoxy (Epoxcy).

The upper conductive polarizer 219 may be formed on the conductive layer 216. Meanwhile, without the conductive layer 216, the upper conductive polarizer 219 may be formed on the first substrate 210 alone.

The conductive black matrix 214 serves to prevent leakage of light and preferably includes chromium (Cr). The conductive light blocking layer 214 is formed on the other side of the first substrate 210 at regular intervals, and generally distinguishes between the red, green, and blue color filter layers 212R, 212G, and 212B.

The color filter layers 212R, 212G, and 212B are formed by alternately arranging red, green, and blue color filter patterns between the conductive light shielding layers 214. The color filter layers 212R, 212G, and 212B are usually photosensitive organic. It is made of matter. On the other hand, an overcoat layer 218 is selectively formed under the color filter layers 212R, 212G, and 212B to remove flatness caused by the color filter layers 212R, 212G, and 212B to improve flatness. Can be.

A pixel array 222 including a pixel electrode and a transparent common electrode is formed on one side of the second substrate 220. On the other hand, although not shown in detail, each pixel region is defined by gate lines and data lines formed in cross directions, and switching elements are disposed at intersections of the gate lines and data lines, and pixel electrodes And the transparent common electrode are spaced apart from each other to overlap a predetermined area with an insulating layer interposed therebetween, and are formed in the pixel area to apply a voltage to the liquid crystal layer (LC) 230 to control the amount of light transmission.

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

When a common voltage is applied to the transparent common electrode of the pixel array 222, a common voltage is applied to the conductive light blocking layer 214 through the electrical connection 224 to induce between the conductive light blocking layer 214 and the conductive layer 216. Even if an external static electricity is generated due to an electric field, the liquid crystal layer 230 may not be affected. That is, an induction electric field is formed between the conductive layer 216 and the conductive light shielding layer 214 as shown by the arrows indicated in the longitudinal direction on the first substrate 210 of FIG. 2A to generate the liquid crystal polarization phenomenon in the liquid crystal layer 230. I never do that.

Reference numerals shown in FIGS. 2A and 2B include a seal member 225, a lower conductive polarizer 226, a backlight unit 228, and a mold frame 229.

When the electrical connection portion 224 is a transfer dotting portion, as shown in FIG. 2B, the transfer dotting portion 224 is preferably formed outside the sealing member 225 surrounding the pixel area.

Here, in the example in which the conductive layer 216 is replaced by the upper conductive polarizer 219 alone, an induction electric field is formed between the upper conductive polarizer 219 and the conductive light shielding layer 214.

3 is a schematic cross-sectional view of a transverse electric field mode liquid crystal display device according to another exemplary embodiment of the present invention.

Referring to FIG. 3, the transverse electric field mode liquid crystal display device includes a first substrate 310, color filter layers 312R, 312G, and 312B, a light blocking layer 314, a first conductive layer 316, and a second conductive layer 317. ), A second substrate 320, a pixel array 322 formed of a pixel electrode and a transparent common electrode, and an electrical connector 332.

The first conductive layer 316 is formed on one side of the first substrate 310, and when formed on the entire surface of one side of the first substrate 310, indium tin oxide (ITO) or indium zinc oxide (ITO). IZO; Indium Zin Oxide (IZO) can be formed using a transparent conductive metal having a relatively high transmittance of light as a material, and can be formed using a transparent conductive resin, and can be formed on one side of the first substrate 310. When patterned to correspond to the light blocking layer 314, the light blocking layer 314 may be formed of an opaque metal including chromium (Cr). Here, the transparent conductive resin may be made of a mixture of indium tin oxide powder and acryl (ITO Powder + Acryl) or epoxy (Epoxcy).

An upper conductive polarizer 319 may be formed on the first conductive layer 316. Meanwhile, the upper conductive polarizer 319 may be formed alone on the first substrate 310 without the first conductive layer 316.

The light shielding layer 314 serves to prevent leakage of light, and preferably includes a resin. The light blocking layer 314 made of resin does not reflect external incident light so that a clear display can be realized in an external environment, and when a high brightness is realized, a redish caused by internal reflection can be easily solved, and a liquid crystal display device Design and manufacturing process can be simplified.

The light blocking layer 314 is formed on the other side of the first substrate 310 at regular intervals and generally distinguishes between the red, green, and blue color filter layers 312R, 312G, and 312B.

In the color filter layers 312R, 312G, and 312B, red, green, and blue color filter patterns are alternately arranged between the light blocking layers 314, and are usually made of a photosensitive organic material. Meanwhile, an overcoat layer 318 may be selectively formed under the color filter layers 312R, 312G, and 312B to remove flatness caused by the color filter layers 312R, 312G, and 312B to improve flatness. That is, the second conductive layer 317 may be formed directly under the color filter layers 312R, 312G, and 312B without the overcoat layer 318. Here, the overcoat layer 318 preferably includes a thermosetting material.

The second conductive layer 317 is substantially patterned in the form of a gate line (not shown) or the light blocking layer 314 to be formed to face the second substrate 320 under the overcoat layer 318.

The pixel array 322 including the pixel electrode and the transparent common electrode is formed on one side of the second substrate 320. On the other hand, each pixel region is defined by gate lines and data lines (not shown) formed in the direction crossing each other. The electrodes are spaced apart from each other by overlapping a predetermined area with an insulating layer (not shown) therebetween, and are formed in the pixel area in order to adjust a light transmission amount by applying a voltage to the liquid crystal layer (LC) 330.

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

When the common voltage is applied to the transparent common electrode of the pixel array 322, the common voltage is applied to the second conductive layer 317 through the electrical connection 332, so that the second conductive layer 317 and the first conductive layer 316 are applied. Induced electric field is formed between the) even if the external static electricity does not affect the liquid crystal layer 330. That is, as indicated by the arrow, an induction electric field is formed between the first conductive layer 316 and the second conductive layer 317 so that the liquid crystal polarization does not occur in the liquid crystal layer 330.

On the other hand, when the electrical connection portion 332 is a conductive sealing member, as shown in FIG. 3, the transverse electric field mode liquid crystal display further includes a lower conductive polarizer 326, a backlight unit 328, and a mold frame 329. .

Here, in the example where the first conductive layer 316 is replaced by the upper conductive polarizer 319, an induction electric field is formed between the upper conductive polarizer 319 and the second conductive layer 317.

On the other hand, since it is the same as the basic components of the liquid crystal display device, which is not specifically mentioned, such as a general liquid crystal display device such as a thin film transistor substrate or a liquid crystal layer, a detailed description thereof will be omitted.

4 is a schematic cross-sectional view of a transverse electric field mode liquid crystal display device according to still another embodiment of the present invention.

Referring to Fig. 4, the transverse electric field mode liquid crystal display device according to the present embodiment will be described.

In the transverse electric field mode liquid crystal display device according to the present embodiment, the first substrate 410, the color filter layers 412R, 412G, and 412B, the conductive light shielding layer 414, the conductive layer 416, the second substrate 420, and the pixel And a pixel array 422 and an electrical connection 424 consisting of an electrode and a transparent common electrode.

The conductive layer 416 is formed below the first substrate 410 or between the first substrate 410 and the first overcoat layer 417, and indium is formed on the entire lower surface of the first substrate 410. Not only transparent conductive resins such as tin oxide (ITO; Induium Tin Oxide) or indium zinc oxide (IZO; Indium Zin Oxide) can be formed, but also transparent conductive resins. If the pattern is formed to correspond to the conductive light shielding layer 414 on the lower portion of the first substrate 410, it may be formed of an opaque metal including chromium (Cr). Here, the transparent conductive resin may be made of a mixture of indium tin oxide powder and acryl (ITO Powder + Acryl) or epoxy (Epoxcy). In addition, the upper conductive polarizer 419 may be formed on the first substrate 410.

The conductive black matrix 414 serves to prevent leakage of light, and preferably includes chromium (Cr). The conductive light blocking layer 414 is formed at regular intervals below the first overcoat layer 417, and generally distinguishes between the color filter layers 412R, 412G, and 412B of red, green, and blue.

The color filter layers 412R, 412G, and 412B are formed by alternately arranging red, green, and blue color filter patterns between the conductive light shielding layers 414. The color filter layers 412R, 412G, and 412B are typically photosensitive organic. It is made of matter. On the other hand, the upper and lower portions of the color filter layers 412R, 412G, and 412B may remove the steps generated by the color filter layers 412R, 412G, and 412B to improve flatness, thereby improving first and second overcoat layers ( 417 and 418 may optionally be formed.

A pixel array 422 including a pixel electrode and a transparent common electrode is formed on one side of the second substrate 420. On the other hand, although not shown in detail, each pixel region is defined by gate lines and data lines formed in cross directions, and switching elements are disposed at intersections of the gate lines and data lines, and pixel electrodes And the transparent common electrode are spaced apart from each other by overlapping a predetermined region with an insulating layer interposed therebetween, and are formed in the pixel region in order to control a light transmission amount by applying a voltage to the liquid crystal layer (LC) 430.

The electrical connection 424 is electrically connected to the conductive light blocking layer 414 and the transparent common electrode of the pixel array 422, and includes a transfer doping portion including a high conductivity metal, preferably silver (Ag), or gold And a conductive sealing member including (Au).

When a common voltage is applied to the transparent common electrode of the pixel array 422, a common voltage is applied to the conductive light blocking layer 414 through the electrical connection 424 to induce between the conductive light blocking layer 414 and the conductive layer 416. Even if an external static electricity is generated due to an electric field, the liquid crystal layer 430 may not be affected. That is, an induction electric field is formed between the conductive layer 416 and the conductive light shielding layer 414 as shown by the arrow shown in the longitudinal direction in the first overcoat layer 417 of FIG. 4 to generate the liquid crystal polarization phenomenon in the liquid crystal layer 430. I never do that.

Reference numerals shown in FIG. 4 are the lower conductive polarizer 426, the backlight unit 428, and the mold frame 429.

On the other hand, the preferred embodiment of the transverse electric field mode liquid crystal display device according to the present invention described above, but is not limited to this, it can be applied to any liquid crystal display device using the optical anisotropy and polarization of the liquid crystal. It is also possible to carry out various modifications within the scope of the claims and the detailed description of the invention and the accompanying drawings, which also belong to the invention.

1 is a cross-sectional view schematically showing a transverse electric field type liquid crystal display device according to the prior art.

2A is a schematic cross-sectional view of a transverse electric field mode liquid crystal display device according to an exemplary embodiment of the present invention.

FIG. 2B is a schematic plan view of a transverse electric field mode liquid crystal display including the transfer dotting portion of FIG. 2A.

3 is a schematic cross-sectional view of a transverse electric field mode liquid crystal display device according to another exemplary embodiment of the present invention.

4 is a schematic cross-sectional view of a transverse electric field mode liquid crystal display device according to still another embodiment of the present invention.

Claims (19)

A first substrate, A conductive layer formed on one side of the first substrate, A color filter layer formed of a color filter pattern of red, green, and blue for color implementation on the other side of the first substrate; A conductive light shielding layer formed between the color filter layers; A second substrate, Including a transparent common electrode formed on one side of the second substrate, And an electrical connection part electrically connecting the conductive light blocking layer and the transparent common electrode, and a common voltage applied to the transparent common electrode is applied to the conductive light blocking layer through the electrical connection part, thereby providing the conductive light blocking layer and the conductive layer. To create an induction electric field between them, And the conductive layer is patterned into a shape corresponding to the conductive light shielding layer. delete The method according to claim 1, And a conductive polarizing plate on the conductive layer. The method according to claim 1, And a overcoat layer formed under the color filter layer. A first substrate, A first conductive layer formed on one side of the first substrate, A color filter layer formed of a color filter pattern of red, green, and blue for color implementation on the other side of the first substrate; A light blocking layer formed between the color filter layers; A second conductive layer formed under the color filter layer and patterned substantially in the shape of the light blocking layer; A second substrate, Including a transparent common electrode formed on one side of the second substrate, An electrical connection part electrically connecting the second conductive layer and the transparent common electrode, and a common voltage applied to the transparent common electrode is applied to the second conductive layer through the electrical connection part to provide the first conductive layer; Induction electric field is formed between the second conductive layer, And the first conductive layer is patterned in a shape corresponding to the light blocking layer. delete 6. The method of claim 5, And a conductive polarizing plate on the first conductive layer. 6. The method of claim 5, And an overcoat layer between the color filter layer and the second conductive layer. A first substrate, A color filter layer consisting of red, green, and blue color filter patterns for color realization, A conductive light shielding layer formed between the color filter layers; First and second overcoat layers formed on and under the color filter layer; A conductive layer formed between the first substrate and the first overcoat layer; A second substrate, Including a transparent common electrode formed on one side of the second substrate, And an electrical connection part electrically connecting the conductive light blocking layer and the transparent common electrode, wherein a common voltage applied to the transparent common electrode is applied to the conductive light blocking layer through the electrical connection part. The method of claim 9, The transverse electric field mode liquid crystal display device further comprising a conductive polarizing plate on the first substrate. The method according to claim 1 or 9, And the conductive light shielding layer is formed of an opaque metal material or a conductive black resin. The method according to claim 1 or 9, And the conductive layer is formed of a transparent conductive metal material containing indium tin oxide or indium zinc oxide, or a transparent conductive resin. The method of claim 9, And the conductive layer is patterned into a shape corresponding to the conductive light shielding layer. The method according to claim 1 or 9, And the conductive layer is formed of a metal material or a conductive resin. The method according to any one of claims 1, 5 or 9, And the electrical connection part is a transfer dotting part including a metal or a conductive sealing member. 6. The method of claim 5, And wherein the light blocking layer is formed of an opaque metal material or a conductive black resin. 6. The method of claim 5, And the first conductive layer is formed of a transparent conductive metal material including indium tin oxide or indium zinc oxide, or a transparent conductive resin. delete 6. The method of claim 5, And the first or second conductive layer is formed of a metal material or a conductive resin.

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