KR20060012207A - Panel and multi-domain liquid crystal display including the same - Google Patents

Abstract

A liquid crystal display according to an exemplary embodiment of the present invention includes a gate line including a gate line having a gate electrode, a gate insulating film covering the gate line, a semiconductor layer formed on the gate insulating film, and data formed on the semiconductor layer and having a source electrode. A drain electrode facing the source electrode on the line and the gate electrode, a passivation film formed on the data line, and a passivation film formed on the passivation film, electrically connected to the drain electrode, and having a cutout that divides the pixel into a plurality of domains. A thin film transistor array panel including a pixel electrode, a common electrode formed on the entire surface, a cutout portion of the pixel electrode, and a pixel are divided into a plurality of domains, and a taper structure having an inclined surface that gradually becomes thinner as it occupies a portion of the domain and moves away from the center. Preslope Which has the opposite signs. Through the pretilt film, the driving speed of the liquid crystal molecules may be improved, and the transmittance of the pixels may be partially adjusted to improve visibility.

LCD, domain control means, pretilt angle, response speed, slope, taper

Description

A display panel and a multi-domain liquid crystal display including the same {PANEL AND MULTI-DOMAIN LIQUID CRYSTAL DISPLAY INCLUDING THE SAME}

1 is a layout view of a thin film transistor array panel for a liquid crystal display according to an exemplary embodiment of the present invention.

2 is a layout view of a counter electrode display panel of a liquid crystal display according to an exemplary embodiment of the present invention;

3 is a layout view of a liquid crystal display according to an exemplary embodiment of the present invention including two display panels of FIGS. 1 and 2.

4 is a cross-sectional view of the liquid crystal display of FIG. 3 taken along the line IV-IV ';

5 is a layout view illustrating a structure of a thin film transistor array panel for a liquid crystal display according to another exemplary embodiment of the present invention.

FIG. 6 is a layout view illustrating a structure of an opposing display panel for a liquid crystal display according to another exemplary embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating a structure of a liquid crystal display including the two display panels of FIGS. 5 and 6.

FIG. 8 is a cross-sectional view of the liquid crystal display of FIG. 7 taken along the line VIII-VIII ′. FIG.                 

9 is a layout view illustrating a structure of a liquid crystal display according to another exemplary embodiment of the present invention.

FIG. 10 is a cross-sectional view of the liquid crystal display of FIG. 9 taken along the line X-X '.

The present invention relates to a display panel and a liquid crystal display including the same, and more particularly, to a display panel for dividing a pixel into a plurality of domains to obtain a wide viewing angle, and a liquid crystal display including the same.

In general, a liquid crystal display device injects a liquid crystal material between an upper substrate on which a common electrode, a color filter, and the like are formed, and a lower substrate on which a thin film transistor and a pixel electrode are formed. By applying a different potential to form an electric field to change the arrangement of the liquid crystal molecules, and through this to control the light transmittance is a device that represents the image.

However, it is an important disadvantage that the liquid crystal display device has a narrow viewing angle. In order to overcome these disadvantages, various methods for widening the viewing angle have been developed. Among them, the liquid crystal molecules are oriented vertically with respect to the upper and lower substrates, and the pixel is formed by forming a constant incision pattern or protrusion on the pixel electrode and the common electrode as the opposite electrode. The method of partitioning into multiple domains is gaining popularity.

However, a liquid crystal display device having a vertical alignment mode having protrusions or incision patterns has limitations in reducing the response speed of liquid crystals. One of the causes is that when the driving voltage is applied, the liquid crystal molecules arranged adjacent to the incision pattern at the edge of the domain are quickly rearranged by the fringe field and rearranged, but the liquid crystal molecules are arranged at the center of the domain. The responsiveness of the liquid crystal molecules is slowed down because the reorientation is determined by the collision or collision caused by the arrangement of the liquid crystal molecules arranged outside the domain.

In addition, such a multi-domain liquid crystal display has a contrast ratio reference viewing angle based on a contrast ratio of 1:10 and a gray scale inversion reference viewing angle defined as a limit angle of luminance inversion between gray scales, which are excellent in all directions of 80 ° or more. However, the gamma curve of the front side and the gamma curve of the side do not coincide with each other, resulting in inferior visibility in the left and right sides. For example, in the patterned vertically aligned (PVA) mode, which makes an incision by domain dividing means, the screen looks brighter and the color tends to shift toward white as the side faces. Occasionally, the picture appears clumped and disappears. However, as liquid crystal display devices are used for multimedia in recent years, visibility has become increasingly important as pictures and moving pictures are viewed.

Another object of the present invention is to provide a display panel capable of improving the response speed of a liquid crystal of a liquid crystal molecule while securing a transmittance of a pixel, and a liquid crystal display including the same.

In order to solve this problem, in the present invention, an insulating film is formed to have different cell gaps and applied pixel voltages in a part of a unit pixel, and the insulating film has a pretilt surface so that the liquid crystal molecules are initially inclined in an arbitrary direction. .

More specifically, in the thin film transistor array panel according to the exemplary embodiment of the present invention, a first signal line is formed on an insulating substrate, and a second signal line insulated from and intersecting the first signal line is formed. Each pixel defined by the intersection of the first signal line and the second signal line is formed with a thin film transistor having three terminals electrically connected to the pixel electrode, the first signal line, the second signal line, and the pixel electrode. In addition, a pretilt film formed of a tapered structure is formed by dividing the pixel into at least two domains, occupying a part of the domains, and gradually thinning away from the center, and having an inclined surface.

The taper angle of the pretilt film is preferably in the range of 1-10 °, the pixel electrode has a cutout, and the center of the pretilt film may overlap the cutout.

In addition, the opposing display panel according to an exemplary embodiment of the present invention has an opposing electrode formed on the insulating substrate having a plurality of pixels on the entire surface, and divides the pixels into at least two domains and takes away a part of the domains and moves away from the center. The pretilt film | membrane which consists of a taper structure which becomes gradually thinner gradually and has an inclined surface is formed.

The counter electrode has a cutout, and the center of the pretilt film preferably overlaps the cutout.                     

The liquid crystal display according to the exemplary embodiment of the present invention may include a first signal line, a second signal line insulated from and intersecting the first signal line, a pixel electrode formed for each pixel defined by the first signal line and the second signal line to cross each other, Liquid crystals formed between the first display line, the second signal line, and the first display panel having a thin film transistor having three terminals connected to the pixel electrode, and the second display panel on which the opposite electrode facing the pixel electrode is formed, and the first display panel and the second display panel. Layer. In addition, at least one side of the first insulating display panel and the second insulating display panel is formed, and the domain is divided together with a plurality of domain regulating means and domain dividing means for dividing the pixels into a plurality of domains, and occupies a part of the domain. It has a pretilt film made of a tapered structure having an inclined surface that is thinned or thickened from the domain dividing means.

The domain regulating means may be a cutout portion of the pixel electrode, and in this case, the pretilt film is preferably formed on the counter electrode.

Here, the area of the pretilt film in the domain does not exceed 50%, the average thickness of the pretilt film is in the range of 0.8-1.2 μm, and the counter electrode preferably has an incision overlapping the pretilt film.

DETAILED DESCRIPTION Embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the other part being "right over" but also another part in the middle. On the contrary, when a part is "just above" another part, there is no other part in the middle.

Next, a display panel according to an exemplary embodiment of the present invention and a multi-domain liquid crystal display including the same will be described with reference to the drawings.

1 is a layout view showing a structure of a thin film transistor array panel for a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is a layout view showing a structure of an opposing display panel for a liquid crystal display according to an exemplary embodiment of the present invention. 3 is a layout view illustrating a structure of a liquid crystal display according to an exemplary embodiment in which the display panels of FIGS. 1 and 2 are aligned, and FIG. 4 is a line IV-IV 'of the liquid crystal display of FIG. It is a cross-sectional view cut along.

The liquid crystal display according to the exemplary embodiment of the present invention is formed on the thin film transistor array panel 100 on the lower side and the opposing display panel 200 on the upper side thereof and between them, and is substantially perpendicular to the two display panels 100 and 200. It consists of a liquid crystal layer 3 containing liquid crystal molecules 310 which are oriented in a direction. In this case, alignment layers 11 and 21 are formed on each of the display panels 100 and 200, and the alignment layers 11 and 21 perpendicular to the liquid crystal molecules 310 of the liquid crystal layer 3 with respect to the display panels 100 and 200. It is preferred, but not necessarily, that it is a vertical orientation mode that allows it to be oriented. In addition, upper and lower polarizers 12 and 22 are attached to outer surfaces of the upper panel 200 and the lower panel 100, respectively.

The thin film transistor array panel 100 made of a transparent insulating material such as glass is made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), and includes a pixel electrode having cutouts 191, 192, and 193. 190 is formed, and each pixel electrode 190 is connected to a thin film transistor to receive an image signal voltage. In this case, the thin film transistor is connected to the gate line 121 for transmitting the scan signal and the data line 171 for transmitting the image signal, respectively, to turn on and off the pixel electrode 190 according to the scan signal. . Here, the pixel electrode 190 may not be made of a transparent material in the case of a reflective liquid crystal display, and in this case, the lower polarizer 12 is also unnecessary.

It is also made of a transparent insulating material such as glass, the opposing display panel 200 facing the thin film transistor array panel 100 has an opening in the pixel and the black matrix 220 to prevent light leakage generated between neighboring pixels and A reference electrode (counter electrode) 270 made of a color filter 230 of red, green, and blue and transparent conductive materials such as ITO or IZO are sequentially formed in each pixel. The black matrix 220 may be formed not only in the peripheral portion of the pixel but also in the portion overlapping the cutouts 271, 272, and 273 of the reference electrode 270. This is to prevent light leakage caused by the cutouts 271, 272, and 273.

Next, the structure of the thin film transistor array panel 100 will be described in more detail.                     

In the thin film transistor array panel 100 according to an exemplary embodiment, a plurality of gate lines 121 may be formed on the lower insulating substrate 110 to transfer gate signals. The gate line 121 mainly extends in the horizontal direction, and a part of each gate line 121 forms a plurality of gate electrodes 124. The gate electrode 124 is formed in the form of a protrusion in the gate line 121, and as shown in the present embodiment, the gate line 121 may have a contact portion for transmitting a gate signal from the outside to the gate line 121. In this case, the end portion 129 of the gate line 121 has a wider width than the other portion, but in other cases, the end portion of the gate line 121 of the gate driving circuit is formed directly on the substrate 110. It is directly connected to the output.

The storage electrode wirings are formed on the insulating substrate 110 in the same layer as the gate lines 121. Each storage electrode wiring includes a storage electrode line 131 extending in parallel with the gate line 121 at the edge of the pixel area and a plurality of storage electrodes 133a, 133b, 133c, and 133d extending therefrom. The pair of storage electrodes 133a, 133b, 133c, and 133d extend in the vertical direction and are connected to each other by the vertical electrode 133a and 133b which are connected to each other by the storage electrode line 131 extending in the horizontal direction, and the pixel electrode formed thereafter ( An oblique portion 133c and 133d overlapping the cutouts 191 and 193 of 190 and connecting the vertical portions 133a and 133b. In this case, the sustain electrode wiring may not have a pair of sustain electrodes 133a, 133b, 133c, and 133d, and may be modified into various shapes as necessary.

The gate line 121 and the sustain electrode wirings 131, 133a, 133b, 133c, and 133d are made of metal such as Al, Al alloy, Ag, Ag alloy, Cr, Ti, Ta, Mo, Mo alloy, or the like. As shown in FIG. 4, the gate line 121 and the sustain electrode wirings 131, 133a, 133b, 133c, and 133d of the present embodiment are formed of a single layer, but have excellent physicochemical properties such as Cr, Mo, Ti, Ta, and the like. It may be made of a double layer including a metal layer of the Al-based or Ag-based metal layer having a low specific resistance. In addition, the gate line 121 and the sustain electrode wirings 131, 133a, 133b, 133c, and 133d may be made of various metals or conductors, and a multilayer film capable of patterning under the same etching conditions is more preferable.

The gate line 121 and the sustain electrode wirings 131, 133a, 133b, 133c, and 133d are inclined side by side, and the inclination angle with respect to the horizontal plane is preferably 30 to 80 °.

The gate insulating layer 140 made of silicon nitride (SiNx) or the like is formed on the gate line 121 and the storage electrode wirings 131, 133a, 133b, 133c, and 133d.

A plurality of drain electrodes 175, including a plurality of data lines 171, are formed on the gate insulating layer 140. Each data line 171 extends mainly in a vertical direction and has a source electrode 173 extending from the data line 171 by extending a plurality of branches toward each drain electrode 175. The contact unit 179 located at one end of the data line 171 transfers an image signal from the outside to the data line 171. In addition, a leg metal piece 172 overlapping the gate line 121 is formed on the gate insulating layer 140.

Like the gate line 121, the data line 171 and the drain electrode 175 may be made of a material such as chromium and aluminum, and may be formed of a single layer or multiple layers.                     

Under the data line 171 and the drain electrode 175, a plurality of linear semiconductors 151 that extend mainly vertically along the data line 171 are formed. Each linear semiconductor 151 made of amorphous silicon extends toward each gate electrode 124, the source electrode 173, and the drain electrode 175 to have a channel portion 154.

Between the semiconductor 151, the data line 171, and the drain electrode 175, a plurality of linear ohmic contacts 161 and island-like ohmic contacts 165 for reducing contact resistance therebetween, respectively. Is formed. The ohmic contact 161 is made of amorphous silicon doped with silicide or n-type impurities at a high concentration, and has an ohmic contact 163 extending into a branch, and the island-type ohmic contact 165 has a gate electrode 124. Facing the ohmic contact 163.

On the data line 171 and the drain electrode 175, a-Si: C: O, a-Si formed by plasma enhanced chemical vapor deposition (PECVD), an organic material having excellent planarization characteristics, and photosensitivity. A protective film 180 made of a low dielectric constant insulating material such as: O: F or silicon nitride is formed.

The passivation layer 180 includes a plurality of contact holes 185 and 182 exposing at least a portion of the drain electrode 175 and an end portion 179 of the data line 171, respectively. Meanwhile, the end portion 129 of the gate line 121 also has a contact portion for connecting with an external driving circuit, and the plurality of contact holes 181 pass through the gate insulating layer 140 and the passivation layer 180 to pass through the gate line. Expose the end 129 of 121.

A plurality of data contact assistants 82 and 81 are formed on the passivation layer 180, including a plurality of pixel electrodes 190 having cutouts 191, 192, and 193. The pixel electrode 190 and the data contact auxiliary members 81 and 82 use a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO) or an opaque conductor having excellent light reflection characteristics such as aluminum (Al). To form.

The cutouts 191, 192, and 193 formed in the pixel electrode 190 may be divided into the horizontal cutout 192 formed in the horizontal direction at a position that half-divides the pixel electrode 190. And diagonally cut portions 191 and 193 formed in diagonal directions, respectively, in the upper and lower portions of the upper and lower portions. The cutout 192 penetrates from the right side to the left side of the pixel electrode 190, and the inlet is broadly symmetrically extended. Accordingly, the pixel electrode 190 is substantially mirror-symmetrical with respect to a line (a line parallel to the gate line) that bisects the pixel region defined by the intersection of the gate line 121 and the data line 171, respectively.

At this time, the upper and lower oblique cuts 191 and 193 are perpendicular to each other, in order to evenly distribute the direction of the fringe field in four directions.

In addition, a storage wiring connecting bridge 84 is formed on the same layer as the pixel electrode 190 to connect the storage electrode 133a and the storage electrode line 131 of the pixels adjacent to each other across the gate line 121. The storage wiring connecting bridge 84 is in contact with the storage electrode 133a and the storage electrode line 131 through the contact holes 183 and 184 formed over the passivation layer 180 and the gate insulating layer 140. The sustain wiring connection leg 84 overlaps the leg metal piece 172, and these may be electrically connected to each other. The sustain wiring connection bridge 84 serves to electrically connect the entire sustain wiring on the lower substrate 110. This holding wiring can be used to repair the defect of the gate line 121 or the data line 171, if necessary, and the leg metal piece 172 is held with the gate line 121 when irradiating a laser for such repair. It is formed to assist the electrical connection of the wiring connection bridge (84).

In the opposite display panel 200 facing the thin film transistor array panel 100, a black matrix 220 is formed on the upper insulating substrate 210 to prevent light leakage from the pixel edge. The red, green, and blue color filters 230 are formed on the black matrix 220. The planarization layer 250 is formed on the entire surface of the color filter 230, and a reference electrode 270 is formed on the color filter 230 to face the pixel electrode 190 to form an electric field for driving the liquid crystal molecules 310. It is. The reference electrode 270 is formed of a transparent conductor such as ITO or indium zinc oxide (IZO).

A pretilt film 330 is formed on the common electrode 270 having a tapered structure and having an inclined surface and made of an insulating material. In this case, the boundary line of the pretilt film 330 is positioned between the cutouts 191, 192, and 193 of the pixel electrode 190 and the centerline of the pretilt film 330 parallel thereto. Nearly parallel, the inclined surface of the pretilt film 330 faces in parallel with the cutouts 191, 192, and 193 of the pixel electrode 190. Accordingly, the pretilt film 330 has a trapezoidal shape and an inequality shape, and is formed only in a part of the pixel, and preferably, the area of the pretilt film 330 occupies no more than 50% of the pixel. The thinner the thickness of the pretilt film 330 proceeds from the center to both sides, the inclined surface having an inclined surface θ is preferably in the range of 1-10 °, and the average thickness of the pretilt film 330 is Preferably, the thickness is in the range of 0.8-1.2 μm and the maximum thickness does not exceed 3 μm.

(Make sure that the area of the pretilt film is 50-95% of the entire pixel or 50-95% of the area without the pretilt film)

In addition, an upper surface of the opposing display panel 200 is formed of an insulating material, and a substrate spacer 320 is formed to maintain a constant gap between the two display panels 100 and 200. The substrate spacer 320 may be formed of the same layer as the pretilt film 330.

When the thin film transistor substrate and the opposing display panel having the above structure are aligned and combined, and a liquid crystal material is injected and vertically aligned therebetween, a basic structure of the liquid crystal display according to the present invention is provided.

After the thin film transistor array panel 100 and the opposing display panel 200 are aligned, the liquid crystal molecules of the pixel in the state where an electric field is applied to the common electrode 270 and the pixel electrode 190 are cutouts 191 and 192 in each pixel. 193 is divided into a plurality of domains by the alignment force of the fringe field formed at the boundary of 193 and the edge boundary of the pixel electrode 190 and the alignment layer 21 formed along the inclined plane of the pretilt film 330. These domains are classified into four types according to the average major axis direction of the liquid crystal molecules located therein, and each domain is elongated to have a width and a length.                     

Therefore, the cutouts 191, 192, and 193 of the pixel electrode 190 and the pretilt film 330 formed on the common electrode 270 act as domain regulating means for dividing and aligning the liquid crystal molecules. Instead of the cutouts 191, 192, and 193, a protrusion may be formed of an inorganic material or an organic material on the upper or lower portion of the pixel electrode 190. At this time, the pretilt film 330 occupies a part of the divided domains of the pixel, and when the pretilt film 330 is a domain restricting means, the pretilt film 330 gradually becomes thinner as it moves away from the center of the domain dividing means. As the distance from the center of the cutouts 191, 192, and 193 increases, the thickness increases gradually.

In the liquid crystal display according to the exemplary embodiment of the present invention, the liquid crystal molecules 310 are aligned in an arbitrary direction by the alignment force of the alignment layer 21 inclined by the tapered structure pretilt layer 330 even when no electric field is applied. Have a constant slope. Subsequently, when a voltage is applied to the common electrode 270 and the pixel electrode 190, the liquid crystal molecules 310 are induced by the inclination of the fringe field and the pretilt film 330 by the cutouts 191, 192, and 193. Due to the change in the equipotential line due to the cell gap difference caused by the difference in the alignment force of the inclined alignment layer 21 and the thickness of the pretilt layer 330, the liquid crystal molecules 310 are divided into domains and have a pretilt angle. At this time, the liquid crystal molecules 310 which are not adjacent to the boundaries of the cutouts 191, 192, and 193 are also inclined in a predetermined direction, and thus the direction in which the liquid crystal molecules are inclined is determined. Speeds up the response. At this time, the lying direction of the liquid crystal molecules 310 inclined by the inclination of the pretilt film 330 is inclined by the fringe fields by the cutouts 191, 192, and 193 so that the lying direction of the liquid crystal molecules 310 is the same. The pretilt film 33 preferably has an inclined surface corresponding to the cutouts 191, 192, and 193.

In the liquid crystal display according to the exemplary embodiment of the present invention, the pretilt film 330 among the pixels surrounded by the gate line 121 and the data line 171, in particular, the pixels divided by the cutouts 191, 192, and 193. In some regions occupied by this, the thickness of the pretilt film 330 decreases the cell gap, which is the gap between the two display panels 100 and 200, and the electric field intensity is different than the other portions. The pretilt film 330 is changed to have a transmittance control function. Therefore, the liquid crystal display according to the exemplary embodiment of the present invention has a unit pixel including two regions having different transmittances, and thus has the same effect as driving by applying different pixel voltages to one unit pixel. .

Accordingly, the liquid crystal display according to the exemplary embodiment of the present invention divides one pixel into two regions, displays an image at a transmittance through a normal pixel voltage in one divided region, and compares the pixel voltage in another divided region. The image is displayed with transmittance for the demoted voltage. Accordingly, the visibility of the liquid crystal display when the image is displayed by compensating for distortion of the side gamma curve by displaying different gamma curves (transmittance or luminance graph with respect to the pixel voltage) of one pixel may be improved.

In this case, the thickness of the pretilt film 330 may be variously adjusted to maximize the visibility improvement effect, and the area occupied by the pretilt film 330 may also be variously modified, and may be arranged differently according to pixels.

In the liquid crystal display according to the exemplary embodiment of the present invention, when the pretilt film 330 is formed on the opposite display panel 200 as the substrate spacer 320, the common electrode 270 does not have a cutout. Patterning in the manufacturing process can be omitted.

Meanwhile, in the exemplary embodiment of the present invention, the thin film transistor array panel may have a different shape, the pretilt layer may be disposed on the thin film transistor array panel, and one embodiment will be described in detail with reference to the accompanying drawings.

5 is a layout view illustrating a structure of a thin film transistor array panel according to another exemplary embodiment. FIG. 6 is a layout view illustrating a structure of an opposing display panel according to another exemplary embodiment. FIG. 5 is a layout view illustrating a structure of a liquid crystal display according to an exemplary embodiment including two display panels of FIG. 6, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII ′ of the liquid crystal display of FIG. 7. .

As shown in FIGS. 5 and 7 to 8, the layered structure of the thin film transistor array panel of the liquid crystal display according to the present embodiment is generally a layered structure of the thin film transistor array panel of the liquid crystal display shown in FIGS. 1 and 3 to 4. Same as the structure. That is, the plurality of linear semiconductors including the plurality of gate lines 121 including the plurality of gate electrodes 124 is formed on the substrate 110, and the gate insulating layer 140 and the plurality of protrusions 154 thereon. 151, a plurality of linear ohmic contact members 161 each including a plurality of protrusions 163, and a plurality of island type ohmic contact members 165 are sequentially formed. A plurality of data lines 171 including a plurality of source electrodes 173 and a plurality of drain electrodes 175 are formed on the ohmic contacts 161 and 165 and the gate insulating layer 140, and the passivation layer 180 is formed thereon. ) Is formed. A plurality of contact holes 182, 181, and 185 are formed in the passivation layer 180 and / or the gate insulating layer 140, and contact the pixel electrode 190 having the cutouts 191, 192, and 193 thereon. Auxiliary members 81 and 82 are formed.

However, the semiconductor 151 has a planar shape substantially the same as the data line 171, the drain electrode 175, and the ohmic contacts 161 and 165, except for the protrusion 154 where the thin film transistor is located. Have. In detail, the linear semiconductor 151 may include the source electrode 173 and the drain electrode 175 in addition to the data line 171, the drain electrode 175, and the portions below the ohmic contacts 161 and 165. ) Has an exposed portion between them.

In addition, a pretilt film 330 having an inclined surface is formed on the upper portion of the pixel electrode 190 to have a gradually thinner thickness as the centers of the cutouts 191, 192, and 193 become larger, and the two display panels 100 and 200 are formed. The substrate spacer 320 which supports the space | interval of () uniformly is formed. In this case, the pixel electrode 190 may not have cutouts 191, 192, and 193.

In addition, the common electrode 270 disposed on the opposing display panel 200 includes cutouts 271, 272, and 273 positioned between the cutouts 191, 192, and 193 of the pixel electrode 190. A pair of cutouts 271, 272, and 273 of the common electrode 270 may form 45 ° with respect to the gate line 121 among the cutouts 191, 192, and 193 of the pixel electrode 190. 193 and alternately include an oblique portion parallel to the edge portion and an end portion overlapping the side of the pixel electrode 190. At this time, the end is classified into a longitudinal end part and a horizontal end part.

In the liquid crystal display according to the present exemplary embodiment, when the thin film transistor array panel 100 and the opposing display panel 200 are aligned, the cutouts 191, 192, 193, or the pretilt film 330 and the reference electrode of the pixel electrode 190 are aligned. The cutouts 271, 272, and 273 of 270 divide the pixel area into a plurality of domains. These domains are classified into four types according to the average major axis direction of the liquid crystal molecules located therein, and each domain is elongated to have a width and a length.

The thin film transistor array panel of the liquid crystal display according to the present embodiment is formed by patterning the data line 171 and the semiconductor 151 together in a photolithography process using a photoresist pattern having a different thickness depending on the position in the manufacturing process. will be.

Meanwhile, although the color filter 230 is disposed on the opposing display panel 200 in the structure of the liquid crystal display device, the color filter 230 may be disposed on the thin film transistor array panel 100. In this case, the gate insulating layer 140 or the passivation layer 180 may be disposed. It may be formed at the bottom of the. This embodiment will be described in detail with reference to the accompanying drawings.

FIG. 9 is a layout view illustrating the structure of still another liquid crystal display of the present invention, and FIG. 10 is a cross-sectional view taken along the line X-X ′ of the liquid crystal display of FIG. 9.

9 and 10, in the liquid crystal display according to the present exemplary embodiment, the layer structure of the thin film transistor array panel and the opposing display panel is generally the same as the layer structure of FIGS. 1 to 4.

However, red, green, and blue color filters 230 are sequentially formed in the pixel under the passivation layer 180. The red, green, and blue color filters 230 each have a boundary above the data line 171 and are vertically formed along a pixel column, and neighboring color filters partially overlap each other on the data line 171. The hill can be formed on the data line 171. In this case, the red, green, and blue color filters 230 overlapping each other may have a function of a black matrix that blocks light leaking between neighboring pixel areas. Therefore, only the common electrode 270 may be formed in the opposing display panel for the liquid crystal display according to the present exemplary embodiment, since the black matrix is omitted.

Meanwhile, in the exemplary embodiment of the present invention, only the liquid crystal display device in the vertical alignment mode in which the liquid crystal molecules are vertically arranged with respect to the two display panels 100 and 200 has been described. However, the driving speed of the liquid crystal molecules is increased by using the pretilt film. The configuration of the present application for controlling the transmittance of pixels at the same time is a twisted nematic mode in which the liquid crystal molecules are arranged in a spiral while being parallel to the two display panels, and the common electrode and the pixel electrodes are arranged on the same display panel to be parallel to the display panel. The present invention can be applied to various types of liquid crystal display devices such as an in-plane switching mode for driving liquid crystal molecules arranged in such a manner.

As described above, according to the exemplary embodiment of the present invention, the pre-tilt film is added to give a tilt to the liquid crystal molecules, thereby improving the response speed of the liquid crystal, thereby manufacturing a liquid crystal display device capable of realizing a video.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

Claims (13)

Insulation board, A first signal line formed on the insulating substrate, A second signal line insulated from and intersecting the first signal line, A pixel electrode formed in each pixel region defined by the crossing of the first signal line and the second signal line; A thin film transistor having three terminals electrically connected to the first signal line, the second signal line, and the pixel electrode; The pretilt film is formed of a tapered structure in which the pixel is divided into at least two domains and occupies a part of the domains, and gradually becomes thinner as the distance from the center becomes thinner. Thin film transistor array panel comprising a. In claim 1, And a taper angle of the pretilt film is in a range of 1-10 °. In claim 1, The pixel electrode has a cutout. In claim 1, And a center of the pretilt film overlapping the cutout portion. An insulated substrate having a plurality of pixels, A counter electrode formed on the insulating substrate in its entirety; The pretilt film is formed of a tapered structure in which the pixel is divided into at least two domains, and gradually occupies a portion of the domain and gradually becomes thinner toward the center. Opposing display panel comprising a. In claim 5, The opposite electrode has a cutout portion. In claim 6, The opposite display panel of which the center of the pretilt film overlaps the cutout. A first signal line, a second signal line insulated from and intersecting the first signal line, a pixel electrode formed for each pixel defined by the first signal line and the second signal line crossing, the first signal line, the second signal line, A first display panel having a thin film transistor having three terminals connected to the pixel electrode; A second display panel on which a counter electrode facing the pixel electrode is formed; A liquid crystal layer formed between the first display panel and the second display panel, A plurality of domain restricting means formed on at least one side of the first insulating display panel and the second insulating display panel and configured to divide and arrange the pixel into a plurality of domains; The pretilt film comprises a tapered structure that divides the domain together with the domain dividing means and occupies a portion of the domain and becomes thinner or thicker from the domain dividing means and has an inclined surface. Liquid crystal display comprising a. In claim 8, And the domain regulating means is a cutout portion of the pixel electrode. In claim 9, And the pretilt film is formed on the counter electrode. In claim 10, The area of the pretilt film in the domain does not exceed 50%. In claim 11, And a mean thickness of the pretilt film is in the range of 0.8-1.2 μm. In claim 12, And the counter electrode has a cutout portion overlapping the pretilt film.

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