KR20210129785A - Liquid crystal display - Google Patents

Abstract

According to an embodiment of the present invention, a liquid crystal display device includes: a gate line positioned on a substrate and extending in a first direction; a data line extending in a second direction; and a pixel electrode positioned on the substrate, electrically connected to the gate line and the data line, and including four subregions. Among the four subregions of the pixel electrode, two subregions adjacent to the data line and positioned above and below the data line in a direction in which the data line extends overlap the data line, and among the four subregions of the pixel electrode, except for the two subregions, remaining two subregions do not overlap the data lines. An area of the two subregions overlapping the data line may be greater than an area of the remaining two subregions not overlapping the data line. Accordingly, it is possible to reduce an effect of parasitic capacitance deviation between the pixel electrode and the data line while preventing decrease in an aperture ratio.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}

The present disclosure relates to a liquid crystal display device.

A liquid crystal display device is one of the most widely used flat panel display devices at present. It consists of two display panels on which electric field generating electrodes such as a pixel electrode and a common electrode are formed, and a liquid crystal layer interposed therebetween. is applied to generate an electric field in the liquid crystal layer, which determines the alignment of liquid crystal molecules in the liquid crystal layer and controls the polarization of incident light to display an image.

According to the liquid crystal display device, an electric field is generated in the liquid crystal layer by applying a voltage to the pixel electrode and the common electrode, and parasitic capacitance is generated between the data line applying the data voltage to the pixel electrode and the pixel electrode. When a difference in overlapping area between the line and the pixel electrode occurs, a difference in parasitic capacitance occurs, and accordingly, the strength of an electric field charged in the liquid crystal layer may vary, and display quality may deteriorate.

On the other hand, as the resolution of the liquid crystal display increases, the size of the pixel electrode decreases, and a fast data voltage needs to be charged to many pixels, but a parasitic capacitance difference between the pixel electrode and the adjacent data line may occur. If the gap between the pixel electrode and the data line is increased in order to reduce the parasitic capacitance between the pixel electrode and the data line, the aperture ratio is decreased.

Embodiments are intended to reduce an effect of a parasitic capacitance deviation between a pixel electrode and a data line while preventing a decrease in an aperture ratio in a high-resolution liquid crystal display device.

It is apparent that the object of the present invention is not limited to the above-mentioned purpose, and can be variously expanded without departing from the spirit and scope of the present invention.

The liquid crystal display according to the embodiment is positioned on a substrate, a gate line extending in a first direction and a data line extending in a second direction, and positioned on the substrate and electrically connected to the gate line and the data line, and includes four subregions. wherein among the four subregions of the pixel electrode, two subregions adjacent to the data line and positioned above and below the data line in a direction in which the data line is extended overlap the data line, Of the four subregions of the pixel electrode, the remaining two subregions excluding the two subregions do not overlap the data line, and areas of the two subregions overlapping the data line do not overlap the data line. It may be larger than the area of the remaining two subregions.

In the first direction, a first width of the two subregions overlapping the data line may be wider than a second width of the remaining two subregions not overlapping the data line.

A difference between the first width and the second width may be substantially equal to a width of the data line.

A distance between the outer edges of the two subregions overlapping the data line and the data line along the first direction on a plane may be equal to or greater than a width of the data line.

A distance between the data lines and the outer edges of the two subregions overlapping the data lines in the first direction on a plane may be about 5 μm or more.

In the liquid crystal display, a sustain voltage line extending in parallel with the gate line, a sustain voltage line extending from the sustain voltage line in a direction parallel to the data line, and a color filter positioned between the data line and the pixel electrode are positioned on the same layer as the gate line. may further include, wherein the color filter may include a first color filter and a second color filter that transmit light of different wavelengths, wherein the first color filter and the second color filter are disposed on the storage electrode. can overlap each other.

The pixel electrode includes a horizontal stem extending in a first direction, a vertical stem extending up and down from the horizontal stem in a direction parallel to a second direction different from the first direction, the horizontal stem, and the first vertical stem. An outer stem extending from the stem and the second vertical stem to be positioned at an outer portion of the pixel electrode, the horizontal stem, the vertical stem, and the outer stem extending in different directions It may include a first branch electrode, a second branch electrode, a third branch electrode, and a fourth branch electrode.

The four subregions include a first subregion including the first branch electrode, a second subregion including the second branch electrode, a third subregion including the second branch electrode, and the fourth branch electrode. may include a fourth subregion including The first subregion and the third subregion may overlap the data line, and the second subregion and the fourth subregion may not overlap the data line.

In the first direction, a first width of the first subregion and the third subregion may be wider than a second width of the second subregion and the fourth subregion, and the first width and the second subregion The difference between the two widths may be substantially equal to the width of the data line.

The liquid crystal display according to the embodiment is positioned on a substrate, a gate line extending in a first direction, a data line extending in a second direction, and positioned on the substrate, electrically connected to the gate line and the data line, each of which has four parts. a plurality of pixel electrodes including a region, wherein the pixel electrode positioned on the left side of the data line and the pixel electrode positioned on the right side of the data line in the second direction are alternately electrically connected to the data line; , the pixel electrode positioned on the left side of the data line and the pixel electrode positioned on the right side of the data line in the second direction alternately overlap the data line, and among the four subregions of the pixel electrode, the data Two subregions adjacent to the line and positioned above and below the data line in the extending direction overlap the data line, and among the four subregions of the pixel electrode, the remaining two subregions except for the two subregions A region may not overlap the data line, and an area of the two subregions overlapping the data line may be greater than an area of the other two subregions that do not overlap the data line.

The liquid crystal display according to the embodiment is positioned on a substrate, a gate line extending in a first direction, a data line extending in a second direction, and positioned on the substrate, electrically connected to the gate line and the data line, each of which has four parts. a plurality of pixel electrodes including a region, wherein the data line is electrically connected to the pixel electrode positioned on one side of the data line along the second direction, and the data line is the pixel electrode positioned on the one side of the four subregions of The remaining two subregions except for the data line may not overlap the data line, and an area of the two subregions overlapping the data line may be greater than an area of the remaining two subregions not overlapping the data line.

According to embodiments, in the high-resolution liquid crystal display, an effect of a parasitic capacitance deviation between a pixel electrode and a data line may be reduced while preventing a decrease in an aperture ratio.

It is apparent that the effects of the present invention are not limited to the above-described effects, and can be variously expanded without departing from the spirit and scope of the present invention.

1 is a layout view of a plurality of pixels of a liquid crystal display according to an exemplary embodiment.
FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 .
3 is a plan view of one pixel of the liquid crystal display of FIG. 1 .
4 is a plan view of one pixel electrode of the liquid crystal display of FIG. 1 .
FIG. 5 is an enlarged view of a part of FIG. 3 .
FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 1 .
7 is a layout view of a plurality of pixels of a liquid crystal display according to another exemplary embodiment.

Hereinafter, with reference to the accompanying drawings, various embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are given to the same or similar elements throughout the specification.

In addition, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar. In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. And in the drawings, for convenience of description, the thickness of some layers and regions are exaggerated.

Also, when a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, it includes not only cases where it is “directly on” another part, but also cases where another part is in between. . Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle. In addition, to be "on" or "on" the reference portion is to be located above or below the reference portion, and does not necessarily mean to be located "on" or "on" the opposite direction of gravity. .

In addition, throughout the specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, throughout the specification, when referring to "planar", it means when the target part is viewed from above, and "in cross-section" means when viewed from the side when a cross-section of the target part is vertically cut.

In addition, throughout the specification, when "connected", this does not mean that two or more components are directly connected, but two or more components are indirectly connected through other components, physically connected As well as being electrically connected, or being referred to by different names according to location or function, it may mean one thing.

A liquid crystal display according to an exemplary embodiment will be described with reference to FIGS. 1 and 2 . FIG. 1 is a layout view of a liquid crystal display according to an embodiment, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 .

1 and 2 , the liquid crystal display according to the embodiment includes a first panel 100 and a second panel 200 facing each other, and a liquid crystal layer 3 positioned therebetween.

First, the first display panel 100 will be described.

The first display panel 100 includes a first substrate 110 . The first substrate 110 may be made of transparent glass or plastic.

A plurality of gate lines 121 and a plurality of sustain voltage lines 131 are positioned on the first substrate 110 . The plurality of gate lines 121 and the plurality of sustain voltage lines 131 may be simultaneously formed through the same process and may include the same material.

Each gate line 121 transmits a gate signal, extends in the first direction DR1 , and includes a plurality of gate electrodes 124 .

Each storage voltage line 131 extends in the first direction DR1 in parallel with the gate line 121 , and includes a first storage electrode 132 and a second storage electrode 135 extending therefrom. The first storage electrode 132 is a portion extending from the storage voltage line 131 in the second direction DR2 , and the second storage electrode 135 extends from the first storage electrode 132 toward the contact hole 185 . part that has been

The gate insulating layer 140 is positioned on the plurality of gate lines 121 and the plurality of sustain voltage lines 131 . The gate insulating layer 140 may include silicon oxide or silicon nitride. The gate insulating layer 140 may have a multilayer structure including at least two insulating layers having different physical properties.

A semiconductor 154 is positioned on the gate insulating layer 140 . The semiconductor 154 may be positioned to overlap the gate electrode 124 .

The semiconductor 154 may include polysilicon or an oxide semiconductor. At this time, the oxide semiconductor is titanium (Ti), hafnium (Hf), zirconium (Zr), aluminum (Al), tantalum (Ta), germanium (Ge), zinc (Zn), gallium (Ga), tin (Sn) Alternatively, an oxide based on indium (In) or a complex oxide thereof may be included.

Ohmic contact members 163 and 165 may be positioned on the semiconductor 154 .

The ohmic contact members 163 and 165 may be made of a material such as n+ hydrogenated amorphous silicon doped with an n-type impurity such as phosphorus in a high concentration, or may be made of silicide. The ohmic contact members 163 and 165 may be omitted, and in this case, a portion of the semiconductor 154 may be doped with impurities.

A plurality of data lines 171 and a plurality of drain electrodes 175 are positioned on the gate insulating layer 140 and the ohmic contact members 163 and 165 . The data line 171 includes a plurality of source electrodes 173 extending over the semiconductor 154 .

In the column direction, the plurality of source electrodes 173 of each data line 171 are alternately positioned on the right and left sides of each data line 171 , and are positioned on the right and left sides of each data line 171 along the column direction. is electrically connected to the pixel electrode.

The two adjacent data lines 171 may apply data voltages having different polarities, and the polarities of the data voltages applied to the data lines 171 may change for each frame. As described above, adjacent data lines 171 apply data voltages of different polarities, and in the column direction, each data line 171 is alternately connected to two pixel electrodes 191 positioned on both sides, thereby forming the data line 171 . ) is column inversion driving, but the apparent inversion of each pixel may be dot inversion.

Each data line 171 includes a first horizontal portion 71a and a second horizontal portion 71b positioned above and below the source electrode 173 . The first horizontal portion 71a is positioned between the data line and the source electrode 173 , and the second horizontal portion 71b includes the data line 171 and the source electrode 173 positioned in pixels adjacent to each other in the row and column directions. can be located between

Each of the gate electrode 124 , each source electrode 173 , and each drain electrode 175 described above forms one thin film transistor (TFT) together with each semiconductor 154 , and the channel of the thin film transistor is a source electrode. It is formed in the semiconductor 154 between the 173 and the drain electrode 175 .

A first passivation layer 180a is positioned on the plurality of data lines, the plurality of drain electrodes 175 , the gate insulating layer 140 , and the exposed semiconductor 154 . The first passivation layer 180a may include silicon nitride or silicon oxide.

A plurality of color filters 230 are positioned on the first passivation layer 180a. Here, the first passivation layer 180a may prevent the pigment of the color filter 230 from flowing into the exposed portion of the semiconductor 154 .

Each color filter 230 may include a red color filter, a green color filter, and a blue color filter. Each of the color filters 230 may be positioned in a region defined by the intersection of the plurality of gate lines 121 and the data lines 171 , respectively.

A second passivation layer 180b is positioned on the color filter 230 .

The second passivation layer 180b may include an inorganic insulating material such as silicon nitride or silicon oxide, an organic insulating material, or a low dielectric constant insulating material. The second passivation layer 180b prevents the color filter 230 from floating and suppresses contamination of the liquid crystal layer 3 by organic substances such as a solvent flowing from the color filter 230, which may be caused when the screen is driven. Defects such as afterimages can be prevented.

A plurality of contact holes 185 overlapping the plurality of drain electrodes 175 may be formed in the first passivation layer 180a , the color filter 230 , and the second passivation layer 180b .

A plurality of pixel electrodes 191 are positioned on the second passivation layer 180b. Each pixel electrode 191 is formed on the first passivation layer 180a , the color filter 230 , and the second passivation layer 180b , and the drain electrode 175 is formed through a contact hole 185 overlapping the drain electrode 175 , respectively. ) and can be physically and electrically connected. The pixel electrode 191 receives a data voltage through the drain electrode 175 .

The pixel electrode 191 may include a transparent conductor such as ITO or IZO.

Each pixel electrode 191 is electrically connected to one source electrode 173 and overlaps the data line 171 .

As will be described later, a maximum distance between the edge of the pixel electrode 191 adjacent to the data line 171 and the edge of the data line 171 is wider than the width of the data line 171 , and thus the data line ( Even if an alignment error occurs during the process of forming the 171 and the pixel electrode 191 , the overlapping area between the data line 171 and the pixel electrode 191 in an adjacent pixel area may not change.

Accordingly, the parasitic capacitance variation between the pixel electrode 191 and the data line 171 can be prevented, and crosstalk defects caused by the parasitic capacitance variation can be prevented.

The liquid crystal display according to the embodiment may have an ultra-high resolution capable of realizing an 8K image having a resolution of 7,680 X 4,320, and for example, an interval between two adjacent data lines may be about 60 μm to about 75 μm. have.

In general, in order to reduce the effect of the parasitic capacitance between the pixel electrode and the data line, the gap between the pixel electrode and the data line may be widened, and a shielding electrode overlapping the data line may be formed to apply a common voltage. In this case, the size of the pixel electrode may be very small, and accordingly, the aperture ratio of the liquid crystal display is greatly reduced.

However, according to the liquid crystal display according to the embodiment, since the pixel electrode of the liquid crystal display having high resolution overlaps the data line, parasitic capacitance deviation can be prevented without forming a shielding electrode, and thus the aperture ratio of the liquid crystal display can be increased. have.

A characteristic of each pixel electrode 191 will be described in more detail later.

A blocking electrode 91 disposed on the same layer as the pixel electrode 191 and extending in the first direction DR1 along the gate line 121 may include the blocking electrode 91 overlapping the gate line 121 . The blocking electrode 91 may prevent the parasitic capacitance from being affected by the gate line 121 and may be omitted.

Next, the second display panel 200 will be described. The second display panel 200 includes a second substrate 210 . The second substrate 210 may be made of transparent glass or plastic.

The light blocking member 220 is positioned on the surface of the second substrate 210 close to the liquid crystal layer 3 .

The light blocking member 220 may have an opening positioned in a region overlapping the pixel electrode 191 of the first display panel 100 . For example, most of the light blocking member 220 may be positioned in a region overlapping the gate line 121 , the sustain voltage line 131 , and the data line 171 .

An overcoat 250 is positioned between the light blocking member 220 and the liquid crystal layer 3 . The overcoat 250 may be omitted in some embodiments. A common electrode 270 is positioned between the overcoat 250 and the liquid crystal layer 3 . The common electrode 270 may receive a common voltage from the outside.

The liquid crystal layer 3 includes liquid crystal molecules (not shown).

The pixel electrode 191 and the common electrode 270 to which the data voltage is applied generate an electric field to determine the direction of liquid crystal molecules in the liquid crystal layer 3 between the two electrodes 191 and 270 . The polarization of light passing through the liquid crystal layer 3 varies according to the direction of the liquid crystal molecules determined as described above. The pixel electrode 191 and the common electrode 270 form a liquid crystal capacitor together with the portion of the liquid crystal layer 3 therebetween to maintain the applied voltage even after the thin film transistor is turned off.

Then, the arrangement of the pixel electrode and the data line of the liquid crystal display according to the embodiment will be described in more detail with reference to FIGS. 3 to 5 along with FIGS. 1 and 2 . FIG. 3 is a plan view of one pixel of the liquid crystal display of FIG. 1 , FIG. 4 is a plan view of one pixel electrode of the liquid crystal display of FIG. 1 , and FIG. 5 is an enlarged view of a portion of FIG. 3 .

FIG. 3 illustrates one pixel electrode 191 of the plurality of pixel electrodes 191 , a data line 171 overlapping the pixel electrode 191 and electrically connected to each other, and a transistor.

3 and 4 , each pixel electrode 191 overlaps an electrically connected data line 171 and includes four subregions Da, Db, Dc, and Dd.

Each pixel electrode 191 includes a horizontal stem 192 extending in the first direction DR1 , a vertical stem 193 extending upward and downward from the horizontal stem in the second direction DR2 , and an outer edge of the pixel electrode. and includes an outer stem portion 194 extending from the horizontal stem portion 192 and the vertical stem portion 193 . The outer stem portion 194 is not located in a portion adjacent to the transistor among the outer portions of the pixel electrode.

Also, the pixel electrode 191 includes a plurality of first branch electrodes 195a extending in different directions from the horizontal stem portion 192 , the vertical stem portion 193 , and the outer stem portion 194 , and a plurality of second branch electrodes. It includes branch electrodes 195b, a plurality of third branch electrodes 195c, and a plurality of fourth branch electrodes 195d.

When a data voltage is applied to the pixel electrode 191 and a common voltage is applied to the common electrode 270 , the plurality of first branch electrodes 195a and the plurality of second branch electrodes 195b of the pixel electrode 191 are applied. ), the edge sides of the plurality of third branch electrodes 195c and the plurality of fourth branch electrodes 195d are perpendicular to the sides of the plurality of branch electrodes 195a , 195b , 195c and 195d by distorting the electric field. A horizontal component is created, and the inclination direction of the liquid crystal molecules is determined in a direction determined by the horizontal component. Therefore, the liquid crystal molecules are initially inclined in a direction perpendicular to the sides of the plurality of branch electrodes 195a, 195b, 195c, and 195d. However, since the spacing between the adjacent plurality of branch electrodes 195a, 195b, 195c, and 195d is narrow, liquid crystal molecules inclined in opposite directions are combined with the plurality of branch electrodes 195a, 195b, 195c, and 195d. It is inclined in a direction parallel to the longitudinal direction.

The pixel electrode 191 includes a plurality of first branch electrodes 195a, a plurality of second branch electrodes 195b, a plurality of third branch electrodes 195c, and a plurality of fourth branch electrodes 195d. The liquid crystal molecules of the liquid crystal layer 3 include four first subregions Da, second subregion Db, third subregion Dc, and fourth subregion Dd having different lengthwise directions. There are also four directions in which they are inclined. As described above, if the direction in which the liquid crystal molecules are inclined is varied, the reference viewing angle of the liquid crystal display device is increased.

Among the four subregions Da, Db, Dc, and Dd of the pixel electrode 191 , the first subregion Da and the third subregion Dc adjacent to the data line 171 overlap the data line 171 . and the second subregion Db and the fourth subregion Dd do not overlap the data line 171 .

Areas of the first subregion Da and the third subregion Dc overlapping the data line 171 among the four subregions Da, Db, Dc, and Dd of the pixel electrode 191 are the data line 171 . ) are larger than the areas of the second subregion Db and the fourth subregion Dd that do not overlap. That is, as shown in FIG. 4 , in the first direction DR1 in which the gate line 121 extends, the first width W1 of the first subregion Da and the third subregion Dc is It is wider than the second width W2 of the second subregion Db and the fourth subregion Dd. A difference between the first width W1 and the second width W2 may be substantially equal to the width of the data line 171 .

The first width W1 of the first subregion Da and the third subregion Dc overlapping the data line 171 is equal to the width of the data line 171 , and the second subregion does not overlap the data line 171 by the same width as the data line 171 . By forming the subregion Db and the fourth subregion Dd wider than the second width W2, they do not overlap the data line 171 between the first subregion Da and the third subregion Dc. The width of the non-existent portion becomes substantially equal to the width of the second subregion Db and the fourth subregion Dd, and accordingly, the first subregion Da to the second subregion Da to excluding the portion overlapping the data line 171 . The area of the opening of the 4 sub-region Dd is substantially the same.

By making the areas of the openings of the first sub-region Da to the fourth sub-region Dd including the plurality of branch electrodes extending in different directions the same, there is no difference in brightness visible in different directions, and thus the side surface Prevents loss of visibility.

Referring to FIG. 5 , a distance D1 between the outer edge of the outer stem portion 194 of the pixel electrode 191 and the edge of the data line 171 may be wider than the data line 171 , for example. For example, it may be about 5 μm or more.

As such, by forming the wide gap D1 between the pixel electrode 191 and the data line 171 , even if an alignment error occurs between the data line and the pixel electrode when the pixel electrode of an adjacent pixel is formed, the pixel electrode and the data according to the alignment error The overlapping area between the lines may not change.

As such, it is possible to prevent a variation in the parasitic capacitance by preventing a change in the overlapping area between the pixel electrode 191 and the data line 171 , and to prevent a crosstalk defect caused by the variation in the parasitic capacitance.

Then, the positions of the storage electrode 132 and the color filter 230 of the liquid crystal display will be described with reference to FIG. 6 . FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 1 .

Referring to FIG. 6 , a first color filter 230a and a second color filter 230a that overlap two pixel electrodes 191 adjacent to the storage electrode 132 extending in the second direction DR2 and transmit light of different wavelengths An overlapping portion 23 of the color filter 230b is positioned. As such, by including the storage electrode 132 extending between the two adjacent pixel electrodes 191 and locating the overlapping portions of the two adjacent color filters 230a and 230b on the storage electrode 132 , there is no separate light blocking member. Light leakage between the pixel electrodes 191 may be prevented.

Next, a liquid crystal display according to another exemplary embodiment will be described with reference to FIG. 7 . 7 is a layout view of a plurality of pixels of a liquid crystal display according to another exemplary embodiment.

Referring to FIG. 7 , the liquid crystal display according to the embodiment illustrated in FIG. 7 is similar to the liquid crystal display according to the embodiment described with reference to FIGS. 1 to 6 . A detailed description of the same components will be omitted.

Referring to FIG. 7 together with FIGS. 1 to 6 , the liquid crystal display according to the present exemplary embodiment differs from the liquid crystal display illustrated in FIG. 1 in the same pixel along the second direction DR2 in which the data line 171 extends. The pixel electrodes 191 positioned in a column are connected to the source electrodes 173 of the same data line 171 . As described above, since the pixel electrodes positioned in the same pixel column are connected to the same data line, the data line 171 may be driven by column inversion, and the apparent inversion may also be column inversion.

Each data line 171 includes a first horizontal portion 71a and a second horizontal portion 71b positioned above and below the source electrode 173 . Unlike the embodiment shown in FIG. 1 , the first horizontal portion 71a and the second horizontal portion 71b of the data line 171 protrude in the same direction from above and below the source electrode 173 .

In the liquid crystal display according to the present exemplary embodiment, similar to the liquid crystal display shown in FIG. 1 , the data line 171 and the pixel electrode 191 overlap each other.

Referring to FIGS. 3 and 4 together with FIG. 7 , among the four subregions Da, Db, Dc, and Dd of the pixel electrode 191 , the first subregion Da and the third subregion adjacent to the data line 171 are The subregion Dc overlaps the data line 171 , the second subregion Db and the fourth subregion Dd do not overlap the data line 171 , and the four subregions of the pixel electrode 191 do not overlap the data line 171 . Areas of the first subregion Da and the third subregion Dc overlapping the data line 171 among the areas Da, Db, Dc, and Dd are the second subregions not overlapping the data line 171 . It is larger than the area of (Db) and the fourth subregion (Dd).

The first width W1 of the first subregion Da and the third subregion Dc overlapping the data line 171 is equal to the width of the data line 171 , and the second subregion does not overlap the data line 171 by the same width as the data line 171 . By forming the subregion Db and the fourth subregion Dd wider than the second width W2, they do not overlap the data line 171 between the first subregion Da and the third subregion Dc. The width of the non-existent portion becomes substantially equal to the width of the second subregion Db and the fourth subregion Dd, and accordingly, the first subregion Da to the second subregion Da to excluding the portion overlapping the data line 171 . The area of the opening of the 4 sub-region Dd is substantially the same.

Referring to FIG. 5 together with FIG. 7 , on one plane along the first direction DR1 , among the edges of the pixel electrode 191 , the first subregion Da overlapping the data line 171 and the third The distance D1 between the outer edge of the subregion Da and the edge of the data line 171 may be wider than the width of the data line 171 , and may be, for example, about 5 μm or more. The distance D1 may vary depending on a vertical alignment error between the data line 171 and the pixel electrode 191 , but may include a gap D1 of at least about 5 μm or more.

As such, by forming the wide gap D1 between the pixel electrode 191 and the data line 171 , even if an alignment error occurs between the data line and the pixel electrode when the pixel electrode of an adjacent pixel is formed, the pixel electrode and the data according to the alignment error The overlapping area between the lines may not change.

As such, it is possible to prevent a variation in the parasitic capacitance by preventing a change in the overlapping area between the pixel electrode 191 and the data line 171 , and to prevent a crosstalk defect caused by the variation in the parasitic capacitance.

All features of the liquid crystal display according to the exemplary embodiment described above with reference to FIGS. 1 to 6 may be applied to the liquid crystal display according to the present exemplary embodiment.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improved forms of the present invention are also provided by those skilled in the art using the basic concept of the present invention as defined in the following claims. is within the scope of the right.

100, 200: display panel 3: liquid crystal layer
110, 210: substrate 121: gate line
124: gate electrode 140: gate insulating film
154 semiconductor 171 data line
180a, 180b: protective film 191: pixel electrode
192: horizontal stem portion 193: vertical stem portion
194: outer stem portion
195a, 195b, 195c, 195d: branch electrodes
220: light blocking member 230: color filter
250: overcoat 270: common electrode
Da, Db, Dc, Dd: subregions

Claims (20)

a gate line positioned on the substrate and extending in a first direction and a data line extending in a second direction; and
a pixel electrode positioned on the substrate, electrically connected to the gate line and the data line, and including four subregions;
of the four subregions of the pixel electrode, two subregions adjacent to the data line and positioned above and below the data line in a direction in which the data line is extended overlap the data line;
of the four subregions of the pixel electrode, the remaining two subregions excluding the two subregions do not overlap the data line;
An area of the two subregions overlapping the data line is greater than an area of the remaining two subregions not overlapping the data line.
In claim 1,
In the first direction, a first width of the two subregions overlapping the data line is wider than a second width of the remaining two subregions not overlapping the data line.
In claim 2,
A difference between the first width and the second width is substantially equal to a width of the data line.
In claim 3,
A distance between the data lines and outer edges of the two subregions overlapping the data lines in the first direction on a plane is equal to or greater than a width of the data lines.
In claim 4,
A distance between the data lines and the outer edges of the two subregions overlapping the data lines in the first direction on a plane is about 5 μm or more.
In claim 3,
a sustain voltage line positioned on the same layer as the gate line and extending in parallel with the gate line;
a storage electrode extending from the storage voltage line in a direction parallel to the data line; and
a color filter positioned between the data line and the pixel electrode;
The color filter includes a first color filter and a second color filter that transmit light of different wavelengths,
The first color filter and the second color filter overlap each other on the storage electrode.
In claim 1,
The pixel electrode includes a horizontal stem extending in a first direction;
a vertical stem extending up and down from the horizontal stem in a direction parallel to a second direction different from the first direction;
an outer stem portion extending from the horizontal stem portion and the first vertical stem portion and the second vertical stem portion to be positioned at an outer portion of the pixel electrode;
a first branch electrode, a second branch electrode, a third branch electrode, and a fourth branch electrode positioned between the horizontal stem part, the vertical stem part, and the outer stem part and extending in different directions;
The four subregions include a first subregion including the first branch electrode, a second subregion including the second branch electrode, a third subregion including the second branch electrode, and the fourth branch electrode. A fourth sub-region comprising
the first sub-region and the fourth sub-region are positioned at a diagonal angle to each other;
the second sub-region and the third sub-region are positioned at a diagonal angle to each other;
The first subregion and the third subregion overlap the data line, and the second subregion and the fourth subregion do not overlap the data line.
In claim 7,
In the first direction, a first width of the first subregion and the third subregion is wider than a second width of the second subregion and the fourth subregion.
In claim 8,
A difference between the first width and the second width is substantially equal to a width of the data line.
In claim 9,
A distance between the data lines and outer edges of the two subregions overlapping the data lines in the first direction on a plane is equal to or greater than a width of the data lines.
In claim 10,
A distance between the data lines and the outer edges of the two subregions overlapping the data lines in the first direction on a plane is about 5 μm or more.
In claim 11,
a sustain voltage line positioned on the same layer as the gate line and extending in parallel with the gate line;
a storage electrode extending from the storage voltage line in a direction parallel to the data line; and
a color filter positioned between the data line and the pixel electrode;
The color filter includes a first color filter and a second color filter that transmit light of different wavelengths,
The first color filter and the second color filter overlap each other on the storage electrode.
a gate line positioned on the substrate and extending in a first direction and a data line extending in a second direction; and
a plurality of pixel electrodes positioned on the substrate, electrically connected to the gate line and the data line, each pixel electrode including four subregions;
the pixel electrode positioned on the left side of the data line and the pixel electrode positioned on the right side of the data line in the second direction are alternately electrically connected to the data line;
the pixel electrode positioned on the left side of the data line and the pixel electrode positioned on the right side of the data line in the second direction alternately overlap the data line;
of the four subregions of the pixel electrode, two subregions adjacent to the data line and positioned above and below the data line in a direction in which the data line is extended overlap the data line;
of the four subregions of the pixel electrode, the remaining two subregions excluding the two subregions do not overlap the data line;
An area of the two subregions overlapping the data line is greater than an area of the remaining two subregions not overlapping the data line.
In claim 13,
In the first direction, a first width of the two subregions overlapping the data line is wider than a second width of the remaining two subregions not overlapping the data line.
15. In claim 14,
A difference between the first width and the second width is substantially equal to a width of the data line.
In claim 15,
A distance between the data lines and outer edges of the two subregions overlapping the data lines in the first direction on a plane is equal to or greater than a width of the data lines.
17. In claim 16,
A distance between the data lines and the outer edges of the two subregions overlapping the data lines in the first direction on a plane is about 5 μm or more.
In claim 13,
a sustain voltage line positioned on the same layer as the gate line and extending in parallel with the gate line;
a storage electrode extending from the storage voltage line in a direction parallel to the data line; and
a color filter positioned between the data line and the pixel electrode;
The color filter includes a first color filter and a second color filter that transmit light of different wavelengths,
The first color filter and the second color filter overlap each other on the storage electrode.
a gate line positioned on the substrate and extending in a first direction and a data line extending in a second direction; and
a plurality of pixel electrodes positioned on the substrate, electrically connected to the gate line and the data line, each pixel electrode including four subregions;
In the second direction, the data line is electrically connected to the pixel electrode positioned on one side of the data line;
the data line overlaps two subregions adjacent to the data line and positioned above and below the data line among the four subregions of the pixel electrode positioned on the one side;
of the four subregions of the pixel electrode, the remaining two subregions excluding the two subregions do not overlap the data line;
An area of the two subregions overlapping the data line is greater than an area of the remaining two subregions not overlapping the data line.
In claim 13,
In the first direction, a first width of the two subregions overlapping the data line is wider than a second width of the other two subregions not overlapping the data line;
A difference between the first width and the second width is substantially equal to a width of the data line.

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