KR20060130385A - Liquid crystal display - Google Patents

Abstract

The present invention relates to a liquid crystal display device which prevents touch failure and gravity failure by forming a closed structure between a column spacer formed on an upper plate and a protrusion formed on a lower plate. A plurality of gate lines and data lines intersecting each other on the first substrate and defining pixel regions, and column spacers corresponding to at least a plurality of gate lines on the second substrate; And a liquid crystal layer filled between the first and second substrates and a first protrusion formed on the first substrate corresponding to the boundary of the column spacer.

Description

Liquid crystal display device

1 is an exploded perspective view showing a general liquid crystal display device

2 is a flowchart of a manufacturing method of a liquid crystal injection type liquid crystal display device.

3 is a flowchart of a manufacturing method of a liquid crystal drop type liquid crystal display device;

4A and 4B are a plan view and a cross-sectional view showing a touch failure

5 is a cross-sectional view of a liquid crystal display device in which gravity failure occurs.

6 is a plan view illustrating an upper substrate of a liquid crystal display according to a first exemplary embodiment of the present invention.

7 is a plan view illustrating a lower substrate of a liquid crystal display according to a first exemplary embodiment of the present invention.

8A and 8B are cross-sectional views illustrating the application of a contact stress and a restoration thereof after the liquid crystal display according to the first embodiment of the present invention.

9A and 9B are cross-sectional views illustrating room temperature and high temperature of a liquid crystal display according to a first exemplary embodiment of the present invention.

10 is a schematic cross-sectional view of a liquid crystal display according to a second embodiment of the present invention.

11 is a plan view illustrating the column spacer corresponding protrusion of the liquid crystal display according to the second exemplary embodiment of the present invention.

12 is a plan view showing a liquid crystal display device of one embodiment of the second embodiment of the present invention.

FIG. 13 is a cross-sectional view taken along line II-II 'of FIG.

FIG. 14 is a plan view showing an embodiment of a second embodiment of the present invention shown in FIG. 12 as a color filter array constructed on an upper substrate;

15 is a plan view showing a liquid crystal display device according to another embodiment of the second embodiment of the present invention.

16 is a cross-sectional view taken along line III-III ′ of FIG. 15.

FIG. 17 is a plan view showing another form of the second embodiment of the present invention of FIG. 12 as a color filter array constructed on an upper substrate;

18 is a plan view showing a modification structure of a color filter array constructed on an upper substrate of another embodiment of the second embodiment of the present invention;

19 is a plan view showing a liquid crystal display device according to still another embodiment of the second embodiment of the present invention.

20 is a cross-sectional view taken along line IV-IV 'of FIG.

21 is a plan view showing another embodiment of the second embodiment of the present invention as a color filter array constructed on an upper substrate;

22 is a schematic cross-sectional view showing a liquid crystal display device according to a third embodiment of the present invention.

FIG. 23 is a plan view illustrating the column spacer of FIG. 22 and the protrusions corresponding thereto. FIG.

24 is a plan view showing a lower substrate of the liquid crystal display device of one embodiment of the third embodiment of the present invention.

25 is a plan view showing an upper substrate of a liquid crystal display device of one embodiment of the third embodiment of the present invention.

26 is a plan view showing a state in which upper and lower substrates of the liquid crystal display device of one embodiment of the present invention are bonded together;

FIG. 27 is a cross-sectional view taken along the line VV ′ in FIG. 26. FIG.

FIG. 28 is a cross-sectional view taken along the line VI-VI 'of FIG.

29 is a plan view showing a lower substrate of a liquid crystal display device according to another embodiment of the third embodiment of the present invention.

30 is a plan view showing an upper substrate of a liquid crystal display device according to another embodiment of the third embodiment of the present invention.

31 is a plan view showing a state in which upper and lower substrates of the liquid crystal display device of one embodiment of the present invention are bonded together;

32 is a cross-sectional view taken along the line VII-VII 'of FIG. 31;

FIG. 33 is a cross-sectional view taken along the line VII-VII 'of FIG. 31;

* Description of symbols on the main parts of the drawings *

100: upper substrate 102: black matrix layer

103: color filter layer 110: column spacer

200: lower substrate 202: gate line

202: gate electrode 203: data line

203a: source electrode 203b: drain electrode

205: pixel electrode 210a: first projection

210b: second projection 300: upper substrate

301: first substrate 302: black matrix layer

303: color filter layer 425: redundancy pattern

310, 320, 330, 340, 350: column spacer

400: lower substrate 402: gate line

403 data line 405 pixel electrode

406: gate insulating film

410, 411, 415, 420, 430, 431, 435: projection

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device in which touch defects and gravity defects are prevented by forming a closed structure between a column spacer formed on an upper plate and a protrusion formed on a lower plate.

As the information society develops, the demand for display devices is increasing in various forms, and in recent years, liquid crystal display devices (LCDs), plasma display panels (PDPs), electro luminescent displays (ELDs), and vacuum fluorescence (VFDs) have been developed. Various flat panel display devices such as displays have been studied, and some of them are already used as display devices in various devices.

Among them, LCD is the most widely used as the substitute for CRT (Cathode Ray Tube) for mobile image display device because of its excellent image quality, light weight, thinness, and low power consumption. In addition to the use of the present invention has been developed in various ways such as a television and a computer monitor for receiving and displaying broadcast signals.

In order to use such a liquid crystal display as a general screen display device in various parts, it is a matter of how high quality images such as high definition, high brightness and large area can be realized while maintaining the characteristics of light weight, thinness and low power consumption. Can be.

Hereinafter, a conventional liquid crystal display device and a spacer holding a cell gap of the liquid crystal display device will be described with reference to the accompanying drawings.

1 is an exploded perspective view showing a general liquid crystal display.

A general liquid crystal display device, as shown in FIG. 1, is injected between a first substrate 1 and a second substrate 2 bonded to each other with a predetermined space, and between the first substrate 1 and the second substrate 2. It consists of the liquid crystal layer 3.

In more detail, the first substrate 1 may have a plurality of gate lines 4 in one direction and constant in a direction perpendicular to the gate lines 4 at regular intervals to define the pixel region P. FIG. A plurality of data lines 5 are arranged at intervals. In addition, a pixel electrode 6 is formed in each pixel region P, and a thin film transistor T is formed at a portion where the gate line 4 and the data line 5 cross each other, so that the thin film transistor is formed. The data signal of the data line is applied to each pixel electrode according to the signal of the gate line.

In addition, a black matrix layer 7 is formed on the second substrate 2 to block light in portions other than the pixel region P, and portions R corresponding to the respective pixel regions are formed to express colors. , G, B color filter layers 8 are formed, and a common electrode 9 for realizing an image is formed on the color filter layers 8.

In the liquid crystal display as described above, the liquid crystal layer 3 formed between the first and second substrates is aligned by an electric field between the pixel electrode 6 and the common electrode 9, and the liquid crystal layer 3 of the liquid crystal layer 3 is aligned. The amount of light passing through the liquid crystal layer 3 can be adjusted according to the degree of alignment to express the image.

Such a liquid crystal display device is called a twisted nematic (TN) mode liquid crystal display device, and the TN mode liquid crystal display device has a disadvantage of having a narrow viewing angle and an in-plane switching (IPS) mode for overcoming the disadvantages of the TN mode. Liquid crystal display devices have been developed.

In the IPS mode liquid crystal display, a pixel electrode and a common electrode are formed parallel to each other at a predetermined distance in a pixel area of the first substrate so that a lateral electric field (horizontal electric field) is generated between the pixel electrode and the common electrode and the lateral electric field is generated. This is to align the liquid crystal layer.

Hereinafter, the manufacturing method of the conventional liquid crystal display device will be described.

The manufacturing method of a general liquid crystal display device can be classified into a liquid crystal injection method manufacturing method and a liquid crystal drop method manufacturing method according to the method of forming a liquid crystal layer between the first and second substrates.

First, the manufacturing method of the liquid crystal display device of the liquid crystal injection method is as follows.

2 is a flowchart of a method of manufacturing a liquid crystal display device of a general liquid crystal injection method.

Liquid crystal displays are largely classified into an array process, a cell process, a module process, and the like.

In the array process, as described above, a TFT array including a gate line and a data line, a pixel electrode, and a thin film transistor is formed on the first substrate, and a black matrix layer, a color filter layer, a common electrode, etc. are formed on the second substrate. It is a process of forming the color filter array provided with.

In this case, the array process does not form one liquid crystal panel on one substrate, but designs a plurality of liquid crystal panels on one large glass substrate to form a TFT array and a color filter array in each liquid crystal panel region.

 In this way, the TFT substrate on which the TFT array is formed and the color filter substrate on which the color filter array is formed are moved to the cell processing line.

Subsequently, an alignment process (rubbing process) S10 is applied to apply the alignment material on the TFT substrate and the color filter substrate and to make the liquid crystal molecules have uniform directionality.

Here, the alignment step (S10) proceeds in order of cleaning before the alignment film coating, alignment film printing, alignment film firing, alignment film inspection, rubbing process.

Subsequently, the TFT substrate and the color filter substrate are cleaned (S20), respectively.

Further, a ball spacer for maintaining a constant cell gap on the TFT substrate or the color filter substrate is spread (S30), and the two substrates are bonded to the outer portion of each liquid crystal panel region. Form a seal pattern (seal pattern) for (S40). At this time, the seal pattern is formed to have a liquid crystal injection hole pattern for injecting liquid crystal.

Here, the ball spacer is formed of plastic balls or elastic plastic fine particles.

The two substrates are bonded together to face the TFT substrate and the color filter substrate so that the seal patterns face each other, and the seal pattern is cured (S50).

Thereafter, the bonded and cured TFT substrate and the color filter substrate are cut and processed for each unit liquid crystal panel region (S60) to produce a unit liquid crystal panel having a predetermined size.

Thereafter, the liquid crystal is injected through the liquid crystal injection hole of each unit liquid crystal panel, and after completion of the injection, the liquid crystal injection hole is sealed (S70) to form a liquid crystal layer. The liquid crystal display device is manufactured by performing external appearance and electrical defect inspection (S80) of each unit liquid crystal panel.

Here, the liquid crystal injection process will be briefly described as follows.

First, the container containing the liquid crystal material to be injected and the liquid crystal panel to inject the liquid crystal are placed in the chamber, and the pressure in the chamber is maintained in a vacuum state to remove moisture from the liquid crystal material or the inner wall of the container. Then, bubbles are de-included and the inner space of the liquid crystal panel is vacuumed.

The liquid crystal injection hole of the liquid crystal panel is immersed in or contacted with a container containing a liquid crystal material in a desired vacuum state, and then the pressure inside the chamber is changed from a vacuum state to an atmospheric pressure state, and the pressure inside the liquid crystal panel and the pressure of the chamber. By the difference, the liquid crystal material is injected into the liquid crystal panel through the liquid crystal injection hole.

The manufacturing method of the liquid crystal display of the liquid crystal injection method has the following problems.

First, after cutting into a unit panel, the liquid crystal injection hole is immersed in the liquid crystal liquid by maintaining the vacuum state between the two substrates, so that the liquid crystal injection takes a lot of time, the productivity is reduced.

Second, in the case of manufacturing a large-area liquid crystal display device, when the liquid crystal is injected by the liquid crystal injection method, the liquid crystal is not completely injected into the panel, which causes a defect.

Third, since the process is complicated and time-consuming as described above, several liquid crystal injection equipment is required, which requires a lot of space.

Accordingly, in order to overcome the problems of the liquid crystal injection method, a method of manufacturing a liquid crystal drop type liquid crystal display device in which a liquid crystal is dropped on one of two substrates and then the two substrates are bonded to each other has been developed.

3 is a flowchart of a method of manufacturing a liquid crystal drop type liquid crystal display device.

That is, the liquid crystal display device manufacturing method of the liquid crystal dropping method is a method of dropping an appropriate amount of liquid crystal onto any one of the two substrates before bonding the two substrates, and then joining the two substrates together.

Therefore, when the ball spacer is used to maintain the cell gap as in the liquid crystal injection method, when the dropped liquid crystal spreads, the ball spacer is moved in the liquid crystal spreading direction and the spacer is pushed to one side, thereby making it impossible to maintain the accurate cell gap.

Therefore, the liquid crystal dropping method should use a fixed spacer (column spacer or patterned spacer) in which the spacer is fixed to the substrate without using the ball spacer.

That is, as shown in FIG. 3, in the array process, a black matrix layer, a color filter layer, and a common electrode are formed on a color filter substrate, and a photosensitive resin is formed on the common electrode and selectively removed to form column spacers on the black matrix layer. do. In addition, the column spacer may be formed by a photo process or an ink-jet process.

Then, an alignment film is applied to the entire TFT substrate including the column spacer and the color filter substrate, and the alignment film is rubbed.

As described above, the TFT substrate and the color filter substrate on which the alignment process is completed are cleaned (S101), and then, a liquid crystal is dropped into a predetermined region on one of the TFT substrate and the color filter substrate (S102), and each liquid crystal of the remaining substrates. A seal pattern is formed at an outer portion of the panel region by using a dispensing apparatus (S103).

At this time, the liquid crystal may also be dropped on one of the two substrates and a seal pattern may be formed.

Then, the substrate on which the liquid crystal is not dropped is inverted (inverted to face each other) (S104), the TFT substrate and the color filter substrate are pressed together, and the seal pattern is cured (S105).

Subsequently, the bonded substrate is cut and processed for each unit liquid crystal panel (S106).

In addition, the liquid crystal display device may be manufactured by performing the external appearance and electrical defect inspection (S107) of the processed unit liquid crystal panel.

In the manufacturing method of such a liquid crystal dropping method, a column spacer is formed on a color filter substrate, a liquid crystal is dripped on a TFT substrate, and two board | substrates are joined together, and a panel is formed.

At this time, the column spacer is formed by being fixed to the color filter substrate and is in contact with the TFT substrate. The contact portion of the TFT substrate is formed by giving a predetermined height on the color filter substrate, corresponding to any single wiring of the gate line or the data line.

On the other hand, in the liquid crystal display device manufactured by the liquid crystal dropping method, since accurate control of the amount of liquid crystal is difficult, display defects are observed like a gravity defect or a touch defect.

Hereinafter, the causes and definitions of gravity failure and touch failure will be described.

Gravity failure refers to a phenomenon in which a liquid crystal is attracted to the side closer to the ground when the panel is erected, and this part expands bulging in the high temperature state due to the property that the liquid crystal expands as the liquid crystal rises to a high temperature.

Touch unevenness refers to a phenomenon in which, when the surface of the liquid crystal panel is scraped down by a hand or a pen in a predetermined direction, the portion passed by the hand or pen is not restored by the frictional force and the liquid crystal is dispersed in the touched portion. At this time, the non-restored portion of the liquid crystal does not collect, the light leakage defect appears in the black state. This is because a shift phenomenon occurs in a predetermined direction between the upper and lower substrates during touch, because the friction force between the substrate and the substrate in contact with the column spacer does not return to the original state.

The defects described above are not generated by independent elements but are correlated with each other. Gravity defects and touch unevenness are trade-off relations with the liquid crystal dropping amount, so that the liquid crystal dropping amount cannot be adjusted in the direction of improving only one defect, and the liquid crystal dropping amount is on the line where the two defects are adjusted to an appropriate level. You will have to decide.

Therefore, in this way, in the method manufactured by the liquid crystal dropping method, the point which calculates the appropriate amount of liquid crystal filled in a liquid crystal panel in order to prevent display defect by touch failure or a gravity failure is key.

4A and 4B are a plan view and a sectional view showing a state where a touch spot occurs.

As shown in FIG. 4A, when the liquid crystal panel 10 is swung past while being touched by a finger in a predetermined direction, the upper substrate of the liquid crystal panel is shifted by a predetermined interval in the direction where the finger passes, as shown in FIG. 4B.

At this time, the columnar columnar spacers are in contact with the upper and lower substrates, and the contact area is large and the friction force generated between the column spacers and the opposing substrate is large, so that the liquid crystal between the column spacers does not easily return to the original state. As a result, stains appearing to be opaque continuously are observed. In addition, when a finger passes in a predetermined direction, as shown in Fig. 4B, liquid crystals are collected at the last contact portion, and a shape in which the portion is bulged is formed. In this case, the areas where the liquid crystals gather and protrude bulge have a higher cell gap h1 than the cell gap h2 of other sites defined by the height of the column spacer, resulting in uneven alignment of the liquid crystals, resulting in light leakage. Therefore, there arises a problem of uneven brightness.

5 is a cross-sectional view of a liquid crystal display device in which gravity failure occurs.

As shown in FIG. 5, when the upper and lower sides of the liquid crystal panel 10 are cut off, the column spacer 30 positioned at the edge of the lower portion does not support the upper and lower substrates 2 and 1 due to the expansion force of the liquid crystal. A phenomenon that falls off the substrate 1 occurs. In particular, as shown in Figs. 5 and 6, when the liquid crystal panel 10 is upright in the state in which the liquid crystal is dripped excessively, the phenomenon that the liquid crystal flows toward the ground close to the ground under the influence of gravity becomes severe.

Here, a seal pattern 25 is formed at the edge of the liquid crystal panel 10 to bond the upper and lower substrates 2 and 1, and the liquid crystal layer filled with the dropped liquid crystal between the upper and lower substrates 2 and 1. (3) is formed. The liquid crystal layer 3 has a different cell gap between a region where gravity failure occurs and a region where gravity failure does not occur.

The conventional liquid crystal display as described above has the following problems.

In the conventional liquid crystal display device manufactured by the liquid crystal dropping, it is difficult to control the same appropriate amount at the time of buried, and therefore it is difficult to drop the appropriate amount into the liquid crystal panel. In this case, when a liquid crystal exceeding an appropriate amount is filled, an excessive amount of liquid crystal is struck down at a high temperature, thermal expansion occurs, and a poor gravity phenomenon in which the lower end of the liquid crystal panel is bulged is observed. After a shift occurs between the upper and lower substrates during touch, a touch failure in which light leakage appears until it is returned to the original state is observed.

The present invention has been made to solve the above problems to provide a liquid crystal display device that prevents the touch failure and gravity failure by forming a closed structure of the column spacer formed on the upper plate and the projection formed on the lower plate, There is a purpose.

In order to achieve the above object, a liquid crystal display of the present invention includes a first substrate and a second substrate facing each other, and a plurality of gate lines and data lines formed on the first substrate to cross each other to define a pixel region. And a column spacer formed corresponding to at least a plurality of gate lines on the second substrate, a first protrusion formed corresponding to a boundary of the column spacer on the first substrate, and between the first substrate and the second substrate. It is characterized by including a liquid crystal layer filled in.

The column spacer is formed in plural spaced apart at intervals less than or equal to the critical dimension of its lower surface.

The first protrusions are formed in a plurality of spaced apart at intervals equal to or less than a critical dimension of their lower surface.

The column spacer is formed corresponding to each of the plurality of gate lines.

The column spacer is formed to correspond to each of the plurality of gate lines and data lines.

The column spacer corresponds to each of the plurality of gate lines, and is formed to correspond to an optional predetermined portion of each of the plurality of data lines.

The column spacer corresponds to each of the plurality of gate lines, and is formed to correspond to each of n (n is a natural number of two or more) data lines of the plurality of data lines.

The column spacer corresponds to each of the plurality of gate lines and is formed corresponding to a predetermined portion of n data lines (n is a natural number of two or more) among the plurality of data lines.

The semiconductor device may further include a second protrusion formed to correspond to a central portion of the column spacer formed to correspond to the gate line.

The first protrusion partially overlaps the column spacer.

The first protrusion is formed to be in contact with a boundary of the column spacer or spaced apart from the boundary by a predetermined distance.

The column spacer is made of an organic material.

A thin film transistor is further formed at an intersection of the gate line and the data line on the first substrate, and a pixel electrode is further formed in the pixel region.

The thin film transistor may include a gate electrode protruding from the gate line, a source electrode protruding in a 'U' shape from the data line, a drain electrode partially entering the 'U' shape source electrode, and the gate electrode; And a semiconductor layer formed in contact with a lower side of the source electrode / drain electrode between the layers between the source electrode and the drain electrode.

The 'U' shaped source electrode is formed in the gate line direction.

The 'U' shaped source electrode is formed in the data line direction.

The plurality of protrusions are formed in a semiconductor layer pattern formed on the same layer as the semiconductor layer.

A source / drain electrode pattern formed on the same layer as the source / drain electrode is further formed on the semiconductor layer pattern.

A redundancy pattern is further formed at the boundary of each pixel area.

The redundancy pattern has a 'c' shape with an open upper portion of the gate line.

The black matrix layer formed on the gate line and the data line and the color filter layer formed on the second substrate are further formed on the second substrate.

In addition, the liquid crystal display device of the present invention for achieving the same object includes a first substrate and a second substrate facing each other, a gate line and a data line formed on the first substrate to cross each other to define a pixel region, A plurality of first column spacers disposed in correspondence with the gate line on the second substrate, the plurality of first column spacers corresponding to the gate lines and the plurality of second column spacers corresponding to the data lines; It is another feature that it comprises a plurality of projections formed on the upper and lower boundaries of the plurality of first column spacer on the first substrate and the liquid crystal layer filled between the first substrate and the second substrate.

The plurality of first column spacers are disposed in a linear shape corresponding to the gate lines, and the plurality of second column spacers are disposed in a linear shape corresponding to the data lines.

The plurality of protrusions are disposed in parallel with the first column spacers.

The plurality of first column spacers and the plurality of protrusions are formed in the gate line line width, and the plurality of second column spacers are formed in the data line line width.

In addition, the liquid crystal display of the present invention for achieving the same object is a first substrate and a second substrate facing each other, and a plurality of gate lines and data lines formed on the first substrate to cross each other to define a pixel region And a column spacer formed on at least one of the plurality of gate lines on the second substrate, a protrusion formed on the first substrate corresponding to a boundary of the column spacer, and filled between the first substrate and the second substrate. And a liquid crystal layer.

The protrusion partially overlaps with the column spacer.

A redundancy pattern is further formed at the boundary of the pixel region.

The redundancy pattern has a 'c' shape with an open upper portion of the gate line.

The column spacer is formed corresponding to each of the plurality of gate lines.

The column spacer is formed to correspond to each of the plurality of gate lines and data lines.

The column spacer corresponds to each of the plurality of gate lines, and is formed to correspond to an optional predetermined portion of each of the plurality of data lines.

The column spacer corresponds to each of the plurality of gate lines, and is formed to correspond to each of n (n is a natural number of two or more) data lines of the plurality of data lines.

The column spacer corresponds to each of the plurality of gate lines and is formed corresponding to a predetermined portion of n data lines (n is a natural number of two or more) among the plurality of data lines.

In addition, the liquid crystal display of the present invention for achieving the same object is a first substrate and a second substrate facing each other, and a plurality of gate lines and data lines formed on the first substrate to cross each other to define a pixel region A column spacer formed at least on the second substrate in correspondence with the gate line, a first protrusion formed on the first substrate in correspondence with a boundary of the column spacer, and a center of the column spacer on the first substrate; In addition, a second protrusion formed to be spaced apart from the first protrusion and a liquid crystal layer filled between the first substrate and the second substrate has another feature.

A redundancy pattern is further formed at the boundary of the pixel region.

The redundancy pattern has a 'c' shape with an open upper portion of the gate line.

The column spacer is formed corresponding to each of the plurality of gate lines.

The column spacer is formed to correspond to each of the plurality of gate lines and data lines.

The column spacer corresponds to each of the plurality of gate lines, and is formed to correspond to an optional predetermined portion of each of the plurality of data lines.

The column spacer corresponds to each of the plurality of gate lines, and is formed to correspond to each of n (n is a natural number of two or more) data lines of the plurality of data lines.

The column spacer corresponds to each of the plurality of gate lines and is formed corresponding to a predetermined portion of n data lines (n is a natural number of two or more) among the plurality of data lines.

The liquid crystal display of the present invention described below includes an upper substrate and a lower substrate facing each other, a plurality of gate lines and data lines formed on the lower substrate to cross each other to define a pixel region, and on the upper substrate. A liquid crystal layer filled between a column spacer formed on at least a plurality of gate lines among the plurality of gate lines and data lines, a first protrusion formed on the lower substrate corresponding to a boundary of the column spacer, and the upper and lower substrates; It is made, including.

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

6 is a plan view illustrating an upper substrate of a liquid crystal display according to a first embodiment of the present invention, and FIG. 7 is a plan view illustrating a lower substrate of a liquid crystal display according to a first embodiment of the present invention.

6 and 7, the liquid crystal display according to the first exemplary embodiment of the present invention is formed to face each other on the upper substrate 100 and the lower substrate 200 facing each other and on the lower substrate 200. A plurality of gate lines 202 and data lines 203 defining a pixel area, and the gate lines 202 and the data are disposed on the upper substrate 100 at intervals smaller than their lower formation surface thresholds; A plurality of column spacers 110 formed corresponding to the line 203, protrusions 210 formed corresponding to boundary portions of the column spacers 110 formed corresponding to the gate lines on the lower substrate 200, and the It includes a liquid crystal layer (not shown) filled between the upper and lower substrates (100, 200). Here, the protrusion 210 is formed by being divided into a plurality of first protrusions 210a and a plurality of second protrusions 210b corresponding to upper and lower boundary portions of the plurality of column spacers 110.

The column spacers 110 are spaced apart from each other by a gap below a critical dimension of the lower surface of the lower surface, so that the column spacers 110 may be formed to have a dense and dense density. In this case, each of the column spacers 110 may have the same size and may be formed within the line widths of the gate line 202 and the data line 203. The plurality of column spacers 110 may be arranged in a linear shape parallel to each line in correspondence with the gate line and the data line, and likewise, the plurality of protrusions 210 may be formed on the column spacers 110 formed on the gate line. Are arranged parallel to

Similarly, the first and second protrusions 210a and 210b may also be formed in plural, spaced apart from each other by a gap below a critical dimension of their lower surface having one protrusion, and thus, the first and second protrusions 210a and The 210b is formed to have a relatively small height and a small lower formation surface than the column spacer 110.

Here, a plurality of first protrusions 210a and second protrusions 210b are formed on upper and lower boundary lines of the plurality of column spacers 110 correspondingly formed on the gate line 202, and thus, on the gate line 202. Through the structure in which the column spacer 110, the first protrusion 210a, and the second protrusion 210b formed in contact with each other at the boundary portion thereof support the liquid crystal flowing down from the upper side to the lower side at a high temperature in the liquid crystal panel. The column spacers and the protrusions 210 above and below serve as obstacles. Therefore, it is possible to prevent the liquid crystal from sagging downwards to prevent the failure of gravity.

The column spacer 110 may be formed on the data line and correspond to only the gate line. Comparing the case of forming the column spacer on the data line with the case of not forming the column spacer, the structure of forming the column spacer 110 corresponding to the data line forms an isolation structure for each unit pixel to limit the liquid crystal flow. This was expected to be large and the liquid-crystal fall prevention effect was excellent.

Meanwhile, an array formed on the upper substrate 100 and the lower substrate 200 of the liquid crystal display according to the first embodiment of the present invention will be described in detail with reference to FIGS. 6 and 7.

As illustrated in FIG. 6, a black matrix layer 102 covering a portion excluding the pixel region and a color filter layer 103 formed corresponding to the pixel region are formed on the upper substrate 100 of the present invention. The color filter layer 103 may be formed such that color filters of each of R, G, and B colors are sequentially disposed on a stripe parallel to the data line 203 including the pixel area.

A common electrode (not shown) is further formed on the entire surface of the upper substrate 100 including the black matrix layer 102 and the color filter layer 103 when the liquid crystal display is formed in the TN mode. When formed, an overcoat layer (not shown) is further formed.

As shown in FIG. 7, the gate line 202 and the data line 203 and the gate line 202 and the data line 203 of the gate substrate 202 and the data line 203 which cross the vertically and define a pixel area on the lower substrate 200 of the present invention. The thin film transistor TFT formed at the intersection portion and the pixel electrode 205 formed in the pixel region are formed.

As illustrated in FIG. 7, the pixel electrode 205 is formed in the pixel region, and in some cases, when the liquid crystal display device to be implemented is an IPS mode, The common electrodes are alternately formed.

The thin film transistor may include a gate electrode 202a protruding from the gate line, a source electrode 203a protruding from the data line to form a 'U' pattern, and a 'U' pattern of the source electrode 203a. It is formed to include a drain electrode 203b spaced apart from the predetermined interval and the electrode portion is introduced into the 'U' pattern. Here, as shown in the source electrode 203a, the shape of the 'U'-shaped pattern is formed in parallel with the gate line 202 direction, or in parallel with the data line 203. As shown, the 'U'-shaped pattern is parallel to the gate line 202, the liquid crystal will flow naturally during the filling process after the liquid crystal dropping.

A gate insulating film (not shown) and a semiconductor layer (not shown) are formed between the gate electrode 202a and the source electrode 203a / drain electrode 203b. The semiconductor layer is the gate electrode 202a. ) Is formed below the source electrode 203a and the drain electrode 203b so as to contact the source electrode 203a and the drain electrode 203b. The first and second protrusions 210a and 210b may be formed of a single layer of a semiconductor layer pattern of the same layer as the semiconductor layer, or may be a laminate of a semiconductor layer pattern and a source / drain electrode pattern of the same layer as the source / drain electrode. Is done.

On the other hand, the gate line 202 has a portion that passes through the data line 203 is thinner than the other portion. This is to reduce the parasitic capacitance generated at the intersection of the gate line 202 and the data line 203 by reducing the overlap area of the wiring at the intersection of the gate line 202 and the data line 203.

8A and 8B are cross-sectional views illustrating a case where a contact stress is applied and a restoration after the liquid crystal display according to the first exemplary embodiment of the present invention.

As shown in FIG. 8A, the liquid crystal display according to the first exemplary embodiment of the present invention has a column spacer 110 disposed between the first and second protrusions 210a and 210b when a contact stress applied in one direction by a touch by a hand or the like is applied. The upper substrate 100 including) is pushed to the lower substrate 200 occurs.

As shown in FIG. 8B, since the column spacer 110 is in contact with one of the protrusions of the first and second protrusions 210a and 210b having a smaller size (forming surface and height), the column spacer 110 is pushed when the contact stress is applied. Even if a phenomenon occurs, the maximum contact area between the column spacer 110 and the protrusions 210a and 210b may be limited to the upper surface of any one of the protrusions, and the small distance between the column spacer 110 and the protrusions 210a and 210b may be reduced. By the contact surface, the frictional force at the time of contact stress is small, and restoration to an original state is easily performed. That is, the upper substrate 100 pushed at the touch is easily returned to its original state.

As described above, the liquid crystal display according to the first exemplary embodiment of the present invention can reduce the contact area of the column spacer maintaining the cell gap while forming the entire closed structure for each pixel. As shown in FIG. 8A, a plurality of column spacers 110 may be formed very densely on the upper substrate 100 having a closed structure, and protrusions 210a and 210b of an inorganic material may be formed on the lower substrate 200 opposite thereto. By densely forming, when the upper and lower substrates 100 and 200 are bonded together, the protrusions 210a and 210b support the column spacer 110 up and down.

The column spacer 110 may be formed of an organic material including a photo acryl, a photoinitiator, and a binder, and the protrusion 210 may be a single layer of the semiconductor layer pattern or may be disposed on and above the semiconductor layer pattern. It consists of an inorganic material which consists of a laminated body of source / drain electrode patterns.

The structure according to the first embodiment of the present invention is reduced by using projections made of inorganic material patterns protruding from the lower substrate, while the general column spacer has a contact area between the opposing substrate and the upper area of the column spacer. By reducing the area so that the restoration to the original state when the touch is reduced by reducing the frictional force, it can be an efficient structure for improving the contact stain by the application of external contact stress.

9A and 9B are cross-sectional views illustrating a room temperature and a high temperature of a liquid crystal display according to a first exemplary embodiment of the present invention.

The structure of the liquid crystal display according to the first exemplary embodiment of the present invention may limit the liquid crystal flow in the gravity direction. As shown in FIG. 9A, the column spacer 110 is densely formed on the upper substrate 100, and the protrusion corresponding to the upper portion of the gate line 202 of the lower substrate 200 corresponds to the boundary of the column spacer 110. Since the 210a and 210b are densely formed, the structure becomes completely closed and the liquid crystal flow is restricted, and as shown in FIG. 9B, even when the cell gap is increased due to thermal expansion of the liquid crystal in a high temperature environment, the liquid crystal is gravityd. It can restrict the flow in the direction.

As described above, the liquid crystal display according to the first exemplary embodiment of the present invention adopts a projection structure on the lower substrate and forms the arrangement so as to surround the boundary of the column spacer formed on the gate line and / or the data line for each pixel. As a result, it is expected that the problem of the amount of liquid crystal, which has been strictly limited by inducing an isolated structure for each pixel, can be solved. That is, even if the amount of liquid crystal is slightly less than that of the appropriate cell gap, the column spacer and the counter substrate are in contact with the upper area of the protrusion smaller than the upper area of the column spacer. This is because, although the cell gap increases due to the liquid crystal thermal expansion, the flow of the liquid crystal is very limited due to the densely formed pattern on the upper and lower substrates.

Hereinafter, a liquid crystal display according to another exemplary embodiment will be described. In the embodiments described below, the column spacers and the projections are formed in a pattern corresponding to the wiring of the gate line and the data line, without forming a plurality of dense patterns.

Second Embodiment

10 is a schematic cross-sectional view of a liquid crystal display according to a second exemplary embodiment of the present invention, and FIG. 11 is a plan view illustrating column spacer corresponding protrusions of the liquid crystal display according to the second exemplary embodiment of the present invention.

10 and 11, the liquid crystal display according to the second exemplary embodiment of the present invention includes an upper substrate 300 and a lower substrate 400 facing each other, and a column spacer formed on the upper substrate 300. 310 and the protrusion 410 formed on the lower substrate 400 and the upper and lower substrates 300 and 400 by overlapping a portion of the column spacer 310 to correspond to the boundary of the column spacer 310. It comprises a liquid crystal layer (not shown) filled in.

In the liquid crystal display according to the second exemplary embodiment, when the upper and lower substrates 300 and 400 face each other, the protrusion 410 is in contact with a predetermined portion of the boundary portion of the column spacer 310.

The column spacer 310 may be formed to correspond to a gate line or data line formed on a boundary of the pixel area, that is, the lower substrate 400. The column spacer 310 may have various shapes such as 'ㅁ', 'ㄱ', 'b', 'ㅛ', 'ㅠ' in a single pixel or a plurality of pixel units.

Hereinafter, the second embodiment will be described in detail through various forms.

12 is a plan view showing a liquid crystal display device according to one embodiment of the second embodiment of the present invention, FIG. 13 is a sectional view taken along the line II-II 'of FIG. 12, and FIG. 14 is a second embodiment of the present invention shown in FIG. One form of an example is a top view shown by the color filter array comprised on the upper substrate.

12 and 13, the liquid crystal display according to the second exemplary embodiment of the present invention has an upper substrate (see 300 in FIG. 10), a lower substrate 400, and a lower substrate 400 formed to face each other. A column spacer 310 formed on the upper substrate 300 in correspondence with the gate line 402 and the data line 403, and the gate line 402 and the data line 403. And a protrusion 410 formed on the lower substrate corresponding to the boundary of the column spacer 310.

In this case, in the liquid crystal display according to the second exemplary embodiment of the present invention, the column spacers 310 correspond to each of the gate lines 402 and the column spacers 310a and the data lines 403 in the horizontal direction. The column spacers 310b are formed to correspond to each other. The column spacer 310 has a shape of 'ㅁ' in units of one pixel including R, G, and B subpixels, and is formed in a lattice shape when viewed as a whole of the liquid crystal panel.

The second embodiment shows an example of a column spacer 310b that may be formed on the data line 403, and shows a state in which each of the three data lines 403 is formed correspondingly. In addition, a structure in which column spacers are formed for each n (n is a natural number) data lines 403 may be considered. Here, the illustrated example is based on one pixel defined as adjacent R, G, and B subpixels, and as shown in FIG. 14, the column spacers 310 (310a and 310b) are respectively left and right at each corner of the pixel. The gate lines 402 and the data lines 403 are formed to correspond to the adjacent pixels above and below.

Meanwhile, in FIG. 14, the shape of the black matrix layer 302 is further formed near the intersection of the gate line 402 and the data line 403 to cover the thin film transistor on the lower substrate 400. . The shape of the black matrix layer 302 applied in the liquid crystal display of the present invention may be a shape as shown in FIG. 6 (corresponding to the gate line and the data line), or may be as shown in FIG. 14. .

As shown in FIG. 12, when the protrusion of the inner boundary of the column spacer 310a formed at the boundary of the illustrated pixel is 410a and the protrusion of the outer boundary is 410b, the protrusion 410b of the outer boundary is It will correspond to the inner boundary of adjacent pixels (not shown) (see FIG. 14).

As shown in FIG. 13, in the liquid crystal display according to the second exemplary embodiment, the column spacers 310a corresponding to the gate lines 402 may have protrusions formed at both boundary portions of the gate lines 402. 410a and 410b) and partially overlap with each other. In addition, the column spacer 310b formed to correspond to the data line 403 is formed with the protrusions 410a and 410b corresponding to the data line 403 at the center thereof.

Meanwhile, as shown in FIGS. 13 and 14, the upper substrate 300 includes the first substrate 301 and regions except for the pixel region of the first substrate (gate line, data line, gate line, and thin film transistor formation region). And a black matrix layer 302 formed on the substrate, an R, G, and B color filter layer 303 formed corresponding to the pixel region, and a common electrode 304 formed on the entire surface of the first substrate 301.

12 and 13, the lower substrate 400 includes a second substrate 401, a gate line 402 that crosses each other on the second substrate 401, and defines a pixel area, and data. And a thin film transistor formed at an intersection of the line 403, the gate line and the data line, and having a 'U' channel, and a pixel electrode 405 formed in the pixel region.

The thin film transistor may include a gate electrode 202a protruding from the gate line, a source electrode 203a protruding from the data line to form a 'U' pattern, and a 'U' pattern of the source electrode 203a. It is formed to include a drain electrode 203b spaced apart from the predetermined interval and the electrode portion is introduced into the 'U' pattern. The semiconductor layer (not shown) covers an upper side of the gate electrode 202a and is lower than the source electrode 203a and the drain electrode 203b so as to contact the source electrode 203a and the drain electrode 203b. Is formed. Here, as shown in FIG. 13, the first and second protrusions 210a and 210b may be formed of a single layer of the same semiconductor layer pattern as the semiconductor layer, or may be formed of the same layer as the semiconductor layer pattern and the source / drain electrodes. It consists of a laminated body of source / drain electrode patterns.

Here, a gate insulating film 406 is entirely interposed between the gate line 402 and the data line 403, and the interlayer of the gate insulating film and the source / drain electrodes 403a / 403b of the thin film transistor forming region is interposed therebetween. A semiconductor layer (not shown) is interposed therebetween, and a passivation film 408 is interposed between the source / drain electrodes 403a / 403b and the pixel electrode 405.

In this second embodiment, since a completely closed structure is formed in one pixel unit including the R, G, and B subpixels, thereby restricting the flow of liquid crystals, the phenomenon of liquid crystals flowing downward is prevented and gravity failure is prevented. Is improved. In addition, since the protrusions 410 are formed only corresponding to predetermined portions of the boundary portions of the column spacers 310, the area of the portions contacting the column spacers 310 is small, and after the substrate is shifted when the surface of the substrate is touched. Restoration to the original state is easy to prevent a touch failure.

However, in such a second embodiment, since a completely closed structure is formed in one pixel unit including the R, G, and B subpixels, and the flow of liquid crystal is limited, after the dropping process, to the edge of the liquid crystal panel. Since any obstacles may occur in filling the liquid crystal, the following describes an example in which a part of the flow path of the liquid crystal is formed.

FIG. 15 is a plan view showing a liquid crystal display device according to another embodiment of the second embodiment of the present invention, FIG. 16 is a sectional view taken along line III-III ′ of FIG. 15, and FIG. 17 is a second embodiment of the present invention of FIG. 12. Another form of an example is a plan view shown by a color filter array constructed on an upper substrate.

15 and 17, in the liquid crystal display according to another embodiment of the second embodiment, the column spacer 320 is formed to correspond to each gate line 402, and corresponds to every n data lines 403. And is formed by removing the upper portion of the data line 403 so as to have a liquid crystal path in the portion of the data line 403. That is, the column spacer 320 includes a column spacer 320a formed at each gate line and a column spacer 320b formed corresponding to an optional portion of the optional data line 403. In this case, the protrusion 420 is formed corresponding to the boundary of the column spacer 320.

As illustrated in FIG. 17, the column spacer 320 may have a shape of 'a' or 'b' based on one pixel including the R, G, and B subpixels. The shape is formed in a repeating structure. Similarly, the protrusion 420 may be formed to have a predetermined width along the boundary of the column spacer 320.

As described above, in the liquid crystal display according to another embodiment of the second embodiment, the shapes of the column spacers and the protrusions are changed in the first embodiment, and the rest of the structure is the same, and thus description thereof is omitted.

The liquid crystal display device according to another embodiment of the second embodiment is formed corresponding to a predetermined portion of the data line 403, so that liquid crystal flows to adjacent pixels through a path partially formed on the data line 403. . In this case, since the path is formed only on the line of the data line 403, and the column spacer 320a and the protrusion 420 are entirely blocked on the gate line 402, the liquid crystal can be prevented from flowing downward. Will be. In the aspect of poor touch, as in the first embodiment described above, since the column spacer 420 and the protrusion 320 are in contact with each other in a small area, it may be easily restored to the original state due to the reduction of frictional force during touch.

Fig. 18 is a plan view showing a modification structure of a color filter array constituted on an upper substrate according to another embodiment of the second embodiment of the present invention.

FIG. 18 shows that the path formed on the data line 403 is the same position in the form of the second embodiment of the present invention. The column spacer 320 illustrated in FIG. 18 may have a shape of 'ㅛ' in units of one pixel, and when viewed as a whole of the liquid crystal panel, the column spacer 320 is formed in a repeating shape. Also in this structure, the protrusion is formed to correspond to the boundary of the column spacer and overlap a predetermined portion with the column spacer.

As described above, the liquid crystal display of the second embodiment is used as a path by removing a portion of the data line, and the shape is 'B' shape, 'B' shape, 'ㅠ' shape, and 'ㅛ' shape. Various shapes may be possible.

 19 is a plan view showing a liquid crystal display device according to still another embodiment of the second embodiment of the present invention, FIG. 20 is a sectional view taken along line IV-IV 'of FIG. 19, and FIG. 21 is still another embodiment of the second embodiment of the present invention. Another form is a top view which shows the color filter array comprised on the upper substrate.

A liquid crystal display according to still another embodiment of the second exemplary embodiment shown in FIGS. 19 and 21 is formed such that the column spacer 330 is formed only on the gate line 402 line, and the column spacer in the data line 403 direction. And a structure in which the protrusion structure is omitted.

Also in this form, since the column spacer 330 and the protrusion 430 are formed on the gate line 402, when the liquid crystal panel is erected, the arrangement of the gate line 402 located in the horizontal line is arranged. Due to this, the column spacer 330 and the protrusion 430 positioned on the gate line 402 act as obstacles to prevent the flow of the liquid crystal, thereby preventing a gravity failure phenomenon caused by sagging of the liquid crystal in a high temperature environment. do. In this form, the flow path of the liquid crystal is larger than that of the other embodiments of the second embodiment described above, and the path may be more usefully used in the filling process of the liquid crystal after dropping the liquid crystal.

As shown in FIG. 21, in the liquid crystal display according to the second embodiment of the present invention, the column spacer 330 has a '-' shape in units of one pixel including the R, G, and B subpixels. It will have a shape of, and when viewed as a whole of the liquid crystal panel, it will have a structure formed in the column spacer 330 corresponding to every gate line. Similarly, the protrusion 430 may be formed to have a predetermined width along the boundary of the column spacer 330.

Third embodiment

FIG. 22 is a schematic cross-sectional view illustrating a liquid crystal display according to a third exemplary embodiment of the present invention, and FIG. 23 is a plan view illustrating the column spacer of FIG. 22 and protrusions corresponding thereto.

22 and 23, the liquid crystal display according to the third exemplary embodiment of the present invention includes an upper substrate 300 and a lower substrate 400 facing each other, and a column formed on the upper substrate 300. A spacer 340, a first protrusion 411 formed corresponding to the boundary of the column spacer 340, and a second protrusion 411 spaced apart from the first protrusion 411 to correspond to a central portion of the column spacer 310. And a liquid crystal layer (not shown) filled between the protrusion 415 and the upper and lower substrates 300 and 400. In this case, the first and second protrusions 411 and 415 are formed on the lower substrate 400.

Here, as shown in the drawing, the first protrusion 411 is spaced apart from the column spacer 310, but in some cases, the width of the column spacer 310 is increased to increase the width of the first protrusion 411. The column spacer 340 may be formed by overlapping some areas.

The column spacer 310 may be formed to correspond to the gate line 402 or / and the data line 403 formed on the boundary of the pixel area, that is, the lower substrate 400. The column spacer 310 may have various shapes such as 'ㅁ', 'ㄱ', 'b', 'ㅛ', 'ㅠ' in a single pixel or a plurality of pixel units.

As described above, in the liquid crystal display according to the third exemplary embodiment of the present invention, the column spacer 330 has a first protrusion 411 formed at a boundary portion thereof and is formed to correspond to a central portion of the column spacer 330. The inclusion of the projections 415 is different from the above-described second embodiment, so that the same shapes and structures are assigned the same numbers.

Hereinafter, various structures of the liquid crystal display of the third exemplary embodiment of the present invention will be described.

24 is a plan view illustrating a lower substrate of the liquid crystal display according to the third exemplary embodiment of the present invention, and FIG. 25 is a plan view illustrating an upper substrate of the liquid crystal display according to the third exemplary embodiment of the present invention. FIG. 26 is a plan view illustrating a state in which upper and lower substrates of the liquid crystal display device of one embodiment of the present invention are bonded together. FIG. 27 is a cross-sectional view taken along the line V-V 'of FIG. 26, and FIG. 28 is a cross-sectional view taken along the line VI-VI' of FIG. 26.

As shown in FIGS. 24 and 26 to 28, the gate line 402 and the data line 403 cross each other perpendicularly to define a pixel area on the lower substrate 400 of the liquid crystal display according to the third exemplary embodiment of the present invention. ), A thin film transistor (TFT) formed at an intersection of the gate line 402 and the data line 403, the pixel electrode 405 and the gate line 402 and the data line 403 formed in the pixel region. A first projection 411 formed at a boundary of the second projection, a second projection 415 formed corresponding to the first projection 411 at a central portion of the gate line 402, and a first projection formed at a boundary of the pixel region. The redundancy pattern 425 formed in a 'c' shape is partially overlapped with the 411. Here, the open portion of the redundancy pattern is above the gate line 402 on the side where the thin film transistor is formed.

According to the drawing shown in FIG. 2, the pixel electrode 405 is formed in the pixel region. In some cases, when the liquid crystal display device to be implemented is the IPS mode, the pixel electrode and the common electrode are alternately formed in the pixel area.

The thin film transistor may include a gate electrode 402a that protrudes from the gate line 402, a source electrode 403a that protrudes from the data line and is formed in a 'U' pattern, and the ' It is formed to include a drain electrode 403b spaced apart from the U'-shaped pattern by a predetermined interval and a portion of the electrode coming into the 'U'-shaped pattern. A gate insulating film 405 and a semiconductor layer (not shown) are formed between the gate electrode 402a and the source electrode 403a / drain electrode 403b. The semiconductor layer is the gate electrode 402a. The upper side of the substrate is formed under the source electrode 403a and the drain electrode 403b so as to contact the source electrode 403a and the drain electrode 403b.

Here, the first and second protrusions 411 and 415 may be formed of a single layer of a semiconductor layer pattern of the same layer as the semiconductor layer, or may be a laminate of a semiconductor layer pattern and a source / drain electrode pattern of the same layer as the source / drain electrode. Is done.

The redundancy pattern 425 is formed on the boundary of the pixel area of each subpixel in a shape in which a '-' shape is erected. That is, the open portion of the redundancy pattern 425 is above the gate line 402 on which the gate electrode 402a is formed. The redundancy pattern 425 is formed of the same metal as the gate line 402 on the same layer as the gate line 402.

On the other hand, the gate line 402 has a portion that passes through the data line 403 is thinner than the other portion. This is to reduce the parasitic capacitance generated at the intersection of the gate line 402 and the data line 403 by reducing the overlap area of the wiring at the intersection of the gate line 402 and the data line 403.

As illustrated in FIG. 25, a black matrix layer 302 covering a portion excluding a pixel region and a color filter layer 303 formed corresponding to the pixel region are formed on the upper substrate 300 of the liquid crystal display according to the third exemplary embodiment of the present invention. ) Is formed. The color filter layer 303 may be formed such that color filters of R, G, and B colors are sequentially disposed on a stripe parallel to the data line 303 including the pixel area.

A common electrode (not shown) is further formed on the entire surface of the upper substrate 300 including the black matrix layer 302 and the color filter layer 303 when the liquid crystal display is formed in the TN mode. When formed, an overcoat layer (not shown) is further formed.

In addition, a column spacer 340 is formed on the upper substrate 300 corresponding to the gate line 402 and the data line 403.

Referring to FIG. 26, when the upper and lower substrates 300 and 400 are bonded, the column spacer 340 has a boundary (gate line and data line) based on one pixel including R, G, and B subpixels. ) Is formed in a 'ㅁ' shape, the first protrusion 411 is formed at the boundary of the column spacer 340, the second protrusion 415 is formed corresponding to the central portion of the column spacer 340. .

As shown in FIG. 27, in the liquid crystal display according to the third exemplary embodiment of the present invention, the column spacer 340 corresponding to the gate line 402 overlaps the second protrusion 415. The one projection 411 is formed spaced apart.

As shown in FIG. 28, in the liquid crystal display device according to the third exemplary embodiment of the present invention, the column spacer 340, which is in contact with the upper side of the data line 403, has a first protrusion 411 on both sides thereof. The first protrusions 411 are formed to be spaced apart from each other without overlapping. The first protrusions 411 are formed on the redundancy pattern 425 of the same layer as the gate lines, and are formed at positions higher than the data lines 403. Therefore, even if a shift occurs due to a touch when the surface of the upper substrate 300 or the lower substrate 400 is touched, the movement of the column spacer 340 is limited to the first protrusion 411. The movement is limited to improve light leakage due to touch failure.

On the other hand, a gate insulating film 406 is formed on the entire surface of the lower substrate 400 including the gate line 402 and the redundancy pattern 425 which are not described, and the data line 403 and the first and second protrusions 411 are formed. A protective film (not shown) is further formed between the gate insulating film 406 including the 415 and the interlayer between the pixel electrode 405.

In addition, although the color filter array is omitted in the upper substrate 300 illustrated in FIGS. 27 and 28, the color filter array (black matrix layer 302, color filter layer 303, Consider a structure in which the common electrode 304 is further formed.

The column spacer 340 may be formed to be spaced apart from the protrusion 411 of the boundary portion, as in the liquid crystal display device according to the third embodiment of the present invention. In some cases, the column spacer 340 may be formed. It may be possible to partially or completely overlap by increasing the left and right width of the bottom forming surface of the).

Also in the liquid crystal display device according to the third embodiment of the present invention, like the above-described embodiments, the liquid crystal display device is in contact with a predetermined portion which is a part of the upper area of the column spacer 340 corresponding to the gate line 402. Since the projection 415 is formed so that the contact area thereof is very small, when the upper substrate 300 or the lower substrate 400 is touched, it is easy to restore the original state after the shift of the one substrate to the opposite substrate, resulting in the touch. Poor display is prevented.

In addition, when the liquid crystal panel is erected, the column spacer 340 and the projections 411 and 415 positioned on the gate line 402 may flow in the liquid crystal due to the arrangement of the gate lines 402 positioned in a horizontal line. It acts as an obstacle that prevents the failure of gravity failure caused by sagging of the liquid crystal in a high temperature environment.

29 is a plan view illustrating a lower substrate of a liquid crystal display according to another embodiment of the third embodiment of the present invention, and FIG. 30 is a plan view showing an upper substrate of a liquid crystal display according to another embodiment of the third embodiment of the present invention; 31 is a plan view showing a state in which upper and lower substrates of the liquid crystal display device of one embodiment of the present invention are bonded together. 32 is a structural cross sectional view taken along the line 'B' of FIG. 31, and FIG. 33 is a structural cross-sectional view taken along the line 'B' of FIG.

29 to 32, the structure of the liquid crystal display according to the third exemplary embodiment of the present invention has the shape of the column spacer 350 having a '-' shape, and thus, the shape of the first protrusion 431. The shape is also the same as that of the above-described third embodiment except that the shape is taken as a '-' shape.

In the liquid crystal display according to the third embodiment, the second protrusion 435 is further formed on the gate line 402 inside the first protrusion 431.

As described above, the shape of the column spacer of the third embodiment may be defined as 'ㅁ', 'ㄱ', 'b', 'ㅛ', in pixel units or in units of individual R, G, and B subpixels, as described in the second embodiment. It can have various shapes such as 'ㅠ'.

Hereinafter, with reference to the same reference numerals as those of the liquid crystal display device of one embodiment of the above-described third embodiment on the drawings, descriptions thereof will be omitted because they have the same shape and the same function.

Also in the liquid crystal display device according to the third embodiment of the present invention, like the above-described embodiments, the liquid crystal display device is in contact with a predetermined portion which is a part of the upper area of the column spacer 350 corresponding to the gate line 402. Since the projection 435 is formed so that the contact area thereof is very small, when the upper substrate 300 or the lower substrate 400 is touched, it is easy to restore the original state after the shift of the one substrate to the opposite substrate, resulting in the touch. Poor display is prevented.

In addition, when the liquid crystal panel is erected, the column spacer 340 and the projections 431 and 435 positioned on the gate line 402 may cause the liquid crystal to flow due to the arrangement of the gate lines 402 positioned in a horizontal line. It acts as an obstacle that prevents the failure of gravity failure caused by sagging of the liquid crystal in a high temperature environment.

The liquid crystal display of the present invention as described above has the following effects.

According to an exemplary embodiment of the present invention, a liquid crystal display includes a structure in which a closed structure is formed using column spacers and protrusions for one subpixel or a plurality of subpixels, and at the same time, a contact area between a column spacer for maintaining a cell gap and a substrate opposite thereto is reduced. to be. That is, a plurality of column spacers are densely formed on the gate line and the data line, and the periphery of the plurality of column spacers is densely formed using protrusions, or a single pattern of column spacers and protrusions is correspondingly formed. By forming in a pattern, it is possible to simultaneously satisfy the isolation (closed) structure and the structure of reducing the contact area.

First, since the liquid crystal display of the present invention is in contact with a part (boundary part or center part) of the column spacer and the projection when touched, the contact area is small and the frictional force is small, so that it is easy to restore the original state after the shift of the substrate so that the touch is poor. Can be prevented.

Second, the liquid crystal display of the present invention has a closed structure (column spacer and protrusions are formed in a single pattern without dense or missing column spacers) for each unit pixel or a plurality of subpixels, so that the liquid crystal passes downward through each gate line. The runoff becomes very difficult to prevent poor gravity.

Third, when the structure of the liquid crystal display device of the present invention is applied, it is possible to solve the problem of the liquid crystal amount, which has been strictly limited, without adding a new process. That is, even if the amount of liquid crystal is somewhat less than that of the appropriate cell gap, the contact stain can be prevented by the frictional force reduction, and even though the cell gap is increased due to the liquid crystal thermal expansion, the liquid crystal is eventually lowered due to the densely formed pattern on the upper and lower substrates. This is because the flow of the liquid crystal is very limited and prevents gravity failure, resulting in an increase in the margin of the appropriate amount of the liquid crystal contained in a very narrow range.

Claims (42)

A first substrate and a second substrate facing each other; A plurality of gate lines and data lines formed on the first substrate to cross each other to define a pixel area; A column spacer formed corresponding to at least a plurality of gate lines on the second substrate; A first protrusion formed on the first substrate to correspond to a boundary of the column spacer; And And a liquid crystal layer filled between the first substrate and the second substrate. The method of claim 1, And a plurality of column spacers spaced apart from each other at intervals of a critical dimension of their lower formation surface. The method of claim 1, And a plurality of the first protrusions spaced apart from each other at intervals equal to or less than a critical dimension of their lower surface. The method of claim 1, And the column spacer is formed corresponding to each of the plurality of gate lines. The method of claim 1, The column spacer is formed to correspond to each of the plurality of gate lines and data lines. The method of claim 1, And the column spacer corresponding to each of the plurality of gate lines and corresponding to a predetermined portion of each of the plurality of data lines. The method of claim 1, And the column spacer corresponding to each of the plurality of gate lines, and corresponding to each of n data lines of the plurality of data lines (n is a natural number of two or more). The method of claim 1, The column spacer corresponds to each of the plurality of gate lines, and the n (n is a natural number of two or more) data lines of the plurality of data lines are formed in correspondence at a predetermined portion. The method of claim 1, And a second protrusion formed corresponding to the central portion of the column spacer formed corresponding to the gate line. The method of claim 1, And the first protrusion is partially overlapped with the column spacer. The method of claim 1, And the first protrusion is formed in contact with a boundary of the column spacer or spaced apart from the boundary by a predetermined distance. The method of claim 1, The column spacer is made of an organic material. The method of claim 1, A thin film transistor is further formed at an intersection of the gate line and the data line on the first substrate, and a pixel electrode is further formed in the pixel area. The method of claim 13, The thin film transistor is A gate electrode protruding from the gate line; A source electrode protruding in a 'U' shape from the data line; A drain electrode partially entering the 'U' source electrode; And And a semiconductor layer formed between the gate electrode and the source electrode / drain electrode in contact with a lower side of the source electrode / drain electrode. The method of claim 14, The 'U' shaped source electrode is formed in the gate line direction. The method of claim 14, And the 'U'-shaped source electrode is formed in the data line direction. The method of claim 14, The plurality of protrusions are formed in a semiconductor layer pattern formed on the same layer as the semiconductor layer. The method of claim 17, And a source / drain electrode pattern formed on the same layer as the source / drain electrode on the semiconductor layer pattern. The method of claim 1, And a redundancy pattern is further formed at the boundary of each pixel area. The method of claim 19, The redundancy pattern is a liquid crystal display, characterized in that the '-' shape of the upper portion of the gate line open. The method of claim 1, And a black matrix layer formed on the gate line and the data line, and a color filter layer formed on the second substrate, on the second substrate. A first substrate and a second substrate facing each other; A gate line and a data line intersecting each other on the first substrate to define a pixel area; A plurality of first column spacers disposed at intervals smaller than a critical dimension of the lower surface of the lower surface, the plurality of first column spacers corresponding to the gate lines and the plurality of second column spacers corresponding to the data lines; A plurality of protrusions formed on upper and lower boundaries of the plurality of first column spacers on the first substrate; And And a liquid crystal layer filled between the first substrate and the second substrate. The method of claim 22, And the plurality of first column spacers are disposed in a linear shape corresponding to the gate lines, and the plurality of second column spacers are disposed in a linear shape corresponding to the data lines. The method of claim 23, wherein And the plurality of protrusions are disposed in parallel with the first column spacers. The method of claim 22, And the plurality of first column spacers and the plurality of protrusions are formed in the gate line line width, and the plurality of second column spacers are formed in the data line line width. A first substrate and a second substrate facing each other; A plurality of gate lines and data lines formed on the first substrate to cross each other to define a pixel area; A column spacer formed on the second substrate to correspond to at least the plurality of gate lines; A protrusion formed on the first substrate to correspond to a boundary of the column spacer; And And a liquid crystal layer filled between the first substrate and the second substrate. The method of claim 26, And the protrusion partially overlaps the column spacer. The method of claim 26, The redundancy pattern is further formed on the boundary of the pixel region. The method of claim 28, The redundancy pattern is a liquid crystal display, characterized in that the '-' shape of the upper portion of the gate line open. The method of claim 26, And the column spacer is formed corresponding to each of the plurality of gate lines. The method of claim 26, The column spacer is formed to correspond to each of the plurality of gate lines and data lines. The method of claim 26, And the column spacer corresponding to each of the plurality of gate lines and corresponding to a predetermined predetermined portion of each of the plurality of data lines. The method of claim 26, And the column spacer corresponding to each of the plurality of gate lines, and corresponding to each of n data lines of the plurality of data lines (n is a natural number of two or more). The method of claim 26, The column spacer corresponds to each of the plurality of gate lines, and wherein n (n is a natural number of two or more) data lines of the plurality of data lines are formed in correspondence at predetermined portions. A first substrate and a second substrate facing each other; A plurality of gate lines and data lines formed on the first substrate to cross each other to define a pixel area; A column spacer formed on the second substrate corresponding to at least the gate line; A first protrusion formed on the first substrate to correspond to a boundary of the column spacer; A second protrusion formed on the first substrate and spaced apart from the first protrusion corresponding to a center of the column spacer; And And a liquid crystal layer filled between the first substrate and the second substrate. The method of claim 35, wherein The redundancy pattern is further formed on the boundary of the pixel region. The method of claim 36, The redundancy pattern is a liquid crystal display, characterized in that the '-' shape of the upper portion of the gate line open. The method of claim 35, wherein And the column spacer is formed corresponding to each of the plurality of gate lines. The method of claim 35, wherein The column spacer is formed to correspond to each of the plurality of gate lines and data lines. The method of claim 35, wherein And the column spacer corresponding to each of the plurality of gate lines and corresponding to a predetermined portion of each of the plurality of data lines. The method of claim 35, wherein And the column spacer corresponding to each of the plurality of gate lines, and corresponding to each of n data lines of the plurality of data lines (n is a natural number of two or more). The method of claim 35, wherein The column spacer corresponds to each of the plurality of gate lines, and wherein n (n is a natural number of two or more) data lines of the plurality of data lines are formed in correspondence at predetermined portions.

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