KR20060000254A - Liquid crystal display - Google Patents

Abstract

According to an embodiment of the present invention, a plurality of protrusion patterns are arranged to be equally spaced apart from each other to correspond to the center of the column spacer, so that a shift margin having an area corresponding to the protrusion patterns even when the upper and lower substrates are shifted due to a touch occurs. A liquid crystal display device further comprising: a first and a second substrate facing each other, a column spacer formed on the first substrate, and a second distance so as to correspond to the same separation distance from a center of an upper surface of the column spacer. And a plurality of protrusion patterns formed on the substrate and a liquid crystal layer formed between the first and second substrates.

Poor touch, contact area, column spacers, protrusion patterns, shift margins

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;

4 is a plan view showing a conventional liquid crystal display device.

5 is a structural cross-sectional view taken along line II ′ of FIG. 4.

6a and 6b are a plan view and a cross-sectional view showing the appearance of the site where a conventional touch stain occurs;

7 is a plan view illustrating a liquid crystal display device including a protrusion pattern.

FIG. 8 is a cross-sectional view taken along line III-III ′ of FIG. 7;

9 is a plan view illustrating a state in which column spacers and protrusion patterns correspond to each other after bonding upper and lower substrates of the liquid crystal display of FIGS. 7 and 8.

10A and 10B are diagrams showing the degree of correspondence between the column spacer and the protrusion pattern when the upper and lower substrates of FIG. 9 are shifted after bonding.

11 illustrates a correspondence degree between a column spacer and a protrusion pattern of a liquid crystal display according to a first exemplary embodiment of the present invention.

12 illustrates a shiftable shift degree of a liquid crystal display according to a first exemplary embodiment of the present invention.

13 is a diagram illustrating a correspondence degree between a column spacer and a protrusion pattern of a liquid crystal display according to a second exemplary embodiment of the present invention.

14 is a view illustrating a shift amount of a shift of a liquid crystal display according to a second exemplary embodiment of the present invention.

15 is a diagram illustrating a correspondence degree between a column spacer and a protrusion pattern of a liquid crystal display according to a third exemplary embodiment of the present invention.

16A and 16B are diagrams illustrating a movable shift degree of a liquid crystal display according to a third exemplary embodiment of the present invention.

17 is a plan view illustrating a liquid crystal display according to a third exemplary embodiment of the present invention.

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

30: first substrate 31: black matrix layer

32: color filter layer 33: overcoat layer

40: second substrate 41: gate line

41a: gate electrode 42: data line

42a: source electrode 42b: drain electrode

42c: metal pattern 43: pixel electrode

43a: storage electrode 44: semiconductor layer

44a: amorphous silicon layer 44b: n + layer

45 gate insulating film 46 protective film                 

47: common line 47a: common electrode

50: column spacer 51: protrusion pattern

53 pixel electrode 55 liquid crystal layer

70, 75, 80: column spacer

71a, 71b, 76a, 76b, 81a to 81d: protrusion pattern

100: color filter array substrate 200: TFT array substrate

The present invention relates to a liquid crystal display, and in particular, a plurality of protrusion patterns are arranged to be spaced at equal intervals corresponding to the centers of the column spacers, so that even if the upper and lower substrates are shifted due to touch, the area of the column spacers corresponds to the protrusion patterns. It relates to a liquid crystal display device having a shift margin having.

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 (ELD), and vacuum fluorescent (VFD) 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.

As shown in FIG. 1, a liquid crystal display device includes a liquid crystal 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 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 each of the gate lines 4 and the data lines 5 intersect with each other so that the thin film transistors are 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 1 and 2 is oriented by an electric field formed between the pixel electrode 6 and the common electrode 9, The amount of light passing through the liquid crystal layer 3 may be adjusted according to the degree of alignment of the liquid crystal layer 3 to express an image.

Such a liquid crystal display is called a twisted nematic (TN) mode liquid crystal display, and the TN mode liquid crystal display has a disadvantage of having a narrow viewing angle, and an in-plane switching (IPS) mode to overcome the disadvantage 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 horizontal electric field is generated between the pixel electrode and the common electrode and the horizontal 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 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 cell gap on the TFT substrate or the color filter substrate is spread (S30), and the two substrates are bonded to an outer portion of each liquid crystal panel region. In order to form a seal pattern (seal pattern) (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.

There existed the following problems in the liquid crystal display device manufacturing method of such a liquid crystal injection system.

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 dropping method manufacturing method of a liquid crystal dropping system is a method of bonding two board | substrates together after dropping an appropriate amount of liquid crystal to either one of two board | substrates before bonding two board | substrates together.                         

Therefore, when a ball spacer is used to maintain a cell gap like a liquid crystal injection method, when the dropped liquid crystal spreads, the ball spacer is moved in the liquid crystal spreading direction so that the spacer is driven to one side, so that accurate cell gap maintenance is impossible. Done.

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.

4 is a plan view illustrating a conventional liquid crystal display, and FIG. 5 is a structural cross-sectional view taken along line II ′ of FIG. 4.

As shown in FIGS. 4 and 5, in the array area of the conventional liquid crystal display, the gate line 4 and the data line 5 are arranged perpendicularly to each other to define the pixel area, and the respective gate lines 4 are arranged. ) And a thin film transistor TFT are formed at a portion where the data line 5 crosses each other, and a pixel electrode 6 is formed in each pixel region. In addition, column spacers 20 are formed to maintain a cell gap at regular intervals.                         

Here, the column spacer 20 is formed in a portion corresponding to the upper side of the gate line 4, as shown in FIG. That is, the gate line 4 is formed on the first substrate 1, the gate insulating layer 15 is formed on the entire surface of the substrate including the gate line 4, and the passivation layer 16 is formed on the gate insulating layer 15. Is formed.

The second substrate 2 includes a black matrix layer 7 for covering non-pixel regions (gate lines, data lines, and thin film transistor regions) other than the pixel region, and a color filter substrate including the black matrix layer 7. A color filter layer 8 formed by corresponding R, G, and B pigments in turn on each of the pixel regions and a common electrode 14 formed on the entire surface of the second substrate 2 including the color filter layer 8 are formed on (2). Is formed.

The column spacer 20 is formed on the common electrode 14 of the portion corresponding to the gate line 4 so that the two substrates 1 and 2 are positioned so that the column spacer 20 is positioned on the gate line 4. Are cemented.

As described above, the liquid crystal display manufactured by the dropping method in which the column spacer is formed has the following problems.

When the panel surface of the liquid crystal display device in which the column spacers are formed is applied by a force in a predetermined direction, the cloudy touch unevenness is not restored, and the phenomenon of staying for a long time is observed.

Hereinafter, the phenomenon and cause of the touch spot will be described through the drawings.

6A and 6B are plan and cut views showing a state where a touch spot occurs.

As shown in FIG. 6A, when the surface of the liquid crystal panel 10 is swung in a predetermined direction while being touched with a finger or a pen, the upper substrate 2 of the liquid crystal panel 10 may have a finger passing as shown in FIG. 6B. Direction is shifted by a predetermined interval.

At this time, the columnar columnar spacer 20 is in contact with the upper and lower substrates 1 and 2, and the contact area is large, and the friction force generated between the column spacer 20 and the opposing substrate (lower substrate 1) is large. Therefore, after shifting in the touch direction, the upper substrate 2 has not been restored to its original state for a long time. In this case, the liquid crystals of the spot where the finger or the pen passed by are scattered, and a phenomenon in which the liquid crystal collects in the peripheral region of the passed spot occurs. In this case, the area where the liquid crystals 3 are collected has a higher cell gap h1 than the cell gap h2 of the other area defined by the height of the column spacer 20, and the place where the finger or the pen passes is where the liquid crystal is. Scattered, the touch region and the area around the touch due to the excess or lack of the liquid crystal does not drive the normal liquid crystal, the touch failure observed as a stain occurs.

The reason why such a touch defect is observed in the liquid crystal display device having the column spacer compared to the liquid crystal display device having the ball spacer formed in the related art is that the column spacer is fixed to one substrate and is in planar contact with the opposite substrate, so that the spherical ball is formed. This is because the area in contact with the substrate is larger than that of the spacer.

On the other hand, the above-described touch stain can be solved by increasing the amount of liquid crystal dropped, but will cause another problem of relatively poor gravity while the touch stain is eliminated.

In general, liquid crystal displays are used in display devices such as monitors, notebooks, TVs, and the like, and in many cases, the panels stand vertically. At this time, the liquid crystal is concentrated in the direction of gravity. In particular, when the panel is in a high temperature state, the degree becomes severe because the thermal expansion of the liquid crystal becomes large. Therefore, the amount of liquid crystal dropped in the liquid crystal panel should also be below the level at which gravity failure does not occur. Therefore, since it is limited to filling the excess liquid crystal, it is difficult to completely eliminate the touch failure in reality.

The present invention has been made in order to solve the above problems, by arranging a plurality of projection patterns to be spaced at equal intervals corresponding to the center of the column spacer, even if the shift of the upper and lower substrates due to the touch occurs, the column spacer is applied to the projection patterns SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device further having a shift margin having a corresponding area.

The liquid crystal display device of the present invention for achieving the above object is the same distance from the center of the first and second substrates, the column spacer formed on the first substrate, and the upper surface of the column spacer facing each other It is characterized in that it comprises a plurality of projection patterns formed on the second substrate so as to correspond to the liquid crystal layer formed between the first and second substrates.

The plurality of protrusion patterns have the same overlap area with respect to an upper surface of the column spacer.                     

The overlap area is half the area of the protruding pattern itself.

The top surface of the column spacer is polygonal in shape.

The plurality of protrusion patterns are disposed to correspond to the centers of symmetrical sides of the polygons of the column spacer.

The plurality of protrusion patterns are disposed to correspond to the centers of the sides of the polygons of the column spacers.

The top surface of the column spacer is circular.

Each of the plurality of protrusion patterns has the same size.

The plurality of protrusion patterns may have a smaller upper surface than an upper surface of the column spacer.

The first substrate is a color filter array substrate, and the second substrate is a TFT array substrate.

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

FIG. 7 is a plan view illustrating a liquid crystal display including a protrusion pattern, and FIG. 8 is a cross-sectional view illustrating the structure of the line III-III ′ of FIG. 7.

7 and 8 illustrate an in-plane switching mode liquid crystal display, for example. The color filter array substrate 100 and the protrusion pattern 51 which are largely opposed to each other are shown. A liquid crystal layer filled between the TFT array substrate 200 and the column spacer 50 formed on the color filter array 100 corresponding to the protrusion pattern 51 and the two array substrates 100 and 200. It comprises 55.

Here, the color filter array substrate 100 is formed on the first substrate 30 and the first substrate 30 to cover a non-pixel region (gate line and data line region, thin film transistor forming region). R, G, and B color filter layers 32 and the color filter layers formed on the entire surface of the first substrate 30 including the layer 31 and the black matrix layer 31 corresponding to each sub-pixel. And an overcoat layer 33 for planarization on the entire surface of the first substrate 30 including 32.

In addition, the TFT array substrate 200 includes a gate line 41 and a data line 42 that vertically intersect the second substrate 40 and define a pixel area, and the gate line 41 and the data line. A thin film transistor TFT formed at an intersection portion of the 42, a projection pattern 51 formed at a predetermined position on the gate line 41, and a common electrode alternately formed in a zigzag pattern in the pixel region. A common line 47 formed across the pixel region in parallel with the gate line 41 and connected to the common electrode 47a, and the common line 47. And a storage electrode 43 which overlaps a predetermined portion in the pixel area and branches the pixel electrode 43.

The thin film transistor TFT may include a gate electrode 41a protruding from the gate line 41, and a source electrode 42a and a drain electrode 42b spaced apart from each other by a predetermined interval to cover both sides of the upper portion of the gate electrode 41a. ), A semiconductor layer formed under the metal layer forming the data line 42, the source electrode, the drain electrode, and the like, including a channel formed at a portion where the source electrode 42a and the drain electrode 42b are spaced apart from each other. 44). Here, the semiconductor layer 44 is formed by laminating an amorphous silicon layer 44a at a lower portion and an n + layer 44b at an upper portion thereof, and the n + layer 44b is removed from a channel portion.

In the drawing, the data line 42 is illustrated as having a shape perpendicular to the gate line 41, but may be formed in a zigzag pattern parallel to the common electrode 47a and the pixel electrode 43. It may be. In this case, the transverse electric field is further reinforced.

The gate insulating layer 45 covering the gate line 41 and the gate electrode 41a is formed on the entire surface of the second substrate 40 under the semiconductor layer 44, and the drain electrode 42b and the pixel electrode ( A passivation layer 46 is interposed between the layers of 43 to form a passivation layer hole to contact the drain electrode 42b and the pixel electrode 43 through the passivation layer hole.

Here, the common line 47 and the common electrode 47a branched from the common line 47 are simultaneously deposited in the gate line 41 forming step, and the pixel electrode 43 is formed of a passivation layer including the passivation hole. 46).

The protrusion pattern 51 is formed at a predetermined position on the gate line 41, and a source / drain metal layer 42c is sequentially deposited on the semiconductor layer (see 44 in FIG. 9) below. The protrusion pattern 51 is defined and formed together in the process of forming the data line 42 (during the four mask manufacturing process), and the gate line 41 is formed between the protrusion pattern 51 and the gate insulating layer. It is insulated from the projection pattern 51 via the 45.

Here, the color filter array substrate 100 on which the column spacer 50 is formed and the TFT array substrate 200 on which the protrusion patterns 51 are provided may include an alignment layer (not shown) on the uppermost surface facing each other.

The liquid crystal display of the IPS mode has been described above, but the structure of the above-described protrusion pattern and the column spacer formed corresponding to the protrusion pattern can be applied to the liquid crystal display of the TN mode. In the liquid crystal display of the TN mode, the TFT array substrate 200 alternately forms a pixel electrode and a common electrode in the pixel region, and the color filter array substrate 100 replaces the common electrode with an overcoat layer.

Hereinafter, the column spacer 50 and the protrusion pattern 51 will be described in detail with reference to the drawings.

9 is a plan view illustrating a state in which column spacers and protrusion patterns correspond to each other after bonding upper and lower substrates of the liquid crystal display of FIGS. 7 and 8.

As shown in FIG. 9, the protrusion pattern 51 is generally disposed to be centered with respect to the column spacer 50.

For example, it is assumed that an upper surface of the column spacer 50, that is, a corresponding surface in contact with the TFT array substrate 200 has a rectangular shape, and the upper surface has a width a and length b. In addition, it is assumed that the protruding pattern 51 is also rectangular in shape, and the horizontal and vertical lengths are c and d, respectively.                     

In this case, the protrusion pattern 51 is an element for minimizing the area where the column spacer 50 comes into contact with the TFT array substrate 200 when the first substrate 30 is touched. It is formed to have an area (a * b> c * d, a> c, b> d) smaller than the upper surface of the). In this case, the column spacer 50 contacts the corresponding portions of the protrusion pattern 51 and the upper surface of the column spacer 50 when the first and second substrates 30 and 40 are applied by applying a predetermined pressure. The contact area is the same as that of the protrusion pattern 51 after normal bonding. Here, the reason why the column spacer 50 is in contact with the protrusion pattern 51 is that the source pattern 51 is further formed with a source / drain metal layer 42c and a semiconductor layer 44 as compared with other portions. This is because the step is high.

On the other hand, after bonding the first and second substrates 30 and 40, when the back surface of the first substrate 30 or the second substrate 40 is touched to apply a pushing force in a predetermined direction, the first and second substrates are applied. The substrates 30 and 40 are staggered from each other, and a shifting phenomenon occurs.

10A below illustrates a phenomenon in which a shift occurs when the upper and lower substrates push the rear surface of the first substrate 30 to the left after bonding, and FIG. 10B shows the rear surface of the first substrate 30 pushed upward. In other words, the shift occurs.

As shown in FIG. 10A, when the left shift of the first substrate 30 occurs, the shift degree is 1/2 length (a / 2) of the horizontal length of the column spacer and 1/2 length of the horizontal length of the protrusion pattern ( When the value ((ac) / 2) minus c / 2) is exceeded, the corresponding area of the protrusion pattern 51 and the column spacer 50 is gradually reduced. When the shift degree is continuously increased to exceed (a + c) / 2 (② shift), the projection pattern 51 and the column spacer 50 are completely shifted from each other and do not correspond to each other, so that the projection pattern 51 ) And the column spacer 50 do not come into contact with each other. Therefore, when the degree of shift exceeds (a + c) / 2, the column spacer 50 is in contact with another flat region of the TFT array substrate 100 instead of the protrusion pattern 51, so that the column spacer 50 The contact area is relatively large as much as the area, and in this case, the frictional force at the time of touch is increased, and the restoration during the shifting of the first and second substrates 30 and 40 after the touch is slow.

Therefore, the correspondence degree between the column spacer 50 and the protrusion pattern 51 has a shift margin in a range where the protrusion pattern 51 overlaps a predetermined portion with respect to the column spacer 50. In this case, when the first substrate 30 including the column spacer 50 is shifted, the shift margin that can overlap the protrusion pattern 51 is within a range of (a + c) / 2. However, in the range of a / 2 to (a + c) / 2, an overlap with the column spacer 50 occurs at an area that is too small, less than 1/2 of the total area of the protrusion pattern 51, and at this time, the color filter array Due to the characteristics of the column spacer having the support force through contact between the substrate 100 and the TFT array substrate 200, the support force is weak because the dispersion force is not uniformly secured when the column spacer 50 contacts the TFT array substrate 200. Can be done. In addition, when the column spacer 50 and the protrusion pattern 51 have an overlap in a region that is too small, the column spacer 50 may pass through the protrusion pattern 51 and may contact the planarization region. It is preferable to keep the shift degree within a / 2 in the left direction of the substrate 30.

Therefore, when shifting the 1st board | substrate 30, a shift margin can be said to be a / 2 ((1) shift).

Although not shown, the same principle applies to shifting the right side of the first substrate 30 to have a shift margin of a / 2.

As shown in FIG. 10B, when the first substrate 30 is shifted in the upward direction, the shift degree is 1/2 of the vertical length of the column spacer and 1/2 of the vertical length of the projection pattern. When the value (bd) / 2 minus the length d / 2 is exceeded, the corresponding area of the protrusion pattern 51 and the column spacer 50 gradually decreases. Subsequently, when the shift degree is higher than (b + d) / 2 to shift upward, the protrusion pattern 51 and the column spacer 50 do not completely correspond to each other, so that the protrusion pattern 51 and The column spacer 50 is not in contact.

Accordingly, the column spacer 50 is in contact with another flat region of the TFT array substrate 100 instead of the protrusion pattern 51, so that the contact area is relatively large by the area of the column spacer 50. In this case, In this case, the frictional force is increased at the time of touch, and thus the restoration of the first and second substrates 30 and 40 after the touch is slow.

Meanwhile, as described above, when the column spacer 50 and the protrusion pattern 51 correspond to each other smoothly when the column spacer 50 overlaps at least 1/2 of the area of the protrusion pattern 51, the upward direction The bonding margin to is equal to 1/2 the length (b / 2) of the longitudinal length of the column spacer 50.

Similarly, the shift margin in the downward direction will also correspond to b / 2.                     

Therefore, when the projection pattern is located in the center of the column spacer, when the first push the back of the first substrate 30 or the second substrate 40 in one direction when the first and second substrates 30, 40 are moved The shift margin of will correspond to b / 2 in the vertical direction and a / 2 in the left and right directions.

In the liquid crystal display of the present invention, in order to prepare for a shift phenomenon in which the first and second substrates due to the touch are shifted from each other, the plurality of protrusion patterns spaced apart from each other by the same distance with respect to the center of the column spacer are disposed.

Here, the upper surface of the column spacer in contact with the TFT array substrate may be formed in a polygon such as a circle, a triangle, a rectangle, or the like.

In this case, the protruding pattern is formed corresponding to the center of each side of the polygon forming the upper surface of the column spacer, or formed in such a way that each protruding pattern is spaced at equal intervals in a circle forming the upper surface of the column spacer.

Hereinafter, various embodiments of the liquid crystal display of the present invention will be described with reference to the drawings.

FIG. 11 is a diagram illustrating a correspondence degree between a column spacer and a protrusion pattern of a liquid crystal display according to the first exemplary embodiment of the present invention, and FIG. 12 is a diagram illustrating a shift degree of the shift of the liquid crystal display according to the first exemplary embodiment of the present invention. The figure shown.

As shown in FIG. 11, in the liquid crystal display according to the first exemplary embodiment, the first and second protrusion patterns 71a and 71b are corresponded to both left and right sides on the assumption that the top surface of the column spacer 70 is rectangular. It has a formed configuration. Here, it is assumed that the column spacers each have a size of horizontal a and vertical b, and the first and second protrusion patterns 71a and 71b have a size of horizontal c and vertical d, respectively.

In this case, the first and second protrusion patterns 71a and 71b are spaced apart from each other at centers O of the column spacer 70 at equal intervals a / 2. Therefore, the first and second protrusion patterns 71a and 71b are arranged such that half ((c * d) / 2) of their area overlaps the column spacer 70 on the sides that are symmetrical to each other.

As described above, the first and second substrates (at a level where overlapping of at least 1/2 (> (c * d) / 2) of the areas of the one-protrusion patterns 71a and 71b occur with respect to the column spacer 70. If the shifts 30 and 40 are possible, the shift margin of the liquid crystal display according to the first exemplary embodiment of the present invention is shown in FIG. 12 (only the left shift margin is shown in the drawing), respectively. It will correspond to the horizontal length (a) of).

Therefore, the liquid crystal display according to the first exemplary embodiment of the present invention has a shift margin of two times on each of the left and right sides relative to the structure corresponding to the center of the column spacer. In this case, the upper and lower shift margins will correspond to b / 2.

FIG. 13 is a diagram illustrating a correspondence degree between a column spacer and a protrusion pattern of a liquid crystal display according to a second exemplary embodiment of the present invention, and FIG. 14 illustrates a movable shift degree of the liquid crystal display according to the second exemplary embodiment of the present invention. The figure shown.

As shown in FIG. 13, in the liquid crystal display according to the second exemplary embodiment, the first and second protrusion patterns 76a and 76b are corresponded to both upper and lower sides under the assumption that the upper surface of the column spacer 75 is rectangular. It has a formed configuration. In this case, it is assumed that the column spacer 75 has a size of horizontal a and vertical b, respectively, and the first and second protrusion patterns 76a and 76b have a size of horizontal c and vertical d, respectively.

In this case, the first and second protrusion patterns 76a and 76b are spaced apart from each other by the same distance (b / 2) above and below the central portion O of the column spacer 75. Accordingly, the first and second protrusion patterns 76a and 76b are arranged such that half ((c * d) / 2) of their area overlaps the column spacer 75 at the sides that are symmetrical to each other.

As described above, the first and second substrates (at a level where overlap of at least 1/2 (> (c * d) / 2) of the areas of the one-protrusion patterns 76a and 76b occur with respect to the column spacer 75. If shifts of 30 and 40 are possible, the shift margins of the upper and lower sides of the liquid crystal display according to the first exemplary embodiment of the present invention are shown in FIG. 14 (only the upper shift margin is shown in the drawing). It will correspond to the length b of the top surface of 70.

Therefore, the liquid crystal display according to the second exemplary embodiment of the present invention has a shift margin of twice as large as that of the structure in which the protrusion pattern corresponds to the center of the column spacer in the vertical direction. In this case, the upper and lower shift margins will correspond to a / 2.

Hereinafter, an embodiment in which the shift margin is increased in both the vertical direction and the left and right directions will be described.

FIG. 15 is a view illustrating a correspondence degree between a column spacer and a protrusion pattern of a liquid crystal display according to a third exemplary embodiment of the present invention, and FIGS. 16A and 16B are diagrams illustrating a moveability of the liquid crystal display according to the third exemplary embodiment of the present invention. It is a figure which shows the degree of a shift.

As shown in FIG. 15, in the liquid crystal display according to the third exemplary embodiment, the first to second protrusion patterns 81a and the center of each side of the rectangle are assumed under the assumption that the top surface of the column spacer 80 is rectangular. 81b, 81c, 81d) are formed to correspond. Here, it is assumed that the column spacers each have a size of horizontal a and vertical b, and the first to fourth protrusion patterns 81a, 81b, 81c, and 81d have a size of horizontal e and vertical f, respectively.

In this case, the first and third protrusion patterns 81a and 81c are disposed to be spaced apart from each other by the same distance (a / 2) from the central portion O of the column spacer 70 on the left and right sides, respectively. The protruding patterns 81b and 81d are spaced apart from each other by the same distance (b / 2) above and below the center O of the column spacer 70, respectively, so that the first to fourth protruding patterns 81a to 81d are respectively formed. The same area as that of the column spacer 80 is formed to overlap. In this case, the overlap area between each projection pattern and the column spacer 80 is 1/2 ((e * f) / 2) of one projection pattern area.

As shown in FIG. 16A, the first and third portions of the first and third protrusion patterns 81a and 81c are overlapped with each other at a level at which 1/2 or more (> (c * d) / 2) overlaps of the column spacers 80 occur. If the shift of the two substrates 30 and 40 is possible, in the liquid crystal display device according to the third embodiment of the present invention, the shift margins in the left and right directions are horizontal on the upper surface of the column spacer 80, respectively. It will correspond to the length (a).

As shown in FIG. 16B, the first and second substrates are formed at a level at which 1/2 or more (> (c * d) / 2) overlaps of the areas of the second and fourth (81b, 81d) occur with respect to the column spacer 80. If shifts of 30 and 40 are possible, in the liquid crystal display according to the third embodiment of the present invention, the vertical and vertical shift margins of the upper and lower surfaces of the column spacers 80 are b. Will correspond to

The liquid crystal display according to the third exemplary embodiment has a shift margin equal to the horizontal length a of the column spacer in the left and right directions, and a shift margin equal to the vertical length b of the column spacer in the vertical direction.

Therefore, in the case of the third embodiment, each of the projection patterns has a shift margin of twice each in the left, right, and up and down directions relative to the structure corresponding to the center of the column spacer.

17 is a plan view illustrating a liquid crystal display according to a third exemplary embodiment of the present invention.

As shown in FIG. 17, in the liquid crystal display according to the third exemplary embodiment, the first to fourth protrusion patterns 81a to 81d are formed to correspond to the sides of the column spacer 80 in the structure shown in FIG. 7. The same configuration is taken except for one point. In this case, all of the first to fourth protrusion patterns 81a to 81d and the column spacer 80 are positioned on the gate line 41.

In the liquid crystal display of the present invention, a column spacer is formed on a first substrate, and a protrusion pattern is formed on a second substrate at a portion facing the upper surface of the column spacer, thereby reducing a second substrate contact area of the column spacer. As a result, the frictional force of the column spacer during the touch is reduced to prevent a touch failure in which the substrate is pushed in a predetermined direction during the touch. In addition, by placing a projection pattern corresponding to the upper surface of the column spacer at a distance spaced apart from the center of the column spacer, when pushed in a predetermined direction during touch, a large shift margin is secured, the column spacer is protruded by the shift The pattern is out of the pattern, and the contact area is increased by contacting the other flat area, thereby preventing a phenomenon in which touch restoration is not smoothly performed.

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

First, a column spacer is formed on a first substrate, and a projection pattern is formed on a second substrate at a portion opposite to the upper surface of the column spacer, thereby reducing the contact area of the second substrate of the column spacer. The friction force by the column spacer is reduced to prevent a touch failure in which the substrate is pushed in a predetermined direction during touch.

Second, by arranging a plurality of projection patterns corresponding to the upper surface of the column spacer at a distance spaced apart from the center of the column spacer, when the touch is pushed in a predetermined direction, a large shift margin is secured. Therefore, the column spacer deviates from the projection pattern due to the shift, and the contact area is enlarged by contacting the other flat area, thereby preventing the phenomenon in which touch restoration is not smoothly performed due to an increase in frictional force.

Claims (10)

First and second substrates opposed to each other; A column spacer formed on the first substrate; A plurality of protrusion patterns formed on the second substrate so as to correspond to the same separation distance from the center of the top surface of the column spacer; And And a liquid crystal layer formed between the first and second substrates. The method of claim 1, The plurality of protrusion patterns have the same overlap area with respect to the upper surface of the column spacer, respectively. The method of claim 1, And wherein the overlap area is one half of the protrusion pattern itself. The method of claim 1, The upper surface of the column spacer is a polygonal shape, characterized in that the liquid crystal display. The method of claim 4, wherein And the plurality of protrusion patterns are disposed to correspond to centers of symmetrical sides of the polygons of the column spacer. The method of claim 4, wherein And the plurality of protrusion patterns are disposed to correspond to the centers of the sides of the polygons of the column spacers. The method of claim 1, And a top surface of the column spacer is circular. The method of claim 1, The plurality of protrusion patterns are the same size, respectively, characterized in that the liquid crystal display device. The method of claim 1, The plurality of protrusion patterns have a smaller upper surface than the upper surface of the column spacer. The method of claim 1, And the first substrate is a color filter array substrate, and the second substrate is a TFT array substrate.

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