KR20050054214A - The printing device for the liquid crystal display device - Google Patents

Abstract

The present invention relates to a printing apparatus for a liquid crystal display device capable of preventing misalignment of a printing pattern, comprising: a cliché in which a printing material is selectively inserted to form a printing pattern; A stage on which a substrate on which the printed pattern is to be formed is placed; A roller for receiving a printing pattern from the cliché and transferring the printed pattern to a substrate on a stage; An elastic member attached to an outer circumferential surface of the roller and having a plurality of piezoelectric elements formed therein; A displacement measuring unit which senses a distance between the alignment keys formed on the substrate and measures a change in the size of the substrate to output a displacement signal; In response to the displacement signal output from the displacement measuring unit, a voltage is applied to a plurality of piezoelectric elements embedded in the elastic member, and the elastic member is disposed between the X axis, the Y axis, or between the X axis and the Y axis according to the size change of the substrate. It is configured to include a control unit for contracting and expanding in each direction.

Description

The printing device for the liquid crystal display device}

The present invention relates to a manufacturing apparatus for a liquid crystal display device, and more particularly, to a printing device for a liquid crystal display device capable of preventing misalignment of a printing pattern due to deformation of a substrate.

As the information society develops, the demand for display devices is increasing in various forms, and in recent years, liquid crystal displays (LCDs), plasma display panels (PDPs), electro luminescent displays (ELDs), and vacuum fluorescent displays (VFDs) have been developed. Various flat panel display devices 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 a substitute for CRT (Cathode Ray Tube) for the use of mobile image display device because of the excellent image quality, light weight, thinness, and low power consumption, and mobile type such as monitor of notebook computer. In addition, it is being developed in various ways, such as a television for receiving and displaying broadcast signals, and a monitor of a computer.

As described above, although various technical advances have been made in order for the liquid crystal display device to serve as a screen display device in various fields, the task of improving the image quality as the screen display device has many advantages and disadvantages.

Therefore, in order to use a liquid crystal display device in various parts as a general screen display device, the key to development is how much high definition 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. It can be said.

Such a liquid crystal display device may be classified into a liquid crystal display panel displaying an image and a driving unit for applying a driving signal to the liquid crystal display panel, wherein the liquid crystal display panel has a space and is bonded to the first and second substrates. And a liquid crystal layer injected between the first and second substrates.

The first substrate (TFT array substrate) may include a plurality of gate lines arranged in one direction at a predetermined interval, a plurality of data lines arranged at regular intervals in a direction perpendicular to the gate lines, and the respective gates. A plurality of thin film transistors which are switched by signals of the gate line and a plurality of pixel electrodes formed in a matrix form in each pixel region defined by crossing a line and a data line, transmit a signal of the data line to each pixel electrode. Formed.

In addition, the second substrate (color filter substrate) includes a black matrix layer for blocking light in portions other than the pixel region, R, G, and B color filter layers for expressing color colors, and a common electrode for implementing an image. Is formed.

The first and second substrates have a predetermined space by spacers, are bonded by a sealant, and a liquid crystal layer is formed between the two substrates.

On the other hand, an alignment layer is formed on the facing surfaces of the first substrate and the second substrate, respectively, and is rubbed to align the liquid crystal layer.

In order to manufacture the liquid crystal display, a plurality of thin film deposition processes, a photolithography process, and an etching process must be performed. In particular, in order to fabricate a thin film transistor, a color filter layer, and a black matrix layer, a photoresist is deposited, a photoresist pattern is formed by an exposure and development process using a mask, and then an etching process is performed using the photoresist pattern as a mask. However, such a photoresist pattern forming process has a problem in that a manufacturing process such as aligning a mask is complicated and not suitable for a large area display device.

Therefore, in recent years, a printing method capable of easily forming a patterned photoresist pattern without an exposure process has been proposed.

Hereinafter, the printing method will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a conventional printing apparatus.

In the conventional printing apparatus, as illustrated in FIG. 1, a cliché 1 into which a printing material is inserted to form a printing pattern R, and a substrate 3 on which the printing pattern R is to be formed. And the print pattern R received from the stage 2 and the cliché 1 and transferred to the substrate 3 on the stage 2 to form the print pattern R on the substrate 3. It consists of the roller 4 for doing so.

Here, the clit body 1 is formed with a plurality of concave grooves H into which a printing material such as a resist is inserted, and the stage 2 on which the substrate 3 is placed is mutually different from the clit body 1. It is connected and a roller 4 can be positioned on the stage 2.

That is, the roller 4 moves the printing pattern R filled in the concave groove H of the cliché 1 onto the substrate 3 while moving between the stage 2 and the cliché 1. It is attached.

Referring to the printing method of the printing pattern using a conventional printing device configured as described above in detail.

2A and 2C are cross-sectional views of a printing process using a conventional printing equipment.

The conventional printing process includes a step of inserting a printing material into a groove (H) in which a shape for the printing pattern (R) is largely formed, embedding the printing pattern (R) on the roller (4), and Rolling the roller (4) on the substrate (3) is formed on the substrate (3) to form a printing pattern (R) on the substrate (3).

In detail, as shown in FIG. 2A, after the printing material is coated on the cliché 1 in which the plurality of grooves H are formed, the printing material is coated using a doctor blade 10. Push flat on the cliché (1).

In this case, the printing material is inserted only into the recessed grooves H of the cliché 1, and the printing material is removed in other places, whereby the printing pattern R is formed.

Subsequently, as shown in FIG. 2B, the printing pattern R formed in the groove H of the cliché 1 is buried in the roller 4 while rolling the roller 4 over the cliché 1. . The printing pattern R on the roller 4 follows the printing pattern R formed on the cliché 1 as it is.

Thereafter, as shown in FIG. 2C, the roller 4 on which the printing pattern R is formed is rolled on the substrate 3 to transfer the printing pattern R onto the substrate 3 as it is.

In this way, the printed pattern R formed in the said cliché 1 is printed on the said board | substrate as it is.

However, the conventional printing apparatus for liquid crystal display devices has the following problems.

In the conventional printing apparatus for liquid crystal display devices, since the printed pattern formed on the cliché is simply transferred onto the substrate as it is, the printed pattern is formed at an undesired position of the substrate when the substrate is deformed through a heat treatment process or the like. There was this.

The present invention has been made to solve the above problems, forming an elastic member on the outer circumferential surface of the roller, built-in a piezoelectric element that increases or decreases according to the magnitude of the voltage applied to the elastic member to the elastic member of the substrate It is an object of the present invention to provide a printing apparatus for a liquid crystal display device which can change the position of a printing pattern on the elastic member according to the degree of change of the substrate by expanding or contracting according to the degree of change.

The printing apparatus for a liquid crystal display device according to the present invention for achieving the above object comprises a cliché and the printing material is selectively inserted to form a printing pattern; A stage on which a substrate on which the printed pattern is to be formed is placed; A roller for receiving a printing pattern from the cliché and transferring the printed pattern to a substrate on a stage; An elastic member attached to an outer circumferential surface of the roller and having a plurality of piezoelectric elements formed therein; A displacement measuring unit which senses a distance between the alignment keys formed on the substrate and measures a change in the size of the substrate to output a displacement signal; In response to the displacement signal output from the displacement measuring unit, a voltage is applied to a plurality of piezoelectric elements embedded in the elastic member, and the elastic member is disposed between the X axis, the Y axis, or between the X axis and the Y axis according to the size change of the substrate. It characterized in that it comprises a control unit for contracting and expanding in each direction.

Here, the elastic member is characterized by using an elastic material such as silicone rubber or urethane.

The elastic member may further include a displacement sensor that detects and measures the size change of the piezoelectric element and outputs a feedback signal to the controller.

The displacement measuring unit may use an alignment key checking camera used in the bonding process of the liquid crystal display.

The piezoelectric element is characterized in that formed in the plurality of perpendicular to each other in the X-axis and Y-axis direction inside the elastic member.

The elastic member is characterized in that it is formed so as not to completely surround the outer peripheral surface of the roller.

The printing material is characterized by using a resist.

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

3 is a schematic configuration diagram of a printing apparatus for a liquid crystal display according to an exemplary embodiment of the present invention, FIG. 4 is a schematic configuration diagram of the elastic member of FIG. 3, and FIG. 5 is elastic due to a change in size of a piezoelectric element. It is sectional drawing of the roller for demonstrating the change of a member and the change of a printing pattern.

According to an exemplary embodiment of the present invention, a printing apparatus for a liquid crystal display device includes: a cliché 101 into which a printing material is inserted to form a printing pattern R as shown in FIG. 3; A stage 102 on which a substrate 300 on which the printed pattern R is to be formed is placed; A roller 400 for receiving a printing pattern R from the cliché 101 and transferring the printed pattern R to the substrate 300 on the stage 102; An elastic member 400a attached to an outer circumferential surface of the roller 400 and having a plurality of piezoelectric elements 400b embedded therein; A displacement measuring unit 202 which senses a distance between the alignment keys formed on the substrate 300 and measures a change in size of the substrate 300 to output a displacement signal; Receiving the displacement signal output from the displacement measuring unit 202 to apply a voltage to a plurality of piezoelectric elements (400b) built in the elastic member (400a) to increase or decrease the piezoelectric element (400b) to the elastic The member 400a is configured as a control unit 201 for contracting and expanding the X-axis, the Y-axis, or the direction between the X-axis and the Y-axis in accordance with the size change of the substrate 300.

Although not shown in the drawings, a lower portion of the stage 102 further includes a driving shaft for moving the stage 102 in the direction between the X and Y axes, and a driving motor for driving the driving shaft. .

Here, a plurality of grooves H are formed in the cliché 101, and a printing material such as a resist is inserted into the grooves H.

In addition, the stage 102 is connected to the cliché 101, so that the roller 400 on which the print pattern R is buried rolls through the clece 101 and immediately passes the print pattern R. It is possible to continuously print on the substrate 300.

That is, the roller 400 moves between the stage 102 and the cliché 101 while printing patterns R filled in the concave grooves H of the cliché 101 on the substrate 102. It acts as a paste.

In addition, the roller 400 has a cylindrical shape, and an elastic member 400a is formed along the circumference of the outer circumferential surface of the roller 400, and the printing pattern R is formed on the surface of the elastic member 400a. Stuck.

Here, the elastic member 400a is formed so as not to completely surround the circumference of the outer circumferential surface of the roller 400 with some clearance 400c.

This is because when the elastic member 400a expands along the circumference of the roller 400, the ends of the elastic member 400a may interfere with each other in the expansion direction.

On the other hand, since the roller 400 has a much larger diameter than the length of the clece 101, the roller 400 makes one rotation while the roller 400 rolls over the entire surface of the clece 101. As a result, the free space 400c does not contact the print pattern R of the cliché 101.

The substrate 300 is divided into a display area and a non-display area, and the display area includes a plurality of gate lines and a plurality of data lines arranged perpendicularly to each other, and a portion at which the gate lines and the data lines cross each other. A thin film transistor and the like are formed in the non-display area, and the non-display area is a region in which a pad for applying a driving signal to the gate line and the data line is formed. The display area 22 is divided into an active area in which an actual image is displayed, and a liquid crystal margin area surrounding a periphery of the active area.

An alignment key is formed at an edge of the non-display area of the substrate 300, and the displacement measuring unit 202 detects a change in the size of the substrate 300 by checking the position of the alignment key. The measurement outputs the displacement signal.

Here, the alignment key is formed to accurately bond the substrate 300 to another opposite substrate (not shown).

Here, the align key is formed at four corners of the non-display area of the substrate 300. When the substrate 300 is contracted or expanded by heat treatment applied during the deposition process, the ratio of the substrate 300 is increased. The distances between the alignment keys formed in the display area also become close to each other or far from each other.

Therefore, the displacement measuring unit 202 measures how much the substrate 300 has changed in the X-axis, the Y-axis, or between the X-axis and the Y-axis by measuring the distance between the alignment keys.

Here, the displacement measuring unit 202 may be replaced by using a camera for checking the position of the alignment key in the conventional bonding process of the liquid crystal display.

In addition, the control unit 201 is information on the magnitude of the voltage to be applied to the piezoelectric element 400b with respect to the amount of change in the X-axis, the Y-axis or the direction between the X-axis and the Y-axis of the substrate 300. And a lookup table containing a, and receiving a displacement signal output from the displacement measuring unit 202 to the X-axis, the Y-axis or the X-axis and the Y-axis of the substrate 300 from the look-up table. Read the magnitude change and output the corresponding voltage.

Here, the voltage output from the control unit 201 may be transmitted by a wire connected to each of the piezoelectric elements 400b through the center of the roller 400.

In addition, a plurality of piezoelectric elements 400b are arranged in the X-axis direction and the Y-axis direction in the elastic member 400a, and the piezoelectric elements 400b may be formed according to the voltage output from the controller 201. Increases or decreases in size

Specifically, the piezoelectric elements 400b arranged in the X-axis direction are stretched or reduced in the X-axis direction, and the piezoelectric elements 400b arranged in the Y-axis direction are stretched or reduced in the Y-axis direction, as described above. Due to the size change of the piezoelectric element 400b, the elastic member 400a in which the piezoelectric element 400b is embedded also has its size contracted or expanded in the X-axis, Y-axis, or each direction between the X-axis and the Y-axis.

Here, a displacement sensor 500 is formed at one side of each piezoelectric element 400b to detect and measure a change in the size of the piezoelectric element 400b and output a feedback signal to the controller 201.

The displacement sensor 500 is a device for compensating for the characteristics of the piezoelectric element 400b which is difficult to change to a desired size at a time by the voltage output from the controller 201.

That is, the displacement sensor 500 detects and measures how much the size of the piezoelectric element 400b is changed by the voltage output from the controller 201 and sends a feedback signal to the controller 201. The control unit 201 receives the feedback signal and calculates how much voltage should be applied to the piezoelectric element 400b in order to change the piezoelectric element 400b to a desired size. Will be applied.

Here, the feedback signal output from each displacement sensor 500 may be transmitted by a wire connected to the control unit 201 through the center of the roller 400.

As described above, the elastic member 400a expands or contracts in the X-axis, Y-axis, or each direction between the X-axis and the Y-axis in synchronization with the size change of the piezoelectric element 400b formed therein. Therefore, the printing pattern R formed on the elastic member 400a may be moved in an X-axis, a Y-axis, or an angle between the X-axis and the Y-axis.

Here, it is preferable that the elastic member 400a uses an elastic material such as silicone rubber or urethane so that the elastic member 400a can be easily changed in response to the size change of the piezoelectric element 400b.

On the other hand, when the elastic member 400a is centered on the piezoelectric element 400b, the lower elastic member 400a firmly attached to the outer circumferential surface of the roller 400 and the printing pattern R are buried. The upper elastic member 400a may be classified. When the size of the piezoelectric element 400b formed inside the elastic member 400a is changed, the lower elastic member 400a is firmly formed on the surface of the roller 400. Since the change amount is small, the upper single member 400a is fixed only to the piezoelectric element 400b, and thus is easily changed according to the size change of the piezoelectric element 400b.

Therefore, the elastic member 400a simultaneously satisfies the requirement to be firmly attached to the roller 400 and also to be easily changed according to the size change of the piezoelectric element 400b.

The operation of the printing apparatus for a liquid crystal display according to the present invention configured as described above will be described in detail as follows.

6A and 6F are cross-sectional views of a printing process using the printing apparatus for a liquid crystal display according to the embodiment of the present invention.

First, the substrate 300a having the semiconductor material deposited on the front surface is seated and fixed to the stage 102.

Thereafter, as shown in FIG. 6A, after the printing material is applied to the surface of the first cliché 101a on which the pattern for the semiconductor layer is formed, the printing material is removed using a doctor blade 800. The applied first cleece 101a is pushed flat.

In this case, the printing material is inserted only into the recessed grooves H of the first cliché 101a, and the printing material formed in the remaining part is removed, and the first cliché 101 is printed on the semiconductor layer. The pattern R is formed.

Subsequently, as shown in FIG. 6B, the roller 400 is rolled on the first body 101a while the first printing pattern R1 is formed in the groove H of the first body 101a. Is buried in the elastic member 400a of the roller 400.

Then, the first printed pattern R1 formed on the first cleavage 101a is directly buried on the surface of the elastic member 400a.

Subsequently, as the roller 400 having the first printed pattern R1 formed thereon is rolled onto the substrate 300a, the first printed pattern R1 buried in the elastic member 400a of the roller 400 is rolled. The first printed pattern R1 is formed on the semiconductor material 500 of the substrate 300a and is formed on the substrate 300a as shown in FIG. 6C.

At the same time, the displacement measuring unit 202 checks the position of the alignment key formed at the edge of the substrate 300a, and the initial distance between the alignment keys in the X-axis direction of the substrate 300a and the Y of the substrate 300a. The initial distance between the alignment keys in the axial direction is measured to temporarily store information about the initial distance between the alignment keys in the X, Y or Y directions.

Subsequently, as illustrated in FIG. 6D, the substrate 300a is detached from the stage 102, and the semiconductor material 500 is patterned by using the first printed pattern R1 as a mask. ).

Subsequently, the substrate 300a is transferred to a chamber, and a material such as a silicon enhanced chemical vapor deposition (PECVD) is deposited on the entire surface of the substrate 300a including the semiconductor layer 500a. In the process, the gate insulating film 600 is formed by depositing, and the gate material 700 is sequentially deposited on the entire surface of the gate insulating film 600.

Subsequently, the substrate 300a is mounted on the stage 102 of the printing apparatus again to form the gate electrode and the storage electrode on the substrate 300a on which the gate insulating film 600 and the gate material 700 are deposited. And fix.

Next, as shown in FIG. 6E, a second clincher 101b having a pattern for the gate electrode and the storage electrode is prepared, and as described above, a printing material is selectively added to only the groove H. By inserting the second printed pattern (R2) for the gate electrode and the storage electrode is formed.

In addition, the roller 400 rolls on the second cleaving body 101b so that the second printing pattern R2 is formed on the surface of the elastic member 400a of the roller 400.

At this time, the movement of the roller 400 on which the second printed pattern R2 is formed is stopped, and the alignment key of the substrate 300a seated and fixed to the stage 102 by using the displacement measuring unit 202. Measure and compare the distance between the currently measured alignment key and the initial alignment key previously measured and stored.

Of course, the distance between the alignment keys in the X-axis direction and the alignment keys in the Y-axis direction of the substrate 300a are compared.

As a result, when there is a difference in the distance between the currently measured alignment key and the previously measured alignment key, the displacement measuring unit 202 determines the difference between the distance between the previous alignment key and the current alignment key. Outputs a displacement signal containing information corresponding to

Here, it is assumed that the substrate 300a expands only in the Y-axis direction so that only the distance between the alignment keys in the Y-axis direction is increased.

Then, the control unit 201 receives the displacement signal and reads a voltage corresponding to the distance difference stored in a look-up table (not shown), and sets the voltage in the Y-axis direction formed in the elastic member 400a. It is applied to the piezoelectric elements 400b arranged in this manner.

Here, the controller 201 outputs a voltage of positive polarity (+) when the distance between the current alignment keys is greater than the distance between the previous alignment keys, and the distance between the current alignment keys is the previous alignment key. If the distance is smaller than the distance between the negative (-) voltage is output.

Here, since it is assumed that the distance between the current alignment keys of the substrate 300a is greater than the distance between the previous alignment keys, and only the distance between the alignment keys in the Y-axis direction is increased, the control unit 201 outputs the distance. The voltage being a positive voltage is applied to the piezoelectric element 400b arranged in the Y-axis direction among the piezoelectric elements 400b.

Then, the piezoelectric element 400b in the Y-axis direction extends in the Y-axis direction according to the applied positive voltage, and thus the elastic member 400a containing the piezoelectric element 400b in the Y-axis direction is also included. It expands in the Y-axis direction.

Here, the displacement sensor 500 is formed on one side of the piezoelectric element 400b, as described above. The displacement sensor 500 is a device for compensating for the characteristics of the piezoelectric element 400b which is difficult to change to a desired size at a time by the voltage output from the controller 201.

That is, the displacement sensor 500 detects and measures how much the size of the piezoelectric element 400b is changed by the voltage output from the controller 201 and sends a feedback signal to the controller 201. The control unit 201 receives the feedback signal and calculates how much voltage should be applied to the piezoelectric element 400b in order to change the piezoelectric element 400b to a desired size. Is applied to change the piezoelectric element 400b by a desired size.

Therefore, the elastic member 400a incorporating the piezoelectric element 400b also expands in the Y-axis direction due to the size change of the piezoelectric elements 400b arranged in the Y-axis direction. The distance between the second print patterns R2 formed on the surface also increases in the Y-axis direction.

Thus, as shown in (b) of FIG. 6F, the printing pattern R is formed at the correct position of the expanded substrate 300a.

6F illustrates a non-expanded steady state substrate 300b, and the printed pattern R` formed on the unexpanded steady state elastic member 400a is printed on the substrate 300b. 6F (b) shows a substrate 300a expanded in the Y-axis direction, and the second printed pattern R2 formed on the elastic member 400a expanded in the Y-axis direction on the substrate 300a. Is printed.

As can be seen from the printing pattern R ′ indicated by the dotted line formed in (b) of FIG. 6F, the printing pattern R ′ formed on the elastic member 400a in the steady state on the substrate 300a expanded on the Y axis. ) Is printed, the printed pattern (R`) is formed completely out of the semiconductor layer 500a, so that the gate electrode formed thereafter also completely leaves the semiconductor layer 500a.

Thus, by expanding the elastic member 400a in the direction in which the substrate 300a is expanded, the second printing pattern R2 can be printed exactly where desired.

Thereafter, the gate material is etched using the second printed pattern R2 as a mask to form a gate electrode and a storage electrode.

Impurities are implanted using the gate electrode and the storage electrode as masks to form source and drain regions on both sides of the semiconductor layer 500a, and are formed on the entire surface of the substrate including the source and drain regions and the storage electrode. The first interlayer insulating film and the conductive layer are sequentially formed.

Subsequently, it is checked whether the first interlayer insulating film and the substrate on which the conductive layer is formed are changed through the above-described process, and accordingly, the printing pattern of the pixel electrode on the upper portion of the conductive layer is increased or decreased. And selectively remove the conductive layer using the printed pattern as a mask to form a pixel electrode overlapping the storage electrode.

Next, a second interlayer insulating film and a protective layer are sequentially formed on the entire surface of the substrate including the pixel electrode.

Subsequently, it is checked whether the substrate on which the second interlayer insulating film and the protective layer are formed is changed through the above-described process, and accordingly, the source region and the drain region of the semiconductor layer 500a are increased or decreased. After forming a printing pattern for a source contact hole, a drain contact hole and a pixel contact hole on the passivation layer corresponding to a part of the pixel electrode, the first interlayer insulating film and the second interlayer using the printing pattern as a mask. The insulating layer and the protective layer are removed to form a source region and a drain region of the semiconductor layer 500a, a source contact hole and a drain contact hole exposing a portion of the pixel electrode, and a pixel contact hole.

Next, a metal layer is deposited on the entire surface of the substrate on which the source contact hole, the drain contact hole, and the pixel contact hole are formed.

Subsequently, it is checked whether the substrate on which the metal layer is formed is changed through the above-described process, and accordingly, the printing pattern of the first electrode and the second electrode on the metal layer is increased or decreased by increasing or decreasing the distance between the printing patterns formed on the roller. The metal layer is selectively removed using the printed pattern as a mask to form a first electrode connecting the source region and the drain region and a second electrode connecting the drain region and the pixel electrode.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The printing apparatus for a liquid crystal display device according to the present invention described above has the following effects.

In the printed circuit board for a liquid crystal display device according to the present invention, an elastic member is formed on an outer circumferential surface of a roller, and a piezoelectric element that is increased or decreased according to the magnitude of the voltage applied to the elastic member is built in the printed circuit board. By expanding or contracting accordingly, the position of the resist buried in the elastic member can be changed according to the degree of change of the substrate.

Therefore, even if the size of the substrate changes, the printed pattern can be formed accurately at the desired position of the substrate, thereby preventing the incorrect patterning of the layer due to misalignment of the resist.

1 is a schematic configuration diagram of a conventional printing apparatus

2a and 2c is a cross-sectional view of the printing process using a conventional printing equipment

3 is a schematic configuration diagram of a printing apparatus for a liquid crystal display according to an embodiment of the present invention.

4 is a schematic configuration diagram of the elastic member of FIG.

5 is a cross-sectional view of the roller for explaining the change of the elastic member and the change of the printing pattern by the size change of the piezoelectric element;

6A and 6F are cross-sectional views of a printing process using a printing apparatus for a liquid crystal display device according to an embodiment of the present invention.

* Explanation of symbols on the main parts of the drawings

101: cliché 102: stage

201: control unit 202: displacement measuring unit

300: substrate 400: roller

400a: elastic member 400b: piezoelectric element

H: Groove R: Print Pattern

Claims (7)

A clit body in which printing material is selectively inserted to form a printing pattern; A stage on which a substrate on which the printed pattern is to be formed is placed; A roller for receiving a printing pattern from the cliché and transferring the printed pattern to a substrate on a stage; An elastic member attached to an outer circumferential surface of the roller and having a plurality of piezoelectric elements formed therein; A displacement measuring unit which senses a distance between the alignment keys formed on the substrate and measures a change in the size of the substrate to output a displacement signal; In response to the displacement signal output from the displacement measuring unit, a voltage is applied to a plurality of piezoelectric elements embedded in the elastic member, and the elastic member is disposed between the X axis, the Y axis, or between the X axis and the Y axis according to the size change of the substrate. A printing apparatus for a liquid crystal display device, comprising a control unit for contracting and expanding in each direction. The method of claim 1, The elastic member is a printing apparatus for a liquid crystal display device, characterized in that using an elastic material such as silicone rubber or urethane. The method of claim 1, And the elastic member further comprises a displacement sensor for sensing and measuring a change in the size of the piezoelectric element and outputting a feedback signal to the controller. The method of claim 1, And the displacement measuring unit uses an alignment key checking camera used in the bonding process of the liquid crystal display. The method of claim 1, And a plurality of piezoelectric elements are formed perpendicular to each other in the X-axis and Y-axis directions within the elastic member. The method of claim 1, The elastic member is a printing apparatus for a liquid crystal display device, characterized in that formed so as not to completely surround the outer peripheral surface of the roller. The method of claim 1, The printing material is a printing apparatus for a liquid crystal display device, characterized in that using a resist.