KR20050061280A - Apparatus and method of dispensing liquid crystal - Google Patents

Abstract

The liquid crystal dropping method of the present invention comprises the steps of loading a substrate onto the stage, aligning the liquid crystal droppings provided on the guide bar to the dropping position of the substrate, dropping the liquid crystal onto the substrate, and unloading the substrate from the stage. It consists of a process.

Description

Liquid crystal dropping device and liquid crystal dropping method {APPARATUS AND METHOD OF DISPENSING LIQUID CRYSTAL}

The present invention relates to a liquid crystal dropping device and a liquid crystal dropping method, and in particular, the liquid crystal dropping device is mounted on a guide bar moving in one direction, and then moved in a different direction from the moving direction of the guide bar along the guide bar. The present invention relates to a liquid crystal dropping device and a liquid crystal dropping method capable of quickly dropping a liquid crystal at a desired position on a substrate.

Recently, with the development of various portable electronic devices such as mobile phones, PDAs, and notebook computers, there is a growing demand for flat panel display devices for light and thin applications. Such flat panel displays are being actively researched, such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), FED (Field Emission Display), VFD (Vacuum Fluorescent Display), but mass production technology, ease of driving means, Liquid crystal display devices (LCDs) are in the spotlight for reasons of implementation.

LCD is a device for displaying information on the screen using the refractive anisotropy of the liquid crystal. As shown in FIG. 1, the LCD 1 is composed of a lower substrate 5 and an upper substrate 3 and a liquid crystal layer 7 formed between the lower substrate 5 and the upper substrate 3. The lower substrate 5 is a drive element array substrate. Although not shown in the figure, a plurality of pixels are formed on the lower substrate 5, and a driving element such as a thin film transistor (hereinafter referred to as TFT) is formed in each pixel. The upper substrate 3 is a color filter substrate, and a color filter layer for real color is formed. In addition, a pixel electrode and a common electrode are formed on the lower substrate 5 and the upper substrate 3, respectively, and an alignment film for aligning liquid crystal molecules of the liquid crystal layer 7 is coated.

The lower substrate 5 and the upper substrate 3 are bonded by a sealing material 9, and a liquid crystal layer 7 is formed therebetween by a driving element formed on the lower substrate 5. Information is displayed by controlling the amount of light passing through the liquid crystal layer by driving the liquid crystal molecules.

The manufacturing process of the liquid crystal display device can be largely divided into a driving element array substrate process of forming a driving element on the lower substrate 5, a color filter substrate process of forming a color filter on the upper substrate 3, and a cell process. However, the process of the liquid crystal display will be described with reference to FIG. 2.

First, a plurality of gate lines and data lines arranged on the lower substrate 5 to define a pixel region are formed by a driving element array process, and the gate line and the data are formed in each of the pixel regions. A thin film transistor which is a driving element connected to the line is formed (S101). In addition, the pixel electrode is connected to the thin film transistor through the driving element array process to drive the liquid crystal layer as a signal is applied through the thin film transistor.

In addition, the upper substrate 3 is formed with a color filter layer and a common electrode of R, G, B to implement the color by the color filter process (S104).

Subsequently, an alignment layer is applied to the upper substrate 3 and the lower substrate 5, respectively, and then the alignment control force or the surface fixing force is applied to the liquid crystal molecules of the liquid crystal layer 7 formed between the upper substrate 3 and the lower substrate 5. Rubbing is performed on the alignment layer to provide a pretilt angle and an orientation direction (S102 and S105). Subsequently, a spacer is disposed on the lower substrate 5 to maintain a constant cell gap, and a sealing material 9 is applied to an outer portion of the upper substrate 3, and then the lower substrate 5 is disposed. And the upper substrate 3 by applying pressure (S103, S106, S107).

On the other hand, the lower substrate 5 and the upper substrate 3 is made of a large area glass substrate. In other words, a plurality of panel regions are formed on a large area glass substrate, and a TFT and a color filter layer, which are driving elements, are formed in each of the panel regions. Must be processed (S108). Thereafter, the liquid crystal is injected into the liquid crystal panel processed as described above through the liquid crystal inlet, and the liquid crystal inlet is encapsulated to form a liquid crystal layer. Then, the liquid crystal display is manufactured by inspecting each liquid crystal panel (S109 and S110). .

The liquid crystal is injected through the liquid crystal inlet formed in the panel. At this time, the injection of the liquid crystal is made by the pressure difference. 3 shows an apparatus for injecting liquid crystal into the liquid crystal panel. As shown in FIG. 3, a container 12 filled with liquid crystal is provided in a vacuum chamber 10, and a liquid crystal panel 1 is positioned on an upper portion thereof. The vacuum chamber 10 is connected to a vacuum pump to maintain a set vacuum state. In addition, although not shown in the drawing, an apparatus for moving the liquid crystal panel is installed in the vacuum chamber 10 to move the liquid crystal panel 1 from the upper part of the container 12 to the container, and thus the injection hole 16 formed in the liquid crystal panel 1. ) Is brought into contact with the liquid crystal 14 (this method is referred to as a liquid crystal dipping injection method).

As described above, when nitrogen (N ₂ ) gas is supplied into the vacuum chamber 10 while the injection port 16 of the liquid crystal panel 1 is in contact with the liquid crystal 14, the vacuum degree of the chamber 10 is reduced. The liquid crystal 14 is injected into the panel 1 through the injection hole 16 by the pressure difference between the pressure inside the liquid crystal panel 1 and the vacuum chamber 10 and the liquid crystal is completely filled in the panel 1. The liquid crystal layer is formed by sealing the injection hole 16 with a sealing material (this method is called vacuum injection of liquid crystal).

However, the method of forming the liquid crystal layer by injecting liquid crystal through the injection hole 16 of the liquid crystal panel 1 in the vacuum chamber 10 as described above has the following problems.

First, the liquid crystal injection time to the panel 1 is long. In general, the distance between the driving element array substrate and the color filter substrate of the liquid crystal panel is very narrow, such as several μm, so that only a very small amount of liquid crystal is injected into the liquid crystal panel per unit time. For example, when a liquid crystal panel of about 15 inches is manufactured, it takes about 8 hours to completely inject the liquid crystal. The liquid crystal panel manufacturing time is lengthened by the long-term liquid crystal injection, thereby lowering the manufacturing efficiency.

Second, the liquid crystal consumption rate is high in the liquid crystal injection method as described above. Of the liquid crystals 14 filled in the container 12, the amount injected into the liquid crystal panel 1 is a very small amount. Meanwhile, when the liquid crystal is exposed to the atmosphere or a specific gas, the liquid crystal not only deteriorates by reacting with the gas, but also deteriorates due to impurities introduced upon contact with the liquid crystal panel 1. Therefore, even when the liquid crystal 14 filled in the container 12 is injected into the plurality of liquid crystal panels 1, the liquid crystal 14 remaining after the injection must be discarded. This leads to an increase in manufacturing cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object thereof is to provide a liquid crystal dropping device and a liquid crystal dropping method for directly dropping a liquid crystal onto a large glass substrate including at least one liquid crystal panel.

Another object of the present invention is to provide a liquid crystal dropping device and a liquid crystal dropping method capable of rapidly dropping a liquid crystal at an accurate dropping position by moving the liquid crystal dropping in the x, y-direction.

In order to achieve the above object, the liquid crystal dropping apparatus according to the consistent point of the present invention is a liquid crystal dropping apparatus for dropping the liquid crystal onto the stage and the substrate in which the substrate is loaded and moved in the first direction. It is composed of a guide bar provided.

The liquid crystal dropper comprises a discharge pump for sucking and discharging liquid crystal and a nozzle for dropping liquid crystal discharged from the discharge pump on a substrate, wherein the discharge pump is inserted into the cylinder having a suction port and a discharge port, As the groove is formed and driven in the air, a piston is formed to suck and discharge the liquid crystal through the suction port and the discharge port.

In addition, the liquid crystal dropping apparatus according to another aspect of the present invention includes a stage on which the substrate is placed and moves in the first direction, and at least one liquid crystal dropping droplet dropping the liquid crystal onto the substrate and moving in the second direction. And a control unit for placing the liquid crystal dropper at the set dropping position of the substrate. The control unit includes a load setting unit for setting a dropping amount and a dropping position of the liquid crystal dropped on the substrate, a driving unit for placing the liquid crystal dropping in the dropping position, and a motor driving unit for dropping the liquid crystal onto the substrate by operating liquid crystal dropping. The driving unit includes a coordinate calculation unit that calculates the dripping coordinates based on the dripping position input from the dripping amount setting unit. The driving unit may include a guide bar driver and a substrate driver for moving the guide bar to position the liquid crystal droplets in the coordinates calculated by the coordinate calculation unit.

In addition, the liquid crystal dropping method according to the present invention comprises the steps of loading a substrate onto the stage, aligning the liquid crystal droppings provided on the guide bar to the dropping position of the substrate, dropping the liquid crystal onto the substrate, and removing the substrate from the stage. It consists of an unloading process.

The process of loading a substrate on the stage includes aligning the substrate on the stage, and the loaded substrate is fixed to the stage by vacuum adsorption or electrostatic adsorption. In addition, the process of aligning the liquid crystal drop includes moving the liquid crystal drop, which moves in the x-direction. The alignment of the liquid crystal drops further includes a step of moving the guide bar in the y-direction.

In order to overcome the shortcomings of the conventional liquid crystal injection method such as the liquid crystal dipping method or the liquid crystal vacuum injection method, a method proposed in recent years is a liquid crystal layer forming method by the liquid crystal dropping method. The liquid crystal dropping method does not inject the liquid crystal by the pressure difference between the inside and the outside of the panel, but directly drops and dispenses the liquid crystal onto the substrate, and uniformly spreads the liquid crystal dropped by the bonding pressure of the panel. The liquid crystal layer is formed by distribution. Since the liquid crystal dropping method directly drops the liquid crystal onto the substrate for a short time, the liquid crystal layer formation of the large area liquid crystal display device can be performed very quickly, and only the required amount of liquid crystal is directly dropped onto the substrate. Since it is possible to minimize the consumption of the liquid crystal display device has the advantage that can significantly reduce the manufacturing cost.

4 is a view showing a basic concept of the liquid crystal dropping method. As shown in the figure, in the liquid crystal dropping method, before the lower substrate 105 and the upper substrate 103 on which the driving element and the color filter are formed, respectively, the liquid crystal 107 is droplet-shaped on the lower substrate 105. Dropping The liquid crystal 107 may be dropped on the substrate 103 on which the color filter is formed. In other words, the substrate to be the liquid crystal dropping method in the liquid crystal dropping method can be either a TFT substrate or a CF substrate. However, when the substrates are bonded, the substrate on which the liquid crystal is dropped must be placed at the bottom.

In this case, a sealing material 109 is applied to the outer region of the upper substrate 103 to apply pressure to the upper substrate 103 and the lower substrate 105 so that the upper substrate 103 and the lower substrate 105 are bonded together. At the same time, droplets of the liquid crystal 107 are spread out by the pressure to form a liquid crystal layer having a uniform thickness between the upper substrate 103 and the lower substrate 105. In other words, the biggest feature of the liquid crystal dropping method is that the liquid crystal 107 is previously dropped on the lower substrate before the panel 101 is bonded, and then the panel is bonded by the sealing material 109.

The liquid crystal display device manufacturing method to which the above liquid crystal dropping method is applied is shown in FIG. 5. As shown in the figure, TFT and color filter layers, which are driving elements, are formed on the lower substrate 150 and the upper substrate 103 through the TFT array process and the color filter process (S201 and S202). The TFT array process and the color filter process are the same as those of the conventional manufacturing method shown in FIG. 2 and are collectively performed on a large-area glass substrate on which a plurality of panel regions are formed. In particular, since the liquid crystal dropping method is applied in the manufacturing method, it can be usefully used in a larger glass substrate, for example, a large area glass substrate having an area of 1000 × 1200 mm ² or more compared with the conventional manufacturing method.

Subsequently, after the alignment film is applied to the lower substrate 105 on which the TFT is formed and the upper substrate 103 on which the color filter layer is formed, rubbing is performed (S202 and S205), the liquid crystal panel region of the lower substrate 105 is formed. 107 is dropped and a sealing material 109 is applied to the liquid crystal panel outer region of the upper substrate (S203, S206).

Thereafter, pressure is applied while the upper substrate 103 and the lower substrate 105 are aligned, and the upper substrate 103 and the lower substrate 105 are bonded together by the sealing material 109 and at the same time the pressure is applied. The liquid crystal 107 dropped by this is spread evenly over the whole panel (S207). Through this process, a plurality of liquid crystal panels having a liquid crystal layer are formed on glass substrates (lower substrates and upper substrates) having a large area. The glass substrates are processed and cut and separated into a plurality of liquid crystal panels. By inspecting, a liquid crystal display device is produced (S208, S209).

Comparing the difference between the method of manufacturing the liquid crystal display device to which the liquid crystal drop method shown in FIG. 5 is applied and the method of manufacturing the liquid crystal display device to which the conventional liquid crystal injection method shown in FIG. 2 is applied, the difference between the vacuum injection and the liquid crystal drop of the liquid crystal and In addition to the difference in the processing time of the large-area glass substrate it can be seen that there are other differences. That is, in the method of manufacturing a liquid crystal display device to which the liquid crystal injection method shown in FIG. 2 is applied, the injection hole must be sealed by an encapsulant after the liquid crystal is injected through the injection hole. This eliminates the need for sealing of these inlets. In addition, although not shown in FIG. 2, in the manufacturing method to which the liquid crystal injection method is applied, since the substrate contacts the liquid crystal when the liquid crystal is injected, the outer surface of the panel is contaminated by the liquid crystal. In the manufacturing method in which the liquid crystal dropping method is applied, since the liquid crystal is directly dropped on the substrate, the panel is not contaminated by the liquid crystal, and as a result, the cleaning process is unnecessary. As described above, the manufacturing method of the liquid crystal display device by the liquid crystal dropping method is made of a simple process by the manufacturing method by the liquid crystal injection method, so that not only the manufacturing efficiency can be improved but also the yield can be improved.

In the manufacturing method of the liquid crystal display device in which the liquid crystal dropping method is introduced as described above, the most important factors for accurately forming the liquid crystal layer to a desired thickness are the position of the liquid crystal to be dropped and the amount of liquid crystal dropping. In particular, since the thickness of the liquid crystal layer has a close relationship with the cell gap of the liquid crystal panel, the accurate dropping position and the dropping amount of the liquid crystal are very important factors for preventing defects of the liquid crystal panel. Therefore, there is a need for an apparatus for dropping the correct amount of liquid crystal at the correct position, and the present invention provides such liquid crystal droplets.

6 is a view showing a basic concept of dropping the liquid crystal 107 on the substrate (large area glass substrate) 105 using the liquid crystal drop according to the present invention. As shown in the figure, the liquid crystal droplets 120 are provided on the substrate 105. Although not shown in the figure, the liquid crystal is filled in the liquid crystal dropper 120 to fill a predetermined amount on the substrate.

FIG. 7 is a perspective view showing the structure of the liquid crystal dropper 120 according to the present invention, and FIG. 8 is a perspective exploded view of the liquid crystal dropper 120. As illustrated in FIGS. 7 and 8, in the liquid crystal dropper 120, a cylindrical liquid crystal container 122 is accommodated in the case 123. The liquid crystal container 122 is made of polyethylene, and the liquid crystal 107 is filled therein, and the case 123 is made of stainless steel so that the liquid crystal container 122 is formed therein. It is stored. In general, polyethylene is mainly used as the liquid crystal container 122 because it is easy to form a container having a desired shape because of its excellent moldability and does not react with the liquid crystal when the liquid crystal 107 is filled. However, since the polyethylene is weak in strength, the polyethylene is easily deformed by a weak external shock. In particular, when polyethylene is used as the liquid crystal container 122, the container 122 may be deformed to drop the liquid crystal 107 in the correct position. Since it is not present, it is stored in a case 123 made of stainless steel with high strength, and used.

On the other hand, although not shown in the figure, a gas supply pipe is connected to the upper portion of the liquid crystal container 122 is supplied with a gas such as nitrogen from the outside. This gas supply prevents the pressure drop in the region where the liquid crystal is not filled in the liquid crystal container 122 when the liquid crystal is dropped, thereby preventing the liquid crystal dropping.

The liquid crystal container 122 may be formed of a metal such as stainless steel. In this case, since the liquid crystal container 122 is not deformed by an external impact, the outer case 123 is not necessary. Therefore, the manufacturing cost of the liquid crystal dropper 120 can be reduced. As such, when the liquid crystal container 122 is formed of a metal, it is preferable to apply a fluorine resin film therein to prevent the filled liquid crystal 107 from causing a chemical reaction with the metal.

The liquid crystal discharge pump 140 is disposed below the liquid crystal container 122. The liquid crystal discharge pump 140 discharges a predetermined amount of liquid crystal of the liquid crystal container 122 and drops the liquid on the substrate. The liquid crystal is discharged as the liquid crystal discharge pump 140 is connected to the liquid crystal container 122. The liquid crystal suction opening 147 and the liquid crystal suction opening 147 are formed opposite to each other, and the liquid crystal discharge pump 140 operates to discharge the liquid crystal.

As shown in FIG. 8, the first connection pipe 126 is coupled to the liquid crystal suction opening 147. Although the liquid crystal suction opening 147 is inserted and coupled to the first connection pipe 126 in the drawing, the liquid crystal suction opening 147 and the first connection pipe 126 may be coupled by a coupling means such as a screw. One side of the first connection tube 126 is formed with a pin 128 through which the inside is perforated, such as a needle, and the lower portion of the liquid crystal container 122 that outflows the liquid crystal into the first connection tube 126. And pads (not shown) made of a material having strong shrinkage and sealing properties such as butyl rubber series. The pin 128 is inserted into the liquid crystal container 122 through a pad and flows the liquid crystal 107 of the liquid crystal container 122 into the liquid crystal suction opening 147. Since the pad is strongly contracted into the pin 128 when the pin 128 is inserted, the liquid crystal 107 may be prevented from leaking into the insertion region of the pin 128. As such, since the liquid crystal suction opening 147 and the liquid crystal container 122 are fastened by the pins and the pads, the fastening structure is simplified, and as a result, the fastening and detaching can be easily performed.

The liquid crystal suction opening 147 and the first connection pipe 126 may be integrally formed. In this case, the pin 128 is formed in the liquid crystal suction opening 147 and inserted directly into the liquid crystal container 122 through a pad to leak the liquid crystal of the liquid crystal container 122, thereby simplifying the structure.

The nozzle 150 is installed below the liquid crystal discharge pump 140. The nozzle 150 is connected to the liquid crystal discharge port 148 of the liquid crystal discharge pump 140 through the second connection pipe 160 to drop the liquid crystal 107 discharged from the liquid crystal discharge pump 140 on the substrate. .

The second connection pipe 160 may be formed of an opaque material, but may be formed of a transparent material. As described above, the reason for forming the second connection tube 160 made of a transparent material is as follows.

In general, if bubbles are included in the liquid crystal 107 when the liquid crystal is dropped, the amount of drop of the liquid crystal 107 dropped on the substrate cannot be controlled accurately. Therefore, bubbles must be removed when the liquid crystal 107 is dropped. Meanwhile, bubbles are already included in the liquid crystal 107 filled in the liquid crystal container 122. Although bubbles in the liquid crystal 107 can be removed by the bubble removing device, it is virtually impossible to remove all bubbles even in this case. In addition, bubbles may be generated when the liquid crystal 107 is introduced into the liquid crystal discharge pump 140 from the liquid crystal container 122. As a result, it is almost impossible to completely remove bubbles from the dropped liquid crystal 107. Therefore, when bubbles are generated, removing bubbles by discontinuing the operation of the liquid crystal droplets may be the best way to prevent defects.

The second connecting tube 160 is formed of a transparent material to easily detect bubbles included in the liquid crystal container 122 or bubbles generated in the liquid crystal container 122 to prevent defects. At this time, the discovery of the bubble may be made by the operator's naked eye, but the first sensor 162 such as a photo coupler on both sides of the second connecting tube 160 to automatically detect the bubble. It will more reliably prevent failure.

On both sides of the nozzle 150 into which the liquid crystal discharged through the second connecting pipe 160 flows, protection parts 152 are installed to prevent the nozzle 150 from being damaged from an external force. The protection part 152 of the lower part of the 150 is provided with a second sensor 154 for detecting whether the liquid crystal dropped from the nozzle 150 contains bubbles or agglomerates of liquid crystal on the surface of the nozzle 150. .

The phenomenon that the liquid crystal agglomerates on the surface of the nozzle 150 prevents the accurate dropping of the liquid crystal 107. When the liquid crystal is dropped through the nozzle 150, even if a predetermined amount of liquid crystal is discharged from the liquid crystal discharge pump 140, some of the liquid crystal is spread onto the surface of the nozzle 150, so that less liquid crystal is dropped on the substrate. In addition, when the liquid crystals agglomerated on the surface of the nozzle 150 are dropped onto the substrate, it may cause a fatal defect of the liquid crystal display device. As such, in order to prevent the liquid crystals from agglomerating on the surface of the nozzle 150, a material (ie, a hydrophobic material) having a high contact angle with respect to the liquid crystal, such as a fluorine resin, is dipping on the surface of the nozzle 150. Or by a spray method. The liquid crystal dropped by the application of the fluorine resin is dropped onto the substrate through the nozzle 150 in the form of a perfect drop without spreading to the surface of the nozzle 150.

On the other hand, the liquid crystal discharge pump 140 is inserted into the rotating member 157, the rotating member 157 is fixed to the fixing portion 155. The rotating member 157 is connected to the first motor 131. As the first motor 131 operates, the rotating member 157 rotates, and the liquid crystal discharge pump 140 fixed to the rotating member 157 operates.

The liquid crystal discharge pump 140 is in contact with one side of the liquid crystal volume adjusting member 134 having a shape such as a bar. The other side of the liquid crystal volume adjustment member 134 is formed with a hole, the rotating shaft 136 is inserted into the hole. A screw is formed around the hole of the liquid crystal volume adjusting member 134 and the rotating shaft 136, and is screwed together. In addition, one end of the rotating shaft 136 is connected to the second motor 133, the other end is connected to the control lever 137.

The amount of liquid crystal discharged from the liquid crystal container 122 through the liquid crystal discharge pump 140 depends on the angle fixed to the rotating member 157. That is, the liquid crystal volume of the liquid crystal discharge pump 140 varies according to the fixed angle fixed to the rotating member 157. When the second motor 133 connected to the rotary shaft 136 is driven (automatically adjusted) or the control lever 137 is operated (manually adjusted), the rotary shaft 136 is rotated, thus rotating screw 136 and the screw One end of the combined liquid crystal volume adjustment member 134 is moved back and forth (straight line) along the rotation axis 136. As such, the force applied to the liquid crystal discharge pump 140 is changed as one end of the liquid crystal volume adjusting member 134 moves, and as a result, the fixed angle of the liquid crystal discharge pump 140 is changed.

As described above, the first motor 131 operates the liquid crystal discharge pump 140 to discharge the liquid crystal of the liquid crystal container 122 to drop the liquid onto the substrate, and the second motor 133 is fixed to the rotating member 157. The fixed angle of the liquid crystal discharge pump 140 is controlled to control the amount of liquid crystal discharged from the liquid crystal discharge pump 140.

On the other hand, the one-time dropping amount of the liquid crystal dropped onto the substrate via the liquid crystal discharge pump 140 is a very fine amount, and thus the amount of change of the liquid crystal discharge pump 140 controlled by the second motor 133 is also a minute amount. This means that the inclination angle of the liquid crystal discharge pump 140 must be adjusted very finely in order to control the discharge amount of the liquid crystal discharge pump 140. For such fine adjustment, the second motor 133 uses a step motor operated by a pulse input value.

9A and 9B are views showing the structure of the liquid crystal discharge pump 140. FIG. 9A is a perspective view and FIG. 9B is an exploded perspective view.

9A and 9B, the liquid crystal discharge pump 140 has a case 141 in which a liquid crystal suction port 147 and a liquid crystal discharge port 148 are formed, and an opening is formed in an upper portion thereof, and is coupled to the case 141. The cap 144 is inserted into the case 141, the cylinder 142 is sucked into the liquid crystal, the sealing means 143 for sealing the cylinder 142, and is located above the cap 144 O-ring (144a) for preventing the leakage of the liquid crystal and the liquid crystal suction opening 147 and the liquid crystal discharge port 148 by being inserted into the cylinder 142 through the opening of the cap 144 to move up and down It consists of a piston 145 for sucking and discharging the liquid crystal 107 through. A head 146a fixed to the rotating member 157 is provided at an upper portion of the piston 145, and a bar 146b is installed at the head 146a. The bar 146b is inserted into and fixed to a hole (not shown) formed in the rotating member 157 so that the piston 145 rotates when the rotating member 157 is rotated by the force of the first motor 131. ) Make the rotary motion.

On the other hand, a groove 145a is formed at the end of the piston 145. The groove 145a is formed in an area of about 1/4 (or less) in the circular cross section of the piston 145 so that the piston 145 rotates (ie, moves up and down) and the liquid crystal suction opening 147. And opening and closing the liquid crystal discharge opening 148 to suck and discharge the liquid crystal through the liquid crystal suction opening 147 and the liquid crystal discharge opening 148.

Referring to the operation of the liquid crystal discharge pump 140 in detail as follows.

10 is a view showing a state in which the liquid crystal discharge pump 140 is fixed to the rotating member 157. As shown in the figure, the piston 145 is fixed to the rotating member 157 at an angle α, and the bar 146b formed on the piston head 146a is a hole formed in the inner surface of the rotating member 157. The piston 145 and the rotary member 157 are inserted into the 159. Although not shown in the drawing, since the bearing is provided inside the hole 159, the bar 146b of the piston 145 inserted into the hole 159 can move back, forth, left, and right. When the first pump 131 operates, the rotating member 157 rotates, and as a result, the piston 145 coupled with the rotating member 157 (that is, fixed) rotates.

At this time, assuming that the fixed angle α of the liquid crystal discharge pump with respect to the rotating member 157, that is, the fixed angle α of the piston 145 with respect to the rotating member 157 is 0, the piston 145 rotates only. Only rotational movement is performed along the member 157. However, since the fixed angle α is not substantially zero (that is, fixed at a constant angle), the piston 145 rotates along the rotational movement of the rotating member 157 and simultaneously moves up and down. Will be.

During the movement of the piston 145, when the piston 145 is rotated by a predetermined angle to move upwards, an empty space is created inside the cylinder 142, and the liquid crystal is sucked into the space through the liquid crystal suction opening 147. As the piston 145 further rotates, the piston 145 moves downward, and the liquid crystal sucked in the cylinder 142 is discharged through the liquid crystal discharge port 148. At this time, the groove 145a formed in the piston 145 serves to open and close the liquid crystal suction opening 147 and the liquid crystal discharge opening 148 during the suction and discharge of the liquid crystal by the rotation of the piston 145.

Hereinafter, the operation of the liquid crystal discharge pump 140 as described above will be described in more detail with reference to FIGS. 11A to 11D.

11A to 11D, the liquid crystal discharge pump 140 discharges the liquid crystal 107 of the liquid crystal container 122 to the nozzle 150 through four strokes. 11A and 11C are cross strokes. FIG. 11B illustrates a suction stroke through the liquid crystal suction port 147 and FIG. 11D illustrates a liquid crystal discharge stroke through the liquid crystal discharge port 148.

As shown in FIG. 11A, the piston 145 fixed to the rotating member 157 at an angle α rotates as the rotating member 157 rotates. At this time, the liquid crystal suction opening 147 and the liquid crystal discharge opening 148 are closed by the piston 145.

As the rotary member 157 rotates about 45 °, the piston 145 also rotates, so that the liquid crystal suction opening 147 is opened by the groove 145a of the piston 145 as shown in FIG. 11B. Meanwhile, the bar 146b of the piston 145 is inserted into the hole 159 of the rotating member 157 to couple the rotating member 157 and the piston 145. Accordingly, the piston 145 rotates as the rotating member 157 rotates, and the bar 146b rotates along the rotational surface.

Since the piston 145 is fixed to the rotating member 157 at an angle and the bar 146b rotates along the rotating surface, the piston 145 is raised as the rotating member 145 rotates. In addition, since the cylinder 142 is fixed, as the rotating member 145 rotates, a space is created in the cylinder 142 below the piston 145. Therefore, the liquid crystal is sucked into the space through the liquid crystal suction opening 147 opened by the groove 145a.

The suction of the liquid crystal is carried out after the suction stroke starts (that is, after the liquid crystal suction opening 147 is opened), until the rotation member 157 rotates about 45 degrees to start the cross stroke as shown in FIG. 11C (liquid crystal suction opening). Until 147 is closed).

Thereafter, as shown in FIG. 11D, as the rotary member 157 is further rotated, the liquid crystal discharge port 148 opens and the piston 145 starts to descend, and is sucked into the space in the cylinder 142. Liquid crystal is discharged through the liquid crystal discharge port 148 (discharge stroke).

As described above, the liquid crystal discharge pump 140 repeats four strokes consisting of a first cross stroke, a suction stroke, a second cross stroke, and a discharge stroke, thereby discharging the liquid crystal 107 filled in the liquid crystal container 122 through the nozzle 150. To be discharged.

At this time, the discharge amount of the liquid crystal depends on the vertical movement range of the piston 145. However, the vertical movement range of the piston 145 varies depending on the angle of the liquid crystal discharge pump 140 fixed to the rotating member 157.

12 is a view showing that the liquid crystal discharge pump 140 is fixed to the rotating member 157 at an angle β. Compared to FIG. 10, in which the liquid crystal discharge pump 140 is fixed to the rotating member 157 at an angle of α (<β), the liquid crystal discharge pump 140 of FIG. 12 allows the piston 145 to move higher in the upward direction. do. This means that as the angle fixed to the rotating member 157 increases, the amount of the liquid crystal 107 sucked into the cylinder 142 during the movement of the piston 145 increases, which is fixed to the rotating member 157. It means that the discharge amount of the liquid crystal can be controlled by adjusting the angle.

Meanwhile, as shown in FIG. 7, the angle of the liquid crystal discharge pump 140 fixed to the rotating member 157 is controlled by the liquid crystal volume adjusting member 134, and the liquid crystal volume adjusting member 134 is provided as a second. As the pump 133 is driven, it moves. In other words, the angle of the liquid crystal discharge pump 140 can be adjusted by controlling the second pump 133.

Of course, the operator may manually adjust the fixed angle of the liquid crystal discharge pump 140 by the angle adjusting lever 137, but in this case, accurate adjustment is not possible and time consuming and stops the liquid crystal discharge pump during the operation. There is also a disadvantage. Therefore, it is preferable that the fixed angle of the liquid crystal discharge pump 140 is adjusted by the second pump 133.

In this case, the fixed angle of the liquid crystal discharge pump 140 is measured by a sensor 139 such as a linear variable differential transformer, and when the fixed angle exceeds the set angle, an alarm is issued to the liquid crystal discharge pump 140. ) To prevent damage.

As described above, the liquid crystal dropper 120 drops the liquid crystal onto the liquid crystal panel formed on the substrate as the liquid crystal discharge pump 140 operates. Generally, a plurality of liquid crystal panels are formed on a substrate. Therefore, in order to improve the efficiency of liquid crystal dropping, it may be desirable to drop the liquid crystal onto the substrate using the plurality of liquid crystal droppings 120.

13 illustrates a liquid crystal dropping device 110 having a plurality of liquid crystal dropping devices 120. As shown in the figure, the stage 114 on which the liquid crystal is dropped is placed on the frame 12 and the guide bar 115 is provided on the stage 114. In addition, a plurality of liquid crystal droppers 120 are mounted on the guide bar 115. In this case, although three liquid crystal droppers 120 are mounted in the drawing, the liquid crystal droppers 120 mounted on the guide bar 115 are not limited to a specific number. In other words, since each of the liquid crystal droppers 120 drops liquid crystal onto the liquid crystal panel formed on the substrate, the number of liquid crystal droppers 120 mounted on the guide bar 115 depends on the number of liquid crystal panels formed on the substrate. Will be different.

The guide bar 115 is equipped with a motor so that the guide bar 115 moves in the y-direction from the top of the stage 114 along the guide rail 160 formed in the stage 114. The liquid crystal drop 120 moves in the y-direction by the movement of the guide bar 115. At this time, the motor mounted on the guide bar 115 is a linear motor.

As shown in FIG. 14, the first linear motor mounted to the guide bar 115 may be inserted into the groove 161 of the guide bar 115 to both side surfaces of the guide rail 160 leading the guide bar 115. A first magnetic bar 164 formed in a band shape and a second magnetic bar 165 formed on an inner surface of the groove 161 of the guide bar 115 to face the first magnetic bar 164 are formed. The first magnetic bar 164 is a fixed magnetic pole, and a signal (for example, an alternating current) is applied to the second magnetic bar 164 such that an electric field is formed between the first magnetic bar 164 and the second magnetic bar 165. Is formed, the guide bar 115 is moved along the guide rail 160 by this electric field. At this time, the moving speed of the guide bar 115 can be controlled by changing the frequency of the AC current. In addition, the guide bar 115 may be moved by using the second magnetic bar 165 as a fixed magnetic pole and applying a signal to the first magnetic bar 164.

Meanwhile, a motor (for example, a linear motor) is installed in each liquid crystal dropper 120 mounted on the guide bar 115 so that the liquid crystal dropper 120 moves along the guide bar 115 in the x-direction. Move. Like the linear motor installed in the guide bar 115, the second linear motor installed in the liquid crystal dropper 120 is composed of two magnetic bars 174 and 175 as shown in FIG. 15, and the magnetic bars 174 and 175. The liquid crystal droplets 120 are moved along the guide bar 115 in the x-direction by the electric field generated by. At this time, the first magnetic bar 174 installed on the guide bar 115 is a stator flux and a signal is applied to the second magnetic bar 175 installed on the liquid crystal drop 120 to move the liquid crystal drop 120. In addition, a signal may be applied to the first magnetic bar 174 installed in the guide bar 115 to move the liquid crystal droplets 120.

At this time, instead of the guide bar 115, the stage 114 is moved in the y-direction by driving means (for example, a motor, etc.) which are not shown, and thus the stage 114 and the liquid crystal droplet 120 are moved. It can be moved relatively in the x and y directions. Also, the stage 114 may move in the x-direction. As such, in order to prevent the substrate placed on the stage 114 from moving away from its original position as the stage 114 moves, the suction hole is connected to a vacuum pump (not shown) in the stage 114. 168 is formed to firmly secure the substrate to the stage 114. On the other hand, although not shown in the drawings, the fixing of the substrate to the stage 114 may be made by electrostatic adsorption using static electricity or vacuum adsorption and electrostatic adsorption using vacuum and static electricity.

As described above, the guide bar 115 or stage 114 moves in the y-direction and the liquid crystals 120 move in the x-direction along the guide bar 115 or the stage 114 moves in the x-direction. Since the liquid crystal droplets 120 are moved in the x and y-directions of the substrate, the liquid crystal droplets 120 can be dropped onto the plurality of liquid crystal panels formed on the substrate by the liquid crystal droplets 120. As described above, the guide bar 115 and the liquid crystal droplets 120 are moved in the x-direction or the y-direction for the following reason.

Recently, liquid crystal display devices are manufactured in various sizes according to application fields such as mobile phones, notebook computers, and LCD TVs. In addition, a mother substrate, ie, a glass substrate, for manufacturing a liquid crystal display device is also manufactured in various sizes to use an efficient substrate according to the size of the liquid crystal panel. Therefore, the position where the liquid crystal is dropped depends on the size of the liquid crystal panel manufactured and the size of the mother substrate on which the liquid crystal panel is formed. In particular, recently, since the MMG (Multi-Model Glass) technique, which manufactures liquid crystal panels of various sizes, has been actively applied to one mother substrate, the dropping positions of liquid crystals dropped onto the substrates are varied. Thus, in order to quickly drop the liquid crystals at various dropping positions, the plurality of liquid crystals are driven in the x, y-direction.

The driving of the guide bar 115 and the driving of the liquid crystal dropper 120 are performed by the controller. The controller not only drives the liquid crystal dropping device 120 but also calculates the drop amount and the dropping position of the liquid crystal, and then controls the liquid crystal dropping device 110 to drop the liquid crystal onto the substrate.

16 illustrates the control unit 200. As shown in the figure, the control unit 200 controls the dripping amount setting unit 210 for setting the dripping amount of the liquid crystal to be loaded on the liquid crystal panel, the first motor 131 and the second motor 133 to control the dripping amount setting unit 210. The motor driving unit 230 which discharges the liquid crystal of the drop amount set by the drop amount setting unit 210 by the liquid crystal discharge pump 140, and the substrate or the guide bar 115 are moved in the y-direction and the liquid crystal is dropped (120). ) Is moved in the x-direction to align the nozzle 150 and the dropping position of the liquid crystal unit 240, and various information such as the size of the substrate and the size of the panel, the liquid crystal drop setting amount, the current dropping amount, the dropping position, etc. It is composed of an output unit 250 for outputting an alarm when an abnormality occurs.

The output unit 250 is composed of a display and a printer such as a CRT (Cathod Ray Tube) or an LCD and not only provides the operator with various types of information about the loading, but also informs the operator of the loading abnormality by an alarm.

The dripping amount setting unit 210 sets the dripping amount of the liquid crystal dropped on the liquid crystal panel. Although the operator may manually input the calculated amount, the optimal dripping amount is automatically set based on various data. It is desirable to set a more precise setting of the dripping amount. That is, on the basis of various data such as the size of the liquid crystal panel to be manufactured, the size and number of liquid crystal panels included in the substrate, the cell gap of the liquid crystal panel (that is, the height of the spacer formed on the liquid crystal panel), and the information on the liquid crystal. The dripping amount of liquid crystal is computed. The information calculated by the drop setting unit 210 calculates the amount of liquid crystals to be dropped onto the entire substrate, the number of liquid crystal droppings, the amount of liquid crystal droppings and the liquid crystal dropping position, instead of the total drop loading to the liquid crystal panel.

As shown in FIG. 17, the driving unit 240 calculates the x, y coordinates (x, y) of the dropping positions at which the liquid crystal is dropped once the dropping position set by the dropping setting unit 210 is input. A guide bar driver (or substrate driver) for driving the substrate (or guide bar) such that the nozzle 242 is positioned on the y coordinate among the calculated coordinates (x, y) by driving the unit 242 and the first linear motor. 244 and a dropper driver for driving the second linear motor to drive the liquid crystal dropper 120 mounted to the guide bar such that the nozzle 150 is positioned on the x coordinate among the calculated coordinates (x, y). 246.

As described above, the nozzle 150 is positioned on the coordinates (x, y) calculated by driving the guide bar driver (or substrate driver) 244 and the drip driver 246, and in this state, the motor driver 230 The liquid crystal is dripped at the dropping position (that is, (x, y) coordinate) set by driving the first motor 131.

In FIG. 13, only one guide bar 115 is formed and the number of liquid crystal droppers 120 mounted on the guide bar 115 is also limited (three in the figure). However, the present invention provides the guide bar 115 and the liquid crystal. It is not limited to the number of dropping 120. In other words, the liquid crystal dropping apparatus of the present invention may be provided with two or more guide bars 115 as necessary, and a plurality of liquid crystal droppers may be mounted on each guide bar 115.

FIG. 18 is a plan view illustrating a liquid crystal dropping device including two guide bars 315a and 315b provided with a plurality of liquid crystal droppers 320a and 320b, respectively. The liquid crystal dropping device having this structure is also loaded with liquid crystals in substantially the same manner as the liquid crystal dropping device shown in FIG. That is, the two guide bars 315a and 315b move along the y-direction, and the liquid crystal droplets 320a and 320b move along the guide bars 315a and 315b in the x-direction. In addition, the stage 314 can also move in the x- and y-directions.

As described above, the provision of two guide bars 315a and 315b is for speeding up the drop of liquid crystal onto a large area substrate. In the liquid crystal dropping device having the above structure, a large area stage 314 is provided, and thus, after loading two substrates onto the stage 314, the guide bars 315a and 315b are independently driven to provide liquid crystal to each substrate. Although it can be driven independently, in the liquid crystal dropping apparatus of the above structure, a liquid crystal dropping is carried out by dropping a liquid crystal onto a substrate with a plurality of liquid crystal droppings provided in two guide bars 315a and 315b on a large area substrate for rapid liquid crystal dropping. will be.

As described above, in the present invention, the liquid crystal drop is moved in the x-direction or the y-direction to drop the liquid crystal onto the substrate, thereby enabling the efficient dropping of the liquid crystal onto the substrate on which the liquid crystal panels of various sizes are formed. Such a liquid crystal dropping method using the liquid crystal dropping apparatus of the present invention will be described with reference to FIG. At this time, the method shown in the drawing is a dropping method by the liquid crystal dropping apparatus shown in FIG. Of course, even in the case of using the liquid crystal dropping apparatus shown in Fig. 13, the process will be substantially similar.

As shown in FIG. 19, a substrate is first loaded into the stage 314 of the liquid crystal dropping device by a loading means such as a robot arm (S301). As described above, when the substrate is loaded on the stage 314, the two guide bars 315a and 315b move in opposite directions along the y-direction and are positioned at the standby position of the outer region of the stage 314, and in this state. At which the large area substrate is loaded into the stage 314. The substrate loaded as described above is vacuum adsorbed (or electrostatic adsorption or vacuum adsorption / electrostatic adsorption) by the adsorption hole 368 formed in the stage 314 and fixed to the stage 314 (S302).

As described above, while the substrate is fixed to the stage 314, the guide bars 315a and 315b move from the standby position along the y-direction to the central region (S303). In addition, the liquid crystal droplets 320a and 320b are moved in the x-direction along the corresponding guide bars 315a and 315b, respectively, so that the liquid crystal droplets 320a and 320b are aligned with the initial liquid crystal dropping positions of the substrate (S304). ). In this case, the stage 314 may move in the x-direction or the y-direction, or move in the x, y-direction to align the nozzle and the liquid crystal dropping position.

As described above, as the discharge pumps of the liquid crystal droplets 320a and 320b operate while the nozzles of the liquid crystal droplets 320a and 320b are aligned with the substrate (S305). On the other hand, once the liquid crystal drop is completed, the liquid crystal drop 320a and 320b moves along the guide bars 315a and 315b in the x-direction, and the stage 314 or the guide bar 315a and 315b moves in the y-direction. The liquid crystal drop is continued to the next position (S306). Thereafter, when the liquid crystal drop is finished, the guide bars 315a and 315b move to the outer region of the stage 314 and unload the substrate from the stage to end the liquid crystal drop. At this time, the guide bars 315a and 315b move back to the initial standby position to unload the substrate from the stage.

The liquid crystals disclosed in the above description have described an example of the present invention, and do not limit the scope of the present invention. In other words, in the present invention, the liquid crystal liquid may be variously configured. Accordingly, the scope of the invention should be determined by the appended claims rather than by the foregoing description.

As described above, in the present invention, since the liquid crystal drop can be moved freely to a desired position by moving the liquid crystal drop in the x and y-directions according to the calculated coordinates, it is possible to prevent a defect due to the liquid crystal drop to an undesired position. Instead, the liquid crystal dropping can be performed quickly.

1 is a cross-sectional view of a general liquid crystal display device.

2 is a flowchart showing a conventional method for manufacturing a liquid crystal display device.

3 is a view showing liquid crystal injection of a conventional liquid crystal display device.

4 is a view showing a liquid crystal display device manufactured by the liquid crystal dropping method according to the present invention.

5 is a flowchart illustrating a method of manufacturing a liquid crystal display device by the liquid crystal dropping method.

6 is a view showing a basic concept of the liquid crystal dropping method.

7 is a perspective view showing the structure of the liquid crystal droplets according to the present invention.

8 is an exploded perspective view showing the structure of the liquid crystal droplets according to the present invention.

Figure 9a is a perspective view showing the structure of the liquid crystal discharge pump of the liquid crystal drop according to the present invention.

9B is an exploded perspective view showing the structure of a liquid crystal discharge pump.

10 is a view showing a state in which the liquid crystal discharge pump is fixed to the fixed portion.

11A to 11D are views showing the operation of the liquid crystal discharge pump.

12 is a view showing a structure of a liquid crystal discharge pump having a fixed angle increased.

FIG. 13 is a view showing a liquid crystal dropping device of the present invention having a guide bar equipped with a plurality of liquid crystal dropping devices. FIG.

14 is an enlarged front view of region A of FIG. 13;

FIG. 15 is an enlarged side view of region B of FIG. 13;

16 is a block diagram showing the structure of a control unit of the liquid crystal dropping apparatus according to the present invention.

17 is a block diagram showing the structure of a drive unit of the liquid crystal dropping apparatus according to the present invention.

18 is a plan view showing the structure of a liquid crystal dropping device provided with a plurality of guides.

19 is a flowchart showing a liquid crystal dropping method using the liquid crystal dropping apparatus according to the present invention.

Explanation of symbols on main parts of drawing

110: liquid crystal dropping device 112: frame

114: stage 115: guide bar

120: liquid crystal drop 122: liquid crystal container

123: Case 128: Pin

131,133: motor 134: liquid crystal volume adjusting member

136: rotation axis 137: control lever

140: liquid crystal discharge pump 142: cylinder

145: piston 145a: groove

147: liquid crystal suction opening 148: liquid crystal discharge opening

149: fixing part 150: nozzle

154, 162: sensor 200: control unit

210: loading amount setting unit 230: motor driving unit

240: drive unit 242: coordinate calculation unit

244 substrate driver 246 loading unit

Claims (60)

Loading the substrate onto the stage; Aligning the liquid crystal droplets provided on the guide bar with the dropping position of the substrate; Dropping liquid crystal onto the substrate; And A liquid crystal dropping method comprising the step of unloading a substrate from a stage. The liquid crystal dropping method of claim 1, further comprising moving the guide bar to a first position. The liquid crystal dropping method of claim 2, wherein the moving of the guide bar to the first position comprises moving the guide bar to a center region of the substrate. The liquid crystal dropping method of claim 2, wherein the moving of the guide bar to the first position comprises moving the guide bar to an outer region of the substrate. The liquid crystal dropping method of claim 1, wherein the loading of the substrate on the stage comprises aligning the substrate on the stage. The liquid crystal dropping method of claim 1, further comprising fixing the substrate loaded on the stage to the stage. 7. The liquid crystal dropping method of claim 6, wherein the substrate is vacuum-adsorbed to a stage. 7. The liquid crystal dropping method according to claim 6, wherein the substrate is electrostatically adsorbed on the stage. 7. The liquid crystal dropping method of claim 6, wherein the substrate is vacuum absorbed and electrostatic absorbed on a stage. The liquid crystal dropping method according to claim 1, wherein the step of aligning the liquid crystal dropping step comprises moving the liquid crystal dropping step. The liquid crystal dropping method of claim 10, wherein the liquid crystal dropping moves in an x-direction. The liquid crystal dropping method according to claim 10, wherein the step of aligning the liquid crystal dropping step further comprises moving the guide bar in the y-direction. The liquid crystal dropping method of claim 12, wherein the liquid crystal dropping is performed simultaneously with the movement of the guide bar. The liquid crystal dropping method of claim 12, wherein the movement of the liquid crystal dropping is performed separately from the movement of the guide bar. The liquid crystal dropping method according to claim 10, wherein the step of aligning the liquid crystal dropping step further comprises a step of moving the stage. The liquid crystal dropping method according to claim 15, wherein the stage moves in the y-direction. The liquid crystal dropping method according to claim 1, wherein the step of aligning the liquid crystal dropping step comprises moving the stage. 18. The liquid crystal dropping method according to claim 17, wherein the stage moves in the y-direction. 18. The liquid crystal dropping method according to claim 17, wherein the step of aligning the liquid crystal dropper further comprises a step of moving the guide bar. 20. The liquid crystal dropping method of claim 19, wherein the guide bar moves in the y-direction. 20. The liquid crystal dropping method of claim 19, wherein the stage and the guide bar move simultaneously. The liquid crystal dropping method according to claim 19, wherein the stage and the guide bar move separately. The process of claim 1, wherein the liquid crystal is dropped onto the substrate. Moving the liquid crystal dropper to align the liquid crystal dropper to the next dropping position; And And dropping the liquid crystal into the dropping position. 24. The liquid crystal dropping method according to claim 23, wherein the liquid crystal dropping moves in the x-direction. The liquid crystal dropping method according to claim 23, wherein the liquid crystal dropping is moved in the y-direction. The liquid crystal dropping method according to claim 23, wherein the liquid crystal dropping is moved in the x-direction and the y-direction. The process of claim 1, wherein the liquid crystal is dropped onto the substrate. Moving the stage to align the liquid crystal droplets with the next dropping position; And A liquid crystal dropping method comprising the step of dropping a liquid crystal. The liquid crystal dropping method according to claim 1, wherein the dropping of the liquid crystal onto the substrate comprises dropping the liquid crystal while moving the guide bar. The liquid crystal dropping method according to claim 1, wherein the dropping of the liquid crystal onto the substrate includes dropping the liquid crystal and dropping the liquid crystal while moving the stage. The liquid crystal dropping method according to claim 1, wherein the dropping of the liquid crystal onto the substrate includes dropping the liquid crystal and dropping the liquid crystal while moving the guide bar. The liquid crystal dropping method according to claim 1, wherein the dropping of the liquid crystal onto the substrate includes dropping the liquid crystal while moving the stage and the guide bar. The liquid crystal dropping method of claim 1, further comprising moving the guide bar to a second position. 33. The liquid crystal dropping method according to claim 32, wherein the second position is an outer region of the stage. The liquid crystal dropping method of claim 1, wherein a plurality of guide bars are provided. The liquid crystal dropping method according to claim 1, wherein a plurality of liquid crystal droppers are provided in the guide bar. According to claim 1, wherein the liquid crystal is A discharge pump that sucks and discharges the liquid crystal; And And a nozzle for dropping the liquid crystal discharged from the discharge pump onto a substrate. The liquid crystal dropping method according to claim 1, further comprising a step of washing the nozzle of the liquid crystal dropping. 38. The liquid crystal dropping method according to claim 37, wherein the step of cleaning the nozzle comprises a step of dripping liquid crystals. 38. The liquid crystal dropping method of claim 37, wherein the cleaning of the nozzle comprises blowing the nozzle. A stage on which the substrate is loaded and moved in the first direction; And A liquid crystal dropping device comprising a guide bar provided with at least one liquid crystal dropper for dropping a liquid crystal onto a substrate and moving in a second direction. The method of claim 40, wherein the liquid crystal A discharge pump that sucks and discharges the liquid crystal; And And a nozzle for dropping the liquid crystal discharged from the discharge pump onto a substrate. The method of claim 41, wherein the discharge pump, A cylinder having a suction port and a discharge port; And And a piston which is inserted into the cylinder and has a groove formed at a lower portion thereof, and comprises a piston for sucking and discharging the liquid crystal through the suction port and the discharge port. 41. The liquid crystal dropping apparatus according to claim 40, further comprising first driving means for moving the stage in a first direction. 41. The liquid crystal dropping apparatus according to claim 40, further comprising a second driving means for moving the liquid crystal dropping. 45. The liquid crystal dropping apparatus according to claim 44, wherein the second driving means is a linear motor. The method of claim 45, wherein the linear motor, A first magnetic bar formed on the guide bar; And And a second magnetic bar formed on the liquid crystal drop, wherein a signal is applied to the first magnetic bar or the second magnetic bar to form an electric field. 41. The liquid crystal dropping apparatus according to claim 40, further comprising a third driving means for moving the guide bar. 48. The liquid crystal dropping apparatus according to claim 47, wherein the third driving means includes a guide rail for guiding the guide bar. 48. The liquid crystal dropping apparatus according to claim 47, wherein the third driving means comprises a linear motor. The method of claim 49, wherein the linear motor, A first magnetic bar formed on the guide rail; And And a second magnetic bar formed in the groove into which the guide rail is inserted, wherein a signal is applied to the first magnetic bar or the second magnetic bar to form an electric field. 41. The liquid crystal dropping apparatus according to claim 40, wherein the first direction is a y-direction. 41. The liquid crystal dropper of claim 40, wherein the second direction is in the x-direction. A stage on which the substrate is placed and moves in a first direction; At least one guide bar having at least one liquid crystal dropper dropping liquid crystal onto the substrate and moving in a second direction; And And a control unit for placing the liquid crystal dropping at a predetermined dropping position of the substrate. The method of claim 53, wherein the liquid crystal is A discharge pump that sucks and discharges the liquid crystal; And And a nozzle for dropping the liquid crystal discharged from the discharge pump onto a substrate. The method of claim 54, wherein the discharge pump, A cylinder having a suction port and a discharge port; And And a piston which is inserted into the cylinder and has a groove formed at a lower portion thereof, and comprises a piston for sucking and discharging the liquid crystal through the suction port and the discharge port. The method of claim 54, wherein the control unit, A dropping amount setting unit for setting a dropping amount and a dropping position of the liquid crystal dropped on the substrate; A driving unit for placing the liquid crystal dropper in the dropping position; And A liquid crystal dropping device comprising a motor driving portion for operating liquid crystal dropping to drop a liquid crystal onto a substrate. 57. The liquid crystal dropping apparatus according to claim 56, wherein the driving unit includes a coordinate calculating unit that calculates a dropping coordinate based on the dropping position input from the dropping setting unit. 59. The liquid crystal dropping apparatus according to claim 56, wherein the driving unit comprises a guide bar driving unit which moves the guide bar to position the liquid crystal dropping by the coordinates calculated by the coordinate calculating unit. 59. The liquid crystal dropping apparatus according to claim 56, wherein the driving unit includes a substrate driving unit which moves the substrate to position the liquid crystal droplets at the coordinates calculated by the coordinate calculating unit. 60. The liquid crystal dropping device of claim 58 or 59, wherein the driving unit further comprises a dropping drive unit which moves the dropping unit along the guide bar and positions the liquid crystal dropping unit at the coordinates calculated by the coordinate calculating unit. Device.