KR102218379B1 - Unit of measuring quantity of liquid crystal and apparatus of dispensing liquid crystal with the same - Google Patents

Abstract

The present invention relates to a liquid crystal ejection device. In the liquid crystal discharging apparatus according to an embodiment of the present invention, a base and a head provided above the base to discharge liquid crystal to a substrate, and a liquid crystal positioned on the base to measure the weight of the liquid crystal discharged from the head Including a measuring unit, wherein the liquid crystal measuring unit is connected to a container accommodating the liquid crystal, a discharge pipe that is coupled to the inside of the container to discharge liquid crystal to the outside, a scale body that measures the weight of liquid crystal in the container, and the discharge pipe, and is connected to the outside of the container. It includes a valve positioned and a pressure reducing member connected to the valve and discharging the liquid crystal to the outside by providing a negative pressure inside the container, wherein the discharge pipe is provided extending from top to bottom in the container, and the end has a suction port. It includes a liquid crystal discharge device to be formed.

Description

A liquid crystal measuring unit, and a liquid crystal discharging device including the same TECHNICAL FIELD OF THE INVENTION

The present invention relates to a liquid crystal measuring unit for measuring a liquid crystal discharge amount and a liquid crystal discharge device including the same.

In recent years, liquid crystal displays have been widely used in display units of electronic devices such as mobile phones and portable computers. A liquid crystal display includes a color filter substrate on which a black matrix, a color filter, a common electrode, and an alignment layer are formed; A liquid crystal layer is formed between the thin film transistor (TFT), the pixel electrode, and the array substrate on which the alignment layer is formed, and an image effect is obtained using the difference in refractive index of light according to the anisotropy of the liquid crystal.

As a method of forming a liquid crystal layer between the color filter substrate and the array substrate, there is a liquid crystal injection method or a liquid crystal dropping method. The liquid crystal injection method is a method in which a color filter substrate and an array substrate are bonded to each other by spaced apart from each other, and a liquid crystal is injected into a space therebetween for filling. The liquid crystal dropping method is a method of dropping liquid crystal in a display area defined by the seal line after forming a seal line in a seal line area on a color filter substrate or an array substrate. The color filter substrate and the array substrate on which the liquid crystal is dropped are aligned and pressed so that the dropped liquid crystal spreads evenly over the entire surface, and the color filter substrate and the array substrate are bonded by curing the seal pattern through ultraviolet (UV) and heat treatment processes. .

On the other hand, in the measuring unit for measuring liquid crystal, the liquid crystal must be removed from the container after measuring the discharge amount of the liquid crystal. To remove the liquid crystal, remove the liquid crystal in the container by pulling out the container and then use the container again. This process is done manually, so there is a problem that it takes a long time to work.

In addition, when discharging the liquid crystal from the container to the outside, it can be discharged by connecting a discharge pipe to the lower part of the container. In this case, some of the discharged liquid crystal may remain inside the discharge pipe. The liquid crystal measuring unit is provided as an electronic scale capable of measuring the weight of liquid crystal to a scale of µg. Therefore, there is a problem in that the liquid crystal partially remaining in the discharge pipe connected to the lower part of the container hinders precise measurement when measuring the weight of the liquid crystal.

The present invention is to provide a liquid crystal measuring unit for effectively measuring a discharge amount of liquid crystal discharged from a liquid crystal discharge device, and a liquid crystal discharge device including the same.

The present invention provides a liquid crystal ejection device.

According to an embodiment of the present invention, the liquid crystal discharging device includes a base and a head provided on the base and discharging liquid crystal to a substrate, and a weight of the liquid crystal discharged from the head. Including a liquid crystal measuring unit for measuring, wherein the liquid crystal measuring unit is connected to a container for accommodating liquid crystal, a discharge pipe for discharging the liquid crystal outside the container, and a balance body for measuring the weight of liquid crystal in the container, and the discharge pipe, and the container And a pressure reducing member connected to the valve located outside of the container and discharging the liquid crystal to the outside by providing a negative pressure inside the container, wherein the discharge pipe is provided extending from top to bottom in the container, and the end Silver inlet may be formed.

According to an embodiment, the discharge pipe may be provided by being connected to a side wall of the container.

According to an embodiment, the discharge pipe may have an inclined portion that is provided to be inclined downward as it moves away from the sidewall of the container.

According to an embodiment, the suction port may be provided at an end of the inclined portion, and may be provided as an inclined surface with respect to a horizontal surface.

According to an embodiment, the liquid crystal measuring unit further includes a cover unit, and the cover unit includes a housing with an upper portion open and a cover for opening and closing an upper portion of the housing, but the container may be located inside the housing. .

The present invention provides a liquid crystal measuring unit.

According to an embodiment of the present invention, the liquid crystal measuring unit is connected to a container accommodating liquid crystal, a discharge pipe coupled to the inside of the container to discharge liquid crystal to the outside, a scale body measuring the weight of liquid crystal in the container, and the discharge pipe, and the A valve located outside the container and a pressure reducing member connected to the valve and discharging the liquid crystal to the outside by providing a negative pressure inside the container, wherein the discharge pipe is provided extending from top to bottom in the container, The end may be formed with a suction port.

According to one embodiment, the discharge pipe may be provided by being connected to the upper end of the container.

According to an embodiment, the discharge pipe may have an inclined portion that is provided to be inclined downward as it moves away from the sidewall of the container.

According to an embodiment, the suction port may be provided at an end of the inclined portion, and may be provided as an inclined surface with respect to a horizontal surface.

According to an embodiment, the liquid crystal measuring unit further includes a cover unit, and the cover unit includes a housing with an upper portion open and a cover for opening and closing an upper portion of the housing, but the container may be located inside the housing. .

According to an embodiment of the present invention, when the liquid crystal is discharged to the outside in the container of the liquid crystal measurement unit, it is formed through a separate device to improve the measurement efficiency of the liquid crystal measurement unit.

In addition, according to an embodiment of the present invention, when the liquid crystal is discharged to the outside in the container of the liquid crystal measuring unit, it is made through a separate device, thereby reducing the working speed.

1 is a diagram showing the configuration of an inkjet liquid crystal coating equipment.
2 is a perspective view of a liquid crystal discharge unit of FIG. 1.
3 is a plan view of a liquid crystal discharge unit of FIG. 1.
4 is a view showing nozzles of the head of FIG. 2.
5 is a side view of the head moving unit of FIGS. 2 and 3.
6 is a front view of the first moving unit of FIG. 5.
7 is a perspective view of the liquid crystal measurement unit of FIG. 2.
8 is a cross-sectional view of the liquid crystal measurement unit of FIG. 7.
9 is a cross-sectional view showing a container in the liquid crystal measurement unit of FIG. 7.
10 is a plan view of a liquid crystal measurement unit.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This embodiment is provided to more completely describe the present invention to those with average knowledge in the art. Therefore, the shape of the element in the drawings has been exaggerated to emphasize a clearer description.

1 is a diagram showing the configuration of an inkjet liquid crystal coating equipment.

The liquid crystal coating equipment 1 of FIG. 1 is an equipment for applying liquid crystal to a substrate in an ink jet method for discharging liquid crystal. The substrate may be a color filter (CF) substrate or a thin film transistor (TFT) substrate of a liquid crystal display panel, and the liquid crystal may be applied on the entire surface of a color filter (CF) substrate or a thin film transistor (TFT) substrate.

Referring to FIG. 1, the liquid crystal coating equipment 1 includes a liquid crystal discharge unit 10, a substrate transfer unit 20, a loading unit 30, an unloading unit 40, a liquid crystal supply unit 50, and a control unit 90. Includes. The liquid crystal discharge unit 10 and the substrate transfer unit 20 are arranged in a line in the first direction 12.

The first direction 12 is the arrangement direction of the liquid crystal discharge unit 10 and the substrate transfer unit 20, the second direction 14 is a direction perpendicular to the first direction 12 on a horizontal plane, and the third direction 16 ) Is a direction perpendicular to the first direction 12 and the second direction 14.

The liquid crystal discharge unit 10 and the substrate transfer unit 20 may be positioned adjacent to each other. A substrate transfer unit 20 is positioned on one side of the liquid crystal discharge unit 10. A liquid crystal supply unit 50 and a control unit 90 are disposed on the other side of the liquid crystal discharge unit 10. The liquid crystal supply unit 50 and the control unit 90 are disposed at a position facing the substrate transfer unit 20. The liquid crystal supply unit 50 and the control unit 90 are located side by side in the second direction 14.

On the other side of the substrate transfer unit 20, a loading unit 30 and an unloading unit 40 are positioned. The loading unit 30 and the unloading unit 40 are provided at positions facing the liquid crystal discharge unit 10. The loading unit 30 and the unloading unit 40 are positioned side by side in the second direction 14.

The substrate on which the liquid crystal is to be applied is carried into the loading unit 30. The substrate transfer unit 20 transfers the substrate carried in the loading unit 30 to the liquid crystal discharge unit 10. The liquid crystal discharge unit 10 receives liquid crystal from the liquid crystal supply unit 50 and discharges the liquid crystal onto the substrate in an inkjet method of discharging the liquid crystal. When the liquid crystal discharge is completed, the substrate transfer unit 20 transfers the substrate from the liquid crystal discharge unit 10 to the unloading unit 40. The substrate on which the liquid crystal is applied is carried out from the unloading unit 40. The controller 90 controls the overall operation of the liquid crystal discharge unit 10, the substrate transfer unit 20, the loading unit 30, the unloading unit 40, and the liquid crystal supply unit 50.

2 is a perspective view of a liquid crystal discharge unit of FIG. 1. 3 is a plan view of a liquid crystal discharge unit of FIG. 1. 2 and 3, the liquid crystal discharge unit 10 includes a base 1800, a substrate support unit 100, a gantry 200, a gantry moving unit 300, heads 400, a head moving unit ( 500), a liquid crystal supply unit 600, a liquid crystal measurement unit 800, a nozzle inspection unit 900, and a head cleaning unit 1000.

The base 1800 may be provided in a rectangular parallelepiped shape having a predetermined thickness. A substrate support unit 100 is disposed on the upper surface of the base 1800. The substrate support unit 100 has a support plate 110 on which the substrate S is placed. The support plate 110 may be a rectangular plate. A rotation driving member 120 is connected to the lower surface of the support plate 110. The rotation driving member 120 may be a rotation motor. The rotation driving member 120 rotates the support plate 110 about a rotation center axis perpendicular to the support plate 100.

When the support plate 110 is rotated by the rotation driving member 120, the substrate S may be rotated by the rotation of the support plate 110. When the long side direction of the cell formed on the substrate on which the liquid crystal is to be applied faces the second direction 14, the rotation driving member 120 may rotate the substrate so that the long side direction of the cell faces the first direction 12.

The support plate 110 and the rotation driving member 120 may be linearly moved in the first direction 12 by the linear driving member 130. The linear driving member 130 includes a slider 132 and a guide member 134. The rotation driving member 120 is installed on the upper surface of the slider 132. The guide member 134 extends long in the first direction 12 in the center of the upper surface of the base 1800. A linear motor (not shown) may be built into the slider 132. The slider 132 is linearly moved in the first direction 12 along the guide member 134 by a linear motor (not shown).

The gantry 200 is provided above the path through which the support plate 110 is moved. The gantry 200 may be provided in a rectangular parallelepiped shape. The gantry 200 is spaced apart from the upper surface of the base 1800 in the upward direction. The gantry 200 is disposed such that its length direction faces the second direction 14.

The gantry moving unit 300 linearly moves the gantry 200 in the first direction 12. The gantry moving unit 300 includes a first moving unit 310 and a second moving unit 320. The first moving unit 310 is provided at one end of the gantry 200, and the second moving unit 320 is provided at the other end of the gantry 200. The first moving unit 310 slides along the guide rail 315 provided on one side of the base 1800. The second moving unit 320 slides along the guide rail 325 provided on the other side of the base 1800 and linearly moves the gantry 200 in the first direction 12.

The heads 400 discharge liquid crystal droplets onto the substrate. A plurality of heads 400 may be provided. The heads 400 are coupled to the gantry 200 in a row in the second direction 14. The heads 400 are coupled to the gantry 200 by the head moving unit 500. The heads 400 linearly move in the longitudinal direction of the gantry 200, that is, in the second direction 14 by the head moving unit 500. It can also be moved linearly in the third direction 16. Each of the heads 400 may rotate about an axis parallel to the third direction 16 with respect to the head moving unit 500.

Referring to FIG. 4, a plurality of nozzles 410a and 410b for discharging liquid crystal droplets are provided on the bottom surfaces of the heads 400. For example, 128 or 256 nozzles 410a and 410b may be provided on the head 410. The nozzles 410a and 410b may be arranged in a line at intervals of a predetermined pitch. The nozzles 410a and 410b may discharge liquid crystal in an amount of µg.

Each of the heads 400 may be provided with as many piezoelectric elements as the number corresponding to the nozzles 410a and 410b. The droplet discharge amounts of the nozzles 410a and 410b may be independently adjusted by controlling the voltage applied to the piezoelectric elements.

The head moving unit 500 may be provided to individual heads 400, respectively. In the case of this embodiment, an example in which three heads 410, 420, and 430 are provided will be described. Since three heads 410, 420, and 430 are provided, three head movement units 500 may also be provided to correspond to the number of heads 410, 420, and 430. Alternatively, one head moving unit 500 may be provided, and in this case, the heads 400 may be moved integrally rather than individually. Unlike this, a plurality of head moving units 500 may be provided corresponding to the number of heads 400 provided.

5 is a side view of the head moving unit of FIGS. 2 and 3, and FIG. 6 is a front view of the first moving unit of FIG. 5.

5 and 6, the head moving unit 500 includes a first moving unit 520 and a second moving unit 540. The first moving unit 520 linearly moves the individual head 410 in the second direction 14 which is the length direction of the gantry 200. The second movement unit 540 linearly moves the individual head 410 in the third direction 16 or rotates about an axis parallel to the third direction 16.

The first moving unit 520 includes guide rails 522a and 522b, sliders 524a and 524b, and a moving plate 526. The guide rails 522a and 522b are provided to extend elongated in the second direction 14. The guide rails 522a and 522b may be installed to be spaced apart in the third direction 16 on the front surface of the gantry 200. Sliders 524a and 524b are movably coupled to the guide rails 522a and 522b. The sliders 524a and 524b are provided with a linear actuator. As an example, the linear driver may be provided with a linear motor (not shown). The moving plate 526 is coupled to the sliders 524a and 524b. The upper region of the moving plate 526 is coupled to the slider 524a located thereon. The lower region of the moving plate 526 is coupled to the slider 524b located below. The moving plate 526 moves linearly in the second direction 14 along the guide rails 522a and 522b by a driving force of a linear motor (not shown), as shown in FIG. 6. In this way, as the heads 410, 420, and 430 are individually moved along the second direction 14, the spacing between the heads 410, 420, and 430 may be adjusted.

The second moving unit 540 includes a guide member 542, a slider 544, a detector 546 and a controller 548. The guide member 542 is coupled to the moving plate 526 of the first moving unit 520. The guide member 542 guides the linear movement of the slider 544 in the third direction 16.

The slider 544 is coupled to the guide member 542 so as to move linearly in the third direction 16 or rotatably about an axis parallel to the third direction 16. The slider 544 may be provided with a linear actuator. For example, the linear driver may be provided as a linear motor (not shown). In addition, the slider 544 may have a built-in rotation driver. The head 410 is coupled to the slider 544 and is moved in the third direction 16 by linear movement of the slider 544 in the third direction 16.

The detector 546 may be installed on the gantry 200. The detector 546 detects the gap between the head 410 and the substrate S. The detector 546 may be provided as a laser sensor.

The controller 548 generates a control signal corresponding to the detection signal of the detector 546. After generating the control signal, the controller 548 controls driving of the linear motor by transmitting the control signal to the linear motor built in the slider 544. If it is determined that the distance between the head 410 and the substrate S is out of the preset reference value according to the detection result of the detector 546, the controller 548 controls the drive of the linear motor (not shown) to control the head 410 ) And the substrate (S).

Referring back to FIG. 3, the liquid crystal supply unit 600 includes a liquid crystal supply module 620 and a pressure control module 640. The liquid crystal supply module 620 and the pressure control module 640 may be coupled to the gantry 200. The liquid crystal supply module 620 receives liquid crystal from the liquid crystal supply unit 50 and supplies liquid crystal to the individual heads 410, 420, and 430. The pressure control module 640 controls the pressure of the liquid crystal supply module 620 by providing positive pressure or negative pressure to the liquid crystal supply module 620.

The liquid crystal measurement unit 800 measures the amount of liquid crystal discharged from the individual heads 410, 420, and 430. The liquid crystal measurement unit 800 may be disposed on one side of the substrate support unit 100 on the base 1800. The liquid crystal measurement unit 800 measures the amount of liquid crystal discharged from all of the nozzles 410a and 410b for each individual head 410, 420, and 430. By measuring the liquid crystal discharge amount of the individual heads 410, 420, and 430, it is possible to macroscopically check whether or not the nozzles 410a, 410b of the individual heads 410, 420, and 430 are abnormal. That is, when the liquid crystal discharge amount of the individual heads 410, 420, and 430 is out of the reference value, it can be seen that at least one of the nozzles 410a and 410b has an abnormality.

7 is a perspective view of the liquid crystal measurement unit of FIG. 2, FIG. 8 is a cross-sectional view of the liquid crystal measurement unit of FIG. 7, FIG. 9 is a cross-sectional view showing a container in the liquid crystal measurement unit of FIG. 7, and FIG. 10 is a plan view of the liquid crystal measurement unit to be.

Hereinafter, referring to FIGS. 7 to 10, the liquid crystal measurement unit 800 includes a measurement unit 1100, a cover unit 1300, a sealing unit 1500, and a dustproof unit 1700. The measurement unit 1100 is located on the base 1800. The measurement unit 1100 measures the weight of the liquid crystal contained in the container 1111 to be described later. The cover unit 1300 opens and closes the measurement unit 1100 from the upper side of the measurement unit 1100. The sealing unit 1500 is provided between the measurement unit 1100 and the cover unit 1300. The anti-vibration unit 1700 is provided between the base 1800 and the measurement unit 1100.

The measuring unit 1100 includes a container 1111, a shelf 1113, a scale body 1115, a discharge pipe 1116, a valve 1117, and a pressure reducing member 1118. The container 1111 is provided in a cylindrical shape with an open top. For example, the container 1111 may be provided in a cylindrical shape. Alternatively, the container 1111 may be provided in the shape of a rectangular parallelepiped. An accommodation space AS is provided inside the container 1111. The liquid crystal discharged from the head 410 is accommodated in the accommodation space AS. The shelf 1113 supports the lower part of the container 1111. The shelf 1113 may be integrally coupled with the container 1111. The scale body 1115 is provided on the lower side of the shelf 1113. The scale body 1115 interlocks with the shelf 1113 to measure the weight of the liquid crystal contained in the container 1111. The scale body 1115 may be provided as an electronic scale capable of measuring the weight of liquid crystal up to a scale of µg.

The discharge pipe 1116 discharges the liquid crystal into the container 1111 to the outside. The discharge pipe 1116 is provided by being coupled to the side wall of the container 1111. The discharge pipe 1116 is provided connected to the upper region of the side wall of the container 1111.

The discharge pipe 1116 includes a horizontal portion 1116a and an inclined portion 1116b. The horizontal portion 1116a is provided to extend in the inner direction of the container 1111 in an area above the side wall of the container 1111. The end of the horizontal portion 1116a is connected to the inclined portion 1116b. The inclined portion 1116b is provided to be inclined downward as the distance from the side wall of the container 1111 is increased.

A suction port 1119 is formed at the end of the inclined portion 1116b. The suction port 1119 sucks the liquid crystal into the upper portion of the discharge pipe 1116 in the container 1111. The end of the suction port 1119 is provided as an inclined surface 1119a. The inclined surface 1119a is provided to be inclined upward toward the side wall of the container 1111. The liquid crystal can be more effectively sucked into the container 1111 than when the end of the suction port 1119 is provided in an inclined plane and provided in a horizontal plane.

The valve 1117 is installed in the discharge pipe 1116. The valve 1117 closes the discharge pipe 1116 when measuring liquid crystal in the container 1111. When the liquid crystal is discharged to the outside through the discharge pipe 1116 in the container 1111, the valve 1117 is opened. The valve 1117 is located adjacent to the outside of the container 1111.

The decompression member 1118 provides a negative pressure inside the container 1111 to discharge liquid crystal to the outside. The pressure reducing member 1118 is provided in connection with the discharge pipe 1116. For example, the pressure reducing member 1118 may be provided as a pump. In contrast, the pressure reducing member 1118 may be provided as a device for providing a negative pressure inside the container 1111 in addition to a pump.

There is an effect of shortening the liquid crystal measurement time in the liquid crystal measuring unit 800 because it is not necessary to manually empty the liquid crystal inside the container 1111 with the discharge pipe 1116 and the pressure reducing member 1118 provided in the container 1111.

The cover unit 1300 includes a housing 1310, a cover 1321, and a driver 1331.

The housing 1310 includes a first frame 1311, a second frame 1313, a third frame 1315 and a fourth frame 1317.

The first frame 1311, the second frame 1313, the third frame 1315, and the fourth frame 1317 are each provided in a plate shape. The first frame 1311 and the second frame 1313 are provided at predetermined intervals from the upper side of the measurement unit 1100 in the first direction 12. The third frame 1315 and the fourth frame 1317 are provided at a predetermined interval from the upper side of the measurement unit 1100 in the second direction 14. The fourth frame 1317 is placed in parallel in the first direction 12 at one side between the first frame 1311 and the second frame 1313. The third frame 1315 is placed in parallel with the fourth frame 1317 at the middle of the first frame 1311 and the second frame 1313. The third frame 1315 divides the first frame 1311 and the second frame 1313 into a first space S1 and a second space S2. A container 1111 and a shelf 1113 are placed in the first space S1. A driver 1331, which will be described later, is disposed in the second space S2. A support bracket 1316 protruding in the direction of the second space S2 is provided on the side of the third frame 1315. A driver 1331 to be described later is placed on the support bracket 1316.

The cover 1321 is provided in a plate shape. A first rail member 1323 is provided at one end of the cover 1321. The first rail member 1323 includes a first side plate 1323a, a second side plate 1323b, and a connecting member 1323c. The first side plate 1323a extends from one end of the cover 1321 in a downward direction parallel to the third direction 16. The width of the first side plate 1323a in the first direction 12 is the same as the width of the cover 1321 in the first direction 12. The second side plate 1323b is parallel to the first side plate 1323a, but spaced at a predetermined interval in the direction of the third frame 1315. The connecting member 1323c connects the first side plate 1323a and the second side plate 1323b. The connecting member 1323c may be provided in a plate shape parallel to the cover 1321.

The second rail member 1318 is provided on an upper end of one side of the fourth frame 1317. The second rail member 1318 provides a space in which the connecting member 1323c of the first rail member 1323 and the second side plate 1323b are fitted to slide.

The driver 1331 rests on the support bracket 1316. Alternatively, the driver 1331 may be directly coupled to the third frame 1315. The driver 1331 moves the cover 1321 in the first direction 12. The cover 1321 and the driver 1331 are connected by brackets 1333 and 1335. The first bracket 1333 extends from the other end of the cover 1321 in a downward direction parallel to the third direction 16. The second bracket 1335 is parallel to the second direction 14 at the lower end of the first bracket 1333 and extends in the direction of the second space S2 so as to be away from the frame 1315. The second bracket 1335 may be directly connected to the driver 1331. The actuator 1331 may be provided as a cylinder. Alternatively, the driver 1331 may be provided as a linear motor.

The sealing unit 1500 includes a plate 1510 and a sealing member 1530. The plate 1510 is provided between the measurement unit 1100 and the cover unit 1300. A hole through which the shelf 1113 of the measurement unit 1100 passes is formed in the plate 1510. The shelf 1113 passes through the hole and partially is exposed upward of the plate 1510.

The sealing member 1530 is provided between the shelf 1113 and the hole. The sealing member 1530 is provided corresponding to the circumferential shape of the shelf 1113. For example, the sealing member 1530 may be provided in a circular ring shape. The sealing member 1530 seals between the shelf 1113 and the hole so that airflow that may flow between the upper surface of the scale body 1115 and the lower surface of the plate 1510 does not affect the shelf 1113.

The vibration isolating unit 1700 includes a support plate 1710 and a vibration isolating member 1730. The support plate 1710 supports the lower portion of the scale body 1115 of the measurement unit 1100. The support plate 1710 may be provided in a plate shape. For example, the support plate 1710 is provided in a rectangular plate shape.

A plurality of anti-vibration members 1730 are provided on the lower edge of the support plate 1710. As an example, the anti-vibration member 1730 may be provided on the lower surface of the corner portion of the support plate 1710, respectively. The vibration isolating member 1730 prevents the vibration of the base 1800 from being transmitted to the measurement unit 1100. For example, the anti-vibration member 1730 may be provided in a gel type. Alternatively, the anti-vibration member 1730 may be provided in a spring type.

Referring back to FIGS. 2 and 3, the heads 410, 420, and 430 are moved in the first direction 12 and the second direction 14 by the gantry moving unit 300 and the head moving unit 500, so that the liquid crystal measuring unit It can be located on top of (800). The head moving unit 500 may adjust the vertical distance between the heads 410, 420, and 430 and the liquid crystal measuring unit 800 by moving the heads 410, 420, and 430 in the third direction 16.

The nozzle inspection unit 900 checks whether or not the individual nozzles provided to the heads 410, 420, and 430 are abnormal through optical inspection. When it is determined that there is an abnormality in an unspecified nozzle as a result of checking whether there is an abnormality in the macroscopic nozzle in the liquid crystal measurement unit 800, the nozzle inspection unit 900 performs a total inspection on the nozzle while checking the existence of an abnormality in the individual nozzles. You can proceed.

The nozzle inspection unit 900 may be disposed on one side of the substrate support unit 100 on the base 1800. The heads 410, 420, and 430 may be moved in the first direction 12 and the second direction 14 by the gantry moving unit 300 and the head moving unit 500 to be located above the nozzle inspection unit 900. . The head moving unit 500 may adjust the vertical distance between the heads 410, 420, and 430 and the nozzle inspection unit 900 by moving the heads 410, 420, and 430 in the third direction 16.

The head cleaning unit 1000 performs a purging process and a suction process. The purging process is a process of injecting part of the liquid crystal accommodated in the heads 410, 420, and 430 at high pressure. The suction process is a process of sucking and removing liquid crystal remaining on the nozzle surfaces of the heads 410, 420, and 430 after the purging process.

The detailed description above is illustrative of the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications and environments. That is, changes or modifications may be made within the scope of the concept of the invention disclosed in the present specification, the scope equivalent to the disclosed contents, and/or the skill or knowledge of the art. The above-described embodiments describe the best state for implementing the technical idea of the present invention, and various changes required in the specific application fields and uses of the present invention are possible. Therefore, the detailed description of the invention is not intended to limit the invention to the disclosed embodiment. In addition, the appended claims should be construed as including other embodiments.

1: liquid crystal coating equipment 10: liquid crystal discharge unit
20: substrate transfer unit 30: loading unit
40: unloading unit 50: liquid crystal supply unit
90: control unit 100: substrate support unit
200: gantry 300: gantry moving unit
400: heads 500: head moving unit
600: liquid crystal supply unit 800: liquid crystal measurement unit
900: nozzle inspection unit 1000: head cleaning unit
1100: measuring unit 1111: container
1113: shelf 1115: scale body
1116: discharge pipe 1117: valve
1118: decompression member 1119: inlet
1300: cover unit 1500: sealing unit
1700: anti-vibration unit 1800: base

Claims (10)

In the liquid crystal ejection device,
Bass; and
A head provided on the top of the base and discharging liquid crystal to the substrate; And
Located on the base, comprising a liquid crystal measuring unit for measuring the weight of the liquid crystal discharged from the head,
The liquid crystal measurement unit,
A container containing liquid crystal,
A discharge pipe coupled to the inside of the container to discharge the liquid crystal to the outside,
A scale body for measuring the weight of liquid crystal in the container,
A valve connected to the discharge pipe and located outside the container, and
And a decompression member connected to the valve and providing a negative pressure inside the container to discharge the liquid crystal to the outside,
The discharge pipe is provided extending from top to bottom in the container, and an end of the liquid crystal discharge device having a suction port. The method of claim 1,
The discharge pipe is provided by being connected to a side wall of the container. The method of claim 2,
The discharge pipe is a liquid crystal discharging device having an inclined portion provided to be inclined downward as a distance from the side wall of the container. The method of claim 3,
The suction port is provided at the end of the inclined portion, the liquid crystal discharging device provided as an inclined surface with respect to the horizontal plane. The method according to any one of claims 1 to 4,
The liquid crystal measurement unit further includes a cover unit,
The cover unit,
A housing with an open top,
Including a cover for opening and closing the upper portion of the housing,
The container is a liquid crystal discharge device located inside the housing. In the liquid crystal measurement unit,
A container that contains liquid crystal
A discharge pipe that is bonded to the inside of the container and discharges the liquid crystal to the outside;
A scale body for measuring the weight of liquid crystal in the container,
A valve connected to the discharge pipe and located outside the container
And a decompression member connected to the valve and providing a negative pressure inside the container to discharge the liquid crystal to the outside,
The discharge pipe is provided extending from top to bottom in the container, and a liquid crystal measuring unit having an end formed with a suction port. The method of claim 6,
The discharge pipe is a liquid crystal measurement unit provided by being connected to the side wall of the container. The method of claim 6,
The discharge pipe is a liquid crystal measuring unit having an inclined portion that is provided to be inclined downward as the distance from the side wall of the container. The method of claim 8,
The suction port is provided at the end of the inclined portion, the liquid crystal measuring unit provided as an inclined surface with respect to the horizontal plane. The method according to any one of claims 6 to 9,
The liquid crystal measurement unit further includes a cover unit,
The cover unit,
A housing with an open top,
Including a cover for opening and closing the upper portion of the housing,
The container is a liquid crystal measuring unit located inside the housing.

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