TWI541071B - Liquid-crystal-supply apparatus for liquid-crystal dispenser - Google Patents

Description

Liquid crystal supply device of liquid crystal coater

The present invention relates to a liquid crystal supply device for a liquid crystal coater.

Fig. 1 is a side view schematically showing a liquid crystal coater and a liquid crystal supply device.

As shown in Fig. 1, the liquid crystal coater is mounted in a clean table B which is well known as a mask frame. The liquid crystal supply device is mounted outside the clean bench B.

The liquid crystal coater includes a main frame 100, a platform 200 mounted on the main frame 100, a first guiding unit G1 coupled to the main frame 100 and placed on both sides of the platform 200, and a coating of the first guiding unit G1. a head unit support frame 400, a first driving unit (not shown) for moving the coating head unit support frame 400, a second guiding unit G2 provided to the coating head unit support frame 400, and a second guiding unit A plurality of coating head units 500 of G2, and a second driving device for moving the coating head unit 500.

As shown in FIGS. 1 and 2, each of the coating head units 500 includes a support assembly 510 that connects the second guiding units G2. The bottle insert member 520 is coupled to the support assembly 510. The bottle 530 is inserted into the bottle insert member 520. The cap 540 is coupled to the mouth of the bottle 530 to close the inlet of the bottle 530. A nozzle unit 550 is provided at a lower portion of the support assembly 510. Further, the nozzle connecting tube 560 is connected through the cap 540, thereby supplying the liquid crystal in the bottle 530 to the nozzle unit 550. The cap 540 has an injection passage H for injecting liquid crystal. The injection passage H of the cap 540 includes a common hole h1 vertically formed at the bottom of the cap 540, and a receiving hole h2 passing through the outer periphery of the cap 540 and the common hole h1. The central axis of the common hole h1 is perpendicular to the central axis of the receiving hole h2.

The nozzle unit 550 includes a nozzle 551. The nozzle connection tube 560 is positioned near the bottom of the bottle 530 by the end of the cap.

Reference numeral 570 denotes a connecting member.

The substrate is placed on the platform 200 of the liquid crystal coater. The first driving unit and the second driving unit move the coating head unit 500 according to the preset data. When the coating head unit 500 moves, the liquid crystal passes through the nozzle 551 of the nozzle unit 550 and drops onto the substrate.

If the amount of liquid crystal contained in the bottle 530 is lowered to some extent, the coating head unit 500 is moved to the liquid crystal supply position.

The liquid crystal supply device includes a liquid crystal cell 620 mounted on the substrate 610, a pressure supply unit 630 that supplies pressure to the liquid crystal cell 620, a connection pipe 640 that connects the liquid crystal cell 620 and the pressure supply unit 630, and a liquid crystal that passes through and couples the side wall of the clean bench. The injection unit 700 and the tube 650 that connects the liquid crystal cell 620 and the liquid crystal injection unit 700. The liquid crystal injection unit 700 includes a tube support tube 710. One end of the tube 650 is coupled through the tube support tube 710, and the other end of the tube 650 is connected to the liquid crystal supply slot.

The tube support tube 710 of the liquid crystal injection unit 700 linearly moves forward, and the tube support tube 710 provided with the tube member 650 is inserted into the injection path H of the cap 540 of the bottle 530. At this time, one end of the pipe support pipe 710 passes through the receiving hole h2 of the injection passage H. Furthermore, the pressure supply unit 630 supplies the pressure to the liquid crystal cell 620, so that the liquid crystal stored in the liquid crystal cell 620 passes through the tube 650 and flows into the bottle 530.

When a predetermined amount of liquid crystal is supplied to the bottle 530, the pressure is no longer supplied to the liquid crystal cell 620, and the liquid crystal is no longer supplied through the tube 650. Furthermore, the tube support tube 710 moves linearly rearwardly and exits from the injection channel H of the cap 540.

The coating head unit 500 is moved to a position where the liquid crystal is dropped.

As a result, if the amount of liquid crystal supplied to the bottle 530 of the coating head unit 500 falls to a predetermined level, the liquid crystal supply device supplies the liquid crystal to the bottle 530.

The liquid crystal injection unit 700 includes a base member 720 coupled to the sidewall of the clean bench B. Actuator 730 is coupled to base member 720. A guide rail (not shown) is coupled to the actuator 730. The slider 740 is slidably coupled to the rail and coupled to the actuator 730. The holder 750 is fixedly coupled to the slider 740. The tube support tube 710 is coupled through the holder 750. The tube support tube 710 has a linear shape.

Upon supply of the liquid crystal to the bottle 530, the actuator 730 moves the slider 740 toward the cap 540 (i.e., moves forward), and the tube support tube 710 is inserted into the injection passage H of the cap 540. If a predetermined amount of liquid crystal is supplied to the bottle 530, the actuator 730 moves the slider 740 rearward, and the tube support tube 710 is withdrawn from the injection path H of the bottle cap 540.

As shown in FIG. 3, in the conventional apparatus for supplying liquid crystal to the bottle, the support tube 710 through which the tube member 650 passes is inserted into the receiving hole h2 of the injection passage H of the cap 540. In this state, when the liquid crystal is injected through the tube 650, since the tube support tube 710 has a linear shape, the liquid crystal is horizontally injected through the tube 650 of the coupling tube support tube 710. Therefore, the liquid crystal and the cap 540 form an inner wall of the common hole h1 of the injection passage H to collide almost vertically. Some of the liquid crystals hit the inner surface of the common hole h1 of the injection passage H and splashed, so that the outer surface of the tube support tube 710 is splashed with liquid crystal. Further, the liquid crystal can pass through the receiving hole of the injection passage H of the bottle cover 540. H2 flows out. The liquid crystal flowing out of the cap 540 through the receiving hole h2 of the injection path H of the cap 540 may fall onto the stage or the substrate. Alternatively, the outer surface of the bottle 530 may have liquid crystal thereon.

Accordingly, the present invention has been made in view of the problems occurring in the prior art, and an object of the present invention is to provide a liquid crystal supply device for a liquid crystal coater in which a tube support tube through which a tube passes is inserted into an injection passage of a cap, and thus is injected through a tube member. When the liquid crystal is injected into the channel, some liquid crystals are prevented from splashing through the injection channel of the cap.

In order to achieve the above object, the present invention provides a liquid crystal supply device for a liquid crystal coater, comprising a bottle device provided on a coating head unit of a liquid crystal coating machine, an inlet of a bottle cap closing bottle, and having an injection passage therein, The tube support tube inserts or exits the injection passage of the cap and the tube by linearly moving the drive unit back and forth, wherein the first end of the tube is connected through the tube support tube and the second end is connected to the liquid crystal tank. One end of the tube support tube is curved.

The curved end of the tube support tube can be facing downward.

The cap allows the cross section of the tube support tube to be inserted into the inlet of the injection channel to have a long hole shape of uniform width and length.

Furthermore, in order to achieve the above object, the present invention provides a liquid crystal supply device for a liquid crystal coater, comprising a bottle holder provided on a coating head unit of a liquid crystal coating machine, and an inlet of a bottle closure bottle holder, and having therein The injection channel and the tube support tube are inserted into or out of the injection passage of the cap by linearly moving the drive unit back and forth, and the tube member, wherein the first end of the tube member is connected through the tube support tube, and the second end is connected to the liquid crystal tank. The injection channel of the cap has an inclined curved surface to allow the liquid crystal to cover the injection channel and flow into the bottle.

The injection passage of the cap may include a common hole and a receiving hole formed perpendicular to the lower surface of the cap, the receiving hole being formed through the side surface of the cap and the inner surface defining the common hole of the cap. A sloped surface can be provided on the lower portion of the inner wall of the cap defining the receiving aperture.

Furthermore, in order to achieve the above object, the present invention provides a liquid crystal supply device for a liquid crystal coater, comprising a bottle holder provided on a coating head unit of a liquid crystal coating machine, and an inlet of a bottle closure bottle holder, and having therein The injection channel and the tube support tube are inserted into or out of the injection passage of the cap by linearly moving the drive unit back and forth, and the tube member, wherein the first end of the tube member is connected through the tube support tube, and the second end is connected to the liquid crystal tank. The injection passage of the cap has a tapered oblique curved surface that allows the liquid crystal to cover the injection passage and flows into the bottle, and one end of the injection passage into which the tube support tube is inserted is curved.

Hereinafter, an embodiment of a liquid crystal supply device of a liquid crystal coater according to the present invention will be explained with reference to the accompanying drawings.

Figure 4 is a side view of a liquid crystal supply device of a liquid crystal coater in accordance with a first embodiment of the present invention.

A liquid crystal supply device of a liquid crystal coater according to a first embodiment of the present invention will be described with reference to FIG.

First, the liquid crystal coater is mounted on the clean bench B. A liquid crystal coater can be installed, and then a clean bench can be installed to position the liquid crystal coater therein. The liquid crystal supply device is mounted outside the clean bench B.

As shown in FIG. 1, the liquid crystal supply device includes a liquid crystal cell 620 mounted on a substrate 610, a pressure supply unit 630 that supplies pressure to the liquid crystal cell 620, a connection pipe 640 that connects the liquid crystal cell 620 and the pressure supply unit 630, and passes through The liquid crystal injection unit 700 coupled to the sidewall of the clean bench B and the tube member 650 connecting the liquid crystal cell 620 and the liquid crystal injection unit 700.

The liquid crystal coater includes a coating head unit.

The coating head unit includes a support assembly 510 that connects the second guiding unit G2 of the liquid crystal coater. The bottle insert member 520 is coupled to the support assembly 510. The bottle 530 is inserted into the bottle insert member 520. A cap 540 is coupled to the mouth of the bottle 530 to close the inlet of the bottle 530. A nozzle unit 550 is provided at a lower portion of the support assembly 510. One end of the nozzle connecting tube 560 is connected to the nozzle unit 550, and the other end is connected through the cap 540. The nozzle unit 550 includes a nozzle 551. The connecting member 570 is coupled to the upper surface of the cap 540 such that a portion of the nozzle connecting tube 560 is coupled through the connecting member 570. Another portion of the nozzle connection tube 560 is positioned in the bottle 530.

The periphery of the bottle mouth of the bottle 530 is formed with a thread.

The cap 540 includes a coupling hole 541 that couples the bottle opening 531 of the bottle 530, and an injection passage H1 that allows liquid crystal to be injected.

The coupling hole 541 of the cap 540 is formed on the lower surface of the cap 540 to have a predetermined depth, and has a thread on the inner surface thereof to engage the thread of the mouth 531 of the bottle 530. The central axis of the coupling hole 541 is perpendicular to the lower surface of the cap 540.

The injection passage H1 of the cap 540 includes a common hole 542 that communicates with the coupling hole 541, and a receiving hole 543 that communicates with the common hole 542. Preferably, the central axis of the common hole 542 is the same as the central axis of the coupling hole 541. The receiving aperture 543 forms an inner surface that defines the common aperture 542 through the outer surface of the cap 540 and the cap 540. Preferably, the central axis of the receiving hole 543 is perpendicular to the central axis of the common hole 542. As shown in Fig. 5, the cross section of the receiving hole 543 preferably has a long hole shape of uniform width and length. The longitudinal direction of the long hole is vertical. The upper and lower portions of the long hole each have a semicircular cross-sectional shape.

Preferably, the inclined curved surface S is provided in the lower portion of the inner wall of the cap 540 defining the receiving hole 543. When the liquid crystal covers the cap 540, the inclined curved surface S formed on the lower portion of the inner wall of the cap 540 defining the receiving hole 543 allows the liquid crystal to flow into the bottle 530. The inclined curved surface S is preferably formed over the entire length of the receiving hole 543. Meanwhile, as shown in FIG. 6, the inclined curved surface S may be formed only along a part of the length of the receiving hole 543. The inclined curved surface S is formed around the common hole 542.

The receiving hole 543 may have a rectangular cross section. When the receiving hole 542 has a rectangular cross section, the bottom of the receiving hole 543 forms an inclined surface. If the liquid crystal drops onto the inclined surface, the liquid crystal flows into the bottle 530 along the inclined surface.

The receiving hole 543 may have a circular cross section.

A screw hole 544 is formed in the upper portion of the cap 540 and communicates with the common hole 542. The central axis of the screw hole 544 is perpendicular to the lower surface of the cap 540.

The connecting member 570 has a threaded body 571 which is threaded at the periphery, and a central portion of the connecting member 570 is formed with a connecting hole 572. The nozzle connecting tube 560 is connected through the connecting hole 572 of the connecting member 570, and the threaded body 571 of the connecting member 570 is fixed to the screw hole 544 of the cap 540.

When the central axis of the connecting hole 572 of the connecting member 570 and the central axis of the receiving hole 543 extend in the linear direction, the central axis of the connecting hole 572 preferably does not intersect the central axis of the receiving hole 543.

The liquid crystal injection unit 700 includes a base member 720 that couples the wall of the clean bench B. The driving unit 730 is coupled to the base member 720. A guide rail (not shown) is coupled to the drive unit 730. The slider 740 is slidably coupled to the rail and coupled to the drive unit 730. The holder 750 is fixedly coupled to the slider 740. The tube support tube 770 is coupled through the holder 750. The tube 650 is coupled to the tube support tube 770 such that one end of the tube 650 passes through the tube support tube 770. The tube 650 is made of an elastic material.

Drive unit 730 is preferably an actuator. The drive unit 730 can include a linear motor. An example in which the drive unit 730 is an actuator will be described below. Actuator 730 linearly moves slider 740. As the slider 740 moves, the tube support tube 770 coupled to the holder 750 also moves with the slider 740.

The perforations are formed in the horizontal direction of the holder 750. The tube support tube 770 is inserted into the perforation of the holder 750.

One end of the tube support tube 770 is curved. The end of the tube support tube 770 is preferably curved downward.

The tube support tube 770 includes a horizontal tube portion 771 and a sloped tube portion 772. The inclined pipe portion 772 preferably has a linear shape. The angle between the horizontal pipe portion 771 and the inclined pipe portion 772 ranges from 90 degrees to 180 degrees. Preferably, the angle between the horizontal pipe portion 771 and the inclined pipe portion 772 ranges from 105 degrees to 165 degrees.

As shown in FIG. 7, another possible shape of the inclined pipe portion 772 is a curved shape.

The horizontal tube portion 771 passes through the perforations of the holder 750. Preferably, one end of the inclined pipe portion 772 faces downward.

Since the tube support tube 770 is curved, the tube 650 coupled to the tube support tube 770 is also curved.

The operation and effect of the liquid crystal supply device according to the present invention will be explained below.

First, the coating head unit 500 is located at the liquid crystal supply position. Whether the tube support tube 770 and the receiving hole 543 of the injection passage H1 of the cap 540 are on the same line are determined by a sensor (not shown) provided on the liquid crystal injection unit 700. If the tube support tube 770 and the receiving hole 543 of the injection channel H1 of the cap 540 are on the same line, when the tube support tube 770 moves linearly forward, the tube support tube 770 is inserted into the receiving hole 543 of the injection channel H1 of the cap 540. .

The actuator 730 moves the slider 740 forward, and the tube support tube 770 is inserted into the injection passage H1 of the cap 540. The slider 740 moves linearly along the rail.

If the actuator 730 is operated for a preset time, the tube support tube 770 is inserted into the injection passage H1 of the cap 540. One end of the inclined pipe portion 772 of the pipe support pipe 770 and one end of the pipe member 650 protruding from one end of the inclined pipe portion 772 are positioned in the common hole 542 of the injection passage H1 of the bottle cap 540. One end of the inclined pipe portion 772 can be positioned in the receiving hole 543 of the injection passage H1 if necessary. The liquid crystal stored in the liquid crystal cell 620 is supplied to the injection path H1 of the cap 540 through the tube 650. Here, since one end of the tube support tube 770 is curved, the liquid crystal ejected from the tube coupling the tube support tube 770 does not vertically hit the inner wall of the common hole 542 of the injection passage H1 of the cap 540, but The inner wall of the common hole 542 is obliquely hit.

Once the liquid crystal supplied through the injection passage H1 of the cap 540 has been supplied to the predetermined extent of the bottle 530, the liquid crystal is no longer supplied through the tube 650.

The actuator 730 moves the slider 740 rearward, and the tube support tube 770 is removed from the injection passage H1 of the cap 540.

According to the present invention, in a state in which the pipe support pipe 770 provided with the pipe member 650 is inserted into the injection passage H1 of the bottle cap 540, the liquid crystal is supplied through the pipe member 650. At this time, since one end of the pipe support pipe 770 is bent downward, as shown in FIG. 8, the liquid crystal discharged through the pipe member 650 does not vertically hit the inner wall of the common hole of the bottle cover 540 defining the injection passage H1, but is inclined obliquely. It hits the lower part of the inner wall, thus minimizing the amount of liquid crystal splash. Therefore, when the tube support tube 770 is inserted into the injection passage H1 of the cap 540 and the liquid crystal is supplied through the tube 650, the liquid crystal leakage flowing through the injection passage H1 of the cap 540 can be prevented.

If the nozzle connecting tube 560 inserted into the connecting hole 572 of the connecting member 570 is curved in the common hole 542 of the injection path H1, when the liquid crystal is ejected through the tube 650 positioned in the receiving hole 543 of the injection path H1, the liquid crystal may touch. To the nozzle connection tube 560. However, since the tube support tube 770 provided with the tube member 650 is curved, the liquid crystal ejected through the tube member 650 obliquely hits the nozzle connection tube 560, thereby minimizing the amount of liquid crystal splash.

According to the present invention, the receiving hole 543 of the injection passage H1 of the cap 540 is formed as an elongated hole, and the tube support tube 770 having the bent end can be smoothly inserted into the receiving hole 543, and further, the cross-sectional area of the receiving hole 543 can be minimized. That is, when the receiving hole 543 of the cap 540 is formed as a circular hole whose diameter is the center line of the long hole, the cross-sectional area of the long hole is smaller than the cross-sectional area of the circular hole. Therefore, when the liquid crystal hits the nozzle connecting tube 560 or the cap 540 defines the inner wall of the common hole 542 of the injection passage H1, the amount of splashed liquid crystal leaking to the outside through the receiving hole 543 can be minimized.

Further, according to the present invention, the inclined curved surface S is formed in the lower portion of the inner wall of the cap 540 defining the receiving hole 543. Therefore, when the liquid crystal hits the nozzle connecting tube 560 or the bottle cap 540 defines the inner wall of the common hole 542 of the injection passage H1 and splashes, the splashed liquid crystal can fall to the inclined curved surface S of the receiving hole 543 of the cap 540. In this case, the liquid crystal flows into the bottle 530 along the inclined curved surface S.

According to the present invention, when the tube support tube 770 has been inserted into the injection passage H1 of the cap 540 of the bottle holder 530, and the tube 650 of the coupling tube support tube 770 supplies the liquid crystal to the bottle 530, the liquid crystal is prevented from passing through the bottle. The injection passage H1 of the cover 540 leaks to the outside. Therefore, when the liquid crystal is supplied to the bottle 530, the liquid crystal does not flow to the outer surface of the bottle 530, or the liquid crystal does not drip onto the stage 200 or the substrate.

As described above, the present invention provides a liquid crystal coating liquid crystal supply device in which a pipe member support pipe is inserted into a bottle mouth of a bottle to close an injection passage of a bottle cap of the bottle inlet, so that liquid crystal is supplied through a pipe member inserted into the pipe support pipe. When the liquid crystal is prevented from leaking through the injection channel of the cap. Such a structure prevents liquid crystal from flowing out of the bottle and prevents the liquid crystal from dripping onto the platform or substrate.

100. . . Main frame

200. . . platform

400. . . Coating head unit support frame

500. . . Coating head unit

510. . . Support assembly

520. . . Bottle inserting member

530. . . Bottle

531. . . Bottle mouth

540. . . Cap

541. . . Coupling hole

542. . . Common hole

543. . . Accepting hole

544. . . Screw hole

550. . . Nozzle unit

551. . . nozzle

560. . . Nozzle connecting tube

570. . . Connecting member

571. . . Thread body

572. . . Connection hole

610. . . Substrate

620. . . LCD channel

630. . . Pressure supply unit

640. . . Connecting pipe

650. . . Pipe fittings

700. . . Liquid crystal injection unit

710. . . Pipe support tube

720. . . Base piece

730. . . Actuator

740. . . Slider

750. . . Supporter

770. . . Pipe support tube

771. . . Horizontal pipe

772. . . Inclined tube

B. . . Clean bench

G1. . . First guiding unit

G2. . . Second guiding unit

H. . . Injection channel

H1. . . Injection channel

H1. . . Common hole

H2. . . Accepting hole

S. . . Oblique surface

The foregoing and other objects, features, and advantages of the present invention will be apparent from

Figure 1 is a side view of a liquid crystal coater and a liquid crystal supply device;

2 is a side view of a coating head unit of a liquid crystal coater and a liquid crystal injection unit;

3 is a cross-sectional view showing a state in which a liquid crystal is injected by inserting a pipe support tube into an injection passage of a cap of a coating head unit;

Figure 4 is a side view of a liquid crystal supply device of a liquid crystal coater according to a first embodiment of the present invention;

Figure 5 is a side view of a cap of a liquid crystal supply device of a liquid crystal coater according to a first embodiment of the present invention;

Figure 6 is a cross-sectional view showing a cap receiving hole of a liquid crystal supply device of a liquid crystal coating machine according to a first embodiment of the present invention;

Figure 7 is a side view of a tube support tube of a liquid crystal supply device of a liquid crystal coater according to a first embodiment of the present invention;

Figure 8 is a cross-sectional view showing the operation of a liquid crystal supply device of a liquid crystal coater in accordance with a first embodiment of the present invention.

510. . . Support assembly

520. . . Bottle inserting member

530. . . Bottle

531. . . Bottle mouth

540. . . Cap

541. . . Coupling hole

542. . . Common hole

543. . . Accepting hole

544. . . Screw hole

550. . . Nozzle unit

551. . . nozzle

560. . . Nozzle connecting tube

570. . . Connecting member

571. . . Thread body

572. . . Connection hole

650. . . Pipe fittings

700. . . Liquid crystal injection unit

720. . . Base piece

730. . . Actuator

740. . . Slider

750. . . Supporter

770. . . Pipe support tube

771. . . Horizontal pipe

772. . . Inclined tube

H1. . . Injection channel

S. . . Oblique surface

Claims (9)

A liquid crystal supply device for a liquid crystal coating machine, comprising: a bottler provided on one coating head unit of the liquid crystal coating machine; a bottle cap closing an inlet of the bottle device and having an injection channel therein a tube support tube for inserting or withdrawing the injection passage of the cap by linearly moving back and forth by a drive unit; and a tube member having a first end connected through the tube support tube and a second end Connecting a liquid crystal cell, wherein the liquid crystal is injected from the outlet of the tube to the injection direction of the injection channel of the bottle cap, and a central axis of the inlet of the bottle is less than 90°; and the injection of the bottle cap The channel has a sloped curved surface that allows liquid crystal to cover the injection channel and flow into the bottle. The liquid crystal supply device of claim 1, wherein one end of the tube support tube is curved and the bent end of the tube support tube is a portion of the injection passage into which the bottle cap is inserted. The liquid crystal supply device of claim 2, wherein the curved end of the tube support tube is downward. The liquid crystal supply device according to claim 1, wherein the cap allows the tube support tube to be inserted into the inlet of the injection passage to have a long hole shape having a uniform width and length. A liquid crystal supply device for a liquid crystal coating machine, comprising: a bottler provided on one coating head unit of the liquid crystal coating machine; a bottle cap closing an inlet of the bottle device and having an injection channel therein ; a tube support tube inserted or withdrawn from the injection passage of the cap by linearly moving back and forth by a drive unit; and a tube member having a first end connected through the tube support tube and a second end connected A liquid crystal cell, wherein the injection channel of the cap has an inclined curved surface, allowing liquid crystal to cover the injection channel and flowing into the bottle. The liquid crystal supply device of claim 5, wherein the injection channel of the cap comprises: a common hole formed perpendicular to a lower surface of the cap; and a receiving hole formed through the cap A side surface and the cap define an inner surface of the common hole, the sloped surface being provided to the lower portion of the inner wall defining one of the receiving holes. A liquid crystal supply device for a liquid crystal coating machine, comprising: a bottler provided on one coating head unit of the liquid crystal coating machine; a bottle cap closing an inlet of the bottle device and having an injection channel therein a tube support tube for inserting or withdrawing the injection passage of the cap by linearly moving back and forth by a drive unit; and a tube member having a first end connected through the tube support tube and a second end Connecting a liquid crystal cell, wherein the injection channel of the cap has a tapered oblique curved surface, allowing liquid crystal to cover the injection channel and flowing into the bottle, and the end of the injection channel into which the tube support tube is inserted is curved of. A liquid crystal supply device for a liquid crystal coating machine, comprising: a bottler, provided on one coating head unit of the liquid crystal coating machine; a cap that closes an inlet of the bottle and has an injection passage therein; a tube support tube that is inserted or withdrawn from the inlet passage of the cap by linearly moving back and forth by a drive unit; and a tube member, a first end of the tube is connected through the tube support tube and a second end is connected to a liquid crystal slot, the first end comprises a horizontal tube portion and an inclined tube portion, and the horizontal tube portion and the inclined tube portion The angle ranges from 105 degrees to 165 degrees, wherein the liquid crystal is injected from the outlet of the tube to the injection direction of the injection channel of the cap, and a central axis of the inlet relative to the bottle is less than 90°. The liquid crystal supply device of claim 8, wherein the inclined pipe portion has a linear shape.