TWI574742B - Liquid crystal discharge nozzle assembly - Google Patents

Description

Liquid crystal discharge nozzle assembly

The present invention relates to a liquid crystal discharge nozzle element. In particular, the present invention relates to a liquid crystal discharge nozzle element that branches a received liquid crystal into a plurality of portions and discharges it.

The liquid crystal display device generally includes a first substrate provided with a color filter layer, a second substrate on which the driving elements are arranged, a paste (or sealant) pattern for bonding the first substrate and the second substrate, and the above a liquid crystal layer between a substrate and a second substrate.

In order to form a liquid crystal layer between the first substrate and the second substrate, a liquid crystal applicator is used in the liquid crystal display device manufacturing process. The liquid crystal applicator functions to produce a uniform liquid crystal droplet by forming a liquid crystal layer between the first and second substrates of the liquid crystal display device by dropping a predetermined amount of liquid crystal droplets into the glass substrate in a cell process. The liquid crystal layer.

As a conventional method of filling a liquid crystal display device with a liquid crystal, a method of applying a single substrate to a method of dropping a liquid crystal onto an upper portion of a substrate has been mainly used, and a liquid crystal coating method using a dropping method has been mainly used.

1 is a perspective view showing an example of a liquid crystal applicator, and FIG. 2 is a view showing an example of a coating head unit of a liquid crystal applicator.

The liquid crystal applicator 1 includes a frame 3, a platen 5 provided on the upper portion of the frame 3 to mount the substrate S constituting the panel of the liquid crystal display device, a head support table 7 provided on the upper portion of the platen 5, and a head set. The coating head unit 9 of the liquid crystal is dropped by the support table 7. The pallet 5 is driven in the X-axis or Y-axis direction. The head support table 7 is provided to be linearly movable in the Y-axis direction by the drive motor 8 at the upper portion of the frame 3. The coating head unit 9 can adjust the position in the Z-axis direction in order to adjust the relative position with the substrate, and can also be driven in the X-axis or/and Y-axis direction.

The coating head unit 9 includes a liquid crystal bottle 10 that stores liquid crystal dropped to the substrate S, a cylinder element 12 that sucks liquid crystal stored in the liquid crystal bottle 10 and drops to the substrate S, and one end portion is inserted into the liquid crystal bottle 10 and the other is inserted. A tube 14 having an end connected to the cylinder element 12. The liquid crystal stored in the liquid crystal cell 10 is sucked into the cylinder element 12 through the tube 14, and then dropped through the nozzle 16 onto the substrate S placed on the stage 5.

However, the larger the size of the liquid crystal dropped onto the substrate, the liquid crystal cannot be uniformly distributed between the two substrates when the first substrate is bonded to the second substrate, causing a lattice-like unevenness in brightness, that is, unevenness, and the like. bad. Therefore, it is required to reduce the size of the liquid crystal dropped to the substrate.

The present invention has been made to solve the above problems, and an object of the invention is to provide a liquid crystal discharge nozzle element which can be branched by discharging two or more portions of the supplied liquid crystal, and can reduce the size of liquid crystal dropped onto the substrate.

In order to achieve the above object, the present invention provides a liquid crystal discharge nozzle element of a liquid crystal applicator, which divides and discharges the received liquid crystal, and includes: a distribution unit that divides the received liquid crystal into at least two parts for distribution; at least two liquid crystals a transfer tube connected to the distribution unit to receive the divided liquid crystal; a vibration drive unit disposed in each of the liquid crystal transfer tubes to apply vibration to the liquid crystal transfer tube; and a nozzle head disposed at an end of the liquid crystal transfer tube to discharge the liquid crystal .

The liquid crystal discharge nozzle element further includes a casing that forms an outer body, and a cover plate is coupled to one surface of the casing.

As an embodiment, at least one surface of the casing is provided with a heat sink, which can efficiently dissipate heat. Further, the cover plate or the casing is provided with a cooling gas introduction port for introducing a cooling gas for cooling, and a cooling gas outlet for discharging the cooling gas introduced from the cooling gas introduction port. The heat dissipation is promoted by the flow of the cooling gas.

On the other hand, a liquid crystal supply tube insertion recess for inserting a liquid crystal supply tube for transferring liquid crystal supplied from the cylinder element can be formed on the cover plate.

In one embodiment, the distribution unit includes: a liquid crystal introduction tube; a common tube connected to the liquid crystal introduction tube, laterally transmitting liquid crystal introduced through the liquid crystal introduction tube; and at least two branch tubes connected to the common tube, the liquid crystal The transfer tube is combined with the above branch tube.

In addition, as an embodiment, the distribution unit includes: an introduction channel, and the introduction a liquid crystal; a branching channel for distributing liquid crystal to the liquid crystal transfer tube; and a common channel connected to the introduction channel and the branch channel. Further, a liquid crystal transmission tube insertion hole into which the liquid crystal transmission tube is inserted is formed below the branch passage.

A flow block for maintaining the pressure of the liquid crystal in the common passage is inserted into the upper end portion or the inner side of the liquid crystal transmission tube inserted into the liquid crystal transmission tube insertion hole. The flow block is connected by a flow block fixing ring and a flow block connecting rod corresponding to the end of the liquid crystal transfer tube. Further, the flow block is provided in a cylindrical shape having an outer diameter corresponding to the inner diameter of the liquid crystal transmission tube and penetrating through the center, and is fixed to the inner side of the upper portion of the liquid crystal transmission tube.

On the other hand, the shock driving portion includes a support plate and a piezoelectric element attached to one surface of the support plate. Further, the support plate supports the piezoelectric element by applying an elastic force to the piezoelectric element toward the liquid crystal transfer tube. Further, a piezoelectric element protective film is formed in a region of the piezoelectric element that is in contact with the liquid crystal transfer tube.

A pair of the above-described vibration driving portions are respectively provided in accordance with each of the liquid crystal transmission tubes. The shock driving portion is provided on each of the plurality of liquid crystal transfer tubes, and the plurality of shock driving portions are provided in a stacked shape. In one embodiment, the support plate includes a first support plate ear and a second support plate ear on both sides, and the first support plate ear is provided with a first connecting hole, and the second support plate ear is provided with a first Two connecting holes. Further, the method further includes a first fixing rod inserted into the first connecting hole and a second fixing rod inserted into the second connecting hole. Further, a spacer that maintains a space between the shock driving portions is provided on the first fixing bar and the second fixing bar. The spacer is made of a conductive material and can function as one of the electrodes that supply a control signal to the piezoelectric element.

Further, the liquid crystal transmission tube is provided in a state of being combined with the level of the distribution portion and bent in the direction of the nozzle head. In one embodiment, a flat portion is formed in a portion of the liquid crystal transmission tube that is in contact with the piezoelectric element, so that vibration generated in the vibration driving portion can be efficiently transmitted to the liquid crystal transmission tube.

According to the present invention, the supplied liquid crystal is branched into a plurality of portions and discharged, whereby the size of the liquid crystal dropped onto the substrate can be reduced. The liquid crystal applicator using the liquid crystal discharge nozzle element of the present invention can minimize defects such as unevenness of the liquid crystal display.

Further, in the present invention, in the process of branching the liquid crystal, since the fluid flow block is provided at the tip end of each liquid crystal transfer tube, the liquid crystal can be uniformly branched to the respective liquid crystal transfer tubes.

Further, the present invention is provided with a vibration driving portion using a piezoelectric element, thereby making liquid crystal The end of each liquid crystal transfer tube is accurately discharged.

Further, in the invention, the vibration driving unit is formed in a laminated shape, and the liquid crystal transmission tube is located between the vibration driving units, so that the size of the liquid crystal discharge nozzle element can be reduced.

9‧‧‧ Coating head unit

10‧‧‧Liquid crystal bottle

12‧‧‧Cylinder components

14‧‧‧ tube

18‧‧‧Liquid supply tube

20‧‧‧Liquid discharge nozzle assembly

22‧‧‧ housing

24‧‧‧Multiple nozzles

26‧‧‧ Heat sink

28‧‧‧ Cover

30‧‧‧Liquid supply tube is inserted into the notch

32‧‧‧Control section connection hole

34‧‧‧Cooling gas inlet

36‧‧‧Cooling gas discharge

38‧‧‧ mounting bracket

40‧‧‧Distribution Department

42‧‧‧LCD transfer tube

44‧‧‧Nozzle head

46‧‧‧ Lower board

48a‧‧‧First fixed rod

48b‧‧‧Second fixed rod

50‧‧‧Vibration Drive Department

52‧‧‧First gasket

54‧‧‧second gasket

56‧‧‧Importing channel

58‧‧‧Common channel

62‧‧‧ branch channel

64, 70‧‧‧ flow block

66‧‧‧Flow block retaining ring

72‧‧‧Support board

76‧‧‧Piezoelectric components

78‧‧‧ Piezoelectric protective film

82‧‧‧ Flat Department

FIG. 1 is a perspective view showing an example of a liquid crystal applicator.

2 is a view showing an example of a coating head unit of a liquid crystal applicator.

Fig. 3 is a view showing a coating head unit of a liquid crystal applicator including a liquid crystal discharge nozzle assembly according to a preferred embodiment of the present invention.

Fig. 4 is a perspective view of a liquid crystal discharge nozzle assembly according to a preferred embodiment of the present invention.

Fig. 5 is a perspective view showing an internal structure of a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention.

Fig. 6 is a view showing a liquid crystal branching structure of a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention.

Fig. 7a is a view showing an embodiment of a flow block of a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention.

Fig. 7b is a view showing another embodiment of a flow block of the liquid crystal discharge nozzle assembly according to a preferred embodiment of the present invention.

Fig. 8 is a plan view showing a vibration driving unit of a liquid crystal discharge nozzle unit according to a preferred embodiment of the present invention.

Fig. 9 is a cross-sectional view showing a vibration driving portion of a liquid crystal discharge nozzle unit according to a preferred embodiment of the present invention.

FIG. 10 is a view for explaining liquid crystal suction by driving of a vibration driving unit of a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention.

Fig. 11 is a view showing another mode of a liquid crystal transmission tube of a liquid crystal discharge nozzle unit according to a preferred embodiment of the present invention.

FIG. 12 and FIG. 13 are views showing a liquid crystal discharge state in which the liquid crystal discharge nozzle element according to the preferred embodiment of the present invention is used.

Figure 14 is a view showing a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention. A diagram of another embodiment of a liquid crystal branching structure.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, the components of the respective drawings are denoted by the reference numerals, and the same components are denoted by the same reference numerals when they are shown in different drawings. Further, in the description of the present invention, the detailed description of the known structures or functions will be omitted when the gist of the present invention is unclear. In addition, the preferred embodiments of the present invention are described below, but the technical idea of the present invention is not limited thereto, and the present invention can be implemented in various ways by those skilled in the art.

Fig. 3 is a view showing a coating head unit of a liquid crystal applicator including a liquid crystal discharge nozzle assembly according to a preferred embodiment of the present invention.

The coating head unit 9 includes a liquid crystal bottle 10 that stores liquid crystal dropped to the substrate, a cylinder member 12 that sucks liquid crystal stored in the liquid crystal bottle 10 and drops to the substrate, and one end portion is inserted into the liquid crystal bottle 10 at the other end portion. The tube 14 connected to the cylinder member 12 further includes a liquid crystal discharge nozzle assembly 20 according to a preferred embodiment of the present invention. Preferably, the cylinder assembly 12 transfers the liquid crystal transferred from the liquid crystal bottle 10 to the liquid crystal discharge nozzle assembly 20 by a certain amount. To this end, the cylinder element 12 can include a metering pump. The liquid crystal sucked from the cylinder element 12 is transferred to the liquid crystal discharge nozzle element 20 through the liquid crystal supply tube 18. The liquid crystal discharge nozzle assembly 20 includes a housing 22 and a multi-nozzle 24 composed of a plurality of nozzles. The liquid crystal discharge nozzle element 20 divides the liquid crystal supplied through the liquid crystal supply tube 18 into a plurality of portions, and discharges the divided liquid crystal from the multi-nozzle 24.

4 is a perspective view of a liquid crystal discharge nozzle assembly according to a preferred embodiment of the present invention, and FIG. 5 is a perspective view showing an internal structure of a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention, and FIG. 6 is a view showing a preferred embodiment of the present invention. A diagram of a liquid crystal branching structure of a liquid crystal discharge nozzle element according to an embodiment.

Referring to Fig. 4, the liquid crystal discharge nozzle unit 20 includes a casing 22 having built-in components for branching the liquid crystal and sucking the branched liquid crystal, and a cover plate 28 covering one surface of the casing 22. The cover plate 28 can be attached or detached to the above-described housing 22. A heat sink 26 for discharging heat inside the casing 22 to the outside may be provided on at least one face of the casing 22.

The liquid crystal supply tube insertion recess 30 into which the liquid crystal supply tube 18 is inserted is provided in the cover plate 28. Further, a control portion connecting hole 32 into which an electric wire (not shown) is inserted may be provided on the cover plate 28, The above electric wire is used to transmit a control signal to the shock driving unit 50 described later. On the other hand, the cover plate 28 may be provided with a cooling gas introduction port 34 into which the cooling gas for cooling the inside of the casing 22 is introduced, and a cooling gas discharge port 36 through which the introduced cooling gas is discharged. As the cooling gas, air, an inert gas such as nitrogen, helium or argon may be used. In the case where air is used as the cooling gas, clean dry air (CDA: Clean Dryer Air) from which impurities and moisture are removed can be used. As described above, the liquid crystal supply tube insertion recess 30, the control unit connection hole 32, the cooling gas introduction port 34, and the cooling gas discharge port 36 are provided in the cover plate 28. However, the above-described constituent elements may of course be provided in addition to the cover plate 28. On the outer casing 22.

The liquid crystal discharge nozzle element 20 may include a mounting bracket 38. The mounting bracket 38 can be secured to the cover 28 or housing 22. As an embodiment, the mounting bracket 38 is fixed to the coating head unit 9, and the liquid crystal discharge nozzle assembly 20 can be attached to the coating head unit 9.

Referring to Fig. 5, the liquid crystal discharge nozzle unit 20 includes a liquid distribution unit 40 that divides and distributes the liquid crystal supplied to the inside of the casing 22, a plurality of liquid crystal transfer tubes 42 that transmit the liquid crystal distributed through the distribution unit 40, and a plurality of liquid crystal transfer tubes. A vibration driving unit 50 that applies vibrations, and a nozzle tip 44 that is provided on the plurality of liquid crystal transmission tubes 42 to protrude the divided liquid crystals, respectively.

The distribution unit 40 performs a function of dividing the liquid crystal supplied from the liquid crystal supply tube 18 inserted into the liquid crystal supply tube insertion recess 30 and distributing it to the liquid crystal transfer tube 42. As an example of the above-described distribution unit 40, FIG. 5 and FIG. 6 exemplify a block-shaped distribution unit 40.

The liquid crystal transfer tube 42 performs a function of transferring the dispensed liquid crystal to the nozzle head 44. As an embodiment, the liquid crystal transfer tube 42 is fixed to the lower plate 46 opposite to the above-described cover plate 28. Further, the liquid crystal transmission tube 42 may be bent at a substantially right angle from the lower plate 46 so that a part thereof is located in the lower plate 46. A nozzle head 44 is provided at the end of each liquid crystal transfer tube 42. The nozzle head 44 may be formed integrally with the liquid crystal transmission tube 42, or may be provided separately from the liquid crystal transmission tube 42 and connected to the liquid crystal transmission tube 42. The plurality of nozzle heads 44 constitute a multi-nozzle 24. The liquid crystal transmission tube 42 is preferably made of a material capable of efficiently transmitting the vibration of the vibration driving unit 50. As a material of the liquid crystal transmission tube 42, a polymer material such as polyetheretherketone (PEEK), a glass material, a zirconia material, or the like can be used.

The vibration driving unit 50 applies vibration to the liquid crystal transmission tube 42. The vibration driving portion 50 may be formed in a plate shape. As an embodiment, the vibration driving portion 50 may be formed in a diamond shape as a whole. In the earthquake The first connecting hole 51a and the second connecting hole 51b are provided on both sides of the movable driving unit 50.

On the other hand, a first fixing bar 48a and a second fixing bar 48b are provided on the casing 22. As an embodiment, the plurality of liquid crystal transfer tubes 42 are arranged in a row, and the first fixing bars 48a and the second fixing bars 48b are located on both sides of the plurality of liquid crystal transfer tubes 42 arranged in a line. A vibration driving portion 50 can be disposed on one of the liquid crystal transfer tubes 42. Further, in order to enhance the vibration effect transmitted to the liquid crystal transmission tube 42, the vibration driving portion 50 may be provided on both sides of one liquid crystal transmission tube 42. At this time, one liquid crystal transfer tube 42 is located between the pair of shock driving portions 50.

Referring to Fig. 5, a plurality of shock driving portions 50 are coupled to first fixing bar 48a and second fixing bar 48b to have a stack shape. The first fixing rod 48a is inserted into the first coupling hole 51a of the vibration driving portion 50, and the second fixing rod 48b is inserted into the second coupling hole 51b. A second spacer 54 is disposed between the pair of shock driving portions 50 on both sides of one liquid crystal transmission tube 42, and a first spacer is disposed between the pair of shock driving portions 50 and the other pair of shock driving portions 50. 52. As an embodiment, the second spacer 54 and the first spacer 52 may be metal washers. Further, the above metal may have electrical conductivity. When a piezoelectric element to be described later is provided on the vibration driving unit 50, a control signal is input to the piezoelectric element, and the first spacer 52 and the second spacer 54 made of the metal material can serve two electrodes for transmitting a control signal. The role of one of the electrodes.

A configuration in which the distribution unit 40 distributes liquid crystal to the plurality of liquid crystal transfer tubes 42 will be described with reference to Fig. 6 . A liquid crystal supply tube insertion recess 30 is provided in the cover plate 28, and the liquid crystal supply tube 18 is inserted into the liquid crystal supply tube insertion recess 30. The distribution portion 40 is provided with an introduction passage 56 for introducing the liquid crystal supplied from the liquid crystal supply tube 18, a common passage 58 for laterally transmitting the liquid crystal supplied through the introduction passage 56, and a common passage 58 and a plurality of liquid crystal transfer tubes 42. Branch channels 62 that are respectively connected. The liquid crystal supplied from the liquid crystal supply tube 18 is introduced into the introduction passage 56 and is divided and distributed to the respective branch passages 62 through the common passage 58. A liquid crystal transfer tube insertion hole 64 is provided below the branch passage 62. The liquid crystal transfer tube 42 is inserted into the liquid crystal transfer tube insertion hole 64. The liquid crystals distributed to the branch channels 62 are transferred to the respective liquid crystal transfer tubes 42.

The common passage 58 of the distribution portion 40 can be formed by laterally penetrating the distribution portion 40, and is formed by blocking the both sides of the hole with the first common passage plug 60a and the second common passage plug 60b.

On the other hand, the introduction passage 56 is connected to the substantially central portion of the common passage 58, and the plurality of branch passages 62 are connected to the common passage 58 in such a manner as to be developed along the common passage 58, so that the farther the branch passage 62 is from the introduction passage 56, the distribution is made. The smaller the amount of liquid crystal. In order to solve this problem, you can A flow block 64 is provided in the liquid crystal transfer tube 64. The flow block 64 is configured to reduce the internal cross-sectional area of the liquid crystal transfer tube 64.

Figure 7a is a view showing an embodiment of a flow block of a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention, and Figure 7b is a flow block showing a liquid crystal discharge nozzle assembly according to a preferred embodiment of the present invention. A diagram of an embodiment.

Referring to FIG. 7a, a flow block 64 according to an embodiment can be disposed in the liquid crystal transfer tube 42 in a state of being connected by a flow block fixing ring 66 and a flow block connecting rod 68 corresponding to an end portion of the liquid crystal transfer tube 42. . Referring to Fig. 7b, the flow block 70 according to another embodiment is a hollow cylinder in which the outer diameter substantially coincides with the inner diameter of the liquid crystal transmission tube 42 and the center penetrates. At this time, the flow block 70 may be bonded to the liquid crystal transfer tube 42 by a close insertion method or using an adhesive.

8 is a plan view of a vibration driving unit of a liquid crystal discharge nozzle unit according to a preferred embodiment of the present invention, and FIG. 9 is a cross-sectional view showing a vibration driving unit of the liquid crystal discharge nozzle unit according to a preferred embodiment of the present invention.

As one embodiment, the shock driving portion 50 includes a plate-shaped support plate 72 and a piezoelectric element 76 attached to the above-described support plate 72. The piezoelectric element 76 is configured to be in contact with the liquid crystal transfer tube 42. The support plate 72 may be constituted by a leaf spring that urges the piezoelectric element 76 in the direction of the liquid crystal transmission tube 42 so that the piezoelectric element 76 is in close contact with the outer wall of the liquid crystal transmission tube 42. Referring to FIG. 9, the support plate 72 includes a first support plate ear 74a and a second support plate ear 74b having a predetermined angle in the opposite direction to the face to which the piezoelectric element 76 is attached. A first coupling hole 51a is provided in the first support plate lug 74a, and a second coupling hole 51b is provided in the second support plate lug 74b. When the first fixing rod 48a and the second fixing rod 48b are inserted into the first connecting hole 51a and the second connecting hole 51b, respectively, and the vibration driving unit 50 is coupled, the piezoelectric element 76 is pressed in the direction of the liquid crystal transmission tube 42 and is in close contact with each other. . As an embodiment, in order to efficiently transmit the vibration based on the piezoelectric element 76 to the liquid crystal transfer tube 42, the support plate 72 has a substantially rhombic shape.

On the other hand, the electrode connecting portion 80 is connected to the piezoelectric element 76. One of the electrodes for driving the piezoelectric element 76 is constituted by the above-described electrode connection portion 80, and the other electrode may be constituted by the first spacer 52 and the second spacer 54 having conductivity as described above.

A protective film 78 for protecting the piezoelectric element 76 may be disposed at an upper portion of the piezoelectric element 76. The protective film 78 may be provided along a surface of the piezoelectric element 76 that is in contact with the liquid crystal transfer tube 42. protection The film 78 minimizes damage and excessive heat generation of the piezoelectric element 76 due to friction. The protective film 78 is preferably made of a material having good heat resistance and wear resistance. As an example thereof, a polypimide tape of a polyimide material can be used as a protective film.

FIG. 10 is a view for explaining liquid crystal suction by driving of a vibration driving unit of a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention.

The vibration driving portion 50 is provided in a state of being in contact with the outer peripheral surface of the liquid crystal transmission tube 42. The vibration driving unit 50 may be used as described above, or the pair of vibration driving units 50 may be provided on the outer circumferential surface of the liquid crystal transmission tube 42 as shown in FIG. 10 . As an embodiment, the support plate 72 of the shock driving portion 50 supports the piezoelectric element 76 in contact with the outer peripheral surface of the liquid crystal transmission tube 42 in a state of being elastic. A piezoelectric element protective film 78 is provided at a portion where the piezoelectric element 76 is in contact with the liquid crystal transfer tube 42. Referring to Fig. 10 (b) and Fig. 10 (c), as a control signal is input to the piezoelectric element 76, the piezoelectric element 76 contracts and expands, thereby generating vibration. The generated vibration is transmitted to the liquid crystal transfer tube 42. The upstream of the liquid crystal transmission tube 42 is supplied from the cylinder element 12 through the liquid crystal supply tube 18. Due to the vibration generated in the vibration driving portion 50, the liquid crystal supplied to the inside of the liquid crystal transmission tube 42 is sucked toward the downstream side of the liquid crystal transmission tube 42.

Fig. 11 is a view showing another mode of a liquid crystal transmission tube of a liquid crystal discharge nozzle unit according to a preferred embodiment of the present invention.

The liquid crystal transfer tube 42 shown in FIG. 11 is characterized by including a flat portion 82. The flat portion 82 is provided on at least one side surface of the liquid crystal transmission tube 42. When a pair of vibration driving portions 50 are provided, the flat portion 82 is provided on both side surfaces of the liquid crystal transmission tube 42. As an embodiment, the flat portion 82 may be formed by plastically deforming by pressing both sides of the liquid crystal transfer tube 42. As the present invention, the face of the flat portion 82 does not have to be formed into a flat surface. When the cross section of the liquid crystal transmission tube 42 in the longitudinal direction is elliptical at the position of the flat portion 82, the flat portion 82 can also function. This is because, in the case where the flat portion 82 is provided, the contact area between the piezoelectric element 76 and the liquid crystal transmission tube 42 can be increased as compared with the case where the flat portion 82 is not provided.

FIG. 12 and FIG. 13 are views showing a liquid crystal discharge state in which the liquid crystal discharge nozzle element according to the preferred embodiment of the present invention is used.

FIG. 12 is a cross-sectional view showing the liquid crystal discharge nozzle unit 20 cut along the longitudinal direction of the liquid crystal transmission tube 42, and FIG. 13 is a view of the liquid crystal discharge nozzle element 20 as viewed from the left side with reference to FIG. through The liquid crystal supplied through the liquid crystal supply tube 18 is distributed in the distribution unit 40 as the number of the liquid crystal transfer tubes 42. The liquid crystals distributed to the respective liquid crystal transfer tubes 42 are discharged from the respective nozzle heads 44 constituting the multi-nozzles 24 and dripped onto the substrates.

Referring to Fig. 12, in the liquid crystal discharge nozzle unit 20, the liquid crystal transfer tube 42 is horizontally connected from the distribution portion 40, and is bent in a vertical direction at a predetermined position (near or in the lower plate 46 in Fig. 12). Thereby, the nozzle head 44 faces the substrate S. In other words, the liquid crystal transmission tube 42 is provided in a state of being bent into a U shape, and the nozzle head is provided on one side of the liquid crystal transmission tube, and the other side of the liquid crystal transmission tube is coupled to the distribution portion. On the other hand, as an embodiment of the present invention, the liquid crystal transmission tube 42 may be disposed in the vertical direction. However, as shown in FIG. 12, in the case where the liquid crystal transfer tube 42 is horizontally disposed from the distribution portion 40, there is a case where the liquid crystal to be dispensed is sucked toward the nozzle head 44 by the driving of the shock driving portion 50 not by its own weight. advantage. Further, by the configuration in which the liquid crystal transmission tube 42 is bent from the horizontal direction toward the vertical direction, it is possible to prevent or minimize the occurrence of air bubbles in the inside of the liquid crystal transmission tube 42.

Fig. 14 is a view showing another embodiment of a liquid crystal branching structure of a liquid crystal discharge nozzle element according to a preferred embodiment of the present invention.

In the description with reference to Fig. 6, the distribution unit 40 is exemplified as an introduction passage 56 into which the liquid crystal supplied from the liquid crystal supply tube 18 is introduced, a common passage 58 that laterally transmits the liquid crystal supplied through the introduction passage 56, and a connection to the common passage 58. And a block shape of the branch passage 62 connected to each of the plurality of liquid crystal transfer tubes 42.

Referring to Fig. 14, the distribution unit 100 according to another embodiment includes a liquid crystal introduction tube 102 connected to the liquid crystal supply tube insertion recess 30 of the cover plate 28, connected to the liquid crystal introduction tube 102, and laterally transmitted through the liquid crystal introduction tube. A common-flow tube 104 for introducing the liquid crystal 102 and a branch pipe 106 connected to the common-purpose pipe 104. A liquid crystal introduction tube insertion recess 108 that communicates with the liquid crystal supply tube insertion recess 30 is provided on the lower side of the cover plate 28, and the liquid crystal introduction tube 102 is inserted into the liquid crystal introduction tube insertion recess 108.

The liquid crystal transfer tube 42 is coupled to the above-described branch pipe 106. As an embodiment, the liquid crystal transfer tube 42 is bonded to the outside of the branch pipe 106 as shown in FIG. Of course, the liquid crystal transfer tube 42 may be coupled to the inner side of the branch pipe 106 as the case may be. Here, the liquid crystal introduction tube 102, the common tube 104, and the branch tube 106 may be made of a material having a certain degree of rigidity, and examples of the material thereof include glass, metal, or plastic resin.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes and substitutions may be made without departing from the spirit and scope of the invention. Therefore, the embodiments and the drawings disclosed in the present invention are not limited to the technical idea of the present invention, but are intended to be illustrative, and the scope of the technical idea of the present invention is not limited to the above embodiments and the accompanying drawings. The scope of the present invention should be construed as the scope of the invention, and all technical ideas within the scope of the invention should be construed as falling within the scope of the invention.

9‧‧‧ Coating head unit

10‧‧‧Liquid crystal bottle

12‧‧‧Cylinder components

14‧‧‧ tube

18‧‧‧Liquid supply tube

20‧‧‧Liquid discharge nozzle assembly

22‧‧‧ housing

24‧‧‧Multiple nozzles

Claims (20)

A liquid crystal discharge nozzle element of a liquid crystal applicator that divides and discharges a received liquid crystal, comprising: a distribution unit that divides the received liquid crystal into at least two parts for distribution; at least two liquid crystal transfer tubes, and The distribution unit is connected to receive the divided liquid crystal; the vibration driving unit is disposed in each of the liquid crystal transmission tubes, and applies vibration to the liquid crystal transmission tube, and the vibration driving unit includes a support plate and a pressure attached to one surface of the support plate. The electrical component; and the nozzle head are disposed at an end of the liquid crystal transmission tube to discharge the liquid crystal. The liquid crystal discharge nozzle element according to claim 1, further comprising a casing that forms an outer body, and a cover plate is coupled to one surface of the casing. The liquid crystal discharge nozzle element according to claim 2, wherein a heat sink is provided on at least one surface of the casing. The liquid crystal discharge nozzle element according to claim 2, wherein the cover plate or the casing is provided with a cooling gas introduction port for introducing a cooling gas for cooling, and a cooling gas outlet for discharging The cooling gas introduced from the cooling gas introduction port. The liquid crystal discharge nozzle element according to the first aspect of the invention, wherein the distribution unit includes: a liquid crystal introduction tube; a common tube connected to the liquid crystal introduction tube; and laterally transmitting liquid crystal introduced through the liquid crystal introduction tube; and at least two The branch pipes are connected to the common pipe, and the liquid crystal transfer pipe is coupled to the branch pipe. The liquid crystal discharge nozzle element according to claim 1, wherein the distribution portion includes: an introduction passage into which the liquid crystal is introduced; a branch passage that distributes liquid crystal to the liquid crystal transmission tube; and a common passage, the introduction passage, and the Branch channel connection. The liquid crystal discharge nozzle element according to claim 6, wherein a liquid crystal transmission tube insertion hole into which the liquid crystal transmission tube is inserted is formed below the branch passage. The liquid crystal discharge nozzle element according to claim 7, wherein an inner cross-sectional area of the liquid crystal transmission tube is inserted into an upper end portion or an inner side of the liquid crystal transmission tube inserted into the liquid crystal transmission tube insertion hole. Part of the flow block. The liquid crystal discharge nozzle element according to claim 8, wherein the flow block is connected by a flow block fixing ring and a flow block connecting rod corresponding to an end portion of the liquid crystal transfer tube. The liquid crystal discharge nozzle element according to claim 8, wherein the flow block is provided in a cylindrical shape having an outer diameter corresponding to an inner diameter of the liquid crystal transmission tube and penetrating through the center, and is fixed to the liquid crystal transfer tube. Upper inside. The liquid crystal discharge nozzle element according to the first aspect of the invention, wherein the support plate supports the piezoelectric element such that an elastic force is applied to the piezoelectric element toward the liquid crystal transmission tube. The liquid crystal discharge nozzle element according to the first aspect of the invention, characterized in that a piezoelectric element protective film is formed in a region of the piezoelectric element that is in contact with the liquid crystal transmission tube. The liquid crystal discharge nozzle element according to the first aspect of the invention, characterized in that each of the liquid crystal transmission tubes is provided with a pair of the vibration driving portions. The liquid crystal discharge nozzle element according to claim 13, wherein the vibration drive unit is provided in each liquid crystal transmission tube, and the plurality of vibration drive units are provided in a laminated shape. The liquid crystal discharge nozzle element according to claim 14, wherein the support plate includes a first support plate ear and a second support plate ear on both sides, and the first support plate ear is provided with a first connection hole A second connecting hole is disposed on the second support plate ear. The liquid crystal discharge nozzle element according to claim 15, further comprising a first fixing rod inserted into the first coupling hole and a second fixing rod inserted into the second coupling hole. The liquid crystal discharge nozzle element according to claim 16, wherein the first fixed rod and the second fixed rod are provided with a spacer that maintains a gap between the shock driving portions. The liquid crystal discharge nozzle element according to claim 17, wherein the spacer is made of a conductive material. The liquid crystal discharge nozzle element according to any one of claims 1 to 10, wherein the liquid crystal transmission tube is provided in a state of being bent into a U shape, and is disposed on one side of the liquid crystal transmission tube. The nozzle head is provided, and the other side of the liquid crystal transmission tube is coupled to the distribution portion. The liquid crystal discharge nozzle element according to claim 1, wherein a flat portion is formed in a portion of the liquid crystal transmission tube that is in contact with the piezoelectric element.