WO2011019186A2 - 초음파를 이용한 액정 적하 장치 - Google Patents
초음파를 이용한 액정 적하 장치 Download PDFInfo
- Publication number
- WO2011019186A2 WO2011019186A2 PCT/KR2010/005234 KR2010005234W WO2011019186A2 WO 2011019186 A2 WO2011019186 A2 WO 2011019186A2 KR 2010005234 W KR2010005234 W KR 2010005234W WO 2011019186 A2 WO2011019186 A2 WO 2011019186A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid crystal
- syringe
- nozzle body
- unit
- substrate
- Prior art date
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 198
- 239000000758 substrate Substances 0.000 claims abstract description 81
- 238000003860 storage Methods 0.000 claims abstract description 37
- 239000006185 dispersion Substances 0.000 claims abstract description 15
- 230000010355 oscillation Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 21
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 9
- 238000000889 atomisation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010924 continuous production Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 210000002858 crystal cell Anatomy 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000010356 wave oscillation Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
- B05B17/063—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn having an internal channel for supplying the liquid or other fluent material
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1341—Filling or closing of cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1341—Filling or closing of cells
- G02F1/13415—Drop filling process
Definitions
- the present invention relates to a liquid crystal dropping device, and more particularly, to a liquid crystal dropping device using ultrasonic waves in which a liquid crystal is atomized to a predetermined size and dropped onto a substrate using ultrasonic waves.
- a flat panel display refers to an image display device that is thinner and lighter than a television or a monitor employing a CRT.
- Such flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), field emission displays (FEDs), organic light emitting diodes (OLEDs), and the like. It is used.
- the liquid crystal display is a display device that can display a desired image by controlling the light transmittance of the liquid crystal cells by separately supplying data signals according to the image information to the liquid crystal cells arranged in a matrix form, which is thin, light and consumes power. It is widely used due to the advantages of low operating voltage.
- adopted for such a liquid crystal display is demonstrated with an example as follows. First, a color filter and a common electrode are patterned on the upper glass substrate, and a thin film transistor (TFT) and a pixel electrode are patterned on the lower glass substrate facing the upper glass substrate. Subsequently, after the alignment films are applied to the substrates, the alignment films are rubbed to provide a pretilt angle and an orientation direction to the liquid crystal molecules of the liquid crystal layer formed therebetween.
- TFT thin film transistor
- a sealant paste is applied in a predetermined pattern by a dispenser to one of the substrates so as to keep the cell gap and to prevent the liquid crystal from leaking out and to seal between the substrates.
- a process of dotting the conductive paste is further performed to connect the common electrode and the pixel electrode respectively formed on the substrates.
- the liquid crystal injection method and the liquid crystal dropping method are used as a method of forming the liquid crystal layer.
- the liquid crystal injection method is a method in which the liquid crystal is injected through the injection holes formed in the substrates between the substrates and the bonded substrates first, and then the injection holes are sealed to form a liquid crystal layer.
- the liquid crystal is dropped using a liquid crystal dropping device in a space defined by the sealant, and then bonded between the substrates, and then the sealant is cured and bonded.
- a liquid crystal display panel As a liquid crystal display panel is enlarged and mass-produced, there is a method of dropping a liquid crystal onto a substrate as a method of filling a liquid crystal.
- the liquid crystal is dropped, and the two substrates are subsequently bonded to each other so that the liquid crystal is present between the two substrates.
- a liquid crystal dropping device is used to drop the liquid crystal.
- the liquid crystal dropping device discharges the liquid crystal onto the substrate while the nozzle supplied with the liquid crystal from the syringe in which the liquid crystal is stored moves relative to the substrate. do.
- the amount of liquid crystal filled in the syringe gradually decreases, and thus the pressure in the syringe changes, thereby preventing the liquid crystal from being discharged in a constant amount through the nozzle. Can be.
- this phenomenon may cause a deterioration of the quality of the liquid crystal panel, there is a need to keep the pressure in the syringe constant while the liquid crystal is discharged through the nozzle.
- this necessity may be more important because the smaller the amount of the liquid crystal to be discharged through the nozzle, the more the phenomenon that the amount of the liquid crystal discharged through the nozzle is not constant even with a slight pressure change in the syringe.
- the liquid crystal is dropped anisotropically one by one.
- the liquid crystal contained in one mass may be unevenly distributed, and as the liquid crystal spreads, the density of the liquid crystal may vary from point to point.
- the liquid crystal accumulation apparatus 10 is provided on the substrate S.
- the liquid crystal L is filled in the liquid crystal dropping device 10 to drop a predetermined amount onto the substrate S.
- the liquid crystal L is dropped on the substrate S in the form of a drop. Since the substrate S is transferred at a speed set in the x and y directions of the rectangular coordinates, and the liquid crystal dropping device 10 discharges the liquid crystal L at a set time interval, the substrate S is dropped on the substrate S.
- the liquid crystals L are arranged at regular intervals in the x and y directions.
- the substrate S may be fixed, and the liquid crystal L may be dropped at regular intervals while the liquid crystal dropping device 10 is transferred in the x and y directions.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a liquid crystal dropping apparatus using ultrasonic waves to compensate for the defect that there is a region where liquid crystal is not distributed in the corner portion of the substrate.
- Another object of the present invention is to provide a liquid crystal dropping apparatus using ultrasonic waves, which allows a continuous process by atomizing particles of a certain size without attaching a portion of the liquid crystal to the nozzle end or agglomerating onto the nozzle surface.
- a syringe having a storage space for storing the liquid crystal, a dropping unit for supplying the liquid crystal stored in the syringe to drop the liquid crystal on the substrate dropping And a gas supply unit applying a pressure to supply the liquid crystal stored in the storage space of the syringe to the atomizing dropping unit.
- the atomizing drop unit is provided with a liquid crystal injection hole communicating with the syringe, coupled to the case inside the case, and penetrating through the discharge port of the end in the vertical direction from the center to communicate with the liquid crystal injection hole of the case and the discharge hole.
- Dispersion blocking portion for forming an air curtain from the discharge port to the substrate in order to prevent compressed air is injected through the space spaced apart and the liquid crystal dropped on the substrate through the discharge port of the nozzle body out of the range of the predetermined range It can be configured to include.
- the gas supply unit is a storage tank for storing the gas supplied to compress the liquid crystal stored in the storage space of the syringe, supplying the gas stored in the storage tank to the storage space of the syringe
- a control valve is provided on the gas supply pipe to adjust the amount of gas stored in the storage tank supplied to the storage space of the syringe.
- the gas supply unit is provided on the gas supply pipe between the control valve and the syringe based on the pressure sensor and the pressure sensor for measuring the pressure of the gas supplied to the syringe through the control valve It may further comprise a positive pressure control unit having a pressure controller for controlling the opening and closing degree of the control valve so that the pressure of the gas supplied to the syringe is kept constant.
- in order to drop the liquid crystal on the entire substrate may be further provided with a transfer unit for transferring the syringe in the horizontal and vertical direction.
- the transfer unit is provided so that the transfer speed is variable to adjust the transfer speed of the syringe.
- the apparatus may further include a drop amount control unit controlling at least one of a feeding speed of the syringe and a supply pressure supplied to the syringe according to the degree of denseness of the liquid crystal dropped on the substrate by the atomizing unit. It can be done by.
- the dispersion blocking unit is provided with a shroud coupled to the nozzle body and the shroud on one side so that the atomizing unit is provided with a space spaced apart from the nozzle body between the nozzle body and the shroud. It may include an air injection unit for injecting compressed air through the space of the space.
- dispersion blocking portion may be formed to be inclined so that the inner diameter of the shroud facing the discharge port toward the lower portion becomes smaller.
- the shroud may be further provided with a height adjusting unit to adjust the height of the end of the shroud with respect to the discharge port.
- the liquid crystal dropping apparatus using ultrasonic waves according to the present invention having the above structure has the following effects.
- the liquid crystal is atomized by particles of a predetermined size by the atomizing drop unit, so that the liquid crystal can be distributed even at the corners of the substrate, so that the liquid crystal is effectively dropped onto the substrate.
- the transfer speed of the syringe and the supply pressure supplied to the syringe depend on overlapping paths of dropping the liquid crystal on the substrate or changing the conveyance speed of the syringe in which the liquid crystal is stored, and the degree of denseness of the liquid crystal dropped on the substrate. By controlling the liquid crystal is dropping constantly on the substrate.
- a dispersion blocking part for forming an air curtain is further provided, thereby improving dropping efficiency.
- FIG. 1 is a state diagram showing that a liquid crystal is dropped onto a substrate by a conventional liquid crystal dropping apparatus
- FIG. 2 is a state diagram showing virtually the pattern of liquid crystal dropped on a substrate by a conventional liquid crystal dropping apparatus
- FIG. 3 is a state diagram showing a pattern of liquid crystal dropped on a substrate by a conventional liquid crystal dropping apparatus
- FIG. 4 is a block diagram of a liquid crystal dropping apparatus using ultrasonic waves according to an embodiment of the present invention.
- FIG. 5 is a detailed view of the atomizing unit of FIG. 4;
- FIG. 6 is a state diagram illustrating an operation principle of a drop amount control unit according to a pattern in which a liquid crystal is dropped on a substrate by a liquid crystal dropping device using ultrasonic waves according to an embodiment of the present disclosure
- FIG. 7 is a state diagram illustrating various forms in which a liquid crystal is dropped onto a substrate by a liquid crystal dropping apparatus using ultrasonic waves according to an embodiment of the present invention.
- liquid crystal dropping device 100 gas supply unit
- control valve 170 constant pressure control unit
- liquid crystal inlet 430 nozzle body
- ultrasonic oscillation unit 452 electrode
- dispersion block 472 air injection portion
- FIGS. 4 and 5 are block diagrams of a liquid crystal dropping apparatus using ultrasonic waves according to an embodiment of the present invention
- Figure 5 is a detailed view of the atomization unit of FIG.
- the liquid crystal dropping apparatus using ultrasonic waves is largely provided with a syringe 200 having a storage space for storing liquid crystals L and a liquid crystal L stored in the syringe 200. Pressure is applied to supply the liquid crystal (L) stored in the storage space of the atomizing dropping unit 400 and the syringe 200 to atomize (L) to drop on the substrate (S) It is configured to include a gas supply unit (100).
- the gas supply unit 100, the storage tank 110, the gas supplied to compress the liquid crystal (L) stored in the storage space of the syringe 200 is stored, the In order to supply the gas stored in the storage tank 110 to the storage space of the syringe 200, the gas supply pipe 130 and the gas supply pipe 130 communicating the storage space of the storage tank 110 and the syringe 200. It is provided on the) is configured to include a control valve 150 for adjusting the supply amount of the gas stored in the storage tank 110 is supplied to the storage space of the syringe 200.
- the gas supply unit 100 is provided on the gas supply pipe 130 between the control valve 150 and the syringe 200 is supplied to the syringe 200 through the control valve 150.
- the opening and closing degree of the control valve 150 to maintain a constant pressure of the gas supplied to the syringe 200 based on the pressure sensor 172 for measuring the pressure of the gas and the pressure measured by the pressure sensor 172 It is further provided with a constant pressure control unit 170 having a pressure controller 174 to control the.
- the syringe 200 is to supply the liquid crystal (L) to the atomizing unit 400 at all times by the constant pressure control unit 170.
- the gas stored in the storage tank 110 passes through the gas supply pipe 130 to compress the liquid crystal L stored in the syringe 200. If so, the liquid crystal (L) is to be discharged to the atomizing unit 400.
- the liquid crystal L is stored in the storage tank 110 by the control valve 150 provided on the gas supply pipe 130 to allow the liquid crystal L to be quantitatively discharged to the atomizing drop unit 400.
- Gas is supplied to the storage space of the syringe 200.
- the pressure controller 174 By controlling the opening and closing degree of the control valve 150 by the pressure of the gas supplied to the storage space of the syringe 200 is always controlled to a constant pressure.
- the syringe 200 is moved horizontally and vertically so that the liquid crystal L is evenly deposited on the substrate S fixed on the flange P.
- FIG. The transfer unit 300 for transferring in the horizontal and vertical direction is further provided.
- liquid crystal L can be dripped on the board
- the transfer unit 300 the syringe 200 can be transported in the x, y-axis direction on the rectangular coordinates, it is formed so that the conveying speed of the syringe 200 is variable.
- the conveying speed of the syringe 200 is variably changed according to the degree of denseness of the liquid crystal dropped on the substrate S by the atomization dropping unit 400. This will be described in more detail later.
- the atomizing unit 400 includes a case 410 having a liquid crystal injection hole 412 communicating with the syringe 200, and a case 410 inside the case 410. And a nozzle body 430 having a liquid crystal flow passage 432 formed therein and penetrating from the center to the discharge hole 434 at the end in the vertical direction to communicate the liquid crystal injection hole 412 of the case 410 with the discharge hole 434. It is provided on the nozzle body 430, and comprises an ultrasonic oscillation unit 450 for vibrating the nozzle body 430 in the vertical direction.
- the case 410 is combined with the nozzle body 430 serves to protect the ultrasonic oscillation unit 450.
- the ultrasonic oscillation unit 450 is connected to the piezoelectric element 454 and the piezoelectric element 454 to supply electrical energy to the piezoelectric element 454 provided on the nozzle body 430. It is configured to include an electrode 452 to be.
- the electrode 452 is connected to the electrode control unit 458 to adjust the electrical energy supplied to the piezoelectric element 454.
- the electrode 452 is to determine the amount of supply of electrical energy from the external power supply through the electrode control unit 458.
- the piezoelectric element 454 receives the electrical energy from the electrode 452 and plays a role of changing the vibration energy to vibrate the nozzle body 430 in the vertical direction.
- the nozzle body 430 is vibrated in the vertical direction by the piezoelectric element 454 of the ultrasonic oscillation unit 450, so that the liquid crystal L supplied from the syringe 200 is the liquid crystal flow path 432.
- the liquid crystal (L) is passed through the (), prevents the liquid crystal (L) is attached to the discharge port 434 or agglomerated on the surface, and serves to make the liquid crystal atomized into particles of a certain size.
- the liquid crystal (L) is provided on the lower portion of the nozzle body 430 of the atomizing drop unit 400, and dropped on the substrate (S) through the discharge port 434 of the nozzle body 430
- a dispersion blocking part 470 is further provided to form an air curtain from the discharge port 434 to the substrate S by compressed air.
- the dispersion blocking unit 470 is provided at one side of the shroud 476 and the shroud 476 coupled to the nozzle body 430 such that a space 474 spaced apart from the nozzle body 430 by a predetermined distance is provided. And an air injection unit 472 for injecting compressed air through the space 474 spaced between the nozzle body 430 and the shroud 476.
- the liquid crystal L in the process of dropping the liquid crystal L on the substrate S while being atomized, the liquid crystal L is a region other than the predetermined region on the substrate S.
- the air curtain is formed by the dispersion blocking portion 470 in the direction in which the liquid crystal L is dropped in order to block the dropping.
- the compressed air flow path 474 is inclined so that an inner diameter thereof becomes smaller toward the lower end of the shroud 476 of the dispersion cutoff portion 470 facing the discharge port 434 of the atomization unloading unit 400. Is formed.
- compressed air passing through the compressed air passage 474 which is a space 474 spaced between the nozzle body 430 and the shroud 476, is discharged from the discharge port 434 of the atomizing unit 400. It is injected toward the liquid crystal (L) direction.
- shroud 476 is further provided with a height adjusting unit 478 so that the height of the end of the shroud 476 can be adjusted with respect to the discharge port 434 of the atomization loading unit 400.
- the compressed air passing through the compressed air flow passage 474 is to determine a region in which the liquid crystal discharged through the discharge port 434 of the atomizing unit 400 is dropped onto the substrate S. .
- FIGS. 6 and 7 are state diagram illustrating an operation principle of a drop amount control unit according to a pattern in which a liquid crystal is dropped onto a substrate by a liquid crystal dropping apparatus using ultrasonic waves according to an embodiment of the present invention
- FIG. It is a state diagram which shows the various forms which a liquid crystal dripping on a board
- the liquid crystal L is atomized by the atomizing drop unit 400 on the substrate S by the transfer part 300 for transferring the syringe 200. It is dropped.
- the liquid crystal L is dropped on the outermost sides a to b of the substrate S, and then the inside of the substrate S is dropped along the zigzag direction.
- an overlapping section e is generated in the middle.
- the loading amount is kept constant, and the loading amount gradually decreases in the section d.
- the dripping amount gradually increases, and then in the g section, the dripping amount is the same as the a, b, and c sections.
- liquid crystals (L) are evenly dropped throughout the substrate (S).
- a dropper for controlling at least one of a feed rate of the syringe 200 by the transfer unit 300 and a supply pressure supplied to the syringe 200 by the gas supply unit 100 is provided.
- the amount control unit is further provided to predict the degree of roughness of the liquid crystal L dropped on the substrate S fixed to the flange P so that the drop amount is adjusted.
- the feed speed of the syringe 200 is increased through the transfer part 300 or the gas supplied to the syringe 200 through the control valve 150 of the gas supply unit 100 is increased.
- the liquid crystal L stored in the syringe 200 reduces the amount supplied to the atomizing drop unit 400.
- the pattern in which the liquid crystal L is dropped onto the substrate S is not limited to one, and may be formed in various forms.
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Engineering & Computer Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Special Spraying Apparatus (AREA)
- Nozzles (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Description
Claims (9)
- 액정이 저장되는 저장공간이 구비된 시린지;상기 시린지에 저장된 액정을 공급받아 상기 액정을 무화시켜 기판상에 적하시키는 무화적하유닛; 및상기 시린지의 저장공간에 저장된 액정을 상기 무화적하유닛에 공급하기 위하여 압력을 가하는 가스공급유닛;을 포함하여 이루어지고,상기 무화적하유닛은,상기 시린지와 연통되는 액정주입구가 구비된 케이스;상기 케이스 내부에서 상기 케이스에 결합되며, 중앙에서 상하 방향으로 끝단의 토출구까지 관통되어 상기 케이스의 액정주입구와 상기 토출구를 연통시키는 액정유로가 형성된 노즐몸체;상기 노즐몸체 상에 구비되어, 상기 노즐몸체를 상하방향으로 진동시키는 초음파 발진유닛; 및상기 노즐몸체와 일정거리 이격된 공간을 가지도록 상기 노즐몸체 하부에 구비되고, 상기 이격된 공간을 통해 압축공기가 분사되어 상기 노즐몸체의 토출구를 통해 상기 기판상에 적하되는 액정이 일정 범위내의 영역 범위를 벗어나는 것을 방지하기 위하여 상기 토출구에서부터 상기 기판까지 에어커튼을 형성시키는 분산차단부;를 포함하여 구성되는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
- 제1항에 있어서,상기 가스공급유닛은,상기 시린지의 저장공간에 저장된 액정을 압착하기 위하여 공급되는 가스가 저장되는 저장탱크;상기 저장탱크에 저장된 가스를 상기 시린지의 저장공간에 공급하기 위하여 상기 저장탱크와 상기 시린지의 저장공간을 연통하는 가스공급관; 및상기 가스공급관 상에 구비되어 상기 시린지의 저장공간에 공급되는 상기 저장탱크에 저장된 가스의 공급량을 조절하는 조절밸브;를 포함하여 이루어지는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
- 제2항에 있어서,상기 가스공급유닛은,상기 조절밸브와 상기 시린지 사이의 상기 가스공급관 상에 구비되어 상기 조절밸브를 지나 상기 시린지에 공급되는 가스의 압력을 측정하는 압력센서; 및상기 압력센서에서 측정된 압력에 기초하여 상기 시린지에 공급되는 가스의 압력이 일정하게 유지되도록 상기 조절밸브의 개폐 정도를 제어하는 압력컨트롤러를 가지는 정압제어부;를 더 포함하여 이루어지는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
- 제1항에 있어서,상기 기판 전체에 상기 액정을 적하하기 위하여 가로 및 세로방향으로 상기 시린지를 이송시키기 위한 이송부가 더 구비되는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
- 제4항에 있어서,상기 이송부는,이송속도가 가변 되는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
- 제1항에 있어서,상기 무화적하유닛에 의하여 상기 기판상에 적하되는 액정의 소밀정도에 따라 상기 시린지의 이송속도 및 상기 시린지에 공급되는 공급압 중 적어도 어느 하나를 제어하는 적하량 제어부를 더 포함하여 이루어지는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
- 제1항에 있어서,상기 분산차단부는,상기 노즐몸체와 일정거리 이격된 공간이 구비되도록 상기 노즐몸체와 결합되는 슈라우드; 및상기 슈라우드 일측에 구비되어 상기 노즐몸체와 슈라우드 사이의 이격된 공간을 통해 압축공기를 주입하는 공기주입부;를 포함하여 이루어지는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
- 제7항에 있어서,상기 분산차단부는,상기 토출구와 대면되는 상기 슈라우드의 끝단이 하부로 갈수록 내경이 작아지도록 경사지게 형성되는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
- 제7항에 있어서,상기 슈라우드는,상기 토출구에 대하여 상기 슈라우드의 끝단의 높이가 조절 가능하도록 높이조절부가 더 구비되는 것을 특징으로 하는 초음파를 이용한 액정 적하 장치.
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JP2012524639A JP5307296B2 (ja) | 2009-08-10 | 2010-08-10 | 超音波を用いた液晶滴下装置 |
US13/389,185 US8888548B2 (en) | 2009-08-10 | 2010-08-10 | Apparatus of dispensing liquid crystal using the ultrasonic wave |
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KR101671173B1 (ko) * | 2009-12-24 | 2016-11-02 | 엘지디스플레이 주식회사 | 액정표시장치용 액정분사장치 및 이를 이용한 액정층 형성방법 |
KR101971140B1 (ko) * | 2012-12-07 | 2019-08-13 | 엘지디스플레이 주식회사 | 액정표시장치용 제조장치 및 이를 이용한 액정표시장치의 제조방법 |
CN103301967B (zh) * | 2013-06-17 | 2015-11-25 | 深圳市华星光电技术有限公司 | 一种配向膜料液喷头 |
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CN107300811B (zh) | 2017-08-11 | 2020-11-20 | 京东方科技集团股份有限公司 | 一种液晶滴嘴及其液晶滴下装置、液晶滴下方法 |
US20210113783A1 (en) | 2019-10-20 | 2021-04-22 | Respira Technologies, Inc. | Electronic devices and liquids for aerosolizing and inhaling therewith |
CN113510055A (zh) * | 2021-09-13 | 2021-10-19 | 常州铭赛机器人科技股份有限公司 | 胶水性能保持装置、注胶机构 |
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JP2013501957A (ja) | 2013-01-17 |
US8888548B2 (en) | 2014-11-18 |
KR100932297B1 (ko) | 2009-12-16 |
JP5307296B2 (ja) | 2013-10-02 |
US20120135663A1 (en) | 2012-05-31 |
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