WO2013170502A1 - 液晶吸取装置和液晶涂布设备 - Google Patents

液晶吸取装置和液晶涂布设备 Download PDF

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Publication number
WO2013170502A1
WO2013170502A1 PCT/CN2012/076313 CN2012076313W WO2013170502A1 WO 2013170502 A1 WO2013170502 A1 WO 2013170502A1 CN 2012076313 W CN2012076313 W CN 2012076313W WO 2013170502 A1 WO2013170502 A1 WO 2013170502A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
container
straw
flexible straw
generating unit
Prior art date
Application number
PCT/CN2012/076313
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English (en)
French (fr)
Inventor
蔡文卿
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深圳市华星光电技术有限公司
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Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US13/519,314 priority Critical patent/US20130305986A1/en
Publication of WO2013170502A1 publication Critical patent/WO2013170502A1/zh

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    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
    • B29D11/00788—Producing optical films
    • 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 the field of liquid crystal technology, and in particular to a liquid crystal suction device and a liquid crystal coating device.
  • a liquid crystal display device includes a thin film transistor (TFT) array substrate, a color filter array substrate, and a liquid crystal layer sandwiched therebetween.
  • TFT thin film transistor
  • a liquid crystal display device (LCD) generates an image by controlling a voltage applied to a liquid crystal layer in each pixel and thereby allowing light to pass through with a varying amount of light.
  • the formation of the liquid crystal layer is mostly achieved by means of liquid crystal coating.
  • the liquid crystal coating applies a certain amount of liquid crystal to each of the panel regions defined on the (TFT) array substrate or the color filter array substrate in the form of a plurality of liquid crystal droplets corresponding to the reference liquid crystal amount.
  • a liquid crystal dripper is usually used to drop liquid crystals in a corresponding area. The weight and position of each drop of liquid crystal to be dripped must be precisely controlled.
  • the liquid crystal drip machine includes a line 2 and a pump 3.
  • the line 2 is connected to the pump 3 at one end and the suction end 21 at the other end, and is placed in the liquid crystal container 1. Wherein the line 2 is a flexible pipe.
  • the liquid crystal used in the liquid crystal dripping machine is taken out from the purchased liquid crystal container 1, and a fixed volume (weight-converted) liquid crystal liquid droplet is pressed out by the pump 3.
  • the liquid volume of each liquid crystal needs to be strictly controlled, because the gas is also a compressible fluid. If bubbles appear in the liquid crystal before the pump 3 is pressed out, there will be an abnormality in the discharge of the liquid crystal droplets, and even the liquid crystal may not be pressed out, which may cause potential quality risks of the product or the product may be directly scrapped.
  • the technical problem to be solved by the present invention is to provide a liquid crystal suction device and a liquid crystal coating device, which can keep the suction end of the liquid crystal tube at the bottom of the liquid crystal liquid at any time, and prevent the suction end of the liquid crystal tube from sucking air bubbles.
  • a technical solution adopted by the present invention is to provide a liquid crystal suction device, the device comprising: a first vacuum generating unit, a flexible straw, a load body, and an air filtering unit; wherein the load body is disposed At one end of the flexible straw, the other end of the flexible straw is connected to the first vacuum generating unit; the air filtering unit is disposed in the pipeline of the flexible straw, and includes a container for holding the liquid crystal, a second vacuum generating unit, and a liquid level detecting unit.
  • a portion of the flexible straw is placed into the container from the container opening, and the flexible straw portion placed in the container is partially broken, so that the flexible straw is divided into a first straw portion of the first vacuum generating unit and a second straw that receives the weight.
  • the second vacuum generating unit is disposed in the second straw portion, and the disconnected portion of the flexible straw is immersed in the liquid crystal of the container, and the liquid level detecting unit detects that the liquid level of the liquid crystal in the container is lower than the first height threshold.
  • the second vacuum generating unit causing the second vacuum generating unit to extract the liquid crystal into the container, and detecting that the liquid level of the liquid crystal in the container is higher than the second highest
  • the second vacuum generating unit stops the extraction of the liquid crystal
  • the height of the second height greater than the first threshold value is a threshold value
  • the load body is a glass or stainless steel surface of the object.
  • the load body comprises two surfaces intersecting, an opening of one end of the flexible straw is disposed on one surface of the load body, and a surface of the load body is provided with a slot, one end of the slot and one end of the flexible straw The openings are open, and the other end of the slot leads to the other surface of the load.
  • the load body has a shape of a sphere, a cone or a cylinder.
  • a liquid crystal suction device comprising: a first vacuum generating unit, a flexible straw, and a load; wherein the load is disposed on the flexible straw At one end, the flexible straw is terminated at the other end to the first vacuum generating unit.
  • the load body is an object whose surface is glass or stainless steel.
  • the load body comprises two surfaces intersecting, an opening of one end of the flexible straw is disposed on one surface of the load body, and a surface of the load body is provided with a slot, one end of the slot and one end of the flexible straw The openings are open, and the other end of the slot leads to the other surface of the load.
  • the load body has a shape of a sphere, a cone or a cylinder.
  • the device comprises an air filter unit
  • the air filter unit is disposed in a pipeline of the flexible straw, and comprises a container for holding the liquid crystal, a second vacuum generating unit and a liquid level detecting unit, wherein a part of the flexible straw is from the container
  • the opening is placed in the container, and the flexible straw portion placed in the container is partially broken, so that the flexible straw is divided into a first straw portion of the first vacuum generating unit and a second straw portion of the weight bearing body, and the second vacuum is generated.
  • the unit is disposed in the second straw portion, and the disconnected portion of the flexible straw is immersed in the liquid crystal of the container.
  • the second vacuum generating unit When the liquid level detecting unit detects that the liquid level of the liquid crystal in the container is lower than the first height threshold, the second vacuum generating unit is extracted.
  • the liquid crystal enters the container, and when detecting that the liquid level of the liquid crystal in the container is higher than the second height threshold, the second vacuum generating unit stops extracting the liquid crystal, and the second height threshold is greater than the first height threshold.
  • a liquid crystal coating apparatus comprising: a coating head and a liquid crystal suction device;
  • the liquid crystal suction device includes: a first vacuum generating unit, The flexible straw and the load body; wherein the load body is disposed at one end of the flexible straw, and the other end of the flexible straw is connected to the first vacuum generating unit, and the coating head is connected to the first vacuum generating unit.
  • the load body is an object whose surface is glass or stainless steel.
  • the load body comprises two surfaces intersecting, an opening of one end of the flexible straw is disposed on one surface of the load body, and a surface of the load body is provided with a slot, one end of the slot and one end of the flexible straw The openings are open, and the other end of the slot leads to the other surface of the load.
  • the load body has a shape of a sphere, a cone or a cylinder.
  • the liquid crystal suction device comprises an air filter unit
  • the air filter unit is disposed in a pipeline of the flexible straw, and comprises a container for holding the liquid crystal, a second vacuum generating unit and a liquid level detecting unit, part of the flexible straw Inserted into the container from the container opening, and the flexible straw portion placed in the container is partially broken, so that the flexible straw is divided into a first straw portion of the first vacuum generating unit and a second straw portion of the weight bearing body, the second The vacuum generating unit is disposed in the second straw portion, and the disconnected portion of the flexible straw is immersed in the liquid crystal of the container, and the liquid level detecting unit detects that the liquid level of the liquid crystal in the container is lower than the first height threshold, so that the second vacuum is generated
  • the unit extracts the liquid crystal into the container, and when detecting that the liquid level of the liquid crystal in the container is higher than the second height threshold, causes the second vacuum generating unit to stop extracting the liquid crystal, and the second height threshold is greater than the first height threshold.
  • the device of the present invention comprises a first vacuum generating unit, a flexible straw and a load; the load is disposed at one end of the flexible straw, and can maintain one end of the flexible straw In this way, at the position below the liquid crystal level, it is possible to prevent the suction of the liquid crystal tube from sucking the air bubbles, thereby keeping the weight of each liquid crystal uniform.
  • FIG. 1 is a schematic view showing the structure of an excessively long pipeline in a liquid crystal dripping machine of the prior art
  • FIG. 2 is a schematic structural view of a pipeline bending in a prior art liquid crystal dripping machine
  • FIG. 3 is a schematic structural view of a first embodiment of a liquid crystal suction device of the present invention.
  • FIG. 4 is an enlarged schematic view showing a tapered load body in the first embodiment of the liquid crystal suction device of the present invention
  • Figure 5 is a perspective view of the load body of Figure 4 after being reversed;
  • FIG. 6 is an enlarged schematic view showing another reverse tapered load body in the embodiment of the liquid crystal suction device of the present invention.
  • Figure 7 is a perspective view of the load body of Figure 6 after being reversed;
  • FIG. 8 is an enlarged schematic view showing a spherical load body in an embodiment of the liquid crystal suction device of the present invention.
  • Figure 9 is a perspective view of the load body of Figure 8 after being reversed
  • Figure 10 is an enlarged schematic view showing a cylindrical load body in the embodiment of the liquid crystal suction device of the present invention.
  • Figure 11 is a perspective view of the load body of Figure 10 after being reversed;
  • Figure 12 is a schematic view showing the structure of a second embodiment of the liquid crystal suction device of the present invention.
  • Figure 13 is a schematic structural view of a first embodiment of a liquid crystal coating apparatus of the present invention.
  • Figure 14 is a schematic view showing the structure of a second embodiment of the liquid crystal coating apparatus of the present invention.
  • FIG. 3 is a schematic structural view of a first embodiment of a liquid crystal suction device according to the present invention.
  • the liquid crystal suction device of the present embodiment includes a first vacuum generating unit 31, a flexible straw 32, and a load body 33.
  • the load body 33 is disposed at one end of the flexible straw 32, and the other end of the flexible straw 32 is connected to the first vacuum generating unit 31.
  • FIG. 4 is an enlarged schematic view of the load body 33 in the first embodiment of the liquid crystal suction device of the present invention
  • FIG. 5 is a perspective view of the load body of FIG.
  • the load body 33 has a tapered, frustum or similar configuration including two intersecting surfaces 331 and 332, respectively a tapered or frustum-shaped mid-side and a larger bottom surface.
  • An opening 321 at one end of the flexible straw 32 is disposed on one surface 332 of the load body 33, and a surface 332 of the load body 33 is provided with a slit 333.
  • slot 333 communicates with the opening 321 at one end of the flexible straw 32, and the other end of the slot 333 leads to the other surface 331 of the load body 33.
  • the slot 333 can be set to two or more, which is not limited herein.
  • the opening 321 of one end of the flexible straw 32 is disposed on the surface 332 of the load body 33 corresponding to the bottom surface of the tapered or frustum shape, so that the opening 321 at one end of the flexible straw 32 can be always located at the lowermost end of the flexible straw 32, and the stability is high;
  • the slot 333 formed in the surface 332 is ensured to communicate with the opening 321 at one end of the flexible straw 32 and the surface 331 corresponding to the tapered or frustum-shaped middle surface, thereby ensuring that the opening 321 at one end of the flexible straw 32 is in contact with the liquid crystal 11 At the bottom of the container 22, the liquid crystal can always be sucked in without being sealed by the surface 332 of the load carrying body 33 and the bottom of the container 22 containing the liquid crystal.
  • FIG. 6 is an enlarged schematic view of another inverted cone load body in the embodiment of the liquid crystal suction device of the present invention
  • FIG. 7 is a perspective view of the load body of FIG. 6 after being reversed.
  • the load body 44 of Figures 6 and 7 is similar to the load body 33 of Figures 4 and 5 described above, except that the load body 44 of Figures 6 and 7 is constructed as an inverted cone, a frustum or the like. shape.
  • the opening 321 at one end of the flexible straw 32 is disposed on the surface 442 of the load body 44 corresponding to the top surface of the tapered or frustum shape.
  • the inverted cone, frustum shape or the like ensures that the opening 321 at one end of the flexible straw 32 can enter a narrower space at the bottom of the container containing the liquid crystal, and the liquid crystal is as much as possible.
  • FIG. 8 is an enlarged schematic view of a spherical load body in the embodiment of the liquid crystal suction device of the present invention
  • FIG. 9 is a perspective view of the load body of FIG. 8 after being reversed.
  • the load body 55 of Figures 8 and 9 is similar to the load body 33 of Figures 4 and 5 described above, except that the load body 55 of Figures 8 and 9 is of a spherical or similar shape.
  • the opening 321 at one end of the flexible straw 32 is disposed on the surface 552 of the load body 55.
  • the spherical load body 55 can be easily rolled at the bottom of the container containing the liquid crystal, and can automatically enter the lowest position of the container under the action of gravity, and the liquid crystal can be sucked as much as possible.
  • FIG. 10 is an enlarged schematic view of a cylindrical load body in the embodiment of the liquid crystal suction device of the present invention
  • FIG. 11 is a perspective view of the load body of FIG. 10 after being reversed.
  • the load cells 66 of Figures 10 and 11 are similar to the load bodies 33 of Figures 4 and 5 described above, except that the load cells 66 of Figures 10 and 11 are cylindrical or similar in shape.
  • the opening 321 at one end of the flexible straw 32 is disposed on the surface 662 of the load body 66.
  • the cylindrical or similar shape ensures that the opening 321 at one end of the flexible straw 32 can enter a narrower space at the bottom of the container containing the liquid crystal, and the liquid crystal is as much as possible.
  • the shape of the load body can be made according to actual needs, and is not limited herein.
  • the load body is an object whose surface is glass or stainless steel, that is, the surface material of the load body is glass or stainless steel, or the entire load body is glass or stainless steel. In practical applications, the load body is provided with any material that does not pollute the liquid crystal at least on its surface, and is not limited herein.
  • the flexible straw 32 can maintain the position below the liquid crystal level under the gravity of the load body, preventing the air from being attracted due to the position of the flexible straw 32 exposed above the liquid crystal level, so that the flexible straw 32 can be Draw the liquid crystal to the bottom.
  • FIG. 12 is a schematic structural view of a second embodiment of the liquid crystal suction device of the present invention.
  • the device includes a first vacuum generating unit 31, a flexible straw 32, a load body 33, and an air filtering unit 34.
  • the load body 33 is disposed at one end of the flexible straw 32, and the other end of the flexible straw 32 is connected to the first vacuum generating unit 31.
  • the air filter unit 34 is disposed in the conduit of the flexible straw 32, and includes a container 341 containing a liquid crystal, a second vacuum generating unit 342, and a liquid level detecting unit 343.
  • a portion of the flexible straw 32 is inserted into the container 341 from the opening of the container 341, and the flexible straw 32 placed in the container 341 is partially broken, so that the flexible straw 32 is divided into the first straw portion 323 of the first vacuum generating unit 31 and connected.
  • the second straw portion 324 of the load body 33 and the second vacuum generating unit 342 are disposed in the second straw portion 324.
  • the broken portion 322 of the flexible straw 32 is immersed in the liquid crystal 11 of the container 341.
  • the second vacuum generating unit 342 extracts the liquid crystal into the container 341. If the liquid crystal entering the container 341 contains air bubbles, the air bubbles rise and enter the liquid surface without entering the first straw portion 323. Further, when the liquid level detecting unit 343 detects that the liquid level of the liquid crystal 11 in the container 341 is higher than the second height threshold, the second vacuum generating unit 342 stops the liquid crystal extraction.
  • the second height threshold is greater than the first height threshold.
  • the amount of liquid crystal contained in the air filter unit 34 is small, and the height of the liquid crystal liquid level is controlled by the liquid level detecting unit 343 so that the liquid surface is immersed in the disconnected portion 322 of the flexible straw, and the specific amount is determined according to the actual application, so as not to waste should. Further, in order to prevent the air bubbles from accidentally entering the first straw portion 323, the first straw portion 323 entering the liquid crystal in the container 341 can be moved as far as possible from the second straw portion 324.
  • the load body 33 is any of the load cells of the first embodiment of the above apparatus.
  • the air filter unit 34 can more effectively prevent the flexible straw of the load end body from inhaling air due to the small amount of liquid crystal when sucking the last few liquid crystals, and can completely absorb the liquid crystal, especially in mass production. At the time, the last wasted liquid crystal was only the liquid crystal contained in the air filter unit.
  • the present invention also provides a liquid crystal coating apparatus.
  • the apparatus includes a coating head 20 and a liquid crystal suction device 30.
  • the liquid crystal suction device 30 includes a first vacuum generating unit 31, a flexible straw 32, and a load body 33.
  • the load body 33 is disposed at one end of the flexible straw 32, the other end of the flexible straw 32 is connected to the first vacuum generating unit 31, and the coating head 20 is connected to the first vacuum generating unit 31.
  • the load body 33 includes two surfaces 331 and 332 intersecting, an opening 321 at one end of the flexible straw 32 is disposed on one surface 332 of the load body 33, and a surface 332 of the load body 33 is provided with a slot 333.
  • One end of the slot 333 communicates with the opening of one end of the flexible straw 32, and the other end of the slot 333 leads to the other surface 331 of the load body 33.
  • the slot 333 can be set to two or more, which is not limited herein.
  • the shape of the load body is spherical, conical or cylindrical, as shown in FIGS. 4 to 11 or other shapes which are made according to actual needs, and are not limited herein.
  • the load body is an object whose surface is glass or stainless steel, that is, the surface material of the load body is glass or stainless steel, or the entire load body is glass or stainless steel. In practical applications, the load body is provided with any material that does not pollute the liquid crystal at least on its surface, and is not limited herein.
  • FIG. 14 is a second embodiment of the liquid crystal coating apparatus of the present invention.
  • the load body 73 is disposed at one end of the flexible straw 72, and the other end of the flexible straw 72 is connected to the first vacuum generating unit 71.
  • the air filter unit 74 is disposed in the conduit of the flexible straw 72, and includes a container 741 containing a liquid crystal, a second vacuum generating unit 742, and a liquid level detecting unit 743.
  • a portion of the flexible straw 72 is inserted into the container 741 from the opening of the container 741, and the flexible straw 72 placed in the container 741 is partially broken, so that the flexible straw 72 is divided into the first straw portion of the first vacuum generating unit 71 and the load.
  • the second straw portion of the body 73, the second vacuum generating unit 742 is disposed at the second straw portion.
  • the broken portion 722 of the flexible straw 72 is immersed in the liquid crystal of the container.
  • the second vacuum generating unit 742 extracts the liquid crystal into the container, and detects that the liquid crystal level in the container is high.
  • the second vacuum generating unit 742 stops the liquid extraction, wherein the second height threshold is greater than the first height threshold.
  • the amount of liquid crystal contained in the air filter unit 74 is small, and the height of the liquid crystal liquid level is controlled by the liquid level detecting unit 743, so that the liquid surface is immersed in the disconnected portion of the flexible straw, and the specific amount is determined according to the actual application, so that it is not wasteful. .
  • the load body 73 may be any one of the above-described liquid crystal suction devices in the first embodiment.
  • the air filter unit 74 in this embodiment can more effectively prevent the flexible suction pipe 72 at the end of the load-bearing body 73 from inhaling air due to the small amount of liquid crystal when sucking the last few liquid crystals.
  • the suction is clean, especially in mass production, and the last wasted liquid crystal is only the liquid crystal contained in the air filter unit 74.
  • the load body of the embodiment of the present invention may also be connected in series with the flexible straw 72, and the thickness is made uniform with the tube thickness of the flexible straw 72, so as to maintain the appearance consistent with the flexible straw 72.
  • the density is now greater than the flexible straw 72.
  • the load body is designed at the suction end of the flexible straw, so that one end of the flexible straw is maintained at a position below the liquid crystal level.
  • the suction end of the liquid crystal pipeline can be prevented from sucking air bubbles, thereby making each drop
  • the weight of the liquid crystal remains the same.

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Abstract

一种液晶吸取装置和液晶涂布装置，所述液晶吸取装置包括第一真空产生单元（31）、柔性吸管（32）、荷重体（33）和空气过滤单元（34）。空气过滤单元（34）设置于柔性细管（32）的管路中，并且包括盛装液晶的容器（341）、第二真空产生单元（342）以及液位检测单元（343）。柔性吸管（32）置入容器（341）内的部分断开并浸入容器（341）内的液晶，使得柔性吸管（32）分为接入第一真空产生单元（31）的第一吸管部分（323）和接荷重体（33）的第二吸管部分（324），第二真空产生单元（342）设置于第二吸管部分（324）。

Description

液晶吸取装置和液晶涂布设备
【技术领域】
本发明涉及液晶技术领域，特别是涉及一种液晶吸取装置和液晶涂布设备。
【背景技术】
液晶显示装置（LCD）包括薄膜晶体管（TFT）阵列基板、彩色滤光片阵列基板以及夹在两者之间的液晶层。液晶显示装置（LCD）通过控制施加在各像素内液晶层上的电压并由此容许光以变化的光量透过而产生图像。
液晶层的形成多采用液晶涂布的方式来实现。液晶涂布是以多个对应于基准液晶量的液晶液滴的形式将一定量的液晶涂布到限定在（TFT）阵列基板或彩色滤光片阵列基板上的各个面板区。通常采用液晶滴下机在相对应面积内滴入液晶。滴下的每滴液晶的重量、位置都需精密控制。参见图1和图2，该液晶滴下机包括管路2以及泵3。管路2一头接泵3，另一头为吸入端21，置入液晶容器1。其中管路2为柔性管道。
液晶滴下机所采用的液晶是由购入的液晶容器1中抽取，并由泵3压出固定容积（重量换算）的液晶液滴，每滴液晶需严格控制容积，因为气体也是可压缩流体，如果在泵3压出前液晶中出现了气泡，会出现液晶液滴挤压出容积异常、甚至会出现液晶无法压出的情况，这些均会造成产品潜在质量风险或是产品直接报废。
为避免此问题，目前一般在液晶使用前都需经过低压脱泡，待液晶中小气泡抽出后才可使用。但现行使用的液晶管路于液晶容器内还是会抽到空气。还参见图1和图2，当液晶容器1内储存的液晶4残量过低时，管路2过长（如图1所示）或者管路2弯曲（如图2所示），管路2的吸入端21在液晶液面5以上时，都会导致管路2抽到空气的情况。
【发明内容】
本发明主要解决的技术问题是提供一种液晶吸取装置和液晶涂布设备，能够使液晶管路吸入端随时保持在液晶液面底下，防止液晶管路的吸入端吸入气泡。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种液晶吸取装置，所述装置包括：第一真空产生单元、柔性吸管、荷重体以及空气过滤单元；其中，所述荷重体设置于柔性吸管一端，所述柔性吸管另一端接第一真空产生单元；所述空气过滤单元设置于柔性吸管的管路中，并且包括盛装液晶的容器、第二真空产生单元以及液位检测单元，所述柔性吸管的一部分从容器开口置入容器内，并且置入容器内的柔性吸管部分断开，使柔性吸管分为接第一真空产生单元的第一吸管部分和接荷重体的第二吸管部分，所述第二真空产生单元设置于第二吸管部分，柔性吸管的断开部分均浸入容器的液晶中，所述液位检测单元检测到容器中液晶的液位低于第一高度阈值时，使第二真空产生单元抽取液晶进入容器内，并在检测到容器中液晶的液位高于第二高度阈值时，使第二真空产生单元停止抽取液晶，所述第二高度阈值大于第一高度阈值；所述荷重体为表面为玻璃或不锈钢的物体。
其中，所述荷重体包括相交的两个表面，所述柔性吸管一端的开口设置于荷重体的其中一表面，并且所述荷重体的表面设置有开槽，所述开槽一端与柔性吸管一端的开口相通，所述开槽另一端通往荷重体的另一表面。
其中，所述荷重体的形状为球形、锥形或圆柱形。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶吸取装置，所述装置包括：第一真空产生单元、柔性吸管以及荷重体；其中，所述荷重体设置于柔性吸管一端，所述柔性吸管另一端接第一真空产生单元。
其中，所述荷重体为表面为玻璃或不锈钢的物体。
其中，所述荷重体包括相交的两个表面，所述柔性吸管一端的开口设置于荷重体的其中一表面，并且所述荷重体的表面设置有开槽，所述开槽一端与柔性吸管一端的开口相通，所述开槽另一端通往荷重体的另一表面。
其中，所述荷重体的形状为球形、锥形或圆柱形。
其中，所述装置包括空气过滤单元，所述空气过滤单元设置于柔性吸管的管路中，并且包括盛装液晶的容器、第二真空产生单元以及液位检测单元，所述柔性吸管的一部分从容器开口置入容器内，并且置入容器内的柔性吸管部分断开，使柔性吸管分为接第一真空产生单元的第一吸管部分和接荷重体的第二吸管部分，所述第二真空产生单元设置于第二吸管部分，柔性吸管的断开部分均浸入容器的液晶中，所述液位检测单元检测到容器中液晶的液位低于第一高度阈值时，使第二真空产生单元抽取液晶进入容器内，并在检测到容器中液晶的液位高于第二高度阈值时，使第二真空产生单元停止抽取液晶，所述第二高度阈值大于第一高度阈值。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种液晶涂布设备，所述设备包括：涂布头和液晶吸取装置；所述液晶吸取装置包括：第一真空产生单元、柔性吸管以及荷重体；其中，所述荷重体设置于柔性吸管一端，所述柔性吸管另一端接第一真空产生单元，所述涂布头连接第一真空产生单元。
其中，所述荷重体为表面为玻璃或不锈钢的物体。
其中，所述荷重体包括相交的两个表面，所述柔性吸管一端的开口设置于荷重体的其中一表面，并且所述荷重体的表面设置有开槽，所述开槽一端与柔性吸管一端的开口相通，所述开槽另一端通往荷重体的另一表面。
其中，所述荷重体的形状为球形、锥形或圆柱形。
其中，所述液晶吸取装置包括空气过滤单元，所述空气过滤单元设置于柔性吸管的管路中，并且包括盛装液晶的容器、第二真空产生单元以及液位检测单元，所述柔性吸管的一部分从容器开口置入容器内，并且置入容器内的柔性吸管部分断开，使柔性吸管分为接第一真空产生单元的第一吸管部分和接荷重体的第二吸管部分，所述第二真空产生单元设置于第二吸管部分，柔性吸管的断开部分均浸入容器的液晶中，所述液位检测单元检测到容器中液晶的液位低于第一高度阈值时，使第二真空产生单元抽取液晶进入容器内，并在检测到容器中液晶的液位高于第二高度阈值时，使第二真空产生单元停止抽取液晶，所述第二高度阈值大于第一高度阈值。
本发明的有益效果是：区别于现有技术的情况，本发明装置包括第一真空产生单元、柔性吸管以及荷重体；所述荷重体设置于柔性吸管一端，能够使所述柔性吸管的一端保持在液晶液面以下的位置，通过这种方式，能够防止液晶管路的吸入端吸入气泡，因而使每滴液晶的重量保持一致。
【附图说明】
图1是现有技术液晶滴下机中管路过长的结构示意图；
图2是现有技术液晶滴下机中管路弯曲的结构示意图；
图3是本发明液晶吸取装置第一实施例的结构示意图；
图4是本发明液晶吸取装置第一实施例中一种锥形荷重体的放大示意图；
图5是图4中的荷重体颠倒后的立体示意图；
图6是本发明液晶吸取装置实施例中另一种倒锥形荷重体的放大示意图；
图7是图6中的荷重体颠倒后的立体示意图；
图8是本发明液晶吸取装置实施例中一种球形荷重体的放大示意图；
图9是图8中的荷重体颠倒后的立体示意图；
图10是本发明液晶吸取装置实施例中一种圆柱形荷重体的放大示意图；
图11是是图10中的荷重体颠倒后的立体示意图；
图12是本发明液晶吸取装置第二实施例的结构示意图；
图13是本发明液晶涂布设备第一实施例的结构示意图；
图14是本发明液晶涂布设备第二实施例的结构示意图。
【具体实施方式】
下面结合附图和实施例对本发明进行详细说明。
参阅图3，图3是本发明液晶吸取装置第一实施例的结构示意图，本实施例的液晶吸取装置包括：第一真空产生单元31、柔性吸管32以及荷重体33。其中，荷重体33设置于柔性吸管32一端，柔性吸管32另一端接第一真空产生单元31。
参阅图4和图5，图4是本发明液晶吸取装置第一实施例中荷重体33的放大示意图，图5是图4中的荷重体颠倒后的立体示意图。如图所示，荷重体33的结构为锥形、锥台形或类似的形状，包括相交的两个表面331和332，分别为锥形或锥台形中侧面和较大的底面。柔性吸管32一端的开口321设置于荷重体33的其中一表面332，并且荷重体33的表面332设置有开槽333。开槽333一端与柔性吸管32一端的开口321相通，开槽333另一端通往荷重体33的另一表面331。实际应用时，开槽333可以设置两个或以上，在此不作限制。
柔性吸管32一端的开口321设置于荷重体33的对应于锥形或锥台形中底面的表面332上，可以使柔性吸管32一端的开口321始终位于柔性吸管32最下端，且稳定性较高；而该表面332上开设的开槽333，由于分别与柔性吸管32一端的开口321和对应于锥形或锥台形中侧面的表面331相通，则确保柔性吸管32一端的开口321在接触盛装液晶11的容器22底部时，始终能吸入液晶，而不会被荷重体33的表面332和盛装液晶的容器22底部接触而密封。
参阅图6和图7，图6是本发明液晶吸取装置实施例中另一种倒锥形荷重体的放大示意图，图7是图6中的荷重体颠倒后的立体示意图。图6和图7中的荷重体44与前述图4和图5中的荷重体33类似，不同之处是图6和图7中的荷重体44其结构为倒置的锥形、锥台形或类似的形状。此时柔性吸管32一端的开口321设置于荷重体44的对应于锥形或锥台形中顶面的表面442上。
倒置的锥形、锥台形或类似的形状，能确保柔性吸管32一端的开口321能进入盛装液晶的容器底部较窄的空间，尽可能将液晶吸取完。
参见图8和图9，图8是本发明液晶吸取装置实施例中一种球形荷重体的放大示意图，图9是图8中的荷重体颠倒后的立体示意图。图8和图9中的荷重体55与前述图4和图5中的荷重体33类似，不同之处是图8和图9中的荷重体55其结构为球形或类似的形状。此时柔性吸管32一端的开口321设置于荷重体55的表面552上。
球形的荷重体55可以较为容易地在盛装液晶的容器底部滚动，在重力作用下可以自动进入容器最低的位置，尽可能将液晶吸取完。
参见图10和图11，图10是本发明液晶吸取装置实施例中一种圆柱形荷重体的放大示意图，图11是图10中的荷重体颠倒后的立体示意图。图10和图11中的荷重体66与前述图4和图5中的荷重体33类似，不同之处是图10和图11中的荷重体66其结构为圆柱形或类似的形状。此时柔性吸管32一端的开口321设置于荷重体66的表面662上。
圆柱形或类似的形状，能确保柔性吸管32一端的开口321能进入盛装液晶的容器底部较窄的空间，尽可能将液晶吸取完。
当然，荷重体的形状可依实际需求进行制作，在此不作限制。
荷重体为表面为玻璃或不锈钢的物体，即荷重体的表面材料为玻璃或不锈钢，或者整个荷重体都是玻璃或不锈钢。在实际应用中，荷重体至少在其表面设置不污染液晶的任何材质，在此不作限制。
可以了解，柔性吸管32在荷重体的重力下，可以保持在液晶液面以下的位置，防止因柔性吸管32暴露在液晶液面以上的位置而吸到空气的情况发生，从而使得柔性吸管32可以吸取到最底部的液晶。
参阅图12，图12是本发明液晶吸取装置第二实施例的结构示意图，在本实施例中，该装置包括：第一真空产生单元31、柔性吸管32、荷重体33以及空气过滤单元34。
其中，荷重体33设置于柔性吸管32一端，柔性吸管32另一端接第一真空产生单元31。空气过滤单元34设置于柔性吸管32的管路中，并且包括盛装液晶的容器341、第二真空产生单元342以及液位检测单元343。
柔性吸管32的一部分从容器341开口置入容器341内，并且置入容器341内的柔性吸管32部分断开，使柔性吸管32分为接第一真空产生单元31的第一吸管部分323和接荷重体33的第二吸管部分324，第二真空产生单元342设置于第二吸管部分324。柔性吸管32的断开部分322均浸入容器341的液晶11中。
在工作过程中，液位检测单元343检测到容器341中液晶11的液位低于第一高度阈值时，使第二真空产生单元342抽取液晶进入容器341内。若进入容器341内的液晶中含有气泡，则这些气泡会上升并进入液面之上，而不会进入第一吸管部分323。此外，液位检测单元343在检测到容器341中液晶11的液位高于第二高度阈值时，使第二真空产生单元342停止抽取液晶。其中，第二高度阈值大于第一高度阈值。
空气过滤单元34中盛装液晶的量很少，液晶液面的高度通过液位检测单元343进行控制，使得液面浸没柔性吸管的断开部分322，具体的量根据实际应用确定，以不浪费为宜。此外，为避免气泡意外进入第一吸管部分323，可以让进入容器341内液晶中的第一吸管部分323尽量远离第二吸管部分324。
荷重体33为上述装置第一实施例中的任一荷重体。
需要说明的是，空气过滤单元34可以更加有效的防止荷重体端的柔性吸管在吸取最后几滴液晶时由于液晶量少而吸入空气的情况发生，可以将液晶全部吸取干净，特别是在大批量生产的时候，最后浪费的液晶仅仅是空气过滤单元中盛装的液晶。
本发明还提供一种液晶涂布设备，参阅图13，该设备包括：涂布头20和液晶吸取装置30；液晶吸取装置30包括：第一真空产生单元31、柔性吸管32以及荷重体33。其中，荷重体33设置于柔性吸管32一端，柔性吸管32另一端接第一真空产生单元31，涂布头20连接第一真空产生单元31。
见图4和图5，荷重体33包括相交的两个表面331和332，柔性吸管32一端的开口321设置于荷重体33的其中一表面332，并且荷重体33的表面332设置有开槽333，开槽333一端与柔性吸管32一端的开口相通，开槽333另一端通往荷重体33的另一表面331。实际应用时，开槽333可以设置两个或以上，在此不作限制。
荷重体的形状为球形、锥形或圆柱形，见图4至图11，或者其它根据实际需要制作的形状，在此不作限制。
荷重体为表面为玻璃或不锈钢的物体，即荷重体的表面材料为玻璃或不锈钢，或者整个荷重体都是玻璃或不锈钢。在实际应用中，荷重体至少在其表面设置不污染液晶的任何材质，在此不作限制。
参见图14，图14是本发明液晶涂布设备第二实施例，荷重体73设置于柔性吸管72一端，柔性吸管72另一端接第一真空产生单元71。空气过滤单元74设置于柔性吸管72的管路中，并且包括盛装液晶的容器741、第二真空产生单元742以及液位检测单元743。
柔性吸管72的一部分从容器741开口置入容器741内，并且置入容器741内的柔性吸管72部分断开，使柔性吸管72分为接第一真空产生单元71的第一吸管部分和接荷重体73的第二吸管部分，第二真空产生单元742设置于第二吸管部分。柔性吸管72的断开部分722均浸入容器的液晶中。
在工作过程中，液位检测单元743检测到容器中液晶的液位低于第一高度阈值时，使第二真空产生单元742抽取液晶进入容器内，并在检测到容器中液晶的液位高于第二高度阈值时，使第二真空产生单元742停止抽取液晶，其中，第二高度阈值大于第一高度阈值。
空气过滤单元74中盛装液晶的量很少，液晶液面的高度通过液位检测单元743进行控制，使得液面浸没柔性吸管的断开部分，具体的量根据实际应用确定，以不浪费为宜。
荷重体73可以为上述液晶吸取装置第一实施例中的任一种荷重体。
需要说明的是，本实施例中的空气过滤单元74可以更加有效地防止荷重体73端的柔性吸管72在吸取最后几滴液晶时由于液晶量少而吸入空气的情况发生，可以尽可能将液晶全部吸取干净，特别是在大批量生产的时候，最后浪费的液晶仅仅是空气过滤单元74中盛装的液晶。
还需要说明的是，本发明实施例的荷重体也可以与柔性吸管72串接，厚度做成与柔性吸管72的管厚一致，从而在外观上保持与柔性吸管72一致。此时密度则比柔性吸管72大。
总之，本发明实施例在柔性吸管的吸入端设计荷重体，使柔性吸管的一端保持在液晶液面以下的位置，通过这种方式，能够防止液晶管路的吸入端吸入气泡，因而使每滴液晶的重量保持一致。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (13)

  1. 一种液晶吸取装置，其中，所述装置包括：
    第一真空产生单元、柔性吸管、荷重体以及空气过滤单元；
    其中，所述荷重体设置于柔性吸管一端，所述柔性吸管另一端接第一真空产生单元；所述空气过滤单元设置于柔性吸管的管路中，并且包括盛装液晶的容器、第二真空产生单元以及液位检测单元，所述柔性吸管的一部分从容器开口置入容器内，并且置入容器内的柔性吸管部分断开，使柔性吸管分为接第一真空产生单元的第一吸管部分和接荷重体的第二吸管部分，所述第二真空产生单元设置于第二吸管部分，柔性吸管的断开部分均浸入容器的液晶中，所述液位检测单元检测到容器中液晶的液位低于第一高度阈值时，使第二真空产生单元抽取液晶进入容器内，并在检测到容器中液晶的液位高于第二高度阈值时，使第二真空产生单元停止抽取液晶，所述第二高度阈值大于第一高度阈值；
    所述荷重体为表面为玻璃或不锈钢的物体。
  2. 根据权利要求1所述的装置，其特征在于，所述荷重体包括相交的两个表面，所述柔性吸管一端的开口设置于荷重体的其中一表面，并且所述荷重体的表面设置有开槽，所述开槽一端与柔性吸管一端的开口相通，所述开槽另一端通往荷重体的另一表面。
  3. 根据权利要求2所述的装置，其特征在于，所述荷重体的形状为球形、锥形或圆柱形。
  4. 一种液晶吸取装置，其中，所述装置包括：
    第一真空产生单元、柔性吸管以及荷重体；
    其中，所述荷重体设置于柔性吸管一端，所述柔性吸管另一端接第一真空产生单元。
  5. 根据权利要求4所述的装置，其中，所述荷重体为表面为玻璃或不锈钢的物体。
  6. 根据权利要求5所述的装置，其中，所述荷重体包括相交的两个表面，所述柔性吸管一端的开口设置于荷重体的其中一表面，并且所述荷重体的表面设置有开槽，所述开槽一端与柔性吸管一端的开口相通，所述开槽另一端通往荷重体的另一表面。
  7. 根据权利要求6所述的装置，其中，所述荷重体的形状为球形、锥形或圆柱形。
  8. 根据权利要求4所述的装置，其中，所述装置包括空气过滤单元，所述空气过滤单元设置于柔性吸管的管路中，并且包括盛装液晶的容器、第二真空产生单元以及液位检测单元，所述柔性吸管的一部分从容器开口置入容器内，并且置入容器内的柔性吸管部分断开，使柔性吸管分为接第一真空产生单元的第一吸管部分和接荷重体的第二吸管部分，所述第二真空产生单元设置于第二吸管部分，柔性吸管的断开部分均浸入容器的液晶中，所述液位检测单元检测到容器中液晶的液位低于第一高度阈值时，使第二真空产生单元抽取液晶进入容器内，并在检测到容器中液晶的液位高于第二高度阈值时，使第二真空产生单元停止抽取液晶，所述第二高度阈值大于第一高度阈值。
  9. 一种液晶涂布设备，其中，
    所述设备包括：涂布头和液晶吸取装置；
    所述液晶吸取装置包括：第一真空产生单元、柔性吸管以及荷重体；
    其中，所述荷重体设置于柔性吸管一端，所述柔性吸管另一端接第一真空产生单元，所述涂布头连接第一真空产生单元。
  10. 根据权利要求9所述的设备，其中，所述荷重体为表面为玻璃或不锈钢的物体。
  11. 根据权利要求10所述的设备，其中，所述荷重体包括相交的两个表面，所述柔性吸管一端的开口设置于荷重体的其中一表面，并且所述荷重体的表面设置有开槽，所述开槽一端与柔性吸管一端的开口相通，所述开槽另一端通往荷重体的另一表面。
  12. 根据权利要求9所述的设备，其中，所述荷重体的形状为球形、锥形或圆柱形。
  13. 根据权利要求9所述的设备，其中，所述液晶吸取装置包括空气过滤单元，所述空气过滤单元设置于柔性吸管的管路中，并且包括盛装液晶的容器、第二真空产生单元以及液位检测单元，所述柔性吸管的一部分从容器开口置入容器内，并且置入容器内的柔性吸管部分断开，使柔性吸管分为接第一真空产生单元的第一吸管部分和接荷重体的第二吸管部分，所述第二真空产生单元设置于第二吸管部分，柔性吸管的断开部分均浸入容器的液晶中，所述液位检测单元检测到容器中液晶的液位低于第一高度阈值时，使第二真空产生单元抽取液晶进入容器内，并在检测到容器中液晶的液位高于第二高度阈值时，使第二真空产生单元停止抽取液晶，所述第二高度阈值大于第一高度阈值。
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