CN100576040C - The apparatus and method that are used for the dispensing liquid crystal material - Google Patents

The apparatus and method that are used for the dispensing liquid crystal material Download PDF

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Publication number
CN100576040C
CN100576040C CN200710087370A CN200710087370A CN100576040C CN 100576040 C CN100576040 C CN 100576040C CN 200710087370 A CN200710087370 A CN 200710087370A CN 200710087370 A CN200710087370 A CN 200710087370A CN 100576040 C CN100576040 C CN 100576040C
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China
Prior art keywords
liquid crystal
crystal material
sendout
substrate
batching
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CN200710087370A
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CN101046586A (en
Inventor
金完洙
朴武烈
郑圣守
权赫珍
孙海晙
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LG Display Co Ltd
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LG Display Co Ltd
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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
    • G02F1/1303—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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • 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
    • B05C5/0225—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 characterised by flow controlling means, e.g. valves, located proximate the outlet
    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Automation & Control Theory (AREA)
  • Manufacturing & Machinery (AREA)
  • Mathematical Physics (AREA)

Abstract

The liquid crystal material distributor comprises: the sept height measurement unit, in order to measure the sept height on the substrate; The liquid crystal material distributor in order to determining to be assigned to the liquid crystal material amount on the substrate according to survey sept height, and is assigned to this liquid crystal material on the substrate.

Description

The apparatus and method that are used for the dispensing liquid crystal material
The application is that the application number of submitting on March 24th, 2003 is 03107368.9, and denomination of invention is divided an application for the Chinese patent application of " apparatus and method that are used for the dispensing liquid crystal material ".
Technical field
The present invention relates to a kind of liquid crystal ingredient device, be specifically related to be used for the liquid crystal ingredient device of the sendout of liquid crystal material on the control basal plate.
Background technology
Recently, owing to help such as mobile phone, individual digital that (Personal Digital Assistant, PDA), the size of the portable electron device of notebook computer and so on is little, in light weight, work is energy-conservation again, so this class device is developed.So, such as LCD (Liquid Crystal Display, LCD), plasma display (Plasma Display Panel, PDP), electroluminescence escope (Field Emission Display, FED) and vacuum fluorescent display (VacuumFluorescent Display, VFD) and so on panel display apparatus is also developed.In these panel display apparatus,, therefore produce in enormous quantities at present because LCD has and more simply drives design proposal and superior image quality.
Fig. 1 is the viewgraph of cross-section according to the LCD LCD device of prior art.In Fig. 1, LCD device 1 comprises infrabasal plate 5, upper substrate 3 and is arranged between the two liquid crystal layer 7.Infrabasal plate 5 is drive unit array base paltes, it comprise a plurality of pixel (not shown) and be arranged on each pixel such as thin film transistor (TFT) (Thin-Film Transistor, TFT) and so on drive unit.Upper substrate 3 is base plate of color light filter, and it comprises the color filter layer of reproducing natural colour.In addition, on infrabasal plate and upper substrate 3, be provided with pixel capacitors and common electrode respectively.On upper and lower base plate 3 and 5, all be provided with oriented layer, in order to make the Liquid Crystal Molecules Alignment of liquid crystal layer 7 neat.
Infrabasal plate 5 and upper substrate 3 combine by encapsulant 9 along periphery, and liquid crystal layer 7 is limited in this periphery.In addition, the liquid crystal molecule of liquid crystal layer 7 redirects by the drive unit that is provided with on the infrabasal plate 5, with the light quantity of control through liquid crystal layer 7, thus displayed image.
Fig. 2 is the process flow diagram according to the LCD device producing method of prior art.In Fig. 2, manufacture method comprises three subprocess making the LCD device: drive unit array base palte process, in order on infrabasal plate 5, to form drive unit; The base plate of color light filter process is in order to form chromatic filter on upper substrate 3; And haploidization.
Among the step S101, on infrabasal plate 5, form many gate lines and data line, limit pixel area thus, the thin film transistor (TFT) that formation and gate line and data line all link to each other on each pixel area by drive unit array process.In addition, form pixel capacitors by drive unit array process, it links to each other with thin film transistor (TFT), in order to drive liquid crystal layer according to the signal that applies by thin film transistor (TFT).
Among the step S104, form on upper substrate 3 by the chromatic filter process and to be used for R (red), G (green) and B (orchid) the color look light filter layer of reproducing color therewith, and common electrode is set.
In step S102 and S105, on infrabasal plate 5 and upper substrate 3, form oriented layer.Then, these oriented layers that rub separately are so that bring out surface anchoring (that is, tilt angle and orientation) for the liquid crystal molecule of liquid crystal layer 7.
In step S103, sept is distributed on the infrabasal plate 5, in order to keep the even cel-gap between infrabasal plate 5 and the upper substrate 3.
In step S106, along the upper substrate 3 outside encapsulants that apply.
In step S107, infrabasal plate 5 and upper substrate 3 are sticked together by pressurization.
Infrabasal plate 5 and infrabasal plate 4 are all made by glass substrate, and they comprise the unit board zone that is provided with drive unit and color filter layer above a plurality of.
In step S108, bonding good upper and lower base plate 5 and 3 is cut into unit board.
In step S109, liquid crystal material is expelled in the gap that forms between upper and lower base plate 5 and 3 by the liquid crystal filling orifice.
In step S109, finish the manufacturing of the unit board that has filled up material by the encapsulated liquid crystals filling orifice.
In step S110, check unit board through filler and sealing.
Fig. 3 is the synoptic diagram that is used to make according to the liquid crystal injection systems of the LCD device of prior art.Among Fig. 3, the container 12 that is holding liquid crystal material 14 is positioned at vacuum chamber 10, and LCD panel 1 is positioned at container 12 upsides.Then, vacuum chamber 10 is linked to each other with the vacuum pump (not shown), so that keep vacuum/pressurized state predetermined in the vacuum chamber 10.In addition, LCD panel mobile device (not shown) has been installed in vacuum chamber 10, in order to the upside of LCD panel 1 from container 12 moved on on the surface of liquid crystal material 14, so allow the filling orifice 16 of LCD panel 1 contact with liquid crystal material 14.Therefore, usually this method is called the liquid crystal impregnating method.
Under the state that keeps in touch on the filling orifice 16 of LCD panel 1 and the surface of liquid crystal material 14, by introducing nitrogen (N to vacuum chamber 10 in 2) and when reducing vacuum/pressurized level in the vacuum chamber 10, just can by filling orifice 16 liquid crystal material 14 be expelled in the LCD panel 1 by interior vacuum/pressurized level of LCD panel 1 and the pressure differential between vacuum chamber 10 internal pressures/level.After liquid crystal material 14 complete filling are in LCD panel 1, utilize encapsulant sealing filling orifice 16, so liquid crystal material 14 is sealed in the LCD panel 1.Therefore, this method is called as vacuum impregnation.
But, for liquid crystal impregnating method and/or vacuum impregnation, all have several problems.At first, the whole time that liquid crystal material 14 is expelled in the plate 1 is longer relatively.Generally speaking, drive unit array base palte and the gap thickness between the base plate of color light filter in the LCD panel 1 are very little, promptly several microns.Therefore, time per unit can only inject very a spot of liquid crystal material 14 to LCD panel 1.For example, liquid crystal material 14 is expelled to fully in 15 inches the LCD panel approximately needs 8 hours, has therefore reduced manufacturing efficient.
The second, the consumption of liquid crystal material 14 increases in the liquid crystal injection method.Have only very a spot of liquid crystal material 14 to be injected in the LCD panel 1 in the container 12.Therefore, LCD panel 1 is being installed in the process of vacuum chamber 10, unworn liquid crystal material 14 can be exposed in atmosphere or some gas, and this has just caused pollution to liquid crystal material 14.So, after liquid crystal material 14 being injected in a plurality of LCD panel 1, must lose any remaining liquid crystal material 14, this has just increased manufacturing cost.
Summary of the invention
Therefore, the present invention relates to a kind of apparatus and method of dispensing liquid crystal material, it can be avoided basically because the restriction of prior art and one or more problems that shortcoming causes.
The purpose of this invention is to provide a kind of apparatus and method that directly liquid crystal material are assigned on the glass substrate.
Another object of the present invention provides a kind of liquid crystal material batching set-up that can determine the liquid crystal material amount on the substrate that will be assigned to according to the sept height.
Another object of the present invention provides and a kind of liquid crystal material is assigned to method on the substrate.
To set forth other features and advantages of the present invention in the following description, will make them partly become obvious, perhaps can understand them by putting into practice the present invention by these descriptions.Purpose of the present invention and other advantage can realize and obtain by the concrete structure of pointing out in written description and claim and the accompanying drawing.
With general description, in order to realize these and other advantage, according to the object of the invention, the liquid crystal material batching set-up comprises just as here embodied: the sept height measuring device, in order to measuring the height of sept on the substrate; And the liquid crystal material distribution system, in order to determining to be assigned to the liquid crystal material amount on the substrate according to the sept height that records, and liquid crystal material is assigned on the substrate.
On the other hand, the liquid crystal material batching set-up comprises: the liquid crystal material distribution system, in order to utilize the distribution time of predetermined liquid crystal material, the unit sendout of liquid crystal material and batching position are assigned to liquid crystal material on the substrate, described liquid crystal material distribution system comprises device and method for dispensing liquid crystal, power supply and source of the gas, wherein said device and method for dispensing liquid crystal is in order to be assigned to liquid crystal material on the substrate by nozzle, and open and close the discharge orifice that links to each other with nozzle by solenoid coil magnetic force and spring tension moving along the vertical direction according to needle, thereby the sendout of control liquid crystal material, described power supply is in order to providing electric energy to solenoid coil, and described source of the gas is in order to liquid crystal material distribution system supplied with pressurized gas; And control module, in order to pass through sendout according to the sept high computational liquid crystal material of input, and will calculate the liquid crystal material sendout and the predetermined sendout of liquid crystal material make comparisons, calculating the compensation rate of liquid crystal material, and the liquid crystal material amount of Control Allocation to the substrate come in the unit sendout of the distribution time by proofreading and correct described liquid crystal material, liquid crystal material and batching position.
On the other hand, the method for dispensing liquid crystal material comprises: measure the height of sept on the substrate, according to the sendout of the sept high computational liquid crystal material that records, and will calculate to such an extent that the liquid crystal material of sendout is assigned on the substrate.
On the other hand, the distribution method of liquid crystal material comprises: the sept height on the input substrate, sendout according to the sept high computational liquid crystal material of importing, the distribution time of liquid crystal material, the unit sendout of liquid crystal material and batching position, and by will calculate the liquid crystal material sendout make comparisons with predetermined liquid crystal material sendout, calculate the compensation rate and the compensation batching pattern of liquid crystal material, with calculate distribution time of liquid crystal material, the unit sendout of liquid crystal material and batching position are assigned to liquid crystal material on the substrate, the quantity of this liquid crystal material be by will calculate the liquid crystal material compensation rate be added on the sendout of liquid crystal material and obtain, wherein, by nozzle liquid crystal material is assigned on the substrate, and opens and closes the discharge orifice that links to each other with nozzle by solenoid coil magnetic force and spring tension moving along the vertical direction, thereby control the sendout of liquid crystal material according to needle.
The general description and the following detailed description that it being understood that the front all are exemplary and illustrative, and it attempts to provide the of the present invention further explanation to claimed.
To provide further understanding of the present invention, in conjunction with a part that has constituted this instructions, it has illustrated embodiments of the invention with it below in conjunction with accompanying drawing, and is used from explanation principle of the present invention together with describing one.
Description of drawings
Fig. 1 is the viewgraph of cross-section according to the LCD LCD device of prior art;
Fig. 2 is the process flow diagram according to the LCD device producing method of prior art;
Fig. 3 is the synoptic diagram of liquid crystal injection systems that is used to make the LCD device according to prior art;
Fig. 4 is the viewgraph of cross-section according to exemplary LCD device producing method of the present invention;
Fig. 5 is the process flow diagram according to exemplary LCD device producing method of the present invention;
Fig. 6 is the skeleton view according to another exemplary LCD device producing method of the present invention;
Fig. 7 A and 7B are the synoptic diagram according to exemplary and batching set-up of the present invention;
Fig. 8 is the process flow diagram according to another exemplary LCD device producing method of the present invention;
Fig. 9 is the process flow diagram according to another exemplary LCD device producing method of the present invention;
Figure 10 is the block scheme according to exemplary control system shown in Fig. 7 A of the present invention and the 7B;
Figure 11 is the block scheme according to exemplary sendout computing unit shown in Figure 10 of the present invention;
Figure 12 is the process flow diagram according to another exemplary LCD manufacture method of the present invention;
Figure 13 is the process flow diagram according to another exemplary LCD manufacture method of the present invention;
Figure 14 is the planimetric map according to exemplary liquid crystal ingredient pattern of the present invention.
Embodiment
To make detailed now to the preferred embodiments of the present invention with reference to illustrating that their example is shown in the drawings.
Fig. 4 is the viewgraph of cross-section according to exemplary LCD device producing method of the present invention.Among Fig. 4, before assembling has the infrabasal plate 5 of drive unit and has the upper substrate 103 of chromatic filter, liquid crystal material 107 is added drop-wise on the infrabasal plate 105.What can select is liquid crystal material 107 can be added drop-wise on the upper substrate 103 that is provided with chromatic filter.For example, liquid crystal material 107 both can be set on thin film transistor (TFT) (TFT) substrate, also can be set on chromatic filter (CF) substrate.
At least one periphery along upper substrate 103 applies encapsulant 109.By exerting pressure to upper substrate 103 and infrabasal plate 105, upper substrate 103 and infrabasal plate 105 are sticked together, form LCD display board 101 thus.So, the drop of liquid crystal material 107 because of upwards and/or infrabasal plate 103 and 105 applied pressures be distributed between upper and lower base plate 103 and 105, formed the uniform liquid crystal material layer of thickness between upper substrate 103 and the infrabasal plate 105 thus.So, in according to exemplary LCD device producing method of the present invention, before upper and lower substrate 103 and 105 sticks together formation LCD display board 101, liquid crystal material 107 is added drop-wise on the infrabasal plate 105.
Fig. 5 is the process flow diagram according to exemplary LCD device producing method of the present invention.In step S201, can utilize the tft array process on upper substrate, to form drive unit such as TFT.
In step S204, utilize the chromatic filter process on infrabasal plate 105, to form color filter layer.Preferably the glass plate with a plurality of unit boards zone is implemented and substantially similar tft array process of common procedure and chromatic filter process.At this, upper substrate and infrabasal plate can comprise that area is about 1000 * 1200mm 2Above glass substrate.But, also can the less glass substrate of usable floor area.
In step S202 and S205, on upper and lower substrate, all oriented layer to be set, and they are rubbed.
In step S203, liquid crystal material is added drop-wise on the LCD unit board zone of infrabasal plate 105.
In step S206, along at least one outer peripheral portion subregion coating encapsulant of LCD unit board on the upper substrate.
In step S207, upper and lower substrate is put together relative to one another, exert pressure, utilize encapsulant to allow upper and lower substrate stick together mutually.So the liquid crystal material of dropping is distributed between upper and lower base plate and the encapsulant equably.
In step S208, the upper and lower base plate after bonding is handled, be cut into a plurality of LCD unit boards.
In step S209, check the LCD unit board.
Fig. 6 is the skeleton view according to another exemplary LCD device producing method of the present invention.Among Fig. 6, utilize the liquid crystal ingredient device 120 that is positioned at glass substrate 105 tops that liquid crystal material 107 is assigned on the glass substrate 105.Although not shown liquid crystal material 107, they are contained in the liquid crystal ingredient device 120.
Along with liquid crystal material 107 is added dropwise on the glass substrate 105, glass substrate 105 according to predetermined speed along X-and Y-to moving, liquid crystal ingredient device 120 is discharged liquid crystal material 107 with predetermined time interval simultaneously.So, be added drop-wise to liquid crystal material 107 on the glass substrate 105 between predetermined space along X-and Y-to arrangement.What can select is, glass substrate 105 maintains static, and liquid crystal ingredient device 107 along X-and Y-to moving, drip liquid crystal material 107 with predetermined space.But any vibration of liquid crystal ingredient device 120 all may change the shape of liquid crystal material 107, therefore can produce the dropping position of liquid crystal material 107 and the error of dripping quantity.Therefore, preferably, liquid crystal ingredient device 120 maintains static, and glass substrate 105 moves.
Fig. 7 A and 7B are according to exemplary liquid crystal ingredient schematic representation of apparatus of the present invention.In Fig. 7 A, liquid crystal ingredient device 120 is at dispensing liquid crystal material 107, and the expression liquid crystal ingredient device 120 when dispensing liquid crystal material 107 just among Fig. 7 B.
In Fig. 7 A and 7B, liquid crystal ingredient device 120 comprises columniform liquid crystal material container 124.Liquid crystal material container 124 comprise high mouldability, high-ductility, basically with liquid crystal material 107 nonreactive materials.But the intensity of polyethylene kind material is very low, so it is out of shape because of the stress that applies easily.When 124 distortion of liquid crystal material container, can not accurately liquid crystal material 107 be assigned on the substrate (not shown).Therefore, liquid crystal material container 124 can be inserted into the shell of being made by high-strength material (for example stainless steel) stops in 122.Air supply pipe 153 links to each other with outside air supply unit 152, and air supply pipe 153 is arranged on the top of liquid crystal material container 124.Utilize external air source unit 152 by air supply pipe 153 supplying nitrogen (N 2) and so on inert gas, these gases are arranged in liquid crystal material container 124 and are not the shared part of liquid crystal material 107.So this gas is exerted pressure to liquid crystal material 107, guiding liquid crystal material is assigned on the substrate (not shown).
Liquid crystal material container 124 can comprise the material that deformation can not take place of stainless steel and so on.Therefore, when liquid crystal material holds 124 when being made by stainless steel, just no longer needed housing 122, this has just reduced the manufacturing cost of liquid crystal ingredient unit 120.The internal coat of liquid crystal material container 124 fluororesin, can avoid the sidewall generation chemical reaction of the liquid crystal material that holds in the liquid crystal material container 124 107 and liquid crystal material container 124 whereby.
Although not shown, stretch out a projection from the bottom of liquid crystal material container 124, in housing 122, form an opening and held above-mentioned projection.So the projection of liquid crystal material container 124 can be inserted in the opening of housing 122, and engage with first attachment 141.On projection, be provided with first female screw part (being nut), on first end of first attachment 141, be provided with first male screw portion (being bolt) simultaneously.So the projection and first attachment 141 can be bonded together by first female screw part and second male screw portion.
Second end at first attachment 141 is provided with the second female screw part, is provided with the second positive nut portion at first end of second attachment 142.So first and second attachment 141 are bonded with each other by second female screw part and second male screw portion.
One needle plate 143 is inserted in second female threaded part of first attachment 141.So, when second male screw portion of second attachment 142 is inserted in second female screw part of first attachment 141 and engages, just needle plate 143 can be set between first and second attachment 141 and 142.Thus, liquid crystal material 107 is discharged from liquid crystal ingredient device 120 by the discharge orifice (not shown) that forms in the needle plate 143.
Be provided with nozzle 145 on second attachment 142, it engages with first attachment 141 by second female screw part and second male screw portion.Nozzle 145 comprises holding components 147 and the discharging 146 that partly engages with second female screw, the liquid crystal material of arranging in the liquid crystal material container 124 107 can be assigned on the substrate by this floss hole.
Floss hole 146 can stretch out from holding components 147, and it comprises second male screw portion.The diameter that is arranged on the floss hole 146 in the nozzle 145 is smaller, so that can accurately control the distribution of liquid crystal material 107.
Delivery pipe (not stretching out) can be set in holding components 147, and delivery pipe reaches in the discharge orifice (not shown) of needle plate 143.Delivery pipe can link to each other with floss hole 146.
Needle 136 can insert in the liquid crystal material container 124, so first end of needle 136 contacts with needle plate 143.First end of needle 136 is set to taper shape, and its size conforms to the size of discharge orifice basically.So when needle 136 contacted with needle plate 143, needle 136 will block discharge orifice, in case liquid crystal material 107 flows out.
Second end of needle 136 is arranged on the position near the upper shell 126 of liquid crystal ingredient device 120, is provided with spring 128 and bar magnet 132 at this.Bar magnet 132 is for example made by ferromagnet or soft magnetic material.Be provided with gap control unit 134 above needle 136 and bar magnet 132, at least a portion that centers on bar magnet 132 for example can be provided with columniform solenoid coil 130.Although not shown, solenoid coil 130 will join with supply of electrical energy unit 150, so that receive electric energy from the supply of electrical energy unit.In a single day solenoid coil 130 obtains supply of electrical energy and just applies magnetic force to bar magnet 132.
Needle 136 and bar magnet 132 apart preset distance X.So, when electric energy is offered solenoid coil 130, just applied magnetic force for bar magnet 132, allow needle 136 move, thereby contact with bar magnet 132 along last direction.Not when solenoid coil 130 provides electric energy, the elastic force of spring 128 is got back to its initial position in a downward direction by needle 136.So, needle 136 towards or can open, close the discharge orifices that form in the needle plate 143 away from just moving up and down of needle plate 143.But along with first end of needle 136 contacts each time repeatedly with needle plate 143, this depends on the electric energy that provides to solenoid coil 130 is provided certainly, and first end of needle 136 and needle plate 143 all can be impaired.Therefore, first end of needle 136 and needle plate 143 will be made by the metal species hard material of ability deformation basically.In addition, needle 136 will be made by magnetic material, and it could be attracted by the magnetic force of bar magnet 132 like this.
In Fig. 7 B, when when solenoid coil 130 applies electric energy, needle 136 moves away from needle plate 143 in the upward direction, opens floss hole thus.So, be supplied to the nitrogen of liquid crystal material container 124 that liquid crystal material 107 is exerted pressure, so distribute liquid crystal material 107 by nozzle 145.The amount of the liquid crystal material 107 that distributes by nozzle depends on time that floss hole is opened and the nitrogen pressure in the liquid crystal material container 124.The time that floss hole is opened is depended on the magnetic force that 130 pairs of magnetic force 132 of distance X, solenoid coil of 132 of needle 136 and bar magnets apply and the intrinsic elastic force of spring 128.The magnetic force that bar magnet 132 is applied and the coiling total number of turns of solenoid coil 130 or the electric energy that provides for solenoid coil 130 are in proportion.Distance between needle 136 and the bar magnet 132 is by gap control unit 134 controls.
Be provided with flowrate control valve 154 from source of the gas 152 to the air supply pipe 153 of liquid crystal material container 124 supply gas.Flowrate control valve 154 is regulated the gas flow that enters liquid crystal material container 124 according to the control signal that main control unit 160 provides.So, in liquid crystal material container 124, for example can utilize main control unit 160 and flowrate control valve 154 to keep predetermined pressure.Except Control Flow operation valve 154, main control unit 160 also controllable power 150 provides electric energy to solenoid coil 130.
In addition, a sept height measurement unit 170 is linked to each other with control module 160, in order to measuring the sept height of arranging on the substrate, and institute survey is highly offered control module 160.In the method for dispensing liquid crystal material, can use patterning sept or cylindrical space thing.For example, when liquid crystal material was assigned to the large-scale LCD panel with spherical spacer, spherical spacer was difficult to evenly disperse.Therefore, the patterning sept can be set in the precalculated position of LCD panel.Can the patterning sept be arranged on the base plate of color light filter at chromatic filter procedure of processing S204 (among Fig. 5), then liquid crystal material be added drop-wise on the thin film transistor base plate.Then, assemble base plate of color light filter and TFT substrate, thereby finish the manufacturing of LCD panel.In the liquid crystal material apportion design, the liquid crystal material sendout on the TFT substrate depends on the plate total amount that is provided with on substrate area, the substrate, the viscosity of liquid crystal material and the predetermined altitude of cel-gap.
Under the distinguishing situation of predetermined altitude of the height of the patterning sept that is provided with on the base plate of color light filter and cel-gap, can produce deviation, although distributed the liquid crystal material of predetermined sendout for substrate this moment, the amount of liquid crystal material also will there are differences with the liquid crystal material amount of the best in the LCD panel.If the sendout of liquid crystal material is less than the optimal allocation amount, liquid crystal indicator will go wrong in normal blank screen pattern and normal white screen mode process.
In addition, if the sendout of liquid crystal material greater than the optimal allocation amount, will produce the gravity shoddy goods when making LCD panel.The gravity shoddy goods are when making LCD panel, increase generation because the volume Yin Wendu of the liquid crystal material that is provided with in the LCD panel raises.So the cel-gap of LCD panel increases to greater than the sept height, liquid crystal material is because of gravity migration downwards.Thus, the cel-gap of LCD panel becomes inhomogeneous, and this descends the display quality of LCD device.During the dispensing liquid crystal material, sept height measurement unit 170 is measured the height of the patterning sept that is provided with on the substrate, utilizes the sendout of highly determining liquid crystal material of surveying, and can determine the liquid crystal material amount that will distribute on substrate thus consistently.
At this, if above to be provided with the substrate of sept different with the substrate of dispensing liquid crystal material, will in the included step of chromatic filter procedure of processing S204-S206 (Fig. 5), measure the sept height.Then, survey sept height is sent to the tft array procedure of processing S201-S203 (among Fig. 5) that wants the dispensing liquid crystal material, determine the sendout of liquid crystal material thus, and the dispensing liquid crystal material.So, the sept measuring unit can be joined among the chromatic filter procedure of processing S204-S206, the extra cell that is used to send the sept height of surveying also is essential, this can increase equipment cost.In addition, when the measuring height of the measuring height of the base plate of color light filter that will assemble and TFT does not match, will produce the batching inferior goods.
Fig. 8 is the process flow diagram according to another exemplary LCD device producing method of the present invention.In Fig. 8, step S301 comprises and utilizes the tft array process to form thin film transistor (TFT) on infrabasal plate.
In step S304, chromatic filter is set on upper substrate by the chromatic filter process.In addition, in the chromatic filter process, the patterning sept to be set in the presumptive area of upper substrate.
In step S302 and S305, on upper and lower base plate, apply oriented layer respectively, separately they are rubbed then.
In step S303, along the outside encapsulant that applies of infrabasal plate.
In step S306, liquid crystal material is assigned on the upper substrate.
In step S307, will apply the upper substrate of encapsulant and distribute the infrabasal plate of liquid crystal material to assemble.
In step S308, the upper and lower base plate after the assembling is handled.
In step S309, check the upper and lower base plate of handling well.
In above-mentioned liquid crystal display board manufacturing process, can on the upper substrate corresponding, carry out the height of patterning sept and measure with base plate of color light filter, and the dispensing liquid crystal material.Therefore can utilize the height and the dispensing liquid crystal material of same measurement device patterning sept.Provide measurement with the integrally formed sept height measurement unit 170 (among Fig. 7) of liquid crystal ingredient device, carried out process shown in Figure 8 by it to patterning sept height.
Fig. 9 is the process flow diagram according to another exemplary LCD device producing method of the present invention.Among Fig. 9, step S401 is included in thin film transistor (TFT) is set on infrabasal plate in the tft array process.In addition, in the sept process patterning sept to be set in the presumptive area of infrabasal plate.
In step S404, chromatic filter is set on upper substrate by the chromatic filter process.
In step S402 and S405, be respectively upper and lower base plate and apply oriented layer, then friction separately respectively.
In step S403, liquid crystal material is assigned on the infrabasal plate.
In step S406, along the outside printing and sealing material of upper substrate.
In step S407, will apply the upper substrate of encapsulant and distribute the infrabasal plate of liquid crystal material to fit together.
In step S408, the upper and lower base plate after the assembling is handled.
In step S409, check the upper and lower base plate of handling well.
Can obtain the height of patterning sept by the whole bag of tricks, for example utilize laser or mechanical means, utilize sept height measurement unit 170 (Fig. 7).Sept height measurement unit 170 can be integrally formed with the liquid crystal ingredient device, is arranged but also can divide.For example shown in Figure 5, can in different processes, implement the measurement of patterning sept height and the distribution of liquid crystal material.Therefore, can be respectively liquid crystal material batching set-up and sept height measurement unit 170 be set along the different process line of tft array process and chromatic filter process.But owing to sept height measurement unit 170 directly or indirectly links to each other mutually with the liquid crystal material batching set-up, so the former can import the data that record to the latter.
Figure 10 is the block scheme according to exemplary control system shown in Fig. 7 A of the present invention and the 7B.In Figure 10, control module 160 comprises: sept height input block 161, the height of the patterning sept that records to its input sept height measurement unit 170; Input block 162 is imported the total amount and the liquid crystal material information of each display board that forms on the information, substrate of relevant substrate specific region to it; Sendout computing unit 164 is used for calculating the liquid crystal material amount that will distribute on the substrate according to the patterning sept height of input and the liquid crystal material information of input; Substrate drive unit 166 in order to driving substrate, allows top batching position just in time be positioned at the device and method for dispensing liquid crystal below; Controlling electric energy unit 167, in order to driving power 150, make its corresponding to sendout calculate power supply 164 calculate to be the liquid crystal material sendout that substrate distributes, by power supply 150 supply electric energy; Flow controlling unit 168, in order to calculate corresponding to sendout power supply 164 calculate sendout calculate gas flow, and Control Flow operation valve 154 is so that control source of the gas 152 is to the gas flow of liquid crystal material container 124 supplies; And output unit 169, in order to exporting every information, for example fixed patterning sept height, calculate the liquid crystal material sendout and current liquid crystal material distribution state.Sendout computing unit 164 will be assigned to the liquid crystal material amount on the LCD panel and the unit sendout of liquid crystal material according to the height of the size of display board, patterning sept and liquid crystal material information calculations.
Figure 11 is the block scheme according to exemplary sendout computing unit shown in Figure 10 of the present invention.In Figure 11, sendout computing unit 164 comprises batching pattern determining unit 164a and compensation batching pattern determining unit 164b.Liquid crystal material sendout on the substrate can be calculated according to the characteristic of display board area, patterning sept height, liquid crystal material and substrate.When upper and lower base plate is fitted together, can allow the liquid crystal material that is assigned on the substrate between upper and lower base plate, flow by exerting pressure.The mobile of liquid crystal material influenced by liquid crystal material characteristic, the board structure such as the patterning sept is arranged such as viscosity.So during flow in having determined liquid crystal material unit quantity zone, batching pattern determining unit 164a just can determine in this zone the pattern of preparing burden of the liquid crystal material on the LCD panel.
Batching pattern determining unit 164a can determine the batching pattern of LCD panel when beginning to prepare burden.For example, under situation about liquid crystal material being assigned on the same size display board, distribute if start initial liquid crystal material, will be on LCD panel with the liquid crystal material continuous dispensing.Therefore, input identical information and definite new batching pattern are just no longer necessary.But in the sept process, the height of patterning sept can change because of external pressure or processing conditions, and this can produce the error that departs from predetermined altitude (the initial measurement height of sept).Therefore, because of having produced the sept height error, just must the sendout of liquid crystal material be compensated, this can realize by proofreading and correct the batching pattern.Batching pattern determining unit 164a determines the batching pattern according to the compensation rate of liquid crystal material sendout, even the height of patterning sept changes like this, also the liquid crystal material of respective amount can be assigned on the substrate.
In the batching pattern after confirming (that is, the distribution time of liquid crystal material, the unit sendout of liquid crystal material, and batching position) input substrate driver element 166, controlling electric energy unit 167 and flow controlling unit 168.Controlling electric energy unit 167 is according to the electric energy of determining through the data of confirming (the distribution number of times of liquid crystal material, the unit sendout of liquid crystal material) to supply, and this signal is offered power supply 150, thus corresponding electric energy offered solenoid coil 130.Flow controlling unit 168 is according to the definite gas flow that will supply of input data, and Control Flow operation valve 154, gives liquid crystal containers 124 with the nitrogen supply (NS) of respective amount thus.In addition, substrate drive unit 166 is according to the output of the liquid crystal material distribution locations data through determining substrate drive signal, and driving substrate CD-ROM drive motor (not shown) moving substrate, allows the liquid crystal ingredient device align with the liquid crystal material distribution locations of substrate thus.
The liquid crystal material amount is calculated by controlling electric energy unit and flow controlling unit 168, and the liquid crystal material with calculated amount is assigned on the substrate then.The liquid crystal material amount of distributing on the substrate is subjected to following factor affecting: the elastic force of the spring 128 that is provided with on the needle 136 is supplied to the gas supply (being the liquid crystal material applied pressure) of liquid crystal material container 124, the electric weight that applies for solenoid coil 130.In these factors, aspect the sendout that changes liquid crystal material, the elastic force of spring 128 is variable factors at least, therefore can make qualification to it in advance.So the sendout of liquid crystal material depends primarily on gas supply that is supplied to liquid crystal material container 124 and the electric weight that applies for solenoid coil 130.Therefore, can be in keeping these two factors one be in constant level in, by controlling the sendout that another factor changes liquid crystal material.
Output unit 169 not only can show liquid crystal display board size and the liquid crystal material characteristic by input voltage 162 inputs, and can also show the measuring height by the patterning sept of sept height input block 161 inputs.In addition, output unit 169 also can show current batching state such as the batching pattern according to following content: the data of input, liquid crystal material distribute the unit sendout of time, liquid crystal material, the liquid crystal material that distributed at present to distribute time, current batching position and the current sendout of liquid crystal material, and all that the user can be in manufacture process are discerned these values constantly thus.
Figure 12 is the process flow diagram according to another exemplary LCD device producing method of the present invention.In Figure 12, step S501 comprises one that loads in TFT substrate and the base plate of color light filter.
In step S502, utilize patterning sept height measurement unit to measure the height of the patterning sept that forms in the last process.
In step S503, institute is surveyed patterning sept height input device and method for dispensing liquid crystal.Thus, determine the sendout of input information, liquid crystal material, the distribution number of times of liquid crystal material, the unit sendout of prepare burden position and liquid crystal material.
In step S504, by calculate the liquid crystal material sendout determine to offer the electric weight of solenoid coil 130 (among Fig. 7 A and the 7B).
In step S505, by the electric energy of control power supply 150 (among Fig. 7 A and the 7B) to the definite amount of solenoid coil 130 (among Fig. 7 A and the 7B) supply.
In step S508, at the batching position dispensing liquid crystal material of this batching pattern.
In step S506, (among Fig. 7 A and the 7B) applies certain air pressure to liquid crystal material container 124, and corresponding gas supply sendout according to calculate the liquid crystal material sendout determine.
In step S507, shown in Fig. 7 A and 7B, the air-flow of quantity being determined by flow feeding unit 152 by Control Flow operation valve 154 is supplied to liquid crystal material container 124, distributes liquid crystal material 107 thus.
Can be simultaneously or respectively in keeping gas flow and the institute energy of power one control electric energy that offers solenoid coil 130 and the gas flow that is supplied to liquid crystal material container 124 in constant.
Although not shown, substrate can move when the dispensing liquid crystal material, and the liquid crystal ingredient device is positioned at the batching position of substrate thus.
Figure 13 is the process flow diagram according to another exemplary LCD device producing method of the present invention.Among Figure 13, the patterning sept height that in step S601, records in the input sept forming process.
In step S602, the liquid crystal material amount that will distribute on the patterning sept high computational substrate according to input.
In step S603, by will calculate liquid crystal material sendout and predetermined liquid crystal material sendout, the liquid crystal material sendout of promptly determining in advance make comparisons, calculate the compensation rate of liquid crystal material.
In step S604, determine the distribution locations and the distribution time of liquid crystal material, determine the batching pattern of liquid crystal material compensation rate thus.
In step S605, allow liquid crystal ingredient one install 120 (among Fig. 7 A and 7B) and batching aligned in position by driving substrate, make it corresponding to the batching pattern of determining,
In step S606, liquid crystal material is assigned on the substrate.
The liquid crystal material amount that is distributed by liquid crystal ingredient device 120 is not the compensation rate of liquid crystal material, but by with liquid crystal material compensation rate and the addition of liquid crystal material sendout or from the liquid crystal material sendout, deduct total liquid crystal material sendout that the liquid crystal material compensation rate obtains.In addition, the batching pattern through determining is not only the batching pattern corresponding to the liquid crystal material compensation rate, but total batching pattern of the liquid crystal material compensation rate that has applied.
Figure 14 is the planimetric map according to the exemplary liquid crystal ingredient pattern of the present invention.In Figure 14, the batching pattern of liquid crystal material comprises several dissimilar according to following factor: the display board characteristic such as the display board shape; Such as the liquid crystal material characteristic of liquid crystal material viscosity, and the mode of operation of liquid crystal indicator.The liquid crystal indicator that for example, the batching pattern of dumb-bell shape can be used for the TN pattern.
The droplet profile that is added drop-wise to the liquid crystal material on the LCD panel 105 scatter because of exerting pressure, so they flow through the whole zone of LCD panel 105 uniformly.In addition, liquid crystal material influences in the device pattern that mobile on the LCD panel 105 is subjected to be provided with on the shape of LCD panel 105 and the LCD panel 105.Under LCD panel 105 was square situation, the liquid crystal material along continuous straight runs disperseed to disperse institute's time spent long than vertically, so the batching pattern of liquid crystal material is understood the along continuous straight runs deflection.In addition, the chromatic filter (not shown) that is provided with on the LCD panel 105 be configured to towards LCD panel the data line direction, be on the substrate Y to, therefore will be, be that directions X produces a step-length towards the gate line direction.So reduce along the liquid crystal dispensing rate of X-direction dispensing rate with respect to the Y-direction.
Under the TN pattern, the frictional direction of the oriented layer (not shown) that forms on the upper and lower base plate of LCD panel 105 is perpendicular to one another.Frictional direction has vertically reduced the rate of dispersion of liquid crystal in the substrate assembling process, so the frictional direction of oriented layer can not produce appreciable impact to dispersed liquid crystal.But, can not discharge of the influence of the frictional direction of oriented layer fully to dispersed liquid crystal.So the principal element to the influence of the batching mode producing of liquid crystal material in the substrate in batch process of assembling comprises the device pattern that forms on substrate shape and the substrate.Therefore, utilize dumb-bell shape batching pattern shown in Figure 14 that liquid crystal material 107a and 107b are assigned on the LCD panel 105.
Can compensate the batching pattern and be added on the predetermined batching pattern, perhaps therefrom deduct compensation batching pattern.Can compensate the plus-minus of batching pattern at the prepare burden middle body of pattern of dumb-bell shape.In Figure 14, the batching pattern I07a that is made of solid line represents the batching pattern of being scheduled to, and the batching pattern of indicating to compensate by the batching pattern I07b that dotted line constitutes.That is to say, be added to (promptly will increase the liquid crystal material amount) in the predetermined batching pattern time will compensating the batching pattern that the indicate compensation batching pattern I07b that will add of dotted line is so be assigned to additional liquid crystal material on this position.In addition, when predetermined batching pattern has reduced compensation batching pattern when so much, will from predetermined compensation model, remove the batching pattern I07b that dots, so stop to go up batching to batching pattern 107b.
It is obvious to those skilled in the art that and under the situation that does not break away from the spirit and scope of the present invention, to make various improvement and variation liquid crystal material distributor of the present invention and method.Therefore, this means that if these improvement of the present invention and variation are dropped in the scope and equivalent scope thereof of claims, these improvement and variation have just been contained in the present invention.

Claims (7)

1. liquid crystal material distributor is characterized in that it comprises:
The liquid crystal material distribution system, in order to the distribution time of utilizing predetermined liquid crystal material, the unit sendout and the batching position of liquid crystal material liquid crystal material is assigned on the substrate, described liquid crystal material distribution system comprises: device and method for dispensing liquid crystal, in order to liquid crystal material is assigned on the substrate by nozzle, and opens and closes the discharge orifice that links to each other with nozzle by solenoid coil magnetic force and spring tension moving along the vertical direction, thereby control the sendout of liquid crystal material according to needle; Power supply is in order to provide electric energy to solenoid coil; And source of the gas, in order to liquid crystal material distribution system supplied with pressurized gas; And
Control module, in order to sept high computational liquid crystal material sendout according to input, then with calculating of liquid crystal material the predetermined sendout of sendout and liquid crystal material is made comparisons, calculate the compensation rate of liquid crystal material with this, and the liquid crystal material amount of Control Allocation to the substrate come in the unit sendout of the distribution time by proofreading and correct described liquid crystal material, liquid crystal material and batching position.
2. liquid crystal material distributor according to claim 1 is characterized in that described sept comprises the cylindrical space thing.
3. liquid crystal material distributor according to claim 1 is characterized in that described control module comprises:
Compensation batching pattern determining unit is in order to determine compensation batching pattern according to the sept height by the sendout error of calculating liquid crystal material;
The controlling electric energy unit, in order to the control power supply will corresponding to calculate the electric energy of liquid crystal material sendout offer solenoid coil; And
Substrate drive unit aligns in order to dropping position and liquid crystal material distribution system with liquid crystal material.
4. liquid crystal material distributor according to claim 1 is characterized in that described control module comprises:
Compensation batching pattern determining unit is in order to determine compensation batching pattern according to the sept height by the sendout error of calculating liquid crystal material;
Flow controlling unit, in order to the control gas source and flow amount so that will corresponding to calculate the gas of liquid crystal material sendout be fed in the liquid crystal material container; And
Substrate drive unit aligns in order to dropping position and liquid crystal material distribution system with liquid crystal material.
5. liquid crystal material distributor according to claim 1 is characterized in that described control module comprises:
Compensation batching pattern determining unit is in order to determine compensation batching pattern according to the sept height by the error of calculating the liquid crystal material sendout;
Flow controlling unit, in order to the control gas source and flow amount so that will corresponding to calculate the gas of liquid crystal material sendout be fed in the liquid crystal material container;
The controlling electric energy unit, in order to the control power supply will corresponding to calculate the electric energy of liquid crystal material sendout offer solenoid coil; And
Substrate drive unit is in order to align the distribution locations of liquid crystal material with the liquid crystal material distribution system.
6. liquid crystal material distribution method is characterized in that it comprises:
The height of sept on the input substrate;
According to the sept high computational liquid crystal material sendout of input, the distribution time of liquid crystal material, the unit sendout and the batching position of liquid crystal material, and by will calculate the liquid crystal material sendout make comparisons with predetermined liquid crystal material sendout, calculate the compensation rate and the compensation batching pattern of liquid crystal material; And
With calculate the unit sendout and the batching position of distribution time, liquid crystal material of liquid crystal material a certain amount of liquid crystal material is assigned on the substrate, this of liquid crystal material is a certain amount of be by will calculate the liquid crystal material compensation rate be added on the liquid crystal material sendout and obtain
Wherein, liquid crystal material is assigned on the substrate, and passes through solenoid coil magnetic force and the spring tension mobile discharge orifice that links to each other with nozzle that opens and closes along the vertical direction according to needle by nozzle, thus the sendout of control liquid crystal material.
7. method according to claim 6 is characterized in that, the distribution time of described liquid crystal material, the unit sendout of liquid crystal material and batching position are the batching pattern, and described batching pattern is a dumb-bell shape.
CN200710087370A 2002-03-23 2003-03-24 The apparatus and method that are used for the dispensing liquid crystal material Expired - Lifetime CN100576040C (en)

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